A folding ladder cage automatic welding device and a folding ladder cage welded therein

Abstract

The present invention discloses an automatic welding device for a folding ladder cage and a folding ladder cage welded therein, comprising a bottom plate, a plurality of support rods are fixedly connected to the bottom plate, the upper ends of the plurality of support rods are fixedly connected to a rectangular frame, the inner walls of the front and rear sides of the rectangular frame are rotatably connected to conveying rollers, the upper end of the bottom plate is fixedly connected to a longitudinal plate, a pushing assembly is provided on the right side of the longitudinal plate, the pushing assembly comprises two pneumatic rods, the telescopic ends of the two pneumatic rods are fixedly connected to a push plate, and a rotating assembly is provided on the upper end of the bottom plate. Through the automatic welding device, the hanging ears and the net frame can be pressed together in the horizontal direction without manually holding the hanging ears, so that it is convenient for the staff to perform welding operations, and the symmetry of the welding positions of the two hanging ears can be ensured. At the same time, after the welding is completed, it is convenient for the staff to unload materials, thereby greatly improving the production efficiency of the protective net on the folding ladder cage.

Description

Technical Field

[0001] The invention relates to the technical field of folding ladder cages, and in particular to an automatic welding device for a folding ladder cage and a folding ladder cage welded therein. Background Art

[0002] At present, the safety ladder cage structures produced by large domestic engineering machinery manufacturers are all socket-type. Each column is independently installed on the four corners of the upper and lower frames. There are two bolts on the upper and lower frames to fasten them to the frames. The height of each column is 2 meters. During installation, an installer stands at each corner. The crane lifts each column and the workers align it with the frame casing and install it into the frame casing, and then lock it with bolts. The space available for workers to move during installation is very limited.

[0003] After searching, the Chinese invention patent with publication number CN115726604A discloses a modular foldable safety ladder cage for engineering, wherein the left column, the right column and the middle column are all hinged on the lower frame, the middle column is composed of an upper section of the middle column and a lower section of the middle column hinged together, the ends of the left longitudinal rod and the right longitudinal rod close to each other are both clamped on the upper end of the middle column, and the other ends of the left longitudinal rod and the right longitudinal rod away from each other are respectively hinged on the upper ends of the left column and the right column, the folding ladder includes an upper folding ladder and a lower folding ladder, the two are hinged together by a hinge, the lower end of the lower folding ladder is hinged on one side of the lower frame, the upper end of the upper folding ladder is detachably connected to the upper end frame, and a support rod is provided on the lower side of the folding ladder. The present invention is aimed at the deficiency of the prior art that there is a lack of a foldable safety ladder cage with fast installation speed and high safety during the installation process, and provides a modular foldable safety ladder cage for engineering;

[0004] In the manufacturing process of the above invention, since the protective net is suspended on the periphery, it is necessary to weld the hanging ears and the mesh frame of the protective net together during the production process. However, the welding between the existing hanging ears and the mesh frame is mostly done manually, and since the mesh frame is heavy, the mesh frame is generally placed horizontally during welding. Therefore, when welding the hanging ears, the staff is required to hold the hanging ears and the mesh frame tightly with one hand and perform the welding operation with the other hand, which makes the operation inconvenient. In addition, during the welding process, since the welding positions of the two hanging ears are mostly judged by the staff through their eyes, the two hanging ears will have asymmetric welding. Therefore, it is necessary to design an automatic welding device for a folding ladder cage and a welded folding ladder cage thereof to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose an automatic welding device for a folding ladder cage and a folding ladder cage welded therewith. Through the automatic welding device, the hanging ears and the mesh frame can be pressed tightly in the horizontal direction without manually holding the hanging ears, thereby facilitating the welding operation for the staff and ensuring the symmetry of the welding positions of the two hanging ears. At the same time, after the welding is completed, it is convenient for the staff to unload the materials, thereby greatly improving the production efficiency of the protective net on the folding ladder cage.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The foldable ladder cage automatic welding device and the foldable ladder cage welded therein comprise a bottom plate, wherein a plurality of support rods are fixedly connected to the bottom plate, the upper ends of the plurality of support rods are commonly fixedly connected to a rectangular frame, the inner walls of the front and rear sides of the rectangular frame are commonly rotatably connected to a conveying roller, the upper end of the bottom plate is fixedly connected to a longitudinal plate, a pushing assembly is provided on the right side of the longitudinal plate, the pushing assembly comprises two pneumatic rods, the telescopic ends of the two pneumatic rods are commonly fixedly connected to a push plate, the upper end of the bottom plate is provided with a rotating assembly, the rotating assembly comprises two first fixed plates fixedly connected to the bottom plate, the adjacent sides of the two first fixed plates are rotatably connected to a first rotating rod, the lower ends of the two first rotating rods are commonly fixedly connected to a cross plate, a second gear is provided on the first rotating rod located on the front side, a transmission rod is rotatably connected to the rear side of the first fixed plate located on the front side, the transmission rod is provided with a first gear, the telescopic end of the pneumatic rod located on the front side is fixedly connected to a connecting rod, and a rack is fixedly connected to the left side of the connecting rod.

[0008] Preferably, a positioning assembly is provided on the transverse plate, and the positioning assembly includes two push grooves arranged on the right side of the transverse plate, and the adjacent side inner walls of the two push grooves are installed with first electromagnets, and moving blocks are slidably connected in the two push grooves. The two moving blocks are elastically connected to the adjacent sides of the corresponding first electromagnets through a second spring, and two limit blocks are fixedly connected to the right side of the transverse plate.

[0009] Preferably, it also includes a limit assembly, which includes a rectangular box arranged on a first fixed plate located on the rear side, a second electromagnet is provided on the inner wall of the rear side of the rectangular box, a clamping block is slidably connected inside the rectangular box, the clamping block is elastically connected to the adjacent side of the second electromagnet through a fourth spring, a rectangular opening is provided on the first fixed plate located on the rear side, and a clamping groove is provided on the rear side of the first rotating rod located on the rear side.

[0010] Preferably, the first rotating rod located on the front side passes through the corresponding first fixed plate and is fixedly connected to a conductive rod, the first fixed plate located on the front side is provided with two conductive blocks matching with the conductive rod, a power supply is provided on the bottom plate, and the power supply, the conductive rod, the two conductive blocks, the two first electromagnets and the second electromagnet form a loop through wires.

[0011] Preferably, it also includes a welding assembly, which includes two slide grooves arranged on the bottom plate, vertical plates are slidably connected in the two slide grooves, second fixed plates are fixedly connected on opposite sides of the two vertical plates, adjacent sides of the two second fixed plates are rotatably connected with a second rotating rod, two threaded layers are provided on the second rotating rod, a driving motor is installed on the second fixed plate located on the rear side, the output shaft end of the driving motor is fixedly connected to the second rotating rod, the two vertical plates are elastically connected to the left inner walls of the corresponding slide grooves through a first spring, arc grooves are provided on the upper ends of the two vertical plates, gear rings are provided in the two arc grooves, welding rings are fixedly connected to the inner walls of the two gear rings, and laser welding heads are installed on the inner tops of the two welding rings.

[0012] Preferably, the upper ends of the two first fixed plates are commonly fixedly connected to a top plate, the lower end of the top plate is provided with two vertical rods, the lower ends of the two vertical rods are fixedly connected to a cylinder, the top plate is provided with a strip opening, the upper ends of the two vertical rods pass through the strip opening and are fixedly connected to a pushing block, the adjacent sides of the two pushing blocks are elastically connected by a third spring, the adjacent sides of the two pushing blocks are fixedly connected to a pressure rod, and a pressure sensor is provided on the pressure rod located on the front side.

[0013] Preferably, the upper end of the push plate is rotatably connected to two L-shaped plates.

[0014] The present invention further proposes a folding ladder cage, comprising a folding frame, wherein a folding ladder body is arranged inside the folding frame, hanging nets are arranged on four sides of the folding frame, and a hanging ring is arranged on the upper end of each hanging net, and the hanging ring is welded to the hanging net by the welding device in the above-mentioned manner.

[0015] The present invention has the following beneficial effects:

[0016] 1. Compared with the prior art, by setting the pushing assembly and the rotating assembly, the mesh frame can be quickly pressed against the two hanging ears during welding, so that when the subsequent staff performs welding operations, there is no need to hold the hanging ears by hand, which is convenient for the staff to perform welding operations;

[0017] 2. Compared with the prior art, the positioning assembly is arranged so that after the welding part of the hanging ears is rotated to a horizontal state, the two hanging ears will be pushed to the position between the moving block and the limiting block for limiting, so that the two hanging ears can be symmetrically installed on the screen frame;

[0018] 3. Compared with the prior art, the two threaded layers and the gear ring on the second rotating rod can move the welding ring to the left when the mesh frame is pushed, so that the welding end of the hanging ear can penetrate the welding ring and press against the mesh frame, so that the laser welding head can be aligned with the welding part, and then the ring automatic welding operation can be performed by running the driving motor;

[0019] 4. Compared with the prior art, by setting the L-shaped plate and the cylinder, after welding is completed, it is only necessary to control the relative movement of the two cylinders to contact the support of the hanging ring, and then control the pneumatic rod to contract, so that the mesh frame with the hanging ring welded can be pulled to the right, so as to facilitate the subsequent staff to unload the material.

[0020] To sum up, the present invention can, to a certain extent, make it easier to weld the hanging ears, and can ensure that the two hanging ears are symmetrically welded on one side of the mesh frame. At the same time, the welding operation can be carried out by utilizing the operation of the driving motor. It has a high degree of semi-automation and is also convenient for unloading the mesh frame after welding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an automatic welding device for a folding ladder cage and a folding ladder cage welded therein proposed by the present invention;

[0022] Figure 2 for Figure 1 Right side view;

[0023] Figure 3 for Figure 1 Left side elevation view;

[0024] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 5 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 6 It is a three-dimensional schematic diagram of a folding ladder cage.

[0027] In the figure: 1 bottom plate, 2 pneumatic rod, 3 push plate, 4 L-shaped plate, 5 support rod, 6 rectangular frame, 7 conveying roller, 8 guide plate, 9 first fixed plate, 10 second fixed plate, 11 connecting rod, 12 first spring, 13 vertical plate, 14 first rotating rod, 15 top plate, 16 driving motor, 17 second rotating rod, 18 rack, 19 transmission rod, 20 first gear, 21 second gear, 22 conductive rod, 23 conductive block, 24 longitudinal plate, 25 welding ring, 26 hanging ring, 27 gear ring, 28 first electromagnet, 29 limit block, 30 moving block, 31 second spring, 32 cylinder, 33 pushing block, 34 third spring, 35 pressure rod, 36 rectangular box, 37 second electromagnet, 38 fourth spring, 39 card block, 40 card slot, 41 horizontal plate, 42 folding frame, 43 hanging net, 44 folding ladder body. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Reference Figure 1-Figure 6 A folding ladder cage automatic welding device and a folding ladder cage welded thereon, comprising a bottom plate 1, a plurality of support rods 5 are fixedly connected to the bottom plate 1, a rectangular frame 6 is fixedly connected to the upper ends of the plurality of support rods 5, a conveying roller 7 is rotatably connected to the inner walls of the front and rear sides of the rectangular frame 6, a longitudinal plate 24 is fixedly connected to the upper end of the bottom plate 1, a pushing assembly is arranged on the right side of the longitudinal plate 24, the pushing assembly comprises two pneumatic rods 2, a push plate 3 is fixedly connected to the telescopic ends of the two pneumatic rods 2, the upper end of the push plate 3 is rotatably connected to two L-shaped plates 4, a rotating assembly is arranged at the upper end of the bottom plate 1, and the rotating assembly comprises two first fixed plates fixedly connected to the bottom plate 1 Plate 9, the adjacent sides of the two first fixed plates 9 are rotatably connected with the first rotating rods 14, the lower ends of the two first rotating rods 14 are commonly fixedly connected with the cross plate 41, the first rotating rod 14 located on the front side is provided with a second gear 21, the rear side of the first fixed plate 9 located on the front side is rotatably connected with a transmission rod 19, the transmission rod 19 is provided with a first gear 20, the telescopic end of the pneumatic rod 2 located on the front side is fixedly connected with a connecting rod 11, and the left side of the connecting rod 11 is fixedly connected with a rack 18, the rack 18 is meshed with the first gear 20 in the initial state, and when the first gear 20 is rotated ninety degrees, the rack 18 is no longer meshed with the first gear 20.

[0030] Among them, a positioning component is provided on the horizontal plate 41, and the positioning component includes two pushing grooves arranged on the right side of the horizontal plate 41. The adjacent side inner walls of the two pushing grooves are installed with first electromagnets 28. Moving blocks 30 are slidably connected in the two pushing grooves. The moving blocks 30 are made of iron material. When the first electromagnet 28 is energized, an attraction is generated on the moving blocks 30. The two moving blocks 30 are elastically connected to the adjacent sides of the corresponding first electromagnets 28 through second springs 31. Two limit blocks 29 are fixedly connected to the right side of the horizontal plate 41.

[0031] It also includes a limit assembly, which includes a rectangular box 36 arranged on the first fixed plate 9 located on the rear side, a second electromagnet 37 is provided on the inner wall of the rear side of the rectangular box 36, a clamping block 39 is slidably connected in the rectangular box 36, and the clamping block 39 is made of magnetic material. When the second electromagnet 37 is energized, a repulsive force is exerted on the clamping block 39, and the adjacent side of the clamping block 39 and the second electromagnet 37 are elastically connected through a fourth spring 38. A rectangular opening is provided on the first fixed plate 9 located on the rear side, and a clamping slot 40 is provided on the rear side of the first rotating rod 14 located on the rear side. Both the clamping block 39 and the clamping slot 40 are rectangular.

[0032] Among them, the first rotating rod 14 located on the front side passes through the corresponding first fixed plate 9 and is fixedly connected to the conductive rod 22. The first fixed plate 9 located on the front side is provided with two conductive blocks 23 that match the conductive rod 22. A power supply is provided on the bottom plate 1. The power supply, the conductive rod 22, the two conductive blocks 23, the two first electromagnets 28 and the second electromagnet 37 form a loop through wires.

[0033] The welding assembly includes two slide grooves arranged on the bottom plate 1, and the two slide grooves are slidably connected with vertical plates 13. The opposite sides of the two vertical plates 13 are fixedly connected with second fixed plates 10. The adjacent sides of the two second fixed plates 10 are rotatably connected with second rotating rods 17. The second rotating rods 17 are provided with two threaded layers. A driving motor 16 is installed on the second fixed plate 10 at the rear side. The output shaft end of the driving motor 16 is fixedly connected with the second rotating rod 17. The two vertical plates 13 and the left inner wall of the corresponding slide groove are connected by the first spring 1. 2 elastic connection, the upper ends of the two vertical plates 13 are each provided with an arc groove, the two arc grooves are each provided with a gear ring 27, the inner walls of the two gear rings 27 are each fixedly connected with a welding ring 25, the inner tops of the two welding rings 25 are each installed with a laser welding head, each time welding, the laser welding head will rotate one circle, when welding is completed, the output shaft of the drive motor 16 can be controlled to rotate in the reverse direction, so that the laser welding head is reversely rotated and reset, avoiding the situation that the wire of the electrical connection of the laser welding head is damaged by too many winding circles (the electrical connection of the laser welding head is a prior art).

[0034] Among them, the upper ends of the two first fixed plates 9 are commonly fixedly connected to the top plate 15, the lower end of the top plate 15 is provided with two vertical rods, the lower ends of the two vertical rods are fixedly connected to the cylinder 32, the top plate 15 is provided with a strip opening, the upper ends of the two vertical rods pass through the strip opening and are fixedly connected to the pushing blocks 33, the adjacent sides of the two pushing blocks 33 are elastically connected by the third spring 34, the adjacent sides of the two pushing blocks 33 are fixedly connected with the pressure rod 35, the pressure rod 35 located on the front side is provided with a pressure sensor, and a controller is provided on the bottom plate 1, the pressure sensor generates an electrical signal and transmits it to the controller, and the controller controls the contraction of the pneumatic rod 2.

[0035] The present solution also proposes a folding ladder cage, comprising a folding frame 42, a folding ladder body 44 is arranged inside the folding frame 42, hanging nets 43 are arranged on the four sides of the folding frame 42, and a hanging ring 26 is arranged at the upper end of each hanging net 43, and the hanging ring 26 is welded to the hanging net 43 by a welding device of any one of the above methods.

[0036] The functional principle of the present invention can be explained by the following operation mode: the staff puts the mesh frame on a plurality of conveying rollers 7, and then rotates the two L-shaped plates 4 so that the two L-shaped plates 4 rotate 90 degrees to the left, so that the right side of the mesh frame is located between the L-shaped plates 4 and the push plate 3 (at this time, the upper end of the L-shaped plate 4 is located at the upper end of the steel wire mesh in the mesh frame), and then the staff hangs the two hanging rings 26 on the two first rotating rods 14. At this time, due to the action of gravity, the welding end of the hanging ring 26 will be in a vertical downward state;

[0037] At this time, the two pneumatic rods 2 are started, so that the two pneumatic rods 2 are stretched, so that the push plate 3 pushes the screen frame to move to the left, and at the same time, the connecting rod 11 drives the rack 18 to move to the left. Since the rack 18 is in meshing with the first gear 20 at this time, the first gear 20 rotates. Since the first gear 20 and the second gear 21 are in meshing, the two first rotating rods 14 rotate to the right. When the rack 18 is not in meshing with the first gear 20, the two first rotating rods 14 rotate exactly ninety degrees, so that the welding end of the hanging ring 26 rotates to a horizontal state;

[0038] When the first rotating rod 14 rotates 90 degrees, the conductive rod 22 will contact the two conductive blocks 23, so that the two first electromagnets 28 and the second electromagnets 37 are energized. After the two first electromagnets 28 are energized, an attractive force will be generated on the two moving blocks 30, so that the two moving blocks 30 move relatively, and then the hanging ring 26 is squeezed between the moving block 30 and the limit block 29 (the hanging ring 26 is located on the cylinder 32). At the same time, after the second electromagnet 37 is energized, a repulsive force will be generated on the clamping block 39, so that the clamping block 39 passes through the rectangular opening to the clamping slot 40, and the first rotating rod 14 located at the rear side is limited, so as to avoid the hanging ring 26 from rotating during welding.

[0039] When the rack 18 is not meshed with the first gear 20, the pneumatic rod 2 is still stretched, thereby continuing to push the screen frame to move left, so that the screen frame and the hanging ring 26 are against each other. During the process of the screen frame moving left, the vertical plate 13 is pushed to move left, so that the welding end of the hanging ring 26 passes through the welding ring 25, so that the laser welding head is directly opposite to the welding position;

[0040] At this time, the staff can start the driving motor 16 and the two laser welding heads. The operation of the laser welding heads will generate laser to weld the hanging ring 26 and the screen frame together. At the same time, the operation of the driving motor 16 drives the second rotating rod 17 to rotate. Since the thread layer on the second rotating rod 17 is similar to the thread layer of a worm, and the teeth of the gear ring 27 are similar to the teeth of a worm gear, the two gear rings 27 drive the welding ring 25 to rotate, so as to perform an annular welding operation on the contact position of the hanging ring 26 and the screen frame.

[0041] After welding is completed, the staff can turn off the drive motor 16 and the laser welding head, and then use their fingers to push the two push blocks 33 to move relative to each other, so that the two cylinders 32 move relative to each other, so that the hanging ring 26 is separated from the cylinder 32. At the same time, when the two push blocks 33 move relative to each other, the two will contact the pressure rod 35, so that the pressure sensor generates an electrical signal transmitted to the controller, and the controller controls the two pneumatic rods 2 to contract, so that under the action of the L-shaped plate 4, the mesh frame drives the hanging ring 26 to move right, which is convenient for unloading operations.

[0042] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic welding device for a folding cage, comprising a bottom plate (1), characterized in that: A plurality of support rods (5) are fixedly connected to the bottom plate (1), the upper ends of the plurality of support rods (5) are commonly fixedly connected to a rectangular frame (6), the inner walls of the front and rear sides of the rectangular frame (6) are commonly rotatably connected to a conveying roller (7), the upper end of the bottom plate (1) is fixedly connected to a longitudinal plate (24), a pushing assembly is provided on the right side of the longitudinal plate (24), the pushing assembly comprises two pneumatic rods (2), the telescopic ends of the two pneumatic rods (2) are commonly fixedly connected to a push plate (3), the upper end of the bottom plate (1) is provided with a rotating assembly, the rotating assembly comprises two first pneumatic rods (2) fixedly connected to the bottom plate (1) A fixed plate (9), the adjacent sides of the two first fixed plates (9) are rotatably connected to the first rotating rods (14), the lower ends of the two first rotating rods (14) are commonly fixedly connected to a transverse plate (41), the first rotating rod (14) located on the front side is provided with a second gear (21), the rear side of the first fixed plate (9) located on the front side is rotatably connected to a transmission rod (19), the transmission rod (19) is provided with a first gear (20), the telescopic end of the pneumatic rod (2) located on the front side is fixedly connected to a connecting rod (11), and the left side of the connecting rod (11) is fixedly connected to a rack (18).

2. The automatic welding device for a folding ladder cage according to claim 1, characterized in that: The transverse plate (41) is provided with a positioning assembly, which includes two push grooves arranged on the right side of the transverse plate (41), the adjacent side inner walls of the two push grooves are both installed with first electromagnets (28), and the two push grooves are both slidably connected with moving blocks (30), and the two moving blocks (30) are elastically connected to the adjacent sides of the corresponding first electromagnets (28) through second springs (31), and the right side of the transverse plate (41) is fixedly connected with two limit blocks (29).

3. The automatic welding device for a folding ladder cage according to claim 2 is characterized in that: The invention also comprises a limit assembly, wherein the limit assembly comprises a rectangular box (36) arranged on a first fixed plate (9) located at the rear side, a second electromagnet (37) is arranged on the inner wall of the rear side of the rectangular box (36), a clamping block (39) is slidably connected inside the rectangular box (36), and the clamping block (39) is elastically connected to the adjacent side of the second electromagnet (37) through a fourth spring (38), a rectangular opening is arranged on the first fixed plate (9) located at the rear side, and a clamping groove (40) is arranged on the rear side of the first rotating rod (14) located at the rear side.

4. The automatic welding device for a folding ladder cage according to claim 3 is characterized in that: The first rotating rod (14) located at the front side passes through the corresponding first fixing plate (9) and is fixedly connected to a conductive rod (22); the first fixing plate (9) located at the front side is provided with two conductive blocks (23) matched with the conductive rod (22); a power supply is provided on the bottom plate (1); the power supply, the conductive rod (22), the two conductive blocks (23), the two first electromagnets (28) and the second electromagnet (37) form a loop through a wire.

5. The automatic welding device for a folding ladder cage according to claim 1, characterized in that: The invention also comprises a welding assembly, wherein the welding assembly comprises two slide grooves arranged on the bottom plate (1), the two slide grooves are slidably connected with vertical plates (13), the opposite sides of the two vertical plates (13) are fixedly connected with second fixed plates (10), the adjacent sides of the two second fixed plates (10) are rotatably connected with second rotating rods (17), the second rotating rods (17) are provided with two threaded layers, a driving motor (16) is installed on the second fixed plate (10) located at the rear side, the output shaft end of the driving motor (16) is fixedly connected with the second rotating rod (17), the two vertical plates (13) are elastically connected with the left inner wall of the corresponding slide groove through a first spring (12), the upper ends of the two vertical plates (13) are provided with arc grooves, the two arc grooves are provided with toothed rings (27), the inner walls of the two toothed rings (27) are fixedly connected with welding rings (25), and the inner tops of the two welding rings (25) are provided with laser welding heads.

6. The automatic welding device for a folding ladder cage according to claim 5, characterized in that: The upper ends of the two first fixing plates (9) are commonly fixedly connected to a top plate (15), the lower end of the top plate (15) is provided with two vertical rods, the lower ends of the two vertical rods are fixedly connected to a cylinder (32), a strip opening is provided on the top plate (15), the upper ends of the two vertical rods pass through the strip opening and are fixedly connected to a push block (33), the adjacent sides of the two push blocks (33) are elastically connected by a third spring (34), the adjacent sides of the two push blocks (33) are fixedly connected to a pressure rod (35), and a pressure sensor is provided on the pressure rod (35) located on the front side.

7. The automatic welding device for a folding ladder cage according to claim 1, characterized in that: The upper end of the push plate (3) is rotatably connected to two L-shaped plates (4).

8. A folding ladder cage, characterized in that: It comprises a folding frame (42), a folding ladder body (44) is arranged inside the folding frame (42), hanging nets (43) are arranged on four sides of the folding frame (42), a hanging ring (26) is arranged at the upper end of each hanging net (43), and the hanging ring (26) is welded to the hanging net (43) by a welding device according to any one of claims 1 to 6.

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