A quick dismounting assembly of an ink roller and offset printing machine thereof

Abstract

This utility model relates to the field of offset printing machine technology and discloses an ink roller quick disassembly assembly and the offset printing machine thereof, including: an outer sleeve, a main shaft provided in the notch of the outer sleeve, the main shaft having an anti-detachment structure for locking with the outer sleeve, the anti-detachment structure including a pin, a thrust block and a thrust groove, the inner wall of the outer sleeve having a thrust groove, two thrust blocks symmetrically arranged on the main shaft, the pin being detachably connected to the main shaft, the pin being able to push the two thrust blocks into the thrust groove, by the outer sleeve having an inlet and outlet opening, by the main shaft being lowered perpendicular to the circumference of the outer sleeve, the main shaft is allowed to enter the inner circumference of the outer sleeve from the inlet and outlet opening, the pin is installed with the main shaft, the pin pushes the two thrust blocks into the thrust groove, the thrust groove provides radial and circumferential limiting, realizing the locking and limiting of the main shaft, without having to pull the main shaft out radially along the outer sleeve, greatly improving the convenience of disassembling and assembling the main shaft, and facilitating later replacement and cleaning maintenance.

Description

Technical Field

[0001] This utility model relates to the field of offset printing machine technology, and in particular to an ink roller quick disassembly assembly and the offset printing machine thereof. Background Technology

[0002] The information on the labels on the packaging bags is mainly printed using offset printing.

[0003] A search revealed that an ink transfer device for an offset printing machine (publication number: CN214000990U) is disclosed in the prior art. It includes a base, a rotating shaft rotatably mounted on the base, an abutment plate fixedly mounted on the outer wall of the rotating shaft, and an inclined chamfered surface on the outer wall of the abutment plate. An ink transfer roller is sleeved on the outer wall of the rotating shaft, and an abutment rod is mounted on the end of the ink transfer roller facing the abutment plate. A spring seat is fixedly mounted on the rotating shaft, located on the side of the ink transfer roller away from the abutment plate. A first abutment spring is provided between the spring seat and the ink transfer roller, with both ends of the first abutment spring abutting against the end walls of the spring seat and the ink transfer roller, respectively. The first abutment spring drives the abutment rod to abut against the chamfered surface.

[0004] Existing technology mainly uses a spring seat with elastic connection to abut against the end of the ink roller for limiting. During disassembly and assembly, the spring seat needs to be pushed to slide and cause the ink roller to move radially. During the movement of the ink roller, vibration will be generated. The spring seat with elastic connection is prone to losing its locking effect due to vibration and displacement. Secondly, the radial force generated by the ink roller can easily push the spring seat to slide, resulting in poor installation stability and room for optimization.

[0005] Therefore, we propose a quick-release ink roller assembly and its corresponding offset printing machine. Utility Model Content

[0006] The present invention mainly addresses the technical problem of poor stability in the installation of ink rollers, and provides an ink roller quick disassembly assembly and its offset printing machine.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a quick-release ink roller assembly and its offset printing machine, comprising:

[0008] The outer casing has an opening, and a main shaft is provided within the opening. The main shaft is provided with an anti-detachment structure for locking with the outer casing. The anti-detachment structure includes a pin, a thrust block, and a thrust groove. The inner wall of the outer casing has a thrust groove. Two thrust blocks are symmetrically arranged on the main shaft. The pin is detachably connected to the main shaft. The pin can push the two thrust blocks into the thrust groove, and the thrust blocks can slide within the thrust groove.

[0009] In a preferred embodiment of this invention, the outer sleeve is annular, and the main shaft is cylindrical, with the diameter of the main shaft being equal to the inner diameter of the outer sleeve.

[0010] As a preferred embodiment of this utility model, the anti-detachment structure further includes an inlet / outlet opening, wherein the circumferential surface of the outer jacket is provided with an inlet / outlet opening for entry and exit, and the main shaft can pass through the inlet / outlet opening to enter the interior of the outer jacket.

[0011] As a preferred embodiment of this utility model, the anti-detachment structure further includes a slot and a sliding channel. The slot is formed on the circumferential surface of the main shaft, and a sliding channel is formed on each of the inner walls on both sides of the slot. The pin can be inserted into the slot, and the thrust block is slidably disposed in the sliding channel.

[0012] In a preferred embodiment of this utility model, the thrust block is a rectangular column with one end forming a circle and the other end forming a bevel. The lower end of the pin is chamfered to form a slope, and the sliding channel forms a rectangular groove that fits the thrust block with a clearance. The two sliding channels are distributed in an inward V-shape.

[0013] As a preferred embodiment of this utility model, the anti-detachment structure further includes a reinforcing bolt, and the upper end of the pin is provided with a countersunk hole, through which the reinforcing bolt passes and is threadedly connected to the main shaft.

[0014] An offset printing machine includes a frame, with an ink roller body and a conveyor roller on one side of the frame, and the end of the ink roller body is provided with all of the above-mentioned quick-release components for the ink rollers. The outer sleeve is rotatably connected to the frame, and the ink roller body is fixedly connected to the main shaft.

[0015] This invention provides a quick-release assembly for ink rollers and its application in offset printing. It offers the following advantages:

[0016] 1. This quick-release ink roller assembly and its offset printing machine, by opening an inlet / outlet sleeve, allows the main shaft to enter the inner circumference of the sleeve through the inlet / outlet sleeve by lowering it perpendicular to the circumference of the sleeve. A pin is installed on the main shaft, and the pin pushes two thrust blocks into the thrust grooves. The thrust grooves provide radial and circumferential limits, thereby locking and limiting the main shaft. There is no need to pull the main shaft out radially along the sleeve, which greatly improves the convenience of disassembling and assembling the main shaft and facilitates subsequent replacement, cleaning and maintenance.

[0017] 2. This quick-release ink roller assembly and its offset printing machine, when the main shaft is inserted through the inlet / outlet port, the main shaft can rotate on the inner circumferential surface of the outer sleeve. In order to improve the limiting effect on the main shaft, the pin is placed into the slot and the reinforcing bolt is tightened. The two thrust blocks are pushed by the slope of the bottom of the pin. The thrust blocks slide in the corresponding sliding channel and the end of the thrust block enters the thrust groove. The end of the thrust block in the thrust groove is arc-shaped. The thickness of the thrust block is equal to the depth of the thrust groove. The two thrust blocks can achieve stable limiting of the main shaft, taking into account both the convenience of disassembly and assembly and the stability of locking the main shaft.

[0018] 3. This quick-release ink roller assembly and its offset printing machine: When removing the main shaft, the outer sleeve needs to be rotated so that the inlet / outlet faces upward. After removing the pin, the thrust block slides to the bottom of the sliding channel under gravity. Because the two sliding channels are inwardly oriented (i.e., the sliding channels are inclined), after the thrust block slides to the bottom of the sliding channel, the arc-shaped end of the thrust block disengages from the thrust groove. At this point, the main shaft can be lifted for removal. When the inlet / outlet faces downward, the two sliding channels are outwardly oriented. The component force generated by the gravity of the thrust block will cause the arc-shaped end of the thrust block to be located in the thrust groove, thus preventing the main shaft from falling off. Therefore, the main shaft can only be removed when the inlet / outlet faces upward, avoiding accidental detachment of the main shaft and the main shaft falling due to improper operation, thus improving safety and protection. Attached Figure Description

[0019] Figure 1 This is a perspective view of the quick-release assembly for the ink roller of this utility model;

[0020] Figure 2 This is a perspective view of the outer casing of this utility model;

[0021] Figure 3 This is an assembly drawing of the pin and thrust block with the spindle of this utility model;

[0022] Figure 4 This is one of the overall perspective views of this utility model;

[0023] Figure 5 This is the second overall perspective view of this utility model.

[0024] Legend: 10. Frame; 11. Ink roller body; 20. Outer sleeve; 21. Main shaft; 22. Pin; 23. Thrust block; 24. Thrust groove; 25. Inlet / outlet port; 26. Slot; 27. Sliding channel; 28. Reinforcing bolt. Detailed Implementation

[0025] A quick-release assembly for ink rollers and its offset printing press, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes:

[0026] The outer sleeve 20 has a notch, and a main shaft 21 is provided inside the notch. The main shaft 21 is provided with an anti-detachment structure for locking with the outer sleeve 20. The anti-detachment structure includes a pin 22, a thrust block 23, and a thrust groove 24. The inner wall of the outer sleeve 20 has a thrust groove 24. Two thrust blocks 23 are symmetrically arranged on the main shaft 21. The pin 22 is detachably connected to the main shaft 21. The pin 22 can push the two thrust blocks 23 into the thrust groove 24. The thrust blocks 23 can slide in the thrust groove 24. The outer sleeve 20 is annular, and the main shaft 21 is cylindrical. The diameter of the main shaft 21 is equal to the inner diameter of the outer sleeve 20. The anti-detachment structure also includes an inlet / outlet 25. An inlet / outlet 25 is provided on the circumferential surface of the outer sleeve 20 for entry and exit. The main shaft 21 can pass through the inlet / outlet 25 to enter the interior of the outer sleeve 20.

[0027] In this design, by opening an inlet / outlet port 25 in the outer sleeve 20, the main spindle 21 is lowered perpendicularly to the circumference of the outer sleeve 20, allowing it to enter the inner circumference of the outer sleeve 20 through the inlet / outlet port 25. The pin 22 is then installed on the main spindle 21. The pin 22 pushes two thrust blocks 23 into the thrust groove 24, which provides radial and circumferential limiting, thus locking and limiting the main spindle 21. This eliminates the need to pull the main spindle 21 radially out of the outer sleeve 20, significantly improving the ease of disassembling and assembling the main spindle 21 and facilitating subsequent replacement, cleaning, and maintenance.

[0028] like Figure 3 As shown, the anti-detachment structure also includes a slot 26 and a sliding channel 27. The slot 26 is opened on the circumferential surface of the spindle 21. A sliding channel 27 is opened on each of the inner walls of the two sides of the slot 26. The pin 22 can be inserted into the slot 26. The thrust block 23 is slidably set in the sliding channel 27. The thrust block 23 is a rectangular prism. One end of the thrust block 23 is round and the other end is beveled. The lower end of the pin 22 is chamfered to form a slope. The sliding channel 27 forms a rectangular groove that is clearance-fitted with the thrust block 23. The two sliding channels 27 are arranged in an inward V-shape. The anti-detachment structure also includes a reinforcing bolt 28. The upper end of the pin 22 is provided with a countersunk hole. The reinforcing bolt 28 passes through the countersunk hole and is threaded to the spindle 21. The pin 22 and the slot 26 are clearance-fitted. The end of the pin 22 is round and the diameter is equal to the diameter of the spindle 21.

[0029] In this design, after the spindle 21 is inserted through the inlet / outlet port 25, the spindle 21 can rotate on the inner circumferential surface of the outer sleeve 20. To improve the limiting effect on the spindle 21, the pin 22 is inserted into the slot 26 and the reinforcing bolt 28 is tightened. The two thrust blocks 23 are pushed by the slope at the bottom of the pin 22. The thrust blocks 23 slide in the corresponding sliding channel 27 and the end of the thrust block 23 enters the thrust groove 24. The end of the thrust block 23 in the thrust groove 24 is arc-shaped. The thickness of the thrust block 23 is equal to the depth of the thrust groove 24. The two thrust blocks 23 can achieve stable limiting of the spindle 21, taking into account both the convenience of disassembly and assembly and the stability of locking the spindle 21.

[0030] When removing the spindle 21, the outer sleeve 20 needs to be rotated so that the inlet / outlet port 25 faces upward. After removing the pin 22, the thrust block 23 slides to the bottom of the sliding channel 27 under the action of gravity. Because the two sliding channels 27 are inwardly oriented, that is, the sliding channels 27 are opened at an angle, after the thrust block 23 slides to the bottom of the sliding channel 27, the arc-shaped end of the thrust block 23 disengages from the thrust groove 24. At this time, the spindle 21 can be removed by lifting it up. When the inlet / outlet port 25 is down, the two sliding channels 27 are outwardly oriented. The component force generated by the gravity of the thrust block 23 will cause the arc-shaped end of the thrust block 23 to be located in the thrust groove 24, thereby preventing the spindle 21 from falling off. Therefore, the spindle 21 can only be removed when the inlet / outlet port 25 is facing upward, to avoid the accidental fall of the spindle 21 and the fall of the spindle 21 caused by improper operation, thereby improving safety and protection.

[0031] like Figure 4 and Figure 5 As shown, an offset printing machine includes a frame 10. One side of the frame 10 is provided with an ink roller body 11 and a conveyor roller. The end of the ink roller body 11 is provided with all the above-mentioned quick-release components for ink rollers. The outer sleeve 20 is rotatably connected to the frame 10, and the ink roller body 11 is fixedly connected to the main shaft 21.

[0032] The working principle of this utility model is as follows: The main shaft 21 is lowered perpendicular to the circumferential surface of the outer sleeve 20, allowing the main shaft 21 to enter the inner circumference of the outer sleeve 20 through the inlet / outlet 25. After the main shaft 21 is inserted through the inlet / outlet 25, it can rotate on the inner circumferential surface of the outer sleeve 20. To improve the limiting effect on the main shaft 21, the pin 22 is inserted into the slot 26, and the reinforcing bolt 28 is tightened. The slope at the bottom of the pin 22 pushes two thrust blocks 23. The thrust blocks 23 slide within the corresponding sliding channel 27, and the ends of the thrust blocks 23 enter the thrust groove 24. The ends of the thrust blocks 23 within the thrust groove 24 are arc-shaped, and the thickness of the thrust blocks 23 is equal to the depth of the thrust groove 24. The two thrust blocks 23 can achieve stable limiting of the main shaft 21. When removing the main shaft 21, the outer sleeve 20 needs to be rotated so that the inlet / outlet port 25 faces upward. After removing the pin 22, the thrust block 23 slides to the bottom of the sliding channel 27 under the action of gravity. Because the two sliding channels 27 are distributed inward, that is, the sliding channels 27 are opened at an angle, after the thrust block 23 slides to the bottom of the sliding channel 27, the arc-shaped end of the thrust block 23 disengages from the thrust groove 24. At this time, the main shaft 21 can be removed by lifting it up. When the inlet / outlet port 25 is down, the two sliding channels 27 are in an outward state. The component force generated by the gravity of the thrust block 23 will make the arc-shaped end of the thrust block 23 located in the thrust groove 24, thereby preventing the main shaft 21 from falling off. This realizes the disassembly and assembly of the main shaft 21 and the ink roller body 11. Both ends of the ink roller body 11 are disassembled and assembled through the same structure.

[0033] Rack 10 includes:

[0034] Printing cylinder assembly: consists of a plate cylinder, a blanket cylinder, and an impression cylinder, with the three cylinders arranged in an isosceles triangle;

[0035] Power transmission system: The main motor synchronously drives the three rollers through a gear set;

[0036] Ink path system: ink fountain → ink transfer roller → ink transfer roller → ink roller body 11 → printing plate cylinder;

[0037] Paper transport system: paper feeder → conveyor roller → impression cylinder → paper delivery table. The specific printing process is common knowledge in the industry and will not be described in detail here.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-release assembly for ink rollers, characterized in that, include: The outer jacket (20) has a notch, and a main shaft (21) is provided in the notch of the outer jacket (20). The main shaft (21) is provided with a locking structure for locking with the outer jacket (20). The locking structure includes a pin (22), a thrust block (23) and a thrust groove (24). The inner wall of the outer jacket (20) is provided with a thrust groove (24). Two thrust blocks (23) are symmetrically arranged on the main shaft (21). The pin (22) is detachably connected to the main shaft (21). The pin (22) can push the two thrust blocks (23) into the thrust groove (24). The thrust blocks (23) can slide in the thrust groove (24).

2. The quick-release assembly for ink rollers according to claim 1, characterized in that: The outer sleeve (20) is annular, and the main shaft (21) is cylindrical, with the diameter of the main shaft (21) being equal to the inner diameter of the outer sleeve (20).

3. The quick-release assembly for ink rollers according to claim 1, characterized in that: The anti-detachment structure also includes an inlet / outlet opening (25), and the outer jacket (20) has an inlet / outlet opening (25) on its circumferential surface for entry and exit. The main shaft (21) can pass through the inlet / outlet opening (25) and enter the interior of the outer jacket (20).

4. The quick-release assembly for ink rollers according to claim 1, characterized in that: The anti-detachment structure also includes a slot (26) and a sliding channel (27). The slot (26) is opened on the circumferential surface of the spindle (21). A sliding channel (27) is opened on each of the inner walls of the two sides of the slot (26). The pin (22) can be inserted into the slot (26). The thrust block (23) is slidably arranged in the sliding channel (27).

5. The quick-release assembly for ink rollers according to claim 4, characterized in that: The thrust block (23) is a rectangular prism. One end of the thrust block (23) is round, and the other end of the thrust block (23) is inclined. The lower end of the pin (22) is chamfered to form a slope. The sliding channel (27) forms a rectangular groove that fits the thrust block (23) with a clearance. The two sliding channels (27) are arranged in an inward V-shape.

6. The quick-release assembly for ink rollers according to claim 1, characterized in that: The anti-detachment structure also includes a reinforcing bolt (28), and the upper end of the pin (22) is provided with a countersunk hole. The reinforcing bolt (28) passes through the countersunk hole and is threadedly connected to the main shaft (21).

7. An offset printing machine, comprising a frame (10), wherein an ink roller body (11) and a conveyor roller are provided on one side of the frame (10), characterized in that: The end of the ink roller body (11) is provided with an ink roller quick disassembly assembly as described in any one of claims 1-6, the outer sleeve (20) is rotatably connected to the frame (10), and the ink roller body (11) is fixedly connected to the main shaft (21).

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