Film cutting mechanism of strapping machine

Abstract

The utility model relates to a film cutting mechanism of a strapping machine, which comprises a shell installed at a packing opening of the strapping machine, the top of the shell is fixedly connected with the strapping machine through a linear driver, a groove is arranged at the bottom of the shell, a welding head used for welding a ribbon is connected in the groove in a sliding mode, and the welding head is connected with the shell in a sliding mode. A film cutting knife is arranged on the side, located on the welding head, of the groove, a gap is reserved between the film cutting knife and the welding head, and a protection assembly is arranged between the film cutting knife and the welding head. The utility model relates to the technical field of strapping machines. According to the film cutting mechanism of the strapping machine, through the arranged welding head, the overlapped part of a binding belt can be heated when the binding belt is cut off by the film cutting knife, so that the binding belt is welded together, the step flow of box packaging is reduced, the packaging efficiency of the strapping machine is improved, and the practicability of the film cutting mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of strapping machines, in particular to a film cutting mechanism of a strapping machine. Background Art

[0002] The fully automatic strapping machine is the final step of packaging, which is to strap the cartons with strapping tape to prevent them from scattering during transportation. The automatic strapping machine has many advantages. The straps made by the cartons are beautiful and firm, and the speed is very fast, which improves the workers' packaging efficiency. At the same time, it reduces waste and saves costs.

[0003] In the prior art, after the strapping machine completes the packaging, the strapping tape needs to be cut off before the carton can be taken out. In order to ensure that the strapping tape still has sufficient connection strength to fix the carton after being cut off, the cuts of the strapping tape are usually welded together after being cut off. This will result in a welding step being required after the packaging is completed, which will reduce the packaging efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a film cutting mechanism for a strapping machine so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A film cutting mechanism for a strapping machine comprises a shell installed at a strapping port of the strapping machine, the top of the shell being fixedly connected to the strapping machine via a linear drive, the bottom of the shell being provided with a groove, a welding head for welding cable ties being slidably connected in the groove, a film cutting knife being provided on one side of the welding head, a gap being left between the film cutting knife and the welding head, and a protective component being provided between the film cutting knife and the welding head.

[0007] Furthermore, the protective component includes a connecting plate, a compression spring and a contact switch. The top of the film cutting knife is fixedly connected to the groove through the connecting plate, the bottom of the connecting plate is fixedly connected with a compression spring, the top of the welding head is provided with a circular groove for placing the compression spring, and the bottom of the connecting plate is connected to a contact switch on the side away from the film cutting knife.

[0008] Furthermore, the contact switch is composed of a connecting block, a positioning block, a pressure plate and a switch body, the top of the connecting block is fixedly connected to the connecting plate, one side of the bottom of the connecting block is fixedly connected to the switch body, the top of the welding head is located on both sides of the connecting block and a positioning block and a pressure plate are respectively provided, wherein the pressure plate is located on one side of the connecting block where the switch body is provided, and the positioning block is provided on the other side of the connecting block and contacts with the connecting block.

[0009] Furthermore, a pressing portion is formed by a protrusion on the top of an outer wall of one side of the pressing plate close to the switch body, and a transition slope is provided between the bottom of the pressing portion and the pressing plate.

[0010] Furthermore, a slider is fixedly connected to one side of the film cutting knife close to the welding head, and a slide groove for connecting the slider is opened from bottom to top at the bottom of the welding head, and the slide groove does not penetrate the welding head.

[0011] Furthermore, when the slider is located at the top of the slide groove, the switch body is in contact with the extrusion portion, and the bottom of the film cutting knife is higher than the bottom of the welding head.

[0012] In summary, the present invention includes at least one of the following beneficial technical effects:

[0013] 1. The film cutting mechanism of the strapping machine can heat the overlapping part of the cable tie when the film cutting knife cuts the cable tie through the welding head, so that the cable tie is welded together, thereby reducing the steps of box packaging, improving the packaging efficiency of the strapping machine, and increasing the practicality of the cutting mechanism;

[0014] 2. The film cutting mechanism of the strapping machine can improve the effect of the welding head welding the cable tie through the provided protective component, make the connection of the cable tie more stable, further improve the strapping effect of the strapping machine, and at the same time prevent the welding head from heating the cable tie for a long time and causing the cable tie to melt, thereby ensuring the strapping stability of the strapping machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The utility model is a structural schematic diagram of a film cutting mechanism of a strapping machine.

[0017] Figure 2 The utility model is a schematic diagram of the internal structure of a film cutting mechanism of a strapping machine.

[0018] Figure 3 The utility model is a schematic diagram of the structure of a contact switch in a film cutting mechanism of a strapping machine.

[0019] In the figure, 1. shell; 2. groove; 3. welding head; 4. film cutting knife; 5. protection component; 51. connecting plate; 52. compression spring; 53. contact switch; 531. connecting block; 532. positioning block; 533. pressure plate; 534. switch body; 6. circular groove; 7. extrusion part; 8. slider; 9. slide groove. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] Example:

[0022] Reference Figure 1 - Figure 3 The utility model discloses a film cutting mechanism for a strapping machine, comprising a shell 1 installed at the strapping port of the strapping machine, the top of the shell 1 is fixedly connected to the strapping machine through a linear drive, a groove 2 is provided at the bottom of the shell 1, a welding head 3 for welding cable ties is slidably connected in the groove 2, a film cutting knife 4 is provided on one side of the welding head 3 of the groove 2, a gap is left between the film cutting knife 4 and the welding head 3, and a protective component 5 is provided between the film cutting knife 4 and the welding head 3.

[0023] In this embodiment, after the strapping machine completes packing the cartons, the shell 1 is pushed close to the cable tie by the linear drive. As the shell 1 gradually approaches the cable tie, the welding head 3 at the bottom of the shell 1 will preferentially contact the cable tie, and then the overlapping parts of the cable tie are melted together by the heat of the welding head 3.

[0024] When the welding head 3 is welding the cable tie, the housing 1 will continue to move downward under the movement of the linear drive. At this time, the welding head 3 cannot move downward because of the obstruction of the carton, so the welding head 3 is pressed into the groove 2. At this time, the contact switch 53 is triggered to disconnect the welding head 3 to prevent the welding head 3 from heating the cable tie for a long time and causing the cable tie to melt. At the same time as the contact switch 53 disconnects the welding head 3, the film cutting knife 4 will gradually cut the cable tie. Since the cable tie has been hot-melted after being cut, it will not loosen and cause the carton to scatter, which can effectively improve the packaging efficiency of the strapping machine.

[0025] The linear actuator may be a telescopic motor or a hydraulic press or other telescopic driving member.

[0026] In a further preferred embodiment of the present invention, Figure 2 As shown, the protective component 5 includes a connecting plate 51, a compression spring 52 and a contact switch 53. The top of the film cutting knife 4 is fixedly connected to the groove 2 through the connecting plate 51, and the bottom of the connecting plate 51 is fixedly connected with the compression spring 52. A circular groove 6 for placing the compression spring 52 is provided on the top of the welding head 3, and the bottom of the connecting plate 51 is connected to the contact switch 53 on the side away from the film cutting knife 4.

[0027] In this embodiment, the welding head 3 will generate a large amount of heat to melt the overlapping parts of the cable ties during use. Therefore, in order to achieve a better welding effect between the cable ties, the welding head 3 needs to apply pressure to the cable ties when in contact with the cable ties. Therefore, a compression spring 52 is arranged between the welding head 3 and the connecting plate 51. The elastic force applied by the compression spring 52 can push the welding head 3 to press the cable ties tightly together, which can effectively improve the quality of welding.

[0028] However, if the welding head 3 is in contact with the cable tie for a long time, the overlapping part of the cable tie will melt, which will affect the packaging of the strapping machine. Therefore, a contact switch 53 is provided to prevent the welding head 3 from heating up for a long time and melting the cable tie, which can effectively improve the packaging quality of the strapping machine and prevent the welding head 3 from melting the cable tie and affecting the packaging efficiency.

[0029] In a further preferred embodiment of the present invention, Figure 3 As shown, the contact switch 53 is composed of a connecting block 531, a positioning block 532, a pressure plate 533 and a switch body 534. The top of the connecting block 531 is fixedly connected to the connecting plate 51, and the switch body 534 is fixedly connected to one side of the bottom of the connecting block 531. The top of the welding head 3 is located on both sides of the connecting block 531, and a positioning block 532 and a pressure plate 533 are respectively provided. The pressure plate 533 is located on one side of the connecting block 531 where the switch body 534 is provided, and the positioning block 532 is provided on the other side of the connecting block 531 and contacts with the connecting block 531.

[0030] In this embodiment, the provided pressure plate 533 can be used to squeeze the switch body 534 to heat the welding head 3, and the welding head 3 can be used to weld the cable ties together. When the switch body 534 is squeezed, the connecting block 531 connected to the switch body 534 will also be squeezed, causing the connecting block 531 to shift, thereby increasing the distance between the switch body 534 and the pressure plate 533, thereby affecting the triggering stability of the switch body 534.

[0031] Therefore, in order to ensure the contact stability of the switch body 534, a positioning block 532 is provided on the side of the connecting block 531 away from the switch body 534. The positioning block 532 can limit the movement of the connecting block 531 to prevent the connecting block 531 from being offset.

[0032] In a further preferred embodiment of the present invention, Figure 3 As shown, a pressing portion 7 is formed on the top of the outer wall of one side of the pressing plate 533 close to the switch body 534 , and a transition slope is provided between the bottom of the pressing portion 7 and the pressing plate 533 .

[0033] In this embodiment, because the switch body 534 will cause the welding head 3 to heat up and weld the cable tie together after being squeezed, but the welding head 3 cannot heat the cable tie for a long time, an extrusion portion 7 for squeezing the switch body 534 is provided on one side of the pressure plate 533, so that when the welding head 3 is pressed into the groove 2 under the support of the box, the extrusion portion 7 is separated from the switch body 534, so that the welding head 3 stops heating to avoid the cable tie from being melted due to long-term heat, and a transition slope is provided between the bottom of the extrusion portion 7 and the pressure plate 533, so that the damage to the switch body 534 can be reduced when the welding head 3 is reset.

[0034] In a further preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, a slider 8 is fixedly connected to one side of the film cutting knife 4 close to the welding head 3 , and a slide groove 9 for connecting the slider 8 is provided from bottom to top at the bottom of the welding head 3 , and the slide groove 9 does not penetrate the welding head 3 .

[0035] In this embodiment, since a compression spring 52 is arranged between the welding head 3 and the connecting plate 51, and the welding head 3 will naturally fall under the action of gravity, in order to prevent the welding head 3 from falling out of the groove 2, a slide groove 9 that does not penetrate the welding head 3 is opened on one side of the welding head 3, and at the same time, a slider 8 inserted into the slide groove 9 is connected to the side wall of the film cutting knife 4, and the slider 8 can provide support for the welding head 3 to prevent the welding head 3 from falling off.

[0036] In a further preferred embodiment of the present invention, Figure 2 As shown, when the slider 8 is located at the top of the slide groove 9 , the switch body 534 is in contact with the extrusion portion 7 , and the bottom of the film cutting knife 4 is higher than the bottom of the welding head 3 .

[0037] In this embodiment, in order to prevent the cable tie from loosening and causing the boxes to scatter after the film cutting knife 4 cuts it, the cable tie needs to be melted before the film cutting knife 4 contacts it. Therefore, it is necessary to make the welding head 3 contact the cable tie first, and the film cutting knife 4 cuts the cable tie after the welding of the cable tie is completed. Therefore, when the slider 8 is located at the top of the slide groove 9, the bottom of the film cutting knife 4 is higher than the bottom of the welding head 3, which is used to ensure that the welding head 3 will melt the cable tie together first before the film cutting knife 4 cuts the cable tie.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A film cutting mechanism for a strapping machine, It is characterized in that The invention comprises a shell (1) installed at the strapping port of a strapping machine, wherein the top of the shell (1) is fixedly connected to the strapping machine via a linear drive, the bottom of the shell (1) is provided with a groove (2), a welding head (3) for welding a strap is slidably connected in the groove (2), a film cutting knife (4) is provided on one side of the welding head (3) in the groove (2), a gap is left between the film cutting knife (4) and the welding head (3), and a protective component (5) is provided between the film cutting knife (4) and the welding head (3).

2. A film cutting mechanism for a strapping machine according to claim 1, It is characterized in that The protective component (5) includes a connecting plate (51), a compression spring (52) and a contact switch (53); the top of the film cutting knife (4) is fixedly connected to the groove (2) via the connecting plate (51); the bottom of the connecting plate (51) is fixedly connected to the compression spring (52); the top of the welding head (3) is provided with a circular groove (6) for placing the compression spring (52); the bottom of the connecting plate (51) is connected to a contact switch (53) on the side away from the film cutting knife (4).

3. A film cutting mechanism for a strapping machine according to claim 2, It is characterized in that The contact switch (53) is composed of a connecting block (531), a positioning block (532), a pressing plate (533) and a switch body (534); the top of the connecting block (531) is fixedly connected to the connecting plate (51); one side of the bottom of the connecting block (531) is fixedly connected to the switch body (534); the top of the welding head (3) is located on both sides of the connecting block (531), and a positioning block (532) and a pressing plate (533) are respectively provided; the pressing plate (533) is located on one side of the connecting block (531) where the switch body (534) is provided; the positioning block (532) is provided on the other side of the connecting block (531) and is in contact with the connecting block (531).

4. A film cutting mechanism for a strapping machine according to claim 3, It is characterized in that A pressing portion (7) is formed by a protrusion on the top of the outer wall of one side of the pressing plate (533) close to the switch body (534), and a transition slope is provided between the bottom of the pressing portion (7) and the pressing plate (533).

5. A film cutting mechanism for a strapping machine according to claim 4, It is characterized in that A slider (8) is fixedly connected to one side of the film cutting knife (4) close to the welding head (3), and a slide groove (9) for connecting the slider (8) is provided from bottom to top at the bottom of the welding head (3), and the slide groove (9) does not pass through the welding head (3).

6. A film cutting mechanism for a strapping machine according to claim 5, It is characterized in that When the slider (8) is located at the top of the slide groove (9), the switch body (534) is in contact with the extrusion portion (7), and the bottom of the film cutting knife (4) is higher than the bottom of the welding head (3).

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