Double-set-square folding mechanism of ink-jet rotary press

Abstract

The utility model discloses a double set square folding mechanism of an ink-jet rotary press, which comprises a longitudinal folding bracket I and a longitudinal folding bracket II which are arranged on a folding rack, a paper feeding roller is arranged on the longitudinal folding bracket I, a large set square is arranged on the longitudinal folding bracket I and is positioned at the conveying end of the paper feeding roller, and the large set square is used for longitudinally folding paper at one time; a power pulley roller is arranged on the second longitudinal folding support, a small triangular plate is arranged at the position, located at the conveying end of the power pulley roller, of the second longitudinal folding support and used for secondary longitudinal folding of the paper, and a set of second traction rollers are arranged at the position, located below the small triangular plate, of the folding rack. A cutting unit, a book sticker conveying belt and a book sticker collecting wheel are further arranged on the portion, below the second traction roller, of the folding rack. The paper longitudinal folding device has the advantages that two-time longitudinal folding operation of paper can be completed by one device, the processing process of folding the paper into a book is simple and smooth, the book processing efficiency is high, the structure is simple, the cost is low, and the device runs stably and reliably; and the longitudinal folding quality and the longitudinal folding effect of the paper are good.

Description

Technical Field

[0001] This utility model relates to the field of printing folding equipment technology, specifically a double triangular plate folding mechanism for an inkjet rotary printing press. Background Technology

[0002] Folding machines are an important component of roll-to-roll offset printing presses and represent the final crucial step in printing production. When folding the printing tape, the triangular plate serves to perform longitudinal folding or guide the paper when the two halves of the tape are joined together after being cut. In most folding machines, the triangular plate is fixed to the frame, with its center line aligning with the center line of the paper tape to achieve the fold. Typically, only one fixed triangular plate is used for one longitudinal fold. Because the folding position is fixed, a second longitudinal fold requires a cutter or similar method. However, the mechanical movement of the cutter is limited in speed, resulting in low efficiency, complex structure, high cost, and the inability to promptly remove air from the paper after the first longitudinal fold, affecting the overall folding effect. Utility Model Content

[0003] The technical problem this utility model aims to solve is to overcome the existing defects and provide a double-triangle folding mechanism for an inkjet rotary printing press. This mechanism enables a single machine to complete two longitudinal folding operations on paper. The paper folding and bookbinding process is simple and smooth, with high efficiency. It also features a simple structure, low cost, and stable and reliable operation. Furthermore, it provides timely air removal after the first longitudinal fold, resulting in good air removal, improved longitudinal folding quality and effect, and minimal damage to the paper from compression. This effectively solves the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-triangle folding mechanism for an inkjet rotary printing press, comprising a longitudinal folding support one and a longitudinal folding support two mounted on a folding frame. The longitudinal folding support one is equipped with a paper feeding roller, and a large triangle plate is mounted on the longitudinal folding support one at the conveying end of the paper feeding roller, the large triangle plate being used for the first longitudinal fold of the paper; the longitudinal folding support two is equipped with a power pulley roller, and a small triangle plate is mounted on the longitudinal folding support two at the conveying end of the power pulley roller, the small triangle plate being used for the second longitudinal fold of the paper; a set of traction rollers two for pulling the paper for the second longitudinal fold is mounted on the folding frame below the small triangle plate; a cutting unit, a book-sticker conveyor belt, and a book-sticker collection wheel are also mounted on the folding frame below the traction rollers two, the book-sticker conveyor belt being located below the cutting unit, and the book-sticker collection wheel being located at the conveying end of the book-sticker conveyor belt.

[0005] Furthermore, a set of traction rollers for pulling the paper in one longitudinal fold is provided on the folding frame below the large triangular plate, and a guide roller is also provided on the folding frame downstream of the traction rollers.

[0006] Furthermore, the cutting unit includes a horizontally arranged cutting roller and a rubber strip roller, and the book cover conveyor belt is located below the cutting roller.

[0007] Furthermore, the second longitudinal folding bracket is provided with a paper-pressing and exhaust wheel mechanism at the upper end of the power pulley roller. The paper-pressing and exhaust wheel mechanism includes a rotating shaft on the second longitudinal folding bracket, and multiple paper-pressing wheel units are provided on the rotating shaft along its axial direction. Each paper-pressing wheel unit includes a paper-pressing roller that can abut against the power pulley roller. A cam is also fixedly provided on one side of the rotating shaft. A cylinder is movably connected to the second longitudinal folding bracket. The extension and retraction end of the cylinder is movably connected to the cam, and the extension and retraction end of the cylinder can drive the cam to drive the rotating shaft to rotate.

[0008] Furthermore, the paper pressing roller unit also includes a bushing one fixed on the rotating shaft, and a support plate one fixed on the outer circumference of the bushing one; a bushing two is rotatably mounted on one side of the rotating shaft at the bushing one end, and a support plate two is fixed on the outer circumference of the bushing two; an upper limit block and a lower limit block are respectively provided at the upper and lower ends of the support plate two on the support plate one, and the distance between the upper limit block and the lower limit block is greater than the thickness of the support plate two; a stepped screw is threaded onto the upper limit block, the end of the stepped screw passes through the upper limit block and faces the support plate two, and a spring is provided between the stepped surface of the stepped screw and the support plate two; the paper pressing roller is rotatably connected to the support plate two through a connecting shaft.

[0009] Furthermore, an adjusting screw is threaded onto the lower limit block, with the end of the adjusting screw penetrating the lower limit block and facing the second support plate; the upper surface of the second support plate is provided with a receiving groove for accommodating the spring.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The double triangular plate folding mechanism of this inkjet rotary printing press enables the paper to complete two longitudinal folding operations through the large and small triangular plates. Then, the paper is cut into bookmarks by the cutter roller and the rubber strip roller. This allows one machine to complete two longitudinal folding operations of the paper. The paper folding into bookmark processing is simple and smooth, the bookmark processing efficiency is high, and the structure is simple, the cost is low, and the equipment operates stably and reliably. The paper pressure exhaust roller mechanism promptly exhausts the paper after one longitudinal fold, resulting in good paper exhaust effect, improving the quality and effect of longitudinal folding, and minimizing the pressure damage to the paper. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a side view of the folding frame of this utility model located at two points on the longitudinal folding bracket;

[0013] Figure 3 This is a partial enlarged view of the longitudinal folding bracket of this utility model;

[0014] Figure 4 This is a top view of the paper-pressing exhaust wheel mechanism of this utility model;

[0015] Figure 5 This is a schematic diagram of the paper pressing wheel unit structure of this utility model.

[0016] In the diagram: 1. Folding frame; 2. Longitudinal folding support one; 3. Paper feed roller; 4. Large triangular plate; 5. Traction roller one; 6. Guide roller; 7. Longitudinal folding support two; 8. Power pulley roller; 9. Paper pressure exhaust wheel mechanism; 91. Rotating shaft; 92. Paper pressure wheel unit; 921. Bushing one; 922. Support plate one; 923. Upper limit block; 924. Lower limit block; 925. Bushing two; 926. Support plate two; 9261. Receiving groove; 927. Paper pressure roller; 928. Step screw; 929. Spring; 9210. Adjusting screw; 93. Cam; 94. Cylinder; 10. Small triangular plate; 11. Traction roller two; 12. Cutting roller; 13. Rubber strip roller; 14. Book sticker conveyor belt; 15. Book sticker collection wheel. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] Please see Figure 1-5 This utility model provides a technical solution: a double-triangle plate folding mechanism for an inkjet rotary printing press, including a longitudinal folding support 1 and a longitudinal folding support 2 7 provided on a folding frame 1. The longitudinal folding support 1 2 is provided with a paper feeding roller 3, and a large triangle plate 4 is provided on the longitudinal folding support 1 2 at the conveying end of the paper feeding roller 3. The large triangle plate 4 is used for longitudinal folding of paper once. A set of traction rollers 5 for pulling the paper for longitudinal folding once is provided on the folding frame 1 below the large triangle plate 4, and a guide roller 6 is also provided on the downstream side of the conveying of the traction rollers 1 5 on the folding frame 1.

[0019] The longitudinal folding support 7 is equipped with a power pulley roller 8. A small triangular plate 10 is provided at the conveying end of the power pulley roller 8 on the longitudinal folding support 7. The small triangular plate 10 is used for secondary longitudinal folding of paper. A set of traction rollers 11 for pulling the paper for secondary longitudinal folding is provided below the small triangular plate 10 on the folding frame 1. A cutting unit, a book-sticker conveyor belt 14 and a book-sticker collection wheel 15 are also provided below the traction rollers 11 on the folding frame 1. The cutting unit includes a horizontally arranged cutter roller 12 and a rubber strip roller 13. The book-sticker conveyor belt 14 is located below the cutter roller 12. The book-sticker collection wheel 15 is located at the conveying end of the book-sticker conveyor belt 14.

[0020] The longitudinal folding bracket 2 7 is provided with a paper-pressing and exhaust wheel mechanism 9 at the upper end of the power pulley roller 8. The paper-pressing and exhaust wheel mechanism 9 includes a rotating shaft 91 on the longitudinal folding bracket 2 7. Multiple paper-pressing wheel units 92 are provided on the rotating shaft 91 along its axial direction. Each paper-pressing wheel unit 92 includes a bushing 1 921 fixed on the rotating shaft 91. A support plate 1 922 is fixedly provided on the outer circumferential wall of the bushing 1 921. A bushing 2 925 is rotatably provided on one side of the rotating shaft 91 at the bushing 1 921. A support plate 2 926 is fixedly provided on the outer circumferential wall of the bushing 2 925. An upper limit block 923 and a lower limit block 926 are respectively provided on the upper and lower ends of the support plate 1 922 at the support plate 2 926. 24, and the distance between the upper limit block 923 and the lower limit block 924 is greater than the thickness of the support plate 926; the upper limit block 923 is threaded with a stepped screw 928, the end of the stepped screw 928 passes through the upper limit block 923 and faces the support plate 926, and a spring 929 is provided between the stepped surface of the stepped screw 928 and the support plate 926; the support plate 926 is rotatably connected to a paper pressing roller 927 via a connecting shaft; a cam 93 is also fixedly provided on one side of the rotating shaft 91, and a cylinder 94 is movably connected to the longitudinal folding bracket 7, the telescopic end of the cylinder 94 is movably connected to the cam 93, and the telescopic end of the cylinder 94 can drive the cam 93 to drive the rotating shaft 91 to rotate.

[0021] Working principle:

[0022] Paper is fed onto large triangle plate 4 via paper feed roller 3. The paper undergoes its first longitudinal folding operation via large triangle plate 4. After the first longitudinal fold, the paper is fed onto power pulley roller 8 via traction roller 1 5. The paper on power pulley roller 8 undergoes its second longitudinal folding operation via small triangle plate 10. After the second longitudinal fold, the paper is fed onto cutting unit via traction roller 2 11. The paper is cut by cutting roller 12 and rubber strip roller 13. The cutting circumference of the paper can be adjusted by adjusting the rotation speed of cutting roller 12 and rubber strip roller 13. The cut paper forms book stickers and is sent to book sticker collection roller 15 via book sticker conveyor belt 14 to complete the book sticker collection operation.

[0023] When the paper after a longitudinal fold passes through the power pulley roller 8, the cylinder 94 retracts and pulls the cam 93 to drive the rotating shaft 91 to rotate. The rotating shaft 91 drives the bushing 921 and the support plate 922 to rotate in the direction of the power pulley roller 8. The upper limit block 923 and the lower limit block 924 on the support plate 922 drive the support plate 926 and the bushing 925 to rotate together with the bushing 921, so that the pressure roller 927 presses the paper on the power pulley roller 8 to release air from the paper after a longitudinal fold. The spring 929 makes the pressure roller 927 elastically press the paper, which has a good air release effect and little damage to the paper. The elastic pressing force of the pressure roller 927 on the paper can be adjusted by turning the stepped screw 928.

[0024] Furthermore, an adjusting screw 9210 is threaded onto the lower limit block 924, with the end of the adjusting screw 9210 passing through the lower limit block 924 and facing the support plate 926. The upper surface of the support plate 926 has a receiving groove 9261 for accommodating the spring 929. The suspension angle of the support plate 926 can be adjusted by turning the adjusting screw 9210, making the adjustment more flexible and convenient, and allowing the paper pressing and exhaust wheel mechanism 9 to be suitable for pressing and venting paper of different thicknesses.

[0025] The double-triangle folding mechanism of the inkjet rotary printing press disclosed in this embodiment completes two longitudinal folds of the paper through the large triangle 4 and the small triangle 10. Then, the paper is cut into bookmarks by the cutter roller 12 and the rubber strip roller 13. This allows one machine to complete two longitudinal folds of the paper. The paper folding into bookmarks process is simple and smooth, with high bookmark processing efficiency. It also has a simple structure, low cost, and stable and reliable operation. The paper pressure exhaust roller mechanism 9 promptly exhausts the paper after one longitudinal fold, resulting in good paper exhaust effect, improving the quality and effect of longitudinal folding, and minimizing the pressure damage to the paper.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-triangle folding mechanism for an inkjet rotary printing press, comprising a first longitudinal folding bracket and a second longitudinal folding bracket mounted on a folding frame, characterized in that: The first longitudinal folding support is equipped with a paper feeding roller, and a large triangular plate is located at the conveying end of the paper feeding roller on the first longitudinal folding support. The large triangular plate is used for the first longitudinal folding of the paper. The second longitudinal folding support is equipped with a power pulley roller, and a small triangular plate is located at the conveying end of the power pulley roller on the second longitudinal folding support. The small triangular plate is used for the second longitudinal folding of the paper. A set of traction rollers is located below the small triangular plate on the folding frame for pulling the paper for the second longitudinal folding. The folding frame is also equipped with a cutting unit, a book sticker conveyor belt and a book sticker collection wheel located below the traction rollers. The book sticker conveyor belt is located below the cutting unit, and the book sticker collection wheel is located at the conveying end of the book sticker conveyor belt.

2. The double-triangle folding mechanism for an inkjet rotary printing press according to claim 1, characterized in that: The folding frame is provided with a set of traction rollers for pulling the paper in one longitudinal fold below the large triangular plate, and a guide roller is also provided on the downstream side of the conveying of the traction rollers on the folding frame.

3. The double-triangle folding mechanism for an inkjet rotary printing press according to claim 1, characterized in that: The cutting unit includes a horizontally arranged cutting roller and a rubber strip roller, with the book cover conveyor belt located below the cutting roller.

4. The double-triangle folding mechanism for an inkjet rotary printing press according to claim 1, characterized in that: The longitudinal folding bracket 2 is equipped with a paper-pressing and exhaust wheel mechanism located above the power pulley roller. The paper-pressing and exhaust wheel mechanism includes a rotating shaft on the longitudinal folding bracket 2, and multiple paper-pressing wheel units are arranged along its axial direction on the rotating shaft. Each paper-pressing wheel unit includes a paper-pressing roller that can abut against the power pulley roller. A cam is also fixedly provided on one side of the rotating shaft. A cylinder is movably connected to the longitudinal folding bracket 2. The extension and retraction end of the cylinder is movably connected to the cam, and the extension and retraction end of the cylinder can drive the cam to drive the rotating shaft to rotate.

5. The double-triangle folding mechanism for an inkjet rotary printing press according to claim 4, characterized in that: The paper pressing roller unit also includes a bushing one fixed on a rotating shaft, and a support plate one fixed on the outer circumference of the bushing one; a bushing two is rotatably mounted on one side of the rotating shaft at the bushing one end, and a support plate two is fixed on the outer circumference of the bushing two; an upper limit block and a lower limit block are respectively provided at the upper and lower ends of the support plate two on the support plate one, and the distance between the upper limit block and the lower limit block is greater than the thickness of the support plate two; a stepped screw is threaded onto the upper limit block, the end of the stepped screw passes through the upper limit block and faces the support plate two, and a spring is provided between the stepped surface of the stepped screw and the support plate two; the paper pressing roller is rotatably connected to the support plate two through a connecting shaft.

6. The double-triangle folding mechanism for an inkjet rotary printing press according to claim 5, characterized in that: The lower limit block is threaded with an adjusting screw, the end of which passes through the lower limit block and faces the second support plate; the upper surface of the second support plate is provided with a receiving groove for accommodating the spring.

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