CN203161060U - Extension ladder - Google Patents
Extension ladder Download PDFInfo
- Publication number
- CN203161060U CN203161060U CN2013201054616U CN201320105461U CN203161060U CN 203161060 U CN203161060 U CN 203161060U CN 2013201054616 U CN2013201054616 U CN 2013201054616U CN 201320105461 U CN201320105461 U CN 201320105461U CN 203161060 U CN203161060 U CN 203161060U
- Authority
- CN
- China
- Prior art keywords
- ladder
- foot
- bar
- driven lever
- 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
Links
Images
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
Abstract
The utility model discloses an extension ladder. The extension ladder comprises multiple extension ladder sections, and each extension ladder section comprises ladder rods, a foot rest lever and a locking release mechanism; the ladder rods of the multiple extension ladder sections are in sliding and overlapping connection step by step so as to form upright ladder posts on two sides of the extension ladder; and each locking release mechanism is arranged at two ends of the corresponding pedal rod, is used for connecting the pedal rod and the corresponding ladder rods and locks the mounting positions of the upper and lower extension ladder sections. The lowest stage of the extension ladder can be conveniently folded, the upper stages are sequentially unlocked, and finally, the whole extension ladder is folded to be in the most convenient storage and transport state. The gaps between each two adjacent ladder rods are shrunk by annular bosses, so that the extension ladder is more solid.
Description
Technical field
The utility model relates to a kind of ladder, refers to a kind of extension ladder that can stretch especially.
Background technology
In daily life, work high above the ground is that inevitably the climbing instrument must have absolute safety, reliability.Traditional ladder all is monolithic, though possess enough safeties and reliability, is not easy to carry and transport.
And existing most extension ladder is difficult to realize automation completely in manufacturing process, because the influence of its structure can't be produced with special plane, so production efficiency is relatively low.In order to guarantee the needs of yield of products and assembling, and the existence that has strengthened part aperture and some fit-up gaps, because the increase in these gaps and existence have caused product to cause in use and rocked, the use to people impacts then.
The utility model content
For solving the problems of the technologies described above, the utility model provides a kind of convenient storage and transportation, and constitutionally stable extension ladder.
The utility model is a kind of extension ladder, described extension ladder comprises the flexible section of ladder of some levels, described every grade of flexible section of ladder comprises terraced bar, foot-driven lever and hub lock releasing, the terraced bar nestable connection of slippage step by step of the flexible section of ladder of some levels, form the upright cleat stanchion of extension ladder both sides, described hub lock releasing is arranged on the two ends of each foot-driven lever, connecting pin treadle and corresponding terraced bar, and the installation site of the flexible section of ladder of two-stage up and down locked.
Described hub lock releasing comprises holder, adapter sleeve, retainer ring, steady pin, shell fragment, controller, described adapter sleeve is socketed in the outside of terraced masthead end, in the described retainer ring through hole is set, and run through and connect adapter sleeve and terraced bar, after the superior and the subordinate's ladder bar of described nestable connection stretches, higher level's ladder bar position corresponding with steady pin arranges lock hole, described holder is arranged on foot-driven lever inside, described shell fragment is arranged in the groove of holder, described controller is arranged on the below of shell fragment, the trend that under the effect of shell fragment, keeps down and move, described controller partly is positioned at foot-driven lever inside, part is positioned at the foot-driven lever outside, described controller axially arranges groove along foot-driven lever, the position of the antetheca of described groove and rear wall correspondence arranges the inclined-plane draw-in groove respectively, described steady pin one end is socketed in the through hole of retainer ring, the other end is arranged in the groove of controller, the both sides, front and back that are arranged on the steady pin in the groove of controller arrange circular protrusions respectively, and described circular protrusions is positioned at the inclined-plane draw-in groove of controller, and slide along described inclined-plane draw-in groove, the drive steady pin endwisely slips, and inserts in the lock hole of corresponding terraced bar.
On the described controller limited step is set, blocks mutually with the inwall of foot-driven lever controller is stopped to lower slider.
On the described adapter sleeve positioning step is set, described terraced bar bottom arranges annular boss, and described positioning step and annular boss cooperate to be made up and down the terraced bar of two-stage stop to stretch to slide, and the lock hole of higher level's ladder bar and the steady pin of subordinate are axially aligned.
The utility model also comprises the bottom section of ladder, described bottom section of ladder comprises the bottom foot-driven lever, the terraced bar in bottom and bottom locking controlling organization, described bottom section of ladder is arranged on all flexible section of ladders bottom, the nestable connection of terraced bar of the terraced bar in bottom and the flexible section of ladder of upper level, described bottom locking controlling organization is arranged on the middle part of the terraced bar in bottom, the terraced bar of the flexible section of ladder of locking upper level and the installation site of bottom section of ladder.
Described bottom locking controlling organization comprises the left and right sides securing rod that arranges along bottom foot-driven lever axial direction, fixator, gauge tap, spring, connecting axle, described spring is arranged on bottom foot-driven lever central authorities, and axially become the upright position with the bottom foot-driven lever, described spring one end contacts with the upper inside walls of bottom foot-driven lever, and the other end connects gauge tap, and described connecting axle one end connects gauge tap, the other end is connected with the opposite end axle of left and right sides securing rod, on the described connecting axle sliding shoe is set, the both sides that described fixator is positioned at spring arrange sliding tray, and described sliding shoe is positioned at sliding tray and can slides at sliding tray, after the bottom ladder bar of described nestable connection and upper level ladder bar stretch, the position corresponding with left and right sides securing rod arranges overlapping bottom lock hole, and left and right sides securing rod inserts in the lock hole of bottom.
Useful technique effect of the present utility model is: the utility model can allow the people very easily the minimum one-level of extension ladder be folded, thereby to upper level release successively, the most whole extension ladder folds into the state that most convenient stores, transports.The utility model utilizes annular boss to dwindle gap between terraced bar and terraced bar, makes extension ladder become more solid.
Description of drawings
Fig. 1 is that integral body of the present utility model folds the back schematic diagram.
Fig. 2 is that integral body of the present utility model is opened the back schematic diagram.
Fig. 3 is the lock-out state schematic diagram of the utility model hub lock releasing.
Fig. 4 is the release conditions schematic diagram of the utility model hub lock releasing.
Fig. 5 is the spacing enlarged diagram of terraced burr shape boss of the present utility model.
Fig. 6 is decomposing state schematic diagram of the present utility model.
Fig. 7 is the lock-out state schematic diagram of the utility model bottom locking controlling organization.
Fig. 8 is the release conditions schematic diagram of the utility model bottom locking controlling organization.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
The utility model is a kind of extension ladder, can allow the people very easily the minimum one-level of extension ladder be folded, thereby to upper level release successively, the most whole extension ladder folds into the state that most convenient stores, transports.
Shown in Fig. 1-2, described extension ladder comprises the flexible section of ladder of some levels, described every grade of flexible section of ladder comprises terraced bar A-3, foot-driven lever A-2 and hub lock releasing A-1, the terraced bar nestable connection of slippage step by step of the flexible section of ladder of some levels, form the upright cleat stanchion of extension ladder both sides, described hub lock releasing is arranged on the two ends of each foot-driven lever, connecting pin treadle and corresponding terraced bar, and the installation site of the flexible section of ladder of two-stage up and down locked.
Shown in Fig. 3-6, described hub lock releasing comprises holder 5, adapter sleeve 2, retainer ring C-3, steady pin C-2, shell fragment C-1, controller B-2, and described adapter sleeve is socketed in the outside of terraced masthead end, and adapter sleeve 2 is realized interference fit with terraced bar A-3.In the described retainer ring through hole is set, steady pin C-2 is carried out move axially.And run through and connect adapter sleeve and terraced bar, thus, the assembling the gap with regard to little to having ignored, the direction of ladder bar is also because the cause of retainer ring is also definitely definite, the aperture of the lock hole above the ladder bar also can dwindle, because the aperture dwindles, gap has in use also just dwindled greatly, has improved the stability of extension ladder.
After the superior and the subordinate's ladder bar of described nestable connection stretches, higher level's ladder bar position corresponding with steady pin arranges lock hole, described holder is arranged on foot-driven lever inside, described shell fragment C-1 is arranged in the groove of holder 5, described controller is arranged on the below of shell fragment, the trend that under the effect of shell fragment, keeps down and move, described controller partly is positioned at foot-driven lever inside, part is positioned at the foot-driven lever outside, described controller axially arranges groove along foot-driven lever, the position of the antetheca of described groove and rear wall correspondence arranges the inclined-plane draw-in groove respectively, described steady pin one end is socketed in the through hole of retainer ring, the other end is arranged in the groove of controller, the both sides, front and back that are arranged on the steady pin in the groove of controller arrange circular protrusions respectively, and described circular protrusions is positioned at the inclined-plane draw-in groove of controller, and slide along described inclined-plane draw-in groove, the drive steady pin endwisely slips, because shell fragment is directly exerted pressure to controller B-2, make controller that the trend of downward motion be arranged all the time, so steady pin C-2 has all the time to the trend of terraced bar direction motion, insert in the lock hole of corresponding terraced bar, upper level ladder bar is locked.
Positioning step C-4 is set on the described adapter sleeve, and described terraced bar bottom arranges annular boss C-5, and described limited step and annular boss cooperate to be made up and down the terraced bar of two-stage stop to stretch to slide, and the lock hole of higher level's ladder bar and the steady pin of subordinate are axially aligned.
On the described controller limited step is set, blocks mutually with the inwall of foot-driven lever controller is stopped to lower slider.
This extension ladder also comprises the bottom section of ladder, described bottom section of ladder comprises the bottom foot-driven lever, the terraced bar in bottom and bottom locking controlling organization, described bottom section of ladder is arranged on all flexible section of ladders bottom, bar is nestable is connected for bottom terraced bar and upper level ladder, described bottom locking controlling organization is arranged on the middle part of the terraced bar in bottom, the installation site of locking upper level ladder bar and bottom section of ladder.
Described bottom locking controlling organization comprises the left and right sides securing rod D-3 that arranges along bottom foot-driven lever axial direction, fixator D-2, gauge tap D-1, spring D-5, connecting axle D-4, described spring is arranged on bottom foot-driven lever central authorities, and axially become the upright position with the bottom foot-driven lever, described spring one end contacts with bottom foot-driven lever upper inside walls, the other end connects gauge tap, described connecting axle one end connects gauge tap, the other end is connected with the opposite end axle of left and right sides securing rod, sliding shoe D-7 is set on the described connecting axle, and the both sides that described fixator is positioned at spring arrange sliding tray, and described sliding shoe D-7 is positioned at sliding tray D-6 and can slides at sliding tray, after the bottom ladder bar of described nestable connection and upper level ladder bar stretch, the position corresponding with left and right sides securing rod D-3 arranges overlapping bottom lock hole, and left and right sides securing rod D-3 inserts in the lock hole of bottom.
When pressing gauge tap D-1, left and right sides securing rod D-3 can be as shown in figure-8, to the foot-driven lever intermediary movements to extreme position, this moment is by terraced bar B-4, hub lock releasing B-5, the one-level extension ladder festival-gathering that foot-driven lever B-45 forms does not freely move downward because there being the effect of left and right sides securing rod D-3, begin to contact with the foot-driven lever of next stage up to controller B-2, controller B-2 can up move under the effect of external force, in being withdrawn into foot-driven lever, this moment, the steady pin C-2 of flexible section of ladder can be shown in figure-4, steady pin C-2 can be because of the cause of inclined-plane draw-in groove among the controller B-2, to the motion of foot-driven lever central authorities, steady pin C-2 is broken away from from the lock hole of upper level ladder bar, go up a unit like this and just can move down because of the effect that does not have steady pin.As shown in Figure 2, the extension ladder festival-gathering of terraced bar B-6, hub lock releasing B-7, foot-driven lever B-67 composition does not at this moment freely move downward because there being the effect of steady pin, and so forth, the flexible section of ladder that ladder bar B-8, hub lock releasing B-9, foot-driven lever B-89 form moves downward, until going out shown in the ready-made figure-1 and folding completely.
When extension ladder is opened, only need hold adapter sleeve this grade lower end is drawn back, shown in figure-3, reach steady pin until hub lock releasing and play effect, this moment, extension ladder can use normally.
Figure-3 in when extension ladder when opening, when the flexible section of ladder of upper level moves upward, until the annular boss C-5 of upper level ladder bar during to the positioning step C-4 of adapter sleeve 2, upper level ladder bar stops motion upwards under the stopping of limited step C-4, and the lock hole of this moment and higher level's ladder bar and the steady pin of subordinate are axially aligned, this moment, steady pin then was inserted in the lock hole under shell fragment acts on indirectly, thereby upper level ladder bar is locked.Utilize annular boss to dwindle gap between terraced bar and terraced bar simultaneously, make extension ladder become more solid.
Because controller B-2 is subjected to the compressing of shell fragment C-1 all the time, when the head of steady pin does not have bar, controller B-2 can move downward, inclined-plane draw-in groove among this moment controller B-2 can be oppressed steady pin C-2 and be moved to terraced bar direction, when the limited step in controller B-2 contacts with the inwall of foot-driven lever, controller B-2 stop motion, this moment, steady pin also stopped to move in the lock hole of terraced bar, this moment, steady pin then moved to maximum position, this moment, steady pin just can lock upper level ladder bar, it can not be moved up and down, thereby reach the purpose of locking.
Shown in figure-7, when pressing gauge tap D-1, when making gauge tap D-1 along the axially-movable of spring D-5, drive sliding shoe D-7 and in sliding tray D-6, slide, thereby the angle of connecting axle D-4 is changed, and make left and right sides securing rod D-3 to intermediary movements, until becoming shown in the figure-8, upper level extension ladder festival-gathering this moment is not because there is the cause of left and right sides securing rod D-3 locking, and free-falling, thereby reach the purpose that folds.
Shown in figure-8, gauge tap D-1 can move left under the effect of D-5, sliding shoe D-7 can also be moved to the left under the drive of D-1, thereby the angle of connecting axle D-4 and left and right sides securing rod D-3 is changed, left and right sides securing rod D-3 is moved to both sides, shown in one-tenth figure-7, this moment, above-mentioned action will be implemented under the effect of spring D-5 if open extension ladder.
The above only is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (6)
1. extension ladder, it is characterized in that, described extension ladder comprises the flexible section of ladder of some levels, described every grade of flexible section of ladder comprises terraced bar, foot-driven lever and hub lock releasing, the terraced bar nestable connection of slippage step by step of the flexible section of ladder of some levels, the upright cleat stanchion of formation extension ladder both sides, described hub lock releasing is arranged on the two ends of each foot-driven lever, connecting pin treadle and corresponding terraced bar, and the installation site of the flexible section of ladder of two-stage up and down locked.
2. a kind of extension ladder according to claim 1, it is characterized in that, described hub lock releasing comprises holder, adapter sleeve, retainer ring, steady pin, shell fragment, controller, described adapter sleeve is socketed in the outside of terraced masthead end, in the described retainer ring through hole is set, and run through and connect adapter sleeve and terraced bar, after the superior and the subordinate's ladder bar of described nestable connection stretches, higher level's ladder bar position corresponding with steady pin arranges lock hole, described holder is arranged on foot-driven lever inside, described shell fragment is arranged in the groove of holder, described controller is arranged on the below of shell fragment, the trend that under the effect of shell fragment, keeps down and move, described controller partly is positioned at foot-driven lever inside, part is positioned at the foot-driven lever outside, described controller axially arranges groove along foot-driven lever, the position of the antetheca of described groove and rear wall correspondence arranges the inclined-plane draw-in groove respectively, described steady pin one end is socketed in the through hole of retainer ring, the other end is arranged in the groove of controller, the both sides, front and back that are arranged on the steady pin in the groove of controller arrange circular protrusions respectively, and described circular protrusions is positioned at the inclined-plane draw-in groove of controller, and slide along described inclined-plane draw-in groove, the drive steady pin endwisely slips, and inserts in the lock hole of corresponding terraced bar.
3. a kind of extension ladder according to claim 2 is characterized in that, on the described controller limited step is set, and blocks mutually with the inwall of foot-driven lever controller is stopped to lower slider.
4. a kind of extension ladder according to claim 2, it is characterized in that, on the described adapter sleeve positioning step is set, described terraced bar bottom arranges annular boss, described positioning step and annular boss cooperate to be made up and down the terraced bar of two-stage stop to stretch to slide, and the lock hole of higher level's ladder bar and the steady pin of subordinate are axially aligned.
5. a kind of extension ladder according to claim 2, it is characterized in that, also comprise the bottom section of ladder, described bottom section of ladder comprises the bottom foot-driven lever, the terraced bar in bottom and bottom locking controlling organization, described bottom section of ladder is arranged on all flexible section of ladders bottom, the nestable connection of terraced bar of bottom ladder bar and the flexible section of ladder of upper level, described bottom locking controlling organization is arranged on the middle part of the terraced bar in bottom, the terraced bar of the flexible section of ladder of locking upper level and the installation site of bottom section of ladder.
6. a kind of extension ladder according to claim 5, it is characterized in that, described bottom locking controlling organization comprises the left and right sides securing rod that arranges along bottom foot-driven lever axial direction, fixator, gauge tap, spring, connecting axle, described spring is arranged on bottom foot-driven lever central authorities, and axially become the upright position with the bottom foot-driven lever, described spring one end contacts with the upper inside walls of bottom foot-driven lever, and the other end connects gauge tap, and described connecting axle one end connects gauge tap, the other end is connected with the opposite end axle of left and right sides securing rod, on the described connecting axle sliding shoe is set, the both sides that described fixator is positioned at spring arrange sliding tray, and described sliding shoe is positioned at sliding tray and can slides at sliding tray, after the bottom ladder bar of described nestable connection and upper level ladder bar stretch, the position corresponding with left and right sides securing rod arranges overlapping bottom lock hole, and left and right sides securing rod inserts in the lock hole of bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201054616U CN203161060U (en) | 2013-03-08 | 2013-03-08 | Extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201054616U CN203161060U (en) | 2013-03-08 | 2013-03-08 | Extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161060U true CN203161060U (en) | 2013-08-28 |
Family
ID=49022253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201054616U Expired - Fee Related CN203161060U (en) | 2013-03-08 | 2013-03-08 | Extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161060U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837155A (en) * | 2017-01-10 | 2017-06-13 | 潘跃进 | A kind of extension ladder |
| CN109197138A (en) * | 2018-10-31 | 2019-01-15 | 长江师范学院 | A kind of fruit picking control method |
| CN109197139A (en) * | 2018-10-31 | 2019-01-15 | 长江师范学院 | A kind of Ladder for picking fruit |
| CN110847800A (en) * | 2019-04-08 | 2020-02-28 | 崇华科技永康有限公司 | Extension ladder |
| GB2579552A (en) * | 2018-12-02 | 2020-07-01 | Andrew Beard Michael | Telescopic ladder of modular construction with integrated safety devices |
-
2013
- 2013-03-08 CN CN2013201054616U patent/CN203161060U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837155A (en) * | 2017-01-10 | 2017-06-13 | 潘跃进 | A kind of extension ladder |
| CN106837155B (en) * | 2017-01-10 | 2018-08-07 | 潘跃进 | A kind of extension ladder |
| CN109197138A (en) * | 2018-10-31 | 2019-01-15 | 长江师范学院 | A kind of fruit picking control method |
| CN109197139A (en) * | 2018-10-31 | 2019-01-15 | 长江师范学院 | A kind of Ladder for picking fruit |
| CN109197139B (en) * | 2018-10-31 | 2020-11-17 | 长江师范学院 | Ladder is picked to fruit |
| CN109197138B (en) * | 2018-10-31 | 2020-11-17 | 长江师范学院 | Fruit picking control method |
| GB2579552A (en) * | 2018-12-02 | 2020-07-01 | Andrew Beard Michael | Telescopic ladder of modular construction with integrated safety devices |
| CN110847800A (en) * | 2019-04-08 | 2020-02-28 | 崇华科技永康有限公司 | Extension ladder |
| CN111155922A (en) * | 2019-04-08 | 2020-05-15 | 崇华科技永康有限公司 | Inner ladder section of extension ladder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203161060U (en) | Extension ladder | |
| CN201457624U (en) | Scooter folding device | |
| CN2936691Y (en) | Mould locking mechanism for bottle blowing machine | |
| CN106654951B (en) | A kind of electric power drawer-type switch cabinet | |
| CN104453388B (en) | Idle pickproof flat tumbler cylinder | |
| CN110005671A (en) | A kind of table frame and desk convenient for assembling | |
| CN201055349Y (en) | Telescopic siphon for dust collection device | |
| CN207837231U (en) | Cribguard | |
| CN2549618Y (en) | Plug and socket with central locking mechanism | |
| CN202843499U (en) | Closestool cover plate quick assembling-disassembling lock catch device | |
| CN107994400A (en) | A kind of deduster equipment | |
| CN111631508A (en) | Deformable table | |
| CN207078073U (en) | A kind of push type opening structure of automobile glove box | |
| CN104287526B (en) | A kind of child bed of liftable guardrail | |
| CN202520080U (en) | Spring lock | |
| CN101029543B (en) | Mechanical lock | |
| CN106005201B (en) | A kind of folded bicycle and its handlebar | |
| CN207045563U (en) | A kind of Foldable scooter easily folded using complete buckle structure | |
| CN207821511U (en) | Lift Cribguard | |
| CN204436051U (en) | A kind of idle running pick-proof blade lock core | |
| CN106263414A (en) | It is easy to instrument and carries the expansion locking device of use | |
| CN203160812U (en) | Control buckle device applied to sliding mechanism | |
| CN205649441U (en) | Locking chair of bathing | |
| CN102361201A (en) | Plug dislocation interlocking apparatus used by general-purpose converter | |
| CN205976793U (en) | Shutter door lock |
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 |
Granted publication date: 20130828 Termination date: 20150308 |
|
| EXPY | Termination of patent right or utility model |