A film locking mechanism

Abstract

The utility model discloses a kind of roll film locking mechanisms, it is related to packaging equipment technical field, including film hanging roller, guiding groove is equipped on film hanging roller, positive and negative screw rod is equipped in film hanging roller interior, floating locking assembly and fixed locking assembly are equipped on positive and negative screw rod, positive and negative screw rod connects pneumatic motor, pneumatic motor drives positive and negative screw rod rotation to make floating locking assembly and fixed locking assembly slide along guiding groove, pneumatic motor connects swivel joint, swivel joint connects pneumatic control valve, pneumatic control valve connects electric control valve, electric control valve and pneumatic control valve are all connected gas source interface, when equipment runs, through electric control valve control pneumatic control valve action, regularly automatically aerate pneumatic motor, to have long lasting and continuously guarantee locking effect's advantage.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, and in particular relates to a film locking mechanism. Background Technology

[0002] In various industries that use films, film roll locking generally employs either an air shaft or a screw. An air shaft expands the roller diameter by manually supplying air, thus locking the film roll. While simple in structure, it requires manual adjustment of the positioning ring to center the film roll width when locking rolls of varying widths, introducing uncertainty and impacting production efficiency. Screw locking, typically using left- or right-hand threads with left- or right-hand nut clamping blocks at both ends, automatically centers and locks the film roll without manual adjustment. However, inconsistent tightening force leads to unpredictable locking effectiveness. Furthermore, over extended operation, thread wear causes the film roll to loosen, reducing the locking effect. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a roll film locking mechanism that can guarantee a long-term and continuous locking effect.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A film roll locking mechanism includes a film-mounting roller with a guide groove. Inside the roller are forward and reverse screws, each equipped with a floating locking component and a fixed locking component. The screws are connected to a pneumatic motor, which drives them to rotate, causing the floating and fixed locking components to slide along the guide groove. The pneumatic motor is connected to a rotary joint, which in turn is connected to a pneumatic control valve. The pneumatic control valve is connected to an electrically controlled valve, both connected to an air source interface. During operation, the electrically controlled valve controls the pneumatic control valve to periodically and automatically supply air to the pneumatic motor, thus ensuring a long-lasting and continuous locking effect.

[0006] As a further improvement to the above technical solution:

[0007] The pneumatic control valve is a pneumatic three-position five-way valve, and the electrically control valve is an electrically control two-position five-way valve. The pneumatic three-position five-way valve is connected to a rotary joint through the first and second channels, connected to a gas source interface through the third channel, and connected to the electrically control two-position five-way valve through the fourth and fifth channels. The electrically control two-position five-way valve is used to move the valve core of the pneumatic three-position five-way valve, allowing gas to enter the first or second channel to achieve a long-term and continuous locking effect.

[0008] The pneumatic control valve is also connected to a manual valve, which is connected to the air source interface. The fourth and fifth channels are connected to the manual valve, which is a manual two-position three-way valve for easy film replacement.

[0009] One end of the film-coating roller is the operating end. The guide groove for guiding the floating locking assembly is located at the operating end. The width of the guide groove at the operating end is smaller than the width of the guide groove for guiding the fixed locking assembly, which facilitates operation and ensures the safety of the operator.

[0010] The floating locking assembly includes a nut seat, a sliding seat on the nut seat, the sliding seat being sleeved on the nut seat, a stepped portion at the end of the nut seat, an elastic element abutting between the stepped portion and the sliding seat, a first positioning portion on the sliding seat, and a second positioning portion on the nut seat. A first connecting rod and a second connecting rod are respectively hinged to the first positioning portion and the second positioning portion. The first connecting rod and the second connecting rod are hinged together and slide along the guide groove to achieve floating locking.

[0011] The sliding seat is provided with multiple first positioning parts, and the nut seat is provided with multiple second positioning parts. A first connecting rod and a second connecting rod are hinged between the first positioning parts and the second positioning parts to ensure the locking effect.

[0012] The fixing and locking assembly includes a nut sleeve and a positioning block fixed on the nut sleeve. The positioning block has a curved surface for avoiding interference with the film roll and preventing damage to the film roll.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model discloses a film-winding locking mechanism, including a film-coating roller with a guide groove. Inside the film-coating roller are forward and reverse screws, each equipped with a floating locking component and a fixed locking component. The forward and reverse screws are connected to a pneumatic motor, which drives the screws to rotate, causing the floating and fixed locking components to slide along the guide groove. The forward and reverse screws are positioned inside the film-coating roller, with only portions of the floating and fixed locking components sliding externally along the guide groove. The mechanism is aesthetically pleasing and compact. Rotation of the forward and reverse screws activates the floating locking mechanism. The clamping and locking components move simultaneously towards or away from each other, thereby achieving automatic centering and locking of the film roll. The pneumatic motor has a large overload capacity, and the gas introduced has a certain degree of flexibility, which can protect the film roll from being pinched or the device from being damaged in case of misoperation. The pneumatic motor is connected to a rotary joint, the rotary joint is connected to a pneumatic control valve, the pneumatic control valve is connected to an electric control valve, and both the electric control valve and the pneumatic control valve are connected to an air source interface. When the equipment is running, the electric control valve controls the pneumatic control valve to automatically supply air to the pneumatic motor at regular intervals, thereby achieving a long-term and continuous locking effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a film locking mechanism according to the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of a film locking mechanism according to the present invention;

[0017] Figure 3 This is a schematic diagram of the floating locking component of a film locking mechanism according to the present invention.

[0018] The reference numerals in the accompanying drawings of this utility model are as follows: 1. Film-coating roller; 2. Guide groove; 21. First guide part; 22. Second guide part; 3. Positive and negative screws; 4. Floating locking assembly; 41. Nut seat; 42. Sliding seat; 43. Step part; 44. Elastic element; 45. First positioning part; 46. Second positioning part; 47. First connecting rod; 48. Second connecting rod; 5. Fixed locking assembly; 51. Nut sleeve; 52. Positioning block; 53. Curved surface; 6. Pneumatic motor; 7. Rotary joint; 8. Pneumatic control valve; 9. Electrical control valve; 10. Air source interface; 11. First channel; 12. Second channel; 13. Third channel; 14. Fourth channel; 15. Fifth channel; 16. Manual valve. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 3 The film roll locking mechanism shown includes a film hanging roller 1, a guide groove 2 on the film hanging roller 1, a positive and negative screw 3 inside the film hanging roller 1, a floating locking component 4 and a fixed locking component 5 on the positive and negative screw 3, the positive and negative screw 3 is connected to a pneumatic motor 6, the pneumatic motor 6 drives the positive and negative screw 3 to rotate so that the floating locking component 4 and the fixed locking component 5 slide along the guide groove 2, the pneumatic motor 6 is connected to a rotary joint 7, the rotary joint 7 is connected to a pneumatic control valve 8, the pneumatic control valve 8 is connected to an electric control valve 9, and both the electric control valve 9 and the pneumatic control valve 8 are connected to an air source interface 10.

[0021] The positive and negative screws 3 are set inside the film-coating roller 1. Only a portion of the floating locking component 4 and the fixed locking component 5 slide externally along the guide groove 2. The design is aesthetically pleasing and compact. By rotating the positive and negative screws 3, the floating locking component 4 and the fixed locking component 5 move simultaneously towards or away from each other, thereby achieving automatic centering and locking of the film roll. The pneumatic motor 6 has a large overload capacity, and the gas introduced has a certain degree of flexibility, which can protect the film roll from being pinched or the device from being damaged in case of misoperation. When the equipment is running, the pneumatic control valve 8 is controlled by the electric control valve 9 to automatically supply air to the pneumatic motor 6 periodically, thereby achieving a long-term and continuous locking effect.

[0022] The pneumatic control valve 8 is a pneumatically controlled three-position five-way valve, and the electrically controlled valve 9 is an electrically controlled two-position five-way valve. The pneumatically controlled three-position five-way valve is connected to the rotary joint 7 through the first channel 11 and the second channel 12, and to the air source interface 10 through the third channel 13. It is connected to the electrically controlled two-position five-way valve through the fourth channel 14 and the fifth channel 15. The electrically controlled two-position five-way valve is used to move the valve core of the pneumatically controlled three-position five-way valve so that gas enters the first channel 11 or the second channel 12. The pneumatic control valve 8 is also connected to the manual valve 16. The manual valve 16 is connected to the air source interface 10, and the fourth channel 14 and the fifth channel 15 are connected to the manual valve 16. The manual valve 16 is a manually controlled two-position three-way valve.

[0023] The rotary joint 7 is connected to the first channel 11 and the second channel 12 respectively, so that the pneumatic motor 6 can rotate forward or reverse to lock or replace the film roll. When the equipment suddenly loses power, the pneumatic motor 6 and the pneumatic valve 8 will not immediately leak air and can maintain the original locking position. When the equipment is running, the equipment is in a powered state, and the electric control valve 9 automatically supplies air to the pneumatic motor 6 at regular intervals to prevent the film roll from shifting during operation due to the slight air leakage of the pneumatic motor itself, and ensure that it is maintained in the locking position for a long time. When it is necessary to replace the film roll, the pneumatic valve 8 is controlled by the manual two-position three-way valve to drive the pneumatic motor 6 to rotate, so as to open or lock the locking component.

[0024] The pneumatic control valve 8 is connected to the rotary joint 7 through the first channel 11 and the second channel 12, and to the air source interface 10 through the third channel 13. It is connected to the electric control valve 9 and the manual valve 16 through the fourth channel 14 and the fifth channel 15. The pneumatic control valve 8 is set as a pneumatically controlled three-position five-way valve, the electric control valve 9 is set as an electrically controlled two-position five-way valve, and the manual valve 16 is set as a manually controlled two-position three-way valve. The manual control valve 16 and the electric control valve 9 are connected to the fourth channel 14 and the fifth channel 15 through a three-way connector, which can reduce equipment costs while ensuring control effect.

[0025] One end of the film-mounting roller 1 is the operating end. The guide groove 2 for guiding the floating locking assembly 4 is located at the operating end. The width of the guide groove 2 at the operating end is smaller than the width of the guide groove 2 for guiding the fixed locking assembly 5. When the film roll needs to be removed, the operator pushes the floating locking assembly 4 into the guide groove 2. Since the width of the guide groove 2 at the operating end is smaller, it avoids the operator's fingers from entering the guide groove 2, ensuring the operator's safety. The fixed locking assembly 5 does not require operation and has a larger groove width, which reduces the processing difficulty of the fixed locking assembly 5 and the guide groove 2, and effectively ensures the guiding function of the guide groove 2 for the fixed locking assembly 5.

[0026] The floating locking assembly 4 includes a nut seat 41, a sliding seat 42 on the nut seat 41, the sliding seat 42 being sleeved on the nut seat 41, a stepped portion 43 at the end of the nut seat 41, an elastic element 44 abutting between the stepped portion 43 and the sliding seat 42, a first positioning portion 45 on the sliding seat 42, a second positioning portion 46 on the nut seat 41, a first connecting rod 47 and a second connecting rod 48 respectively hinged to the first positioning portion 45 and the second positioning portion 46, the first connecting rod 47 and the second connecting rod 48 being hinged together, and the first connecting rod 47 and the second connecting rod 48 sliding along the guide groove 2.

[0027] When the film roll needs to be replaced, the operator grasps the first connecting rod 47 and the second connecting rod 48 and pushes them into the guide groove 2. As the first positioning part 45 and the second positioning part 46 on the sliding seat 42 slide on the nut seat 41 and move away from each other, the floating locking assembly 4 is fully inserted into the film roller 1. At this time, the inner core of the film roll can be pushed to slide along the film roller 1, and moved out from the operating side or a new film roll can be put onto the film roller 1. During the process of pushing the film roll in or out, the inner wall of the inner core of the film roll abuts against the first connecting rod 47 and the second connecting rod 48 to prevent the floating locking assembly 4 from extending out of the guide groove 2. Since the elastic element 44 abuts between the end step part 43 of the sliding seat 42 and the nut seat 41, when the film roll is fully pushed out or pushed in to the set position, the elastic element 44 drives the first positioning part 45 and the second positioning part 46 of the sliding seat 42 to move relative to each other, so that the hinged part of the first connecting rod 47 and the second connecting rod 48 extends out of the guide groove 2 to achieve blocking. During film roll replacement, manual operation of the floating locking assembly 4 will not change the position of the nut seat 41 relative to the positive and negative screws 3. The positive and negative screws 3 need to be rotated by the pneumatic motor 6 to release the locking state. During the rotation of the positive and negative screws 3 controlled by the pneumatic motor 6, the positions of the floating locking assembly 4 and the fixed locking assembly 5 will be changed simultaneously to ensure automatic centering and locking of the film roll.

[0028] The sliding seat 42 is provided with multiple first positioning parts 45, and the nut seat 41 is provided with multiple second positioning parts 46. A first connecting rod 47 and a second connecting rod 48 are hinged between the first positioning parts 45 and the second positioning parts 46. The film roller 1 is provided with guide grooves 2 corresponding to multiple sets of first connecting rods 47 and second connecting rods 48. Multiple sets of connecting rods move in the guide grooves and run stably.

[0029] The fixing and locking assembly 5 includes a nut sleeve 51 and a positioning block 52 fixed on the nut sleeve 51. The positioning block 52 is provided with a curved surface 53 for avoiding interference with the film roll to prevent damage to the film roll.

[0030] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A film winding locking mechanism, characterized in that, The system includes a film-coating roller (1), which has a guide groove (2). The film-coating roller (1) has a positive and negative screw (3) inside. The positive and negative screw (3) has a floating locking assembly (4) and a fixed locking assembly (5). The positive and negative screw (3) is connected to a pneumatic motor (6). The pneumatic motor (6) drives the positive and negative screw (3) to rotate, causing the floating locking assembly (4) and the fixed locking assembly (5) to slide along the guide groove (2). The pneumatic motor (6) is connected to a rotary joint (7). The rotary joint (7) is connected to a pneumatic control valve (8). The pneumatic control valve (8) is connected to an electric control valve (9). Both the electric control valve (9) and the pneumatic control valve (8) are connected to an air source interface (10).

2. The film locking mechanism as described in claim 1, characterized in that, The pneumatic control valve (8) is a pneumatic three-position five-way valve, and the electric control valve (9) is an electric two-position five-way valve. The pneumatic three-position five-way valve is connected to the rotary joint (7) through the first channel (11) and the second channel (12), connected to the gas source interface (10) through the third channel (13), and connected to the electric two-position five-way valve through the fourth channel (14) and the fifth channel (15). The electric two-position five-way valve is used to move the valve core of the pneumatic three-position five-way valve so that gas enters the first channel (11) or the second channel (12).

3. The film locking mechanism as described in claim 2, characterized in that, The pneumatic control valve (8) is also connected to a manual valve (16), which is connected to a gas source interface (10). The fourth channel (14) and the fifth channel (15) are connected to the manual valve (16), which is a manual two-position three-way valve.

4. The film locking mechanism as described in claim 1, characterized in that, One end of the film-coating roller (1) is the operating end, and the guide groove (2) for guiding the floating locking assembly (4) is located at the operating end. The width of the guide groove (2) at the operating end is smaller than the width of the guide groove (2) for guiding the fixed locking assembly (5).

5. The film winding locking mechanism as described in claim 1, characterized in that, The floating locking assembly (4) includes a nut seat (41), a sliding seat (42) on the nut seat (41), the sliding seat (42) being sleeved on the nut seat (41), a stepped portion (43) at the end of the nut seat (41), an elastic element (44) abutting between the stepped portion (43) and the sliding seat (42), a first positioning portion (45) on the sliding seat (42), a second positioning portion (46) on the nut seat (41), a first connecting rod (47) and a second connecting rod (48) respectively hinged to the first positioning portion (45) and the second positioning portion (46), the first connecting rod (47) and the second connecting rod (48) being hinged, and the first connecting rod (47) and the second connecting rod (48) sliding along the guide groove (2).

6. The film winding locking mechanism as described in claim 5, characterized in that, The sliding seat (42) is provided with a plurality of first positioning parts (45), and the nut seat (41) is provided with a plurality of second positioning parts (46). A first connecting rod (47) and a second connecting rod (48) are hinged between the first positioning parts (45) and the second positioning parts (46).

7. The film winding locking mechanism as described in claim 1, characterized in that, The fixing and locking assembly (5) includes a nut sleeve (51) and a positioning block (52) fixed on the nut sleeve (51). The positioning block (52) is provided with a curved surface (53) for avoiding the roll film.

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