CN211737014U

CN211737014U - Extension ladder

Info

Publication number: CN211737014U
Application number: CN201922490763.XU
Authority: CN
Inventors: 杨仲泽
Original assignee: Fujian Hongguan Communication Engineering Co ltd
Current assignee: Fujian Hongguan Communication Engineering Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-23
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an extension ladder, which comprises a ladder main body, wherein the ladder main body comprises two groups of supporting cylinders and a pedal arranged between the two groups of supporting cylinders, the supporting cylinders comprise a plurality of sections of supporting cylinder units which are telescopically arranged, a telescopic rod is arranged in the supporting cylinder units, the telescopic rod comprises a plurality of sections of rod bodies, each supporting cylinder unit corresponds to one section of rod body, a tail rod is rotatably arranged in a mounting hole, an adjusting gear is sleeved outside the tail rod, a long strip-shaped hole is arranged on the tail rod unit, part of gear teeth of the adjusting gear are arranged in the hole, an upper through hole is arranged on the upper end surface of a head unit, a head rod is movably arranged in the upper through hole in an up-and-down way, and a hook is arranged on the upper end of the head rod. Thereby adjusting the position of the hook as required.

Description

Extension ladder

Technical Field

The utility model relates to an overhaul tool technical field, especially relate to an extension ladder.

Background

The bamboo joint extension ladder can be stretched and shortened like a fishing rod, the length after being shortened is about 0.7 meter, the height after being stretched can reach about 4 meters, the bamboo joint extension ladder has the advantages of light weight, small size and convenience in carrying, the extension ladder can be widely applied to various occasions, particularly the fields of power line repair, telecommunication maintenance and the like, the existing bamboo joint ladder is the same as a common single-layer ladder, people need to hold the ladder to prevent the ladder from sliding down to cause personnel damage when an auxiliary fixing structure is absent in use, the hooks such as hooks are additionally arranged at the top of the extension ladder by people, the hooks are generally fixedly arranged at the top of the extension ladder, and when the hooks are fixedly arranged, the positions of the hooks are limited and cannot be adjusted as required.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a can adjust the extension ladder of couple as required.

In order to achieve the above purpose, the solution of the present invention is:

the utility model provides a telescopic ladder, includes the ladder main part, the ladder main part includes that two sets of support section of thick bamboo and setting are two sets of footboard between the support section of thick bamboo is established the ladder main part is vertical places, and is two sets of support section of thick bamboo is by lower to upper slope setting in opposite directions, support section of thick bamboo includes the support section of thick bamboo unit that the multisection connects gradually, adjacent two sections support section of thick bamboo unit that is located the top in the support section of thick bamboo unit with the activity shrink to the mode setting in the support section of thick bamboo unit that is connected with this support section of thick bamboo unit lower extreme, establish and be located every group support section of thick bamboo the top support section of thick bamboo unit is first unit, establishes and is located every group support section of thick bamboo bottom support section: the supporting cylinder units are cylindrical, telescopic rods are arranged in the supporting cylinder units, each telescopic rod comprises a plurality of sections of rod bodies, the upper rod body in two adjacent sections of rod bodies is movably contracted into the rod body connected with the lower end of the rod body, each supporting cylinder unit corresponds to one section of rod body, the rod body corresponding to the head unit is a head rod, and the rod body corresponding to the tail unit is a tail rod;

the tail unit is provided with a mounting base which is provided with an inner cavity and a mounting hole communicated with the inner cavity, the mounting hole is arranged upwards, a tail end limiting block is fixed on the lower end of the tail rod, the tail end limiting block is positioned in the inner cavity and is clamped with the upper side wall of the inner cavity, the tail rod is rotatably arranged in the mounting hole in a penetrating way, the tail rod is sleeved with the adjusting gear, the tail unit is provided with a long-strip-shaped opening, part of gear teeth of the adjusting gear penetrate through the open hole, an upper through hole is arranged on the upper end surface of the head unit, the head rod is movably arranged in the upper through hole in a penetrating way up and down, the upper end of the head rod is provided with a hook, the width of the hook is larger than the aperture of the upper through hole, each rod body is provided with a limit groove, the limiting grooves are arranged along the length direction of each section of the rod body, and the limiting grooves on the adjacent two sections of the rod body are matched with each other.

Furthermore, a clamping block matched with the upper side wall of the head unit in a clamping mode is arranged on the head rod.

Furthermore, the fixture block is in a square shape.

Furthermore, a bearing is further arranged on the upper through hole, and the head rod is rotatably arranged in a shaft hole of the bearing in a penetrating mode.

After the structure is adopted, the utility model relates to an extension ladder has following beneficial effect: be provided with the telescopic link in the support cylinder unit, the telescopic link has including the multisection body of rod, the body of rod that is located the top in the two adjacent sections bodies of rod is with the mode setting of activity shrink to the pole that is connected with this body of rod lower extreme, every support cylinder unit all corresponds with a section of rod, the tailboom rotates and wears to locate in the mounting hole, the tailboom overcoat is equipped with adjusting gear, be provided with long banding trompil on the tailboom, adjusting gear's partial teeth of a cogwheel are worn to locate the trompil, the through-hole has been seted up to the up end of first unit, the through-hole is worn to locate in the activity about the first pole, the upper end of first pole is provided with the couple, during the use, the teeth of a cogwheel rotation regulation telescopic link that adjusting gear was stirred to the accessible, make the first pole rotate and drive the telescopic.

Drawings

Fig. 1 is a schematic structural view of an extension ladder of the present invention;

FIG. 2 is a schematic view of the structure of the telescopic rod and the hook of the present invention;

FIG. 3 is a schematic cross-sectional view of the tail rod and the mounting base of the connecting rod of the present invention;

in the figure: the supporting device comprises a supporting cylinder 1, a pedal 2, a supporting cylinder unit 3, a head unit 4, a tail unit 5, a telescopic rod 6, a limiting groove 7, a head rod 8, a tail rod 9, an installation base 10, a tail end limiting block 11, an opening 12, an adjusting gear 13, a hook 14, a clamping block 15 and a bearing 16.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

The extension ladder shown in fig. 1-3 comprises a ladder main body, wherein the ladder main body comprises two groups of support cylinders 1 and pedals 2 arranged between the two groups of support cylinders, the ladder main body is arranged vertically, the two groups of support cylinders 1 are arranged in an inclined manner from bottom to top, each support cylinder 1 comprises a plurality of sections of support cylinder units 3 which are sequentially connected, each support cylinder unit 3 is in a cylindrical shape, the support cylinder units 3 located above the adjacent two sections of support cylinder units 3 are movably contracted into the support cylinder units 3 connected with the lower ends of the support cylinder units 3, and the extension structures and the contraction modes between the support cylinder units 3 are the prior art and are not repeated herein.

Establish to be located every group a supporting cylinder unit 3 of supporting cylinder the top is first unit 4, establishes to be located every group a supporting cylinder unit 3 of supporting cylinder the bottom is tail unit 5, is provided with telescopic link 6 in the supporting cylinder unit 3, and telescopic link 6 has including the multisection body of rod, the body of rod can be for the hollow round bar similar with the rib of folding umbrella, also can be the inside combination pole that is provided with the holding chamber, and above-mentioned combination pole includes pole body and stopper, and above-mentioned stopper can be dismantled and set up in the one end of pole body, and the perforation that supplies other combination poles to pass is seted up to the other end of pole body, the last chamber wall joint in above-mentioned stopper and the holding. The pipe diameter size of multisection the body of rod increases by last lower in proper order, adjacent two in the body of rod be located the top the body of rod with the activity shrink to with this the body of rod lower extreme is connected the mode setting in the body of rod, every section all be provided with spacing groove 7 on the body of rod, spacing groove 7 all follows each section the length direction of the body of rod sets up, adjacent two the spacing groove 7 on the body of rod is mutually supported, specific spacing groove 7 is sunken setting up half slot on the body of rod, spacing groove 7 corresponds the inboard of the body of rod is formed with the convex part, the convex part inlay card of the body of rod that is located the top is connected at this body of rod lower extreme in the spacing groove 7 of the body of rod, spacing groove 7 is used for limiting adjacent two sections the rotation between the body of rod.

Every supporting cylinder unit 3 all with a lesson the body of rod is corresponding, establishes with head unit 4 corresponding the body of rod is head pole 8, establishes with tail unit 5 corresponding the body of rod is tail pole 9, and the trompil that supplies telescopic link 6 to pass is all seted up at every supporting cylinder unit 3's except tail unit 5 upper and lower both ends.

Be provided with installation base 10 on tail unit 5, installation base 10 have the inner chamber and with the mounting hole that the inner chamber switched on mutually, the mounting hole sets up, and the stopper of fixing on the lower extreme of tail rod 9 is terminal stopper 11, and terminal stopper 11 is located the inner chamber and with the last side wall joint of inner chamber, the partial body of rod of tail rod 9 rotate and wear to locate in the mounting hole, tail rod 9 external fixation is equipped with adjusting gear 13, is provided with rectangular form trompil 12 on tail unit 5, and adjusting gear 13's partial teeth of a cogwheel are worn to locate trompil 12 and are exposed outside tail unit 5, and the trompil 12 of establishing on the up end of head unit 4 is last through-hole, and head rod 8 is passed through about the activity and is located go up the through-hole, and head rod 8's upper end is provided with couple 14, and couple 14's.

Preferably, the outer side wall of the head rod 8 is fixedly provided with a clamping block 15 which is in clamping fit with the upper side wall of the head unit 4 in a sticking or welding manner, and the clamping block 15 is square block-shaped.

Go up still to inlay on the through-hole and be equipped with bearing 16, in the shaft hole that the head rod 8 rotated and worn to locate bearing 16, bearing 16 was used for assisting telescopic link 6 to rotate.

The above embodiments and drawings do not limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be considered as departing from the scope of the present invention.

Claims

1. The utility model provides a telescopic ladder, includes the ladder main part, the ladder main part includes that two sets of support section of thick bamboo and setting are two sets of footboard between the support section of thick bamboo, the ladder main part is vertical places, and is two sets of support section of thick bamboo is by lower to upper slope setting in opposite directions, support section of thick bamboo includes the support section of thick bamboo unit that the multisection connects gradually, adjacent two sections the support section of thick bamboo unit that is located the top in the support section of thick bamboo unit is with the activity shrink to the mode setting in the support section of thick bamboo unit that is connected with this support section of thick bamboo unit lower extreme, is located every group support section of thick bamboo the top support section of thick bamboo unit is first unit, is located every group support section of thick bamboo lower extreme support: the supporting cylinder units are cylindrical, telescopic rods are arranged in the supporting cylinder units, each telescopic rod comprises a plurality of sections of rod bodies, the rod body above two adjacent sections of rod bodies is movably contracted into the rod body connected with the lower end of the rod body, each supporting cylinder unit corresponds to one section of rod body, the rod body corresponding to the head unit is a head rod, and the rod body corresponding to the tail unit is a tail rod;

2. An extension ladder as claimed in claim 1, characterized in that: the head rod is provided with a clamping block which is in clamping fit with the upper side wall of the head unit.

3. An extension ladder as claimed in claim 2, characterized in that: the clamping block is in a square shape.

4. An extension ladder as claimed in claim 1, characterized in that: the upper through hole is further provided with a bearing, and the head rod is rotatably arranged in the shaft hole of the bearing in a penetrating mode.