Winding mechanism for printing machine

Abstract

The utility model discloses a winding mechanism for a printing machine, which is characterized by comprising a frame, a driving roller and a winding shaft, and the driving roller is rotatably mounted on the frame; two supporting plates are symmetrically arranged at the right end of the rack front and back, the two supporting plates are arranged on the right sides of the two ends of the driving roller correspondingly, and the top faces of the supporting plates are obliquely arranged downwards from right to left; the two ends of the winding shaft are each provided with a bearing, and the bearings at the two ends of the winding shaft are placed on the supporting plates respectively. The inner side of each supporting plate is provided with a pushing piece, and the pushing pieces push the winding shaft to move leftwards and enable the winding shaft to move leftwards to be close to or make contact with the outer surface of the right side of the driving roller. According to the utility model, the convenience and efficiency of rolling and material changing are improved, and the printing efficiency is also ensured.

Description

Technical Field

[0001] The utility model relates to the field of printing, in particular to a winding mechanism for a printing machine. Background Art

[0002] The patterns or information on the surface of labels and film products are generally produced by printing. During the printing process, the unprinted film roll is installed at the unwinding end, and then the information to be printed is printed on the surface of the product through the printing mechanism. Finally, the printed product is reeled up by the reel. If the conventional motor is used to directly drive the reel for reeling, there are the following shortcomings:

[0003] 1. After winding a roll, the printing equipment needs to be stopped and replaced with an empty winding shaft. The roll changing efficiency is relatively low and will also affect the printing efficiency;

[0004] 2. During the replacement process, it needs to be moved down, and the labor intensity of the operator is relatively high. Summary of the Invention

[0005] The utility model aims to provide a winding mechanism for a printing machine, which improves the convenience of film roll unloading, reduces the labor intensity of operators, and improves printing efficiency by using the structure.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a winding mechanism for a printing press, comprising a frame, a driving roller and a winding shaft, wherein the driving roller is rotatably mounted on the frame;

[0007] Two support plates are symmetrically arranged at the front and rear ends of the right end of the frame. The two support plates are respectively arranged on the right sides of both ends of the driving roller, and the top surfaces of the support plates are arranged downwardly from right to left;

[0008] A bearing is installed at each end of the winding shaft, and the bearings at each end of the winding shaft are placed on the support plate respectively;

[0009] A pushing member is respectively provided on the inner side of each support plate, and the pushing member pushes the winding shaft to move leftward, and makes the winding shaft move leftward and approach or contact the right outer surface of the driving roller.

[0010] In the above technical solution, the pushing member includes a push plate and a tension spring. The left end of the push plate is rotatably connected to the frame via a rotating shaft. The rotating shaft is arranged below the driving roller. The left end of the tension spring is connected to the frame. The right end of the tension spring is connected to the middle part of the push plate. The tension spring gives the push plate a pulling force to the left, so that the push plate pushes the winding shaft to move to the left.

[0011] In the above technical solution, when a downward thrust is applied to the right end of the push plate, the push plate rotates clockwise around the frame via the rotating shaft, and the right end of the push plate is below the top plane of the support plate.

[0012] In the above technical solution, a groove matching the outer surface of the bottom of the bearing is provided on the right side of the top of the support plate.

[0013] In the above technical solution, an annular groove is provided on the outer surface of the bearing, the width of the annular groove is greater than the thickness of the support plate, and the bottom surface of the annular groove abuts against the top surface of the support plate.

[0014] In the above technical solution, the cross section of the annular groove is an arc-shaped surface or a V-shaped surface that is concave toward the bearing axis.

[0015] In the above technical solution, a pull rod is further provided above the driving roller, the pull rod is arranged parallel to the driving roller, and both ends of the pull rod are rotatably connected to the frame via a connecting piece;

[0016] A stop block is provided on the frame on the left side of each connecting member, and a second tension spring is also provided. The left end of the second tension spring is connected to the frame, and the right end of the second tension spring is connected to the corresponding connecting member. The second tension spring pulls the connecting member to rotate counterclockwise so that the connecting member rests on the stop block.

[0017] In the above technical solution, an extension plate extending toward the right is provided in the middle of each connecting member, and an arc-shaped bracket is provided on the top of the extension plate.

[0018] In the above technical solution, when the connecting member rotates clockwise around the frame and stretches the second tension spring, the pull rod is rotated and arranged on the right side of the driving roller, and the opening of the arc-shaped bracket is arranged to face right or toward the lower right.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] 1. The utility model utilizes a driving roller as a winding drive mechanism for the product. By setting a support plate with an inclined top surface, the winding shaft is supported by the support plate and approaches the driving roller through the action of gravity, so that the winding shaft is in contact with the driving roller or the product wound by the winding shaft is in contact with the driving roller, thereby realizing the winding of the product. During the roll changing process, the winding shaft can be directly pulled to the right to separate from the support plate to achieve quick disassembly of the winding shaft, and another empty winding shaft can be directly placed on the support plate to quickly wind up the product, which can effectively improve the falling efficiency of the film roll, reduce the labor intensity of the operator, and do not need to stop the machine for replacement, thereby improving printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A top view of

[0023] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0024] Figure 4a This is a schematic diagram of the structure during the winding process in the first embodiment of the present invention;

[0025] Figure 4b This is a schematic diagram of the structure of the first embodiment of the present invention in a state where the film roll and the winding shaft are driven to the right and away from the driving roller;

[0026] Figure 4c This is a schematic diagram of the structure of the first embodiment of the present invention in which the bearing at the end of the reel is in the groove and the next empty reel is placed;

[0027] Figure 5 This is a schematic structural diagram of the second embodiment of the present utility model;

[0028] Figure 6a This is a schematic structural diagram of a reel placed on an extension plate in the second embodiment of the present invention;

[0029] Figure 6b This is a schematic diagram of the structure of the pull rod in the clockwise rotation process in the second embodiment of the present invention (the reel is placed on the extension plate);

[0030] Figure 6c This is a structural diagram of the process in which the pull rod rotates clockwise and the reel falls from the extension plate to the support plate in the second embodiment of the present invention.

[0031] Among them: 1. Frame; 2. Driving roller; 3. Winding shaft; 4. Support plate; 5. Bearing; 6. Winding part; 7. Push plate; 8. Tension spring; 9. Rotating shaft; 10. Stopper; 11. Groove; 12. Film roll; 21. Pull rod; 22. Connecting piece; 23. Stopper; 24. Second tension spring; 25. Extension plate; 26. Arc bracket; 27. Connecting shaft; 28. Connecting bearing. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0033] Example 1: See Figure 1-4c As shown, a winding mechanism for a printing press comprises a frame 1, a driving roller 2 and a winding shaft 3, wherein the driving roller 2 is rotatably mounted on the frame 1;

[0034] Two support plates 4 are symmetrically provided at the front and rear ends of the right end of the frame 1. The two support plates 4 are respectively provided on the right sides of both ends of the driving roller 2. The top surfaces of the support plates 4 are tilted downward from right to left.

[0035] A bearing 5 is installed at each end of the winding shaft 3, and the bearings at each end of the winding shaft 3 are placed on a support plate 4;

[0036] A pushing member is provided on the inner side of each support plate 4 , and the pushing member pushes the winding shaft 3 to move leftward, and causes the winding shaft 3 to move leftward and approach or contact the right outer surface of the driving roller 2 .

[0037] In this embodiment, during actual use, a drive mechanism (not shown in the figure), such as a motor, is provided on the frame. The drive mechanism drives the drive roller to rotate clockwise, thereby driving the film roll to move to the right. The bearings at both ends of the reel are directly placed on the support plates on both sides. Since the top of the support plates is tilted downward from right to left, the reel is moved to the left along the support plates under its own weight. When the reel is not yet reeling in the product, the outer surface of the left end of the reel contacts the outer surface of the right side of the drive roller. The middle part of the reel is the reeling portion 6. The outer diameter of the reeling portion is larger than the diameter of the reel. The reeling portion is used for reeling in the product. The left outer surface of the winding section first contacts the right outer surface of the drive roller. During this process, due to the contact between the winding shaft and the drive roller, the drive roller will synchronously drive the winding shaft to rotate counterclockwise. It is only necessary to wrap the end of the product around the winding shaft. Due to the rotation of the winding shaft, the product will be wound on the winding shaft to form a film roll 12. During this process, the diameter of the product on the winding shaft gradually increases, which will simultaneously push the winding shaft to move to the right. During this process, the winding shaft needs to rotate and rewind. Therefore, by setting the bearing, the winding shaft can rotate around the bearing, thereby achieving winding stability and preventing rigid friction between the winding shaft and the support plate. When replacing the winding shaft after winding is completed, the winding shaft loaded with the film roll is directly pulled to the right to separate it from the contact with the drive roller, and then the film roll is cut off, and another winding shaft is quickly placed on the support plates on both sides. The above-mentioned winding action can be repeated. In this process, the operator can remove the film roll that has been rolled up without affecting the normal printing of the printing press and without stopping the machine for replacement.

[0038] Furthermore, in order to prevent the driving roller from jumping and causing winding problems during the process of synchronously driving the winding shaft to rotate and winding the product, the left outer surface of the winding shaft or the left outer surface of the film roll wound on the winding shaft is always in contact with the driving roller to ensure the normal rotation and winding of the winding shaft. Therefore, a pushing member is also provided, and the pushing member is used to give the winding shaft a left thrust to push the winding shaft to move to the left, so that the left side of the winding shaft or the left outer surface of the film roll wound on the winding shaft is always in contact with the right outer surface of the driving roller, ensuring that when the driving roller rotates, it can synchronously drive the winding shaft to rotate and achieve stable winding of the product.

[0039] See also Figure 1-4c As shown, the pushing member includes a push plate 7 and a tension spring 8. The left end of the push plate 7 is rotatably connected to the frame 1 via a rotating shaft 9. The rotating shaft 9 is arranged below the driving roller 2. The left end of the tension spring 8 is connected to the frame 1, and the right end of the tension spring 8 is connected to the middle part of the push plate 7. The tension spring 8 gives the push plate 7 a pulling force toward the left, so that the push plate 7 pushes the winding shaft 3 to move toward the left.

[0040] When a downward thrust is applied to the right end of the push plate, the push plate 7 rotates clockwise around the frame 1 via the rotating shaft 9, and the right end of the push plate can rotate below the top plane of the support plate.

[0041] The cam is then moved to the left by the spring which in turn moves the film roll to the right, and the cam is moved to the right by the spring which in turn moves the film roll to the left. When the winding is completed and the winding shaft with the film roll needs to be taken out, the operator uses a certain force to give the film roll or the winding shaft a pulling force to the right, driving the winding shaft to move to the right. During the movement of the winding shaft to the right, the push plate is pushed to rotate clockwise and the tension spring is stretched until the top of the push plate retracts below the top plane of the support plate. The winding shaft then separates from the push plate. At this time, the restoring force of the tension spring pulls the push plate to rotate counterclockwise and makes the push plate close to the drive roller.

[0042] In order to prevent the push plate from colliding with the drive roller, and to avoid affecting the placement of the idle take-up shaft on the support plate at the back, and to ensure that it can be smoothly placed between the push plate and the drive roller, a stopper 10 is also provided on the inner side of the support plate or on the frame. The stopper can prevent the top of the push plate from rotating leftward and continuously rotating and contacting the drive roller, so that after the tension spring pulls the support plate to rotate counterclockwise, the support plate will rest on the stopper. At this time, a V-shaped angle is formed between the support plate and the right side of the drive roller. When the take-up shaft needs to be placed on the support plate, the two ends of the take-up shaft are directly placed within the V-shaped angle. With its own weight resting on the support plate, the push plate will give the take-up shaft a leftward thrust, so that the take-up shaft can stably approach or contact the drive roller, ensuring a stable take-up action. During the take-up process, as the diameter of the film roll increases, the drive roller and the diameter of the film roll push the take-up shaft to move rightward, which will gradually push the push plate to rotate clockwise. Furthermore, as the diameter of the film roll gradually increases, its overall weight also increases, thus steadily pushing the push plate to rotate clockwise. Furthermore, as the top of the push plate gradually rotates to the right during the winding process, the longer the tension spring stretches, the greater its restoring force, allowing the push plate to exert greater leftward thrust on the heavy winding shaft carrying the film roll, ensuring that the film roll is always in contact with the drive roller, ensuring winding stability and quality.

[0043] See also Figure 1 、 3 As shown, a groove 11 matching the outer surface of the bottom of the bearing 5 is provided on the right side of the top of the support plate 4. The depth of the groove is relatively shallow, and the depth of the groove is 1 / 6 to 1 / 4 of the bearing diameter.

[0044] In this embodiment, in order to facilitate the rapid unloading of the film roll and the rapid replacement of an empty reel, a groove is provided on the right side of the support plate. When unloading the film roll, a pulling force is directly applied to the film roll and the reel to the right, pulling the reel to move rightward along the support plate, so that the outer surface of the bottom of the bearing at the end of the reel directly abuts within the groove. The groove is used to limit the bearing, the reel, and the film roll outside of the reel, so that the reel will not roll leftward toward the drive roller due to the tilted support plate. Moreover, after the reel bearing abuts within the groove, the push plate automatically resets and approaches the drive roller, leaving a gap between the film roll and the drive roller. The operator quickly cuts the product outside the film roll, then places the empty reel directly on the support plate between the push plate and the drive roller, and then quickly presses the end of the product conveyed by the drive roller onto the reel. With the drive roller driving the product to move and the reel rotating, the film roll can be quickly rewound by the reel, thereby enabling the rapid removal of the film roll.

[0045] When an empty take-up shaft is placed on the support plate for winding, the operator can use the material transfer cart to directly insert it between the two support plates, then move the material transfer cart upward to lift the take-up shaft with the film roll off the support plate and the groove thereon, and then use the material transfer cart to move the film roll away (or remove the film roll from the take-up shaft and move it away). In this way, the normal winding of the printed product is not affected, and the film roll that has been wound can also be removed during the winding process of the take-up shaft.

[0046] Furthermore, in order to facilitate the operator to drive the winding shaft with the film roll to move to the right along the support plate (more labor-saving), the inclination angle of the top surface of the support plate is relatively small, generally less than 5°, so that the force of gravity causing the winding shaft to roll to the left will not be particularly large. Therefore, the push plate is used to ensure that the winding shaft is stably close to the drive roller.

[0047] See also Figure 2 As shown, an annular groove is provided on the outer surface of the bearing 5 , the width of the annular groove is greater than the thickness of the support plate, and the bottom surface of the annular groove abuts against the top surface of the support plate.

[0048] The cross section of the annular groove is an arc-shaped surface or a V-shaped surface that is concave toward the bearing axis.

[0049] In this embodiment, in order to ensure that the bearing at the end of the winding shaft is stably located on the support plate and the winding shaft can rotate stably, an annular groove with an arc-shaped or V-shaped interface is provided on the outer surface of the bearing, thereby preventing the winding shaft from moving axially, and the corresponding bearing will be located on the corresponding support plate.

[0050] Example 2: See Figure 5-6c As shown, a winding mechanism for a printing press is provided, which is based on the first embodiment and has the following additional mechanisms:

[0051] A pull rod 21 is further provided above the driving roller 2. The pull rod 21 is provided parallel to the driving roller 2. Both ends of the pull rod 21 are rotatably connected to the frame 1 via a connecting piece 22.

[0052] A stopper 23 is provided on the frame on the left side of each connecting member 22, and a second tension spring 24 is also provided. The left end of the second tension spring 24 is connected to the frame 1, and the right end of the second tension spring 24 is connected to the corresponding connecting member 22. The second tension spring pulls the connecting member to rotate counterclockwise so that the connecting member rests on the stopper.

[0053] An extension plate 25 extending toward the right is provided in the middle of each connecting member 22 , and an arc-shaped bracket 26 is provided on the top of the extension plate 25 .

[0054] When the connecting member rotates clockwise around the frame and stretches the second tension spring, the pull rod is rotated and arranged on the right side of the driving roller, and the opening of the arc-shaped bracket is arranged to face right or to the lower right.

[0055] In this embodiment, to facilitate the quick placement of an unused reel onto the support plates after the wound film roll is detached from the drive roller, a pull rod, connector, and extension plate are provided. Under normal conditions, when the connector abuts against the stop, the pull rod is directly above the drive roller and directly above its axis. At this point, the top surface of the extension plate is parallel to the horizontal plane. Therefore, an unused reel can be pre-placed on the two extension plates, supported by the arc-shaped brackets. After the film roll (product) has been wound up on the reel on the support plate to a predetermined length, the operator pulls the film roll and reel to the right, and the bearing of the reel on the support plate is pressed against the groove. At the same time, the push plate returns to its original position. The operator cuts off the end of the film roll, then grabs the pull rod and rotates it toward the lower right. During this process, the connecting piece rotates clockwise, and the extension plate also rotates toward the lower right, causing the top surface of the extension plate to tilt. The reel on it will roll to the right and fall onto the upper right outer surface of the drive roller until the bearings at both ends fall onto the corresponding support plate (the reel will be on the left side of the push plate), and the reel can be quickly placed. After placement is completed, the tension of the pull rod is released, and the restoring force of the second tension spring pulls the connecting piece to rotate counterclockwise, causing the pull rod to return to its original position. In this way, during the reel on the support plate, an empty reel can be placed directly above the drive roller in advance, supported by the extension plates on both sides.

[0056] Furthermore, the center of the driving roller is rotatably connected to the frame through the connecting shaft 27, and the two ends of the connecting shaft will be outside the two ends of the driving roller. The connecting parts on both sides are respectively located at the two ends of the driving roller, and the bottom of the connecting part is rotatably connected to the connecting shaft (preferably, a connecting bearing 28 is used to rotatably connect to the connecting shaft). In this way, the space occupied can be reduced.

[0057] In this embodiment, rapid unloading and shaft changing can be achieved without stopping the machine, and the labor intensity of unloading is relatively low, and the printing efficiency can also be guaranteed.

[0058] Of course, it is also possible to not provide an arc-shaped bracket on the extension plate. It is only necessary to ensure that when the second tension spring is in the recovery state, when the connecting piece is against the block, the top surface of the extension plate tilts downward from right to left. In this way, when the reel is placed on the extension plate, it will be blocked by the extension plate and the connecting piece and will not fall to the right.

Claims

1. A winding mechanism for a printing press, characterized in that: It includes a frame, a driving roller and a winding shaft, wherein the driving roller is rotatably mounted on the frame; Two support plates are symmetrically arranged at the front and rear ends of the right end of the frame. The two support plates are respectively arranged on the right sides of both ends of the driving roller, and the top surfaces of the support plates are arranged downwardly from right to left; A bearing is installed at each end of the winding shaft, and the bearings at each end of the winding shaft are placed on the support plate respectively; A pushing member is respectively provided on the inner side of each support plate, and the pushing member pushes the winding shaft to move leftward, and makes the winding shaft move leftward and approach or contact the right outer surface of the driving roller.

2. The winding mechanism for a printing press according to claim 1, characterized in that: The pushing member includes a push plate and a tension spring. The left end of the push plate is rotatably connected to the frame via a rotating shaft. The rotating shaft is arranged below the driving roller. The left end of the tension spring is connected to the frame. The right end of the tension spring is connected to the middle part of the push plate. The tension spring gives the push plate a pulling force toward the left, so that the push plate pushes the winding shaft to move toward the left.

3. The winding mechanism for a printing press according to claim 2, characterized in that: When a downward thrust is applied to the right end of the push plate, the push plate rotates clockwise around the frame via the rotating shaft, and the right end of the push plate is below the top plane of the support plate.

4. The winding mechanism for a printing press according to claim 1, wherein: A groove matching the outer surface of the bottom of the bearing is provided on the right side of the top of the support plate.

5. The winding mechanism for a printing press according to claim 1, characterized in that: An annular groove is provided on the outer surface of the bearing, the width of the annular groove is greater than the thickness of the support plate, and the bottom surface of the annular groove abuts against the top surface of the support plate.

6. The winding mechanism for a printing press according to claim 5, characterized in that: The cross section of the annular groove is an arc-shaped surface or a V-shaped surface that is concave toward the bearing axis.

7. The winding mechanism for a printing press according to claim 1, characterized in that: A pull rod is further provided above the driving roller, the pull rod is arranged parallel to the driving roller, and both ends of the pull rod are rotatably connected to the frame via a connecting piece; A stop block is provided on the frame on the left side of each connecting member, and a second tension spring is also provided. The left end of the second tension spring is connected to the frame, and the right end of the second tension spring is connected to the corresponding connecting member. The second tension spring pulls the connecting member to rotate counterclockwise so that the connecting member rests on the stop block.

8. The winding mechanism for a printing press according to claim 7, characterized in that: An extension plate extending toward the right is provided in the middle of each connecting piece, and an arc-shaped bracket is provided on the top of the extension plate.

9. The winding mechanism for a printing press according to claim 8, characterized in that: When the connecting member rotates clockwise around the frame and stretches the second tension spring, the pull rod is rotated and arranged on the right side of the driving roller, and the opening of the arc-shaped bracket is arranged to face right or to the lower right.

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