Film supply device of food packaging machine

Abstract

The present application relates to the technical field of food packaging machines, and in particular to a film supply device of a food packaging machine, comprising a film supply module, the film supply module comprising a mounting frame, an unwinding mechanism, a tensioning mechanism, and a film supply mechanism, wherein the packaging film output by the unwinding mechanism is sequentially wound around the tensioning mechanism and the film supply mechanism, and then folded, heat-sealed, and output; and a support module, the support module comprising a connecting frame, a lifting frame, and a support mechanism, wherein one side of the connecting frame is arranged on the mounting frame, the lifting frame is arranged on the side of the connecting frame away from the mounting frame, the support mechanism is arranged on the side of the lifting frame away from the connecting frame, and the support mechanism abuts against the end of the unwinding mechanism away from the mounting frame. The support module of the present application is mainly used to directly support the free end of the unwinding mechanism, thereby indirectly supporting the packaging film roll, and minimizing the situation in which the longer unwinding roller is easily deformed by stress.

Description

Technical Field

[0001] The present application relates to the technical field of food packaging machines, and in particular to a film supply device of a food packaging machine. Background Art

[0002] In the food packaging process, packaging bags are usually formed by folding the packaging film and then heat-sealing it. The incoming packaging film is usually a roll material, so the packaging machine usually uses a film supply device to supply the packaging film.

[0003] The film supply device of the packaging machine in the traditional technology needs to stop the machine to change the film or connect the second roll of film after the first roll of film is used up. Under normal circumstances, the operator needs to stop the machine to complete the film connection process. At this time, the front-end production line cannot be stopped for continuous production, and the shutdown of the packaging machine will cause dozens of products to pile up. Based on the above situation, a packaging film supply device disclosed by the authorization announcement number CN214029310U is provided. By setting a first driven roller and a second driven roller at both ends of the two film connection plates, the conveying track of the packaging film drawn from the material roll on the unwinding roller can be set along the upper side of the film connection plate. The packaging film passes through the upper side of the film connection plate and is then transported from the two film connection plates to the active roller, so that when changing the roll of film, the new packaging film can be connected to the end of the used packaging film roll on the corresponding film connection plate, thereby avoiding the problem of product accumulation as much as possible.

[0004] However, since some packaging films with larger widths need to be adapted to longer unwinding rollers, and packaging films with larger widths have correspondingly larger weights, and one end of the longer unwinding roller is in an overhead state, it is easy for the unwinding roller to be deformed by force, resulting in swaying and uneven unwinding of the packaging film, which ultimately leads to a decrease in packaging quality. Summary of the Invention

[0005] In order to avoid as much as possible the phenomenon that the unwinding mechanism is subjected to stress deformation caused by the heavy packaging film roll, resulting in swaying and uneven unwinding of the packaging film, and to ensure the final packaging quality, the present application provides a film supply device for a food packaging machine.

[0006] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0007] A film feeding device of a food packaging machine includes a film feeding module, which includes a mounting frame, a reeling mechanism, a tensioning mechanism and a film feeding mechanism, one end of the reeling mechanism is arranged on the mounting frame, and a rotating sliding mechanism is arranged between one end of the reeling mechanism and the mounting frame to enable the reeling mechanism to have a rotational degree of freedom and a sliding degree of freedom, the tensioning mechanism is arranged on the mounting frame, the film feeding mechanism is arranged on the mounting frame, and the packaging film output by the reeling mechanism is folded and heat-sealed after passing through the tensioning mechanism and the film feeding mechanism in sequence for output; a supporting module, which includes a connecting frame, a lifting frame and a supporting mechanism, one side of the connecting frame is arranged on the mounting frame, and a flip mechanism is arranged between one side of the connecting frame and the mounting frame to enable the connecting frame to have a flipping degree of freedom, the lifting frame is arranged on a side of the connecting frame away from the mounting frame, and a lifting mechanism for adjusting the distance between the lifting frame and the connecting frame is arranged between the lifting frame and the connecting frame, and the supporting mechanism is arranged The adjusting module comprises a fixed frame, a translation frame, an adjusting mechanism and a brake mechanism, the fixed frame is arranged on the installation frame, one end of the translation frame is arranged on the fixed frame, and a translation limit mechanism is arranged between one end of the translation frame and the fixed frame, so that the translation frame is translated along the axial direction of the unwinding mechanism, the brake mechanism is arranged between the translation frame and the tensioning mechanism, and the brake mechanism is used for limiting the rotation of the unwinding mechanism when the film feeding mechanism stops running, the adjusting mechanism is arranged between the fixed frame and the translation frame, and the adjusting mechanism is used for driving the translation frame to translate along the axial direction of the unwinding mechanism, the other end of the translation frame is arranged on the unwinding mechanism, and a rotation limiting mechanism is arranged between the other end of the translation frame and the unwinding mechanism, so that the translation frame drives the brake mechanism and the unwinding mechanism to slide synchronously along the axial direction of the unwinding mechanism.

[0008] Optionally, the rotating sliding mechanism includes a mounting sleeve, a mounting plate, a needle roller bearing and a sliding sleeve, the mounting sleeve and the mounting plate are fixedly arranged on the mounting frame, and the mounting sleeve and the mounting plate are combined to form a mounting groove, the outer periphery of the needle roller bearing is fixedly embedded in the mounting groove, the sliding sleeve is fixedly arranged on the unwinding mechanism, and the sliding sleeve is slidably passed through the inner periphery of the needle roller bearing; the rotating limiting mechanism includes a limiting sleeve and two groups of limiting blocks, the limiting sleeve is fixedly arranged on the unwinding mechanism, and the limiting sleeve is provided with a limiting groove coaxially arranged with the axis of the unwinding mechanism, the two groups of limiting blocks are fixedly arranged on the translation frame, and the two groups of limiting blocks are respectively slidably arranged on both sides of the limiting groove that are opposite to each other.

[0009] Optionally, the brake mechanism includes a brake wheel, a brake connecting rod, a brake pad and a first reset member, the brake wheel is fixedly arranged on a limiting sleeve, one end of the brake connecting rod is rotatably arranged on a translation frame, the brake pad is rotatably arranged in the middle of the brake connecting rod, and the first reset member is arranged between the brake connecting rod and the translation frame, so that the brake pad always has a tendency to fit close to the brake wheel; the tensioning mechanism includes a first eccentric member, a second eccentric member, a third eccentric member, a fourth eccentric member, a tensioning roller, a transmission shaft, a second reset member and a trigger member, the first eccentric member is rotatably arranged on the mounting frame, the tensioning roller is rotatably arranged on the first eccentric member, and the transmission The shaft is rotatably arranged on the mounting frame, the second eccentric is fixedly arranged at one end of the transmission shaft, and a transmission connecting rod is arranged between the second eccentric and the first eccentric, the third eccentric is fixedly arranged in the middle of the transmission shaft, and the second reset member is arranged between the third eccentric and the mounting frame, so that the tensioning roller applies tensioning force to the packaging film output by the unwinding mechanism, the fourth eccentric is fixedly arranged at the other end of the transmission shaft, and the trigger is fixedly arranged at the fourth eccentric, the trigger is abutted against the end of the brake connecting rod away from the translation frame, and the trigger pushes the brake connecting rod to rotate when the film supply mechanism starts to operate, so that the brake pad is separated from the brake wheel.

[0010] Optionally, the translation limit mechanism includes a limit slide and a translation screw, the limit slide is fixedly arranged on the fixed frame, the translation frame is slidably arranged on the limit slide at one end away from the unwinding mechanism, the translation screw is rotatably arranged on the fixed frame, and the translation frame is threadedly connected to the translation screw at one end away from the unwinding mechanism; the adjusting mechanism includes an adjusting shaft, a driving sprocket, a driven sprocket, a guide sprocket and a chain, the adjusting shaft is rotatably arranged on the fixed frame, the driving sprocket is fixedly arranged on the adjusting shaft, the driven sprocket is fixedly arranged on the translation screw, the guide sprocket is rotatably arranged on the fixed frame, and the chain is connected between the driving sprocket, the driven sprocket and the guide sprocket.

[0011] Optionally, the lifting mechanism includes a guide slide rod, a guide sleeve and a lifting screw, the guide slide rod is fixedly arranged on the connecting frame, the guide sleeve is fixedly arranged on the lifting frame, and the guide sleeve is slidably arranged on the guide slide rod, the lifting screw is rotatably arranged on the connecting frame, and the lifting screw is threadedly connected to the lifting frame; the support mechanism includes two sets of support wheels, both sets of support wheels are fixedly arranged on the side of the lifting frame away from the connecting frame, and both sets of support wheels are in contact with the end of the unwinding mechanism away from the mounting frame.

[0012] Optionally, the trigger member is fixedly provided with a ball bearing, and a contact block is provided at one end of the brake connecting rod away from the translation frame, and the ball bearing abuts against the contact block.

[0013] Optionally, the first eccentric members are configured in two groups, and the two groups of the first eccentric members are symmetrically arranged and rotatably set on the mounting frame, and the two ends of the tensioning roller are respectively rotatably set on the two groups of first eccentric members.

[0014] Optionally, the axis of the flipping mechanism and the axis of the unwinding mechanism are always arranged vertically.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] Based on the fact that some packaging films with larger widths need to be adapted to longer unwinding rollers, but longer unwinding rollers are prone to deformation under stress, the support module is mainly used to directly support the free end of the unwinding mechanism, thereby indirectly supporting the packaging film roll; S1, rotate the lifting screw to drive the lifting frame to move in the direction away from the unwinding mechanism, so that the support wheel is separated from the free end of the unwinding mechanism, S2, flip the connecting frame to drive the support module as a whole to rotate in the direction away from the unwinding mechanism, so that the free end of the unwinding mechanism is unobstructed, S3, the packaging film roll is inserted into the free end of the unwinding mechanism and then locked, S4, flip the connecting frame to drive the support module as a whole to rotate in the direction close to the unwinding mechanism, so that the connecting frame and the lifting frame are flipped to be arranged perpendicular to the unwinding mechanism, S5, rotate the lifting screw to drive the lifting frame to move in the direction close to the unwinding mechanism, so that the support wheel abuts against the free end of the unwinding mechanism. At this time, the support module can directly support the free end of the unwinding mechanism and indirectly support the packaging film roll, so as to avoid the unwinding mechanism from being deformed by the heavy packaging film roll, resulting in swaying and uneven unwinding of the packaging film, thereby ensuring the final packaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of this application.

[0018] Figure 2 It is a structural stereogram of the support module in this application.

[0019] Figure 3 This is a structural stereogram of the adjustment module in this application at a first viewing angle.

[0020] Figure 4 This is a structural stereogram of the adjustment module in this application at a second viewing angle.

[0021] Figure 5 It is a structural cross-sectional view of the rotary sliding mechanism in this application.

[0022] Figure 6 It is a structural stereogram of the tensioning mechanism in this application.

[0023] Explanation of the accompanying symbols: 1. Film supply module; 11. Mounting frame; 12. Unwinding mechanism; 13. Tensioning mechanism; 131. First eccentric member; 132. Second eccentric member; 133. Third eccentric member; 134. Fourth eccentric member; 135. Tensioning roller; 136. Transmission shaft; 137. Second reset member; 138. Trigger member; 139. Transmission connecting rod; 14. Film supply mechanism; 15. Rotary sliding mechanism; 151. Mounting sleeve; 152. Mounting plate; 153. Needle roller bearing; 154. Sliding sleeve; 155. Mounting groove; 2. Support module; 21. Connecting frame; 22. Lifting frame; 23. Support mechanism; 231. Support wheel; 24. Flipping mechanism ; 25. Lifting mechanism; 251. Guide slide; 252. Guide sleeve; 253. Lifting screw; 3. Adjusting module; 31. Fixed frame; 32. Translation frame; 33. Adjusting mechanism; 331. Adjusting shaft; 332. Driving sprocket; 333. Driven sprocket; 334. Guide sprocket; 335. Chain; 34. Braking mechanism; 341. Brake wheel; 342. Brake link; 343. Brake pad; 344. First reset member; 35. Translation limiting mechanism; 351. Limiting slide; 352. Translation screw; 36. Rotation limiting mechanism; 361. Limiting sleeve; 362. Limiting block; 363. Limiting groove; 4. Ball bearing; 5. Contact block. DETAILED DESCRIPTION

[0024] The following is combined with Figures 1 to 6 This application is described in further detail.

[0025] The present application discloses a film supply device for a food packaging machine.

[0026] Reference Figure 1-3 The film supply device of the food packaging machine includes a film supply module 1, a support module 2 and an adjustment module 3; wherein the film supply module 1 is used to unwind and fold and heat-seal the packaging film roll to output it; the support module 2 is used to support the packaging film roll to prevent the packaging film roll with a larger width from causing deformation of the film supply module 1 and affecting its normal work; the adjustment module 3 is used to adjust the packaging film roll to the center to prevent the packaging film from deviating and affecting the normal work of the film supply module 1.

[0027] The film supply module 1 specifically includes a mounting frame 11, a reeling mechanism 12, a tensioning mechanism 13 and a film supply mechanism 14; wherein the reeling mechanism 12 is a reeling roller with a locking function, and the reeling mechanism 12 is configured with two groups, and the two groups of reeling mechanisms 12 are arranged symmetrically with each other, and one end of the two groups of reeling mechanisms 12 (for the convenience of explanation and understanding, this end is defined as the reeling mechanism 12 mounting end) is both provided on the mounting frame 11, so that the two groups of packaging film rolls can be inserted and locked by the other end of the reeling mechanism 12 (for the convenience of explanation and understanding, this end is defined as the reeling mechanism 12 free end), and a rotating slide is provided between the reeling mechanism 12 mounting end and the mounting frame 11. The movable mechanism 15, that is, the mounting end of the unwinding mechanism 12 is arranged on the mounting frame 11 through the rotating sliding mechanism 15, so that the unwinding mechanism 12 has the rotational freedom of rotating along its axis and the sliding freedom of moving along its axis; the tensioning mechanism 13 is arranged on the mounting frame 11, and the tensioning mechanism 13 is used to apply tensioning force to the packaging film output by the unwinding mechanism 12; the film supply mechanism 14 is arranged on the mounting frame 11, and the film supply mechanism 14 is used to fold and heat-seal the packaging film output by the unwinding mechanism 12, that is, the packaging film output by the unwinding mechanism 12 is folded and heat-sealed and output after passing through the tensioning mechanism 13 and the film supply mechanism 14 in sequence.

[0028] In the above, the specific structure and principle of the mounting frame 11, the specific structure and principle of the unwinding mechanism 12, the specific structure and principle of the film supply mechanism 14, and the method and principle of folding and heat-sealing the packaging film are all existing technologies. For details, please refer to the packaging film supply device with announcement number CN214029310U proposed by the applicant in 2020, which will not be repeated here.

[0029] The support module 2 specifically includes a connecting frame 21, a lifting frame 22 and a supporting mechanism 23; wherein the connecting frame 21 is located below the free end of the unwinding mechanism 12, and one side of the connecting frame 21 (for the sake of ease of explanation and understanding, this side is defined as the bottom of the connecting frame 21) is arranged on the mounting frame 11, and a flipping mechanism 24 is provided between the bottom of the connecting frame 21 and the mounting frame 11, that is, the bottom of the connecting frame 21 and the mounting frame 11 are movably connected through the flipping mechanism 24, and the flipping mechanism 24 specifically adopts the hinge structure in the prior art, the axis of the flipping mechanism 24 is arranged horizontally, and the axis of the flipping mechanism 24 and the axis of the unwinding mechanism 12 are always arranged vertically, so that the connecting frame 21 has the freedom to flip, and the connecting frame 21 can flip to the same position as the unwinding mechanism 12. The mechanism 12 is arranged vertically; the lifting frame 22 is arranged on the side of the connecting frame 21 away from the mounting frame 11 (for the sake of convenience of explanation and understanding, this side is defined as the top of the connecting frame 21), and a lifting mechanism 25 is provided between the lifting frame 22 and the connecting frame 21 for adjusting the distance between the two, so that when the connecting frame 21 is flipped to be arranged vertically with the unwinding mechanism 12, the distance between the lifting frame 22 and the connecting frame 21 is adjusted by the lifting mechanism 25, so that the lifting frame 22 can move in the direction of approaching / moving away from the unwinding mechanism 12, and the supporting mechanism 23 is provided on the side of the lifting frame 22 away from the connecting frame 21 (for the sake of convenience of explanation and understanding, this side is defined as the top of the lifting frame 22), and the supporting mechanism 23 abuts against the free end of the unwinding mechanism 12 away from the mounting frame 11.

[0030] The lifting mechanism 25 specifically includes a guide slide 251, a guide sleeve 252 and a lifting screw 253; wherein, the guide slide 251 is fixedly arranged at the top of the connecting frame 21, the guide sleeve 252 is fixedly arranged at the bottom of the lifting frame 22, and the guide sleeve 252 is slidably arranged on the guide slide 251, and the lifting screw 253 is rotatably arranged at the top of the connecting frame 21 through a preset connecting bearing, and the lifting screw 253 is threadedly connected to the lifting screw sleeve preset in the lifting frame 22; the support mechanism 23 specifically includes two groups of support wheels 231, both groups of support wheels 231 are fixedly arranged at the top of the lifting frame 22, the axes of the two groups of support wheels 231 are arranged parallel to the axis of the unwinding mechanism 12, and the two groups of support wheels 231 are abutted against the free ends of the unwinding mechanism 12.

[0031] The implementation principle of the support module 2: Based on the fact that some packaging films with larger widths need to be adapted to longer unwinding rollers, but longer unwinding rollers are prone to deformation due to stress, the support module 2 is mainly used to directly support the free end of the unwinding mechanism 12, thereby indirectly supporting the packaging film roll; S1, rotate the lifting screw 253 to drive the lifting frame 22 to move away from the unwinding mechanism 12, so that the support wheel 231 is separated from the free end of the unwinding mechanism 12, S2, flip the connecting frame 21 to drive the support module 2 as a whole Rotate in a direction away from the unwinding mechanism 12 so that the free end of the unwinding mechanism 12 is free of obstructions. S3. Insert the packaging film roll through the free end of the unwinding mechanism 12 and lock it. S4. Flip the connecting frame 21 to drive the support module 2 to rotate as a whole in a direction close to the unwinding mechanism 12, so that the connecting frame 21 and the lifting frame 22 are flipped to be arranged perpendicular to the unwinding mechanism 12. S5. Rotate the lifting screw 253 to drive the lifting frame 22 to move in a direction close to the unwinding mechanism 12, so that the support wheel 231 abuts against the free end of the unwinding mechanism 12. At this time, the support module 2 can directly support the free end of the unwinding mechanism 12 and indirectly support the packaging film roll, so as to avoid the heavy packaging film roll causing the unwinding mechanism 12 to be deformed by force, resulting in swaying and uneven unwinding of the packaging film, thereby ensuring the final packaging quality.

[0032] Similarly, because some packaging films with wider widths require a longer tensioning mechanism 13, the tensioning mechanism 13 comprises a first eccentric 131 and a tensioning roller 135 (the tensioning mechanism 13 also includes other structural components, which will be described below). The first eccentric 131 is a plate-like structure, and there are two sets of first eccentrics 131, symmetrically arranged. One end of each set of first eccentrics 131 is rotatably mounted on the mounting frame 11, while the ends of the tensioning roller 135 are rotatably mounted on the ends of the two sets of first eccentrics 131 away from the mounting frame 11. The two sets of first eccentrics 131 provide support for the ends of the tensioning roller 135, minimizing deformation of the longer tensioning mechanism 13 due to its own weight, which could affect packaging quality.

[0033] Reference Figure 1-6The adjustment module 3 specifically includes a fixed frame 31, a translation frame 32, an adjustment mechanism 33 and a brake mechanism 34; wherein the fixed frame 31 is fixedly arranged on the mounting frame 11, one end of the translation frame 32 (for the sake of ease of explanation and understanding, this end is defined as the front end of the translation frame 32) is arranged on the fixed frame 31, and a translation limiting mechanism 35 is provided between the front end of the translation frame 32 and the fixed frame 31, that is, the front end of the translation frame 32 is movably arranged on the fixed frame 31 through the translation limiting mechanism 35, so that the translation frame 32 can only be translated along the axial direction of the unwinding mechanism 12; the brake mechanism 34 is provided between the translation frame 32 and the tensioning mechanism 13, and when the film feeding mechanism 14 stops running, the tension of the packaging film is adjusted in sequence through the tensioning mechanism 13, the brake mechanism 34 The brake mechanism 34 is transmitted to the unwinding mechanism 12, so that the unwinding mechanism 12 is restricted from rotating, and the phenomenon of the unwinding mechanism 12 rotating due to inertia is avoided as much as possible; the adjusting mechanism 33 is arranged between the fixed frame 31 and the translation frame 32, and the adjusting mechanism 33 is used to drive the translation frame 32 to translate along the axial direction of the unwinding mechanism 12, and the other end of the translation frame 32 (for the sake of convenience of explanation and understanding, this end is defined as the tail end of the translation frame 32) is arranged on the unwinding mechanism 12, and a rotation limiting mechanism 36 is provided between the tail end of the translation frame 32 and the unwinding mechanism 12, that is, the tail end of the translation frame 32 is movably arranged on the unwinding mechanism 12 through the rotation limiting mechanism 36, so that the translation frame 32 can drive the brake mechanism 34 and the unwinding mechanism 12 to slide synchronously along the axial direction of the unwinding mechanism 12.

[0034] The adjusting module 3 can drive the unwinding mechanism 12 to slide along the axis direction of the unwinding mechanism 12. Therefore, the unwinding mechanism 12 needs to have the rotational freedom of rotating along its axis and the sliding freedom of moving along its axis direction under the action of the rotating sliding mechanism 15; the rotating sliding mechanism 15 specifically includes a mounting sleeve 151, a mounting plate 152, a needle bearing 153 and a sliding sleeve 154. The mounting sleeve 151 and the mounting plate 152 are fixed to the mounting frame 11 by bolt connection, and the mounting sleeve 151 and the mounting plate 152 are closed to form a mounting groove 155 of an annular structure. First, The mounting sleeve 151 is fixedly set on the mounting frame 11, and the outer circumference of the needle roller bearing 153 is fixedly embedded in the inner circumference of the mounting sleeve 151 with an interference fit. Finally, the mounting plate 152 is fixedly set on the mounting frame 11 and closed with the mounting sleeve 151, so that the needle roller bearing 153 is embedded in the mounting groove 155, and the sliding sleeve 154 is fixedly set on the mounting end of the unwinding mechanism 12, and the sliding sleeve 154 is slidably passed through the inner circumference of the needle roller bearing 153. The mounting end of the unwinding mechanism 12 realizes rotational freedom and sliding freedom through the sliding and rotation settings between the sliding sleeve 154 and the needle roller bearing 153.

[0035] In addition, in order to improve the movement stability of the unwinding mechanism 12 in this embodiment, two sets of rotating sliding mechanisms 15 arranged at intervals from each other are provided at the mounting end position of the mounting frame 11 corresponding to each unwinding mechanism 12.

[0036] Since the unwinding mechanism 12 will rotate along the axis of the unwinding mechanism 12 under the drive of the film feeding mechanism 14, the translation frame 32 needs to drive the unwinding mechanism 12 to move along the axis of the unwinding mechanism 12 through the rotation limit mechanism 36 without affecting the rotation of the unwinding mechanism 12; the rotation limit mechanism 36 specifically includes a limit sleeve 361 and two sets of limit blocks 362, the limit sleeve 361 is fixedly arranged at the installation end of the unwinding mechanism 12, and the limit sleeve 361 is located between the two sets of limit blocks 362. At the position between the rotating and sliding mechanisms 15, the outer circumference of the limit sleeve 361 is recessed inward and is provided with a limit groove 363 coaxially arranged with the axis of the unwinding mechanism 12. The two groups of limit blocks 362 are fixedly set at the tail end of the translation frame 32, and the two groups of limit blocks 362 are respectively slidably set on the two opposite sides of the limit groove 363, and the two groups of limit blocks 362 are both in contact with the side walls and bottom walls of the limit groove 363, so that the limit sleeve 361 also forms a supporting effect on the tail end of the translation frame 32. When the translation frame 32 is driven by external force to move along the axial direction of the unwinding mechanism 12, the translation frame 32 drives the unwinding mechanism 12 to move along the axial direction of the unwinding mechanism 12 through the cooperation of the limit block 362 and the limit sleeve 361, and the limit block 362 and the limit sleeve 361 slide together, so that the translation frame 32 drives the unwinding mechanism 12 to move along the axial direction of the unwinding mechanism 12 through the rotating limit mechanism 36 without affecting the rotation of the unwinding mechanism 12.

[0037] In addition, in order to improve the movement stability of the translation frame 32 in this embodiment, a translation limiting mechanism 35 is provided at the front end position of each translation frame 32 on the fixed frame 31; the translation limiting mechanism 35 specifically includes a limiting slide bar 351 and a translation screw 352, the limiting slide bar 351 and the translation screw 352 are both arranged parallel to the axis of the unwinding mechanism 12, the limiting slide bar 351 is fixedly set on the fixed frame 31, the front end of the translation frame 32 is slidably set on the limiting slide bar 351, and the translation screw 352 is rotatably set on the fixed frame The translation frame 31 and the threaded hole reserved at the front end of the translation frame 32 are threadedly connected to the translation screw 352; the translation screw 352 is rotated by external force to drive the translation frame 32 to move along the axial direction of the unwinding mechanism 12, and in the process of the translation frame 32 moving along the axial direction of the unwinding mechanism 12, the limiting slide bar 351 and the rotation limiting mechanism 36 jointly form a limiting effect on the translation frame 32, so that the threaded hole of the translation frame 32 and the translation screw 352 always maintain a coaxial arrangement, thereby reducing the friction force of the screw thread and the wear rate of the screw thread.

[0038] The adjusting mechanism 33 disposed between the fixed frame 31 and the translation frame 32 is the external force source for rotating the translation screw 352; the adjusting mechanism 33 specifically includes an adjusting shaft 331, a driving sprocket 332, a driven sprocket 333, a guide sprocket 334 and a chain 335; wherein the adjusting shaft 331 is rotatably disposed on the fixed frame 31, the driving sprocket 332 is fixedly disposed on the adjusting shaft 331, the driven sprocket 333 is fixedly disposed on the translation screw 352, and the guide sprocket 334 is rotatably disposed on the fixed frame 31. The frame 31 and the chain 335 are connected between the driving sprocket 332, the driven sprocket 333 and the guide sprocket 334; the driving sprocket 332 is driven to rotate by rotating the adjusting shaft 331, and the driving sprocket 332 drives the driven sprocket 333 and the translation screw 352 to rotate through the chain 335, thereby driving the translation frame 32 to move along the axial direction of the unwinding mechanism 12; the guide sprocket 334 plays a guiding role in this process, and tries to avoid the setting of the chain 335 from affecting other mechanisms / components of the film supply device.

[0039] The implementation principle of the adjustment module 3: When the packaging film roll needs to be adjusted to the center to avoid the packaging film from running off and affecting the normal operation of the film supply module 1, the adjusting shaft 331 is rotated to drive the active sprocket 332 to rotate, and the active sprocket 332 drives the driven sprocket 333 and the translation screw 352 to rotate through the chain 335. The translation screw 352 drives the translation frame 32 to move along the axis direction of the unwinding mechanism 12 through the thread transmission. The translation frame 32 cooperates with the limit block 362 and the limit sleeve 361 to bring The dynamic unwinding mechanism 12 moves along the axial direction of the unwinding mechanism 12, and due to the sliding fit between the limit block 362 and the limit sleeve 361, the normal rotation of the unwinding mechanism 12 is not affected; and in the process of the translation frame 32 moving along the axial direction of the unwinding mechanism 12, the limit slide bar 351 and the rotation limit mechanism 36 jointly form a limiting effect on the translation frame 32, so that the threaded hole of the translation frame 32 and the translation screw 352 always remain coaxially arranged, reducing the friction force of the screw thread and the wear rate of the screw thread.

[0040] Since the film feeding mechanism 14 is intermittently fed and the packaging film is intermittently conveyed during the operation of the food packaging machine, when the film feeding mechanism 14 stops running, it is necessary to use the brake mechanism 34 arranged between the translation frame 32 and the tensioning mechanism 13 to limit the rotation of the unwinding mechanism 12, so as to avoid the unwinding mechanism 12 from rotating due to inertia as much as possible.

[0041] The brake mechanism 34 specifically includes a brake wheel 341, a brake connecting rod 342, a brake pad 343 and a first reset member 344; wherein, the brake wheel 341 is fixedly arranged on the outer periphery of the limit sleeve 361, one end of the brake connecting rod 342 is rotatably arranged on the translation frame 32, and the brake pad 343 is rotatably arranged in the middle of the brake connecting rod 342. The first reset member 344 is a torsion spring structure, and the first reset member 344 is arranged between the brake connecting rod 342 and the translation frame 32, so that the brake pad 343 always has a tendency to approach and fit the brake wheel 341, and the side where the brake pad 343 and the brake wheel 341 fit each other is provided with anti-slip grooves to achieve friction braking.

[0042] In addition to the first eccentric 131 and the tensioning roller 135, the tensioning mechanism 13 also includes a second eccentric 132, a third eccentric 133, a fourth eccentric 134, a transmission shaft 136, a second reset member 137 and a trigger member 138; wherein the first eccentric 131 is a plate-shaped structure, and the first eccentric 131 is configured in two groups, the two groups of first eccentrics 131 are symmetrically arranged, and one end of the two groups of first eccentrics 131 is rotatably set on the mounting frame 11, the two ends of the tensioning roller 135 are respectively rotatably set at the end of the two groups of first eccentrics 131 away from the mounting frame 11, the transmission shaft 136 is rotatably set on the mounting frame 11 through a preset bearing, the second eccentric 132 adopts a structural form in which an eccentric rod is fixed on the outer circumference of the cylinder, the second eccentric 132 is fixedly set at one end of the transmission shaft 136, and the second eccentric 132 and the first eccentric The third eccentric 133 is fixed to the middle part of the transmission shaft 136, and the second reset member 137 is a tension spring structure. The second reset member 137 is connected between the third eccentric 133 and the mounting frame 11, so that the tensioning roller 135 applies tensioning force to the packaging film output by the unwinding mechanism 12. The fourth eccentric 134 adopts the structure of an eccentric block. The fourth eccentric 134 is fixedly arranged at the other end of the transmission shaft 136, and the trigger member 138 is fixedly arranged at the fourth eccentric 134. The trigger member 138 abuts against the end of the brake link 342 away from the translation frame 32, and the trigger member 138 pushes the brake link 342 to rotate when the film supply mechanism 14 starts to run, so that the brake pad 343 disengages from the brake wheel 341.

[0043] The working principle of the tensioning mechanism 13 and the brake mechanism 34 is as follows: when the intermittent feeding film feeding mechanism 14 is in operation, the packaging film pulls the tensioning roller 135 and the first eccentric member 131 downward, and the first eccentric member 131 drives the transmission shaft 136 to rotate in the positive direction through the transmission connecting rod 139 and the second eccentric member 132. The transmission shaft 136 overcomes the pulling force of the second reset member 137 and the torsion of the first reset member 344. The transmission shaft 136 drives the trigger member 138 to rotate in the positive direction along the axis of the transmission shaft 136 through the fourth eccentric member 134, so that the trigger member 138 pushes the brake connecting rod 342 to rotate, so that the brake pad 343 is separated from the brake wheel 341. , realizing the normal feeding of the film feeding mechanism 14; on the contrary, when the intermittent feeding film feeding mechanism 14 stops running, the second reset member 137 pulls the transmission shaft 136 to rotate in the opposite direction, and the transmission shaft 136 drives the trigger member 138 to rotate in the opposite direction along the axis of the transmission shaft 136 through the fourth eccentric member 134, so that the trigger member 138 disengages from the brake link 342, and the torque of the first reset member 344 rotates the brake link 342, so that the brake link 342 drives the brake pad 343 to re-attach to the brake wheel 341, thereby realizing the use of the brake mechanism 34 to limit the rotation of the unwinding mechanism 12, thereby minimizing the phenomenon of the unwinding mechanism 12 rotating due to inertial rotation.

[0044] Since the translation frame 32 will drive the brake mechanism 34 to move along the axial direction of the unwinding mechanism 12, in this embodiment, a ball bearing 4 is fixedly provided on the outer periphery of the trigger member 138, and a contact block 5 is provided at the end of the brake link 342 away from the translation frame 32, and the ball bearing 4 is in contact with the contact block 5; the contact block 5 can increase the profile of the end of the brake link 342, and the ball bearing 4 can roll and slide on the surface of the contact block 5, ensuring that the trigger member 138 and the brake link 342 will not easily slide and detach, thereby ensuring the normal operation of the film supply device.

[0045] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be covered within the scope of protection of the present application.

Claims

1. A film supply device for a food packaging machine, characterized in that: include A film supply module (1) includes a mounting frame (11), a reeling mechanism (12), a tensioning mechanism (13) and a film supply mechanism (14); one end of the reeling mechanism (12) is arranged on the mounting frame (11); and a rotating sliding mechanism (15) is arranged between one end of the reeling mechanism (12) and the mounting frame (11) so that the reeling mechanism (12) has a rotational freedom and a sliding freedom; the tensioning mechanism (13) is arranged on the mounting frame (11); the film supply mechanism (14) is arranged on the mounting frame (11); and the packaging film output by the reeling mechanism (12) is sequentially wound around the tensioning mechanism (13) and the film supply mechanism (14) and then folded, heat-sealed and formed for output; A support module (2), the support module (2) comprises a connecting frame (21), a lifting frame (22) and a supporting mechanism (23); one side of the connecting frame (21) is arranged on the mounting frame (11), and a flipping mechanism (24) is arranged between one side of the connecting frame (21) and the mounting frame (11) so that the connecting frame (21) has a flipping degree of freedom; the lifting frame (22) is arranged on a side of the connecting frame (21) away from the mounting frame (11), and a lifting mechanism (25) for adjusting the distance between the lifting frame (22) and the connecting frame (21) is arranged between the lifting frame (22) and the connecting frame (21); the supporting mechanism (23) is arranged on a side of the lifting frame (22) away from the connecting frame (21), and the supporting mechanism (23) abuts against an end of the unwinding mechanism (12) away from the mounting frame (11); The adjusting module (3) includes a fixed frame (31), a translation frame (32), an adjusting mechanism (33) and a brake mechanism (34). The fixed frame (31) is arranged on the mounting frame (11). One end of the translation frame (32) is arranged on the fixed frame (31). A translation limiting mechanism (35) is arranged between one end of the translation frame (32) and the fixed frame (31) to make the translation frame (32) translate along the axis direction of the unwinding mechanism (12). The brake mechanism (34) is arranged between the translation frame (32) and the tensioning mechanism (13). The brake mechanism (34) is used to When the film supply mechanism (14) stops running, the unwinding mechanism (12) is restricted from rotating. The adjusting mechanism (33) is arranged between the fixed frame (31) and the translation frame (32), and the adjusting mechanism (33) is used to drive the translation frame (32) to translate along the axis of the unwinding mechanism (12). The other end of the translation frame (32) is arranged on the unwinding mechanism (12), and a rotation limiting mechanism (36) is arranged between the other end of the translation frame (32) and the unwinding mechanism (12), so that the translation frame (32) drives the brake mechanism (34) and the unwinding mechanism (12) to slide synchronously along the axis of the unwinding mechanism (12).

2. The film supply device of a food packaging machine according to claim 1, characterized in that: The rotary sliding mechanism (15) comprises a mounting sleeve (151), a mounting plate (152), a needle roller bearing (153) and a sliding sleeve (154); the mounting sleeve (151) and the mounting plate (152) are both fixedly mounted on the mounting frame (11); the mounting sleeve (151) and the mounting plate (152) are combined to form a mounting groove (155); the outer periphery of the needle roller bearing (153) is fixedly embedded in the mounting groove (155); the sliding sleeve (154) is fixedly mounted on the unwinding mechanism (12); and the sliding sleeve (154) is fixedly mounted on the unwinding mechanism (12). 54) is slidably arranged on the inner circumference of the needle bearing (153); the rotation limiting mechanism (36) includes a limiting sleeve (361) and two groups of limiting blocks (362), the limiting sleeve (361) is fixedly arranged on the unwinding mechanism (12), and the limiting sleeve (361) is provided with a limiting groove (363) arranged coaxially with the axis of the unwinding mechanism (12), the two groups of limiting blocks (362) are both fixedly arranged on the translation frame (32), and the two groups of limiting blocks (362) are respectively slidably arranged on two sides of the limiting groove (363) that are opposite to each other.

3. The film supply device of a food packaging machine according to claim 2, characterized in that: The brake mechanism (34) includes a brake wheel (341), a brake connecting rod (342), a brake pad (343) and a first reset member (344). The brake wheel (341) is fixedly arranged on the limit sleeve (361). One end of the brake connecting rod (342) is rotatably arranged on the translation frame (32). The brake pad (343) is rotatably arranged in the middle of the brake connecting rod (342). The first reset member (344) is arranged between the brake connecting rod (342) and the translation frame (32) to make the brake The sheet (343) always has a tendency to approach and fit the brake wheel (341); the tensioning mechanism (13) includes a first eccentric member (131), a second eccentric member (132), a third eccentric member (133), a fourth eccentric member (134), a tensioning roller (135), a transmission shaft (136), a second reset member (137) and a trigger member (138); the first eccentric member (131) is rotatably arranged on the mounting frame (11); the tensioning roller (135) is rotatably arranged on the first eccentric member (131); ), the transmission shaft (136) is rotatably mounted on the mounting frame (11), the second eccentric member (132) is fixedly mounted on one end of the transmission shaft (136), and a transmission connecting rod (139) is provided between the second eccentric member (132) and the first eccentric member (131), the third eccentric member (133) is fixedly mounted on the middle of the transmission shaft (136), and the second reset member (137) is provided between the third eccentric member (133) and the mounting frame (11) to enable the tensioning roller (135) to unwind the tensioning roller. The packaging film output by the mechanism (12) applies tension, the fourth eccentric member (134) is fixedly arranged at the other end of the transmission shaft (136), the trigger member (138) is fixedly arranged on the fourth eccentric member (134), the trigger member (138) is in contact with the end of the brake link (342) away from the translation frame (32), and the trigger member (138) pushes the brake link (342) to rotate when the film supply mechanism (14) starts to operate, so that the brake pad (343) is separated from the brake wheel (341).

4. The film supply device of a food packaging machine according to claim 3, characterized in that: The translation limiting mechanism (35) includes a limiting slide bar (351) and a translation screw (352), wherein the limiting slide bar (351) is fixedly arranged on the fixed frame (31), and one end of the translation frame (32) away from the unwinding mechanism (12) is slidably arranged on the limiting slide bar (351), and the translation screw (352) is rotatably arranged on the fixed frame (31), and one end of the translation frame (32) away from the unwinding mechanism (12) is threadedly connected to the translation screw (352); the adjustment mechanism (33) includes an adjustment shaft (331), an active A sprocket (332), a driven sprocket (333), a guide sprocket (334) and a chain (335); the adjusting shaft (331) is rotatably arranged on the fixed frame (31); the driving sprocket (332) is fixedly arranged on the adjusting shaft (331); the driven sprocket (333) is fixedly arranged on the translation screw (352); the guide sprocket (334) is rotatably arranged on the fixed frame (31); and the chain (335) is connected between the driving sprocket (332), the driven sprocket (333) and the guide sprocket (334).

5. The film supply device of a food packaging machine according to claim 4, characterized in that: The lifting mechanism (25) comprises a guide slide bar (251), a guide sleeve (252) and a lifting screw (253), wherein the guide slide bar (251) is fixedly arranged on the connecting frame (21), the guide sleeve (252) is fixedly arranged on the lifting frame (22), and the guide sleeve (252) is slidably arranged on the guide slide bar (251), the lifting screw (253) is rotatably arranged on the connecting frame (21), and the lifting screw (253) is threadedly connected to the lifting frame (22); the supporting mechanism (23) comprises two groups of supporting wheels (231), both groups of supporting wheels (231) are fixedly arranged on a side of the lifting frame (22) away from the connecting frame (21), and both groups of supporting wheels (231) are in contact with an end of the unwinding mechanism (12) away from the mounting frame (11).

6. The film supply device of a food packaging machine according to claim 3, characterized in that: The trigger member (138) is fixedly provided with a ball bearing (4), and the brake connecting rod (342) is provided with a contact block (5) at one end away from the translation frame (32), and the ball bearing (4) is in contact with the contact block (5).

7. The film supply device of a food packaging machine according to claim 3, characterized in that: The first eccentric members (131) are configured in two groups, and the two groups of the first eccentric members (131) are symmetrically arranged and rotatably set on the mounting frame (11), and the two ends of the tensioning roller (135) are respectively rotatably set on the two groups of the first eccentric members (131).

8. The film supply device of a food packaging machine according to claim 1, characterized in that: The axis of the turnover mechanism (24) and the axis of the unwinding mechanism (12) are always arranged vertically.

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