Precise fixed-length output cutting device for packing belt

Abstract

The utility model discloses a packing belt precise fixed-length output cutting device, which belongs to the technical field of packing belt cutting equipment, and comprises a rack provided with a digital motor, a feeding bin, a cutting device and a PLC (programmable logic controller), the feeding bin is positioned at the feeding end of the rack, the cutting device is positioned at the discharging end of the rack, and the PLC is positioned at the discharging end of the rack. The feeding bin is provided with a main roller, a lower roller, a tensioning wheel, a feeding port, a guide channel and a feeding channel, the wheel face of the lower roller and the wheel face of the tensioning wheel make contact with the wheel face of the main roller, the feeding port is located below the lower roller, the guide channel is located between the lower roller and the tensioning wheel, and the feeding channel extends to the cutting device from the tensioning wheel. The main roller is driven by a digital motor, and the digital motor and the cutting device are both connected with a PLC. The packing belt fixed-length cutting device solves the problem that an existing packing belt fixed-length cutting device is insufficient in packing belt cutting accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of strapping tape cutting equipment and relates to a device for accurately cutting strapping tapes into the same length. Background Art

[0002] Strapping tape is a material widely used in logistics, packaging, weaving and other fields, and its scope of use is wide. Nowadays, when transporting goods or manufacturing woven fabrics, people often use strapping tape to bundle the goods, or weave the strapping tape on a skeleton. When bundling the goods or weaving the skeleton, the user only needs to wrap the strapping tape around the sides of the goods or skeleton first, and then set the two free ends of the strapping tape on a baler. Then, the baler drives the two free ends of the strapping tape to move relative to each other to tighten the strapping tape, and then uses the baler to tighten the strapping buckle or heat the strapping tape to bond and fix the strapping tape, so as to achieve the purpose of bundling the goods or weaving. There is currently a strapping tape precision fixed-length output cutting device (authorization number: CN220448222U) which mainly includes a digital motor, an upper conveyor roller, a lower conveyor roller, a cutting device and a PLC controller. The strapping tape is sent to the cutting device by the upper conveyor roller and the lower conveyor roller for fixed-length cutting. However, when the upper and lower conveyor rollers were feeding the strapping tape, insufficient friction caused the tape to be intermittently fed to the cutting device, resulting in occasional inconsistencies in the length of the cut strapping tape. For example, when the strapping tape needed to be cut into uniform lengths of 1 meter, insufficient friction caused the upper and lower conveyor rollers to pause while feeding the strapping tape, resulting in the cut strapping tape occasionally being 0.95 meters long. Utility Model Content

[0003] The utility model provides a strapping tape precise fixed-length output cutting device, so as to solve the problem of insufficient strapping tape cutting precision in existing strapping tape fixed-length cutting devices.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: it includes a frame provided with a digital motor, a feed bin, a cutting device and a PLC controller, the feed bin is located at the feeding end of the frame, and the cutting device is located at the discharging end of the frame, the feed bin includes a main roller, a lower roller, a tensioning wheel, a feed port, a guide channel and a feeding channel, the wheel surfaces of the lower roller and the tensioning wheel are in contact with the wheel surface of the main roller, the feed port is located below the lower roller, the guide channel is located between the lower roller and the tensioning wheel, the feeding channel extends from the tensioning wheel to the cutting device, the strapping tape enters from the feed port and is first pressed and fed by the main roller and the lower roller, the strapping tape passes through the guide channel to ensure that it is transported between the main roller and the tensioning wheel for secondary pressing, and the strapping tape is then transported to the cutting device through the feeding channel for cutting; the main roller is driven by the digital motor, and the digital motor and the cutting device are both connected to the PLC controller.

[0005] In the above technical solution, a more specific technical solution can also be: the digital motor is connected to the reduction gear, the reduction gear prevents the digital motor from outputting too much power, the reduction gear is connected to the main roller through a drive shaft, the drive shaft is provided with a main wheel bearing, and the main wheel bearing is fixedly connected to the feed bin; the feed bin is also provided with a lower wheel shaft, an eccentric shaft, a first bearing, a second bearing and a support, and the lower wheel shaft, the second bearing and the support are fixedly connected to the feed bin; the lower roller is mounted on the lower wheel shaft through a lower bearing; one end of the eccentric shaft is installed in the second bearing and is provided with a connecting rod, and the tensioning pulley is mounted on the other end of the eccentric shaft through the first bearing, and a tensioning spring is provided between the connecting rod and the support. Under normal circumstances, the tensioning spring pulls the connecting rod downward, and the wheel surface of the tensioning pulley is tightly against the wheel surface of the main roller. When the connecting rod is pulled upward by hand to rotate the eccentric shaft, the wheel surface of the tensioning pulley will be separated from the wheel surface of the main roller.

[0006] Furthermore: the support is provided with a screw hole, a bolt is provided in the screw hole, the bolt and the connecting rod are both provided with through holes, one end of the tensioning spring is hooked in the through hole of the bolt, and the other end of the tensioning spring is hooked in the through hole of the connecting rod.

[0007] Furthermore: the cutting device includes a shearing motor, a cam, a roller, a movable cutter and a fixed cutter. The shearing motor is fixedly mounted on the frame and connected to the PLC controller. The cam is connected to the shearing motor. A reducer is provided between the shearing motor and the cam. The fixed cutter is provided with a feed port, and the strapping tape passes through the feed port. The movable cutter is provided next to the fixed cutter and below the feed port. The lower part of the movable cutter is connected to the roller, and the surface of the roller contacts the surface of the cam. The movable cutter is pushed upward by the rotation of the cam to cut the strapping tape passing through the feed port. A reset spring is provided between the upper part of the movable cutter and the frame. The reset spring is used to pull the movable cutter pushed upward back to its original position.

[0008] Furthermore: a discharge wheel pair is provided behind the movable cutter and the fixed cutter, a conveying path is provided between the discharge wheel pair and the movable cutter and the fixed cutter, the discharge wheel pair is driven by a conveying motor, the conveying motor is connected to the PLC controller, and the discharge wheel pair is used to transport the cut packaging tape to another place.

[0009] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art: the strapping belt is double-pressed and fed by the lower roller and the tensioning wheel, which effectively prevents the strapping belt from being interrupted during transportation, ensures the consistency of the cut strapping belt length, and increases the accuracy of strapping belt cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the present utility model.

[0011] Figure 2 yes Figure 1 AA view in .

[0012] Figure 3 It is a schematic diagram of the contact state between the tensioning wheel and the main roller.

[0013] Figure 4 This is a schematic diagram of the state where the tensioning wheel and the main roller are separated.

[0014] In the figure: 1. Frame; 2. Feed bin; 21. Main roller; 22. Lower roller; 221. Lower bearing; 222. Lower wheel shaft; 23. Tensioning pulley; 231. First bearing; 232. Eccentric shaft; 233. Second bearing; 234. Tensioning spring; 235. Support; 236. Connecting rod; 237. Bolt; 24. Feed inlet; 25. Guide channel; 26. Feed channel; 27. Transmission gear; 3. Shearing motor; 31. Cam; 32. Roller; 33. Moving cutter; 34. Fixed cutter; 35. Return spring; 36. Reducer; 4. Discharge wheel pair; 41. Discharge channel; 5. Digital motor; 51. Reduction device; 52. Drive shaft; 53. Main wheel bearing. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings:

[0016] like Figures 1 to 4The device for accurately cutting and outputting straps of fixed length shown in the figure comprises a frame 1 equipped with a digital motor 5, a feed bin 2, a cutting device and a PLC controller. The feed bin 2 is located at the feeding end of the frame 1, and the cutting device is located at the discharging end of the frame 1. The feed bin 2 comprises a main roller 21, a lower roller 22, a tensioning wheel 23, a feed port 24, a guide channel 25 and a feeding channel 26. The wheel surfaces of the lower roller 22 and the tensioning wheel 23 are in contact with the wheel surfaces of the main roller 21. The feed port 24 is located below the lower roller 22. The guide channel 25 is located below the lower roller 22. The guide channel 25 is located between the lower roller 22 and the tensioning wheel 23, and the feeding channel 26 extends from the tensioning wheel 23 to the cutting device. The strapping tape enters from the feed port 24 and is initially pressed by the main roller 21 and the lower roller 22. The strapping tape passes through the guide channel 25 to ensure that it is transported between the main roller 21 and the tensioning wheel 23 for secondary pressing. The strapping tape is then transported to the cutting device through the feeding channel 26 for cutting. The main roller 21 is driven by the digital motor 5, and the digital motor 5 and the cutting device are both connected to the PLC controller. The digital motor 5 is connected to the reduction gear 51, which prevents the digital motor 5 from outputting too much power. The reduction gear 51 is connected to the main roller 21 via a drive shaft 52. The drive shaft 52 is provided with a main wheel bearing 53. The main wheel bearing 53 is fixedly connected to the feed bin 2. The feed bin 2 is also provided with a lower wheel shaft 222, an eccentric shaft 232, a first bearing 231, a second bearing 233 and a support 235. The lower wheel shaft 222, the second bearing 233 and the support 235 are fixedly connected to the feed bin 2. The lower roller 22 is connected to the feed bin 2 via the lower bearing 22. 1 is mounted on the lower wheel shaft 222; one end of the eccentric shaft 232 is mounted in the second bearing 233 and is provided with a connecting rod 236. The tensioning pulley 23 is mounted on the other end of the eccentric shaft 232 via the first bearing 231. A tensioning spring 234 is provided between the connecting rod 236 and the support 235. Under normal conditions, the tensioning spring 234 pulls the connecting rod 236 downward, causing the surface of the tensioning pulley 23 to closely contact the surface of the main roller 21. When the connecting rod 236 is manually pulled upward to rotate the eccentric shaft 232, the surface of the tensioning pulley 23 is separated from the surface of the main roller 21. The support 235 has a screw hole, in which a bolt 237 is installed. Both the bolt 237 and the connecting rod 236 have through holes. One end of the tensioning spring 234 is hooked into the through hole of the bolt 237, and the other end of the tensioning spring 234 is hooked into the through hole of the connecting rod 236.The cutting device includes a shearing motor 3, a cam 31, a roller 32, a movable cutter 33 and a fixed cutter 34. The shearing motor 3 is fixedly mounted on the frame 1 and connected to the PLC controller. The cam 31 is connected to the shearing motor 3. A reducer 36 is provided between the shearing motor 3 and the cam 31. The fixed cutter 34 is provided with a feed port, and the strapping tape passes through the feed port. The movable cutter 33 is provided next to the fixed cutter 34 and is located below the feed port. The lower part of the movable cutter 33 is connected to the roller 32. The surface of the roller 32 contacts the surface of the cam 31. The movable cutter 33 is pushed upward by the rotation of the cam 31 to cut the strapping tape passing through the feed port. A reset spring 35 is provided between the upper part of the movable cutter 33 and the frame 1. The reset spring 35 is used to pull the movable cutter 33 pushed upward back to its original position. A discharge wheel pair 4 is provided behind the movable cutter 33 and the fixed cutter 34, and a conveying path is provided between the discharge wheel pair 4 and the movable cutter 33 and the fixed cutter 34. The discharge wheel pair 4 is driven by a conveying motor, and the conveying motor is connected to the PLC controller. The discharge wheel pair 4 is used to transport the cut packaging tape to another place.

[0017] When in use, start the PLC controller to control the digital motor 5 to start driving the main roller 21, and the lower roller 22 and the tensioning wheel 23 in contact with the main roller 21 also rotate accordingly. The strapping tape extends from the feed port 24 and is squeezed and fed for the first time by the main roller 21 and the lower roller 22. The strapping tape passes through the guide channel 2525 to ensure that it is transported between the main roller 21 and the tensioning wheel 23 for secondary squeezing. The strapping tape is then transported to the feed port of the fixed cutter 34 through the feeding channel 26. After the digital motor 5 rotates the set number of circles, the PLC controller controls the shearing motor 3 to start working. The shearing motor 3 drives the cam 31 to rotate, and the roller 32 passes through the protrusion of the cam 31 to make the movable cutter 33 move upward, and the strapping tape is cut by the cooperation of the movable cutter 33 and the fixed cutter 34. The cut strapping tape passes through the discharging channel 41 and is transported away by the discharging wheel pair 4.

[0018] It should be noted that the PLC controller provided by this utility model is a common device in the prior art. The technical solution of this utility model can be achieved by simply connecting it through the connection relationship provided in the embodiments of this utility model and setting up the PLC controller in a conventional manner. This does not involve any improvements in control methods or software. As for the parameter setting and usage of the PLC controller, those skilled in the art can purchase the PLC controller and refer to the accompanying instruction manual to implement the corresponding control settings. Detailed explanation is not provided here.

Claims

1. A precise fixed-length output cutting device for strapping, comprising a frame provided with a digital motor, a feed bin, a cutting device and a PLC controller, wherein the feed bin is located at the feeding end of the frame, and the cutting device is located at the discharging end of the frame, characterized in that: The feed bin is provided with a main roller, a lower roller, a tensioning wheel, a feed port, a guide channel and a feeding channel; the wheel surfaces of the lower roller and the tensioning wheel are in contact with the wheel surface of the main roller; the feed port is located below the lower roller; the guide channel is located between the lower roller and the tensioning wheel; the feeding channel extends from the tensioning wheel to the cutting device; the main roller is driven by the digital motor; and the digital motor and the cutting device are both connected to the PLC controller.

2. The strapping tape precise fixed-length output cutting device according to claim 1 is characterized by: The digital motor is connected to the reduction device, and the reduction device is connected to the main roller through a driving shaft. The driving shaft is provided with a main wheel bearing, and the main wheel bearing is fixedly connected to the feed bin; the feed bin is also provided with a lower wheel shaft, an eccentric shaft, a first bearing, a second bearing and a support, and the lower wheel shaft, the second bearing and the support are fixedly connected to the feed bin, and the lower roller is installed on the lower wheel shaft through a lower bearing, one end of the eccentric shaft is inserted into the second bearing and is provided with a connecting rod, and the tensioning wheel is installed on the other end of the eccentric shaft through a first bearing, and a tensioning spring is provided between the connecting rod and the support.

3. The precise fixed-length output cutting device for strapping according to claim 2 is characterized in that: The support is provided with a screw hole, a bolt is provided in the screw hole, the bolt and the connecting rod are both provided with through holes, one end of the tensioning spring is hooked in the through hole of the bolt, and the other end of the tensioning spring is hooked in the through hole of the connecting rod.

4. The strapping tape precise fixed-length output cutting device according to claim 1 or 3, characterized in that: The cutting device includes a shearing motor, a cam, a roller, a movable cutter and a fixed cutter. The shearing motor is fixedly mounted on the frame and connected to the PLC controller. The cam is connected to the shearing motor. A reducer is provided between the shearing motor and the cam. The fixed cutter is provided with a feed inlet. The movable cutter is provided next to the fixed cutter and below the feed inlet. The lower part of the movable cutter is connected to the roller. The surface of the roller contacts the surface of the cam. A reset spring is provided between the upper part of the movable cutter and the frame.

5. The strapping tape precise fixed-length output cutting device according to claim 4, characterized in that: A discharge wheel pair is arranged behind the movable cutter and the fixed cutter, a conveying path is arranged between the discharge wheel pair and the movable cutter and the fixed cutter, the discharge wheel pair is driven by a conveying motor, and the conveying motor is connected to the PLC controller.

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