Stable paper collecting device of offset press

Abstract

The utility model relates to the technical field of printing equipment, and provides an offset press stable paper collecting device which comprises a paper collecting table arranged at the rear end of a conveying belt of an offset press, a limiting mechanism is arranged on the side, away from the conveying belt, of the paper collecting table, and the limiting mechanism comprises a rotating shaft rotationally erected on an offset printing bin on the offset press and a plurality of stopping pieces arranged on the rotating shaft at intervals. The top end of the blocking piece is normally higher than the paper collecting table so that a paper collecting station can be formed between the blocking piece and the paper collecting table. A paper stacking mechanism used for forcing the side faces of the printing paper to be aligned is further arranged on the outer side of the paper collecting station. According to the stable paper collecting device of the offset press, printing paper falling into a paper box can be stacked in order, and subsequent printing paper arrangement and collection are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a stable paper collecting device of a offset printing machine. BACKGROUND

[0002] The offset printing machine is a kind of lithographic printing machine, which is widely used in graphic printing field. After the paper is introduced with the required pattern on the offset printing machine, the printed paper needs to be collected at the paper outlet position of the offset printing machine.

[0003] In the prior art, a paper collecting device is disclosed in a Chinese patent with the authorization announcement number CN216613438U. The printed paper is directly collected into the paper box by the inertia of the movement of the printed paper on the conveying belt. Since the weight of the paper is relatively light, the wind resistance and resistance factors have a great influence on the paper during the falling process, so that the printed paper is placed in a very chaotic manner after falling into the paper box, which is not conducive to the subsequent arrangement and collection of the printed paper, and needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a stable paper collecting device of an offset printing machine, which can stack the printed paper falling into the paper box in an orderly manner, so as to facilitate the subsequent arrangement and collection of the printed paper.

[0005] The stable paper collecting device of the offset printing machine provided by the present application adopts the following technical scheme:

[0006] The stable paper collecting device of the offset printing machine comprises a paper collecting table arranged at the rear end of the conveying belt of the offset printing machine. A limiting mechanism is arranged on the side of the paper collecting table away from the conveying belt. The limiting mechanism comprises a rotating shaft arranged on the offset printing cabin of the offset printing machine and a plurality of resisting pieces arranged at intervals on the rotating shaft. The top end of the resisting piece is higher than the paper collecting table in normal state, so as to form a paper collecting station between the resisting piece and the paper collecting table. A paper stacking mechanism is further arranged on the outside of the paper collecting station, which is used to align the side of the printed paper.

[0007] By adopting the above technical scheme, when the printed paper printed on the front end is conveyed forward and falls on the paper collecting table, the resisting piece higher than the paper collecting table can limit the movement of the printed paper, so that the printed paper can be automatically aligned on one side when falling on the paper collecting station. Then, the other side of the printed paper is pushed and arranged by the paper stacking mechanism on the outside of the paper collecting station, so that each printed paper can be stacked in an orderly manner, so as to facilitate the subsequent arrangement and collection of the printed paper.

[0008] Optionally, the offset printing cabin is fixed with a mounting base, the mounting base is vertically slidingly installed with a lifting seat, and the lifting seat is connected with a first pushing member for moving the lifting seat. The rotating shaft is rotationally connected to the lifting seat.

[0009] By adopting the technical scheme, the rotating shaft is rotationally connected to the lifting seat, the height of the rotating shaft and the abutting piece is changed by the first pushing member for adjusting the height of the lifting seat, and the stacked arrangement of the printed paper with different thicknesses is suitable.

[0010] Optionally, the paper receiving table is provided with a plurality of notches on the side away from the conveying belt, the number of the notches matches the number of the abutting pieces, and each abutting piece is partially located in each corresponding notch; an adjusting rod is slidably installed at the bottom of the paper receiving table, and the adjusting rod is connected with a second pushing member for moving the adjusting rod; the adjusting rod is always horizontally arranged in each notch, and the abutting piece is normally abutted against the adjusting rod under its own gravity.

[0011] By adopting the technical scheme, the abutting piece can rotate around the central axis of the rotating shaft and is normally abutted against the adjusting rod under its own gravity, the adjusting rod is moved in the notch area by the second pushing member, and the inclination angle of the abutting piece can be changed; it can be known that the smaller the inclination angle of the abutting piece relative to the vertical direction, the easier the abutting piece is to be forced to rotate backward, and thus when the conveying belt conveys the printed paper forward, the printed paper is abutted against the abutting piece and falls on the paper receiving station, the force of the printed paper acting on the abutting piece can force the abutting piece to move backward and avoid, which is beneficial to reduce the possibility of bending and even local breaking of the printed paper under the printing force.

[0012] Optionally, the rotating shaft is rotationally arranged at the bottom of the offset printing cabin, the offset printing cabin is provided with a through area, and each abutting piece is arranged to pass through the through area; when the abutting piece is abutted against the inner wall of the through area away from the conveying belt, the abutting piece is arranged to be inclined toward the conveying belt.

[0013] By adopting the technical scheme, the through area for the abutting piece to pass through is arranged at the bottom of the offset printing cabin, and the rotating shaft is rotationally arranged at the bottom of the offset printing cabin, which can facilitate the adjustment of the height of the rotating shaft and the abutting piece; and when the abutting piece is abutted against the inner wall of the through area away from the conveying belt, the abutting piece can be inclined toward the conveying belt, so that the abutting piece can always be kept in abutment and limiting position for the printed paper, which is beneficial to the neat stacking of the printed paper on the paper receiving station.

[0014] Optionally, a partition frame is fixedly arranged in the offset printing cabin, the partition frame is provided with a chain conveying mechanism, a plurality of paper clamping mechanisms are arranged at intervals on the chain conveying mechanism, and the paper clamping mechanisms are used to transfer the printed paper from the conveying belt to the paper receiving table.

[0015] The paper clamping mechanism comprises a connecting shaft, a deflection shaft and a paper clamping tooth block, the connecting shaft is fixedly connected to the chain transmission mechanism, an outer extension ring is fixedly arranged on the outer periphery of the connecting shaft, the deflection shaft is rotationally connected to the outer extension ring, and a torsion spring is arranged between the deflection shaft and the outer extension ring.

[0016] A plurality of paper clamping tooth blocks are arranged at intervals along the axis direction of the deflection shaft; the torsion spring is used to force the paper clamping tooth block to be normally abutted against the outer peripheral surface of the connecting shaft.

[0017] The end of the deflection shaft is fixed with a crescent block, the partition frame is fixed with a guide plate, and the guide plate is located above the paper receiving table; when the paper picking mechanism moves to above the paper receiving table, the guide plate abuts against the crescent block and forces the deflection shaft to rotate away from the connecting shaft.

[0018] By adopting the technical scheme, the chain conveying structure drives the paper picking mechanism to move stably in the inside of the offset printing warehouse through its continuous movement; and the paper picking teeth can provide uniform clamping force when picking the paper to ensure that the paper does not slip or damage in the transfer process, and the design of the torsional spring can make the paper picking block abut against the outer circumferential surface of the connecting shaft under the bearing platform, thereby ensuring the stability and reliability in the paper picking process. When the paper picking mechanism moves to above the paper receiving table, the guide plate is lower than the crescent block and forces the deflection shaft to rotate away from the connecting shaft, thereby driving the paper picking block to open and release the paper.

[0019] Optionally, the paper stacking mechanism comprises an extension column movably inserted into the partition frame and a paper stacking plate fixedly connected to the end of the extension column, and an elastic member is arranged between the extension column and the partition frame, and the elastic member is used to force the extension column to move away from the paper receiving platform in a normal state; the crescent block is fixed with a push block, and when the crescent block abuts against the guide plate and rotates, the push block can abut against the extension column and force the paper stacking plate to move towards the paper receiving platform.

[0020] By adopting the technical scheme, when the paper picking mechanism transfers the paper to the paper receiving table, the crescent block abuts against the guide plate and rotates. At this time, the push block can abut against the extension column and force the paper stacking plate to move towards the paper receiving platform. This design enables the paper stacking plate to automatically align and stack the paper, without manual intervention, thereby improving the production efficiency.

[0021] After the push block leaves the extension column, the elastic member forces the extension column and the paper stacking plate to return to the initial position, thereby preparing for the next paper alignment and stacking. This design not only ensures the continuous operation of the paper stacking plate, but also improves the stability and reliability of the equipment.

[0022] Optionally, a plurality of sets of auxiliary conveying mechanisms are arranged between the conveying belt and the paper receiving table, and the auxiliary conveying mechanisms are located below the moving path of the paper picking mechanism; wherein the auxiliary conveying mechanism comprises a fixedly arranged base support and a plurality of shaft wheels rotatably arranged on the base support, and one of the shaft wheels is connected with a second driving motor for rotating the shaft wheel; and a paper receiving belt is collectively sleeved on the outer circumferential side of each shaft wheel.

[0023] By adopting the technical scheme, when the conveying belt conveys the paper to the rear end and the paper picking mechanism clamps the paper, the paper receiving belt can support the bottom of the paper, so that the paper is clamped between the connecting shaft and the paper receiving belt, thereby increasing the stability of the paper in the conveying process of the paper picking mechanism.

[0024] Optionally, the inside of the offset printing cabin is provided with a plurality of fan modules, the fan modules are located on two opposite sides of the moving path of the paper holding mechanism, and the fan modules are used for blowing forward wind.

[0025] By using the above technical scheme, when the paper holding mechanism moves the paper, the forward wind can help keep the paper stable and reduce the fluctuation of the paper during the movement. In addition, the forward wind can clearly remove dust and impurities on the paper and the machine, and keep the printing environment and clean.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. By setting the limiting mechanism and the paper pushing mechanism, when the printed paper falls on the paper receiving table, the resistance piece higher than the paper receiving table can limit the movement of the printed paper, so that the printed paper can be automatically aligned on one side when it falls on the paper receiving work station. Then, the other side of the printed paper is pushed and arranged by the paper stacking mechanism outside the paper receiving work station, so that each printed paper can be stacked neatly, facilitating the subsequent arrangement and collection of the printed paper.

[0028] 2. By setting the auxiliary conveying mechanism, the paper receiving belt can support the bottom of the paper and clamp it between the connecting shaft and the paper receiving belt, thereby increasing the stability of the paper during transportation by the paper holding mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a partial sectional view of the embodiment, mainly showing the limiting mechanism;

[0030] Figure 2 is a structural schematic view of the paper holding mechanism of the embodiment;

[0031] Figure 3 is a partial enlarged view of a of Figure 2

[0032] Figure 4 is a partial enlarged view of b of Figure 2

[0033] Figure 5 is a structural schematic view of the paper pushing structure of the embodiment;

[0034] Figure 6 is a structural schematic view of the second pushing component of the embodiment.

[0035] ​​Explanation of reference signs: 1, offset press; 11, offset cabin; 12, conveying belt; 13, partition frame; 14, guide plate; 15, fan module; 16, movable hole; 17, through area; 2, paper receiving table; 21, notch; 22, adjusting rod; 23, second push member; 24, mounting plate; 25, screw rod; 26, threaded groove; 3, limiting mechanism; 31, rotating shaft; 32, stopper; 4, paper pushing mechanism; 41, extension column; 42, paper pushing plate; 43, elastic member; 44, limiting plate; 45, pushing block; 46, guide groove; 47, guide surface; 5, chain conveying mechanism; 51, sprocket; 52, chain belt; 53, third drive motor; 6, paper gripping mechanism; 61, connecting shaft; 62, deflection shaft; 63, paper gripping tooth block; 64, outer extension ring; 65, crescent block; 7, auxiliary conveying mechanism; 71, base support; 72, paper receiving belt; 73, shaft wheel; 74, second drive motor; 8, lifting seat; 81, mounting base; 82, first push member. DETAILED DESCRIPTION

[0036] The following will be described in detail with reference to the accompanying drawings. Figures 1-6 The application is further described in detail.

[0037] The embodiment of the application discloses a stable paper receiving device of an offset press.

[0038] Reference Figure 1 and Figure 2 A stable paper receiving device of an offset press 1 is arranged on the offset press 1 and comprises a paper receiving table 2, a limiting mechanism 3 and a paper stacking mechanism. The paper receiving table 2 is arranged at the rear end of a conveying belt 12 of the offset press 1 and used for receiving paper, the limiting mechanism 3 is arranged on the side of the paper receiving table 2 away from the conveying belt 12 and used for limiting the movement of the paper, and the paper stacking mechanism forces the side of the paper to be aligned.

[0039] Reference Figure 2 The offset press 1 has an offset cabin 11, the offset cabin 11 is provided with a conveying belt 12, a conveying shaft is rotatably arranged in the offset cabin 11, the conveying belt 12 is arranged around the surface of the conveying shaft, and the offset press is provided with a first drive motor used for driving the conveying roller to rotate; through the first drive motor, the conveying belt 12 can be conveyed to convey the conveying belt 12.

[0040] Two partition frames 13 are fixed in the offset cabin 11, and the two partition frames 13 are arranged at the rear end of the conveying direction of the conveying belt 12; the two partition frames 13 are respectively arranged on the two sides of the conveying direction of the paper; the partition frame 13 is provided with a chain conveying mechanism 5, the chain conveying mechanism 5 comprises a sprocket 51 rotatably arranged on the partition frame 13, a chain belt 52 arranged around the outer wall of the sprocket 51 and a third drive motor 53 used for driving the sprocket 51 to rotate.

[0041] A plurality of paper clamping mechanisms 6 are arranged between the two partition frames 13, and the two ends of all the paper clamping mechanisms 6 are arranged at intervals along the conveying direction of the chain conveying mechanisms 5; the paper clamping mechanism 6 comprises a connecting shaft 61, a swing shaft 62 and a paper clamping tooth block 63, and the two ends of the connecting shaft 61 are fixed with the chain belts 52 of the two chain conveying mechanisms 5 respectively; a plurality of outer extension rings 64 are fixed on the outer circumferential wall of the connecting shaft 61, and all the outer extension rings 64 are arranged at intervals along the length direction of the connecting shaft 61; the swing shaft 62 is rotationally connected with all the outer extension rings 64, and a torsion spring is arranged between the swing shaft 62 and the outer extension ring 64.

[0042] The paper clamping tooth block 63 is arranged in a plurality of pieces, all the paper clamping tooth blocks 63 are fixed on the swing shaft 62 and arranged at intervals along the extension direction of the swing shaft 62, and the elastic force of the torsion spring is used to drive the paper clamping tooth block to abut against the outer wall of the connecting shaft 61, so as to stably clamp the paper between the paper clamping tooth block 63 and the connecting shaft 61.

[0043] At the same time, referring to Figure 3 , the two ends of the swing shaft 62 are provided with crescent blocks 65, and the two partition frames 13 are provided with guide plates 14, the guide plates 14 are located above the paper receiving table 2, and the side of the crescent block 65 with the arc surface is used to abut against the guide plate 14; when the paper clamping structure moves above the paper receiving platform, the crescent block 65 abuts against the guide plate 14 and drives the swing shaft 62 to rotate backward, so that the paper clamping tooth block 63 rotates toward the side away from the shaft of the connecting shaft 61, and the paper falls onto the paper receiving platform.

[0044] Referring to Figure 4 , the bottom of the offset printing cabin 11 is provided with a plurality of auxiliary conveying mechanisms 7, all the auxiliary conveying mechanisms 7 are located between the conveying belt 12 and the paper receiving table 2, and are located below the moving path of the paper clamping mechanism 6, and the auxiliary conveying mechanism 7 is located between the adjacent two paper clamping tooth blocks 63. In the embodiment, the auxiliary conveying mechanism 7 comprises a base support 71 fixedly arranged at the bottom of the offset printing cabin 11, a plurality of shaft wheels 73 rotationally installed on the base support 71, and a paper receiving belt 72 sleeved on the outer wall of the shaft wheel 73, and the base support 71 is installed with a second driving motor 74 for driving one of the shaft wheels 73 to rotate, and the paper receiving belt 72 can be conveyed by driving the second driving motor 74 to rotate.

[0045] Referring to Figure 1 , a plurality of fan modules 15 are arranged on the inner top wall of the offset printing cabin 11, and all the fan modules 15 are located above the moving path of the paper clamping mechanism 6, so as to blow the forward wind. By arranging the fan module 15, the forward wind can help to keep the paper stable and reduce the fluctuation of the paper in the moving process; and the forward wind can clearly remove the dust and impurities on the paper and the machine, and keep the printing environment and clean.

[0046] Referring to Figure 2 and Figure 5The paper stacking mechanism is provided with two groups, and the two groups of paper stacking mechanisms are connected with the two partition racks 13 respectively. The paper stacking mechanism comprises an extension column 41, a paper stacking plate and an elastic member 43. The paper stacking plate is fixed to one end of the extension column 41 close to the paper receiving table 2. The other end of the extension column 41 is provided with a limiting plate 44, and the limiting plate 44 is used for placing the extension column 41 to be separated from the movable hole 16.

[0047] With reference to Figure 5 In the embodiment, the elastic member 43 is a spring, which is sleeved on the outer wall of the extension column 41, and the two ends of the spring are connected with the limiting plate 44 and the paper stacking plate respectively. The elastic force of the spring is used to drive the paper pushing plate 42 to move towards one side of the partition rack 13.

[0048] The side of the crescent block 65 close to the paper receiving table 2 is provided with a pushing block 45. The side of the extension column 41 close to the crescent block 65 is provided with a guide groove 46. The side of the guide groove 46 away from the pushing block 45 is provided with a guide surface 47, which is used to guide the extension column 41 to move towards the side of the paper receiving table 2.

[0049] When the paper taking mechanism 6 transfers the printed paper to the paper receiving table 2, the crescent block 65 will abut against the guide plate 14 and rotate. At this time, the pushing block 45 can abut against the guide surface 47 and force the paper pushing plate 42 to move towards the direction close to the paper receiving table. Thus, the paper pushing plate 42 can automatically align and stack the printed paper, without manual intervention, thereby improving the production efficiency.

[0050] With reference to Figure 1 The limiting mechanism 3 comprises a rotating shaft 31 and a plurality of resisting members 32. The offset printing cabin 11 is provided with two lifting seats 8, and the two lifting seats 8 are both slidingly installed with an installation base 81. The offset printing cabin 11 is provided with a first pushing member 82 for driving the installation base 81 to slide. In the embodiment, the first pushing member 82 is a pneumatic cylinder, which is installed in the offset printing cabin 11, and the movable plug of the pneumatic cylinder is connected with the lifting seat.

[0051] The two ends of the rotating shaft 31 are rotatably connected with the two installation bases 81 respectively, and all the resisting members 32 are fixed on the rotating shaft 31. The offset printing cabin 11 is provided with a through region 17, and all the resisting members 32 are arranged in the through region 17. The top end of the resisting member 32 is higher than the paper receiving table 2 in the normal state, so as to form a paper receiving station between the resisting member 32 and the paper receiving table 2. The stacking mechanism is installed outside the paper receiving station. When the resisting member 32 abuts against the inner wall of the through region 17 away from the conveying belt 12, the resisting member 32 is arranged to be inclined towards the conveying belt 12.

[0052] With reference to Figure 6, the paper receiving table 2 is provided with notches 21 which are in communication with the through region 17, the number of the notches 21 matches the number of the stop pieces 32, and each stop piece 32 is partially located in each corresponding notch 21; the bottom of the paper receiving table 2 is slidably provided with an adjusting rod 22, the adjusting rod 22 is used to be horizontally arranged in each notch 21, so that the stop piece 32 is normally in contact with the adjusting rod 22 under its own gravity.

[0053] The paper receiving table 2 is provided with a second sliding component for driving the adjusting rod 22 to slide, in the embodiment, the second sliding component includes a mounting plate 24 and a screw rod 25, the mounting plate 24 is mounted on the bottom of the paper receiving table 2 and is located on the side of the adjusting rod 22 away from the stop piece 32; the mounting plate 24 is provided with a threaded groove 26, and the screw rod 25 is threadedly mounted in the threaded groove 26, and one end of the screw rod 25 is rotatably connected with the adjusting rod 22.

[0054] The implementation principle of the stable paper receiving device of the offset press 1 in the embodiment is as follows:

[0055] When the printed paper which is printed at the front end is conveyed forward and falls on the paper receiving table 2, the stop piece 32 which is higher than the paper receiving table 2 can limit the movement of the printed paper, so that the printed paper can be automatically aligned on one side when it falls on the paper receiving position, and then the other side of the printed paper is pushed and arranged by the paper pushing plate 42 outside the paper receiving position, so that each printed paper can be neatly stacked, thereby facilitating the arrangement and collection of the subsequent printed paper.

[0056] The above is the preferred embodiment of the present application, which does not limit the protection scope of the present application, therefore: any equivalent change made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. An offset press stable delivery device characterized by: The application relates to a paper collecting table (2) arranged at the rear end of a conveying belt (12) of a printing machine (1), wherein a limiting mechanism (3) is arranged at the side of the paper collecting table (2) away from the conveying belt (12), the limiting mechanism (3) comprises a rotating shaft (31) rotatably arranged on a printing cabin (11) of the printing machine (1) and a plurality of resisting pieces (32) arranged at intervals on the rotating shaft (31), the top end of each resisting piece (32) is higher than the paper collecting table (2) in normal state, and the resisting pieces (32) and the paper collecting table (2) form a paper collecting station; and a paper stacking mechanism is arranged outside the paper collecting station and used for aligning the side of the printed paper.

2. The offset printing press (1) with a smooth delivery according to claim 1, characterized in that: The printing cabin (11) is fixed with a mounting base (81), the mounting base (81) is vertically slidably arranged with a lifting seat (8), and the lifting seat (8) is connected with a first pushing component (82) used for moving the lifting seat (8); and the rotating shaft (31) is rotatably connected with the lifting seat (8).

3. The offset printing press (1) with a smooth delivery according to claim 2, characterized in that: The side of the paper collecting table (2) away from the conveying belt (12) is provided with a plurality of notches (21), the number of the notches (21) matches that of the resisting pieces (32), each resisting piece (32) is partially arranged in each corresponding notch (21), the bottom of the paper collecting table (2) is slidably arranged with an adjusting rod (22), the adjusting rod (22) is connected with a second pushing component (23) used for moving the adjusting rod (22), the adjusting rod (22) is always horizontally arranged in each notch (21), and the resisting pieces (32) are normally abutted against the adjusting rod (22) under the gravity of the resisting pieces (32).

4. The offset printing press (1) with a smooth delivery according to claim 3, characterized in that: The rotating shaft (31) is rotatably arranged at the bottom of the printing cabin (11), the printing cabin (11) is provided with a through region (17), and each resisting piece (32) is arranged through the through region (17); when the resisting piece (32) is abutted against the inner wall of the through region (17) away from the conveying belt (12), the resisting piece (32) is obliquely arranged towards the conveying belt (12).

5. The offset printing press (1) with a smooth delivery according to claim 1, characterized in that: The printing cabin (11) is internally fixed with a partition frame (13), the partition frame (13) is provided with a chain conveying mechanism (5), the chain conveying mechanism (5) is arranged with a plurality of paper clamping mechanisms (6), and the paper clamping mechanisms (6) are used for transferring the printed paper from the conveying belt (12) to the paper collecting table (2); The paper clamping mechanism (6) comprises a connecting shaft (61), a deflection shaft (62) and a paper clamping tooth block (63), the connecting shaft (61) is fixedly connected with the chain conveying mechanism, the outer periphery of the connecting shaft (61) is fixedly provided with an outer extension ring (64), the deflection shaft (62) is rotatably connected with the outer extension ring (64), and a torsional spring is arranged between the deflection shaft (62) and the outer extension ring (64). The paper clamping tooth block (63) is arranged at intervals along the axis direction of the deflection shaft (62), and the torsional spring is used for abutting the paper clamping tooth block (63) against the outer periphery of the connecting shaft (61). The end of the deflection shaft (62) is fixed with a crescent block (65), the baffle frame (13) is fixed with a guide plate (14), the guide plate (14) is located above the paper receiving table (2); when the paper clamping mechanism (6) moves to above the paper receiving table (2), the guide plate (14) abuts against the crescent block (65) and forces the deflection shaft (62) to rotate away from the connecting shaft (61).

6. The offset printing press (1) with a smooth delivery according to claim 5, characterized in that: The paper stacking mechanism comprises an extension column (41) movably inserted into the baffle frame (13) and a paper stacking plate fixedly connected to the end of the extension column (41), an elastic member (43) is arranged between the extension column (41) and the baffle frame (13), and the elastic member (43) is used to force the extension column (41) to move away from the paper receiving platform in a normal state; the crescent block (65) is fixed with a shifting block (45), when the crescent block (65) abuts against the guide plate (14) and rotates, the shifting block (45) can abut against the extension column (41) and force the paper stacking plate to move towards the paper receiving platform.

7. The offset printing press (1) with a smooth delivery according to claim 5, characterized in that: A plurality of sets of auxiliary conveying mechanisms (7) are arranged between the conveying belt (12) and the paper receiving table (2), the auxiliary conveying mechanisms (7) are located below the moving path of the paper clamping mechanism (6); wherein the auxiliary conveying mechanism (7) comprises a fixedly arranged base support (71) and a plurality of shaft wheels (73) rotatably arranged on the base support (71), one of the shaft wheels (73) is connected with a second driving motor (74) for rotating the shaft wheel (73); the outer circumferential sides of each of the shaft wheels (73) are collectively sleeved with a paper receiving belt (72).

8. The offset printing press (1) with a smooth delivery according to claim 7, characterized in that: A plurality of fan modules (15) are arranged inside the offset printing cabin (11), the fan modules (15) are located on two opposite sides of the moving path of the paper clamping mechanism (6) with the auxiliary conveying mechanism (7); the fan modules (15) are used to blow forward wind.

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