Wrapping production line

Abstract

The utility model discloses a wrapping production line which comprises a machine frame and further comprises a conveying device, a packaging paper taking and placing device, a packaged object taking and placing device, a left-right folding device, an end corner folding device, a gluing device, an end corner upturning device and an end corner turning and pressing device which are arranged on the machine frame. The left-right turning device, the end corner folding device, the end corner upturning device and the end corner turning and pressing device are sequentially arranged along the conveying device, and the gluing device is arranged between the end corner folding device and the end corner upturning device or between the end corner upturning device and the end corner turning and pressing device. The packaging machine can automatically complete packaging steps of packaging paper taking and placing, packaged object taking and placing, packaging paper folding and the like, can replace manual work to complete wrapping operation on rectangular objects, and is high in wrapping efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing equipment technical field, especially relate to a wrap production line. BACKGROUND

[0002] The wrap is the packing method that paper, plastic film, aluminum foil, composite film etc. Figure 1 Flexible material is used to cover goods.

[0003] 1) goods are placed on a rectangular wrapping paper, and then the wrapping paper is folded from the two sides of the rectangular goods width direction to cover the goods;

[0004] 2) the wrapping paper of the end of the rectangular goods length direction is folded inward to form an end sharp angle;

[0005] 3) the adhesive is punched on the end sharp angle;

[0006] 4) the sharp angle is folded upward and pasted on the top.

[0007] In the prior art, the wrapping process of the above-mentioned rectangular goods is completed by manual, and the production efficiency is low. UTILITY MODEL CONTENT

[0008] Therefore, the utility model provides a wrap production line to solve the technical problem of replacing manual wrapping of rectangular goods and improving production efficiency.

[0009] The wrap production line of the utility model comprises a rack, and further comprises a conveying device, a wrapping paper taking and placing device, a wrapped goods taking and placing device, left and right folding devices, an end angle folding device, a glue punching device, an end angle upward folding device and an end angle folding pressing device arranged on the rack.

[0010] The conveying device comprises a belt conveyor, a positioning member arranged on the conveying belt of the belt conveyor for positioning the wrapped goods, an upper side limiter arranged above the belt conveyor for preventing the wrapping paper from being loose and unfolded, and a lateral limiter arranged on both sides of the belt conveyor for preventing the wrapping paper from being loose and unfolded.

[0011] The wrapping paper taking and placing device comprises a paper feeder arranged at the head end of the conveying device for feeding out the wrapping paper, a mechanical clamp for taking and placing the wrapping paper, and a first linear driver for driving the mechanical clamp to transfer the wrapping paper fed out by the paper feeder to the left and right folding stations.

[0012] The wrapped article taking and placing device comprises a magazine for stacking the wrapped articles in a vertical overlapping manner, a receiving groove located below the magazine, a separator arranged on the receiving groove for separating the lowermost wrapped article in the magazine, a second linear actuator for driving the receiving groove to move back and forth, and a blocker for blocking the wrapped article during the backward movement of the receiving groove to force the wrapped article to fall onto the wrapping paper.

[0013] The left and right folding device comprises a left paper pushing plate and a right paper pushing plate located on both sides of the left and right folding station, a third linear actuator for driving the left paper pushing plate to move horizontally, and a fourth linear actuator for driving the right paper pushing plate to move horizontally.

[0014] The end angle folding device comprises a depressor for depressing the wrapping paper on the front side and the rear side of the wrapped article, and a pusher for pushing the wrapping paper on the front side and the rear side of the wrapped article from both sides.

[0015] The glue applying device comprises a container for storing the adhesive, and a transfer coater for transferring the adhesive in the container to the wrapping paper.

[0016] The end angle turning device comprises a vertical plate located beside the belt conveyor, and a fifth linear actuator for driving the vertical plate to move up and down.

[0017] The end angle turning device comprises a turning plate hinged beside the belt conveyor, and a turning actuator for driving the turning plate to turn.

[0018] Further, the positioning member is a limiting strip or a limiting pin for limiting the positions of the left and right sides of the wrapped article; the upper side limiter is a pressing strip or a pressing plate arranged along the conveying direction of the belt conveyor; the lateral limiter comprises a turning limiter located beside the end angle folding device, and a fixed limiter located between the turning limiter and the end angle turning device, wherein the fixed limiter is a limiting strip, a limiting plate, or a combination of a limiting strip and a limiting plate.

[0019] Further, the mechanical gripper is a pneumatic finger, the first linear actuator is a rodless cylinder, and the pneumatic finger is connected to the outer sliding block of the rodless cylinder through an adapter.

[0020] Further, the separator is a horizontally arranged insertion rod or insertion plate; the blocker comprises a vertically arranged cylinder and a vertical blocking rod connected to the piston rod end of the cylinder.

[0021] Further, the wrapped article taking and placing device further comprises a front holder for temporarily lifting the front end of the wrapped article during the placing of the wrapped article, wherein the front holder comprises a sixth linear actuator and a horizontal holding rod or holding plate driven by the sixth linear actuator to move linearly forward and backward.

[0022] Further, the down presser comprises a support and a jet for blowing down the wrapping paper on the front side and the back side of the wrapped object, or the down presser comprises a support, a seventh linear driver vertically arranged on the support and a press rod driven by the seventh linear driver.

[0023] Further, the push presser comprises a slide rail seat fixed on the frame, a guide rail arranged on the slide rail seat and perpendicular to the conveying direction of the belt conveyor, a sliding block in sliding fit with the guide rail, a cross plate arranged on the sliding block, a finger air cylinder connected to the cross plate, a press head arranged on the finger air cylinder and a reset spring for driving the finger air cylinder to reset.

[0024] Or the push presser comprises a support fixed on the frame, an eighth linear driver horizontally arranged on the support and a press head driven by the eighth linear driver.

[0025] The press head is a cylindrical roller or an arc-shaped press plate.

[0026] Further, the rotary coater comprises a roller for dipping the adhesive in the container, a second rotary driver for driving the roller to rotate, a coating brush for dipping the adhesive on the roller and a third rotary driver for driving the coating brush to swing up and down.

[0027] Further, the turnover driver comprises a connecting plate fixedly connected to the back of the turnover plate, two transmission rods arranged on the connecting plate, a transmission plate penetrating between the two transmission rods and a fourth rotary driver for driving the transmission plate to rotate.

[0028] Further, the wrapping production line further comprises a shaping device arranged downstream of the end corner turnover device, the shaping device comprises a fixed shaping plate fixed on both sides of the belt conveyor, a movable shaping plate arranged above the belt conveyor and a connecting device for connecting the movable shaping plate, the connecting device comprises a door-shaped frame arranged above the belt conveyor, a screw rod with the lower end connected to the movable shaping plate and the upper end penetrating through the door-shaped frame, a nut connected to the upper end of the screw rod and a spring sleeved on the screw rod and pressing the movable shaping plate.

[0029] The wrapping production line has the advantages that:

[0030] The wrapping production line can automatically complete various packaging steps such as taking and placing the wrapping paper, taking and placing the wrapped object and folding the wrapping paper, and can replace manual work to complete the wrapping operation of the rectangular object, and the wrapping efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a manual wrapping flowchart;

[0032] Figure 2 It is a three-dimensional schematic view of the wrapping production line;

[0033] Figure 3It is a three-dimensional schematic view of the left and right folding station and the end corner folding station;

[0034] Figure 4 It is a three-dimensional schematic view of the wrapped object taking and placing device part;

[0035] Figure 5 It is a schematic view of another implementation structure of the end corner folding device;

[0036] Figure 6 It is a three-dimensional schematic view of the gluing device;

[0037] Figure 7 It is a three-dimensional schematic view of the end corner folding device. DETAILED DESCRIPTION

[0038] The utility model will be further described in connection with the drawings and examples.

[0039] The wrapping production line in the embodiment comprises a rack 1, further comprises a conveying device, a wrapping paper taking and placing device, a wrapped object taking and placing device, a left and right folding device, an end corner folding device, a gluing device, an end corner folding device and an end corner folding device arranged on the rack; the left and right folding device, the end corner folding device, the end corner folding device and the end corner folding device are sequentially arranged along the conveying device. The gluing device is arranged between the end corner folding device and the end corner folding device, or the gluing device is arranged between the end corner folding device and the end corner folding device.

[0040] The wrapping production line in the embodiment further comprises an automatic control device 2 for controlling the work of the conveying device, the wrapping paper taking and placing device, the wrapped object taking and placing device, the left and right folding device, the end corner folding device, the gluing device, the end corner folding device and the end corner folding device.

[0041] In the embodiment, the conveying device comprises a belt conveyor 3, a positioning member 4 arranged on the conveying belt of the belt conveyor for positioning the wrapped object, an upper side limiter 5 arranged above the belt conveyor for preventing the wrapping paper from being loose and unfolded, and a lateral limiter arranged on both sides of the belt conveyor for preventing the wrapping paper from being loose and unfolded. In the specific implementation, the start and stop of the belt conveyor 3 are controlled by the automatic control device 2, and the stopping position of the belt conveyor 3 can be detected by sensors such as infrared sensors, ultrasonic sensors or Hall sensors. In the embodiment, an ultrasonic sensor 6 is arranged at the head side of the belt conveyor 3, and the ultrasonic sensor 6 is used for positioning the left and right folding station. The conveying belt is provided with a hole 7 beside the positioning member 4, and when the ultrasonic wave signal emitted by the ultrasonic sensor 6 passes through the hole 7, it indicates that the positioning member 4 has reached the left and right folding station. At this time, the automatic control device 2 can control the belt conveyor 3 to stop, and the subsequent devices can be sequentially controlled to work.

[0042] In this embodiment, the positioning member 4 is a limiting strip for limiting the positions of the left and right sides of the packaged articles. The left and right sides of the packaged articles are the two sides in the width direction of the packaged articles. Of course, in different embodiments, the positioning member 4 can also be in other forms, such as a positioning pin or a positioning block, etc. By limiting the positions of the left and right sides of the packaged articles through the positioning member 4, the positions of the packaged articles on the conveying belt can be stabilized.

[0043] In this embodiment, the upper side limiter 5 is a pressing strip arranged along the conveying direction of the belt conveyor. Of course, in different embodiments, the upper side limiter 5 can also be a pressing plate, etc. The lateral limiter includes a turnover limiter located beside the end corner folding device and a fixed limiter located between the turnover limiter and the end corner folding device. The turnover limiter includes a turnover plate 8 and a first rotary driver 9 for driving the turnover plate 8 to rotate. The first rotary driver 9 can be an electric motor or a pneumatic motor. The fixed limiter is a limiting strip 10, a limiting plate 11 or a combination of the limiting strip and the limiting plate.

[0044] The packaging paper taking and placing device includes a paper feeder 12 located at the head end of the conveying device for feeding out the packaging paper, a mechanical gripper 13 for taking and placing the packaging paper, and a first linear driver 14 for driving the mechanical gripper to transfer the packaging paper fed out by the paper feeder to the left and right folding stations. In this embodiment, the mechanical gripper 13 is a pneumatic finger (also called a finger pneumatic cylinder). Of course, the mechanical gripper can also be an electric gripper. The first linear driver 14 is a rodless cylinder. The pneumatic finger is connected to the sliding member of the rodless cylinder through an adapter 15. Of course, the first linear driver 14 can also be in other forms such as a rod cylinder, a hydraulic cylinder or an electric cylinder, etc. When the positioning member 4 stops at the left and right folding stations, the automatic control device 2 controls the paper feeder 12 to feed out a piece of packaging paper, controls the first linear driver 14 to drive the mechanical gripper 13 to move forward to a paper taking position, controls the mechanical gripper 13 to close to take the packaging paper, controls the first linear driver 14 to drive the mechanical gripper 13 to move backward to a paper placing position, and controls the mechanical gripper 13 to open to place the packaging paper, thereby completing the paper taking and placing operation.

[0045] The packing article taking and placing device comprises a magazine 16 for stacking the packing articles in a vertical overlapping manner, a receiving groove 17 located below the magazine, a separator 18 arranged on the receiving groove for separating the lowermost packing article in the magazine, a second linear actuator 19 for driving the receiving groove to move forward and backward, and a blocking device for blocking the packing articles during the backward movement of the receiving groove to force the packing articles to fall onto the wrapping paper. The separator can be a horizontally arranged insertion rod or insertion plate. The blocking device comprises a vertically arranged air cylinder 20 and a vertical blocking rod 21 connected to the end of the piston rod of the air cylinder. In the embodiment, the second linear actuator can be an air cylinder, a hydraulic cylinder or an electric cylinder.

[0046] After the mechanical gripper 13 releases the wrapping paper, the automatic control device 2 controls the second linear actuator 19 to push the receiving groove 17 forward, controls the air cylinder 20 to drive the vertical blocking rod 21 to move downward and block beside the left and right folding stations, controls the second linear actuator 19 to make the receiving groove 17 retreat and reset, and controls the air cylinder 20 to move upward to reset the vertical blocking rod 21. During the forward movement of the receiving groove 17, the packing articles in the front half of the receiving groove 17 are sent above the left and right folding stations, the separator 18 moves away from the magazine 16, and the lowermost packing article in the magazine falls into the rear half of the receiving groove 17. During the backward movement of the receiving groove 17, the packing articles in the front half of the receiving groove 17 fall onto the wrapping paper due to the blocking of the vertical blocking rod 21, and the separator 18 passes through the lower end of the magazine during the backward movement, thereby separating the packing articles in the rear half of the receiving groove 17.

[0047] The left and right folding device comprises left and right paper pushing plates 23 and 24 located on both sides of the left and right folding stations, a third linear actuator 25 for driving the left paper pushing plate to move horizontally, and a fourth linear actuator 26 for driving the right paper pushing plate to move horizontally. The third and fourth linear actuators can be air cylinders, hydraulic cylinders or electric cylinders.

[0048] After the object to be packaged is placed on the wrapping paper, the automatic control device 2 controls the third linear driver 25 and the fourth linear driver 26 to push the left and right paper boards 23 and 24 forward respectively, so as to fold the wrapping paper on the left and right sides of the object to be packaged to the top surface of the object to be packaged. After the left and right folding is completed, the automatic control device 2 controls the belt conveyor 3 to start, so as to send the object to be packaged which is wrapped on the left and right sides to the downstream packaging station.

[0049] The end folding angle device comprises a depressor for depressing the wrapping paper on the front side and the rear side of the object to be packaged and a pusher for pushing the wrapping paper which has been depressed from the left and right sides, and the pusher is arranged on the front side and the rear side of the object to be packaged.

[0050] In the embodiment, the depressor comprises a support 27 and a gas jet 28 for downwardly blowing gas to the wrapping paper on the front side and the rear side of the object to be packaged; the gas jet 28 can be a gas valve or a gas nozzle, and the gas valve or the gas nozzle is connected with a gas source through a pipeline, and downwardly blowing gas can be realized by controlling the gas valve or the gas source (the gas source can be a gas pump) through the automatic control device 2. In the embodiment, the pusher comprises a slide rail seat 29 fixed on the machine frame, a guide rail 30 arranged on the slide rail seat and perpendicular to the conveying direction of the belt conveyor, a sliding block 31 in sliding cooperation with the guide rail, a cross plate 32 arranged on the sliding block, a finger air cylinder 33 connected with the cross plate, a pressure head 34 arranged on the finger air cylinder, and a reset spring 35 for driving the finger air cylinder to reset, the reset spring 35 can be a tension spring or a compression spring, and the installation mode of the reset spring 35 can be determined according to the type of the selected spring; for example, in the embodiment, the reset spring 35 is a tension spring, one end of the tension spring is connected with the cross plate 32, and the other end of the tension spring is connected with a connecting plate, and the connecting plate is fixed on the front end of the guide rail 30. The pressure head can be a cylindrical roller or an arc-shaped pressing plate, and the flatness of the cylindrical roller is better. Of course, in the specific implementation, the pusher in the embodiment does not exclude the fixed arrangement of the finger air cylinder 33, but the structure that the finger air cylinder 7 in the embodiment can reciprocate along the slide rail can improve the flatness of the end angle folding and the folding quality is better.

[0051] After the object to be packaged reaches the end folding angle station, the automatic control device 2 controls the gas jet 28 to downwardly blow gas to the wrapping paper on the front side and the rear side of the object to be packaged, and then controls the fingers of the finger air cylinder 33 to fold to the middle, and the pressure head 34 simultaneously pushes from the left and right sides to the middle during the folding process, so as to realize the inward folding of the wrapping paper on the end, and thus the end folding angle is completed.

[0052] After the end corner is finished, the automatic control device 2 first controls the first rotary driver 9 of the turnover limiter to drive the flap 8 to turn up, so as to block the end corner, to prevent the loose end corner from being loosened and unfolded. After the flap 8 is turned up, the fingers of the finger cylinder 33 are controlled to be opened to both sides, and the reset spring 35 drives the finger cylinder to reset during the opening of the fingers.

[0053] Of course, in different embodiments, the lower presser and the push presser can also have other forms. For example, the lower presser can be a support frame 36, a seventh linear driver 37 vertically arranged on the support frame, and a press rod 38 driven by the seventh linear driver. The push presser can be a support 39 fixed on the rack, an eighth linear driver 40 horizontally arranged on the support, and a press head driven by the eighth linear driver. The seventh linear driver and the eighth linear driver can be a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.

[0054] In this embodiment, the glue applying device is arranged between the end corner device and the end corner turning device. The glue applying device comprises a container 41 for storing adhesive and a transfer coater for transferring the adhesive in the container to the wrapping paper. In this embodiment, the transfer coater comprises a roller 42 for dipping the adhesive in the container, a second rotary driver 43 for driving the roller to rotate, a coating brush 44 for dipping the adhesive on the roller, and a third rotary driver 45 for driving the coating brush to swing up and down. The second rotary driver 43 and the third rotary driver 45 can be an electric motor or a pneumatic motor. When the wrapped object reaches the glue applying station after the end corner is finished, the automatic control device controls the second rotary driver 43 to drive the roller to rotate, so that the roller is covered with the adhesive in sequence, and then controls the third rotary driver 45 to drive the coating brush to swing up and down, so that the coating brush dips the adhesive on the roller and transfers it to the wrapped end corner of the wrapping paper. As an improvement of the glue applying device, a scraper 46 for controlling the thickness of the adhesive on the roller is arranged on the container 41, and the position of the scraper can be adjusted to facilitate on-site adjustment of the amount of glue. The structure of the transfer coater can also be adjusted as needed. For example, the transfer coater can also be a combination of a pump and a delivery pipe, which can pump the adhesive in the container out through the delivery pipe to the glue applying position, which can also complete the glue applying work. The glue applying position can be the end corner of the wrapping paper, or the position on the side surface of the wrapped object to be bonded with the end corner. At the same time, the glue applying device can also be arranged between the end corner turning device and the end corner pressing device.

[0055] In the embodiment, the end corner turning-up device comprises a vertical plate 47 beside the belt conveyor and a fifth linear driver 48 for driving the vertical plate to move up and down. The fifth linear driver 48 can be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder. When the wrapped object moves to the end corner turning-up station, the automatic control device 2 controls the fifth linear driver 48 to drive the vertical plate 47 to move up, and the vertical plate 47 pushes the end corner of the wrapping paper to turn up to the vertical state. Then the turned-up end corner moves along the vertical plate 47 to the inside of the limiting plate 11 and moves to the end corner pressing device downstream.

[0056] The end corner pressing device comprises a turning plate 49 hinged beside the belt conveyor and a turning driver for driving the turning plate to turn. In the embodiment, the turning driver comprises a connecting plate 50 fixedly connected to the back of the turning plate, two transmission rods 51 arranged on the connecting plate, a transmission plate 52 passing between the two transmission rods and a fourth rotary driver 53 for driving the transmission plate to rotate. The fourth rotary driver can be an electric motor or a pneumatic motor. A rotatable rolling sleeve or bearing can also be arranged on the transmission rod 51 to reduce the movement resistance. When the turning driver is not required, a connecting rod mechanism can also be used. When the wrapped object moves to the end corner pressing mechanism, the automatic control device 2 controls the fourth rotary driver 53 to rotate, and then drives the turning plate 49 to rotate through the transmission plate 52, the transmission rod 51 and the connecting plate 50, so as to press and paste the end corner of the wrapping paper on the wrapping paper on the upper side of the wrapped object.

[0057] Through the above process, the wrapping operation of the wrapped object is realized.

[0058] As an improvement of the above embodiment, the wrapped object taking and placing device further comprises a front supporting device for temporarily supporting the front end of the wrapped object during the placing process. The front supporting device comprises a sixth linear driver 54 and a horizontal supporting rod 55 or a supporting plate driven by the sixth linear driver to move linearly forward and backward. Before the receiving groove retreats, the automatic control device 2 first controls the sixth linear driver 54 to drive the horizontal supporting rod 55 to move forward to the lower side of the outlet of the receiving groove. When the wrapped object is discharged from the outlet of the receiving groove, the front end of the wrapped object falls on the horizontal supporting rod first. When the rear end of the wrapped object is about to be discharged from the receiving groove, the automatic control device 2 controls the sixth linear driver 54 to retreat and reset. In this way, the front and rear ends of the wrapped object can fall downward at the same time, which can better ensure the correctness of the front and rear positions of the wrapped object on the belt conveyor.

[0059] As the improvement of the above-mentioned embodiment, the wrapping production line further comprises a shaping device arranged downstream of the end corner turning device, the shaping device comprising fixed shaping plates 56 fixed on both sides of the belt conveyor, a movable shaping plate 57 arranged above the belt conveyor, and a connecting device for connecting the movable shaping plate, the connecting device comprising a door-shaped frame 58 arranged above the belt conveyor, a screw rod 59 with the lower end connected to the movable shaping plate and the upper end penetrating through the door-shaped frame, a nut 60 connected to the upper end of the screw rod, and a spring 61 sleeved on the screw rod for pressing the movable shaping plate. The front and rear end faces and the upper side face of the package are pressed and shaped by the shaping device, so that the appearance quality of the package is improved.

[0060] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. Wrapping line comprising a frame, characterized in that: The packaging machine further comprises a conveying device, a wrapping paper taking and placing device, a packaged object taking and placing device, a left-right folding device, an end corner folding device, a gluing device, an end corner turning device and an end corner pressing device, which are arranged on the frame; the left-right folding device, the end corner folding device, the end corner turning device and the end corner pressing device are arranged in sequence along the conveying device, the gluing device is arranged between the end corner folding device and the end corner turning device, or the gluing device is arranged between the end corner turning device and the end corner pressing device; The conveying device comprises a belt conveyor, a positioning member arranged on the conveying belt of the belt conveyor for positioning the packaged objects, an upper side limiter arranged above the belt conveyor for preventing the wrapping paper from being unfolded, and a lateral limiter arranged on both sides of the belt conveyor for preventing the wrapping paper from being unfolded. The wrapping paper taking and placing device comprises a paper feeder arranged at the head end of the conveying device for feeding the wrapping paper, a mechanical gripper for taking and placing the wrapping paper, and a first linear actuator for driving the mechanical gripper to transfer the wrapping paper fed by the paper feeder to the left-right folding station. The packaged object taking and placing device comprises a magazine for vertically stacking the packaged objects, a receiving groove arranged below the magazine, a separator arranged on the receiving groove for separating the lowermost packaged object in the magazine, a second linear actuator for driving the receiving groove to move back and forth, and a stopper for blocking the packaged object during the backward movement of the receiving groove to force the packaged object to fall onto the wrapping paper. The left-right folding device comprises a left paper pushing plate and a right paper pushing plate arranged on both sides of the left-right folding station, a third linear actuator for driving the left paper pushing plate to translate, and a fourth linear actuator for driving the right paper pushing plate to translate. The end corner folding device comprises a lower presser for pressing the wrapping paper on the front side and the rear side of the packaged object, and a pushing presser arranged on both sides of the front side and the rear side of the packaged object for pushing the wrapping paper that has been pressed. The gluing device comprises a container for storing adhesive, and a transfer coater for transferring the adhesive in the container to the wrapping paper. The end corner turning device comprises a vertical plate arranged beside the belt conveyor, and a fifth linear actuator for driving the vertical plate to move up and down. The end corner pressing device comprises a turning plate hinged beside the belt conveyor, and a turning actuator for driving the turning plate to turn.

2. The wrapping line according to claim 1, characterized in that: The positioning member is a limiting strip or a limiting pin for limiting the positions of the left and right sides of the packaged objects; the upper side limiter is a pressing strip or a pressing plate arranged along the conveying direction of the belt conveyor; the lateral limiter comprises a turning limiter arranged beside the end corner folding device, and a fixed limiter arranged between the turning limiter and the end corner pressing device, which is a limiting strip, a limiting plate or a combination of a limiting strip and a limiting plate.

3. The wrapping line according to claim 1, characterized in that: The mechanical gripper is a pneumatic finger, and the first linear actuator is a rodless cylinder; the pneumatic finger is connected to the outer sliding block of the rodless cylinder through an adapter.

4. The wrapping line according to claim 1, characterized in that: The separator is a horizontally arranged insertion rod or insertion plate; the stopper comprises a vertically arranged cylinder and a vertical stopper rod connected to the end of the piston rod of the cylinder.

5. The wrapping line according to claim 1, characterized in that: The packing object taking and placing device further comprises a front supporting device for temporarily supporting the front end of the packed object during the placing of the packed object, the front supporting device comprising a sixth linear actuator and a horizontal supporting rod or supporting plate driven by the sixth linear actuator to move linearly forward and backward.

6. The wrapping line according to claim 1, characterized in that: The lower pressing device comprises a supporting frame and a jetting device for jetting air downward to the front and rear sides of the packing paper of the packed object, or the lower pressing device comprises a supporting frame, a seventh linear actuator vertically arranged on the supporting frame, and a pressing rod driven by the seventh linear actuator to move.

7. The wrapping line according to claim 1, characterized in that: The pushing and pressing device comprises a sliding rail base fixed on the machine frame, a guide rail arranged on the sliding rail base and perpendicular to the conveying direction of the belt conveyor, a sliding block slidingly matched with the guide rail, a cross plate arranged on the sliding block, a finger air cylinder connected to the cross plate, a pressing head arranged on the finger air cylinder, and a reset spring for driving the finger air cylinder to reset. Or the pushing and pressing device comprises a supporting base fixed on the machine frame, an eighth linear actuator horizontally arranged on the supporting base, and a pressing head driven by the eighth linear actuator. The pressing head is a cylindrical roller or an arc-shaped pressing plate.

8. The wrapping line according to claim 1, characterized in that: The turning and coating device comprises a roller for dipping the adhesive in the container, a second rotary actuator for driving the roller to rotate, a coating brush for dipping the adhesive on the roller, and a third rotary actuator for driving the coating brush to swing up and down.

9. The wrapping line according to claim 1, characterized in that: The turning driving device comprises a connecting plate fixedly connected to the back of the turning plate, two transmission rods arranged on the connecting plate, a transmission plate penetrating between the two transmission rods, and a fourth rotary actuator for driving the transmission plate to rotate.

10. The wrapping line according to claim 1, characterized in that: Further comprising a shaping device arranged downstream of the end corner turning and pressing device, the shaping device comprising fixed shaping plates fixed on both sides of the belt conveyor, a movable shaping plate arranged above the belt conveyor, and a connecting device for connecting the movable shaping plate, the connecting device comprising a door-shaped frame arranged above the belt conveyor, a screw rod with the lower end connected to the movable shaping plate and the upper end penetrating through the door-shaped frame, a nut connected to the upper end of the screw rod, and a spring sleeved on the screw rod to press the movable shaping plate.

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