CN205840753U - A kind of safety extension ladder - Google Patents
A kind of safety extension ladder Download PDFInfo
- Publication number
- CN205840753U CN205840753U CN201620682512.5U CN201620682512U CN205840753U CN 205840753 U CN205840753 U CN 205840753U CN 201620682512 U CN201620682512 U CN 201620682512U CN 205840753 U CN205840753 U CN 205840753U
- Authority
- CN
- China
- Prior art keywords
- movable disk
- joint
- fixing seat
- air
- bar
- 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
Landscapes
- Ladders (AREA)
Abstract
The utility model discloses a kind of safety extension ladder, include two ladder bars the most vertically arranged, each ladder bars is telescopically socketed by more piece pole and forms, feature is to be provided with Buffer Unit at the lower ending opening of often joint joint bar, Buffer Unit includes fixing seat and movable disk, fixing seat is fixing with upper joint joint bar to be connected, it is provided with the first sealing ring between fixing seat and upper joint joint bar, the bottom of fixing seat is provided with air-flow post, the height of air-flow post is more than the height of movable disk, movable disk is set on air-flow post and slides up and down with it and coordinates, it is provided with gap between movable disk and air-flow post, the gasket seal suitable with gap it is arranged with on air-flow post, the bottom of air-flow post is fixedly installed movable disk banking stop, in being placed on lower joint joint bar in movable disk and slide up and down with it and coordinate, it is provided with the second sealing ring between movable disk and lower joint joint bar；Advantage is to delay pole to decline the speed drawn in, therefore reaches the purpose avoiding injuring user finger by a crashing object, eliminate safe hidden trouble.
Description
Technical field
This utility model relates to a kind of extension ladder, especially relates to a kind of safety extension ladder.
Background technology
Extension ladder is to pull open elongation during a kind of use, and the used time can not draw the ladder shortening the operation of ascending a height deposited in.Stretch
Ladder can be extended by contracting ladder in use, and is got up by ladder collapses when collection.Extension ladder of the prior art, promotion is pressed
After button unlocks, ladder declines gathering by deadweight, owing to resistance suffered during the decline of ladder is the least, respectively
Level ladder portion can quickly decline gathering, and as user both hands help position improper, finger is placed exactly between two cross bars, holds
The crosspiece of extension ladder is easily occurred to crush or injure the security incident of user finger by a crashing object, the rapid decrease of ladder, cause jamming a finger
Situation more serious.If extension ladder can be made to decline, that the speed drawn in becomes is slow, then just reduce crosspiece and crush or injure by a crashing object and make
The security incident of user's finger, the most existing structure of telescopic ladder can be further improved.
Summary of the invention
Technical problem to be solved in the utility model is to provide the safety extension ladder of a kind of finger, when declining gathering
Speed is slow, can be prevented effectively from user and is crushed by crosspiece or injure finger by a crashing object, it is ensured that safety in utilization.
The technical scheme that the above-mentioned technical problem of this utility model solution is used is: a kind of safety extension ladder, includes two
The ladder bars that root is the most vertically arranged, each ladder bars is telescopically socketed by more piece pole and forms, often equal at the lower ending opening of joint joint bar
Being provided with Buffer Unit, described Buffer Unit includes fixing seat and movable disk, and described fixing seat is fixing even with upper joint joint bar
Connecing, be provided with the first sealing ring between described fixing seat and upper joint joint bar, the bottom of described fixing seat is provided with air-flow post,
The height of described air-flow post more than the height of described movable disk, described movable disk be set on described air-flow post and with
It slides up and down cooperation, is provided with gap, described air-flow post is arranged with between described movable disk and described air-flow post
The gasket seal suitable with described gap, the bottom of described air-flow post is fixedly installed movable disk banking stop, described
In being placed on lower joint joint bar in movable disk and slide up and down with it and coordinate, between described movable disk and lower joint joint bar, be provided with second
Sealing ring.
Further preferred scheme of the present utility model is: offer the first pilot hole, described on described fixing seat
It is provided with steady pin in one pilot hole, upper joint joint bar offers second assembling corresponding with the first described pilot hole position
Hole, described steady pin through after described the second pilot hole, the first described pilot hole by described fixing seat with upper successively
Bar is fixed, it is ensured that firm between fixing seat with upper joint joint bar is connected, and simultaneously facilitates assembling.
Further preferred scheme of the present utility model is: be provided with assembly bench, the end of upper joint joint bar on described fixing seat
Portion is placed on described assembly bench, and described fixing seat offers the first seal groove, and the first described sealing ring is set in
The inwall saving bar in the first described seal groove and with upper joint is adjacent to, and forms the space of a relative closure in making joint joint bar,
Guarantee that buffering when declining between upper joint joint bar and lower joint joint bar is slidably matched.
Further preferred scheme of the present utility model is: the top of described air-flow post offers pad back-up ring, described
Gasket seal is set in above described pad back-up ring, it is ensured that the matching relationship between gasket seal and gap.
Further preferred scheme of the present utility model is: offer the second seal groove, described in described movable disk
The inwall saving bar in two sealing rings are set in the second described seal groove and with lower joint is adjacent to, and forms a phase in making lower joint joint bar
To the space closed, it is ensured that buffering when declining between upper joint joint bar and lower joint joint bar is slidably matched.
Further preferred scheme of the present utility model is: offer first segment discharge orifice on described fixing seat, it is ensured that joint
Stretching smoothly between bar.
Further preferred scheme of the present utility model is: offer second section discharge orifice in described movable disk, it is ensured that joint
Stretching smoothly between bar.
Compared with prior art, the utility model has the advantage of often joint joint bar bottom equipped with Buffer Unit, adjacent two
Forming the space of relative closure between Buffer Unit on joint joint bar, during upper joint joint bar declines, gasket seal touch work
Moving plate end face thus block gap, the fixing seat on upper joint joint bar can run into closes the resistance of gas in space, and gas can only be from
The gap of each parts of extension ladder is flowed out, therefore pole can be delayed to decline the speed drawn in, owing to decrease speed is slow, people can be given enough
Response time, therefore reach the purpose avoiding injuring user finger by a crashing object, eliminate safe hidden trouble；At upper joint joint bar uphill process
In, gasket seal separates with movable disk cannot block gap, and lower joint joint bar passes through the gap between movable disk and air-flow post with upper
Air flue is formed, it is ensured that extension ladder can be laborsaving when stretching between the outer wall of joint joint bar.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation in this utility model during upper joint joint bar decline；
Fig. 3 is the partial enlarged drawing in Fig. 2 at A；
Fig. 4 is the structural representation in this utility model in upper joint joint bar uphill process；
Fig. 5 is the partial enlarged drawing in Fig. 4 at B；
Fig. 6 is the structural representation of Buffer Unit in this utility model；
Fig. 7 is the explosive view of Fig. 6.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
As it can be seen, a kind of safety extension ladder, including two ladder bars the most vertically arranged, each ladder bars is by more piece pole
1 is telescopically socketed composition, is often provided with Buffer Unit at the lower ending opening of joint joint bar 1, and Buffer Unit includes fixing seat 2 He
Movable disk 3, fixing seat 2 is fixing with upper joint joint bar 1a to be connected, and is provided with the first sealing ring between fixing seat 2 and upper joint joint bar 1a
21, the bottom of fixing seat 2 is provided with air-flow post 22, and the height of air-flow post 22 is more than the height of movable disk 3, and movable disk 3 is set in
Slide up and down on air-flow post 22 and with it and coordinate, between movable disk 3 and air-flow post 22, be provided with gap 4, sheathed on air-flow post 22
Having the gasket seal 221 suitable with gap 4, the bottom of air-flow post 22 is fixedly installed movable disk banking stop 5, and movable disk is spacing
Sheet 5 is fixed on the bottom of air-flow post 22 by bolt 7, offers limited step 34 bottom movable disk 3, movable disk banking stop 5 with
Limited step 34 is suitable, and movable disk banking stop 5 is square and cannot block gap 4, be placed in movable disk 3 lower joint joint bar 1b in also
Slide up and down with it and coordinate, between movable disk 3 and lower joint joint bar 1b, be provided with the second sealing ring 31, fixing seat 2 offers the
One pilot hole 23, is provided with steady pin 24, upper joint joint bar 1a offers and the first pilot hole 23 position in the first pilot hole 23
The second corresponding pilot hole 11, steady pin 24 through after second pilot hole the 11, first pilot hole 23 by fixing seat 2 with upper successively
Bar 1a fixes, and fixing seat 2 is provided with assembly bench 25, and the bottom of upper joint joint bar 1a is placed on assembly bench 25, and fixing seat 2 is opened
Being provided with the first seal groove 26, the inwall saving bar 1a in the first sealing ring 21 is set in the first seal groove 26 and with upper joint is adjacent to, gas
The top of fluidization tower 22 offers pad back-up ring 6, and gasket seal is set in above pad back-up ring 6, movable disk 3 offers second close
Sealing groove 32, the inwall saving bar 1b in the second sealing ring 31 is set in the second seal groove 32 and with lower joint is adjacent to, and fixing seat 2 is offered
There is first segment discharge orifice 27, movable disk 3 offers second section discharge orifice 33.
Operation principle: ladder is when drawing (decline process) in, and bar 1b inwall is close joins for the second sealing ring 31 and lower joint joint, generation
Certain air-flow, when air-flow recoils, upwards boosts movable disk 3 so that movable disk 3 closes with gasket seal 221, just produces
One air-flow, holds up upper joint joint bar 1a so that it is decline and be slowed by, owing to offering first segment discharge orifice 27 on fixing seat 2, movable
Offer second section discharge orifice 33 on dish 3, the decrease speed of ladder can be controlled by first segment discharge orifice 27 and second section discharge orifice 33,
When ladder opens (uphill process), the second sealing ring 31 is against the frictional force between lower joint joint bar 1b inwall, and second seals
Circle 31 separates with gasket seal 221, makes air-flow above pass through the gap between movable disk 3 and fixing seat 2, then through movable disk
It is following that gap 4 between 3 and air-flow post 22 makes air-flow extend through, and very easily just can open ladder, thus play safe guarantor
The effect protected.
Above a kind of safety extension ladder provided by the utility model is described in detail, used herein specifically
Principle of the present utility model and embodiment are set forth by individual example, and the explanation of above example is only intended to help to understand this
Utility model and core concept.It should be pointed out that, for those skilled in the art, new without departing from this practicality
On the premise of type principle, it is also possible to this utility model is carried out some improvement and modification, these improve and modification also falls into this reality
With in novel scope of the claims.
Claims (7)
1. a safety extension ladder, includes two ladder bars the most vertically arranged, and each ladder bars is telescopically overlapped by more piece pole
Connect composition, it is characterised in that: being often provided with Buffer Unit at the lower ending opening of joint joint bar, described Buffer Unit includes fixing
Seat and movable disk, described fixing seat is fixing with upper joint joint bar to be connected, and described fixing seat and upper joint save and be provided with the between bar
One sealing ring, the bottom of described fixing seat is provided with air-flow post, and the height of described air-flow post is more than described movable disk
Highly, described movable disk is set on described air-flow post and slides up and down with it and coordinates, and described movable disk is with described
It is provided with gap between air-flow post, described air-flow post is arranged with the gasket seal suitable with described gap, described
The bottom of air-flow post is fixedly installed movable disk banking stop, in being placed on lower joint joint bar and slides up and down with it in described movable disk
Coordinate, between described movable disk and lower joint joint bar, be provided with the second sealing ring.
A kind of safety extension ladder the most according to claim 1, it is characterised in that: offer the first dress on described fixing seat
Distribution, is provided with steady pin, upper joint joint bar offers and the first described pilot hole position phase in the first described pilot hole
The second corresponding pilot hole, described steady pin through after the second described pilot hole, the first described pilot hole by described
Fixing seat is fixed with upper joint joint bar.
A kind of safety extension ladder the most according to claim 2, it is characterised in that: it is provided with assembling on described fixing seat
Platform, the bottom of upper joint joint bar is placed on described assembly bench, and described fixing seat offers the first seal groove, and described the
The inwall saving bar in one sealing ring is set in the first described seal groove and with upper joint is adjacent to.
A kind of safety extension ladder the most according to claim 1, it is characterised in that: the top of described air-flow post offers pad
Sheet back-up ring, described gasket seal is set in above described pad back-up ring.
A kind of safety extension ladder the most according to claim 1, it is characterised in that: offer second in described movable disk close
Sealing groove, the inwall saving bar in the second described sealing ring is set in the second described seal groove and with lower joint is adjacent to.
A kind of safety extension ladder the most according to claim 1, it is characterised in that: offer first segment on described fixing seat
Discharge orifice.
A kind of safety extension ladder the most according to claim 1, it is characterised in that: offer second section in described movable disk
Discharge orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620682512.5U CN205840753U (en) | 2016-06-22 | 2016-06-22 | A kind of safety extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620682512.5U CN205840753U (en) | 2016-06-22 | 2016-06-22 | A kind of safety extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205840753U true CN205840753U (en) | 2016-12-28 |
Family
ID=58150343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620682512.5U Expired - Fee Related CN205840753U (en) | 2016-06-22 | 2016-06-22 | A kind of safety extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205840753U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129982A1 (en) * | 2017-01-10 | 2018-07-19 | 潘跃进 | Slow descending mechanism of telescopic ladder |
| WO2018192095A1 (en) * | 2017-04-20 | 2018-10-25 | 周敏青 | Sealing sleeve and telescopic ladder |
| EP3428381A4 (en) * | 2017-01-10 | 2019-01-16 | Pan, Yuejin | Telescopic ladder |
| WO2020199256A1 (en) * | 2019-04-04 | 2020-10-08 | 东莞凯丰家居用品有限公司 | Telescopic ladder rod unit |
| EP3653832A4 (en) * | 2017-07-10 | 2021-04-21 | Dongguan Prestige Sporting Products Co., Ltd. | Telescopic pipe buffer structure |
| US11441354B2 (en) * | 2016-11-14 | 2022-09-13 | Lampe Holding B.V. | Telescopic ladder assembly |
-
2016
- 2016-06-22 CN CN201620682512.5U patent/CN205840753U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11441354B2 (en) * | 2016-11-14 | 2022-09-13 | Lampe Holding B.V. | Telescopic ladder assembly |
| WO2018129982A1 (en) * | 2017-01-10 | 2018-07-19 | 潘跃进 | Slow descending mechanism of telescopic ladder |
| EP3428381A4 (en) * | 2017-01-10 | 2019-01-16 | Pan, Yuejin | Telescopic ladder |
| WO2018192095A1 (en) * | 2017-04-20 | 2018-10-25 | 周敏青 | Sealing sleeve and telescopic ladder |
| EP3613935A4 (en) * | 2017-04-20 | 2020-04-22 | Zhou, Minqing | Sealing sleeve and telescopic ladder |
| US10934776B2 (en) | 2017-04-20 | 2021-03-02 | Minqing ZHOU | Closure cover and extension ladder |
| EP3653832A4 (en) * | 2017-07-10 | 2021-04-21 | Dongguan Prestige Sporting Products Co., Ltd. | Telescopic pipe buffer structure |
| WO2020199256A1 (en) * | 2019-04-04 | 2020-10-08 | 东莞凯丰家居用品有限公司 | Telescopic ladder rod unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20200622 |