CN204782698U - Extension ladder's ladder pipe modular construction and extension ladder - Google Patents
Extension ladder's ladder pipe modular construction and extension ladder Download PDFInfo
- Publication number
- CN204782698U CN204782698U CN201520313873.8U CN201520313873U CN204782698U CN 204782698 U CN204782698 U CN 204782698U CN 201520313873 U CN201520313873 U CN 201520313873U CN 204782698 U CN204782698 U CN 204782698U
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- China
- Prior art keywords
- ladder
- pipe
- boss
- terraced
- air vent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an extension ladder technical field especially relates to extension ladder's ladder pipe modular construction and extension ladder, and the ladder pipe modular construction of the pipe that stretches out and draws back includes that first ladder is managed and second ladder pipe, first ladder pipe and second ladder pipe are cavity ladder pipe, it is intraductal that first ladder is located to second ladder pipe box, the bottom of second ladder pipe is provided with the closing cap that is used for sealing second ladder pipe bottom openings department, first air vent has been seted up to the closing cap, the inside of first ladder pipe is provided with lining supporting sleeve spare, lining supporting sleeve spare cup joints with the closing cap, the second air vent has been seted up to lining supporting sleeve spare, extension ladder is cup jointed by a plurality of groups ladder pipe unit and constitutes, the utility model discloses ladder pipe modular construction simple structure, extension ladder safety and laborsaving.
Description
Technical field
The utility model relates to extension ladder technical field, particularly relates to terraced pipe unit structure and the extension ladder of extension ladder.
Background technology
Extension ladder is the common tool in daily life, and it can pull open elongation in use, and the used time can not drawn in and be deposited.
When existing extension ladder stretches, user needs to cost a lot of money force gas could by the expansion of some joint hollow ladder pipes, and during extension ladder decline contraction, because the speed relying on deadweight decline to be drawn in is very fast, if user's both hands help position improper, easily there is the security incident that extension ladder crosspiece crushes or injures user's finger by a crashing object; Therefore, there are effort when stretching, decline easily injure the potential safety hazard of user's finger by a crashing object problems and shortcomings when shrinking in prior art structure of telescopic ladder.
Summary of the invention
The purpose of this utility model is the terraced pipe unit structure and the extension ladder that provide extension ladder for the deficiencies in the prior art, and the utility model ladder pipe unit structure structure is simple, and extension ladder is safe and laborsaving.
The utility model is achieved through the following technical solutions, the terraced pipe unit structure of telescoping tube, comprise the first ladder pipe and the second ladder pipe, described first ladder pipe and the second terraced pipe are hollow ladder pipe, described second terraced pipe box is located in the first terraced pipe, the bottom of described second terraced pipe is provided with the capping for closing the second terraced pipe bottom end opening place, described capping offers the first air vent, the inside of described first terraced pipe is provided with sets off external member, describedly set off external member and capping is socketed, the described external member that sets off offers the second air vent, when extension ladder stretches, first air vent is communicated with the second air vent.
As preferably, the described external member that sets off comprises the first boss and connecting portion, the top of described first boss arranges reference column, described reference column is provided with screw, screw is provided with in described screw, described capping is provided with the second boss, and described first boss is sheathed on the inside of the second boss, and described second boss offers the through hole passed for reference column.
As preferably, described screw comprises the bar portion be arranged in screw and the head be arranged at outside screw, and the diameter of described head is greater than the aperture of through hole.
As preferably, described first boss and connecting portion one-body molded.
As preferably, described first boss and reference column one-body molded.
As preferably, the both sides of described connecting portion are provided with abutting part, and described abutting part abuts with the inwall of the first terraced pipe.
As preferably, described connecting portion is also provided with the first bend and the second bend, and described first bend and described second bend lay respectively at the both sides of the first boss.
Extension ladder, is socketed successively by the terraced pipe unit described at least two group claims 1 to claim 7 any one and forms.
The utility model beneficial effect: because the bottom of the second terraced pipe is provided with capping, when extension ladder shrinks, second terraced pipe is subject to the air resistance of the first terraced pipe, first air vent of capping staggers with the second air vent setting off external member, first air vent and the second air vent do not have airflow, air pressure in air pressure in second terraced pipe pipe and the first terraced pipe pipe is inconsistent, form the space of relative closure, second terraced pipe decline process need compressed air, and then the second ladder pipe is declined slowly, avoid ladder pipe to pack up the hand injuring operator by a crashing object fast; When extension ladder is in extended state, first air vent of capping is communicated with the second air vent setting off external member, first air vent and the second air vent generation airflow, thus air pressure in the second terraced pipe pipe is consistent with the air pressure in the first terraced pipe pipe, the pulling action of extension ladder is more laborsaving, the utility model ladder pipe unit structure structure is simple, and extension ladder is safe and laborsaving.
Accompanying drawing explanation
Cross-sectional view when Fig. 1 is the stretching of the utility model extension ladder.
Fig. 2 is the cross-sectional view that the utility model extension ladder declines when shrinking.
Fig. 3 is the structural representation that the utility model sets off external member.
Fig. 4 is the structural representation of the utility model capping.
Reference numeral is:
1-the first terraced pipe 2-the second ladder pipe
3-capping 31-the first air vent
32-the second boss 321-through hole
4-set off external member 41-the second air vent
42-the first boss 43-connecting portion
431-abutting part 432-the first bend
433-the second bend 44-reference column
441-screw, 5-screw.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 to Fig. 4, and detailed description of the invention is described further the utility model.
As shown in Figures 1 to 4, the terraced pipe unit structure of telescoping tube, comprise the first terraced pipe 1 and the second terraced pipe 2, described first terraced pipe 1 and the second terraced pipe 2 are hollow ladder pipe, described second terraced pipe 2 is sheathed in the first terraced pipe 1, the bottom of described second terraced pipe 2 is provided with the capping 3 for closing the second terraced pipe 2 bottom end opening place, described capping 3 offers the first air vent 31, the inside of described first terraced pipe 1 is provided with sets off external member 4, the described external member 4 of setting off is socketed with capping 3, described in set off external member 4 and offer the second air vent 41.
The bottom of the terraced pipe 2 of the present embodiment second is provided with capping 3, when extension ladder shrinks, second terraced pipe 2 is subject to the air resistance of the first terraced pipe 1, first air vent 31 of capping 3 staggers with the second air vent 41 setting off external member 4, first air vent 31 and the second air vent 41 do not have airflow, air pressure in air pressure in second terraced pipe 2 pipe and the first terraced pipe 1 pipe is inconsistent, form the space of relative closure, second terraced pipe 2 declines process need compressed air, and then the second terraced pipe 2 is declined slowly, avoid ladder pipe to pack up the hand injuring operator by a crashing object fast; When extension ladder is in extended state, first air vent 31 of capping 3 is communicated with the second air vent 41 setting off external member 4, there is airflow in the first air vent 31 and the second air vent 41, thus air pressure in the second terraced pipe 2 pipe is consistent with the air pressure in the first terraced pipe 1 pipe, the pulling action of extension ladder is more laborsaving.
In the present embodiment, the described external member 4 that sets off comprises the first boss 42 and connecting portion 43, the top of described first boss 42 arranges reference column 44, described reference column 44 is provided with screw 441, screw 5 is provided with in described screw 441, described capping 3 is provided with the second boss 32, described first boss 42 is sheathed on the inside of the second boss 32, described second boss 32 offers the through hole 321 passed for reference column 44, described screw 5 comprises the bar portion be arranged in screw 441 and the head be arranged at outside screw 441, the diameter of described head is greater than the aperture of through hole 321, described in the present embodiment, the first boss 42 is sheathed on the inside of the second boss 32, reference column 44 is through after through hole 321, screwing 5 is added again in screw 441, the diameter of the head of screw 5 is greater than the aperture of through hole 321, prevent from setting off external member 4 and capping 3 departs from, when extension ladder is in extended state, capping 3 moves up along reference column 44, when extension ladder shrinks, capping 3 moves down along reference column 44.
As the present embodiment preferred forms, described first boss 42 and connecting portion 43 one-body molded; Described first boss 42 and reference column 44 one-body molded, the fixed work order between brief first boss 42 and connecting portion 43, between the first boss 42 and reference column 44.
In the present embodiment, the both sides of described connecting portion 43 are provided with abutting part 431, described abutting part 431 abuts with the inwall of the first terraced pipe 1, in addition, described connecting portion 43 is also provided with the first bend 432 and the second bend 433, described first bend 432 and described second bend 433 lay respectively at the both sides of the first boss 42, set off external member 4 and are fixed in the first terraced pipe 1.
Extension ladder of the present utility model, is socketed by some groups of above-mentioned terraced pipe units and forms.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (8)
1. the terraced pipe unit structure of telescoping tube, comprise the first ladder pipe (1) and the second ladder pipe (2), described first ladder pipe (1) and the second ladder pipe (2) are hollow ladder pipe, described second ladder pipe (2) is sheathed in the first ladder pipe (1), it is characterized in that: the bottom of described second ladder pipe (2) is provided with the capping (3) for closing second ladder pipe (2) bottom end opening place, described capping (3) offers the first air vent (31), the inside of described first ladder pipe (1) is provided with sets off external member (4), the described external member (4) that sets off is socketed with capping (3), the described external member (4) that sets off offers the second air vent (41), when extension ladder stretches, the first air vent (31) is communicated with the second air vent (41).
2. the terraced pipe unit structure of telescoping tube according to claim 1, it is characterized in that: described in set off external member (4) and comprise the first boss (42) and connecting portion (43), the top of described first boss (42) arranges reference column (44), described reference column (44) is provided with screw (441), screw (5) is provided with in described screw (441), described capping (3) is provided with the second boss (32), described first boss (42) is sheathed on the inside of the second boss (32), described second boss (32) offers the through hole (321) passed for reference column (44).
3. the terraced pipe unit structure of telescoping tube according to claim 2, it is characterized in that: described screw (5) comprises the bar portion be arranged in screw (441) and the head being arranged at screw (441) outside, and the diameter of described head is greater than the aperture of through hole (321).
4. the terraced pipe unit structure of telescoping tube according to claim 2, is characterized in that: described first boss (42) and connecting portion (43) one-body molded.
5. the terraced pipe unit structure of telescoping tube according to claim 2, is characterized in that: described first boss (42) and reference column (44) one-body molded.
6. the terraced pipe unit structure of telescoping tube according to claim 2, is characterized in that: the both sides of described connecting portion (43) are provided with abutting part (431), and the inwall that described abutting part (431) manages (1) with the first ladder abuts.
7. the terraced pipe unit structure of telescoping tube according to claim 2, it is characterized in that: described connecting portion (43) is also provided with the first bend (432) and the second bend (433), described first bend (432) and described second bend (433) lay respectively at the both sides of the first boss (42).
8. extension ladder, is characterized in that: be socketed successively by the terraced pipe unit described at least two group claims 1 to claim 7 any one and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520313873.8U CN204782698U (en) | 2015-05-15 | 2015-05-15 | Extension ladder's ladder pipe modular construction and extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520313873.8U CN204782698U (en) | 2015-05-15 | 2015-05-15 | Extension ladder's ladder pipe modular construction and extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204782698U true CN204782698U (en) | 2015-11-18 |
Family
ID=54522767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520313873.8U Expired - Fee Related CN204782698U (en) | 2015-05-15 | 2015-05-15 | Extension ladder's ladder pipe modular construction and extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204782698U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017197654A1 (en) * | 2016-05-20 | 2017-11-23 | 东莞鼎翰铝制品有限公司 | Extension ladder with buffer function |
| CN107461142A (en) * | 2017-07-27 | 2017-12-12 | 潘跃进 | The slow descending mechanism of the automatic adaptation pipe deformation of extension ladder |
-
2015
- 2015-05-15 CN CN201520313873.8U patent/CN204782698U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017197654A1 (en) * | 2016-05-20 | 2017-11-23 | 东莞鼎翰铝制品有限公司 | Extension ladder with buffer function |
| CN107461142A (en) * | 2017-07-27 | 2017-12-12 | 潘跃进 | The slow descending mechanism of the automatic adaptation pipe deformation of extension ladder |
| WO2019019228A1 (en) * | 2017-07-27 | 2019-01-31 | 潘跃进 | Slowing mechanism automatically fitting shape change of tube for telescopic ladder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20170515 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |