CN105221064A - A kind of locking device of combination ladder - Google Patents
A kind of locking device of combination ladder Download PDFInfo
- Publication number
- CN105221064A CN105221064A CN201510696752.0A CN201510696752A CN105221064A CN 105221064 A CN105221064 A CN 105221064A CN 201510696752 A CN201510696752 A CN 201510696752A CN 105221064 A CN105221064 A CN 105221064A
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- snap close
- housing
- lock
- pressing shell
- cleat stanchion
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Abstract
A locking device for combination ladder, is characterized in that comprising Connection Block, snap close fork and pressing shell; The pedestal of Connection Block is fixedly arranged on outside staircase, and front end is provided with first and is rotationally connected a little, and rear end is provided with second and is rotationally connected a little; Body of rod head downward projection one lock pin of snap close fork, upwards projection one service portion, body of rod rear end is articulated with second and is rotationally connected a little; The case cover of pressing shell is located at the outside of snap close fork, and front-end and back-end are all upturned, and middle part is articulated with first and is rotationally connected a little, forms lever construction; The front end of housing and the head of the body of rod link; Be provided with the first spring in pressing shell, the first spring is to being located between pressing shell and snap close fork; Also be provided with lock slider in pressing shell, lock slider does front-rear reciprocation movement on the inwall of housing; There is a positioning port rear end of Connection Block, extends into positioning port and coordinate with it before lock slider.Structure of the present invention is more simple, has processing cost and the low advantage of cost of labor, simultaneously easy to operate.
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 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 can arrange locking device between the cleat stanchion of interior outside staircase, traditional locking device structure is too complicated, causes the high of processing cost and cost of labor.
Therefore, how to solve the deficiency that above-mentioned prior art exists, just become the problem that the present invention will research and solve.
Summary of the invention
The invention provides a kind of locking device of combination ladder, its object is to solve prior art processing cost and the higher problem of cost of labor.
For achieving the above object, the technical solution used in the present invention is: a kind of locking device of combination ladder, described combination ladder comprises 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, by the locking of external lock hole and a certain interior lock hole simultaneously and then the position relationship of location manhole ladder and outside staircase; Described locking device comprises Connection Block, snap close fork and pressing shell;
Described Connection Block has a pedestal, and this pedestal is fixedly arranged on the cleat stanchion of described outside staircase, and the front end of pedestal is provided with first and is rotationally connected a little, and the rear end of pedestal is provided with second and is rotationally connected a little;
Described snap close fork has a body of rod, head corresponding described outer lock hole projection one lock pin downwards of the body of rod, upwards projection one service portion; The rear end of this body of rod is articulated with described second and is rotationally connected a little, and the cleat stanchion forming described snap close fork relatively described outside staircase on described Connection Block swings, and described lock pin is had stretch into outer lock hole and deviate from outer lock hole two states;
Described pressing shell has a housing, and this case cover is located at the outside of described snap close fork; The front-end and back-end of described housing are all upturned, and the middle part of housing is articulated with described first and is rotationally connected a little, form lever construction; The front end of described housing and the service portion location fit of the described body of rod, the head of the front end and the body of rod that form described housing links;
Wherein, in described pressing shell, be also provided with one first spring, between the inwall that this first spring is located at pressing shell along the swaying direction of described snap close fork and snap close fork, and be positioned at described first and be rotationally connected rear a little; Described first spring orders about the rear end of described pressing case body upwards, and then the front end of housing is fitted in downwards on the cleat stanchion of described outside staircase, thus the lock pin ordering about described snap close fork keeps the state stretching into described outer lock hole;
Also be provided with a lock slider in described pressing shell, this lock slider slides along the length direction of the housing of described pressing shell and is positioned the rear end of housing, the inwall of described housing to do front-rear reciprocation movement, has retrude and two states of protracting; The corresponding described lock slider in rear end of described Connection Block pedestal is provided with a positioning port, extend into described positioning port before described lock slider to coordinate with it, thus the rear end locking described pressing case body fits on the cleat stanchion of described outside staircase downwards, now the front end of described housing tilts due to leverage, thus makes the lock pin of described snap close fork keep throwing off the state of described outer lock hole.
Related content in technique scheme is explained as follows:
1. in such scheme, the front end of described housing offers locating hole, and the service portion of the described body of rod stretches in this locating hole and engages with described locating hole, and the head of the front end and the body of rod that form described housing links.The front end of described housing is also reached and the coordinating of the service portion of the described body of rod by arranging the form of structure such as limited block, does not repeat one by one.
2. in such scheme, the tension force of described first spring is by the rear end upwards jack-up of described pressing case body, due to leverage, the front end of housing then fits in downwards on the cleat stanchion of described outside staircase, because the head of the front end of housing and the body of rod of described snap close fork links, therefore the lock pin of the described body of rod will keep the state stretching into described outer lock hole.
3. in such scheme, during described lock slider slides and is arranged in the rear end of housing a locating slot, and the range of a limit point limitation locking slide block by projection on housing.
4., in such scheme, the corresponding described positioning port of head of described lock slider is arranged, and be provided with one second spring between the afterbody of lock slider and described housing, the head that this second spring orders about described lock slider outwards moves;
The oral area outer rim of described positioning port is arc shaped, when described lock slider is moved down with the rear end of described pressing shell, retrude state can be become from the state of protracting before during positioning port described in the head contact of described lock slider, after the head of described lock slider continues to enter described positioning port downwards, the head of lock slider reverts to by retrude state the state of protracting again, and the contraposition of reaching described lock slider and described positioning port coordinates locking.
5., in such scheme, described lock slider is also replaced the second spring by other form of structure and is realized moving back and forth, but due to structure more complicated than the second spring, therefore not elect.
Operating principle of the present invention and advantage as follows:
The locking device of a kind of combination ladder of the present invention, comprises Connection Block, snap close fork and pressing shell.Wherein, Connection Block is fixed in the outside staircase of combination ladder, has former and later two and is rotationally connected a little.The head of snap close fork is provided with lock pin and service portion, and rear end is articulated with being rotationally connected a little of Connection Block rear portion.Pressing jacket is located at the outside of snap close fork, and two ends are upturned, and what middle part was articulated with Connection Block front portion is rotationally connected a little, in lever construction.The service portion of snap close fork is connected with the leading portion in pressing shell, and the formation pressing front end of shell and the head of snap close fork link.The first spring is also provided with in pressing shell, between the inwall that pressing shell is located at by this first spring and snap close fork, order about the rear end of pressing shell upwards, and then the front end of pressing shell is fitted on the cleat stanchion of outside staircase downwards, thus the lock pin ordering about snap close fork keeps the state stretching into outer lock hole; Also be provided with lock slider in pressing shell, this lock slider does front-rear reciprocation movement on the inwall of pressing shell; The corresponding lock slider in rear end of Connection Block is provided with positioning port, extend into positioning port before lock slider to coordinate with it, thus the rear end of locking pressing shell fits in downwards on the cleat stanchion of outside staircase, the front end now pressing shell tilts due to leverage, thus makes the lock pin of snap close fork keep throwing off the state of outer lock hole.Design whereby, compared to existing technologies, structure is more simple in the present invention, therefore has processing cost and the low advantage of cost of labor, simultaneously easy to operate.
Accompanying drawing explanation
Accompanying drawing 1 is the using state reference diagram (released state) of the embodiment of the present invention;
Accompanying drawing 2 is the using state reference diagram (lock-out state) of the embodiment of the present invention;
Accompanying drawing 3 is the structural representation one (released state) of the embodiment of the present invention;
Accompanying drawing 4 is the structural representation two (in locking process) of the embodiment of the present invention;
Accompanying drawing 5 is the structural representation three (lock-out state) of 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. Connection Block; 6. snap close fork; 7. press shell; 8. first be rotationally connected a little; 9. second be rotationally connected a little; 10. lock pin; 11. service portions; 12. locating holes; 13. first springs; 14. lock sliders; 15. locating slots; 16. limit points; 17. positioning ports; 18. 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 ~ 5, a kind of locking device of combination ladder, for vertically arranging state when locking device uses in figure, this case is then described with state during locking device horizontal positioned.
Described combination ladder comprises 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 described outer lock hole 3 place on the cleat stanchion of described outside staircase 2, by the locking of external lock hole 3 and a certain interior lock hole 4 simultaneously and then the position relationship of location manhole ladder 1 and outside staircase 2; Described locking device comprises Connection Block 5, snap close fork 6 and pressing shell 7;
Described Connection Block 5 has a pedestal, and this pedestal is fixedly arranged on the cleat stanchion of described outside staircase 2, and the front end of pedestal is provided with first and is rotationally connected a little 8, and the rear end of pedestal is provided with second and is rotationally connected a little 9;
Described snap close fork 6 has a body of rod, head corresponding described outer lock hole 3 projection one lock pin 10 downwards of the body of rod, upwards projection one service portion 11; The rear end of this body of rod is articulated with described second and is rotationally connected a little 9, and the cleat stanchion forming described snap close fork 6 relatively described outside staircase 2 on described Connection Block 5 swings, and described lock pin 10 is had stretch into outer lock hole 3 and deviate from outer lock hole 3 two states;
Described pressing shell 7 has a housing, and this case cover is located at the outside of described snap close fork 6; The front-end and back-end of described housing are all upturned, and the middle part of housing is articulated with described first and is rotationally connected a little 8, forms lever construction; The front end of described housing offers locating hole 12, and the service portion 11 of the described body of rod stretches in this locating hole 12 and engages with described locating hole 12, and the head of the front end and the body of rod that form described housing links.
Wherein, be also provided with one first spring 13 in described pressing shell 7, this first spring 13 is arranged at along the swaying direction of described snap close fork 6 rear that described first is rotationally connected a little 8; The upper end of the first spring 13 is resisted against the inwall of described pressing shell 7, and lower end abutment is on the body of rod of described snap close fork 6; The tension force of described first spring 13 is by the rear end upwards jack-up of described pressing shell 7 housing, due to leverage, the front end of housing then fits on the cleat stanchion of described outside staircase 2 downwards, because the head of the front end of housing and the body of rod of described snap close fork 6 links, therefore the lock pin 10 of the described body of rod will keep the state stretching into described outer lock hole 3.
A lock slider 14 is also provided with in described pressing shell 7, this lock slider 14 is positioned in the locating slot 15 in the rear end of housing along the length direction slip of the housing of described pressing shell 7, the inwall of described housing does front-rear reciprocation movement, there is retrude and two states of protracting; Described lock slider 14 is by the range of a limit point 16 limitation locking slide block 14 of projection on housing.The corresponding described lock slider 14 in rear end of described Connection Block 5 pedestal is provided with a positioning port 17, extend into described positioning port 17 before described lock slider 14 to coordinate with it, thus the rear end locking described pressing shell 7 housing fits on the cleat stanchion of described outside staircase 2 downwards, now the front end of described housing tilts due to leverage, thus makes the lock pin 10 of described snap close fork 6 keep throwing off the state of described outer lock hole 3.
Wherein, the corresponding described positioning port 17 of head of described lock slider 14 is arranged, and be provided with one second spring 18 between the afterbody of lock slider 14 and described housing, the head that this second spring 18 orders about described lock slider 14 outwards moves;
The oral area outer rim of described positioning port 17 is arc shaped, when described lock slider 14 is moved down with the rear end of described pressing shell 7, retrude state can be become from the state of protracting before during positioning port 17 described in the head contact of described lock slider 14, after the head of described lock slider 14 continues to enter described positioning port 17 downwards, the head of lock slider 14 reverts to by retrude state the state of protracting again, and the contraposition of reaching described lock slider 14 and described positioning port 17 coordinates locking.
Now just operating principle of the present invention is described as follows: start, the outer lock hole in outside staircase deviate from by the lock pin of snap close fork, and the outside staircase of combination ladder and manhole ladder are in nonlocking relative sliding state; Then, adjustment outside staircase and the position of manhole ladder, arrive the combination ladder overall height that user expects, and make lock hole contraposition on outer lock hole in outside staircase and manhole ladder instantly; Again, press the front end of pressing shell, the head of interlock snap close fork is downward, the lock pin of snap close fork is made to stretch into outer lock hole and interior lock hole, and then the position relationship of locking manhole ladder and outside staircase, now because the first spring continues the rear end upwards forcing in pressing shell, and the lever construction design owing to pressing shell, therefore the downward trend pressing case nose is kept, and namely keeps the lock pin of snap close fork to the locking of manhole ladder and outside staircase; To remove the locking of manhole ladder and outside staircase, the tension force then overcoming the first spring presses the rear end of pressing shell downwards, lift the front end of pressing shell, and then make the lock pin of snap close fork deviate from outer lock hole and interior lock hole, now the head of lock slider enters in the positioning port of Connection Block, keeps released state of the present invention.
The locking device of a kind of combination ladder of the present invention, comprises Connection Block, snap close fork and pressing shell.Wherein, Connection Block is fixed in the outside staircase of combination ladder, has former and later two and is rotationally connected a little.The head of snap close fork is provided with lock pin and service portion, and rear end is articulated with being rotationally connected a little of Connection Block rear portion.Pressing jacket is located at the outside of snap close fork, and two ends are upturned, and what middle part was articulated with Connection Block front portion is rotationally connected a little, in lever construction.The service portion of snap close fork is connected with the leading portion in pressing shell, and the formation pressing front end of shell and the head of snap close fork link.The first spring is also provided with in pressing shell, between the inwall that pressing shell is located at by this first spring and snap close fork, order about the rear end of pressing shell upwards, and then the front end of pressing shell is fitted on the cleat stanchion of outside staircase downwards, thus the lock pin ordering about snap close fork keeps the state stretching into outer lock hole; Also be provided with lock slider in pressing shell, this lock slider does front-rear reciprocation movement on the inwall of pressing shell; The corresponding lock slider in rear end of Connection Block is provided with positioning port, extend into positioning port before lock slider to coordinate with it, thus the rear end of locking pressing shell fits in downwards on the cleat stanchion of outside staircase, the front end now pressing shell tilts due to leverage, thus makes the lock pin of snap close fork keep throwing off the state of outer lock hole.Design whereby, compared to existing technologies, structure is more simple in the present invention, therefore has processing cost and the low advantage of cost of labor, simultaneously easy to operate.
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. the locking device of a combination ladder, described combination ladder comprises 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 by the locking of simultaneously externally lock hole and a certain interior lock hole; It is characterized in that: described locking device comprises Connection Block, snap close fork and pressing shell;
Described Connection Block has a pedestal, and this pedestal is fixedly arranged on the cleat stanchion of described outside staircase, and the front end of pedestal is provided with first and is rotationally connected a little, and the rear end of pedestal is provided with second and is rotationally connected a little;
Described snap close fork has a body of rod, head corresponding described outer lock hole projection one lock pin downwards of the body of rod, upwards projection one service portion; The rear end of this body of rod is articulated with described second and is rotationally connected a little, and the cleat stanchion forming described snap close fork relatively described outside staircase on described Connection Block swings, and described lock pin is had stretch into outer lock hole and deviate from outer lock hole two states;
Described pressing shell has a housing, and this case cover is located at the outside of described snap close fork; The front-end and back-end of described housing are all upturned, and the middle part of housing is articulated with described first and is rotationally connected a little, form lever construction; The front end of described housing and the service portion location fit of the described body of rod, the head of the front end and the body of rod that form described housing links;
Wherein, in described pressing shell, be also provided with one first spring, between the inwall that this first spring is located at pressing shell along the swaying direction of described snap close fork and snap close fork, and be positioned at described first and be rotationally connected rear a little; Described first spring orders about the rear end of described pressing case body upwards, and then the front end of housing is fitted in downwards on the cleat stanchion of described outside staircase, thus the lock pin ordering about described snap close fork keeps the state stretching into described outer lock hole;
Also be provided with a lock slider in described pressing shell, this lock slider slides along the length direction of the housing of described pressing shell and is positioned the rear end of housing, the inwall of described housing to do front-rear reciprocation movement, has retrude and two states of protracting; The corresponding described lock slider in rear end of described Connection Block pedestal is provided with a positioning port, extend into described positioning port before described lock slider to coordinate with it, thus the rear end locking described pressing case body fits on the cleat stanchion of described outside staircase downwards, now the front end of described housing tilts due to leverage, thus makes the lock pin of described snap close fork keep throwing off the state of described outer lock hole.
2. locking device according to claim 1, it is characterized in that: the corresponding described positioning port of head of described lock slider is arranged, be provided with one second spring between the afterbody of lock slider and described housing, the head that this second spring orders about described lock slider outwards moves;
The oral area outer rim of described positioning port is arc shaped, when described lock slider is moved down with the rear end of described pressing shell, retrude state can be become from the state of protracting before during positioning port described in the head contact of described lock slider, after the head of described lock slider continues to enter described positioning port downwards, the head of lock slider reverts to by retrude state the state of protracting again, and the contraposition of reaching described lock slider and described positioning port coordinates locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696752.0A CN105221064B (en) | 2015-10-23 | 2015-10-23 | Locking device of combined ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696752.0A CN105221064B (en) | 2015-10-23 | 2015-10-23 | Locking device of combined ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221064A true CN105221064A (en) | 2016-01-06 |
| CN105221064B CN105221064B (en) | 2017-01-04 |
Family
ID=54990288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510696752.0A Expired - Fee Related CN105221064B (en) | 2015-10-23 | 2015-10-23 | Locking device of combined ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221064B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593290A (en) * | 2016-12-26 | 2017-04-26 | 李曙英 | Locking device capable of conducting double-way rotation operation for combination ladder |
| WO2017151985A1 (en) | 2016-03-04 | 2017-09-08 | Wing Enterprises, Incorporated | Adjustment mechanisms, ladders incorporating same and related methods |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08158767A (en) * | 1994-12-05 | 1996-06-18 | Pika Corp:Kk | Lock device for expansion member |
| JPH116284A (en) * | 1997-06-17 | 1999-01-12 | Nippon Light Metal Co Ltd | Expansion leg for working bench |
| KR20090053455A (en) * | 2007-11-23 | 2009-05-27 | 장영수 | A ladder |
| CN202380969U (en) * | 2011-12-22 | 2012-08-15 | 应逢若 | Locking structure of extension ladder |
| CN205100859U (en) * | 2015-10-23 | 2016-03-23 | 苏州飞华铝制工业有限公司 | Locking device of combination ladder |
-
2015
- 2015-10-23 CN CN201510696752.0A patent/CN105221064B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08158767A (en) * | 1994-12-05 | 1996-06-18 | Pika Corp:Kk | Lock device for expansion member |
| JPH116284A (en) * | 1997-06-17 | 1999-01-12 | Nippon Light Metal Co Ltd | Expansion leg for working bench |
| KR20090053455A (en) * | 2007-11-23 | 2009-05-27 | 장영수 | A ladder |
| CN202380969U (en) * | 2011-12-22 | 2012-08-15 | 应逢若 | Locking structure of extension ladder |
| CN205100859U (en) * | 2015-10-23 | 2016-03-23 | 苏州飞华铝制工业有限公司 | Locking device of combination ladder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017151985A1 (en) | 2016-03-04 | 2017-09-08 | Wing Enterprises, Incorporated | Adjustment mechanisms, ladders incorporating same and related methods |
| EP3423664A4 (en) * | 2016-03-04 | 2019-10-16 | Wing Enterprises, Incorporated | Adjustment mechanisms, ladders incorporating same and related methods |
| US11421475B2 (en) | 2016-03-04 | 2022-08-23 | Little Giant Ladder Systems, Llc | Adjustment mechanisms, ladders incorporating same and related methods |
| CN106593290A (en) * | 2016-12-26 | 2017-04-26 | 李曙英 | Locking device capable of conducting double-way rotation operation for combination ladder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105221064B (en) | 2017-01-04 |
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Effective date of registration: 20200525 Address after: Utah, USA Patentee after: Little giant Address before: 215164 Jiangsu city of Suzhou province Wuzhong District Xu Kou Zhen Mao Peng Lu, No. 109 Patentee before: SUZHOU PICA ALUMINUM INDUSTRY Ltd. |
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Granted publication date: 20170104 Termination date: 20211023 |
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