CN220909575U

CN220909575U - Safe folding ladder

Info

Publication number: CN220909575U
Application number: CN202322450260.6U
Authority: CN
Inventors: 肖鑫; 望开新; 彭波; 张梁军
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-05-07
Anticipated expiration: 2033-09-11

Abstract

The utility model discloses a safe folding ladder, wherein a first pinch roller is arranged at the upper end of a left ladder frame, a second pinch roller is arranged at the upper end of a right ladder frame, a screw rod is arranged at the center of the right end of the first pinch roller, a first annular groove is formed at the right end of the first pinch roller, a first tooth is further arranged on the outer ring of the right end of the first pinch roller, a through hole corresponding to the screw rod is formed at the center of the left end of the second pinch roller, a second annular groove and a second tooth corresponding to the first pinch roller are further formed at the left end of the second pinch roller, a first spring is fixedly arranged between the annular grooves of the first pinch roller and the second pinch roller, a nut is meshed after the first pinch roller passes through the through hole of the second pinch roller through the screw rod, and a rack is fixedly arranged on the side wall of the left ladder frame, and the safe folding ladder has the advantages that: can prevent the left ladder frame and the right ladder frame from suddenly opening, and ensures the safety of the folding ladder.

Description

Safe folding ladder

Technical Field

The utility model relates to the technical field of electric power universal tools, in particular to the technical field of safe folding ladders.

Background

When electric power personnel carry out electrician's operation or other operation of stepping up, generally still need the ladder to assist to look over the maintenance to the equipment of eminence except the toolbox, traditional ladder structure is comparatively simple, and the easy roll-off between two ladder frames of folding ladder in the use often needs other personnel to carry out hand fixation.

In some cases, such as meter reading work and the like, one person needs to independently finish the meter reading work, the ground surface conditions of the use places are different, particularly, the wet and slippery ground can bring great difficulty to the use of the ladder, the corresponding limiting structure does not control the opening angle between the two ladder frames or keep the opening angle stable, safety accidents are easy to occur, the falling injury of the staff is often caused, and the working efficiency of the operators is reduced.

Disclosure of utility model

The utility model provides a safe folding ladder for solving the technical problems. The device can be conveniently and safely used in any ground environment, is firm in locking, can greatly improve the safety of high-climbing operation, and is beneficial to improving the working efficiency of operators.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The safe folding ladder comprises a left ladder frame, a right ladder frame, a locking block, a pawl, a pressing block and a pull rod, wherein a first pressing wheel is arranged at the upper end of the left ladder frame, a second pressing wheel is arranged at the upper end of the right ladder frame, a screw rod is arranged at the center of the right end of the first pressing wheel, a first annular groove is formed in the right end of the first pressing wheel, a first tooth is further arranged on the outer ring of the right end of the first pressing wheel, a through hole corresponding to the screw rod is formed in the center of the left end of the second pressing wheel, a second annular groove and a second tooth corresponding to the first pressing wheel are further arranged at the left end of the second pressing wheel, a first spring is fixedly arranged between the first pressing wheel and the first annular groove of the second pressing wheel, a nut is meshed after the first pressing wheel passes through the through hole of the second pressing wheel through the screw rod, the first tooth of the first pressing wheel corresponds to the second tooth of the second pressing wheel, a pair of through grooves are respectively formed in the upper portion of the side wall of the left ladder frame, a hollow shell-shaped locking block is opened in an upper portion, a lower portion of the locking block is opened, a through hole corresponding to the screw rod is formed in the left end of the second pressing wheel, a second annular groove corresponding to the through hole corresponding to the screw rod is formed in the left end of the second pressing wheel, a rotary groove is also formed in the side wall of the side wall, a rotary shaft is correspondingly arranged between the two pressing blocks is movably arranged at the rotary groove is correspondingly, a rotary groove is respectively arranged at the upper portion of the side groove is correspondingly, and a rotary groove is respectively, and a lug is correspondingly arranged at the end groove is correspondingly through a lug is respectively, and a lug is correspondingly arranged at a lug is respectively, and a lug is respectively. The lower end of the pressing block is fixedly provided with a pressing rod, the pressing rod penetrates through the guide cylinder, the lower end of the pressing rod is in contact with the pawl, a second spring is fixedly arranged between the spring seat and the pressing block, one end of the pulling rod is hinged to the lower bottom plate of the locking block, and the other end of the pulling rod is hinged to the side wall of the right ladder frame.

Preferably, the first pressing wheel and the second pressing wheel are symmetrically arranged on the left ladder frame and the right ladder frame.

Preferably, the pawls are provided in pairs in the lock block.

The beneficial effects achieved by adopting the technical proposal of the utility model are as follows:

1. Through screw rod and first tooth that set up on first pinch roller, set up corresponding through-hole, second tooth and first spring on the second pinch roller terminal surface, when needs use, open a suitable angle to the ladder, screw the nut of meshing on the screw rod, the spring compression this moment, the mutual tight meshing between the first tooth of first pinch roller and the second tooth on the second pinch roller terminal surface can realize preventing first heavy left ladder frame and right ladder frame suddenly and open like this, guaranteed folding ladder's security.

2. Through set up rack, locking piece and pawl mechanism on left ladder frame, be provided with the reset torsion spring in the pivot, can realize that the locking piece is automatic locking when upwards moving, must press the pawl to withdraw from the rack and just can the controlled upward movement, for the second again prevent left ladder frame and right ladder frame to open suddenly like this and provide the premise, when needs locking piece gliding, can directly fold the ladder frame, not influenced by the pawl.

3. The left ladder frame and the right ladder frame are hinged through the pull rod to form a triangle, so that the safe folding ladder is safer, the second protection against sudden opening of the left ladder frame and the right ladder frame can be realized, and the safety of the folding ladder is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a first puck and nut configuration in accordance with the present utility model;

FIG. 3 is a schematic diagram of a second puck according to the present utility model;

FIG. 4 is a schematic view of the internal structure of the lock block and the push box according to the present utility model.

1. A left ladder frame; 2. a right ladder frame; 3. a first pinch roller; 4. a second pinch roller; 5. a screw; 6. a first ring groove; 7. a first tooth; 8. a through hole; 9. a nut; 10. a rack; 11. a through groove; 12. a locking piece; 13. an open slot; 14. a pawl; 15. a spring seat; 16. a guide cylinder; 17. pressing the box; 18. a sliding stopping groove; 19. a pressing block; 20. a compression bar; 21. a second spring; 22. a pull rod; 23. a first spring; 25. a rotating shaft; 26. a second ring groove; 27. a second tooth.

Detailed Description

The embodiment is shown by referring to fig. 1-4, the utility model provides a safe folding ladder, which comprises a left ladder frame 1, a right ladder frame 2, a locking block 12, a pawl 14, a pressing block 19 and a pull rod 22, wherein a first pinch roller 3 is arranged at the upper end of the left ladder frame 1, a second pinch roller 4 is arranged at the upper end of the right ladder frame 2, the first pinch roller 3 and the second pinch roller 4 are symmetrically arranged on the left ladder frame 1 and the right ladder frame 2, a screw 5 is arranged at the center of the right end of the first pinch roller 3, a first annular groove 6 is arranged at the right end of the first pinch roller 3, a first tooth 7 is further arranged at the outer ring of the right end of the first pinch roller 3, a through hole 8 corresponding to the screw 5 is arranged at the center of the left end of the second pinch roller 4, a second annular groove 26 and a second tooth 27 corresponding to the first pinch roller 3 are further arranged at the left end of the second pinch roller 4, a first spring 23 is fixedly arranged between the first annular groove of the first pinch roller 3 and the second pinch roller 4, the first pinch roller 3 is meshed with a nut 9 after passing through a through hole 8 of the second pinch roller 4 through a screw rod 5, a first tooth 7 of the first pinch roller 3 corresponds to a second tooth 27 of the second pinch roller 4, when the ladder is required to be used, the ladder is opened by a proper angle, when the meshed nut 9 on the screw rod 5 is screwed, the spring 23 is compressed, the first tooth 7 of the first pinch roller 3 and the second tooth 27 on the end surface of the second pinch roller 4 are meshed with each other, the first prevention of the sudden opening of the left ladder frame and the right ladder frame can be realized, a rack 10 is fixedly arranged on the side wall of the left ladder frame 1, paired through grooves 11 are respectively formed on the upper side wall and the lower side wall of the rack 10, a locking piece 12 is in a hollow shell shape with upper opening and lower opening, an opening groove 13 is formed on the inner side wall of the locking piece 12, the locking piece 12 is movably arranged on the through groove 11 with the opening groove 13, the pawl 14 is movably arranged at the upper ends of two side walls of the lock block 12 through a rotating shaft 25, a reset torsion spring is arranged between the rotating shaft 25 and the pawl 14, the pawl 14 corresponds to teeth on the rack 10, the pawls 14 are arranged in pairs in the lock block, a square hole is formed in a top plate of the lock block 12, the square hole corresponds to a rear arm of the pawl 14, a spring seat 15 and a guide cylinder 16 are fixedly arranged on the top plate of the lock block 12, the guide cylinder 16 is communicated with the square hole, a pressing box 17 is fixedly arranged on the top plate of the lock block 12, two end faces of the pressing box 17 are provided with a stop chute 18, two ends of the pressing block 19 are respectively provided with a bump, the pressing block 19 is movably arranged in the stop chute 18 of the pressing box 17 through the bumps at two ends of the pressing block 19, the stroke of the pressing block 19 is limited through the stop chute 18, a pressing rod 20 is fixedly arranged at the lower end of the pressing block 19, the pressing rod 20 is arranged in the guide cylinder 16 in a penetrating manner, the lower end of the pressing rod 20 is contacted with the pawl 14, the spring seat 15 is fixedly arranged between the pressing block 15 and the pawl 14, the second spring seat 19 is fixedly arranged at the lower end of the pressing block 19, and the second spring seat 19 is separated from the upper end of the second spring seat 14 when the second spring 14 is in the second spring seat 14, and the second spring is released, and the spring is released from the upper end of the second spring 19, and the spring is released from the second spring, and the spring is released. Conversely, when the push block 19 is pushed, the front end of the pawl 14 is withdrawn from the rack 10, and the lock is released. When the locking piece 12 is needed to slide downwards, the ladder frame can be directly folded, the influence of pawls is avoided, the second effect of preventing the left ladder frame and the right ladder frame from being suddenly opened can be achieved, one end of the pull rod 22 is hinged to the lower bottom plate of the locking piece 12, the other end of the pull rod is hinged to the side wall of the right ladder frame 2, a stable triangle is formed, the safe folding ladder is safer, the safe folding ladder can be conveniently and safely used in any ground environment, and the safety of high-speed pedaling operation and the electrician operation efficiency are greatly improved.

Claims

1. A safety folding ladder, characterized in that: including left ladder frame (1), right ladder frame (2), locking piece (12), pawl (14), push block (19) and pull rod (22), left ladder frame (1) upper end is provided with first pinch roller (3), right ladder frame (2) upper end is provided with second pinch roller (4), first pinch roller (3) right-hand member center is provided with screw rod (5), and first annular groove (6) have been seted up to this first pinch roller (3) right-hand member, first pinch roller (3) right-hand member outer lane still is provided with first tooth (7), through-hole (8) corresponding with screw rod (5) have been seted up at second pinch roller (4) left end center, this second pinch roller (4) left end still be provided with first pinch roller (3) corresponding second annular groove (26) and second tooth (27), fixed mounting has first spring (23) between first pinch roller (3) and second pinch roller (4) first annular groove (6), first pinch roller (3) have first tooth (7) through its first pinch roller (4) of crossing behind second pinch roller (4) through-hole (8), first tooth (10) of this second pinch roller (4) are installed, the inner side wall of the rack (10) is provided with a pair of through grooves (11) up and down respectively, the lock block (12) is in a hollow shell shape with an upper opening and a lower opening, the inner side wall of the lock block (12) is provided with an opening groove (13), the lock block (12) is movably arranged on the through groove (11) of the rack (10) through the opening groove (13), the pawl (14) is movably arranged at the upper ends of the two side walls of the lock block (12) through a rotating shaft (25), a reset torsion spring is arranged between the rotating shaft (25) and the pawl (14), the pawl (14) corresponds to teeth on the rack (10), a top plate of the lock block (12) is provided with a square hole corresponding to a rear arm of the pawl (14), a spring seat (15) and a guide cylinder (16) are fixedly arranged on the top plate of the lock block (12), the guide cylinder (16) is communicated with the square hole, a pressing box (17) is fixedly arranged on the top plate of the lock block (12), two end faces of the pressing box (17) are provided with a reset torsion spring, the two end faces of the pressing box (17) are provided with two end faces of the pressing box (19), the pressing box (19) are respectively arranged at the two ends of the pressing box (19) through the two end faces of the pressing box (19) and the pressing box (20), the lower end of the compression bar (20) is contacted with the pawl (14), a second spring (21) is fixedly arranged between the spring seat (15) and the pressing block (19), one end of the pull rod (22) is hinged on the lower bottom plate of the locking block (12), and the other end of the pull rod is hinged on the side wall of the right ladder frame (2).

2. A safety folding ladder according to claim 1, wherein: the first pressing wheel (3) and the second pressing wheel (4) are symmetrically arranged on the left ladder frame (1) and the right ladder frame (2).

3. A safety folding ladder according to claim 1, wherein: the pawls (14) are disposed in pairs within the lock block.