CN202850839U - Telescopic ladder - Google Patents
Telescopic ladder Download PDFInfo
- Publication number
- CN202850839U CN202850839U CN201220440711.7U CN201220440711U CN202850839U CN 202850839 U CN202850839 U CN 202850839U CN 201220440711 U CN201220440711 U CN 201220440711U CN 202850839 U CN202850839 U CN 202850839U
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- CN
- China
- Prior art keywords
- ladder
- hollow
- pipe
- ladder pipe
- hollow ladder
- 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 - Lifetime
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Abstract
The utility model relates to the field of ladders, and particularly relates to a telescopic ladder. The telescopic ladder comprises a ladder column unit, transversal ladder plates and lock pin mechanisms, wherein the ladder column unit is formed by sleeving a plurality of hollow ladder tubes with different diameters; a connection sleeving element is arranged on each hollow ladder tube; each hollow transversal ladder plate is arranged between the ladder tubes of each group; the transversal ladder plates are connected to the upper ends of the ladder tubes via the connection sleeving elements; each transversal ladder plate is provided with two lock pin mechanisms in a penetrating manner; and the lengths of the hollow ladder tubes gradually increase while the diameters of the hollow ladder tubes gradually decrease. The telescopic ladder disclosed by the utility model solves the problems of poor reliability and bending-pressing resistance of the conventional telescopic ladder with ladder tubes equal in length in the prior art, and is extremely high in practicability.
Description
Technical field
The utility model relates to the ladder field, relates in particular to a kind of extension ladder.
Background technology
At present, in the disclosed extension ladder of prior art, all be to be formed by different tube diameters and isometric hollow ladder pipe socket, but the extension ladder that is comprised of equal length ladder pipe in use, bearing in the situation of identical weight, the pressure that the terraced pipe that caliber is little bears is greater than the pressure that the large ladder pipe of caliber bears, and makes the reliability of extension ladder and bending resistance pressure property not strong, bearing under the larger gravity easily deformation.
Summary of the invention
The utility model provides a kind of extension ladder, the utility model to solve the extension ladder reliability that the terraced length of tube of traditional design equates in the prior art for the prior art deficiency and the not strong problem of property is pressed in bending resistance, has practicality.
For achieving the above object, the utility model can be achieved through the following technical solutions.
A kind of extension ladder, comprise the cleat stanchion unit, horizontal gangboard, latch gear, described cleat stanchion unit is comprised of the hollow ladder pipe socket of several different tube diameters, be provided with the connection external member on every joint hollow ladder pipe, every group of ladder is provided with the horizontal gangboard of hollow between the pipe, and laterally gangboard is connected to the upper end of every group of hollow ladder pipe by connecting external member, and every horizontal gangboard is equipped with two latch gears, the length of every joint hollow ladder pipe increases gradually, and the length of the hollow ladder pipe that caliber is less is longer.
As preferably, the length of every joint hollow ladder pipe increases with arithmetic progression.
As preferably, the length that every joint hollow ladder pipe increases is underrange.
As preferably, described hollow ladder pipe offers and the described locating hole that external member is connected and the connecting hole that is connected with described latch gear of being connected.
As preferably, be provided with reference column on the described connection external member.
As preferably, be arranged in the hollow ladder barrel bolt that the latch gear of horizontal gangboard is connected with described horizontal gangboard and connect
As preferably, one group of hollow ladder pipe is bottom set up a horizontal gangboard.
As preferably, the bottom of one group of hollow ladder pipe bottom is provided with feet, and feet is provided with cushion.
The beneficial effects of the utility model: when using extension ladder, the power that the connecting portion of horizontal gangboard and hollow ladder pipe is subject to is the pressure of user to ladder, the bottom that hollow ladder pipe box is connected to the part ladder pipe in the adjacent ladder pipe can be subject to a downward power, suppose that hollow ladder pipe is lever, the user is the point of application to the pressure of ladder, the bottom that is socketed on the part ladder pipe in the adjacent ladder pipe is fulcrum, force analysis according to lever, when fulcrum from the point of application more close to the time, suffered power is larger, so increase the length of the terraced pipe of every joint, the bottom of the part ladder pipe that is socketed in the adjacent ladder pipe and the distance of the point of application are increased, reduce the suffered pressure in bottom of terraced pipe, make it be not easy to occur deformation, thereby strengthen bending resistance pressure property and the reliability of extension ladder.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is decomposition texture schematic diagram of the present utility model.
1-hollow ladder pipe, 11-locating hole, 12-connecting hole, 2-laterally gangboards
3-connection external member, 31-reference column, 4-latch gear, 5-feet
51-cushion.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
Extremely shown in Figure 2 such as Fig. 1, a kind of extension ladder, comprise the cleat stanchion unit, horizontal gangboard 2, latch gear 4, described cleat stanchion unit is comprised of hollow ladder pipe 1 socket of several different tube diameters, be provided with on every joint hollow ladder pipe 1 and connect external member 3, every group of hollow ladder managed the horizontal gangboard 2 that is provided with hollow between 1, laterally gangboard 2 is connected to the upper end of every group of hollow ladder pipe 1 by connecting external member 3, every horizontal gangboard 2 is equipped with two latch gears 4, and the length of every joint hollow ladder pipe 1 increases gradually, and the length of the hollow ladder pipe 1 that caliber is less is longer.
Present embodiment is by increasing the length of every joint hollow ladder pipe 1, make it increase the length that hollow ladder pipe 1 is socketed on the part ladder pipe in the adjacent ladder pipe, during use, the power that the connecting portion of horizontal gangboard and hollow ladder pipe is subject to is the pressure of user to ladder, the bottom that hollow ladder pipe 1 is socketed on the part ladder pipe in the adjacent ladder pipe can be subject to a downward power, suppose that hollow ladder pipe is lever, the user is the point of application to the pressure of ladder, the bottom that is socketed on the part ladder pipe in the adjacent ladder pipe is fulcrum, force analysis according to lever, when fulcrum from the point of application more close to the time, suffered power is larger, so increase the length of the terraced pipe of every joint, the bottom of the part ladder pipe that is socketed in the adjacent ladder pipe and the distance of the point of application are increased, reduce the suffered pressure in bottom of terraced pipe, make it be not easy to occur deformation, thereby strengthen bending resistance pressure property and the reliability of extension ladder.
In the present embodiment, the length of every joint hollow ladder pipe 1 increases with arithmetic progression, increases progressively best results with arithmetic progression.
In the present embodiment, described hollow ladder pipe 1 offers and the described locating hole 11 that external member 3 is connected and the connecting hole 12 that is connected with described latch gear 4 of being connected.
In the present embodiment, be provided with reference column 31 on the described connection external member 3.
In the present embodiment, be arranged in hollow ladder pipe 1 pin joint that the latch gear 4 of horizontal gangboard is connected with described horizontal gangboard.
In the present embodiment, one group of hollow ladder pipe 1 is bottom set up a horizontal gangboard 2, makes things convenient for the user to climb.
In the present embodiment, the bottom of one group of hollow ladder pipe 1 bottom is provided with feet 5, and feet is provided with cushion 51, the damage that feet and cushion thereof can effectively prevent from skidding and ground is caused.
Above content only is 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 (7)
1. extension ladder, comprise the cleat stanchion unit, horizontal gangboard (2), described cleat stanchion unit is comprised of hollow ladder pipe (1) socket of several different tube diameters, be provided with on every joint hollow ladder pipe (1) and connect external member (3), be provided with the horizontal gangboard (2) of hollow between every group of hollow ladder pipe (1), laterally gangboard (2) is connected to the upper end of every group of hollow ladder pipe (1) by connecting external member (3), every horizontal gangboard (2) is equipped with latch gear (4), it is characterized in that: the length of every joint hollow ladder pipe (1) increases gradually, and the length of the hollow ladder pipe (1) that caliber is less is longer.
2. a kind of extension ladder according to claim 1 is characterized in that: the length of every joint hollow ladder pipe (1) increases with arithmetic progression.
3. a kind of extension ladder according to claim 1 is characterized in that: described hollow ladder pipe (1) offers and the described locating hole (11) that external member (3) is connected and the connecting hole (12) that is connected with described latch gear (4) of being connected.
4. a kind of extension ladder according to claim 3 is characterized in that: be provided with reference column (31) on the described connection external member (3).
5. a kind of extension ladder according to claim 3 is characterized in that: be arranged in hollow ladder pipe (1) pin joint that the latch gear (4) of horizontal gangboard is connected with described horizontal gangboard.
6. a kind of extension ladder according to claim 1 is characterized in that: one group of hollow ladder pipe (1) is bottom set up a horizontal gangboard (2).
7. a kind of extension ladder according to claim 1 is characterized in that: the bottom of one group of hollow ladder pipe (1) bottom is provided with feet (5), and feet is provided with cushion (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220440711.7U CN202850839U (en) | 2012-08-31 | 2012-08-31 | Telescopic ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220440711.7U CN202850839U (en) | 2012-08-31 | 2012-08-31 | Telescopic ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202850839U true CN202850839U (en) | 2013-04-03 |
Family
ID=47982050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220440711.7U Expired - Lifetime CN202850839U (en) | 2012-08-31 | 2012-08-31 | Telescopic ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202850839U (en) |
-
2012
- 2012-08-31 CN CN201220440711.7U patent/CN202850839U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |