Packaging machine head and packaging apparatus with automatic adjustment of the belt gap

Abstract

The utility model provides a kind of packing head and packing equipment with automatic adjustment belt gap. Packing head includes welding mechanism, belt feeding mechanism;The belt feeding mechanism includes belt feeding shell, belt feeding wheel, belt feeding driving part and compression assembly, belt feeding groove is provided in belt feeding shell, first gap, second gap are provided on belt feeding groove;Belt feeding wheel is located at first gap;Belt feeding driving part is configured to drive belt feeding wheel rotation;Compression assembly includes compression wheel, first swing arm, spring, compression driving part and first signaler, the first signaler is triggered after entering into the belt feeding groove in the thickness change site of packing belt, and the first swing arm swings to make the compression wheel away from the belt feeding wheel by the compression driving part, and compression driving part drives first swing arm swing to make compression wheel away from belt feeding wheel after the first signaler is triggered by packing belt conveyed in belt feeding groove. It is realized to reduce the jam in the process of belt feeding module conveying packing belt to improve use reliability.

Description

Technical Field

[0001] This utility model relates to the field of baling machine technology, and in particular to a baling machine head and baling equipment that can automatically adjust the belt feeding gap. Background Technology

[0002] Packaging equipment typically uses strapping to bundle and package goods, and is widely used in industrial production. Chinese Patent Publication No. CN116692105A discloses a strapping machine head and a strapping machine itself. The strapping machine head, through a strapping feed module, drives the conveying and tightening of the strapping. In practical use, when the strapping on a reel runs out, the head of the new reel's strapping needs to be welded to the tail of the used strapping to meet continuous production requirements. This eliminates the need for manual re-threading of the strapping head when replacing the reel. However, welding the head and tail of the strapping increases the thickness of the welded area, making it prone to jamming during conveying through the machine head, thus reducing reliability. Therefore, how to design a technology to reduce strapping jamming and improve reliability is the technical problem this invention aims to solve. Utility Model Content

[0003] This utility model provides a packing head and packing equipment with automatically adjustable belt feeding gap, which reduces jamming during the belt feeding module's conveying of packing belt and improves reliability.

[0004] This utility model provides a packing head with automatically adjustable belt feed gap, comprising: A welding mechanism configured to weld packing straps together; A belt feeding mechanism, configured to convey packing belts; The tape feeding mechanism includes: A belt feeding housing configured to convey packing belts; A belt feeder, which is rotatably mounted on the belt feeder housing; A belt feeder drive is configured to drive the belt feeder to rotate so as to convey the strapping tape in the belt feeder housing. A pressing component is disposed on the tape feeder housing and arranged opposite to the tape feeder wheel, and a tape feeding gap is formed between the pressing component and the tape feeder wheel; the pressing component is configured to press the strapping tape against the tape feeder wheel to generate a force that drives the strapping tape forward and backward; a drive conveying zone for driving the strapping tape to be conveyed is formed between the pressing component and the tape feeder wheel; A belt feed gap drive, the belt feed gap drive being configured to drive the clamping member and the belt feed wheel to move closer or further apart from each other to adjust the belt feed gap; A first signal device is configured to trigger the tape feeding gap drive when it enters the drive conveying zone at a point where the thickness of the packing tape changes. A controller configured to control the operation of the belt feed gap drive upon receiving a signal from the first signaler.

[0005] In one embodiment, the first signal is installed at the front end of the drive conveying zone. The first signal is configured to trigger the belt feeding gap drive when the belt enters the drive conveying zone at a thickness change point during the forward conveying of the packing strap by the belt feeder.

[0006] In one embodiment, a second signal device is also included. The second signal device is installed at the rear end of the drive conveying zone. The second signal device is configured to trigger the belt feeding gap drive when the belt enters the drive conveying zone at a thickness change point during the reverse conveying of the packing belt by the belt feeder.

[0007] In one embodiment, the first signal device is a thickness detector, a pressure detector, or a micro switch; Alternatively, the first signal device may be a signal input device.

[0008] In one embodiment, the second signal device is a thickness detector, a pressure detector, or a micro switch.

[0009] In one embodiment, the clamping component is a clamping wheel or a clamping block.

[0010] In one embodiment, it further includes a first swing arm and a spring; The first end of the first swing arm is rotatably mounted on the belt feeder housing, the clamping member is mounted on the first swing arm, and the spring is mounted on the second end of the first swing arm. The spring is configured to apply a spring force to the first swing arm toward the belt feeder housing. The belt feeding gap drive is disposed between the belt feeding machine housing and the first swing arm, and the belt feeding gap drive is a cylinder or an electric push rod.

[0011] One embodiment of this application also provides a packaging device, a packaging chute, and the aforementioned packaging head, wherein the packaging chute is connected to the packaging head.

[0012] The first signaler is configured to send a signal to the controller before the thickness variation section of the strapping enters the drive conveyor zone. The controller controls the operation of the feeding gap drive component based on the signal sent by the first signaler. The feeding gap drive component drives the pressing component and the feeding wheel to move relative to each other, thereby adjusting the thickness of the feeding gap. This ensures that after the thickness variation section of the strapping is conveyed to the drive conveyor zone, the feeding wheel and the pressing component work together to ensure smooth conveying of the strapping. This reduces the likelihood of jamming at the welded parts of the strapping in the drive conveyor zone, thereby reducing jamming during the conveying of the strapping by the feeding module and improving reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the packing head with automatically adjustable belt feed gap of this utility model; Figure 2 This is a partial structural schematic diagram of an embodiment of the packing head with automatically adjustable belt feed gap of this utility model; Figure 3 This is one of the structural schematic diagrams of an embodiment of the packing head of this utility model; Figure 4 This is a second structural schematic diagram of an embodiment of the packing head of this utility model; Figure 5 This is the third structural schematic diagram of an embodiment of the packing head of this utility model; Figure 6 This is the fourth structural schematic diagram of an embodiment of the packing head of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Belt feeding module; 11. Belt feeding housing; 12. Belt feeding roller; 13. Belt feeding roller drive component; 14. Pressing assembly; 10. Drive conveyor area; 111. Feeding slot; 112. First notch; 113. Second notch; 114. Third notch; 115. Fourth notch; 116. Mounting substrate; 117. First outer guide bar; 118. Second outer guide bar; 119. First inner guide bar; 120. Second inner guide bar; 141. Pressure roller; 142. First swing arm; 143. Spring; 144. Belt feed gap drive; 145. First signal device; 146. Second signal device; 1441. Second cylinder; 1442. Second swing arm; 1443. Protruding structure; 2. Install the base; 3. Welding mechanism. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings.

[0016] like Figures 1 to 3As shown, one embodiment of this application provides a packing head with automatically adjustable belt feed gap, including: a welding mechanism 3; The tape feeding mechanism 1 also includes: A belt feeding housing 11, which is configured to convey packing belts; A belt feeder 12 is rotatably mounted on the belt feeder housing; A belt feeder drive 13 is configured to drive the belt feeder 12 to rotate so as to convey the packing strap in the belt feeder housing 11 via the belt feeder 12. A pressing component is disposed on the tape feeder housing 11 and arranged opposite to the tape feeder 12, with a tape feeding gap formed between the pressing component and the tape feeder 12; the pressing component is configured to press the strapping against the tape feeder 12 to generate a force that drives the strapping forward and backward; a drive conveying zone for driving the strapping conveyor is formed between the pressing component and the tape feeder. A belt feed gap drive 144 is configured to drive the clamping member and the belt feed wheel 12 to move closer or further apart to adjust the belt feed gap. The first signal device 145 is configured to trigger the tape feeding gap drive 144 to operate when it enters the drive conveying area at a thickness change point of the packing tape. A controller (not shown) is configured to control the operation of the belt feed gap drive 144 upon receiving a signal from the first signaler 145.

[0017] Specifically, the feed roller 12 is used to convey the strapping during the bundling process and tighten the strapping after it has wrapped around the goods once. The feeding or tightening of the strapping is achieved by the forward and reverse rotation of the feed roller 12. The specific operation process can be referred to the feeding and tightening process of a conventional strapping machine head, and is not limited here.

[0018] When the original strapping tape is almost used up, the end of the original strapping tape is aligned with the beginning of the new strapping tape to form an overlap. Then, the overlap is welded together to connect the end of the original strapping tape with the beginning of the new strapping tape. During the continuous conveying of the strapping tape by the feed roller 12, the welded part of the strapping tape enters the feed housing 11. Because the welded part of the strapping tape is relatively thick, after the first signal device 145 detects that the thickened part of the strapping tape has entered the feed housing 11, the feed gap drive 144 is activated to drive the pressing component away from the feed roller 12, thereby increasing the feed gap and increasing the interval of the drive conveying zone 10. This ensures that the welded part of the strapping tape can also pass smoothly between the pressing component and the feed roller 12, reducing the chance of the welded part of the strapping tape getting stuck in the feed gap.

[0019] The clamping component is a clamping wheel 141 or a clamping block.

[0020] Additionally, the first signal device is installed at the front end of the drive conveyor zone. The first signal device is configured to trigger the feed gap drive when the packing strap enters the drive conveyor zone at a point where the thickness of the packing strap changes during the forward conveying of the packing strap by the feed roller. The first signal device can be a thickness detector, a pressure detector, or a microswitch; alternatively, the first signal device can be a signal input device.

[0021] For example: the tape feeder housing 11 is provided with a tape feed groove 111, and the tape feed groove 111 is provided with a first notch 112 and a second notch 113, which are arranged opposite to each other; the tape feeder wheel 12 is rotatably mounted on the tape feeder housing 11, and the tape feeder wheel 12 is located at the first notch 112; the tape feeder wheel drive member 13 is configured to drive the tape feeder wheel 12 to rotate; the clamping assembly 14 includes a clamping wheel 141 (i.e., a clamping component). The device includes a first swing arm 142, a spring 143, a belt feed gap drive 144, and a first signal device 145. The first end of the first swing arm 142 is rotatably mounted on the belt feeder housing 11. The pressure wheel 141 is rotatably mounted on the first swing arm 142 and located at the second notch 113. The spring 143 is mounted on the second end of the first swing arm 142 and is configured to apply a spring force to the first swing arm 142 in the direction of the belt feeder housing 11. The first signal device 145 is configured to trigger the feeding gap drive 144 to drive the first swing arm 142 to swing so that the pressure wheel 141 moves away from the feeding wheel 12 after the packing strap enters the feeding groove 111 at the thickness change part of the packing strap. The feeding gap drive 144 is configured to drive the first swing arm 142 to swing so that the pressure wheel 141 moves away from the feeding wheel 12 after the packing strap conveyed in the feeding groove 111 triggers the first signal device 145. The clamping roller 141 and the feeding roller 12 form a drive conveying zone 10 for driving the conveying of the packing strap.

[0022] When the original strapping tape is almost used up, the end of the original strapping tape is aligned with the beginning of the new strapping tape to form an overlap. Then, the overlap is welded together to connect the end of the original strapping tape with the beginning of the new strapping tape. During the continuous conveying of the strapping tape by the feeding mechanism 1, the welded part of the strapping tape enters the feeding groove 111 from the inlet. Since the welded part of the strapping tape is relatively thick, after the first signal device 145 detects that the thickened part of the strapping tape has entered the feeding groove 111, the feeding gap drive 144 is activated to drive the first swing arm 142 to rotate. After the first swing arm 142 rotates, it will drive the pressure roller 141 away from the feeding roller 12, thereby increasing the distance between the pressure roller 141 and the feeding roller 12, so as to increase the interval of the drive conveying zone 10 and ensure that the welded part of the strapping tape can also pass smoothly between the pressure roller 141 and the feeding roller 12, so as to reduce the welded part of the strapping tape getting stuck between the pressure roller 141 and the feeding roller 12.

[0023] After the strapping band passes between the pressure roller 141 and the feed roller 12 at the welding point, the feed gap drive 144 resets to ensure that the pressure roller 141 and the feed roller 12 can clamp the single layer of strapping band for normal feeding. In actual use, after driving the first swing arm 142 to swing against the spring 143, the feed gap drive 144 resets within a set time, causing the first swing arm 142 to reset under the action of the spring 143. The set time is determined by the strapping band conveying speed and the distance between the first notch 112 and the third notch 114; the specific set time is not limited here.

[0024] In addition, the signal detected by the first signaler 145 can be sent to the controller of the packaging equipment (such as a conventional industrial control device like a PLC), and the controller can control the operation of the tape feed gap drive 144.

[0025] like Figure 1 As shown, along the feeding direction of the feeding groove 111, the third notch 114 is located between the second notch 113 and the entrance of the feeding groove 111; a first signal device 145 is disposed on the feeding housing 11 and located at the third notch 114, and the first signal device 145 is configured to detect the thickness of the packing tape being conveyed in the feeding groove 111.

[0026] Specifically, the first signal device 145 can be a micro switch, and the transmission element of the micro switch (such as a roller) extends into the tape feed groove 111 through the corresponding third notch 114. The welding part of the packing tape moves to the third notch 114 and presses the transmission element of the micro switch to detect the welding part of the packing tape, thereby triggering the tape feed gap drive 144 to operate.

[0027] In one embodiment, such as Figure 4As shown, a first signal device 145 is disposed outside the tape feeder housing 11, and the first signal device is configured to detect the thickness of the packing tape before the packing tape is fed into the tape feeder trough.

[0028] Specifically, the distance between the first signal device 145 and the tape feeder housing 11 remains constant. After detecting a change in the thickness of the strapping tape, the first signal device 145 sends a signal to the PLC. Since the speed at which the tape feed roller 13 conveys the strapping tape is constant, as the tape feed roller 13 rotates forward and conveys the strapping tape through the tape feed trough 111, the area of ​​thickness change in the strapping tape will reach the tape feed roller 111 within a specified time. Based on the signal sent by the first signal device 145, the PLC controls the tape feed gap drive 144 to operate within the specified time. The first signal device 145 can be a microswitch.

[0029] In another embodiment, such as Figure 5 As shown, the first signal device 145 is configured to indirectly detect the conveying length of the portion of the packing tape where the thickness changes.

[0030] Specifically, the first signal device 145 can be a strapping welding machine that automatically welds the head and tail of the strapping in conventional technology. The distance between the strapping welding machine and the feeding machine housing 11 remains constant. After the strapping welding machine completes the welding operation on the head and tail of the strapping, the PLC starts the feeding wheel drive 13 to drive the feeding wheel 12 to rotate. After the feeding wheel 12 rotates, the length of the strapping welded part conveyed within a specified time is constant. Therefore, the PLC can indirectly control the action of the feeding gap drive 144 by measuring the conveying length of the strapping welded part. The strapping welding machine then serves as a signal input device.

[0031] In one embodiment, such as Figure 1 As shown, the first signal device 144 is configured to trigger the feeding gap drive to drive the first swing arm to swing so that the pressing wheel moves away from the feeding wheel when the thickness of the packing strap changes during the forward feeding process of the feeding wheel. The packing head with automatic adjustable belt feed gap also includes a second signal device 145, which is installed at the rear end of the drive conveyor zone. The second signal device is configured to trigger the belt feed gap drive when the belt enters the drive conveyor zone at a thickness change point during the reverse conveying of the packing belt by the belt feed wheel.

[0032] Specifically, during the conveying process of the strapping mechanism 1, when the strapping is being tightened, there is a possibility that the welded part of the strapping may be pulled back into the conveying groove 111 from the outlet. Therefore, a second signal device 146 is further provided. During the tightening process of the strapping mechanism 1, if the second signal device 146 detects a thickness change in the strapping entering the conveying groove, it triggers the PLC to control the conveying gap drive 144 to rotate the first swing arm 142. The rotation of the first swing arm 142 will move the pressure roller 141 away from the conveying roller 12, thereby increasing the distance between the pressure roller 141 and the conveying roller 12. This increases the interval of the drive conveying zone 10, ensuring that the welded part of the strapping can also pass smoothly between the pressure roller 141 and the conveying roller 12, reducing the likelihood of the welded part of the strapping getting stuck between them.

[0033] Furthermore, the second signal device is a thickness detector, a pressure detector, or a micro switch. Taking the second signal device 146 as an example, it is a micro switch. Figure 1 As shown, a fourth notch 115 is provided on the tape feeding groove 111, and the fourth notch 115 is located between the second notch 113 and the outlet of the tape feeding groove 111; The clamping assembly 14 includes a second signal 146 disposed on the tape feeder housing 11 and located at the fourth notch 115. The second signal 146 is configured to detect the thickness of the packing tape being conveyed in the tape feeder trough 111. The tape feeder gap drive 144 is further configured to drive the first swing arm 142 to swing after the packing tape being conveyed in the tape feeder trough 111 triggers the second signal 146, so that the clamping wheel 141 moves away from the tape feeder 12.

[0034] Specifically, the first signal device 145 is configured to detect the thickness of the packing tape being conveyed in the feed groove 111 when the feed roller drive 13 drives the feed roller 12 to rotate in the forward direction; The second signal device 146 is configured to detect the thickness of the packing tape being conveyed in the feed groove 111 when the feed roller drive 13 drives the feed roller 12 to rotate in the opposite direction.

[0035] The first signal device 145 is used to detect the thickness of the packing strap during the feeding mechanism 1's conveying of the packing strap from the inlet to the outlet of the feeding groove 111. Specifically, when the feeding roller 12 rotates forward, the first signal device 145 detects the thickness of the packing strap. The second signal device 146 is used to detect the thickness of the packing strap during the feeding mechanism 1's tightening of the packing strap from the outlet to the inlet of the feeding groove 111. Specifically, when the feeding roller 12 rotates backward, the second signal device 146 detects the thickness of the packing strap.

[0036] In one embodiment, the conveyor belt trough 111 includes a first conveyor belt segment and a second conveyor belt segment, the first conveyor belt segment and the second conveyor belt segment are arranged at intervals, a first gap 112 and a second gap 113 are formed between the first conveyor belt segment and the second conveyor belt segment, the first conveyor belt segment is provided with the third gap 114, and the second conveyor belt segment is provided with the fourth gap 115.

[0037] Specifically, in order to meet the requirements of installing the feed roller 12 and the clamping roller 141, the feed trough 111 adopts a segmented structure. During the feeding process, the packing strap will pass through the first conveying trough segment and the second conveying trough segment in sequence.

[0038] In one embodiment, the tape feeder housing 11 includes a mounting base plate 116, a first outer guide bar 117, a second outer guide bar 118, a first inner guide bar 119, and a second inner guide bar 120. The first outer guide bar 117, the second outer guide bar 118, the first inner guide bar 119, and the second inner guide bar 120 are disposed on the mounting base plate 116. The first outer guide bar 117 and the first inner guide bar 119 are arranged to form the first conveying groove segment, and the second outer guide bar 118 and the second inner guide bar 120 are arranged to form the second conveying groove segment. The first gap 112 is formed between the first inner guide strip 119 and the second inner guide strip 120, and the second gap 113 is formed between the first outer guide strip 117 and the second outer guide strip 118.

[0039] Specifically, in order to facilitate the formation of segmented conveyor belt grooves 111, a first outer guide strip 117, a second outer guide strip 118, a first inner guide strip 119, and a second inner guide strip 120 are provided on the mounting base plate 116 to form a first conveyor belt segment and a second conveyor belt segment.

[0040] The tape feeder housing 11 also includes a front panel (not shown), a first outer guide bar 117, a second outer guide bar 118, a first inner guide bar 119, a second inner guide bar 120, and a tape feed roller 12 located between the front panel and the mounting base plate 116. The specific installation method is based on existing technology and is not limited here.

[0041] Furthermore, in order to facilitate the installation of the first signal device 145 and the second signal device 146, the first outer guide strip 117 is provided with a first mounting groove (unmarked) and the third notch 114, the first mounting groove and the third notch 114 are connected, and the first signal device 145 is disposed in the first mounting groove. The second outer guide strip 118 is provided with a second mounting groove (unmarked) and the fourth notch 115. The second mounting groove and the fourth notch 115 are connected. The second signal device 146 is disposed in the second mounting groove.

[0042] Specifically, the first signal device 145 is disposed in the first mounting groove, and the second signal device 146 is disposed in the second mounting groove, so as to facilitate the installation of the first signal device 145 and the second signal device 146.

[0043] Furthermore, the clamping roller 141 is located between the first inner guide strip 119 and the second inner guide strip 120, and the feed roller 12 is located between the first outer guide strip 117 and the second outer guide strip 118.

[0044] In one embodiment, the belt feed gap drive 144 includes a first cylinder, which is hinged between the second end of the first swing arm 142 and the belt feed housing 11. Specifically, after the piston rod of the first cylinder extends, it abuts against the second end of the first swing arm 142, causing the first swing arm 142 to swing. After the piston rod of the first cylinder retracts, the first swing arm 142 returns to its original position under the action of the spring 143.

[0045] Alternatively, the belt feeding gap drive 144 includes a second cylinder 1441 and a second swing arm 1442. The first end of the second swing arm 1442 is hinged to the belt feeding housing 11, and the second cylinder 1441 is hinged between the second end of the second swing arm 1442 and the belt feeding housing 11. The first end of the second swing arm 1442 is provided with a protrusion structure 1443, which abuts against the second end of the first swing arm 142. Specifically, the second cylinder 1441 drives the second swing arm 1442 to swing, so that the protrusion structure 1443 on the second swing arm 1442 abuts against the second end of the first swing arm 142, thereby driving the first swing arm 142 to swing. Similarly, after the second cylinder 1441 resets, the first swing arm 142 resets under the action of the spring 143.

[0046] like Figure 6 As shown, the second signal device 146 is disposed outside the tape feeder housing; the second signal device is configured to detect the thickness of the packing tape before the packing tape is fed into the tape feed trough.

[0047] Specifically, the second signal device 146 is installed outside the conveyor housing 11 and its detection method is similar to... Figure 4 The detection method of the first signal device 145 is the same, and will not be described in detail here.

[0048] In one embodiment, the packing head further includes a mounting base 2, and the tape feeding mechanism 1 is disposed on the mounting base 2.

[0049] Specifically, the welding mechanism 3 and the strapping mechanism 1 are mounted on the mounting base 2, which serves as the main mounting body for later assembly onto the frame of the packing equipment. The specific process of the strapping mechanism 1 cooperating with the welding mechanism 3 to feed, tighten, weld, and cut the packing strap can be found in the machine head operation process of a conventional packing machine, and will not be elaborated here.

[0050] One embodiment of this application also provides a packaging device, a packaging chute, and the aforementioned packaging head. The packaging chute is connected to the welding mechanism 3 and the feeding mechanism 1 of the packaging head. By setting a third notch on the feeding chute, a first signal device in the pressing assembly can detect the thickness of the packaging tape being conveyed in the feeding chute through the third notch. When the welded part formed after welding the head and tail of the packaging tape is conveyed to the position of the third notch, since the welded part of the packaging tape is the thickness of a double layer of packaging tape, the welded part of the packaging tape will trigger the first signal device. After the first signal device detects that the thickness of the packaging tape at the third notch exceeds one layer thickness, the feeding gap drive will be activated. The feeding gap drive will drive the first swing arm to swing so that the pressing wheel moves away from the feeding wheel. In this way, the distance between the pressing wheel and the feeding wheel in the driving conveying area is increased, so as to reduce the jamming of the welded part of the packaging tape in the driving conveying area, thereby reducing the jamming during the conveying of the packaging tape by the feeding module and improving the reliability of use.

Claims

1. A packing head with automatically adjustable belt feed gap, characterized in that, include: A welding mechanism configured to weld packing straps together; A belt feeding mechanism, configured to convey packing belts; The tape feeding mechanism includes: A belt feeding housing configured to convey packing belts; A belt feeder, which is rotatably mounted on the belt feeder housing; A belt feeder drive is configured to drive the belt feeder to rotate so as to convey the strapping tape in the belt feeder housing. A pressing component is disposed on the tape feeder housing and arranged opposite to the tape feeder wheel, and a tape feeding gap is formed between the pressing component and the tape feeder wheel; the pressing component is configured to press the strapping tape against the tape feeder wheel to generate a force that drives the strapping tape forward and backward; a drive conveying zone for driving the strapping tape to be conveyed is formed between the pressing component and the tape feeder wheel; A belt feed gap drive, the belt feed gap drive being configured to drive the clamping member and the belt feed wheel to move closer or further apart from each other to adjust the belt feed gap; A first signal device is configured to trigger the tape feeding gap drive when it enters the drive conveying zone at a point where the thickness of the packing tape changes. A controller configured to control the operation of the belt feed gap drive upon receiving a signal from the first signaler.

2. The packing head with automatically adjustable belt feed gap according to claim 1, characterized in that, The first signal device is installed at the front end of the drive conveyor zone. The first signal device is configured to trigger the belt feeding gap drive when the belt enters the drive conveyor zone at a thickness change point during the forward conveying of the packing belt by the belt feeding wheel.

3. The packing head with automatically adjustable belt feed gap according to claim 1, characterized in that, It also includes a second signal device, which is installed at the rear end of the drive conveyor zone. The second signal device is configured to trigger the belt feeding gap drive when the belt enters the drive conveyor zone at a thickness change point during the reverse conveying of the packing belt by the belt feeding wheel.

4. The packing head with automatically adjustable belt feed gap according to claim 1, characterized in that, The first signal device is a thickness detector, a pressure detector, or a micro switch; Alternatively, the first signal device may be a signal input device.

5. The packing head with automatically adjustable belt feed gap according to claim 3, characterized in that, The second signal device is a thickness detector, a pressure detector, or a micro switch.

6. The packing head with automatically adjustable belt feed gap according to claim 1, characterized in that, The clamping component is a clamping wheel or a clamping block.

7. The packing head with automatically adjustable belt feed gap according to claim 6, characterized in that, It also includes the first swing arm and the spring; The first end of the first swing arm is rotatably mounted on the belt feeder housing, the clamping member is mounted on the first swing arm, and the spring is mounted on the second end of the first swing arm. The spring is configured to apply a spring force to the first swing arm toward the belt feeder housing. The belt feeding gap drive is disposed between the belt feeding machine housing and the first swing arm, and the belt feeding gap drive is a cylinder or an electric push rod.

8. A packaging device, comprising a packaging chute, characterized in that, It also includes the packing head as described in claims 1-7, wherein the packaging chute is connected to the packing head.

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