CN101798902B

CN101798902B - A connecting sleeve for telescopic ladder

Info

Publication number: CN101798902B
Application number: CN 201010127269
Authority: CN
Inventors: 王万兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-17
Filing date: 2010-03-17
Publication date: 2013-02-06
Anticipated expiration: 2030-03-17
Also published as: EP2549054A1; CN101798902A; EP2549054B1; WO2011113183A1; EP2549054A4

Abstract

The invention discloses a connecting sleeve for an extension ladder, which comprises a connecting ring (1) and a connecting block (2) which are connected into a whole body; a rotary seat (3) and a rotating plate (4) are arranged on the surface of the joint of the connecting ring (1) and the connecting block (2); the rotary seat (3) is fixed relative to the connecting ring (1); a faucet (31) is arranged at the center of the rotary seat (3); two sides of the faucet (31) respectively extend toward the center to have a rotating shaft (32); the vertical part (41) of the rotating plate (4) is inserted into the faucet (31); and a torsional spring (5) is arranged outside the rotating shaft (32) and enables the transverse part (41) of the rotating plate (4) to move towards the connecting block (2) by taking the rotating shaft as the center and to have the tendency of erecting above the rotary seat (3). Compared with the prior art, the connecting sleeve has the advantages that when the connecting sleeve is in normal use, due to the separation of the rotating plate, the distance between the upper rail and the lower rail of the extension ladder is constant so as to hold fingers, so the connecting sleeve can effectively prevent the rail at the upper part from pressing the fingers on the lower rail when furling the extension ladder, and when the extension ladder is packaged for transportation, the overall height of the ladder can not be too high.

Description

A kind of adapter sleeve for extension ladder

Technical field

The present invention relates to the technical field of extension ladder, relate in particular to a kind of adapter sleeve for extension ladder.

Background technology

Ladder is quite extensive in the use in building, finishing, advertisement, home dwelling field.At present, more welcome on the market is the extension ladder that can stretch up and down, and it can shorten and be easy to take in, carry when not using.Be the formerly patent " a kind of telescopic ladder " of ZL200420091638.2 (notification number is CN2716479Y) such as the patent No., disclose so a kind of extension ladder, it comprises cross bar and montant, montant is that several sections of sleeve pipe telescopicallies are socketed to form, many cross bars place between the two relative montants, be respectively arranged with telescopic pivot pin at the two ends of every cross bar, this pivot pin is respectively with to open in sleeve pipe the positioning jack corresponding with it suitable, be equipped with annular adapter sleeve in every joint sleeve pipe upper end, and this adapter sleeve and cross bar link together.This extension ladder in use owing to there not be fixing space between the upper sheer pole, and user's both hands are generally just held up on a certain cross bar, when drawing extension ladder in, there is unsafe hidden danger in the finger below the cross bar of top can be pressed onto and be shelved on the cross bar.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of adapter sleeve for extension ladder for the present situation of prior art, it makes has fixing spacing between the sheer pole, when preventing that effectively extension ladder from drawing in, cross bar is pressed onto finger, and during packing of product transportation, whole height again can be not too high, is very suitable for actual use.

The present invention solves the problems of the technologies described above the technical scheme that adopts: the adapter sleeve that should be used for extension ladder, comprise the connecting ring and the contiguous block that are connected as a single entity, it is characterized in that: the surface, junction between connecting ring and contiguous block is provided with a swivel base and rotor plate;

Wherein, the relative connecting ring of described swivel base is fixed, and swivel base central authorities have socket, and the dual-side of socket is extended with a rotating shaft to central authorities respectively;

It is T-shaped that described rotor plate is substantially, and it vertically partly is inserted in the socket of swivel base, and its lateral part is positioned on the swivel base, and two rotating shafts on the swivel base laterally are inserted in the axis hole of vertical part;

And, the axis hole of the vertical part of described rotor plate is interior, rotating shaft is outside equipped with a torsion spring, one end of this torsion spring and the axis hole of rotor plate be inboard to link to each other, the other end links to each other with swivel base, and make the lateral part of rotor plate can be centered by rotating shaft to the rotation of contiguous block direction and have all the time the trend that erects above the swivel base.

It is outer and link to each other with montant that above-mentioned connecting ring is set in the sleeve pipe of corresponding montant, and it is interior and link to each other with cross bar that the contiguous block end is inserted into cross bar.

For further guaranteeing the both hands that can effectively protect the user that arrange of swivel base and rotor plate, the height of described rotor plate is greater than the thickness of finger.

For ease of component assemble, described swivel base can by about two minutes swivel bases be spliced, the bottom of minute swivel base plugs on the junction between connecting ring and the contiguous block by projection.

As further improvement, it is trapezoidal that the lateral part of described rotor plate can be, so, the top of lateral part have horizontal surface and be convenient to cross bar bottom, top against, the thickness of rotor plate and the thickness of swivel base adapt, so, when rotor plate was erect, itself and swivel base consisted of an integral body, and the surface is clean and tidy, the lateral part folding of rotor plate is poured on swivel base one rear flank, and the surface of rotor plate flushes with the top surface of swivel base substantially.

For guaranteeing that rotor plate can protect finger when holding up, the whole height of described rotor plate take more than or equal to 2CM as good.

Compared with prior art, the invention has the advantages that: pass through swivel base, rotor plate and the setting of torsion spring between the two, make the lateral part of rotor plate can be centered by rotating shaft, rotate relative to swivel base and adapter sleeve itself, when extension ladder normally uses, because rotor plate all the time relative swivel base upwards erects, be separated by and have fixing spacing owing to rotor plate between the upper sheer pole, this spacing can be held finger, and when preventing that effectively extension ladder from drawing in, the cross bar of top is pressed onto the finger that is positioned on the cross bar of below, and, when the extension ladder packed and transported, the lateral part folding of rotor plate can be fallen, be positioned at a side of swivel base, so, this spacing of height of only having swivel base between the upper sheer pole, when making packing of product transportation, whole height again can be not too high, is very suitable for actual use.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 is the embodiment of the invention rolls over state at rotor plate structural representation;

Fig. 3 is the three-dimensional exploded view of the embodiment of the invention.

The specific embodiment

Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.

Application has the extension ladder of the embodiment of the invention, comprise two montants that are oppositely arranged and be fixed on many cross bars between two montants, montant comprises that the telescopic internal and external casing of two joints is socketed to form, between two relative sleeve pipes with joint, be fixed with a cross bar, and the two ends of each cross bar are relative fixing with the sleeve pipe of corresponding montant by the adapter sleeve of the embodiment of the invention;

Such as Fig. 1, Fig. 2 and shown in Figure 3, should be used for the adapter sleeve of extension ladder, comprise the connecting ring 1 and the contiguous block 2 that are connected as a single entity, the surface, junction between connecting ring 1 and contiguous block 2 is provided with a swivel base 3 and rotor plate 4;

Wherein, connecting ring 1 is sheathed fixing with the sleeve pipe of corresponding montant, and contiguous block 2 plugs in the end of corresponding cross bar;

Described swivel base 3 by about two minutes swivel base 3a be spliced, divide swivel base 3a to plug connecting ring 1 one sides by the projection 33 of bottom, thereby connecting ring 1 is fixing relatively, swivel base 3 central authorities have socket 31, and the dual-side of socket 31 is extended with a rotating shaft 32 to central authorities respectively;

Described rotor plate 4 is T-shaped substantially, and its whole height is 3CM, and its vertical part 41 is inserted in the socket 31 of swivel base 3, and its lateral part 42 is trapezoidal and is positioned on the swivel base 3, and the thickness of the thickness of rotor plate 4 and swivel base 3 is basic identical;

Two rotating shafts 32 on the swivel base 3 laterally are inserted in the axis hole 41a of vertical part 41, and the lateral part 42 of this rotor plate 4 can be rotated around this rotating shaft 32, and make the lateral part 42 of rotor plate 4 turn to a side of swivel base 2, and also, contiguous block 2 foldings fall relatively;

And, in the axis hole 41a of described rotor plate 4 vertical parts 41, rotating shaft 32 is outside equipped with a torsion spring 5, one end 51 of this torsion spring 5 links to each other with the axis hole 41a of rotor plate 4 is inboard, the other end 52 links to each other with swivel base 3, and the lateral part 42 that makes rotor plate 4 can be centered by rotating shaft 32 be rotated and is had all the time the trend that erects to swivel base 3 tops to contiguous block 2 directions, also be, in situation about applying without external force, the lateral part 42 of rotor plate 4 all the time up, when practical application, make between the upper sheer pole of extension ladder and be separated by by whole rotor plate 4 and swivel base 3, only have the lateral part 42 of rotor plate 4 applying in the situation of external force, could fall towards contiguous block 2 foldings, make between the sheer pole and only be separated by by this swivel base 3.

Claims

1. adapter sleeve that is used for extension ladder, comprise the connecting ring (1) and the contiguous block (2) that are connected as a single entity, it is characterized in that: the surface, junction between connecting ring (1) and contiguous block (2) is provided with a swivel base (3) and rotor plate (4);

Wherein, described swivel base (3) relatively connecting ring (1) is fixing, and swivel base (3) central authorities have socket (31), and the dual-side of socket (31) is extended with a rotating shaft (32) to central authorities respectively;

Described rotor plate (4) is T-shaped substantially, its vertical part (41) is inserted in the socket (31) of swivel base (3), its lateral part (42) is positioned on the swivel base (3), and two rotating shafts (32) on the swivel base (3) laterally are inserted in the axis hole (41a) of vertical part (41);

And, the axis hole (41a) of the vertical part of described rotor plate (4) (41) is interior, rotating shaft (32) is outside equipped with a torsion spring (5), one end (51) of this torsion spring (5) and the axis hole (41a) of rotor plate (4) be inboard to link to each other, the other end (52) links to each other with swivel base (3), and make the lateral part (42) of rotor plate (4) can be centered by rotating shaft to the rotation of contiguous block (2) direction and have all the time the trend that erects above the swivel base (3).

2. the adapter sleeve for extension ladder according to claim 1, it is characterized in that: described swivel base (3) by about two minutes swivel base (3a) be spliced, minute swivel base (3a) projection (33) by the bottom plugs on the junction between connecting ring (1) and the contiguous block (2).

3. the adapter sleeve for extension ladder according to claim 1 and 2, it is characterized in that: the thickness of the thickness of described rotor plate (4) and swivel base (3) adapts.

4. the adapter sleeve for extension ladder according to claim 1 and 2, it is characterized in that: the whole height of described rotor plate (4) is more than or equal to 2CM.