Dust-proofing offset printing apparatus

Abstract

The application relates to the field of printing equipment, in particular to a dustproof offset printing equipment, which comprises an offset printing machine body, further comprises a suction device, the suction device comprises an air extractor and a collection box, an air inlet pipe is arranged between the shell and the air extractor, an air outlet hole is arranged on the shell, one end of the air inlet pipe is in communication with the air outlet hole, and the other end is in communication with an air inlet hole of the air extractor; an air outlet of the air extractor is in communication with the inside of the collection box, and the air extractor is used for generating negative pressure in the shell. The application has the effect of reducing dust flying in the workshop.

Description

Technical Field

[0001] This application relates to the technical field of printing equipment, and in particular to a dustproof offset printing device. Background Technology

[0002] Offset printing machines are a common type of planar printing machine. Their main working principle is to print images and text onto rubber rollers and then transfer them onto paper to complete the printing process.

[0003] Offset printing machines are typically equipped with a powder spraying device, which sprays powder onto the paper through nozzles to keep the paper dry. Because the powder is in powder form, it causes some dust during the spraying process. Therefore, offset printing machines are usually equipped with an outer casing to prevent the dust from spreading.

[0004] However, the outer casing cannot guarantee an absolutely sealed state. During the printing process, dust will still overflow from the inside of the casing, causing dust pollution. Summary of the Invention

[0005] To reduce dust in the workshop, this application provides a dustproof offset printing device.

[0006] The dustproof offset printing equipment provided in this application adopts the following technical solution:

[0007] A dustproof offset printing device includes an offset printing machine body and a suction device. The suction device includes a fan and a collection box. An air inlet pipe is provided between the outer shell and the fan. An exhaust hole is provided on the outer shell. One end of the air inlet pipe is connected to the exhaust hole, and the other end is connected to the air inlet of the fan. The air outlet of the fan is connected to the inside of the collection box. The fan is used to create negative pressure inside the outer shell.

[0008] By adopting the above technical solution, during the printing process, the exhaust fan draws air from inside the casing. Under the action of the exhaust fan, dust enters the collection box with the air, thereby reducing the occurrence of dust overflowing from inside the casing, and realizing the collection and reuse of dust, thus reducing production costs.

[0009] Optionally, the end of the air inlet pipe away from the exhaust fan is provided with a connecting assembly. The connecting assembly includes a mounting base and an abutment plate. The mounting base includes a connecting part and an abutment ring. The connecting part has a cylindrical structure and is inserted into the exhaust hole. The end of the air inlet pipe away from the exhaust fan is fixedly connected to the inside of the connecting part. The abutment ring is sleeved on the outside of the connecting part and located outside the outer shell. A mounting groove is opened on the connecting part corresponding to the position of the abutment plate. The abutment plate is movably connected in the mounting groove. Moving the abutment plate can make the abutment plate sink into the mounting groove. The abutment plate is located inside the outer shell.

[0010] By adopting the above technical solution, the connecting part and the abutment ring are located on both sides of the outer casing sidewall, thereby limiting the connection part and improving the stability after the air inlet pipe is connected to the outer casing. At the same time, by moving the abutment plate and inserting it into the mounting groove, the limiting of the connecting part is removed, realizing a detachable connection between the connecting part and the outer casing, and thus realizing a detachable connection between the air inlet pipe and the outer casing, allowing the suction device to be applied to different offset printing machines.

[0011] Optionally, the exhaust hole is a circular hole, the connecting part is a circular cylindrical structure, the abutting plate is an arc-shaped structure, and multiple abutting plates are arranged along the circumference of the connecting part.

[0012] By adopting the above technical solution, the abutment plate is designed in an arc shape to increase the contact area between the abutment plate and the outer shell, reducing the occurrence of local deformation of the outer shell. The multiple abutment plates improve the stability of the air inlet pipe after connection to the outer shell, and further enhance the contact between the abutment plate and the outer shell, reducing the possibility of outer shell deformation.

[0013] Optionally, the connecting assembly further includes a first guide rod, one end of which is fixed to the abutment plate. A first guide groove is provided on the side wall of the mounting groove. The end of the first guide rod away from the abutment plate is inserted into the first guide groove. The first guide rod can slide within the first guide groove. When the first guide rod slides, it can drive the abutment plate to move closer to or away from the axis of the connecting part.

[0014] By adopting the above technical solution, the sliding first guide rod, under the action of the first guide groove, drives the abutment plate to approach or move away from the axis of the connecting part, thereby enabling the abutment plate to enter or move out of the mounting groove.

[0015] Optionally, the first guide groove includes a first limiting part, a second limiting part, and a transition part. The first limiting part and the second limiting part are both arc-shaped grooves, which are spaced apart around the axis of the connecting part, and the radius of the first limiting part is larger than the radius of the second limiting part. The transition part is located between the first limiting part and the second limiting part, and the two ends of the transition part are respectively connected to the first limiting part and the second limiting part. The first guide rod can slide from the first limiting part to the second limiting part and from the second limiting part to the first limiting part.

[0016] By adopting the above technical solution, the first limiting part and the second limiting part are arc-shaped grooves coaxial with the connecting part. When the abutment plate rotates around the axis of the connecting part, it can drive the first guide rod to slide in the guide groove. When the first guide rod slides from the first limiting part to the second limiting part or from the second limiting part to the first limiting part, since the radii of the first limiting part and the second limiting part are different, it can drive the abutment plate to move in a direction perpendicular to the length direction of the connecting part, thereby driving the abutment plate to enter and exit the mounting groove.

[0017] Optionally, the connecting assembly further includes a second guide rod, which is arranged parallel to and spaced apart from the first guide rod. The mounting groove is provided with a second guide groove, which also includes a first limiting part, a second limiting part, and a transition part. The first limiting part of the first guide groove and the first limiting part of the second guide groove have the same radius, and the radius of the second limiting part of the first guide groove is greater than the radius of the second limiting part of the second guide groove.

[0018] By adopting the above technical solution, when the abutment plate rotates around the axis of the connecting part, the two guide rods simultaneously guide the movement of the abutment plate, improving the stability of the abutment plate during movement. Simultaneously, since the radius of the second limiting part of the second guide groove is smaller than the radius of the second limiting part of the first guide groove, when both the first and second guide rods slide into their respective second limiting parts, one end of the abutment plate tilts towards the axis of the connecting part, thereby reducing interference when adjacent abutment plates move into the mounting groove.

[0019] Optionally, the connecting part is provided with a driving assembly, which includes a driving ring and a driving rod. Multiple driving rods are provided corresponding to the abutment plate. The driving rods are fixedly connected to the first guide rod and / or the second guide rod. The driving rods are rotatably connected to the connecting part around the axis of the connecting part. The driving ring is provided with a sliding groove. One end of the driving rod is inserted into the sliding groove and can rotate relative to the driving ring and slide relative to the driving ring in a direction perpendicular to the length of the connecting part.

[0020] By adopting the above technical solution, rotating the drive ring applies a force to the drive rod, causing the drive rod to rotate around the axis of the connecting part, thereby synchronously driving multiple abutment plates to rotate around the axis of the connecting part. This facilitates the adjustment of the positions of multiple abutment plates by the operator.

[0021] Optionally, the drive assembly also includes a gear ring and a pinion, the gear ring being fixedly connected to the drive ring, and the pinion being rotatably connected to the connecting part and meshing with the gear ring.

[0022] By adopting the above technical solution, rotating the pinion can drive the gear ring to rotate, which in turn drives the drive disc to rotate, thereby achieving adjustment of the drive disc's position.

[0023] Optionally, the connecting part is provided with a locking assembly, the locking assembly includes a limiting rod, the pinion has a sliding hole extending along its own axis, the limiting rod slides through the sliding hole, the connecting part has a limiting groove, and sliding the limiting rod allows one end of the limiting rod to be inserted into the limiting groove.

[0024] By adopting the above technical solution, the rotating limit rod can drive the small gear to rotate, thereby adjusting the position of the abutment plate. After the position of the abutment plate is adjusted, the sliding limit rod can be inserted into the limit groove to limit the rotation of the small gear. This improves the stability of the air inlet pipe after it is connected to the outer shell while the operator rotates the small gear.

[0025] Optionally, the locking assembly further includes a locking block, which is slidably connected to the limiting rod in a direction perpendicular to the length of the limiting rod. The pinion and the connecting part are provided with slots for the locking block to be inserted.

[0026] By adopting the above technical solution, when the locking block on the limiting rod corresponds to the locking groove on the pinion, the locking block inserts into the locking groove to limit the sliding of the limiting rod, thereby improving the stability of the limiting rod driving the pinion to rotate. Moving the locking block disengages it from the locking groove, and then the sliding limiting rod inserts into the limiting groove. The locking block and the locking groove on the insertion connecting part further limit the sliding of the limiting rod, improving the stability of the limiting rod in limiting the pinion. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the structure of the connection component according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the structure of the guide component in an embodiment of this application.

[0030] Figure 4 This is a diagram showing the state of the abutment plate retracting into the mounting slot according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the locking component structure according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the internal structure of the limiting rod according to an embodiment of this application.

[0033] Reference numerals: 1. Offset printing machine body; 11. Exhaust vent; 2. Suction device; 21. Exhaust fan; 22. Collection box; 23. Air inlet pipe; 3. Connecting assembly; 31. Mounting base; 311. Connecting part; 312. Abutment ring; 32. Abutment plate; 33. Mounting groove; 4. Guide assembly; 41. First guide rod; 42. Second guide rod; 43. First guide groove; 44. Second guide groove; 45. First limiting part ; 46. Second limiting part; 47. Transition part; 5. Drive assembly; 51. Drive ring; 52. Connecting plate; 53. Drive rod; 54. Gear ring; 55. Pinion; 56. Handwheel; 57. Slide groove; 6. Locking assembly; 61. Limiting rod; 62. Slide hole; 63. Locking block; 631. Movable groove; 64. Elastic element; 65. Flexible belt; 66. Pull rod; 67. Pressure plate; 68. Limiting groove; 69. Locking groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a dustproof offset printing device.

[0036] Reference Figure 1 and Figure 2 A dust-proof offset printing equipment includes an offset printing machine body 1 and a suction device 2. The suction device 2 is installed on the outer casing of the offset printing machine body 1 and includes an exhaust fan 21 and a collection box 22. An air inlet pipe 23 is provided between the exhaust fan 21 and the outer casing, with one end of the air inlet pipe 23 communicating with the inside of the outer casing and the other end communicating with the air inlet of the exhaust fan 21. An air outlet pipe is provided between the exhaust fan 21 and the collection box 22, with one end of the air outlet pipe communicating with the inside of the collection box 22 and the other end communicating with the air outlet of the exhaust fan 21. Under the action of the exhaust fan 21, a negative pressure is generated inside the outer casing, thereby drawing the air inside the outer casing into the collection box 22, reducing dust overflow and reducing dust generation in the workshop. At the same time, the collected dust can be reused, reducing production costs.

[0037] Reference Figure 1 and Figure 2 The outer casing has an exhaust hole 11 on its side wall that communicates with its interior. The end of the air inlet pipe 23 away from the exhaust fan 21 is inserted into the exhaust hole 11, thus connecting the air inlet pipe 23 to the interior of the outer casing. A connecting component 3 is also provided at the end of the air inlet pipe 23 away from the exhaust fan 21. The connecting component 3 is used to limit the relative movement between the air inlet pipe 23 and the outer casing, thereby improving the stability of the air inlet pipe 23 after it is connected to the outer casing.

[0038] Reference Figure 2 and Figure 3The connecting component 3 includes a mounting base 31 and an abutment plate 32. The mounting base 31 includes a connecting portion 311 and an abutment ring 312. The connecting portion 311 has a cylindrical structure and passes through the exhaust hole 11, with its outer side wall fitting against the side wall of the exhaust hole 11. The air inlet pipe 23 passes through the connecting portion 311, with its outer side wall fitting against and bonded to the inner side wall of the connecting portion 311. The abutment ring 312 has an annular plate structure and is fitted onto the connecting portion 311, integrally formed with it. The abutment plate 32 is located inside the outer casing, with the side wall of the outer casing located between the abutment ring 312 and the abutment plate 32, thereby preventing the connecting portion 311 from detaching from the exhaust hole and limiting the position of the air inlet pipe 23.

[0039] Reference Figure 2 and Figure 3 The abutment plate 32 has an arc-shaped plate structure and is coaxial with the connecting part 311. An annular mounting groove 33 is provided on the side wall of the connecting part 311. The abutment plate 32 is connected within the mounting groove 33 and can move towards or away from the axis of the connecting part 311. Moving the abutment plate 32 allows it to be submerged in the mounting groove 33, thereby achieving a detachable connection between the air inlet pipe 23 and the outer casing, allowing the suction device 2 to be connected to different offset printing machines. To improve the stability of the air inlet pipe 23 after connection with the outer casing, multiple abutment plates 32 can be provided around the axis of the connecting part 311; in this embodiment, six are provided.

[0040] Reference Figure 2 and Figure 3 A guide assembly 4 is provided within the mounting groove 33. The guide assembly 4 includes a first guide rod 41, which is a cylindrical rod-shaped structure. One end of the first guide rod 41 is fixedly welded to the abutment plate 32, and the other end extends away from the abutment plate 32 in a direction parallel to the axis of the connecting part 311. A first guide groove 43 is formed on the side wall of the mounting groove 33 perpendicular to the axis of the connecting part 311. The end of the first guide rod 41 away from the abutment plate 32 is inserted into the first guide groove 43 and can slide along the length direction of the first guide groove 43. Sliding the first guide rod 41 along the length direction of the first guide groove 43 can move the abutment plate 32 closer to or away from the axis of the connecting part 311, thereby allowing the abutment plate 32 to enter and exit the mounting groove 33.

[0041] Reference Figure 2 and Figure 3The first guide groove 43 includes a first limiting part 45, a second limiting part 46, and a transition part 47. Both the first limiting part 45 and the second limiting part 46 are arc-shaped grooves, coaxially arranged with the connecting part 311. The first limiting part 45 and the second limiting part 46 are spaced apart circumferentially on the connecting part 311, and the radius of the first limiting part 45 is larger than the radius of the second limiting part 46. The transition part 47 is located between the first limiting part 45 and the second limiting part 46, with both ends communicating with the first limiting part 45 and the second limiting part 46 respectively, and the length direction of the transition part 47 is tangent to the length directions of the first limiting part 45 and the second limiting part 46. When the abutment plate 32 is located outside the mounting groove 33, the first guide rod 41 is located inside the first limiting part 45. Rotate the abutment plate 32 around the axis of the connecting part 311. Under the action of the transition part 47, the first guide rod 41 slides from the first limiting part 45 to the second limiting part 46, thereby driving the abutment plate 32 into the mounting groove 33.

[0042] Reference Figure 2 and Figure 3 The guide assembly 4 also includes a second guide rod 42, which is parallel to and spaced apart from the first guide rod 41. A second guide groove 44 is provided on the side wall of the mounting groove 33 corresponding to the second guide rod 42. The second guide groove 44 also includes a first limiting part 45, a second limiting part 46, and a transition part 47. At the same time, the radius of the second limiting part 46 of the second guide groove 44 is smaller than the radius of the second limiting part 46 of the first guide groove 43.

[0043] Reference Figure 3 and Figure 4 When the abutment plate 32 rotates around the axis of the connecting part 311, the second guide rod 42 can enter the second limiting part 46 of the second guide groove 44, thereby causing one end of the abutment plate 32 to tilt towards the axis of the connecting part 311, reducing the interference between adjacent abutment plates 32.

[0044] Reference Figure 2 and Figure 3The connecting portion 311 has an internal cavity, within which a drive assembly 5 is installed to drive the abutment plate 32 to rotate around the axis of the connecting portion 311. The drive assembly 5 includes a drive ring 51, a connecting plate 52, and a drive rod 53. The cavity communicates with the first guide groove 43 and the second guide groove 44. The first guide rod 41 and the second guide rod 42 extend into the cavity. The connecting plate 52 is welded to the ends of the first guide rod 41 and the second guide rod 42 away from the abutment plate 32. The drive rod 53 is a cylindrical rod structure; one end of the drive rod 53 is welded to the connecting plate 52, and the other end extends away from the abutment plate 32 in a direction parallel to the axis of the connecting portion 311. The drive ring 51 is located on the side of the connecting plate 52 away from the abutment plate 32, and the drive ring 51 is an annular structure. The drive ring 51 is coaxially arranged with the connecting portion 311 and rotatably connected to the side wall of the cavity around its own axis. A groove 57 is provided on the drive ring 51 at the position corresponding to the drive rod 53. The groove 57 is rectangular and extends radially along the connecting portion 311. The end of the drive rod 53 away from the connecting plate 52 is inserted into the groove 57 and can slide along the length of the groove 57 and rotate about its own axis. Multiple abutment plates 32 are provided corresponding to the connecting plate 52 and the drive rod 53, so that the rotation of the drive ring 51 can drive multiple abutment plates 32 to rotate simultaneously about the axis of the connecting portion 311.

[0045] Reference Figure 2 and Figure 3 The drive assembly 5 also includes a gear ring 54 and a pinion 55. The gear ring 54 is coaxially welded to the drive ring 51, and the pinion 55 is welded to the connecting part 311 and meshes with the gear ring 54. Rotating the pinion 55 can drive the gear ring 54 to rotate, thereby driving the drive ring 51 to rotate.

[0046] To facilitate the rotation of the pinion 55 by the staff, a handwheel 56 is also provided on the pinion 55. Rotating the handwheel 56 can drive the pinion 55 to rotate.

[0047] Reference Figure 3 and Figure 5The connecting part 311 is also equipped with a locking assembly 6, which includes a limiting rod 61. The limiting rod 61 has a square mounting structure, and its center line coincides with the axis of the pinion 55. A sliding hole 62 is provided on the pinion 55 corresponding to the limiting rod 61, and the limiting rod 61 slides through the sliding hole 62 in a direction parallel to the axis of the pinion 55. A limiting groove 68 is provided on the connecting part 311 corresponding to the position of the limiting rod 61, and sliding the limiting rod 61 allows one end of the limiting groove 68 to be inserted into the limiting groove 68. The limiting groove 68 limits the rotation of the limiting rod 61, thereby preventing the pinion 55 from rotating. A handwheel 56 is welded to the end of the limiting rod 61 away from the pinion 55. During the installation of the air inlet pipe 23, the operator rotates the handwheel 56 to drive the pinion 55 to rotate. After the abutment plate 32 is removed from the mounting slot 33, the staff immediately pushes the handwheel 56 to insert the limit rod 61 into the limit slot 68, thereby limiting the pinion 55 and improving the stability of the air inlet pipe 23 after installation.

[0048] Reference Figure 5 and Figure 6 The locking assembly 6 also includes a locking block 63 and an elastic element 64. A movable groove 631 is formed on the side wall of the limiting rod 61. The locking block 63 is installed in the movable groove 631 and can move in a direction perpendicular to the length of the limiting rod 61. The elastic element 64 is installed on the limiting rod 61 to maintain the locking block 63's tendency to move outward from the movable groove 631. In this embodiment, the elastic element 64 is an elastic metal sheet. One side of the elastic metal sheet is bonded to the side wall of the movable groove 631, and the other side extends in a direction parallel to the length of the limiting rod 61. The locking block 63 is bonded to the side of the elastic metal sheet away from the center line of the limiting rod 61.

[0049] Reference Figure 5 and Figure 6 A slot 69 is provided on the side wall of the sliding hole 62 corresponding to the position of the locking block 63. The side of the locking block 63 away from the elastic element 64 is inserted into the slot 69, thereby limiting the sliding of the limiting rod 61 and facilitating the rotation of the pinion 55 by the operator using the limiting rod 61. When it is necessary to slide the limiting rod 61, force is applied to the locking block 63 to make it sink into the movable groove 631, thus allowing the limiting rod 61 to slide. A slot 69 is also provided on the side wall of the limiting groove 68. After the end of the limiting rod 61 is inserted into the limiting groove 68, the locking block 63 can be inserted into the slot 69 on the side wall of the limiting groove 68, thereby improving the stability of the limiting rod 61 in limiting the pinion 55. Multiple locking blocks 63 can be arranged at intervals along the circumference of the limiting rod 61 to improve the stability of the locking blocks 63 in limiting the limiting rod 61. In this embodiment, two locking blocks 63 are provided.

[0050] Reference Figure 5 and Figure 6The locking assembly 6 also includes a flexible band 65 and a pull rod 66. The flexible band 65 is made of a flexible material, and in this embodiment, it is a hemp rope. The flexible band 65 is located between the two locking blocks 63, and both ends of the flexible band 65 are respectively bonded and fixed to the two locking blocks 63. The pull rod 66 is located at the middle position along the length of the flexible band 65 and is slidably connected to the limiting rod 61 in a direction parallel to the sliding direction of the limiting rod 61. The end of the pull rod 66 is bonded to the flexible band 65. Sliding the pull rod 66 can drive the two locking blocks 63 to move closer to each other, thereby allowing the locking blocks 63 to disengage from the locking slots 69, making it convenient for the operator to adjust the position of the locking blocks 63.

[0051] Reference Figure 5 and Figure 6 The locking assembly 6 also includes a pressure plate 67, which is located on the side of the handwheel 56 near the pinion 55. The pressure plate 67 is slidably fitted onto the limiting rod 61 along its length. A connecting rod is provided between the pressure plate 67 and the pull rod 66, with one end of the connecting rod welded to the pressure plate 67 and the other end welded to the pressure plate 67. Sliding the pressure plate 67 towards the handwheel 56 can move the pull rod 66, thereby moving the locking block 63. During the installation and disassembly of the air inlet pipe 23, the operator holds the handwheel 56 above it, and their fingertips can contact the pressure plate 67. By controlling the sliding of the pressure plate 67 with their fingertips, the position of the locking block 63 can be controlled. For example, when the operator rotates the handwheel 56 to rotate the pinion 55, and the position of the contact plate 32 reaches the designated position, the operator can immediately press the pressure plate 67 with their fingertips, thereby disengaging the locking block 63 from the slot 69. At the same time, the operator presses the handwheel 56 with their arm, causing the limiting rod 61 to slide. When the locking block 63 aligns with the locking slot 69 in the limiting groove 68, the locking block 63 can automatically insert into the locking slot 69 under the action of the elastic element 64, thus limiting the sliding of the limiting rod 61.

[0052] The implementation principle of a dustproof offset printing device according to an embodiment of this application is as follows: Before the air inlet pipe 23 is connected to the outer casing, the abutment plate 32 is submerged in the mounting groove 33. In this state, the connecting part 311 can be inserted into the exhaust hole 11. After the connecting part 311 is inserted into the exhaust hole 11, the handwheel 56 is rotated, which drives the pinion 55 to rotate, thereby driving the gear ring 54 to rotate. The rotation of the gear ring 54 drives the drive ring 51 to rotate, thereby driving multiple abutment plates 32 to rotate around the axis of the connecting part 311. During the rotation of the abutment plate 32 around the axis of the connecting part 311, under the action of the first guide groove 43 and the second guide groove 44, the abutment plate 32 moves out of the mounting groove 33. After the abutment plate 32 moves out of the mounting groove 33, it cooperates with the abutment ring 312 to limit the movement of the connecting part 311, preventing the connecting part 311 from disengaging from the exhaust hole 11, thus realizing the connection between the air inlet pipe 23 and the outer casing.

[0053] During the printing process, the exhaust fan 21 operates, discharging the air and dust from inside the casing into the collection box 22, thereby reducing dust in the workshop.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dustproof offset printing device, comprising an offset printing machine body (1), characterized in that: It also includes a suction device (2), which includes a blower (21) and a collection box (22). An air inlet pipe (23) is provided between the outer shell of the offset printing machine body (1) and the blower (21). An exhaust hole (11) is provided on the outer shell of the offset printing machine body (1). One end of the air inlet pipe (23) is connected to the exhaust hole (11), and the other end is connected to the air inlet of the blower (21). The air outlet of the blower (21) is connected to the inside of the collection box (22). The blower (21) is used to generate negative pressure inside the outer shell of the offset printing machine body (1). A connecting component (3) is provided at the end of the air inlet pipe (23) away from the exhaust fan (21). The connecting component (3) includes a mounting base (31) and an abutment plate (32). The mounting base (31) includes a connecting part (311) and an abutment ring (312). The connecting part (311) is a cylindrical structure and is inserted into the exhaust hole (11). The end of the air inlet pipe (23) away from the exhaust fan (21) is fixedly connected to the inside of the connecting part (311). The abutting ring (312) is sleeved on the outside of the connecting part (311) and located outside the outer shell of the offset printing machine body (1); the connecting part (311) has an installation groove (33) corresponding to the position of the abutting plate (32), the abutting plate (32) is movably connected in the installation groove (33), and moving the abutting plate (32) can make the abutting plate (32) sink into the installation groove (33); the abutting plate (32) is located inside the outer shell of the offset printing machine body (1); The exhaust hole (11) is a circular hole, the connecting part (311) is a circular cylindrical structure, the abutment plate (32) is an arc-shaped structure, and multiple abutment plates (32) are provided along the circumference of the connecting part (311); The connecting assembly (3) further includes a first guide rod (41), one end of which is fixed to the abutment plate (32). A first guide groove (43) is provided on the side wall of the mounting groove (33). The end of the first guide rod (41) away from the abutment plate (32) is inserted into the first guide groove (43). The first guide rod (41) can slide in the first guide groove (43). When the first guide rod (41) slides, it can drive the abutment plate (32) to move closer to or away from the axis of the connecting part (311). The first guide groove (43) includes a first limiting part (45), a second limiting part (46), and a transition part (47). The first limiting part (45) and the second limiting part (46) are both arc-shaped grooves, which are spaced apart around the axis of the connecting part (311), and the radius of the first limiting part (45) is greater than the radius of the second limiting part (46). The transition part (47) is located between the first limiting part (45) and the second limiting part (46), and the two ends of the transition part (47) are respectively connected to the first limiting part (45) and the second limiting part (46). The first guide rod (41) can slide from the first limiting part (45) to the second limiting part (46) and from the second limiting part (46) to the first limiting part (45).

2. The dustproof offset printing equipment according to claim 1, characterized in that: The connecting component (3) further includes a second guide rod (42), which is parallel to and spaced apart from the first guide rod (41). The mounting groove (33) is provided with a second guide groove (44), which also includes a first limiting part (45), a second limiting part (46), and a transition part (47). The first limiting part (45) of the first guide groove (43) and the first limiting part (45) of the second guide groove (44) have the same radius. The radius of the second limiting part (46) of the first guide groove (43) is greater than the radius of the second limiting part (46) of the second guide groove (44).

3. A dustproof offset printing equipment according to claim 1 or 2, characterized in that: A drive assembly (5) is provided on the connecting part (311). The drive assembly (5) includes a drive ring (51) and a drive rod (53). Multiple drive rods (53) are provided corresponding to the abutment plate (32). The drive rods (53) are fixedly connected to the first guide rod (41) and / or the second guide rod (42). The drive ring (51) is rotatably connected to the connecting part (311) around the axis of the connecting part (311). A sliding groove (57) is provided on the drive ring (51). One end of the drive rod (53) is inserted into the sliding groove (57) and can rotate relative to the drive ring (51) and slide relative to the drive ring (51) in a direction perpendicular to the length direction of the connecting part (311).

4. The dustproof offset printing equipment according to claim 3, characterized in that: The drive assembly (5) also includes a gear ring (54) and a pinion (55). The gear ring (54) is fixedly connected to the drive ring (51), and the pinion (55) is rotatably connected to the connecting part (311) and meshes with the gear ring (54).

5. The dustproof offset printing equipment according to claim 4, characterized in that: The connecting part (311) is provided with a locking assembly (6), the locking assembly (6) includes a limiting rod (61), the pinion (55) is provided with a sliding hole (62) that runs through it along its own axis, the limiting rod (61) slides through the sliding hole (62), the connecting part (311) is provided with a limiting groove (68), and sliding the limiting rod (61) can allow one end of the limiting rod (61) to be inserted into the limiting groove (68).

6. The dustproof offset printing equipment according to claim 5, characterized in that: The locking assembly (6) also includes a locking block (63), which is slidably connected to the limiting rod (61) in a direction perpendicular to the length direction of the limiting rod (61). The pinion (55) and the connecting part (311) are provided with a slot (69) for the locking block (63) to be inserted.

Images