Plate cylinder transmission device of offset press

Abstract

The utility model discloses a plate cylinder transmission device of an offset press, which comprises a left side plate, a right side plate and a plate cylinder, the plate cylinder is arranged between the left side plate and the right side plate, the left side plate and the right side plate are respectively provided with a shaft sleeve, one shaft sleeve is provided with a telescopic pressing shaft, and the other shaft sleeve is provided with a rotatable rotating shaft. The right side plate is provided with a pushing and pressing air cylinder corresponding to the pressing shaft, the pushing and pressing air cylinder is in transmission connection with the pressing shaft through a rotating transmission piece, the left side plate is provided with a transmission adjusting device corresponding to the rotating shaft, pressing blocks with conical peripheral walls are arranged at one end of the pressing shaft and one end of the rotating shaft respectively, and pressing grooves matched with the pressing blocks are formed in the two ends of the plate cylinder respectively. The pressing groove in one side of the plate cylinder abuts against the pressing block of the rotating shaft, and the pressing shaft is pressed into the pressing groove in the other side of the plate cylinder under driving of the air cylinder. Therefore, the technical effects of quick installation and reliable transmission are achieved.

Description

Technical Field

[0001] The utility model relates to the field of printing, in particular to a plate cylinder transmission device of an offset printing machine. Background Art

[0002] An offset printing press is a type of lithographic printing press. During printing, the printed image is first printed from the plate cylinder onto the rubber cylinder, and then transferred to the paper by the rubber cylinder.

[0003] Therefore, the plate cylinder is the most critical component in the offset printing machine. The plate cylinder needs to be replaced accordingly according to the required printing images and texts. When replacing, the two ends of the plate cylinder need to be fixedly connected to the output shaft of the motor. After replacement, the plate cylinder needs to be manually rotated to adjust the plate so that it can be registered according to the input paper position (that is, the position of the printed pattern printed on the paper is adjusted). The adjustment process requires manual rotation of the plate roller for repeated debugging, which is very cumbersome. At the same time, the plate cylinder cannot be installed effectively and quickly during the rotation and installation process, and the rotation of the plate cylinder will be accompanied by jumping, which greatly affects the printing efficiency and the reliability of the printed images and texts. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a plate cylinder transmission device for an offset printing press which can be quickly installed and has reliable transmission.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plate cylinder transmission device of an offset printing press, comprising a left side plate, a right side plate and a plate cylinder, the plate cylinder is installed between the left and right side plates, the left and right side plates are respectively provided with shaft sleeves, one of which is provided with a retractable pressing shaft, and the other shaft sleeve is provided with a rotatable rotating shaft, the right side plate is provided with a pushing cylinder corresponding to the pressing shaft, the pushing cylinder is connected to the pressing shaft through a rotating transmission member, and the left side plate is provided with a transmission adjustment device corresponding to the rotating shaft A pressure block with a tapered circumferential wall is respectively arranged at one end of the pressure shaft and one end of the rotating shaft, and pressure grooves matched with the pressure blocks are respectively arranged at both ends of the printing plate cylinder, and the pressure groove on one side of the printing plate cylinder abuts on the pressure block of the rotating shaft, and the pressure shaft is pressed into the pressure groove on the other side of the printing plate cylinder under the drive of the cylinder, and support plates are respectively installed on the left and right side plates, and guide rails are arranged on the support plates, and a sliding plate sliding along the guide rail is arranged on the guide rail, and two rollers are arranged on the sliding plate, and the two rollers abut under the printing plate cylinder.

[0006] The transmission adjustment device includes a servo motor mounted on the left side plate, a first gear is arranged on the rotating shaft of the servo motor, a second gear is arranged on the rotating shaft, the first gear and the second magnetic wheel are meshed for transmission, a transmission rod is mounted on the left side plate, a first sector gear is arranged at the end of the transmission rod, an adjustment rod is also mounted on the left side plate, a second sector gear is arranged at the end position of the adjustment rod, the first sector gear and the second sector gear are meshed for transmission, a knob is also arranged at the end of the adjustment rod, an adjustment transmission shaft is connected to the rotating shaft via a one-way bearing, and the adjustment transmission shaft is transmission-connected to the transmission rod.

[0007] The beneficial effect of the utility model is that the printing plate cylinder can be more conveniently pressed between the pressing shaft and the rotating shaft by the pushing cylinder, so that quick installation can be achieved; the two rollers arranged under the printing plate cylinder can effectively maintain the stable rotation of the printing plate cylinder, and the transmission adjustment device can drive the printing plate cylinder to rotate, and at the same time, the rotation of the printing plate cylinder is adjusted during plate registration, thus achieving the technical effect of quick installation and reliable transmission.

[0008] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A three-dimensional diagram of a specific embodiment of the utility model Figure 1 ;

[0010] Figure 2 A three-dimensional diagram of a specific embodiment of the utility model Figure 2 ;

[0011] Figure 3 It is a cross-sectional view of a specific implementation mode of the utility model;

[0012] Figure 4 for Figure 3 A is an enlarged view of the middle image. DETAILED DESCRIPTION

[0013] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0014] like Figure 1 — Figure 3As shown, the present embodiment discloses a plate cylinder transmission device of an offset printing press, comprising a left side plate 1, a right side plate 2 and a plate cylinder 3, the plate cylinder 3 is installed between the left and right side plates, the left and right side plates are respectively provided with shaft sleeves, one of which is provided with a retractable pressing shaft 4, and the other shaft sleeve is provided with a rotatable rotating shaft 5, the right side plate 2 is provided with a pushing cylinder 6 corresponding to the pressing shaft 4, the pushing cylinder 6 is connected to the pressing shaft 4 through a rotating transmission member 10, the main structure of the rotating transmission member is a common bearing and a connecting seat for the bearing to be installed, one end of the connecting seat is connected to the push rod of the pushing cylinder 6, the outer tube of the common bearing is connected to the pressing shaft through a sleeve pipe, so as to realize the connection between the pressing shaft 4 and the pushing cylinder 6 which can rotate freely with each other, the left side plate 1 is provided with a The transmission adjustment device 7 is provided with a pressure block with a tapered circumferential wall at one end of the pressure shaft 4 and one end of the rotating shaft 5, respectively. Pressure grooves matching the pressure blocks are provided at both ends of the plate cylinder 3, and the transmission pressure groove on one side of the plate cylinder 3 abuts on the pressure block of the rotating shaft 5. The pressure shaft 4 is pressed into the pressure groove on the other side of the plate cylinder 3 under the drive of the cylinder. The contact surface between the pressure block and the transmission pressure groove can be matched through a concave-convex structure. Support plates 8 are also installed on the left and right side plates, respectively. Guide rails are provided on the support plate 8. A sliding plate sliding along the guide rail is arranged on the guide rail, and the sliding plate can be connected to the piston rod of a pneumatic cylinder to realize the extension and retraction of the sliding plate along the guide rail. Two rollers 9 are provided on the sliding plate, and the two rollers 9 abut on the bottom of the plate cylinder 3, so that the rotation of the plate cylinder 3 can be more stable and reliable.

[0015] Specific as Figure 4 As shown, the transmission adjustment device 7 includes a servo motor 71 mounted on the left side plate 1, a first gear 72 is arranged on the rotating shaft of the servo motor 71, a second gear 73 is arranged on the rotating shaft 5, the first gear 72 and the second magnetic wheel are meshed for transmission, a transmission rod 74 is mounted on the left side plate 1, a first sector gear 75 is arranged at the end of the transmission rod 74, an adjustment rod 76 is also mounted on the left side plate 1, a second sector gear 77 is arranged at the end position of the adjustment rod 76, the first sector gear 75 and the second sector gear 77 are meshed for transmission, so that the rotating shaft of the servo motor 71 is connected to the plate cylinder 3 through the gear, a knob is also arranged at the end of the adjustment rod 76, a bearing 78 is also arranged at the end of the transmission rod 74, an adjusting transmission shaft 79 is connected to the rotating shaft 5 through a one-way bearing 80, and the adjusting transmission shaft 79 is connected to the transmission rod 74 for transmission, so that when the plate cylinder 3 rotates forward, the transmission rod 74 and the adjusting transmission shaft 79 will not be driven to rotate. Through this structure, the printing plate cylinder 3 can be driven and its rotation can be adjusted. During adjustment, the printing plate cylinder 3 is driven to rotate in the opposite direction by rotating the knob, so that the plate registration adjustment can be achieved, making the layout printed on the paper more regular.

[0016] By adopting the above technical scheme, the plate cylinder 3 can be more conveniently pressed between the pressure shaft 4 and the rotating shaft 5 by pushing the air cylinder 6, so that quick installation can be achieved. The two rollers 9 arranged under the plate cylinder 3 can effectively maintain the stable rotation of the plate cylinder 3, and the transmission adjustment device 7 can drive the plate cylinder 3 to rotate, and at the same time, the plate cylinder 3 can be rotated and adjusted during the plate registration, thereby achieving the technical effect of quick installation and reliable transmission.

[0017] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0018] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plate cylinder transmission device of an offset printing press, comprising a left side plate, a right side plate and a plate cylinder, wherein the plate cylinder is installed between the left and right side plates, and is characterized in that: The left and right side plates are respectively provided with shaft sleeves, one of which is provided with a retractable pressure shaft, and the other is provided with a rotatable rotating shaft. The right side plate is provided with a pushing cylinder corresponding to the pressure shaft, and the pushing cylinder is connected to the pressure shaft through a rotating transmission member. The left side plate is provided with a transmission adjustment device corresponding to the rotating shaft. Pressure blocks with conical peripheral walls are respectively provided at one end of the pressure shaft and one end of the rotating shaft. Pressure grooves matching the pressure blocks are respectively provided at both ends of the printing plate cylinder. The pressure groove on one side of the printing plate cylinder abuts on the pressure block of the rotating shaft. The pressure shaft is pressed into the pressure groove on the other side of the printing plate cylinder under the drive of the cylinder. Support plates are also respectively installed on the left and right side plates, and guide rails are provided on the support plates. A slide plate sliding along the guide rail is provided on the guide rail, and two rollers are provided on the slide plate, and the two rollers abut under the printing plate cylinder.

2. The plate cylinder transmission device of the offset printing press according to claim 1, characterized in that: The transmission adjustment device includes a servo motor mounted on the left side plate, a first gear is arranged on the rotating shaft of the servo motor, a second gear is arranged on the rotating shaft, the first gear and the second magnetic wheel are meshed for transmission, a transmission rod is mounted on the left side plate, a first sector gear is arranged at the end of the transmission rod, an adjustment rod is also mounted on the left side plate, a second sector gear is arranged at the end position of the adjustment rod, the first sector gear and the second sector gear are meshed for transmission, a knob is also arranged at the end of the adjustment rod, an adjustment transmission shaft is connected to the rotating shaft via a one-way bearing, and the adjustment transmission shaft is transmission-connected to the transmission rod.

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