Bottom card positioning device and bottom card placing device for paper bag machine

Abstract

The present invention discloses a bottom card positioning device for a paper bag machine, including a paper bag conveying mechanism and a bottom card positioning mechanism, wherein the paper bag conveying mechanism forms a conveying line for conveying semi-finished paper bags, and is characterized in that the bottom card positioning mechanism includes a left positioning plate and a right positioning plate that cooperate with each other to position the bottom card left and right, wherein the left positioning plate is movably arranged on a left vertical plate, and the right positioning plate is movably arranged on a right vertical plate, wherein the left positioning plate and the right positioning plate are relatively arranged above the conveying line, and the left vertical plate and the right vertical plate are driven by a driving mechanism to move relative to each other. Before the bottom card positioning mechanism, the bottom of the paper bag needs to be opened, and then the bottom card is placed in the bottom of the paper bag, and then the bottom of the opened paper bag is flattened by a pressure roller, and finally the bottom card is centrally positioned to avoid the bottom card from producing a large amount of waste due to positional displacement.

Description

Technical Field

[0001] The invention relates to the field of bag making, in particular to a bottom card positioning device and a bottom card placing device of a paper bag machine. Background Art

[0002] Paper bags are widely used due to their low production cost, low environmental pollution, and convenience. Paper bags in the bag-making line need to be opened, bottom-carded, and bottom-glued. In the prior art, after the bottom card is placed in the opened bag bottom, it will be immediately sent to the bottom gluing process. Therefore, during the process of placing the bottom card or conveying the paper bag, the bottom card will inevitably shift in position, resulting in the final finished paper bag being a defective product, which increases the production cost. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a bottom card positioning device and a bottom card placing device for a paper bag machine, which can position the bottom card and avoid producing a large amount of waste due to position deviation of the bottom card.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a bottom card positioning device of a paper bag machine comprises a paper bag conveying mechanism and a bottom card positioning mechanism, the paper bag conveying mechanism forms a conveying line for conveying semi-finished paper bags, and is characterized in that the bottom card positioning mechanism comprises a left positioning plate and a right positioning plate which cooperate with each other to perform left and right positioning of the bottom card, the left positioning plate is movably arranged on the left vertical plate, the right positioning plate is movably arranged on the right vertical plate, the left positioning plate and the right positioning plate are relatively arranged above the conveying line, and the left vertical plate and the right vertical plate are driven by a driving mechanism to move relative to each other.

[0005] The driving mechanism comprises a left cylinder and a right cylinder, the telescopic shaft of the left cylinder is connected to the left vertical plate, and the telescopic shaft of the right cylinder is connected to the right vertical plate.

[0006] The left cylinder and the right cylinder are installed on the suspension beam bracket.

[0007] The left positioning plate is provided with a left swing arm, and the left swing arm swings up and down around a fulcrum on the left vertical plate. The right positioning plate is provided with a right swing arm, and the right swing arm swings up and down around a fulcrum on the right vertical plate.

[0008] The left vertical plate is provided with a guide rail A for the left positioning plate to move, and the right vertical plate is provided with a guide rail B for the right positioning plate to move.

[0009] The left positioning plate and the right positioning plate are both provided with two rows of vertical slide grooves, and connecting pins are provided in the vertical slide grooves.

[0010] The bag facing sides of the left positioning plate and the right positioning plate are arc-shaped edges.

[0011] The bottom card placing device of the paper bag machine is characterized in that it includes a bottom card sorting mechanism, a bottom card conveying mechanism and the bottom card positioning device, the bottom card conveying mechanism and the bottom card positioning mechanism are arranged on the conveyor line in sequence, the bottom card sorting mechanism includes a bottom card stacking bin, a paper separating knife, a bottom card pressure plate and a card separating belt, the paper separating knife is arranged at the front side of the bottom card stacking bin, and there is a gap between the paper separating knife and the card separating belt for only one bottom card to be output, the bottom card pressure plate and the card separating belt cooperate with each other to convey the bottom card up and down; the bottom card conveying mechanism includes an upper belt and a lower belt, the bottom card output end of the card separating belt is connected with the bottom card input end of the upper belt and the lower belt, and the upper belt and the lower belt cooperate with each other to convey the bottom card to the conveyor line.

[0012] The bottom card placing device of the paper bag machine is characterized in that it includes a bottom card lowering mechanism, a bag opening mechanism and the bottom card positioning device, the bottom card lowering mechanism and the bottom card positioning mechanism are sequentially arranged on the conveyor line, the bag opening mechanism is located below the bottom card lowering mechanism, the bottom card lowering mechanism includes a motor, a rotating shaft driven by the motor, a card placing cylinder and a bottom card suction nozzle, the card placing cylinder is provided with two and the tails are connected, the two card placing cylinders are connected to the rotating shaft with the rotating shaft as the central axis, the front end of the piston rod of the card placing cylinder is connected to a mounting plate, and the bottom card suction nozzle is arranged on the mounting plate.

[0013] The bag opening mechanism includes a seat body, a suction cup, a rotating shaft, a suction cup frame and a transmission gear. The suction cup frame is rotatably arranged on the seat body through the rotating shaft. The rotating shaft is arranged parallel to the conveyor line. The suction cup is installed on the suction cup frame. The suction cup frame is provided with a matching gear meshing with the transmission gear. The transmission gear is driven to rotate back and forth by a power source, and the rotation of the transmission gear drives the suction cup frame to rotate along the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a bottom card positioning device in which the left and right positioning plates move vertically up and down;

[0015] Figure 2 It is a structural schematic diagram of the bottom card positioning device of the left and right positioning plates that can move up and down in other ways;

[0016] Figure 3 This is a schematic diagram of the bottom card positioning;

[0017] Figure 4 It is a structural schematic diagram of the bottom card placing device of the first embodiment;

[0018] Figure 5 It is a structural schematic diagram of the bottom card placing device of the second embodiment.

[0019] In the figure, 100, semi-finished paper bag, 200, bottom card;

[0020] 10. Paper bag conveying mechanism;

[0021] 20. Bottom card positioning mechanism, 21. Left positioning plate, 211. Left cylinder, 22. Right positioning plate, 221. Right cylinder, 23. Left vertical plate, 24. Right vertical plate, 25. Cantilever beam bracket, 26. Left swing arm, 27. Fulcrum, 28. Guide rail A, 29. Vertical slide, 291. Bag facing side;

[0022] 30. Bottom card separating mechanism, 31. Bottom card stacking bin, 32. Paper separating knife, 33. Bottom card pressing plate, 34. Card separating belt;

[0023] 40. Bottom card conveying mechanism, 41. upper belt, 42. lower belt;

[0024] 50. Bottom card lowering mechanism, 51. Motor, 52. Rotating shaft, 53. Card releasing cylinder, 54. Bottom card suction nozzle, 55. Mounting plate;

[0025] 60. bag opening mechanism, 61. seat body, 62. suction cup, 63. rotating shaft, 64. suction cup frame, 65. transmission gear, 66. matching gear. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, the bottom card positioning device of the paper bag machine includes a paper bag conveying mechanism 10 and a bottom card positioning mechanism 20. The paper bag conveying mechanism 10 forms a conveying line for conveying semi-finished paper bags 100. The conveying line can be a conveying belt or a conveying roller or other methods. The bottom card positioning mechanism 20 includes a left positioning plate 21 and a right positioning plate 22. The left positioning plate 21 and the right positioning plate 22 cooperate with each other to position the bottom card 200 left and right. The left positioning plate 21 is movable up and down on the left vertical plate 23, and the right positioning plate 22 is movable up and down on the right vertical plate 24. The left positioning plate 21 and the right positioning plate 22 are relatively arranged above the conveying line. The left and right positioning plates can move up and down vertically, or obliquely up and down, or in other ways, as long as they move up and down relative to the conveying line. The left vertical plate 23 and the right vertical plate 24 are driven by the driving mechanism to move relative to each other, thereby driving the left positioning plate 21 and the right positioning plate 22 to move relative to each other to position the bottom card 200 in the center.

[0027] In this embodiment, the driving mechanism includes a left cylinder 211 and left and right cylinders 221, the telescopic shaft of the left cylinder 211 is connected to the left vertical plate 23, the telescopic shaft of the left and right cylinders 221 is connected to the right vertical plate 24, and the left cylinder 211 and the left and right cylinders 221 are installed on the suspension beam bracket 25. The left and right cylinders drive the left and right vertical plates, and then drive the left and right positioning plates to move relative to each other.

[0028] Implementation method of vertical up and down movement of left positioning plate and right positioning plate: two rows of vertical slide grooves 29 are provided on the left positioning plate 21 and the right positioning plate 22, and connecting pins are provided in the vertical slide grooves. The connecting pins can move up and down in the vertical slide grooves, that is to say, the left positioning plate and the right positioning plate can move freely up and down.

[0029] like Figure 2 As shown, other embodiments of the left and right positioning plates moving up and down are as follows: the left positioning plate 21 is provided with a left swing arm 26, and the left swing arm 26 swings freely up and down around the fulcrum 27 on the left vertical plate. Similarly, the right positioning plate is provided with a right swing arm, and the right swing arm swings freely up and down around the fulcrum on the right vertical plate. In order to limit the floating of the swing of the left and right swing arms, the left vertical plate 23 is provided with a guide rail A 28 for the movement of the left positioning plate 21, and the right vertical plate is provided with a guide rail B for the movement of the right positioning plate. The setting of the guide rail A and the guide rail B contributes to the stability of the movement of the left and right positioning plates. The left swing arm 26 is located on the pocket side 291 of the left positioning plate 21, and the right swing arm is located on the pocket side of the right positioning plate, so that the center of gravity of the left and right positioning plates can move toward the pocket side.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the bag-facing side 291 of the left positioning plate 21 and the right positioning plate 22 is an arc-shaped edge, and the bag-facing side 291 is the side that faces the paper bag. The arc-shaped edge is to allow the paper bag to smoothly enter under the right positioning plate to prevent the left and right positioning plates from blocking or jamming the paperboard. In addition, the left and right positioning plates can press the paper bag, but will not press the bottom card.

[0031] After the bottom of the paper bag is opened and the bottom card is placed, it reaches the bottom card positioning device. Since the flat-folded paper bag has a certain thickness, when the paper bag passes under the left and right positioning plates, the left and right positioning plates move up and down according to the thickness of the paper bag. When the paper bag is transported to the position where the bottom card is located between the left positioning plate and the right positioning plate, the left cylinder drives the left positioning plate, and the right cylinder drives the right positioning plate. The left and right positioning plates move relative to each other to push the bottom card so that the bottom card is centered. After completion, the left and right positioning plates move toward each other to reset and wait for the next paper bag.

[0032] Before the bottom card positioning mechanism, the bottom of the paper bag needs to be opened, and then the bottom card is placed in the bottom of the paper bag, and then the bottom of the opened paper bag is flattened by a pressing roller, and finally the bottom card is centered. In the present invention, the bottom card placement device of the paper bag machine lists the following two methods.

[0033] Embodiment 1: Figure 4As shown, the bottom card placing device of the paper bag machine includes a bottom card separating mechanism 30, a bottom card conveying mechanism 40 and the bottom card positioning device. The bottom card conveying mechanism 40 and the bottom card positioning mechanism 20 are sequentially arranged on the conveying line. The bottom card separating mechanism 30 includes a bottom card stacking bin 31, a paper separating knife 32, a bottom card pressing plate 33 and a card separating belt 34. The paper separating knife 32 is arranged at the front side of the bottom card stacking bin 31. There is a space between the paper separating knife 32 and the card separating belt 34 for outputting only one bottom card. The gap between the card dividing belt and the bottom card can be driven by the card dividing belt to be sent out from the gap, and the bottom card pressing plate 33 and the card dividing belt 34 cooperate with each other to transport the bottom card, and send the bottom card to the bottom card conveying mechanism; the bottom card conveying mechanism 40 includes an upper belt 41 and a lower belt 42, and the bottom card output end of the card dividing belt 34 is connected to the bottom card input end of the upper belt 41 and the lower belt 42, and the upper belt 41 and the lower belt 42 cooperate with each other to transport the bottom card to the conveyor line.

[0034] Working principle: The semi-finished paper bag with the bottom opened is conveyed by the conveyor line to the junction of the bottom card and the paper bag. The card-separating belt transmission separates the bottom card and conveys it to the bottom card input end of the upper belt and the lower belt through the card-separating belt. The upper belt and the lower belt of the bottom card conveying mechanism take the bottom card from the bottom card output end of the card-separating belt, and then convey the bottom card to the junction of the bottom card and the paper bag, thereby completing the bottom card placement work, and then the left and right positioning plates of the bottom card positioning mechanism are used to position the bottom card left and right, and finally it is sent to the bottom pasting.

[0035] Embodiment 2: Figure 5 As shown, the bottom card placing device of the paper bag machine includes a bottom card placing mechanism 50, a bag opening mechanism 60 and the bottom card positioning device. The bottom card placing mechanism 50 and the bottom card positioning mechanism 20 are sequentially arranged on the conveyor line. The conveyor line can be in the form of a conveyor belt, a conveyor roller or other methods. The bag opening mechanism 60 is located below the bottom card placing mechanism 50. The bag opening mechanism 60 is used to open the bag mouth of the conveyed paper bag. The bottom card placing mechanism 50 is used to suck out the bottom card in the bottom card bin and place it into the opened bag mouth, thereby completing the bottom card placing work.

[0036] The bag opening mechanism 60 includes a seat 61, a suction cup 62, a rotating shaft 63, a suction cup frame 64 and a transmission gear 65. The suction cup 64 is rotatably arranged on the seat 61 via the rotating shaft 63. The rotating shaft 63 is arranged parallel to the conveyor line. The suction cup 62 is mounted on the suction cup frame 64. The suction cup frame 64 is provided with a matching gear 66 meshing with the transmission gear. The transmission gear is driven to rotate back and forth by a power source. The rotation of the transmission gear 65 drives the suction cup frame 64 to rotate along the rotating shaft 63. When the suction cup frame is in a horizontal state, the suction cup sucks the folded edge of the bottom of the paper bag vertically downward. During the rotation of the suction cup frame, the suction cup sucks the folded edge of the bottom of the paper bag and opens to both sides until the suction cup is horizontal and the bottom of the paper bag is completely opened.

[0037] The bottom card lowering mechanism 50 includes a motor 51, a rotating shaft 52 driven by the motor, a card releasing cylinder 53 and a bottom card suction nozzle 54. The card releasing cylinders 53 are provided with two and are connected at the tail ends. The two card releasing cylinders 53 are connected to the rotating shaft 52 with the rotating shaft 52 as the central axis. The front end of the piston rod of the card releasing cylinder 53 is connected to a mounting plate 55, and the bottom card suction nozzle 54 is arranged on the mounting plate 55.

[0038] After the bottom opening of the paper bag is opened, the suction nozzle located at the top moves up through the piston rod of the card release cylinder to suck the bottom card in the bottom card bin, and the piston rod retracts. The motor drives the card release cylinder to rotate 180 degrees around the rotation axis, so that the upper and lower suction nozzles swap positions, so that the suction nozzle sucking the bottom card faces the bottom opening of the paper bag, and the piston rod of the card release cylinder moves down to put the bottom card down into the bottom opening of the paper bag; at the same time, the suction nozzle located at the top sucks the next bottom card, waiting for the upper and lower suction nozzles to swap positions.

[0039] After the bottom card is placed in the bottom of the paper bag, the bottom of the paper bag is flattened by the pressing roller. After flattening, in order to prevent the position of the bottom card from shifting, the bottom card is centered by the bottom card positioning device to ensure smooth bottom sealing.

Claims

1. A bottom card positioning device for a paper bag machine, comprising a paper bag conveying mechanism and a bottom card positioning mechanism, wherein the paper bag conveying mechanism forms a conveying line for conveying semi-finished paper bags, and is characterized in that: The bottom card positioning mechanism includes a left positioning plate and a right positioning plate which cooperate with each other to perform left and right positioning of the bottom card, the left positioning plate is movably arranged on the left vertical plate, the right positioning plate is movably arranged on the right vertical plate, the left positioning plate and the right positioning plate are relatively arranged above the conveyor line, the left vertical plate and the right vertical plate are driven by a driving mechanism to move relative to each other, the left positioning plate is provided with a left swing arm, the left swing arm swings up and down around a fulcrum on the left vertical plate, the right positioning plate is provided with a right swing arm, the right swing arm swings up and down around a fulcrum on the right vertical plate, the left vertical plate is provided with a guide rail A for the movement of the left positioning plate, the right vertical plate is provided with a guide rail B for the movement of the right positioning plate, the bag-facing sides of the left positioning plate and the right positioning plate are arc-shaped edges.

2. The bottom card positioning device of the paper bag machine according to claim 1, characterized in that: The driving mechanism comprises a left cylinder and a right cylinder, the telescopic shaft of the left cylinder is connected to the left vertical plate, and the telescopic shaft of the right cylinder is connected to the right vertical plate.

3. The bottom card positioning device of the paper bag machine according to claim 2, characterized in that: The left cylinder and the right cylinder are installed on the suspension beam bracket.

4. The bottom card placing device of the paper bag machine is characterized by: It includes a bottom card sorting mechanism, a bottom card conveying mechanism and the bottom card positioning device according to any one of claims 1-3, the bottom card conveying mechanism and the bottom card positioning mechanism are arranged on the conveyor line in sequence, the bottom card sorting mechanism includes a bottom card stacking bin, a paper separating knife, a bottom card pressure plate and a card separating belt, the paper separating knife is arranged at the front side of the bottom card stacking bin, there is a gap between the paper separating knife and the card separating belt for only one bottom card to be output, the bottom card pressure plate and the card separating belt cooperate with each other to convey the bottom card; the bottom card conveying mechanism includes an upper belt and a lower belt, the bottom card output end of the card separating belt is connected to the bottom card input end of the upper belt and the lower belt, the upper belt and the lower belt cooperate with each other to convey the bottom card to the conveyor line.

5. The bottom card placing device of the paper bag machine is characterized by: It includes a bottom card lowering mechanism, a bag opening mechanism and the bottom card positioning device according to any one of claims 1 to 3, wherein the bottom card lowering mechanism and the bottom card positioning mechanism are sequentially arranged on the conveyor line, and the bag opening mechanism is located below the bottom card lowering mechanism, and the bottom card lowering mechanism includes a motor, a rotating shaft driven by the motor, a card releasing cylinder and a bottom card suction nozzle, wherein two card releasing cylinders are provided and connected at the tail ends, and the two card releasing cylinders are connected to the rotating shaft with the rotating shaft as the central axis, and the front end of the piston rod of the card releasing cylinder is connected to a mounting plate, and the bottom card suction nozzle is arranged on the mounting plate.

6. The bottom card placing device of the paper bag machine according to claim 5, characterized in that: The bag opening mechanism includes a seat body, a suction cup, a rotating shaft, a suction cup frame and a transmission gear. The suction cup frame is rotatably arranged on the seat body through the rotating shaft. The rotating shaft is arranged parallel to the conveyor line. The suction cup is installed on the suction cup frame. The suction cup frame is provided with a matching gear meshing with the transmission gear. The transmission gear is driven to rotate back and forth by a power source, and the rotation of the transmission gear drives the suction cup frame to rotate along the rotating shaft.

Images