CN105221063B - Novel locking device of combined ladder - Google Patents
Novel locking device of combined ladder Download PDFInfo
- Publication number
- CN105221063B CN105221063B CN201510695843.2A CN201510695843A CN105221063B CN 105221063 B CN105221063 B CN 105221063B CN 201510695843 A CN201510695843 A CN 201510695843A CN 105221063 B CN105221063 B CN 105221063B
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- snap close
- lock
- head
- cleat stanchion
- rod
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Abstract
The invention relates to a novel locking device of a combined ladder. The locking device is characterized by comprising a connecting seat, a lock buckle swinging rod and a pressing case, wherein a seat body of the connecting seat is fixedly arranged at an outer ladder; the front end of the seat body is provided with a first rotating connecting point; the back end of the seat body is provided with a second rotating connecting point; the end part of a rod body of the lock buckle swinging rod is downwards and convexly provided with a lock pin, and is upwards and convexly provided with an acting part; the back end of the rod body is hinged to the second rotating connecting point; a casing of the pressing case is arranged at the outer side of the lock buckle swinging rod in a covering way; the front end and the back end of the casing upwards warp, and the middle part of the casing is hinged to the first rotating connecting point, so that a lever structure is formed; the front end of the casing is linked with the end part of the rod body; a first spring is arranged in the pressing case; the first spring is arranged between the pressing case and the locking buckle swinging rod in a butted manner; a locking slide block is also arranged in the pressing case; the locking slide block does forward and backward reciprocating motion on the inner wall of the casing; the back end of the connecting seat is provided with a positioning opening; and the locking slide block forwards extends to enter the positioning opening to be matched with the positioning opening. The novel locking device of the combined ladder has the advantages that the structure is simple; the processing cost and the labor cost are low; and meanwhile, the operation is convenient.
Description
Technical field
The present invention relates to combination ladder, be specifically related to a kind of locking device for locking combination ladder inside and outside ladder cleat stanchion.
Background technology
Ladder, is the common tool climbed 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, and as when the limit that user needs the height climbed to a higher point to exceed ladder, now ladder just cannot meet the requirement climbed to a higher point.
In order to solve this problem, industry has invented a kind of combination ladder, and this combination ladder includes manhole ladder and outside staircase two parts, and the cleat stanchion of outside staircase is set on the cleat stanchion of manhole ladder, constitute described outside staircase to slide up and down on manhole ladder, climb to a higher point the effect of the limit reaching to increase ladder entirety.In order to lock the cleat stanchion of the outside staircase position on the cleat stanchion of manhole ladder, it will usually arranging locking device between the cleat stanchion of interior outside staircase, traditional locking device structure is the most complicated, cause the high of processing cost and cost of labor.
Therefore, how to solve the deficiency that above-mentioned prior art exists, become as present invention problem to be researched and solved.
Summary of the invention
The present invention provides the locking device of a kind of combination ladder, its object is to solve prior art processing cost and the higher problem of cost of labor.
For reaching above-mentioned purpose, the technical solution used in the present invention is: the locking device of a kind of combination ladder, described combination ladder includes manhole ladder and outside staircase, the cleat stanchion of described outside staircase is sheathed on the cleat stanchion of described manhole ladder, offering outer lock hole along its thickness direction on the cleat stanchion of described outside staircase, 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;At the described outer lock hole that described locking device is fixedly arranged on the cleat stanchion of described outside staircase, by the most externally lock hole and the locking of a certain interior lock hole and then location manhole ladder and the position relationship of outside staircase;Described locking device includes connecting seat, snap close fork and pressing shell;
Described connection seat has a pedestal, and this pedestal is fixedly arranged on the cleat stanchion of described outside staircase, and the middle part 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, the most corresponding described outer lock hole projection one lock pin of head 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 constituting described snap close fork the most described outside staircase on described connection seat swings, and makes described lock pin have and stretch into outer lock hole and abjection two states of outer lock hole;
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, constitute lever construction;The front end of described housing and the service portion location fit of the described body of rod, constitute the front end of described housing and the head linkage of the body of rod;
Wherein, being additionally provided with one first spring in described pressing shell, this first spring is located between inwall and the snap close fork of pressing shell along the swaying direction of described snap close fork, and is positioned at described first and is rotationally connected rear a little;Described first spring orders about the rear end of described pressing case body upwards, and then makes the front end of housing fit in downwards on the cleat stanchion of described outside staircase, thus the state of described outer lock hole is stretched in the lock pin holding ordering about described snap close fork;
Being additionally provided with a lock slider in described connection seat, this lock slider is slidingly positioned in the front end connecting seat along described connection seat length direction, does front-rear reciprocation movement on described connection seat, has retraction and two states of extension;The corresponding described lock slider of the back head of the described snap close fork body of rod is provided with a positioning port, described positioning port is extended into matched before described lock slider, thus the rear end locking described pressing case body fits in downwards on the cleat stanchion of described outside staircase, the front end of the most described housing tilts due to leverage, so that the lock pin of described snap close fork keeps the state disengaging described outer lock hole.
Relevant content in technique scheme is explained as follows:
1. in such scheme, the front end of described housing offers hole, location, and the service portion of the described body of rod stretches in this hole, location, constitutes the front end of described housing and the head linkage of the body of rod.Coordinating of service portion with the described body of rod is reached also by versions such as arranging limited block in the front end of described housing, repeats the most 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 fits in downwards on the cleat stanchion of described outside staircase, owing to linking with the head of the body of rod of described snap close fork in the front end of housing, the state of described outer lock hole is stretched in holding by the lock pin of the most described body of rod.
3., in such scheme, described lock slider is slideably positioned in a locating slot of the front end connecting seat.
4., in such scheme, the corresponding described positioning port of the head of described lock slider is arranged, and the afterbody of lock slider is provided with one second spring with described connection between seat, and the head that this second spring orders about described lock slider moves out;
The oral area outer rim of described positioning port is arc shaped, when described positioning port is moved upward with the head of the body of rod of described snap close fork, retraction state can be become from extension state before during positioning port described in the head contact of described lock slider, after described positioning port continues up and the head of lock slider is entered described positioning port, the head of lock slider is extension state by retraction recovering state again, and the para-position reaching described lock slider and described positioning port coordinates locking.
5., in such scheme, described lock slider is replaced the second spring also by other versions and is realized moving back and forth, and such as resilient key etc., owing to structure is increasingly complex than the second spring, therefore does not elects.
Operation principle and the advantage of the present invention are as follows:
The locking device of a kind of combination ladder of the present invention, including connecting seat, snap close fork and pressing shell.Wherein, connect seat and be fixed in the outside staircase of combination ladder, there are first, second two and be rotationally connected a little.The head of snap close fork is provided with lock pin and service portion, and rear end is articulated with second and is rotationally connected a little.Pressing jacket is located at the outside of snap close fork, and two ends are upturned, and middle part is articulated with first and is rotationally connected a little, in lever construction.The service portion of snap close fork is connected with in the leading portion of pressing shell, constitutes the front end of pressing shell and the head linkage of snap close fork.It is additionally provided with the first spring in pressing shell, this first spring is located between inwall and the snap close fork of pressing shell, order about the rear end of pressing shell upwards, and then make the front end of pressing shell fit in downwards on the cleat stanchion of outside staircase, thus the state of outer lock hole is stretched in the lock pin holding ordering about snap close fork;Being additionally provided with lock slider in connecting seat, this lock slider does front-rear reciprocation movement on the inwall of pressing shell;The rear side correspondence lock slider of the body of rod head of snap close fork is provided with positioning port, positioning port is extended into matched before lock slider, thus the rear end locking pressing shell fits in downwards on the cleat stanchion of outside staircase, now press the front end of shell and tilt, so that the lock pin of snap close fork keeps the state disengaging outer lock hole due to leverage.Designing whereby, compared to existing technologies, structure is the simplest for the present invention, therefore has processing cost and the low advantage of cost of labor, the most easy to operate.
Accompanying drawing explanation
Accompanying drawing 1 is the use state reference map (released state) of the embodiment of the present invention;
Accompanying drawing 2 is the use state reference map (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 (lock-out state) of the embodiment of the present invention.
In the figures above: 1. manhole ladder;2. outside staircase;Outer lock hole;4. lock hole in;5. connect seat;6. snap close fork;7. pressing shell;8. first it is rotationally connected a little;9. second it is rotationally connected a little;10. lock pin;11. service portions;12. hole, location;13. first springs;14. lock sliders;15. locating slots;17. positioning ports;18. second springs.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the invention will be further described:
Embodiment: see shown in accompanying drawing 1~4, the locking device of a kind of combination ladder, the state that is vertically arranged when using for locking device in figure, this case is then described with state during locking device horizontal positioned.
Described combination ladder includes 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, offering outer lock hole 3 along its thickness direction on the cleat stanchion of described outside staircase 2, 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;At the described outer lock hole 3 that described locking device is fixedly arranged on the cleat stanchion of described outside staircase 2, by the most externally lock hole 3 and the locking of a certain interior lock hole 4 and then location manhole ladder 1 and the position relationship of outside staircase 2;Described locking device includes connecting seat 5, snap close fork 6 and pressing shell 7;
Described connection seat 5 has a pedestal, and this pedestal is fixedly arranged on the cleat stanchion of described outside staircase 2, and the middle part 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 the most corresponding described outer lock hole 3 projection one lock pin 10 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 constituting described snap close fork 6 the most described outside staircase 2 on described connection seat 5 swings, and makes described lock pin 10 have and stretch into outer lock hole 3 and abjection 3 two states of outer lock hole;
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, constitutes lever construction;The front end of described housing offers hole 12, location, and the service portion 11 of the described body of rod stretches in this hole, location 12 and engages with hole, described location 12, constitutes the front end of described housing and the head linkage of the body of rod.
Wherein, being additionally provided with one first spring 13 in described pressing shell 7, this first spring 13 is arranged at described first along the swaying direction of described snap close fork 6 and is rotationally connected the rear of a little 8;The upper end of the first spring 13 is resisted against the inwall of described pressing shell 7, and lower end is resisted against 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 fits in downwards on the cleat stanchion of described outside staircase 2, owing to linking with the head of the body of rod of described snap close fork 6 in the front end of housing, the state of described outer lock hole 3 is stretched in holding by the lock pin 10 of the most described body of rod.
Being additionally provided with a lock slider 14 in described connection seat 5, this lock slider 14 is slidingly positioned in a locating slot 15 of the front end connecting seat 5 along described connection seat 5 length direction, does front-rear reciprocation movement on described connection seat 5, has retraction and two states of extension;The corresponding described lock slider 14 of the back head of described snap close fork 6 body of rod is provided with a positioning port 17, described positioning port 17 is extended into matched before described lock slider 14, thus the rear end locking described pressing shell 7 housing fits in downwards on the cleat stanchion of described outside staircase 2, the front end of the most described housing tilts due to leverage, so that the lock pin 10 of described snap close fork 6 keeps the state disengaging described outer lock hole 3.
Wherein, the corresponding described positioning port 17 of the head of described lock slider 14 is arranged, and the afterbody of lock slider 14 is provided with one second spring 18 with described connection between seat 5, and this second spring 18 orders about the head of described lock slider 14 and moves out;
The oral area outer rim of described positioning port 17 is arc shaped, when described positioning port 17 is moved upward with the head of the body of rod of described snap close fork 6, retraction state can be become from extension state before during positioning port 17 described in the head contact of described lock slider 14, after described positioning port 17 continues up and the head of lock slider 14 is entered described positioning port 17, the head of lock slider 14 is extension state by retraction recovering state again, and the para-position reaching described lock slider 14 and described positioning port 17 coordinates locking.
Now the operation principle with regard to the present invention is described as follows: start, and the outer lock hole in the lock pin abjection outside staircase of snap close fork, the outside staircase of combination ladder is in nonlocking relative sliding mode with manhole ladder;Then, adjust outside staircase and the position of manhole ladder, arrive user desired combination ladder total height, and make the interior lock hole para-position with on manhole ladder instantly of the outer lock hole in outside staircase;After again, press the front end of pressing shell, the head of linkage snap close fork is downward, the lock pin making snap close fork stretches into outer lock hole and interior lock hole, and then locking manhole ladder and the position relationship of outside staircase, now force in the rear end of pressing shell owing to the first spring continues upward, and due to the lever construction design of pressing shell, therefore the downward trend pressing case nose is maintained, and i.e. keeps the lock pin of snap close fork to manhole ladder and the locking of outside staircase;To release manhole ladder and the locking of outside staircase, the tension force then overcoming the first spring presses downwards the rear end of pressing shell, 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, during now the head of lock slider enters the positioning port of snap close fork, keep the released state of the present invention.
The locking device of a kind of combination ladder of the present invention, including connecting seat, snap close fork and pressing shell.Wherein, connect seat and be fixed in the outside staircase of combination ladder, there are first, second two and be rotationally connected a little.The head of snap close fork is provided with lock pin and service portion, and rear end is articulated with second and is rotationally connected a little.Pressing jacket is located at the outside of snap close fork, and two ends are upturned, and middle part is articulated with first and is rotationally connected a little, in lever construction.The service portion of snap close fork is connected with in the leading portion of pressing shell, constitutes the front end of pressing shell and the head linkage of snap close fork.It is additionally provided with the first spring in pressing shell, this first spring is located between inwall and the snap close fork of pressing shell, order about the rear end of pressing shell upwards, and then make the front end of pressing shell fit in downwards on the cleat stanchion of outside staircase, thus the state of outer lock hole is stretched in the lock pin holding ordering about snap close fork;Being additionally provided with lock slider in connecting seat, this lock slider does front-rear reciprocation movement on the inwall of pressing shell;The rear side correspondence lock slider of the body of rod head of snap close fork is provided with positioning port, positioning port is extended into matched before lock slider, thus the rear end locking pressing shell fits in downwards on the cleat stanchion of outside staircase, now press the front end of shell and tilt, so that the lock pin of snap close fork keeps the state disengaging outer lock hole due to leverage.Designing whereby, compared to existing technologies, structure is the simplest for the present invention, therefore has processing cost and the low advantage of cost of labor, the most easy to operate.
Above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this.All equivalence changes made according to spirit of the invention or modification, all should contain within protection scope of the present invention.
Claims (2)
1. the locking device of a combination ladder, described combination ladder includes manhole ladder and outside staircase, the cleat stanchion of described outside staircase is sheathed on the cleat stanchion of described manhole ladder, offering outer lock hole along its thickness direction on the cleat stanchion of described outside staircase, 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;At the described outer lock hole that described locking device is fixedly arranged on the cleat stanchion of described outside staircase, reach to position manhole ladder and the purpose of outside staircase position relationship by the locking of the most externally lock hole and a certain interior lock hole;It is characterized in that: described locking device includes connecting seat, snap close fork and pressing shell;
Described connection seat has a pedestal, and this pedestal is fixedly arranged on the cleat stanchion of described outside staircase, and the middle part 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, the most corresponding described outer lock hole projection one lock pin of head 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 constituting described snap close fork the most described outside staircase on described connection seat swings, and makes described lock pin have and stretch into outer lock hole and abjection two states of outer lock hole;
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, constitute lever construction;The front end of described housing and the service portion location fit of the described body of rod, constitute the front end of described housing and the head linkage of the body of rod;
Wherein, being additionally provided with one first spring in described pressing shell, this first spring is located between inwall and the snap close fork of pressing shell along the swaying direction of described snap close fork, and is positioned at described first and is rotationally connected rear a little;Described first spring orders about the rear end of described pressing case body upwards, and then makes the front end of housing fit in downwards on the cleat stanchion of described outside staircase, thus the state of described outer lock hole is stretched in the lock pin holding ordering about described snap close fork;
Being additionally provided with a lock slider in described connection seat, this lock slider is slidingly positioned in the front end connecting seat along described connection seat length direction, does front-rear reciprocation movement on described connection seat, has retraction and two states of extension;The corresponding described lock slider of the back head of the described snap close fork body of rod is provided with a positioning port, described positioning port is extended into matched before described lock slider, thus the rear end locking described pressing case body fits in downwards on the cleat stanchion of described outside staircase, the front end of the most described housing tilts due to leverage, so that the lock pin of described snap close fork keeps the state disengaging described outer lock hole.
Locking device the most according to claim 1, it is characterized in that: the corresponding described positioning port of the head of described lock slider is arranged, the afterbody of lock slider is provided with one second spring with described connection between seat, and the head that this second spring orders about described lock slider moves out;
The oral area outer rim of described positioning port is arc shaped, when described positioning port is moved upward with the head of the body of rod of described snap close fork, retraction state can be become from extension state before during positioning port described in the head contact of described lock slider, after described positioning port continues up and the head of lock slider is entered described positioning port, the head of lock slider is extension state by retraction recovering state again, and the para-position reaching described lock slider and described positioning port coordinates locking.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201510695843.2A CN105221063B (en) | 2015-10-23 | 2015-10-23 | Novel locking device of combined ladder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201510695843.2A CN105221063B (en) | 2015-10-23 | 2015-10-23 | Novel locking device of combined ladder |
Publications (2)
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CN105221063A CN105221063A (en) | 2016-01-06 |
CN105221063B true CN105221063B (en) | 2017-01-11 |
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CN201510695843.2A Expired - Fee Related CN105221063B (en) | 2015-10-23 | 2015-10-23 | Novel locking device of combined ladder |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10487576B2 (en) | 2016-03-04 | 2019-11-26 | Wing Enterprises, Incorporated | 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 |
CN111792516A (en) * | 2020-07-13 | 2020-10-20 | 安徽省雄峰起重机械有限公司 | Manned and cargo-carrying dual-purpose hanging basket for crane |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
CN205100860U (en) * | 2015-10-23 | 2016-03-23 | 苏州飞华铝制工业有限公司 | Novel locking device of combination ladder |
-
2015
- 2015-10-23 CN CN201510695843.2A patent/CN105221063B/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 |
CN205100860U (en) * | 2015-10-23 | 2016-03-23 | 苏州飞华铝制工业有限公司 | Novel locking device of combination ladder |
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CN105221063A (en) | 2016-01-06 |
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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: 20170111 Termination date: 20211023 |