Paper conveying mechanism for printing of four-color printing machine

Abstract

The utility model discloses a paper feeding mechanism for printing of a four-color printing machine, which belongs to the field of four-color printing machine equipment and comprises a four-color printing machine body. A paper conveying platform is mounted on one side of the four-color printing machine body; and a paper conveying mechanism is assembled on the paper conveying platform. According to the paper conveying mechanism for printing of the four-color printing machine, the second paper conveying and pressing wheel which is arranged in a floating mode can always extrude and limit paper, so that it is ensured that the paper is properly pressed down in the conveying process and always kept flat, and then the printing effect is improved; during the period, the second paper conveying and pressing wheel is elastically supported by the connecting block and is in a floating state, so that after the downward pressing height of the first paper conveying and pressing wheel is adjusted, the second paper conveying and pressing wheel which is arranged in a floating manner can carry out self-adaptive height adjustment when paper with different thicknesses is supported; therefore, the second paper conveying and pressing wheel and the first paper conveying and pressing wheel are always in contact with the paper and complete rolling of the paper.

Description

Technical Field

[0001] The utility model belongs to the field of four-color printing press equipment, and in particular relates to a paper feeding mechanism for a four-color printing press. Background Art

[0002] A four-color printing press is a device used for graphic arts printing, typically using four basic colors to print images and text; these four colors are cyan, magenta, yellow, and black. This four-color model is known as CMYK. By adding these four basic colors in varying degrees, a wide range of other colors can be produced, resulting in high-quality, colorful prints.

[0003] The paper feed roller (also called feed roller or transfer roller) in a four-color printing press is an important component. It is mainly used to ensure that the paper is smoothly transferred from the feeding area to the printing area during the printing process, while providing appropriate pressure to achieve the best ink transfer effect. The paper feed roller can ensure that each piece of paper can enter the machine smoothly and accurately and maintain its position to avoid misalignment and overlap, thereby improving production efficiency.

[0004] In the actual paper printing and conveying process, the traditional paper feeding pinch wheel is difficult to feed paper of different thicknesses. During the paper pressing process, the paper pressing pressure is difficult to be adaptively adjusted, resulting in thinner paper being broken due to excessive pressure, and thicker paper being stuck between the upper and lower paper feeding pinch wheels and difficult to move forward. The solution is usually to replace the pinch wheel and change the overall diameter of the pinch wheel or to select equipment with pressure adjustment. The operation method of replacing the pinch wheel is relatively cumbersome during the production process and affects the production progress. The overall replacement equipment has a high cost of use and is difficult to adapt to the batch demand of small factories. Considering the actual production operation efficiency and use cost, a paper feeding mechanism for a four-color printing press is proposed to address the above problems. Utility Model Content

[0005] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the utility model provides a paper feeding mechanism for a four-color printing press, which has the advantages of being able to quickly adjust the pressure according to different paper thicknesses, improve paper feeding smoothness, and adapt to papers of different thicknesses.

[0006] To achieve the above-mentioned object, the utility model provides a paper feeding mechanism for printing of a four-color printing press, comprising a four-color printing press body;

[0007] A paper conveying platform is installed on one side of the four-color printing machine body; a paper conveying mechanism is assembled on the paper conveying platform;

[0008] The paper feeding mechanism includes four vertical beams arranged vertically on the upper end surface of the paper feeding platform, and the four vertical beams are arranged in a rectangular distribution and are arranged in groups of two on both sides of the paper feeding platform;

[0009] Two adjacent vertical beams are each provided with a linear guide rail on their opposite sides, a guide rail slider is provided between the two linear guide rails for sliding engagement, a ball bearing ring is provided in each of the two guide rail sliders, and a first paper feeding and pressing wheel is provided between the two ball bearing rings;

[0010] A floating box is installed at the lower end surface of the paper conveying platform. The floating box is arranged in a rectangular box body with an opening formed on the top. The floating box has a rectangular groove and a number of spring positioning seats are installed therein. Compression springs are installed on the several spring positioning seats; a connecting block is commonly supported on the several compression springs.

[0011] As a further improvement of the present invention, two floating seats are installed on the upper end surface of the connecting block, and bearing seats are installed in the two floating seats; a rotating rod is jointly assembled in the two bearing seats, and a second paper feed pressure wheel is provided on the outside of the rotating rod, and the second paper feed pressure wheel and the first paper feed pressure wheel are arranged to be opposite to each other in the upper and lower directions.

[0012] As a further improvement of the present invention, the connecting block is slidably mounted in the floating box and its two side walls are in contact with the inner wall of the floating box.

[0013] As a further improvement of the present invention, a positioning plate is vertically installed between two adjacent vertical beams, a screw rod is rotatably provided on the positioning plate, and the bottom end of the screw rod is engaged with the top guide rail slider.

[0014] As a further improvement of the present invention, a handle is sleeved on the top of the screw rod, and a rubber sleeve is sleeved on the outside of the handle.

[0015] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0016] The paper feeding mechanism for a four-color printing press of the present invention, in actual use, through the mutual movement cooperation of multiple structures arranged in the paper feeding mechanism, the second paper feeding pinch wheel which is arranged in a floating manner can cooperate with the first paper feeding pinch wheel which is arranged in a rotatable manner to always squeeze and limit the paper, thereby ensuring that the paper is properly pressed down during the conveying process and always remains flat, thereby improving the printing effect; during this period, since the second paper feeding pinch wheel is elastically supported by the connecting block, it itself is in a floating state. When the downward pressure height adjustment of the first paper feeding pinch wheel is completed, the second paper feeding pinch wheel which is arranged in a floating manner can perform adaptive height adjustment when supporting papers of different thicknesses, thereby making the second paper feeding pinch wheel and the first paper feeding pinch wheel always in contact with the paper and completing the rolling of the paper, and finally making the paper feeding mechanism of the present application capable of adaptively conveying and pressurizing papers of different thicknesses.

[0017] The paper feeding mechanism for a four-color printing press of the present invention cooperates with the mutual movement of multiple structures arranged in the paper feeding mechanism, so that the user can fine-tune the height of the first paper feeding pressure wheel by turning the handle; by adjusting the height of the first paper feeding pressure wheel, the first paper feeding pressure wheel and the second paper feeding pressure wheel can adapt to the squeezing and conveying of papers of different thicknesses, and at the same time, by limiting the downward pressure height, the first paper feeding pressure wheel can avoid idling during the conveying process, and can effectively reduce the pressure applied to the paper, preventing tearing or deformation due to excessive pressure; in use, the paper feeding mechanism of the present application has a simple overall structure and strong practicality. At the same time, compared with the paper pressing pressure adjustment method used in traditional four-color printing presses, the overall use is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall installation structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall installation structure of the paper conveying platform and paper conveying mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the second paper feeding and pressing wheel and the rotating rod of the utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the floating seat of the utility model in the floating box.

[0022] In all the drawings, the same figure marks represent the same technical features, specifically: 1. Four-color printing press body; 2. Paper conveying platform; 3. Paper feeding mechanism; 31. Vertical beam; 32. Linear guide rail; 33. Guide rail slider; 34. Ball bearing ring; 35. First paper feeding pressure wheel; 36. Positioning plate; 37. Screw; 38. Handle; 39. Floating box; 310. Spring positioning seat; 311. Compression spring; 312. Connecting block; 313. Floating seat; 314. Bearing seat; 315. Rotating rod; 316. Second paper feeding pressure wheel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example

[0025] Depend on Figure 1-4 Provided is a paper feeding mechanism for a four-color printing press, comprising a four-color printing press body 1;

[0026] A paper conveying platform 2 is installed on one side of the four-color printing machine body 1; a paper conveying mechanism 3 is assembled on the paper conveying platform 2;

[0027] The paper feeding mechanism 3 includes four vertical beams 31 vertically arranged on the upper end surface of the paper feeding platform 2. The four vertical beams 31 are arranged in a rectangular distribution and are arranged in groups of two on both sides of the paper feeding platform 2.

[0028] Two adjacent vertical beams 31 are each provided with a linear guide rail 32 on its opposite side. A guide rail slider 33 is provided between the two linear guide rails 32 for sliding engagement. A ball bearing ring 34 is provided in each guide rail slider 33. A first paper feeding pinch roller 35 is provided between the two ball bearing rings 34.

[0029] A floating box 39 is installed at the lower end surface of the paper conveying platform 2. The floating box 39 is arranged in a rectangular box body with an opening formed on the top. The floating box 39 has a rectangular groove and a plurality of spring positioning seats 310 are installed therein. Compression springs 311 are installed on the plurality of spring positioning seats 310; a connecting block 312 is commonly supported on the plurality of compression springs 311.

[0030] In this embodiment, in actual use, through the mutual movement and coordination of multiple structures arranged in the paper feeding mechanism 3, the second paper feeding pinch wheel 316 arranged in a floating manner can cooperate with the first paper feeding pinch wheel 35 arranged in a rotating manner to always squeeze and limit the paper, thereby ensuring that the paper is properly pressed down during the conveying process and always remains flat, thereby improving the printing effect; during this period, since the second paper feeding pinch wheel 316 is elastically supported by the connecting block 312, it itself is in a floating state. When the downward pressure height adjustment of the first paper feeding pinch wheel 35 is completed, the second paper feeding pinch wheel 316 arranged in a floating manner can perform adaptive height adjustment when supporting papers of different thicknesses, so that the second paper feeding pinch wheel 316 and the first paper feeding pinch wheel 35 are always in contact with the paper and complete the rolling of the paper, and finally the paper feeding mechanism 3 of this application can adaptively convey and pressurize papers of different thicknesses.

[0031] Furthermore, the mutual movement and coordination of multiple structures arranged in the paper feeding mechanism 3 allows the user to fine-tune the height of the first paper feeding pressure wheel 35 by turning the handle 38; by adjusting the height of the first paper feeding pressure wheel 35, the first paper feeding pressure wheel 35 and the second paper feeding pressure wheel 316 can adapt to the squeezing and conveying of papers of different thicknesses, and at the same time, by limiting the downward pressure height, the first paper feeding pressure wheel 35 can avoid idling during the conveying process, and can effectively reduce the pressure applied to the paper, preventing tearing or deformation due to excessive pressure; in use, the paper feeding mechanism 3 of the present application has a simple overall structure and strong practicality. At the same time, compared with the paper pressing pressure adjustment method used in traditional four-color printing presses, the overall use is simple and the cost is low.

[0032] Specifically, refer to Figure 2-4 Two floating seats 313 are installed on the upper end surface of the connecting block 312, and bearing seats 314 are installed in the two floating seats 313; a rotating rod 315 is jointly assembled in the two bearing seats 314, and a second paper feeding pressure wheel 316 is sleeved on the outside of the rotating rod 315. The second paper feeding pressure wheel 316 and the first paper feeding pressure wheel 35 are arranged opposite to each other in the upper and lower directions.

[0033] In this embodiment, during use, the second paper feeding pinch wheel 316 disposed between the two rotating rods 315 can rotate by the rotation between the bearing seat 314 and the rotating rod 315 .

[0034] Furthermore, through the floating support of the compression spring 311 on the connecting block 312 and the connection between the connecting block 312 and the floating seat 313, the second paper feeding pressure wheel 316 installed between the two floating seats 313 can always be in an elastic floating state, thereby fitting and supporting the lower end surface of the paper, and the set second paper feeding pressure wheel 316 can squeeze the upper end surface of the paper. Through the cooperation of the two, the pressure limiting of the paper can be finally achieved, ensuring that the paper is properly pressed down during the transportation process and always remains flat, thereby improving the printing effect.

[0035] Furthermore, in actual use, the user can lay the paper to be printed flat on the paper conveying platform 2 and pass it between the second paper feed pinch roller 316 and the first paper feed pinch roller 35 in the paper feed mechanism 3. At the same time, one end of the paper can be pulled by the traction mechanism set in the four-color printing press body 1, so that the paper passes through the paper feed mechanism 3 at a uniform speed until it enters the four-color printing press body 1.

[0036] Specifically, refer to Figure 3-4 The connecting block 312 is slidably engaged in the floating box 39 and its two side walls are in contact with the inner wall of the floating box 39.

[0037] In this embodiment, the interlocking connection between the connecting block 312 and the floating box 39 can prevent the connecting block 312 from getting stuck when floating in the floating box 39 and avoid displacement when sliding.

[0038] Specifically, refer to Figure 2-3 A positioning plate 36 is vertically installed between two adjacent vertical beams 31 , and a screw rod 37 is rotatably provided on the positioning plate 36 , and the bottom end of the screw rod 37 is engaged with the top guide rail slider 33 .

[0039] In this embodiment, the provided screw rod 37 can be used to adjust the height of the guide rail slider 33; in use, when the screw rod 37 rotates, it is limited by the connection between the linear guide rail 32 and the guide rail slider 33, so that the guide rail slider 33 engaged at the bottom end of the screw rod 37 can move linearly up and down along the stroke of the screw rod 37.

[0040] Furthermore, the user can control the distance between the first paper feeding pinch wheel 35 and the second paper feeding pinch wheel 316 by controlling the height of the guide rail slider 33 .

[0041] Specifically, refer to Figure 2-3 A handle 38 is sleeved on the top of the screw rod 37, and a rubber sleeve is sleeved on the outside of the handle 38.

[0042] In this embodiment, the handle 38 can be used to control the rotation of the screw rod 37, and the rubber sleeve provided on the outside of the handle 38 can provide the handle 38 with a more comfortable grip.

[0043] The paper feeding mechanism for printing of the four-color printing press of the utility model:

[0044] Step 1: In actual use, the user can lay the paper to be printed flat on the paper conveying platform 2, and at the same time make it pass between the second paper feed pinch roller 316 and the first paper feed pinch roller 35 in the paper feed mechanism 3. At this time, the compression spring 311 floats the connecting block 312, and the connection between the connecting block 312 and the floating seat 313, so that the second paper feed pinch roller 316 installed between the two floating seats 313 can always be in an elastic floating state, thereby fitting and supporting the lower end surface of the paper, and cooperating with the first paper feed pinch roller 35 sliding between the two vertical beams 31, so as to ensure that papers of different thicknesses can be properly squeezed during the conveying process, thereby maintaining smooth conveying. At the same time, the second paper feed pinch roller 316 in a floating setting can be adaptively displaced, thereby ensuring adaptive adjustment and downward pressure on papers of different thicknesses.

[0045] The second step: the user can limit the downward pressure height of the first paper feeding pinch roller 35, so as to cooperate with the floating second paper feeding pinch roller 316 to realize adaptive feeding of paper. During this period, the user turns the handle 38, and the screw rod 37 connected to the handle 38 can rotate synchronously. The linear guide 32 and the guide rail slider 33 limit the connection between the guide rail slider 33, so that the guide rail slider 33 engaged at the bottom end of the screw rod 37 can move linearly up and down along the stroke of the screw rod 37. The user can control the height of the guide rail slider 33 to control the distance between the first paper feeding pinch roller 35 and the second paper feeding pinch roller 316. During the paper feeding process, the first paper feeding pinch roller 35 with fine-tuned spacing can adapt to the squeezing and feeding of paper of different thicknesses between the first paper feeding pinch roller 35 and the second paper feeding pinch roller 316. At the same time, by limiting its maximum height, the first paper feeding pinch roller 35 can avoid idling during the feeding process.

[0046] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paper feed mechanism for a four-color printing press, comprising a four-color printing press body (1), characterized in that: A paper conveying platform (2) is installed on one side of the four-color printing machine body (1); a paper conveying mechanism (3) is installed on the paper conveying platform (2); The paper feeding mechanism (3) comprises four vertical beams (31) vertically arranged on the upper end surface of the paper feeding platform (2), and the four vertical beams (31) are arranged in a rectangular distribution and are arranged in groups of two on both sides of the paper feeding platform (2); Two adjacent vertical beams (31) are both provided with linear guide rails (32) at their opposite sides, a guide rail slider (33) is provided between the two linear guide rails (32) for sliding engagement, a ball bearing ring (34) is provided in the two guide rail sliders (33), and a first paper feeding and pressing wheel (35) is provided between the two ball bearing rings (34); A floating box (39) is installed at the lower end surface of the paper conveying platform (2). The floating box (39) is arranged in a rectangular box body with an opening formed on the top. The floating box (39) is provided with a rectangular groove and a plurality of spring positioning seats (310) are installed therein. Compression springs (311) are installed on the plurality of spring positioning seats (310); and a connecting block (312) is commonly supported on the plurality of compression springs (311).

2. The paper feeding mechanism for a four-color printing press according to claim 1, characterized in that: Two floating seats (313) are installed on the upper end surface of the connecting block (312), and bearing seats (314) are installed in the two floating seats (313); a rotating rod (315) is assembled in the two bearing seats (314), and a second paper feeding and pressing wheel (316) is sleeved on the outside of the rotating rod (315), and the second paper feeding and pressing wheel (316) and the first paper feeding and pressing wheel (35) are arranged in an upper and lower opposite manner.

3. The paper feeding mechanism for a four-color printing press according to claim 1, characterized in that: The connecting block (312) is slidably arranged in the floating box (39), and its two side walls are in contact with the inner wall of the floating box (39).

4. The paper feeding mechanism for a four-color printing press according to claim 1, characterized in that: A positioning plate (36) is vertically installed between two adjacent vertical beams (31), and a screw rod (37) is rotatably provided on the positioning plate (36), and the bottom end of the screw rod (37) is engaged with the top guide rail slider (33).

5. The paper feeding mechanism for printing of a four-color printing press according to claim 4, characterized in that: The top of the screw rod (37) is sleeved with a handle (38), and the outside of the handle (38) is sleeved with a rubber sleeve.

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