WO2011113183A1 - Connecting sleeve for extension ladder - Google Patents

Connecting sleeve for extension ladder Download PDF

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Publication number
WO2011113183A1
WO2011113183A1 PCT/CN2010/000909 CN2010000909W WO2011113183A1 WO 2011113183 A1 WO2011113183 A1 WO 2011113183A1 CN 2010000909 W CN2010000909 W CN 2010000909W WO 2011113183 A1 WO2011113183 A1 WO 2011113183A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
transposition
rotary
seat
connected
connecting
Prior art date
Application number
PCT/CN2010/000909
Other languages
French (fr)
Chinese (zh)
Inventor
王万兴
Original Assignee
宁波兴富工具有限公司
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

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/08Special construction of longitudinal members, or rungs or other treads
    • E06C7/082Connections between rungs or treads and longitudinal members
    • E06C7/086Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/04Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/06Securing devices or hooks for parts of extensible ladders

Abstract

A connecting sleeve for an extension ladder is provided, which includes a connecting ring (1) and a connecting block (2). A rotary seat (3) and a rotary panel (4) are set on the joint surface between the connecting block (2) and the connecting ring (1). The rotary seat (3) is fixed relative to the connecting ring (1), and a socket (31) is set in the centre of the rotary seat (3). A rotating shaft (32) extends to the centre of the socket (31) from two sides of the socket (31) respectively, and a vertical part (41) of the rotary panel (4) is inserted into the socket (31); furthermore, a torque spring (5) is installed outside the rotating shaft (32) so that the horizontal part (42) of the rotary panel (4) can be rotated towards the connecting block (2) about the rotating shaft. When the extension ladder is folded, a fixed safe space between the rungs of the ladder is provided by the rotary panels (4) for preventing fingers from being clamped, meanwhile, the integral height of the ladder can be reduced so as to facilitate package and transportation of the ladder when the horizontal part (42) of the rotary panel (4) is folded.

Description

A telescopic ladder connection sleeve for

FIELD

Technical Field The present invention relates to a retractable ladder, in particular, relates to a connecting sleeve for a telescopic ladder. Background technique

Using a ladder in the construction, decoration, advertising, family, home field has been quite extensive. Currently, the market is down more popular retractable telescopic ladder, which when not in use, can be shortened and easy storage, handling. Patent No. ZL200420091638.2 (Publication No. is CN2716479Y) prior patent "A telescopic ladders", it discloses such a telescopic ladder, comprising a crossbar and a vertical bar, vertical bar sleeve can be several sections telescopically Taojie, disposed between the plurality of crossbar two opposite vertical bar, at both ends of each bar are provided with a retractable pin shaft, the shaft pin and the opening in the sleeve respectively thereto corresponding positioning socket adapted, in each section of the upper end of the sleeve is sleeved annular coupling sleeve, and the connecting sleeve are connected together and the rail. Such extension ladder in use, because there is no fixed gap between the top and bottom rails, and will help the user's hands in a generally bar, when retracted telescopic ladder, the bar will be pressed upward under resting finger on the crossbar, unsafe risks. SUMMARY

The present invention solves the technical problem for the prior art and the present situation to provide a connecting sleeve for a telescopic ladder, making it between top and bottom rails having a constant pitch, effectively prevent extension ladder retracted, the finger pressure bar and when the product packaging, shipping, and overall height is not too high, very suitable for practical use.

The present invention is to solve the above technical problem is technical solution: The telescopic ladder connecting sleeve, comprising a connecting ring integrally connected and a connection block, characterized in that: the junction surface between the connecting ring and the connecting block It is provided with a rotating plate and transposition;

Wherein said connecting ring is fixed relative to the transposase, the transposase has a central opening socket, and the socket side edges extend toward the center of a rotating shaft;

The rotary plate substantially T-shaped, the vertical portion thereof is inserted into the socket transposition, which is located on the transverse portion transposition, and two revolutions of the shaft seat laterally inserted into the shaft hole of the vertical portion;

And the rotating lateral plate portion of the shaft portion of the vertical bore, the outer shaft is provided with a torsion spring, with one end connected to the rotation shaft hole plate inside the torsion spring, the other end is connected to the transposition, the rotating plate can be the shaft is rotated in the direction of the connector block and always has a tendency toward rising upward transposition.

Said connecting collar is provided on the outer sleeve corresponding to the vertical bar and connected to the vertical bar, is inserted into the connecting block end rail

--1 are connected with a cross bar to confirm this.

To further ensure the rotating plate disposed transposition and can effectively protect the user's hands, the rotating plate has a height greater than the thickness of the fingers.

For ease of component assembly, the transposase may be formed by combining about two minutes from transposon, transposition is divided by a bottom and inserted into the boss at the connection between the connecting ring and the connecting block.

As a further improvement, lateral portion of the rotating plate may be trapezoidal, so, the top portion having a horizontal transverse surface facilitates upward against the bottom rail, and the thickness of the rotary plate transposase adapted, thus, the rotary plate when upright, which is configured integrally with a transposase, clean surface, the transverse portion of the rotating plate is folded down in the rear side of the transposition, the top surface of the rotary plate surface substantially flush with a transposase. , To ensure that the rotating plate protects the fingers when erected, the overall height of the rotating plate is preferably greater than equal 2CM. Compared with the prior art, advantages of the present invention is characterized: by transposition, the rotating plate and the torsion spring is disposed between the lateral portion of the rotary plate capable of rotating shaft as the center, and the coupling sleeve relative to the transposase itself rotates, when the telescopic ladder normal use, always due to the rotation plate relative to the rising upward transposition, between the top and bottom rails apart due to the rotation plate having a fixed pitch, the pitch can accommodate a finger, effectively preventing retracted telescopic ladder, the cross-over pressing the lever positioned beneath the finger bar, and, when the telescopic ladder packing and shipping, can be folded down plate is rotatable transverse portion, located on one side of the transposon, so that only the height of the transposition between the top and bottom rails when the spacing of the product packaging, shipping, and overall height is not too high, very suitable for practical use. BRIEF DESCRIPTION

1 a schematic structural diagram of an embodiment of the present invention;

In the structural diagram of FIG. 2 is folded down state of the rotating plate embodiment of the invention;

3 an exploded perspective view of an embodiment of the present invention. detailed description

Example embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Application of telescopic ladder embodiment of the present invention, includes a fixed two vertical rods and a plurality of oppositely disposed the vertical bar between two cross bars, comprising two side rail inner and outer telescopic tube Taojie, in a crossbar fixed between two opposing sections with the sleeve, and the ends of each crossbar of the embodiment of the present invention is connected with a corresponding set of vertical bar relative to the fixed sleeve embodiment;

1, 2 and 3, is connected to the telescopic ladder set, comprising a connecting ring connected to the connector block 1 and 2 integrally provided on the junction surface between the connection block 2 is connected with a ring a transposition rotating plate 4 and 3;

Wherein the ring is connected to the casing 1 corresponding to the set of fixed vertical bar provided, connecting block 2 is inserted into the corresponding end of the crossbar; 3 transposase the two left and right points of a transposable 3a splicing, half turn 3a 33 is inserted through the seat stud is connected to the bottom side of the ring 1, ring 1 is connected and fixed so as to correspond, transposition socket 3 has a central opening 31, and the side edges of the socket 31 has a rotary shaft 32 extends toward the center, respectively;

The rotary plate 4 substantially T-shaped, the overall height of 3CM, vertical portion 41 which is inserted into the socket 3 in the transposition 31, its transverse portion 42 has a trapezoidal shape and is positioned above the transposition 3, 4 of the rotating plate thickness transposition is substantially the same thickness of 3; ■

3 on two rotating shafts 32 laterally transposon inserted into the shaft hole 41 of the vertical portion 41a, the transverse portion of the rotary plate 424 can be rotated about the rotary shaft 32, the rotatable plate 424 is rotated transverse portion 2 to one side of transposition, i.e., the relative connecting block 2 Zhedao;

Further, the rotating plate 4 of the inner shaft hole 41 of the vertical portion 41a, the outer shaft 32 is provided with a torsion spring 5, one end is connected to the shaft hole 51 of the torsion spring 5 and the rotating plate 41a of the inner side 4, and the other end 52 with a transposase 3 is connected to the lateral portion of the rotating plate 414 to the rotary shaft 32 can be rotated in the direction of the connection block 2 as a center always has a tendency to turn upwardly stand holder 3, i.e., in the absence of external force, the rotation of the plate 4 transverse portion 41 always upward, in practical applications, so that between the top and bottom rails spaced apart by the entire extension ladder 4 and the rotary plate 3 transposition, only the lower rotating plate 414 of the transverse portion where the external force is applied to folded down toward the connection block 2, so that only separated by the transposition between the top and bottom rails 3.

Claims

Rights request
1, is connected to a telescopic ladder set, comprising a ring connected to integrated connector (1) and the connection block (2), characterized in that: the connection between the connecting ring (1) and the connection block (2) the surface is provided with a rotation seat (3) and the rotary plate (4);
Wherein said transfer seat (3) relative to the connecting ring (1) is fixed, transposition (3) with a central outlet opening (31), and two side sockets (31) extend toward the center of a rotary shaft (32;) ;
Said rotating plate (4) is substantially T-shaped, its vertical part (41) is inserted into the socket transposition (31) (3), the transverse portion (42) is located above the transposition (3), and turn two seat shaft (32) (3) transversely inserted into the shaft hole vertical portion (41) (41a) therein;
Further, the axial bore (41a) of said rotating plate (4) vertical portion (41) of the shaft (32) is provided with a torsion spring outer (5), one end of the torsion spring (5) (51) and the rotating plate (4) a shaft hole (41a) is connected to the inner side, the other end (52) and transposition (3) is connected to the transverse portion of the rotating plate (4) (41) can be centered on the rotary shaft (2) direction of the connecting block rotated and raised upward always have a tendency to turn the seat (3).
2. The connector of claim telescopic ladder set of claim 1, wherein: said transfer seat (3) formed by combining two left and right points transposition (3a) together, half turn seat (3a) through the bottom the boss (33) to be inserted between the junction (2) connected to the ring (1) and the connecting block.
3. The connector according to claim telescopic ladder set of claim 1 or 2, characterized in that: the thickness of the plate (4) the thickness of the transposase (3) adapted to the rotation.
4. The connector sleeve or telescopic ladder according to claim 1, wherein: said integrally rotating plate (4) is equal to a height greater than 2CM.
PCT/CN2010/000909 2010-03-17 2010-06-22 Connecting sleeve for extension ladder WO2011113183A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201010127269.8 2010-03-17
CN 201010127269 CN101798902B (en) 2010-03-17 2010-03-17 Connecting sleeve for extension ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100847652 EP2549054B1 (en) 2010-03-17 2010-06-22 Connecting sleeve for extension ladder

Publications (1)

Publication Number Publication Date
WO2011113183A1 true true WO2011113183A1 (en) 2011-09-22

Family

ID=42594729

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/000909 WO2011113183A1 (en) 2010-03-17 2010-06-22 Connecting sleeve for extension ladder

Country Status (3)

Country Link
EP (1) EP2549054B1 (en)
CN (1) CN101798902B (en)
WO (1) WO2011113183A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203186A (en) * 1987-03-28 1988-10-12 James Brotherton Ladder stabilizer and tensioner
CN2571986Y (en) * 2002-09-25 2003-09-10 王国华 Telescopic ladder
US20050139424A1 (en) * 2002-08-02 2005-06-30 Core Distribution, Inc. Extending ladder and associated manufacturing methods
CN2716479Y (en) 2004-02-06 2005-08-10 王万兴 Extension ladder
CN2804355Y (en) * 2005-06-24 2006-08-09 杨洪建 Telescopic ladder
US20070267252A1 (en) * 2006-05-17 2007-11-22 Kuo-Ching Yao Extension ladder with improved mechanism
CN201301661Y (en) * 2008-01-31 2009-09-02 沈孔南 A telescopic ladder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3542645B2 (en) * 1994-09-20 2004-07-14 隆 寺本 ladder
DE19653003C2 (en) * 1996-12-19 1999-05-27 Giesserei & Montage Gmbh collapsible ladder
JP4580346B2 (en) * 2006-01-13 2010-11-10 アルインコ株式会社 Telescopic ladder
CN201650097U (en) * 2010-03-17 2010-11-24 王万兴 Connecting sleeve for extension ladder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203186A (en) * 1987-03-28 1988-10-12 James Brotherton Ladder stabilizer and tensioner
US20050139424A1 (en) * 2002-08-02 2005-06-30 Core Distribution, Inc. Extending ladder and associated manufacturing methods
CN2571986Y (en) * 2002-09-25 2003-09-10 王国华 Telescopic ladder
CN2716479Y (en) 2004-02-06 2005-08-10 王万兴 Extension ladder
CN2804355Y (en) * 2005-06-24 2006-08-09 杨洪建 Telescopic ladder
US20070267252A1 (en) * 2006-05-17 2007-11-22 Kuo-Ching Yao Extension ladder with improved mechanism
CN201301661Y (en) * 2008-01-31 2009-09-02 沈孔南 A telescopic ladder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2549054A4 *

Also Published As

Publication number Publication date Type
EP2549054B1 (en) 2015-11-04 grant
EP2549054A4 (en) 2015-01-07 application
CN101798902B (en) 2013-02-06 grant
CN101798902A (en) 2010-08-11 application
EP2549054A1 (en) 2013-01-23 application

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