High ladder single-person operation auxiliary equipment

Abstract

This invention discloses a high ladder single-person work assistance device, comprising a single-sided ladder composed of a ladder frame and a support frame, and a foot piece for connecting two parallel ladder frames. The ladder frame has a single interconnected vertical slot and multiple arc slots. The foot piece has a connecting protrusion that slides within the vertical slot and is used for parallel / offset engagement with the arc slots to unfold / fold the single-sided ladder. The high ladder single-person work assistance device provided by this invention, by placing the foot piece at an angle, allows the two ladder frames to be arranged close together through the offset engagement of the foot piece, and the ladder frames, together with connecting rods, form a parallelogram shape. The support frame then abuts against the ladder frame, enabling the two ladder frames to be folded together with the support frame, forming a three-bar support. This allows the single-sided ladder to be folded into a climbing ladder, enabling direct climbing use in smaller work environments, increasing the applicability and additional stability of the single-sided ladder.

Description

Technical Field

[0001] This invention relates to the field of single-person work ladder technology, and more specifically to a high ladder single-person work auxiliary device. Background Technology

[0002] When a single person needs to work at height during construction, a ladder is usually used as an auxiliary tool for climbing. Common types include straight ladders and single-sided ladders.

[0003] According to the publication (announcement) number: CN105350898B, the publication (announcement) date: 2017-06-30, a non-slip single-person working A-frame ladder is disclosed. Compared with the prior art, the non-slip single-person working A-frame ladder of the present invention, with the help of shoe ears set on the footboard and load-bearing suction cups set on the bottom surface of the side plate, allows a single person to control the movement of the ladder on the ladder, which is not only non-slip and safe, but also convenient and efficient.

[0004] According to publication number CN116146095A, a climbing ladder is disclosed. This design involves moving the ladder to the desired position, extending the support rod outwards, and then adjusting the positioning feet to lower them and make contact with the ground. This, combined with an anti-tipping component, secures the support to the ground, preventing tipping and shaking or movement during operation. Once the ladder is firmly fixed to the ground, workers can climb to a preset height using the steps to perform related operations, improving safety and allowing for flexible use according to actual needs.

[0005] In existing technologies, including the aforementioned patents, straight ladders can only be placed against a wall during use. Therefore, changing the work position requires personnel to descend from the ladder and move it to a new location. Single-sided ladders, on the other hand, are typically equipped with casters to facilitate adjustment of their position. However, straight ladders, due to their smaller diameter crossbars, occupy less space and require less workspace for transport and placement. Single-sided ladders, with their multiple footboards and support rods, require more support to ensure stability during operation. The support rods and the ladder surface are welded together, resulting in a larger space occupied by the single-sided ladder. This requires more work space during handling and placement. While there are single-sided ladders on the market with foldable support rods, the space required is still relatively large due to the presence of the ladder surface. When the construction environment is in an alley or a small workspace, the large space occupied by the single-sided ladder presents certain limitations in its use. In such cases, the straight ladder, due to the smaller diameter of its upper crossbar, cannot have the ladder surface and footboards that are provided with the single-sided ladder. In such limited work environments, the straight ladder also presents certain safety concerns. Summary of the Invention

[0006] The purpose of this invention is to provide a single-person working assistance device for high ladders, which solves the problem that single-sided ladders occupy a large space and have certain limitations in use when working in a small space environment.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a single-person working auxiliary device for a high ladder, comprising a single-sided ladder composed of a ladder frame and a support frame, and a stepping piece for connecting two parallel ladder frames, wherein the ladder frame has a single interconnected vertical slot and multiple arc-shaped slots, wherein:

[0008] The stepping piece is provided with a connecting protrusion, which slides in the vertical slot hole and is used to parallel / misalign the assembly arc slot hole to unfold / merge the single-sided ladder.

[0009] Preferably, the ladder frame is provided with multiple folding frames and is slidably assembled with multiple foot pedals to form a sitting section, a connecting section, and a foot pedal.

[0010] Preferably, the foot pedal is structurally divided into a frame and a foot pedal, and the foot pedal is provided with a connecting shaft and a ratchet;

[0011] The rotating shaft is circumferentially mounted on the frame so that the foot pedals can engage with the single-sided ladder in both the unfolded and folded states.

[0012] Preferably, it also includes a replacement component, which includes a trigger and an arc pawl and a pull rod disposed thereon. The trigger is used to assemble sequentially with the guide slot segment opened on the plate frame and acts on the following two workstations:

[0013] In the first station, the arc pawl engages with the ratchet, so that the foot pedal cooperates with the single-sided ladder in the combined state;

[0014] In the second station, the trigger disengages from the ratchet, allowing the foot pedal to engage with the single-sided ladder in its unfolded state.

[0015] Preferably, the pull rod is provided with a locking rod, and the foot pedal is provided with a central locking groove;

[0016] The end of the lever is engaged in the central slot to lock the foot pedal in the first working position.

[0017] Preferably, a C-shaped clamp is slidably disposed on the plate frame, and the pull rod is moved to hook the C-shaped clamp to lock the foot pedal in the second working position.

[0018] Preferably, the trigger is provided with a push rod, and the pull rod is fixedly installed with a ratchet ring sleeve;

[0019] The push rod and the arc plate on the plate frame slide together to deflect the pull rod at a predetermined angle and engage the ratchet ring with the ratchet wheel.

[0020] Preferably, it also includes a fastening assembly, which includes a triangular block disposed on the trigger, and a ratchet sleeve is movably disposed on the plate frame;

[0021] The trigger causes the triangular block to abut against the ratchet sleeve, so that the ratchet sleeve and the ratchet wheel can be engaged.

[0022] Preferably, a vertical locking post is fixedly installed on the triangular block, and a horizontal locking rod is fixedly installed on the ratchet sleeve;

[0023] The vertical locking post and the horizontal locking rod cooperate to form a cross-shaped locking trigger.

[0024] Preferably, a locking rod is fixedly installed on the horizontal locking rod, and a pin is movably provided on the folding frame;

[0025] The locking rod abuts against the push rod to lock the frame.

[0026] In the above technical solution, the high ladder single-person operation auxiliary device provided by the present invention has the following beneficial effects: by placing the stepping piece at an angle and making the connecting protrusion slide into the vertical slot hole on the ladder frame first, and then making the connecting protrusion engage in the high hole in the arc slot hole at a higher position, the staggered stepping piece brings the two ladder frames closer together and makes the ladder frames cooperate with the connecting rod to form a parallelogram shape. Then, the connecting protrusion on the support frame deflects around the arc slot hole so that the support frame abuts against the ladder frame, realizing the folding of the two ladder frames with the support frame and forming a three-bar support, thereby enabling the single-sided ladder to be folded into a climbing ladder, so that the single-sided ladder can be directly used for climbing in a small working environment, increasing the applicability and additional stability of the single-sided ladder. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0028] Figure 1 This is a schematic diagram of the ladder frame and support frame in their unfolded, overhead configuration according to an embodiment of the present invention.

[0029] Figure 2 This is a front view of the ladder frame and support frame combined in an embodiment of the present invention.

[0030] Figure 3This is a schematic diagram of the unfolded structure of the upper end of the ladder frame provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the foot pedal component and a portion of the folding frame structure provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the locking rod structure provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic cross-sectional view of the left side of the foot pedal component structure provided in an embodiment of the present invention;

[0034] Figure 7 This is a right-side sectional view of the structure of the foot pedal component provided in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the left side of the structure of the replacement component and the fastening component provided in an embodiment of the present invention;

[0036] Figure 9 The diagram on the right side shows the structure of the replacement component and fastening component provided in the embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Ladder frame; 10. Connecting rod; 11. Support frame; 2. Step component; 20. Connecting protrusion; 21. Vertical slot hole; 22. Arc slot hole; 221. High position hole; 222. Low position hole; 23. Folding frame; 231. Seat section; 232. Connecting section; 233. Step section; 24. Plate frame; 240. Workstation slot hole; 241. Foot pedal; 242. Support plate; 243. Rotating shaft; 244. Ratchet; 3. Replacement assembly; 31. Trigger; 310. Buckle plate; 311. C-shaped frame; 312. Arc pawl; 313. First elastic element; 314. Push rod; 315. Pull rod; 316. Guide shaft; 3161. Stop block; 3162. Second elastic element; 32. Guide slot section 321. Horizontal groove; 322. First arc groove; 323. Second arc groove; 33. Arc plate; 330. Plate arc groove section; 331. Front spiral section; 332. Horizontal section; 333. Rear spiral section; 34. Ratchet ring sleeve; 341. Lever; 35. C-type clamp; 351. Lever horizontal groove; 352. Lever arc groove; 36. Locking rod; 361. Arc locking groove; 362. Middle locking groove; 4. Fastening assembly; 41. Triangular block; 411. Connecting rod; 42. Ratchet sleeve; 421. Retaining ring; 422. Third elastic element; 43. Vertical locking post; 431. First rod groove; 44. Horizontal locking rod; 441. Second rod groove; 45. Locking rod; 451. Pin; 452. Pin hole. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-9 As shown, a single-person working assistance device for a high ladder includes a single-sided ladder composed of a ladder frame 1 and a support frame 11, and a stepping piece 2 for connecting two parallel ladder frames 1. The ladder frame 1 has a single vertical slot 21 and multiple arc slots 22 that are interconnected.

[0041] The stepping piece 2 is provided with a connecting protrusion 20, which slides in the vertical slot hole 21 and is used for parallel / misaligned engagement with the arc slot hole 22 to unfold / merge the single-sided ladder.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, two parallel ladder frames 1 are hinged together by vertically arranged connecting rods 10, so that the ladder frame 1 and connecting rod 10 on one side form a quadrilateral. The two ladder frames 1 and connecting rods 10 on the same side are grouped together and symmetrically arranged on both sides of the step pieces 2 to form the ladder surface of a single-sided ladder. Multiple step pieces 2 are provided on the ladder surface. Rubber pads are provided at the bottom of both the ladder frame 1 and the support frame 11, and rubber pads are also provided on the side wall above the support frame 11 and away from the ladder frame 1. This allows the single-sided ladder to provide anti-slip and cushioning when the support frame 11 is placed against the wall after being combined.

[0043] Furthermore, the apex of the arc groove hole 22 faces downwards, and a high-position hole 221 is provided at the end of the arc groove hole 22 away from the position communicating with the vertical groove hole 21, while a low-position hole 222 is provided at the apex of the arc groove hole 22. A connecting protrusion 20 is also provided on the support frame 11, and the connecting protrusion 20 on the support frame 11 and one of the ladder rod frames 1 share a vertical groove hole 21. This allows the two connecting protrusions 20 on one side of the step piece 2 to automatically engage horizontally with the two low-position holes 222 under the action of gravity when the single-sided ladder is in the unfolded state. This allows the ladder rod frame 1 on one side of the single-sided ladder to form a rectangular shape with the connecting rod 10, enabling the step piece to be horizontally engaged when the single-sided ladder is in the unfolded working state. The step 2 has a larger foot contact surface, increasing the safety of construction workers. At the same time, when the single-sided ladder is in the combined state, the step 2 is placed at an angle, and one of the connecting protrusions 20 is engaged in the low hole 222 on one of the ladder rods 1, and the other connecting protrusion 20 is engaged in the high hole 221 on the other ladder rod 1, so that the two ladder rods 1 on one side are as close as possible, and with the help of the connecting rod 10, one side of the single-sided ladder forms a parallelogram shape. Then, the support frame 11 is moved closer to the ladder rod 1, so that the two ladder rods 1 on one side of the single-sided ladder and one side of the support frame 11 form a three-bar support, thereby realizing the folding of the single-sided ladder into a climbing ladder.

[0044] Furthermore, when the single-sided ladder is in the unfolded working state, during the process of placing multiple step pieces 2 through the arc groove holes 22, some two step pieces 2 are placed across the arc groove holes 22 to increase the spacing between the step pieces 2. This allows construction materials to be placed on the step pieces 2 with increased spacing, improving the convenience for construction personnel to access them. At the same time, the construction materials with a certain weight can also increase the counterweight of the single-sided ladder during operation, improving the safety of the single-sided ladder during operation.

[0045] In the above embodiments, the driving source for moving away from or towards the two ladder frames 1 can be an electric push rod, or a motor combined with a screw to drive it, or any existing mechanism or component known to those skilled in the art.

[0046] In the above scheme, by placing the stepping piece 2 at an angle and allowing the connecting protrusion 20 to slide first into the vertical slot 21 on the ladder frame 1, and then engaging the connecting protrusion 20 into the high-position hole 221 in the higher arc slot 22, the staggered stepping piece 2 brings the two ladder frames 1 closer together, and the ladder frames 1, together with the connecting rod 10, form a parallelogram shape. Then, the connecting protrusion 20 on the support frame 11 is deflected around the arc slot 22, so that the support frame 11 abuts against the ladder frame 1, realizing the folding of the two ladder frames 1 together with the support frame 11 to form a three-bar support. This allows the single-sided ladder to be folded into a climbing ladder, enabling the single-sided ladder to be used directly in a smaller working environment, increasing the applicability and additional stability of the single-sided ladder.

[0047] As a further embodiment of the present invention, the ladder frame 1 is provided with a plurality of folding frames 23, which are slidably assembled with a plurality of foot pedals 2 to form a seat section 231, a connecting section 232 and a foot pedal section 233.

[0048] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, multiple folding frames 23 are hinged together, and the folding frames 23 are provided with interconnected channels so that the two connecting protrusions 20 on one side of the pedal component 2 can slide in the channels, so that the multiple pedal components 2 can maintain translational movement relative to the folding frames 23.

[0049] Furthermore, the seat section 231, connecting section 232, and foot section 233 are arranged perpendicularly to each other, forming a "Z" shape. The seat section 231 is hinged to the upper end of the ladder frame 1. The seat section 231 is used for construction workers to sit down, the foot section 233 is used for construction workers to place their feet when sitting down, and construction materials can also be placed on the foot section 233. The connecting section 232 is used to connect the seat section 231 and the foot section 233. When the ladder on one side is used as a climbing ladder, the seat section 231, connecting section 232, and foot section 233 are arranged in a straight line downwards, so that the folding frame 23 does not interfere with the use of the climbing ladder, and the folding frame 23 can be folded when not in use to reduce the space occupied.

[0050] During use, the folding frame 23 at the upper end of the ladder frame 1 is folded sequentially, and the seat section 231, connecting section 232 and step section 233 are perpendicular to each other in a predetermined shape. This allows construction workers to sit on the ladder when they are at the highest point of the ladder, reducing fatigue caused by standing at the height of the ladder for a long time and reducing the occurrence of dangerous situations.

[0051] In the above embodiments, the folding frame 23 can be a "Z"-shaped metal plate.

[0052] As another embodiment of the present invention, the pedal component 2 is divided into a plate frame 24 and a foot pedal 241 according to its structure. The foot pedal 241 is provided with a rotating shaft 243 and a ratchet 244 connected to each other.

[0053] The pivot 243 is circumferentially mounted on the plate frame 24 so that the foot pedal 241 can engage with the single-sided ladder in the unfolded / folded state respectively.

[0054] Specifically, such as Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, the pivot 243 is away from the middle of the side of the foot pedal 241, that is, the pivot 243 is eccentrically set, and the larger part of the deflection fan of the foot pedal 241 faces the support frame 11, while the top of the ratchet teeth on the ratchet 244 faces the support frame 11.

[0055] Furthermore, torsion springs are provided at the rotation positions of the pivot 243 and the plate frame 24. In the default state, the torsion springs keep the foot pedal 241 and the plate frame 24 horizontal, that is, the foot pedal 241 is completely embedded in the plate frame 24.

[0056] By embedding the foot pedal 241 within the frame 24 in its default state, the horizontally arranged stepping piece 2 ensures that the foot pedal 241 is on a horizontal surface when the single-sided ladder is deployed, making it easier for construction workers to step on and climb the ladder. This increases the contact area between the construction workers' feet and the foot pedal 241, thereby improving the safety of construction workers when climbing.

[0057] Secondly, when the single-sided ladder is folded into a climbing ladder, the construction worker steps on the foot pedal 241, so that the foot pedal 241 can be deflected towards the support frame 11, and the foot pedal 241 in the step piece 2 is deflected from the inclined position to the horizontal position. At the same time, the foot pedal 241 is disengaged from the plate frame 24, so that the foot pedal 241 has a larger contact surface for the construction worker's feet when the climbing ladder is working, and the climbing ladder has better safety when working.

[0058] In the above embodiments, the driving source for the rotating shaft 243 can be a motor.

[0059] As a further embodiment of the present invention, it also includes a replacement component 3, which includes a trigger 31 and an arc pawl 312 and a pull rod 315 disposed thereon. The trigger 31 is used to be sequentially assembled with the guide groove segment 32 opened on the plate frame 24, and acts on the following two workstations:

[0060] In the first station, the arc pawl 312 engages with the ratchet 244, so that the foot pedal 241 cooperates with the single-sided ladder in the combined state;

[0061] In the second station, the trigger 31 disengages from the ratchet 244, allowing the foot pedal 241 to engage with the single-sided ladder in the unfolded state.

[0062] Specifically, such as Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, a work station slot 240 is provided on the side of the plate frame 24, and a support plate 242 is fixedly installed on the connecting protrusion 20 on the plate frame 24. The work station slot 240 is located inside the support plate 242, and the ratchet 244 is located inside the work station slot 240.

[0063] Furthermore, the trigger 31 is provided with a buckle plate 310 for manually pushing and pulling the buckle plate 310 to change the position of the trigger 31. The trigger 31 is provided with a C-shaped frame 311. The arc pawl 312 slides in the groove opened on the inner side of the C-shaped frame 311. The cross-section of the arc pawl 312 is arc-shaped to adapt to the shape of the ratchet 244, increasing the number of teeth on the arc pawl 312 and the teeth on the ratchet 244 meshing. At the same time, the arc apex of the teeth on the arc pawl 312 and the teeth on the ratchet 244 face opposite directions. A first elastic element 313 is fixedly installed between the arc pawl 312 and the C-shaped frame 311. The first elastic element 313 is specifically a spring. In the default state, the first elastic element 313 keeps the arc pawl 312 at the end of the groove, that is, the arc pawl 312 away from the opening of the C-shaped frame 311. The pull rod 315 is fixedly installed at the end of the opening of the C-shaped frame 311.

[0064] Furthermore, a guide shaft 316 is fixedly installed on the C-shaped frame 311. The guide shaft 316 slides within the guide groove section 32, and a rubber damping pad is fixedly installed within the guide groove section 32 to increase the damping when the trigger 31 slides. A stop block 3161 is fixedly installed at the end of the guide shaft 316, and a second elastic element 3162 is fixedly installed on the stop block 3161. The second elastic element 3162 slides on the inner side of the plate frame 24, and the second elastic element 3162 is specifically a spring. In the default state, the second elastic element 3162 causes the C-shaped frame 311 to slide against the inner wall of the workstation slot 240.

[0065] Furthermore, the guide groove segment 32 is divided into a horizontal groove 321, a first arc groove 322, and a second arc groove 323 according to its shape. The end of the first arc groove 322 faces downward and the arc apex of the first arc groove 322 is arranged away from the rotating shaft 243. The end of the second arc groove 323 faces upward and the arc apex of the second arc groove 323 is arranged close to the rotating shaft 243. The length of the second arc groove 323 is greater than the length of the first arc groove 322.

[0066] When the C-frame 311 is in its initial position, i.e., when the guide shaft 316 is at the end of the transverse groove 321, the arc pawl 312 on the C-frame 311 engages with the ratchet 244, allowing the ratchet 244 to deflect towards the support frame 11. Simultaneously, the ratchet 244 continuously presses against the teeth on the arc pawl 312, causing the first elastic element 313 to undergo repeated deformation and recovery. Furthermore, due to the action of the reverse teeth on the pawl 312, the ratchet 244 cannot reverse, ensuring that the foot pedal 241 in the first working position... When climbing the ladder, the foot pedal 241 can deflect towards the support frame 11 and cannot be reversed. This ensures that the worker's foot only experiences unidirectional force when pressing the foot pedal 241, making it less likely for the foot pedal 241 to reverse and cause instability during climbing. Furthermore, due to the eccentric setting of the pivot 243, the front of the worker's foot exerts force on the front of the foot pedal 241 during both pressing down and lifting up, i.e., on the surface of the foot pedal 241 with a large fan-shaped deflection area, thereby improving the safety of the worker during climbing.

[0067] Secondly, the buckle plate 310 is pushed to drive the C-shaped frame 311 to slide horizontally within the work station slot 240. At this time, the guide shaft 316 slides from the transverse groove 321 to the notch of the first arc groove 322, so that the guide shaft 316 is engaged in the first arc groove 322. At this time, the arc pawl 312 and the ratchet 244 are completely disengaged, so that the rotating shaft 243, under the action of the torsion spring to restore deformation, makes the foot pedal 241 re-embedded in the plate frame 24. This enables the foot pedal 241 in the second work station state to perform the stepping work under the action of the single-sided ladder unfolding. Thus, when the single-sided ladder is working, the foot pedals 241 in the multiple stepping pieces 2 can be parallel to the horizontal plane, making it convenient for construction personnel to step on them.

[0068] In the above embodiments, the driving source of the C-shaped frame 311 can be an electric push rod, or a motor and screw to drive it, or any existing mechanism or component known to those skilled in the art.

[0069] As another embodiment of the present invention, the pull rod 315 is provided with a locking rod 36, and the foot pedal 241 is provided with a central locking groove 362;

[0070] The end of the lever 36 is engaged in the middle slot 362 to lock the foot pedal 241 in the first working position.

[0071] Specifically, such as Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the locking rod 36 is fixedly installed on the pull rod 315. The locking rod 36 slides in the hole opened on the plate frame 24. The hole is divided into a horizontal hole and an arc hole at one end according to its shape, and the end of the arc hole has a notch. A rubber damping pad is provided in the hole to increase the damping of the sliding of the trigger 31. An arc groove 361 is opened on the side of the foot pedal 241, and a middle groove 362 is opened at the top of the arc groove 361.

[0072] By slightly pushing the buckle plate 310, the locking rod 36 enters through the notch of the arc groove 361. During the slight pushing of the buckle plate 310, the arc pawl 312 will not disengage from the ratchet 244, meaning that the trigger 31 does not perform the second position operation. When the foot pedal 241 deflects, the locking rod 36 slides in the arc groove 361. When the foot pedal 241 is horizontal in the climbing ladder working state, the locking rod 36 reaches the position of the middle groove 362. Then, the buckle plate 310 is moved back so that the locking rod 36 is engaged in the middle groove 362. This achieves the locking rod 36 on the trigger 31 to lock the foot pedal 241 in the climbing ladder state, so that the foot pedal 241 in the climbing ladder state can be stably stepped on, further improving the safety of construction personnel when standing.

[0073] As a further embodiment of the present invention, a C-shaped clamp 35 is slidably disposed on the plate frame 24, and the pull rod 315 moves to hook the C-shaped clamp 35 to lock the foot pedal 241 in the second working position.

[0074] Specifically, such as Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the plate frame 24 has a hole, the C-shaped clamp 35 slides in the hole, and a rubber damping pad is provided in the hole to keep the C-shaped clamp 35 sliding slowly and steadily.

[0075] Furthermore, a lever 341 is fixedly installed at the end of the pull rod 315, and a connecting pull horizontal groove 351 and a pull arc groove 352 are provided on the C-shaped clamp 35. The pull arc groove 352 is provided with a notch and is connected to the inside of the C-shaped clamp 35.

[0076] By pushing the buckle plate 310, the C-shaped frame 311 is driven to slide horizontally into the work station slot 240. At this time, the guide shaft 316 slides from the horizontal groove 321 to the notch of the first arc groove 322, so that the guide shaft 316 is engaged in the first arc groove 322. At this time, the arc pawl 312 and the ratchet 244 are completely disengaged. At the same time, the end of the pull rod 315 slides the lever 341 into the pull horizontal groove 351. After reaching the end of the pull horizontal groove 351, the pull rod 315 pulls the C-shaped clamp 35 to move horizontally. With the action of the rotating shaft 243 restoring the deformation of the torsion spring, the foot pedal 241 is re-embedded in the plate frame 24, so that the C-shaped clamp 35 is engaged with the end of the foot pedal 241, thereby realizing the locking of the C-shaped clamp 35 on the foot pedal 241. This allows the foot pedal 241 to be stably pressed when the single-sided ladder is in the unfolded working state.

[0077] Secondly, when the lever 36 is in the second working state, the lever 36 is disengaged from the middle slot 362 and re-enters the arc slot 361. At the same time, under the restoring deformation of the torsion spring, the lever 36 is disengaged from the arc slot 361, so that the lever 36 does not affect the operation of the foot pedal 241.

[0078] In the above embodiments, the driving source of the C-type clamp 35 can be an electric push rod, or a motor and screw to drive it, or any existing mechanism or component known to those skilled in the art.

[0079] As another embodiment of the present invention, a push rod 314 is provided on the trigger member 31, and a ratchet ring sleeve 34 is fixedly installed on the pull rod 315.

[0080] The push rod 314 and the arc plate 33 on the plate frame 24 slide together to deflect the pull rod 315 at a predetermined angle and to engage the ratchet ring sleeve 34 with the ratchet 244.

[0081] Specifically, such as Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the push rod 314 is fixedly installed on the back of the opening of the C-shaped frame 311. The opening of the arc plate 33 is far away from the rotating shaft 243, and the push rod 314 is located below the arc apex of the arc plate 33 on the horizontal plane, so that the push rod 314 first abuts against the lower side wall of the arc plate 33. Then, in conjunction with the translation of the C-shaped frame 311, the end of the push rod 314 is subjected to downward force. While the guide shaft 316 continues to translate, the position where the push rod 314 connects with the C-shaped frame 311 is subjected to upward force, so that the C-shaped frame 311 can deflect around the guide shaft 316 as the axis. At the same time, when the guide shaft 316 reaches the port of the second arc groove 323, the C-shaped frame 311 is subjected to completely upward force, and the C-shaped frame 311 drives the pull rod 315 to deflect.

[0082] Furthermore, the push rod 314 has a concave hole, which allows it to slide against the arc groove 330 on the side wall of the arc plate 33. This allows the push rod 314 to have a larger contact area with the arc groove 330 when tilted, thereby improving the stability of the C-shaped frame 311 when it deflects. The arc groove 330 is divided into a front helical section 331, a horizontal section 332, and a rear helical section 333 according to its shape. The helical direction of the front helical section 331 is away from the plate frame 24, and the helical direction of the rear helical section 333 is towards the plate frame 24, so that the front helical section 331, the horizontal section 332, and the rear helical section 333 form an inverted triangle. The horizontal section 332 has a notch to communicate with the upper end of the arc plate 33.

[0083] Furthermore, the teeth inside the ratchet ring sleeve 34 and the teeth of the ratchet wheel 244 face opposite directions, so that the ratchet ring sleeve 34 can restrict the rotation of the ratchet wheel 244, while the ratchet wheel 244 located between the work station slot 240 and the support plate 242 has enough space for the ratchet ring sleeve 34 to snap into place.

[0084] By continuing to push the buckle plate 310, the guide shaft 316 on the C-shaped frame 311 is disengaged from the first arc groove 322 and slides again into the transverse groove 321. Then, the guide shaft 316 slides into the second arc groove 323, causing the push rod 314 on the C-shaped frame 311 to slide against the side wall of the arc plate 33. This causes the C-shaped frame 311 to deflect the pull rod 315 by 135°. At the same time, the push rod 314 slides into the front spiral section 331, causing the C-shaped frame 311 to temporarily move away from the plate frame 24. At this time, the guide shaft 316 is appropriately pulled out of the second arc groove 323, and the second elastic element 3162 is compressed and deformed. At this time, the pull rod 315 and the mutually perpendicular folding frame 23 form a triangular state, and the ratchet ring 34 on the pull rod 315 is also appropriately moved away from the ratchet 244 on the previous folding frame 23. When the push rod 31... When the front spiral section 331 and the horizontal section 332 are connected, the ratchet ring sleeve 34 and the ratchet 244 on the previous foot pedal 241 are arranged coaxially. At this time, the second elastic element 3162 restores its deformation so that the push rod 314 slides in the horizontal section 332. Along with the ratchet ring sleeve 34 being fitted onto the ratchet 244 on the previous foot pedal 241, the two vertically arranged foot pedals 2 can be triangularly connected under the action of the pull rod 315 and locked under the action of the ratchet ring sleeve 34. This allows the seat section 231, connecting section 232 and foot pedal 233 on the folding frame 23 to work stably. The seat section 231 can be stably used for construction workers to sit down, the foot pedal 233 can be stably used for construction workers to place their feet and construction materials when sitting down, and the connecting section 232 can be stably used to connect the seat section 231 and the foot pedal 233.

[0085] Secondly, when the pull rod 315 deflects, the lever 341 on the pull rod 315 disengages from the lever groove 352, thus not affecting the locking operation of the C-type clamp on the foot pedal 241; at the same time, the locking lever 36 disengages from the arc hole notch on the plate frame 24, preventing the locking lever 36 from interfering with the deflection of the pull rod 315.

[0086] In the above embodiments, the driving source for the deflection of the tie rod 315 can be a motor.

[0087] As another embodiment of the present invention, it also includes a fastening component 4, which includes a triangular block 41 disposed on the trigger 31 and a ratchet sleeve 42 movably disposed on the plate frame 24.

[0088] The trigger 31 drives the triangular block 41 to abut against the ratchet sleeve 42, so that the ratchet sleeve 42 and the ratchet 244 are engaged.

[0089] Specifically, such as Figure 7 , Figure 8 and Figure 9As shown, symmetrically arranged connecting rods 411 are fixedly installed on the buckle plate 310, and the ratchet sleeve 42 is located between the two connecting rods 411. The end of the ratchet sleeve 42 is provided with an inclined surface, and the inclined surface abuts and cooperates with the inclined surface on the triangular block 41. The multiple teeth fixedly installed in the ratchet sleeve 42 and the teeth arc tops of the ratchet 244 face opposite directions.

[0090] Furthermore, the ratchet sleeve 42 slides on the support plate 242, and a retaining ring 421 is fixedly sleeved on the ratchet sleeve 42. A third elastic element 422 is fixedly installed between the retaining ring 421 and the support plate 242. The third elastic element 422 is specifically a tension spring, so that the third elastic element 422 keeps the ratchet sleeve 42 away from the ratchet 244 in the default state.

[0091] By continuing to push the buckle plate 310 to disengage the guide shaft 316 on the C-shaped frame 311 from the first arc groove 322 and slide it again into the transverse groove 321, and then slide the guide shaft 316 into the second arc groove 323, the buckle plate 310, under the action of the connecting rod 411, pulls the triangular block 41 closer to the ratchet sleeve 42, so that the inclined surface on the triangular block 41 abuts against the inclined surface on the ratchet sleeve 42, so that the ratchet sleeve 42 approaches the ratchet 244 for insertion. At the same time, the third elastic element 422 deforms, so that the ratchet sleeve 42 locks the ratchet 244 after it has deflected and lost connection, and additionally provides locking work for the foot pedal 241, so that when the folding frame 23 is bending, the foot pedal 241 on the foot pedal 2 can maintain stable pressing work, increasing the safety of the folding frame 23 when it is in the seat position.

[0092] In the above embodiments, the driving source of the ratchet sleeve 42 can be an electric push rod, or a motor and screw to drive it, or any existing mechanism or component known to those skilled in the art.

[0093] As another embodiment of the present invention, a vertical locking post 43 is fixedly installed on the triangular block 41, and a horizontal locking rod 44 is fixedly installed on the ratchet sleeve 42.

[0094] The vertical locking post 43 and the horizontal locking rod 44 cooperate to lock the trigger element 31 in a cross shape.

[0095] Specifically, such as Figure 7 , Figure 8 and Figure 9 As shown, the vertical locking post 43 is located at the bottom corner of the inclined surface of the triangular block 41, and the horizontal locking rod 44 is located at the pointed tip of the inclined surface of the ratchet sleeve 42; a first rod groove 431 is provided at the top corner of the inclined surface of the triangular block 41, and a second rod groove 441 is provided at the lower part of the inclined surface of the ratchet sleeve 42.

[0096] The buckle plate 310, under the action of the connecting rod 411, pulls the triangular block 41 closer to the ratchet sleeve 42, so that the inclined surface on the triangular block 41 abuts against the inclined surface on the ratchet sleeve 42. After the ratchet sleeve 42 is inserted close to the ratchet 244, the vertical locking post 43 on the triangular block 41 is engaged in the second rod groove 441, and the horizontal locking rod 44 on the ratchet sleeve 42 is engaged in the first rod groove 431. This makes the vertical locking post 43 and the horizontal locking rod 44 form a cross shape in the vertical direction, which is used to lock the trigger 31. After the pull rod 315 on the trigger 31 completes the triangular connection of the folding frame 23, it can perform a stable locking operation, which further increases the safety of the folding frame 23 when it is in the seat position.

[0097] Secondly, under the action of the elastic potential energy of the third elastic element 422, the ratchet sleeve 42 can provide a stable lock for the trigger 31. When unlocking, the ratchet sleeve 42 is pulled forcefully to restore the deformation of the third elastic element 422 and enable the trigger 31 to end the locking work. This allows the trigger 31 to move back so that the push rod 314 on the C-shaped frame 311 slides into the rear helical section 333 and the C-shaped frame 311 returns to its original position.

[0098] As another embodiment of the present invention, a locking rod 45 is fixedly installed on the horizontal locking rod 44, and a pin 451 is movably provided on the folding frame 23;

[0099] The locking rod 45 abuts against the push rod 451 to lock the folding frame 23.

[0100] Specifically, such as Figure 4 and Figure 5 As shown, the locking rod 45 and the horizontal locking rod 44 are arranged in a "T" shape, and both ends of the locking rod 45 are provided with a trapezoidal bevel. The end of the pin 451 is also provided with a bevel. A ring is fixedly sleeved on the pin 451, and the pin 451 slides in the channel opened on the folding frame 23. A spring is fixedly installed between the channel and the ring. A pin hole 452 is opened on the folding frame 23, and the pin 451 and the pin hole 452 are inserted and matched.

[0101] Under the action of the connecting rod 411, the buckle plate 310 pulls the triangular block 41 closer to the ratchet sleeve 42, so that the inclined surface on the triangular block 41 abuts against the inclined surface on the ratchet sleeve 42, so that the ratchet sleeve 42 is inserted into the ratchet 244. At this time, the horizontal locking rod 44 pulls the locking rod 45 closer to the folding frame 23, so that the trapezoidal inclined surfaces on both sides of the locking rod 45 abut against the inclined surface on the pin 451, and the two pins 451 move away from each other. At the same time, the spring deforms, so that the other end of the pin 451 is inserted into the pin hole 452 on another folding frame 23. Thus, after the pull rod 315 on the trigger 31 completes the triangular connection to the folding frame 23, it can perform a stable locking operation. At the same time, the pin 451 additionally increases the safety of the folding frame 23 during operation through the fastening effect between the vertically distributed folding frames 23.

[0102] In the above embodiments, the driving source of the pin 451 can be a hydraulic rod, or a motor in conjunction with a screw to drive it, or any existing mechanism or component known to those skilled in the art.

[0103] Working principle: By placing the foot pedal 2 at an angle and allowing the connecting protrusion 20 to slide into the vertical slot 21 on the ladder frame 1, and then engaging the connecting protrusion 20 into the high-position hole 221 in the higher arc slot 22, the misaligned foot pedal 2 brings the two ladder frames 1 closer together, and the ladder frames 1, together with the connecting rod 10, form a parallelogram shape. Then, the connecting protrusion 20 on the support frame 11 is deflected around the arc slot 22, so that the support frame 11 abuts against the ladder frame 1, realizing the folding of the two ladder frames 1 together with the support frame 11 to form a three-bar support, thereby enabling the single-sided ladder to be folded into a climbing ladder, allowing the single-sided ladder to be used directly in a small working environment.

[0104] Secondly, when the C-shaped frame 311 is in its initial position, i.e., when the guide shaft 316 is at the end of the transverse groove 321, the arc pawl 312 on the C-shaped frame 311 is engaged with the ratchet 244, allowing the ratchet 244 to deflect towards the support frame 11. Simultaneously, the ratchet 244 continuously presses against the teeth on the arc pawl 312, causing the first elastic element 313 to repeatedly deform and recover its deformation. Furthermore, due to the reverse teeth on the pawl 312, the ratchet 244 cannot reverse direction. This ensures that when the foot pedal 241 in the first position is used for climbing the ladder, it deflects towards the support frame 11 and cannot reverse. This means that the worker's foot experiences only unidirectional force when pressing the foot pedal 241, making it less likely for the foot pedal 241 to reverse and cause instability during climbing. Additionally, the eccentric setting of the rotating shaft 243 ensures that the worker's foot is protected during the ladder climbing process. During the pressing and lifting processes, the front part of the foot pedal 241 is subjected to force, that is, on the plate surface with a large fan-shaped deflection area of ​​the foot pedal 241. The buckle plate 310 is slightly pushed to allow the locking rod 36 to enter through the notch of the arc groove 361. During the slight pushing of the buckle plate 310, the arc pawl 312 will not disengage from the ratchet 244, that is, the trigger 31 does not perform the second position operation. When the foot pedal 241 is deflected, the locking rod 36 slides in the arc groove 361. When the foot pedal 241 is horizontal in the climbing ladder working state, the locking rod 36 reaches the position of the middle groove 362. Then the buckle plate 310 is moved back so that the locking rod 36 is engaged in the middle groove 362. Thus, the locking rod 36 on the trigger 31 locks the foot pedal 241 in the climbing ladder state, so that the foot pedal 241 in the climbing ladder state can be stepped on stably, which further improves the safety of the construction personnel when standing.Simultaneously, the buckle plate 310 is pushed to drive the C-shaped frame 311 to slide horizontally within the workstation slot 240. At this time, the guide shaft 316 slides from the transverse groove 321 to the notch of the first arc groove 322, so that the guide shaft 316 is engaged within the first arc groove 322. At this time, the arc pawl 312 and ratchet 244 are completely disengaged, allowing the rotating shaft 243 to re-embed the foot pedal 241 within the plate frame 24 under the restoring deformation of the torsion spring. This enables the foot pedal 241 in the second workstation state to perform the stepping action of the foot pedal 2 under the single-sided ladder unfolding action. Thus, when the single-sided ladder is in operation, the foot pedals 241 in the multiple foot pedals 2 can be parallel to the horizontal plane, making it convenient for construction personnel to step on them. The buckle plate 310 is pushed to drive the C-shaped frame 311 to slide horizontally within the workstation slot 240. At this time, the guide shaft 316 slides from the transverse groove 321 to the notch of the first arc groove 322, so that the guide shaft 316 is engaged in the first arc groove 322. At this time, the arc pawl 312 and the ratchet 244 are completely disengaged. Simultaneously, the end of the pull rod 315 slides the lever 341 into the pull transverse groove 351. After reaching the end of the pull transverse groove 351, the pull rod 315 pulls the C-shaped clamp 35 to move horizontally. At the same time, under the action of the torsion spring's restoring deformation, the foot pedal 241 is re-embedded in the plate frame 24 by the rotating shaft 243, so that the C-shaped clamp 35 engages with the end of the foot pedal 241, thereby locking the foot pedal 241 with the C-shaped clamp 35. This allows the foot pedal 241 to be stably pressed when the ladder on one side is in the unfolded working state.

[0105] Furthermore, by continuing to push the buckle plate 310, the guide shaft 316 on the C-shaped frame 311 is disengaged from the first arc groove 322 and slides again into the transverse groove 321. Then, the guide shaft 316 slides into the second arc groove 323, causing the push rod 314 on the C-shaped frame 311 to slide against the side wall of the arc plate 33. This causes the C-shaped frame 311 to drive the pull rod 315 to deflect by 135°. At the same time, the push rod 314 slides into the front spiral section 331, causing the C-shaped frame 311 to temporarily move away from the plate frame 24. At this time, the guide shaft 316 is appropriately pulled out of the second arc groove 323, and the second elastic member 3162 is compressed and deformed. At this time, the pull rod 315 and the mutually perpendicular folding frame 23 form a triangular state, and the ratchet ring 34 on the pull rod 315 is also appropriately moved away from the ratchet 244 on the previous folding frame 23. When the push rod... When 314 reaches the end of the front spiral section 331 and the horizontal section 332, the ratchet ring sleeve 34 and the ratchet 244 on the previous foot pedal 241 are arranged coaxially. At this time, the second elastic element 3162 restores its deformation so that the push rod 314 slides in the horizontal section 332. Along with the ratchet ring sleeve 34 being fitted onto the ratchet 244 on the previous foot pedal 241, the two vertically arranged foot pedals 2 can be triangularly connected under the action of the pull rod 315 and locked under the action of the ratchet ring sleeve 34. This allows the seat section 231, connecting section 232 and foot pedal 233 on the folding frame 23 to work stably. The seat section 231 can be stably used for construction workers to sit down, the foot pedal 233 can be stably used for construction workers to place their feet and construction materials when sitting down, and the connecting section 232 can be stably used to connect the seat section 231 and the foot pedal 233.

[0106] Finally, by continuing to push the buckle plate 310 to disengage the guide shaft 316 on the C-shaped frame 311 from the first arc groove 322 and slide it again into the transverse groove 321, and then slide the guide shaft 316 into the second arc groove 323, the buckle plate 310, under the action of the connecting rod 411, pulls the triangular block 41 closer to the ratchet sleeve 42, so that the inclined surface on the triangular block 41 abuts against the inclined surface on the ratchet sleeve 42, so that the ratchet sleeve 42 approaches the ratchet wheel 244 for insertion. At the same time, the third elastic element 422 deforms, so that the ratchet sleeve 42 approaches the ratchet wheel 244 for insertion. 2. Locking the ratchet 244 after it deflects and loses connection, additionally providing locking for the foot pedal 241. Under the action of the connecting rod 411, the buckle plate 310 pulls the triangular block 41 closer to the ratchet sleeve 42, so that the inclined surface on the triangular block 41 abuts against the inclined surface on the ratchet sleeve 42. After the ratchet sleeve 42 is inserted close to the ratchet 244, the vertical locking post 43 on the triangular block 41 engages in the second rod groove 441, and the horizontal locking rod 44 on the ratchet sleeve 42 engages in the first rod groove 431, thus realizing the engagement of the vertical locking post 43 and the horizontal locking rod 44. 4. The lever 315 on the trigger 31 is cross-shaped in the vertical direction and is used to lock the trigger 31. After the lever 315 on the trigger 31 completes the triangular connection of the folding frame 23, it can perform a stable locking operation, which further increases the safety of the folding frame 23 when it is in the seat position. At the same time, the buckle 310 pulls the triangular block 41 towards the ratchet sleeve 42 under the action of the connecting rod 411, so that the inclined surface on the triangular block 41 abuts against the inclined surface on the ratchet sleeve 42, so that the ratchet sleeve 42 approaches the ratchet 244 for insertion. At this time, the horizontal locking lever 44 pulls the locking rod. When component 45 moves closer to the folding frame 23, the trapezoidal inclined surfaces on both sides of the locking rod 45 abut against the inclined surface on the pin 451, and the two pins 451 move away from each other. At the same time, the spring deforms, so that the other end of the pin 451 is inserted into the pin hole 452 on the other folding frame 23. Thus, after the pull rod 315 on the trigger component 31 completes the triangular connection with the folding frame 23, it can perform a stable locking operation. At the same time, the pin 451 additionally increases the safety of the folding frame 23 during operation through the fastening effect between the vertically distributed folding frames 23.

[0107] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A single-person work assistance device for a high ladder, characterized in that, The ladder includes a single-sided ladder consisting of a ladder frame (1) and a support frame (11) and a step (2) for connecting two parallel ladder frames (1). The ladder frame (1) has a single vertical slot (21) and multiple arc slots (22) that are connected to each other. The stepping piece (2) is provided with a connecting protrusion (20), which slides in the vertical slot hole (21) and is used to parallel / misalign the assembly arc slot hole (22) to unfold / merge the single-sided ladder; The foot pedal (2) is divided into a plate frame (24) and a foot pedal (241) according to its structure. The foot pedal (241) is provided with a rotating shaft (243) and a ratchet (244) connected to each other. The pivot (243) is circumferentially rotatable on the plate frame (24) so ​​that the foot pedal (241) can be engaged with the single-sided ladder in the unfolded / folded state respectively; It also includes a replacement component (3), which includes a trigger (31) and an arc pawl (312) and a pull rod (315) provided thereon. The trigger (31) is used to assemble sequentially with the guide groove segment (32) opened on the plate frame (24) and acts on the following two workstations: In the first station, the arc pawl (312) engages with the ratchet (244), so that the foot pedal (241) engages with the single-sided ladder in the combined state; In the second station, the trigger (31) disengages from the ratchet (244), causing the foot pedal (241) to engage with the single-sided ladder in the unfolded state; The pull rod (315) is provided with a locking rod (36), and the foot pedal (241) is provided with a central locking groove (362). The end of the lever (36) is engaged in the middle slot (362) to lock the foot pedal (241) in the first working position. A C-shaped clamp (35) is slidably disposed on the plate frame (24), and the pull rod (315) moves to hook the C-shaped clamp (35) to lock the foot pedal (241) in the second working position.

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