CN203161061U - Extension ladder - Google Patents
Extension ladder Download PDFInfo
- Publication number
- CN203161061U CN203161061U CN 201320174679 CN201320174679U CN203161061U CN 203161061 U CN203161061 U CN 203161061U CN 201320174679 CN201320174679 CN 201320174679 CN 201320174679 U CN201320174679 U CN 201320174679U CN 203161061 U CN203161061 U CN 203161061U
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- CN
- China
- Prior art keywords
- ladder
- extension ladder
- face
- pipe
- limit pipe
- 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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Abstract
The utility model discloses an extension ladder. The extension ladder comprises a plurality of step sticks, a ladder edge pipe and a bottom cover, wherein the bottom cover is mounted at the bottom end of the ladder edge pipe. The extension ladder is characterized in that the surface of each step stick is provided with a convex-concave reinforcing rib. The step stick comprises a big arc face, a right angle face and a beveled edge face, and the big arc face, the right angle face and the beveled edge face form a closed ring-shaped body. The width of the step sticks is corresponding to that of the ladder edge pipe, and the width of the step sticks increases with enlargement of the ladder edge pipe. The step stick is provided with a ladder retracting unit mechanism, the ladder retracting unit mechanism comprises a lock pin, a spring, a button, a guide ring, a check ring and a blind rivet, wherein the lock pin is locked in a hole of the edge pipe. The guide ring is provided with a convex rib and a step, the step stick is provided with a groove, and the convex rib is matched with the groove. The extension ladder has the advantages of being convenient to use and safe.
Description
Technical field
The utility model relates to a kind of extension ladder, specifically a kind of extension ladder easy to use, safe.
Background technology
Existing all riding clubs of aluminium alloys extension ladder are all narrow, and are of a specified duration if the people in use stood, and can produce uncomfortable sensation.Existing aluminium alloys major part is with the hands to operate knob to carry out folding, fold ladder like this and make the user more arduous, and if the ladder decrease speed do not have the controlled hand of also hindering easily.The ladder of useful hand folding simultaneously knob, but because lock pin all need adopt different specifications at each grade, brought trouble to production, do over again because be easy to cause misloading, also be unfavorable for the standardization of spare and accessory parts, increase the overhead cost of storage.Existing a lot of extension ladders because decrease speed is very fast, are easy to hinder hand when folding, have unsafe factor.
Summary of the invention
The purpose of this utility model provides a kind of extension ladder easy to use, safe.
The purpose of this utility model is achieved through the following technical solutions.
A kind of extension ladder comprises some riding clubs, terraced limit pipe and bottom, and bottom is installed in the bottom of terraced limit pipe, it is characterized in that: the surface of described riding club is provided with the convex-concave reinforcing rib.
Described riding club comprises big cambered surface, right angle face and hypotenuse face, and big cambered surface, right angle face and hypotenuse face are formed the closed circular body.
The width of described riding club is corresponding with the width of terraced limit pipe, and the width of riding club increases with terraced limit pipe.
Described riding club is provided with ladder and folds unit mechanisms, and ladder folds unit mechanisms and comprises lock pin, spring, knob, guide ring, back-up ring and blind rivet, and lock pin is locked in the hole of limit pipe.
Described guide ring is provided with convex tendon and step, and riding club is provided with groove, and convex tendon and groove match.
Described bottom is provided with hanging platform, convex tendon and wall body, and hanging platform is corresponding with the hole of terraced limit pipe, and convex tendon and terraced limit inside pipe wall closely cooperate.
The utility model compared with prior art has the following advantages.
The utlity model has advantage easy to use, safe.
Description of drawings
Fig. 1 is the structural representation of riding club;
The arrangement schematic diagram of the different riding clubs of Fig. 2;
The distribution map of Fig. 3 knob;
The structural representation of Fig. 4 knob and lock pin;
The schematic diagram of Fig. 5 bottom;
The schematic diagram of Fig. 6 ladder limit pipe;
The specific embodiment
Below in conjunction with accompanying drawing the utility model extension ladder is described in further detail.
As shown in Figure 1, riding club 1 is by a big cambered surface 2, right angle face 3,4, and hypotenuse face 5,6 closed-loops of forming have scraggly reinforcing rib 7 on the big cambered surface, and wherein 2 and 4,3 is corresponding with 5.The right angle face becomes 90 degree, and the right angle face becomes 75 degree with the hypotenuse face.The width of riding club is corresponding with the width of terraced limit pipe 8.
As shown in Figure 2, the width of riding club increases with terraced limit pipe.When carrying ladder, the width of user's arm and ladder riding club adapts, and user's finger can be caught riding club right angle face, is conducive to the inconvenience of carrying that the user can not cause because of having widened riding club like this.
As shown in Figure 3, knob is widened successively along curve 9 and 10.
As shown in Figure 4, ladder folds unit mechanisms and is made up of lock pin 11, spring 12, knob 13, guide ring 14, back-up ring 15, blind rivet 16.Lock pin is crossed lockpin ventilating and is locked in the pipe of terraced limit in the hole 17 of upper level ladder limit pipe, thereby make ladder possess the function of climbing under the elastic force effect of spring.Pull knob with hand, back-up ring compression spring makes lock pin withdraw from the hole of upper level ladder limit pipe, thereby upper level ladder limit pipe is folded.In this block construction, the convex tendon 18 on the guide ring is corresponding with the groove 19 on the riding club, thereby plays the effect that prevents that riding club from rocking.Step 20 on the guide ring can play the effect that prevents tong.Guide ring cooperates with four angles 22 of terraced limit pipe by having only four angles 21, and all the other local modes that adopt empty avoiding can prevent the distortion when assembling of guide ring and terraced limit pipe.
As shown in Figure 5, bottom is made up of with wall body 25 hanging platform 23, convex tendon 24, and hanging platform is corresponding with the hole of terraced limit pipe.Convex tendon and terraced limit inside pipe wall are to closely cooperate, and produce frictional force under the elastic force of wall body 26 on the one hand, and bottom forms a relative sealed space with terraced limit pipe on the other hand, thereby plays the purpose of regulating decrease speed.Concave bar 28 is to terraced limit pipe indent and bottom 27 screens, to prevent from being pulled through a phenomenon.
As shown in Figure 6, terraced limit pipe is made up of two straight flanges 29,30 and two circular arc limits 31,32 that vary in size, and can increase the user like this and hold the limit comfort level in when pipe.
Claims (6)
1. an extension ladder comprises some riding clubs, terraced limit pipe and bottom, and bottom is installed in the bottom of terraced limit pipe, it is characterized in that: the surface of described riding club is provided with the convex-concave reinforcing rib.
2. extension ladder according to claim 1, it is characterized in that: described riding club comprises big cambered surface, right angle face and hypotenuse face, big cambered surface, right angle face and hypotenuse face composition closed circular body.
3. extension ladder according to claim 1, it is characterized in that: the width of described riding club is corresponding with the width of terraced limit pipe, and the width of riding club increases with terraced limit pipe.
4. extension ladder according to claim 1, it is characterized in that: described riding club is provided with ladder and folds unit mechanisms, and ladder folds unit mechanisms and comprises lock pin, spring, knob, guide ring, back-up ring and blind rivet, and lock pin is locked in the hole of limit pipe.
5. extension ladder according to claim 4, it is characterized in that: described guide ring is provided with convex tendon and step, and riding club is provided with groove, and convex tendon and groove match.
6. extension ladder according to claim 1, it is characterized in that: described bottom is provided with hanging platform, convex tendon and wall body, and hanging platform is corresponding with the hole of terraced limit pipe, and convex tendon and terraced limit inside pipe wall closely cooperate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320174679 CN203161061U (en) | 2013-04-09 | 2013-04-09 | Extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320174679 CN203161061U (en) | 2013-04-09 | 2013-04-09 | Extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161061U true CN203161061U (en) | 2013-08-28 |
Family
ID=49022254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320174679 Expired - Fee Related CN203161061U (en) | 2013-04-09 | 2013-04-09 | Extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017174604A1 (en) * | 2016-04-04 | 2017-10-12 | Telesteps Ab | An improved ladder tube for a collapsible ladder |
-
2013
- 2013-04-09 CN CN 201320174679 patent/CN203161061U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017174604A1 (en) * | 2016-04-04 | 2017-10-12 | Telesteps Ab | An improved ladder tube for a collapsible ladder |
| CN109072669A (en) * | 2016-04-04 | 2018-12-21 | 泰利斯泰普斯公司 | Improvement ladder pipe for folding ladder |
| US10961777B2 (en) | 2016-04-04 | 2021-03-30 | Telesteps Ab | Ladder tube for a collapsible ladder |
| CN109072669B (en) * | 2016-04-04 | 2021-06-29 | 泰利斯泰普斯公司 | Improved ladder tube for folding ladder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FOSHAN SHUNDE WRIGHT HOUSEWARES CO., LTD. Free format text: FORMER OWNER: ZHOU KEHAI Effective date: 20140424 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140424 Address after: 528300 Amway Industrial Zone, Daliang street, Shunde District, Guangdong, Foshan Patentee after: FOSHAN SHUNDE WRIGHT HOUSEWARES Co.,Ltd. Address before: 528300 Guangdong province Foshan city Shunde District Daliang Street East East Garden Lok Road, building 15, No. 402 Dongsheng Patentee before: Zhou Kehai |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |