CN2622373Y - Telescopic ladder - Google Patents
Telescopic ladder Download PDFInfo
- Publication number
- CN2622373Y CN2622373Y CN 03225236 CN03225236U CN2622373Y CN 2622373 Y CN2622373 Y CN 2622373Y CN 03225236 CN03225236 CN 03225236 CN 03225236 U CN03225236 U CN 03225236U CN 2622373 Y CN2622373 Y CN 2622373Y
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- China
- Prior art keywords
- ladder
- rolling
- foot rest
- fixed
- mentioned
- 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
A telescopic ladder includes a fixed ladder and at least a side-rolling ladder sleeve jointed with the fixed ladder, and is characterized in that the lower part of the side-rolling ladder is provided with a locking mechanism which locks the side-rolling ladder and the fixed ladder at different telescopic heights; the locking mechanism consists of a pair of clutches rotationally connected to the inner side wall of two slide ladder posts, a pedal plate below the side-rolling ladder and any step of pedal plate of the fixed ladder; the lower end of the clutches is respectively provided with a braced clip groove which can contain the side-rolling ladder and the fixed ladder pedal plate. Because of the locking mechanism which locks the side-rolling ladder and the fixed ladder at different telescopic heights positioned at the lower part of the side-rolling ladder, when the side-rolling ladder moves to a required height along the fixed ladder, only the pair of clutches on the locking mechanism can lock the two ladders; while the height can be changed or the ladder bed can be folded only by lifting up a push-pull rob positioned between the clutches.
Description
Technical field
The utility model relates to a kind of ladder, particularly a kind of extension ladder.
Background technology
Original ladder generally adopts bamboo ladder or aluminium ladder, because the length of ladder is constant, use under different situations so be difficult to adapt to, and when needing in the higher position operation, the bamboo ladder easily produces swing because of its poor rigidity, in addition, because of the bamboo ladder is difficult to shrink, makes and carries the difficulty that becomes.For overcoming above-mentioned existing problems, ZL91231727.2 discloses a kind of extension ladder, its basic structure is by section of ladder and expansion coupling constitute down, there are not mobile ladder bar and fixed ladder bar on the expansion coupling, be provided with alignment pin in the expansion coupling cleat stanchion skewer section of going into, be provided with locating hole in following section of ladder cleat stanchion relevant position, this technical scheme cardinal principle is to slide mutually by a fixed ladder and extension ladder to prolong the height of ladder, its fixed form adopts bolt-type to connect, this technical scheme exists because of gravity is concentrated and acts on the latch at ladder two ends, and cause the unsafe factor that has when using, the method of attachment of bolt-type in addition, higher to the inner surface processing request of terraced rail when regulating, can influence whole terraced manufacturing cost.
Summary of the invention
The purpose of this utility model is to provide a kind of at above-mentioned existing problems rabbets firmly, stress equalization and simple in structure, easy to operate extension ladder.
The technical solution of the utility model is: a kind of extension ladder, comprise that fixed ladder reaches and at least one side-rolling ladder of fixed ladder socket, it is characterized in that described side-rolling ladder bottom is provided with the retaining mechanism that side-rolling ladder is locked together at flexible height of difference and fixed ladder, described retaining mechanism is made up of a pair of foot rest that is connected in button pawl on the two cleat stanchion inside walls that slide and side-rolling ladder below rotationally and the fixed ladder one-level foot rest of taking up an official post, the lower end of described button pawl is provided with the draw-in groove that the band of ccontaining side-rolling ladder and fixed ladder foot rest simultaneously closes up, and the foot rest of described side-rolling ladder below and the fixed ladder one-level foot rest of taking up an official post is fixed by draw-in groove.
For making the flexible more convenient of side-rolling ladder, the further technical scheme of the utility model is to be provided with the pull bar that can make two button pawl interlocks between above-mentioned button pawl.
The utility model is because the retaining mechanism that the made side-rolling ladder that is provided with in the side-rolling ladder bottom locks together at different telescopic sections and fixed ladder, when side-rolling ladder when fixed ladder moves to required height, only needing just can be with the mutual fastening of two ladders by the make-up pawl on the retaining mechanism, and when packing up when need changing height or with ladder, the pull bar that only needs will be located between the button pawl is upwards mentioned, and just can regulate the height of ladder or ladder is drawn in.Though because button pawl one end is connected with the ladder sidewall but detains dog clutch and put in foot rest, make each stress equalization of ladder again, guaranteed the safety of use.
The utility model is described in further detail below in conjunction with accompanying drawing:
Description of drawings
Fig. 1 is a stereogram of the present utility model;
Fig. 2 is user mode figure of the present utility model;
Fig. 3 is button pawl and foot rest locked state schematic diagram.
The specific embodiment
The utility model such as Fig. 1, Fig. 2, shown in Figure 3, comprise that fixed ladder 1 reaches and at least one side-rolling ladder 2 of fixed ladder 1 socket, it is characterized in that described side-rolling ladder 2 bottoms are provided with the retaining mechanism 3 that side-rolling ladder 2 is locked together at flexible height of difference and fixed ladder 1, described retaining mechanism 3 is made up of a pair of foot rest 4 that is connected in button pawl 31 on two cleat stanchions, 21 inside walls that slide and side-rolling ladder 2 belows rotationally and the fixed ladder 1 one-level foot rest of taking up an official post, the lower end of described button pawl 3 is provided with the draw-in groove that the band of ccontaining side-rolling ladder 2 and fixed ladder 1 foot rest simultaneously closes up, and the foot rest 4 and the fixed ladder of the described side-rolling ladder 2 belows one-level foot rest of taking up an official post is fixed by draw-in groove.Above-mentioned band closing in draw-in groove 32 is up-narrow and down-wide and the draw-in groove of two ends band indent arc, and the width of its draw-in groove mouth should be slightly larger than bipod tread width sum, and the thickness of the degree of depth of its draw-in groove 32 and foot rest 4 is suitable.Above-mentioned button pawl 31 is connected with the be connected to bolt or riveted joint or pin of side-rolling ladder 2.For making the flexible more convenient of side-rolling ladder 2, between button pawl 31, be provided with the pull bar 33 that can make 31 interlocks of two button pawls.Be with an empty avoiding ring set 5 on the bolt between above-mentioned button pawl and the side-rolling ladder.The installation site of above-mentioned button pawl 31 and side-rolling ladder 2 is between side-rolling ladder 2 first and second grade foot rests 4, and this structure can guarantee that two ladders extend the longest.In addition, for adapting to the work of higher aspect, the quantity of above-mentioned side-rolling ladder 2 is at least one.Above-mentioned foot rest 4 is for having half arc of cavity, and its foot-operated face is provided with anti-skidding convex straight burr 6.The riveted joint that is connected to of above-mentioned foot rest 4 and ladder.Foot-operated face on the above-mentioned foot rest 4 is oblique setting, and the angle of itself and horizontal plane is 10～30 degree.
In actual mechanical process, because the retaining mechanism that the made side-rolling ladder that is provided with in the side-rolling ladder bottom locks together at different telescopic sections and fixed ladder, when side-rolling ladder when fixed ladder moves to required height, only needing just can be with the mutual fastening of two ladders by the make-up pawl on the retaining mechanism, and when packing up when need changing height or with ladder, the pull bar that only needs will be located between the button pawl is upwards mentioned, and just can regulate the height of ladder or ladder is drawn in.Though because button pawl one end is connected with the ladder sidewall but detains dog clutch and put in foot rest, make each stress equalization of ladder again, guaranteed the safety of use.
Claims (9)
1, a kind of extension ladder, comprise that fixed ladder (1) reaches and at least one side-rolling ladder (2) of fixed ladder (1) socket, it is characterized in that described side-rolling ladder (2) bottom is provided with the retaining mechanism (3) that side-rolling ladder (2) is locked together at flexible height of difference and fixed ladder (1), described retaining mechanism (3) is made up of a pair of foot rest (4) that is connected in button pawl (31) on two cleat stanchions (21) inside wall that slides and side-rolling ladder (2) below rotationally and fixed ladder (1) the one-level foot rest of taking up an official post, the lower end of described button pawl (3) is provided with the draw-in groove that the band of ccontaining side-rolling ladder (2) and fixed ladder (1) foot rest simultaneously closes up, and the foot rest (4) of described side-rolling ladder (2) below and the fixed ladder one-level foot rest of taking up an official post is fixed by draw-in groove.
2, extension ladder according to claim 1 is characterized in that being provided with between the above-mentioned button pawl (31) pull bar (33) that can make two button pawl interlocks.
3, extension ladder according to claim 1 is characterized in that the thickness of the degree of depth of above-mentioned draw-in groove (32) and foot rest (4) is suitable.
4, extension ladder according to claim 1 is characterized in that above-mentioned button pawl (31) is connected with the be connected to bolt or riveted joint or pin of slip cleat stanchion (21).
5, extension ladder according to claim 4 is characterized in that being with on the bolt between above-mentioned button pawl and the side-rolling ladder empty avoiding ring set (5).
6, extension ladder according to claim 1 is characterized in that the installation site of above-mentioned button pawl (31) and side-rolling ladder (2) is positioned between side-rolling ladder (2) first and second grade foot rest (4).
7, extension ladder according to claim 1 is characterized in that above-mentioned foot rest (4) for having half arc of cavity, and its foot-operated face is provided with anti-skidding convex straight burr (6).
8,, it is characterized in that the riveted joint that is connected to of above-mentioned foot rest (4) and ladder according to claim 1 or 7 described extension ladders.
9, according to claim 1 or described extension ladder, it is characterized in that the foot-operated face on the above-mentioned foot rest (4) is oblique setting, the angle of itself and horizontal plane is 10～30 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03225236 CN2622373Y (en) | 2003-04-17 | 2003-04-17 | Telescopic ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03225236 CN2622373Y (en) | 2003-04-17 | 2003-04-17 | Telescopic ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2622373Y true CN2622373Y (en) | 2004-06-30 |
Family
ID=34245890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03225236 Expired - Fee Related CN2622373Y (en) | 2003-04-17 | 2003-04-17 | Telescopic ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2622373Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000161A1 (en) * | 2006-06-20 | 2008-01-03 | Luhao Leng | Stile structure for an extension ladder |
| WO2008052438A1 (en) * | 2006-11-01 | 2008-05-08 | Luhao Leng | A stepladder capable of lifting |
| CN101105110B (en) * | 2006-07-10 | 2010-05-26 | 王相武 | Safety extension ladder |
| CN101881132A (en) * | 2010-07-01 | 2010-11-10 | 天津市金锚集团有限责任公司 | Ladder frame lock and ladder thereof |
| CN108756724A (en) * | 2018-05-25 | 2018-11-06 | 夏邑县淮海电梯铸件有限公司广州分公司 | A kind of elevator pit ladder and its application method |
| CN114482497A (en) * | 2022-03-04 | 2022-05-13 | 中科建工集团有限公司 | Outer wall construction removes slide rail device |
-
2003
- 2003-04-17 CN CN 03225236 patent/CN2622373Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000161A1 (en) * | 2006-06-20 | 2008-01-03 | Luhao Leng | Stile structure for an extension ladder |
| CN101105110B (en) * | 2006-07-10 | 2010-05-26 | 王相武 | Safety extension ladder |
| WO2008052438A1 (en) * | 2006-11-01 | 2008-05-08 | Luhao Leng | A stepladder capable of lifting |
| CN101881132A (en) * | 2010-07-01 | 2010-11-10 | 天津市金锚集团有限责任公司 | Ladder frame lock and ladder thereof |
| CN101881132B (en) * | 2010-07-01 | 2012-08-08 | 天津市金锚集团有限责任公司 | Ladder frame lock and ladder thereof |
| CN108756724A (en) * | 2018-05-25 | 2018-11-06 | 夏邑县淮海电梯铸件有限公司广州分公司 | A kind of elevator pit ladder and its application method |
| CN114482497A (en) * | 2022-03-04 | 2022-05-13 | 中科建工集团有限公司 | Outer wall construction removes slide rail device |
| CN114482497B (en) * | 2022-03-04 | 2023-09-15 | 中科建工集团有限公司 | Movable sliding rail device for outer wall construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |