An elevator car gantry beam welding apparatus

Abstract

This invention relates to the field of welding positioning technology and discloses a welding equipment for elevator car gantry beams. The equipment includes a base, an electric slide rail mounted on the base, a multi-angle welding device installed at the output end of the electric slide rail, a motor fixedly connected to the front of the base, and a reciprocating lead screw rotatably connected to the inner wall of the base. A moving rod is movably connected to the circumferential surface of the reciprocating lead screw rotatably. This invention enables the L-shaped support plate to synchronously move the components it holds, achieving automated positioning of components before welding. It allows for precise positioning of the components to be welded, improving the welding quality and accuracy of the device. The limiting plate clamps and fixes the components placed on the L-shaped support plate, preventing displacement and vibration of the components during positioning and movement. This improves the welding accuracy and quality of the component beams and avoids reduced welding accuracy due to component vibration and displacement.

Description

Technical Field

[0001] This invention relates to the field of welding positioning technology, specifically to a welding equipment for elevator car gantry beams. Background Technology

[0002] The elevator car gantry beam is a heavy metal frame structure. The movement and positioning of the workpiece before welding is the core process. The traditional method relies on manual adjustment of the workpiece posture and position with the help of tools. This not only results in high labor intensity and low positioning accuracy, but also easily causes dimensional deviations. There are also safety hazards such as workpiece collision and slippage. In addition, the poor positioning consistency leads to unstable weld quality and excessive welding deformation, making it difficult to adapt to the production of multi-specification products, thus restricting the improvement of welding efficiency and product quality.

[0003] Patent CN117139976A discloses an automatic elevator car gantry beam welding system and its usage method, including a base and a support rod installed below the base. A placement plate is installed above the base, and the diagonal ends of one end of the placement plate are sleeved on vertical screw rods, which are installed on the base. Guide holes are opened at the diagonal ends of the other end of the placement plate. The gantry beam is rotated laterally by rotating the drive sleeve, and the gantry beam is rotated vertically by rotating the turntable, effectively realizing multi-angle rotation adjustment of the gantry beam, achieving multi-angle alignment, and improving welding adaptability. The left and right clamping components, as well as the left and right pressure plates, cooperate to clamp the gantry beam on all four sides, improving clamping stability and effectively preventing the gantry beam from dislodging and falling. The position of the welder can be adjusted at multiple angles according to welding requirements, increasing welding adaptability.

[0004] However, when using the above-mentioned device, it is difficult to clamp and fix the gantry beam components in a comprehensive and synchronous manner during the welding process. At the same time, it is difficult to center the components simultaneously during the positioning process. This can easily cause the gantry beam components to shift and vibrate during the welding process, affecting the quality and efficiency of subsequent welding. Therefore, an elevator car gantry beam welding device is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an elevator car gantry beam welding device to address the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an elevator car gantry beam welding device, including a base, an electric slide rail on the base, a multi-angle welding device installed at the output end of the electric slide rail, a motor fixedly connected to the front of the base, a reciprocating lead screw rotatably connected to the inner wall of the base, a moving rod movably connected to the circumferential surface of the reciprocating lead screw rotatably, an L-shaped support plate fixedly connected to the top of the moving rod, a limit column fixedly connected to the inner wall of the base, a bracket fixedly connected to the top of the L-shaped support plate, and a moving column slidably connected to the inner wall of the L-shaped support plate. A rack is fixedly connected to the circumferential surface of the movable column, a gear is rotatably connected to the circumferential surface of the bracket, a slide rod is slidably connected to the inner wall of the bracket, a rack is fixedly connected to the inner wall of the slide rod, a limit plate is fixedly connected to the rear of the slide rod, a roller is rotatably connected to the inner wall of the movable column, and a guide plate is installed on the base, so that the L-shaped support plate can synchronously drive the parts placed on it to move, which can realize the positioning of automated parts before welding, and can accurately position the parts to be welded, thereby improving the welding quality and accuracy of the device. The limit plate can clamp and fix the parts placed on the L-shaped support plate.

[0007] Preferably, the inner wall of the L-shaped support plate is provided with a pre-treatment mechanism for cleaning dust and debris from the surface of elevator components, and the inner wall of the pre-treatment mechanism is provided with a scraping mechanism for cleaning and removing welding slag. The reciprocating screw is fixedly connected to the output end of the motor, and the moving rod is slidably connected to the circumferential surface of the limiting post. The limiting post is used to guide and limit the movement of the moving rod. The guide plate is located on the movement trajectory of the roller and is used to push the roller to rise. This can prevent the components from displacing and shaking during the positioning and movement process. At the same time, after the limiting plate fixes and limits the components, it can improve the welding accuracy and quality of the component beam by the device and avoid the subsequent reduction in welding accuracy caused by the vibration and displacement of the components.

[0008] Preferably, rack one meshes with gear, and rack one is used to drive gear to rotate. Gear meshes with rack two, and gear is used to drive rack two to move downward. L support plate will drive moving column to move. The movement of moving column will drive roller to move laterally in sync. After the roller moves a certain distance, the roller will contact guide plate. At this time, the roller will drive the roller to rise in the opposite direction through its own inclined surface.

[0009] Preferably, the pretreatment mechanism includes an L-shaped rod, which is fixedly connected to the circumferential surface of the moving column. A connecting block is fixedly connected to the top of the L-shaped rod, and a pushing inclined plate is fixedly connected to the circumferential surface of the connecting block. An anti-scratch rubber plate is fixedly connected to the inner wall of the pushing inclined plate, so that the anti-scratch rubber plate will simultaneously push the accessory to center the welding area through its own inclined surface, which can improve the accuracy of the initial positioning of the accessory, improve the subsequent welding quality, and improve the welding efficiency of the device.

[0010] Preferably, the pretreatment mechanism further includes a fixed frame, which is fixedly connected to the inner wall of the L-shaped support plate. A motor is fixedly connected to the left side of the fixed frame, and a reciprocating lead screw is rotatably connected to the inner wall of the fixed frame. A moving block is movably connected to the circumferential surface of the reciprocating lead screw, and an L-shaped rod is fixedly connected to the circumferential surface of the moving block. A cleaning air nozzle is fixedly connected to the inner wall of the L-shaped rod. When the L-shaped rod moves, it will drive the cleaning air nozzle to move. At this time, the cleaning air nozzle can clean the dust and debris on the surface of the component welding area. This can perform welding pretreatment on the component before welding, avoiding the impact of dust and debris on the surface of the component on the subsequent welding process, and improving the welding effect of the device.

[0011] Preferably, the movable block is slidably connected to the inner wall of the fixed frame, and the movable block is used to drive the L-rod two to move. The reciprocating screw two is fixedly connected to the output end of the motor. During the movement of the L-support plate, the L-support plate will drive the fixed frame to move synchronously. The movement of the fixed frame will drive the motor to move. At this time, the motor will start synchronously, and the output end of the motor will drive the reciprocating screw two to rotate.

[0012] Preferably, the scraping mechanism includes a fixed column one, which is fixedly connected to the inner wall of the L-bar two. A scraper is fixedly connected to the circumferential surface of the fixed column one, so that the scraper can scrape and clean the small amount of welding slag between the parts to be welded. After welding, the completed parts can be pre-cleaned, which can reduce the subsequent cleaning cost.

[0013] Preferably, the scraping mechanism further includes an L-shaped rod three, which is fixedly connected to the circumferential surface of the L-shaped rod one. A fixed column two is fixedly connected to the top of the L-shaped rod three, and an elastic telescopic rod two is fixedly connected to the top of the L-shaped rod three. A top plate is fixedly connected to the telescopic end of the elastic telescopic rod two, and an anti-scratch rubber ring is fixedly connected to the top of the top plate. This can improve economic efficiency and enhance the welding effect of the device. The anti-scratch rubber ring will contact the bottom of the accessory and push the accessory, so that the accessory on the L-shaped support plate and the accessory placed on the base are tightly fitted, which can reduce welding gaps and directly improve the welding quality of the device.

[0014] Preferably, the top plate is in contact with the L-support plate, and the top plate is used to push the elevator accessories. The anti-scratch rubber ring is in contact with the L-support plate. The lateral upward movement of L-rod one will synchronously drive L-rod three to move upward. The upward movement of L-rod three will drive the fixed column two to move upward. At the same time, L-rod three will drive the elastic telescopic rod two to move upward. The movement of the elastic telescopic rod two will drive the top plate to move upward.

[0015] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This elevator car gantry beam welding equipment, through the coordinated movement of the base, electric slide rail, multi-angle welding equipment, motor, reciprocating lead screw one, moving rod, L-shaped support plate, pre-treatment mechanism, scraping mechanism, limiting column, bracket, moving column, rack one, gear, slide rod, rack two, limiting plate, roller, and guide plate, enables the L-shaped support plate to synchronously drive the movement of the components it holds. This achieves automated positioning of components before welding, accurately positioning the components to be welded, improving the welding quality and precision of the device. The limiting plate clamps and fixes the components placed on the L-shaped support plate, preventing displacement and vibration during positioning and movement. Furthermore, after fixing and limiting the components, the limiting plate improves the welding precision and quality of the component beam, preventing subsequent welding precision reduction due to component vibration and displacement.

[0016] 2. This elevator car gantry beam welding equipment, through the coordinated movement of L-rod one, connecting block, pushing inclined plate, anti-scratch rubber plate, fixed frame, motor, reciprocating screw two, moving block, L-rod two, and cleaning air nozzle, allows the anti-scratch rubber plate to simultaneously push the parts to center the welding area via its inclined surface. This improves the accuracy of the initial positioning of the parts, enhances the subsequent welding quality, and increases the welding efficiency of the device. The movement of L-rod two drives the cleaning air nozzle to move, which cleans dust and debris from the surface of the parts in the welding area. This pre-treatment of the parts before welding prevents dust and debris from affecting the subsequent welding accuracy, thus improving the welding effect of the device.

[0017] 3. This elevator car gantry beam welding equipment, through the coordinated movement of fixed column one, scraper, L-rod three, fixed column two, elastic telescopic rod two, top plate, and anti-scratching rubber ring, enables the scraper to scrape away and clean the small amount of welding slag between the parts to be welded. After welding, it can perform preliminary cleaning of the finished parts, reducing subsequent cleaning costs, improving economic efficiency, and enhancing the welding effect of the device. The anti-scratching rubber ring contacts the bottom of the parts and pushes the parts, making the parts on the L-support plate and the parts placed on the base fit tightly together, reducing welding gaps and directly improving the welding quality of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a half-sectional view of the base structure of the present invention; Figure 3 This is a schematic diagram of the L-shaped support plate structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure at point B in the middle; Figure 6 This is a schematic diagram of the pretreatment mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point C; Figure 8 This is a schematic diagram of the scraping mechanism of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of the structure at point D.

[0019] In the diagram: 1. Base; 2. Electric slide rail; 3. Multi-angle welding equipment; 4. Motor; 5. Reciprocating lead screw one; 6. Moving rod; 7. L-shaped support plate; 8. Pre-treatment mechanism; 9. Scraping mechanism; 10. Limiting post; 11. Bracket; 12. Moving post; 13. Rack one; 14. Gear; 15. Slide rod; 16. Rack two; 17. Limiting plate; 18. Roller; 19. Guide plate; 801. L-shaped rod one 802. Connecting block; 803. Pushing inclined plate; 804. Anti-scratch rubber plate; 805. Fixing frame; 806. Motor; 807. Reciprocating screw two; 808. Moving block; 809. L-rod two; 810. Cleaning air nozzle; 901. Fixing column one; 902. Scraper; 903. L-rod three; 904. Fixing column two; 905. Elastic telescopic rod two; 906. Top plate; 907. Anti-scratch rubber ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-9One embodiment of the present invention is as follows: an elevator car gantry beam welding device, including a base 1, an electric slide rail 2 is provided on the base 1, a multi-angle welding device 3 is installed at the output end of the electric slide rail 2, a motor 4 is fixedly connected to the front of the base 1, a reciprocating screw 5 is rotatably connected to the inner wall of the base 1, a moving rod 6 is movably connected to the circumferential surface of the reciprocating screw 5, an L-shaped support plate 7 is fixedly connected to the top of the moving rod 6, a limit column 10 is fixedly connected to the inner wall of the base 1, a bracket 11 is fixedly connected to the top of the L-shaped support plate 7, a moving column 12 is slidably connected to the inner wall of the L-shaped support plate 7, a rack 13 is fixedly connected to the circumferential surface of the moving column 12, a gear 14 is rotatably connected to the circumferential surface of the bracket 11, a slide rod 15 is slidably connected to the inner wall of the bracket 11, a rack 16 is fixedly connected to the inner wall of the slide rod 15, a limit plate 17 is fixedly connected to the rear of the slide rod 15, a roller 18 is rotatably connected to the inner wall of the moving column 12, and a guide plate 19 is installed on the base 1. Before using the device, the operator places the elevator gantry components to be welded sequentially on the welding area of ​​the base 1 and the L-support plate 7. After preparation, the motor 4 will start, and the output of the motor 4 will drive the reciprocating screw 5 to rotate. During the rotation of the reciprocating screw 5, the reciprocating screw 5 will drive the moving rod 6 to rotate. However, the moving rod 6 is limited by the movement guide of the limiting column 10. The limiting column 10 will cause the moving rod 6 to move laterally through the reciprocating groove on the surface of the reciprocating screw 5 during the rotation of the reciprocating screw 5. The movement of the moving rod 6 will drive the L-support plate 7 to move. During the movement of the L-support plate 7, the L-support plate 7 can synchronously drive the components placed on it to move, which can realize the positioning of automated components before welding, and can accurately position the components to be welded, thereby improving the welding quality and accuracy of the device. The inner wall of the L-support plate 7 is provided with a pre-treatment mechanism 8 for cleaning dust and debris from the surface of elevator parts. The inner wall of the pre-treatment mechanism 8 is provided with a scraping mechanism 9 for cleaning and removing welding slag. The reciprocating screw 5 is fixedly connected to the output end of the motor 4. The moving rod 6 is slidably connected to the circumferential surface of the limiting post 10, and the limiting post 10 is used to guide and limit the movement of the moving rod 6. The guide plate 19 is located on the movement trajectory of the roller 18, and the guide plate 19 is used to push the roller 18 to rise. The rack 13 meshes with the gear 14, and the rack 13 is used to push the gear 14 to rotate. The gear 14 meshes with the rack 2 16, and the gear 14 is used to drive the rack 2 16 to move downward. When the device is in use, as the L-support plate 7 moves, it drives the moving column 12 to move as well. The movement of the moving column 12 causes the roller 18 to move laterally in sync. After moving a certain distance, the roller 18 contacts the guide plate 19. At this point, the roller 18, through its inclined surface, is driven upwards. During this upward movement, the roller 18 simultaneously drives the moving column 12 to rise. The moving column 12 then slides upwards along the inner wall of the L-support plate 7. The upward movement of the moving column 12 simultaneously drives the rack 13 to rise. As the rack 13 rises... During the process, rack 13 will synchronously drive gear 14 to rotate. The rotation of gear 14 will drive rack 16 to move downward. The movement of rack 16 will drive slide rod 15 to move. The movement of slide rod 15 will drive limit plate 17 to move. After moving a certain distance, limit plate 17 can clamp and fix the accessories placed on L support plate 7, which can prevent the accessories from displacing and shaking during the positioning and movement process. At the same time, after the limit plate 17 fixes and limits the accessories, it can improve the welding accuracy and quality of the accessory beam of the device and avoid the subsequent reduction of welding accuracy due to the vibration and displacement of the accessories. Overall working principle: The L-shaped support plate 7 can synchronously move the parts it places on it, enabling automated positioning of the parts before welding. It can accurately position the parts to be welded, improving the welding quality and accuracy of the device. The limiting plate 17 can clamp and fix the parts placed on the L-shaped support plate 7, preventing displacement and shaking of the parts during positioning and movement. At the same time, after the limiting plate 17 fixes and limits the parts, it can improve the welding accuracy and quality of the part beam of the device, and avoid the subsequent reduction in welding accuracy caused by the shaking and displacement of the parts.

[0022] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the pretreatment mechanism 8 includes an L-rod 801, which is fixedly connected to the circumferential surface of the movable column 12. A connecting block 802 is fixedly connected to the top of the L-rod 801, and a pushing inclined plate 803 is fixedly connected to the circumferential surface of the connecting block 802. An anti-scratch rubber plate 804 is fixedly connected to the inner wall of the pushing inclined plate 803. When the device is in use, the movement of the moving column 12 will cause the L-rod 801 to move and rise. The movement of the L-rod 801 will cause the connecting block 802 to move and rise synchronously. The movement of the connecting block 802 will cause the pushing inclined plate 803 to move and rise. The movement of the pushing inclined plate 803 will cause the anti-scratch rubber plate 804 to rise. After the anti-scratch rubber plate 804 rises a certain distance, if the accessory is too offset, the anti-scratch rubber plate 804 will contact one side of the accessory. At this time, the anti-scratch rubber plate 804 will simultaneously push the accessory through its own inclined surface to center the welding area, which can improve the accuracy of the initial positioning of the accessory, improve the subsequent welding quality, and improve the welding efficiency of the device. The pretreatment mechanism 8 also includes a fixed frame 805, which is fixedly connected to the inner wall of the L-support plate 7. A motor 806 is fixedly connected to the left side of the fixed frame 805. A reciprocating screw 807 is rotatably connected to the inner wall of the fixed frame 805. A moving block 808 is movably connected to the circumferential surface of the reciprocating screw 807. An L-rod 809 is fixedly connected to the circumferential surface of the moving block 808. A cleaning air nozzle 810 is fixedly connected to the inner wall of the L-rod 809. The moving block 808 is slidably connected to the inner wall of the fixed frame 805 and is used to drive the L-rod 809 to move. The reciprocating screw 807 is fixedly connected to the output end of the motor 806. When the device is in use, as the L-support plate 7 moves, it drives the fixed frame 805 to move synchronously. The movement of the fixed frame 805 drives the motor 806 to move, at which point the motor 806 starts synchronously. The output end of the motor 806 drives the reciprocating screw 807 to rotate. The rotation of the reciprocating screw 807 drives the moving block 808 to rotate. At this time, the moving block 808 slides on the inner wall of the fixed frame 805, causing the moving block 808 to only move along the inner wall during the rotation of the reciprocating screw 807. The reciprocating screw 807 has a reciprocating groove on its surface, which allows it to move laterally in a reciprocating manner. During the movement of the moving block 808, the moving block 808 will drive the L-rod 809 to move. The movement of the L-rod 809 will drive the cleaning air nozzle 810 to move. At this time, the cleaning air nozzle 810 can clean the dust and debris on the surface of the component and perform welding pretreatment on the component before welding. This will prevent the dust and debris on the surface of the component from affecting the welding accuracy in the subsequent welding process and improve the welding effect of the device. The scraping mechanism 9 includes a fixed column 901, which is fixedly connected to the inner wall of the L rod 809, and a scraper 902 is fixedly connected to the circumferential surface of the fixed column 901. After welding is completed, the movement of L-rod 2 809 will drive the movement of fixed column 1 901. The movement of fixed column 1 901 will simultaneously drive scraper 902. At this time, scraper 902 can scrape and clean the small amount of welding slag between the parts to be welded. After welding, the completed parts can be pre-cleaned, which can reduce the subsequent cleaning cost, improve economic efficiency, and improve the welding effect of the device to a certain extent. The scraping mechanism 9 also includes an L-rod 3 903, which is fixedly connected to the circumferential surface of the L-rod 1 801. A fixed post 2 904 is fixedly connected to the top of the L-rod 3 903. An elastic telescopic rod 2 905 is fixedly connected to the top of the L-rod 3 903. A top plate 906 is fixedly connected to the telescopic end of the elastic telescopic rod 2 905. An anti-scratch rubber ring 907 is fixedly connected to the top of the top plate 906. The top plate 906 contacts the L-support plate 7 and is used to push the elevator accessories. The anti-scratch rubber ring 907 contacts the L-support plate 7.

[0023] When the device is in use, the lateral upward movement of L-rod 801 will synchronously drive L-rod 903 to move upward. The upward movement of L-rod 903 will drive the fixed column 904 to move upward. At the same time, L-rod 903 will drive the elastic telescopic rod 905 to move upward. The movement of the elastic telescopic rod 905 will drive the top plate 906 to move upward. The upward movement of the top plate 906 will drive the anti-scratch rubber ring 907 to move upward. After rising a certain distance, the anti-scratch rubber ring 907 will contact the bottom of the accessory and push the accessory, so that the accessory on L-support plate 7 and the accessory placed on base 1 are tightly fitted together, which can reduce welding gaps and directly improve the welding quality of the device. Overall working principle: The anti-scratch rubber plate 804 simultaneously pushes the accessory to center the welding area through its inclined surface, which can improve the accuracy of the initial positioning of the accessory, improve the subsequent welding quality, and improve the welding efficiency of the device. The movement of L-rod 809 will drive the cleaning air nozzle 810 to move. At this time, the cleaning air nozzle 810 can clean the dust and debris on the surface of the accessory welding area, which can perform welding pretreatment on the accessory before welding, so as to avoid the accessory's surface dust and debris affecting the subsequent welding accuracy during the welding process, thus improving the welding effect of the device. The scraper 902 can scrape and clean the small amount of welding slag between the accessories to be welded, which can perform preliminary cleaning of the completed accessory after welding, reduce subsequent cleaning costs, improve economic efficiency, and improve the welding effect of the device to a certain extent. The anti-scratch rubber ring 907 will contact the bottom of the accessory and push the accessory, so that the accessory on L-support plate 7 and the accessory placed on base 1 are tightly attached, which can reduce welding gaps and directly improve the welding quality of the device.

[0024] This invention provides a welding device for elevator car gantry beams. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A welding equipment for elevator car gantry beams, comprising a base (1), characterized in that: An electric slide rail (2) is provided on the base (1). A multi-angle welding device (3) is installed at the output end of the electric slide rail (2). A motor (4) is fixedly connected to the front of the base (1). A reciprocating screw (5) is rotatably connected to the inner wall of the base (1). A moving rod (6) is movably connected to the circumferential surface of the reciprocating screw (5). An L-shaped support plate (7) is fixedly connected to the top of the moving rod (6). A limit post (10) is fixedly connected to the inner wall of the base (1). A bracket (11) is fixedly connected to the top of the L-shaped support plate (7). The inner wall of the L-shaped support plate (7) is slidably connected to a movable column (12), the circumferential surface of the movable column (12) is fixedly connected to a rack (13), the circumferential surface of the bracket (11) is rotatably connected to a gear (14), the inner wall of the bracket (11) is slidably connected to a slide rod (15), the inner wall of the slide rod (15) is fixedly connected to a rack (16), the rear part of the slide rod (15) is fixedly connected to a limit plate (17), the inner wall of the movable column (12) is rotatably connected to a roller (18), and a guide plate (19) is installed on the base (1).

2. The elevator car gantry beam welding equipment according to claim 1, characterized in that: The inner wall of the L support plate (7) is provided with a pre-treatment mechanism (8) for cleaning dust and debris on the surface of elevator parts. The inner wall of the pre-treatment mechanism (8) is provided with a scraping mechanism (9) for cleaning and scraping welding slag. The reciprocating screw (5) is fixedly connected to the output end of the motor (4). The moving rod (6) is slidably connected to the circumferential surface of the limiting post (10). The limiting post (10) is used to guide and limit the movement of the moving rod (6). The guide plate (19) is located on the movement trajectory of the roller (18). The guide plate (19) is used to push the roller (18) to rise.

3. The elevator car gantry beam welding equipment according to claim 2, characterized in that: The first rack (13) meshes with the gear (14), and the first rack (13) is used to drive the gear (14) to rotate. The gear (14) meshes with the second rack (16), and the gear (14) is used to drive the second rack (16) to move downward.

4. The elevator car gantry beam welding equipment according to claim 3, characterized in that: The pretreatment mechanism (8) includes an L-rod (801), which is fixedly connected to the circumferential surface of the movable column (12). A connecting block (802) is fixedly connected to the top of the L-rod (801), and a pushing inclined plate (803) is fixedly connected to the circumferential surface of the connecting block (802). An anti-scratch rubber plate (804) is fixedly connected to the inner wall of the pushing inclined plate (803).

5. The elevator car gantry beam welding equipment according to claim 4, characterized in that: The pretreatment mechanism (8) also includes a fixed frame (805), which is fixedly connected to the inner wall of the L support plate (7). A motor (806) is fixedly connected to the left side of the fixed frame (805). A reciprocating screw two (807) is rotatably connected to the inner wall of the fixed frame (805). A moving block (808) is movably connected to the circumferential surface of the reciprocating screw two (807). An L rod two (809) is fixedly connected to the circumferential surface of the moving block (808). A cleaning air nozzle (810) is fixedly connected to the inner wall of the L rod two (809).

6. The elevator car gantry beam welding equipment according to claim 5, characterized in that: The movable block (808) is slidably connected to the inner wall of the fixed frame (805), and the movable block (808) is used to drive the L rod (809) to move. The reciprocating screw (807) is fixedly connected to the output end of the motor (806).

7. The elevator car gantry beam welding equipment according to claim 6, characterized in that: The scraping mechanism (9) includes a fixed column (901), which is fixedly connected to the inner wall of the L rod (809), and a scraper (902) is fixedly connected to the circumferential surface of the fixed column (901).

8. The elevator car gantry beam welding equipment according to claim 7, characterized in that: The scraping mechanism (9) also includes an L-bar three (903), which is fixedly connected to the circumferential surface of the L-bar one (801). A fixing post two (904) is fixedly connected to the top of the L-bar three (903), and an elastic telescopic rod two (905) is fixedly connected to the top of the L-bar three (903). A top plate (906) is fixedly connected to the telescopic end of the elastic telescopic rod two (905), and an anti-scratch rubber ring (907) is fixedly connected to the top of the top plate (906).

9. The elevator car gantry beam welding equipment according to claim 8, characterized in that: The top plate (906) contacts the L support plate (7), and the top plate (906) is used to push the elevator accessories. The anti-scratch rubber ring (907) contacts the L support plate (7).

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