Film supporting and releasing mechanism for packaging machine

Abstract

The utility model discloses a film supporting and releasing mechanism for a packaging machine, and relates to the technical field of film packaging machines. According to the utility model, one of the pair of film supporting rollers is configured to be a structure capable of translating relative to the other film supporting roller, and after the film roll on the film supporting roller is unwound, the movable film supporting roller is far away from the other film supporting roller, so that the distance between the pair of film supporting rollers is increased, and the roll core of the film roll after the film is unwound can fall off from the space between the film supporting rollers; the roll core is automatically removed, the roll core does not need to be manually removed, then the convenience of film roll replacement is improved, the efficiency of film roll replacement is improved, and a foundation is provided for automatic film replacement. And meanwhile, the function of adaptively adjusting the distance between the film supporting rollers along with the change of the roll diameter of the film roll can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of film packaging machines, in particular to the technical field of a film supporting device for placing a packaging film roll in a film packaging machine, and more specifically to a film supporting mechanism for a packaging machine. Background Art

[0002] The existing film-releasing devices for packaging machines all use a pair of relatively fixed film-supporting rollers to support the film roll, and the film-supporting rollers are connected to a power source. The film-supporting rollers rotate, driving the film roll above them to rotate, thereby realizing the film-supporting and film-releasing functions. For example, the utility model patent with the publication number CN218055843U and the publication date December 16, 2022, named "Film-releasing device for packaging machine", the film-supporting mechanism of the utility model patent is a pair of relatively fixed film-supporting rollers. Another example is the utility model patent with the publication number CN206813429U and the publication date December 29, 2017, named "A film-feeding device for packaging machine", the film-supporting mechanism of the utility model patent is also a pair of relatively fixed film-supporting rollers. Its working principle is to control the linear speed of the film roll unwinding by controlling the rotation speed of the film-supporting rollers through two film-supporting rollers that are tangent to the film roll respectively.

[0003] In the above-mentioned film supporting device, since the two film supporting rollers are fixed, that is, the distance between the film supporting rollers is unchanged, each time the film roll is replaced, the core of the previous film roll (the film roll after the film is released) needs to be taken out of the film supporting device before the new film roll can be placed, resulting in low efficiency in film roll replacement and inconvenience in film roll replacement. Utility Model Content

[0004] In order to overcome the defects and shortcomings in the above-mentioned prior art, the utility model provides a film supporting mechanism for a packaging machine. The purpose of the invention of the utility model is to solve the problem of low film roll replacement efficiency caused by the existing film supporting mechanism requiring workers to take the roll core of the previous film roll. The utility model configures one of the pair of film supporting rollers as a structure that can be translated relative to the other film supporting roller. When the film roll on the film supporting roller has finished filming, the movable film supporting roller is away from the other film supporting roller, so that the distance between the pair of film supporting rollers is increased, and the roll core of the film roll that has finished filming can fall from between the film supporting rollers, realizing automatic removal of the roll core, without the need for workers to remove the roll core, thereby improving the convenience of film roll replacement, improving the efficiency of film roll replacement, and providing a basis for automatic film replacement.

[0005] In order to solve the above problems existing in the prior art, the utility model is implemented through the following technical solutions.

[0006] The utility model provides a film supporting mechanism for a packaging machine, comprising a film supporting frame and film supporting rollers I and II assembled on the film supporting frame, and a separation driving mechanism for changing the spacing between the film supporting rollers I and II.

[0007] Further preferably, film supporting roller I is fixedly mounted relative to the film supporting frame, and film supporting roller I rotates relative to the film supporting frame; film supporting roller II is slidably mounted on the film supporting frame through sliding seats at both ends thereof, and film supporting roller II rotates relative to the sliding seats; the sliding seats are connected to the separation driving mechanism, and the sliding seats are driven by the separation driving mechanism to slide on the film supporting frame, and the sliding seats drive film supporting roller II to approach or move away from film supporting roller I to change the distance between film supporting roller I and film supporting roller II.

[0008] More preferably, the separation drive mechanism is a cylinder.

[0009] Further preferably, film supporting roller I and film supporting roller II both slide relative to the film supporting frame, and film supporting roller I and film supporting roller II are both connected to the separation driving mechanism, and the separation driving mechanism drives film supporting roller I and film supporting roller II to move relatively closer or farther away to change the distance between film supporting roller I and film supporting roller II.

[0010] More preferably, the separation drive mechanism includes a drive motor assembly and a transmission assembly, the drive motor assembly is connected to the transmission assembly, and the drive motor assembly is driven by the transmission assembly to change the spacing between the film supporting roller I and the film supporting roller II.

[0011] More preferably, the transmission assembly is a screw-nut transmission pair, a synchronous belt transmission pair or a rack and pinion transmission pair.

[0012] Further preferably, the film supporting roller I and the film supporting roller II are connected to the same power source via a synchronous belt transmission, and the power source drives the film supporting roller I and the film supporting roller II to rotate synchronously.

[0013] Further preferably, a synchronous pulley II is provided at the end of the film supporting roller II, and a tensioning pulley is provided at the end of the sliding seat of the film supporting roller II, and the positions of the synchronous pulley II and the tensioning pulley are relatively fixed; when the film supporting roller II moves, the synchronous pulley II and the tensioning pulley move synchronously with the film supporting roller II; a synchronous pulley I is provided at the end of the film supporting roller I, and a synchronous pulley III is provided on the output shaft of the power source, and the synchronous belt is wrapped around the synchronous pulley III, the tensioning pulley, the synchronous pulley II and the synchronous pulley I.

[0014] More preferably, it also includes a synchronous pulley IV, the position of which is relatively fixed to that of the synchronous pulley I; the synchronous belt is wound around the synchronous pulley III, the tensioning pulley, the synchronous pulley II, the synchronous pulley I and the synchronous pulley IV.

[0015] Further preferably, the film supporting roller I and the film supporting roller II are provided with a centering adjustment mechanism.

[0016] Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:

[0017] 1. Compared with the prior art, the utility model sets a pair of relatively fixed film-supporting rollers as a pair of film-supporting rollers with adjustable spacing, and changes the spacing between film-supporting rollers I and II through a separation drive mechanism. It can realize that after the film roll on the film-supporting roller has finished laying the film, the core of the film roll is automatically released, and there is no need to manually remove the core. The specific implementation process is that after the film roll on the pair of film-supporting rollers has finished laying the film, the spacing between film-supporting rollers I and film-supporting rollers II is increased so that the spacing is greater than the diameter of the core, and the core falls from the gap between the two film-supporting rollers, realizing the function of automatically removing the core.

[0018] 2. Compared with the prior art, the present invention sets a pair of relatively fixed film support rollers as a pair of film support rollers with a variable spacing. When the diameter of the film roll is large, a pair of film support rollers can be set with a larger spacing to stably support the film roll. As the film roll continues to be unwound, the diameter of the film roll will gradually decrease. At this time, the spacing between the film support rollers can be reduced to continuously provide stable support for the film roll and avoid the film roll from jumping during the unwounding process.

[0019] 3. In the utility model, the two film-supporting rollers move relative to each other at the same time, or one moves while the other does not move, both of which can achieve the purpose of spacing change and adjustment, and can be adaptively set according to the specifications of the film roll. In comparison, the movement of one film-supporting roller relative to the other film-supporting roller can simplify the structure of the separation drive mechanism, and can also simplify the structure of the film-supporting device, which mainly plays the role of releasing the winding core. The use of a cylinder as a separation drive mechanism can quickly release the winding core and reset it. The relative movement of the two film-supporting rollers can ensure the stability of the film when it is rolled and unrolled, and mainly plays the role of stabilizing the film roll.

[0020] 4. In the utility model, the film supporting roller I and the film supporting roller II are connected to the same power source through synchronous belt transmission, which ensures the synchronous movement of the two film supporting rollers on the one hand, and reduces the equipment cost on the other hand. When the film supporting roller II is connected to the same power source through the synchronous belt, the positions of the synchronous pulley II and the tensioning wheel are relatively fixed; when the film supporting roller II moves, the synchronous pulley II and the tensioning wheel move synchronously with the film supporting roller II to form a telescopic structure. Even if the position of the film supporting roller II changes, the tension of the synchronous belt will not change, and power transmission can still be performed. The structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the film supporting and placing mechanism of the utility model;

[0022] Figure 2 This is a diagram showing the use status of the membrane supporting and placing mechanism of the utility model;

[0023] Figure 3 The utility model is a transmission structure in which two film supporting rollers of the film supporting and placing mechanism are connected to the same power source;

[0024] Figure numerals: 1. film supporting frame, 2. film supporting roller I, 3. film supporting roller II, 4. separation driving mechanism, 5. sliding seat, 6. synchronous pulley I, 7. synchronous pulley II, 8. tensioning pulley, 9. synchronous pulley III, 10. synchronous pulley IV, 11. centering adjustment mechanism, 12. power source, 13. film pressing mechanism. DETAILED DESCRIPTION

[0025] The following are exemplary embodiments of the present invention that are combined with the accompanying drawings to help fully understand the claims and their equivalents, wherein the specific details are only considered as exemplary and do not limit the scope of the present invention. Therefore, those of ordinary skill in the art can make various changes and modifications to the embodiments without departing from the scope and spirit of the present invention.

[0026] Example 1

[0027] As a preferred embodiment of the present invention, refer to the attached specification Figure 1 As shown, this embodiment discloses a film supporting mechanism for a packaging machine, including a film supporting frame 1 and film supporting rollers Ⅰ2 and Ⅱ3 assembled on the film supporting frame 1, and also includes a separation drive mechanism 4 for changing the distance between the film supporting rollers Ⅰ2 and Ⅱ3.

[0028] In this embodiment, a pair of relatively fixed film-supporting rollers are set as a pair of film-supporting rollers with adjustable spacing, and the spacing between the film-supporting rollers Ⅰ2 and Ⅱ3 is changed by the separation drive mechanism 4. It can be realized that after the film roll on the film-supporting roller has finished laying the film, the core of the film roll is automatically released, and there is no need to manually remove the core. The specific implementation process is that after the film roll on the pair of film-supporting rollers has finished laying the film, the spacing between the film-supporting rollers Ⅰ2 and Ⅱ3 is increased so that the spacing is greater than the diameter of the core, and the core falls from the gap between the two film-supporting rollers, realizing the function of automatically removing the core.

[0029] In this embodiment, a pair of relatively fixed film support rollers are set as a pair of film support rollers with a variable spacing. When the diameter of the film roll is large, a pair of film support rollers can be set with a larger spacing to stably support the film roll. As the film roll continues to be unwound, the diameter of the film roll will gradually decrease. At this time, the spacing between the film support rollers can be reduced to continuously provide stable support for the film roll and avoid jumping during the film unwounding process.

[0030] As an example of this embodiment, the film supporting roller I2 is connected to a driving motor to rotate, and the film supporting roller II3 is connected to a driving motor to rotate, so as to realize the function of actively releasing the film.

[0031] As another example of this embodiment, the film supporting roller I2 and the film supporting roller II3 can be connected to the same power source 12 via a transmission assembly, and the transmission assembly can be a synchronous belt transmission assembly, a chain transmission assembly or a belt transmission assembly, etc.

[0032] In this embodiment, the separation drive mechanism 4 can change the distance between the film supporting roller I2 and the film supporting roller II3 by driving one of the film supporting rollers to move relative to the other film supporting roller; or it can simultaneously drive the two film supporting rollers to move relative to each other.

[0033] Example 2

[0034] As another preferred embodiment of the utility model, this embodiment is based on the above-mentioned embodiment 1, and further supplements and explains the technical solution of the utility model in detail. Figure 1 and attached Figure 2 As shown, the film supporting roller Ⅰ2 is fixedly assembled relative to the film supporting frame 1, and the film supporting roller Ⅰ2 rotates relative to the film supporting frame 1; the film supporting roller Ⅱ3 is slidably assembled on the film supporting frame 1 through the sliding seats 5 at both ends thereof (the sliding seat 5 is assembled on the film supporting frame 1 through the slide rail), and the film supporting roller Ⅱ3 rotates relative to the sliding seat 5; the sliding seat 5 is connected to the separation driving mechanism 4, and the separation driving mechanism 4 drives the sliding seat 5 to slide on the film supporting frame 1, and the sliding seat 5 drives the film roller Ⅱ to approach or move away from the film supporting roller Ⅰ2 to change the distance between the film supporting roller Ⅰ2 and the film supporting roller Ⅱ3.

[0035] As an example, the separation drive mechanism 4 is a cylinder. Among them, the specific structure of the separation drive mechanism 4 can be selected according to actual needs, and is not limited to the cylinder. Other drive structures can also be selected, such as a motor + screw nut transmission substructure, a motor + gear rack transmission substructure, or a motor + synchronous belt transmission substructure. The use of a cylinder can achieve rapid action, rapid reciprocating operation between two points, and can quickly release the core and reset. The use of a motor drive structure can achieve adjustment of any point to achieve adjustment of any distance between the two film support rollers (within the adjustment range), which can adapt to changes in the diameter of the film roll during the film rolling and unwinding process, mainly to stabilize the film roll and supplemented by releasing the core.

[0036] As an example, as shown in the attached manual Figure 1 As shown, two cylinders are provided as the separation driving mechanism 4, and the two cylinders are respectively connected to the sliding seats 5 at both ends of the film supporting roller II 3.

[0037] Example 3

[0038] As another preferred embodiment of the utility model, this embodiment is based on the above-mentioned embodiment 1, and further supplements and elaborates on the technical solution of the utility model in detail. This embodiment shows a specific implementation scheme (not shown in the figure) for two film-supporting rollers to move relative to each other at the same time. Specifically, the film-supporting roller Ⅰ2 and the film-supporting roller Ⅱ3 both slide relative to the film-supporting frame 1, that is, the film-supporting roller Ⅰ2 and the film-supporting roller Ⅱ3 are both slidably assembled on the film-supporting frame 1 through the sliding seats 5 at both ends thereof; the film-supporting roller Ⅰ2 and the film-supporting roller Ⅱ3 are both connected to the separation drive mechanism 4, and the separation drive mechanism 4 drives the film-supporting roller Ⅰ2 and the film-supporting roller Ⅱ3 to move relatively close to or away from each other, so as to change the distance between the film-supporting roller Ⅰ2 and the film-supporting roller Ⅱ3.

[0039] As an implementation of this embodiment, the separation drive mechanism 4 includes a drive motor assembly and a transmission assembly, the drive motor assembly is connected to the transmission assembly, and the drive motor assembly is driven by the transmission assembly to change the distance between the film supporting roller I 2 and the film supporting roller II 3. The drive motor assembly is a servo motor + reducer.

[0040] As an example, the transmission assembly is a screw-nut transmission pair, a synchronous belt transmission pair or a gear rack transmission pair. The screw in the screw-nut transmission pair is a reverse threaded screw with two nuts; in the synchronous belt transmission pair, the sliding seat 5 of the film support roller Ⅰ2 is fixed on the synchronous belt on one side, and the sliding seat 5 of the film support roller Ⅱ3 is fixed on the synchronous belt on the other side. Two groups of gear rack transmission pairs are set, one group is connected to the sliding seat 5 of the film support roller Ⅰ2, and the other group is connected to the sliding seat 5 of the film support roller Ⅱ3. Other transmission pair structures that can realize the functions of this solution can also be selected.

[0041] Example 4

[0042] As another preferred embodiment of the utility model, this embodiment is based on the above-mentioned embodiment 1, embodiment 2 or embodiment 3, and further supplements and explains the technical solution of the utility model in detail. Figure 3 As shown, the film supporting roller I2 and the film supporting roller II3 are connected to the same power source 12 through a synchronous belt transmission, and the power source 12 drives the film supporting roller I2 and the film supporting roller II3 to rotate synchronously. The power source 12 is a servo motor, a synchronous motor, etc.

[0043] As an example, under the condition that the film supporting roller Ⅱ3 moves and the film supporting roller Ⅰ2 is fixed, a synchronous pulley Ⅱ7 is arranged at the end of the film supporting roller Ⅱ3, and a tensioning pulley 8 is arranged at the end of the sliding seat 5 of the film supporting roller Ⅱ3, and the positions of the synchronous pulley Ⅱ7 and the tensioning pulley 8 are relatively fixed; when the film supporting roller Ⅱ3 moves, the synchronous pulley Ⅱ7 and the tensioning pulley 8 move synchronously with the film supporting roller Ⅱ3; a synchronous pulley Ⅰ6 is arranged at the end of the film supporting roller Ⅰ2, and a synchronous pulley Ⅲ9 is arranged on the output shaft of the power source 12, and the synchronous belt is wrapped around the synchronous pulley Ⅲ9, the tensioning pulley 8, the synchronous pulley Ⅱ7 and the synchronous pulley Ⅰ6.

[0044] Under the condition that the film supporting roller II3 moves and the film supporting roller I2 is fixed, a synchronous pulley IV10 can be added on one side of the film supporting roller I2 to increase the tension of the synchronous belt and increase it based on its reversing requirements.

[0045] As another example, under the condition of relative movement between the film supporting roller Ⅰ2 and the film supporting roller Ⅱ3, the synchronous pulley on the film supporting roller Ⅱ3 still adopts the above-mentioned method, except that a synchronous pulley Ⅳ10 is added to the sliding seat 5 of the film supporting roller Ⅰ2, and the positions of the synchronous pulley Ⅳ10 and the synchronous pulley Ⅰ6 are relatively fixed; the synchronous belt is wrapped around the synchronous pulley Ⅲ9, the tensioning pulley 8, the synchronous pulley Ⅱ7, the synchronous pulley Ⅰ6 and the synchronous pulley Ⅳ10.

[0046] Similarly, the above-mentioned synchronous belt and synchronous pulley can be replaced by a chain and a sprocket, or a belt and a pulley.

[0047] Further preferably, the film support rollers Ⅰ2 and Ⅱ3 are provided with a centering adjustment mechanism 11. The centering adjustment mechanism 11 is an existing structure, and this application will not repeat it. Figure 1 and attached Figure 2 As shown, a film pressing mechanism 13 may also be provided to assist in film placement.

[0048] While the inventive concept has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of the invention as defined in the claims.

Claims

1. A film supporting mechanism for a packaging machine, comprising a film supporting frame (1) and a film supporting roller I (2) and a film supporting roller II (3) mounted on the film supporting frame (1), characterized in that: It also includes a separation drive mechanism (4) for changing the distance between the film supporting roller I (2) and the film supporting roller II (3).

2. A film placing mechanism for a packaging machine as claimed in claim 1, characterized in that: The film supporting roller I (2) is fixedly mounted relative to the film supporting frame (1), and the film supporting roller I (2) rotates relative to the film supporting frame (1); the film supporting roller II (3) is slidably mounted on the film supporting frame (1) via sliding seats (5) at both ends thereof, and the film supporting roller II (3) rotates relative to the sliding seats (5); the sliding seats (5) are connected to the separation driving mechanism (4), and the separation driving mechanism (4) drives the sliding seats (5) to slide on the film supporting frame (1), and the sliding seats (5) drive the film supporting roller II to approach or move away from the film supporting roller I (2), so as to change the distance between the film supporting roller I (2) and the film supporting roller II (3).

3. A film placing mechanism for a packaging machine as claimed in claim 1 or 2, characterized in that: The separation drive mechanism (4) is a cylinder.

4. The film placing mechanism for a packaging machine according to claim 1, characterized in that: The film supporting roller I (2) and the film supporting roller II (3) both slide relative to the film supporting frame (1), and the film supporting roller I (2) and the film supporting roller II (3) are both connected to the separation driving mechanism (4), and the separation driving mechanism (4) drives the film supporting roller I (2) and the film supporting roller II (3) to move closer to or farther away from each other, so as to change the distance between the film supporting roller I (2) and the film supporting roller II (3).

5. A film placing and supporting mechanism for a packaging machine as claimed in claim 1, 2 or 4, characterized in that: The separation drive mechanism (4) comprises a drive motor assembly and a transmission assembly. The drive motor assembly is connected to the transmission assembly. The drive motor assembly is driven by the transmission assembly to change the distance between the film supporting roller I (2) and the film supporting roller II (3).

6. A film placing mechanism for a packaging machine as claimed in claim 5, characterized in that: The transmission assembly is a screw-nut transmission pair, a synchronous belt transmission pair or a gear rack transmission pair.

7. A film placing and supporting mechanism for a packaging machine as claimed in claim 1, 2 or 4, characterized in that: The film supporting roller I (2) and the film supporting roller II (3) are connected to the same power source (12) via a synchronous belt drive, and the power source (12) drives the film supporting roller I (2) and the film supporting roller II (3) to rotate synchronously.

8. A film placing mechanism for a packaging machine as claimed in claim 7, characterized in that: A synchronous pulley II (7) is arranged at the end of the film supporting roller II (3), and a tensioning wheel (8) is arranged at the end of the sliding seat (5) of the film supporting roller II (3), and the positions of the synchronous pulley II (7) and the tensioning wheel (8) are relatively fixed; when the film supporting roller II (3) moves, the synchronous pulley II (7) and the tensioning wheel (8) move synchronously with the film supporting roller II (3); a synchronous pulley I (6) is arranged at the end of the film supporting roller I (2), and a synchronous pulley III (9) is arranged on the output shaft of the power source (12), and the synchronous belt is wound around the synchronous pulley III (9), the tensioning wheel (8), the synchronous pulley II (7) and the synchronous pulley I (6).

9. A film placing mechanism for a packaging machine as claimed in claim 8, characterized in that: It also includes a synchronous pulley IV (10), wherein the positions of the synchronous pulley IV (10) and the synchronous pulley I (6) are relatively fixed; the synchronous belt is wound around the synchronous pulley III (9), the tensioning wheel (8), the synchronous pulley II (7), the synchronous pulley I (6) and the synchronous pulley IV (10).

10. A film placing and supporting mechanism for a packaging machine as claimed in claim 1, 2 or 4, characterized in that: The film supporting roller I (2) and the film supporting roller II (3) are provided with a centering adjustment mechanism (11).

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