Safety ladder for large equipment

Abstract

A safety ladder for large equipment, comprising a fixed ladder and a rotating ladder arranged separately, the fixed ladder is fixedly arranged on one side of the large equipment, and the rotating ladder is located at the bottom of the fixed ladder, and the combination and separation of the rotating ladder and the fixed ladder can be realized through the rotation of the rotating ladder. By arranging the fixed ladder and the rotating ladder separately, in the use state, the rotating ladder is rotated to the bottom of the fixed ladder and is locked by the bolt positioning mechanism, in the non-use state, the rotating ladder can be rotated to the side close to the equipment, effectively leaving the ground space at the bottom of the ladder, without additional safety door, it can prevent non-operating personnel from climbing, and greatly improves the space utilization, avoids the long-term occupation of the ground area of the traditional integrated ladder, provides more sufficient space for material conveying, personnel walking and arrangement of other equipment, especially suitable for limited space and dense equipment working environment, optimizes the overall layout and improves the functionality of the working site.

Description

Technical Field

[0001] This utility model relates to the field of ladder equipment technology, specifically a safety ladder for large equipment. Background Technology

[0002] When using large, tall equipment, a ladder is usually installed on one side of the equipment to facilitate workers' access from the ground to the top for operation or maintenance. Most existing ladders are integrated into one unit, and to prevent non-operators from climbing, a safety door must be installed at the bottom of the ladder. Only after the safety door is opened can operators access the large equipment via the ladder. The installation of the safety door increases costs, and the integrated ladder always occupies ground space on one side of the large equipment, affecting material transportation and personnel movement to varying degrees. Utility Model Content

[0003] The purpose of this utility model is to provide a safety ladder for large equipment, which consists of a fixed ladder and a rotating ladder. The rotating ladder can be rotated to be on the same vertical plane as the fixed ladder for operators to climb. When not in use, it can also be rotated to be closer to the equipment, making room for the ground at the bottom of the ladder, thus solving the problems in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a safety ladder for large equipment, including a fixed ladder and a rotating ladder that are set separately. The rotating ladder is located at the bottom of the fixed ladder. A connecting plate is provided on one side of the fixed ladder, and a long groove is opened on the connecting plate. A guardrail is provided on the other side of the fixed ladder. A fixed folding plate is provided on one side of the rotating ladder, and a sleeve is installed on the fixed folding plate. A guide post that cooperates with the sleeve is provided on the rotating ladder. The rotating ladder can rotate relative to the fixed folding plate. A locking pin positioning mechanism is also installed between the fixed ladder and the rotating ladder. When the rotating ladder rotates to contact the fixed folding plate, the rotating ladder gives up the space at the bottom of the fixed ladder. When the rotating ladder rotates to the same vertical plane position as the fixed ladder, the pin positioning mechanism can lock the fixed ladder and the rotating ladder relative to each other. The pin positioning mechanism includes a first sleeve mounted on a fixed ladder, a guide sleeve mounted on a rotating ladder, a first pin mounted inside the guide sleeve, a through hole in the first sleeve that mates with the first pin, a first limiting groove on one side of the guide sleeve, and a second limiting groove on the other side of the guide sleeve. The length of the first limiting groove is greater than the length of the second limiting groove. A limiting post is mounted on the first pin that mates with the first and second limiting grooves. A handle is provided at one end of the first pin that extends downward through the guide sleeve. When the first pin on the rotating ladder rotates to the bottom position of the first sleeve, and the limiting post is located in the second limiting groove, the first pin is located in the first sleeve, locking the fixed ladder and the rotating ladder relative to each other. When the limiting post is located in the first limiting groove, the first pin separates from the first sleeve, and the rotating ladder can rotate relative to the fixed ladder. A manual rotating rod is installed on the rotating ladder near the guide column. The manual rotating rod can drive the rotating ladder to rotate to a position on the same vertical plane as the fixed ladder. The pin positioning mechanism includes a second pin on the rotating ladder. A vertically arranged guide rod is installed on one side of the fixed ladder. A second sleeve that can be vertically raised and lowered is installed on the guide rod. The bottom of the second sleeve has a hole that mates with the second pin. An upper pull-down lever and a lower pull-down lever are installed on the side of the second sleeve. An upper limit hanging rod is installed on the side of the fixed ladder. A lower limit plate is provided at the bottom of the guide rod. When the upper pull-down lever is on the upper limit hanging rod, the second pin separates from the second sleeve. After the upper pull-down lever rotates and separates from the upper limit hanging rod, the hole of the second sleeve can move down to mate with the second pin, locking the fixed ladder and the rotating ladder relative to each other.A steel wire rope is installed on one side of the rotating ladder, and a first and second reversing wheels, which cooperate with the steel wire rope, are installed on the side of the fixed ladder. The first reversing wheel is located below the second reversing wheel. The first reversing wheel is arranged at an angle, while the second reversing wheel is arranged vertically. A rotatable protective plate is hinged to the fixed ladder. The steel wire rope passes around the first and second reversing wheels in sequence and connects to the protective plate. When the rotating ladder rotates and separates from the fixed ladder, the steel wire rope can drive the protective plate to rotate and block the entrance position of the fixed ladder. When the rotating ladder rotates and is in the same vertical plane as the fixed ladder, the protective plate can rotate under its own weight to separate from the entrance position of the fixed ladder. Both the fixed ladder and the rotating ladder include a metal frame and a ladder frame arranged side by side, and a reinforcing plate is welded and fixed between the metal frame and the ladder frame.

[0005] The positive effects of this utility model are as follows: The safety ladder for large equipment described in this utility model includes a fixed ladder and a rotating ladder that are set separately. The fixed ladder is fixedly installed on one side of the large equipment, and the rotating ladder is located at the bottom of the fixed ladder. By rotating the rotating ladder, the rotating ladder and the fixed ladder can be combined and separated. By setting the fixed ladder and the rotating ladder separately, in the use state, the rotating ladder rotates to the bottom of the fixed ladder and is locked by a pin positioning mechanism. In the non-use state, the rotating ladder can rotate to the side closer to the equipment, effectively freeing up the ground space at the bottom of the ladder. Compared with traditional ladders, there is no need to set up an additional safety door, which can prevent unauthorized personnel from climbing. It also greatly improves the space utilization rate and avoids the long-term occupation of ground area by traditional integrated ladders. It provides more space for material transportation, personnel movement, and the arrangement of other equipment. It is especially suitable for working environments with limited space and dense equipment, optimizes the overall layout, and improves the functionality of the work site. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 yes Figure 2 The left view; Figure 4 yes Figure 2 Top view; Figure 5 This is a schematic diagram showing the state of the rotating ladder when it has rotated and separated from the fixed ladder; Figure 6 This is a schematic diagram of the installation of this utility model on the equipment; Figure 7 This is a schematic diagram of the pin positioning mechanism; Figure 8 yes Figure 7A schematic diagram showing the state in which the first insert post and the first insert sleeve of the middle structure are separated; Figure 9 This is another structural embodiment of the pin positioning mechanism; Figure 10 yes Figure 9 A schematic diagram showing the separation of the second insert post and the second sleeve in the middle structure; Figure 11 This is a schematic diagram of a structure with a protective plate installed inside a fixed ladder; Figure 12 This is a schematic diagram showing the protective plate rotating to a position separated from the entrance of the fixed ladder; Figure 13 This is a schematic diagram of the components of a spiral staircase. Detailed Implementation

[0007] The present invention describes a safety ladder for large equipment, such as... Figure 1-6 As shown, the system includes a fixed ladder 1 and a rotating ladder 2, which are separately configured. The fixed ladder 1 is fixedly installed on one side of the large equipment, and the rotating ladder 2 is located at the bottom of the fixed ladder 1. A connecting plate 3 is provided on one side of the fixed ladder 1, and an elongated groove 4 is provided on the connecting plate 3. The fixed ladder 1 can be fixedly installed on the large equipment by bolts passing through the connecting plate 3. The elongated groove 4 facilitates the adjustment of the installation height of the fixed ladder 1 on the equipment.

[0008] On the other side of the fixed ladder 1, there is a fence frame 5. The fence frame 5 forms a barrier around the outer space of the fixed ladder 1, which can prevent operators from falling while climbing.

[0009] The rotating ladder 2 is provided with a fixed folding plate 6 on one side. The fixed folding plate 6 can be fixedly installed on the support of large equipment with bolts. A sleeve 7 is installed on the fixed folding plate 6. The rotating ladder 2 is provided with a guide post 8 that cooperates with the sleeve 7. The rotating ladder 2 can rotate relative to the fixed folding plate 6, that is, the rotating ladder 2 can rotate and adjust relative to the fixed ladder 1.

[0010] A locking pin positioning mechanism is installed between the fixed ladder 1 and the rotating ladder 2. When the rotating ladder 2 rotates to contact the fixed folding plate 6, it is in the non-use state, allowing space at the bottom of the fixed ladder 1 and preventing unauthorized personnel from climbing onto the large equipment. When the rotating ladder 2 rotates to the same vertical plane as the fixed ladder 1, the pin positioning mechanism locks the fixed ladder 1 and the rotating ladder 2 relative to each other, and the ladder is in the use state, allowing personnel to ascend from the ground to the large equipment via the rotating ladder 2 and the fixed ladder 1.

[0011] The pin positioning mechanism can be an existing pin or locking pin. For example, a pin post can be set on the fixed ladder 1, and a pin hole can be opened on the rotating ladder 2. The fixed ladder 1 and the rotating ladder 2 can be locked in use by inserting the pin post into the pin hole. Workers can climb up the ladder to large equipment, and after pulling out the pin post, the lock can be released. The rotating ladder 2 rotates and separates from the fixed ladder 1, thus freeing up the bottom space of the fixed ladder 1. The safety ladder can be used on large equipment with high heights, such as gantry welding machines.

[0012] Furthermore, to facilitate the switching between the used and unused states of the fixed ladder 1 and the rotating ladder 2, such as... Figure 7 and 8 As shown, the pin positioning mechanism includes a first sleeve 9 disposed on the fixed ladder 1, a guide sleeve 10 installed on the rotating ladder 2, a first pin 11 fitted inside the guide sleeve 10, and a through hole provided inside the first sleeve 9 to cooperate with the first pin 11. When the first pin 11 is located in the through hole inside the first sleeve 9, the fixed ladder 1 and the rotating ladder 2 are in a relatively locked state of use.

[0013] The guide sleeve 10 has a first limiting groove 12 on one side and a second limiting groove 13 on the other side. The length of the first limiting groove 12 is greater than the length of the second limiting groove 13. The first insert 11 is equipped with a limiting post 14 that cooperates with the first limiting groove 12 and the second limiting groove 13. The end of the first insert 11 that extends downward through the guide sleeve 10 is provided with a handle 15.

[0014] When the first insert 11 on the rotating ladder 2 rotates to the bottom position of the first sleeve 9, and the limiting post 14 is located in the second limiting groove 13, the first insert 11, located in the first sleeve 9, locks the fixed ladder 1 and the rotating ladder 2 relative to each other. When the limiting post 14 is located in the first limiting groove 12, the first insert 11 separates from the first sleeve 9, and the rotating ladder 2 can rotate relative to the fixed ladder 1.

[0015] When using the aforementioned pin positioning mechanism, the operation required for the rotating ladder 2 to switch from the non-use state to the use state is as follows: The worker on the ground manually pulls the rotating ladder 2 to rotate until the rotating ladder 2 is at the bottom position of the fixed ladder 1. Then, push the handle 15 upward to move the first pin 11 into the first sleeve 9. At the same time, the limiting pin 14 moves upward and separates from the first limiting groove 12. Then, rotate the handle 15 to rotate the limiting pin 14 to the upper side of the second limiting groove 13. Pull the handle 15 down to move the limiting pin 14 into the second limiting groove 13. At this time, the first pin 11 is still located in the first sleeve 9, which also forms a relative lock between the first pin 11 and the first sleeve 9, locking the rotating ladder 2 and the fixed ladder 1 into the use state.

[0016] When using the above-mentioned pin positioning mechanism, when the rotating ladder 2 switches from the use state to the non-use state, simply push the handle 15 upward to separate the limiting post 14 from the second limiting groove 13, then rotate the handle 15 to rotate the limiting post 14 to the upper side of the first limiting groove 12, and finally pull the handle 15 down to allow the limiting post 14 to enter the first limiting groove 12. The first insert post 11 and the first insert sleeve 9 are unlocked, and the rotating ladder 2 can rotate and separate from the fixed ladder 1.

[0017] When operators ascend the ladder to the top of the large equipment for operation or maintenance, ground personnel may rotate the rotating ladder 2 to separate it from the fixed ladder 1 for easier walking, and then fail to reset the rotating ladder 2. At this time, the operators on the top of the large equipment cannot use the ladder to descend to the ground.

[0018] To solve the above problems and allow workers positioned above the large equipment to rotate and reset the rotating ladder 2, such as... Figure 9 and Figure 10 As shown, a manual lever 16 is installed on the rotating ladder 2 near the guide column 8. When the staff above the large equipment rotates the manual lever 16, the rotating ladder 2 can be rotated to a position on the same vertical plane as the fixed ladder 1.

[0019] To enable workers on top of large equipment to lock or release the pin positioning mechanism, the pin positioning mechanism includes a second pin 17 mounted on the rotating ladder 2, a vertically mounted guide rod 18 installed on one side of the fixed ladder 1, and a second sleeve 19 that can be vertically raised and lowered mounted on the guide rod 18. The bottom of the second sleeve 19 has a socket 20 that mates with the second pin 17. When the second pin 17 is located in the socket 20 of the second sleeve 19, the fixed ladder 1 and the rotating ladder 2 are locked in a relative, locked state.

[0020] The second sleeve 19 has an upper pull-up lever 21 and a lower pull-down lever 22 mounted on its side. The fixed ladder 1 has an upper limit rod 23 mounted on its side. The bottom of the guide rod 18 has a lower limit plate 24. When the upper pull-up lever 21 is on the upper limit rod 23, the second insert 17 is separated from the second sleeve 19. After the upper pull-up lever 21 rotates and separates from the upper limit rod 23, the insertion hole 20 of the second sleeve 19 can move down to engage with the second insert 17, locking the fixed ladder 1 and the rotating ladder 2 relative to each other.

[0021] When a worker on top of the large equipment rotates the rotating ladder 2 to the usable position, the following steps are required: First, rotate the upper manual lever 16 to rotate the rotating ladder 2 to the bottom position of the fixed ladder 1. At this time, the upper pull lever 21 is located on the upper limit hook 23, and the height position of the second sleeve 19 will not interfere with the rotation of the second pin 17 on the rotating ladder 2. Then, rotate the upper pull lever 21 to separate it from the upper limit hook 23, and lower the second sleeve 19 so that the insertion hole 20 of the second sleeve 19 fits into the second pin 17 on the rotating ladder 2. This locks the fixed ladder 1 and the rotating ladder 2, allowing the worker to descend from the top of the large equipment to the ground via the ladder.

[0022] The design of the pull-down lever 22 also facilitates the adjustment of the second sleeve 19 by ground personnel. The above-mentioned upper manual rotating lever 16, pull-down lever 22, second sleeve 19 and guide rod 18 will not interfere with the normal rotation of the rotating ladder 2.

[0023] Furthermore, when a worker is still on top of the large equipment while the rotating ladder 2 is rotated to a non-use position by ground staff, the worker still on top of the large equipment can be reminded to avoid climbing down the fixed ladder 1 directly. For example... Figure 11 and Figure 12 As shown, a steel wire rope 25 is installed on one side of the rotating ladder 2, and a first reversing wheel 26 and a second reversing wheel 27 that cooperate with the steel wire rope 25 are installed on the side of the fixed ladder 1. The first reversing wheel 26 is located below the second reversing wheel 27. The first reversing wheel 26 is arranged at an angle, and the second reversing wheel 27 is arranged vertically. A rotatable protective plate 28 is hinged on the fixed ladder 1. The steel wire rope 25 passes through the first reversing wheel 26 and the second reversing wheel 27 in sequence and connects to the protective plate 28.

[0024] When the rotating ladder 2 rotates and separates from the fixed ladder 1, the wire rope 25 can drive the protective plate 28 to rotate and block the entrance position of the fixed ladder 1. When the rotating ladder 2 rotates and is in the same vertical plane as the fixed ladder 1, the protective plate 28 can rotate under its own weight until it separates from the entrance position of the fixed ladder 1.

[0025] When the rotating ladder 2 rotates and separates from the fixed ladder 1, the rotating ladder 2 pulls the steel wire rope 25 to move. The steel wire rope 25 is in a taut state, and guided by two reversing wheels, it can drive the protective plate 28 to be vertically positioned on the fixed ladder 1, providing a clear warning to workers above the large equipment and preventing them from climbing down via the fixed ladder 1. When the rotating ladder 2 is in use at the bottom of the fixed ladder 1, the steel wire rope 25 is in a slack state. The protective plate 28 is not subject to the traction force of the steel wire rope 25 and rotates under its own weight, separating from the entrance position of the fixed ladder 1. Workers can then descend to the ground via the fixed ladder 1 and the rotating ladder 2. The installation of the protective plate 28 does not affect the normal climbing of workers, and the installation of the steel wire rope 25 does not affect the normal rotation of the rotating ladder 2.

[0026] Furthermore, both the fixed ladder 1 and the rotating ladder 2 include side-by-side metal frames 29 and ladder frames 30, with reinforcing plates 31 welded and fixed between the metal frames 29 and ladder frames 30. This structural form effectively enhances the overall strength and stability of the ladder, enabling it to withstand larger loads and ensuring that it is not easily deformed or damaged during long-term use. This extends the service life of the ladder, reduces equipment maintenance costs and replacement frequency, and provides a strong guarantee for the stable operation of large equipment.

[0027] The safety ladder for large equipment described in this utility model Compared to traditional ladders that require an additional safety door, this invention effectively prevents unauthorized personnel from climbing by using a rotating ladder 2 that separates from and engages with the fixed ladder 1. This eliminates the need for a separate safety door, reducing manufacturing costs and saving floor space when not in use. Furthermore, the ladder's rational structure, high strength, and good stability reduce repair and replacement costs due to equipment damage, further improving economic efficiency and saving production costs for businesses, thus increasing economic benefits.

[0028] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A safety ladder for large equipment, characterized in that: The system includes a fixed ladder (1) and a rotating ladder (2) that are separately configured. The rotating ladder (2) is located at the bottom of the fixed ladder (1). One side of the fixed ladder (1) is provided with a connecting plate (3) with a long slot (4) on it. The other side of the fixed ladder (1) is provided with a guardrail (5). One side of the rotating ladder (2) is provided with a fixed folding plate (6) with a sleeve (7) installed on it. The rotating ladder (2) is provided with a sleeve (7) that cooperates with the sleeve (7). The guide column (8) and the rotating ladder (2) can rotate relative to the fixed folding plate (6). A locking pin positioning mechanism is also installed between the fixed ladder (1) and the rotating ladder (2). When the rotating ladder (2) rotates to contact the fixed folding plate (6), the rotating ladder (2) makes room for the bottom of the fixed ladder (1). When the rotating ladder (2) rotates to the same vertical plane position as the fixed ladder (1), the pin positioning mechanism can lock the fixed ladder (1) and the rotating ladder (2) relative to each other.

2. The safety ladder for large equipment according to claim 1, characterized in that: The pin positioning mechanism includes a first sleeve (9) mounted on a fixed ladder (1), a guide sleeve (10) mounted on a rotating ladder (2), a first pin (11) fitted inside the guide sleeve (10), a through hole in the first sleeve (9) that mates with the first pin (11), a first limiting groove (12) on one side of the guide sleeve (10), and a second limiting groove (13) on the other side of the guide sleeve (10). The length of the first limiting groove (12) is greater than the length of the second limiting groove (13). A pin (11) that mates with the first limiting groove (12) and the second limiting groove (13) is mounted on the first pin (11). The limiting post (14) is matched with the two limiting grooves (13). The first insert (11) is provided with a handle (15) at one end of the guide sleeve (10) when it passes downward. When the first insert (11) on the rotating ladder (2) rotates to the bottom position of the first insert sleeve (9), the limiting post (14) is located in the second limiting groove (13). The first insert (11) is located in the first insert sleeve (9) and locks the fixed ladder (1) and the rotating ladder (2) relative to each other. When the limiting post (14) is located in the first limiting groove (12), the first insert (11) is separated from the first insert sleeve (9) and the rotating ladder (2) can rotate relative to the fixed ladder (1).

3. The safety ladder for large equipment according to claim 1, characterized in that: A manual rotating rod (16) is installed on the rotating ladder (2) near the guide post (8). The manual rotating rod (16) can drive the rotating ladder (2) to rotate to a position on the same vertical plane as the fixed ladder (1). The pin positioning mechanism includes a second pin (17) set on the rotating ladder (2). A vertically set guide rod (18) is installed on one side of the fixed ladder (1). A second sleeve (19) that can be vertically raised and lowered is installed on the guide rod (18). The bottom of the second sleeve (19) is provided with a socket (20) that cooperates with the second pin (17). The upper pull-down lever (21) and the lower pull-down lever (22) are installed on the side of the two insert sleeves (19). The upper limit hanging rod (23) is installed on the side of the fixed ladder (1). The bottom of the guide rod (18) is provided with a lower limit plate (24). When the upper pull-down lever (21) is on the upper limit hanging rod (23), the second insert (17) is separated from the second insert sleeve (19). After the upper pull-down lever (21) rotates and separates from the upper limit hanging rod (23), the insertion hole (20) of the second insert sleeve (19) can move down to cooperate with the second insert (17) to lock the fixed ladder (1) and the rotating ladder (2) relative to each other.

4. A safety ladder for large equipment according to claim 1, characterized in that: A steel wire rope (25) is installed on one side of the rotating ladder (2), and a first reversing wheel (26) and a second reversing wheel (27) that cooperate with the steel wire rope (25) are installed on the side of the fixed ladder (1). The first reversing wheel (26) is located below the second reversing wheel (27). The first reversing wheel (26) is arranged at an angle, and the second reversing wheel (27) is arranged vertically. A rotating protective plate (28) is hinged on the fixed ladder (1). The steel wire rope (25) passes around the first reversing wheel (26) and the second reversing wheel (27) in sequence and connects to the protective plate (28). When the rotating ladder (2) rotates and separates from the fixed ladder (1), the steel wire rope (25) can drive the protective plate (28) to rotate and block the entrance position of the fixed ladder (1). When the rotating ladder (2) rotates and is in the same vertical plane as the fixed ladder (1), the protective plate (28) can rotate under its own weight to separate from the entrance position of the fixed ladder (1).

5. A safety ladder for large equipment according to claim 1, characterized in that: Both the fixed ladder (1) and the rotating ladder (2) include a metal frame (29) and a ladder frame (30) arranged side by side, with a reinforcing plate (31) welded and fixed between the metal frame (29) and the ladder frame (30).

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