Extension ladder for outdoor installation operation

By designing safety insurance components in the telescopic ladder, using technical means such as torsion return springs and rotating limit rods, the sharp contraction caused by the failure of the existing telescopic ladder limiting device is solved, and the safety of use is significantly improved.

CN222976744UActive Publication Date: 2025-06-13HUBEI TIANCHISHAN ECOLOGICAL AGRI TECH DEV CO LTD
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Patent Information

Application Number
CN202422171227.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-05
Publication Date
2025-06-13
Estimated Expiration
2034-09-05

AI Technical Summary

Technical Problem

The existing telescopic ladder may shrink sharply when the limiting device fails, resulting in safety risks for users.

Method used

A telescopic ladder for outdoor installation operation is designed, using safety insurance components, including torsion return springs, rotating limit rods and thickened heads. Through the synergy of these components, the sliding of the sliding ladder is restricted and the sharp contraction is prevented.

Benefits of technology

It effectively improves the safety of use, prevents the sliding ladder from falling sharply in the event of failure, and ensures the safety of users.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of extension ladders, in particular to an extension ladder for outdoor installation operation, which comprises a supporting ladder and a sliding ladder, a plurality of foot rest levers are fixedly arranged at the middle positions of the supporting ladder and the sliding ladder at equal intervals, and a safety insurance component is fixedly arranged at the side edge of the sliding ladder; the safety insurance assembly comprises an installation plate, the side edge of the installation plate is fixedly connected with a side supporting plate, a supporting piece is fixedly installed on the front side of the side supporting plate, a thickened head is fixedly arranged at the end of the supporting piece, a rotating groove is formed in the inner side of the thickened head, a rotating limiting rod is rotationally arranged on the inner side of the rotating groove, and a rotating shaft is fixedly installed at the rear end of the rotating limiting rod. According to the sliding ladder, through the arrangement of the safety insurance assembly, when the supporting ladder slides upwards for production, the safety insurance assembly cannot block and limit the position and cannot interfere with normal use, when the sliding ladder slides downwards, the safety insurance assembly can play a role in emergency clamping, the sliding ladder is prevented from falling sharply, and the use safety is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of telescopic ladders, in particular to a telescopic ladder for outdoor installation work. Background Art

[0002] A telescopic ladder is a retractable and convenient ladder, which is widely used for indoor and outdoor climbing work, especially in environments with space limitations.

[0003] The telescopic ladders in the prior art have a matching limit device during telescopic positioning to limit the telescopic freedom of the telescopic ladder, and then it can be used for climbing. However, when the limit device fails, the upper side of the telescopic ladder will shrink sharply under the load-bearing state, which will cause personal injury to the user, and the safety guarantee is lacking. For this reason, we propose a telescopic ladder for outdoor installation work to solve the above deficiencies. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the shortcomings in the prior art, and propose a telescopic ladder for outdoor installation work.

[0005] By adopting the above technical solutions,

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A telescopic ladder for outdoor installation work, including a support ladder and a sliding ladder. A number of footrest rods are fixedly installed at equal intervals in the middle positions of the support ladder and the sliding ladder. A safety insurance component is fixedly installed on the side of the sliding ladder; the safety insurance component includes a mounting plate, a side support plate is fixedly connected to the side of the mounting plate, a support member is fixedly installed on the front side of the side support plate, a thickened head is fixedly arranged at the end of the support member, a rotating groove is opened inside the thickened head, a rotating limit rod is rotatably arranged inside the rotating groove, a rotating shaft is fixedly installed at the rear end of the rotating limit rod, the rotating shaft rotates through to the outside of the thickened head, and a torsion return spring is fixedly connected between the rotating shaft and the thickened head. A sliding cylinder is fixedly installed on the support member, a sliding rod is slidably installed inside the sliding cylinder, and a steel wire rope is fixedly connected between the sliding rod and the rotating limit rod.

[0008] Preferably, a foot sleeve is sleeved at the bottom of the support ladder, and anti-slip grooves are opened on the foot sleeve.

[0009] By adopting the above technical solutions, a foot sleeve with anti-slip grooves is arranged at the bottom of the support ladder, which increases the anti-slip ability of the bottom of the support ladder and improves the use safety.

[0010] Preferably, a sliding strip is fixedly installed on the rear side of the support ladder, and a card slot is opened on the front side of the sliding ladder. The sliding strip is slidably clamped inside the card slot.

[0011] Preferably, a limiting screw rod is screwed and installed on the side of the sliding ladder, and the inner end of the limiting screw rod is screwed through to the inner side of the card slot.

[0012] By adopting the above technical solution, when the inner end of the limiting screw rod abuts against the sliding strip at the rear side of the supporting ladder when the limiting screw rod rotates, the sliding freedom between the sliding strip and the card slot will be restricted, and then the sliding ladder will be fixedly limited on the supporting ladder.

[0013] Preferably, an adjustment knob is fixedly installed at the outer end of the limiting screw rod.

[0014] Preferably, the mounting plate is screwed and installed on the sliding ladder by screws.

[0015] By adopting the above technical solution, the mounting plate and the safety insurance component on the mounting plate can be detached from the sliding ladder.

[0016] Preferably, a sealing cover is installed on the side of the thickened head, and the torsion return spring is located inside the sealing cover.

[0017] Preferably, a backing plate is installed at the bottom of the rotating limiting rod, and the backing plate is a rubber pad.

[0018] By adopting the above technical solution, the setting of the backing plate avoids the wear and impact damage of rigid contact when the rotating limiting rod abuts against the footrest rod in the middle of the supporting ladder.

[0019] Preferably, vertical sliding grooves and horizontal sliding grooves are formed on the upper side wall of the sliding cylinder, and a convex square block is fixedly connected to the side wall of the sliding rod, and the cross-sectional size of the convex square block is adapted to the vertical sliding grooves and the horizontal sliding grooves.

[0020] Preferably, an operation handle is fixedly installed at the upper end of the sliding rod.

[0021] By adopting the above technical solution, the setting of the installation handle facilitates manually pulling the sliding rod through the operation handle.

[0022] Compared with the related technology, a telescopic ladder for outdoor installation work proposed by the present utility model has the following beneficial effects:

[0023] In the present utility model, for the telescopic ladder for outdoor installation work, through the provided safety insurance component, the torsional reset function of the torsion reset spring is utilized in the safety insurance component to drive the rotating limit rod to expand outward from the support member. When the rotating limit rod expands outward, its outer end protrudes from the footrest rod of the support ladder and the sliding area of the sliding ladder. Then, when the sliding ladder slides downward, restricted by the block at the end of the rotating limit rod, the sliding ladder will not continue to slide downward and will be clamped on the support ladder under the limiting action of the rotating limit rod, improving the use safety. When the sliding ladder is usually moved upward, the rotating limit rod can rotate backward in the rotating groove, and then its rotation backward will not be restricted, and it is only necessary to overcome the torsional force of the torsion spring. When expanding outward, due to the restriction of the inner wall of the rotating groove in the thickened head, it cannot continue to rotate outward. Therefore, when the sliding ladder slides upward on the support ladder, the safety insurance component will not block and limit, and will not interfere during normal use. When the sliding ladder slides downward, the safety insurance component can play an emergency clamping role to prevent the sliding ladder from dropping sharply, improving the use safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic perspective view of a telescopic ladder for outdoor installation work proposed by the present utility model Figure 1 ;

[0025] Figure 2 FIG. is a schematic perspective view of a telescopic ladder for outdoor installation work proposed by the present utility model Figure 2 ;

[0026] Figure 3 is Figure 1 the enlarged schematic view of part A in

[0027] Figure 4 FIG. is a schematic perspective view of the safety insurance component Figure 1 ;

[0028] Figure 5 FIG. is a schematic perspective view of the safety insurance component Figure 2 ;

[0029] Figure 6 FIG. is the disassembled schematic view of the three-dimensional structure of the safety insurance component.

[0030] In the figure: 1, support ladder; 11, sliding strip; 2, sliding ladder; 21, card slot; 3, foot sleeve; 31, anti-slip groove; 4, limit screw; 5, adjustment knob; 6, safety insurance component; 61, mounting plate; 62, side support plate; 63, support member; 64, thickened head; 65, rotating groove; 66, rotating limit rod; 67, rotating shaft; 68, torsion reset spring; 69, sealing cover; 610, backing plate; 611, sliding cylinder; 612, sliding rod; 613, steel wire rope; 614, vertical sliding groove; 615, horizontal sliding groove; 616, raised square block. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0032] Refer to Figures 1-6 , a telescopic ladder for outdoor installation work, including a support ladder 1 and a sliding ladder 2. A number of footrest rods are fixedly and equidistantly installed in the middle positions of the support ladder 1 and the sliding ladder 2. A safety insurance assembly 6 is fixedly installed on the side of the sliding ladder 2; the safety insurance assembly 6 includes a mounting plate 61, a side support plate 62 is fixedly connected to the side of the mounting plate 61, a support member 63 is fixedly installed on the front side of the side support plate 62, a thickened head 64 is fixedly arranged at the end of the support member 63, a rotating groove 65 is opened inside the thickened head 64, a rotating limiting rod 66 is rotatably arranged inside the rotating groove 65, a rotating shaft 67 is fixedly installed at the rear end of the rotating limiting rod 66, the rotating shaft 67 rotates through to the outside of the thickened head 64, and a torsion return spring 68 is fixedly connected between the rotating shaft 67 and the thickened head 64. A sliding cylinder 611 is fixedly installed on the support member 63, a sliding rod 612 is slidably installed inside the sliding cylinder 611, and a steel wire rope 613 is fixedly connected between the sliding rod 612 and the rotating limiting rod 66.

[0033] With the above structure, when the sliding rod 612 is pulled inside the sliding cylinder 611, the rotating limiting rod 66 can be driven to rotate towards the inside of the support member 63 through the steel wire rope 613 at the end of the sliding rod 612, so that the outer end of the rotating limiting rod 66 exits the sliding area between the footrest rods of the support ladder 1 and the sliding ladder 2. When the sliding ladder 2 slides down on the support ladder 1, it will not be blocked, which is used when the sliding ladder 2 is retracted after use.

[0034] In this embodiment, a foot sleeve 3 is sleeved on the bottom of the support ladder 1, and an anti-slip groove 31 is opened on the foot sleeve 3.

[0035] With the above structure, the setting of the foot sleeve 3 improves the anti-slip performance at the bottom of the support ladder 1 and improves the use safety.

[0036] In this embodiment, a sliding strip 11 is fixedly installed on the rear side of the support ladder 1, a card slot 21 is opened on the front side of the sliding ladder 2, the sliding strip 11 is slidably clamped inside the card slot 21, a limiting screw rod 4 is screwed and installed on the side of the sliding ladder 2, the inner end of the limiting screw rod 4 is screwed through to the inside of the card slot 21, and an adjustment knob 5 is fixedly installed at the outer end of the limiting screw rod 4.

[0037] With the above structure, by rotating the adjustment knob 5, the limiting screw rod 4 can be rotated. When the inner end of the limiting screw rod 4 abuts against the sliding strip 11 inside the card slot 21 for limiting, the fixed clamping function of the sliding ladder 2 on the support ladder 1 is completed.

[0038] In this embodiment, the mounting plate 61 is mounted on the sliding ladder 2 by screwing. A sealing cover 69 is mounted on the side of the thickening head 64, and the torsion return spring 68 is located inside the sealing cover 69.

[0039] With the above structure, the sealing cover 69 is arranged outside the torsion return spring 68, which has a protective effect on the torsion return spring 68 and improves the service life of the torsion return spring 68.

[0040] In this embodiment, a backing plate 610 is mounted at the bottom of the rotation limiting rod 66. The backing plate 610 is a rubber pad. Vertical chutes 614 and horizontal chutes 615 are formed in the upper side wall of the sliding cylinder 611. A raised square block 616 is fixedly connected to the side wall of the sliding rod 612. The cross-sectional dimension of the raised square block 616 is adapted to the vertical chute 614 and the horizontal chute 615. An operation handle is fixedly mounted at the upper end of the sliding rod 612.

[0041] With the above structure, when the sliding rod 612 slides outward from the sliding cylinder 611, the raised square block 616 mounted on its side wall slides inside the vertical chute 614. When the raised square block 616 slides to the side of the horizontal chute 615, at this time, when the sliding rod 612 is rotated, the raised square block 616 is driven into the horizontal chute 615. Then, when the hand is released, under the torsion action of the torsion return spring 68, the sliding rod 612 will not slide down due to the clamping action between the raised square block 616 and the horizontal chute 615. This setting is used when the sliding ladder 2 is retracted after use.

[0042] In the present utility model, during use, the sliding ladder 2 slides on the support ladder 1. After adjusting the total length of the sliding ladder 2 and the support ladder 1, rotating the adjustment knob 5 can drive the limit screw rod 4 to rotate, so that the inner end of the limit screw rod 4 abuts against the slide bar 11 inside the card slot 21 for limiting, then the fixed clamping of the sliding ladder 2 on the support ladder 1 is completed. In addition, in the safety insurance assembly 6, the torsional reset function of the torsion return spring 68 drives the rotation limiting rod 66 to expand outward from the support member 63. When the rotation limiting rod 66 expands outward to abut against the inner side edge of the rotation slot 65, its outer end protrudes from the footrest rod of the support ladder 1 and the sliding area of the sliding ladder 2. Then, when the sliding ladder 2 slides downward, due to the blocking and limiting effect of the end of the rotation limiting rod, the sliding ladder will not continue to slide downward and will be clamped on the support ladder 1 under the limiting action of the rotation limiting rod 66, improving the use safety.

[0043] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0044] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A telescopic ladder for outdoor installation work, characterized in that: It comprises a supporting ladder (1) and a sliding ladder (2), wherein a plurality of footrests are fixedly installed at equal intervals in the middle of the supporting ladder (1) and the sliding ladder (2), and a safety insurance component (6) is fixedly installed on the side of the sliding ladder (2); The safety insurance component (6) comprises a mounting plate (61), a side support plate (62) is fixedly connected to the side of the mounting plate (61), a support member (63) is fixedly installed on the front side of the side support plate (62), a thickening head (64) is fixedly arranged at the end of the support member (63), a rotation groove (65) is provided inside the thickening head (64), a rotation limit rod (66) is rotatably arranged inside the rotation groove (65), and the rotation limit rod (66) is rearwardly movable. A rotating shaft (67) is fixedly installed at the end, and the rotating shaft (67) rotates and passes through the outside of the thickening head (64). A torsion return spring (68) is fixedly connected between the rotating shaft (67) and the thickening head (64). A slide cylinder (611) is fixedly installed on the support member (63), and a slide rod (612) is slidably installed on the inner side of the slide cylinder (611). A steel wire rope (613) is fixedly connected between the slide rod (612) and the rotation limit rod (66).

2. A telescopic ladder for outdoor installation work according to claim 1, characterized in that: The bottom of the support ladder (1) is sleeved with a sleeve foot (3), and the sleeve foot (3) is provided with an anti-slip groove (31).

3. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: A slide bar (11) is fixedly mounted on the rear side of the support ladder (1), a clamping groove (21) is provided on the front side of the slide ladder (2), and the slide bar (11) is slidably clamped inside the clamping groove (21).

4. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: A limiting screw rod (4) is threadedly mounted on the side of the sliding ladder (2), and the inner end of the limiting screw rod (4) is threadedly connected and passes through the inner side of the clamping groove (21).

5. The telescopic ladder for outdoor installation work according to claim 4, characterized in that: An adjusting knob (5) is fixedly mounted on the outer end of the limiting screw (4).

6. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: The mounting plate (61) is mounted on the sliding ladder (2) by screwing.

7. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: A sealing cover (69) is installed on the side of the thickening head (64), and the torsion return spring (68) is located inside the sealing cover (69).

8. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: A pad (610) is installed at the bottom of the rotation limiting rod (66), and the pad (610) is a rubber pad.

9. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: A vertical slide groove (614) and a horizontal slide groove (615) are provided on the upper side wall of the slide cylinder (611), and a protruding block (616) is fixedly connected to the side wall of the slide rod (612), wherein the cross-sectional dimensions of the protruding block (616) are adapted to the vertical slide groove (614) and the horizontal slide groove (615).

10. The telescopic ladder for outdoor installation work according to claim 1, characterized in that: An operating handle is fixedly mounted on the upper end of the slide rod (612).