Paper pre-loading mechanism of flat paper printing machine

Abstract

The utility model discloses a paper pre-loading mechanism of a flat paper printing machine, which belongs to the technical field of printing machines and comprises a support, a guide rail arranged on the bottom surface below the support, a supporting plate slidably arranged at the top of the guide rail and moving towards the inner bottom of the support, balls rotatably mounted at the top of the supporting plate, and a lifting mechanism arranged in the supporting plate and used for controlling the balls to move up and down. A first motor is installed at the front end of the support, a first two-way screw is installed at the output end of the first motor, and angle steel is installed at the two ends of the first two-way screw in a threaded mode. The angle steel is installed at the two ends of the first two-way screw respectively, the paper aligning device can be tightly attached to the corners of paper stacks in the aligning process of the paper stacks, a traditional horizontal paper aligning baffle is replaced, and the paper aligning device is matched with an end face extrusion mechanism composed of a second motor, an air cylinder and an end plate at the top of the support for use. And the four side edges can be extruded and corrected at the same time in the paper stack correction process, the correction effect of the paper stack is improved, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to a paper preloading mechanism, in particular to a paper preloading mechanism for a sheet-fed printing press, and belongs to the technical field of printing presses. Background Art

[0002] In the prior art, for example, the utility model with application number 201721408502.3 discloses a paper stack preloading mechanism for a printing press. The position of the slider is first fixed according to the length of the printing paper. Then, when the paper stack is located between two sets of paper aligning baffles, the rotation of the guide rod is controlled by starting the drive motor, and the two sets of paper aligning baffles are controlled to move toward each other and fit on both sides of the paper stack. The two sides of the paper stack are corrected and aligned to facilitate the paper feeding action, and automatic alignment is realized, saving time and effort.

[0003] Similar to the above application, there are still some shortcomings:

[0004] 1. During the position correction and alignment of the paper stack, only two sides can be corrected and aligned, and the four sides cannot be corrected at the same time, which affects the correction and alignment effect;

[0005] 2. Although a ball bearing is set on the top of the support plate to facilitate the position adjustment of the paper stack, the position of the ball bearing is fixed, resulting in the bottom of the paper stack being supported only by the ball bearing. After a long period of support, the position where the bottom of the paper stack contacts the ball bearing is under great pressure, and the ball bearing at the bottom of the paper stack presses the bottom paper into a groove, affecting the printing effect;

[0006] For this reason, a pre-paper loading mechanism for a sheet-fed printing press is designed to optimize the above-mentioned problem. Utility Model Content

[0007] The main purpose of the utility model is to provide a pre-paper loading mechanism for a flat-sheet printing press, which can be closely attached to the corners of a paper stack during paper stack alignment by installing angle steels at both ends of a first bidirectional screw, thereby replacing the traditional horizontal paper alignment baffle, and is used in conjunction with an end face extrusion mechanism composed of a second motor, a cylinder and an end plate on the top of the bracket, so that the four sides can be extruded and corrected simultaneously during paper stack correction, thereby improving the correction effect of the paper stack and making it more practical. By opening an installation bin inside the support plate, and arranging a lifting mechanism composed of a cross plate, a support block, a second bidirectional screw and a trapezoidal block inside the installation bin, a ball bearing is rotatably installed on the top of the support block, so that the device only lifts the ball bearing during correction, effectively avoiding the formation of grooves on the paper at the bottom of the paper stack due to long-term support, thereby ensuring the printing effect.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A pre-loading paper mechanism for a flat-sheet printing press comprises a bracket, a guide rail is provided on the bottom surface below the bracket, a support plate is slidably provided on the top of the guide rail and moves toward the bottom of the bracket, a ball is rotatably installed on the top of the support plate, a lifting mechanism for controlling the up and down movement of the ball is provided inside the support plate, a first motor is installed at the front end of the bracket, a first bidirectional screw is installed at the output end of the first motor, angle steel is threadedly installed at both ends of the first bidirectional screw, and the angle steel is attached to the side of the top of the bracket, a scale line is provided along the length direction at one end of the bracket close to the first motor, a positioning mechanism is provided at the position of the top of the bracket close to the first bidirectional screw, a second motor is installed at the middle position of the top of the bracket, a cylinder is installed at the output end of the second motor, an end plate is installed at the output end of the cylinder, and the end plate is perpendicular to the horizontal plane.

[0010] Preferably, two groups of guide rails are provided in parallel, and rollers cooperating with the guide rails are fixed at the bottom of the support plate.

[0011] Preferably, rubber blocks are fixed to the bottom ends of the support rods at the four corners of the bottom of the bracket, and the bottoms of the rubber blocks are provided with anti-slip grooves.

[0012] Preferably: the positioning mechanism includes a third motor, a second bidirectional screw, and a limit plate, the third motor is installed on the top of the bracket, the second bidirectional screw is installed on the output end of the third motor, and both ends of the second bidirectional screw are threadedly installed with a limit plate, the bottom end of the limit plate is attached to the top of the bracket, and the limit plate is located above the first bidirectional screw, and the bottom of the limit plate is lower than the horizontal plane where the top end of the angle steel is located.

[0013] Preferably, the outer side surface of the limiting plate and the inner side surface of the angle steel are parallel to each other, and the limiting plate is attached to the outer side of the scale line.

[0014] Preferably: the lifting mechanism includes an installation bin, a transverse plate, a support block, a third bidirectional screw and a trapezoidal block, the installation bin is opened inside the support plate, a transverse plate is provided on the inner top of the installation bin, support blocks are evenly provided on the top of the transverse plate, the ball bearings are located on the top of the support blocks, a through opening matching with the support blocks is opened on the top of the support plate, a third bidirectional screw is rotatably installed between the two sides of the installation bin, trapezoidal blocks are threadedly installed on both ends of the third bidirectional screw, and the inclined surfaces on the top of the trapezoidal block are both in contact with the two ends of the bottom of the transverse plate.

[0015] Preferably, both ends of the third bidirectional screw extend to the outside of the support plate, and both ends of the third bidirectional screw are installed with adjustment disks.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a pre-loading paper mechanism for a flat-sheet printing machine. Angle steels are respectively installed at both ends of a first bidirectional screw rod, so that the paper stack can be closely attached to the corners of the paper stack during paper stack alignment, replacing the traditional horizontal paper alignment baffle. The mechanism is used in conjunction with an end face extrusion mechanism composed of a second motor, a cylinder and an end plate at the top of a bracket, so that the four sides can be extruded and corrected at the same time during paper stack correction, thereby improving the correction effect of the paper stack and being more practical.

[0018] By opening an installation bin inside the pallet and arranging a lifting mechanism consisting of a cross plate, a support block, a second bidirectional screw and a trapezoidal block inside the installation bin, the ball is rotatably installed on the top of the support block, so that the device lifts the ball only during the correction process, effectively avoiding the formation of grooves on the bottom of the paper stack due to long-term support, thereby ensuring the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a calibration state diagram of the utility model;

[0020] Figure 2 This is a diagram of the pre-use state of the utility model;

[0021] Figure 3 This is a partial structural diagram of the front end of the bracket of the utility model;

[0022] Figure 4 It is a cross-sectional view of the support plate of the present utility model.

[0023] In the figure: 1. bracket; 2. guide rail; 3. support plate; 4. ball bearing; 5. first motor; 6. first bidirectional screw; 7. angle steel; 8. scale line; 9. positioning mechanism; 10. second motor; 11. cylinder; 12. end plate; 13. third motor; 14. second bidirectional screw; 15. limit plate; 16. mounting bin; 17. cross plate; 18. support block; 19. third bidirectional screw; 20. trapezoidal block. DETAILED DESCRIPTION

[0024] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0025] like Figure 1-Figure 4As shown, the present embodiment provides a pre-loading paper mechanism for a sheet-fed printing press, comprising a bracket 1, a guide rail 2 is provided on the bottom surface below the bracket 1, a support plate 3 moving toward the bottom of the bracket 1 is slidably provided on the top of the guide rail 2, a ball 4 is rotatably installed on the top of the support plate 3, a lifting mechanism for controlling the up and down movement of the ball 4 is provided inside the support plate 3, a first motor 5 is installed at the front end of the bracket 1, a first bidirectional screw 6 is installed at the output end of the first motor 5, angle steel 7 is threadedly installed at both ends of the first bidirectional screw 6, and the angle steel 7 is attached to the side of the top of the bracket 1, a scale line 8 is provided along the length direction at one end of the bracket 1 close to the first motor 5, a positioning mechanism 9 is provided at the position of the top of the bracket 1 close to the first bidirectional screw 6, a second motor 10 is installed at the middle position of the top of the bracket 1, a cylinder 11 is installed at the output end of the second motor 10, an end plate 12 is installed at the output end of the cylinder 11, and the end plate 12 is perpendicular to the horizontal plane.

[0026] Overall working principle: During use, stack the paper on the top of the support plate 3, and then push the support plate 3 along the guide rail 2 to push the paper stack toward the bottom of the bracket 1. When the edge of the paper stack is between the two groups of angle steels 7, first adjust the position of the positioning mechanism 9 according to the width of the paper stack to limit the moving distance of the two groups of angle steels 7, and then use the lifting mechanism to push the ball 4 upward so that the paper stack can move, and then start the first motor 5 to control the rotation of the first bidirectional screw 6, move the two groups of angle steels 7 toward each other, and get stuck at the corners of the paper stack, calibrate the two sides of the paper stack, and then rotate the second motor 1 0, rotate the end plate 12 to the front end of the bracket 1, start the cylinder 11 to control the end plate 12 to move toward the paper stack, fit it to the end face of the paper chop, and squeeze the end face of the paper stack, fit the other end face of the paper stack to the other side of the angle steel 7, and correct the position of the end face of the paper stack to ensure the accuracy of the position of the paper stack. After the position adjustment of the paper stack is completed, use the lifting mechanism to move the ball 4 downward, and the bottom of the paper stack fits on the support plate 3 again. At the same time, control the rotation of the first motor 5 and the second motor 10 to reset the angle steel 7 and the end plate 12, and then load the paper stack onto the printing press.

[0027] In this embodiment, two sets of guide rails 2 are provided in parallel, and rollers cooperating with the guide rails 2 are fixed to the bottom of the support plate 3 .

[0028] Local working principle: The movement stability of the pallet 3 is ensured by two sets of guide rails 2. In addition, the rollers at the bottom of the pallet 3 reduce the friction between the pallet 3 and the guide rails 2.

[0029] In this embodiment, rubber blocks are fixed to the bottom ends of the support rods at the four corners of the bottom of the bracket 1, and the bottoms of the rubber blocks are provided with anti-slip grooves.

[0030] Partial working principle: During the placement of the device, the rubber block at the bottom of the bracket 1 improves the placement stability of the bracket 1.

[0031] In this embodiment, the positioning mechanism 9 includes a third motor 13, a second bidirectional screw 14, and a limit plate 15. The third motor 13 is installed at the top of the bracket 1. The second bidirectional screw 14 is installed at the output end of the third motor 13, and both ends of the second bidirectional screw 14 are threadedly installed with the limit plate 15. The bottom end of the limit plate 15 is attached to the top of the bracket 1, and the limit plate 15 is located above the first bidirectional screw 6. The bottom of the limit plate 15 is lower than the horizontal plane where the top of the angle steel 7 is located.

[0032] Local working principle: when limiting the moving position of the angle steel 7, start the third motor 13 to control the rotation of the second bidirectional screw 14, the second bidirectional screw 14 controls the two sets of limit plates 15 to move toward each other, and during the movement, visually observe the position of the limit plates 15 on the scale line 8 to ensure that the spacing between the two sets of limit plates 15 is the same as the length of the paper.

[0033] In this embodiment, the outer side surface of the limiting plate 15 and the inner side surface of the angle steel 7 are parallel to each other, and the limiting plate 15 is attached to the outer side of the scale line 8 .

[0034] Partial working principle: When the limit plate 15 contacts the inner side of the angle steel 7, they can fit tightly to ensure the stability of the limit, and the limit plate 15 fits on the outside of the scale line 8, which is convenient for visual inspection of the position of the limit plate 15.

[0035] In this embodiment, the lifting mechanism includes an installation bin 16, a transverse plate 17, a support block 18, a third bidirectional screw 19 and a trapezoidal block 20. The installation bin 16 is opened inside the support plate 3. The inner top of the installation bin 16 is provided with a transverse plate 17. The top of the transverse plate 17 is evenly provided with support blocks 18. The ball 4 is located on the top of the support block 18. The top of the support plate 3 is provided with a through opening that cooperates with the support block 18. The third bidirectional screw 19 is rotatably installed between the two sides of the installation bin 16. Both ends of the third bidirectional screw 19 are threadedly installed with trapezoidal blocks 20, and the inclined surfaces at the top of the trapezoidal block 20 are both in contact with the two ends of the bottom of the transverse plate 17.

[0036] Local working principle: When the ball 4 is controlled to be raised and lowered, the third bidirectional screw 19 is rotated to drive the two groups of trapezoidal blocks 20 to move simultaneously. When the two groups of trapezoidal blocks 20 move toward each other, the inclined surfaces contact the two sides of the bottom of the cross plate 17 and squeeze upward to push the ball 4 upward. When the two groups of trapezoidal blocks 20 move in opposite directions, the cross plate 17 is reset under the action of gravity, and the ball 4 moves downward.

[0037] In this embodiment, both ends of the third bidirectional screw 19 extend to the outside of the support plate 3 , and both ends of the third bidirectional screw 19 are installed with adjustment disks.

[0038] Partial working principle: Due to the setting of the adjustment disk at the end of the third bidirectional screw 19, manual adjustment is convenient and the use is more convenient.

[0039] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A paper preloading mechanism for a sheet-fed printing press, Features: The invention comprises a bracket (1), a guide rail (2) is provided on the bottom surface below the bracket (1), a support plate (3) is slidably provided on the top of the guide rail (2) and moves toward the bottom of the bracket (1), a ball (4) is rotatably installed on the top of the support plate (3), a lifting mechanism for controlling the up and down movement of the ball (4) is provided inside the support plate (3), a first motor (5) is installed at the front end of the bracket (1), a first bidirectional screw (6) is installed at the output end of the first motor (5), and angle steel is threadedly installed at both ends of the first bidirectional screw (6). (7), and the angle steel (7) is attached to the side of the top of the bracket (1), a scale line (8) is provided along the length direction of the end of the bracket (1) close to the first motor (5), a positioning mechanism (9) is provided at the position of the top of the bracket (1) close to the first bidirectional screw (6), a second motor (10) is installed at the middle position of the top of the bracket (1), a cylinder (11) is installed at the output end of the second motor (10), and an end plate (12) is installed at the output end of the cylinder (11), and the end plate (12) is perpendicular to the horizontal plane.

2. A paper preloading mechanism for a sheet-fed printing press according to claim 1, Features: Two groups of guide rails (2) are arranged in parallel, and rollers cooperating with the guide rails (2) are fixed at the bottom of the support plate (3).

3. The paper preloading mechanism of a sheet-fed printing press according to claim 1, Features: Rubber blocks are fixed to the bottom ends of the support rods at the four corners of the bottom of the bracket (1), and the bottoms of the rubber blocks are provided with anti-slip grooves.

4. The paper preloading mechanism of a sheet-fed printing press according to claim 1, Features: The positioning mechanism (9) comprises a third motor (13), a second bidirectional screw (14), and a limit plate (15). The third motor (13) is mounted on the top of the bracket (1). The output end of the third motor (13) is mounted with the second bidirectional screw (14), and both ends of the second bidirectional screw (14) are threadedly mounted with the limit plate (15). The bottom end of the limit plate (15) is attached to the top of the bracket (1), and the limit plate (15) is located above the first bidirectional screw (6). The bottom of the limit plate (15) is lower than the horizontal plane where the top end of the angle steel (7) is located.

5. The paper preloading mechanism of a sheet-fed printing press according to claim 4, Features: The outer side surface of the limiting plate (15) and the inner side surface of the angle steel (7) are parallel to each other, and the limiting plate (15) is attached to the outer side of the scale line (8).

6. The paper preloading mechanism of a sheet-fed printing press according to claim 1, Features: The lifting mechanism comprises an installation bin (16), a transverse plate (17), a support block (18), a third bidirectional screw (19) and a trapezoidal block (20). The installation bin (16) is arranged inside the support plate (3). The inner top of the installation bin (16) is provided with a transverse plate (17). The top of the transverse plate (17) is evenly provided with support blocks (18). The ball bearings (4) are located on the top of the support blocks (18). The top of the support plate (3) is provided with a through opening for matching with the support blocks (18). The third bidirectional screw (19) is rotatably installed between the two sides of the installation bin (16). The two ends of the third bidirectional screw (19) are both threadedly installed with trapezoidal blocks (20). The inclined surfaces at the top of the trapezoidal blocks (20) are both fitted with the two ends of the bottom of the transverse plate (17).

7. The paper preloading mechanism of a sheet-fed printing press according to claim 6, Features: Both ends of the third bidirectional screw rod (19) extend to the outside of the support plate (3), and both ends of the third bidirectional screw rod (19) are installed with adjustment disks.

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