A curved surface offset printing machine cup breaking detection and separation device

Abstract

This utility model relates to the field of paper cup detection technology, specifically to a broken cup detection and separation device for a curved offset printing machine. It includes a column with a mounting platform fixed to its top, and a fixed gear fixedly mounted on the column; a rotating frame rotatably mounted on the column in the middle, with four sets of protruding arms extending evenly from its periphery; each set of protruding arms has a rotating shaft rotatably mounted at its end; multiple sets of rotating shafts are fixedly mounted with movable gears, which mesh with the fixed gears. The movable gears revolve around the fixed gears once and simultaneously rotate on their own axis, enabling rapid positioning of batch paper cup detection points; cup holders with a corresponding set mounted on the top of each set of rotating shafts for the paper cups; and four sets of cup wall pressure applicators, respectively installed at the four corners of the mounting platform, for applying pressure to the cup walls of the paper cups on the four sets of cup holders for detection.

Description

Technical Field

[0001] This utility model relates to the field of paper cup detection technology, specifically to a broken cup detection and separation device for a curved offset printing machine. Background Technology

[0002] During the offset printing process on curved surfaces, paper cups may crack, break, or suffer structural damage due to excessive printing pressure, insufficient material toughness, or equipment precision issues. Inspection must be conducted on the production line after printing and before packaging to prevent damaged products from entering the market. Inspection methods include contact testing of the paper cup sidewall hardness. Specifically, standard pressure is applied to the paper cup sidewall, and the degree of deformation or pressure feedback value is measured. This value is then compared with the acceptable standard to determine if the hardness meets the requirement. Damaged or defective paper cups will have reduced sidewall hardness, exhibiting greater deformation under pressure or abnormal pressure sensor readings. Subsequent testing results allow for the separation of defective from acceptable products.

[0003] During testing, the pressure head needs to be perpendicular to the paper cup wall, and the testing point should be 20mm away from the cup. After testing one point, rotate the paper cup 90° (or move the pressure head to the next point) and repeat the above steps. Take the average value as the final result.

[0004] The broken cup detection and separation device designed in this scheme is used for multi-point positioning and detection of batch paper cups. Utility Model Content

[0005] (I) Technical Issues

[0006] This invention aims to solve at least the problem of rapid detection and positioning of detection points in the hardness testing of multiple sets of paper cup sidewalls.

[0007] (II) Technical Content

[0008] This solution provides a broken cup detection and separation device for a curved offset printing machine, achieved through the following specific technical means: including...

[0009] A column, with a mounting platform fixed at the top, and a fixing gear also fixedly fitted on the column;

[0010] The rotating frame is rotatably mounted on the column, and four sets of rotating shafts are rotatably installed around the circumference of the rotating frame. Each set of rotating shafts is fixedly fitted with a movable gear that meshes with a fixed gear. The movable gear revolves around the fixed gear once and also rotates on its own axis once.

[0011] The cup holder, fixed to the top of the swivel, is used to hold a set of paper cups;

[0012] There are also four sets of cup wall pressure devices, which are installed at the four corners of the mounting platform to apply pressure to the cup walls of the paper cups that have been moved to the four-sided inspection stations formed by the side of the mounting platform.

[0013] Preferred technical solution 1: A set of cup wall pressurers is installed on a corresponding set of supports on the mounting platform; a pressure sensor is provided on the pressure head at the top of the cup wall pressurer.

[0014] Preferred technical solution 2: The cup wall pressure device is hinged to the support, so that the up and down tilt angle of the pressure head of the cup wall pressure device can be adjusted to match the tilt angle of the cup wall of the paper cup.

[0015] Preferred technical solution 3: The mounting height of the support on the mounting platform is adjustable, thereby enabling point detection of paper cups at different heights.

[0016] Preferred technical solution four: A push rod two is fixedly installed on the mounting platform, and four sets of lower pressure plates are fixed at the top of the telescopic end of the push rod two. Each set of lower pressure plates is located directly above a set of detection stations. The extension and contraction of the push rod two drives the lower pressure plates to press down, which, together with the cup holder, completes the upper and lower clamping and fixing of the paper cup.

[0017] Preferred technical solution five: It also includes a power box, the bottom end of the vertical shaft is fixed on the power box, and a set of motors is installed and fixed inside the power box. At the same time, the shaft end of the motor extends from the top wall of the power box, and the driving gear fixed on the motor shaft end meshes with the driven gear fixedly sleeved on the rotating frame.

[0018] (III) Technical Effects

[0019] The above structure gives this solution the following advantages:

[0020] 1. Enable batch testing of the hardness of paper cup sidewalls;

[0021] 2. The system utilizes gear transmission to enable multiple cup holders to rotate between multiple inspection stations. Each time the cup moves to the next inspection station, it completes a 90° rotation, thus enabling rapid positioning of the inspection point.

[0022] 3. The detection height and tilt angle of the cup wall pressure device are adapted to the height of the paper cup and the tilt angle of the cup wall. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0025] Figure 2 This is a state diagram for the use of this solution;

[0026] Figure 3 This is an exploded view of the plan;

[0027] Figure 4 This is a side view of the proposed solution.

[0028] Among them, 1. Column, 2. Mounting platform, 21. Vertical cylinder, 3. Annular seat one, 4. Annular seat two, 5. Upright pole, 51. Horizontal track, 52. Cylindrical block, 6. Fixed gear, 7. Rotating frame, 71. Protruding arm, 72. Rotating shaft, 73. Movable gear, 8. Cup holder, 9. Cup wall pressure device, 91. Push rod one, 92. Pressure head, 10. Support, 11. Push rod two, 12. Lower pressure plate, 13. Power box, 14. Annular enclosure, 15. Driven gear, 16. Driving gear. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 2-4 A broken cup detection and separation device for a curved offset printing machine includes a column 1, a rotating frame 7, a cup holder 8, and a cup wall pressure device 9, wherein:

[0031] A mounting platform 2 is fixed at the top of the column 1, and a fixed gear 6 is also fixedly fitted on the column 1. The rotating frame 7 is rotatably fitted on the column 1 in the middle, and four sets of protruding arms 71 extend evenly from the circumference of the rotating frame 7. The end of each set of protruding arms 71 extends to the outside of the mounting platform 2, and a rotating shaft 72 is rotatably installed at the end. Movable gears 73 are fixedly fitted on multiple sets of rotating shafts 72. A cup holder 8 is installed with a corresponding set at the top of each set of rotating shafts 72 for placing a set of paper cups. The multiple sets of movable gears 73 have the same specifications as the fixed gear 6 and surround the fixed gear 6 and mesh with the fixed gear 6. Since the movable gears 73 have the same specifications as the fixed gear 6, they can rotate once on their own axis while revolving around the fixed gear 6.

[0032] There are four sets of cup wall pressurers 9, which are installed at the four corners of the mounting platform 2 respectively. They are used to pressurize and test the cup walls of the paper cups on the four sets of cup holders 8 (the position on the side of the mounting platform 2 facing the cup wall pressurers 9 is the test station, and the paper cups are carried by the cup holders 8 through the four test stations in sequence). After a set of paper cups is carried by the movable gear 73 through the four sets of cup wall pressurers 9 in sequence, multi-point detection of the paper cup at 90° intervals in the circumference is realized, and the paper cup is fed back as qualified or not based on the test data.

[0033] In one set of embodiments

[0034] Please see Figure 2 , Figure 3 , Figure 4 On the mounting platform 2, a set of supports 10 is installed at the position corresponding to each set of cup wall pressurers 9, and a set of cup wall pressurers 9 is installed on the corresponding set of supports 10.

[0035] The cup wall pressure applicator 9 includes a push rod 91 mounted on the support 10 and a pressure head 92 fixed to the telescopic end of the push rod 91. A groove or through hole is opened at the center of the top of the pressure head 92 to embed a pressure sensor (such as an existing strain gauge sensor or piezoelectric sensor). The sensing surface of the sensor is flush with or slightly lower than the force-bearing surface of the pressure head 92 to ensure that the pressure can be directly transmitted to the sensor. At the same time, the telescopic direction of the push rod 91 is perpendicular to the contact side of the pressure head 92 with the cup wall to ensure that the pressure is fully applied in the normal direction of the side wall and maintain the reliability of the detection results.

[0036] To adapt to different heights and cup wall tilt angles:

[0037] The front middle part of the outer shell of push rod 91 is hinged to support 10. The up and down tilt angle of push rod 91 can be adjusted by the hinged connection to adapt to the tilt angle of the paper cup wall.

[0038] A vertical cylinder 21 is fixed around the center of the mounting platform 2, and an annular seat 3 and an annular seat 4 are sleeved on the vertical cylinder 21, with the annular seat 4 located above the annular seat 3. The height of the annular seat 3 and the annular seat 4 on the sleeve can be adjusted (e.g., the annular seat 3 and the annular seat 4 are fixed to the vertical cylinder 21 with bolts, and the height of the annular seat 3 and the annular seat 4 can be adjusted by changing the position of the bolts). Four sets of supports 10 are fixedly installed on the lower annular seat 3. The tail end of the push rod 91 extends to the top of the annular seat 4. Vertical rods 5 are fixed at the four corners of the tail ends of the four sets of push rods 91 around the annular seat 4, and a transverse track 51 is formed at the top of the vertical rod 5. The transverse track 51 is radial along the annular seat 4, and the tail end of the push rod 91 is fixedly connected to the cylindrical block 52 that slides in the transverse track 51.

[0039] By adjusting the height of the second ring seat 4 relative to the first ring seat 3, the vertical tilt angle of the push rod 91 can be controlled. At the same time, by simultaneously adjusting the height of the first ring seat 3 and the second ring seat 4 on the vertical cylinder 21, the height of the contact point between the pressure head 92 and the paper cup can be adjusted, thereby adapting to the fixed-point detection of paper cups with different tilt angles, different cup wall inclinations, and different heights.

[0040] In one set of embodiments

[0041] Please see Figures 1-4 The column 1 is a hollow cylindrical structure, and the hollow cylinder passes through the center of the mounting platform 2;

[0042] To prevent the paper cup from moving during testing: a push rod 2 11 is installed and fixed in the central cavity of the column 1, and the top telescopic end of the push rod 2 11 extends from the central hole of the mounting platform 2 and extends to the top of the mounting platform 2. Four sets of lower pressure plates 12 are also fixed at the top of the telescopic end of the push rod 2 11, and each set of lower pressure plates 12 is located directly above a set of testing stations.

[0043] When the cup holder 8 moves to the bottom pressure plate 12, the extension and retraction of the push rod 11 drives the bottom pressure plate 12 to press down, thereby pressing it onto the top of the paper cup. This, together with the cup holder 8, completes the clamping and fixing of the paper cup (the retraction amount of the push rod 11 is preset according to the height of the paper cup), which facilitates subsequent testing.

[0044] During the specific testing process, the height of the paper cup, the diameter of the paper cup, the slope of the paper cup wall, the tilt angle of push rod 91, the overall height of push rod 91, and the shrinkage amount of push rod 11 are preset in advance. It is worth noting that the specific models of push rod 91 and push rod 11 mentioned in this embodiment, as well as their matching power supply and control switch, can also be provided by the manufacturer. The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon.

[0045] When picking up and placing paper cups, the cup holder 8 moves to a state of misalignment with the lower pressure plate 12. At this time, the paper cup picking robot can place the 4 sets of paper cups into the 4 sets of cup holders 8 respectively.

[0046] Then, the rotating frame 7 rotates intermittently on the column 1, driving the four cup holders 8 to move to the surrounding inspection stations. When the cup holders 8 are in the inspection station, the rotating frame 7 stops. Then, the push rod 11 is activated to retract, driving the lower pressure plate 12 to press down and clamp the paper cup. Then, the push rod 11 is activated to extend, using the pressure head 92 to move outward and contact the cup wall. When pressure is applied, the pressure data detected by the pressure sensor provides feedback on the hardness of the paper cup wall.

[0047] In one set of embodiments

[0048] Please see Figure 1 , Figure 2 It also includes a power box 13, the bottom end of the vertical shaft is fixed on the power box 13, and a set of motors is installed and fixed inside the power box 13. At the same time, the shaft end of the motor extends from the top wall of the power box 13. The driving gear 16 fixed on the motor shaft end meshes with the driven gear 15 fixedly sleeved on the rotating frame 7. The rotation of the rotating frame 7 is realized by the gear transmission driven by the motor, and the motor is controlled to drive the rotating frame 7 to rotate intermittently by 90°.

[0049] The power box 13 is electrically connected to the motor, push rod 91, push rod 11 and pressure sensor through a controller using existing technology, and controls their working status.

[0050] In one set of embodiments

[0051] Please see Figure 1 An annular enclosure 14 is fixed on the top of the power box 13. The column 1, rotating frame 7, and movable gear 73 are all located inside the annular enclosure 14 to protect the above structures. The cup holder 8 is located at the top of the enclosure to avoid affecting the operation of the cup holder 8.

[0052] During use, this solution requires daily maintenance of each component according to the established maintenance plan to ensure its working condition.

[0053] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0054] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A broken cup detection and separation device for a curved offset printing machine, characterized in that: include A column (1) is provided with a mounting platform (2) fixed at the top of the column (1), and a fixed gear (6) is also fixedly fitted on the column (1). The rotating frame (7) is rotatably mounted on the column (1) in the middle and four sets of protruding arms (71) extend evenly from the periphery of the rotating frame (7). Each set of protruding arms (71) is rotatably mounted with a rotating shaft (72) at the end. Multiple sets of rotating shafts (72) are fixedly mounted with movable gears (73) of the same specifications as the fixed gear (6). Multiple sets of movable gears (73) are located around the fixed gear (6) and mesh with the fixed gear (6). The cup holder (8) has a corresponding set installed at the top of each set of rotating shafts (72) for placing paper cups; There are four sets of cup wall pressurers (9), which are respectively installed at the four corners of the mounting platform (2). The position of the mounting platform (2) facing the cup wall pressurers (9) serves as the detection station. The paper cup is carried by the cup holder (8) and passes through the four detection stations in sequence. The paper cup passes through the four detection stations to achieve multi-point detection of the paper cup at 90° intervals around the circumference.

2. The broken cup detection and separation device for a curved offset printing machine according to claim 1, characterized in that: A set of supports (10) is installed on the mounting platform (2) at the position corresponding to each set of cup wall pressurers (9), and a set of cup wall pressurers (9) is installed on the corresponding set of supports (10); The cup wall pressure device (9) includes a push rod (91) mounted on a support (10) and a pressure head (92) fixed to the telescopic end of the push rod (91). A pressure sensor is embedded at the top of the pressure head (92).

3. The broken cup detection and separation device for a curved offset printing machine according to claim 2, characterized in that: The front middle part of the outer shell of the push rod (91) is hinged to the support (10); Meanwhile, the mounting height of the support (10) on the mounting platform (2) is adjustable.

4. A broken cup detection and separation device for a curved offset printing machine according to any one of claims 1-3, characterized in that: A push rod 2 (11) is fixed inside the mounting platform (2), and the top telescopic end of the push rod 2 (11) extends out from the center hole of the mounting platform (2) and extends to the top of the mounting platform (2); Four sets of lower pressure plates (12) are fixed at the top of the telescopic end of the push rod 2 (11), and each set of lower pressure plates (12) is located directly above a set of detection stations. The lower pressure plates (12) can press down on the top of the paper cup and cooperate with the cup holder (8) to complete the clamping and fixing of the paper cup.

5. The broken cup detection and separation device for a curved offset printing machine according to claim 4, characterized in that: It also includes a power box (13), the bottom end of which is fixed to the power box (13).

6. The broken cup detection and separation device for a curved offset printing machine according to claim 5, characterized in that: A set of motors is installed and fixed inside the power box (13). The driving gear (16) fixed at the shaft end of the motor meshes with the driven gear (15) fixedly sleeved on the rotating frame (7).

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