A bag making machine with a hemming mechanism

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By designing adjustment and folding mechanisms on the bag-making machine, flexible adjustment of the paper bag width and stable fixing of the paper are achieved, solving the problem of insufficient equipment applicability in existing technologies and improving production efficiency and product quality.

CN224490286UActive Publication Date: 2026-07-14DINGMAO MASCH (HUAIAN) CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: DINGMAO MASCH (HUAIAN) CO LTD
Filing Date: 2025-08-14
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

The folding mechanism used in existing bag making machines has a fixed structure and cannot adapt to the production of paper bags of different sizes or shapes, resulting in complicated production adjustments and increased labor costs and product defect rates.

Method used

A bag-making machine including an adjustment mechanism and a folding mechanism was designed. The width of the paper bag can be adjusted by a combination of a rotating rod, a fixed slide rail, a connecting rod, a stop plate and a belt shifting block. The paper is fixed and stable during the folding process by the cooperation of a clamping plate and a rotating disk.

Benefits of technology

It has expanded the applicability of the equipment, simplified production adjustments, reduced labor costs, and improved production efficiency and product quality.

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Abstract

The utility model is suitable for making bag machine equipment technical field provides a kind of edge folding mechanism for making bag machine, including equipment main body, equipment main body includes work bench and fixed support;Adjusting mechanism, adjusting mechanism includes rotating rod, fixed slide rail, connecting rod, abutment plate and with shift block, with shift block is connected with the thread of rotating rod both ends respectively, connecting rod is rotatably connected with with shift block, connecting rod other end is rotatably connected with abutment plate, with shift block is set in fixed slide rail, rotating rod both ends are rotatably connected in fixed slide rail respectively;In the utility model, rotating rod rotates around itself axial, with shift block moves along fixed slide rail towards or away, the included angle between connecting rod and rotating rod changes, so that the distance between abutment plate rotatably connected with connecting rod also changes, can adjust the width of paper bag according to actual production demand, expand the applicability range of equipment.

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Description

Technical Field

[0001] This utility model belongs to the technical field of bag making machine equipment, and in particular relates to a folding mechanism for a bag making machine. Background Technology

[0002] A bag-making machine is an automated equipment with multiple machines working together and multiple workstations. It is mainly used to process roll films that have been processed through printing, lamination, slitting, and cutting into packaging bags of various shapes using longitudinal and transverse technologies.

[0003] However, the structural dimensions of the folding mechanism used in existing bag making machines are usually fixed, so it can only fold the edges of paper bags of a certain size. Once it is necessary to produce paper bags of different sizes or shapes, the folding mechanism must be replaced or mechanical adjustments must be made. This not only increases labor costs, but also easily leads to an increase in product defect rate due to adjustment errors. Therefore, a folding mechanism for bag making machines is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a folding mechanism for a bag making machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A folding mechanism for a bag making machine, comprising:

[0007] The equipment body includes a workbench and a fixed frame, with the fixed frame fixedly installed on the upper surface of the workbench.

[0008] An adjusting mechanism includes a rotating rod, a pair of fixed slide rails, multiple pairs of connecting rods, two pairs of abutment plates, and a pair of shifting blocks. Each pair of abutment plates is spaced a predetermined distance apart. The rotating rod has a pair of opposing threads. Each pair of shifting blocks is threaded to both ends of the rotating rod. One end of each pair of connecting rods is rotatably connected to both of them and to the shifting blocks. The abutment plates are movably connected to the fixed slide rails. The other end of one connecting rod in each pair is rotatably connected to one abutment plate in each pair. The shifting blocks are slidably mounted on the fixed slide rails. Both ends of the rotating rod are rotatably connected to a pair of fixed slide rails. The rotating rod is rotatably mounted on a fixed frame, and the fixed slide rails are fixedly mounted on the fixed frame.

[0009] A folding mechanism is mounted on the fixed frame.

[0010] In a further technical solution, the adjustment mechanism further includes a pair of pulleys, a transmission belt, and a motor. The transmission belt is connected to the pair of pulleys, the rotating rod is inserted into one of the pulleys, the other pulley is rotatably mounted on the fixed frame, the output shaft of the motor is connected to the other pulley, and the motor is mounted on the fixed frame.

[0011] In a further technical solution, the opposite side walls of the moving block each have a fixed post, and one end of each pair of connecting rods that are rotatably connected to each other is inserted into the fixed post.

[0012] In a further technical solution, the workbench has a pair of oppositely arranged sliding grooves, and the main body of the equipment also includes a pair of oppositely arranged clamping plates, the lower ends of the clamping plates being slidably placed in the sliding grooves, and the pair of clamping plates being symmetrically distributed about the rotating rod.

[0013] In a further technical solution, the lower end of the clamping plate has a sliding column, the main body of the equipment also includes a rotating disk, the rotating disk has a pair of circumferentially distributed moving grooves, the pair of sliding columns are respectively slidably placed in the moving grooves, and the rotating disk is rotatably mounted on the lower end face of the workbench.

[0014] In a further technical solution, the circumferential sidewall of the rotating disk has multiple spaced serrated grooves, the main body of the equipment also includes a mounting column, a spring and positioning serrations, the two ends of the spring are connected to the positioning serrations and the ends of the mounting column, the positioning serrations are engaged with the serrated grooves, and the mounting column is fixedly installed on the lower end face of the workbench.

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

[0016] This invention features an adjustment mechanism comprising a rotating rod, a fixed slide rail, a connecting rod, two pairs of abutment plates, and a shifting block. The shifting block is threadedly connected to both ends of the rotating rod, the connecting rod is rotatably connected to the shifting block, and the other end of the connecting rod is rotatably connected to the abutment plate. The shifting block is mounted on the fixed slide rail, and both ends of the rotating rod are rotatably connected to the fixed slide rail. The rotating rod is rotatably mounted on a fixed frame, and the fixed slide rail is fixedly mounted on the fixed frame. As the rotating rod rotates around its own axis, the shifting blocks move along the fixed slide rail in opposite directions, changing the angle between the connecting rod and the rotating rod. This changes the distance between the abutment plates rotatably connected to the connecting rod, allowing the width of the paper bag to be adjusted according to actual production needs, thus expanding the applicability of the equipment.

[0017] This invention features a clamping plate with its lower end slidably positioned in a groove. The lower end of the clamping plate has a sliding column. The main body of the device also includes a rotating disk with a moving groove, where the sliding column is slidably positioned. The rotating disk has multiple spaced sawtooth grooves. The main body of the device also includes a mounting column, a spring, and positioning sawtooths. The two ends of the spring are connected to the positioning sawtooths and the ends of the mounting column, and the positioning sawtooths are engaged in the sawtooth grooves. The worker places the paper to be folded between a pair of clamping plates and then rotates the rotating disk, causing the sliding column to slide along the moving groove. This causes the pair of clamping plates to move along the groove and towards each other until the pair of clamping plates clamp the paper in the center. During the rotation of the rotating disk, the worker pulls the positioning sawtooths to disengage them from the sawtooth grooves, at which point the spring is stretched. After the rotating disk has finished rotating, the worker releases the positioning sawtooths, and then, under the elastic force of the spring, the positioning sawtooths are engaged in one of the sawtooth grooves, keeping the rotating disk stationary relative to the worktable. This ensures that the paper remains stationary during the folding process, further ensuring the smooth progress of the folding process.

[0018] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the adjustment mechanism of this utility model;

[0021] Figure 3 This is a partial exploded view of the main body of the device of this utility model.

[0022] In the diagram: 1. Main body of the equipment; 11. Workbench; 111. Slide groove; 12. Fixed frame; 13. Clamping plate; 131. Sliding column; 14. Rotating disk; 141. Moving groove; 142. Serrated groove; 15. Mounting column; 16. Spring; 17. Positioning serration; 2. Adjustment mechanism; 21. Rotating rod; 22. Fixed slide rail; 23. Connecting rod; 24. Abutment plate; 25. Belt moving block; 251. Fixed column; 26. Pulley; 27. Transmission belt; 28. Motor; 3. Folding mechanism. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] like Figures 1 to 3 As shown, this utility model embodiment provides a folding mechanism for a bag making machine, including:

[0026] The equipment body 1 includes a workbench 11 and a fixed frame 12, with the fixed frame 12 fixedly installed on the upper surface of the workbench 11.

[0027] Adjustment mechanism 2 includes a rotating rod 21, a pair of fixed slide rails 22, multiple pairs of connecting rods 23, two pairs of abutment plates 24, and a pair of moving blocks 25. Each pair of abutment plates 24 is spaced apart by a predetermined distance. The rotating rod 21 is provided with a pair of opposing threads. The pair of moving blocks 25 are respectively connected to the threads at both ends of the rotating rod 21. One end of each pair of connecting rods 23 is rotatably connected to each other and rotatably connected to the moving blocks 25. The other end of one of the connecting rods 23 in each pair is rotatably connected to one of the abutment plates 24 in each pair. The abutment plates 24 are movably connected to the fixed slide rails 22. The moving blocks 25 are slidably disposed on the fixed slide rails 22. Both ends of the rotating rod 21 are rotatably connected to a pair of fixed slide rails 22. The rotating rod 21 is rotatably mounted on a fixed frame 12. The fixed slide rails 22 are fixedly mounted on the fixed frame 12.

[0028] Folding mechanism 3 is mounted on fixed frame 12;

[0029] In this embodiment, the rotating rod 21 rotates around its own axis, thereby driving a pair of moving blocks 25 threadedly connected to the rotating rod 21 to move towards or away from each other along the fixed slide rail 22; as the moving blocks 25 move, the included angle between the connecting rod 23 and the rotating rod 21 changes, so that the distance between the pair of abutment plates 24 rotatably connected to the pair of connecting rods 23 also changes; in this way, by setting the connecting rod 23 and the rotating rod 21, the width of the paper bag can be adjusted according to the actual production needs, expanding the applicability range of the equipment;

[0030] Specifically, the adjustment mechanism 2 also includes a pair of pulleys 26, a transmission belt 27 and a motor 28. The transmission belt 27 is connected to the pair of pulleys 26, the rotating rod 21 is inserted into one of the pulleys 26, the other pulley 26 is rotatably mounted on the fixed frame 12, the output shaft of the motor 28 is connected to the other pulley 26, and the motor 28 is mounted on the fixed frame 12.

[0031] In this embodiment, after the motor 28 is started, it drives one of the pulleys 26 to rotate. Through the transmission belt 27, the other pulley 26 also rotates synchronously, causing the rotating rod 21 to rotate around its own axis.

[0032] Specifically, the opposite side walls of the moving block 25 each have a fixed post 251, and one end of each pair of connecting rods 23 that are rotatably connected to each other is inserted into the fixed post 251.

[0033] Specifically, the workbench 11 has a pair of oppositely arranged slide grooves 111, and the main body of the equipment 1 also includes a pair of oppositely arranged clamping plates 13, the lower ends of the clamping plates 13 are slidably placed in the slide grooves 111, and the pair of clamping plates 13 are symmetrically distributed about the rotating rod 21.

[0034] Specifically, the clamping plate 13 has a sliding column 131 at its lower end, and the main body of the equipment 1 also includes a rotating disk 14. The rotating disk 14 has a pair of circumferentially distributed moving grooves 141, and the pair of sliding columns 131 are slidably placed in the moving grooves 141. The rotating disk 14 is rotatably mounted on the lower end face of the workbench 11.

[0035] In this embodiment, the worker places the paper to be folded between a pair of clamping plates 13, and then rotates the rotating disk 14, which in turn drives the sliding column 131 to slide along the moving groove 141, so that the pair of clamping plates 13 move along the sliding groove 111 and move towards each other until the pair of clamping plates 13 clamp the paper in the center; by setting a pair of clamping plates 13, the paper is fixed and always located in the middle position of the worktable 11, ensuring the smooth progress of the folding process;

[0036] Specifically, the circumferential sidewall of the rotating disk 14 has a plurality of spaced sawtooth grooves 142, and the main body of the equipment 1 also includes a mounting column 15, a spring 16 and a positioning sawtooth 17. The two ends of the spring 16 are connected to the positioning sawtooth 17 and the ends of the mounting column 15. The positioning sawtooth 17 is engaged with the sawtooth groove 142, and the mounting column 15 is fixedly installed on the lower end face of the workbench 11.

[0037] In this embodiment, during the rotation of the turntable 14, the worker pulls the positioning saw tooth 17 to disengage it from the saw tooth groove 142, at which time the spring 16 is stretched; after the turntable 14 has finished rotating, the worker releases the positioning saw tooth 17, and then under the elastic force of the spring 16, the positioning saw tooth 17 is driven to engage with one of the saw tooth grooves 142; by setting the positioning saw tooth 17, the turntable 14, after rotation, remains stationary relative to the worktable 11, thereby ensuring that the paper also remains stationary during the folding process, further ensuring the smooth progress of the folding process.

[0038] The working principle of this utility model is as follows:

[0039] In use, the worker places the paper to be folded between a pair of clamping plates 13, and then rotates the rotating disk 14, which in turn drives the sliding column 131 to slide along the moving groove 141, so that the pair of clamping plates 13 move along the sliding groove 111 and move towards each other until the pair of clamping plates 13 clamp the paper in the center; by setting a pair of clamping plates 13, the paper is fixed and always located in the middle position of the worktable 11, ensuring the smooth progress of the folding process;

[0040] During the rotation of the turntable 14, the worker pulls the positioning saw tooth 17 to disengage it from the saw tooth groove 142, at which time the spring 16 is stretched. After the turntable 14 has finished rotating, the worker releases the positioning saw tooth 17, and then, under the elastic force of the spring 16, the positioning saw tooth 17 is driven to engage with one of the saw tooth grooves 142. By setting the positioning saw tooth 17, the turntable 14, after rotation, remains stationary relative to the worktable 11, thereby ensuring that the paper also remains stationary during the folding process, further ensuring the smooth progress of the folding process.

[0041] After the paper is fixed, the motor 28 drives one of the pulleys 26 to rotate. Through the transmission belt 27, the other pulley 26 also rotates synchronously, causing the rotating rod 21 to rotate around its own axis, thereby driving a pair of sliding blocks 25 threadedly connected to the rotating rod 21 to move in opposite directions or away from each other along the fixed slide rail 22.

[0042] As the moving block 25 moves, the angle between the connecting rod 23 and the rotating rod 21 changes, which in turn changes the distance between the pair of abutment plates 24 that are rotatably connected to the pair of connecting rods 23 respectively. In this way, by setting the connecting rod 23 and the rotating rod 21, the width of the paper bag can be adjusted according to the actual production needs, thus expanding the applicability of the equipment.

[0043] Finally, after the distance between each pair of abutment plates 24 is adjusted, the folding mechanism 3 folds the paper. During this process, the paper remains in contact with the abutment plates 24 to ensure the quality of the folding.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A folding mechanism for a bag-making machine, characterized in that, include: The equipment body (1) includes a workbench (11) and a fixed frame (12), and the fixed frame (12) is fixedly installed on the upper surface of the workbench (11); The adjusting mechanism (2) includes a rotating rod (21), a pair of fixed slide rails (22), multiple pairs of connecting rods (23), two pairs of abutment plates (24), and a pair of moving blocks (25). Each pair of abutment plates (24) is spaced apart by a predetermined distance. The rotating rod (21) is provided with a pair of opposing threads. The pair of moving blocks (25) are respectively connected to the threads at both ends of the rotating rod (21). One end of each pair of connecting rods (23) is rotatably connected to each other. The abutment plates (24) are movably connected to the... A fixed slide rail (22) is rotatably connected to the belt shift block (25). The other end of one of the connecting rods (23) in each pair is rotatably connected to one of the abutting plates (24) in each pair. The belt shift block (25) is slidably disposed on the fixed slide rail (22). The two ends of the rotating rod (21) are rotatably connected to a pair of fixed slide rails (22). The rotating rod (21) is rotatably mounted on the fixed frame (12). The fixed slide rail (22) is fixedly mounted on the fixed frame (12). A folding mechanism (3) is mounted on the fixing frame (12).

2. The folding mechanism for a bag-making machine according to claim 1, characterized in that: The adjustment mechanism (2) further includes a pair of pulleys (26), a transmission belt (27) and a motor (28). The transmission belt (27) is connected to the pair of pulleys (26). The rotating rod (21) is inserted into one of the pulleys (26). The other pulley (26) is rotatably mounted on the fixed frame (12). The output shaft of the motor (28) is connected to the other pulley (26). The motor (28) is mounted on the fixed frame (12).

3. The folding mechanism for a bag-making machine according to claim 2, characterized in that: The opposite side walls of the moving block (25) each have a fixed post (251), and one end of each pair of connecting rods (23) that are rotatably connected to each other is inserted into the fixed post (251).

4. The folding mechanism for a bag-making machine according to claim 3, characterized in that: The workbench (11) has a pair of oppositely arranged slide grooves (111), and the main body of the equipment (1) also includes a pair of oppositely arranged clamping plates (13). The lower ends of the clamping plates (13) are slidably placed in the slide grooves (111), and the pair of clamping plates (13) are symmetrically distributed about the rotating rod (21).

5. The folding mechanism for a bag-making machine according to claim 4, characterized in that: The clamping plate (13) has a sliding column (131) at its lower end. The main body of the equipment (1) also includes a rotating disk (14). The rotating disk (14) has a pair of circumferentially distributed moving grooves (141). The pair of sliding columns (131) are slidably placed in the moving grooves (141). The rotating disk (14) is rotatably mounted on the lower end face of the workbench (11).

6. The folding mechanism for a bag-making machine according to claim 5, characterized in that: The circumferential sidewall of the rotating disk (14) has a plurality of spaced sawtooth grooves (142). The main body of the equipment (1) also includes a mounting column (15), a spring (16) and a positioning sawtooth (17). The two ends of the spring (16) are connected to the positioning sawtooth (17) and the end of the mounting column (15). The positioning sawtooth (17) is engaged with the sawtooth groove (142). The mounting column (15) is fixedly installed on the lower end face of the workbench (11).