Automatic feeding device for printing machine

Abstract

The present invention discloses an automatic loading device for a printing press, comprising a printing press body, an external frame, a transfer trolley, a lifting device and an expansion device. The above structure integrates the printing press body, the external frame, the transfer trolley, the lifting device and the expansion device to realize a complete process of automatic loading. During the period when the transfer manipulator performs the transfer action, the transfer trolley is in an idle state and can perform the transfer operation, which significantly shortens the loading time. In addition, the design of the expansion device enables the support rod to have two use states. The support rod in the retracted use state occupies less space before expansion, and the damage to the upper surface of the transfer trolley is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of printing press feeding, and in particular to an automatic feeding device for a printing press. Background Art

[0002] Printing presses are indispensable equipment in modern industry and are widely used in the production of various printed materials such as books, newspapers, and packaging materials. It feeds a large amount of paper into the printing unit through the paper feeding mechanism, and then goes through processes such as inking and embossing to complete the printing of text and images. With the continuous development of automation technology, the working efficiency and quality of printing presses are constantly improving, and the demand for automatic feeding devices is also growing.

[0003] At present, the loading process of printing presses generally relies on the traditional semi-automatic mode. Specifically, this process first transports the pre-stacked paper to the vicinity of the printing press through a transfer cart. Subsequently, the transfer cart and the paper it carries are lifted to a height that matches the transfer robot using a lifting platform. At this time, the transfer robot moves up and down with the help of the lifting cylinder, absorbs the paper, and transfers the paper one by one to the printing unit for processing with the help of the lateral transmission mechanism. However, there is a significant technical bottleneck in this process: when the transfer robot performs the loading operation, the transfer cart must remain stationary and cannot transfer the paper at the same time. This means that a new round of transfer process can only be started after all the paper on the transfer cart has been consumed, which leads to the interruption of the loading operation, prolongs the overall operation cycle, and limits the continuous production capacity of the printing press.

[0004] In addition, if the transfer cart adopts a rod-shaped structure design to carry paper, a series of problems may arise when the gap between adjacent support rods is improperly set, especially when the gap is too large. During the lifting process of the paper, the larger gap can easily cause some of the paper to bend due to lack of sufficient support. In severe cases, the paper may even fall out of the gap, causing material waste and production line interruption. At the same time, during the lifting process, the edge of the paper may slide off the side of the transfer cart due to lack of proper constraints, further affecting the feeding efficiency and production quality. Therefore, the existing feeding method has significant room for improvement in terms of continuous operation capability, paper stability, and operating efficiency.

[0005] To this end, we provide an automatic feeding device for a printing press to solve the above problems. Summary of the invention

[0006] In view of the problems existing in the above-mentioned prior art, the present invention provides an automatic loading device for a printing press, which significantly improves the loading efficiency and the degree of automation. By integrating a transfer trolley, a lifting device and an expansion device, it can realize the rapid and accurate transfer of paper and automatic adjustment of the support area, greatly shortening the loading time, reducing manual intervention, and improving the continuous operation capacity and production efficiency of the printing press.

[0007] In order to achieve the above object, the present invention adopts an automatic feeding device of a printing press, comprising:

[0008] Printing machine body, external frame, transfer trolley, lifting device and expansion device, including:

[0009] A printing machine body, wherein an external frame is provided on the side of the printing machine body, and a transfer robot is provided on the top of the external frame;

[0010] An external frame, wherein a workbench for a transfer vehicle to enter is provided on the external frame, and the transfer robot is located between the workbench and the printing machine body;

[0011] A transfer trolley, wherein the upper surface of the transfer trolley is provided with a plurality of placement holes;

[0012] A lifting device, the lifting device comprises a lifting screw, a moving seat and a guide rod installed on a workbench, the number of the lifting screws is two and they are arranged relatively along the moving path of the transfer robot, the lifting motor provides power for the lifting screws, the lifting screw is provided with a moving seat that moves linearly along the lifting screw, and guide rods are provided on both sides of the moving seat to guide the moving seat to move linearly in a vertical direction;

[0013] The expansion device comprises a support rod and a driving motor that drives the support rod to rotate, the placement hole is located on the moving path of the expansion device, the top surfaces of several support rods form a supporting plane, the input end of the support rod is connected to the driving motor and part of the driving motor extends out of the placement hole, the driving motor is located on the lifting path of the above-mentioned moving seat, the support rod extends outward from the side of the driving motor to have an extension portion extending out of the placement hole, the extension portion is located on the lifting path of the above-mentioned moving seat, the support rod is also provided with a first supporting portion and a second supporting portion, the part of the support rod located inside the above-mentioned first supporting portion is also provided with a first threaded section, the first threaded section is provided with a moving block that is a matching structure with the first threaded section, the side of the first supporting portion is provided with a strip hole, the moving block is hinged with a first expansion plate, the second support portion is hinged with a second expansion plate, the first expansion plate is hinged to the outer side of the second expansion plate, and a support plate is provided at the hinge between the first expansion plate and the second expansion plate.

[0014] The above structure integrates the printing machine body, external frame, transfer trolley, lifting device and expansion device to realize the complete process of automatic loading. During the period when the transfer robot performs the transfer action, the transfer trolley is in an idle state and can perform transfer operations, which significantly shortens the loading time. In addition, the design of the expansion device allows the support rod to have two usage states. The support rod in the contracted usage state occupies less space before expansion, and the damage to the upper surface of the transfer trolley is reduced. Considering that the transfer robot mostly adopts a suction cup structure, it is usually accompanied by a downward pressure action when sucking paper. If the gap between two adjacent support rods is too large, it may cause part of the raised paper to bend, or even part of the paper to fall off from the gap. The expansion device expands the contact area between the support rod and the paper, so that the support rod is in an expanded usage state, effectively improving the support effect, and also reducing the gap between two adjacent support rods, thereby reducing the bending phenomenon of paper and the potential risk of paper slipping.

[0015] As a further optimization of the above scheme, the printer body is provided with a fixing hole, the extension is provided with a second threaded section, the second threaded section is provided with an insert that is a matching structure with the second threaded section, and the printer body is provided with a fixing hole for the insert to enter. Thanks to the structural layout of the first support part and the second support part, the support rod can avoid direct contact with the paper. Based on this structure, the rotation of the support rod is endowed with a dual function: first, the rotation of the support rod cooperates with the expansion device to promote the support rod to achieve expansion, thereby enhancing its support effect; second, through the coordinated action with the second threaded section, the insert and the fixing hole, the support rod can complete the insertion and fixing action, realize the stable fixation of its position, strengthen the fixing efficiency of the support rod, and achieve the dual improvement of function and stability.

[0016] As a further optimization of the above scheme, a first shielding member is provided on both sides of the supporting plane, and the above-mentioned first shielding member is located on the travel path of the above-mentioned movable seat. The first shielding member has two functions. The first function is to effectively prevent the paper position movement that may be caused by the expansion action of the expansion device; the second function is that the first shielding member can limit the travel path of the above-mentioned movable seat. On the one hand, it can prevent the movable seat from rising excessively. On the other hand, after the movable seat contacts the first shielding member and stops moving, it is ensured that the insert is aligned with the fixing hole, thereby ensuring the insertion effect of the insert, thus achieving multiple goals at one stroke.

[0017] As a further optimization of the above scheme, a linear slide groove is provided on the upper surface of the first shielding member, and two sliders sliding relative to or toward each other along the linear slide groove are provided on the slider, and a threaded hole is provided on the slider, a rotating screw is passed through the threaded hole, and a driving assembly is provided at the input end of the rotating screw, and a hinge rod is hinged on the side of the slider, and a second shielding member is hinged on the top surface of the hinge rod, and the second shielding member is a quadrilateral plate structure. The above design integrates the second shielding member, the slider and the hinge rod, and works together with the first shielding member to significantly expand the shielding range. Through the cross structure, a plurality of vertical support columns are constructed after the second shielding member is lifted. The wide gap left therebetween provides the operator with a window for intuitively monitoring the internal paper handling process, ensuring the transparency of the paper transfer process, and facilitating the rapid lowering of the moving seat after confirming the completion of the handling task, demonstrating a high degree of functional integration and operational convenience.

[0018] Based on the above structure, the rotation action of the rotating screw has two driving modes, the specific conditions are as follows:

[0019] The first is electric drive, wherein the drive assembly is an electric motor, and the electric motor drives the rotating screw to rotate;

[0020] The second type is a mechanical linkage structure, in which the driving assembly includes a gear, a rack, a driving block and an insert. The gear is connected to the rotating screw, a rack meshing with the gear is provided below the gear, a linear hole for limiting the linear movement of the rack is provided on the side of the fixing hole, a driving block is provided at one end of the rack, an inclined surface is provided on the insert and the driving block is located on the travel path of the inclined surface. In the optimized design, when the rotation of the support rod drives the insert to perform its insertion action, a mechanical linkage mechanism between the insert and the driving block is constructed. This linkage mechanism enables the insert to actively push the driving block and the connected rack to perform linear displacement, thereby triggering the rotation of the gear and indirectly driving the rotating screw to rotate synchronously. At the same time, the rotation of the support rod also realizes the effective expansion of the expansion device and ensures the stable fixation of the insert, and with the help of the linear propulsion force of the rack, the mechanical efficiency and application range of the support rod are significantly enhanced, achieving the optimization effect of compact structure and functional integration.

[0021] As a further optimization of the above solution, a spring is connected to the side of the rack away from the driving block and one end of the spring is fixed to the inner wall of the linear hole. The existence of the spring enables the rack to automatically return to the initial position when no external force is applied, thereby ensuring that the first shielding plate and the second shielding plate remain in a folded state under normal conditions, effectively realizing space saving. At the same time, the spring provides the necessary buffer force for the rack to prevent it from moving quickly in a straight line, ensuring that the gear connected to it can rotate slowly and smoothly.

[0022] An automatic feeding method for a printing press uses an automatic feeding device for a printing press as described in any of the above schemes.

[0023] The automatic feeding device of a printing press of the present invention has the following beneficial effects:

[0024] 1. The automatic loading device of a printing press of the present invention integrates a printing press body, an external frame, a transfer trolley, a lifting device and an expansion device to realize a complete process of automatic loading. During the period when the transfer robot performs the transfer action, the transfer trolley is in an idle state and can perform transfer operations, which significantly shortens the loading time. In addition, the design of the expansion device allows the support rod to have two use states. The support rod in the contracted use state occupies less space before expansion, and the damage to the upper surface of the transfer trolley is reduced. Considering that the transfer robot mostly adopts a suction cup structure, it is usually accompanied by a downward pressure action when sucking paper. If the gap between two adjacent support rods is too large, it may cause part of the lifted paper to bend, or even part of the paper to fall off from the gap. The expansion device expands the contact area between the support rod and the paper, so that the support rod is in an expanded use state, effectively improving the support effect, and also narrows the gap between two adjacent support rods, thereby reducing the bending phenomenon of paper and the potential risk of paper slipping.

[0025] 2. The automatic feeding device of a printing press of the present invention, thanks to the structural layout of the first support part and the second support part, the support rod can avoid direct contact with the paper. Based on this structure, the rotation of the support rod is endowed with dual functions: first, the rotation of the support rod cooperates with the expansion device to promote the support rod to achieve expansion, thereby enhancing its support effect; second, through the coordinated action with the second threaded section, the insert and the fixing hole, the support rod can complete the insertion and fixing action, realize the stable fixation of its position, strengthen the fixing efficiency of the support rod, and achieve the dual improvement of function and stability.

[0026] 3. The automatic feeding device of a printing press of the present invention is designed with a first shielding member, which has two functions. The first function is to effectively prevent the paper position from moving when the expansion device expands. The second function is that the first shielding member can limit the travel path of the above-mentioned movable seat. On the one hand, it can prevent the movable seat from rising excessively. On the other hand, after the movable seat contacts the first shielding member and stops moving, it ensures that the insert is aligned with the fixing hole, thereby ensuring the insertion effect of the insert, thus achieving multiple goals at one stroke.

[0027] 4. The automatic feeding device of a printing press of the present invention integrates a second shielding member, a slider and a hinged rod, and works in coordination with the first shielding member to significantly expand the shielding range. Through the cross structure, a plurality of vertical support columns are constructed after the second shielding member is lifted. The wide gaps left between them provide a window for operators to intuitively monitor the internal paper transport process, ensuring the transparency of the paper transfer process, and facilitating the rapid lowering of the moving seat after confirming that the transport task is completed, showing a high degree of functional integration and operational convenience;

[0028] In the optimized design, when the rotation of the support rod drives the insert to perform its insertion action, a mechanical linkage mechanism is constructed between the insert and the drive block. This linkage mechanism enables the insert to actively push the drive block and the connected rack to perform linear displacement, thereby triggering the rotation of the gear, and indirectly driving the rotating screw to rotate synchronously. At the same time, the rotation of the support rod also realizes the effective expansion of the expansion device and ensures the stable fixation of the insert. With the help of the linear propulsion force of the rack, the mechanical efficiency and application range of the support rod are significantly enhanced, and the optimization effect of compact structure and functional integration is achieved.

[0029] With reference to the following description and drawings, a specific embodiment of the present invention is disclosed in detail, indicating the manner in which the principle of the present invention can be adopted. It should be understood that the scope of the embodiment of the present invention is not limited thereby, and the embodiment of the present invention includes many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an automatic feeding device of a printing press;

[0031] Figure 2 It is a structural schematic diagram of the external rack in the present invention;

[0032] Figure 3 It is a structural schematic diagram of the lifting device in the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the expansion device in the present invention;

[0034] Figure 5 It is a schematic structural diagram of the first supporting part in the present invention;

[0035] Figure 6 It is a structural schematic diagram of the driving motor in the present invention;

[0036] Figure 7 is a schematic structural diagram of the first shielding member in the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of the driving component in the present invention;

[0038] Fig. 9It is a schematic diagram of the structure of the gear in the present invention;

[0039] Fig.10 It is a schematic diagram of the structure of the rotating screw in the present invention;

[0040] Fig.11 For the present invention Fig.10 A schematic diagram of the enlarged structure at A in the middle;

[0041] Fig.12 It is a schematic diagram of the structure of the insert in the present invention.

[0042] In the figure: 1. printing machine body; 11. fixing hole; 12. linear hole; 2. external frame; 21. transfer robot; 3. transfer trolley; 31. placement hole; 4. lifting device; 41. lifting screw; 42. moving seat; 43. guide rod; 44. lifting motor; 5. expansion device; 51. support rod; 511. extension part; 512. second threaded section; 513. insert; 514. inclined surface; 52. driving motor; 6. first supporting part; 61. first threaded section; 62. moving block; 63. strip hole; 64. first expansion plate; 7. second supporting part; 71. second expansion plate; 72. supporting plate; 8. first shielding member; 81. linear slide groove; 82. slider; 821. threaded hole; 83. rotating screw; 84. second shielding member; 9. driving assembly; 91. gear; 92. rack; 93. driving block; 95. spring. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0044] It should be noted that when an element is referred to as being "disposed on, provided with" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected, connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. "Fixed connection" means a fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this article. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0046] Please refer to the instruction manual Figure 1-9 The present invention provides a first embodiment of an automatic feeding device for a printing press, the feeding device comprises a printing press body 1, an external frame 2, a transfer trolley 3, a lifting device 4 and an expansion device 5, and the specific structure is as follows:

[0047] Printing machine body 1: an external frame 2 is arranged on its side, and a transfer robot 21 is installed on the top of the external frame 2;

[0048] The external frame 2 is provided with a workbench for the vehicle to enter and exit, and the transfer robot 21 is located between the workbench and the printer body 1 for easy operation;

[0049] It should be noted that the transfer robot 21 is usually driven by a sprocket chain or a gear rack structure to move linearly, and is driven by a cylinder to perform lifting operations. Since this is common in the prior art, this item will not be described in detail.

[0050] A transfer trolley 3, the upper surface of which is provided with a plurality of placement holes 31, and the top surface is a placement plane for loading the items to be loaded;

[0051] The lifting device 4 includes two lifting screws 41 installed on the workbench. The lifting screws 41 are relatively designed along the moving path of the transfer robot 21 and are powered by a lifting motor 44. Each lifting screw 41 is provided with a moving seat 42 that can move along the straight line, and guide rods 43 are provided on both sides of the moving seat 42 to ensure its stable movement in the vertical direction;

[0052] An expansion device 5, which includes a support rod 51 and a drive motor 52 thereof. The placement hole 31 is located on the moving path of the expansion device 5. The top surfaces of the plurality of support rods 51 together constitute a support plane. The input end of each support rod 51 is connected to the drive motor 52, and a portion of the drive motor 52 extends out of the placement hole 31. A protruding portion 511 extends from the side of the support rod 51 away from the drive motor 52. The protruding portion 511 is also located on the lifting path of the moving seat 42. A first support portion 6 and a second support portion 7 are also provided on the support rod 51, wherein a first threaded section 61 is provided inside the first support portion 6, and a moving block 62 cooperating with the first threaded section 61 is installed on the first threaded section 61. A strip hole 63 is opened on the side of the first support portion 6, and the moving block 62 is hinged with a first expansion plate 64, and a second expansion plate 71 is hinged on the second support portion 7. The first expansion plate 64 and the outer sides of the second expansion plate 71 are hinged to each other, and a support plate 72 is installed at the hinge.

[0053] In actual operation, after the driving motor 52 of the expansion device 5 is started, it drives the support rod 51 to rotate, and the rotational action drives the moving block 62 to move linearly in the first support part 6. As the moving block 62 moves, the first support part 6 and the second support part 7 drive the expansion action, and the expansion action is further transmitted to the support plate 72, causing it to expand accordingly, so that the area of ​​the entire support plane is expanded, thereby significantly increasing the contact area with the paper and effectively improving the support effect.

[0054] The above structure realizes a complete automatic loading process. When the transfer robot 21 performs the action, the transfer cart 3 can perform the transfer operation at the same time, thereby greatly shortening the loading time. The design of the expansion device 5 enables the support rod 51 to have two use states: contraction and expansion, which not only reduces the space occupied, but also reduces the damage to the upper surface of the transfer cart 3. At the same time, by expanding the contact area with the paper, the support effect is effectively improved, and the risk of paper bending and slipping is reduced.

[0055] Please refer to the instruction manual Figure 1-9 The present invention provides a second embodiment of an automatic feeding device for a printing press. The second embodiment is based on the structure of the first embodiment, and further improves the support rod 51 to improve stability. The specific structure is as follows:

[0056] A fixing hole 11 is preset on the printer body 1, and a second threaded section 512 is designed on the extension 511 of the support rod 51. The second threaded section 512 is equipped with an insert 513 matching therewith, and when the support rod 51 is rotated, the insert 513 thereon can move linearly therewith and enter the fixing hole 11, thereby achieving a stable fixing effect.

[0057] Thanks to the structural layout of the first support part 6 and the second support part 7, the support rod 51 can avoid direct contact with the paper. Based on this structure, the rotation of the support rod 51 is endowed with dual functions: first, the rotation of the support rod 51 cooperates with the expansion device 5 to enable the support rod 51 to achieve expansion, thereby enhancing its support effect; second, through the coordinated action with the second threaded section 512, the insert 513 and the fixing hole 11, the support rod 51 can complete the insertion and fixing action, realize the stable fixation of its position, strengthen the fixing efficiency of the support rod 51, and achieve the dual improvement of function and stability.

[0058] Please refer to the instruction manual Figure 1-12 The present invention provides a third embodiment of an automatic feeding device for a printing press. The third embodiment is based on the structure of the second embodiment, and in order to ensure that the side position of the paper remains unchanged during expansion, a shielding structure is added. The specific structure is as follows:

[0059] The shielding structure includes a first shielding member 8, which is located on both sides of the above-mentioned supporting plane and the bottom surface of the shielding member is located on the travel path of the above-mentioned movable seat 42, which not only prevents the movement of paper under the action of the expansion device 5, but also limits the travel path of the movable seat 42, and at the same time, ensures the alignment of the insert 513 and the fixing hole 11.

[0060] In some examples, in order to enhance the shielding effect of the shielding structure, the shielding structure further includes a linear slide groove 81, a slider 82, a threaded hole 821, a rotating screw 83, a driving assembly 9 and a second shielding member 84. Specifically, a linear slide groove 81 is provided on the upper surface of the first shielding member 8, and two sliders 82 that slide relative to or toward each other along the linear slide groove 81 are provided on the linear slide groove 81, and a threaded hole 821 is provided on the slider 82, and a rotating screw 83 is passed through the threaded hole 821, and a driving assembly 9 is provided at the input end of the rotating screw 83, and a hinged rod is hinged on the side of the slider 82, and a second shielding member 84 is hinged on the top surface of the hinged rod, and the second shielding member 84 is a quadrilateral plate-like structure.

[0061] During actual operation, the driving assembly 9 drives the rotating screw 83 to rotate, driving the two sliders 82 to move toward or away from each other. If they move toward each other, the two hinged rods are driven to move in a vertical direction, and the second shielding member 84 is pushed to move in a straight line, thereby significantly expanding the shielding range.

[0062] Furthermore, the above design integrates the second shielding member 84, the slider 82 and the hinged rod, and works in conjunction with the first shielding member 8 to significantly expand the shielding range. Through the cross structure, a plurality of vertical support columns are constructed after the second shielding member 84 is lifted. The wide gaps left between them provide operators with a window for intuitively monitoring the internal paper handling process, ensuring the transparency of the paper transfer process and facilitating the rapid lowering of the moving seat 42 after confirmation of completion of the handling task, demonstrating a high degree of functional integration and operational convenience.

[0063] Based on the above structure, the rotation of the rotating screw 83 has two driving modes, the specific conditions are as follows:

[0064] The first is electric drive, wherein the drive assembly 9 is an electric motor, and the rotating screw 83 is driven to rotate by the electric motor;

[0065] The second type is a mechanical linkage structure, in which the driving assembly 9 includes a gear 91, a rack 92, a driving block 93 and an insert 513. The gear 91 is connected to the rotating screw 83, and a rack 92 meshing with the gear 91 is provided below the gear 91. A straight hole 12 is provided on the side of the fixing hole 11 to limit the linear movement of the rack 92. A driving block 93 is provided at one end of the rack 92. An inclined surface 514 is provided on the insert 513 and the driving block 93 is located on the travel path of the inclined surface 514. In the optimized design, when the support rod 51 rotates to drive the insert 513 to perform its insertion action, a mechanical linkage mechanism is constructed between the insert 513 and the driving block 93. This linkage mechanism enables the insert 513 to actively push the drive block 93 and the connected rack 92 to perform linear displacement, thereby triggering the rotational movement of the gear 91, indirectly driving the rotating screw 83 to rotate synchronously. At the same time, the rotational movement of the above-mentioned support rod 51 also realizes the effective expansion of the expansion device 5 and ensures the firm fixation of the insert 513. With the help of the linear propulsion force of the rack 92, the mechanical efficiency and application range of the support rod 51 are significantly enhanced, achieving the optimization effect of compact structure and functional integration.

[0066] As a further optimization of the above scheme, a spring 95 is connected to the side of the rack 92 away from the driving block 93, and one end of the spring 95 is fixed to the inner wall of the linear hole 12. The existence of the spring 95 enables the rack 92 to automatically return to the initial position when no external force is applied, thereby ensuring that the first shielding plate and the second shielding plate remain in a folded state under normal conditions, effectively realizing space saving. At the same time, the spring 95 provides the necessary buffer force for the rack 92 to prevent it from moving in a straight line quickly, ensuring that the gear 91 connected thereto can rotate slowly and smoothly.

[0067] The present invention also provides an automatic feeding method for a printing press, comprising the following working steps:

[0068] S1. Preparation stage:

[0069] S1-1. Confirm that the printer body 1, the external frame 2, the transfer trolley 3, the lifting device 4 and the expansion device 5 are in normal working condition;

[0070] S1-2. Place the loading items on the transfer cart 3;

[0071] S2. Loading stage:

[0072] S2-1 transfer cart 3 enters the workbench of the external rack 2 and is positioned at a predetermined position;

[0073] S2-2. The lifting motor 44 of the lifting device 4 is started, and the movable seat 42 is driven to rise by the lifting screw 41 until the edge of the movable seat 42 contacts the first shielding member 8;

[0074] S2-3. The movable seat 42 lifts the expansion device 5 and the paper rises on the supporting plane;

[0075] S3. Expansion, fixation and limiting stage:

[0076] S3-1. Expansion process

[0077] The driving motor 52 of the expansion device 5 is started, driving the support rod 51 to rotate. The rotation of the support rod 51 drives the moving block 62 to move linearly in the first support part 6, thereby driving the first support part 6 and the second support part 7 to perform an expansion action. The expansion action is transmitted to the support plate 72, causing it to expand accordingly, thereby expanding the area of ​​the entire support plane, increasing the contact area with the paper, and improving the support effect;

[0078] S3-2. Fixed process

[0079] When the support rod 51 is rotated, the insert 513 thereon moves linearly and enters the fixing hole 11 to achieve a stable fixing effect;

[0080] S3-2. Limiting process

[0081] When the rotation of the support rod 51 is used to drive the insert 513 to perform the insertion action, a mechanical linkage mechanism is constructed between the insert 513 and the drive block 93, which pushes the rack 92 to perform linear displacement, thereby triggering the rotation movement of the gear 91, indirectly driving the rotating screw 83 to rotate synchronously, driving the two sliders 82 to move toward each other, driving the two hinged rods to move in the vertical direction, and pushing the second shielding member 84 to move in a straight line, thereby expanding the shielding range.

[0082] In summary, the present invention integrates the printing machine body 1, the external frame 2, the transfer trolley 3, the lifting device 4 and the expansion device 5 to realize the complete process of automatic loading. During the period when the transfer robot 21 performs the transfer action, the transfer trolley 3 is in an idle state and can perform the transfer operation, which significantly shortens the loading time. In addition, the design of the expansion device 5 enables the support rod 51 to have two use states. The support rod 51 in the contracted use state occupies less space before expansion, and the damage to the upper surface of the transfer trolley 3 is reduced. Considering that the transfer robot 21 mostly adopts a suction cup structure, it is usually accompanied by a downward pressure action when sucking paper. If the gap between two adjacent support rods 51 is too large, it may cause part of the lifted paper to bend, or even part of the paper to fall off from the gap. The expansion device 5 expands the contact area between the support rod 51 and the paper, so that the support rod 51 is in an expanded use state, effectively improving the support effect, and also reduces the gap between the two adjacent support rods 51, thereby reducing the bending phenomenon of paper and the potential risk of paper slipping.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic feeding device for a printing press, characterized in that: The printing machine comprises a printing machine body (1), an external frame (2) is provided on the side of the printing machine body (1), a transfer robot (21) is provided on the top of the external frame (2), a workbench for a transfer trolley (3) to enter is provided on the external frame (2), and a plurality of placement holes (31) are provided on the upper surface of the transfer trolley (3); The placement hole (31) is located on the moving path of the expansion device (5), the lifting device (4) provides power for the expansion device (5) and drives the expansion device (5) to move up and down, and the top surface of the expansion device (5) forms a support plane for placing the printing press raw material; The lifting device (4) comprises a lifting screw (41), a moving seat (42) and a guide rod (43) mounted on a workbench. The number of the lifting screws (41) is two and they are arranged relative to each other along the moving path of the transfer robot (21). The lifting motor (44) provides power for the lifting screw (41). The lifting screw (41) is provided with a moving seat (42) that moves linearly along the lifting screw (41). Guide rods (43) that guide the moving seat (42) to move linearly in a vertical direction are provided on both sides of the moving seat (42). First shielding members (8) are provided on both sides of the support plane; The first shielding member (8) is located on the travel path of the movable seat (42); The expansion device (5) comprises a support rod (51) and a driving motor (52) for driving the support rod (51) to rotate; a support rod (51) which is a matching structure with the placement hole (31) is placed in the placement hole (31); a support plane is formed by the top surfaces of a plurality of support rods (51); an input end of the support rod (51) is connected to a driving motor (52) and a portion of the driving motor (52) extends out of the placement hole (31); the driving motor (52) is located on a lifting path of the moving seat (42); a side of the support rod (51) facing away from the driving motor (52) extends outwardly to form a protruding portion (511) that protrudes out of the placement hole (31); the protruding portion (511) is located at the lifting path of the moving seat (42) On the path, the support rod (51) is also provided with a first support portion (6) and a second support portion (7); the portion of the support rod (51) located inside the first support portion (6) is also provided with a first threaded section (61); the first threaded section (61) is provided with a moving block (62) which is a matching structure with the first threaded section (61); a strip hole (63) is provided on the side of the first support portion (6); a first expansion plate (64) is hingedly connected to the moving block (62); a second expansion plate (71) is hingedly connected to the second support portion (7); the first expansion plate (64) is hingedly connected to the outer side of the second expansion plate (71); and a support plate (72) is provided at the hinge between the first expansion plate (64) and the second expansion plate (71); The protruding portion (511) is provided with a second thread segment (512), the second thread segment (512) is provided with an insert (513) that is a matching structure with the second thread segment (512), and the printer body (1) is provided with a fixing hole (11) for the insert (513) to enter; The upper surface of the first shielding member (8) is provided with a linear slide groove (81), the linear slide groove (81) is provided with two slide blocks (82) that slide relative to or towards each other along the linear slide groove (81), the slide blocks (82) are provided with threaded holes (821), a rotating screw rod (83) is inserted into the threaded hole (821), and a driving assembly (9) is provided at the input end of the rotating screw rod (83), a hinged rod is hinged on the side of the slide block (82), and a second shielding member (84) is hinged on the top surface of the hinged rod; The second shielding member (84) is a quadrilateral plate-shaped structure; The driving component (9) is an electric motor; The driving assembly (9) comprises a gear (91), a rack (92), a driving block (93) and an insert (513); the gear (91) is connected to the rotating screw (83); a rack (92) meshing with the gear (91) is provided below the gear (91); a linear hole (12) for limiting the linear movement of the rack (92) is provided on the side of the fixing hole (11); a driving block (93) is provided at one end of the rack (92); an inclined surface (514) is provided on the insert (513) and the driving block (93) is located on the travel path of the inclined surface (514).

2. The automatic feeding device of a printing press according to claim 1, characterized in that: A spring (95) is connected to the side of the rack (92) facing away from the driving block (93), and one end of the spring (95) is fixed on the inner wall of the linear hole (12).

3. An automatic feeding method for a printing press, characterized in that: The automatic loading method of the printing press uses the automatic loading device of the printing press as claimed in claim 1 or claim 2.

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