CN111720041A - Platform extension ladder - Google Patents
Platform extension ladder Download PDFInfo
- Publication number
- CN111720041A CN111720041A CN201910225124.2A CN201910225124A CN111720041A CN 111720041 A CN111720041 A CN 111720041A CN 201910225124 A CN201910225124 A CN 201910225124A CN 111720041 A CN111720041 A CN 111720041A
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- China
- Prior art keywords
- ladder
- herringbone
- front body
- rear body
- assembly
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Classifications
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- 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
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
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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
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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
- E06C7/42—Ladder feet; Supports therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a platform extension ladder, which comprises: an ascending assembly; the ladder-climbing component is a herringbone ladder; the front body and the rear body of the herringbone ladder are both provided with a slidable lower ladder component; the front body of double ladder, the back body of double ladder and lower ladder subassembly all include: two pillars and a plurality of steps disposed between the two pillars; the outer side surfaces of the struts on one sides of the front body and the rear body of the herringbone ladder are respectively provided with a first sliding chute, and the lower ends of the first sliding chutes are respectively fixedly provided with a first sliding block; the lower ladder component and the herringbone ladder are provided with a first sliding chute, and the outer side surface of the strut at the same side of the herringbone ladder is provided with a second sliding chute; a second sliding block is fixedly arranged at the upper end of the second sliding groove at the upper end of the lower ladder assembly; the first sliding block is arranged in the second sliding groove in a sliding manner; the second sliding block is arranged in the first sliding groove in a sliding manner; the lower ends of the front body and the rear body of the herringbone ladder are provided with a bolt lock device and a connecting and fixing device which are connected with the lower ladder components corresponding to the bolt lock device in a locking way. Through the mode, the portable multifunctional chair is simple in structure, convenient to operate and more portable and has wider functions.
Description
Technical Field
The invention relates to an improvement of a platform ladder, in particular to a platform ladder with a simple structure; convenient operation, and is more portable and more extensive.
Background
The ladder is widely applied to various fields of production and life as a common climbing tool. The ladder is usually a straight ladder or a straight ladder, and the ladder body is slightly inclined to enable the top of the ladder to lean against a wall body when the ladder is used. When the position of the ladder to be erected is a guardrail or the wall is not high enough, the original top end of the ladder cannot be supported, and the ladder is easy to slip with a leaning object, so that potential safety hazards are brought; the extension ladder is a ladder which can be extended and shortened like a fishing rod and is divided into an engineering extension ladder and a bamboo joint extension ladder. It is very convenient to carry and store, and can be placed in a closet, a study room, under a bed or in a trunk of an automobile.
The conventional platform ladder in the prior art has no telescopic function and is limited to the use height.
Disclosure of Invention
The invention mainly solves the technical problem of providing a structure which is simple; the operation is convenient, the bolt is unlocked by pulling the outer side of the aluminum pipe by hand, and the grooves of the descending assembly are combined with the grooves of the herringbone ladder through the outer connecting blocks and the inner connecting blocks, so that the ascending and descending ladder can freely slide; the increased foot vessel increases the stability of the ladder more, and the platform extension ladder is more portable and has wider functions.
In order to achieve the purpose, the invention adopts the technical scheme that: a platform extension ladder, the extension ladder comprising: an ascending assembly; the ladder-climbing component is a herringbone ladder; the front body and the rear body of the herringbone ladder are both provided with slidable lower ladder components; the front body of the herringbone ladder, the rear body of the herringbone ladder and the lower ladder assembly all comprise: two pillars and a plurality of steps disposed between the two pillars; the outer side surfaces of the struts on one sides of the front body and the rear body of the herringbone ladder are respectively provided with a first sliding chute, and the lower ends of the first sliding chutes are respectively fixedly provided with a first sliding block; the outer side surface of the strut at the same side of the lower ladder assembly and the herringbone ladder, which are provided with the first sliding grooves, is provided with a second sliding groove; a second sliding block is fixedly arranged at the upper end of the second sliding groove at the upper end of the lower ladder assembly; the first sliding block is arranged in the second sliding groove in a sliding manner; the second sliding block is arranged in the first sliding groove in a sliding manner; the lower ends of the front body and the rear body of the herringbone ladder are provided with bolt lock devices which are in locking connection with the corresponding lower ladder components; and a fixing device is connected between the other sides of the front body and the rear body of the herringbone ladder and the same side of the upper end of the corresponding lower ladder component.
Preferably, the deadbolt lock mechanism includes: the front body or the rear body of the herringbone ladder is provided with an aluminum pipe; two ends of the aluminum pipe are respectively provided with a fixed seat; the fixed seat is fixedly arranged at the lower end of each strut of the front body or the rear body of the herringbone ladder; two ends of the aluminum pipe are positioned above the fixed seat and are fixedly provided with pin shafts; the middle part of the pin shaft is fixed on the aluminum pipe; one end of the pin shaft penetrates through one surface, close to the lower ladder assembly, of the front body or the rear body lower end support of the herringbone ladder and enters the corresponding fixing hole of the lower ladder assembly, and the other end of the pin shaft penetrates through the other surface of the front body or the rear body lower end support of the herringbone ladder; a clamp spring is arranged between the other side of the pin shaft, which is positioned at the lower end of the front body or the rear body of the herringbone ladder, of the strut and the aluminum pipe; and a spring is arranged between the other side of the pin shaft, which is positioned at the lower end of the front body or the rear body of the herringbone ladder, and the clamp spring.
Preferably, a stop block is arranged on one surface, close to the lower ladder assembly, of the aluminum pipe on the base.
Preferably, a plurality of fixing holes are formed in one surface, contacting with the front body or the rear body of the herringbone ladder, of the two support columns of the lower ladder assembly.
Preferably, grooves are formed in the inner sides and the outer sides of the front body strut or the rear body strut of the herringbone ladder on the other side and the corresponding strut of the lower ladder assembly; the connection fixing device includes: an outer connecting block and an inner connecting block; the outer connecting block is F-shaped; two bulges at one end of the outer connecting block are arranged in the grooves at the outer sides of the front body of the corresponding herringbone ladder, the rear body of the herringbone ladder and the support column at the other side of the corresponding lower ladder assembly, and the other end of the outer connecting block is fixed on the support column of the lower ladder assembly; one end of the inner side connecting block is F-shaped, and the other end of the inner side connecting block is inverted L-shaped; two protrusions at one end of the inner side connecting block in an F shape are arranged in grooves at the inner sides of the front body of the corresponding herringbone ladder, the rear body of the herringbone ladder and the corresponding support column at the other side of the lower ladder assembly, and one end of the inverted L shape is fixed with the support column of the lower ladder assembly.
Preferably, foot vessels are arranged on the outer sides of the lower ends of the two struts of the lower ladder assembly; the foot vessel is in a trapezoid shape; the length of the lower bottom edge of the foot dish is more than or equal to one third of the distance between the two support columns.
The invention has the beneficial effects that: the platform extension ladder is simple in structure; the operation is convenient, the bolt is unlocked by pulling the outer side of the aluminum pipe by hand, and the grooves of the descending assembly are combined with the grooves of the herringbone ladder through the outer connecting blocks and the inner connecting blocks, so that the ascending and descending ladder can freely slide; the increased foot dish further increases the stability of the ladder; more portable and more widely used.
Drawings
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
fig. 1 is a schematic structural view of a platform extension ladder according to the present invention.
Fig. 2 is an enlarged view of fig. 1A.
FIG. 3 is a schematic structural view of a connection fixing device according to the present invention
Wherein: 1. a herringbone ladder; 2. a step-down assembly; 3. a foot dish; 4. a step; 5. a latch lock device; 6. connecting and fixing devices; 7. an aluminum tube; 8. a fixed seat; 9. a shaft pin; 10. a clamp spring; 11. a spring; 12. a stopper; 13. an outer connecting block; 14. an inner side connecting block; 15. a strut of the front body or the rear body of the herringbone ladder; 16. a support of the step assembly.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1 to 3, the present invention includes:
in order to solve the technical problems, one technical scheme adopted by the invention is a platform extension ladder, which comprises: an ascending assembly; the ladder-climbing component is a herringbone ladder 1; the front body and the rear body of the herringbone ladder 1 are both provided with a slidable lower ladder component 2; the front body of the herringbone ladder 1, the rear body of the herringbone ladder 1 and the lower ladder assembly 2 all comprise: two pillars and a plurality of steps 4 provided between the two pillars; the outer side surfaces of the pillars on one sides of the front body and the rear body of the herringbone ladder 1 are respectively provided with a first sliding chute, and the lower ends of the first sliding chutes are respectively fixedly provided with a first sliding block; the outer side surface of the strut at the same side of the lower ladder component 2 and the herringbone ladder 1 with the first sliding grooves is provided with a second sliding groove; a second sliding block is fixedly arranged at the upper end of the second sliding groove at the upper end of the lower ladder assembly 2; the first sliding block is arranged in the second sliding groove in a sliding manner; the second sliding block is arranged in the first sliding groove in a sliding manner; the lower ends of the front body and the rear body of the herringbone ladder 1 are provided with bolt lock devices 5 which are in locking connection with the corresponding lower ladder components 2; and a fixing device 6 is connected between the other sides of the front body and the rear body of the herringbone ladder 1 and the same side of the upper end of the corresponding lower ladder component 2.
The latch lock device 5 includes: the front body or the rear body of the herringbone ladder 1 is provided with an aluminum pipe 7; two ends of the aluminum pipe 7 are respectively provided with a fixed seat 8; the fixed seat 8 is fixedly arranged at the lower end of each strut of the front body or the rear body of the herringbone ladder 1; two ends of the aluminum pipe 7 are positioned above the fixed seat 8 and are fixedly provided with pin shafts; the middle part of the pin shaft is fixed on the aluminum pipe 7; one end of the pin shaft penetrates through one surface, close to the lower ladder assembly 2, of the front body or the rear body lower end support of the herringbone ladder 1 and enters the corresponding fixing hole of the lower ladder assembly 2, and the other end of the pin shaft penetrates through the other surface of the front body or the rear body lower end support of the herringbone ladder 1; a clamp spring 10 is arranged between the other surface of the pin shaft, which is positioned at the lower end of the front body or the rear body of the herringbone ladder 1, of the strut and the aluminum pipe 7; a spring 11 is arranged between the other surface of the pin shaft, which is positioned at the lower end of the front body or the rear body of the herringbone ladder 1, of the strut and the clamp spring 10; and a stop block 12 is arranged on one side of the aluminum pipe 7 close to the lower ladder assembly 2 on the base.
And a plurality of fixing holes are formed in one surface of each of the two supporting columns of the descending ladder assembly 2, which is in contact with the front body or the rear body of the herringbone ladder 1.
Grooves are formed in the inner sides and the outer sides of the strut 15 of the front body or the rear body of the herringbone ladder on the other side and the strut 16 of the corresponding lower ladder component; the connection fixing device 6 includes: an outside connecting block 13 and an inside connecting block 14; the outer connecting block 13 is F-shaped; two bulges at one end of the outer connecting block 13 are arranged in the grooves at the outer sides of the strut 15 of the front body or the back body of the corresponding herringbone ladder and the strut 16 of the corresponding lower ladder assembly, and the other end of the outer connecting block is fixed on the strut 16 of the lower ladder assembly; one end of the inner side connecting block 14 is F-shaped, and the other end of the inner side connecting block is inverted L-shaped; two protrusions at one end of the inner side connecting block 14 in an F shape are arranged in grooves at the inner sides of a strut 15 of the front body or the rear body of the corresponding herringbone ladder and a strut 16 of the corresponding lower ladder assembly, and one end of the inverted L shape is fixed with the strut 16 of the lower ladder assembly.
When the ladder is used, the outer side of the aluminum pipe 7 is pulled by hand, the shaft pin 9 is separated from the hole on the support column, namely the pin is unlocked, so that the descending assembly 2 can slide up and down; and meanwhile, the herringbone ladder 1 is connected with the lower ladder assembly 2 in a sliding way by the connecting and fixing device 6.
The invention has the beneficial effects that: the platform extension ladder is simple in structure; the operation is convenient, the bolt is unlocked by pulling the outer side of the aluminum pipe by hand, and the grooves of the descending assembly are combined with the grooves of the herringbone ladder through the outer connecting blocks and the inner connecting blocks, so that the ascending and descending ladder can freely slide; the increased foot dish further increases the stability of the ladder; more portable and more widely used.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (6)
1. A platform extension ladder, the extension ladder comprising: an ascending assembly; the ladder-climbing component is a herringbone ladder; the method is characterized in that: the front body and the rear body of the herringbone ladder are both provided with slidable lower ladder components; the front body of the herringbone ladder, the rear body of the herringbone ladder and the lower ladder assembly all comprise: two pillars and a plurality of steps disposed between the two pillars; the outer side surfaces of the struts on one sides of the front body and the rear body of the herringbone ladder are respectively provided with a first sliding chute, and the lower ends of the first sliding chutes are respectively fixedly provided with a first sliding block; the outer side surface of the strut at the same side of the lower ladder assembly and the herringbone ladder, which are provided with the first sliding grooves, is provided with a second sliding groove; a second sliding block is fixedly arranged at the upper end of the second sliding groove at the upper end of the lower ladder assembly; the first sliding block is arranged in the second sliding groove in a sliding manner; the second sliding block is arranged in the first sliding groove in a sliding manner; the lower ends of the front body and the rear body of the herringbone ladder are provided with bolt lock devices which are in locking connection with the corresponding lower ladder components; and a fixing device is connected between the other sides of the front body and the rear body of the herringbone ladder and the same side of the upper end of the corresponding lower ladder component.
2. The landing extension ladder of claim 1, wherein: the deadbolt assembly includes: the front body or the rear body of the herringbone ladder is provided with an aluminum pipe; two ends of the aluminum pipe are respectively provided with a fixed seat; the fixed seat is fixedly arranged at the lower end of each strut of the front body or the rear body of the herringbone ladder; two ends of the aluminum pipe are positioned above the fixed seat and are fixedly provided with pin shafts; the middle part of the pin shaft is fixed on the aluminum pipe; one end of the pin shaft penetrates through one surface, close to the lower ladder assembly, of the front body or the rear body lower end support of the herringbone ladder and enters the corresponding fixing hole of the lower ladder assembly, and the other end of the pin shaft penetrates through the other surface of the front body or the rear body lower end support of the herringbone ladder; a clamp spring is arranged between the other side of the pin shaft, which is positioned at the lower end of the front body or the rear body of the herringbone ladder, of the strut and the aluminum pipe; and a spring is arranged between the other side of the pin shaft, which is positioned at the lower end of the front body or the rear body of the herringbone ladder, and the clamp spring.
3. The landing extension ladder of claim 2, wherein: and a stop block is arranged on one surface, close to the lower ladder assembly, of the aluminum pipe on the base.
4. A landing extension ladder as claimed in claim 2 or 3, wherein: a plurality of fixing holes are formed in one surface, contacting with the front body or the rear body of the herringbone ladder, of the two supporting columns of the lower ladder assembly.
5. A high security ladder hook as claimed in claim 1, wherein: grooves are formed in the inner sides and the outer sides of the front body strut or the rear body strut of the herringbone ladder on the other side and the corresponding strut of the lower ladder component; the connection fixing device includes: an outer connecting block and an inner connecting block; the outer connecting block is F-shaped; two bulges at one end of the outer connecting block are arranged in the grooves at the outer sides of the front body of the corresponding herringbone ladder, the rear body of the herringbone ladder and the support column at the other side of the corresponding lower ladder assembly, and the other end of the outer connecting block is fixed on the support column of the lower ladder assembly; one end of the inner side connecting block is F-shaped, and the other end of the inner side connecting block is inverted L-shaped; two protrusions at one end of the inner side connecting block in an F shape are arranged in grooves at the inner sides of the front body of the corresponding herringbone ladder, the rear body of the herringbone ladder and the corresponding support column at the other side of the lower ladder assembly, and one end of the inverted L shape is fixed with the support column of the lower ladder assembly.
6. The landing extension ladder of claim 1, wherein: foot vessels are arranged on the outer sides of the lower ends of the two struts of the lower ladder assembly; the foot vessel is in a trapezoid shape; the length of the lower bottom edge of the foot dish is more than or equal to one third of the distance between the two support columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225124.2A CN111720041A (en) | 2019-03-22 | 2019-03-22 | Platform extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225124.2A CN111720041A (en) | 2019-03-22 | 2019-03-22 | Platform extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111720041A true CN111720041A (en) | 2020-09-29 |
Family
ID=72563833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910225124.2A Pending CN111720041A (en) | 2019-03-22 | 2019-03-22 | Platform extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111720041A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024091656A1 (en) * | 2022-10-28 | 2024-05-02 | Werner Co. | Ladder with remote lock actuator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050269159A1 (en) * | 2004-06-07 | 2005-12-08 | Lin Cho S | Telescopic stepladder |
| CN103104186A (en) * | 2013-02-01 | 2013-05-15 | 广西壮族自治区林业科学研究院 | Outdoor operation ladder |
| CN103521807A (en) * | 2013-10-30 | 2014-01-22 | 中建三局装饰有限公司 | Liftable laser positioning high-space suspender perforation mounting device and operation method |
| CN206158563U (en) * | 2016-08-17 | 2017-05-10 | 中天建设集团有限公司天津分公司 | People's cat ladder on telescopic roofing |
| CN107461143A (en) * | 2017-10-13 | 2017-12-12 | 电子科技大学中山学院 | Take telescopic bracket's domestic double ladder |
| CN207377482U (en) * | 2017-08-17 | 2018-05-18 | 郝立勇 | A kind of construction and maintenance close ladder with telescopic |
-
2019
- 2019-03-22 CN CN201910225124.2A patent/CN111720041A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050269159A1 (en) * | 2004-06-07 | 2005-12-08 | Lin Cho S | Telescopic stepladder |
| CN103104186A (en) * | 2013-02-01 | 2013-05-15 | 广西壮族自治区林业科学研究院 | Outdoor operation ladder |
| CN103521807A (en) * | 2013-10-30 | 2014-01-22 | 中建三局装饰有限公司 | Liftable laser positioning high-space suspender perforation mounting device and operation method |
| CN206158563U (en) * | 2016-08-17 | 2017-05-10 | 中天建设集团有限公司天津分公司 | People's cat ladder on telescopic roofing |
| CN207377482U (en) * | 2017-08-17 | 2018-05-18 | 郝立勇 | A kind of construction and maintenance close ladder with telescopic |
| CN107461143A (en) * | 2017-10-13 | 2017-12-12 | 电子科技大学中山学院 | Take telescopic bracket's domestic double ladder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024091656A1 (en) * | 2022-10-28 | 2024-05-02 | Werner Co. | Ladder with remote lock actuator |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200929 |