Intermittent ink supply system for printing equipment

Abstract

The utility model relates to an intermittent ink supply system for printing equipment, which comprises an ink fountain, an ink fountain roller, an ink transfer roller and an ink distributing roller, the ink supply system further comprises a driving mechanism, the driving mechanism comprises a driving roller, a connecting rod part and a swinging part, and the connecting rod part is rotatably connected between the end parts of the ink fountain roller and the driving roller; a first guide face and a second guide face which are connected are further formed in the circumferential direction of the driving roller, the swing part is arranged between the ink fountain roller and the ink distributing roller in a rotating mode around a pivot and is provided with a rolling abutting end which abuts against the first guide face or the second guide face in a rolling mode, and the ink transferring roller is rotationally connected to the swing part. On one hand, based on the driving of the same driving roller, the rotating frequency of the ink fountain roller is accurately matched with the swinging frequency of the ink transfer roller, so that stable and constant supply of ink is ensured, and the printing quality is effectively improved; on the other hand, the structure is simple and reliable and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to printing technical field, concretely relates to a kind of intermittent ink supply system for printing equipment. BACKGROUND

[0002] At present, in printing production, the existing ink supply device is mainly through ink fountain roller immersion in ink fountain in ink and rotates to adhere ink to surface, then ink transfer roller moves to contact with ink fountain roller to transfer ink to ink transfer roller surface;Then ink transfer roller moves to contact with ink distributing roller, to drive ink transfer roller surface ink to form thin and uniform ink layer, finally, ink layer is transferred to printing plate, and the feeding of ink is completed.Therefore, ink fountain roller needs to match the movement of ink transfer roller for intermittent rotation, so that ink fountain roller can accurately transfer ink to the surface of ink transfer roller when ink transfer roller contacts ink fountain roller each time.

[0003] However, in actual production process, the rotation of existing ink fountain roller and the movement of ink transfer roller are realized by independent driving mechanism, and under the accumulation of long-term wear and transmission error, the rotation frequency of ink fountain roller and the movement frequency of ink transfer roller are prone to deviation, thereby causing the amount of ink attached to the surface of ink transfer roller to decrease each time, which affects printing quality. SUMMARY

[0004] The utility model solves the technical problems of overcoming the prior art, and provides an improved intermittent ink supply system for printing equipment.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] An intermittent ink supply system for printing equipment includes ink fountain, ink fountain roller, ink transfer roller and ink distributing roller, and the ink supply system further includes driving mechanism, the driving mechanism includes driving roller, connecting rod component and swing component, wherein the connecting rod component is rotationally connected between the ink fountain roller and the end of the driving roller;The circumferential direction of the driving roller is further formed with first guide surface and second guide surface in connection, the swing component is rotationally arranged between the ink fountain roller and the ink distributing roller about pivot, and has rolling contact end that rolls and contacts on the first guide surface or the second guide surface, the ink transfer roller is rotationally connected on the swing component, with the rotation of the driving roller, the connecting rod component drives the ink fountain roller to rotate intermittently in the same direction around its center line, and the swing component is synchronously rotated about the pivot and drives the ink transfer roller to contact with the ink fountain roller and the ink distributing roller in turn.

[0007] Preferably, the connecting rod component comprises a first connecting rod rotatably connected at one end of the driving roller and eccentrically moving around the center line of the driving roller, a second connecting rod rotatably connected at one end with the other end of the first connecting rod, wherein the second connecting rod is rotatably connected at one end of the ink fountain roller and forms a ratchet pawl structure. Here, through the cooperation of the first and second connecting rods and based on the ratchet pawl structure, the ink fountain roller is realized to intermittently rotate in the same direction, and intermittent ink supply is realized, and the structure is simple and convenient for assembly and implementation.

[0008] Preferably, one end of the driving roller is fixedly provided with a cam, wherein the edge of the cam forms a first guide surface and a second guide surface, and the rolling contact end is kept in contact with the first guide surface and / or the second guide surface with an elastic tendency.

[0009] Specifically, one end of the swing component is rotatably connected with a roller and forms a rolling contact end, wherein the center of the roller is connected with an elastic member, and the elastic member drives the roller to keep a tendency of moving close to the cam. Here, the roller is rolled on the edge of the cam by the elastic member, so that the movement is more stable.

[0010] Preferably, when the rolling contact end moves between the first guide surface and the second guide surface, the swing component rotates around the pivot by an angle of 5°-8°. Here, the ink supply efficiency is improved, and stable ink supply is ensured.

[0011] Preferably, the rotation direction of the ink fountain roller is opposite to that of the ink transmission roller.

[0012] Further, the rotation direction of the ink transmission roller is opposite to that of the ink uniformizing roller.

[0013] Preferably, the ink uniformizing roller is arranged to synchronously reciprocate along the axial direction thereof. Here, in the long-term ink uniformizing process, uniform wear of the ink uniformizing roller is ensured to ensure the uniformity of the ink layer thickness.

[0014] Specifically, a spiral groove extending around the center line of the driving roller and in the axial direction thereof is formed on the driving roller, and an auxiliary rod is fixed on the ink uniformizing roller, wherein one end of the auxiliary rod is inserted into the spiral groove, and with the rotation of the driving roller, the auxiliary rod moves along the spiral groove and drives the ink uniformizing roller to reciprocate along the axial direction thereof. Here, the structure is simple and convenient for realizing the linear reciprocating motion of the ink uniformizing roller.

[0015] In addition, the auxiliary rod is arranged to extend along the radial direction of the ink uniformizing roller.

[0016] Due to the implementation of the above technical solutions, the present application has the following advantages compared with the prior art:

[0017] The rotation of the existing ink fountain roller and the movement of the ink transfer roller are respectively achieved by independent driving mechanisms. Due to long-term wear and the accumulation of transmission errors, it is easy to cause a deviation between the rotation frequency of the ink fountain roller and the movement frequency of the ink transfer roller, thereby reducing the amount of ink attached to the surface of the ink transfer roller each time, affecting the printing quality; and the present application comprehensively designs the structure of the intermittent ink supply system for printing equipment, cleverly solving the shortcomings and defects of the existing technology. After adopting this ink supply system, based on the drive of the same driving roller, the ink fountain roller is driven by the connecting rod component to rotate intermittently in the same direction to transfer ink, and at the same time, the ink transfer roller is driven by the swinging component to contact the ink fountain roller and the ink distribution roller in turn, wherein when the ink fountain roller rotates, the swinging component drives the ink transfer roller to contact the ink fountain roller, and when the ink fountain roller stops, the swinging component drives the ink transfer roller to contact the ink distribution roller, thereby completing the ink transfer and the formation of the ink layer. Therefore, compared with the existing technology, the utility model, on the one hand, realizes the precise matching of the rotation frequency of the ink fountain roller and the swing frequency of the ink transfer roller under the drive of the same drive roller, thereby ensuring a stable and constant supply of ink and effectively improving the printing quality; on the other hand, it has a simple and reliable structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic front view of an intermittent ink supply system for a printing device according to this embodiment (the ink transfer roller is in contact with the ink distribution roller);

[0019] Figure 2 for Figure 1 A schematic diagram of a main view after omitting the local structure;

[0020] Figure 3 for Figure 1 A schematic diagram of the main view after the partial structure is omitted (the ink transfer roller is in contact with the ink fountain roller);

[0021] Figure 4 for Figure 3 Schematic diagram of the left side of the middle driving roller (partially omitted);

[0022] Among them: 1. ink fountain; 2. ink fountain roller; 3. ink transfer roller; 4. ink distribution roller; 40. auxiliary rod; 5. driving mechanism; 50. driving roller; 500. spiral groove; t. cam; m1. first guide surface; m2. second guide surface; 51. connecting rod component; 511. first connecting rod; 512. second connecting rod; 52. swinging component; s. pivot; d. rolling contact end; d0. elastic member. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more clear and understandable, the following will describe the present application in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art, that the present application can be practiced without using these specific details. In other instances, well-known methods have not been described in detail in order to avoid obscuring the present application. Therefore, the specific embodiments described herein are not intended to limit the present application, but rather, the present application is to cover all modifications and alternatives arising from the teachings and concepts described herein.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are intended to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0026] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] It is to be understood that when an element such as a layer, film or region is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, although the terms "first", "second", etc. can be used herein to describe various elements, these elements should not be limited by these terms since such elements are commonly known by other terms.

[0029] In combination Figures 1 to 4 As shown in the drawings, the intermittent ink supply system for printing equipment of the present embodiment comprises an ink fountain 1, an ink fountain roller 2, an ink transfer roller 3, an ink distributing roller 4 and a driving mechanism 5.

[0030] Specifically, the ink fountain 1 is used for storing ink and can be any conventional ink fountain; the ink fountain roller 2, the ink transfer roller 3 and the ink distributing roller 4 extend horizontally along the left-right direction, wherein the ink fountain roller 2 is arranged above the ink fountain 1; the ink transfer roller 3 is arranged in front of the ink fountain roller 2, and the ink distributing roller 4 is arranged below and in front of the ink transfer roller 3.

[0031] Meanwhile, the rotation direction of the ink fountain roller 2 is opposite to that of the ink transfer roller 3, and the rotation direction of the ink transfer roller 3 is opposite to that of the ink distributing roller 4.

[0032] In the present embodiment, the driving mechanism 5 comprises a driving roller 50 extending horizontally along the left-right direction and rotating around its center line driven by a motor, a connecting rod component 51 and a swing component 52, wherein the connecting rod component 51 is rotationally connected between the ink fountain roller 2 and the end of the driving roller 50; the circumferential direction of the driving roller 50 further forms a first guide surface m1 and a second guide surface m2 in connection; the swing component 52 is rotationally arranged between the ink fountain roller 2 and the ink distributing roller 4 around a pivot s and has a rolling contact end d rolling against the first guide surface m1 or the second guide surface m2; the ink transfer roller 3 is rotationally connected to the swing component 52; with the rotation of the driving roller 50, the connecting rod component 51 drives the ink fountain roller 2 to rotate intermittently in the same direction around its center line, and the swing component 52 rotates synchronously around the pivot s and drives the ink transfer roller 3 to sequentially contact the ink fountain roller 2 and the ink distributing roller 4, and the swing frequency of the ink transfer roller 3 matches the rotation frequency of the ink fountain roller 2.

[0033] In some specific embodiments, the connecting rod component 51 comprises a first connecting rod 511 rotationally connected at one end to the end of the driving roller 50 and eccentrically moving around the center line of the driving roller 50, and a second connecting rod 512 rotationally connected at one end to the other end of the first connecting rod 511, wherein the second connecting rod 512 is rotationally connected at the other end to the end of the ink fountain roller 2 and forms a ratchet and pawl structure. Here, through the cooperation of the first and second connecting rods and based on the ratchet and pawl structure, the ink fountain roller is realized to rotate intermittently in the same direction, and the intermittent ink supply is realized, which is simple in structure and convenient for assembly and implementation.

[0034] For the convenience of implementation, one end of the driving roller 50 is fixedly provided with a cam t, wherein the edge of the cam t forms a first guide surface m1 and a second guide surface m2, and the rolling contact end d keeps the elastic tendency of contacting the first guide surface m1 and / or the second guide surface m2.

[0035] In some embodiments, one end of the swing part 52 is rotationally connected with a roller and forms the rolling contact end d, wherein the center of the roller is connected with an elastic piece d0, and the elastic piece d0 drives the roller to keep the movement tendency of approaching the cam t, the elastic piece d0 is a conventional spring, and the other end of the elastic piece d0 is fixed on the frame of the printing device. Here, the roller is driven by the elastic piece to roll on the edge of the cam, so that the movement is more stable.

[0036] At the same time, when the rolling contact end d moves between the first guide surface m1 and the second guide surface m2, the swing part 52 rotates around the pivot s at an angle of 5°-8°. Here, the ink supply efficiency is improved, and the stable ink supply is ensured.

[0037] For the further convenience of implementation, the ink roller 4 is arranged to move synchronously and reciprocally along the axial direction of itself. Here, in the long-term ink leveling process, the uniform wear of the ink roller is ensured to ensure the uniformity of the ink layer thickness.

[0038] In some embodiments, a spiral groove 500 extending around the center line of the driving roller 50 and in the axial direction of itself is formed on the driving roller 50, and an auxiliary rod 40 is fixed on the ink roller 4, wherein the auxiliary rod 40 is arranged to extend along the radial direction of the ink roller, and one end of the auxiliary rod 40 is inserted into the spiral groove 500, and with the rotation of the driving roller 50, the auxiliary rod 40 moves along the spiral groove 500 and drives the ink roller 4 to move reciprocally along the axial direction of itself. Here, the structure is simple, and the linear reciprocating movement of the ink roller is easy to realize.

[0039] In summary, after the ink supply system is adopted, under the driving of the same driving roller, the ink fountain roller is driven to rotate in the same direction intermittently by the connecting rod component to transfer the ink, and the ink transfer roller is driven to contact the ink fountain roller and the ink uniformizing roller in turn by the swing component, wherein when the ink fountain roller rotates, the swing component drives the ink transfer roller to contact the ink fountain roller, and when the ink fountain roller stops rotating, the swing component drives the ink transfer roller to contact the ink uniformizing roller, so that the ink transfer and the formation of the ink layer are completed. Therefore, compared with the prior art, on the one hand, under the driving of the same driving roller, the rotation frequency of the ink fountain roller and the swing frequency of the ink transfer roller are accurately matched, so that the ink is stably and constantly supplied, and the printing quality is effectively improved; on the other hand, the structure is simple and reliable, and the operation is convenient; thirdly, through the cooperation of the first and second connecting rods and based on the ratchet and pawl structure, the ink fountain roller is driven to rotate in the same direction intermittently, intermittent ink supply is realized, the structure is simple, and the assembly and implementation are convenient; fourthly, the roller is driven to roll on the edge of the cam by the elastic member, so that the movement is more stable; and fifthly, in the long-term ink uniformizing process, the ink uniformizing roller is ensured to be uniformly worn, so that the uniformity of the ink layer thickness is ensured.

[0040] The utility model has been described in detail above, the purpose is to let the person who knows this field technology can understand the content of the utility model and implement, and cannot limit the protection scope of the utility model with this, all equivalent changes or modifications according to the spirit of the utility model should be covered in the protection scope of the utility model.

Claims

1. An intermittent ink supply system for a printing apparatus, comprising an ink fountain, an ink fountain roller, an ink transfer roller, and an ink-distribution roller, characterized by, The ink supply system further comprises a driving mechanism, the driving mechanism comprises a driving roller, a connecting rod component and a swing component, wherein the connecting rod component is rotationally connected between the end of the ink fountain roller and the end of the driving roller; the circumferential direction of the driving roller further forms a first guide surface and a second guide surface in connection, the swing component is rotationally arranged between the ink fountain roller and the damping roller around a pivot, and has a rolling contact end which rolls and contacts on the first guide surface or the second guide surface, the ink transmission roller is rotationally connected on the swing component, with the rotation of the driving roller, the connecting rod component drives the ink fountain roller to rotate intermittently in the same direction around the center line thereof, and the swing component rotates synchronously around the pivot and drives the ink transmission roller to contact with the ink fountain roller and the damping roller in turn.

2. The intermittent ink supply system for a printing apparatus according to claim 1, characterized by, The connecting rod component comprises a first connecting rod which is rotationally connected at one end of the driving roller and moves eccentrically around the center line of the driving roller, and a second connecting rod which is rotationally connected at one end with the other end of the first connecting rod, wherein the second connecting rod is rotationally connected at the other end with the end of the ink fountain roller and forms a ratchet and pawl structure.

3. The intermittent ink supply system for a printing apparatus according to claim 1, characterized by, One end of the driving roller is fixedly provided with a cam, wherein the edge of the cam forms the first guide surface and the second guide surface, and the rolling contact end has a elastic tendency to keep contacting on the first guide surface and / or the second guide surface.

4. The intermittent ink supply system for a printing apparatus according to claim 3, characterized by One end of the swing component is rotationally connected with a roller and forms the rolling contact end, wherein the center of the roller is connected with an elastic member, and the elastic member drives the roller to keep a tendency to move close to the cam.

5. The intermittent ink supply system for a printing apparatus according to claim 1 or 3 or 4, characterized in that, When the rolling contact end moves between the first guide surface and the second guide surface, the swing component rotates around the pivot by an angle of 5°-8°.

6. The intermittent ink supply system for a printing apparatus according to claim 1, characterized by, The rotation direction of the ink fountain roller is opposite to that of the ink transmission roller.

7. The intermittent ink supply system for a printing apparatus according to claim 6, characterized by The rotation direction of the ink transmission roller is opposite to that of the damping roller.

8. The intermittent ink supply system for a printing apparatus according to claim 1, characterized by, The damping roller is synchronously arranged to reciprocate along the axial direction thereof.

9. The intermittent ink supply system for a printing apparatus according to claim 8, characterized by, The driving roller is formed with a helical groove which extends helically around the center line thereof and in the axial direction thereof, and the damping roller is fixedly provided with an auxiliary rod, wherein one end of the auxiliary rod is inserted into the helical groove, with the rotation of the driving roller, the auxiliary rod moves along the helical groove and drives the damping roller to reciprocate along the axial direction thereof.

10. The intermittent ink supply system for a printing apparatus according to claim 9, characterized by The auxiliary rod is arranged to extend along the radial direction of the damping roller.

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