Color paper digital printing device

Abstract

The invention discloses a color paper digital printing device, and relates to the field of digital printing. The color paper digital printing device has a printing machine wall and a paper clamping cylinder assembly, a rotating disk is rotatably connected in the printing machine wall, the rotating disk is provided with a rectangular hole, the paper clamping cylinder assembly includes a roller, an arc plate, a rotating cylinder and a movable plug rod, the roller is fixedly connected with a rectangular block, the roller is provided with an arc groove and a pressure groove, the roller is fixedly connected with a rotating shaft, the arc plate is rotatably connected with the roller, the arc plate is provided with a pressure strip, the pressure strip is provided with a plug hole, the rotating cylinder is rotatably sleeved on the rotating shaft, the rotating cylinder is provided with a connecting plate, the connecting plate is provided with a movable hole, the movable plug rod is movably sleeved in the movable hole, the movable plug rod is provided with a convex ring, and the movable plug rod is movably sleeved with a first spring. The color paper digital printing device has the function of being able to easily fix one end of a printed paper.

Description

Technical Field

[0001] The invention relates to the technical field of digital printing, in particular to a color paper digital printing device. Background Art

[0002] With the development of society and technology, traditional printers can no longer meet current usage requirements, and digital printing devices are the replacement products of traditional printers, so a color paper digital printing device is needed.

[0003] The existing color paper digital printing device has the following shortcomings. Some color paper digital printing devices print on a piece of paper with a very long overall length. The digital printing device is equipped with a roller that can wind up the printed paper. However, when enough paper has been wound on the roller, the paper and the roller need to be removed and a new roller needs to be installed on the digital printing device. It is also necessary to fix one end of the printed paper to the roller before the paper can be wound. However, the fixing between the paper and the roller is relatively cumbersome and urgently needs to be improved. In view of the shortcomings of the prior art, the present invention discloses a color paper digital printing device to solve the above problems. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention discloses a color paper digital printing device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a color paper digital printing device, comprising:

[0006] A printing machine wall, a turntable is rotatably connected inside the printing machine wall, and a rectangular hole is opened on the front of the turntable;

[0007] The paper clamping cylinder assembly comprises a roller, an arc plate, a rotating cylinder and a movable plug rod;

[0008] A rectangular block is fixedly connected to the back of the drum, and the rectangular block is slidably inserted in the rectangular hole. An arc groove and a pressure groove are opened on the outer circular surface of the drum, and a rotating shaft is fixedly connected to the front of the drum.

[0009] The arc plate is rotatably connected to the drum, a pressure strip is arranged at one end of the arc plate, and a plug-in hole is arranged on the front side of the pressure strip;

[0010] The rotating cylinder is rotatably sleeved on the rotating shaft, a connecting plate is arranged on the outer circumferential surface of the rotating cylinder, and a movable hole is opened on the front side of the connecting plate;

[0011] The movable insert rod is movably sleeved in the movable hole, a convex ring is arranged on the outer circular surface of the movable insert rod, and a first spring is movably sleeved on the outer circular surface of the movable insert rod.

[0012] Preferably, the arc groove and the pressing groove are arranged to be in communication with each other, and the arc groove and the pressing groove are arranged to be in communication with the front and back sides of the drum.

[0013] Preferably, two connecting seats are fixedly connected in the arc groove, and the two connecting seats are respectively arranged near the front and back sides of the drum. Two rotating rods are arranged at the other end of the arc plate, and the two rotating rods are respectively rotatably connected in the two connecting seats.

[0014] Preferably, the rotating shaft is arranged below the pressing groove, the connecting plate is arranged at a position close to the front side of the rotating cylinder, and the movable hole penetrates to the back side of the connecting plate.

[0015] Preferably, the convex ring is arranged at a position close to the back side of the movable insertion rod, one end of the first spring abuts against the back side of the movable hole, and the other end of the first spring abuts against the front side of the convex ring.

[0016] Preferably, fixing holes are provided on the upper and lower surfaces of the rectangular hole, a receiving groove is provided on the back of the rectangular block, the receiving groove is arranged to be connected with the rectangular plug hole, and connecting holes are provided on the upper and lower surfaces of the rectangular block, and the connecting holes are arranged to be connected with the receiving groove.

[0017] Preferably, the paper clamping tube assembly also includes a rectangular insertion rod and two fixed rods, the fixed rod is slidably connected in the rectangular insertion hole, the two fixed rods are respectively slidably connected in the two connecting holes, the lower surface of the fixed rod is fixedly connected with a hemispherical block, and the outer circular surface of the fixed rod is movably sleeved with a second spring.

[0018] Preferably, a baffle rod is fixedly connected to the front side of the drum, and the front side of the baffle rod is flush with the front side of the connecting plate.

[0019] Preferably, the method comprises the following steps:

[0020] Step 1: Slide and insert the rectangular block into the rectangular hole to install the paper clamping tube assembly on the turntable. The rotation of the turntable can drive the rotation of the paper clamping tube assembly;

[0021] Step 2: Pull the movable plug rod forward to disengage the movable plug rod from the plug hole. At this time, the first spring is in a compressed state. The rotating cylinder rotates the movable plug rod counterclockwise at a certain angle, and the arc plate is rotated on the cylinder so that the pressure strip is no longer in the pressure groove. Then put one end of the printed paper into the pressure groove, and then rotate the arc plate so that the pressure strip is in the pressure groove to press one end of the paper.

[0022] Step 3: Rotate the rotating cylinder with the movable plug rod clockwise. When the movable plug rod is aligned with the plug hole, the movable plug rod can be automatically inserted into the plug hole under the elastic action of the first spring, so that the arc plate is fixed, and one end of the paper is pressed and fixed between the pressure strip and the pressure groove.

[0023] The present invention discloses a color paper digital printing device, which has the following beneficial effects:

[0024] The color paper digital printing device is provided with a printing machine wall and a paper clamping cylinder assembly. The turntable can drive the paper clamping cylinder assembly to rotate. After the paper is printed, it is wound on the paper clamping cylinder assembly. One end of the paper needs to be fixed on the paper clamping cylinder assembly, the movable plug rod is pulled forward and the rotating cylinder is rotated counterclockwise. At this time, the first spring is in a compressed state, and then the arc plate is rotated and one end of the paper is placed in the pressing groove. The arc plate is rotated so that the pressure strip is in the plug-in hole to press one end of the paper, and the rotating cylinder is rotated clockwise. When the movable plug rod is aligned with the plug-in hole, the movable plug rod is automatically inserted into the plug-in hole under the elastic action of the first spring, so that the arc plate is fixed. At this time, one end of the paper has been fixed on the paper clamping cylinder assembly, and the device has the function of facilitating the fixing of one end of the printed paper.

[0025] The color paper digital printing device is provided with a fixing hole, a roller, a rectangular insertion rod and a fixing rod. When the rectangular block is inserted into the rectangular hole, the rectangular insertion rod is moved backward so that the two fixing rods are respectively inserted into the two fixing holes, so that the rectangular block can be fixed in the rectangular hole. At this time, the two second springs are in a compressed state. The rectangular insertion rod is pulled forward. Under the elastic action of the second springs, the two fixing rods are moved in a direction approaching each other, so that the two fixing rods are no longer inserted into the two fixing holes, and the rectangular block can be disassembled. The device has the function of facilitating the fixing of the rectangular block in the rectangular hole and facilitating disassembly.

[0026] The color paper digital printing device is provided with a baffle rod, which is on the path of the counterclockwise rotation of the rotating cylinder. When the rotating cylinder rotates counterclockwise by a small angle, the connecting plate will contact the baffle rod. In this way, when the movable plug rod needs to be inserted into the plug hole, it is only necessary to rotate the rotating cylinder clockwise by a small angle, so that the movable plug rod can be inserted into the plug hole more quickly. The device has the function of enabling the movable plug rod to be inserted into the plug hole more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the printing machine wall of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the paper clamping tube assembly of the present invention;

[0030] Figure 4 It is a front structural schematic diagram of the drum of the present invention;

[0031] Figure 5 It is a schematic diagram of the back structure of the drum of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the curved plate of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the rotating cylinder and the movable inserting rod of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the rectangular plug rod and the fixing rod of the present invention.

[0035] In the figure: 1. printing machine wall; 101. turntable; 102. rectangular hole; 103. fixed hole; 2. paper clamping cylinder assembly; 3. roller; 301. rectangular block; 302. arc groove; 303. pressing groove; 304. connecting seat; 305. rotating shaft; 306. rectangular plug hole; 307. accommodating groove; 308. connecting hole; 309. blocking rod; 4. arc plate; 401. pressure strip; 402. rotating rod; 403. plug hole; 5. rotating cylinder; 501. connecting plate; 502. movable hole; 6. movable plug rod; 601. convex ring; 602. first spring; 7. rectangular plug rod; 8. fixed rod; 801. hemispherical block; 802. second spring. DETAILED DESCRIPTION

[0036] The embodiment of the present invention discloses a color paper digital printing device, such as Figure 1-8 As shown, including:

[0037] The printing machine wall 1 has a turntable 101 rotatably connected therein. The turntable 101 can rotate inside the printing machine wall 1 , and a rectangular hole 102 is formed on the front of the turntable 101 .

[0038] The paper clamping cylinder assembly 2 comprises a roller 3, an arc plate 4, a rotating cylinder 5 and a movable inserting rod 6.

[0039] A rectangular block 301 is fixedly connected to the back of the roller 3, and the rectangular block 301 is slidably inserted in the rectangular hole 102. When the rectangular block 301 is inserted in the rectangular hole 102, the rotation of the turntable 101 can drive the paper clamping tube assembly 2 to rotate. An arc groove 302 and a pressure groove 303 are provided on the outer circular surface of the roller 3. The arc groove 302 and the pressure groove 303 are arranged to be connected. The arc groove 302 and the pressure groove 303 are arranged to be connected with the front and back of the roller 3. A rotating shaft 305 is fixedly connected to the front of the roller 3, and the rotating shaft 305 is arranged below the pressure groove 303.

[0040] The arc plate 4 is rotatably connected to the drum 3, and two connecting seats 304 are fixedly connected in the arc groove 302. The two connecting seats 304 are respectively arranged at positions close to the front and back of the drum 3. Two rotating rods 402 are arranged at the other end of the arc plate 4, and the two rotating rods 402 are rotatably connected in the two connecting seats 304 respectively.

[0041] A pressure strip 401 is provided at one end of the arc plate 4. When the inner circular surface of the arc plate 4 fits with the arc groove 302, the pressure strip 401 just fits with the pressing groove 303, so as to press and fix the paper. A plug-in hole 403 is provided on the front side of the pressure strip 401.

[0042] The rotating cylinder 5 is rotatably sleeved on the rotating shaft 305, and a limiting plate is fixed on the front side of the rotating shaft 305 to prevent the rotating cylinder 5 from moving forward and backward on the rotating shaft 305. A connecting plate 501 is provided on the outer circumferential surface of the rotating cylinder 5, and the connecting plate 501 is arranged at a position close to the front side of the rotating cylinder 5. A movable hole 502 is opened on the front side of the connecting plate 501, and the movable hole 502 penetrates to the back side of the connecting plate 501.

[0043] The movable plug rod 6 is movably sleeved in the movable hole 502, and a convex ring 601 is provided on the outer circumferential surface of the movable plug rod 6. The convex ring 601 is arranged at a position close to the back side of the movable plug rod 6. When the movable plug rod 6 is inserted into the insertion hole 403, the arc plate 4 is fixed and cannot rotate. A first spring 602 is movably sleeved on the outer circumferential surface of the movable plug rod 6, and one end of the first spring 602 is abutted against the back side of the movable hole 502, and the other end of the first spring 602 is abutted against the front side of the convex ring 601.

[0044] The device is provided with a printing machine wall 1 and a paper clamping cylinder assembly 2, and the turntable 101 can drive the paper clamping cylinder assembly 2 to rotate. After the paper is printed, it is wound on the paper clamping cylinder assembly 2. One end of the paper needs to be fixed on the paper clamping cylinder assembly 2, and the movable plug rod 6 is pulled forward and the rotating cylinder 5 is rotated counterclockwise. At this time, the first spring 602 is in a compressed state, and then the arc plate 4 is rotated and one end of the paper is placed in the pressing groove 303. When the arc plate 4 is rotated, the pressure strip 401 is placed in the plug hole 403 to press one end of the paper, and the rotating cylinder 5 is rotated clockwise. When the movable plug rod 6 is aligned with the plug hole 403, the movable plug rod 6 is automatically inserted into the plug hole 403 under the elastic action of the first spring 602, so that the arc plate 4 is fixed. At this time, one end of the paper has been fixed on the paper clamping cylinder assembly 2, and the device has the function of facilitating the fixing of one end of the printed paper.

[0045] The upper and lower surfaces of the rectangular hole 102 are provided with fixing holes 103, the back of the rectangular block 301 is provided with a receiving groove 307, the receiving groove 307 is arranged to be connected with the rectangular plug hole 306, and the upper and lower surfaces of the rectangular block 301 are provided with connecting holes 308, and the connecting holes 308 are arranged to be connected with the receiving groove 307.

[0046] The paper clamping tube assembly 2 also includes a rectangular insertion rod 7 and two fixed rods 8. The fixed rod 8 is slidably connected in the rectangular insertion hole 306. The two fixed rods 8 are slidably connected in the two connecting holes 308 respectively. The lower surface of the fixed rod 8 is fixedly connected with a hemispherical block 801. The outer circular surface of the fixed rod 8 is movably sleeved with a second spring 802. The hemispherical blocks 801 of the two fixed rods 8 are close to each other, and the hemispherical blocks 801 are both in the accommodating groove 307. One end of the second spring 802 is against the accommodating groove 307, and the other end of the second spring 802 is against the hemispherical block 801. Moving the rectangular insertion rod 7 backward can make the two fixed rods 8 move upward and downward respectively. When the rectangular insertion rod 7 is pulled previously, the two fixed rods 8 can be brought close to each other through the elasticity of the second spring 802.

[0047] The device is provided with a fixing hole 103, a roller 3, a rectangular insertion rod 7 and a fixing rod 8. When the rectangular block 301 is inserted into the rectangular hole 102, the rectangular insertion rod 7 is moved backward so that the two fixing rods 8 are respectively inserted into the two fixing holes 103, and the rectangular block 301 can be fixed in the rectangular hole 102. At this time, the two second springs 802 are in a compressed state. The rectangular insertion rod 7 is pulled forward. Under the elastic action of the second springs 802, the two fixing rods 8 move in a direction close to each other, so that the two fixing rods 8 are no longer inserted into the two fixing holes 103, and the rectangular block 301 can be disassembled. The device has the function of facilitating the fixing of the rectangular block 301 in the rectangular hole 102 and facilitating disassembly.

[0048] A blocking rod 309 is fixedly connected to the front of the drum 3. The blocking rod 309 is on the path of the counterclockwise rotation of the rotating drum 5. When the rotating drum 5 rotates counterclockwise by a small angle, the connecting plate 501 will contact the blocking rod 309, and the front of the blocking rod 309 will be flush with the front of the connecting plate 501.

[0049] The device is provided with a blocking rod 309, and the blocking rod 309 is on the path of the counterclockwise rotation of the rotating cylinder 5. After the rotating cylinder 5 rotates counterclockwise by a small angle, the connecting plate 501 will contact the blocking rod 309. In this way, when the movable plug rod 6 needs to be inserted into the plug hole 403, it is only necessary to rotate the rotating cylinder 5 clockwise by a small angle, so that the movable plug rod 6 can be inserted into the plug hole 403 more quickly. The device has the function of enabling the movable plug rod 6 to be inserted into the plug hole 403 more quickly.

[0050] Working principle: When the device is in use, the rectangular block 301 on the roller 3 is slidably inserted into the rectangular hole 102, the turntable 101 can rotate in the printing machine wall 1 and drive the rotation of the paper clamping roller assembly 2. After the paper is printed, it is wound on the paper clamping roller assembly 2. When enough paper is wound on the paper clamping roller assembly 2, the paper clamping roller assembly 2 and the paper thereon need to be removed, and then a new paper clamping roller assembly 2 is installed on the turntable 101, and the paper needs to be fixed on the paper clamping roller assembly 2.

[0051] The user pulls the movable plug rod 6 forward to disengage the movable plug rod 6 from the plug hole 403, and rotates the rotating cylinder 5 counterclockwise by a certain angle. The movable plug rod 6 is movably connected to the movable hole 502 and can move with the rotation of the rotating cylinder 5, so that the back of the movable plug rod 6 is against the front of the cylinder 3. At this time, the first spring 602 is between the connecting plate 501 and the convex ring 601 and is in a compressed state. The arc plate 4 can be rotated on the cylinder 3 through the cooperation of the rotating rod 402 and the connecting seat 304, so that the pressure strip 401 is no longer in the pressing groove 303, one end of the paper is placed in the pressing groove 303, and then the arc plate 4 is rotated to make the inner circular surface of the arc plate 4 fit with the arc groove 302. At this time, the pressure strip 401 is in the pressing groove 303 and presses one end of the paper.

[0052] Then, the rotating cylinder 5 is rotated clockwise, and the movable plug rod 6 moves with the rotation of the rotating cylinder 5. When the movable plug rod 6 is aligned with the insertion hole 403, the elasticity of the first spring 602 allows the movable plug rod 6 to be automatically inserted into the insertion hole 403, so that the arc plate 4 can be fixed, making the arc plate 4 unable to rotate. At this time, one end of the paper has been pressed and fixed between the pressure strip 401 and the pressure groove 303, so that one end of the printed paper can be fixed conveniently, and the device has the function of conveniently fixing one end of the printed paper.

[0053] The device is provided with a printing machine wall 1 and a paper clamping cylinder assembly 2, and the turntable 101 can drive the paper clamping cylinder assembly 2 to rotate. After the paper is printed, it is wound on the paper clamping cylinder assembly 2. One end of the paper needs to be fixed on the paper clamping cylinder assembly 2, and the movable plug rod 6 is pulled forward and the rotating cylinder 5 is rotated counterclockwise. At this time, the first spring 602 is in a compressed state, and then the arc plate 4 is rotated and one end of the paper is placed in the pressing groove 303. When the arc plate 4 is rotated, the pressure strip 401 is placed in the plug hole 403 to press one end of the paper, and the rotating cylinder 5 is rotated clockwise. When the movable plug rod 6 is aligned with the plug hole 403, the movable plug rod 6 is automatically inserted into the plug hole 403 under the elastic action of the first spring 602, so that the arc plate 4 is fixed. At this time, one end of the paper has been fixed on the paper clamping cylinder assembly 2, and the device has the function of facilitating the fixing of one end of the printed paper.

[0054] When the rectangular block 301 is inserted into the rectangular hole 102, the rotation of the turntable 101 can drive the rotation of the paper clamping tube assembly 2, but the rectangular block 301 may move forward and backward in the rectangular hole 102, so the rectangular block 301 needs to be fixed in the rectangular hole 102, because the rectangular plug rod 7 can slide forward and backward in the rectangular plug hole 306, the two fixing rods 8 are respectively slidably connected in the two connecting holes 308, and the two hemispherical blocks 801 are both in the accommodating groove 307 and close to each other. When the rectangular block 301 is inserted into the rectangular hole 102, the rectangular plug rod 7 is moved backward. The back side of the rectangular plug rod 7 is wedge-shaped. When the back side of the rectangular plug rod 7 contacts the two hemispherical blocks 801, the two fixing rods 8 can be moved upward and downward respectively, so that the two fixing rods 8 are respectively inserted into the two fixing holes 103 opened in the rectangular hole 102, so that the rectangular block 301 can be fixed in the rectangular hole 102.

[0055] A second spring 802 is sleeved on the fixing rod 8, and the two ends of the second spring 802 are respectively against the hemispherical block 801 and the accommodating groove 307. When the hemispherical block 801 is inserted into the fixing hole 103, the second spring 802 is in a compressed state. When it is necessary to remove the paper clamping tube assembly 2 from the rectangular hole 102, the rectangular insertion rod 7 is pulled forward so that the rectangular insertion rod 7 is no longer in contact with the two hemispherical blocks 801. Through the elastic action of the second spring 802, the two hemispherical blocks 801 move toward each other, so that the two fixing rods 8 are no longer inserted in the fixing hole 103, and the rectangular block 301 can be removed from the rectangular hole 102. The device has the function of facilitating the fixing of the rectangular block 301 in the rectangular hole 102 and facilitating disassembly.

[0056] The device is provided with a fixing hole 103, a roller 3, a rectangular insertion rod 7 and a fixing rod 8. When the rectangular block 301 is inserted into the rectangular hole 102, the rectangular insertion rod 7 is moved backward so that the two fixing rods 8 are respectively inserted into the two fixing holes 103, and the rectangular block 301 can be fixed in the rectangular hole 102. At this time, the two second springs 802 are in a compressed state. The rectangular insertion rod 7 is pulled forward. Under the elastic action of the second springs 802, the two fixing rods 8 move in a direction close to each other, so that the two fixing rods 8 are no longer inserted into the two fixing holes 103, and the rectangular block 301 can be disassembled. The device has the function of facilitating the fixing of the rectangular block 301 in the rectangular hole 102 and facilitating disassembly.

[0057] When the movable insertion rod 6 is pulled forward and the rotating drum 5 is rotated counterclockwise, a blocking rod 309 is provided on the front side of the drum 3. The blocking rod 309 is on the path of the rotating drum 5 rotating counterclockwise. The blocking rod 309 can contact with the connecting plate 501, so that the rotating drum 5 cannot rotate a large angle, so that the movable insertion rod 6 is closer to the pressing groove 303. When the pressure strip 401 is in the pressing groove 303, it is only necessary to rotate the rotating drum 5 clockwise at a small angle, so that the movable insertion rod 6 can be quickly inserted into the plug-in hole 403. The device has the function of enabling the movable insertion rod 6 to be inserted into the plug-in hole 403 faster.

[0058] The device is provided with a blocking rod 309, and the blocking rod 309 is on the path of the counterclockwise rotation of the rotating cylinder 5. After the rotating cylinder 5 rotates counterclockwise by a small angle, the connecting plate 501 will contact the blocking rod 309. In this way, when the movable plug rod 6 needs to be inserted into the plug hole 403, it is only necessary to rotate the rotating cylinder 5 clockwise by a small angle, so that the movable plug rod 6 can be inserted into the plug hole 403 more quickly. The device has the function of enabling the movable plug rod 6 to be inserted into the plug hole 403 more quickly.

[0059] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A color paper digital printing device, characterized in that: include: A printing machine wall (1), wherein a rotating disk (101) is rotatably connected inside the printing machine wall (1), and a rectangular hole (102) is formed on the front surface of the rotating disk (101); A paper clamping cylinder assembly (2), the paper clamping cylinder assembly (2) comprising a roller (3), an arc-shaped plate (4), a rotating cylinder (5) and a movable insertion rod (6); A rectangular block (301) is fixedly connected to the back of the roller (3), the rectangular block (301) is slidably inserted into the rectangular hole (102), an arc groove (302) and a pressing groove (303) are formed on the outer circumferential surface of the roller (3), and a rotating shaft (305) is fixedly connected to the front of the roller (3); The arc-shaped plate (4) is rotatably connected to the roller (3); a pressure strip (401) is provided at one end of the arc-shaped plate (4); and a plug-in hole (403) is provided on the front side of the pressure strip (401); The rotating cylinder (5) is rotatably sleeved on the rotating shaft (305); a connecting plate (501) is provided on the outer circumferential surface of the rotating cylinder (5); and a movable hole (502) is provided on the front surface of the connecting plate (501); The movable insertion rod (6) is movably sleeved in the movable hole (502), a convex ring (601) is provided on the outer circumferential surface of the movable insertion rod (6), and a first spring (602) is movably sleeved on the outer circumferential surface of the movable insertion rod (6); The upper and lower surfaces of the rectangular hole (102) are both provided with fixing holes (103); the back of the rectangular block (301) is provided with a receiving groove (307); the receiving groove (307) is arranged to communicate with the rectangular insertion hole (306); the upper and lower surfaces of the rectangular block (301) are both provided with connecting holes (308); the connecting holes (308) are arranged to communicate with the receiving groove (307); The paper clamping tube assembly (2) further comprises a rectangular insertion rod (7) and two fixed rods (8), wherein the fixed rod (8) is slidably connected in the rectangular insertion hole (306), and the two fixed rods (8) are respectively slidably connected in the two connection holes (308), the lower surface of each of the fixed rods (8) is fixedly connected with a hemispherical block (801), and the outer circumferential surface of each of the fixed rods (8) is movably sleeved with a second spring (802); A blocking rod (309) is fixedly connected to the front of the drum (3), and the front of the blocking rod (309) is flush with the front of the connecting plate (501).

2. The color paper digital printing device according to claim 1, characterized in that: The arc-shaped groove (302) and the pressing groove (303) are arranged to communicate with each other, and the arc-shaped groove (302) and the pressing groove (303) are arranged to communicate with the front and back sides of the roller (3).

3. The color paper digital printing device according to claim 1, characterized in that: Two connection seats (304) are fixedly connected in the arc groove (302), and the two connection seats (304) are respectively arranged at positions close to the front and back sides of the drum (3). Two rotating rods (402) are arranged at the other end of the arc plate (4), and the two rotating rods (402) are respectively rotatably connected in the two connection seats (304).

4. The color paper digital printing device according to claim 1, characterized in that: The rotating shaft (305) is arranged below the pressing groove (303), the connecting plate (501) is arranged at a position close to the front of the rotating cylinder (5), and the movable hole (502) penetrates to the back of the connecting plate (501).

5. The color paper digital printing device according to claim 1, characterized in that: The convex ring (601) is arranged at a position close to the back of the movable insertion rod (6), one end of the first spring (602) abuts against the back of the movable hole (502), and the other end of the first spring (602) abuts against the front of the convex ring (601).

6. A method for using a color paper digital printing device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Slidingly inserting the rectangular block (301) into the rectangular hole (102) to install the paper clamping tube assembly (2) on the rotating disk (101), the rotation of the rotating disk (101) can drive the rotation of the paper clamping tube assembly (2); Step 2: Pull the movable plug rod (6) forward to disengage the movable plug rod (6) from the plug hole (403). At this time, the first spring (602) is in a compressed state. The rotating cylinder (5) rotates the movable plug rod (6) counterclockwise by a certain angle, and the arc plate (4) is rotated on the roller (3) so that the pressure strip (401) is no longer in the pressure groove (303). Then, one end of the printed paper is placed in the pressure groove (303), and then the arc plate (4) is rotated so that the pressure strip (401) is in the pressure groove (303) to press one end of the paper. Step 3: The rotating cylinder (5) is rotated clockwise with the movable plug rod (6). When the movable plug rod (6) is aligned with the plug hole (403), the movable plug rod (6) can be automatically inserted into the plug hole (403) under the elastic action of the first spring (602), so that the arc plate (4) is fixed, and one end of the paper is pressed and fixed between the pressure strip (401) and the pressure groove (303).

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