CN105525862A - Combined ladder with adjustable height - Google Patents
Combined ladder with adjustable height Download PDFInfo
- Publication number
- CN105525862A CN105525862A CN201610033751.2A CN201610033751A CN105525862A CN 105525862 A CN105525862 A CN 105525862A CN 201610033751 A CN201610033751 A CN 201610033751A CN 105525862 A CN105525862 A CN 105525862A
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- China
- Prior art keywords
- ladder
- lock
- handle
- shaft
- lock pin
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/06—Securing devices or hooks for parts of extensible ladders
-
- 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
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a combined ladder with the adjustable height. The combined ladder comprises an inner ladder body, an outer ladder body and locking devices used for locking the inner ladder body and the outer ladder body. The combined ladder is characterized in that each locking device comprises a base and a handle; the base bodies are fixedly arranged on ladder columns of the outer ladder body, and each base is internally provided with a columnar cavity for a rod-shaped lock pin to penetrate; the rod-shaped lock pins reciprocate in the columnar cavities; the handles are rotationally arranged on the outer sides of the bases, rotation cavities are formed in the inner sides of the handles in a concave manner, the rotating cavities are formed outside the base bodies in a sleeving manner and the handles rotate on the bases; the tails of the rod-shaped lock pins are positioned on the handles, and the rod-shaped lock pins synchronously move with the handles in the axial direction; a plurality of matched inclined faces are arranged between the inner walls of the rotating cavities and the outer walls of the bases; each rod-shaped lock pin is sleeved with a spring acting on the part between the head of the rod-shaped lock pin and the corresponding columnar cavity; and elastic positioning pins are arranged in the handles; and positioning grooves corresponding to the bases are formed in the outer walls of the bases. According to the combined ladder with the adjustable height, the contradiction existing between the locking reliability and operation convenience in the prior art is avoided, meanwhile, the structure is reasonable, and application is wide.
Description
Technical field
The present invention relates to combination ladder, being specifically related to a kind of locking device for locking the inside and outside cleat stanchion position of combination ladder.
Background technology
Ladder is the common tool of climbing to a higher point, and common are vertical ladder or double ladder.In most cases, ladder can meet the needs of climbing to a higher point of user, but in some cases, during as needed the height of climbing to a higher point to exceed the limit of ladder as user, now ladder just cannot meet the requirement of climbing to a higher point.
In order to address this problem, industry has invented a kind of combination ladder, and this combination ladder comprises manhole ladder and outside staircase two parts, and the cleat stanchion of outside staircase is set on the cleat stanchion of manhole ladder, form described outside staircase to slide up and down on manhole ladder, to reach the effect of increasing the overall limit of climbing to a higher point of ladder.In order to lock the position of cleat stanchion on the cleat stanchion of manhole ladder of outside staircase, usually locking device can be set between the cleat stanchion of interior outside staircase.Traditional locking device structure is by the arranged outside flexible lock pin at two cleat stanchions of outside staircase, and some locating holes are offered along cleat stanchion length direction on the cleat stanchion of manhole ladder, utilize the elasticity self-locking of this flexible lock pin to coordinate locating hole location outside staircase and the manhole ladder state of differing heights position.This conventional locking mechanisms finds to there is following problem in Long-Time Service: one, as the reliability in order to pursue locking, requires that the spring of flexible lock pin will have enough pulling force, causes ladder when regulating height, the very painstaking inconvenience of unblock of this locking device; Two, as in order to pursue ladder heighten time, the operation ease of this locking device, then require again that the spring of flexible lock pin can not have too large pulling force, therefore again reduces the reliability of locking.
Therefore, how to solve the contradiction between the locking reliability of above-mentioned prior art existence and operation ease, just become the problem that the present invention will research and solve.
Summary of the invention
The object of this invention is to provide a kind of adjustable for height combination ladder, to overcome the contradiction that prior art exists in locking reliability and operation ease.
For achieving the above object, the technical solution used in the present invention is: a kind of adjustable for height combination ladder, described combination ladder comprises manhole ladder, outside staircase and the locking device for locking manhole ladder and outside staircase, the cleat stanchion of described outside staircase is sheathed on the cleat stanchion of described manhole ladder, the cleat stanchion of described outside staircase offers outer lock hole along its thickness direction, and on the cleat stanchion of described manhole ladder, corresponding described outer lock hole offers multiple interior lock hole along the length direction of the cleat stanchion of manhole ladder; Described locking device is fixedly arranged on the described outer lock hole place on the cleat stanchion of described outside staircase, is reached the object of location manhole ladder and outside staircase position relationship, namely reach the locking to combination ladder by the locking of simultaneously externally lock hole and a certain interior lock hole;
Described locking device comprises pedestal and handle two parts; Wherein,
Described pedestal is fixedly arranged on the cleat stanchion of described outside staircase, offers a column chamber in pedestal, and this column chamber wears for a shaft-like lock pin, and the corresponding described outer lock hole of this column chamber is arranged; Described shaft-like lock pin moves back and forth in column chamber, and the head forming shaft-like lock pin stretches into or shift out described interior lock hole via described outer lock hole, thus realizes described locking device the locking and unlocking to combination ladder; When the head of described shaft-like lock pin stretches in described interior lock hole, being the lock-out state of described combination ladder, when the head of described shaft-like lock pin shifts out in described interior lock hole, is then the released state of described combination ladder;
Described handle rotates the outside being arranged at described pedestal, has a Handheld Division; The inner side of handle is arranged with a rotation chamber, and this rotation chamber is set on pedestal, and forming described handle is that axle rotates with pedestal; The afterbody of described shaft-like lock pin stretches out described pedestal outwardly vertically and is positioned on described handle, forms described shaft-like lock pin and described handle synchronous shift in the axial direction; The multiple inclined-planes cooperatively interacted are provided with between the inwall of described rotation chamber and the outer wall of described pedestal, form when described handle rotates, handle can realize axial displacement outwardly, and draw the displacement outwardly of described shaft-like lock pin whereby, the head of shaft-like lock pin is shifted out described interior lock hole, unlocks described combination ladder;
Wherein, described shaft-like lock pin is arranged with a spring, one end of this spring is resisted against the head of shaft-like lock pin, and the other end is then resisted against in described column chamber; When described combination ladder is lock-out state, described shaft-like lock pin stretches in described interior lock hole inwardly, and described spring is in the state upheld completely, and when described combination ladder is released state, described handle strip lever shape lock pin is towards outer displacement, and described spring is in by the state compressed;
Also be provided with an elastic positioning pin in described handle, this elastic positioning pin is arranged towards the outer wall of described pedestal, to being provided with two locating slots by elastic positioning pin on the outer wall of pedestal; Design whereby, when described handle turns to the lock-out state position of combination ladder, the first locating slot that described elastic positioning pin will snap in automatically near outside staircase, realizes the maintenance to combination ladder lock-out state; And when described handle turns to the released state position of combination ladder, described elastic positioning pin will snap in the second locating slot of outer end automatically, realize the maintenance to combination ladder released state.
Related content in technique scheme is explained as follows:
1. in such scheme, described column chamber is cylindric, and the main body of described shaft-like lock pin is cylindric.
2., in such scheme, the afterbody of described shaft-like lock pin is positioned on described handle by snap ring or clip spring structure, also can be located by other location structures, not enumerate.
3., in such scheme, by the setting on described inclined-plane, make described handle can realize axially-movable by rotation; And the setting on multiple inclined-plane, the stationarity that the further lifting handle of energy rotates, improves the feel of operator.
4. in such scheme, described elastic positioning pin has pin rod and plunger two parts, and the corresponding described locating slot of described plunger is arranged, and described pin rod is arranged with one second spring, one end of this second spring is resisted against described plunger, and the other end is then resisted against in described handle.Described elastic positioning pin can also adopt other form of structure, as the form of spring joined by ball.
Operating principle of the present invention and advantage as follows:
A kind of adjustable for height combination ladder of the present invention, comprises manhole ladder, outside staircase and the locking device for locking interior outside staircase; This locking device comprises pedestal and is sheathed on the handle on pedestal, wherein be equipped with a shaft-like lock pin in pedestal, the afterbody of this shaft-like lock pin passes pedestal and is connected with handle and locates, form and link with handle, move reciprocatingly, thus make the head of shaft-like lock pin stretch into or shift out interior lock hole via outer lock hole, and then lock or unlock combination ladder.Compared to existing technologies, the present invention is rational in infrastructure, particularly by the cooperation on inclined-plane multiple between pedestal and handle, makes the rotation of handle to realize axially-movable, can also protect the facility of the steady of rotation and operation; Additionally by the setting of spring sheathed on shaft-like lock pin and elastic positioning pin, the reliability that combination ladder locks can also be ensured, solve the contradiction that prior art exists in locking reliability and operation ease.To sum up, the present invention has the advantages such as rational in infrastructure, operation is convenient, safe and reliable, may be used for various types of combination ladder.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation one (master looks) of the embodiment of the present invention;
Accompanying drawing 2 is the structural representation two (side-looking) of the embodiment of the present invention;
Accompanying drawing 3 is the partial enlarged drawing at A place in Fig. 1;
Accompanying drawing 4 is the partial enlarged drawing at B place in Fig. 2;
Accompanying drawing 5 is the decomposition explosion figure mono-of locking device in the embodiment of the present invention;
Accompanying drawing 6 is the decomposition explosion figure bis-of locking device in the embodiment of the present invention.
In above accompanying drawing: 1. manhole ladder; 2. outside staircase; 3. outer lock hole; 4. lock hole in; 5. pedestal; 6. handle; 7. column chamber; 8. shaft-like lock pin; 9. the head of shaft-like lock pin; 10. Handheld Division; 11. rotate chamber; The afterbody of 12. shaft-like lock pins; 13. inclined-planes; 14. springs; 15. elastic positioning pins; 16. first locating slots; 17. snap rings; 18. pin rods; 19. plungers; 20. second springs.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment: shown in accompanying drawing 1 ~ 6, a kind of adjustable for height combination ladder, described combination ladder comprises manhole ladder 1, outside staircase 2 and the locking device for locking manhole ladder 1 and outside staircase 2, the cleat stanchion of described outside staircase 2 is sheathed on the cleat stanchion of described manhole ladder 1, the cleat stanchion of described outside staircase 2 offers outer lock hole 3 along its thickness direction, and on the cleat stanchion of described manhole ladder 1, corresponding described outer lock hole 3 offers multiple interior lock hole 4 along the length direction of the cleat stanchion of manhole ladder 1; Described locking device is fixedly arranged on the described outer lock hole place 3 on the cleat stanchion of described outside staircase 2, is reached the object of location manhole ladder 1 and outside staircase 2 position relationship, namely reach the locking to combination ladder by the locking of simultaneously externally lock hole 3 and a certain interior lock hole 4;
Described locking device comprises pedestal 5 and handle 6 two parts; Wherein,
Described pedestal 5 is fixedly arranged on the cleat stanchion of described outside staircase 2, offers a column chamber 7 in pedestal 5, and this column chamber 7 wears for a shaft-like lock pin 8, and the corresponding described outer lock hole 3 of this column chamber 7 is arranged; Described shaft-like lock pin 8 moves back and forth in column chamber 7, and the head 9 forming shaft-like lock pin 8 stretches into or shift out described interior lock hole 4 via described outer lock hole 3, thus realizes described locking device the locking and unlocking to combination ladder; When the head 9 of described shaft-like lock pin 8 stretches in described interior lock hole 4, being the lock-out state of described combination ladder, when the head 9 of described shaft-like lock pin 8 shifts out in described interior lock hole 4, is then the released state of described combination ladder;
Described handle 6 rotates the outside being arranged at described pedestal 5, has a Handheld Division 10; The inner side of handle 6 is arranged with a rotation chamber 11, and this rotation chamber 11 is set on pedestal 5, forms described handle 6 with pedestal 5 for axle rotates; The afterbody 12 of described shaft-like lock pin 8 stretches out described pedestal 5 vertically outwardly and is positioned on described handle 6, forms described shaft-like lock pin 8 and described handle 6 synchronous shift in the axial direction; The multiple inclined-planes 13 cooperatively interacted are provided with between the inwall of described rotation chamber 11 and the outer wall of described pedestal 5, form when described handle 6 rotates, handle 6 can realize axial displacement outwardly, and draw described shaft-like lock pin 8 whereby towards outer displacement, the head 9 of shaft-like lock pin 8 is shifted out described interior lock hole 4, unlocks described combination ladder;
Wherein, described shaft-like lock pin 8 is arranged with a spring 14, one end of this spring 14 is resisted against the head 9 of shaft-like lock pin 8, and the other end is then resisted against in described column chamber 7; When described combination ladder is lock-out state, described shaft-like lock pin 8 stretches in described interior lock hole 4 inwardly, and described spring 14 is in the state upheld completely, and when described combination ladder is released state, described handle 6 drives shaft-like lock pin 8 towards outer displacement, and described spring 14 is in by the state compressed;
Also be provided with an elastic positioning pin 15 in described handle 6, this elastic positioning pin 15 is arranged towards the outer wall of described pedestal 5, to being provided with two locating slots by elastic positioning pin 15 on the outer wall of pedestal 5; Design whereby, when described handle 6 turns to the lock-out state position of combination ladder, the first locating slot 16 that described elastic positioning pin 15 will snap in automatically near outside staircase 2, realizes the maintenance to combination ladder lock-out state; And when described handle 6 turns to the released state position of combination ladder, described elastic positioning pin 15 will snap in second locating slot (not drawing in figure) of outer end automatically, realize the maintenance to combination ladder released state.
Wherein, the afterbody 12 of described shaft-like lock pin 8 is positioned, on described handle 6, also to be located by other location structures, not enumerate by snap ring 17 or clip spring structure.
Wherein, by the setting on described inclined-plane 13, make described handle 6 can realize axially-movable by rotation; And the setting on multiple inclined-plane 13, the stationarity that the further lifting handle 6 of energy rotates, improves the feel of operator.
Wherein, described elastic positioning pin 15 has pin rod 18 and plunger 19 two parts, and the corresponding described locating slot of described plunger 19 is arranged, and described pin rod 18 is arranged with one second spring 20, one end of this second spring 20 is resisted against described plunger 19, and the other end is then resisted against in described handle 6.Described elastic positioning pin 15 can also adopt other form of structure, as the form of spring joined by ball.
A kind of adjustable for height combination ladder of the present invention, comprises manhole ladder, outside staircase and the locking device for locking interior outside staircase; This locking device comprises pedestal and is sheathed on the handle on pedestal, wherein be equipped with a shaft-like lock pin in pedestal, the afterbody of this shaft-like lock pin passes pedestal and is connected with handle and locates, form and link with handle, move reciprocatingly, thus make the head of shaft-like lock pin stretch into or shift out interior lock hole via outer lock hole, and then lock or unlock combination ladder.Compared to existing technologies, the present invention is rational in infrastructure, particularly by the cooperation on inclined-plane multiple between pedestal and handle, makes the rotation of handle to realize axially-movable, can also protect the facility of the steady of rotation and operation; Additionally by the setting of spring sheathed on shaft-like lock pin and elastic positioning pin, the reliability that combination ladder locks can also be ensured, solve the contradiction that prior art exists in locking reliability and operation ease.To sum up, the present invention has the advantages such as rational in infrastructure, operation is convenient, safe and reliable, may be used for various types of combination ladder.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (2)
1. an adjustable for height combination ladder, described combination ladder comprises manhole ladder, outside staircase and the locking device for locking manhole ladder and outside staircase, the cleat stanchion of described outside staircase is sheathed on the cleat stanchion of described manhole ladder, the cleat stanchion of described outside staircase offers outer lock hole along its thickness direction, and on the cleat stanchion of described manhole ladder, corresponding described outer lock hole offers multiple interior lock hole along the length direction of the cleat stanchion of manhole ladder; Described locking device is fixedly arranged on the described outer lock hole place on the cleat stanchion of described outside staircase, is reached the object of location manhole ladder and outside staircase position relationship, namely reach the locking to combination ladder by the locking of simultaneously externally lock hole and a certain interior lock hole; It is characterized in that:
Described locking device comprises pedestal and handle two parts; Wherein,
Described pedestal is fixedly arranged on the cleat stanchion of described outside staircase, offers a column chamber in pedestal, and this column chamber wears for a shaft-like lock pin, and the corresponding described outer lock hole of this column chamber is arranged; Described shaft-like lock pin moves back and forth in column chamber, and the head forming shaft-like lock pin stretches into or shift out described interior lock hole via described outer lock hole, thus realizes described locking device the locking and unlocking to combination ladder; When the head of described shaft-like lock pin stretches in described interior lock hole, being the lock-out state of described combination ladder, when the head of described shaft-like lock pin shifts out in described interior lock hole, is then the released state of described combination ladder;
Described handle rotates the outside being arranged at described pedestal, has a Handheld Division; The inner side of handle is arranged with a rotation chamber, and this rotation chamber is set on pedestal, and forming described handle is that axle rotates with pedestal; The afterbody of described shaft-like lock pin stretches out described pedestal outwardly vertically and is positioned on described handle, forms described shaft-like lock pin and described handle synchronous shift in the axial direction; The multiple inclined-planes cooperatively interacted are provided with between the inwall of described rotation chamber and the outer wall of described pedestal, form when described handle rotates, handle can realize axial displacement outwardly, and draw the displacement outwardly of described shaft-like lock pin whereby, the head of shaft-like lock pin is shifted out described interior lock hole, unlocks described combination ladder;
Wherein, described shaft-like lock pin is arranged with a spring, one end of this spring is resisted against the head of shaft-like lock pin, and the other end is then resisted against in described column chamber; When described combination ladder is lock-out state, described shaft-like lock pin stretches in described interior lock hole inwardly, and described spring is in the state upheld completely, and when described combination ladder is released state, described handle strip lever shape lock pin is towards outer displacement, and described spring is in by the state compressed;
Also be provided with an elastic positioning pin in described handle, this elastic positioning pin is arranged towards the outer wall of described pedestal, to being provided with two locating slots by elastic positioning pin on the outer wall of pedestal; Design whereby, when described handle turns to the lock-out state position of combination ladder, the first locating slot that described elastic positioning pin will snap in automatically near outside staircase, realizes the maintenance to combination ladder lock-out state; And when described handle turns to the released state position of combination ladder, described elastic positioning pin will snap in the second locating slot of outer end automatically, realize the maintenance to combination ladder released state.
2. combination ladder according to claim 1, it is characterized in that: described elastic positioning pin has pin rod and plunger two parts, the corresponding described locating slot of described plunger is arranged, described pin rod is arranged with one second spring, one end of this second spring is resisted against described plunger, and the other end is then resisted against in described handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033751.2A CN105525862B (en) | 2016-01-19 | 2016-01-19 | A kind of adjustable for height combination ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033751.2A CN105525862B (en) | 2016-01-19 | 2016-01-19 | A kind of adjustable for height combination ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105525862A true CN105525862A (en) | 2016-04-27 |
| CN105525862B CN105525862B (en) | 2018-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610033751.2A Active CN105525862B (en) | 2016-01-19 | 2016-01-19 | A kind of adjustable for height combination ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105525862B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804634A (en) * | 2016-05-13 | 2016-07-27 | 苏州飞华铝制工业有限公司 | Ladder foot with retractable supporting structure of ladder |
| CN113047766A (en) * | 2021-04-02 | 2021-06-29 | 苏州莱恩精工合金股份有限公司 | Internal and external ladder locking device and multifunctional ladder comprising same |
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| CN200985736Y (en) * | 2006-12-15 | 2007-12-05 | 王万兴 | Telescopic ladder having anti-hand clipping mechanism |
| CN200999587Y (en) * | 2007-01-31 | 2008-01-02 | 乐瑞商务咨询(上海)有限公司 | Locking mechanism for ladder |
| CN201632982U (en) * | 2009-10-27 | 2010-11-17 | 上海永乾机电有限公司 | Inclined surface pulling type lock pin mechanism |
| JP3195089U (en) * | 2014-10-15 | 2014-12-25 | 特殊梯子製作所有限会社 | Evacuation ladder |
| CN204851040U (en) * | 2015-07-14 | 2015-12-09 | 余登会 | Power maintenance ladder |
| CN205532248U (en) * | 2016-01-19 | 2016-08-31 | 苏州飞华铝制工业有限公司 | Height -adjustable's combination ladder |
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2016
- 2016-01-19 CN CN201610033751.2A patent/CN105525862B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200985736Y (en) * | 2006-12-15 | 2007-12-05 | 王万兴 | Telescopic ladder having anti-hand clipping mechanism |
| CN200999587Y (en) * | 2007-01-31 | 2008-01-02 | 乐瑞商务咨询(上海)有限公司 | Locking mechanism for ladder |
| CN201632982U (en) * | 2009-10-27 | 2010-11-17 | 上海永乾机电有限公司 | Inclined surface pulling type lock pin mechanism |
| JP3195089U (en) * | 2014-10-15 | 2014-12-25 | 特殊梯子製作所有限会社 | Evacuation ladder |
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| CN205532248U (en) * | 2016-01-19 | 2016-08-31 | 苏州飞华铝制工业有限公司 | Height -adjustable's combination ladder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804634A (en) * | 2016-05-13 | 2016-07-27 | 苏州飞华铝制工业有限公司 | Ladder foot with retractable supporting structure of ladder |
| CN113047766A (en) * | 2021-04-02 | 2021-06-29 | 苏州莱恩精工合金股份有限公司 | Internal and external ladder locking device and multifunctional ladder comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105525862B (en) | 2018-01-09 |
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