Unwinding and folding mechanism of bag making machine

Abstract

The utility model relates to an unreeling and folding mechanism of a bag making machine, an unreeling mechanism comprises a rack, an unreeling assembly and a tension adjusting assembly, the rack comprises side frames and a base, the tension adjusting assembly is arranged above the side frames, the unreeling assembly comprises an adjusting shaft, an adjusting plate and an adjusting mechanism, the adjusting shaft is rotatably connected between the two side frames, and the adjusting plate is arranged above the adjusting mechanism. The outer side wall of the adjusting shaft is sleeved with a shaft rod sleeve, the adjusting plates are arranged on the outer side of the shaft rod sleeve in an annular array structure, the outer side wall of the shaft rod sleeve is connected with the inner walls of the adjusting plates through adjusting mechanisms, the tension adjusting assembly comprises a base and a support, the base is installed above the two side frames, and two installation movable grooves are formed in the support. An adjusting guide roller is arranged in the mounting movable groove, the top end of the base is in threaded connection with a lead screw body, and the bottom end of the lead screw body is connected with the support through a bearing. The distance between the adjusting shaft and the adjusting plate is adjusted through the adjusting mechanism, so that the shaft diameter of the unwinding assembly is changed to adapt to material rolls with different roll diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of bag-making machines, in particular to a unwind and fold mechanism for a bag-making machine. Background Art

[0002] A bag-making machine belongs to equipment for manufacturing various plastic packaging bags, and can realize mass production of plastic packaging bags. Among them, the unwind mechanism is a device for evenly unwinding a film and feeding it into the subsequent fold mechanism, and the fold mechanism is a device for folding a single-layer film into a double-layer film to form a bag body structure. These two mechanisms are also the most basic structures in a bag-making machine.

[0003] When the unwind mechanism is in use, the unwind shaft of the unwind mechanism cannot adjust the coil diameter, and it cannot unwind coils with different coil diameters, reducing the adaptability of the unwind mechanism; secondly, the unwind mechanism is also inconvenient for quickly adjusting the tension. Usually, the machine needs to be shut down, and then the coil at the position with unbalanced tension needs to be tightened or loosened manually, and the operation is relatively complicated. Summary of the Invention

[0004] Aiming at the deficiencies of the above problem points, the utility model provides an unwind and fold mechanism for a bag-making machine.

[0005] The utility model realizes the above object through the following technical solutions: An unwind and fold mechanism for a bag-making machine, including an unwind mechanism and a fold mechanism. The unwind mechanism includes a frame, an unwind assembly arranged on the frame, and a tension adjustment assembly. The frame includes side frames and a base. The side frames are fixedly installed on both sides of the top of the base. The tension adjustment assembly is arranged above the side frames and between the unwind assembly and the fold mechanism. The unwind assembly includes an adjustment shaft, an adjustment plate, and an adjustment mechanism. The adjustment shaft is rotatably connected between the two side frames through bearings. A shaft sleeve is sleeved on the outer side wall of the adjustment shaft, and the shaft sleeve is fixedly connected to the adjustment shaft through bolts. An adjustment plate is arranged on the outer side of the shaft sleeve. There are four adjustment plates in total, and the adjustment plates are arranged in an annular array structure on the outer side of the shaft sleeve. Adjustment grooves are arranged between the adjustment plates. The outer side wall of the shaft sleeve is connected to the inner wall of the adjustment plate through an adjustment mechanism. The tension adjustment assembly includes a base and a bracket. The base is installed above the two side frames. Two installation and movement grooves are opened on the bracket. An adjustment guide roller is arranged inside the installation and movement grooves. The top end of the base is threadedly connected with a screw rod body through a threaded groove, and the bottom end of the screw rod body is connected to the bracket through a bearing.

[0006] Preferably, the adjustment mechanism includes a motor bracket, an electric telescopic rod, a fixing ring, and an adapter plate. The fixing ring is fixedly connected to the adapter plate through bolts, and the inner diameter of the fixing ring is equal to the diameter of the telescopic end of the electric telescopic rod. The top side wall of the adapter plate is arranged in an arc structure.

[0007] Preferably, four sets of the adjusting mechanisms are provided, and each set of the adjusting mechanisms has six. The adjusting mechanisms are arranged in an equally divided structure on the outer side wall of the shaft sleeve, and the adjusting mechanisms are arranged perpendicular to the outer side wall of the shaft sleeve.

[0008] Preferably, the motor bracket on the adjusting mechanism is fixedly connected to the outer side wall of the shaft sleeve by bolts, and the connecting plate on the adjusting mechanism is fixedly connected to the inner side wall of the adjusting plate by welding.

[0009] Preferably, the electric telescopic rod on the adjusting mechanism is fixedly connected to the shaft sleeve through the motor bracket, and the side wall of the telescopic end of the electric telescopic rod is fixedly connected to the connecting plate through a fixing ring.

[0010] Preferably, a plurality of reinforcing rods are further fixed between the two side frames.

[0011] Preferably, the adjusting guide roller is connected to the inside of the installation movable groove through a buffer spring.

[0012] Preferably, a guide rod is fixedly installed at the top of the bracket, and the guide rod is slidably connected to the base through a guide groove.

[0013] Preferably, the folding mechanism includes a triangular folding frame. A triangular folder for folding is provided in the middle of the triangular folding frame. A clamping and feeding roller group for clamping and feeding the material folded by the triangular folder is arranged at the lower end of the triangular folding frame.

[0014] The beneficial effects of the present utility model are:

[0015] By providing the unwinding assembly, the distance between the adjusting shaft and the adjusting plate can be adjusted through the adjusting mechanism, so that the shaft diameter of the unwinding assembly can be changed to adapt to material rolls with different diameters, improving the adaptability of the mechanism.

[0016] 2. By providing the tension adjusting assembly, the tension adjusting assembly can adjust the tension of the conveyed film. By rotating the screw rod body, the screw rod body drives the bracket to move up and down, so that the height of the adjusting guide roller in the bracket changes, thereby being able to adjust the tension of the conveyed film; secondly, it can also play a guiding role. When the film enters the folding mechanism through the unwinding mechanism, by changing the height of the adjusting guide roller, the height of the conveyed film entering the folding mechanism is changed to adapt to different requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the unwinding and folding mechanism of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the unwinding mechanism of the present utility model;

[0019] Figure 3 This is a schematic structural view of the unwind assembly of the present utility model;

[0020] Figure 4 This is a right view of the unwind assembly of the present utility model;

[0021] Figure 5 This is a schematic structural view of the adjustment mechanism of the present utility model;

[0022] Figure 6 This is a schematic structural view of the tension adjustment assembly of the present utility model;

[0023] Figure 7 This is a schematic structural view of the folding mechanism of the present utility model.

[0024] In the figure: 1. Unwind mechanism; 2. Folding mechanism; 21. Triangular folding frame; 22. Triangular folder; 23. Clamping and feeding roller group; 3. Machine frame; 31. Side frame; 32. Base; 4. Unwind assembly; 41. Adjusting shaft; 411. Shaft sleeve; 42. Adjusting plate; 43. Adjustment mechanism; 431. Motor frame; 432. Electric telescopic rod; 433. Fixed ring; 434. Connecting plate; 44. Adjusting groove; 5. Tension adjustment assembly; 51. Base; 52. Bracket; 521. Installation moving groove; 53. Adjusting guide roller; 54. Lead screw body; 55. Buffer spring; 56. Guide rod; 6. Reinforcing rod. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0026] As Figures 1 to 6 shown, the present utility model provides a unwind and folding mechanism for a bag making machine, including an unwind mechanism 1 and a folding mechanism 2. The folding mechanism 2 includes a triangular folding frame 21. A triangular folder 22 for folding is provided in the middle of the triangular folding frame 21. A clamping and feeding roller group 23 for clamping and feeding the material folded by the triangular folder 22 is arranged at the lower end of the triangular folding frame 21. As known to those skilled in the art, the common folding devices on the market usually directly use the triangular folder 22 in the triangular frame 21 to fold the film. The unwind mechanism 1 evenly unfolds the film and feeds it into the folding mechanism 2. The unwind shaft in the unwind mechanism 1 cannot adjust the coil diameter and cannot unwind coils with different coil diameters. Moreover, the unwind mechanism 1 is also inconvenient for tension adjustment, reducing the adaptability.

[0027] In this embodiment, the unwinding mechanism 1 includes a frame 3, an unwinding assembly 4 disposed on the frame 3, and a tension adjusting assembly 5. The frame 3 includes side frames 31 and a base 32. The side frames 31 are fixedly installed on both sides of the top of the base 32. The unwinding assembly 4 includes an adjusting shaft 41, an adjusting plate 42, and an adjusting mechanism 43. The adjusting shaft 41 is rotatably connected between the two side frames 31 through bearings. A shaft sleeve 411 is sleeved on the outer side wall of the adjusting shaft 41, and the shaft sleeve 411 is fixedly connected to the adjusting shaft 41 by bolts. An adjusting plate 42 is disposed on the outer side of the shaft sleeve 411. There are four adjusting plates 42 in total, and the adjusting plates 42 are arranged in an annular array structure on the outer side of the shaft sleeve 411. Adjusting grooves 44 are provided between the adjusting plates 42. The outer side wall of the shaft sleeve 411 is connected to the inner wall of the adjusting plate 42 through the adjusting mechanism 43. The adjusting mechanism 43 includes a motor bracket 431, an electric telescopic rod 432, a fixing ring 433, and a connecting plate 434. The fixing ring 433 is fixedly connected to the connecting plate 434 by bolts, and the inner diameter of the fixing ring 433 is set to be equal to the diameter of the telescopic end of the electric telescopic rod 432. The top side wall of the connecting plate 434 is arranged in an arc structure. There are four groups of the adjusting mechanisms 43 in total, and each group of the adjusting mechanisms has six. The adjusting mechanisms 43 are arranged in an equally divided structure on the outer side wall of the shaft sleeve 411, and the adjusting mechanisms 43 are arranged perpendicular to the outer side wall of the shaft sleeve 411. The motor bracket 431 on the adjusting mechanism 43 is fixedly connected to the outer side wall of the shaft sleeve 411 by bolts, and the connecting plate 434 on the adjusting mechanism 43 is fixedly connected to the inner side wall of the adjusting plate 42 by welding. The electric telescopic rod 432 on the adjusting mechanism 43 is fixedly connected to the shaft sleeve 411 through the motor bracket 431, and the side wall of the telescopic end of the electric telescopic rod 432 is fixedly connected to the connecting plate 434 through the fixing ring 433.

[0028] When it is necessary to adjust the coil diameter, through the provided unwinding assembly 4, the distance between the adjusting shaft 41 and the adjusting plate 42 can be adjusted through the adjusting mechanism 43, so that the shaft diameter of the unwinding assembly 4 can be changed to adapt to the coil materials of different coil diameters. The electric telescopic rod 432 can be used to drive the adjusting plate 42 to extend or retract. The adjusting plates 42 can form a hollow cylinder. By extending the electric telescopic rod 432, the adjusting plate 42 can be driven to expand, that is, the adjusting groove 44 is enlarged. At this time, the distance between the adjusting shaft 41 and the adjusting plate 42 is increased, so that the shaft diameter becomes larger. By retracting the electric telescopic rod 432, the adjusting plate 42 can be driven to retract, that is, the adjusting groove 44 is reduced. At this time, the distance between the adjusting shaft 41 and the adjusting plate 42 is reduced, so that the shaft diameter becomes smaller.

[0029] Moreover, in this embodiment, the tension adjusting assembly 5 is arranged above the side frame 31 and between the unwinding assembly 4 and the folding mechanism 2. The tension adjusting assembly 5 includes a base 51 and a bracket 52. The base 51 is installed above the two side frames 31. There are two installation movable slots 521 formed on the bracket 52. An adjusting guide roller 53 is arranged inside the installation movable slot 521. The top end of the base 51 is threadedly connected with a screw rod body 54 through a threaded groove, and the bottom end of the screw rod body 54 is connected with the bracket 52 through a bearing. The adjusting guide roller 53 is connected with the inside of the installation movable slot 521 through a buffer spring 55. The top end of the bracket 52 is fixedly installed with a guide rod 56, and the guide rod 56 is slidably connected with the base 51 through a guide slot.

[0030] The tension adjusting assembly 5 can adjust the tension of the conveyed film. By rotating the screw rod body 54, the screw rod body 54 drives the bracket 52 to move up and down, so that the height of the adjusting guide roller 53 in the bracket 52 changes, thereby being able to adjust the tension of the conveyed film. Secondly, it can also play a guiding role. When the film enters the folding mechanism 2 through the unwinding mechanism 1, by changing the height of the adjusting guide roller 53, the height of the conveyed film when entering the folding mechanism 2 is changed to adapt to different requirements. Through the setting of the buffer spring 55, it can avoid the phenomenon of film breakage caused by tension adjustment errors, increase the error tolerance rate, and play a buffering role.

[0031] In addition, a plurality of reinforcing rods 6 are also fixed between the two side frames 31.

[0032] The arranged reinforcing rods 6 can increase the stability between the side frames 31 and the fixing property between the side frames 31 and the unwinding assembly 4.

[0033] During use, the electric telescopic rod 432 drives the adjusting plate 42 to extend or retract, so that the distance between the adjusting shaft 41 and the adjusting plate 42 is adjusted, thereby changing the shaft diameter of the unwinding assembly 4 to adapt to different diameters of the material rolls. After adjustment, the material roll is placed. When the film enters the folding mechanism 2 through the unwinding mechanism 1, by changing the height of the adjusting guide roller 53, the height of the conveyed film when entering the folding mechanism 2 is changed. When the tension of the conveyed film needs to be adjusted, by rotating the screw rod body 54, the screw rod body 54 drives the bracket 52 to move up and down, so that the height of the adjusting guide roller 53 in the bracket 52 changes, thereby being able to adjust the tension of the conveyed film.

[0034] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bag making machine unwinding and folding mechanism, comprising an unwinding mechanism (1) and a folding mechanism (2), characterized in that: The unwinding mechanism (1) comprises a frame (3), an unwinding assembly (4) arranged on the frame (3), and a tension adjustment assembly (5); the frame (3) comprises a side frame (31) and a base (32); the side frame (31) is fixedly mounted on both sides of the top of the base (32); the tension adjustment assembly (5) is arranged above the side frame (31) and between the unwinding assembly (4) and the folding mechanism (2); the unwinding assembly (4) comprises an adjustment shaft (41), an adjustment plate (42) and an adjustment mechanism (43); the adjustment shaft (41) is rotatably connected between the two side frames (31) via a bearing; a shaft sleeve (411) is sleeved on the outer side wall of the adjustment shaft (41); the shaft sleeve (411) is fixedly connected to the adjustment shaft (41) via bolts; and a shaft sleeve (411) is arranged on the outer side of the shaft sleeve (411). The adjusting plates (42) are provided with four adjusting plates (42) in total, and the adjusting plates (42) are arranged on the outside of the shaft sleeve (411) in a ring array structure. The adjusting plates (42) are provided with adjusting grooves (44) between each other. The outer wall of the shaft sleeve (411) is connected to the inner wall of the adjusting plate (42) through an adjusting mechanism (43). The tension adjusting component (5) comprises a base (51) and a bracket (52). The base (51) is installed above the two side frames (31). The bracket (52) is provided with two movable installation grooves (521). Adjustment guide rollers (53) are arranged inside the movable installation grooves (521). The top end of the base (51) is threadedly connected to a screw body (54) through a threaded groove, and the bottom end of the screw body (54) is connected to the bracket (52) through a bearing.

2. The unwinding and folding mechanism of a bag making machine according to claim 1, characterized in that: The adjustment mechanism (43) comprises a motor frame (431), an electric telescopic rod (432), a fixing ring (433) and a connecting plate (434); the fixing ring (433) is fixedly connected to the connecting plate (434) by bolts, and the inner diameter of the fixing ring (433) is set to be equal to the diameter of the telescopic end of the electric telescopic rod (432); and the top side wall of the connecting plate (434) is set to be an arc-shaped structure.

3. The unwinding and folding mechanism of a bag making machine according to claim 2, characterized in that: Four groups of the adjustment mechanisms (43) are provided, and each group of the adjustment mechanisms (43) is provided with six adjustment mechanisms (43). The adjustment mechanisms (43) are arranged on the outer side wall of the shaft sleeve (411) in an equally divided structure, and the adjustment mechanisms (43) and the outer side wall of the shaft sleeve (411) are arranged in a vertical structure.

4. The unwinding and folding mechanism of a bag making machine according to claim 3, characterized in that: The motor frame (431) on the adjustment mechanism (43) is fixedly connected to the outer side wall of the shaft sleeve (411) by means of bolts, and the connecting plate (434) on the adjustment mechanism (43) is fixedly connected to the inner side wall of the adjustment plate (42) by means of welding.

5. The unwinding and folding mechanism of a bag making machine according to claim 4, characterized in that: The electric telescopic rod (432) on the adjustment mechanism (43) is fixedly connected to the shaft rod sleeve (411) via the motor frame (431), and the side wall of the telescopic end of the electric telescopic rod (432) is fixedly connected to the connecting plate (434) via the fixing ring (433).

6. The unwinding and folding mechanism of a bag making machine according to claim 1, characterized in that: A plurality of reinforcing rods (6) are also fixed between the two side frames (31).

7. The unwinding and folding mechanism of a bag making machine according to claim 1, characterized in that: The adjusting guide roller (53) is connected to the interior of the mounting movable groove (521) via a buffer spring (55).

8. The unwinding and folding mechanism of a bag making machine according to claim 1, characterized in that: A guide rod (56) is fixedly mounted on the top end of the bracket (52), and the guide rod (56) is slidably connected to the base (51) via a guide groove.

9. The unwinding and folding mechanism of a bag making machine according to claim 1, characterized in that: The folding mechanism (2) comprises a triangular folding frame (21), a triangular folding device (22) for folding is provided in the middle of the triangular folding frame (21), and a clamping and feeding roller group (23) for clamping and feeding the material folded by the triangular folding device (22) is provided at the lower end of the triangular folding frame (21).

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