Automatic plate feeding device of direct plate making machine

Abstract

The invention relates to the technical field of plate-making printing, in particular to an automatic plate feeding device of a direct plate-making machine, which comprises a bottom plate, the top of the bottom plate is fixedly connected with a conveying frame, a limiting plate is arranged above the conveying frame, the center of the limiting plate is rotatably connected with a rotating disc, four limiting frames are arranged below the limiting plate, and the rotating disc is rotatably connected with the limiting frame. A rectangular ring is fixedly connected to the center of the interior of the limiting frame, and a sealing plate is fixedly connected to one side of the limiting frame; the gaps between the rectangular rings and the upper ends and the lower ends of the limiting frames are blocked, the adsorption force in the rectangular rings is increased, after a printing plate is limited through the four limiting frames, the four side edges of the printing plate continue to be adsorbed through the negative pressure adsorption effect, and the printing plate is kept in an adsorption tensioning state under the action of the peripheral adsorption force; and the flatness of the printing plate is improved, and the positioning deviation in the plate feeding process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of platemaking and printing, and in particular to an automatic plate loading device of a direct platemaking machine. Background Art

[0002] The direct platesetter transfers graphic information directly to the printing plate through a digital process. Its working principle is: the computer transfers the design file to the platesetter, and the metal or polyester plate coated with a photosensitive coating is exposed through a precision laser system. The laser beam accurately ablates or changes the chemical properties of the coating according to the graphic data. After development, the exposed area forms oleophilic or hydrophilic properties, distinguishing the graphic and non-graphic parts. After processing, the printing plate can be directly printed on the machine, eliminating the traditional film platemaking process and improving accuracy and efficiency. The core process includes digital file processing, laser imaging, plate development and post-processing to achieve high resolution and fast platemaking.

[0003] The patent document with publication number CN112339398A discloses a multifunctional nanomaterial direct platemaking machine loading device, including a transverse base plate, a linear guide rail, a slide seat, a slider, an adjustable positioning frame structure, a left L-shaped mounting frame, a right L-shaped mounting frame, a motor, a driving pulley, a driven pulley, a synchronous belt, a mounting support, a photoelectric sensor, an adjustable protective frame structure, a positioning buffer frame structure and a side positioning frame structure. The linear guide rail bolts are installed on the upper part of the transverse base plate; the slide seat is slidably clamped on the upper part of the linear guide rail; the slider bolts are installed on the upper left part of the slide seat.

[0004] In the prior art, when a printing plate is placed on a direct platemaking machine, a limiting mechanism is usually used to limit and clamp the printing plate. During the placing process, due to the thin thickness of the printing plate, when the side of the printing plate is limited and clamped, the printing plate is prone to slight bending deformation from the center downward under the action of its own gravity, thereby causing positioning deviation after placing the plate and affecting the flatness of the printing plate. In addition, due to static electricity, the surface of the printing plate is prone to absorb dust, which reduces the exposure quality of the printing plate and affects the printing effect of the printing plate. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose an automatic plate loading device for a direct plate making machine.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: an automatic plate loading device of a direct platemaking machine, comprising a bottom plate, the top of the bottom plate is fixedly connected to a conveying frame, a limit plate is arranged above the conveying frame, the center of the limit plate is rotatably connected to a rotating disk, four limit frames are arranged below the limit plate, the center of the limit frame is fixedly connected to a rectangular ring, one side of the limit frame is fixedly connected to a sealing plate, a movable plate is arranged inside the limit frame, one side of the movable plate is fixedly connected to two blocking strips, the two blocking strips are respectively located at the upper and lower ends of one side of the rectangular ring, two limit pins are fixedly connected to the movable plate, the limit pins are both slidably inserted into the corresponding sealing plates, the limit pins are both sleeved with a first spring, the first spring is fixedly connected between the sealing plate and one end of the corresponding limit pin, an air intake pipe is fixedly connected to the movable plate, and one end of the air intake pipe is fixedly connected to a sliding strip after passing through the corresponding sealing plate; Four sliding grooves are provided at the bottom of the limiting plate, and the sliding bars are slidably connected to the corresponding sliding grooves. Circular pins are fixedly connected to the sliding bars, and a yielding groove is provided on the top surface of the sliding groove. A guide ring is fixedly connected to the surface of the rotating disk, and four guide grooves are circumferentially provided on the surface of the guide ring. The top ends of the circular pins extend along the corresponding yielding grooves to the corresponding guide grooves. A driving rotation mechanism is connected to the rotating disk, an adsorption air intake mechanism is connected to the air intake pipe, and a one-way conveying mechanism and a lifting and supporting mechanism are connected to the conveying frame.

[0007] Preferably, the adsorption air intake mechanism includes a first mounting bracket, the first mounting bracket is fixedly connected to the top of the limit plate, the top of the limit plate is fixedly connected to two L-shaped sealing tubes, the L-shaped sealing tubes are fixedly connected to two hoses, one end of the hose is fixedly connected to the corresponding air intake pipe, two air pumps are fixedly installed on the first mounting bracket, the air intake end of the air pump is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to the corresponding L-shaped sealing tube.

[0008] Preferably, the driving rotation mechanism comprises a swing cylinder, which is fixedly mounted on the top of the first mounting frame, and a piston shaft of the swing cylinder passes through the first mounting frame and is fixedly connected to the axis center of the top of the rotating disk.

[0009] Preferably, a positioning plate is provided at the bottom of the limit plate, and a plurality of vacuum suction cups are fixedly installed on the positioning plate, and the adsorption ends of the vacuum suction cups are flush with the bottom of the positioning plate, and two first hydraulic cylinders are fixedly installed on the top of the first mounting frame, and the piston shafts of the first hydraulic cylinders are fixedly connected to a fixing bar after passing through the first mounting frame, and the bottom of the fixing bar is fixedly connected to two circular rods, and the circular rods are fixedly connected to the top of the positioning plate after passing through the limit plate.

[0010] Preferably, two support frames are fixedly connected to the top of the base plate, a slide rail is fixedly connected between the two support frames, an electric slider is slidably connected inside the slide rail, a fixed plate is fixedly connected to the bottom of the electric slider, a second mounting frame is fixedly connected to the top of the limit plate, two second hydraulic cylinders are fixedly installed on the top of the fixed plate, and the piston shafts of the second hydraulic cylinders are fixedly connected to the top of the second mounting frame after passing through the fixed plate.

[0011] Preferably, the one-way conveying mechanism includes a plurality of connecting long shafts and connecting short shafts, a plurality of the connecting long shafts are rotatably connected to the inside of the conveying frame, a plurality of the connecting short shafts are rotatably connected to both sides of the inside of the conveying frame, the connecting long shafts and the connecting short shafts are respectively located at both ends of the conveying frame, a long conveying roller is fixedly connected to the surface of the connecting long shaft, a short conveying roller is fixedly connected to the surface of the connecting short shaft, both ends of the connecting long shaft and one end of the connecting short shaft are fixedly connected to connecting gears, a plurality of matching gears are rotatably connected to both sides of the conveying frame, the matching gears are meshed with two adjacent connecting gears, a motor is fixedly mounted on the conveying frame, and the output shaft of the motor is fixedly connected to the corresponding connecting long shaft.

[0012] Preferably, the lifting and supporting mechanism includes a third hydraulic cylinder, the third hydraulic cylinder is fixedly mounted on the conveying frame, a lifting plate is fixedly connected to the piston shaft of the third hydraulic cylinder, and the lifting plate is located between the plurality of relatively arranged connecting short shafts.

[0013] Preferably, both sides of the interior of the conveying frame are fixedly connected with a bunching frame, and one end of the bunching frame close to the long conveying roller is provided with a guiding inclined surface.

[0014] Preferably, both sides of the top of the conveying frame are fixedly connected to fixed frames, a U-shaped bar is arranged between the two fixed frames, a conductive shaft is fixedly connected inside the U-shaped bar, a conductive roller is rotatably connected to the surface of the conductive shaft, the conductive roller is located on the top of the corresponding conveying long roller, two connecting pins are fixedly connected to the top of the U-shaped bar, the connecting pins are slidably inserted on the corresponding fixed frames, a second spring is sleeved on the connecting pins, the second spring is fixedly connected between the U-shaped bar and the corresponding fixed frame, a conductive rod is fixedly connected to one side of the conveying frame, one end of the conductive rod passes through the bottom plate and extends to the bottom of the bottom plate, and a conductive wire is electrically connected between the conductive rod and the conductive shaft.

[0015] Preferably, a wire blocking frame is fixedly connected to one side of the conveying frame, and a plurality of wire arranging rings are fixedly connected to the wire blocking frame, and the wire arranging rings are all sleeved on the conducting wires.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By blocking the gaps at the upper and lower ends of the rectangular ring and the limit frame, the adsorption force inside the rectangular ring is increased, so that after the printed plate is limited by the four limit frames, the four sides of the printed plate are adsorbed by negative pressure adsorption, so that the printed plate is kept in an adsorption tension state under the action of the adsorption force on all sides, preventing the printed plate from bending downward under its own gravity, improving the flatness of the printed plate and reducing the positioning deviation during the board loading process.

[0017] 2. Through the function of the adsorption air intake mechanism, the limit frame can adsorb dust during the process of limiting the printing plate, thereby reducing the accumulation of dust on the surface of the printing plate and improving the exposure quality and printing effect of the printing plate.

[0018] 3. When the positioning plate contacts the top of the printing plate, the vacuum suction cup starts to work and adsorbs and positions the printing plate. When the limit plate drives the printing plate to move above the upper plate of the direct platemaking machine, the limit frame returns to the initial position and releases the limit on the side of the printing plate. Then, the piston shaft of the first hydraulic cylinder continues to move downward, so that the vacuum suction cup drives the printing plate to move completely to the upper plate of the direct platemaking machine. The vacuum suction cup releases the adsorption and positioning of the printing plate to prevent the displacement caused by the direct drop of the printing plate after the limit is released, thereby ensuring the accuracy of the upper plate position of the printing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a first structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A; Figure 3It is a second structural schematic diagram of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure at B in FIG. Figure 5 For the present invention Figure 3 A schematic diagram of the structure at position C in FIG. Figure 6 It is a schematic diagram of a top view of the matching structure of the limiting plate, the limiting frame and the L-shaped sealing tube of the present invention; Figure 7 It is a bottom-up schematic diagram of the matching structure of the limiting plate, the limiting frame and the L-shaped sealing tube of the present invention; Figure 8 It is a schematic diagram of the coordination structure of the limiting plate, the rotating disk and the limiting frame of the present invention; Fig. 9 It is a schematic diagram of the structure of the limiting plate of the present invention; Fig.10 It is a first cross-sectional schematic diagram of the matching structure of the limiting frame, the sealing plate and the movable plate of the present invention; Fig.11 It is a second cross-sectional schematic diagram of the matching structure of the limiting frame, the sealing plate and the movable plate of the present invention; Fig.12 For the present invention Fig.11 A schematic diagram of the structure at D in FIG. Fig.13 It is a schematic diagram of the coordination structure of the conveying frame, the long conveying roller and the short conveying roller of the present invention.

[0020] In the figure: 1, bottom plate; 2, conveying frame; 3, limit plate; 4, rotating disk; 5, limit frame; 6, rectangular ring; 7, sealing plate; 8, movable plate; 9, blocking strip; 10, limit pin; 11, first spring; 12, air inlet pipe; 13, sliding strip; 14, sliding groove; 15, round pin; 16, give way groove; 17, guide ring; 18, guide groove; 19, first mounting frame; 20, L-shaped sealing pipe; 21, hose; 22, air pump; 23, connecting pipe; 24, swing cylinder; 25, positioning plate; 26, vacuum suction cup; 27, first hydraulic cylinder; 28, fixing strip; 29 , circular rod; 30, supporting frame; 31, sliding rail; 32, electric slider; 33, fixing plate; 34, second mounting frame; 35, second hydraulic cylinder; 36, connecting long axis; 37, connecting short axis; 38, long conveying roller; 39, short conveying roller; 40, connecting gear; 41, matching gear; 42, motor; 43, third hydraulic cylinder; 44, lifting plate; 45, gathering frame; 46, fixing frame; 47, U-shaped bar; 48, conductive shaft; 49, conductive roller; 50, connecting pin; 51, second spring; 52, conductive rod; 53, conductive wire; 54, wire stop frame; 55, wire management ring. DETAILED DESCRIPTION

[0021] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0022] like Figures 1 to 13 The automatic plate loading device of the direct plate making machine shown in the figure comprises a bottom plate 1, a conveying frame 2 is fixedly connected to the top of the bottom plate 1, a limiting plate 3 is arranged above the conveying frame 2, and a rotating disk 4 (such as Figure 6 As shown in FIG. 1 ), four limit frames 5 are arranged below the limit plate 3, and a rectangular ring 6 (as shown in FIG. 1 ) is fixedly connected to the center of the limit frame 5. Fig.10 and Fig.12 As shown in the figure, a sealing plate 7 is fixedly connected to one side of the limit frame 5, a movable plate 8 is arranged inside the limit frame 5, two blocking strips 9 are fixedly connected to one side of the movable plate 8, and the two blocking strips 9 are respectively located at the upper and lower ends of one side of the rectangular ring 6, and two limit pins 10 are fixedly connected to the movable plate 8, and the limit pins 10 are slidably inserted on the corresponding sealing plate 7, and the limit pins 10 are sleeved with a first spring 11, and the first spring 11 is fixedly connected between the sealing plate 7 and one end of the corresponding limit pin 10, and an air intake pipe 12 is fixedly connected to the movable plate 8, and one end of the air intake pipe 12 passes through the corresponding sealing plate 7 and is fixedly connected to a sliding strip 13; The bottom of the limiting plate 3 is provided with four sliding grooves 14 (such as Figure 8 and Fig. 9As shown in the figure, the sliding bars 13 are all slidably connected to the corresponding sliding grooves 14, and the sliding bars 13 are all fixedly connected with round pins 15. The top surface of the sliding grooves 14 is provided with a clearance groove 16. The surface of the rotating disk 4 is fixedly connected with a guide ring 17. The surface of the guide ring 17 is provided with four guide grooves 18 along the circumferential direction. The top ends of the round pins 15 extend along the corresponding clearance grooves 16 to the corresponding guide grooves 18. The rotating disk 4 is connected with a driving rotation mechanism, the air intake pipe 12 is connected with an adsorption air intake mechanism, and the conveying frame 2 is connected with a one-way conveying mechanism and a lifting and lifting mechanism. When working, the prior art usually uses a limiting mechanism to limit and clamp the printing plate when the printing plate of the direct platemaking machine is placed on the plate. During the placing process, due to the printing plate The thickness of the material is relatively thin, so when the side of the printing plate is limited and clamped, the printing plate is prone to slight bending deformation from the center downward under the action of its own gravity, which will cause positioning deviation after the plate is placed and affect the flatness of the printing plate, and the surface of the printing plate is prone to absorb dust due to static electricity, which reduces the exposure quality of the printing plate and affects the printing effect of the printing plate; the technical solution can solve the above problems, and the specific working method is as follows: the printing plate is placed on the conveying frame 2 and moved and conveyed by the one-way conveying mechanism. When the printing plate is conveyed to the bottom of the limiting plate 3, the printing plate is lifted upward by the lifting and lifting mechanism and is located between the four limiting frames 5, and then the rotating mechanism is driven to rotate. The rotating disk 4 is driven to rotate unidirectionally at the rotating connection of the limit plate 3, and the guide ring 17 is driven to rotate synchronously through the rotating disk 4. The guide groove 18 on the guide ring 17 limits and guides the circular pin 15 during the rotation process, so that the circular pin 15 moves along the yield groove 16, and drives the sliding bar 13 to move synchronously inside the corresponding sliding groove 14. The sliding bar 13 drives the air inlet pipe 12 and the movable plate 8 to move, and the limiting effect of the limiting pin 10 makes the four limiting frames 5 approach the center of the rotating disk 4, and move to the corresponding side edges of the printing plate respectively. In the process of movement, the air inlet pipe 12 performs negative pressure adsorption on the inside of the limiting frame 5 through the action of the adsorption air intake mechanism, so that the gas moves along the inside of the rectangular ring 6 and the rectangular ring 8. 6 and the gaps at the upper and lower ends of the limit frames 5 are used for air intake, and the dust on the side of the printed plate is adsorbed through the air intake inside the rectangular ring 6. The gaps at the upper and lower ends of the rectangular ring 6 and the limit frames 5 are respectively located on the upper and lower sides of the printed plate, so as to adsorb the dust on the top and bottom surfaces of the printed plate. When the adjacent limit frames 5 contact each other during the movement, the side of the printed plate contacts the corresponding side of the rectangular ring 6, so that the printed plate is limited between the four limit frames 5, and the limit frames 5 are restricted from continuing to move by the mutual contact of the four limit frames 5, and the guide groove 18 guides the circular pin 15, so that the sliding bar 13 drives the air intake pipe 12 and the movable plate 8 to continue to move, and the movable plate 8 drives the limit pin 10 to move.In addition, the first spring 11 is squeezed during the movement of the limit pin 10, so that the corresponding first spring 11 is compressed and deformed, so that the blocking strip 9 on the movable plate 8 moves toward the corresponding rectangular ring 6, and the gaps at the upper and lower ends of the rectangular ring 6 and the limit frame 5 are moved and blocked, so that the air intake pipe 12 can only be taken in through the inside of the rectangular ring 6, and through the contact between the rectangular ring 6 and the side of the printed plate, the inside of the rectangular ring 6 adsorbs the corresponding side of the printed plate through the negative pressure adsorption effect, and by blocking the gaps at the upper and lower ends of the rectangular ring 6 and the limit frame 5, the rectangular ring 6 is increased. 6, after the printing plate is limited by the four limit frames 5, the four sides of the printing plate are continuously adsorbed by the negative pressure adsorption, so that the printing plate is kept in an adsorption tension state under the action of the surrounding adsorption force, preventing the printing plate from bending downward under the action of its own gravity, improving the flatness of the printing plate and reducing the positioning deviation during the board loading process, and through the action of the adsorption air intake mechanism, the limit frame 5 adsorbs dust during the process of limiting the printing plate, thereby reducing the dust accumulation on the surface of the printing plate and improving the exposure quality and printing effect of the printing plate.

[0023] As a further embodiment of the present invention, the adsorption air intake mechanism includes a first mounting frame 19, the first mounting frame 19 is fixedly connected to the top of the limit plate 3, the top of the limit plate 3 is fixedly connected to two L-shaped sealing tubes 20, the L-shaped sealing tubes 20 are fixedly connected to two hoses 21, one end of the hose 21 is fixedly connected to the corresponding air intake pipe 12, and two air pumps 22 are fixedly installed on the first mounting frame 19, the air intake end of the air pump 22 is fixedly connected to a connecting pipe 23, and one end of the connecting pipe 23 is fixedly connected to the corresponding L-shaped sealing Tube 20; when working, negative pressure is generated inside the connecting tube 23 through the operation of the air pump 22, and through the fixed connection between the connecting tube 23 and the L-shaped sealed tube 20, and the fixed connection between the hose 21 and the L-shaped sealed tube 20 and the air inlet pipe 12, negative pressure is generated inside the limit frame 5 and air is taken in, the gas enters the hose 21 along the air inlet pipe 12, and moves along the hose 21 to the inside of the connecting tube 23 to the air pump 22, and is discharged through the air outlet end of the air pump 22, so that the inside of the limit frame 5 is continuously fed with negative pressure.

[0024] As a further implementation scheme of the present invention, the driving rotation mechanism includes a swing cylinder 24, which is fixedly mounted on the top of the first mounting frame 19. The piston shaft of the swing cylinder 24 passes through the first mounting frame 19 and is fixedly connected to the axis center at the top of the rotating disk 4. When working, the rotating disk 4 is driven to rotate unidirectionally at the rotating connection of the limit plate 3 through the rotation of the piston shaft of the swing cylinder 24, and the guide ring 17 is driven to rotate synchronously through the rotating disk 4, so that the guide groove 18 on the guide ring 17 limits the circular pin 15 during the rotation process, thereby moving the limit frame 5, and the limit frame 5 is moved in the opposite direction through the reverse rotation of the piston shaft of the swing cylinder 24.

[0025] As a further embodiment of the present invention, a positioning plate 25 (such as Figure 7 As shown in the figure, a plurality of vacuum suction cups 26 are fixedly mounted on the positioning plate 25, and the adsorption end of the vacuum suction cup 26 is flush with the bottom of the positioning plate 25. Two first hydraulic cylinders 27 are fixedly mounted on the top of the first mounting frame 19, and the piston shafts of the first hydraulic cylinders 27 all penetrate the first mounting frame 19 and are fixedly connected to a fixing bar 28, and the bottom of the fixing bar 28 is fixedly connected to two round rods 29, and the round rods 29 all penetrate the limiting plate 3 and are fixedly connected to the top of the positioning plate 25; when working, after the printing plate is limited by the four limiting frames 5, the piston shafts of the two first hydraulic cylinders 27 move downward synchronously, thereby driving the corresponding fixing bars 28 to move downward, and the fixing bars 28 drive the round rods 29 to move along the limiting plate 3 The penetration position moves downward synchronously, so that the positioning plate 25 moves closer to the top of the printing plate. When the positioning plate 25 contacts the top of the printing plate, the vacuum suction cup 26 starts to work and adsorbs and positions the printing plate. When the limit plate 3 drives the printing plate to move above the upper plate of the direct platemaking machine, the limit frame 5 returns to the initial position and releases the limit on the side of the printing plate. Then, the piston shaft of the first hydraulic cylinder 27 continues to move downward, so that the vacuum suction cup 26 drives the printing plate to move completely to the upper plate of the direct platemaking machine. The vacuum suction cup 26 releases the adsorption and positioning of the printing plate to prevent the displacement caused by the direct drop of the printing plate after the limit is released, thereby ensuring the accuracy of the upper plate position of the printing plate.

[0026] As a further implementation scheme of the present invention, two support frames 30 are fixedly connected to the top of the base plate 1, a slide rail 31 is fixedly connected between the two support frames 30, an electric slider 32 is slidably connected inside the slide rail 31, a fixed plate 33 is fixedly connected to the bottom of the electric slider 32, a second mounting frame 34 is fixedly connected to the top of the limit plate 3, two second hydraulic cylinders 35 are fixedly installed on the top of the fixed plate 33, and the piston shafts of the second hydraulic cylinders 35 are all fixedly connected to the top of the second mounting frame 34 after passing through the fixed plate 33; when working, the second mounting frame 34 is driven to be vertically lifted and lowered by the movement of the piston shafts of the two second hydraulic cylinders 35, thereby driving the limit plate 3 to move longitudinally, and the limit plate 3 is driven to move horizontally by the electric slider 32 sliding inside the slide rail 31, thereby driving the printed plate to be displaced through the longitudinal and transverse movements of the limit plate 3, thereby moving the printed plate onto the plate.

[0027] As a further embodiment of the present invention, the one-way conveying mechanism includes a plurality of connecting long shafts 36 and connecting short shafts 37, a plurality of connecting long shafts 36 are rotatably connected to the inside of the conveying frame 2, a plurality of connecting short shafts 37 are rotatably connected to both sides of the inside of the conveying frame 2, the connecting long shafts 36 and the connecting short shafts 37 are respectively located at the two ends of the conveying frame 2, the surface of the connecting long shaft 36 is fixedly connected to a long conveying roller 38, the surface of the connecting short shaft 37 is fixedly connected to a short conveying roller 39, both ends of the connecting long shaft 36 and one end of the connecting short shaft 37 are fixedly connected to a connecting gear 40, and both sides of the conveying frame 2 are rotatably connected to a plurality of matching gears The wheel 41 and the matching gear 41 are meshed with the two adjacent connecting gears 40. A motor 42 is fixedly installed on the conveying frame 2, and the output shaft of the motor 42 is fixedly connected to the corresponding connecting long shaft 36. When working, the corresponding connecting long shaft 36 is driven to rotate by the output shaft of the motor 42, so that the connecting gears 40 at both ends of the connecting long shaft 36 are rotated, and the meshing rotation of the matching gear 41 makes the connecting long shaft 36 and the connecting short shaft 37 rotate in the same direction, so that the conveying long roller 38 and the conveying short roller 39 rotate in the same direction, and the printed plate is conveyed unidirectionally.

[0028] As a further implementation scheme of the present invention, the lifting and supporting mechanism includes a third hydraulic cylinder 43, which is fixedly installed on the conveying frame 2, and a supporting plate 44 is fixedly connected to the piston shaft of the third hydraulic cylinder 43, and the supporting plate 44 is located between a plurality of relatively arranged connecting short shafts 37; when working, the printed plate moves from the top of the long conveying roller 38 to the top of the short conveying roller 39 through the same-direction rotation of the long conveying roller 38 and the short conveying roller 39, and when the printed plate is located above the supporting plate 44, the piston shaft of the third hydraulic cylinder 43 moves upward to drive the supporting plate 44 to rise, thereby vertically supporting the printed plate, thereby driving the printed plate to move upward and releasing the one-way conveyance.

[0029] As a further embodiment of the present invention, both sides of the interior of the conveying frame 2 are fixedly connected with a bunching frame 45 (such as Fig.13 As shown in the figure, a guiding slope is provided at one end of the bundling frame 45 close to the long conveying roller 38; during operation, when the printed plate is moved and transported from the top of the long conveying roller 38 to the top of the short conveying roller 39, the printed plate enters between the two bundling frames 45 along the guiding slopes of the two bundling frames 45, thereby performing preliminary position limiting on the printed plate by the two bundling frames 45, ensuring that the printed plate is located between the four limit frames 5 after being lifted up, thereby reducing the influence of the position deviation of the printed plate on the subsequent movement limit.

[0030] As a further embodiment of the present invention, both sides of the top of the conveying frame 2 are fixedly connected with fixed frames 46, a U-shaped bar 47 is arranged between the two fixed frames 46, a conductive shaft 48 is fixedly connected inside the U-shaped bar 47, a conductive roller 49 is rotatably connected to the surface of the conductive shaft 48, and the conductive roller 49 is located at the top of the corresponding conveying long roller 38, and two connecting pins 50 are fixedly connected to the top of the U-shaped bar 47, and the connecting pins 50 are slidably inserted on the corresponding fixed frames 46, and a second spring 51 is sleeved on the connecting pins 50, and the second spring 51 is fixedly connected between the U-shaped bar 47 and the corresponding fixed frame 46, and a conductive rod 52 is fixedly connected to one side of the conveying frame 2, one end of the conductive rod 52 passes through the bottom plate 1 and extends to the bottom of the bottom plate 1, and a conductive wire 53 is electrically connected between the conductive rod 52 and the conductive shaft 48; during operation, when the printed plate is moved and conveyed by the conveying long roller 38, the conductive roller 49 is elastically stretched by the second spring 51 and the conductive wire 53 is electrically connected to the conductive rod 52 and the conductive shaft 48. The corresponding conveying roller 38 is elastically in contact, and when the conveying roller 38 rotates, it rotates along the surface of the conductive shaft 48 through contact friction. When the printed plate moves between the conductive roller 49 and the corresponding conveying roller 38, the conveying roller 38 drives the printed plate to move in one direction, and the conductive roller 49 moves to the top of the printed plate and rotates with the movement of the printed plate. At the same time, the second spring 51 moves upward with the conductive roller 49 to produce compression deformation. The conductive roller 49 contacts and rotates at the top of the printed plate, thereby conducting the static electricity on the printed plate to the conductive shaft 48 through contact conduction, and conducts it to the conductive rod 52 along the conductive line 53. When the bottom plate 1 is located on the ground, one end of the conductive rod 52 penetrates the bottom plate 1 and is grounded, so that the static electricity is grounded and discharged, so that the static electricity is eliminated during the movement and transportation of the printed plate, thereby reducing the re-adsorption of dust during the process of printing plate loading, and further ensuring the printing effect of printing plate loading.

[0031] As a further implementation scheme of the present invention, a wire blocking frame 54 is fixedly connected to one side of the conveying frame 2, and a plurality of wire management rings 55 are fixedly connected to the wire blocking frame 54, and the wire management rings 55 are all sleeved on the conductive wire 53; when working, the conductive wire 53 is constrained by the plurality of wire management rings 55 on the wire blocking frame 54 to prevent the conductive wire 53 from contacting with the mating gear 41 and the connecting gear 40, thereby preventing the conductive wire 53 from affecting the meshing transmission.

[0032] Working principle of the present invention: The printed plate is placed on the conveying frame 2 and is moved and conveyed by the one-way conveying mechanism. When the printed plate is conveyed to the bottom of the limit plate 3, the printed plate is lifted upward by the lifting and lifting mechanism and is located between the four limit frames 5. Then, the rotating disk 4 is driven to rotate unidirectionally at the rotating connection of the limit plate 3 by the driving rotation mechanism, and the guide ring 17 is driven to rotate synchronously by the rotating disk 4. The guide groove 18 on the guide ring 17 limits and guides the circular pin 15 during the rotation process, so that the circular pin 15 moves along the yield groove 16, and drives the sliding bar 13 to move synchronously in the corresponding sliding groove 14. The sliding bar 13 drives the air inlet pipe 12 and the movable plate 8 to move, and through the limit The limiting effect of the pin 10 causes the four limiting frames 5 to approach the center of the rotating disk 4 and move to the corresponding side edges of the printing plate respectively. During the movement, the air inlet pipe 12 performs negative pressure adsorption on the inside of the limiting frame 5 through the adsorption air inlet mechanism, so that the gas is introduced along the inside of the rectangular ring 6 and the gaps at the upper and lower ends of the rectangular ring 6 and the limiting frame 5. The dust on the side of the printing plate is adsorbed through the air intake inside the rectangular ring 6. The gaps at the upper and lower ends of the rectangular ring 6 and the limiting frame 5 are respectively located on the upper and lower sides of the printing plate, thereby adsorbing the dust on the top and bottom surfaces of the printing plate. When adjacent limiting frames 5 contact each other during the movement, the side of the printing plate contacts the corresponding side of the rectangular ring 6, thereby the printing plate is moved. The limit is between the four limit frames 5, and the limit frames 5 are limited to continue to move by contacting each other, and the guide groove 18 guides the circular pin 15, so that the sliding bar 13 drives the air inlet pipe 12 and the movable plate 8 to continue to move, and the movable plate 8 drives the limit pin 10 to move, and squeezes the first spring 11 during the movement of the limit pin 10, so that the corresponding first spring 11 produces compression deformation, so that the blocking strip 9 on the movable plate 8 moves toward the corresponding rectangular ring 6, and moves and blocks the gaps at the upper and lower ends of the rectangular ring 6 and the limit frame 5, so that the air inlet pipe 12 can only be inhaled through the inside of the rectangular ring 6, and through the contact between the rectangular ring 6 and the side of the printed board, the inside of the rectangular ring 6 is The part adsorbs the side corresponding to the printing plate through the negative pressure adsorption effect, and increases the adsorption force inside the rectangular ring 6 by blocking the gaps at the upper and lower ends of the rectangular ring 6 and the limiting frame 5, so that after the printing plate is limited by the four limiting frames 5, the four side edges of the printing plate are continuously adsorbed through the negative pressure adsorption effect, so that the printing plate is kept in an adsorbed and tensioned state under the action of the adsorption force on all sides, and the printing plate is prevented from bending downward under the action of its own gravity, thereby improving the flatness of the printing plate and reducing the positioning deviation during the board loading process, and through the action of the adsorption air intake mechanism, the limiting frame 5 adsorbs dust during the process of limiting the printing plate, thereby reducing the dust accumulation on the surface of the printing plate, and improving the exposure quality and printing effect of the printing plate.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic plate loading device for a direct plate making machine, comprising a bottom plate, characterized in that: A conveying frame is fixedly connected to the top of the bottom plate, a limit plate is arranged above the conveying frame, a rotating disk is rotatably connected at the center of the limit plate, four limit frames are arranged below the limit plate, a rectangular ring is fixedly connected at the center inside the limit frame, a sealing plate is fixedly connected to one side of the limit frame, a movable plate is arranged inside the limit frame, two sealing strips are fixedly connected to one side of the movable plate, the two sealing strips are respectively located at the upper and lower ends of one side of the rectangular ring, two limit pins are fixedly connected to the movable plate, the limit pins are slidably inserted on the corresponding sealing plates, the limit pins are sleeved with a first spring, the first spring is fixedly connected between the sealing plate and one end of the corresponding limit pin, an air intake pipe is fixedly connected to the movable plate, and one end of the air intake pipe is fixedly connected to a sliding strip after passing through the corresponding sealing plate; Four sliding grooves are provided at the bottom of the limit plate, and the sliding bars are slidably connected to the corresponding sliding grooves. Circular pins are fixedly connected to the sliding bars, and a yield groove is provided on the top surface of the sliding groove. A guide ring is fixedly connected to the surface of the rotating disk, and four guide grooves are provided on the surface of the guide ring along the circumferential direction. The top ends of the circular pins extend along the corresponding yield grooves to the corresponding guide grooves. A driving rotation mechanism is connected to the rotating disk, an adsorption air intake mechanism is connected to the air intake pipe, and a one-way conveying mechanism and a lifting and supporting mechanism are connected to the conveying frame.

2. The automatic plate loading device of a direct plate making machine according to claim 1, characterized in that: The adsorption air intake mechanism includes a first mounting frame, which is fixedly connected to the top of the limit plate, and two L-shaped sealing tubes are fixedly connected to the top of the limit plate. Two hoses are fixedly connected to the L-shaped sealing tubes, and one end of the hose is fixedly connected to the corresponding air intake pipe. Two air pumps are fixedly installed on the first mounting frame, and the air intake end of the air pump is fixedly connected to a connecting pipe, and one end of the connecting pipe is fixedly connected to the corresponding L-shaped sealing tube.

3. The automatic plate loading device of a direct plate making machine according to claim 2, characterized in that: The driving rotation mechanism comprises a swing cylinder which is fixedly mounted on the top of the first mounting frame. The piston shaft of the swing cylinder penetrates through the first mounting frame and is fixedly connected to the axis center of the top of the rotating disk.

4. The automatic plate loading device of a direct plate making machine according to claim 2, characterized in that: A positioning plate is provided at the bottom of the limit plate, and a plurality of vacuum suction cups are fixedly installed on the positioning plate. The adsorption end of the vacuum suction cup is flush with the bottom of the positioning plate. Two first hydraulic cylinders are fixedly installed on the top of the first mounting frame. The piston shafts of the first hydraulic cylinders are fixedly connected with fixed strips after passing through the first mounting frame. The bottoms of the fixed strips are fixedly connected with two circular rods, and the circular rods are fixedly connected to the top of the positioning plate after passing through the limit plate.

5. The automatic plate loading device of a direct plate making machine according to claim 4, characterized in that: Two supporting frames are fixedly connected to the top of the base plate, a slide rail is fixedly connected between the two supporting frames, an electric slider is slidably connected inside the slide rail, a fixed plate is fixedly connected to the bottom of the electric slider, a second mounting frame is fixedly connected to the top of the limit plate, two second hydraulic cylinders are fixedly installed on the top of the fixed plate, and the piston shafts of the second hydraulic cylinders are fixedly connected to the top of the second mounting frame after passing through the fixed plate.

6. The automatic plate loading device of a direct plate making machine according to claim 1, characterized in that: The one-way conveying mechanism includes multiple connecting long shafts and connecting short shafts, multiple connecting long shafts are rotatably connected inside the conveying frame, multiple connecting short shafts are rotatably connected on both sides inside the conveying frame, the connecting long shafts and the connecting short shafts are respectively located at both ends of the conveying frame, the surface of the connecting long shafts is fixedly connected with long conveying rollers, the surface of the connecting short shafts is fixedly connected with short conveying rollers, both ends of the connecting long shafts and one end of the connecting short shafts are fixedly connected with connecting gears, both sides of the conveying frame are rotatably connected with multiple matching gears, the matching gears are meshed with two adjacent connecting gears, a motor is fixedly installed on the conveying frame, and the output shaft of the motor is fixedly connected to the corresponding connecting long shaft.

7. The automatic plate loading device of a direct plate making machine according to claim 6, characterized in that: The lifting and supporting mechanism comprises a third hydraulic cylinder, which is fixedly mounted on the conveying frame. A supporting plate is fixedly connected to the piston shaft of the third hydraulic cylinder, and the supporting plate is located between a plurality of relatively arranged connecting short shafts.

8. The automatic plate loading device of a direct plate making machine according to claim 6, characterized in that: Both sides of the conveying frame are fixedly connected with the gathering frame, and one end of the gathering frame close to the conveying long roller is provided with a guiding inclined surface.

9. The automatic plate loading device of a direct plate making machine according to claim 6, characterized in that: Both sides of the top of the conveying frame are fixedly connected to fixed frames, a U-shaped bar is arranged between the two fixed frames, a conductive shaft is fixedly connected inside the U-shaped bar, a conductive roller is rotatably connected to the surface of the conductive shaft, the conductive roller is located on the top of the corresponding conveying long roller, two connecting pins are fixedly connected to the top of the U-shaped bar, the connecting pins are slidably inserted on the corresponding fixed frames, a second spring is sleeved on the connecting pins, the second spring is fixedly connected between the U-shaped bar and the corresponding fixed frame, a conductive rod is fixedly connected to one side of the conveying frame, one end of the conductive rod passes through the bottom plate and extends to the bottom of the bottom plate, and a conductive wire is electrically connected between the conductive rod and the conductive shaft.

10. The automatic plate loading device of a direct plate making machine according to claim 9, characterized in that: A wire retaining frame is fixedly connected to one side of the conveying frame, and a plurality of wire arranging rings are fixedly connected to the wire retaining frame. The wire arranging rings are all sleeved on the conducting wires.

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