Double-sided printing device for packaging bag

Abstract

The utility model provides a double-sided printing device for a packaging bag, which belongs to the technical field of packaging bag processing and is provided with a box body, a printing machine is fixedly mounted on the box body, and fixed ends of two lifting cylinders A are fixedly mounted on one side of the box body. The movable ends of the lifting air cylinders A extend upwards, a transverse plate is fixedly installed at the ends, and a vertical plate is fixedly installed on the face, away from the printing machine, of the transverse plate. A dovetail sliding block B is vertically and slidably connected to the vertical plate, a supporting box of a hollow structure is fixedly installed on the dovetail sliding block B, a rotating shaft penetrating through the supporting box and rotationally connected with the supporting box is arranged on the supporting box, and a turnover frame capable of driving a packaging bag to turn over is fixedly installed at the position, located over the printing machine, of the front end of the rotating shaft. Pneumatic clamping jaws used for clamping packaging bags are fixedly installed on the two opposite sides in the overturning frame. The packaging bag turnover device is used for solving the technical problem that the turnover packaging bag and the first face of the packaging bag cannot be located at the same position conveniently, and deviation may occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bag processing, and more specifically, relates to a double-sided printing device for packaging bags. Background Art

[0002] A packaging bag refers to a bag used to hold, cover, or wrap items in daily life and commercial activities. In order to increase the value of goods, the value of use, and promote some products or manufacturers, some words or patterns are usually printed on the packaging bag;

[0003] The utility model with the application number: CN202321780175.X (publication number: CN220429451U) discloses a printing and turning device for packaging bags, including a workbench, and further includes a turning mechanism arranged on the workbench for turning the packaging bag; the utility model with the application number: CN202321751365.9 (publication number: CN220220092U) discloses a double-sided printing device, including a box body, a printing machine, a square frame, two round rods, a lifting assembly, a turning assembly, and two clamping units;

[0004] The above patents can all turn over the packaging bag. However, during the turning process, the height and angle of the packaging bag will change. The above patents are not convenient for making the turned-over packaging bag be in the same position as the first side of the packaging bag, resulting in possible offsets in the positions of the two sides of the packaging bag relative to the printing location, affecting the printing accuracy. Summary of the Utility Model

[0005] In view of this, the utility model provides a double-sided printing device for packaging bags, which is used to solve the technical problem that the above patents are not convenient for making the turned-over packaging bag be in the same position as the first side of the packaging bag, resulting in possible offsets in the positions of the two sides of the packaging bag relative to the printing location.

[0006] The utility model is implemented as follows:

[0007] The utility model provides a double-sided printing device for packaging bags, which has a box body, and a printing machine is fixedly installed on the box body. Among them, the fixed ends of two lifting cylinders A are fixedly installed on one side of the box body, the movable ends of the lifting cylinders A extend upward, and a cross plate is fixedly installed at the ends in common. A vertical plate is fixedly installed on the side of the cross plate away from the printing machine;

[0008] A dovetail slider B is vertically slidably connected to the vertical plate. A support box with a hollow structure is fixedly installed on the dovetail slider B. A rotating shaft that penetrates and is rotatably connected to the support box is provided on the support box. At the front end of the rotating shaft and directly above the printing machine, a turning frame capable of driving the packaging bag to turn is fixedly installed. Pneumatic chucks for clamping the packaging bag are fixedly installed on opposite sides inside the turning frame.

[0009] On the basis of the above technical solution, the double-sided printing device for a packaging bag of the present utility model can be further improved as follows:

[0010] Further, one end of an upper connecting rod is fixedly installed at the rear end of the rotating shaft, and the other end of the upper connecting rod is rotatably connected to an upper rotating column;

[0011] One end of a vertically arranged lower connecting rod is fixedly installed on the bottom wall of the support box, and the other end of the lower connecting rod is rotatably connected to a lower rotating column.

[0012] Further, a tension spring is commonly connected between the upper rotating column and the lower rotating column. Left and right limiting rods located on both sides of the rotating shaft are fixedly installed on the support box, and the upper connecting rod is located between the left limiting rod and the right limiting rod.

[0013] Further, two connecting ears are symmetrically fixedly installed at the front end of the rotating shaft, and a left steering rod and a right steering rod are respectively fixedly installed on the connecting ears.

[0014] Further, a U-shaped frame is horizontally slidably connected to the horizontal plate. Left and right baffles are respectively fixedly installed on both sides of the top end of the U-shaped frame. A triangular block is fixedly installed in the middle of the inner bottom wall of the U-shaped frame, and the triangular block includes a left inclined surface and a right inclined surface.

[0015] Further, a driving motor is fixedly installed on the top wall of the vertical plate. The output shaft of the driving motor extends downward, and a lead screw is fixedly installed at the end. The lead screw is threadedly connected to the dovetail slider B.

[0016] Compared with the prior art, the beneficial effects of the double-sided printing device for a packaging bag provided by the present utility model are:

[0017] The setting of the triangular block enables the U-shaped frame to slide under the action of the left steering rod and the right steering rod, so that the turning frame moves to the lowest end every time it moves downward; the settings of the left baffle and the right baffle can limit the upward movement of the right steering rod and the left steering rod. When the turning frame moves to the topmost end, under the action of the structure connected to the tension spring, the packaging bag is turned;

[0018] After the lifting cylinder A completes the adjustment of the height position of the cross plate, the turnover surface of the turnover frame is still located at the same position as when printing on the first side, reducing the adjustment of the height. Moreover, the turnover frame of this device is a 180° turnover frame each time, reducing the adjustment of the angle and improving the printing accuracy. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a side view of a double-sided printing device for packaging bags;

[0021] Figure 2 It is a front view of a double-sided printing device for packaging bags;

[0022] Figure 3 It is a front-side axonometric view of the structure on the cross plate of a double-sided printing device for packaging bags;

[0023] Figure 4 It is a rear-side axonometric view of the structure on the cross plate of a double-sided printing device for packaging bags;

[0024] Figure 5 It is an axonometric view of the pneumatic chuck of a double-sided printing device for packaging bags;

[0025] Figure 6 It is Figure 2 the schematic internal structure diagram of the turnover frame in

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 11. Box body; 12. Printing machine; 21. Lifting cylinder A; 22. Cross plate; 220. Dovetail chute A; 23. Dovetail slider A; 24. U-shaped frame; 25. Left baffle; 26. Right baffle; 27. Triangular block; 28. Left inclined surface; 29. Right inclined surface; 3. Tension spring; 31. Vertical plate; 310. Dovetail chute B; 32. Dovetail slider B; 33. Support box; 34. Rotating shaft; 35. Upper connecting rod; 36. Upper rotating column; 37. Lower connecting rod; 38. Lower rotating column; 391. Left limit rod; 392. Right limit rod; 4. Turnover frame; 41. Pneumatic chuck; 42. Double-headed cylinder; 43. Connecting plate; 44. Clamping plate; 51. Connecting ear; 52. Left steering rod; 53. Right steering rod; 61. Driving motor; 62. Lead screw. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0030] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined. Embodiment 1

[0033] As Figure 1As shown in the figure, the utility model provides a double-sided printing device for packaging bags, which has a box body 11. A printing machine 12 is fixedly installed on the box body 11. Among them, the fixed ends of two lifting cylinders A21 are fixedly installed on one side of the box body 11. The movable ends of the lifting cylinders A21 extend upward, and a cross plate 22 is fixedly installed at the ends together. A vertical plate 31 is fixedly installed on the side of the cross plate 22 away from the printing machine 12.

[0034] A dovetail slider B32 is vertically slidably connected to the vertical plate 31. A support box 33 with a hollow structure is fixedly installed on the dovetail slider B32. A rotating shaft 34 is provided on the support box 33 and is rotatably connected thereto. At the front end of the rotating shaft 34 and directly above the printing machine 12, a turning frame 4 capable of driving the packaging bag to be turned over is fixedly installed. Pneumatic chucks 41 for clamping the packaging bag are fixedly installed on the opposite sides inside the turning frame 4.

[0035] Optionally, in the above technical solution, one end of an upper connecting rod 35 is fixedly installed at the rear end of the rotating shaft 34, and the other end of the upper connecting rod 35 is rotatably connected to an upper rotating column 36.

[0036] One end of a vertically arranged lower connecting rod 37 is fixedly installed on the bottom wall of the support box 33, and the other end of the lower connecting rod 37 is rotatably connected to a lower rotating column 38.

[0037] Optionally, in the above technical solution, a tension spring 3 is commonly connected between the upper rotating column 36 and the lower rotating column 38. Left and right limit rods 391 and 392 are fixedly installed on the support box 33 on both sides of the rotating shaft 34, and the upper connecting rod 35 is located between the left limit rod 391 and the right limit rod 392.

[0038] Optionally, in the above technical solution, two connecting ears 51 are symmetrically fixedly installed at the front end of the rotating shaft 34, and a left steering rod 52 and a right steering rod 53 are respectively fixedly installed on the connecting ears 51.

[0039] Optionally, in the above technical solution, a U-shaped frame 24 is horizontally slidably connected to the cross plate 22. Left and right baffles 25 and 26 are respectively fixedly installed on both sides of the top end of the U-shaped frame 24. A triangular block 27 is fixedly installed in the middle of the inner bottom wall of the U-shaped frame 24. The triangular block 27 includes a left inclined surface 28 and a right inclined surface 29.

[0040] Optionally, in the above technical solution, a driving motor 61 is fixedly installed on the top wall of the vertical plate 31. The output shaft of the driving motor 61 extends downward, and a lead screw 62 is fixedly installed at the end. The lead screw 62 is threadedly connected to the dovetail slider B32.

[0041] Preferably, the lower connecting rod 37 is a triangle with a right angle at the apex angle, and the included angle between the two connecting ears 51 is 120°.

[0042] Specifically, a dovetail chute B310 is formed in the vertical plate 31, a dovetail slider B32 is slidably connected in the dovetail chute B310, and a support box 33 is fixedly installed on the dovetail slider B32; a dovetail chute A220 is formed in the horizontal plate 22, a dovetail slider A23 is slidably connected in the dovetail chute A220, and a U-shaped frame 24 is fixedly installed on the dovetail slider A23.

[0043] Specifically, the pneumatic claw 41 includes a double-headed cylinder 42 fixedly installed on the inner side wall of the turnover frame 4. The output shafts of the double-headed cylinder 42 extend in the vertical direction, and connecting plates 43 are fixedly installed at the ends. A clamping plate 44 is fixedly installed at the end of the connecting plate 43 away from the double-headed cylinder 42. The opposite surfaces of the two clamping plates 44 are in contact with the packaging bag.

[0044] Working principle:

[0045] During use, the packaging bag to be printed is clamped in the turnover frame 4 by the two pneumatic claws 41. At this time, the turnover frame 4 is at the lowest end in the U-shaped frame 24 (that is, the dovetail slider B32 moves to the lowest end, the right steering rod 53 abuts against the right inclined surface 29 of the triangular block 27, the left steering rod 52 is directly above the right steering rod 53, and the upper connecting rod 35 abuts against the left limiting rod 391). The lifting cylinder A21 is started to contract, driving the horizontal plate 22 to move downward, so that the first side of the packaging bag in the turnover frame 4 passes through the printing of the printing machine 12;

[0046] The driving motor 61 is started to drive the lead screw 62 to rotate forward, driving the support box 33 to move upward. The left steering rod 52 first abuts against the right baffle 26. The support box 33 continues to move upward, causing the rotating shaft 34 to rotate clockwise. First, it rotates to a position where the left steering rod 52 and the right steering rod 53 are on the same horizontal plane. When the dovetail slider B32 moves to the highest end, the left steering rod 52 and the right steering rod 53 are on the same vertical plane (that is, between the left baffle 25 and the right baffle 26, and the left steering rod 52 is directly below the right steering rod 53). At this time, the turnover frame 4 is flipped by 180° (one rotation of the rotating shaft 34 causes the upper connecting rod 35 to rotate from the top surface of the left limiting rod 391 to the top surface of the right limiting rod 392. During the rotation of the upper connecting rod 35, the tension spring 3 is stretched. When the upper connecting rod 35 abuts against the left limiting rod 391 or the right limiting rod 392, the tension spring 3 tightens the upper rotating column 36 and the lower rotating column 38 to prevent the rotating shaft 34 from rotating).

[0047] Start the drive motor 61 to drive the lead screw 62 to reverse and drive the support box 33 to move downward. When the left steering rod 52 moves to abut against the left inclined surface 28 of the triangular block 27, the U-shaped frame 24 moves to the right until the movable end of the drive motor 61 is in a fully extended state. At this time, the packaging bag on the flipping frame 4 is flipped to the same position as its first side, thus completing the double-sided printing of one packaging bag. The printing positions on both sides are the same, and there is no need to adjust the lifting cylinder A21 again, avoiding the offset of the two sides of the packaging bag relative to the printing machine 12 during printing.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-sided printing device for packaging bags, comprising a box (11), on which a printing machine (12) is fixedly mounted, characterized in that: The fixed ends of two lifting cylinders A (21) are fixedly mounted on one side of the box body (11); the movable ends of the lifting cylinders A (21) extend upward and a horizontal plate (22) is fixedly mounted on the ends thereof; a vertical plate (31) is fixedly mounted on a side of the horizontal plate (22) away from the printing machine (12); A dovetail slider B (32) is vertically slidably connected to the vertical plate (31), a hollow support box (33) is fixedly mounted on the dovetail slider B (32), a rotating shaft (34) passing through the support box (33) and rotatably connected thereto is provided, a turning frame (4) capable of driving the packaging bag to turn over is fixedly mounted at the front end of the rotating shaft (34) and located directly above the printing machine (12), and pneumatic clamping claws (41) for clamping the packaging bag are fixedly mounted on opposite sides of the turning frame (4).

2. A double-sided printing device for packaging bags according to claim 1, characterized in that: One end of an upper connecting rod (35) is fixedly mounted on the rear end of the rotating shaft (34), and the other end of the upper connecting rod (35) is rotatably connected to an upper rotating column (36); One end of a vertically arranged lower connecting rod (37) is fixedly mounted on the bottom wall of the supporting box (33), and the other end of the lower connecting rod (37) is rotatably connected to a lower rotating column (38).

3. A double-sided printing device for packaging bags according to claim 2, characterized in that: A tension spring (3) is commonly connected between the upper rotating column (36) and the lower rotating column (38); a left limit rod (391) and a right limit rod (392) located on both sides of the rotating shaft (34) are fixedly installed on the support box (33); and the upper connecting rod (35) is located between the left limit rod (391) and the right limit rod (392).

4. A double-sided printing device for packaging bags according to claim 3, characterized in that: Two connecting ears (51) are symmetrically fixedly mounted on the front end of the rotating shaft (34), and a left steering rod (52) and a right steering rod (53) are respectively fixedly mounted on the connecting ears (51).

5. The double-sided printing device for packaging bags according to claim 1, characterized in that: A U-shaped frame (24) is slidably connected to the transverse plate (22), a left baffle (25) and a right baffle (26) are fixedly mounted on both sides of the top of the U-shaped frame (24), and a triangular block (27) is fixedly mounted on the middle of the inner bottom wall of the U-shaped frame (24), and the triangular block (27) includes a left inclined surface (28) and a right inclined surface (29).

6. The double-sided printing device for packaging bags according to claim 1, characterized in that: A driving motor (61) is fixedly mounted on the top wall of the vertical plate (31); an output shaft of the driving motor (61) extends downward and a screw rod (62) is fixedly mounted on the end thereof; the screw rod (62) is threadedly connected to the dovetail slider B (32).

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