Transverse cutter mounting structure of bag making machine

Abstract

The utility model discloses a transverse cutter mounting structure of a bag making machine, which is arranged between a driving vertical plate and a cutter cross beam and comprises two adapting blocks, a locking component and a cylindrical pin shaft, the two adapting blocks are respectively arranged at two ends of the cutter cross beam, the inner ends of the adapting blocks are fixedly connected with the end part of the cutter cross beam, and the locking component is fixedly connected with the cylindrical pin shaft. The bottom end of the adapter block is rotatably connected to the top end of the driving vertical plate through the cylindrical pin shaft; and the locking assembly is arranged at the top of the adapter block, and the locking assembly can lock the relative position of the adapter block and the driving vertical plate. The transverse cutter set can be conveniently maintained and overhauled, the maintenance and cutter replacement time is shortened, and manpower is also saved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag making equipment, in particular to a transverse cutting knife installation structure of a bag making machine. Background Art

[0002] During the processing and molding of plastic bags, the plastic film roll is unwound and continuously conveyed through a series of operations such as printing, transverse sealing and cutting, cold cutting, stacking or winding to process the bag body, such as the common continuous roll garbage bags, continuous roll food bags, stacked vest bags, etc.

[0003] In the existing transverse sealing and cutting stations, the knife beam spans across the bag making machine frame, and a transverse cutting knife group is installed at the bottom of the knife beam. The transverse cutting knife group generally includes a hot knife and a cutting knife. To achieve the up and down reciprocating motion of the transverse cutting knife group, guide columns are often used at both ends of the knife beam for guidance, and a cam drive mechanism or cylinder drive is used to achieve the sealing, cutting and lifting of the knife. However, this guiding method is not convenient for replacing and maintaining the transverse cutting knife group. During maintenance, it is often necessary to remove the entire moving part from the guide column, and it is often necessary to use an overhead crane for lifting. The whole process is time-consuming and labor-intensive.

[0004] Therefore, it is necessary to develop a bag making machine cross-cutting knife installation structure to address the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a bag making machine cross-cutting knife installation structure, which is convenient for maintenance and overhaul of the cross-cutting knife group, shortens the maintenance and knife changing time, and saves manpower.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model discloses a bag making machine cross-cutting knife installation structure, which is arranged between a driving vertical plate and a knife cross beam, and comprises an adapter block, a locking assembly and a cylindrical pin shaft, wherein two adapter blocks are respectively arranged at two ends of the knife cross beam, the inner end of the adapter block is fixedly connected to the end of the knife cross beam, and the bottom end of the adapter block is rotatably connected to the top end of the driving vertical plate through the cylindrical pin shaft; the locking assembly is arranged on the top of the adapter block, and the locking assembly can lock the relative position of the adapter block and the driving vertical plate.

[0008] Furthermore, a notch is provided on the inner end surface of the adapter block, and the end boss of the knife beam is inserted into the notch and fixed by bolts.

[0009] Furthermore, the adapter block is provided with a bolt through hole and a positioning pin hole on the top plate of the slot, and a plurality of the bolt through holes are arranged around the positioning pin hole, the bolt through holes are waist-shaped holes and the long side direction of the waist-shaped holes is perpendicular to the knife cross beam; a pad is also provided between the end boss of the knife cross beam and the top surface of the slot.

[0010] Furthermore, the locking assembly includes a cylinder and a locking pin rod. A circular hole is provided on the top of the adapter block. The cylinder is installed on the top surface of the adapter block. The vertically downward piston rod of the cylinder passes through the circular hole. The locking pin rod is coaxially fixed to the bottom end of the piston rod. The locking pin rod can extend downward into the positioning structure at the top end of the driving vertical plate.

[0011] Furthermore, the circular hole is a stepped hole, a guide sleeve is installed on the bottom hole of the circular hole, and the locking pin rod is slidably fitted in the guide sleeve.

[0012] Furthermore, the positioning structure includes a left-side wear-resistant block and a right-side wear-resistant sleeve, the left-side wear-resistant block is embedded in the top end surface of the left-side driving vertical plate, a long groove is centrally arranged on the left-side wear-resistant block, the long groove is opened along the length direction of the knife cross beam, and the bottom end of the left-side locking pin rod is inserted into the long groove; the right-side wear-resistant sleeve is embedded in the top end surface of the right-side driving vertical plate, a positioning circular hole is centrally opened on the right-side wear-resistant sleeve, and the bottom end of the right-side locking pin rod is inserted into the positioning circular hole; the gap between the width of the ear groove of the adapter block to accommodate the driving vertical plate and the thickness of the driving vertical plate is not less than 5 mm.

[0013] Furthermore, flat platforms are symmetrically provided at the bottom of the left locking pin rod, and the distance between the two flat platforms is adapted to the width of the long slot.

[0014] Furthermore, an oil channel is provided inside the cylindrical pin shaft, a grease nipple is provided at the outer port of the oil channel, and annular grooves are provided on the cylindrical pin shaft at the shaft sections matching the pin shaft hole 1 at the top of the driving vertical plate and the pin shaft hole 2 of the ear groove plate of the driving vertical plate, respectively, and a radial channel connected to the oil channel is provided at the bottom of the annular groove.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] The utility model discloses a bag-making machine cross-cutting knife installation structure. By setting a pin-connected adapter block and a driving vertical plate, when the cross-cutting knife group needs to be repaired or replaced, it is only necessary to open the locking assembly and deflect the entire knife beam to make the cross-cutting knife group face sideways, which is convenient for disassembly and maintenance, and reduces the difficulty of operation; through the setting of the locking assembly, the adapter block and the knife beam can be locked to prevent the cross-cutting knife group from moving during the sealing and cutting process, thereby ensuring stable and normal operation. The utility model discloses a bag-making machine cross-cutting knife installation structure, which is convenient for maintenance and overhaul of the cross-cutting knife group, shortens the maintenance and knife changing time, and saves manpower.

[0017] In addition, the connection strength between the adapter block and the knife beam can be increased by the bite-fitting fixed connection between the notch and the end protrusion of the knife beam. By setting the bolt through hole as a waist-shaped hole opened along the length direction of the equipment, the longitudinal installation error of the linear guide rails on both sides can be compensated. After installation, a conical pin is used to pass through the positioning pin hole and a bottom hole is made at the end protrusion of the knife beam to facilitate the next assembly after disassembly; by setting the pad and changing the thickness of the pad, the bottom edge of the cross-cutting knife group can be leveled to ensure uniform heat sealing marks. The cylinder drives the locking pin rod to be inserted into the positioning structure at the top of the driving vertical plate to lock the working position of the adapter block. When the cylinder drives the locking pin rod to exit the positioning structure, the adapter block is rotated to enter a working state that is convenient for maintenance and knife changing. By using the left wear-resistant block and the right wear-resistant sleeve made of wear-resistant materials, the lock pin rod will not be seriously worn even if it is repeatedly inserted and pulled out, ensuring the positioning accuracy for long-term use; through the coordinated use of the long groove and the positioning circular hole, even if the knife beam is thermally deformed by the heat transmitted from the cross-cutting knife group during normal operation, the knife beam becomes longer, and the left lock pin rod can slide in the long groove to achieve the bridging of the thermal deformation here, and will not get stuck. Through the setting of the flat table, the sliding contact area between the flat table and the side wall of the long groove is large, which reduces the amount of wear and increases the service life. Through the setting of the grease nipple, oil channel and the annular groove, lubricating grease can be added to the working surface of the rotating pair to avoid dry friction and reduce wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the main structure of the installation structure of the cross-cutting knife of the bag making machine of the utility model;

[0020] Figure 2 This is a right view structural diagram of the installation structure of the cross-cutting knife of the bag making machine of the utility model;

[0021] Figure 3 for Figure 1 A schematic diagram of the partial enlarged structure of the middle I part;

[0022] Figure 4 for Figure 1 A schematic diagram of the partially enlarged structure of the middle J part;

[0023] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of the AA part;

[0024] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of the BB part;

[0025] Figure 7 for Figure 4Schematic diagram of the cross-sectional structure of the CC part;

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of the adapter block of the utility model;

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the installation part of the left lock pin rod of the utility model.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. driving vertical plate; 101. ball slider; 102. pin shaft hole one; 103. left wear-resistant block; 1031. long groove; 104. right wear-resistant sleeve; 2. cam driving mechanism; 3. knife crossbeam; 4. cross-cutting knife group; 5. adapter block; 501. pin shaft hole two; 502. notch; 503. bolt through hole; 504. round hole; 505. guide sleeve; 6. cylinder; 7. cylindrical pin shaft; 701. grease nipple; 702. oil channel; 8. locking pin rod; 801. flat table; 9. pad. DETAILED DESCRIPTION

[0029] The core of the utility model is to provide a bag making machine cross-cutting knife installation structure, which is convenient for maintenance and overhaul of the cross-cutting knife group, shortens the maintenance and knife changing time, and saves manpower.

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the main structure of the installation structure of the cross-cutting knife of the bag making machine of the utility model; Figure 2 This is a right view structural diagram of the installation structure of the cross-cutting knife of the bag making machine of the utility model; Figure 3 for Figure 1 A schematic diagram of the partial enlarged structure of the middle I part; Figure 4 for Figure 1 A schematic diagram of the partially enlarged structure of the middle J part; Figure 5 for Figure 3Schematic diagram of the cross-sectional structure of the AA part; Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of the BB part; Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure of the CC part; Figure 8 This is a schematic diagram of the three-dimensional structure of the adapter block of the utility model; Fig. 9 It is a three-dimensional structural schematic diagram of the installation part of the left lock pin rod of the utility model.

[0033] In a specific embodiment, Figures 1 to 9 As shown, the transverse cutting knife installation structure of the bag making machine of the utility model is arranged between the driving vertical plate 1 and the knife cross beam 3. The driving vertical plate 1 is slidably connected to the linear guide rail through two ball sliders 101. The linear guide rail is vertically arranged outside the side wall of the bag making machine. The transverse cutting knife group 4 is installed below the knife cross beam 3. The transverse cutting knife group 4 includes a hot knife and a cutter for heat sealing and cold cutting of plastic film. The transverse cutting knife installation structure of the bag making machine of the utility model includes a set of adapter blocks 5, a locking assembly and a cylindrical pin shaft 7, and two sets are respectively arranged at both ends of the knife cross beam 3. The adapter block 5 is installed at the end of the knife cross beam 3, and the inner end of the adapter block 5 is fixedly connected to the end of the knife cross beam 3. The bottom end of the adapter block 5 is provided with an ear groove for accommodating the driving vertical plate 1, and the ear groove plate is rotatably connected to the top of the driving vertical plate 1 through the cylindrical pin shaft 7. The locking assembly is arranged on the top of the adapter block 5 , and the locking assembly can lock the relative position of the adapter block 5 and the driving vertical plate 1 , that is, it can lock the adapter block 5 just above the driving vertical plate 1 to prevent it from rotating around the cylindrical pin 7 .

[0034] By setting the adapter block 5 and the driving vertical plate 1 connected by the pin shaft, when the cross-cutting knife group 4 needs to be repaired or replaced, it is only necessary to open the locking assembly and swing the entire knife beam 3, so that the cross-cutting knife group 4 can be turned horizontally to one side, which is convenient for disassembly and maintenance, and reduces the difficulty of operation; through the setting of the locking assembly, the adapter block 5 and the knife beam 3 can be locked to prevent the cross-cutting knife group 4 from moving during the sealing and cutting process, thereby ensuring stable and normal operation. The utility model bag making machine cross-cutting knife installation structure is convenient for maintenance and overhaul of the cross-cutting knife group, shortens the maintenance and knife changing time, and saves manpower.

[0035] In a specific embodiment of the present invention, Figure 3 and Figure 4 As shown, a notch 502 is formed on the inner end surface of the adapter block 5, and the end boss of the blade cross beam 3 is inserted into the notch 502 and fixed by bolts.

[0036] Specifically, if Figure 3 , Figure 4 and Figure 8As shown, the adapter block 5 is provided with a bolt through hole 503 and a positioning pin hole on the top plate of the slot 502, and a plurality of bolt through holes 503 are arranged around the positioning pin hole, and the bolt through holes 503 are waist-shaped holes, and the long side direction of the waist-shaped holes is perpendicular to the knife cross beam 3. A cushion block 9 is also provided between the end convex head of the knife cross beam 3 and the top surface of the slot 502. There are a plurality of cushion blocks 9, and they are a series of slightly different thicknesses, and the appropriate thickness can be selected for assembly.

[0037] The connection strength between the adapter block 5 and the knife beam 3 can be increased by the bite-fitting and fixed connection between the notch 502 and the end convex head of the knife beam 3. The longitudinal installation error of the linear guide rails on both sides can be compensated by setting the bolt through hole 503 as a waist-shaped hole opened along the length direction of the equipment. After installation, a conical pin is used to pass through the positioning pin hole and a bottom hole is made at the end convex head of the knife beam 3 to facilitate the next assembly after disassembly; by setting the cushion block 9 and changing the thickness of the cushion block 9, the bottom edge of the cross-cutting knife group 4 can be leveled to ensure uniform heat sealing marks.

[0038] In a specific embodiment of the present invention, Figures 3 to 9 As shown, the locking assembly includes a cylinder 6 and a locking pin rod 8. A round hole 504 is opened on the top of the adapter block 5. The cylinder 6 is installed on the top surface of the adapter block 5 by screws. The piston rod of the cylinder 6 vertically downward passes through the round hole 504. The locking pin rod 8 is coaxially fixed to the bottom end of the piston rod. The screw section at the bottom end of the locking pin rod 8 is threadedly connected to the threaded hole of the piston rod and is tightened with a lock nut. The locking pin rod 8 can be inserted downward into the positioning structure at the top end of the driving vertical plate 1.

[0039] Obviously, the cylinder 6 can also be replaced by a hydraulic cylinder or an electric push rod, and similar simple deformation methods all fall within the protection scope of the present utility model.

[0040] Specifically, the circular hole 504 is a stepped hole, and a guide sleeve 505 is installed on the bottom hole of the circular hole 504 . The guide sleeve 505 is made of tin bronze, and the locking pin rod 8 is slidably fitted in the guide sleeve 505 .

[0041] The cylinder 6 drives the locking pin rod 8 to be inserted into the positioning structure at the top of the driving vertical plate 1, so as to lock the working position of the adapter block 5. When the cylinder 6 drives the locking pin rod 8 to exit the positioning structure, the adapter block 5 is rotated to enter a working state that is convenient for maintenance and tool changing.

[0042] In a specific embodiment of the present invention, Figures 5 to 7 and Fig. 9As shown, the positioning structure includes a left wear-resistant block 103 and a right wear-resistant sleeve 104, and the left wear-resistant block 103 and the right wear-resistant sleeve 104 are both made of 45# steel quenched and tempered material. The left wear-resistant block 103 is embedded in the top surface of the left drive vertical plate 1, and a long groove 1031 is centrally arranged on the left wear-resistant block 103. The long groove 1031 is opened along the length direction of the knife cross beam 3, and the bottom end of the left lock pin rod 8 is inserted into the long groove 1031. The right wear-resistant sleeve 104 is embedded in the top surface of the right drive vertical plate 1, and a positioning circular hole is opened in the center of the right wear-resistant sleeve 104, and the bottom end of the right lock pin rod 8 is inserted into the positioning circular hole. The gap between the width of the ear groove of the adapter block 5 to accommodate the drive vertical plate 1 and the thickness of the drive vertical plate 1 is not less than 5 mm.

[0043] Specifically, if Figure 5 and Fig. 9 As shown, flat platforms 801 are symmetrically provided at the bottom of the left locking pin rod 8 , and the distance between the two flat platforms 801 matches the width of the long slot 1031 .

[0044] By using the left wear-resistant block 103 and the right wear-resistant sleeve 104 made of wear-resistant materials, the lock pin rod 8 will not be seriously worn out even if it is repeatedly inserted and pulled out, ensuring the positioning accuracy for long-term use; through the coordinated use of the long slot 1031 and the positioning circular hole, even in the normal working process, the knife beam 3 is subjected to the heat transmitted by the cross-cutting knife group 4, causing the knife beam 3 to be thermally deformed, and the knife beam 3 becomes longer, the left lock pin rod 8 can slide in the long slot 1031 to achieve the bridging of the thermal deformation here, and will not get stuck. Through the setting of the flat table 801, the sliding contact area between the flat table 801 and the side wall of the long slot 1031 is large, which reduces the amount of wear and increases the service life.

[0045] In a specific embodiment of the present invention, Figure 3 , Figure 4 and Figure 7 As shown, an oil passage 702 is provided inside the cylindrical pin shaft 7, and a grease nipple 701 is provided at the outer end of the oil passage 702. The cylindrical pin shaft 7 is provided with an annular groove at the shaft section matching with the pin shaft hole 102 at the top of the driving vertical plate 1 and the pin shaft hole 2 501 of the ear groove plate of the driving vertical plate 1, and a radial channel connected to the oil passage 702 is provided at the bottom of the annular groove.

[0046] By providing the grease nipple 701, the oil passage 702 and the annular groove, lubricating grease can be added to the working surface of the rotating pair to avoid dry friction and reduce wear.

[0047] The working principle of the installation structure of the cross-cutting knife for the bag-making machine of the utility model is as follows: when the bag-making machine is operating normally, the cylinder 6 drives the locking pin rod 8 to be inserted into the left wear-resistant block 103 and the right wear-resistant sleeve 104 at the top of the driving vertical plate 1. The adapter block 5 is in a locked state, and the cam drive mechanism 2 drives the driving vertical plate 1 to reciprocate up and down along the linear guide rail. The knife cross beam 3 drives the cross-cutting knife group 4 to complete the horizontal heat sealing and cutting of the plastic film below. During normal operation, even if the knife cross beam 3 is subjected to the heat transferred from the cross-cutting knife group 4, causing the knife cross beam 3 to be thermally deformed and the knife cross beam 3 becomes longer, the left locking pin rod 8 can slide in the long groove 1031 to achieve the bridging of the thermal deformation here, that is, the right end is the positioning end, and the left end is the free end, and no jamming will occur. When the cross-cutting knife group 4 needs to be repaired or replaced, the cylinder 6 drives the locking pin rod 8 to withdraw from the left wear-resistant block 103 and the right wear-resistant sleeve 104, and the operator pulls the knife beam 3 to realize the rotation of the adapter block 5, so that the cross-cutting knife group 4 faces horizontally to one side and enters a working state that is convenient for maintenance and knife changing.

[0048] The utility model bag making machine cross-cutting knife installation structure, by providing an adapter block 5 and a driving vertical plate 1 connected by a pin shaft, can make the cross-cutting knife group 4 face sideways when the cross-cutting knife group 4 needs to be repaired or replaced, only the locking assembly needs to be opened to deflect the entire knife beam 3, so that the cross-cutting knife group 4 can be turned to one side, which is convenient for disassembly and maintenance, and reduces the difficulty of operation; through the setting of the locking assembly, the adapter block 5 and the knife beam 3 can be locked to prevent the cross-cutting knife group 4 from moving during the sealing and cutting process, thereby ensuring stable and normal operation. The utility model bag making machine cross-cutting knife installation structure is convenient for maintenance and overhaul of the cross-cutting knife group, shortens the maintenance and knife changing time, and saves manpower. In addition, the fixed connection of the notch 502 and the end convex head of the knife beam 3 by the bite-fitting cooperation can increase the connection strength between the adapter block 5 and the knife beam 3. By setting the bolt through hole 503 as a waist-shaped hole opened along the length direction of the equipment, the longitudinal installation error of the linear guide rails on both sides can be compensated. After installation, a conical pin is used to pass through the positioning pin hole and a bottom hole is made at the end convex head of the knife cross beam 3, which is convenient for the next assembly after disassembly; by setting the cushion block 9, the thickness of the cushion block 9 is changed, and the bottom edge of the cross-cutting knife group 4 can be leveled to ensure uniform heat sealing marks. The cylinder 6 drives the locking pin rod 8 to insert into the positioning structure at the top of the driving vertical plate 1 to lock the working position of the adapter block 5. When the cylinder 6 drives the locking pin rod 8 to exit the positioning structure, the adapter block 5 is rotated to enter a working state that is convenient for maintenance and knife changing. By using the left wear-resistant block 103 and the right wear-resistant sleeve 104 made of wear-resistant materials, the lock pin rod 8 will not be seriously worn even if it is repeatedly inserted and pulled out, ensuring the positioning accuracy for long-term use; by using the long groove 1031 and the positioning circular hole in combination, even if the knife beam 3 is thermally deformed by the heat transmitted from the cross-cutting knife group 4 during normal operation, the knife beam 3 becomes longer, and the left lock pin rod 8 can slide in the long groove 1031 to achieve the bridging of the thermal deformation here, and will not get stuck. By setting the flat table 801, the sliding contact area between the flat table 801 and the side wall of the long groove 1031 is large, which reduces the amount of wear and increases the service life. By setting the grease nipple 701, the oil channel 702 and the annular groove, lubricating grease can be added to the working surface of the rotating pair to avoid dry friction and reduce wear.

[0049] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0050] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A bag making machine cross-cutting knife installation structure, arranged between a driving vertical plate (1) and a knife cross beam (3), characterized in that: It comprises an adapter block (5), a locking assembly and a cylindrical pin shaft (7); the two adapter blocks (5) are respectively arranged at the two ends of the knife cross beam (3); the inner end of the adapter block (5) is fixedly connected to the end of the knife cross beam (3); the bottom end of the adapter block (5) is rotatably connected to the top end of the driving vertical plate (1) through the cylindrical pin shaft (7); the locking assembly is arranged on the top of the adapter block (5), and the locking assembly can lock the relative position of the adapter block (5) and the driving vertical plate (1).

2. The bag making machine cross-cutting knife installation structure according to claim 1, characterized in that: The inner end surface of the adapter block (5) is provided with a notch (502), and the end boss of the knife cross beam (3) is inserted into the notch (502) and fixed by bolts.

3. The bag making machine cross-cutting knife installation structure according to claim 2 is characterized in that: The adapter block (5) is provided with a bolt through hole (503) and a positioning pin hole on the top plate of the slot (502); a plurality of the bolt through holes (503) are arranged around the positioning pin hole; the bolt through holes (503) are waist-shaped holes and the long side direction of the waist-shaped holes is perpendicular to the knife cross beam (3); a pad (9) is also provided between the end boss of the knife cross beam (3) and the top surface of the slot (502).

4. The bag making machine cross-cutting knife installation structure according to claim 1, characterized in that: The locking assembly comprises a cylinder (6) and a locking pin rod (8); a circular hole (504) is provided on the top of the adapter block (5); the cylinder (6) is mounted on the top surface of the adapter block (5); a piston rod of the cylinder (6) pointing vertically downward passes through the circular hole (504); the locking pin rod (8) is coaxially fixed to the bottom end of the piston rod; and the locking pin rod (8) can extend downward into the positioning structure at the top end of the driving vertical plate (1).

5. The bag making machine cross-cutting knife installation structure according to claim 4, characterized in that: The circular hole (504) is a stepped hole, a guide sleeve (505) is installed on the bottom hole of the circular hole (504), and the locking pin rod (8) is slidably fitted in the guide sleeve (505).

6. The bag making machine cross-cutting knife installation structure according to claim 4 or 5, characterized in that: The positioning structure comprises a left wear-resistant block (103) and a right wear-resistant sleeve (104), wherein the left wear-resistant block (103) is embedded in the top end surface of the left driving vertical plate (1), and a long groove (1031) is centrally arranged on the left wear-resistant block (103), wherein the long groove (1031) is opened along the length direction of the knife cross beam (3), and the bottom end of the left locking pin rod (8) is inserted into the long groove (1031); the right wear-resistant sleeve (104) is embedded in the top end surface of the right driving vertical plate (1), and a positioning circular hole is centrally opened on the right wear-resistant sleeve (104), and the bottom end of the right locking pin rod (8) is inserted into the positioning circular hole; the gap between the width of the ear groove of the adapter block (5) accommodating the driving vertical plate (1) and the thickness of the driving vertical plate (1) is not less than 5 mm.

7. The bag making machine cross-cutting knife installation structure according to claim 6, characterized in that: The bottom of the left locking pin rod (8) is symmetrically provided with flat platforms (801), and the distance between the two flat platforms (801) is adapted to the width of the long slot (1031).

8. The bag making machine cross-cutting knife installation structure according to claim 1, characterized in that: An oil passage (702) is arranged inside the cylindrical pin shaft (7), and a grease nipple (701) is arranged at an outer end of the oil passage (702). The cylindrical pin shaft (7) is provided with annular grooves at shaft sections matching with the first pin shaft hole (102) at the top of the driving vertical plate (1) and the second pin shaft hole (501) of the ear groove plate of the driving vertical plate (1), respectively. A radial hole connected to the oil passage (702) is arranged at the bottom of the annular groove.

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