CN201507234U - One-way extension ladder - Google Patents
One-way extension ladder Download PDFInfo
- Publication number
- CN201507234U CN201507234U CN2009201985039U CN200920198503U CN201507234U CN 201507234 U CN201507234 U CN 201507234U CN 2009201985039 U CN2009201985039 U CN 2009201985039U CN 200920198503 U CN200920198503 U CN 200920198503U CN 201507234 U CN201507234 U CN 201507234U
- Authority
- CN
- China
- Prior art keywords
- pipe
- joint
- vertical block
- spring
- extension ladder
- 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
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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
- E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
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- Ladders (AREA)
Abstract
The utility model belongs to ladders, in particular to a one-way extension ladder, which comprises bottom feet, a vertical block and ledges, wherein the vertical block is formed by nesting plurality sections of pipes. The one-way extension ladder is characterized in that each section of the vertical block pipe is provided with a connecting base on which a taper angle is arranged, each section of the ledge is provided with a joint in which a bolt is mounted, one end of the bolt is connected with a spring provided with a spring lid, spacing pieces are mounted on the pipe wall of the vertical block, the upper part of the section of pipe at the top end is connected with a retractable switch via one joint, the retractable switch is provided with a torsion spring and a mandrel, and a cam is mounted at the lower part of the section of pipe at the top end of the vertical block and is connected with the bottom end of the mandrel. When the ladder is used, the retractable switch is rotated, and the bolt is popped out via the cam and propped back by other pipes thereunder through the taper angles of the connecting bases, therefore, the one-way extension ladder has flexile expansion and contraction, convenient storage and carrying, small size, and low probability of pressing the hands during the expansion and contraction.
Description
Technical field
The utility model belongs to the ladder class, specifically is a kind of unidirectional extension ladder.
Background technology
Often need high-rise working in fields such as fire-fighting, electric industry, post and telecommunications, building, geology, forestry at present, the common tool of high-rise working is a ladder, and ladder also is a kind of essential life appliance in town-dweller-rural-family.Existing common ladder usually is wooden, is an overall fixed structure, and volume is big, carry inconvenience, and easy aluminium alloys folding ladder is because structure is reasonable inadequately on the market, and folding convenient inadequately, volume after folding is still bigger, and is also perfect not enough on the profile.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, a kind of more reasonable structure is provided, uses unidirectional extension ladder more attractive in appearance behind more convenient, the telescopic folding.
The technical solution of the utility model is as follows:
A kind of unidirectional extension ladder, comprise footing, upright shelves, crosspiece, upright shelves are formed by more piece pipe suit, it is characterized in that: the upright shelves of each joint pipe all is equipped with the connection base, connect base and be provided with taper angle, each saves joint is housed on the crosspiece, the latch of packing in the joint, latch one end connects spring, and spring has spring cup, adorns banking stop on the upright shelves tube wall, the top of one pipe joint connects flexible switch by joint on the top, flexible switch has torsion spring and plug, and cam is equipped with in the bottom of upright shelves top one pipe joint, and cam links to each other with the plug bottom.
Upright shelves pipe of the present utility model can be pipe or square tube.
When the utility model uses, the rotary extension switch, upright shelves first segment pipe backs down latch by cam, and the remaining tubing of below is then pushed up back latch by the taper angle that connects base, thereby can stretch neatly, it is spacing when banking stop is run into joint, upright shelves pipe be can not pull, and this ladder is scalable, is convenient to deposit carry, volume is little, and is difficult for being pressed onto hand when flexible.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is an A portion enlarged drawing.
The specific embodiment
As Fig. 1, shown in 2, a kind of unidirectional extension ladder, comprise footing 13, upright shelves 12, crosspiece 11, upright shelves 12 are formed by more piece pipe suit, it is characterized in that: the upright shelves of each joint pipe all is equipped with and connects base 6, connect base 6 and be provided with taper angle, each saves joint 2 on the crosspiece 11, the latch 9 of packing on the joint, and latch one end connects spring 8, spring 8 has spring cup 7, on the upright shelves tube wall banking stop 10 is housed, the top of one pipe joint connects flexible switch 1 by joint 2 on the top, and flexible switch 1 has torsion spring 3 and plug 4, cam 5 is equipped with in the bottom of top one pipe joint, and cam 5 links to each other with plug 4 bottoms.
Taper angle of the present utility model can one or two.
Upright shelves pipe of the present utility model can be pipe or square tube.
The utility model rotary extension switch 1 is rejected the latch 9 of first segment crosspiece by cam 5, and remaining hits back latch 9 by the taper angle that connects base, thereby can stretch neatly.
Crosspiece of the present utility model, upright shelves are made by aluminium alloys, and connecting base can be made by polyamide or polyformaldehyde.
Claims (1)
1. unidirectional extension ladder, comprise footing, upright shelves, crosspiece, upright shelves are formed by more piece pipe suit, it is characterized in that: the upright shelves of each joint pipe all is equipped with the connection base, connect base and be provided with taper angle, each saves joint is housed on the crosspiece, the latch of packing in the joint, latch one end connects spring, and spring has spring cup, adorns banking stop on the upright shelves tube wall, the top of one pipe joint connects flexible switch by joint on the top, flexible switch has torsion spring and plug, and cam is equipped with in the bottom of upright shelves top one pipe joint, and cam links to each other with the plug bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201985039U CN201507234U (en) | 2009-09-30 | 2009-09-30 | One-way extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201985039U CN201507234U (en) | 2009-09-30 | 2009-09-30 | One-way extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201507234U true CN201507234U (en) | 2010-06-16 |
Family
ID=42468362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201985039U Expired - Fee Related CN201507234U (en) | 2009-09-30 | 2009-09-30 | One-way extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201507234U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2496670A (en) * | 2011-11-21 | 2013-05-22 | Kehai Zhou | Telescopic ladder |
| CN103573177A (en) * | 2013-11-25 | 2014-02-12 | 国家电网公司 | Insulating cat ladder used for personnel to carry out secondary overhauling operation on 10 KV standard transformer platform |
| CN109322419A (en) * | 2018-11-22 | 2019-02-12 | 安徽工程大学 | A kind of stage acoustic reflection cover |
-
2009
- 2009-09-30 CN CN2009201985039U patent/CN201507234U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2496670A (en) * | 2011-11-21 | 2013-05-22 | Kehai Zhou | Telescopic ladder |
| CN103573177A (en) * | 2013-11-25 | 2014-02-12 | 国家电网公司 | Insulating cat ladder used for personnel to carry out secondary overhauling operation on 10 KV standard transformer platform |
| CN103573177B (en) * | 2013-11-25 | 2016-03-16 | 国家电网公司 | 10 kilovolts of standardization transformer platform secondary upkeep operation personnel insulating ladders |
| CN109322419A (en) * | 2018-11-22 | 2019-02-12 | 安徽工程大学 | A kind of stage acoustic reflection cover |
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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: 20100616 Termination date: 20100930 |