Fixture for cylinder printing and printing equipment

Abstract

The utility model belongs to the technical field of ink-jet printing, overcomes the defects that an existing clamp for cylinder printing is narrow in application range and poor in printing effect, and provides a clamp for cylinder printing and printing equipment. The transmission rollers are arranged in the hollow part and are parallel to the first direction, and different pairs of transmission rollers have different intervals in the second direction, so that the transmission rollers can be used for clamping cylinders with different diameters respectively; the positioning assembly comprises a pair of guide rails, a supporting strip and a supporting piece, the pair of guide rails are parallel to the transmission rollers and located on the outer sides of the multiple pairs of transmission rollers, the two ends of the supporting strip are slidably connected with the guide rails respectively, the supporting piece can move and be fixed on the supporting strip in the direction parallel to the second direction, and the supporting piece abuts against and positions one end face of the cylinder. The clamp for cylinder printing and the printing equipment have the advantages of being wide in application range and good in printing effect.

Description

Technical Field

[0001] This utility model relates to the field of inkjet printing technology, and in particular to a fixture and printing equipment for printing cylindrical objects. Background Technology

[0002] Inkjet printing technology refers to the process of spraying ink onto a printing medium through nozzles on a printhead to obtain images or text. With the rapid development of inkjet technology, its applications are becoming more and more widespread. Printing media are generally two-dimensional planes, but the demand for printing three-dimensional products such as cylinders as printing media is also increasing.

[0003] However, existing cylindrical printing fixtures can only clamp cylinders of a fixed diameter for printing. These existing fixtures cannot adapt to cylinders of different diameters, resulting in a narrow range of applications and poor printing quality.

[0004] Therefore, there is an urgent need to provide a fixture and printing equipment for cylindrical printing that has a wide range of applications and good printing results. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies in printing cylinders, which have a narrow applicability and poor printing quality. To achieve one objective of this utility model, a cylinder printing fixture is provided, comprising: a frame with a hollow portion; multiple pairs of drive rollers, each drive roller arranged parallel to a first direction within the hollow portion, with different pairs of drive rollers having different spacing in a second direction so as to clamp cylinders of different diameters respectively; and a positioning assembly, including a pair of guide rails, a support bar, and a support member. The pair of guide rails are arranged parallel to the drive rollers and located outside the multiple pairs of drive rollers. The two ends of the support bar are slidably connected to a guide rail, and the support member can move and be fixed parallel to the second direction on the support bar. The support member abuts against and positions one end face of the cylinder.

[0006] Furthermore, the positioning component also includes a pair of sliding bearings. The two ends of the support bar are slidably mounted on a guide rail via a sliding bearing. The support bar is provided with a sliding groove, in which the support member can slide and be fixed.

[0007] Furthermore, the support includes a support block and a rubber-coated bearing disposed on the support block. The rubber-coated bearing is disposed on the top of the support block and can rotate freely. When the cylinder is clamped between the corresponding pair of transmission rollers, the support block slides in the sliding groove until the rotation center of the rubber-coated bearing coincides with the rotation center of the cylinder, and then one end face of the cylinder abuts against the rubber-coated bearing.

[0008] Furthermore, each drive roller has the same diameter and its central axis is located on the same horizontal plane, and the support block is rotatably connected to the sliding groove through a connecting bolt.

[0009] Furthermore, the support block is designed as a telescopic structure, with multiple connection points in the vertical direction, and the support block has different lengths when it is at different connection points.

[0010] Furthermore, the fixture for cylindrical printing also includes multiple drive components, the number of which is the same as the number of pairs of transmission rollers. Each drive component is used to drive a pair of transmission rollers. The drive component includes a drive motor, a synchronous belt, multiple synchronous pulleys, and multiple guide pulleys. The synchronous belt receives the driving force of the drive motor and is fitted onto at least one guide pulley. A synchronous pulley is arranged at the end of each transmission roller near the drive motor that drives it. The driving force of the drive motor is transmitted to the synchronous pulleys of the pair of transmission rollers via the multiple guide pulleys.

[0011] Furthermore, the central axes of different pairs of drive rollers have different wheelbases in the second direction, and the number of synchronous pulleys in different drive components is designed in proportion to the wheelbase of the corresponding drive roller.

[0012] Furthermore, the cylindrical printing fixture also includes a support assembly located in the hollow part. The support assembly includes a pair of parallel plates forming a rectangular hollow part, a first side plate and a second side plate, a pair of guide rails respectively fixed to the side of the first side plate and the second side plate facing away from the hollow part, a drive assembly disposed on the first side plate, and the second side plate rotatably supporting the end of each transmission roller away from the drive assembly that drives it.

[0013] Furthermore, the frame includes a base plate and a shell cover. The base plate supports the support assembly, and the shell cover covers a hollow part on the base plate. The frame is rectangular in shape. The first direction and the second direction are the length direction and the width direction of the frame, respectively. A pair of through slots are provided on the shell cover, and the connecting columns that are slidably connected to the two ends of the support bar to a guide rail move in the through slots.

[0014] To achieve another objective of this utility model, a printing device is provided, including a printing carriage, a printing platform, and a cylindrical printing fixture. The cylindrical printing fixture is any of the above-mentioned cylindrical printing fixtures. The cylindrical printing fixture is detachably connected to the printing platform, and the printing carriage prints on the cylinder using any of the above-mentioned cylindrical printing fixtures.

[0015] The beneficial effects of this utility model are as follows:

[0016] This utility model relates to a fixture and printing device for printing cylinders. By setting multiple pairs of transmission rollers, each pair of transmission rollers has two transmission rollers with different spacing. The different spacing can meet the clamping requirements of cylinders with different diameters, thereby meeting the printing needs of various cylinders. Therefore, it has a wide range of applications and good printing effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0018] Figure 1 A schematic diagram of a cylindrical printing fixture and a cylindrical object clamped thereon, provided in an embodiment of this utility model.

[0019] Figure 2 The schematic diagram of the cylindrical printing fixture provided in this embodiment of the utility model omits the shell cover from a certain perspective.

[0020] Figure 3 The cylindrical printing fixture provided in this embodiment of the present invention omits the structural schematic diagram of the shell cover from another perspective;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Frame; 11. Base plate; 12. Shell cover; 121. Through groove; 2. Drive roller; 3. Positioning assembly; 31. Guide rail; 32. Support bar; 321. Sliding groove; 33. Support component; 331. Support block; 3311. Connection point; 34. Rubber-coated bearing; 35. Sliding bearing; 36. Connecting column; 4. Drive assembly; 41. Drive motor; 42. Synchronous pulley; 43. Guide wheel; 5. Support assembly; 51. Parallel plate; 52. First side plate; 53. Second side plate; 10. Cylinder. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element limited by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0024] refer to Figures 1 to 3As an objective of this utility model, a fixture for printing cylindrical objects is provided, comprising a frame 1 with a hollow portion 1, multiple pairs of drive rollers 2, and a positioning assembly 3. In this embodiment, two pairs of drive rollers 2 are provided; however, more than two pairs of drive rollers 2 can be provided as needed. Each drive roller 2 is arranged parallel to a first direction within the hollow portion 1. In this embodiment, each drive roller 2 is arranged along the length of the frame 1, and each pair of drive rollers 2 includes two drive rollers 2. Different pairs of drive rollers 2 have different spacing in the second direction, thus allowing them to clamp cylinders 10 with different diameters. It should be noted that a cylinder should be understood as a column with a cylindrical outer surface, and the two sides of the cylindrical outer surface include other shaped surfaces, including planes. The positioning assembly 3 includes a pair of guide rails 31, a support bar 32, and a support member 33. The pair of guide rails 31 are arranged parallel to the drive rollers 2 and located outside the multiple pairs of drive rollers 2. The two ends of the support bar 32 are slidably connected to a guide rail 31 respectively. The support member 33 can move and be fixed parallel to the support bar 32 in the second direction. The support member 33 abuts against and positions one end face of the cylinder 10. Therefore, the cylinder printing fixture provided by this utility model, with different pairs of drive rollers 2 having two drive rollers 2 with different spacing, can meet the clamping needs of cylinders 10 with different diameters, thereby satisfying the printing needs of various cylinders 10 and achieving a wide range of applications and good printing results.

[0025] Please refer to the reference. Figure 2 Preferably, the positioning component 3 further includes a pair of sliding bearings 35. The two ends of the support bar 32 are slidably mounted on a guide rail 31 through a sliding bearing 35, so that the support bar 32 can move along the axial direction of the transmission roller 2 and be fixed at any position in the axial direction. The support bar 32 is provided with a sliding groove 321, and the support member 33 can slide and be fixed in the sliding groove 321, so that the support member 33 can move along the radial direction of the cylinder 10 and be fixed at any position in the radial direction. Therefore, the cylinder 10 can be accurately positioned against the ground.

[0026] Please refer to the reference. Figure 2 Preferably, the support member 33 includes a support block 331 and a rubber-coated bearing 34 disposed on the support block 331. The rubber-coated bearing 34 is disposed on the top of the support block 331 and can rotate freely. When the cylinder 10 is clamped between the corresponding pair of transmission rollers 2, the support block 331 is inserted into the sliding groove 321, for example, through a plug-in post (not shown), and slides in the sliding groove 321 until the rotation center of the rubber-coated bearing 34 coincides with the rotation center of the cylinder 10. Then, one end face of the cylinder 10 abuts against the rubber-coated bearing 34. In this way, not only is the positioning accuracy of the cylinder 10 improved, but the loading and unloading efficiency of the cylinder 10 is also improved.

[0027] Please refer to the reference. Figure 2Preferably, each transmission roller 2 has the same diameter and its central axis is located on the same horizontal plane, which facilitates the arrangement of the cylinder 10; the support block 331 is rotatably connected to the sliding groove 321 by a connecting bolt (not shown) that can fix an adjusting bolt, so that the support block 331 can rotate around the connecting bolt, and the position of the rubber-coated bearing 34 on the support block 331 can be adjusted more precisely.

[0028] Please refer to the reference. Figure 2 Preferably, the support block 331 is configured as a telescopic structure, and the support block 331 has multiple connection points 3311 in the vertical direction. The support block 331 has different lengths when it is at different connection points 3311. In this way, it is convenient to adjust the extension length of the support member 33 to accommodate cylinders 10 with different diameters.

[0029] Please refer to the reference. Figure 3 Specifically, the cylindrical printing fixture also includes multiple drive components 4, the number of which is the same as the number of pairs of transmission rollers 2. Each drive component 4 is used to drive a corresponding pair of transmission rollers 2. The drive component 4 includes a drive motor 41, a synchronous belt, multiple synchronous pulleys 42, and multiple guide pulleys 43. The synchronous belt receives the driving force of the drive motor 41 and is fitted onto at least one guide pulley 43. A synchronous pulley 42 is arranged at one end of each transmission roller 2 near the drive motor 41 that drives it. The driving force of the drive motor 41 is transmitted to the synchronous pulleys 42 of the pair of transmission rollers 2 via the multiple guide pulleys 43. By adopting the drive components 4 configured as described above, the rotation of each pair of transmission rollers 2 has the advantages of high transmission synchronization and accuracy.

[0030] Please refer to the reference. Figure 3 Preferably, the central axes of different pairs of drive rollers 2 have different wheelbases in the second direction. The number of synchronous wheels 42 of different drive components 4 is designed proportionally to the wheelbase of the corresponding drive roller 2. That is, for the distance between a pair of drive rollers 2 in the second direction, that is, the radial direction of the cylinder 10 on the horizontal plane, the larger the distance, the more synchronous wheels 42 are configured accordingly. For example, in the case where a pair of drive rollers 2 with a large distance corresponds to a cylinder 10 with a large diameter, sufficient guide wheels 43 should be set on the force transmission path between the output shaft of the drive motor 41 and the synchronous wheels 42 of the drive roller 2 to reduce the vibration of the drive roller 2, ensure smooth operation, and thus improve printing accuracy.

[0031] Please refer to the reference. Figure 1 and Figure 2Specifically, the cylindrical printing fixture also includes a support assembly 5 located in the hollow portion 1. The support assembly 5 includes a pair of parallel plates 51 forming a rectangular hollow portion, a first side plate 52, and a second side plate 53. A pair of guide rails 31 are respectively fixed to the side of the first side plate 52 and the second side plate 53 facing away from the hollow portion. A drive assembly 4 is disposed on the first side plate 52, and the second side plate 53 rotatably supports the end of each transmission roller 2 away from the drive assembly 4 that drives it. Therefore, the support assembly 5 has a stable structure, which is conducive to the reliable installation and precise movement of the transmission rollers 2 and the positioning assembly 3.

[0032] Please refer to the reference. Figure 1 and Figure 2 Specifically, the frame 1 includes a base plate 11 and a cover 12. The base plate 11 supports the support assembly 5, and the cover 12 covers the base plate 11, forming a hollow portion 1. The frame 1 is generally rectangular in shape. The first direction and the second direction are the length direction and the width direction of the frame 1, respectively. It is known that the second direction is perpendicular to the first direction. A pair of through slots 121 are provided on the cover 12, and the connecting posts 36, which are slidably connected to the two ends of the support bar 32 and respectively to a guide rail 31, move in the through slots 121. Therefore, the frame 1 has a compact structure, which is conducive to the detachable connection between the cylindrical printing fixture and the printing platform. Moreover, the setting of the pair of through slots 121 can further limit the movement of the support bar 32, ensuring the synchronous movement of the two ends of the support bar 32.

[0033] As another objective of this utility model, it also provides a printing device (not shown), which includes a printing carriage, a printing platform, and a cylindrical printing fixture. The cylindrical printing fixture is any of the above-described cylindrical printing fixtures. The cylindrical printing fixture is detachably connected to the printing platform, and the printing carriage prints the cylinder. The printing device can obtain the beneficial effects brought by any type of cylindrical printing fixture, which will not be elaborated further here. Therefore, the printing device has the technical advantages of being applicable to a wide range of cylinders and producing good printing results for cylinders.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture for printing cylindrical shapes, characterized in that, include: A frame with a hollow section; Multiple pairs of drive rollers, each of which is arranged parallel to the first direction in the hollow part, and different pairs of drive rollers have different spacing in the second direction so that they can be used to clamp a cylinder with a different diameter respectively. The positioning assembly includes a pair of guide rails, a support bar, and a support member. The pair of guide rails are arranged parallel to the transmission rollers and located outside the multiple pairs of transmission rollers. The two ends of the support bar are slidably connected to one of the guide rails respectively. The support member can move and be fixed on the support bar in a second direction. The support member abuts against and positions one end face of the cylinder.

2. The fixture for printing cylinders according to claim 1, characterized in that, The positioning component also includes a pair of sliding bearings. The two ends of the support bar are slidably mounted on a guide rail via one of the sliding bearings. The support bar is provided with a sliding groove, and the support member can slide and be fixed in the sliding groove.

3. The fixture for printing cylinders according to claim 2, characterized in that, The support includes a support block and a rubber-coated bearing disposed on the support block. The rubber-coated bearing is disposed on the top of the support block and can rotate freely. When the cylinder is clamped between the corresponding pair of transmission rollers, the support block slides in the sliding groove until the rotation center of the rubber-coated bearing coincides with the rotation center of the cylinder, and then one end face of the cylinder abuts against the rubber-coated bearing.

4. The fixture for printing cylinders according to claim 3, characterized in that, Each of the drive rollers has the same diameter and its central axis is located on the same horizontal plane. The support block is rotatably connected to the sliding groove by a connecting bolt.

5. The fixture for printing cylinders according to claim 3, characterized in that, The support block is configured as a telescopic structure, and the support block has multiple connection points in the vertical direction. The support block has different lengths when it is at different connection points.

6. The fixture for printing cylinders according to claim 1, characterized in that, The cylindrical printing fixture also includes multiple drive components, the number of which is the same as the number of pairs of transmission rollers. Each drive component is used to drive a pair of transmission rollers. Each drive component includes a drive motor, a synchronous belt, multiple synchronous pulleys, and multiple guide pulleys. The synchronous belt receives the driving force of the drive motor and is fitted onto at least one of the guide pulleys. A synchronous pulley is arranged at one end of each transmission roller near the drive motor that drives it. The driving force of the drive motor is transmitted to the synchronous pulleys of the pair of transmission rollers via the multiple guide pulleys.

7. The fixture for cylindrical printing according to claim 6, characterized in that, The central axes of different pairs of drive rollers have different wheelbases in the second direction, and the number of synchronous pulleys in different drive components is designed in proportion to the wheelbase of the corresponding drive roller.

8. The fixture for printing cylinders according to claim 6, characterized in that, The cylindrical printing fixture also includes a support assembly located in the hollow portion. The support assembly includes a pair of parallel plates forming a rectangular hollow portion, a first side plate, and a second side plate. A pair of guide rails are respectively fixed to the side of the first side plate and the second side plate facing away from the hollow portion. The drive assembly is disposed on the first side plate, and the second side plate rotatably supports one end of each of the transmission rollers away from the drive assembly that drives it.

9. The fixture for printing cylinders according to claim 8, characterized in that, The frame includes a base plate and a cover. The base plate supports the support assembly thereon. The cover is placed on the base plate to form the hollow portion. The frame is rectangular in shape. The first direction and the second direction are the length direction and the width direction of the frame, respectively. A pair of through slots are provided on the cover. Connecting posts that are slidably connected to a guide rail at both ends of the support bar can move in the through slots.

10. A printing apparatus, comprising a printing carriage, a printing platform, and a fixture for printing cylindrical objects, characterized in that, The cylinder printing fixture is the cylinder printing fixture according to any one of claims 1-9, the cylinder printing fixture is detachably connected to the printing platform, and the printing carriage prints the cylinder.

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