CN107859475B - Height Adjustable Fall-Proof Aerial Work Platform Ladder - Google Patents

Abstract

The present invention relates to a height-adjustable anti-falling aerial work platform ladder, comprising a flat plate for supporting an operator, a mounting mechanism fixed to an equipment channel steel is provided on the lower plate surface of the flat plate, a supporting column is provided on the upper plate surface of the flat plate, a fastener is provided on the supporting column, a hanging ring for fixing a safety belt is provided on the fastener, a supporting frame and a ladder frame are provided on the flat plate, one end of the ladder frame is rotatably connected to one end of the supporting frame and the rotating shaft is horizontal, the other end of the ladder frame is rotatably connected to the flat plate, the other end of the support frame forms a detachable rotating connection with the flat plate, the rotating shafts of the support frame and the ladder frame are horizontal and parallel to each other, the platform is fixed to the equipment channel steel by the mounting mechanism, thereby effectively fixing the anti-falling device, the operator steps on the flat plate, the safety belt passes through the hanging ring, a herringbone ladder composed of the supporting frame and the ladder frame is provided on the flat plate, the operator steps on the ladder frame, thereby performing operations at different height positions.

Description

Height Adjustable Fall-Proof Aerial Work Platform Ladder

Technical Field

The invention relates to the technical field of electric power maintenance equipment, and in particular to a height-adjustable anti-falling aerial work platform ladder.

Background technique

Now, whether it is the central or local governments, production safety is placed at the top of all management. As a power enterprise of State Grid Corporation, production safety is placed at the top of all management work, and personal safety is placed in the first place, as a red line that cannot be touched. In the construction of power grids and equipment maintenance, various safety measures must be implemented to prevent accidents with minor personal injuries or above. The State Grid Corporation's power safety work regulations stipulate that when working without scaffolding or on scaffolding without railings, when the height exceeds 1.5 meters, a safety belt should be used, or other reliable safety measures should be taken. There are also regulations: The hook or rope of the safety belt should be hung on a strong and firm component, or on a steel wire rope specially used for hanging safety belts, and the method of high hanging and low use should be adopted. It is prohibited to hang on moving or unstable objects [such as disconnector (knife switch) support insulators, CVT insulators, busbar support insulators, lightning arrester support insulators, etc.].

There are the following problems in high-altitude operations in substations: 1. When the height exceeds 1.5 meters, a safety belt should be used, but the safety belt cannot be hung on the supporting insulators of the isolating switch (knife switch), CVT insulators, busbar support insulators, and lightning arrester support insulators. If the safety belt is hung on the insulator, it is a serious violation of regulations. When the insulator breaks, it will cause a personal safety accident of falling from a height; 2. Safety supervisors repeatedly violate regulations by hanging the safety belt on the insulator during on-site supervision; 3. The boom truck cannot enter the work site and cannot be used; 4. When setting up a ground-based operating platform, the electrical safety distance is not easy to meet the requirements, and the setting up time is relatively long; 5. No special equipment is sold; 6. When inspecting the knife switch or circuit breaker, you can only stand on the bracket channel steel, which affects work efficiency; 7. Standing on the equipment frame channel steel, the height is insufficient and it is inconvenient to work and construct; 8. For many years, the violation of high-altitude operations in substation electrical maintenance has not been resolved.

Summary of the invention

The purpose of the present invention is to provide a height-adjustable anti-fall aerial work platform ladder, which can facilitate operators to stand at different heights of the platform to perform operations and ensure the safety of the operators.

To achieve the above object, the present invention adopts the following technical solution:

A height-adjustable anti-fall aerial work platform ladder comprises a flat plate for supporting an operator, the lower plate surface of the flat plate is provided with a mounting mechanism fixed to an equipment channel steel, the upper plate surface of the flat plate is provided with a support column, the support column is provided with a fastener, the fastener is provided with a hanging ring for fixing a safety belt, a support frame and a ladder frame are provided on the flat plate, one end of the ladder frame is rotatably connected to one end of the support frame and the rotating shaft is horizontal, the other end of the ladder frame is rotatably connected to the flat plate, the other end of the support frame forms a detachable rotating connection with the flat plate, and the rotating shafts of the support frame and the ladder frame are horizontal and parallel to each other.

The present invention also has the following features:

The flat plate is provided with a groove for accommodating the support frame and the ladder frame, one end of the ladder frame is connected to one end of the support frame through a connecting shaft, the other end of the ladder frame is provided with a rotating shaft that is rotatably connected to both sides of the groove, and the other end of the support frame is provided with a card slot that forms a card-fitting fit with a locking shaft provided on the side of the groove.

A locking hook is rotatably arranged above the slot, and the locking hook and the locking shaft form a snap-in or separation fit.

The mounting mechanism includes a screw rod arranged on a flat plate, the lower end of the screw rod is threadedly connected to the positioning block, a locking nut is arranged at the rod end of the screw rod extending out of the positioning block, a fixed arm is arranged on the positioning block, the fixed arm is horizontally cantilevered and a limiting screw is arranged at the cantilevered end, a bayonet for clamping the equipment channel steel is formed between the limiting screw, the fixed arm and the positioning block, a baffle is arranged on the positioning block, and the angle between the plate surface of the baffle and the length direction of the fixed arm is 90°.

The fastener includes an anti-slip belt hooped on the support column, the two ends of the anti-slip belt are respectively connected to one end of the connecting buckle, the other end of the connecting buckle is respectively rotatably connected to the two ends of the driving roller, the rotating connection end of the connecting buckle and the driving roller is eccentrically arranged with the roller core of the driving roller, and the hanging ring is set on the driving roller.

The anti-slip belt is in a rod shape and is made of rubber material. A cantilever is arranged in the middle section of the roller body of the driving roller, and the hanging ring is arranged at the overhanging end of the cantilever.

An anti-dropping bolt is arranged at the upper end of the support column. The length direction of the anti-dropping bolt is horizontal and connected to the threaded hole on the outer wall of the upper end of the support column.

A clamping plate is arranged on the side of the flat plate, and the clamping plate is in the shape of a groove plate with the groove facing downward. A plug-in block connected to the support column is arranged in the middle position of the clamping plate. A through bolt is arranged on the support column, and a second fastening nut is arranged at the rod end of the through bolt. Limiting blocks are arranged on both sides of the plug-in block.

The clamping plate is provided with a strip hole for the screw rod to pass through, and the strip hole is parallel to the length direction of the clamping plate.

Compared with the prior art, the technical effect of the present invention is as follows: the platform is fixed on the equipment channel steel through the mounting mechanism, thereby achieving effective fixation of the anti-fall device, the operator steps on the flat plate, the safety belt passes through the hanging ring, and a herringbone ladder composed of a support frame and a ladder frame is arranged on the flat plate, the operator steps on the ladder frame, thereby being able to perform operations at different heights.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a height-adjustable anti-fall aerial work platform ladder in use;

FIG2 is a top view of a flat plate in a height-adjustable fall-prevention aerial work platform ladder;

FIG3 is a front view of the fastener;

FIG4 is a top view of the fastener and the support column installation;

FIG5 is a schematic diagram of the structure of a screw rod;

FIG. 6 is a schematic diagram of the support frame and the ladder frame in an unfolded state.

Detailed ways

In conjunction with Figures 1 to 6, the present invention is further described:

A height-adjustable anti-fall aerial work platform ladder comprises a flat plate 10 for supporting an operator, a mounting mechanism fixed to an equipment channel steel 20 is provided on the lower plate surface of the flat plate 10, a support column 40 is provided on the upper plate surface of the flat plate 10, a fastener 50 is provided on the support column 40, a hanging ring 51 for fixing a safety belt is provided on the fastener 50, a support frame 31 and a ladder frame 32 are provided on the flat plate 10, one end of the ladder frame 32 is rotatably connected to one end of the support frame 31 and the rotation axis is horizontal, the other end of the ladder frame 32 is rotatably connected to the flat plate 10, the other end of the support frame 31 is detachably rotatably connected to the flat plate 10, and the rotation axes of the support frame 31 and the ladder frame 32 are horizontal and parallel to each other;

As shown in Figures 1 and 6, the platform 10 is fixed to the equipment channel steel 20 through a mounting mechanism, thereby achieving effective fixation of the anti-fall device. The operator steps on the flat plate 10, passes the safety belt through the hanging ring 51, and a herringbone ladder consisting of a support frame 31 and a ladder frame 32 is set on the flat plate. The operator steps on the ladder frame 32, so that operations can be performed at different heights.

As a preferred solution of the present invention, the flat plate 10 is provided with a groove 11 for accommodating a support frame 31 and a ladder frame 32, one end of the ladder frame 32 is connected to one end of the support frame 31 through a connecting shaft 33, the other end of the ladder frame 32 is provided with a rotating shaft 321 which is rotatably connected to both sides of the groove 11, and the other end of the support frame 31 is provided with a card slot 311 which is engaged with a locking shaft 111 provided on the side of the groove 11;

When the above-mentioned stepladder is in use, the card slot 311 of the support frame 31 is snap-fitted with the locking shaft 111 set on the side of the groove 11, so that the support frame 31 and the ladder frame 32 are in an open state, which is convenient for the operator to use. When the stepladder is not in use, the support frame 31 is folded up, and the ladder frame 32 is in the middle of the support frame 31. The support frame 31 and the ladder frame 32 are folded into a flat plate and accommodated in the groove 11, thereby reducing the space occupied by the above-mentioned support frame 31 and the ladder frame 32.

As shown in Figure 6, in order to prevent the locking shaft 111 set on the side of the groove 11 from moving out of the slot 311 of the support frame 31, a locking hook 312 is rotatably arranged above the slot 311, and the locking hook 312 and the locking shaft 111 form a snap-on or separate fit. Under the action of its own gravity, the above-mentioned locking hook 312 can be rotated to the bottom of the locking shaft 111 to lock the locking shaft 111.

Specifically, the mounting mechanism includes a screw rod 60 provided on the flat plate 10, the lower end of the screw rod 60 is threadedly connected to the positioning block 61, the rod end of the screw rod 60 extending out of the positioning block 61 is provided with a locking nut 62, the positioning block 61 is provided with a fixed arm 63, the fixed arm 63 is horizontally cantilevered and a limiting screw 631 is provided at the cantilevered end, and a bayonet for clamping the equipment channel steel 20 is formed between the limiting screw 631, the fixed arm 63 and the positioning block 61, and a baffle 611 is provided on the positioning block 61, and the angle between the plate surface of the baffle 611 and the length direction of the fixed arm 63 is 90°.

The operator can extend the screw rod 60 downward from the flat plate 10 to the side of the equipment channel steel 20, and rotate the above-mentioned screw rod 60 so that the bayonet formed by the above-mentioned limit screw rod 631, the fixed arm 63 and the positioning block 61 is clamped on the equipment channel steel 20, and under the action of the baffle 611, the further rotation of the fixed arm 33 is limited to realize the automatic clamping of the equipment channel steel 20, which is extremely convenient for single-person operation. Then, the screw rod 60 is rotated on the flat plate 10, so that the screw rod 60 is located at the positioning block 61 and rotates until the above-mentioned positioning block 61 is clamped on the flat plate 10, thereby achieving the fixation of the platform.

The fastener 50 includes an anti-slip belt 52 hooped on the support column 40, and the two ends of the anti-slip belt 52 are respectively connected to one end of a connecting buckle 53, and the other end of the connecting buckle 53 is respectively rotatably connected to the two ends of a driving roller 54, and the rotating connection end of the connecting buckle 53 and the driving roller 54 is eccentrically arranged with the roller core of the driving roller 54, and the hanging ring 51 is set on the driving roller 53.

The anti-slip belt 52 is in a rod shape and is made of rubber material. A cantilever 541 is provided at the middle section of the roller body of the driving roller 54 , and the hanging ring 51 is provided at the overhanging end of the cantilever 541 .

An anti-dropping bolt 43 is disposed at the upper end of the support column 40 . The anti-dropping bolt 43 is horizontal in length and connected to a threaded hole on the outer wall of the upper end of the support column 40 .

A clamping plate 12 is arranged on the side of the flat plate 10. The clamping plate 12 is in the shape of a grooved plate with the groove facing downward. A plug-in block 13 connected to the support column 40 is arranged in the middle position of the clamping plate 12. A through bolt 41 is arranged on the support column 40. A second fastening nut 42 is arranged at the rod end of the through bolt 41. Limiting blocks 131 are arranged on both sides of the plug-in block 13.

The clamping plate 12 is provided with a strip hole 121 for the screw rod 30 to pass through, and the strip hole 121 is parallel to the length direction of the clamping plate 12 .

It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims (7)

1. A height-adjustable anti-fall aerial work platform ladder, characterized in that: it comprises a flat plate (10) for supporting an operator, the lower plate surface of the flat plate (10) is provided with a mounting mechanism fixed to an equipment channel steel (20), the upper plate surface of the flat plate (10) is provided with a support column (40), the support column (40) is provided with a fastener (50), the fastener (50) is provided with a hanging ring (51) for fixing a safety belt, the flat plate (10) is provided with a support frame (31) and a ladder frame (32), one end of the ladder frame (32) is rotatably connected to one end of the support frame (31) and the rotation axis is horizontal, the other end of the ladder frame (32) is rotatably connected to the flat plate (10), the other end of the support frame (31) is detachably rotatably connected to the flat plate (10), and the rotation axes of the support frame (31) and the ladder frame (32) are horizontal and parallel to each other; The mounting mechanism comprises a screw rod (60) arranged on the flat plate (10), the lower end of the screw rod (60) being threadedly connected to the positioning block (61), the rod end of the screw rod (60) extending out of the positioning block (61) being provided with a locking nut (62), the positioning block (61) being provided with a fixing arm (63), the fixing arm (63) being horizontally cantilevered and a limiting screw rod (631) being provided at the cantilevered end, a bayonet for clamping the equipment channel steel (20) being formed between the limiting screw rod (631), the fixing arm (63) and the positioning block (61), the positioning block (61) being provided with a baffle plate (611), the angle between the plate surface of the baffle plate (611) and the length direction of the fixing arm (63) being 90°; The fastener (50) comprises an anti-slip belt (52) which is hooped on the support column (40), the two ends of the anti-slip belt (52) are respectively connected to one end of a connecting buckle (53), the other end of the connecting buckle (53) is respectively rotatably connected to the two ends of a driving roller (54), the rotatably connected end of the connecting buckle (53) and the driving roller (54) is eccentrically arranged with the roller core of the driving roller (54), and the hanging ring (51) is arranged on the driving roller (54). 2. The height-adjustable anti-fall aerial work platform ladder according to claim 1 is characterized in that: a groove (11) for accommodating a support frame (31) and a ladder frame (32) is provided on the flat plate (10), one end of the ladder frame (32) is connected to one end of the support frame (31) through a connecting shaft (33), the other end of the ladder frame (32) is provided with a rotating shaft (321) rotatably connected to both sides of the groove (11), and the other end of the support frame (31) is provided with a card slot (311) to form a card fit with a locking shaft (111) provided on the side of the groove (11). 3. The height-adjustable anti-fall aerial work platform ladder according to claim 2 is characterized in that a locking hook (312) is rotatably provided above the slot (311), and the locking hook (312) and the locking shaft (111) form a snap-on or release fit. 4. The height-adjustable anti-fall aerial work platform ladder according to claim 1 is characterized in that: the anti-slip belt (52) is rod-shaped and made of rubber material, a cantilever (541) is provided in the middle section of the roller body of the driving roller (54), and the hanging ring (51) is provided at the overhanging end of the cantilever (541). 5. The height-adjustable anti-fall aerial work platform ladder according to claim 4 is characterized in that an anti-drop bolt (43) is provided at the upper end of the support column (40), and the anti-drop bolt (43) is horizontal in length direction and connected to the threaded hole on the outer wall of the upper end of the support column (40). 6. The height-adjustable anti-fall aerial work platform ladder according to claim 1 is characterized in that: a splint (12) is arranged on the side of the flat plate (10), the splint (12) is in the shape of a groove plate with the groove facing downward, a plug-in block (13) connected to the support column (40) is arranged in the middle position of the splint (12), a through bolt (41) is arranged on the support column (40), a second fastening nut (42) is arranged at the rod end of the through bolt (41), and limit blocks (131) are arranged on both sides of the plug-in block (13). 7. The height-adjustable anti-fall aerial work platform ladder according to claim 6 is characterized in that: a strip hole (121) for the screw rod (30) to pass through is opened on the clamping plate (12), and the strip hole (121) is parallel to the length direction of the clamping plate (12).