A positioning structure for a printing press

Abstract

This utility model discloses a positioning structure for a printing press, relating to the field of positioning structure technology. The positioning structure for a printing press includes: two rods, each telescopically mounted in a symmetrically opened opening on the printing table; and a central auxiliary limiting rod, telescopically mounted in a symmetrically opened opening on the printing table. This utility model uses the two rods to limit the 90° corners of the printed part, combined with the central auxiliary limiting rod to limit the two sides of the middle of the printed part, forming a three-dimensional limiting zone. This comprehensively constrains the position of the printed part from the corner to the middle, preventing displacement due to vibration or external force during printing, and solving the problem of easy displacement caused by traditional positioning relying solely on corner limiting. Furthermore, the 45° inclined groove on the limiting surface generates a slight downward pulling force on the printed part when the rods retract, reducing the hard separation of the printed part from the limiting surface and preventing positional displacement due to instantaneous detachment. Simultaneously, the inclined groove design reduces the contact area, lowering the risk of scratching.

Description

Technical Field

[0001] This utility model belongs to the field of positioning structure technology, specifically, it relates to a positioning structure for a printing press. Background Technology

[0002] In the field of circuit board printing, precise positioning of printed parts (i.e., circuit boards) is a core element in ensuring printing quality, directly affecting the registration accuracy of circuit patterns, the alignment accuracy of solder pads, and the reliability of subsequent assembly. Currently, circuit board printing equipment generally adopts a positioning method that uses positioning pins in conjunction with the printing table. The positioning pins limit the corners or edges of the circuit board, preventing serious quality problems such as short circuits, open circuits, or pattern distortion caused by workpiece displacement during the printing process.

[0003] However, existing positioning pin structures have revealed many specific technical defects in circuit board printing scenarios. Traditional positioning pins often have right-angled sharp-edge grooves, and the groove openings lack guiding structures. When aligning the circuit board with the positioning pin, operators need to repeatedly fine-tune the workpiece angle and position to ensure that the corners are accurately embedded in the groove. This not only prolongs the positioning time of a single circuit board and reduces the efficiency of mass production, but also easily leads to misalignment between the circuit pattern and the circuit board substrate due to manual alignment deviations, which in turn causes a chain of quality problems in subsequent etching, soldering and other processes. Therefore, a positioning structure for printing machines is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a positioning structure for a printing press that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a positioning structure for a printing machine, comprising: two rods, which are telescopically disposed in symmetrical openings on the printing table; a central auxiliary limiting rod, which is telescopically disposed in symmetrical openings on the printing table, wherein the central auxiliary limiting rod has a flat portion, and the rods and the central auxiliary limiting rod form a limiting area; the rods have two limiting surfaces with an included angle of 90° along their axis; a protective portion is disposed on the rods to make the limiting surfaces and the outer surface of the rods form a continuous transition; and a connecting frame is connected to the rods and the central auxiliary limiting rod.

[0006] Preferably, it also includes a driving component. The connecting frame is disposed below the printing table, and the driving component is connected to the connecting frame to drive the connecting frame to move up and down.

[0007] Furthermore, the connecting frame is equipped with multiple mounting plates, each with a polygonal hole. A polygonal rod is inserted into the polygonal hole, and the cross-section of the polygonal rod is the same as that of the polygonal hole. A limit plate and a bearing block are fixedly connected to the polygonal rod, and the rod and the central auxiliary limit rod are respectively installed on the bearing block.

[0008] Furthermore, it also includes bolts, a bracket is fixedly connected to the bottom surface of the mounting plate, a threaded hole is opened at the bottom of the polygonal rod, and the bolt passes through the bracket and is threadedly connected to the threaded hole.

[0009] Preferably, the protective part includes a guide fillet that is continuously formed between the outer surface and the limiting surface.

[0010] Preferably, the protective part includes a guide fillet that is continuously formed between the outer surface and the limiting surface, and an avoidance groove is provided at the center of the rod along the axis to reduce the width of the limiting surface.

[0011] Preferably, the protective part includes a guide fillet continuously formed between the outer surface and the limiting surface, an avoidance groove is provided at the center of the rod along the axis, and a guide slope is continuously formed between the limiting surface and the guide fillet.

[0012] Preferably, the bottom of the rod extends to the top of the rod and is provided with a bearing surface.

[0013] Furthermore, the limiting surface is provided with inclined grooves at equal intervals, and one end of the inclined groove is inclined toward the axis of the rod.

[0014] Preferably, a sliding sleeve is installed on the connecting frame, and a guide rod is slidably connected in the sliding sleeve. The top end of the guide rod is installed on the bottom of the printing table through a mounting base.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] 1. The positioning mechanism of this printing press uses two rods to limit the corners of the printed parts at 90°, and an auxiliary limiting rod in the middle to limit the two sides of the middle of the printed parts, forming a three-dimensional limiting zone. This fully constrains the position of the printed parts from the corners to the middle, preventing displacement caused by vibration or external force during the printing process, and solving the problem of easy displacement caused by traditional positioning that only relies on corner limiting.

[0017] 2. The positioning mechanism of this printing press, with the rectangular cross-section of the multi-faceted rod and the multi-faceted hole, prevents the rod and the middle auxiliary limiting rod from rotating during movement or positioning. This ensures that the 90° included angle of the limiting surface and the relative orientation of the plane of the middle auxiliary limiting rod are always accurate, avoiding positioning failure due to angular deviation.

[0018] 3. The positioning joint of this printing press has a 45° inclined groove on the limiting surface. When the rod retracts, it generates a slight downward pulling force on the printed part, reducing the hard separation of the printed part from the limiting surface and avoiding positional displacement caused by instantaneous separation. At the same time, the inclined groove design reduces the contact area and reduces the risk of scratching.

[0019] 4. The positioning joint of this printing machine has a bearing surface that protrudes 1-2mm from the printing table surface. When the printed part is placed, one end is suspended in the air. When it retracts, it moves down with the rod to achieve a smooth landing on the table, improving the accuracy of the alignment. When picking up the part, the bearing surface lifts one end of the printed part, which is convenient for manual or mechanical picking and placing, and optimizes the operating experience.

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 This is a three-dimensional structural diagram of a positioning structure for a printing machine proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the printing table, opening one, and opening two of the positioning structure of a printing machine proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the connecting frame of the positioning structure of a printing machine proposed in this utility model;

[0025] Figure 4 This is a top view of a positioning structure for a printing machine according to the present invention.

[0026] Figure 5 This is a schematic diagram of the multi-faceted hole, multi-faceted rod, and bolt of the positioning structure of a printing machine proposed in this utility model;

[0027] Figure 6 This is a schematic diagram of the threaded hole, bracket, and bolt of the positioning structure of a printing machine proposed in this utility model;

[0028] Figure 7 This is a schematic diagram of the inclined groove, guide slope, and guide fillet of the positioning structure of a printing machine proposed in this utility model;

[0029] Figure 8 This is a schematic diagram of the limiting surface of a positioning structure for a printing machine according to the present invention.

[0030] Figure 9 This is a schematic diagram of the guide fillet of the positioning structure of a printing machine proposed in this utility model;

[0031] Figure 10This is a schematic diagram of the clearance groove in the positioning structure of a printing machine proposed in this utility model;

[0032] Figure 11 This is a schematic diagram of the guide slope of a positioning structure for a printing machine proposed in this utility model;

[0033] Figure 12 This is a schematic diagram of the bearing surface of the positioning structure of a printing machine proposed in this utility model;

[0034] Figure 13 This is a schematic diagram of the bearing surface, guide fillet, and limiting surface of the positioning structure of a printing machine proposed in this utility model;

[0035] Figure 14 This is a schematic diagram of the bearing surface, guide fillet, limiting surface, and clearance groove of the positioning structure of a printing machine proposed in this utility model;

[0036] Figure 15 This is a schematic diagram of the bearing surface, guide fillet, limiting surface, clearance groove, and guide slope of the positioning structure of a printing machine proposed in this utility model;

[0037] Figure 16 This is a schematic diagram of the inclined groove and limiting surface of the positioning structure of a printing machine proposed in this utility model.

[0038] In the diagram: 1. Connecting frame; 11. Mounting plate; 111. Multi-faceted hole; 112. Bracket; 113. Bolt; 12. Multi-faceted rod; 121. Limiting plate; 122. Bearing block; 123. Threaded hole; 13. Guide rod; 131. Mounting base; 132. Sliding sleeve; 14. Driving component; 15. Printing table; 151. Opening one; 152. Opening two

[0039] 2. Rod; 20. Bearing surface; 200. Outer surface; 21. Limiting surface; 22. Guide fillet; 23. Circumferential groove; 24. Guide ramp; 25. Inclined groove;

[0040] 3. Middle auxiliary limit rod; 31. Flat part. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0042] Example: Refer to Figures 1-16A positioning structure for a printing press mainly consists of rods 2, central auxiliary limiting rods 3, connecting frame 1, driving component 14, and protective component. Two rods 2 are telescopically mounted in symmetrical openings 151 on the printing table 15. The central auxiliary limiting rods 3 are telescopically mounted in symmetrical openings 152 on the printing table 15. Each central auxiliary limiting rod 3 has a flat portion 31 along its axis. The flat portions 31 of the two central auxiliary limiting rods 3 are positioned opposite each other, forming a limiting area with the rods 2 and the central auxiliary limiting rods 3. This area is used to limit the position of two corners on one side of the printed piece and the two sides of the middle of the printed piece in multiple directions.

[0043] The rod 2 has two limiting surfaces 21 with an included angle of 90° along its axis. These two limiting surfaces 21 cooperate with each other to precisely limit the corners of the circuit board. The rod 2 is provided with a protective part to make the limiting surfaces 21 and the outer surface 200 of the rod 2 form a continuous transition, so as to facilitate the placement of the printed parts into the limiting area between the two limiting surfaces 21. At the same time, the protective part can also prevent scratch damage to the edges of the printed parts.

[0044] The protective section has multiple implementation methods:

[0045] The first implementation method, as described below Figure 9 The protective part includes a guide fillet 22 continuously formed between the outer surface 200 and the limiting surface 21. The guide fillet 22 can smooth the sharp right-angle edge between the outer surface 200 and the limiting surface 21, which can prevent the sharp right-angle edge from contacting and rubbing against the printed part when positioning and placing the printed part, so that the printed part can be smoothly placed between the two limiting surfaces 21. At the same time, it can also effectively prevent the sharp right-angle edge from wearing down the edge of the printed part.

[0046] The second implementation method, refer to... Figure 10 Based on the guide fillet 22, a clearance groove 23 is provided along the axis at the center of the rod 2, which reduces the width of the limiting surface 21. The clearance groove 23 can provide clearance space for the protruding part at the corner of the circuit board, improving the adaptability of positioning. At the same time, compared with the width of the limiting surface 21 in the first embodiment, the width of the limiting surface 21 in this embodiment is reduced, which can reduce the contact area with the printed part when the rod 2 retracts into the printing table 15, thereby reducing the shaking of the printed part when the rod 2 retracts, and further improving the stability of the printed part after positioning.

[0047] The third implementation method, refer to Figure 11 Based on the guide fillet 22 and the clearance groove 23, a guide slope 24 is continuously formed between the limiting surface 21 and the guide fillet 22. When the printed part is placed between the two limiting surfaces 21 from top to bottom, the guide slope 24 can guide the printed part to be quickly and accurately embedded into the limiting area formed by the limiting surface 21.

[0048] The connecting frame 1, constructed from welded square steel or aluminum profiles, is positioned below the printing table 15 and connects the rod 2 and the central auxiliary limiting rod 3. Multiple mounting plates 11 are mounted on the connecting frame 1, each with polygonal holes 111 into which polygonal rods 12 are inserted. The cross-section of the polygonal rods 12 is identical to that of the polygonal holes 111. This structure prevents the polygonal rods 12 from rotating within the polygonal holes 111, ensuring accurate positioning of the rod 2 and the central auxiliary limiting rod 3. Both the polygonal rods 12 and the polygonal holes 111 are rectangular. A limiting plate 121 and a bearing block 122 are fixedly connected to the polygonal rods 12. The rod 2 and the central auxiliary limiting rod 3 are mounted on the bearing block 122. The limiting plate 121 restricts the depth of the polygonal rods 12 inserted into the polygonal holes 111 and ensures that the rod 2 and the central auxiliary limiting rod 3 have the same height. A bracket 112 is fixedly connected to the bottom surface of the mounting plate 11. A threaded hole 123 is opened at the bottom of the polygonal rod 12. A bolt 113 passes through the bracket 112 and is threaded into the threaded hole 123. By tightening the bolt 113, the polygonal rod 12 can be fixed on the mounting plate 11, which facilitates installation and disassembly.

[0049] The driving component 14 is connected to the connecting frame 1 and is used to drive the connecting frame 1 to move up and down. This, in turn, drives the rod 2 and the middle auxiliary limiting rod 3 to extend and retract within the opening 151 and the second opening 152, achieving positioning and retraction actions. The driving component 14 is a device capable of linear reciprocating, such as a cylinder, hydraulic rod, or electric push rod. In this embodiment, a cylinder is preferred because it is low-cost and easy to use. The cylinder is installed on the printing press. The cylinder is electrically connected to the printing press. When the printing press prints the workpiece, it provides a corresponding electrical signal. At this time, the cylinder drives the connecting frame 1 to move away from the printing table 15, thereby causing the rod 2 and the middle auxiliary limiting rod 3 to retract into the opening 151 and the second opening 152, preventing them from protruding from the printing table 15 and affecting the printing of the workpiece.

[0050] A sliding sleeve 132 is installed on the connecting frame 1, and a guide rod 13 is slidably connected in the sliding sleeve 132. The top end of the guide rod 13 is installed on the bottom of the printing table 15 through the mounting base 131. During the lifting and lowering process of the connecting frame 1 driven by the driving component 14, the cooperation between the guide rod 13 and the sliding sleeve 132 can ensure the smooth movement of the connecting frame 1 and prevent the rod 2 and the middle auxiliary limit rod 3 from shifting. It should be understood that the guide rod 13 has a certain length to meet the required distance between the connecting frame 1 and the bottom surface of the printing table 15 when the rod 2 and the middle auxiliary limit rod 3 need to be replaced or installed.

[0051] In some embodiments, refer to Figures 12-15The bottom of the rod 2 extends to the top of the rod 2 and is provided with a bearing surface 20. In use, the bearing surface 20 protrudes 1-2mm from the surface of the printing table 15. When the printed part is placed on the bearing surface 20 of the rod 2, one end of it does not contact the surface of the printing table 15. This allows one end of the printed part to move down when the rod 2 retracts. This downward movement allows the printed part to be placed more stably on the printing table 15, improving the accuracy of the printing part alignment.

[0052] In some embodiments, refer to Figure 5 , Figure 6 , Figure 7 , Figure 16 The limiting surface 21 is provided with equally spaced inclined grooves 25. One end of the inclined groove 25 is inclined towards the axis of the rod 2. The angle between the inclined groove 25 and the top or bottom surface of the rod 2 is 45 degrees. When the printed part is placed between the two limiting surfaces 21 on the rod 2, the inclined angle design of the inclined groove 25 can make the printed part have a slight downward pulling force when the rod 2 retracts. This can reduce the contact between the edge of the printed part and the limiting surface 21 after the rod 2 retracts completely into the opening 151, thus reducing the positional displacement of the printed part caused by the retraction of the rod 2, thereby improving the positioning effect of the printed part. The groove width of the inclined groove 25 is 2-3mm and covers the limiting surface 21.

[0053] When in use, the drive component 14 drives the connecting frame 1 to rise, and the connecting frame 1 drives the rod 2 and the middle auxiliary limit rod 3 to rise synchronously, so that the rod 2 and the middle auxiliary limit rod 3 extend out of the surface of the printing table 15. At this time, the two limiting surfaces 21 of the rod 2 form a 90° positioning area, and the flat part 31 of the middle auxiliary limit rod 3 cooperates with the rod 2 to form a complete limiting area.

[0054] When the printing operation begins, the drive component 14 drives the connecting frame 1 to descend. The connecting frame 1 then drives the rod 2 and the central auxiliary limit rod 3 to descend synchronously, causing them to retract below the surface of the printing table 15. This prevents interference with the printing head during the printing process and ensures the smooth progress of the printing operation.

[0055] After the printing operation is completed, the operator removes the printed part, and the drive unit 14 drives the connecting frame 1 to rise again. The rod 2 and the middle auxiliary limiting rod 3 extend out of the surface of the printing table 15, waiting for the next positioning operation. Among them, when the rod 2 is provided with a bearing surface 20, the connecting frame 1 can be raised first, and one end of the printed part can be tilted up through the bearing surface 20, which makes it easier to remove the printed part from the printing table 15.

[0056] By adjusting the extension and retraction length of the cylinder in the drive component 14, the height of the rod 2 and the middle auxiliary limit rod 3 extending out of the surface of the printing table 15 can be adjusted.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A positioning structure of a printing machine, characterized by, include: Two rods (2) are telescopically installed in the symmetrical openings (151) on the printing table (15); The middle auxiliary limiting rod (3) is telescopically installed in the two openings (152) symmetrically opened on the printing table (15). The middle auxiliary limiting rod (3) has a flat part (31). The rod (2) and the middle auxiliary limiting rod (3) form a limiting area. The rod (2) has two limiting surfaces (21) with an included angle of 90° along its axis; A protective part is provided on the rod (2) to make the limiting surface (21) and the outer surface (200) of the rod (2) form a continuous transition; The connecting frame (1) is connected to the rod (2) and the central auxiliary limiting rod (3).

2. A register structure for a printing press according to claim 1, wherein It also includes a drive unit (14), the connecting frame (1) is located below the printing table (15), the drive unit (14) is connected to the connecting frame (1) and is used to drive the connecting frame (1) to move up and down.

3. A register structure for a printing press according to claim 2, wherein Multiple mounting plates (11) are installed on the connecting frame (1). The mounting plates (11) have polygonal holes (111). Polygonal rods (12) are inserted into the polygonal holes (111). The cross section of the polygonal rods (12) is the same as that of the polygonal holes (111). Limiting plates (121) and bearing blocks (122) are fixedly connected to the polygonal rods (12). The rods (2) and the middle auxiliary limiting rods (3) are respectively installed on the bearing blocks (122).

4. A register structure for a printing press according to claim 3, wherein It also includes bolts (113), a bracket (112) is fixedly connected to the bottom surface of the mounting plate (11), a threaded hole (123) is opened at the bottom of the multi-faceted rod (12), and the bolts (113) pass through the bracket (112) and are threadedly connected in the threaded hole (123).

5. The positioning structure of a printing press according to claim 4, characterized in that, The protective part includes a guide fillet (22) that is continuously formed between the outer surface (200) and the limiting surface (21).

6. The positioning structure of a printing press according to claim 4, characterized in that, The protective part includes a guide fillet (22) continuously formed between the outer surface (200) and the limiting surface (21), and an avoidance groove (23) is provided at the center of the rod (2) along the axis to reduce the width of the limiting surface (21).

7. The positioning structure of a printing press according to claim 4, characterized in that, The protective part includes a guide fillet (22) continuously formed between the outer surface (200) and the limiting surface (21), and a relief groove (23) is provided at the center of the rod (2) along the axis. A guide slope (24) is continuously formed between the limiting surface (21) and the guide fillet (22).

8. A positioning structure for a printing press according to claim 5, 6, or 7, characterized in that, The bottom of the rod (2) extends to the top of the rod (2) and is provided with a bearing surface (20).

9. A positioning structure for a printing press according to claim 5, 6, or 7, characterized in that, The limiting surface (21) is provided with inclined grooves (25) at equal intervals, and one end of the inclined groove (25) is inclined toward the axis of the rod (2).

10. The positioning structure of a printing press according to claim 9, characterized in that, A sliding sleeve (132) is installed on the connecting frame (1), and a guide rod (13) is slidably connected in the sliding sleeve (132). The top end of the guide rod (13) is installed at the bottom of the printing table (15) through the mounting base (131).

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