An automatic cardboard box fastening device

Abstract

This invention provides an automatic cardboard box fastening device, comprising: a placement seat placed on a workbench, the placement seat being positioned by a plurality of positioning blocks fixedly installed on the workbench, the positioning blocks respectively contacting the four sides of the placement seat, and the placement seat having placement slots for placing a plurality of cardboard box pieces to be processed; wherein, the workbench has a plurality of positioning slots for placing the cardboard box pieces; and the workbench is equipped with a feeding mechanism for transferring the cardboard box pieces in the placement seat to the positioning slots. The automatic cardboard box fastening device provided by this invention can automatically load and unload materials, automatically fasten the cardboard box pieces into the required cardboard box shape, has a high degree of automation, and improves the production efficiency of cardboard boxes.

Description

Technical Field

[0001] This invention relates to the field of cardboard box production technology, and in particular to an automatic cardboard box fastening device. Background Technology

[0002] Cardboard boxes are boxes produced and assembled from paper sheets, such as... Figure 10 The image shown is a cardboard box with a specific structure as described in this application. Figure 11 This is a side view of the cardboard box of this application. The cardboard box is formed by joining strips of paper together and fastening them together. It has rectangular openings / open structures on both sides. The side length and height of the cardboard box are both about 12mm, and the width of the fastening point is only about 5mm.

[0003] Currently, cardboard boxes are snapped together manually, which has problems such as low snapping efficiency and inconvenience in operation. It can usually only achieve a snapping efficiency of 3-4 boxes per minute. Due to their small size, they are very easy for operators to operate flexibly and cause eye fatigue. At the same time, the snapped cardboard boxes are irregular (non-rectangular opening structure). Summary of the Invention

[0004] In response to at least the technical problems mentioned in the background section, the present invention provides an automatic cardboard box fastening device.

[0005] The present invention provides an automatic cardboard box fastening device, comprising: a placement seat placed on a workbench, the placement seat being positioned by a plurality of positioning blocks fixedly installed on the workbench, the plurality of positioning blocks respectively contacting the four sides of the placement seat, the placement seat having placement slots for placing a plurality of cardboard box pieces to be processed; wherein, the workbench has a plurality of positioning slots for placing cardboard box pieces; the workbench is equipped with a feeding mechanism for transferring the cardboard box pieces in the placement seat to the positioning slots; and the workbench is provided with an automatic fastening mechanism for fastening the cardboard box pieces into a cardboard box state.

[0006] The cardboard box sheet includes a first end, a middle part, a second end, and an insertion hole formed at the connection between the first end and the middle part. The insertion hole is adapted to the second end. The feeding mechanism includes a first upright plate, a rodless cylinder, a first lifting cylinder, a mounting plate, multiple connecting pipes, multiple springs, and multiple suction cups. The first upright plate is fixedly mounted on the workbench. The rodless cylinder is fixedly mounted on one side of the first upright plate. The first lifting cylinder is fixedly mounted on the movable seat of the rodless cylinder. The mounting plate is fixedly mounted on the bottom end of the output rod of the first lifting cylinder. The multiple connecting pipes are slidably mounted on the mounting plate. The multiple suction cups are respectively fixedly mounted on the bottom ends of the multiple connecting pipes. The multiple suction cups are respectively located directly above the placement slot of the placement seat. The multiple springs are respectively slidably sleeved on the multiple connecting pipes. Each of the multiple connecting pipes is fixedly sleeved with a limiting block. The limiting block is located above the mounting plate. The top ends of the multiple connecting pipes are connected to an external vacuum pump through flexible hoses.

[0007] Preferably, the automatic fastening mechanism includes a rectangular rod for setting the shape of the cardboard box and a moving mechanism for driving the rectangular rod to move. It also includes a lifting and bending mechanism, a first bending mechanism, a blocking mechanism, a second bending mechanism, a horizontal bending mechanism, and an insertion mechanism. The moving mechanism includes a connecting block and a feeding cylinder. The feeding cylinder is fixedly installed at the bottom of the worktable. The connecting block is fixedly installed at one end of the output rod of the feeding cylinder. One end of the rectangular rod is fixedly installed on one side of the connecting block. A feeding stop is also fixedly installed on the worktable. The feeding stop has a rectangular sliding hole adapted to the rectangular rod. The rectangular rod passes through the rectangular sliding hole and is slidably connected to the rectangular sliding hole. The feeding stop is used to push the cardboard box fastened on the rectangular rod off the rectangular rod so that the cardboard box falls down.

[0008] Preferably, a protective cylinder is fixedly installed on one side of the workbench, and the connecting block and the rectangular rod are both located inside the protective cylinder.

[0009] Preferably, the lifting and bending mechanism includes a support frame, a second lifting cylinder, a support plate, and two lifting seats. The support frame is fixedly installed at the bottom of the workbench, the second lifting cylinder is fixedly installed on the support frame, the support plate is fixedly installed at the top of the output rod of the second lifting cylinder, and the two lifting seats are fixedly installed at the top of the support plate. The two lifting seats pass through two through holes opened at the bottom of the workbench, and the two through holes are connected to the positioning groove.

[0010] Preferably, the first bending mechanism includes a first horizontal cylinder and a horizontal push block. The first horizontal cylinder is fixedly installed on the top of the workbench, and the horizontal push block is fixedly installed on one end of the output rod of the first horizontal cylinder. The horizontal push block has multiple notches on one side. The width of the notches is less than the minimum width of the first end of the paper box sheet and greater than the maximum width of the second end. The first bending mechanism is used to bend the first end of the paper box sheet between the middle part and the middle part.

[0011] Preferably, the second bending mechanism includes a second upright plate, a first tilting cylinder, and a tilting push block. The second upright plate is fixedly installed on the top of the workbench. The first tilting cylinder is assembled on one side of the second upright plate. The tilting push block is fixedly installed on the output rod of the first tilting cylinder. The tilting push block has multiple protrusions, which are adapted to multiple notches on the horizontal push block. The width of the protrusions is smaller than the width of the notches. The second bending mechanism is used to bend the second end of the paper box sheet between the second end and the middle part.

[0012] Preferably, the blocking mechanism includes a third upright plate, a second tilting cylinder, and a tilting block. The third upright plate is fixedly installed on the top of the workbench, the second tilting cylinder is assembled on one side of the third upright plate, and the tilting block is fixedly installed on the output rod of the second tilting cylinder. The blocking mechanism is used to block the cardboard box when the second end of the cardboard box sheet is inserted into the insertion hole, so that the second end can be inserted into the insertion hole.

[0013] Preferably, the horizontal bending mechanism includes a second horizontal cylinder and a horizontal pusher plate. The second horizontal cylinder is fixedly installed on the top of the worktable, and the horizontal pusher plate is fixedly installed on one end of the output rod of the second horizontal cylinder.

[0014] Preferably, the insertion mechanism includes a fourth upright plate, a third tilting cylinder, and a tilting pusher. The fourth upright plate is fixedly installed on the top of the workbench, the third tilting cylinder is assembled on the fourth upright plate, and the tilting pusher is fixedly installed on the bottom end of the output rod of the third tilting cylinder. The insertion mechanism is used to insert the second end of the paper box sheet into the insertion hole.

[0015] Beneficial effects: By setting up a feeding mechanism on the workbench, the paper box pieces in the placement seat can be automatically fed, and the paper box pieces can be automatically snapped into the required cardboard box shape by the snap-fit ​​mechanism, and then automatically unloaded. The degree of automation is high, which improves the production efficiency of cardboard boxes.

[0016] Using the solution of this invention, a fastening efficiency of 60-100 pieces per minute can be achieved, fundamentally avoiding the problems of operators having difficulty operating flexibly and eye fatigue. At the same time, it can ensure the neatness of the fastened cardboard boxes (a standard rectangular open structure) and that the cardboard boxes are not damaged after fastening. Attached Figure Description

[0017] Figure 1 This is a side view of a preferred embodiment of the automatic cardboard box fastening device provided by the present invention.

[0018] Figure 2 This is a side view assembly diagram of the blocking mechanism and the second bending mechanism in this invention;

[0019] Figure 3 This is a side view assembly diagram of the first bending mechanism and the horizontal bending mechanism in this invention;

[0020] Figure 4 This is a side view assembly diagram of the feeding mechanism, placement seat, and worktable in this invention;

[0021] Figure 5 This is a side sectional view of the lifting and bending mechanism in this invention.

[0022] Figure 6 This is a front sectional view of the assembly of the rectangular rod and the moving mechanism in this invention;

[0023] Figure 7 This is a top view of the assembly of the rectangular rod and the moving mechanism in this invention;

[0024] Figure 8 This is a three-dimensional structural diagram of the placement base in this invention;

[0025] Figure 9 This is a top view schematic diagram of the horizontal push block and the inclined push block in this invention;

[0026] Figure 10 This is a top view of the paper box sheet in this invention;

[0027] Figure 11 This is a schematic diagram of the structure of the paper box sheet folded into a cardboard box state in this invention.

[0028] Labels in the diagram: 1. Workbench; 2. Placement seat; 3. Positioning block; 4. Cardboard box sheet; 5. First upright plate; 6. Rodless cylinder; 7. First lifting cylinder; 8. Mounting plate; 9. Connecting pipe; 10. Spring; 11. Suction cup; 12. Discharge stop block; 13. Rectangular rod; 14. Connecting block; 15. Discharge cylinder; 16. Protective cylinder; 17. Support frame; 18. Second lifting cylinder; 19. Support plate; 20. Lifting seat; 21. First 21. Horizontal cylinder; 22. Horizontal push block; 23. Second vertical plate; 24. First tilting cylinder; 25. Tilting push block; 26. Third vertical plate; 27. Second tilting cylinder; 28. Tilting stop block; 29. ​​Second horizontal cylinder; 30. Horizontal push plate; 31. Fourth vertical plate; 32. Third tilting cylinder; 33. Tilting push plate; 34. Positioning groove; 401. Middle part; 402. First end; 403. Second end; 404. Insertion hole. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Please refer to the following: Figure 1-11 An automatic cardboard box fastening device includes: a placement seat 2 placed on a workbench 1, the placement seat 2 being positioned by a plurality of positioning blocks 3 fixedly installed on the workbench 1, the plurality of positioning blocks 3 respectively contacting the four sides of the placement seat 2, the placement seat 2 having placement slots for placing a plurality of cardboard box pieces 4 to be processed; wherein, the workbench 1 has a plurality of positioning slots 34 for placing the cardboard box pieces 4; the workbench 1 is equipped with a feeding mechanism for transferring the cardboard box pieces 4 in the placement seat 2 into the positioning slots 34; and the workbench 1 is provided with an automatic fastening mechanism for fastening the cardboard box pieces 4 into a cardboard box state.

[0031] The cardboard box sheet 4 includes a first end 401, a middle portion 402, a second end 403, and an insertion hole 404 formed at the connection between the first end 401 and the middle portion 402. The insertion hole 404 is adapted to the second end 403. The feeding mechanism includes a first upright plate 5, a rodless cylinder 6, a first lifting cylinder 7, a mounting plate 8, multiple connecting pipes 9, multiple springs 10, and multiple suction cups 11. The first upright plate 5 is fixedly installed on the workbench 1. The rodless cylinder 6 is fixedly installed on one side of the first upright plate 5. The first lifting cylinder 7 is fixedly installed on the movable seat of the rodless cylinder 6. The mounting plate 8 is fixedly installed on the workbench 1. Installed at the bottom end of the output rod of the first lifting cylinder 7, multiple connecting pipes 9 are slidably mounted on the mounting plate 8, multiple suction cups 11 are respectively fixedly mounted at the bottom ends of multiple connecting pipes 9, multiple suction cups 11 are respectively located directly above the placement groove of the placement seat 2, multiple springs 10 are respectively slidably sleeved on multiple connecting pipes 9, and each of the multiple connecting pipes 9 is fixedly sleeved with a limiting block, the limiting block being located above the mounting plate 8, and the top ends of multiple connecting pipes 9 are connected to an external vacuum pump through a flexible hose. The paper box sheet 4 in the placement seat 2 can be automatically transferred to the positioning groove 34 on the worktable 1 through the feeding mechanism.

[0032] The automatic fastening mechanism includes a rectangular rod 13 for setting the shape of the cardboard box and a moving mechanism for driving the rectangular rod 13 to move. It also includes a lifting and bending mechanism, a first bending mechanism, a blocking mechanism, a second bending mechanism, a horizontal bending mechanism, and an insertion mechanism. The moving mechanism includes a connecting block 14 and a feeding cylinder 15. The feeding cylinder 15 is fixedly installed at the bottom of the workbench 1, and the connecting block 14 is fixedly installed at one end of the output rod of the feeding cylinder 15. One end of the rectangular rod 13 is fixed... A feeding stop block 12 is fixedly installed on one side of the connecting block 14. The feeding stop block 12 has a rectangular sliding hole adapted to the rectangular rod 13. The rectangular rod 13 passes through the rectangular sliding hole and is slidably connected to the rectangular sliding hole. The feeding stop block 12 is used to push the cardboard box that is fastened on the rectangular rod 13 off the rectangular rod 13 so that the cardboard box falls down. The rectangular rod 13 can be moved to the cardboard box piece 4 in the positioning groove 34 by the moving mechanism, and the cardboard box that is fastened can also be fed.

[0033] A protective cylinder 16 is fixedly installed on one side of the workbench 1. The connecting block 14 and the rectangular rod 13 are both located inside the protective cylinder 16. The protective cylinder 16 is used to shield the rectangular rod 13 and the connecting block 14 to prevent injury due to accidental contact during processing.

[0034] The lifting and bending mechanism includes a support frame 17, a second lifting cylinder 18, a support plate 19, and two lifting seats 20. The support frame 17 is fixedly installed at the bottom of the workbench 1. The second lifting cylinder 18 is fixedly installed on the support frame 17. The support plate 19 is fixedly installed at the top of the output rod of the second lifting cylinder 18. The two lifting seats 20 are fixedly installed at the top of the support plate 19. The two lifting seats 20 pass through two through holes opened at the bottom of the workbench 1. The two through holes are connected to the positioning groove 34. The lifting and bending mechanism can first bend the middle part 401 of the paper box sheet 4 into a U-shape.

[0035] The first bending mechanism includes a first horizontal cylinder 21 and a horizontal push block 22. The first horizontal cylinder 21 is fixedly installed on the top of the workbench 1, and the horizontal push block 22 is fixedly installed on one end of the output rod of the first horizontal cylinder 21. The horizontal push block 22 has multiple notches on one side. The width of the notches is less than the minimum width of the first end 401 of the paper box sheet 4 and greater than the maximum width of the second end 403. The first bending mechanism is used to bend the first end 401 of the paper box sheet 4 and the middle part 402.

[0036] The second bending mechanism includes a second upright plate 23, a first tilting cylinder 24, and a tilting push block 25. The second upright plate 23 is fixedly installed on the top of the workbench 1. The first tilting cylinder 24 is assembled on one side of the second upright plate 23. The tilting push block 25 is fixedly installed on the output rod of the first tilting cylinder 24. The tilting push block 25 is provided with multiple protrusions, and the multiple protrusions are respectively adapted to multiple notches on the horizontal push block 22. The width of the protrusions is smaller than the width of the notches. The second bending mechanism is used to bend the second end 403 and the middle part 402 of the paper box sheet 4.

[0037] The blocking mechanism includes a third upright plate 26, a second tilting cylinder 27, and a tilting block 28. The third upright plate 26 is fixedly installed on the top of the workbench 1. The second tilting cylinder 27 is assembled on one side of the third upright plate 26. The tilting block 28 is fixedly installed on the output rod of the second tilting cylinder 27. The blocking mechanism is used to block the cardboard box when the second end 403 of the cardboard box piece 4 is inserted into the insertion hole 404, so that the second end 403 can be inserted into the insertion hole 404.

[0038] The horizontal bending mechanism includes a second horizontal cylinder 29 and a horizontal pusher 30. The second horizontal cylinder 29 is fixedly installed on the top of the workbench 1, and the horizontal pusher 30 is fixedly installed on one end of the output rod of the second horizontal cylinder 29. The horizontal bending mechanism is used to bend a section of the paper box sheet 4 near the middle part 401 of the second end 403, so that the middle part 401 is formed into a rectangle.

[0039] The insertion mechanism includes a fourth upright plate 31, a third tilting cylinder 32, and a tilting pusher 33. The fourth upright plate 31 is fixedly installed on the top of the workbench 1. The third tilting cylinder 32 is mounted on the fourth upright plate 31. The tilting pusher 33 is fixedly installed on the bottom end of the output rod of the third tilting cylinder 32. The insertion mechanism is used to insert the second end 403 of the paper box sheet 4 into the insertion hole 404.

[0040] The working principle of the automatic cardboard box fastening device provided by this invention is as follows:

[0041] This solution also includes an electrical control cabinet, which is installed on the equipment. During use, each piece of electrical equipment can be started and operated separately through the electrical control cabinet. The power connection method of each piece of electrical equipment is an existing mature technology and is well known to those in the field, so it will not be described in detail here.

[0042] When in use, first stack the cardboard pieces 4 in the placement slot inside the placement seat 2, then position the placement seat 2 on the workbench 1 so that the positioning blocks 3 abut against the four sides of the placement seat 2 respectively.

[0043] By activating the first lifting cylinder 7 and the external vacuum pump (not shown in the figure), multiple suction cups 11 are used to pick up multiple cardboard pieces 4 in the placement seat 2. One cardboard piece 4 is picked up by two suction cups 11. The first lifting cylinder 7 is used to raise the cardboard piece 4 picked up by the suction cups 11. Then, by activating the rodless cylinder 6, the suction cups 11 and the picked-up cardboard pieces 4 are moved to the position slot 34 on the worktable 1. The first lifting cylinder 7 is used to lower the cardboard piece 4 and, in conjunction with the vacuum pump, place multiple cardboard pieces 4 in the position slot 34. Finally, the rodless cylinder 6 and the first lifting cylinder 7 are used to return the suction cups 11 to their initial position.

[0044] Then, by activating the feeding cylinder 15, the rectangular rod 13 is moved to the position groove 34 directly above the paper box piece 4, and the distance between the bottom of the rectangular rod 13 and the paper box piece 4 is less than 2mm.

[0045] Next, the second lifting cylinder 18 is activated to raise the two lifting seats 20. The two lifting seats 20 cooperate with the rectangular rod 13 to bend the middle part 401 of the cardboard box 4 into a U-shape, so that the cardboard box 4 is attached to the sides and bottom of the rectangular rod 13.

[0046] Activate the first horizontal cylinder 21 again to push the first end 402 of the paper box sheet 4 with the horizontal push block 22, so that the connection between the first end 402 and the middle part 401 is bent.

[0047] Re-activate the first tilting cylinder 24 to push the tilting push block 25 to push the second end 403 of the paper box sheet 4, and the rectangular rod 13 and the horizontal push block 22 abut against the middle part 401, thereby bending the connection between the second end 403 and the middle part 401. Then, the first tilting cylinder 24 and the first horizontal cylinder 21 return to the initial state.

[0048] Then, the second tilting cylinder 27 is activated to move the tilting block 28 to abut against a section of the middle part 401 near the first end 402. Then, the second horizontal cylinder 29 is activated to move the horizontal pusher 30 and push a section of the middle part 401 near the second end 403 to bend it, thereby forming the middle part 401 into a rectangle.

[0049] Then, the third tilting cylinder 32 is activated to move the tilting pusher 33 diagonally downward, pushing the second end 403, and under the restriction of the tilting stop 28, the second end 403 is inserted into the insertion hole 404, thus completing the assembly of the card box;

[0050] Then, the third tilting cylinder 32, the second horizontal cylinder 29, the first tilting cylinder 24, and the second lifting cylinder 18 return to their initial state. Then, the feeding cylinder 15 is activated to extend the output rod, which drives the rectangular rod 13 and the multiple cardboard boxes on it to move. During the movement, the cardboard boxes are blocked by the feeding block 12 and pushed off the rectangular rod 13 and fall down. An inclined guide plate and a collection box can be set below to collect the cardboard boxes.

[0051] This completes all the steps for snapping together the cardboard box. Repeat the above steps to continue snapping together the four cardboard pieces to form the cardboard box.

[0052] This invention provides an automatic cardboard box fastening device. By setting a feeding mechanism on the workbench 1, the cardboard box pieces 4 in the placement seat 2 can be automatically fed, and the cardboard box pieces 4 can be automatically fastened into the required cardboard box shape by the fastening mechanism, and then automatically unloaded. The device has a high degree of automation and improves the production efficiency of cardboard boxes.

[0053] Using the solution of this invention, a fastening efficiency of 60-100 pieces per minute can be achieved (the fastening efficiency can be adjusted according to the cylinder operating frequency and the number of placement slots in the placement seat 2, and a minimum fastening efficiency of 60 pieces per minute can be achieved), fundamentally avoiding the problems of operators having difficulty operating flexibly and eye fatigue, while ensuring the neatness of the fastened cardboard boxes (a standard rectangular open structure), and the cardboard boxes are undamaged after fastening.

Claims

1. An automatic cardboard box fastening device, characterized in that, include: A placement seat is placed on a workbench. The placement seat is positioned by several positioning blocks fixedly installed on the workbench. The positioning blocks contact the four sides of the placement seat respectively. The placement seat has a placement slot for placing several paper box pieces to be processed. The workbench has several positioning slots for placing paper box pieces. The workbench is equipped with a feeding mechanism for transferring the paper box pieces in the placement seat to the positioning slot; and the workbench is provided with an automatic fastening mechanism for fastening the paper box pieces into a cardboard box state. The cardboard box sheet includes a first end, a middle part, a second end, and an insertion hole formed at the connection between the first end and the middle part, wherein the insertion hole is adapted to the second end; The automatic fastening mechanism includes a rectangular rod for setting the shape of the cardboard box and a moving mechanism for driving the rectangular rod to move. It also includes a lifting and bending mechanism, a first bending mechanism, a blocking mechanism, a second bending mechanism, a horizontal bending mechanism, and an insertion mechanism. The moving mechanism includes a connecting block and a feeding cylinder. The feeding cylinder is fixedly installed at the bottom of the worktable. The connecting block is fixedly installed at one end of the output rod of the feeding cylinder. One end of the rectangular rod is fixedly installed on one side of the connecting block. A feeding stop block is also fixedly installed on the worktable. The first bending mechanism includes a first horizontal cylinder and a horizontal push block. The first horizontal cylinder is fixedly installed on the top of the workbench, and the horizontal push block is fixedly installed on one end of the output rod of the first horizontal cylinder. The horizontal push block has multiple notches on one side. The width of the notches is smaller than the minimum width of the first end of the paper box sheet and larger than the maximum width of the second end. The first bending mechanism is used to bend the first end of the paper box sheet between the middle part and the middle part. The second bending mechanism includes a second vertical plate, a first tilting cylinder, and a tilting push block. The second vertical plate is fixedly installed on the top of the workbench. The first tilting cylinder is assembled on one side of the second vertical plate. The tilting push block is fixedly installed on the output rod of the first tilting cylinder. The tilting push block has multiple protrusions, which are adapted to multiple notches on the horizontal push block. The width of the protrusions is smaller than the width of the notches. The second bending mechanism is used to bend the second end of the paper box sheet between the second end and the middle part. The blocking mechanism includes a third vertical plate, a second tilting cylinder, and a tilting block.

2. The automatic cardboard box fastening device according to claim 1, characterized in that, The feeding mechanism includes a first upright plate, a rodless cylinder, a first lifting cylinder, a mounting plate, multiple connecting pipes, multiple springs, and multiple suction cups. The first upright plate is fixedly mounted on the workbench. The rodless cylinder is fixedly mounted on one side of the first upright plate. The first lifting cylinder is fixedly mounted on the movable seat of the rodless cylinder. The mounting plate is fixedly mounted on the bottom end of the output rod of the first lifting cylinder. The multiple connecting pipes are slidably mounted on the mounting plate. The multiple suction cups are respectively fixedly mounted on the bottom ends of the multiple connecting pipes and are respectively located directly above the placement slot of the placement seat. The multiple springs are respectively slidably sleeved on the multiple connecting pipes. Each of the multiple connecting pipes is fixedly sleeved with a limiting block, which is located above the mounting plate. The top ends of the multiple connecting pipes are connected to an external vacuum pump through flexible hoses.

3. The automatic cardboard box fastening device according to claim 2, characterized in that, The feeding stop has a rectangular sliding hole that matches the rectangular rod. The rectangular rod passes through the rectangular sliding hole and is slidably connected to it. The feeding stop is used to push the cardboard box that is fastened on the rectangular rod off the rectangular rod so that the cardboard box falls down.

4. The automatic cardboard box fastening device according to claim 3, characterized in that, A protective cylinder is fixedly installed on one side of the workbench, and the connecting block and the rectangular rod are both located inside the protective cylinder.

5. The automatic cardboard box fastening device according to claim 3, characterized in that, The lifting and bending mechanism includes a support frame, a second lifting cylinder, a support plate, and two lifting seats. The support frame is fixedly installed at the bottom of the workbench, the second lifting cylinder is fixedly installed on the support frame, the support plate is fixedly installed at the top of the output rod of the second lifting cylinder, and the two lifting seats are fixedly installed at the top of the support plate. The two lifting seats pass through two through holes opened at the bottom of the workbench, and the two through holes are connected to the positioning groove.

6. The automatic cardboard box fastening device according to claim 3, characterized in that, The third upright plate is fixedly installed on the top of the workbench, the second tilting cylinder is assembled on one side of the third upright plate, the tilting block is fixedly installed on the output rod of the second tilting cylinder, and the blocking mechanism is used to block the cardboard box when the second end of the cardboard box is inserted into the insertion hole, so that the second end can be inserted into the insertion hole.

7. The automatic cardboard box fastening device according to claim 3, characterized in that, The horizontal bending mechanism includes a second horizontal cylinder and a horizontal pusher plate. The second horizontal cylinder is fixedly installed on the top of the worktable, and the horizontal pusher plate is fixedly installed on one end of the output rod of the second horizontal cylinder.

8. The automatic cardboard box fastening device according to claim 3, characterized in that, The insertion mechanism includes a fourth upright plate, a third tilting cylinder, and a tilting pusher. The fourth upright plate is fixedly installed on the top of the workbench, the third tilting cylinder is assembled on the fourth upright plate, and the tilting pusher is fixedly installed on the bottom end of the output rod of the third tilting cylinder. The insertion mechanism is used to insert the second end of the paper box sheet into the insertion hole.

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