Dividing device and digital printing machine

Abstract

The invention relates to the technical field of printing equipment, and discloses a dividing device and a digital printer, the dividing device comprises a rotating disc, a cam divider and a rotating assembly, and a plurality of molds are distributed on the rotating disc in the circumferential direction; the cam divider is provided with a force input shaft and a force output shaft, the force input shaft is connected with the driving mechanism, and the force output shaft is connected with the turntable; the rotating assembly comprises a box body, a driving gear arranged in the box body and a plurality of connecting shafts, the box body is fixed to the center of the rotating disc, the connecting shafts correspond to the molds one to one, one end of each connecting shaft is connected with the corresponding mold, the other end of each connecting shaft extends into the box body and is provided with a driven gear, and the driven gears are meshed with the driving gear. According to the indexing device, through accurate transmission of the force input shaft and the force output shaft of the cam indexer, intermittent rotation of the rotating disc is guaranteed, each mold can accurately stay at the feeding position and the printing position, the indexing positioning accuracy is high, the problems that printed patterns or characters deviate or are fuzzy and the like can be solved, and the printing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of printing equipment technology, and in particular to an indexing device. Background Technology

[0002] Digital printing is a comprehensive technology developed based on traditional printing technology. It uses electronic text as a carrier, transmitting it via network to digital printing equipment for direct printing. Currently, it is often necessary to print on the outer walls of cylindrical objects, such as various bottles or rollers. This printing process involves multiple different colors; one pigment is applied to the outer wall of the cylindrical object at one station, then transferred to another station for another pigment, and so on, until the desired pattern or text is printed on the outer wall. However, existing digital printing presses lack sufficient precision in the indexing and positioning of cylindrical objects during the indexing process, leading to problems such as offset and blurring of the printed pattern or text, thus affecting print quality. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides an indexing device and a digital printing machine, which can achieve high-precision indexing and positioning of cylindrical articles and improve printing quality.

[0004] On the one hand, this application provides an indexing device, comprising: A turntable having multiple molds distributed circumferentially, the molds being used to accommodate cylindrical items to be printed; A cam divider has an input shaft and an output shaft. The input shaft is connected to a drive mechanism, and the output shaft is connected to a turntable, for driving the turntable to rotate intermittently. The rotating assembly includes a housing, a drive gear disposed within the housing, and multiple connecting shafts. The housing is fixed at the center of the turntable. Each of the multiple connecting shafts corresponds to a single mold, with one end of each connecting shaft connected to a mold and the other end extending into the housing and fitted with a driven gear. The driven gear meshes with the drive gear so that when the drive gear rotates, it can drive the mold to rotate around its own axis.

[0005] In one possible implementation, the indexing device further includes: A gas assembly includes a fixed bearing, a gas tube, and a connector. The fixed bearing is fixed to the turntable. The gas tube passes through the fixed bearing along the extension direction of the connecting shaft. One end of the connector extends into the fixed bearing and communicates with the gas tube. The other end of the connector is used to connect to an external gas source. The air pipe has an open end near the mold and a closed end. The open end of the air pipe is connected to the interior of the mold. The front face of the mold has an air hole that connects to its interior. The closed end of the air pipe is connected to the connecting shaft.

[0006] In one possible implementation, the vents are provided in a plurality of spaces, which are evenly spaced apart around the circumference of the mold.

[0007] In one possible implementation, the indexing device further includes: The power assembly includes a first drive member and a rotating shaft. The first drive member is located on the side of the cam divider facing away from the turntable. The rotating shaft is arranged along the axial direction of the turntable. One end of the rotating shaft passes through the housing and is connected to the drive gear, and the other end is connected to the output shaft of the first drive member, so that the rotating shaft drives the drive gear to rotate under the drive of the first drive member.

[0008] In one possible implementation, the drive mechanism includes: The second driving component has an output shaft connected to a main pulley, and one end of the input shaft is provided with a driven pulley. A belt connects the driven pulley and the main pulley.

[0009] In one possible implementation, it also includes a bearing housing, the housing having a plurality of perforations spaced apart along its circumference, each perforation having a protrusion on its wall, the bearing housing having slides on both sides, the bearing housing having an elastic element on its top, the connecting shaft passing through the bearing housing and extending into the housing, and the connecting shaft being able to rotate freely relative to the bearing housing. Wherein, the bearing housing is installed in the through hole, the protrusion is adapted to the slide rail, and the elastic element abuts against the top wall of the through hole, so that the bearing housing can have a certain amount of movement in the vertical direction.

[0010] In one possible implementation, the indexing device further includes: The feeding assembly includes a feeding frame, a feeding conveyor belt, a baffle plate, and a baffle power component. The feeding frame is located on the outer periphery of the turntable. The feeding conveyor belt is rotatably mounted on the feeding frame. The baffle plate is connected to the output end of the baffle power component. The baffle power component is installed at one end of the feeding frame near the turntable and is used to drive the baffle plate to move up and down to block or release items.

[0011] In one possible implementation, the feeding assembly further includes a motor, a drive shaft, and a driven shaft. The drive shaft and the driven shaft are rotatably disposed at opposite ends of the feeding frame. A driven wheel is sleeved on one end of the drive shaft. The motor is fixed to the feeding frame, and the output shaft of the motor is connected to the drive wheel. A synchronous belt connects the drive wheel and the driven wheel.

[0012] In one possible implementation, the indexing device further includes: The feeding assembly includes a first linear motion unit, a second linear motion unit, and two mounting plates. The first linear motion unit is located between the feeding rack and the turntable, and can reciprocate along the feeding direction of the feeding conveyor belt. The second linear motion unit is connected to the first linear motion unit, and can reciprocate along a feeding direction perpendicular to the feeding conveyor belt. The two mounting plates are respectively connected to the two output ends of the second linear motion unit so that they can move closer to or further away from each other. A feeding plate is connected to the end of the mounting plate near the feeding rack.

[0013] On the other hand, this application provides a digital printing machine including the indexing device of the above embodiments.

[0014] The technical solutions provided in this application have the following advantages compared with the prior art: The precise transmission of the input and output shafts of the cam divider ensures the intermittent rotation of the turntable, allowing each mold to accurately stop at the feeding and printing positions. This high indexing accuracy prevents issues such as offset or blurring of printed patterns or text, thus improving print quality. Simultaneously, during the printing process on the outer wall of cylindrical objects mounted on the mold, the meshing of the driving and driven gears allows the mold to rotate around its own axis, ensuring even ink distribution on the cylindrical objects and further enhancing print quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the indexing device of the present invention; Figure 2 This is a schematic diagram of another embodiment of the indexing device of the present invention; Figure 3 This is a top view schematic diagram of an embodiment of the indexing device of the present invention; Figure 4 This is a schematic diagram of the power component, drive gear, and mold in the indexing device of the present invention; Figure 5 This is an exploded view of the mold, connecting shaft and rotating assembly in the indexing device of the present invention; Figure 6This is a schematic diagram of the structure of the feeding component and the feeding component in the indexing device of the present invention; Figure 7 This is a schematic diagram of another embodiment of the feeding component and the feeding component in the indexing device of the present invention.

[0016] Icon labels: 10. Turntable; 20. Mold; 20a. Air vent; 30. Cam divider; 40. Rotating assembly; 41. Housing; 41a. Perforation; 42. Drive gear; 50. Gas assembly; 51. Fixed bearing; 52. Air pipe; 53. Connector; 60. Power assembly; 61. First drive component; 62. Rotating shaft; 70. Drive mechanism; 71. Second drive component; 72. Main pulley; 73. Driven pulley; 74. Belt; 80. Connecting shaft; 90. Feeding element Components; 91. Feeding rack; 92. Material blocking power component; 93. Material blocking plate; 94. Motor; 95. Drive wheel; 96. Driven wheel; 97. Synchronous belt; 98. Feeding conveyor belt; 99. Driven shaft; 100. Material feeding assembly; 101. First linear motion unit; 102. Second linear motion unit; 103. Mounting plate; 104. Material feeding plate; 110. Bearing seat; 110a. Slide rail; 120. Driven gear; 130. Elastic element; 140. Protrusion. Detailed Implementation

[0017] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0018] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0019] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0020] like Figures 1 to 3 As shown, an indexing device according to an embodiment of the present invention includes a turntable 10, a cam divider 30, and a rotating assembly 40.

[0021] Specifically, the turntable 10 has multiple molds 20 distributed circumferentially, which are used to accommodate cylindrical items to be printed. The cam divider 30 has an input shaft and an output shaft. The input shaft is connected to the drive mechanism 70, and the output shaft is connected to the turntable 10, which drives the turntable 10 to rotate intermittently. That is, when the input shaft is driven to rotate by the drive mechanism 70, the output shaft of the cam divider 30 will rotate intermittently, thereby driving the turntable 10 to rotate intermittently at a predetermined angle. This ensures that each mold 20 has a stable dwell time when it reaches the designated position, so as to perform precise printing operations (such as loading, printing, etc.).

[0022] Furthermore, the indexing device also includes a rotating assembly 40, which includes a housing 41, a drive gear 42 disposed within the housing 41, and multiple connecting shafts 80. The housing 41 is fixed at the center of the turntable 10. Each of the multiple connecting shafts 80 corresponds one-to-one with a multiple mold 20, with one end of each connecting shaft 80 connected to a mold 20 and the other end extending into the housing 41 and fitted with a driven gear 120. The driven gear 120 meshes with the drive gear 42, so that when the drive gear 42 rotates, it can drive the mold 20 to rotate around its own axis. In this way, when printing on the outer wall of a cylindrical item, by driving the drive gear 42 to rotate, and since the driven gear 120 meshes with the drive gear 42 and is mounted on the connecting shaft 80, the connecting shaft 80 rotates, causing the mold 20 to rotate around its own axis, thereby causing the cylindrical item fitted on the mold 20 to rotate as well. This achieves omnidirectional printing on the outer wall of the cylindrical item, greatly improving printing efficiency and effect.

[0023] It should be noted that the term "multiple" in this application refers to two or more, and the specific number can be set according to actual production needs to meet the production requirements of different scales and efficiencies.

[0024] In practical applications, the indexing device of this application needs to be used in conjunction with a digital printing mechanism to achieve efficient printing of cylindrical items. Specifically, the digital printing mechanism is located above the turntable 10. When the digital printing machine starts working, the drive mechanism 70 drives the input shaft of the cam divider 30 to rotate, which in turn drives the turntable 10 to rotate intermittently via the output shaft. At this time, the foremost mold 20 rotates to the loading position, and the cylindrical item is placed on the mold 20. Then, the drive mechanism 70 continues to drive the input shaft of the cam divider 30 to rotate, causing the turntable 10 to start rotating, thereby transferring the cylindrical item on the mold 20 to the printing position corresponding to the digital printing mechanism. Meanwhile, the next mold 20 moves to the loading position, allowing the next cylindrical item to be placed on the mold 20. Then the printing head of the digital printing mechanism descends and contacts the outer wall of the cylindrical item. During this process, the turntable 10 stops rotating, and the driving gear 42 drives the driven gear 120 to rotate. Since the driven gear 120 is connected to the connecting shaft 80, and one end of the connecting shaft 80 is connected to the mold 20, the mold 20 is driven to rotate around its own axis, so that the outer wall of the cylindrical item is evenly inked. After printing at this printing position is completed, the turntable 10 continues to rotate so that the printed cylindrical item is transferred to the next printing station. At the same time, a new cylindrical item is transferred to the printing position for printing. This cycle repeats, thereby achieving continuous and efficient printing operations.

[0025] For example, the drive mechanism 70 may be a power component that can be used to drive the input shaft to rotate in the prior art, or it may adopt the specific structure in the following embodiments, without limitation.

[0026] In summary, the indexing device of this application, through the precise transmission of the input and output shafts of the cam divider 30, ensures the intermittent rotation of the turntable 10, allowing each mold 20 to accurately stop at the feeding and printing positions. This high indexing accuracy avoids problems such as offset or blurring of printed patterns or text, thus improving print quality. Simultaneously, during the printing process on the outer wall of the cylindrical object fitted onto the mold 20, the meshing transmission between the driving gear 42 and the driven gear 120 enables the mold 20 to rotate around its own axis, ensuring uniform ink application to the cylindrical object and further improving print quality.

[0027] Please refer to Figure 2 and Figure 3 In one possible implementation, the indexing device further includes a gas assembly 50, which includes a fixed bearing 51, an air pipe 52, and a connector 53. The fixed bearing 51 is fixed to the turntable 10. The air pipe 52 passes through the fixed bearing 51 along the extension direction of the connecting shaft 80. One end of the connector 53 extends into the fixed bearing 51 and communicates with the air pipe 52. The other end of the connector 53 is used to connect to a negative pressure device. The end of the air pipe 52 near the mold 20 is an open end, and the other end is a closed end. The open end of the air pipe 52 communicates with the interior of the mold 20. The front face of the mold 20 has an air hole 20a communicating with its interior. The closed end of the air pipe 52 is connected to the connecting shaft 80.

[0028] In other words, during the process of fitting the cylindrical item with the mold 20, the mold 20 extends into the cylindrical item so that the cylindrical item fits onto the mold 20. Since the negative pressure device is connected to the air pipe 52 through the connector 53, and the open end of the air pipe 52 is connected to the inside of the mold 20, the gas inside the cylindrical item can be sucked out through the air hole 20a on the front face of the mold 20, thereby forming a certain suction force, which firmly fits the cylindrical item onto the mold 20, preventing it from shifting during the printing process, thus ensuring the accuracy and quality of the printing. After printing is completed, the negative pressure system introduces gas into the air pipe 52 and discharges it into the cylindrical item through the air hole 20a on the front face of the mold 20, increasing the internal air pressure. This allows the cylindrical item to separate from the mold 20 under the action of air pressure, so that the printed cylindrical item can be easily removed from the mold 20, improving production efficiency. The whole process is simple to operate and will not cause damage to the cylindrical item or the mold 20, further ensuring the integrity of the product and the service life of the mold 20.

[0029] In one possible implementation, multiple vents 20a are provided, and these vents 20a are evenly spaced around the circumference of the mold 20. This uniform distribution of the vents 20a ensures that when the cylindrical item is fitted onto the mold 20, gas can be uniformly drawn out or introduced from all directions, thereby further enhancing the adsorption stability or separation effect between the cylindrical item and the mold 20. Thus, during the printing process, the uniform distribution of vents 20a prevents the cylindrical item from shifting or shaking due to uneven local force, ensuring printing accuracy and consistency. Simultaneously, after printing, the simultaneous introduction of gas through the multiple vents 20a allows the internal air pressure of the cylindrical item to rise rapidly and uniformly, thereby facilitating smoother separation from the mold 20 and improving the efficiency and automation of the production process.

[0030] Please refer to Figure 4 In one possible implementation, the indexing device further includes a power assembly 60, which comprises a first drive member 61 and a rotating shaft 62. The first drive member 61 is located on the side of the cam divider 30 facing away from the turntable 10. The rotating shaft 62 is arranged axially along the turntable 10. One end of the rotating shaft 62 passes through the housing 41 and is connected to the drive gear 42, while the other end is connected to the output shaft of the first drive member 61, so that the rotating shaft 62 drives the drive gear 42 to rotate under the drive of the first drive member 61. Thus, when printing on cylindrical items, the first drive member 61 drives the rotating shaft 62 to rotate. Since one end of the rotating shaft 62 passes through the housing 41 and is connected to the drive gear 42, it can drive the drive gear 42 to rotate, thereby causing the driven gear 120 to drive the connecting shaft 80 and the mold 20 to rotate around their own axis, achieving uniform ink application to the outer wall of the cylindrical item. This design not only improves printing quality but also ensures the stability and continuity of the printing process. In practical applications, the first driving component 61 can be a servo motor 94, or a power component commonly used in the prior art to drive the rotating shaft 62 to rotate, and there is no limitation on this.

[0031] Please refer to Figure 2 In one possible implementation, the drive mechanism 70 includes a second drive member 71. The output shaft of the second drive member 71 is connected to a main pulley 72, and one end of the input shaft is provided with a driven pulley 73. A belt connects the driven pulley 73 and the main pulley 72. That is, when the second drive member 71 is started, its output shaft drives the main pulley 72 to rotate. Since the belt connects the main pulley 72 and the driven pulley 73, the rotation of the main pulley 72 is transmitted to the driven pulley 73 through the belt, thereby driving the input shaft to rotate. Belt drive has the advantages of smooth transmission and low noise, and can buffer and absorb vibration to a certain extent, ensuring the stability of the drive mechanism 70. In practical applications, the second drive member 71 can also be a servo motor 94 or other suitable power components according to specific requirements.

[0032] Please refer to Figure 5 In one possible embodiment, it further includes a bearing seat 110. The housing 41 has a plurality of through holes 41a spaced apart along its circumference. Each through hole 41a has a protrusion 140 on its wall. The bearing seat 110 has slide rails 110a on both sides. A connecting shaft 80 passes through the bearing seat 110 and extends into the housing 41, and the connecting shaft 80 can rotate freely relative to the bearing seat 1110. The bearing seat 110 is installed within the through holes 41a, and the protrusions 140 are adapted to the slide rails 110a. In this way, the bearing housing 110 can be circumferentially positioned and installed within the through hole 41a. Furthermore, through the cooperation between the protrusion 140 and the slide 110a, the bearing housing 110 has good stability after installation and is not prone to shaking or shifting. It also facilitates the installation and disassembly of the bearing housing 110. When maintenance or repair of the connecting shaft 80 or the inside of the housing 41 is required, the bearing housing 110 can be easily removed from the through hole 41a, and then the relevant components can be operated.

[0033] In practical applications, the driving gear 42 and driven gear 120 use helical gears, and there will be backlash during transmission, which will affect the transmission accuracy and make it impossible to accurately move cylindrical items to the workstation. Therefore, a flexible element 130 is further provided on the top of the bearing housing 110. When the bearing housing 110 is assembled in the through hole 41a, the flexible element 130 abuts against the top wall of the through hole 41a, allowing the bearing housing 110 to have a certain amount of vertical movement. In this way, during transmission, when the driving gear 42 and driven gear 120 produce transmission errors due to backlash, the flexible element 130 can, through its own elastic deformation, cause a small displacement of the bearing housing 110 in the vertical direction, which can compensate for the backlash generated during gear transmission, thereby effectively improving the transmission accuracy and ensuring that the cylindrical items can be accurately moved to the workstation, meeting the high-precision transmission requirements of the indexing device in digital printing machines. At the same time, the setting of the flexible element 130 will not affect the circumferential positioning and installation stability of the bearing housing 110, ensuring the reliable operation of the entire indexing device.

[0034] Please refer to Figure 6 and Figure 7 In one possible implementation, the indexing device further includes a feeding assembly 90, which includes a feeding frame 91, a feeding conveyor belt 98, a baffle plate 93, and a baffle power member 92. The feeding frame 91 is located on the outer periphery of the turntable 10, and the feeding conveyor belt 98 is rotatably mounted on the feeding frame 91. The baffle plate 93 is connected to the output end of the baffle power member 92, which is mounted on one end of the feeding frame 91 near the turntable 10 and is used to drive the baffle plate 93 to move up and down to block or release items.

[0035] In practical applications, cylindrical items are stacked on the feeding conveyor belt 98. The feeding conveyor belt 98 transports the cylindrical items to the end of the feeding rack 91 near the turntable 10. At this time, the blocking power component 92 can drive the blocking plate 93 to move up and down according to a preset program. That is, when feeding is needed, the blocking plate 93 moves downward to release a cylindrical item, allowing it to smoothly enter the mold 20 position on the turntable 10 for fitting; when feeding is not needed or during feeding intervals, the blocking plate 93 moves upward to block subsequent cylindrical items, preventing them from entering prematurely and affecting the normal production rhythm. In this way, the orderly control of the feeding process is achieved, ensuring that each mold 20 can accurately and timely obtain the cylindrical items to be printed, improving the automation level and production efficiency of the entire printing production line, while also reducing errors and instabilities that may be caused by manual intervention, further ensuring the stability and consistency of printing quality. In addition, the blocking power component 92 can be flexibly adjusted according to actual production needs to adapt to the feeding requirements of cylindrical items of different specifications and different production speeds, enhancing the versatility and adaptability of the indexing device. Among them, the material blocking power component 92 can be a cylinder, but is not limited to it.

[0036] Please refer to Figure 6 and Figure 7 Furthermore, the indexing device also includes a material feeding assembly 100, which includes a first linear motion unit 101, a second linear motion unit 102, and two mounting plates 103. The first linear motion unit 101 is located between the feeding rack 91 and the turntable 10, and can reciprocate along the feeding direction of the feeding conveyor belt 98. The second linear motion unit 102 is connected to the first linear motion unit 101, and can reciprocate along the feeding direction perpendicular to the feeding conveyor belt 98. The two mounting plates 103 are respectively connected to the two output ends of the second linear motion unit 102 so that they can move closer to or further away from each other. A material feeding piece 104 is connected to one end of the mounting plate 103 near the feeding rack 91.

[0037] In practical applications, after the cylindrical item is released by the baffle plate 93 into the end of the loading rack 91 near the turntable 10, the first linear motion unit 101 starts working. It reciprocates along the feeding direction of the loading conveyor belt 98, moving the material-shifting component 100 to a suitable position for manipulating the cylindrical item. Then, the second linear motion unit 102 starts, reciprocating along the feeding direction perpendicular to the loading conveyor belt 98, causing the two mounting plates 103 to move closer or further apart. Specifically, when material shifting is required, the two mounting plates 103 move closer together, so that the material-shifting piece 104 connected to the end of the mounting plate 103 near the loading rack 91 is inserted between the cylindrical items. Then, the first linear motion unit 101 moves in the opposite direction, accurately shifting the cylindrical item to the mold 20 position on the turntable 10, completing the material shifting action. When material shifting is not required, the two mounting plates 103 move further apart, and the material-shifting piece 104 leaves the cylindrical item area, avoiding interference with the normal conveying of the cylindrical item. In other words, through the coordinated operation of the first linear motion unit 101 and the second linear motion unit 102, and the relative movement of the two mounting plates 103, the feeding assembly 100 can efficiently and accurately move the cylindrical items to the designated position, further improving the automation level and production efficiency of the entire printing production line.

[0038] Specifically, the feeding assembly 90 also includes a motor 94, a drive shaft, and a driven shaft 99. The drive shaft and driven shaft 99 are rotatably disposed at both ends of the feeding frame 91. A driven wheel 96 is sleeved on one end of the drive shaft. The motor 94 is fixed to the feeding frame 91, and the output shaft of the motor 94 is connected to a drive wheel 95. A synchronous belt 97 connects the drive wheel 95 and the driven wheel 96. Thus, when the motor 94 starts, its output shaft drives the drive wheel 95 to rotate. Since the synchronous belt 97 connects the drive wheel 95 and the driven wheel 96, the rotation of the drive wheel 95 is transmitted to the driven wheel 96 through the synchronous belt 97, thereby driving the drive shaft to rotate. Since the drive shaft and the driven shaft 99 are connected by a feeding conveyor belt 98, the rotation of the drive shaft drives the feeding conveyor belt 98 to operate, realizing the conveying of cylindrical items.

[0039] The present invention also provides a digital printing machine, including the indexing device of the above embodiments.

[0040] This digital printing press, utilizing an indexing device, can precisely position and index cylindrical items during the printing process. When the cylindrical item is conveyed to the indexing device by the feeding assembly 90, the indexing device accurately controls the rotation angle and position of the item according to preset programs and parameters, ensuring that each cylindrical item is printed at the optimal angle and position, thereby greatly improving printing accuracy and quality. Moreover, due to the efficient operation of the indexing device, the entire production process of the digital printing press is smoother, reducing printing errors and repetitive operations caused by inaccurate item positioning, further improving production efficiency and reducing production costs.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An indexing device, characterized in that, The application relates to a degree device for a rotary printing machine. The degree device comprises a rotary disc, a cam divider and a rotary assembly. The rotary disc is provided with a plurality of molds which are used for sleeving cylindrical articles to be printed. The cam divider is provided with an input shaft and an output shaft.

2. The protractor device of claim 1, wherein, The input shaft is connected with a driving mechanism. The output shaft is connected with the rotary disc and is used for driving the rotary disc to rotate intermittently. The rotary assembly comprises a box, a driving gear and a plurality of connecting shafts.

3. The protractor device of claim 1, wherein, The box is fixed at the center of the rotary disc.

4. The protractor device of claim 1, wherein, The connecting shafts are in one-to-one correspondence with the molds. One end of each connecting shaft is connected with a mold.

5. The protractor device of claim 1, wherein, The other end of each connecting shaft extends into the box and is provided with a driven gear. The driven gear is engaged with the driving gear.

6. The protractor device of claim 1, wherein, When the driving gear rotates, the mold can rotate around its axis. The degree device further comprises a gas assembly.

7. The protractor device of claim 1, wherein, The gas assembly comprises a fixed bearing, a gas pipe and a connecting head. The fixed bearing is fixed on the rotary disc. The gas pipe extends through the fixed bearing along the extension direction of the connecting shaft. One end of the connecting head extends into the fixed bearing and is connected with the gas pipe. The other end of the connecting head is used for connecting an external gas source. One end of the gas pipe close to the mold is an open end. The other end of the gas pipe is a closed end. The open end of the gas pipe is connected with the inside of the mold. The front end surface of the mold is provided with a plurality of air holes which are connected with the inside of the mold. The closed end of the gas pipe is connected with the connecting shaft. The air holes are uniformly and evenly distributed around the circumference of the mold. The degree device further comprises a power assembly. The power assembly comprises a first driving member and a rotating shaft. The first driving member is located on the side of the cam divider which is away from the rotary disc. The rotating shaft is arranged along the axial direction of the rotary disc. One end of the rotating shaft extends into the box and is connected with the driving gear. The other end of the rotating shaft is connected with the output shaft of the first driving member. When the first driving member drives, the rotating shaft drives the driving gear to rotate. The driving mechanism comprises a second driving member. The output shaft of the second driving member is connected with a main pulley. One end of the input shaft is provided with a slave pulley. The slave pulley and the main pulley are connected with a belt. The degree device further comprises a bearing seat. The box is provided with a plurality of through holes which are arranged along the circumference of the box. Each through hole is provided with a protrusion on the hole wall. The bearing seat is provided with a slide on both sides. The bearing seat is provided with an elastic member on the top. The connecting shaft extends into the box through the bearing seat and can rotate freely relative to the bearing seat. When the bearing seat is installed in the through hole, the protrusion is matched with the slide. The elastic member abuts against the top wall of the through hole. The bearing seat can have a certain space in the vertical direction. The degree device further comprises a feeding assembly. The feeding assembly comprises a feeding rack, a feeding conveyor belt, a blocking plate and a blocking power member. The feeding rack is arranged on the outer circumferential side of the rotary disc. The feeding conveyor belt is rotatably installed on the feeding rack. The blocking plate is connected with the output end of the blocking power member. The blocking power member is installed on one end of the feeding rack which is close to the rotary disc. The blocking power member drives the blocking plate to move up and down to block or release the articles.

8. The protractor device of claim 7, wherein, The upper feeding assembly further comprises a motor, a driving shaft and a driven shaft, the driving shaft and the driven shaft are rotatably arranged at two ends of the upper feeding frame, one end of the driving shaft is sleeved with a driven wheel, the motor is fixed to the upper feeding frame, an output shaft of the motor is connected with a driving wheel, and a synchronous belt is connected between the driving wheel and the driven wheel.

9. The protractor device of claim 7, wherein, The indexing device further comprises: The poking assembly comprises a first linear motion unit, a second linear motion unit and two mounting plates, the first linear motion unit is located between the upper feeding frame and the rotary disc, the first linear motion unit can reciprocate along the feeding direction of the upper feeding conveyor belt, the second linear motion unit is connected with the first linear motion unit, the second linear motion unit can reciprocate along a direction perpendicular to the feeding direction of the upper feeding conveyor belt, two mounting plates are connected with two output ends of the second linear motion unit respectively, the mounting plates can approach or move away from each other, and one end of the mounting plate close to the upper feeding frame is connected with a poking piece.

10. A digital printer characterized by comprising: An indexing device according to any one of claims 1 to 9.

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