Movable high-altitude maintenance ladder stand mechanism for automatic stereoscopic warehouse roadway

Abstract

The utility model discloses a movable high-altitude maintenance crawling ladder mechanism for an automatic stereoscopic warehouse roadway, and solves the problem of how to develop a maintenance crawling ladder which is convenient to move, safe and reliable. A pair of trolley longitudinal beam upper through holes (17) are formed in a trolley longitudinal beam (10) of the aerial walking trolley (5); a pair of step cross beam upper through holes (19) is formed in a step cross beam (18) at the uppermost end of the crawling ladder (11); a step cross beam (18) at the uppermost end of the crawling ladder (11) is movably connected with a trolley longitudinal beam (10) of the aerial walking trolley (5) through the lower ends of a pair of hanging bolts (20); a top L-shaped hanging bracket (14) and a top longitudinal rack (15) are fixedly arranged on the top end cross beam (3), an upper inverted-L-shaped hanging bracket (6) is connected to the upper end of the crawling ladder (11), a crawling ladder top positioning rack (16) is fixedly arranged on the bottom end face of a horizontal beam of the upper inverted-L-shaped hanging bracket (6), and stability of the crawling ladder is achieved.

Description

Technical Field

[0001] This invention relates to an automated storage and retrieval system (AS / RS), and more particularly to a mobile high-altitude maintenance ladder for the aisle of an AS / RS. Background Technology

[0002] In recent years, with the urgent need for efficient utilization of warehousing space in the logistics industry, large-scale automated warehouses (AS / RS) have been growing rapidly. These AS / RS feature stacker crane aisles with grid-like racks on both sides, reaching heights of tens of meters. During operation and maintenance, personnel frequently need to access these high-altitude racks to maintain equipment at higher locations. To meet these maintenance requirements, current technologies typically employ fixed or movable maintenance ladders within the aisles. However, due to the narrow aisle space and the need to accommodate stacker crane movement, fixed ladders require considerable space, limiting their use in AS / RS. Movable ladders present challenges in relocation and positioning, require two operators, and pose safety hazards. Therefore, developing a convenient, movable, and reliable maintenance ladder to adapt to the daily maintenance of large AS / RS has become a pressing issue requiring on-site solutions. Summary of the Invention

[0003] This invention provides a mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems, solving the technical problem of how to develop a convenient, mobile, safe, and reliable maintenance ladder.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of this invention is as follows: A longitudinal moving track for a ladder is installed on the top surface of the aisle between shelves, along the direction of the aisle. An overhead trolley is suspended on the longitudinal moving track of the ladder. A pair of through holes are provided vertically on the horizontal suspension beam of the overhead trolley. A pair of corresponding through holes are provided on the uppermost step beam of the ladder. The lower ends of a pair of suspension bolts pass through the through holes on the trolley's longitudinal beam, the through holes on the step beam, and the compression spring in a downward direction, and are then screwed together with nuts, thus movably connecting the upper end of the ladder to the suspension beam of the overhead trolley. This achieves vertical suspension of the ladder below the overhead trolley. An inverted L-shaped hanger is provided at the upper end of the ladder. An L-shaped hanger is installed on the top beam on one side of the overhead rail, and a top longitudinal rack is installed on the top L-shaped hanger. A top positioning rack for the ladder is installed at the top of the upper inverted L-shaped hanger. When no one is climbing the ladder, the top longitudinal rack separates from the top positioning rack, allowing the ladder to move freely along the tunnel under the action of the overhead trolley. When maintenance personnel climb the ladder, the ladder compresses the spring downward under the weight of the personnel, causing the ladder to move down and the top positioning rack to engage with the top longitudinal rack, thus achieving the fixed positioning of the ladder. A bottom positioning rack is also installed at the bottom of the ladder, and a ground longitudinal rack is installed on the tunnel floor. The two work together to achieve the fixed positioning of the bottom of the ladder.

[0006] A mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles includes a stacker crane travel aisle and a ladder installed between adjacent racks in the AS / RS. Top crossbeams are fixedly installed at intervals on the top surface of the stacker crane travel aisle. A longitudinal moving rail for the ladder is fixedly connected between each top crossbeam. An aerial trolley is suspended on the longitudinal moving rail. A pair of through holes are provided on the longitudinal beam of the aerial trolley along the vertical direction. A pair of through holes are provided on the step crossbeam at the top of the ladder. The pair of through holes on the trolley longitudinal beam and the pair of through holes on the step crossbeam are vertically corresponding. The lower end of the lifting bolt passes through a pair of through holes on the trolley longitudinal beams, a pair of through holes on the step beams, and a spring in a top-to-bottom direction, and is then screwed together with a nut, thus movably connecting the uppermost step beam of the ladder to the trolley longitudinal beam of the overhead trolley. A top L-shaped hanger is fixedly installed on the top beam of the longitudinal moving track on one side of the ladder. A top longitudinal rack is fixedly installed on the top surface of the horizontal beam of the top L-shaped hanger. An upper inverted L-shaped hanger is connected to the upper end of the ladder. A top positioning rack is fixedly installed on the bottom surface of the horizontal beam of the upper inverted L-shaped hanger. The top positioning rack is positioned directly above the top longitudinal rack.

[0007] On the ground of the stacker crane travel aisle directly below the longitudinal moving track of the ladder, a longitudinal U-shaped groove limiting ground rail is fixedly installed. The lower end of the ladder is movably installed in the U-shaped groove of the longitudinal U-shaped groove limiting ground rail. A lower L-shaped hanger is connected to the lower end of the ladder. A bottom positioning rack of the ladder is installed on the bottom surface of the horizontal beam of the lower L-shaped hanger. A ground longitudinal rack is fixedly installed on the ground of the stacker crane travel aisle directly below the bottom positioning rack of the ladder.

[0008] A bottom anti-detachment limiting strip is connected to the bottom of the ladder, and the bottom anti-detachment limiting strip is movably set in the U-shaped groove of the longitudinal U-shaped groove limiting ground rail; a safety belt connecting ring is suspended on the longitudinal beam of the trolley.

[0009] A stationary area is set outside the rack on one side outside the stacker crane's travel aisle. A stationary area overhead rail is set at the top of the stationary area. The stationary area overhead rail and the ladder moving overhead rail are set at an obtuse angle and are connected together.

[0010] A working method for a mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles: When a stacker crane leaves the aisle and travels along the aisle, and a high-altitude storage device on an adjacent rack in the AS / RS requires maintenance, the ladder mechanism operates as follows:

[0011] The first step is to move the ladder into the stacker crane's travel aisle. Under the lifting and support of the overhead trolley, the ladder moves towards the high-altitude cargo position for pre-inspection. During the movement, the springs connect the top step beam of the ladder to the bottom surface of the trolley's longitudinal beam. At this time, the top positioning rack of the ladder is directly above the top longitudinal rack. Under the lifting of the overhead trolley, the ladder can move freely along the longitudinal track.

[0012] The second step involves the following steps: When the ladder moves to the pre-inspection high-altitude cargo position, the aerial trolley stops moving. The maintenance personnel climb the ladder, and under the downward force of their weight, the uppermost step beam compresses the spring. The spring, supported by a nut, begins to contract, causing the entire ladder to move downward. The upper inverted L-shaped hanger connected to the top of the ladder also moves downward simultaneously, causing the top positioning rack on the upper inverted L-shaped hanger to descend onto the top longitudinal rack. The top positioning rack and the top longitudinal rack mesh together, thus fixing the top of the ladder.

[0013] When maintenance personnel climb the vertically installed ladder, the lower L-shaped hanger also moves downwards along with the entire ladder. The bottom positioning rack of the ladder descends onto the longitudinal rack on the ground, and the bottom positioning rack of the ladder engages with the longitudinal rack on the ground, thus fixing the bottom of the ladder.

[0014] Maintenance personnel ascend the ladder, which is locked at both the top and bottom, to the maintenance location to perform equipment maintenance. After the maintenance is completed, the maintenance personnel descend to the bottom of the ladder and leave. As the downward weight of the human body on the ladder is released, the spring bounces upward, raising the top step beam of the ladder. At the same time, the top positioning rack of the ladder rises simultaneously, disengaging it from the top longitudinal rack. Simultaneously, the bottom positioning rack of the ladder also rises, disengaging it from the ground longitudinal rack. The ladder then moves freely to the next maintenance location under the support and lifting of the overhead trolley.

[0015] This invention places the longitudinal moving top rail of the ladder on one side of the stacker crane's top rail and the longitudinal U-shaped groove limiting ground rail on one side of the stacker crane's ground rail. These two rails do not obstruct the normal operation of the stacker crane. The vertical ladder is suspended by an overhead trolley, enabling the ladder to move freely along the aisle. A pair of lifting bolts and springs are cleverly used to connect the overhead trolley to the step beam at the top of the ladder. The weight of the person climbing the ladder is used to lock and fix the upper and lower ends of the ladder, ensuring its stability. When no maintenance work is being performed, the ladder can be pushed to the end of the rack and placed in a stationary area, without affecting the operation of equipment in the aisle, saving space and simplifying the equipment, thus reducing the manufacturing cost of the maintenance platform. When maintenance climbing is required, the ladder is manually pushed into the stacker crane's aisle, which is convenient and quick. Before climbing, maintenance personnel can connect the safety belt to the fall arrestor to prevent accidental falls and ensure personnel safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention in a side view within a tunnel;

[0018] Figure 3 This is a schematic diagram of the structure of the present invention from a top view.

[0019] Figure 4 This is a schematic diagram of the ladder of the present invention in the front view direction;

[0020] Figure 5 This is a side view schematic diagram of the ladder of the present invention;

[0021] Figure 6 yes Figure 1 A magnified structural diagram of section B in the middle;

[0022] Figure 7 yes Figure 2 A magnified structural diagram of point A in the middle when there is no one on the ladder;

[0023] Figure 8 yes Figure 2 A magnified structural diagram of point A when there are people on the ladder;

[0024] Figure 9 yes Figure 1 A magnified structural diagram of point C when there is no one on the ladder;

[0025] Figure 10 yes Figure 1 A magnified structural diagram of point C when there are people on the ladder. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings:

[0027] A mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles includes a stacker crane travel aisle 2 and a ladder 11 installed between adjacent racks 1 in the AS / RS. Top beams 3 are fixedly installed at intervals on the top surface of the stacker crane travel aisle 2. A longitudinal moving rail 4 for the ladder is fixedly connected between each top beam 3. An aerial trolley 5 is suspended on the longitudinal moving rail 4. The aerial trolley 5 consists of a trolley longitudinal beam 10 and two columns connected to the longitudinal beam. At the top of the columns… The ladder 11 is equipped with trolley wheels, which are movably connected to the longitudinal moving track 4. A pair of through holes 17 are provided on the trolley longitudinal beam 10 of the trolley 5 along the vertical direction. A pair of through holes 19 are provided on the step crossbeam 18 at the top of the ladder 11, with the trolley longitudinal beam through holes 17 and the step crossbeam through holes 19 corresponding vertically. The lower ends of a pair of lifting bolts 20 pass through a pair of small... The longitudinal beam 17, the pair of step beams 19, and the spring 22 are screwed together with the nut 21. The head of the lifting bolt 20 is engaged with the top surface of the longitudinal beam 10. The longitudinal beam 10 and the step beam 18 are movably connected on the lifting bolt between the head of the lifting bolt 20 and the nut 21. The spring 22, which is sleeved on the lower part of the lifting bolt 20, pushes the step beam 18 upward against the bottom surface of the longitudinal beam 10. The top of the ladder longitudinal moving track 4 is connected to the top of the ladder longitudinal moving track 4. A top L-shaped hanger 14 is fixedly installed on beam 3. A top longitudinal rack 15 is fixedly installed on the top surface of the horizontal beam of the top L-shaped hanger 14. An upper inverted L-shaped hanger 6 is connected to the upper end of the ladder 11. A ladder top positioning rack 16 is fixedly installed on the bottom surface of the horizontal beam of the upper inverted L-shaped hanger 6. The ladder top positioning rack 16 is located directly above the top longitudinal rack 15. The cooperation between the upper inverted L-shaped hanger 6 and the top L-shaped hanger 14 realizes the locking and fixing of the upper end of the ladder 11.

[0028] On the ground of the stacker crane travel aisle 2 directly below the longitudinal moving track 4 of the ladder, a longitudinal U-shaped groove limiting ground rail 7 is fixedly installed. The lower end of the ladder 11 is movably installed in the U-shaped groove of the longitudinal U-shaped groove limiting ground rail 7, so that the lower end of the ladder 11 will not swing. A lower L-shaped hanger 8 is connected to the lower end of the ladder 11. A bottom positioning rack 24 of the ladder is installed on the bottom surface of the horizontal beam of the lower L-shaped hanger 8. A ground longitudinal rack 9 is fixedly installed on the ground of the stacker crane travel aisle 2 directly below the bottom positioning rack 24 of the ladder. The cooperation between the lower L-shaped hanger 8 and the ground longitudinal rack 9 realizes the locking and fixing of the ladder 11.

[0029] A bottom anti-detachment limiting strip 25 is connected to the bottom of the ladder 11. The bottom anti-detachment limiting strip 25 is movably set in the U-shaped groove of the longitudinal U-shaped groove limiting ground rail 7. A safety belt connecting ring 23 is suspended on the trolley longitudinal beam 10.

[0030] A stationary area 12 is provided on the outside of the rack on one side outside the stacker crane travel aisle 2. A stationary area overhead rail 13 is provided at the top of the stationary area 12. The stationary area overhead rail 13 and the ladder moving overhead rail 4 are set at an obtuse angle and are connected together. Moving the ladder to the stationary area ensures the normal operation of the stacker crane.

[0031] A working method for a mobile high-altitude maintenance ladder mechanism in an automated storage and retrieval system (AS / RS) aisle: When the stacker crane leaves the stacker crane travels through aisle 2, and a high-altitude storage device on an adjacent rack 1 in the AS / RS requires maintenance, the ladder mechanism operates as follows:

[0032] Step 1: Move ladder 11 into stacker crane travel aisle 2. Under the lifting and support of overhead trolley 5, ladder 11 moves towards the high-altitude cargo position for pre-inspection. During the movement, spring 22 pushes the uppermost step beam 18 of ladder 11 against the lower bottom surface of trolley longitudinal beam 10. At this time, the top positioning rack 16 of ladder is directly above the top longitudinal rack 15. Under the lifting of overhead trolley 5, ladder 11 can move freely along the ladder longitudinal moving track 4.

[0033] The second step is to move the ladder 11 to the pre-inspection high-altitude cargo position, and the aerial trolley 5 stops moving. The maintenance personnel climb the ladder 11. Under the downward force of the maintenance personnel's weight, the uppermost step beam 18 compresses the spring 22 downward. The spring 22 begins to contract with the nut 21 as the support point, causing the entire ladder 11 to move downward. The upper inverted L-shaped hanger 6 connected to the upper end of the ladder 11 also moves downward at the same time, so that the top positioning rack 16 on the upper inverted L-shaped hanger 6 descends to the top longitudinal rack 15. The top positioning rack 16 and the top longitudinal rack 15 mesh together, which serves to fix the top of the ladder 11.

[0034] When maintenance personnel climb the vertically installed ladder 11, the lower L-shaped hanger 8 also moves downwards along with the entire ladder 11. The bottom positioning rack 24 of the ladder descends onto the longitudinal rack 9 on the ground, and the bottom positioning rack 24 of the ladder engages with the longitudinal rack 9 on the ground, thus fixing the bottom of the ladder 11.

[0035] Maintenance personnel ascend the ladder 11, which is locked at both the top and bottom, to the maintenance location to perform equipment maintenance. After the maintenance is completed, the maintenance personnel descend the ladder to the bottom and leave the ladder 11. As the downward weight of the human body on the ladder 11 is released, the spring 22 springs upward, raising the top step beam 18 of the ladder 11. At the same time, the top positioning rack 16 of the ladder rises simultaneously, disengaging the top positioning rack 16 from the top longitudinal rack 15. Simultaneously, the bottom positioning rack 24 of the ladder also rises, disengaging the bottom positioning rack 24 from the ground longitudinal rack 9. The ladder 11 then moves freely to the next maintenance location under the hoisting and support of the overhead trolley 5.

[0036] A stationary area 12 is provided on the outside of the rack on one side outside the stacker crane travel aisle 2. A stationary area ceiling rail 13 is provided at the top of the stationary area 12. The stationary area ceiling rail 13 and the ladder moving ceiling rail 4 are set at an obtuse angle so that the ladder 11 will not obstruct the normal operation of the stacker crane in the stacker crane travel aisle 2.

Claims

1. A mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles, comprising a stacker crane travel aisle (2) and a ladder (11) arranged between adjacent racks (1) of the AS / RS, wherein top crossbeams (3) are fixedly arranged at intervals on the top surface of the stacker crane travel aisle (2), and a ladder longitudinal moving rail (4) is fixedly connected between each top crossbeam (3), and an aerial trolley (5) is suspended on the ladder longitudinal moving rail (4); characterized in that, On the vertical longitudinal beam (10) of the aerial trolley (5), a pair of through holes (17) are provided along the vertical direction; on the step beam (18) at the top of the ladder (11), a pair of through holes (19) are provided, and the pair of through holes (17) on the trolley longitudinal beam and the pair of through holes (19) on the step beam are provided vertically; the lower ends of a pair of lifting bolts (20) pass through the pair of through holes (17) on the trolley longitudinal beam, the pair of through holes (19) on the step beam, and the spring (22) in the downward direction, and are then screwed together with nuts (21) to secure the ladder (11). The uppermost step beam (18) is movably connected to the trolley longitudinal beam (10) of the aerial trolley (5); a top L-shaped hanger (14) is fixedly installed on the top beam (3) on one side of the longitudinal moving track (4) of the ladder; a top longitudinal rack (15) is fixedly installed on the top surface of the horizontal beam of the top L-shaped hanger (14); an upper inverted L-shaped hanger (6) is connected to the upper end of the ladder (11); a ladder top positioning rack (16) is fixedly installed on the bottom surface of the horizontal beam of the upper inverted L-shaped hanger (6); and the ladder top positioning rack (16) is located directly above the top longitudinal rack (15).

2. The mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles according to claim 1, characterized in that, On the ground of the stacker locomotive travel aisle (2) directly below the longitudinal moving overhead rail (4) of the ladder, a longitudinal U-shaped groove limiting ground rail (7) is fixedly installed. The lower end of the ladder (11) is movably installed in the U-shaped groove of the longitudinal U-shaped groove limiting ground rail (7). A lower L-shaped hanger (8) is connected to the lower end of the ladder (11). A bottom positioning rack (24) of the ladder is installed on the bottom surface of the horizontal beam of the lower L-shaped hanger (8). A ground longitudinal rack (9) is fixedly installed on the ground of the stacker locomotive travel aisle (2) directly below the bottom positioning rack (24) of the ladder.

3. The mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles according to claim 2, characterized in that, A bottom anti-detachment limiting strip (25) is connected to the bottom of the ladder (11), and the bottom anti-detachment limiting strip (25) is movably set in the U-shaped groove of the longitudinal U-shaped groove limiting ground rail (7); a safety belt connecting ring (23) is suspended on the trolley longitudinal beam (10).

4. The mobile high-altitude maintenance ladder mechanism for automated storage and retrieval systems (AS / RS) aisles according to claim 3, characterized in that, A stationary area (12) is provided on the outside of the rack on one side outside the stacker crane travel aisle (2). A stationary area ceiling rail (13) is provided at the top of the stationary area (12). The stationary area ceiling rail (13) and the ladder moving ceiling rail (4) are set at an obtuse angle. The stationary area ceiling rail (13) and the ladder moving ceiling rail (4) are connected together.

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