A punching device special for elevator pit ladder

Abstract

The utility model discloses a kind of punching equipment special for elevator pit ladder stand, it is related to elevator pit ladder stand processing equipment technical field, including lower workbench, further including punching die mechanism, punching power mechanism and material removal anti-flattening mechanism, punching die mechanism contains lower template, the upper side middle part of lower workbench is installed with lower template, the upper side of lower template is provided with female die, the upper side of female die is fixedly connected with material return plate by support block, large round guide hole, square guide hole and small round guide hole are respectively set on material return plate from left to right, the bottom end of four guide columns is respectively fixedly connected with the upper side four corners of female die, four guide columns are slidably connected with the guide hole of the upper side four corners of male die fixed plate, the column section of guide column located male die fixed plate lower side is sleeved with spring;Punching power mechanism is installed in the upper side four corners of lower workbench.The punching equipment special for elevator pit ladder stand is convenient and fast to the punching of ladder stand square tube, and the ladder stand square tube can be prevented from being flattened when punching.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator pit ladder processing equipment, specifically a special punching equipment for elevator pit ladders. Background Technology

[0002] For elevator pit ladders, holes need to be punched at designated locations on square tubes. These include evenly spaced square holes for installing footboards, large round holes for connecting to the frame, and small round holes at the head for installing auxiliary devices. Previously, drilling these holes was inconvenient, so specialized punching equipment was developed to address this issue. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a special punching device for elevator pit climbing ladders. It can punch the climbing ladder square tubes conveniently and quickly, and can prevent the climbing ladder square tubes from being flattened during punching, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a special punching device for elevator pit ladders, including a lower workbench, and further comprising: The punching die mechanism includes a lower template, a die cavity, guide pillars, springs, a punch fixing plate, an ejector plate, large circular guide holes, square guide holes, small circular guide holes, and support blocks. The lower template is installed in the upper middle part of the lower worktable, and the die cavity is set on the upper side of the lower template. The ejector plate is fixedly connected to the upper side of the die cavity through the support blocks. The ejector plate has large circular guide holes, square guide holes, and small circular guide holes respectively opened from left to right. The bottom ends of four guide pillars are fixedly connected to the four corners of the upper side of the die cavity. The four guide pillars are slidably connected to the guide holes at the four corners of the punch fixing plate. The column section of the guide pillar located on the lower side of the punch fixing plate is sleeved with a spring. The punching power mechanism is installed at the four upper corners of the lower worktable; The material unloading anti-flattening mechanism is installed on the top rear side of the lower worktable.

[0005] Furthermore, the punching die mechanism also includes a large punch, a square punch, and a small punch. The top end of the large punch is fixedly connected to the bottom of the punch fixing plate at the position corresponding to the large circular guide hole. The top end of the square punch is fixedly connected to the bottom of the punch fixing plate at the position corresponding to the square guide hole. The top end of the small punch is fixedly connected to the bottom of the punch fixing plate at the position corresponding to the small circular guide hole.

[0006] Insert the ladder-shaped square tube to be punched between the ejector plate and the die. If a square hole is to be made in the ladder-shaped square tube, pass the tube through the middle between the ejector plate and the die, positioning it below the square guide hole. If a large hole is to be made, pass the tube through the left side between the ejector plate and the die, positioning it below the large round guide hole. If a small hole is to be made, pass the tube through the right side between the ejector plate and the die, positioning it below the small round guide hole. (The punching power mechanism working belt...) The moving punch fixing plate moves down, which in turn moves the large punch, square punch, and small punch down. The large punch, square punch, and small punch pass through the large round guide hole, square guide hole, and small round guide hole on the ejector plate in sequence, which can punch corresponding holes on the ladder square tube. The lower die and the die are also provided with ejection channels corresponding to the large round guide hole, square guide hole, and small round guide hole. The fragments that fall off the ladder square tube from the punching process fall into the cavity inside the lower worktable from the corresponding ejection channels. The ejection anti-flattening mechanism extends into the ladder square tube during punching to prevent the ladder square tube from collapsing and deforming due to pressure during punching.

[0007] Furthermore, the punching die mechanism also includes an upper backing plate, and the upper backing plate is provided on the upper side of the punch fixing plate.

[0008] Furthermore, the punching die mechanism also includes a positioning plate. The positioning plate is fixedly connected to the front side of the die. The positioning plate is used to support the front end of the ladder square tube, which facilitates the feeding of the ladder square tube.

[0009] Furthermore, the punching power mechanism includes guide columns, an upper worktable, a power slide plate, and a hydraulic cylinder. The bottom ends of four guide columns are fixedly connected to the four corners of the upper side of the lower worktable, and the top ends of the four guide columns are fixedly connected to the four corners of the upper worktable. The power slide plate is located above the upper pad plate, and the four guide columns are slidably connected to the sliding holes at the four corners of the power slide plate. The fixed end of a vertical hydraulic cylinder is fixedly connected to the middle of the upper worktable, and the telescopic end of the bottom of the hydraulic cylinder is connected to the middle of the upper side of the power slide plate.

[0010] The hydraulic cylinder is connected to an external hydraulic source via hydraulic lines and a solenoid valve. When the hydraulic cylinder extends, it pushes the power slide plate downwards along the guide post. The power slide plate presses against the upper pad plate and moves downwards, causing the punch fixing plate to move downwards along the guide post. At this time, the spring is compressed. The large punch, square punch, and small punch at the bottom of the punch fixing plate punch out the corresponding holes in the corresponding ladder square tube. Then, the hydraulic cylinder shortens, causing the power slide plate to move upwards along the guide post. The punch fixing plate and the upper pad plate are no longer under downward pressure. The spring returns to its original position and extends, pushing the punch fixing plate upwards along the guide post. This causes the large punch, square punch, and small punch to disengage from the large round guide hole, square guide hole, and small round guide hole on the ejector plate. Then, the front and rear positions of the ladder square tube can be changed, and the punching operation can be repeated.

[0011] Furthermore, the material stripping and anti-flattening mechanism includes a material support frame, a first support bracket, a short support rod, an anti-flattening pad die, a long support rod, a second support bracket, a middle support rod, and a third support bracket. The rear side of the die is fixedly connected to the front end of the material support frame. Three anti-flattening pad dies are respectively provided below the material ejector plate at positions corresponding to the large circular guide hole, the square guide hole, and the small circular guide hole. The rear end of the right anti-flattening pad die is fixedly connected to the front end of the short support rod. The rear end of the short support rod is fixedly installed on the upper front end of the material support frame through the first support bracket. The rear end of the middle anti-flattening pad die is fixedly connected to the front end of the long support rod. The rear end of the long support rod is fixedly installed on the upper rear end of the material support frame through the second support bracket. The rear end of the left anti-flattening pad die is fixedly connected to the front end of the middle support rod. The rear end of the middle support rod is fixedly installed on the upper middle part of the material support frame through the third support bracket. When arranging the ladder square tube, first place the rear end of the ladder square tube on the positioning plate, then align it with the corresponding anti-flattening pad die, and push the ladder square tube backward until the rear end of the ladder square tube abuts against bracket one, bracket two, or bracket three. The anti-flattening pad die corresponding to the large round guide hole has a large hole, the anti-flattening pad die corresponding to the square guide hole has a square hole, and the anti-flattening pad die corresponding to the small round guide hole has a small hole. When punching, because the anti-flattening pad die fills the inside of the ladder square tube, the ladder square tube will not be flattened or deformed when the upper and lower sides are punched through. After punching, the ladder square tube can be moved forward along the corresponding anti-flattening pad die and support rod to change the punching position.

[0012] Furthermore, it also includes a square hole positioning mechanism, which comprises a longitudinal plate, a movable column, and a positioning bent rod. The front middle of the ejector plate is fixedly connected to the rear end of the longitudinal plate, and the side of the longitudinal plate is movably connected to the rear end of the positioning bent rod through the movable column. The front end of the positioning bent rod is bent downwards. The ladder square tube needs to be punched with equally spaced ladder square holes to install the steps. Therefore, after the ladder square tube below the square punch punches out the ladder square hole, the ladder square tube is moved forward, allowing the front end of the positioning bent rod to move downwards. This causes the downward-bent part of the positioning bent rod to insert into the newly punched ladder square hole. At this time, the square punch punches a new punching position. This operation can achieve the positioning of the punching position on the ladder square tube, so that the punched ladder square holes are evenly distributed on the ladder square tube.

[0013] Compared with existing technologies, the advantages of this special punching equipment for elevator pit ladders are: 1. This special punching equipment for elevator pit ladders inserts the ladder square tube to be punched between the ejector plate and the die. If a square hole is to be made in the ladder square tube, the ladder square tube is passed through the middle between the ejector plate and the die, so that the ladder square tube is below the square guide hole. If a large hole is to be made in the ladder square tube, the ladder square tube is passed through the left side between the ejector plate and the die, so that the ladder square tube is below the large round guide hole. If a small hole is to be made in the ladder square tube, the ladder square tube is passed through the right side between the ejector plate and the die, so that the ladder square tube is below the small round guide hole. The punching power mechanism drives the punch fixing plate to move down, and the punch fixing plate drives the large punch, square punch and small punch to move down. The large punch, square punch and small punch pass through the large round guide hole, square guide hole and small round guide hole on the ejector plate in sequence, so that the corresponding hole can be punched in the ladder square tube. The punching is convenient and fast.

[0014] 2. This special punching equipment for elevator pit ladders involves placing the rear end of the ladder square tube onto the positioning plate, aligning it with the corresponding anti-flattening pad die, and pushing the ladder square tube backward until its rear end abuts against bracket one, bracket two, or bracket three. The anti-flattening pad die corresponding to the large circular guide hole has a large hole, the anti-flattening pad die corresponding to the square guide hole has a square hole, and the anti-flattening pad die corresponding to the small circular guide hole has a small hole. During punching, because the anti-flattening pad die fills the ladder square tube, it will not be flattened or deformed when punched through its upper and lower sides. After punching, the ladder square tube can be moved forward along the corresponding anti-flattening pad die and support rod to change the punching position.

[0015] 3. This special punching equipment for elevator pit ladders requires punching equally spaced square holes in the ladder square tube to install the steps. Therefore, after punching out the square hole in the ladder square tube below the square punch head, the ladder square tube is moved forward, allowing the front end of the positioning bend rod to move downward. The downward-bent part of the positioning bend rod is inserted into the newly punched ladder square hole. At this time, the square punch head punches a new punching position. This operation can achieve the positioning of the punching position on the ladder square tube, so that the punched ladder square holes are evenly distributed on the ladder square tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a schematic diagram of the rear structure of this utility model; Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 5 This is a schematic diagram of the completed ladder square tube structure of this utility model; In the diagram: 1. Lower workbench; 2. Punching die mechanism; 21. Lower template; 22. Die; 23. Guide post; 24. Spring; 25. Punch fixing plate; 26. Upper pad; 27. Ejector plate; 28. Large punch; 29. ​​Square punch; 210. Small punch; 211. Large round guide hole; 212. Square guide hole; 213. Small round guide hole; 214. Support block; 215. Positioning plate; 216. Elevating block; 3. Square hole positioning mechanism; 31. Longitudinal plate; 32. Movable column; 33. Positioning bent rod; 4. Punching power mechanism; 41. Guide post; 42. Upper workbench; 43. Power slide plate; 44. Hydraulic cylinder; 5. Material stripping and anti-flattening mechanism; 51. Material support frame; 52. Support 1; 53. Short support rod; 54. Anti-flattening pad die; 55. Long support rod; 56. Support 2; 57. Middle support rod; 58. Support 3; 6. Ladder square tube; 7. Ladder square hole; 8. Ladder large hole; 9. Ladder small hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1, please refer to Figures 1 to 5 This utility model provides a technical solution: a special punching device for elevator pit ladders, including a lower workbench 1, a punching mold mechanism 2, a punching power mechanism 4, and a material stripping and anti-flattening mechanism 5.

[0019] The punching die mechanism 2 includes a lower template 21, a die 22, guide pillars 23, springs 24, a punch fixing plate 25, a stripper plate 27, a large circular guide hole 211, a square guide hole 212, a small circular guide hole 213, and a support block 214. The lower template 21 is installed in the middle of the upper side of the lower worktable 1. The die 22 is set on the upper side of the lower template 21. The stripper plate 27 is fixedly connected to the upper side of the die 22 through the support block 214. The stripper plate 27 has a large circular guide hole 211, a square guide hole 212, and a small circular guide hole 213 respectively opened from left to right. The bottom ends of four guide pillars 23 are fixedly connected to the four corners of the upper side of the die 22. The four guide pillars 23 are slidably connected to the guide holes at the four corners of the punch fixing plate 25. The column section of the guide pillar 23 located on the lower side of the punch fixing plate 25 is sleeved with a spring 24.

[0020] The punching die mechanism 2 also includes a large punch 28, a square punch 29, and a small punch 210. The bottom of the punch fixing plate 25 is fixedly connected to the top of the large punch 28 at the position corresponding to the large circular guide hole 211. The bottom of the punch fixing plate 25 is fixedly connected to the top of the square punch 29 at the position corresponding to the square guide hole 212. The bottom of the punch fixing plate 25 is fixedly connected to the top of the small punch 210 at the position corresponding to the small circular guide hole 213. There are two small punches 210 here, which can punch two close ladder holes 9 on the ladder square tube 6.

[0021] Insert the ladder-shaped square tube 6, to be punched, between the ejector plate 27 and the die 22. If a ladder-shaped square hole 7 needs to be made in the ladder-shaped square tube 6, pass the ladder-shaped square tube 6 through the middle between the ejector plate 27 and the die 22, so that the ladder-shaped square tube 6 is below the square guide hole 212. If a large ladder-shaped hole 8 needs to be made in the ladder-shaped square tube 6, pass the ladder-shaped square tube 6 through the left side between the ejector plate 27 and the die 22, so that the ladder-shaped square tube 6 is below the large circular guide hole 211. If a small ladder-shaped hole 9 needs to be made in the ladder-shaped square tube 6, pass the ladder-shaped square tube 6 through the right side between the ejector plate 27 and the die 22, so that the ladder-shaped square tube 6 is below the small circular guide hole 213. The punching power mechanism 4 works to fix the punch. As plate 25 moves downward, punch fixing plate 25 drives large punch 28, square punch 29 and small punch 210 to move downward. Large punch 28, square punch 29 and small punch 210 pass through large round guide hole 211, square guide hole 212 and small round guide hole 213 on ejector plate 27 in sequence, which can punch corresponding holes on ladder square tube 6. Lower template 21 and die 22 are also provided with unloading channels corresponding to large round guide hole 211, square guide hole 212 and small round guide hole 213. Fragments that fall off the ladder square tube 6 from punching fall into the cavity inside the lower worktable 1 from the corresponding unloading channels. The unloading anti-flattening mechanism 5 extends into the ladder square tube 6 during punching to prevent the ladder square tube 6 from collapsing and deforming due to pressure during punching.

[0022] The punching die mechanism 2 also includes an upper pad 26 and a shim block 216. The upper pad 26 is provided on the upper side of the punch fixing plate 25, and the shim block 216 is fixedly connected to the upper middle part of the upper pad 26.

[0023] The punching die mechanism 2 also includes a positioning plate 215. The positioning plate 215 is fixedly connected to the front side of the die 22. The positioning plate 215 is used to support the front end of the ladder square tube 6, which facilitates the feeding of the ladder square tube 6.

[0024] The punching power mechanism 4 is installed at the four upper corners of the lower worktable 1.

[0025] The punching power mechanism 4 includes guide posts 41, an upper worktable 42, a power slide plate 43, and a hydraulic cylinder 44. The bottom ends of four guide posts 41 are fixedly connected to the four corners of the upper side of the lower worktable 1, and the top ends of four guide posts 41 are fixedly connected to the four corners of the upper worktable 42. The power slide plate 43 is located above the upper pad 26. The four guide posts 41 are slidably connected to the sliding holes at the four corners of the power slide plate 43. The fixed end of the vertical hydraulic cylinder 44 is fixedly connected to the middle of the upper worktable 42, and the telescopic end of the bottom of the hydraulic cylinder 44 is connected to the upper middle of the power slide plate 43.

[0026] Hydraulic cylinder 44 is connected to an external hydraulic source through hydraulic lines and solenoid valves. When hydraulic cylinder 44 extends, it pushes power slide plate 43 to move down along guide post 41. Power slide plate 43 presses against shim block 216 and upper pad plate 26 and moves down, thereby causing punch fixing plate 25 to move down along guide post 23. At this time, spring 24 is compressed. At this time, the large punch 28, square punch 29 and small punch 210 at the bottom of punch fixing plate 25 punch the corresponding ladder square tube 6 out of the corresponding hole. Then, hydraulic cylinder 44 shortens and drives power slide plate 43 to move up along guide post 41. Punch fixing plate 25 and upper pad plate 26 are no longer under downward pressure. Spring 24 returns to its original position and extends, pushing punch fixing plate 25 to move up along guide post 23. This causes large punch 28, square punch 29 and small punch 210 to disengage from large round guide hole 211, square guide hole 212 and small round guide hole 213 on ejector plate 27. Then the front and rear positions of ladder square tube 6 can be changed, and the above punching operation can be repeated.

[0027] The material unloading and anti-flattening mechanism 5 is installed on the top rear side of the lower worktable 1.

[0028] Example 2, please refer to Figures 1 to 5 This utility model provides a technical solution: a special punching device for elevator pit ladders. This embodiment is a further explanation of the structure of Embodiment 1. The material ejection anti-flattening mechanism 5 includes a material support frame 51, a first support bracket 52, a short support rod 53, an anti-flattening pad die 54, a long support rod 55, a second support bracket 56, a middle support rod 57, and a third support bracket 58. The rear side of the die 22 is fixedly connected to the front end of the material support frame 51. Below the ejector plate 27, corresponding to the positions of the large circular guide hole 211, the square guide hole 212, and the small circular guide hole 213, three anti-flattening pad dies 54 are respectively provided. The rear end of the anti-flattening pad die 54 on the right side is fixedly connected to the short support rod 58. The front end of the support rod 53 and the rear end of the short support rod 53 are fixedly installed on the upper front end of the material support frame 51 through bracket one 52. The rear end of the anti-flattening pad die 54 in the middle is fixedly connected to the front end of the long support rod 55. The rear end of the long support rod 55 is fixedly installed on the upper rear end of the material support frame 51 through bracket two 56. The rear end of the anti-flattening pad die 54 on the left side is fixedly connected to the front end of the middle support rod 57. The rear end of the middle support rod 57 is fixedly installed on the upper middle part of the material support frame 51 through bracket three 58.

[0029] There are four support blocks 214 in total, which are distributed horizontally at equal distances on the lower side of the ejector plate 27. There is a space between two adjacent support blocks 214 for inserting the ladder square tube 6. Three anti-flattening pad die 54 are distributed in these three spaces.

[0030] When arranging the ladder square tube 6, first place the rear end of the ladder square tube 6 on the positioning plate 215, then align it with the corresponding anti-flattening pad die 54, and push the ladder square tube 6 backward until the rear end of the ladder square tube 6 abuts against bracket 1 52, bracket 2 56 or bracket 3 58. The anti-flattening pad die 54 corresponding to the large round guide hole 211 has a large hole, the anti-flattening pad die 54 corresponding to the square guide hole 212 has a square hole, and the anti-flattening pad die 54 corresponding to the small round guide hole 213 has a small hole. When punching, since the anti-flattening pad die 54 fills the inside of the ladder square tube 6, the ladder square tube 6 will not be flattened or deformed when the upper and lower sides are punched through. After punching, the ladder square tube 6 can be moved forward along the corresponding anti-flattening pad die 54 and support rod to change the punching position.

[0031] Example 3, please refer to Figures 1 to 5 This utility model provides a technical solution: a special punching device for elevator pit ladders. This embodiment is largely the same in structure as Embodiment 2, the difference being: A square hole positioning mechanism 3 is also provided. The square hole positioning mechanism 3 includes a longitudinal plate 31, a movable column 32, and a positioning bent rod 33. The front middle of the ejector plate 27 is fixedly connected to the rear end of the longitudinal plate 31. The side of the longitudinal plate 31 is movably connected to the rear end of the positioning bent rod 33 through the movable column 32. The front end of the positioning bent rod 33 is bent downward. The ladder square tube 6 needs to punch ladder square holes 7 at equal intervals to install the steps. Therefore, after the ladder square tube 6 below the square punch 29 punches out the ladder square holes 7, the ladder square tube 6 is moved forward, allowing the front end of the positioning bent rod 33 to move downward. The downward-bent part of the front end of the positioning bent rod 33 is inserted into the newly punched ladder square hole 7. The square punch 29 then punches a new punching position. This operation can realize the positioning of the punching position on the ladder square tube 6, so that the punched ladder square holes 7 are evenly distributed on the ladder square tube 6.

[0032] This special punching machine for elevator pit ladders consists of a main body that is a punching machine with three punching positions on the left, center, and right. It is equipped with punches of different sizes to correspond to large round holes, square holes, and small round holes. During operation, the ladder square tube 6 is inserted under the punch, positioned, and then punched. The ladder square tube 6 is then moved to punch the next hole. A support frame is used to support and fix the ladder square tube 6; the length of the support frame can accommodate the longest ladder. After punching the square hole, the tube is pulled out and inserted into the other two punching positions to punch the large and small round holes.

[0033] The workbench in front of the equipment is used to support the ladder square tube 6, and the square hole positioning mechanism 3 is used to control the spacing between the square holes. The relative positions of the positioning bent rod 33 and the longitudinal plate 31 can be changed by the movable column 32 to adjust the spacing of the square holes. After punching the first square hole, the ladder square tube 6 is moved forward, and the bottom of the front end of the positioning bent rod 33 of the square hole positioning mechanism 3 is rotated and inserted into the square hole that was just punched. Then, the second square hole can be punched at a fixed spacing.

[0034] When punching the large hole 8 and the small hole 9 of the ladder, the existing holes on the ladder square tube 6 can be inserted into the studs and positioning plates 215 to fix the position of the ladder square tube 6.

[0035] It is worth noting that the hydraulic cylinder 44 disclosed in the above embodiments is controlled by an external PLC controller, and its control operation adopts a method commonly used in the prior art.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special punching device for elevator pit ladders, comprising a lower workbench (1), characterized in that, Also includes: The punching die mechanism (2) includes a lower template (21), a die (22), guide pillars (23), a spring (24), a punch fixing plate (25), a stripper plate (27), and a support block (214). The lower template (21) is installed in the middle of the upper side of the lower worktable (1). The die (22) is provided on the upper side of the lower template (21). The stripper plate (27) is fixedly connected to the upper side of the die (22) through the support block (214). The stripper plate (27) is provided with a large circular guide hole (211), a square guide hole (212), and a small circular guide hole (213) from left to right. The bottom ends of four guide pillars (23) are fixedly connected to the four corners of the upper side of the die (22). The four guide pillars (23) are slidably connected to the guide holes at the four corners of the punch fixing plate (25). The column section of the guide pillar (23) located on the lower side of the punch fixing plate (25) is sleeved with a spring (24). The punching power mechanism (4) is installed at the four upper corners of the lower worktable (1); The material removal anti-flattening mechanism (5) is installed on the top rear side of the lower worktable (1).

2. The punching device for elevator pit ladders according to claim 1, characterized in that: The punching die mechanism (2) also includes a large punch (28), a square punch (29) and a small punch (210). The bottom of the punch fixing plate (25) is fixedly connected to the top of the large punch (28) at the position corresponding to the large circular guide hole (211). The bottom of the punch fixing plate (25) is fixedly connected to the top of the square punch (29) at the position corresponding to the square guide hole (212). The bottom of the punch fixing plate (25) is fixedly connected to the top of the small punch (210) at the position corresponding to the small circular guide hole (213).

3. The punching device for elevator pit ladders according to claim 1, characterized in that: The punching die mechanism (2) also includes an upper pad (26), and the upper pad (26) is provided on the upper side of the punch fixing plate (25).

4. The punching device for elevator pit ladders according to claim 1, characterized in that: The punching die mechanism (2) also includes a positioning plate (215), and the positioning plate (215) is fixedly connected to the front side of the die (22).

5. The punching device for elevator pit ladders according to claim 3, characterized in that: The punching power mechanism (4) includes guide columns (41), an upper worktable (42), a power slide plate (43), and a hydraulic cylinder (44). The bottom ends of four guide columns (41) are fixedly connected to the four corners of the upper side of the lower worktable (1), and the top ends of four guide columns (41) are fixedly connected to the four corners of the upper worktable (42). The power slide plate (43) is located above the upper pad (26). The four guide columns (41) are slidably connected to the sliding holes at the four corners of the power slide plate (43). The fixed end of the vertical hydraulic cylinder (44) is fixedly connected to the middle part of the upper worktable (42), and the telescopic end of the bottom of the hydraulic cylinder (44) is connected to the upper middle part of the power slide plate (43).

6. The punching device for elevator pit ladders according to claim 1, characterized in that: The material removal and anti-flattening mechanism (5) includes a material support frame (51), a first support frame (52), a short support rod (53), an anti-flattening pad die (54), a long support rod (55), a second support frame (56), a middle support rod (57), and a third support frame (58). The rear side of the die (22) is fixedly connected to the front end of the material support frame (51). Three anti-flattening pad dies (54) are respectively provided below the ejector plate (27) at the positions corresponding to the large circular guide hole (211), the square guide hole (212), and the small circular guide hole (213). The rear end of the anti-flattening pad die (54) on the right side is... The front end of the short support rod (53) is fixedly connected, and the rear end of the short support rod (53) is fixedly installed on the upper front end of the material rack (51) through bracket one (52). The rear end of the anti-flat pad die (54) in the middle is fixedly connected to the front end of the long support rod (55). The rear end of the long support rod (55) is fixedly installed on the upper rear end of the material rack (51) through bracket two (56). The rear end of the anti-flat pad die (54) on the left side is fixedly connected to the front end of the middle support rod (57). The rear end of the middle support rod (57) is fixedly installed on the upper middle part of the material rack (51) through bracket three (58).

7. The punching device for elevator pit ladders according to claim 1, characterized in that: It also includes a square hole positioning mechanism (3), which includes a longitudinal plate (31), a movable column (32) and a positioning bent rod (33). The front middle of the ejector plate (27) is fixedly connected to the rear end of the longitudinal plate (31), and the side of the longitudinal plate (31) is movably connected to the rear end of the positioning bent rod (33) through the movable column (32). The front end of the positioning bent rod (33) is bent downward.

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