CN202866628U

CN202866628U - Telescopic ladder

Info

Publication number: CN202866628U
Application number: CN 201220535654
Authority: CN
Inventors: 陈肖玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-19
Filing date: 2012-10-19
Publication date: 2013-04-10
Anticipated expiration: 2022-10-19

Abstract

The utility model relates to a telescopic ladder, wherein two ladder rods are respectively formed by sleeving a plurality of telescopic sectioning rods sequentially; cross bars at each stage are mounted on the upper ends of the opposite two sectioning rods through connecting sleeves; inserting pins are arranged in the connecting sleeves; touching blocks for touching the telescopic actions of the inserting pins in the adjacent connecting sleeves at the superior stage; an unlocking switch is connected to the inserting pins and is propped against a vertical transmission rod; the lower end of the vertical transmission rod extends out of the lower end surfaces of the connecting sleeves; a sheath wrapped outside the extending end of the vertical transmission rod so to be prevent the bottom end of the vertical transmission rod from being exposed is arranged on the lower end surfaces of the connecting sleeves; and a guiding hole is formed on the sheath. When the telescopic ladder contracts, the touching blocks on the adjacent connecting sleeves at the lower stage extend into the guide hole to be propped against the lower end of the vertical transmission rod, so that the inserting pins contract back to the connecting sleeves to realize unlocking; and a hand clamping gap is formed between the two adjacent cross bars. The telescopic ladder can realize the unlocking in a touching manner and can also avoid the unlocking operation performed by mistake even if the unlocking mechanism is touched. Therefore, the telescopic ladder is safe and reliable in use.

Description

A kind of extension ladder

Technical field:

The utility model relates to a kind of extension ladder, belongs to ascending tool.

Background technology:

The applicant has applied for that before this patent No. is the extension ladder patent of CN201120411012.5, two terraced bars are socketed successively by the folding pole of Multi-section retractable respectively and form about it, every one-level strut rail then is installed between two relative poles by adapter sleeve, the spring that is provided with latch in the adapter sleeve and cooperates with latch, at least be provided with the first unlock switch in the second level and the strut rail more than the second level, the first unlock switch is by the Access Division, shaft and oblique shank form, shaft can be around self axis rotation, the Access Division is fastened in the groove of latch, tiltedly shank passes strut rail and stretches into one and is installed in the finger sheath of strut rail lower surface, be provided with a push rod of supporting mutually with the oblique lower surface of shank in the finger sheath, the push rod lower end exposes to the finger sheath, when the push rod lower end is touched to or is pressed and makes when moving on the push rod, the first unlock switch is touched and drives the latch transverse shifting and realize release;

Above-mentioned structure of telescopic ladder can be realized adjacent higher level's strut rail being touched after subordinate's strut rail release and support release, but also there is following deficiency: owing to exposing setting in order to touch the push rod lower end of supporting release, thereby in use easily cause to open by mistake and open, the operator is at the ladder stand period of the day from 11 p.m. to 1 a.m on the one hand, might collude because of carelessness the push rod lower end because of the foot of oneself causes to open by mistake and opens, children are when climbing person's periphery is played on the other hand, also may run into carelessly the push rod lower end and cause to open by mistake and open, so all can cause extension ladder to be collapsed suddenly and bring danger.Moreover push rod is arranged on the position that is close to the middle part on the strut rail, has increased especially in operator's climbing process to open by mistake the possibility that opens.

Summary of the invention:

Goal of the invention of the present utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of and realizes touch supporting release, and can avoid touching and support release mechanism and occur opening by mistake and open to guarantee to use safe extension ladder.

Goal of the invention of the present utility model realizes by following technical scheme:

A kind of extension ladder, comprise two terraced bars that are oppositely arranged and be arranged on multistage strut rail between two terraced bars, wherein two terraced bars are socketed successively by the pole of Multi-section retractable respectively and form, every one-level strut rail then is installed in two relative pole upper ends by adapter sleeve, be provided with latch in the described adapter sleeve, this latch can move and can be overhanging and up and down two joints that will be adjacent save rod lock together with respect to the adapter sleeve horizontal cross, be provided with on the described latch and make it keep the spring of overhanging trend, the upper surface of described adapter sleeve is provided with to touch the flexible shake-up piece of latch in adjacent higher level's adapter sleeve, be connected with a unlock switch on the described latch, described unlock switch is supported with the upper end of a vertical drive link and is connected, the lower surface of described adapter sleeve is stretched out in the lower end of described vertical drive link, be provided with on the lower surface of described adapter sleeve outside one and be wrapped in vertical drive link external part so that the sheath that does not expose its bottom, be provided with pilot hole on the described sheath, when extension ladder is collapsed, the bottom that shake-up piece on the described adjacent subordinate adapter sleeve stretches into this pilot hole and described vertical drive link is touched mutually and is supported, make described unlock switch drive latch and bounce back to realization release in the adapter sleeve, and between two adjacent joint strut rails, form a finger gap.

The inner surface of described sheath is provided with a crooked cambered surface progressively from top to bottom, so that the transverse width of this sheath diminishes from top to bottom gradually; The inner surface of described shake-up piece is provided with the cambered surface of indent progressively from bottom to top, so that should touch upper end width of piece less than the lower end width.

Be connected with an indication piece on the described latch, be provided with red and green two Warning Marks on the described indication piece, be provided with peephole on the front end face of described strut rail, when latch is overhanging when being in the lock state, described green Warning Mark is over against peephole, when the latch retraction was in released state, described red Warning Mark was over against peephole.

At least the front end face at subordinate strut rail is provided with push button, described push button links to each other with the latch of this grade strut rail, be provided with red and green two Warning Marks on the described latch, when push button dials to unlocked position, described green Warning Mark is hidden by push button, and described red Warning Mark exposes, when push button dials to latched position, described red Warning Mark is hidden by push button, and described green Warning Mark exposes.

Described pole adopts the elliptical tube structure.

The utility model has following advantage with respect to prior art:

At first, the vertical drive link lower end of be used for to touch supporting release in the utility model is by the sheath parcel and do not expose, thereby can avoid the operator to open opening by mistake of the ladder stand period of the day from 11 p.m. to 1 a.m, and opening by mistake in the time of also can avoiding children to play opened etc., thereby guaranteed the safety of using.

Secondly, the utility model will touch to release mechanism and be arranged on the adapter sleeve of strut rail both sides, because this position is away from the foot position of operator's ladder stand period of the day from 11 p.m. to 1 a.m, thereby can further prevent from opening by mistake and will open, and guarantee handling safety.

Description of drawings:

Fig. 1 is the structural representation of the utility model extension ladder deployed condition.

Fig. 2 is the structural representation of the utility model extension ladder contraction state.

Fig. 3 is the schematic top plan view of the utility model extension ladder.

Fig. 4 is the partial schematic sectional view of the utility model extension ladder deployed condition.

Fig. 5 is the partial schematic sectional view of the utility model extension ladder contraction state.

Fig. 6 is adapter sleeve and the upper schematic perspective view that supports release mechanism that touches thereof in the utility model.

The specific embodiment:

Such as Fig. 1～shown in Figure 6, as a kind of embodiment of the present utility model, this extension ladder comprises two terraced bars 1 that are oppositely arranged and is arranged on two multistage strut rails 2 between the terraced bar 1, wherein two terraced bars 1 are socketed successively by the pole 11 of Multi-section retractable respectively and form, and every one-level strut rail 2 then is installed in two relative pole 11 upper ends by adapter sleeve 3.Be provided with latch 4 in the adapter sleeve 3, this latch 4 can move and can be overhanging and up and down two joints that will be adjacent save bars 11 and lock together with respect to adapter sleeve 3 horizontal cross, is provided with on the latch 4 and makes its spring that keeps overhanging trend 5.The upper surface of adapter sleeve 3 is provided with to touch the shake-up piece 6 that adjacent higher level's adapter sleeve 3 interior latches 4 stretch, be connected with a unlock switch 7 on the latch 4, unlock switch 7 is supported with the upper end of a vertical drive link 8 and is connected, the lower surface that adapter sleeve 3 is stretched out in the lower end of vertical drive link 8, be provided with on the lower surface of adapter sleeve 3 outside one and be wrapped in vertical drive link 8 external parts so that the sheath 9 that does not expose its bottom, be provided with pilot hole 91 on the sheath 9, when extension ladder is collapsed, shake-up piece 6 on the adjacent subordinate adapter sleeve 3 stretches into this pilot hole 91 and touches mutually with the bottom of vertical drive link 8 and support, make unlock switch 7 drive latch latch 4 and bounce back to adapter sleeve 3 interior realization releases, and between adjacent two joint strut rails 2, form a finger gap 10, when preventing that the operator from using by hand folding.

The inner surface of sheath 9 is provided with a crooked cambered surface 92 progressively from top to bottom, so that the transverse width of this sheath 9 diminishes from top to bottom gradually; The inner surface that touches piece 6 is provided with the cambered surface 61 of indent progressively from bottom to top, so that should touch upper end width of piece 6 less than the lower end width.This design both can make to touch to go to touch in the pilot hole 91 that piece 6 stretches into sheath 9 exactly supports vertical drive link 8, in the time of preventing further again that the operator from using by hand folding.

Be connected with an indication piece 12 on the latch 4, be provided with red and green two Warning Marks 121,122 on the indication piece 12, be provided with peephole 20 on the front end face of strut rail 2, when latch 4 overhanging being in the lock state, green Warning Mark 122 is over against peephole 20, thereby informs that the current extension ladder of operator can climb use, when latch 4 retractions are in released state, red Warning Mark 121 is over against peephole 20, thereby informs that the current extension ladder of operator can not climb use.

Be provided with push button 21 on the front end face of subordinate strut rail 2, this push button 21 links to each other with the latch 4 of this grade strut rail 2, be provided with red and green two

Warning Marks

41,42 on the latch 4 of this grade strut rail 2, when push button 21 dials to unlocked position, green Warning Mark 42 is hidden by push button 21, and red Warning Mark 41 exposes, when push button 21 dials to latched position, red Warning Mark 41 is hidden by push button 21, and green Warning Mark 42 exposes.

Pole 11 adopts the elliptical tube structures, can increase so on the one hand the intensity of pole, and the weight capacity of raising extension ladder also can be avoided occurring skidding between the adjacent pole on the other hand, guarantees the stability that is connected between pole and the pole.

Above-described embodiment is only for illustration of the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that do not break away from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1. extension ladder, comprise two terraced bars that are oppositely arranged and be arranged on multistage strut rail between two terraced bars, wherein two terraced bars are socketed successively by the pole of Multi-section retractable respectively and form, every one-level strut rail then is installed in two relative pole upper ends by adapter sleeve, be provided with latch in the described adapter sleeve, this latch can move and can be overhanging and up and down two joints that will be adjacent save rod lock together with respect to the adapter sleeve horizontal cross, be provided with on the described latch and make it keep the spring of overhanging trend, it is characterized in that: the upper surface of described adapter sleeve is provided with to touch the flexible shake-up piece of latch in adjacent higher level's adapter sleeve, be connected with a unlock switch on the described latch, described unlock switch is supported with the upper end of a vertical drive link and is connected, the lower surface of described adapter sleeve is stretched out in the lower end of described vertical drive link, be provided with on the lower surface of described adapter sleeve outside one and be wrapped in vertical drive link external part so that the sheath that does not expose its bottom, be provided with pilot hole on the described sheath, when extension ladder is collapsed, the bottom that shake-up piece on the described adjacent subordinate adapter sleeve stretches into this pilot hole and described vertical drive link is touched mutually and is supported, make described unlock switch drive latch and bounce back to realization release in the adapter sleeve, and between two adjacent joint strut rails, form a finger gap.

2. a kind of extension ladder as claimed in claim 1 is characterized in that: the inner surface of described sheath is provided with a crooked cambered surface progressively from top to bottom, so that the transverse width of this sheath diminishes from top to bottom gradually; The inner surface of described shake-up piece is provided with the cambered surface of indent progressively from bottom to top, so that should touch upper end width of piece less than the lower end width.

3. a kind of extension ladder as claimed in claim 1 or 2, it is characterized in that: be connected with an indication piece on the described latch, be provided with red and green two Warning Marks on the described indication piece, be provided with peephole on the front end face of described strut rail, when latch is overhanging when being in the lock state, described green Warning Mark is over against peephole, and when the latch retraction was in released state, described red Warning Mark was over against peephole.

4. a kind of extension ladder as claimed in claim 1 or 2, it is characterized in that: the front end face at subordinate strut rail is provided with push button at least, described push button links to each other with the latch of this grade strut rail, be provided with red and green two Warning Marks on the described latch, when push button dialed to unlocked position, described green Warning Mark was hidden by push button, described red Warning Mark exposes, when push button dialed to latched position, described red Warning Mark was hidden by push button, and described green Warning Mark exposes.

5. a kind of extension ladder as claimed in claim 1 or 2 is characterized in that: described pole employing elliptical tube structure.