Winding machine film material stretching device facilitating cover opening and closing

Abstract

The utility model relates to the technical field of packaging winding machines, in particular to a winding machine film material stretching device convenient for opening and closing a cover, which comprises a box body, the box body is provided with a containing cavity with a side opening, the box body is rotatably connected with a box cover, the bottom of the box body is provided with a connecting plate, and the connecting plate is provided with a material frame; when the box body is covered with the box cover, a film outlet is formed between the rotating side of the box cover and the box body, and a film inlet is formed between the opening and closing side of the box cover and the box body. The material frame is arranged close to the film inlet, and a cover opening and closing mechanism and a stretching mechanism are arranged between the box cover and the box body. The cover opening and closing mechanism comprises a locking ring, a pull handle and a rope locking assembly, the locking ring is located in the containing cavity, the pull handle is rotationally connected to the box cover, a connecting rod is arranged on the inner side of the pull handle, the rope locking assembly comprises a fixing base, a horizontal steering wheel, a vertical steering wheel, a spring bolt, a tension spring and a pull rope, the fixing base is provided with a locking block, and a locking groove can be formed between the locking end of the spring bolt and the locking block. The box cover is convenient and labor-saving to open and close, and the box cover is not easy to open accidentally.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging wrapping machines, in particular to a film material stretching device for wrapping machines which is convenient for opening and closing a cover. Background Art

[0002] Among existing patents, the Chinese patent application number 200720052082.X, filed by the applicant on May 29, 2007, discloses a novel film stretching device for a wrapping machine. The device features a rotating frame that can open and close relative to a transmission rod holder. However, if the rotating frame easily opens the transmission rod holder, the cover between the rotating frame and the transmission rod holder is unstable and easily opened accidentally. If the rotating frame and the transmission rod holder are fastened together, the cover is secure, but opening the rotating frame is laborious and can cause significant noise during opening and closing. These drawbacks are significant, and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a film stretching device for a wrapping machine that is convenient for opening and closing a cover.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A film stretching device for a winding machine that is convenient for opening and closing a cover, comprising a box body, a chamber with a side opening provided on the box body, a box cover rotatably connected to one side of the side opening of the box body, the box cover is used to close or open the side opening, a connecting plate is provided at the bottom of the box body, and a material rack is installed on the connecting plate; when the box cover closes the box body, a film outlet is formed between the rotating side of the box cover and the box body, and a film inlet is formed between the opening and closing side of the box cover and the box body; the material rack is arranged near the film inlet, and an opening and closing cover mechanism and a stretching mechanism for stretching the film are provided between the box cover and the box body; the opening and closing cover mechanism comprises a locking ring, a pull handle and a rope locking assembly, the locking ring is installed on the box body and is located in the chamber The handle is rotatably connected to the box cover, and a connecting rod is provided on the inner side of the handle. The rope locking assembly includes a fixed seat mounted on the inner side wall of the box cover, a horizontal steering wheel rotatably connected to the inner side wall of the box cover, a vertical steering wheel rotatably connected to the inner side wall of the box cover, a lock tongue telescopically slidably arranged on the fixed seat, a tension spring elastically connected to the lock tongue and the fixed seat, and a pull rope wound around the horizontal steering wheel and the vertical steering wheel. The two ends of the pull rope are respectively connected to the connecting end of the lock tongue and the connecting rod, and the fixed seat is provided with a locking block. A locking groove can be formed between the locking end of the lock tongue and the locking block. The locking groove is used to clamp with a lock ring, and the tension spring is used to apply a force to the lock tongue to lock it to the lock ring.

[0006] Furthermore, a downward pressing guide surface is provided on the outer side of the locking end of the lock tongue.

[0007] Furthermore, the box cover is provided with a rotation cavity, and the handle is rotatably arranged in the rotation cavity.

[0008] Furthermore, the number of locking rings, the number of rope locking assemblies and the number of connecting rods are all two, the two locking rings, the two rope locking assemblies and the two connecting rods are respectively arranged in a one-to-one correspondence, the two locking rings are respectively arranged at the top and bottom of the box body, the two connecting rods are arranged in parallel, and the two rope locking assemblies are symmetrically arranged on the box cover.

[0009] Furthermore, the fixing seat is provided with a sliding hole, the lock tongue slides through the lock hole, the connecting end of the lock tongue is equipped with a limiting plate, and one end of the tension spring is connected to the limiting plate.

[0010] Furthermore, the stretching mechanism includes a first stretching roller and a first film-winding roller respectively rotatably connected to the cavity, a second stretching roller and a second film-winding roller respectively rotatably connected to the inner side wall of the box cover, a first transmission gear sleeved on the top of the first stretching roller, a second transmission gear sleeved on the top of the second stretching roller, a gear set rotatably arranged on the top of the box body, and a rotating driver installed on the top of the box body and used to drive the gear set to rotate, the first transmission gear and the second transmission gear are respectively engaged with the gear set, the rotation direction of the first stretching roller is opposite to the rotation direction of the second stretching roller, and the diameter of the first transmission gear is larger than the diameter of the second transmission gear; when the box cover is closed with the box body, the second stretching roller is located between the first stretching roller and the first film-winding roller, and the first film-winding roller is located between the second stretching roller and the second film-winding roller; the first stretching roller is arranged near the film inlet, and the second film-winding roller is arranged near the film outlet.

[0011] Furthermore, the cavity is rotatably connected to a film outlet roller, which is located at the film outlet port; the inner side wall of the box cover is rotatably connected to a film feed roller, which is located at the film feed port.

[0012] Furthermore, the downward pressing guide surface is a curved surface or an inclined surface.

[0013] The beneficial effects of the present invention are as follows: in actual application, the film roll is installed on the material rack, the film of the film roll enters the cavity from the film inlet, and passes through the film outlet after winding around the stretching mechanism. The stretching mechanism is used to stretch the moving film. When the box cover is closed over the box body, the locking block extends out of the fixed seat under the elastic force of the tension spring and forms a locking groove with the locking block. The locking ring is clamped in the locking groove to realize the locking of the locking tongue to the locking ring, thereby locking the box cover to the box body; when the box cover needs to be opened, the pull handle is pulled to rotate the pull handle relative to the box cover. The rotating pull handle drives the connecting rod to pull the pull rope, so that the pull rope pulls the lock tongue, causing the lock tongue to retract into the fixed seat to release the lock on the lock ring. At this time, the box cover can be opened to the box body. The present invention is convenient and labor-saving to open and close the box cover, and it is not easy to open the box cover accidentally. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model in the open state.

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model in the open state from another perspective.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model in the closed state.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model in a closed state from another perspective.

[0019] Description of reference numerals:

[0020] 1. Box body; 2. Cavity; 3. Box cover; 4. Connecting plate; 5. Material rack; 6. Film outlet; 7. Film inlet; 8. Lid opening and closing mechanism; 9. Stretching mechanism; 10. Locking ring; 11. Handle; 12. Rope locking assembly; 13. Connecting rod; 14. Fixed seat; 15. Horizontal steering wheel; 16. Vertical steering wheel; 17. Lock tongue; 18. Tension spring; 19. Pull rope; 20. Lock block; 21. Lock groove; 22. Pressing guide surface; 23. Rotating chamber; 24. Limiting plate; 25. First stretching roller; 26. First film winding roller; 27. Second stretching roller; 28. Second film winding roller; 29. ​​First transmission gear; 30. Second transmission gear; 31. Gear set; 32. Rotating drive; 33. Film outlet roller; 34. Film inlet roller. DETAILED DESCRIPTION

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0022] like Figures 1 to 5As shown, the utility model provides a film stretching device for a winding machine that is easy to open and close the cover, which includes a box body 1, the box body 1 is provided with a cavity 2 with a side opening, one side of the side opening of the box body 1 is rotatably connected to a box cover 3, the box cover 3 is used to close or open the side opening, and a connecting plate 4 is provided at the bottom of the box body 1, and the connecting plate 4 is equipped with a material rack 5; when the box cover 3 covers the box body 1, a film outlet 6 is formed between the rotating side of the box cover 3 and the box body 1, and a film inlet 7 is formed between the opening and closing side of the box cover 3 and the box body 1; the material rack 5 is arranged near the film inlet 7, and an opening and closing cover mechanism 8 and a stretching mechanism 9 for stretching the film are provided between the box cover 3 and the box body 1; the opening and closing cover mechanism 8 includes a locking ring 10, a pull handle 11 and a rope locking assembly 12, the locking ring 10 is installed on the box body 1 and is located in the cavity 2, the pull handle 11 is rotated Connected to the box cover 3, a connecting rod 13 is provided on the inner side of the handle 11, and the rope locking assembly 12 includes a fixed seat 14 installed on the inner side wall of the box cover 3, a horizontal steering wheel 15 rotatably connected to the inner side wall of the box cover 3, a vertical steering wheel 16 rotatably connected to the inner side wall of the box cover 3, a locking tongue 17 telescopically slidably arranged on the fixed seat 14, a tension spring 18 elastically connected to the locking tongue 17 and the fixed seat 14, and a pull rope 19 wound around the horizontal steering wheel 15 and the vertical steering wheel 16, the two ends of the pull rope 19 are respectively connected to the connecting end of the locking tongue 17 and the connecting rod 13, the fixed seat 14 is provided with a locking block 20, and a locking groove 21 can be formed between the locking end of the locking tongue 17 and the locking block 20, the locking groove 21 is used to engage with the locking ring 10, and the tension spring 18 is used to apply a force to the locking tongue 17 to lock it to the locking ring 10.

[0023] In actual application, the film roll is installed on the material rack 5. The film of the film roll enters the cavity 2 from the film inlet 7 and passes through the film outlet 6 after winding around the stretching mechanism 9. The stretching mechanism 9 is used to stretch the moving film. When the box cover 3 covers the box body 1, the locking block 20 extends out of the fixed seat 14 under the elastic force of the tension spring 18 and forms a locking groove 21 with the locking block 20. The locking ring 10 is clamped in the locking groove 21 to realize that the locking tongue 17 locks the locking ring 10, thereby locking the box cover 3 on the box body 1. When the box cover 3 needs to be opened, the pull handle 11 is pulled to rotate the pull handle 11 relative to the box cover 3. The rotating pull handle 11 drives the connecting rod 13 to pull the pull rope 19, so that the pull rope 19 pulls the lock tongue 17, causing the lock tongue 17 to retract into the fixed seat 14 to release the lock of the lock ring 10. At this time, the box cover 3 can be opened to the box body 1. The utility model makes opening and closing the box cover 3 convenient and labor-saving, reduces noise generation, and is not easy to accidentally open the box cover 3.

[0024] In this embodiment, a downward-pressing guide surface 22 is provided on the outer side of the locking end of the lock tongue 17. When closing the box lid 3, as the box lid 3 gradually closes the box body 1, the lock ring 10 will contact and apply pressure to the downward-pressing guide surface 22, causing the lock tongue 17 to retract into the fixed seat 14. After the lock ring 10 releases the pressure on the lock tongue 17, the lock tongue 17 will extend out of the fixed seat 14 under the elastic force of the tension spring 18 and form a locking groove 21 with the locking block 20. The lock ring 10 is locked in the locking groove 21, thereby locking the box lid 3 to the box body 1. The provision of the downward-pressing guide surface 22 allows the box lid 3 to be locked to the box body 1 (closing the box lid 3) even without pulling the handle 11.

[0025] In this embodiment, the box cover 3 is provided with a rotation cavity 23, and the handle 11 is rotatably provided in the rotation cavity 23. This structural design makes the structure compact and prevents the entire handle 11 from protruding outside the box cover 3.

[0026] In this embodiment, the number of locking rings 10, the number of rope locking assemblies 12, and the number of connecting rods 13 are all two. The two locking rings 10, the two rope locking assemblies 12, and the two connecting rods 13 are respectively provided in a one-to-one correspondence. The two locking rings 10 are respectively provided at the top and bottom of the box body 1, the two connecting rods 13 are arranged in parallel, and the two rope locking assemblies 12 are symmetrically arranged on the box lid 3. This structural design allows a single pull handle 11 to drive the two rope locking assemblies 12 to operate synchronously. The locking tongues 17 of the two rope locking assemblies 12 respectively lock the two locking rings 10, so that the box lid 3 and the box body 1 can be firmly locked together, and the connection force between the box lid 3 and the box body 1 is uniform.

[0027] In this embodiment, the fixing base 14 is provided with a sliding hole, through which the lock tongue 17 slides. A stop plate 24 is mounted at the connecting end of the lock tongue 17, and one end of the tension spring 18 is connected to the stop plate 24. The provision of the lock hole improves the stability of the lock tongue 17 in its telescopic movement relative to the fixing base 14. When the locking end of the lock tongue 17 extends out of the lock hole of the fixing base 14, the stop plate 24 contacts the fixing base 14 to limit the lock tongue 17 and prevent it from separating from the fixing base 14.

[0028] In this embodiment, the stretching mechanism 9 includes a first stretching roller 25 and a first film-winding roller 26 respectively connected to the chamber 2, a second stretching roller 27 and a second film-winding roller 28 respectively connected to the inner side wall of the box cover 3, a first transmission gear 29 mounted on the top of the first stretching roller 25, a second transmission gear 30 mounted on the top of the second stretching roller 27, a gear set 31 rotatably arranged on the top of the box body 1, and a rotation driver 32 installed on the top of the box body 1 and used to drive the gear set 31 to rotate. The first transmission gear 29 The first stretching roller 25 and the second transmission gear 30 are respectively in driving engagement with the gear set 31. The rotation direction of the first stretching roller 25 is opposite to that of the second stretching roller 27. The diameter of the first transmission gear 29 is larger than that of the second transmission gear 30. When the box cover 3 is closed on the box body 1, the second stretching roller 27 is located between the first stretching roller 25 and the first film winding roller 26, and the first film winding roller 26 is located between the second stretching roller 27 and the second film winding roller 28. The first stretching roller 25 is located near the film inlet 7, and the second film winding roller 28 is located near the film outlet 6. Specifically, the rotation driver 32 can be a motor; the gear set 31 is composed of two gears.

[0029] In actual application, the box cover 3 is opened, and the film of the film roll is passed between the box body 1 and the box cover 3 and output from the film outlet 6. At this time, the box cover 3 is closed on the box body 1, so that the film is S-shaped and passes through the first stretching roller 25, the second stretching roller 27, the first film winding roller 26 and the second film winding roller 28 in sequence. During the movement of the film, the rotation driver 32 drives the first transmission gear 29 and the second transmission gear 30 to rotate via the gear set 31. The rotation direction of the first transmission gear 29 is opposite to the rotation direction of the second transmission gear 30, so that the rotation direction of the first stretching roller 25 is opposite to the rotation direction of the second stretching roller 27. Since the diameter of the first transmission gear 29 is larger than the diameter of the second transmission gear 30, the rotation speed of the first stretching roller 25 is less than the rotation speed of the second stretching roller 27. Under the action of the first stretching roller 25 and the second stretching roller 27, the film is stretched.

[0030] In this embodiment, a film discharge roller 33 is rotatably connected to the chamber 2 and is located at the film discharge port 6. A film feed roller 34 is rotatably connected to the inner side wall of the cover 3 and is located at the film feed port 7. The arrangement of the film discharge roller 33 allows the film to be stably discharged from the film discharge port 6; the arrangement of the film feed roller 34 allows the film to stably enter the chamber 2 through the film feed port 7.

[0031] In this embodiment, the downward pressing guide surface 22 is a curved surface or an inclined surface.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A film stretching device for a wrapping machine that facilitates opening and closing of a cover, characterized in that: The invention comprises a box body (1), wherein the box body (1) is provided with a cavity (2) having a side opening, a box cover (3) is rotatably connected to one side of the side opening of the box body (1), and the box cover (3) is used to close or open the side opening, and a connecting plate (4) is provided at the bottom of the box body (1), and a material rack (5) is installed on the connecting plate (4); when the box cover (3) covers the box body (1), a film outlet (6) is formed between the rotating side of the box cover (3) and the box body (1), and the opening and closing side of the box cover (3) is in contact with the box body. A film inlet (7) is formed between the box body (1); a material rack (5) is arranged near the film inlet (7); an opening and closing cover mechanism (8) and a stretching mechanism (9) for stretching the film are arranged between the box cover (3) and the box body (1); the opening and closing cover mechanism (8) includes a lock ring (10), a pull handle (11) and a rope locking assembly (12); the lock ring (10) is installed on the box body (1) and is located in the cavity (2); the pull handle (11) is rotatably connected to the box cover (3), and the pull handle (11) is connected to the box cover (3). ) is provided with a connecting rod (13) on the inner side of the box cover (3), the rope locking assembly (12) comprises a fixing seat (14) mounted on the inner side wall of the box cover (3), a horizontal steering wheel (15) rotatably connected to the inner side wall of the box cover (3), a vertical steering wheel (16) rotatably connected to the inner side wall of the box cover (3), a locking tongue (17) telescopically slidably provided on the fixing seat (14), a tension spring (18) elastically connected to the locking tongue (17) and the fixing seat (14), and a tension spring (18) wound around the horizontal The pull rope (19) of the steering wheel (15) and the vertical steering wheel (16) has two ends connected to the connecting end of the lock tongue (17) and the connecting rod (13) respectively. The fixing seat (14) is provided with a locking block (20). A locking groove (21) can be formed between the locking end of the lock tongue (17) and the locking block (20). The locking groove (21) is used to be clamped with the lock ring (10). The tension spring (18) is used to apply a force to the lock tongue (17) to lock it to the lock ring (10).

2. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 1, characterized in that: A downward pressing guide surface (22) is provided on the outer side of the locking end of the lock tongue (17).

3. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 1, characterized in that: The box cover (3) is provided with a rotation cavity (23), and the pull handle (11) is rotatably arranged in the rotation cavity (23).

4. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 1, characterized in that: The number of the locking rings (10), the number of the rope locking assemblies (12) and the number of the connecting rods (13) are all two, and the two locking rings (10), the two rope locking assemblies (12) and the two connecting rods (13) are respectively arranged in a one-to-one correspondence. The two locking rings (10) are respectively arranged at the top and bottom of the box body (1), the two connecting rods (13) are arranged in parallel, and the two rope locking assemblies (12) are symmetrically arranged on the box cover (3) from top to bottom.

5. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 1, characterized in that: The fixing seat (14) is provided with a sliding hole, the lock tongue (17) slides through the lock hole, the connection end of the lock tongue (17) is equipped with a limiting plate (24), and one end of the tension spring (18) is connected to the limiting plate (24).

6. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 1, characterized in that: The stretching mechanism (9) includes a first stretching roller (25) and a first film-winding roller (26) which are respectively rotatably connected to the chamber (2), a second stretching roller (27) and a second film-winding roller (28) which are respectively rotatably connected to the inner wall of the box cover (3), a first transmission gear (29) which is sleeved on the top of the first stretching roller (25), a second transmission gear (30) which is sleeved on the top of the second stretching roller (27), a gear set (31) which is rotatably arranged on the top of the box body (1), and a rotation driver (32) which is installed on the top of the box body (1) and is used to drive the gear set (31) to rotate. The movable gear (30) is respectively engaged with the gear set (31); the rotation direction of the first stretching roller (25) is opposite to the rotation direction of the second stretching roller (27); the diameter of the first transmission gear (29) is larger than the diameter of the second transmission gear (30); when the box cover (3) is closed with the box body (1), the second stretching roller (27) is located between the first stretching roller (25) and the first film winding roller (26), and the first film winding roller (26) is located between the second stretching roller (27) and the second film winding roller (28); the first stretching roller (25) is arranged near the film inlet (7), and the second film winding roller (28) is arranged near the film outlet (6).

7. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 6, characterized in that: The cavity (2) is rotatably connected to a film discharge roller (33), which is located at the film discharge port (6); the inner side wall of the box cover (3) is rotatably connected to a film feed roller (34), which is located at the film feed port (7).

8. The film stretching device for a wrapping machine that facilitates opening and closing of a cover according to claim 2, characterized in that: The downward pressure guide surface (22) is a curved surface or an inclined surface.

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