An automatic film roll changing mechanism

Abstract

This utility model relates to the field of packaging machine technology, specifically disclosing an automatic film roll changing mechanism, including: a gripping component, which includes a connecting rod, a top core shaft, a locking mechanism, and a first return spring; and a film roll loading and unloading component, which includes an upper film piece, a lower film piece, and a clamping rod; the connecting rod has a first movable hole, a spring hole, and a limiting hole with gradually increasing diameter from top to bottom, and the first return spring is installed in the spring hole; by different positions of the top core shaft and the rotating block in the gripping component, in conjunction with the arrangement of the upper and lower film pieces, when the guide rod contacts the top block and causes the push rod to retract and move upward, the film roll core falls off the connecting rod to the storage rod, completing the film removal; when the gripping component presses the movable cylinder into the interior of the fixed cylinder in the film roll core, the rotating block will open under the action of the tension spring, thereby placing the film roll on the bearing part of the rotating block, completing the automatic film changing.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, and specifically to an automatic film roll changing mechanism. Background Technology

[0002] Currently, ring-type stretch film packaging machines cannot automatically change film rolls, requiring manual operation and making the process complex, thus hindering the machine's ability to handle high-speed operations. Therefore, there is an urgent need for an automatic film roll changing mechanism to make film roll replacement more convenient. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic film roll changing mechanism.

[0004] The automatic film roll changing mechanism of this utility model includes:

[0005] The gripping component includes a plug rod, a top core shaft, a locking mechanism, and a first return spring.

[0006] A membrane roll loading and unloading component, comprising an upper membrane component, a lower membrane component, and a membrane clamping rod;

[0007] The plug rod has a first movable hole, a spring hole, and a limiting hole with gradually increasing diameter from top to bottom, and the first reset spring is installed in the spring hole;

[0008] The top mandrel includes, from top to bottom, a movable rod, a limiting block, and a push rod, with the movable rod inserted into the first reset spring and the first movable hole, and the limiting block inserted into the limiting hole;

[0009] The latching mechanism includes a latching block installed at the bottom of the plug rod. The latching block has a second movable hole for the push rod to move through. The diameter of the second movable hole is smaller than the outer diameter of the limiting block.

[0010] The bottom of the snap-fit ​​block is provided with a mounting groove that communicates with the second movable hole. Rotating blocks are rotatably connected to the inner walls on both sides of the mounting groove. Fitting grooves that are adapted to the rotating blocks are provided at both ends of the mounting groove. The two rotating blocks are connected by a tension spring. An expansion hole that is adapted is formed between the two rotating blocks and the tension spring.

[0011] The push rod is inserted into the expansion hole, and the rotating block is in a horizontal state under the interaction of the push rod and the tension spring. At this time, the rotating block protrudes locally from the edge of the snap-fit ​​block to form a bearing part.

[0012] The top of the rotating block near the push rod is circular.

[0013] In some embodiments, the upper film component includes a fixed cylinder and a movable cylinder. The diameter of the movable cylinder is smaller than the inner diameter of the film roll core, and the movable cylinder is movably inserted into the fixed cylinder. A second return spring is installed between the bottom of the movable cylinder and the bottom of the inner wall of the fixed cylinder. A bearing ring is fixedly connected to the top of the fixed cylinder, and the bearing ring and the surface of the movable cylinder form a rotating cavity for the rotation of the rotating block.

[0014] The lower membrane component includes a storage rod, and a top block is fixedly connected to the top of the storage rod.

[0015] In some embodiments, the bottom side of the rotating block that contacts the push rod when it is horizontal is provided as a pushing part.

[0016] In some embodiments, a guide rod is fixedly connected to the bottom of the push rod, the cross-section of the guide rod is smaller than that of the push rod, and a guide slope is provided between the guide rod and the push rod.

[0017] In some embodiments, the top of the plug rod is provided with a mounting ring groove, in which a pressure block and a clamping spring are movably sleeved on the plug rod, and the clamping spring is installed between the top of the mounting ring groove and the top of the pressure block.

[0018] In some embodiments, the distance 'a' between the bottom of the mounting ring groove and the bearing portion of the protruding snap block edge is less than the length of the membrane roll, and the movable length of the pressure block in the mounting ring groove plus the distance 'a' is greater than the length of the membrane roll.

[0019] In some embodiments, an annular groove is provided in the center of the plug rod.

[0020] In some embodiments, an automatic film feeding mechanism is also included. The automatic film feeding mechanism includes a base, a movable base is slidably connected to the base, and a feeding platform is rotatably connected to the movable base via a rotating shaft or a slewing bearing. The film roll loading and unloading components are in several groups and are evenly installed around the edge of the feeding platform.

[0021] The movable base is driven by a linear cylinder, and the feeding platform is driven by a motor.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This invention utilizes the different positions of the top core shaft and rotating block in the gripping component, along with the arrangement of the upper and lower film components. When the guide rod in the top core shaft of the gripping component contacts the top block and the push rod retracts and moves upward, the film roll core is pushed from the insertion rod to the storage rod under the push of the compression spring, completing the film removal. When the gripping component presses the movable cylinder into the interior of the fixed cylinder in the film roll core, the rotating block will open under the action of the tension spring, thereby placing the film roll on the bearing part of the rotating block, completing the automatic film replacement. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a cross-section and structural schematic diagram of the gripping component of this utility model;

[0026] Figure 2 This is a front sectional view of the clamping mechanism of the gripping component of this utility model after gripping the film roll;

[0027] Figure 3 This is a front sectional view of the gripping component of this utility model during material unloading;

[0028] Figure 4 This is a schematic diagram of the structure of the gripping component of this utility model during material loading;

[0029] Figure 5 This is a bottom view of the gripping component of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the film roll loading and unloading component of this utility model;

[0031] Figure 7 This is a schematic diagram of the automatic film supply mechanism of this utility model.

[0032] In the diagram: 5. Grasping component;

[0033] 51. Connecting rod; 511. First movable hole; 512. Limiting hole; 513. Spring hole; 514. Mounting ring groove; 515. Pressure block; 516. Compression spring; 517. Spacing a;

[0034] 52. Top spindle; 521. Movable rod; 522. Limiting block; 523. Push rod; 524. Guide rod;

[0035] 53. First return spring;

[0036] 54. Snap-fit ​​mechanism; 541. Second movable hole; 542. Mounting groove; 543. Rotating block; 5431. Bearing part; 5432. Pushing part; 544. Expansion hole; 545. Tension spring; 546. Fitting groove; 547. Snap-fit ​​block;

[0037] 6. Membrane roll loading and unloading components; 61. Upper membrane component; 611. Fixed cylinder; 612. Movable cylinder; 613. Bearing ring; 614. Rotating cavity; 62. Lower membrane component; 621. Storage rod; 622. Top block; 63. Clamping rod;

[0038] 7. Automatic film feeding mechanism; 71. Base; 72. Feeding platform; 73. Moving base; 74. Linear cylinder. Detailed Implementation

[0039] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0040] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] Example 1:

[0042] Please see Figures 1-5 The automatic film roll changing mechanism of this utility model includes:

[0043] The gripping component 5 includes a plug rod 51, a top core shaft 52, a snap-fit ​​mechanism 54, and a first return spring 53.

[0044] The membrane roll loading and unloading component 6 includes an upper membrane component 61, a lower membrane component 62, and a membrane clamping rod 63.

[0045] The plug rod 51 has a first movable hole 511 with a gradually increasing diameter, a spring hole 513 and a limiting hole 512 from top to bottom, and the first return spring 53 is installed in the spring hole 513.

[0046] The top spindle 52 includes, from top to bottom, a movable rod 521, a limiting block 522 and a push rod 523. The movable rod 521 is inserted into the first reset spring 53 and the first movable hole 511, and the limiting block 522 is inserted into the limiting hole 512.

[0047] The snap-fit ​​mechanism 54 includes a snap-fit ​​block 547 installed at the bottom of the plug-in rod 51. The snap-fit ​​block 547 has a second movable hole 541 for the push rod 523 to move through. The diameter of the second movable hole 541 is smaller than the outer diameter of the limit block 522.

[0048] The bottom of the snap-fit ​​block 547 is provided with a mounting groove 542 that communicates with the second movable hole 541. Rotating blocks 543 are rotatably connected to the inner walls on both sides of the mounting groove 542. The two ends of the mounting groove 542 are provided with fitting grooves 546 that are adapted to the rotating blocks 543. The two rotating blocks 543 are connected by a tension spring 545. An expansion hole 544 is formed between the two rotating blocks 543 and the tension spring 545.

[0049] The push rod 523 is inserted into the expansion hole 544. The rotating block 543 is in a horizontal state under the interaction of the push rod 523 and the tension spring 545. At this time, the rotating block 543 protrudes part of the edge of the snap-fit ​​block 547 to form a bearing part 5431.

[0050] The top of the rotating block 543 near the push rod 523 is circular.

[0051] The upper membrane component 61 includes a fixed cylinder 611 and a movable cylinder 612. The diameter of the movable cylinder 612 is smaller than the inner diameter of the membrane roll core, and the movable cylinder 612 is movably inserted into the fixed cylinder 611. A second return spring is installed between the bottom of the movable cylinder 612 and the bottom of the inner wall of the fixed cylinder 611. A bearing ring 613 is fixedly connected to the top of the fixed cylinder 611. The bearing ring 613 and the surface of the movable cylinder 612 form a rotating cavity 614 for the rotation of the rotating block 543. The movable cylinder 612 can be completely hidden inside the fixed cylinder 611 after being compressed.

[0052] The lower film component 62 includes a storage rod 621, and a top block 622 is fixedly connected to the top of the storage rod 621.

[0053] When the rotating block 543 is horizontal, the bottom side of the side that contacts the push rod 523 is designated as the pushing part 5432.

[0054] A guide rod 524 is fixedly connected to the bottom of the push rod 523. The cross-section of the guide rod 524 is smaller than that of the push rod 523, and a guide slope is provided between the guide rod 524 and the push rod 523.

[0055] The top of the plug rod 51 is provided with a mounting ring groove 514. A pressure block 515 and a compression spring 516 are movably sleeved on the plug rod 51 in the mounting ring groove 514. The compression spring 516 is installed between the top of the mounting ring groove 514 and the top of the pressure block 515.

[0056] The length of the distance a517 between the bottom of the mounting ring groove 514 and the bearing portion 5431 of the protruding snap block 547 edge is less than the length of the membrane roll, and the movable length of the pressure block 515 in the mounting ring groove 514 plus the distance a517 is greater than the length of the membrane roll.

[0057] An annular groove is provided in the center of the insertion rod 51 to facilitate the film roll to slide off the insertion rod 51.

[0058] Working principle:

[0059] S1, please refer to Figure 2 When the membrane roll is working normally, the top core shaft 52 protrudes from the bottom of the limiting block 522, and the push rod 523 of the top core shaft 52 is inserted into the expansion hole 544. At this time, the rotating block 543 is in a horizontal state under the interaction of the top core shaft 52 and the tension spring 545. The membrane roll is placed on the bearing part 5431 of the rotating block 543, and the top of the membrane roll is pressed by the pressure block 515 under the action of the pressure spring 516 to prevent the membrane roll from rotating relative to the membrane roll shaft.

[0060] S2, please refer to Figure 3 When the film roll is used up, the gripping component 5 installed on the packaging machine moves to above the lower film piece 62 and then descends vertically. When the guide rod 524 in the top core shaft 52 contacts the top block 622 and causes the push rod 523 to retract and move upward, the expansion hole 544 shrinks under the action of the tension spring 545 because the diameter of the guide rod 524 is smaller than that of the push rod 523. The rotating block 543 then rotates downward under the action of the tension spring 545. The film roll core falls off the insertion rod 51 onto the storage rod 621 under the push of the compression spring 516, thus completing the film removal.

[0061] S3, please refer to Figure 4 After the used film roll core falls onto the storage rod 621, the gripping component 5 rises a short distance. Then, the gripping component 5 or the upper film component 61 moves to the same axis, and then the gripping component 5 descends. When the bearing part 5431 in the horizontal rotating block 543 contacts the top of the film roll and is subjected to force, it receives an upward thrust. With the circular structure of the rotating block 543, it can rotate upward into the fitting groove 546, so that the film roll core can be inserted normally into the film roll core. When it contacts the movable cylinder 612 of the upper film component 61, it will press the movable cylinder 612 down into the interior of the fixed cylinder 611, and the snap-fit ​​mechanism 54 will be located in the rotating cavity 614 formed by the bearing ring 613 below the film roll. When there is no restriction on the outside of the rotating block 543 in the rotating cavity 614, the rotating block 543 will open under the action of the tension spring 545, thereby placing the film roll on the bearing part 5431 of the rotating block 543, completing the automatic film replacement.

[0062] Example 2:

[0063] Please see Figure 7As a further improvement to Embodiment 1, unlike Embodiment 1, it also includes an automatic film feeding mechanism 7. The automatic film feeding mechanism 7 includes a base 71, a movable base 73 slidably connected to the base 71, and a feeding platform 72 rotatably connected to the movable base 73 via a rotating shaft or a slewing bearing. The film roll loading and unloading components 6 are in several groups and are evenly installed around the edge of the feeding platform 72. The movable base 73 is driven by a linear cylinder 74, and the feeding platform 72 is driven by a motor.

[0064] Working principle:

[0065] S2.1 When the film roll on the gripping component 5 is used up, the film roll loading and unloading component 6, driven by the linear cylinder 74, moves the feeding platform 72 on the base 71 to below the gripping component 5 via the moving base 73.

[0066] S3.1 After the used film roll core falls onto the storage rod 621 through the steps in Example 1, the gripping component 5 rises a short distance, and then the feeding platform 72 rotates under the drive of the motor. The rotation of the feeding platform 72 will move the upper film piece 61 to directly below the gripping component 5.

[0067] That is, it can automatically feed the film rolls for the gripping component 5.

[0068] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A film roll automatic changing mechanism characterized by comprising: include: The gripping component (5) includes a plug rod (51), a top core shaft (52), a snap-fit ​​mechanism (54), and a first return spring (53); The membrane roll loading and unloading component (6) includes an upper membrane component (61), a lower membrane component (62), and a membrane clamping rod (63); The plug rod (51) has a first movable hole (511), a spring hole (513) and a limiting hole (512) with gradually increasing diameter from top to bottom, and the first reset spring (53) is installed in the spring hole (513); The top core shaft (52) includes, from top to bottom, a movable rod (521), a limiting block (522) and a push rod (523), and the movable rod (521) is inserted into the first return spring (53) and the first movable hole (511), and the limiting block (522) is inserted into the limiting hole (512). The snap-fit ​​mechanism (54) includes a snap-fit ​​block (547) installed at the bottom of the plug rod (51). The snap-fit ​​block (547) has a second movable hole (541) for the push rod (523) to move through. The diameter of the second movable hole (541) is smaller than the outer diameter of the limiting block (522). The bottom of the snap-fit ​​block (547) is provided with a mounting groove (542) communicating with the second movable hole (541). Rotating blocks (543) are rotatably connected to the inner walls on both sides of the mounting groove (542). Fitting grooves (546) adapted to the rotating blocks (543) are provided at both ends of the mounting groove (542). The two rotating blocks (543) are connected by a tension spring (545). An expansion hole (544) adapted to the two rotating blocks (543) and the tension spring (545) is formed between them. The push rod (523) is inserted into the expansion hole (544), and the rotating block (543) is in a horizontal state under the interaction of the push rod (523) and the tension spring (545). At this time, the rotating block (543) protrudes from the edge of the snap-fit ​​block (547) to form a bearing part (5431). The rotating block (543) is circular on the top side near the push rod (523).

2. The automatic film roll changing mechanism according to claim 1, characterized in that: The upper film component (61) includes a fixed cylinder (611) and a movable cylinder (612). The diameter of the movable cylinder (612) is smaller than the inner diameter of the film roll core, and the movable cylinder (612) is movably inserted into the fixed cylinder (611). A second return spring is installed between the bottom of the movable cylinder (612) and the bottom of the inner wall of the fixed cylinder (611). A bearing ring (613) is fixedly connected to the top of the fixed cylinder (611). The bearing ring (613) and the surface of the movable cylinder (612) form a rotating cavity (614) for the rotation of the rotating block (543). The lower film component (62) includes a storage rod (621), and a top block (622) is fixedly connected to the top of the storage rod (621).

3. The automatic film roll changing mechanism according to claim 1, characterized in that: When the rotating block (543) is horizontal, the bottom of the side that contacts the push rod (523) is provided as a pushing part (5432).

4. The automatic film roll changing mechanism of claim 1, wherein: The bottom of the push rod (523) is fixedly connected to a guide rod (524). The cross-section of the guide rod (524) is smaller than that of the push rod (523), and a guide slope is provided between the guide rod (524) and the push rod (523).

5. The automatic film roll changing mechanism of claim 1, wherein: The top of the plug rod (51) is provided with an installation ring groove (514), and a pressure block (515) and a compression spring (516) are installed in the installation ring groove (514) and are movably sleeved on the plug rod (51). The compression spring (516) is installed between the top of the installation ring groove (514) and the top of the pressure block (515).

6. The automatic film roll changing mechanism according to claim 5, characterized in that: The length of the distance a (517) between the bottom of the mounting ring groove (514) and the bearing portion (5431) of the edge of the protruding snap block (547) is less than the length of the film roll, and the length of the movement of the pressure block (515) in the mounting ring groove (514) plus the distance a (517) is greater than the length of the film roll.

7. The automatic film roll changing mechanism of claim 1, wherein: The plug rod (51) has an annular groove in the center.

8. The automatic film roll changing mechanism of claim 1, wherein: It also includes an automatic film feeding mechanism (7), which includes a base (71), a movable base (73) slidably connected to the base (71), and a feeding platform (72) rotatably connected to the movable base (73) via a rotating shaft or a slewing bearing. The film roll loading and unloading components (6) are in several groups and are evenly installed around the edge of the feeding platform (72). The movable base (73) is driven by a linear cylinder (74), and the feeding platform (72) is driven by a motor.

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