CN219654610U - Folding locking device for platform ladder armrest - Google Patents

Abstract

The utility model discloses a folding locking device for a platform ladder handrail, which comprises a base, a platform frame, a climbing ladder, a movable handrail structure and an auxiliary fixing structure, wherein a plurality of universal wheels with brake devices are arranged at the bottom of the base, the platform frame is arranged on the upper end surface of the base, a guardrail frame is arranged at the platform frame, the climbing ladder is arranged on the upper end surface of the base at an oblique angle and is fixedly connected with one side of the platform frame, the movable handrail structure is arranged at the climbing ladder, and the auxiliary fixing structure is arranged at the movable handrail structure. The folding type grab rail fixing device can fold and adjust the fixing angle of the grab rail, and meanwhile, the whole structure of the auxiliary fixing structure is simple, and no precise structure such as a gear button is contained, so that the folding type grab rail fixing device is low in production and processing difficulty and low in production cost, is convenient to maintain and overhaul when faults and damages occur later, and has high practicability.

Description

Folding locking device for platform ladder armrest

Technical Field

The utility model relates to the technical field related to a platform ladder, in particular to a folding locking device for a handrail of the platform ladder.

Background

With the development of modern technology, the requirements of people on tools are increasing. The platform ladder is used as a common climbing tool and is widely applied to various fields of production and life. The handrail of the platform ladder is used as an important component of the platform ladder, so that personal safety of people in the climbing process is ensured, along with the development of the times, the handrail is gradually developed into a foldable handrail from a fixed handrail, the foldable handrail is more convenient to use, and the foldable handrail is used safely by being matched with a locking and locking mechanism, as follows.

Through retrieval, grant publication number CN208294422U discloses a folding locking device for a landing ladder armrest, comprising: a ladder; the upper end of the ladder is provided with a top cap; the top cap is provided with a handrail; the two ends of the armrests are respectively arranged at the two sides of the top cover cap; the two ends of the handrail are provided with handrail covers; the opposite surfaces of the armrests and the top cover cap are respectively provided with a first groove and a second groove; the first groove is arranged in the second groove to form a cavity; a circle of locking internal teeth are arranged on the inner wall of the first groove in the cavity, and a circle of fixing internal teeth are arranged on the inner wall of the second groove; a gear and a fixed shaft are arranged in the cavity; the gear can horizontally move in the cavity along the fixed shaft; the external teeth of the gear are respectively matched with the locking internal teeth and the fixing internal teeth; the outer side of the armrest cover is provided with a button, and the side surface of the button is contacted with the side surface of the gear; the button is provided with a rotation limiting device; and a reset spring piece is arranged between the first groove and the gear on the fixed shaft. Through the mode, the armrest can be easily folded and unfolded, and multi-angle locking and fixing of the armrest can be realized.

However, the above patent also has the following optimizations:

the handrail locking mechanism comprises various gears, shafts and buttons, so that the structure is complicated and precise, the handrail locking mechanism is inconvenient to maintain and repair when faults occur later, and the handrail locking mechanism is high in production and processing difficulty, high in cost and general in practicality.

Disclosure of Invention

The utility model aims to provide a folding locking device for a platform ladder handrail, which aims to solve the problems that the handrail locking mechanism of the platform ladder handrail comprises various gears, shafts and buttons, so that the structure is complicated and precise, the maintenance and the repair are inconvenient when the subsequent faults occur, the production and processing difficulties are high, the cost is high and the practicability is general.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a folding locking device of platform ladder handrail, includes base, platform frame, step ladder, activity handrail structure and auxiliary fixed structure, the bottom department of base is equipped with a plurality of universal wheels that have brake equipment, the platform frame erects the upper end surface department of installing in the base, platform frame department is equipped with the guardrail frame, step ladder oblique angle installs in the upper end surface department of base and with one side department fixed connection of platform frame, activity handrail structure installs in step ladder department of ascending, auxiliary fixed structure installs in activity handrail structure department.

Preferably, the movable handrail structure comprises a base, mounting blocks, supporting rods and handrail rods, wherein the base is fixedly arranged at the edge of a climbing ladder, the four mounting blocks are arranged, the four mounting blocks are fixedly arranged on the upper inclined surface of the base in a group of two pairs, the two supporting rods are arranged, the bottoms of the two supporting rods are movably hinged with the two groups of mounting blocks through pin shafts respectively, and the bottoms of the handrail rods are movably hinged with the tops of the two supporting rods through two connecting blocks and two pin shafts.

Preferably, the base, the mounting block, the support rod and the grab rail are all made of alloy materials.

Preferably, the movable handrail structure is provided with two groups, and the two groups of movable handrail structures are respectively arranged at the edges of the front side and the rear side of the ascending ladder.

Preferably, the grab rail is provided with an abutting block at one end close to the platform frame, and one side of the bottom of the abutting block abuts against one supporting rod close to the abutting block.

Preferably, the auxiliary fixing structure comprises two fixing blocks, two fixing rods and a fixing knob, wherein the two fixing blocks are fixedly arranged on the upper inclined surface of the base, one end of each fixing rod is movably hinged to one side of the supporting rod at the low position through a connecting piece and a pin shaft, a plurality of positioning holes are formed in the fixing rod, a plurality of threaded holes are formed in one fixing block, and one end of each fixing knob penetrates through one of the threaded holes through threaded connection and is connected with the positioning hole at the matching position.

The utility model provides a folding locking device for a platform ladder handrail, which has the following beneficial effects:

according to the utility model, the movable handrail structure and the auxiliary fixing structure are arranged, so that when the handrail is needed to be used, the handrail rod can be pulled up and adjusted to a required angle, and then one of the supporting rods is fixed through the auxiliary fixing structure, so that the supporting rods and the handrail rod are fixed, and the auxiliary fixing structure is simple in structure, simple to operate, labor-saving, convenient to maintain and repair rapidly when faults and damages occur later, and meanwhile, the production and processing difficulty is lower, the production cost is lower, and the practicability is higher.

Drawings

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

FIG. 2 is a schematic diagram of the mounting front view of the fixing rod of the present utility model;

FIG. 3 is a schematic top view of a mounting structure for a fixing rod according to the present utility model;

fig. 4 is an enlarged schematic view at a in fig. 1.

In the figure: 1. a base; 2. a platform stand; 3. a climbing ladder; 4. a base; 5. a mounting block; 6. a support rod; 7. a grab rail; 8. a connecting block; 9. an abutment block; 10. a fixed block; 11. a fixed rod; 12. fixing a knob; 13. positioning holes; 14. and (3) a threaded hole.

Description of the embodiments

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in fig. 1-4, the present utility model provides a technical solution: the utility model provides a folding locking device of ladder handrail, includes base 1, platform frame 2, step up ladder 3, activity handrail structure and auxiliary fixed knot construct, the bottom department of base 1 is equipped with a plurality of universal wheels that have brake equipment, the upper end surface department in base 1 is installed in the erection of platform frame 2, platform frame 2 departments are equipped with the guardrail frame, step up ladder 3 oblique angle install in the upper end surface department of base 1 and with one side department fixed connection of platform frame 2, activity handrail structure installs in step up ladder 3 departments, auxiliary fixed knot constructs installs in activity handrail structure department.

The movable handrail structure comprises a base 4, mounting blocks 5, supporting rods 6 and handrail rods 7, wherein the base 4 is fixedly arranged at the edge of a climbing ladder 3, four mounting blocks 5 are arranged, each of the four mounting blocks 5 is fixedly arranged at the upper inclined surface of the base 4 in a group, two supporting rods 6 are arranged, the bottoms of the two supporting rods 6 are respectively movably hinged with the two groups of mounting blocks 5 through pin shafts, the bottoms of the handrail rods 7 are movably hinged with the tops of the two supporting rods 6 through two connecting blocks 8 and two pin shafts, so that the handrail rods 7 can be matched with the supporting rods 6 and the mounting blocks 5 to be folded or pulled up, and when the movable handrail structure is used, protection personnel are pulled up, and when the movable handrail structure is not used, the movable handrail structure is folded to reduce occupied space;

the base 4, the mounting block 5, the support rod 6 and the grab rail 7 are all made of alloy materials, so that the base 4, the mounting block 5, the support rod 6 and the grab rail 7 have high self-rigidity and are not easy to deform and damage;

the movable handrail structures are provided with two groups, and the two groups of movable handrail structures are respectively arranged at the edges of the front side and the rear side of the ascending ladder 3, so that the front side and the rear side of the ascending ladder 3 can be protected;

the support rod 7 is provided with an abutting block 9 at one end close to the platform frame 2, one side of the bottom of the abutting block 9 abuts against one adjacent support rod 6, so that when the support rod 7 is pulled up to the highest position, certain limiting treatment can be carried out on the support rod 7 through the abutting between the abutting block 9 and the support rod 6, the support rod 7 can not be folded and moved downwards any more, and a user can conveniently hold the support rod 7 and borrow force when ascending;

the auxiliary fixing structure comprises fixing blocks 10, fixing rods 11 and fixing knobs 12, wherein the fixing blocks 10 are provided with two fixing blocks 10 which are fixedly arranged on the upper inclined surface of the base 4, one end of each fixing rod 11 is movably hinged to one side of each supporting rod 6 at the low position through a connecting piece and a pin shaft, a plurality of positioning holes 13 are formed in the fixing rods 11, a plurality of threaded holes 14 are formed in one fixing block 10, one end of each fixing knob 12 penetrates through one threaded hole 14 through threaded connection and is connected with one positioning hole 13 at the matched position, after the handrail rod 7 is pulled up to a certain angle, a user can fix the fixing rods 11 through the connection of the fixing knobs 12 and the positioning holes 13 at the fixing rods 11, then the handrail rod 7 and the other supporting rods 6 are fixed, the user cannot fold and rotate conveniently, when the angle of the handrail rod 7 and the supporting rods 6 needs to be adjusted, the fixing knobs 12 are replaced, and the fixing knobs 12 and the fixing holes 13 are connected with the fixing rods 6, and the angle of the fixing knobs 12 can be adjusted.

Working principle: after the grab bar 7 is pulled up to a certain angle, a user can fix the fixed bar 11 through the connection of the fixed knob 12 and the locating hole 13 at the fixed bar 11, so that one of the support bars 6 is fixed, then the grab bar 7 and the other support bar 6 are fixed, so that the grab bar 7 and the other support bar 6 cannot be folded and rotated again, the user can be protected and forced to use, when the angle of the grab bar 7 and the support bar 6 needs to be adjusted, the angle of the grab bar 7 and the support bar 6 can be adjusted only by loosening the fixed knob 12 and replacing the threaded hole 14 connected with the fixed knob 12 and the locating hole 13 connected with the fixed mounting.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. Folding locking device of platform ladder handrail, including base (1), platform frame (2), ladder (3) of ascending a height, activity handrail structure and auxiliary fixed knot construct, its characterized in that: the base (1) bottom department is equipped with a plurality of universal wheels that have brake equipment, platform frame (2) erect and install in the upper end surface department of base (1), platform frame (2) department is equipped with the guardrail frame, ascending ladder (3) oblique angle install in the upper end surface department of base (1) and with one side department fixed connection of platform frame (2), movable handrail structure installs in ascending ladder (3) department, supplementary fixed knot constructs installs in movable handrail structure department.

2. The landing ladder armrest folding locking device of claim 1, wherein: the movable handrail structure comprises a base (4), mounting blocks (5), supporting rods (6) and handrail rods (7), wherein the base (4) is fixedly arranged at the edge of a climbing ladder (3), the four mounting blocks (5) are arranged at the positions, which are fixedly arranged on the upper inclined surfaces of the base (4), of each two groups of the mounting blocks (5), the two supporting rods (6) are arranged at the positions, which are respectively hinged with the two groups of the mounting blocks (5), of the bottoms of the supporting rods (6) through pin shafts, and the bottoms of the handrail rods (7) are hinged with the tops of the two supporting rods (6) through two connecting blocks (8) and two pin shafts.

3. The landing ladder armrest folding locking device of claim 2, wherein: the base (4), the mounting block (5), the support rod (6) and the grab rail (7) are all made of alloy materials.

4. The landing ladder armrest folding locking device of claim 2, wherein: the movable handrail structure is provided with two groups, and the two groups of movable handrail structures are respectively arranged at the edges of the front side and the rear side of the ascending ladder (3).

5. The landing ladder armrest folding locking device of claim 2, wherein: the grab rail (7) is provided with an abutting block (9) at one end close to the grab rail (Ping Taijia) (2), and one side of the bottom of the abutting block (9) abuts against one supporting rod (6) close to the abutting block.

6. The landing ladder armrest folding locking device of claim 1, wherein: the auxiliary fixing structure comprises fixing blocks (10), fixing rods (11) and fixing knobs (12), wherein the fixing blocks (10) are provided with two fixing blocks (10) which are fixedly installed on the upper inclined surface of a base (4), one end of each fixing rod (11) is movably hinged to one side of a supporting rod (6) at a low position through a connecting piece and a pin shaft, a plurality of positioning holes (13) are formed in the fixing rods (11), a plurality of threaded holes (14) are formed in one fixing block (10), and one end of each fixing knob (12) penetrates through one of the threaded holes (14) through threaded connection and is connected with the positioning hole (13) at the matching position.