CN202300171U - Extending ladder - Google Patents
Extending ladder Download PDFInfo
- Publication number
- CN202300171U CN202300171U CN2011204376472U CN201120437647U CN202300171U CN 202300171 U CN202300171 U CN 202300171U CN 2011204376472 U CN2011204376472 U CN 2011204376472U CN 201120437647 U CN201120437647 U CN 201120437647U CN 202300171 U CN202300171 U CN 202300171U
- Authority
- CN
- China
- Prior art keywords
- joint
- section
- ladder
- convex rib
- rods
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Ladders (AREA)
Abstract
The utility model discloses an extending ladder which comprises two oppositely-arranged ladder rods and multiple stages of ledges arranged between the two ladder rods, wherein the two ladder rods are formed in the way that multiple sections of flexible and foldable section rods are nested in sequence; each stage of ledge is installed between the two opposite section rod by a connecting sleeve; in the two adjacent sections of section rods, the lower end of the previous section of section rod is provided with a cushion collar; the inner wall of the next section of section rod is provided with a stop tendon matched with the cushion collar in a stop mode; the next section of the section rod is also provided with a spacing convex tendon which is arranged on the inner wall of the upper end of the top tendon; and the spacing convex tendon can perform the radial limiting action on the previous section of section rod in the expanding process of the previous section of section rod. In the structure, the radial limiting action of the spacing convex tendon shortens error transferring distance, the swinging amplitude of the section rod is furthest reduced so as to ensure the use safety and the expanding reliability of the expanding ladder.
Description
Technical field:
The utility model relates to a kind of extension ladder, belongs to the instrument of ascending a height.
Background technology:
Extension ladder is used widely owing to its telescopic convenience at present.During use, each pole of extension ladder is upwards opened, and locks according to the latch of crosspiece both sides; And in two adjacent joint joint bars, the bottom of a last joint joint bar is equipped with cushion collar, and the inwall of next joint joint bar is provided with the backstop muscle; The backstop muscle can carry out axial limiting to cushion collar, and radially spacing to the bottom of a last joint joint bar, but because this radially spacing position is too low; Cause the distance of error propagation longer, in the use, swing by a relatively large margin can appear in the upper end of a last joint joint bar; So, not only crisis operator safety in use, and influenced the flexible reliability of extension ladder.
Summary of the invention:
The goal of the invention of the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of and shortens error propagation distance, minimizing pole amplitude of fluctuation, and guarantee safe in utilization and flexible reliable extension ladder.
The utility model is realized by following technical scheme:
A kind of extension ladder; Comprise two terraced bars that are oppositely arranged and be arranged on the multistage crosspiece between two terraced bars; Wherein two terraced bars are made up of the pole of more piece telescopic folding socket successively respectively, and each grade crosspiece then is installed between two relative poles by adapter sleeve; In two adjacent joint joint bars; The lower end of a last joint joint bar is equipped with cushion collar; The inwall of next joint joint bar is provided with the backstop muscle that cooperates with this cushion collar backstop; Said next joint joint bar also is provided with a retaining convex rib on the inwall that is positioned at backstop muscle upper end, this retaining convex rib can play radially spacing effect to a last joint joint bar in a last joint joint bar telescopic process.
Said retaining convex rib is positioned at the adapter sleeve that is connected with this joint joint bar upper end.
Said retaining convex rib is adjacent to the adapter sleeve setting that is connected with this joint joint bar upper end.
Said retaining convex rib ringwise.
The utility model has following advantage with respect to prior art:
The utility model has increased a radially spacing position between adjacent two joint joint bars; And with move on on this radially spacing position with adapter sleeve that next joint joint bar is connected in; Thereby shortened the error propagation distance between a radially spacing position and the last joint joint bar upper end; Farthest reduce the amplitude of fluctuation of a last joint joint bar, and and then guaranteed the safety and flexible reliability that extension ladder uses.
Description of drawings:
Fig. 1 is the sketch map of a kind of preferred enforcement structure of the utility model extension ladder.
Fig. 2 is the enlarged diagram at A place among Fig. 1.
The specific embodiment:
As shown in Figure 1; A kind of preferred embodiment as the utility model; This extension ladder comprises two terraced bars 1 that are oppositely arranged and is arranged on two multistage crosspieces 2 between the terraced bar 1; Wherein two terraced bars 1 are made up of the pole 11 of more piece telescopic folding socket successively respectively, and each grade crosspiece 2 then is installed between two relative poles 11 by adapter sleeve 3.In adjacent two joint joint bars 11, the lower end of last a joint joint bar 11 is equipped with cushion collar 4, and the inwall that next joint saves bar 11 is provided with the backstop muscle 5 that cooperates with these cushion collar 4 backstops; Next joint joint bar 11 with adapter sleeve 3 that this joint joint bar upper end is connected in be provided with a retaining convex rib 6, this retaining convex rib 6 can save in bar 11 telescopic process at a last joint, saves bar 11 to last one and play radially spacing effect.
Said retaining convex rib 6 can increase radially spacing area ringwise like this.
As the another kind of embodiment of the utility model, its difference is that retaining convex rib 6 is adjacent to the adapter sleeve 3 that is connected with this joint joint bar upper end to be provided with.
The foregoing description only supplies to explain the usefulness of the utility model; And be not the restriction to the utility model; The those of ordinary skill in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to the category of the utility model, and the scope of patent protection of the utility model should be limited each claim.
Claims (4)
1. extension ladder; Comprise two terraced bars that are oppositely arranged and be arranged on the multistage crosspiece between two terraced bars; Wherein two terraced bars are made up of the pole of more piece telescopic folding socket successively respectively, and each grade crosspiece then is installed between two relative poles by adapter sleeve; In two adjacent joint joint bars; The lower end of a last joint joint bar is equipped with cushion collar; The inwall of next joint joint bar is provided with the backstop muscle that cooperates with this cushion collar backstop; It is characterized in that: said next joint joint bar also is provided with a retaining convex rib on the inwall that is positioned at backstop muscle upper end, and this retaining convex rib can play radially spacing effect to a last joint joint bar in a last joint joint bar telescopic process.
2. a kind of extension ladder as claimed in claim 1 is characterized in that: said retaining convex rib is positioned at the adapter sleeve that is connected with this joint joint bar upper end.
3. a kind of extension ladder as claimed in claim 1 is characterized in that: said retaining convex rib is adjacent to the adapter sleeve setting that is connected with this joint joint bar upper end.
4. like claim 1 or 2 or 3 described a kind of extension ladders, it is characterized in that: said retaining convex rib ringwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204376472U CN202300171U (en) | 2011-11-08 | 2011-11-08 | Extending ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204376472U CN202300171U (en) | 2011-11-08 | 2011-11-08 | Extending ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300171U true CN202300171U (en) | 2012-07-04 |
Family
ID=46369093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204376472U Expired - Fee Related CN202300171U (en) | 2011-11-08 | 2011-11-08 | Extending ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300171U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869763A (en) * | 2017-03-20 | 2017-06-20 | 无锡市龙海杰机械制造有限公司 | Possesses the cat ladder of regulation treadle spacing |
-
2011
- 2011-11-08 CN CN2011204376472U patent/CN202300171U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869763A (en) * | 2017-03-20 | 2017-06-20 | 无锡市龙海杰机械制造有限公司 | Possesses the cat ladder of regulation treadle spacing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204024004U (en) | A kind of scaffold take dismantling device fast | |
| CN104314299A (en) | Foldable hanging basket | |
| CN202300171U (en) | Extending ladder | |
| CN205225064U (en) | Portable ladder warp | |
| CN203188584U (en) | Scaffold for building template engineering construction | |
| CN205691118U (en) | A kind of mapping support means | |
| CN204017245U (en) | There is the trampoline of Multi-functional slides | |
| CN204212385U (en) | Scaffold strengthened by truss | |
| CN205137488U (en) | Chimney integral type clamp support | |
| CN205577106U (en) | Well roof beam is directly shelved in capital formula beam column articulation node | |
| CN205875766U (en) | Regularization roofing protective structure | |
| CN201176847Y (en) | Telescopic herringbone ladder | |
| CN207469890U (en) | A kind of foundation pit guardrail of construction | |
| CN206443487U (en) | Family, inside and outside folding bed case overhead guard structure | |
| CN202053828U (en) | Extensible wheel | |
| CN204754262U (en) | Folding combined railing structure | |
| CN203735872U (en) | Vertical type folding support | |
| CN204002507U (en) | A kind of foldable ladder | |
| CN204023610U (en) | A kind of cylindrical foundation simple platform be removably installed | |
| CN204940836U (en) | A kind of scaffold fastenings | |
| CN204246847U (en) | Triangle hurdles rack | |
| CN204139692U (en) | A kind of steel tube tower | |
| CN203320694U (en) | Portable climbing frame | |
| CN202755877U (en) | Combined ladder used for underground mine cutting patio operation | |
| CN202483428U (en) | Modified telescopic ladder shrink-proof blocking structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20131108 |