Film guide frame with automatic braking function for packaging machine

Abstract

The utility model provides a film guide frame with an automatic braking function for a packaging machine, which comprises a frame body, an air expansion shaft rotatably arranged on the frame body, a packaging film arranged on the air expansion shaft, a film guide mechanism and a braking mechanism respectively rotatably arranged on the frame body, and the braking mechanism is in separable contact with the air expansion shaft. The packaging film bypasses the film guide mechanism and the brake mechanism and is connected with a film drawing motor; the brake mechanism comprises a rotating shaft rotationally arranged on the frame body, a swing frame connected to the side portion of the rotating shaft, a passing roller rotationally arranged on the swing frame, a brake assembly arranged at one end of the rotating shaft and a torsional spring with one end connected with the other end of the rotating shaft, and the other end of the torsional spring is connected with the frame body. According to the film guiding frame with the automatic braking function for the packaging machine, the tension of a packaging film is overcome through torsion generated by the torsion spring to drive the braking mechanism to act, the air expansion shaft can automatically generate the braking effect, and the braking mechanism is of a pure mechanical structure, simple in structure and better in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machines, in particular to a film guiding frame for a packaging machine with an automatic braking function. Background Art

[0002] The film guiding frame is a mechanism in a packaging machine for conveying packaging films. The purpose is to convey the packaging film on the air shaft film roll to the packaging mechanism through a film pulling motor for packaging. In order to ensure that the packaging film during conveying is always in a tensioned state, at the moment when the packaging film stops conveying, a braking mechanism is often used to prevent the air shaft from continuing to roll and causing the packaging film to loosen. Currently, it is mostly to use a sensor to cooperate with a driving mechanism such as a cylinder or a motor to drive a brake pad to brake the air shaft.

[0003] However, for the braking mechanism in the existing film guiding frame, an additional power output device such as a motor or a cylinder needs to be configured to provide braking power. It not only has a complex structure and poor reliability, but also increases the production cost. This solution aims to solve this technical problem. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a film guiding frame for a packaging machine with an automatic braking function. The pulling force generated by the packaging film drives the swing frame of the braking mechanism to swing against the torsion of the torsion spring, and then drives the brake assembly to move through a rotating shaft, so that the brake pad is separated from or in contact with the brake disc, thereby achieving the effect that the air shaft can automatically brake after the film pulling motor stops. The braking mechanism is a pure mechanical structure, without the need to configure a power output device such as a motor or a cylinder, with a simple structure, better reliability, and reduced production cost at the same time.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a film guiding frame for a packaging machine with an automatic braking function, including a frame body, an air shaft rotatably arranged on the frame body, a packaging film is arranged on the air shaft, and further includes a film guiding mechanism and a braking mechanism respectively rotatably arranged on the frame body. The braking mechanism is in separable contact with the air shaft. The packaging film bypasses the film guiding mechanism and the braking mechanism and is connected with a film pulling motor;

[0006] The braking mechanism includes a rotating shaft rotatably arranged on the frame body, a swing frame connected to the side of the rotating shaft, a through roller rotatably arranged on the swing frame, a brake assembly arranged at one end of the rotating shaft, and a torsion spring with one end connected to the other end of the rotating shaft, and the other end of the torsion spring is connected to the frame body. The brake assembly is in separable contact with the air shaft. The packaging film is arranged bypassing the through roller.

[0007] The braking assembly includes a support unit with one end connected to the end of the rotating shaft, and a swing block swingably arranged at the end position of the air shaft. The other end of the support unit is hinged to one end of the swing block. A brake disc is coaxially arranged at the end of the air shaft, and a brake pad for braking the brake disc is arranged on the swing block.

[0008] The support unit includes a swing arm with one end connected to the rotating shaft, and a connecting rod adjustably arranged at the other end of the swing arm. The other end of the connecting rod is hinged to the swing block.

[0009] The passing roller includes a first roller shaft and a second roller shaft rotatably arranged on the swing frame from top to bottom. The film guiding mechanism includes a first roller group, a second roller group, and a third roller group sequentially arranged on the frame body. The packaging film sequentially bypasses the first roller group, the second roller group, the third roller group and then is connected to the film pulling motor.

[0010] The first roller group includes a first film guiding roller, a second film guiding roller, and a third film guiding roller sequentially arranged between the passing roller and the air shaft from bottom to top. The packaging film is sequentially arranged bypassing the first film guiding roller, the second film guiding roller, the first roller shaft, the third film guiding roller, and the second roller shaft.

[0011] The second roller group includes a fourth film guiding roller, a fifth film guiding roller, a sixth film guiding roller, and a seventh film guiding roller sequentially arranged at one end of the frame body. The packaging film passing through the second roller shaft sequentially passes through the fourth film guiding roller, the fifth film guiding roller, the sixth film guiding roller, and the seventh film guiding roller.

[0012] The third roller group includes an eighth film guiding roller, a ninth film guiding roller, and a tenth film guiding roller sequentially arranged at the other end of the frame body. The packaging film passing through the seventh roller shaft sequentially passes through the eighth film guiding roller, the ninth film guiding roller, and the tenth film guiding roller and then is connected to the film pulling motor.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] (1) The pulling force generated by the packaging film drives the swing frame of the braking mechanism to swing against the torsion of the torsion spring, and then drives the braking assembly to move through the rotating shaft, so that the brake pad is separated from or contacts the brake disc, thereby achieving the effect that the air shaft can automatically brake after the film pulling motor stops. The braking mechanism is a pure mechanical structure, without the need to configure power output devices such as motors or cylinders, with a simple structure, better reliability, and reduced production costs at the same time.

[0015] (2) By adjusting the length of the connecting rod on the swing arm, the braking force of the brake pad can be adjusted, avoiding insufficient braking force or excessive pulling force on the packaging film, so that the braking of the air shaft is more stable and reliable. Description of the Drawings

[0016] Figure 1It is a schematic diagram of the overall structure of the present utility model.

[0017] Figure 2 It is a schematic diagram of the structure of the braking mechanism of the present utility model Figure 1 。

[0018] Figure 3 It is a schematic diagram of the structure of the braking mechanism of the present utility model Figure 2 。

[0019] Figure 4 It is a schematic diagram of the vertical sectional structure of the present utility model.

[0020] Among them, in the figure: 1. Frame body; 2. Air shaft; 3. Packaging film; 4. Braking mechanism; 41. Rotating shaft; 42. Swing frame; 43. Braking assembly; 431. Support unit; 4311. Swing arm; 4312. Connecting rod; 432. Swing block; 433. Brake pad; 44. Torsion spring; 45. Passing roller; 451. Roller shaft 1; 452. Roller shaft 2; 51. Roller group 1; 511. Film guiding roller 1; 512. Film guiding roller 2; 513. Film guiding roller 3; 52. Roller group 2; 521. Film guiding roller 4; 522. Film guiding roller 5; 523. Film guiding roller; 524. Film guiding roller 7; 53. Roller group 3; 531. Film guiding roller 8; 532. Film guiding roller 9; 533. Film guiding roller 10; 6. Brake disc. Specific implementation mode

[0021] In order to more clearly illustrate the technical characteristics of the present solution, the present solution will be elaborated below through specific implementation modes.

[0022] See Figures 1 - 4 , a film guiding frame for a packaging machine with an automatic braking function, comprising a frame body 1, an air shaft 2 rotatably arranged on the frame body 1, a packaging film 3 arranged on the air shaft 2, and further comprising a film guiding mechanism and a braking mechanism 4 respectively rotatably arranged on the frame body 1, the braking mechanism 4 being in separable contact with the air shaft 2, the packaging film 3 bypassing the film guiding mechanism and the braking mechanism 4 and being connected with a film pulling motor, the film pulling motor serving to pull the packaging film 3, which is implemented by the prior art and not shown in the drawings;

[0023] The braking mechanism 4 comprises a rotating shaft 41 rotatably arranged on the frame body 1, a swing frame 42 connected to the side of the rotating shaft 41, a passing roller 45 rotatably arranged on the swing frame 42, a braking assembly 43 arranged at one end of the rotating shaft 41, and a torsion spring 44 with one end connected to the other end of the rotating shaft 41, the other end of the torsion spring 44 being connected to the frame body 1, the braking assembly 43 being in separable contact with the air shaft 2, and the packaging film 3 being arranged to bypass the passing roller 45.

[0024] The brake assembly 43 includes a support unit 431 with one end connected to the end of the rotating shaft 41, and a swing block 432 swingably arranged at the end of the air shaft 2. The other end of the support unit 431 is hinged to one end of the swing block 432. A brake disc 6 is coaxially arranged at the end of the air shaft 2, and a brake pad 433 for braking the brake disc 6 is arranged on the swing block 432.

[0025] The support unit 431 includes a swing arm 4311 with one end connected to the rotating shaft 41, and a connecting rod 4312 adjustably arranged at the other end of the swing arm 4311. The other end of the connecting rod 4312 is hinged to the swing block 432.

[0026] The passing roller 45 includes a first roller shaft 45 and a second roller shaft 46 rotatably arranged on the swing frame 42 from top to bottom. The film guiding mechanism includes a first roller group 51, a second roller group 52, and a third roller group 53 sequentially arranged on the frame body 1. The packaging film 3 sequentially bypasses the first roller group 51, the second roller group 52, and the third roller group 53 and then is connected to the film pulling motor;

[0027] The first roller group 51 includes a first film guiding roller 511, a second film guiding roller 512, and a third film guiding roller 513 sequentially arranged between the passing roller 45 and the air shaft 2 from bottom to top. The packaging film 3 sequentially bypasses the first film guiding roller 511, the second film guiding roller 512, the first roller shaft 45, the third film guiding roller 513, and the second roller shaft 46.

[0028] The second roller group 52 includes a fourth film guiding roller 521, a fifth film guiding roller 522, a sixth film guiding roller 523, and a seventh film guiding roller 524 sequentially arranged at one end of the frame body 1. The packaging film 3 passing through the second roller shaft 46 sequentially passes through the fourth film guiding roller 521, the fifth film guiding roller 522, the sixth film guiding roller 523, and the seventh film guiding roller 524.

[0029] The third roller group 53 includes an eighth film guiding roller 531, a ninth film guiding roller 532, and a tenth film guiding roller 533 sequentially arranged at the other end of the frame body 1. The packaging film 3 passing through the seventh roller shaft sequentially passes through the eighth film guiding roller 531, the ninth film guiding roller 532, and the tenth film guiding roller 533 and then is connected to the film pulling motor.

[0030] The specific working process of the present utility model:

[0031] When the film pulling motor drives the packaging film 3 to be unfolded and stretched from the air shaft 2, the packaging film 3 moves around the roller shaft one 45 and the roller shaft two 46, generating a pulling force on the swing frame 42 in the direction of the roller group one 51. The swing frame 42 overcomes this pulling force through the torsion spring 44. Under the combined action of the packaging film 3 and the torsion spring 44, the swing frame 42 is in a force balance state. At this time, the rotating shaft 41 connected to the swing frame 42 drives the swing block 432 to swing an angle through the swing arm 4311 and the connecting rod 4312 in sequence, so that the brake pad 433 on the swing block 432 is separated from the brake disc 6 on the air shaft 2, ensuring that the brake pad 433 and the brake disc 6 are in a separated state when the film pulling motor stretches and unfolds the packaging film 3;

[0032] When it is necessary to stop the conveyance of the packaging film 3, the film pulling motor stops pulling the packaging film 3. At this time, the pulling forces on the roller shaft one 45 and the roller shaft two 46 from the packaging film 3 decrease, and the torsion force of the torsion spring 44 on the swing frame 42 is greater than the pulling force of the packaging film 3. Thus, the swing frame 42 is driven to rotate through the rotating shaft 41. The swing frame 42 drives the swing arm 4311 and the connecting rod 4312 to move in sequence. The connecting rod 4312 drives the swing block 432 to swing, so that the brake pad 433 on the swing block 432 contacts the brake disc 6 on the air shaft 2, thereby playing the role of automatic braking and preventing the packaging film 3 on the air shaft 2 from coming off;

[0033] Similarly, when the film pulling motor starts again to pull the packaging film 3, the generated pulling force is balanced with the torsion force of the torsion spring 44 again, so that the brake pad 433 is separated from the brake disc 6, enabling the film pulling motor to smoothly convey the packaging film 3;

[0034] By adjusting the length of the connecting rod 4312 on the swing arm 4311, the braking force of the brake pad 433 is adjusted, avoiding insufficient braking force or excessive pulling force on the packaging film 3, thus making the braking of the air shaft 2 more stable and reliable.

[0035] The pulling force generated by the packaging film 3 drives the swing frame 42 of the braking mechanism 4 to swing against the torsion force of the torsion spring 44, and then drives the braking assembly 43 to move through the rotating shaft 41, so that the brake pad 433 is separated from or contacts the brake disc 6, thereby achieving the effect that the air shaft 2 can automatically generate braking after the film pulling motor stops. The braking mechanism 4 is a pure mechanical structure, without the need to configure power output devices such as motors or cylinders, with a simple structure, better reliability, and at the same time reducing production costs.

[0036] The technical features not described in the present utility model can be achieved by or adopted from the prior art, and will not be elaborated here. Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the substantial scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A film guiding frame for a packaging machine with an automatic braking function, comprising a frame body (1) and an air shaft (2) rotatably arranged on the frame body (1), wherein a packaging film (3) is arranged on the air shaft (2), and it is characterized in that, It further includes a film guiding mechanism and a braking mechanism (4) respectively rotatably arranged on the frame body (1). The braking mechanism (4) is in separable contact with the air shaft (2). The packaging film (3) bypasses the film guiding mechanism and the braking mechanism (4) and is connected with a film pulling motor. The braking mechanism (4) includes a rotating shaft (41) rotatably arranged on the frame body (1), a swing frame (42) connected to the side of the rotating shaft (41), a passing roller (45) rotatably arranged on the swing frame (42), a braking component (43) arranged at one end of the rotating shaft (41), and a torsion spring (44) with one end connected to the other end of the rotating shaft (41). The other end of the torsion spring (44) is connected to the frame body (1). The braking component (43) is in separable contact with the air shaft (2). The packaging film (3) is arranged bypassing the passing roller (45).

2. The film guiding frame for a packaging machine with an automatic braking function according to claim 1, characterized in that, The braking component (43) includes a support unit (431) with one end connected to the end of the rotating shaft (41), and a swing block (432) swingably arranged at the end position of the air shaft (2). The other end of the support unit (431) is hinged to one end of the swing block (432). A brake disc (6) is coaxially arranged at the end of the air shaft (2). A brake pad (433) for braking the brake disc (6) is arranged on the swing block (432).

3. The film guiding frame for a packaging machine with an automatic braking function according to claim 2, characterized in that, The support unit (431) includes a swing arm (4311) with one end connected to the rotating shaft (41), and a connecting rod (4312) adjustably arranged at the other end of the swing arm (4311). The other end of the connecting rod (4312) is hinged to the swing block (432).

4. The film guiding frame for a packaging machine with an automatic braking function according to claim 3, characterized in that, The passing roller (45) includes a roller shaft one (45) and a roller shaft two (46) respectively rotatably arranged on the swing frame (42) from top to bottom. The film guiding mechanism includes a roller group one (51), a roller group two (52) and a roller group three (53) sequentially arranged on the frame body (1). The packaging film (3) is sequentially bypassed around the roller group one (51), the roller group two (52), the roller group three (53) and then connected to the film pulling motor. The roller group one (51) includes a film guiding roller one (511), a film guiding roller two (512), and a film guiding roller three (513) sequentially arranged between the passing roller (45) and the air shaft (2) from bottom to top. The packaging film (3) is sequentially bypassed around the film guiding roller one (511), the film guiding roller two (512), the roller shaft one (45), the film guiding roller three (513), and the roller shaft two (46).

5. The film guiding frame for a packaging machine with an automatic braking function according to claim 4, characterized in that, The roller group two (52) includes a film guiding roller four (521), a film guiding roller five (522), a film guiding roller six (523), and a film guiding roller seven (524) sequentially arranged at one end of the frame body (1). The packaging film (3) passing through the roller shaft two (46) is sequentially arranged passing through the film guiding roller four (521), the film guiding roller five (522), the film guiding roller six (523), and the film guiding roller seven (524).

6. The film guiding frame for a packaging machine with an automatic braking function according to claim 5, characterized in that, The third roller group (53) includes a film guiding roller VIII (531), a film guiding roller IX (532), and a film guiding roller X (533) that are sequentially arranged at the other end of the frame body (1). The packaging film (3) passing through the seventh roller shaft sequentially passes through the film guiding roller VIII (531), the film guiding roller IX (532), and the film guiding roller X (533) and then is connected to the film pulling motor.

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