A folding ladder for monorail hoists

Abstract

The utility model relates to a folding ladder for monorail crane, including ladder upper section, ladder middle section, ladder lower section, one end of ladder upper section is hinged with monorail crane, the other end of ladder upper section is hinged with one end of ladder middle section, the other end of ladder middle section is hinged with one end of ladder lower section, the ladder bolt is fixed on the ladder upper section, the locking assembly is fixed on the monorail crane, the locking assembly is detachably fixed with the ladder bolt, the ladder of the utility model has the locking assembly, and the locking is reliable and convenient to remove, the whole ladder is convenient to operate, reduces the weight and the outline dimension of ladder, solves the problem that the driver of high roadway monorail crane gets in and out of the cab and the passenger gets on and off, simultaneously solves the problems that the conventional cab and the passenger ladder are large in size, heavy in weight and inconvenient to operate, reduces the occurrence of the accidents of bruise and injury caused by improper operation.

Description

Technical Field

[0001] This utility model relates to the field of monorail hoisting technology, specifically to a folding ladder used in monorail hoists. Background Technology

[0002] The mining monorail auxiliary transportation system is used for transporting equipment, personnel, and materials in underground coal mines. The locomotive has a driver's cab at both the front and rear ends. When transporting personnel, the locomotive also needs to suspend one or more personnel cars.

[0003] Coal mine transport roadways are 3.5–4.5 meters high, and the monorail crane cab and personnel carrier are 1.5–2.5 meters above the ground. Special facilities are required for personnel to get in and out of the cab and personnel carrier. When personnel are getting on and off at fixed points, a dedicated platform is usually erected. When personnel are getting on and off at non-fixed locations, a dedicated ladder is needed for the cab and personnel carrier. Existing ladder structures are similar to the utility model with announcement number CN217681549U: A folding ladder for monorail crane cabs.

[0004] Currently, most cab ladders are of fixed length and cannot be adjusted in height, limiting their applicability to different roadway heights. They are also heavy, making them inconvenient to lift and place. Furthermore, they lack buffer mechanisms or labor-saving devices, making single-person operation difficult.

[0005] Furthermore, the ladder requires two consecutive actions of pushing, pulling, and rotating when it is being raised or lowered. If the operator is not skilled or operates it improperly, it is easy to lose control and pinch fingers, causing injury accidents. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by providing a lightweight, adjustable-length folding ladder with a buffer-type, labor-saving structure for monorail hoists, simplifying the necessary actions of ladder deployment and retrieval. The ladder includes a locking mechanism that ensures reliable locking and easy disengagement.

[0007] This utility model is achieved through the following technical solution: a folding ladder for a monorail crane, comprising an upper section, a middle section, and a lower section. One end of the upper section is hinged to the monorail crane, the other end of the upper section is hinged to one end of the middle section, and the other end of the middle section is hinged to one end of the lower section. A ladder pin is fixedly connected to the upper section, and a locking assembly is fixedly connected to the monorail crane. The locking assembly is detachably fixed to the ladder pin. In this solution, the upper, middle, and lower sections of the ladder are hinged sequentially, thus achieving a three-fold fold when folded. After folding, the ladder is secured to the monorail crane cab or personnel carrier by the connection between the locking assembly and the ladder pin.

[0008] As an optimization, a gas spring is connected between the upper section of the ladder and the monorail. This applies a counterforce to counteract the downward force of gravity when the upper section of the ladder is released, preventing the ladder from falling uncontrollably and rapidly.

[0009] As an optimization, a lower gas spring connects the middle section and the lower section of the ladder. In this design, the lower gas spring ensures that the middle and lower sections of the ladder remain in contact, and overcomes the spring force when the lower section needs to be unfolded.

[0010] As an optimization, the locking assembly includes a locking seat fixed to the monorail, the locking seat having a pin hole for inserting a ladder pin, and a locking pin that slides radially from the side of the pin hole. The outer circumference of the ladder pin has an annular groove that matches the locking pin. In this design, the locking pin, when inserted into the annular groove, can secure the ladder pin.

[0011] As an optimization, the locking assembly also includes a spring that pushes the locking pin into the annular groove and a pull rope connected to the locking pin. In this design, the spring pushes the locking pin into the annular groove to achieve a locking effect and prevent it from coming out. When release is needed, the pull rope is pulled to unlock the pin.

[0012] As an optimization, a spring cap is threaded onto the locking seat and located on the side of the pin hole. The outer ring of the locking pin has an annular protrusion, and the spring is sleeved on the locking pin and located between the annular protrusion and the spring cap. In this design, the spring cap is used to fix the spring.

[0013] As an optimization, the front end of the ladder pin is conical. In this design, the front end of the ladder pin is set to be conical, which can compress the locking pin to move outward when the ladder pin is inserted into the pin hole.

[0014] As an optimization, the upper section and the middle section of the ladder are hinged together by a middle section pivot, which is located on the same side of both sections. This achieves effective fitting between the upper and middle sections of the ladder.

[0015] As an optimization, the middle section and the lower section of the ladder are hinged together by a lower section pivot, which is located on the same side of both sections, while the middle section pivot and the lower section pivot are located on opposite sides of the middle section. This achieves effective fitting between the middle and lower sections, and allows the upper and lower sections to fit together on opposite sides of the middle section, creating a three-fold effect.

[0016] The beneficial effects of this utility model are as follows: The folding ladder for monorail cranes of this utility model is easy to operate, reduces the weight and size of the ladder, solves the problem of monorail crane operators entering and exiting the cab and passengers getting on and off in high lanes, and solves the problems of conventional cabs and ladders being large, heavy and inconvenient to operate, reducing the occurrence of squeezing and collision accidents caused by improper operation. Attached Figure Description

[0017] Figure 1This is a schematic diagram showing the ladder in its retracted state during use. Figure 2 This is a schematic diagram illustrating the usage state of the ladder during its unfolding process. Figure 3 This is a schematic diagram showing the ladder in its unfolded state. Figure 4 This is a schematic diagram showing the lower section of the ladder in its unfolded state during use. Figure 5 This is a structural schematic diagram of the ladder in its unfolded state according to this utility model; Figure 6 This is a structural diagram of the ladder in its retracted state. Figure 7 This is a schematic diagram of the locking assembly of this utility model; Figure 8 This is a cross-sectional view of the locking assembly of this utility model; As shown in the figure: 1. Monorail hoist; 2. Locking assembly; 21. Locking seat; 22. Locking pin; 23. Pull rope; 24. Spring; 25. Spring cover; 3. Upper section of ladder; 4. Middle section of ladder; 5. Lower section of ladder; 6. Gas spring; 7. Lower section gas spring; 8. Ladder pin; 9. Upper section pivot; 10. Middle section pivot; 11. Lower section pivot. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0019] like Figures 1-8 As shown, this utility model discloses a folding ladder for a monorail crane, comprising an upper section 3, a middle section 4, and a lower section 5. The upper section 3 is connected to the bottom of the exit of the monorail crane's cab or personnel carrier. In this embodiment, the monorail crane 1 specifically refers to the monorail crane's cab or personnel carrier.

[0020] In this embodiment, the upper section 3, middle section 4, and lower section 5 of the ladder are all structures composed of side beams and crossbeams on both sides, and have the same width.

[0021] One end of the upper section 3 of the ladder is hinged to the monorail 1 via an upper section pivot 9, and the other end of the upper section 3 is hinged to one end of the middle section 4 via a middle section pivot 10. The middle section pivot 10 is located on the same side of the upper section 3 and the middle section 4. In this embodiment, the upper section 3 and the middle section 4 are in a vertical state when unfolded. The middle section pivot 10 is located behind the upper section 3 and the middle section 4, which refers to the side away from people going up and down. This allows the upper section 3 to swing up and down to unfold, while the middle section 4 remains vertical under the action of gravity, thus unfolding or retracting naturally.

[0022] The other end of the middle section 4 of the ladder is hinged to one end of the lower section 5 of the ladder via a lower section pivot 11. The lower section pivot 11 is located on the same side of the middle section 4 and the lower section 5, while the middle section pivot 10 and the lower section pivot 11 are located on opposite sides of the middle section 4. This achieves effective fitting between the middle and lower sections of the ladder, and also allows the upper and lower sections of the ladder to fit together on opposite sides of the middle section, creating a three-fold effect.

[0023] A retractable gas spring 6 connects the upper section 3 of the ladder and the monorail 1. The retractable gas spring 6 is a retractable gas spring. By using the tension of the retractable gas spring 6, the lifting force can be reduced during retraction and expansion, and it also has a buffering effect to prevent uncontrolled rapid fall that could injure people.

[0024] A lower gas spring 7 connects the middle section 4 and the lower section 5 of the ladder. The lower gas spring 7 is a retractable gas spring, used to keep the middle section and the lower section of the ladder always in contact. When it is necessary to unfold the lower section of the ladder, it overcomes the elastic force of the lower gas spring.

[0025] A ladder pin 8 is fixedly connected to the upper section 3 of the ladder. The ladder pin 8 is welded to the side of the upper section 3 closest to the monorail when the ladder is in the retracted state, and is perpendicular to the plane of the upper section 3. A locking component 2 is fixedly connected to the monorail 1. The locking component 2 is detachably fixed to the ladder pin 8. When the ladder is retracted, the locking component 2 is fixed to the ladder pin; when the ladder is extended, the locking component 2 is separated from the ladder pin.

[0026] like Figure 7 , 8 As shown, the locking assembly 2 includes a locking seat 21 fixed to the monorail 1. The locking seat 21 has a pin hole for inserting a ladder pin 8. After the upper section 3 of the ladder is retracted to a vertical position, the ladder pin 8 is inserted into the pin hole.

[0027] The locking assembly 2 further includes a locking pin 22 that slides radially from the side of the pin hole. The outer circumference of the ladder pin 8 has an annular groove that matches the locking pin 22. The width of the annular groove is greater than or equal to the diameter of the end of the locking pin 22. The front end of the ladder pin 8 is conical.

[0028] The locking assembly 2 also includes a spring 24 that pushes the locking pin 22 into the annular groove, and a pull rope 23 connected to the locking pin 22. The pull rope 23 is connected to the outer end of the locking pin 22, and in this embodiment, the pull rope 23 is a metal chain.

[0029] To facilitate the installation of the spring 24, a spring cover 25 located on the side of the pin hole is threaded onto the locking seat 21. The outer ring of the locking pin 22 is provided with an annular protrusion. The spring 24 is sleeved on the locking pin 22 and located between the annular protrusion and the spring cover 25.

[0030] How to use this utility model: When personnel in the cab or personnel carrier need to descend to the ground, they should hold the folding ladder with one hand and pull the rope 23 of the locking component 2 with the other to release the lock. Under the influence of gravity, the ladder will rotate and fall along the upper pivot 9 towards the outside of the cab or personnel carrier. At this time, the gas spring 6, used for cushioning, applies a counterforce to counteract the downward gravity. The greater the angle of the ladder's deviation from the center of rotation, the longer the extension length of the gas spring 6, and the greater the cushioning force, which can effectively prevent the ladder from falling uncontrollably and rapidly.

[0031] The upper section 3 and the middle section 4 of the ladder are connected by a free hinge. The middle section 4 remains vertical under gravity. The middle section 4 and the lower section 5 remain close together under the tension of the lower section's gas spring 7, moving synchronously with the middle section 4. The ladder is in the middle position when extended or retracted as follows... Figure 2 As shown.

[0032] After the ladder is lowered into place, both the upper section 3 and the middle section 4 are vertical and collinear. Figure 3 As shown.

[0033] When the tunnel is high, the lower section 5 of the ladder can be manually extended. The extension is achieved slowly by the action of the lower section gas spring 7. After extension, it appears as... Figure 4 As shown.

[0034] After the personnel descend to the ground, when retrieving the ladder, first fold up the middle section 4 and the lower section 5 of the ladder, lift the middle section 4 upwards, and swing the upper section 3 of the ladder upwards to a vertical position. When the ladder pin 8 is inserted into the pin hole of the locking seat 21, the ladder pin 8 presses against the locking pin 22 to overcome the elastic force of the spring 24, and the locking pin 22 moves outwards. When the ladder pin 8 moves into place, the locking pin 22 is inserted into the annular groove on the outer ring of the ladder pin 8 under the action of the elastic force, thereby locking and fixing the ladder.

[0035] When personnel enter the cab or vehicle from the ground, the ladder can also be safely and quickly lowered and retrieved using the above operations.

[0036] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A folding ladder for monorail hoisting, characterized in that: The ladder includes an upper section (3), a middle section (4), and a lower section (5). One end of the upper section (3) is hinged to a monorail (1), the other end of the upper section (3) is hinged to one end of the middle section (4), and the other end of the middle section (4) is hinged to one end of the lower section (5). A ladder pin (8) is fixedly connected to the upper section (3), and a locking component (2) is fixedly connected to the monorail (1). The locking component (2) and the ladder pin (8) are detachably fixedly connected. The locking assembly (2) includes a locking seat (21) fixed to the monorail (1), the locking seat (21) having a pin hole for inserting a ladder pin (8), and a locking pin (22) that slides radially from the side of the pin hole, the outer ring of the ladder pin (8) having an annular groove that matches the locking pin (22).

2. A folding ladder for a monorail hoist according to claim 1, characterized in that: A gas spring (6) is connected between the upper section of the ladder (3) and the monorail (1).

3. A folding ladder for a monorail hoist according to claim 1, characterized in that: A lower gas spring (7) connects the middle section (4) and the lower section (5) of the ladder.

4. A folding ladder for a monorail hoist according to claim 1, characterized in that: The locking assembly (2) also includes a spring (24) that pushes the locking pin (22) into the annular groove and a pull rope (23) connected to the locking pin (22).

5. A folding ladder for a monorail hoist according to claim 4, characterized in that: The locking seat (21) is threaded with a spring cap (25) located on the side of the pin hole. The outer ring of the locking pin (22) is provided with an annular protrusion. The spring (24) is sleeved on the locking pin (22) and located between the annular protrusion and the spring cap (25).

6. A folding ladder for a monorail hoist according to claim 1, characterized in that: The front end of the ladder pin (8) is conical.

7. A folding ladder for a monorail hoist according to claim 1, characterized in that: The upper section (3) and the middle section (4) of the ladder are hinged together by a middle section pivot (10), which is located on the same side of the upper section (3) and the middle section (4).

8. A folding ladder for a monorail hoist according to claim 7, characterized in that: The middle section (4) and the lower section (5) of the ladder are hinged by a lower section pivot (11), which is located on the same side of the middle section (4) and the lower section (5), and the middle section pivot (10) and the lower section pivot (11) are located on opposite sides of the middle section (4).

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