CN222387822U

CN222387822U - Doctor blade device special for offset press

Info

Publication number: CN222387822U
Application number: CN202421296500.XU
Authority: CN
Inventors: 黄江; 黄振宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-06-07
Filing date: 2024-06-07
Publication date: 2025-01-24
Anticipated expiration: 2034-06-07

Abstract

The utility model relates to the technical field of offset presses, and discloses a special doctor blade device for an offset press, which comprises a bottom plate, wherein an ink storage box is arranged at the top of the bottom plate, two supporting frames are arranged at the left side of the top of the bottom plate, the front surface and the back surface of the ink storage box are respectively and fixedly connected to one sides of the two supporting frames, a conveying assembly is arranged between the two supporting frames, and a sliding straight groove is formed in the right side of the top of the bottom plate. According to the utility model, the worm is rotated when the scraper is damaged by arranging the replacement knife assembly, so that the worm wheel drives the small screw rod to rotate, the limit cylinder moves upwards, the limitation on the scraper is removed, the damaged scraper is taken down to be replaced by a new scraper, and after the replacement is completed, the worm is reversely rotated, so that the worm drives the small screw rod to rotate through the worm wheel, and the limit cylinder is reinserted into the limit hole on the scraper to fix the position of the scraper, so that the scraper can be conveniently replaced when the scraper is damaged, and the replacement efficiency of the scraper is improved.

Description

Doctor blade device special for offset press

Technical Field

The utility model relates to the technical field of offset presses, in particular to a special doctor blade device for an offset press.

Background

Offset presses are one type of lithographic printing press in which the printed image is first printed from a plate onto a blanket cylinder and then transferred from the blanket cylinder to the paper.

In the chinese patent publication No. CN219486911U, an ink scraping mechanism for an offset press is disclosed, and by arranging a scraper device, the scraper blade is obliquely arranged and abutted against the surface of the offset roller, so that the ink obliquely flows to smear the surface of the offset roller for the second time, and the uniformity of the ink on the surface of the offset roller is increased.

In view of the above-mentioned related art, the inventor considers that there is a disadvantage in that after a long time use, the doctor blade is easily damaged, the doctor blade needs to be removed and replaced with a new one, and the doctor blade and the tool holder on the device are connected by riveting, which makes it inconvenient for the device to remove the rivet first, replace the new doctor blade and fix the new doctor blade with the rivet when the doctor blade is mounted and removed.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a special doctor blade device for an offset press.

The special doctor blade device for the offset press comprises a bottom plate, an ink storage box is arranged at the top of the bottom plate, two supporting frames are arranged on the left side of the top of the bottom plate, the front surface and the back surface of the ink storage box are respectively and fixedly connected to one sides of the two supporting frames, a conveying assembly is arranged between the two supporting frames, a sliding straight groove is formed in the right side of the top of the bottom plate, two orientation rods and a threaded rod are arranged in the sliding straight groove, one end of the threaded rod is fixedly connected with an adjusting motor, a movable plate is connected with the outer side threads of the threaded rod, the movable plate is arranged on the outer side of the orientation rods in a sliding mode, and the doctor blade assembly is arranged on the left side of the movable plate.

The conveying assembly comprises an offset printing roller, the surface of the offset printing roller is abutted to a conveying roller and an ink feeding roller, two ends of a middle shaft of the offset printing roller are fixedly connected with an offset printing motor and a driving gear respectively, two driving gears are connected to the surface of the driving gear in a meshed mode, two driven gears are fixedly connected to one ends of the middle shaft of the conveying roller and the ink feeding roller respectively, a guide roller is arranged above the conveying roller, and two ends of the middle shaft of the guide roller are connected to one sides of the two supporting frames in a rotating mode respectively.

The ink scraping assembly comprises two movable groove plates, the movable groove plates are connected with each other through two spring rods, a supporting block is fixedly connected between the two movable groove plates and penetrates through the inside of the movable plate in a sliding mode, connecting blocks are arranged in the two movable groove plates in a sliding mode, lifting screw rods are connected to the inner threads of the front connecting blocks in a threaded mode, the lifting screw rods are arranged in the front movable groove plates in a penetrating mode, guide rods are arranged in the rear movable groove plates in a penetrating mode, the guide rods are arranged in the rear movable groove plates in a penetrating mode, limiting plates are fixedly connected to the left sides of the connecting blocks in a limiting mode, adjusting screw rods are connected to the outer side threads of the adjusting screw rods in a connecting cylinder in a threaded mode, moving seats are connected to the top of the moving cylinder in a rotating mode, and cutter changing assemblies are arranged at the tops of the moving seats.

The tool changing assembly comprises a fixing plate, a clamping groove and a mounting groove are respectively formed in the right side of the fixing plate, a scraper is mounted in the clamping groove, a worm is mounted in the mounting groove, a worm wheel is connected to the surface of the worm at equal intervals in a transmission mode, a small screw rod is connected to the axis of the worm wheel in a penetrating mode, and a limiting cylinder is connected to the surface of the small screw rod in a threaded mode.

As a further improvement of the scheme, the bottom of the fixed plate is provided with a sliding supporting groove for the movable seat to slide, so that the movable seat can be ensured to normally work to jack up the fixed plate.

As a further improvement of the scheme, the two clamping strips are fixedly connected to the surface of the limiting cylinder, limiting holes for the limiting cylinder and the clamping strips to pass through are formed in the surface of the scraper at equal intervals, and normal movement of the limiting cylinder is guaranteed without deflection.

As a further improvement of the scheme, one end of the worm is fixedly connected with a hand wheel, so that the worm is convenient to rotate.

As a further improvement of the scheme, two linear limiting grooves are formed in the surface of the movable barrel, clamping blocks are slidably arranged in the linear limiting grooves, the clamping blocks are fixedly connected to the top of the limiting plate, and normal movement of the movable barrel is guaranteed without deflection.

As the further improvement of above-mentioned scheme, the front intercommunication of ink storage box has the inlet pipe, and the inlet pipe runs through the connection on the front support frame, conveniently adds the ink material to the ink storage box in.

As a further improvement of the scheme, the mounting seat is mounted at the bottom of the offset motor and fixedly connected to the front face of the front support frame, so that the offset motor can work normally.

Compared with the prior art, the utility model has the beneficial effects that:

According to the utility model, the worm is rotated when the scraper is damaged by arranging the replacement knife assembly, so that the worm wheel drives the small screw rod to rotate, the limit cylinder moves upwards, the limit of the limit cylinder on the scraper is removed, the damaged scraper is taken down to be replaced by a new scraper, after the replacement is completed, the worm is reversely rotated, the worm drives the small screw rod to rotate through the worm wheel, and therefore, the limit cylinder is reinserted into the limit hole on the scraper to fix the position of the scraper, and when the scraper is damaged, the scraper can be conveniently replaced, and the replacement efficiency of the scraper is improved.

According to the utility model, the ink scraping assembly is arranged, when the contact angle of the scraper needs to be adjusted, the adjusting screw rod is rotated, the adjusting screw rod drives the movable cylinder to move, so that the movable seat jacks up one side of the fixed plate, the contact angle of the scraper is changed, the lifting screw rod is rotated, the height position of the fixed plate is adjusted, and finally the adjusting motor is started, so that the threaded rod drives the movable plate to move towards the offset roller until the scraper abuts against the surface of the offset roller, the angle position of the scraper is adjusted, and the inclination angle of the ink scraping is adjusted conveniently as required.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the driving gear, driven gear and offset roller of the present utility model;

FIG. 3 is a schematic view of the structure of the adjusting screw, the moving cylinder and the lifting screw of the present utility model;

Fig. 4 is a schematic structural view of the small screw rod, worm and small screw rod of the present utility model.

Main symbol description:

The ink storage device comprises a bottom plate, 2, an ink storage box, 3, a supporting frame, 4, a threaded rod, 5, a moving plate, 6, an offset roller, 7, an ink feeding roller, 8, a conveying roller, 9, a driving gear, 10, a driven gear, 11, a moving groove plate, 12, a supporting block, 13, a connecting block, 14, a lifting screw rod, 15, a limiting plate, 16, an adjusting screw rod, 17, a moving cylinder, 18, a moving seat, 19, a fixed plate, 20, a scraper, 21, a worm, 22, a worm gear, 23, a small screw rod, 24 and a limiting cylinder.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

Examples

Please combine fig. 1-4, a dedicated doctor blade device of offset press of this embodiment, including bottom plate 1, ink storage box 2 is installed at the top of bottom plate 1, the front intercommunication of ink storage box 2 has the inlet pipe, inlet pipe through-connection is on positive support frame 3, conveniently add the ink material to ink storage box 2 in, two support frames 3 are installed in the left side at bottom plate 1 top, the front and the back of ink storage box 2 are fixed connection respectively in one side of two support frames 3, install conveying assembly between two support frames 3, the slip straight flute has been seted up on the right side at bottom plate 1 top, the internally mounted in slip straight flute has two directional bars and threaded rod 4, the one end fixedly connected with accommodate motor of threaded rod 4, the outside threaded connection of threaded rod 4 has movable plate 5, movable plate 5 slides the outside that sets up at the directional bar, doctor blade assembly is installed in the left side of movable plate 5.

The conveying assembly is used for conveying paper and inking the paper, the conveying assembly comprises an offset roller 6, the offset roller 6 is used for inking the paper, the surface of the offset roller 6 is abutted to a conveying roller 8 and an ink feeding roller 7, the conveying roller 8 is used for driving the paper to convey, the ink feeding roller 7 is used for smearing ink in the ink storage box 2 on the surface of the offset roller 6, two ends of a middle shaft of the offset roller 6 are fixedly connected with an offset motor and a driving gear 9 respectively, an installation seat is installed at the bottom of the offset motor and fixedly connected with the front face of the front face support frame 3, normal operation of the offset motor is guaranteed, two transmission gears 10 are connected with the surface of the driving gear 9 in a meshed mode, two driven gears 10 are fixedly connected to one ends of the middle shaft of the conveying roller 8 and the ink feeding roller 7 respectively, guide rollers are installed above the conveying roller 8, and two ends of the middle shaft of the guide rollers are connected to one sides of the two support frames 3 in a rotating mode respectively.

The scraping component is used for adjusting the inclination of the scraper 20 to be at a height position, the scraping component comprises two movable groove plates 11, the movable groove plates 11 and the movable plates 5 are connected through two spring rods, a supporting block 12 is fixedly connected between the two movable groove plates 11, the supporting block 12 penetrates through and slides to be arranged in the movable plates 5, connecting blocks 13 are slidably arranged in the two movable groove plates 11, lifting screw rods 14 are connected to the inner parts of the front connecting blocks 13 in a threaded manner, the lifting screw rods 14 are arranged in the front movable groove plates 11, guide rods are arranged in the back connecting blocks 13 in a penetrating manner, the guide rods are arranged in the back movable groove plates 11 in a penetrating manner, limiting plates 15 are fixedly connected to the left sides of the connecting blocks 13, two sides of the surfaces of the limiting plates 15 are rotatably connected with adjusting screw rods 16, two linear limiting grooves are formed in the surfaces of the movable drums 17, clamping blocks are slidably arranged in the inner parts of the linear limiting grooves and fixedly connected to the tops of the limiting plates 15, normal movement of the movable drums 17 is guaranteed, deflection does not occur, the tops of the movable drums 17 are rotatably connected to the movable seats 18, and the cutter changing assemblies of the movable seats 18 are arranged at the tops of the movable seats.

The convenient scraper 20 of changing of tool assembly, the tool assembly includes fixed plate 19, the gliding sliding support groove of confession removal seat 18 has been seted up to the bottom of fixed plate 19, guarantee to remove seat 18 and jack-up fixed plate 19, draw-in groove and mounting groove have been seted up respectively on the right side of fixed plate 19, install scraper 20 in the draw-in groove, the internally mounted of mounting groove has worm 21, the one end fixedly connected with hand wheel of worm 21, conveniently rotate worm 21, the equidistant transmission of surface of worm 21 is connected with worm wheel 22, the axle center department through-connection of worm wheel 22 has little lead screw 23, the surface threaded connection of little lead screw 23 has a limiting cylinder 24, the fixed surface of limiting cylinder 24 is connected with two clamps, the equidistant spacing hole that supplies limiting cylinder 24 and clamps to pass that is equipped with in surface of scraper 20, guarantee the normal movement of limiting cylinder 24, do not take place the deflection.

The special doctor blade device for the offset press is implemented by rotating the worm 21 when the doctor blade 20 is damaged, so that the worm wheel 22 drives the small screw rod 23 to rotate, the limiting cylinder 24 moves upwards, the limiting cylinder 24 is separated from the limiting hole on the doctor blade, the damaged doctor blade 20 is taken down to replace the new doctor blade 20, after replacement is completed, the worm 21 is reversely rotated, the worm 21 drives the small screw rod 23 to reversely rotate through the worm wheel 22, so that the limiting cylinder 24 is reinserted into the limiting hole on the doctor blade 20, the position of the doctor blade 20 is fixed, the doctor blade 20 can be conveniently replaced when the doctor blade 20 is damaged, and the replacement efficiency of the doctor blade 20 is improved.

The contact angle of the scraper 20, namely the included angle between the tangent line of the contact point of the scraper 20 and the offset roller 6 and the scraper 20, has an important influence on printing quality, when the contact angle of the scraper 20 is adjusted, one of the adjusting screw rods 16 is rotated, the adjusting screw rod 16 drives the movable cylinder 17 to move, so that the movable seat 18 jacks up one side of the fixed plate 19, the contact angle of the scraper 20 is changed, the lifting screw rod 14 is rotated again, the height position of the fixed plate 19 is adjusted, and finally, the adjusting motor is started again, so that the threaded rod 4 drives the movable plate 5 to move towards the offset roller 6 until the scraper 20 abuts against the surface of the offset roller 6, the adjustment of the contact angle of the scraper 20 is completed, and the contact angle of the scraper 20 is convenient to adjust as required.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. A scraper device for an offset printing machine, characterized in that it comprises a bottom plate (1), an ink storage box (2) is installed on the top of the bottom plate (1), two support frames (3) are installed on the left side of the top of the bottom plate (1), the front and back sides of the ink storage box (2) are respectively fixedly connected to one side of the two support frames (3), a conveying assembly is installed between the two support frames (3), a sliding straight groove is opened on the right side of the top of the bottom plate (1), two directional rods and a threaded rod (4) are installed inside the sliding straight groove, one end of the threaded rod (4) is fixedly connected to an adjustment motor, the outer side of the threaded rod (4) is threadedly connected to a moving plate (5), the moving plate (5) is slidably arranged on the outer side of the directional rod, and the left side of the moving plate (5) is installed with a scraper assembly;

The conveying assembly comprises an offset roller (6), the surface of the offset roller (6) is in contact with a conveying roller (8) and an ink feeding roller (7), the two ends of the intermediate shaft of the offset roller (6) are respectively fixedly connected to an offset motor and a driving gear (9), the surface of the driving gear (9) is meshingly connected to two transmission gears (10), the two driven gears (10) are respectively fixedly connected to one end of the intermediate shaft of the conveying roller (8) and the ink feeding roller (7), a guide roller is installed above the conveying roller (8), and the two ends of the intermediate shaft of the guide roller are respectively rotatably connected to one side of the two support frames (3);

The ink scraping assembly comprises two movable slot plates (11), wherein the movable slot plates (11) and the movable plate (5) are connected via two spring rods, a support block (12) is fixedly connected between the two movable slot plates (11), the support block (12) is slidably arranged inside the movable plate (5), a connecting block (13) is slidably arranged inside the two movable slot plates (11), the interior of the front connecting block (13) is threadedly connected with a lifting screw rod (14), the lifting screw rod (14) is installed inside the front movable slot plate (11), a guide rod is penetrated inside the rear connecting block (13), the guide rod is installed inside the rear movable slot plate (11), the left side of the connecting block (13) is fixedly connected with a limit plate (15), both sides of the surface of the limit plate (15) are rotatably connected with an adjusting screw rod (16), the outer side of the adjusting screw rod (16) is threadedly connected with a movable cylinder (17), the top of the movable cylinder (17) is rotatably connected with a movable seat (18), and the top of the movable seat (18) is installed with a tool changing assembly;

The tool changing assembly comprises a fixing plate (19), a clamping groove and a mounting groove are respectively provided on the right side of the fixing plate (19), a scraper (20) is mounted in the clamping groove, a worm (21) is mounted inside the mounting groove, a worm wheel (22) is connected to the surface of the worm wheel (21) at equal intervals, a small lead screw (23) is connected to the axis of the worm wheel (22), and a limit cylinder (24) is threadedly connected to the surface of the small lead screw (23).

2. A doctor blade device for offset printing press as claimed in claim 1, characterized in that a sliding support groove for sliding of the movable seat (18) is provided at the bottom of the fixed plate (19).

3. A scraper device dedicated to an offset printing machine as described in claim 1, characterized in that two clamping strips are fixedly connected to the surface of the limiting cylinder (24), and limiting holes for the limiting cylinder (24) and the clamping strips to pass through are evenly spaced on the surface of the scraper (20).

4. The ink scraper device for offset printing press according to claim 1, characterized in that one end of the worm (21) is fixedly connected to a hand wheel.

5. A scraper device for offset printing press as claimed in claim 1, characterized in that two linear limiting grooves are provided on the surface of the movable cylinder (17), and a clamping block is slidably arranged inside the linear limiting groove, and the clamping block is fixedly connected to the top of the limiting plate (15).

6. A doctor blade device for offset printing press as claimed in claim 1, characterized in that the front side of the ink storage box (2) is connected to a feed pipe, and the feed pipe is connected to the front support frame (3).

7. A doctor blade device dedicated to an offset printing machine as claimed in claim 1, characterized in that a mounting seat is installed at the bottom of the offset printing motor, and the mounting seat is fixedly connected to the front side of the front support frame (3).