An auxiliary plate mounting device for a gravure printing machine
By designing an auxiliary plate mounting device with a top plate shaft, positioning components, and axial adjustment structure, the problems of end cap wear and shaft damage in gravure printing presses were solved, enabling flexible adaptation to plate rollers of different lengths and process expansion of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG FASBON INTELLIGENT TECH IND CO LTD
- Filing Date
- 2026-06-02
- Publication Date
- 2026-07-14
AI Technical Summary
The shaftless end caps of existing gravure printing machines are prone to wear and damage, and the shaftless end is also prone to damage. Furthermore, they cannot be flexibly adapted to printing rollers of different lengths, resulting in poor equipment versatility.
An auxiliary plate mounting device was designed, including a top plate shaft, a positioning component, a connector, and an axial adjustment structure. It can flexibly adapt to plate rollers of different lengths through an adjusting sleeve and multi-position positioning holes, and reduce stress concentration through a tapered fit.
It extends the service life of the plug, protects the shaftless end from damage, expands the process range of the equipment, and improves the ease of operation and production efficiency.
Smart Images
Figure CN122379147A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of gravure printing machine technology, specifically relating to an auxiliary plate mounting device for mounting plate rollers of different lengths between the shaftless drive ends of a printing machine. Background Technology
[0002] A plate-setting press is a common type of printing equipment, with each color group equipped with a shaftless plate-setting device. In the prior art, a typical shaftless plate-setting device (such as that disclosed in patent CN221022760U) includes two coaxial, horizontally opposite shaftless ends. One end is driven by a motor and is telescopic, while the other end is telescopically adjustable via a lead screw. The plate roller is placed directly between the two shaftless ends, clamping the roller axis from both ends towards the center. Ink is adhered to the grooves on the roller surface for printing.
[0003] However, the aforementioned prior art has the following drawbacks: First, when the printing roller is long or has a large diameter, the weight of the printing roller acts directly on the end cap without a shaft. The small contact area leads to stress concentration, causing the end cap to wear out too quickly.
[0004] Secondly, when the printing roller is short, the shaftless end needs to extend excessively to clamp the printing roller, resulting in an excessively long lever arm, making the shaftless end prone to bending, deformation, or damage.
[0005] Third, due to the inherent spacing of the plate mounting structure, wide-format printing presses are difficult to adapt to shorter plate rollers, resulting in poor equipment versatility and limited process range. Summary of the Invention
[0006] The present invention aims to provide an auxiliary plate mounting device for gravure printing machines to solve the technical problems of easy wear and damage of shaftless end caps, and inability to flexibly adapt to plate rollers of different lengths in the prior art.
[0007] To achieve the above objectives, the present invention provides the following technical solution: An auxiliary plate mounting device for a gravure printing machine, characterized in that it comprises: A top plate shaft 7 is used to support the plate roller 8; A first positioning component is disposed at the first end of the top plate shaft 7 and is used to abut against the first end face of the plate roller 8; A second positioning component is slidably sleeved on the second end of the top plate shaft 7 and used to abut against the second end face of the plate roller 8; A first connector is disposed at the first end of the top plate shaft 7; A second connector is disposed at the second end of the top plate shaft 7; And an axial adjustment structure for changing the axial distance between the second positioning component and the second connector, the axial adjustment structure including at least one adjustment sleeve 10 selectively fitted onto the top plate shaft 7.
[0008] Furthermore, the adjusting sleeve 10 is a steel sleeve, which can be selectively arranged to change the total axial length of the axial adjusting structure.
[0009] Furthermore, the axial adjustment structure also includes a plurality of axial positioning positions disposed at the first end of the top plate shaft 7, and the first positioning component can be selectively fixed to any of the axial positioning positions to change the axial installation position of the first positioning component on the top plate shaft 7.
[0010] Furthermore, the plurality of axial positioning stops include a plurality of positioning holes 15 spaced axially at the first end of the top plate shaft 7; The first positioning component includes a first top plate shaft plug 3 and a positioning element 5. The positioning element 5 can be selectively inserted into one of the positioning holes 15 to fix the first top plate shaft plug 3 at a corresponding axial position on the top plate shaft 7.
[0011] Furthermore, the positioning element 5 is a shaft pin, and the positioning hole 15 is a pin through hole.
[0012] Furthermore, it also includes a locking sleeve 2, which is sleeved on the tail side of the first top plate shaft plug 3 to prevent the positioning member 5 from falling off.
[0013] Furthermore, the second positioning component includes a second top plate shaft plug 9, which is slidably sleeved on the second end of the top plate shaft 7, and its first end has a conical surface for abutting against the second end face of the plate roller 8.
[0014] Furthermore, the first connector is a first plug sleeve 1, which includes a tapered hole facing the outside of the top plate shaft 7 and an internal opening groove; The second connector is a second plug sleeve 12, which includes a tapered hole facing outwards from the top plate shaft 7.
[0015] Furthermore, a keyway is provided at the first end of the top plate shaft 7, and a second flat key 6 is provided in the keyway. The first connector is connected to the top plate shaft 7 by the second flat key 6.
[0016] Furthermore, the first positioning component includes a first top plate shaft plug 3, and a first flat key 4 is provided on the outer circular surface of the first top plate shaft plug 3 for cooperating with the groove at the end of the plate roller 8 to transmit torque.
[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Reduce wear: By bearing the weight of the plate roller through the top plate bearing and increasing the contact area through the tapered fit of the end cap sleeve, the contact stress is significantly reduced, and the service life of the end cap is extended.
[0018] 2. Protect the equipment: The top shaft bears the bending load of the printing roller, and the original shaftless end does not need to extend excessively to avoid damage caused by excessive lever arm.
[0019] 3. Expanded process range: The axial adjustment structure—especially the selectively addable and removeable adjustment sleeve—allows for flexible adaptation to printing rollers of different lengths, enabling wide-format printing presses to print narrow-format materials, thus greatly expanding the equipment's process range.
[0020] 4. Easy to operate: The adjustment sleeve is a sliding sleeve, which can be used to complete the plate mounting and adjustment without special tools, and the plate changing efficiency is high.
[0021] 5. Flexible structure: When a larger adjustment range is required, it can be further combined with the multi-level coarse adjustment function of the first positioning component to form a two-dimensional adjustment system, which can adapt to a wider range of changes in the length of the printing roller. Attached Figure Description
[0022] Figure 1 This is a 3D assembly diagram of the auxiliary plate mounting device for a gravure printing machine according to the present invention; Figure 2 This is a split sequence diagram of the auxiliary plate mounting device for a gravure printing machine according to the present invention; Figure 3 This is an exploded cross-sectional view of the auxiliary plate mounting device for the gravure printing machine of the present invention; Figure 4 This is a schematic diagram showing the incompletely tightened installation state of the auxiliary plate mounting device for the gravure printing machine according to the present invention; Figure 5 This is a schematic diagram showing the fully tightened installation state of the auxiliary plate mounting device for the gravure printing machine according to the present invention.
[0023] The components include: 1. First end cap sleeve (first connecting piece); 2. Locking sleeve; 3. First top plate shaft end cap; 4. First flat key; 5. Positioning piece (shaft pin); 6. Second flat key; 7. Top plate shaft; 8. Printing roller; 9. Second top plate shaft end cap; 10. Adjusting sleeve (steel sleeve); 12. Second end cap sleeve (second connecting piece); 13. First shaftless end; 14. Second shaftless end; 15. Positioning hole. Detailed Implementation
[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to specific embodiments.
[0025] Example 1 (Implementation using only the fine-tuning structure) like Figures 1 to 5 As shown, this embodiment provides an auxiliary plate mounting device for a gravure printing machine.
[0026] The top plate shaft 7 is the core support of the entire device and is a long shaft. Its first end (left end) has a step with a keyway. Its second end (right end) is a smooth shaft used for sliding installation of various adjusting components.
[0027] The first positioning component includes a first top plate shaft plug 3. The first top plate shaft plug 3 is fixedly sleeved on the first end of the top plate shaft 7, and its outer circular surface is provided with a first flat key 4 for cooperating with the groove at the end of the plate roller 8 to transmit torque.
[0028] The first connecting component is a first plug sleeve 1, which is fitted onto the outermost side of the first end of the top plate shaft 7. The first plug sleeve 1 includes a tapered hole facing the outer side of the top plate shaft 7 and an internal opening groove. A second flat key 6 is provided in the keyway of the top plate shaft 7, and one side of the second flat key 6 is accommodated in the opening groove. The first plug sleeve 1 is connected to the keyway of the top plate shaft 7 via the second flat key 6 to transmit torque from the first shaftless end 13.
[0029] The second positioning component includes a second top plate shaft plug 9, which is slidably sleeved on the second end of the top plate shaft 7 (its first end left end) and has a conical surface for abutting against the second end face (right end face) of the top plate roller 8.
[0030] The axial adjustment structure includes multiple steel sleeves 10, which are slidably fitted onto the top plate shaft 7 and located between the second top plate shaft plug 9 and the second connecting member. The number of steel sleeves 10 can be selected as needed, and multiple steel sleeves can be arranged in an orderly manner. It should be understood that the material of the steel sleeves 10 is only one option for achieving the function; iron, copper, aluminum, alloys, etc., can all be selected.
[0031] The second connector is a second plug sleeve 12, which includes a tapered hole facing the outside of the top plate shaft 7, and is sleeved on the second end of the top plate shaft 7. Its inner hole is a tapered hole.
[0032] Installation method (taking a shorter printing roller as an example) S1: Fix the first top plate shaft plug 3 at the predetermined position at the first end of the top plate shaft 7, and put on the first plug sleeve 1.
[0033] S2: Insert the printing roller 8 into the top printing shaft 7 from the right side and push it to the left until its left end face abuts against the conical surface of the first top printing shaft plug 3.
[0034] S3: Insert the second top plate shaft plug 9, with its conical surface facing left, and push it to the right end face of the top plate roller 8.
[0035] At this time, there is a certain gap between the right side of the second top plate shaft plug 9 and the right end of the top plate shaft 7.
[0036] S4: Based on the size of the gap, select an appropriate number of steel sleeves 10 and insert them one by one to fill the gap. The larger the gap, the more steel sleeves 10 are required.
[0037] S5: Put the second end cap 12 onto the rightmost end.
[0038] S6: Lift the entire device onto the printing press, aligning the first end cap 1 and the second end cap 12 with the first shaftless end 13 and the second shaftless end 14, respectively. Start the drive mechanism to move both ends synchronously toward the center, respectively clamping the corresponding end caps to complete the axial clamping.
[0039] Power transmission path The first shaftless end 13 rotates → drives the first end cap sleeve 1 via a flat key (not shown) → drives the top plate shaft 7 via a second flat key 6 → drives the first top plate shaft end cap 3 via a positioning pin 5 → drives the printing roller 8 to rotate synchronously via the first flat key 4. The second shaftless end 14 rotates accordingly.
[0040] Adjustment principle of steel sleeve The function of the steel sleeve 10 is to compensate for the dimensional difference between the length of the printing roller and the length of the top plate shaft 7. When the printing roller is short, the gap between the right end face of the printing roller and the right end of the top plate shaft is large, which can be filled by increasing the number of steel sleeves; when the printing roller is long, the gap is small, which can be filled by reducing the number of steel sleeves or even not using steel sleeves. The thickness of the steel sleeve can be set in various specifications as needed, and multiple steel sleeves can be arranged for use to achieve precise length adaptation.
[0041] Example 2: Implementation of Two-Dimensional Adjustment This embodiment, based on embodiment 1, further adds a coarse adjustment function to accommodate a wider range of changes in the length of the printing roller.
[0042] Specifically, the first end of the top plate shaft 7 has a row of multiple pin through-hole positioning holes 15 spaced axially, serving as multiple axial positioning positions. The first positioning assembly includes a first top plate shaft plug 3 and a shaft pin. Based on the length range of the printing roller 8 to be installed, the operator selects a suitable pin through-hole, passes the shaft pin through the through-hole of the first top plate shaft plug 3 and the selected pin through-hole, thereby fixing the first top plate shaft plug 3 to the corresponding axial position on the top plate shaft 7. A locking sleeve 2 is fitted onto the tail side of the first top plate shaft plug 3 to prevent the shaft pin 5 from falling off.
[0043] During installation, first select the left-end reference setting (coarse adjustment) according to the length range of the printing roller, and then perform precise filling (fine adjustment) by adding or removing steel sleeves as described in Example 1. The two adjustment dimensions work together to enable the device to adapt to various printing rollers with vastly different lengths.
[0044] The gravure printing press auxiliary plate-loading device provided by this invention has an ingenious structure, is easy to operate, and is highly versatile. It can effectively solve the problems of wear, damage, and poor adaptability of existing plate-loading devices. In particular, its axial adjustment structure design allows operators to quickly complete the plate-loading operation of rollers of different lengths without special tools, greatly improving the process flexibility and production efficiency of the equipment. It has good industrial practical value and promising prospects for widespread application.
[0045] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.
Claims
1. An auxiliary plate-mounting device for a gravure printing machine, characterized in that, include: A top plate shaft (7) is used to support the plate roller (8); A first positioning component is disposed at the first end of the top plate shaft (7) and is used to abut against the first end face of the plate roller (8); A second positioning component is slidably sleeved on the second end of the top plate shaft (7) and used to abut against the second end face of the plate roller (8); A first connector is disposed at the first end of the top plate shaft (7); A second connector is disposed at the second end of the top plate shaft (7); And an axial adjustment structure for changing the axial distance between the second positioning component and the second connector, the axial adjustment structure including at least one adjustment sleeve (10) selectively fitted onto the top plate shaft (7).
2. The gravure printing machine auxiliary plate mounting device according to claim 1, characterized in that, The adjusting sleeve (10) is a steel sleeve, which can be selectively arranged to change the total axial length of the axial adjusting structure.
3. The gravure printing machine auxiliary plate mounting device according to claim 1, characterized in that, The axial adjustment structure also includes a plurality of axial positioning positions disposed at the first end of the top plate shaft (7). The first positioning component can be selectively fixed to any of the axial positioning positions to change the axial installation position of the first positioning component on the top plate shaft (7).
4. The gravure printing machine auxiliary plate mounting device according to claim 3, characterized in that, The plurality of axial positioning positions include a plurality of positioning holes (15) spaced axially at the first end of the top plate shaft (7); The first positioning component includes a first top plate shaft plug (3) and a positioning element (5). The positioning element (5) can be selectively inserted into one of the positioning holes (15) to fix the first top plate shaft plug (3) at a corresponding axial position on the top plate shaft (7).
5. The gravure printing machine auxiliary plate mounting device according to claim 4, characterized in that, The positioning element (5) is a shaft pin, and the positioning hole (15) is a pin through hole.
6. The gravure printing press auxiliary plate mounting device according to claim 4, characterized in that, It also includes a locking sleeve (2), which is fitted onto the tail side of the first top plate shaft plug (3) to prevent the positioning member (5) from falling off.
7. The auxiliary plate mounting device for a gravure printing machine according to claim 1, characterized in that, The second positioning component includes a second top plate shaft plug (9), which is slidably sleeved on the second end of the top plate shaft (7), and its first end has a conical surface for abutting against the second end face of the plate roller (8).
8. The auxiliary plate mounting device for a gravure printing machine according to claim 1, characterized in that, The first connector is a first plug sleeve (1), which includes a tapered hole facing the outside of the top plate shaft (7) and an internal opening groove; The second connector is a second plug sleeve (12), which includes a tapered hole facing outwards from the top plate shaft (7).
9. The auxiliary plate-mounting device for a gravure printing machine according to claim 1, characterized in that, The first end of the top plate shaft (7) is provided with a keyway, and a second flat key (6) is provided in the keyway. The first connector is connected to the top plate shaft (7) by the second flat key (6).
10. The gravure printing press auxiliary plate mounting device according to claim 1, characterized in that, The first positioning component includes a first top plate shaft plug (3), and a first flat key (4) is provided on the outer circular surface of the first top plate shaft plug (3) for cooperating with the groove at the end of the plate roller (8) to transmit torque.