Roland offset press and paper feeding device

Abstract

The utility model relates to the technical field of offset presses, in particular to a Roland offset press and paper feeding device which comprises an offset press, a conveying device, a first lifting mechanism, a second lifting mechanism, a bottom plate, a supporting plate, a supporting plate, a storage box and the like. A first lifting mechanism and a second lifting mechanism are detachably connected to the four corners of the conveying device, a bottom plate is arranged at the bottom of the conveying device, threaded holes are formed in the four corners of the bottom plate, the bottom plate is in threaded connection with the second lifting mechanism, a supporting plate is connected to the upper portion of the bottom plate, a supporting plate is arranged on the left portion of the conveying device, and the upper portion of the supporting plate is fixedly connected with the first lifting mechanism. According to the automatic paper replacing device, the telescopic air cylinder, the U-shaped groove bearing, the connecting block and other components are arranged, so that the inserting rod can retract according to the fixing step when retracting, paper piles are kept relatively stable in the paper replacing process, and inclination or dislocation of the paper piles is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of offset printing machines, in particular to a Roland offset printing machine and a paper feeding device. Background Art

[0002] Offset printing press is a common flat printing equipment, also known as flatbed printing press, which is widely used in the printing industry to produce various flat printed products, including books, magazines, newspapers, leaflets and packaging boxes. With the development of technology, modern offset printing presses have become high-speed printing presses, with a printing speed of 10,000 to 15,000 sheets per hour. However, due to the height limitation of the printing press, the height of each pile of paper cannot exceed 150 cm. Therefore, each pile of paper installed can only be printed for a maximum of 30 to 50 minutes before it needs to be stopped to change the paper.

[0003] When large quantities of products need to be printed, this intermittent working method not only wastes time and materials, but also may cause color difference in printed products, production interruption, and even batch production scrapping due to stopping for paper changing. At present, the method of changing paper with a rod is adopted to achieve paper loading without stopping the machine, that is, after the upper paper pile rises to the appropriate position, the rod is manually inserted to lift the upper paper pile, and then the pallet is removed. After the lower paper pile rises and docks with the upper paper pile, the rod is withdrawn to complete the docking of the upper and lower paper piles. However, in the actual operation process, it is relatively cumbersome to manually insert several rods into the sockets of the special pallet, and when the rods are pulled out, in order to keep the paper pile stable during the paper changing process, a fixed pulling out procedure is generally followed, that is, the rod in the middle is not completely pulled out first, leaving a part inserted between the upper and lower paper piles, and then the rods on both sides are completely pulled out, and finally the rod in the middle is completely pulled out. This operation depends on the experience and skills of the operator and is prone to operating errors. In view of this, the utility model proposes a Roland offset printing machine and a paper loading device to realize a fully automated paper loading process and improve production efficiency. Utility Model Content

[0004] In order to overcome the disadvantages of heavy and cumbersome manual paper changing operations, the utility model aims to provide a Roland offset printing machine and a paper loading device.

[0005] A paper loading device, wherein the four corners of the conveying device are detachably connected to a first lifting mechanism, a support plate is provided on the left part of the conveying device, the upper part of the support plate is fixedly connected to the first lifting mechanism, a storage box is detachably connected to the right part of the conveying device, the upper part of the storage box is fixedly connected to the first lifting mechanism, the storage box is slidably connected to a guide rod, a side of the storage box close to an offset printing machine is slidably connected to four insertion rods, grooves are provided on the insertion rods, the storage box is hollow, two first coupling gears and two second coupling gears are rotatably connected in the storage box, the first coupling gear and the second coupling gear are rotatably connected The shaft gear and the groove on the insertion rod are meshed with each other, a rotating motor is fixedly installed on the inner wall of the storage box, the output shaft of the rotating motor is connected to one end of the rotating shaft, the other end of the rotating shaft is rotatably connected to the storage box, a third coupling gear is movably connected to the rotating shaft, two U-groove bearings are rotatably connected to the third coupling gear, a connecting block is fixedly connected to the U-groove bearing, a sliding groove is provided on the side surface of the storage box, a slider is slidably connected in the sliding groove, the slider is fixedly connected to the connecting block, a telescopic cylinder is fixedly installed on the side surface of the storage box, and the telescopic rod of the telescopic cylinder is fixedly connected to the slider.

[0006] Furthermore, a sensor is fixedly connected to the middle of one side of the storage box close to the offset printing machine, and the sensor and the reflector cooperate with each other to determine the height position of the storage box.

[0007] Furthermore, a dust cover is fixedly connected to the upper portion of the storage box.

[0008] Furthermore, eight stoppers are fixedly connected in the storage box, with two blocks in each group, which are respectively installed on both sides of the insertion rod.

[0009] A Roland offset printing machine comprises an offset printing machine, a second lifting mechanism, a bottom plate, a support plate, a reflector, a guide rod and the above-mentioned paper loading device, wherein the right part of the offset printing machine is detachably connected to a conveying device, the four corners of the conveying device are detachably connected to the second lifting mechanism, a bottom plate is provided at the bottom of the conveying device, threaded holes are provided at the four corners of the bottom plate and are threadedly connected to the second lifting mechanism, the upper part of the bottom plate is connected to a support plate, the middle part of the right side surface of the support plate is fixedly connected to a reflector, the right part of the conveying device is fixedly connected to at least two guide rods, and a storage box is slidably connected to the guide rods.

[0010] Furthermore, the support plate is made of nylon, and at least four slots are provided on the upper portion of the support plate.

[0011] The beneficial effects of the utility model are as follows: the utility model is provided with components such as a first coupling gear, a second coupling gear and a third coupling gear. When in use, the motor drives the third coupling gear to rotate, and then the third coupling gear drives the first coupling gear and the second coupling gear to rotate through meshing transmission, thereby driving the extension and retraction of the insertion rod. At the same time, components such as a telescopic cylinder, a U-groove bearing and a connecting block are provided, so that the insertion rod can retract in fixed steps when retracting, so that the paper pile can remain relatively stable during the paper changing process, avoiding tilting or misalignment of the paper pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the supporting plate, conveying device, guide rod and other components of the utility model.

[0014] Figure 3 It is a schematic structural diagram of the reflector, storage box, support plate and other components of the utility model.

[0015] Figure 4 It is a cross-sectional view of the components such as the insertion rod, the sensor and the dust cover of the utility model.

[0016] Figure 5 It is a cross-sectional view of the first coupling gear, the storage box, the rotating shaft and other components of the utility model.

[0017] Figure 6 The utility model is a schematic diagram of the structure of the slider, the connecting block and the U-groove bearing.

[0018] Markings in the accompanying drawings: 1: offset printing machine, 2: conveying device, 3: storage box, 4: first lifting mechanism, 5: second lifting mechanism, 6: bottom plate, 7: support plate, 8: lower paper pile, 9: upper paper pile, 10: insertion rod, 11: first coupling gear, 12: second coupling gear, 13: third coupling gear, 14: rotating shaft, 15: rotating motor, 16: slider, 17: sensor, 18: reflector, 19: dust cover, 20: guide rod, 21: telescopic cylinder, 22: U-slot bearing, 23: connecting block, 24: support plate, 25: stopper. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0020] A Roland offset printing machine and a paper loading device, such as Figure 1-Figure 6As shown, it includes an offset printing machine 1, a conveying device 2, a storage box 3, a first lifting mechanism 4, a second lifting mechanism 5, a bottom plate 6, a support plate 7, an insertion rod 10, a first coupling gear 11, a second coupling gear 12, a third coupling gear 13, a rotating shaft 14, a rotating motor 15, a slider 16, a sensor 17, a reflector 18, a dust cover 19, a guide rod 20, a telescopic cylinder 21, a U-groove bearing 22, a connecting block 23, a supporting plate 24 and a stopper 25. The right part of the offset printing machine 1 is detachably connected to the conveying device 2, and the four corners of the conveying device 2 are detachably connected to the first lifting mechanism 4 and the second lifting mechanism 5. The first lifting mechanism 4 is a lifting mechanism using a hydraulic cylinder and a chain, which is no different from the prior art, so it is not elaborated in detail. The lifting mechanism 5 is a lifting mechanism using a motor and a screw rod, which is no different from the prior art, so it will not be elaborated in detail. A bottom plate 6 is provided at the bottom of the conveying device 2, and threaded holes are provided at the four corners of the bottom plate 6, and the bottom plate 6 is threadedly connected to the second lifting mechanism 5. A support plate 7 is connected to the upper part of the bottom plate 6, and a slot for inserting the insertion rod 10 is provided on the upper part of the support plate 7. A sensor 17 is fixedly connected to the middle part of the side of the storage box 3 close to the offset printing machine 1, and a reflector 18 is fixedly connected to the middle part of the side of the support plate 7 close to the storage box 3. The sensor 17 and the reflector 18 cooperate with each other to accurately determine the upper and lower positions of the storage box 3, so that the insertion rod 10 can be accurately inserted into the slot of the support plate 7. A support plate 24 is provided on the left part of the conveying device 2, and the upper part of the support plate 24 is fixedly connected to the first lifting mechanism 4. The right part of the device 2 is detachably connected with a storage box 3, and the upper part of the storage box 3 is fixedly connected to the first lifting mechanism 4. The right part of the conveying device 2 is fixedly connected with two guide rods 20, and the storage box 3 is slidably connected to the guide rods 20. The guide rods 20 provide support for the storage box 3 to slide up and down. The storage box 3 is slidably connected to the side of the offset printing machine 1 with four insertion rods 10. The four insertion rods 10 are evenly distributed so that the paper pile is evenly stressed. At the same time, eight stoppers 25 are fixedly connected in the storage box 3, each two in a group, and are respectively installed on the front and rear sides of the insertion rods 10. The stoppers 25 can prevent the insertion rods 10 from deviating when sliding. The insertion rods 10 are provided with grooves. The storage box 3 is hollow, and the first coupling gear 11 and the second coupling gear 1 are rotatably connected in the storage box 3. 2, wherein the first coupling gear 11 is meshed with the grooves on the two plug rods 10 at the front and rear parts, the second coupling gear 12 is meshed with the grooves on the two plug rods 10 at the middle part, a rotating motor 15 is fixedly installed on the inner wall of the storage box 3, the output shaft of the rotating motor 15 is connected to one end of the rotating shaft 14, the other end of the rotating shaft 14 is rotatably connected to the storage box 3, a third coupling gear 13 is provided in the middle of the rotating shaft 14, a key is provided in the middle of the rotating shaft 14, a keyway is provided in the middle of the third coupling gear 13, and the length of the keyway is greater than the length of the key, so that the third coupling gear 13 can not only rotate on the rotating shaft 14, but also slide on the rotating shaft 14, and the third coupling gear 13 can mesh with the first coupling gear 11 and the second coupling gear 12,Two U-groove bearings 22 are rotatably connected to the third coupling gear 13, and a connecting block 23 is fixedly connected to the U-groove bearing 22. A slide groove is provided on the upper side of the storage box 3, and a slider 16 is slidably connected in the slide groove. The slider 16 is fixedly connected to the connecting block 23. A telescopic cylinder 21 is fixedly installed on the upper side of the storage box 3, and the telescopic rod of the telescopic cylinder 21 is fixedly connected to the slider 16. A dust cover 19 is fixedly connected to the upper part of the storage box 3, and the dust cover 19 can block dust and prevent dust from entering the storage box 3.

[0021] Working principle: when paper needs to be loaded, the first lifting mechanism 4 is started, and the first lifting mechanism 4 drives the support plate 24 and the storage box 3 to move up and down together. At the same time, the sensor 17 emits a laser signal, and the reflector 18 returns the laser signal to the original path. When the sensor 17 receives the signal, the first lifting mechanism 4 is paused. At this time, the insertion rod 10 is aligned with the slot on the support plate 7 up and down, and then the rotating motor 15 is started, and the rotating motor 15 drives the rotating shaft 14 to rotate, and then the rotating shaft 14 drives the third coupling gear 13 to rotate, and then the third coupling gear 13 drives the second coupling gear 12 to rotate, and then the second coupling gear 12 drives the two middle insertion rods 10 to extend through meshing transmission, and the two middle insertion rods 10 are inserted into the middle slot on the support plate 7, and the middle After the two insertion rods 10 are fully extended, the rotating motor 15 is paused, and then the telescopic cylinder 21 is started. The telescopic rod of the telescopic cylinder 21 is extended, thereby driving the slider 16 to slide in the slide groove on the upper side of the storage box 3, and then the slider 16 drives the third coupling gear 13 to slide on the rotating shaft 14, and then the third coupling gear 13 and the first coupling gear 11 are meshed with each other, and then the rotating motor 15 is started, and the rotating motor 15 drives the rotating shaft 14 to rotate, and then the rotating shaft 14 drives the third coupling gear 13 to rotate, and then the third coupling gear 13 drives the first coupling gear 11 to rotate together, and then the first coupling gear 11 drives the two insertion rods 10 at the front and rear parts to extend through meshing transmission, and the two insertion rods 10 at the front and rear parts are inserted into the front and rear slots on the support plate 7. When the two front and rear insertion rods 10 are fully extended, the rotating motor 15 is suspended, and the support plate 24 can support the left end of the insertion rod 10, so that the insertion rod 10 is more stable, and then the insertion rod 10 can support the upper paper pile 9, and then the second lifting mechanism 5 is started to make the bottom plate 6 slowly move downward, and then the support plate 7 is separated from the upper paper pile 9, and then the old support plate 7 is taken out, and the new support plate 7 and the lower paper pile 8 are placed, and the second lifting mechanism 5 is started to make the bottom plate 6 move upward. When the upper paper pile 9 is docked with the lower paper pile 8, the second lifting mechanism 5 is suspended, and then the telescopic cylinder 21 is started, and the telescopic rod of the telescopic cylinder 21 is retracted, and then the third coupling gear 13 is meshed with the second coupling gear 12, and then the rotating motor 15 is started, and then the third coupling gear 13 drives the second coupling gear 12 to rotate together, and then the two middle plug rods 10 retract. When they are retracted to half, the rotating motor 15 is stopped. At this time, a part of the two middle plug rods 10 still remains inserted between the upper paper pile 9 and the lower paper pile 8. Then the telescopic cylinder 21 is started, and the telescopic rod of the telescopic cylinder 21 extends, and then the third coupling gear 13 and the first coupling gear 11 are meshed with each other. Then the rotating motor 15 is started, and then the third coupling gear 13 drives to rotate together, and then the two front and rear plug rods 10 retract. After the two front and rear plug rods 10 are completely retracted, the telescopic cylinder 21 is started again, and the telescopic rod of the telescopic cylinder 21 retracts, and then the third coupling gear 13 and the second coupling gear 12 are meshed with each other. Then the rotating motor 15 is started,Then the third coupling gear 13 drives the second coupling gear 12 to rotate together, and then the two middle rods 10 are completely retracted, so that the upper paper pile 9 and the lower paper pile 8 are docked, realizing the automated management of the paper pile replacement process, reducing manual intervention, ensuring the stability of the paper pile during the paper replacement process, and avoiding the paper pile from tilting or misaligning.

[0022] It should be understood that the above description is only for exemplary purposes and is not intended to limit the present invention. Those skilled in the art will understand that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A paper feeding device, characterized in that: The four corners of the conveying device (2) are detachably connected to the first lifting mechanism (4); the left part of the conveying device (2) is provided with a support plate (24); the upper part of the support plate (24) is fixedly connected to the first lifting mechanism (4); the right part of the conveying device (2) is detachably connected to a storage box (3); the upper part of the storage box (3) is fixedly connected to the first lifting mechanism (4); the side of the storage box (3) close to the offset printing machine (1) is slidably connected to four insertion rods (10); grooves are provided on the insertion rods (10); the storage box (3) is hollow; two first coupling gears (11) and two second coupling gears (12) are rotatably connected inside the storage box (3); the first coupling gears (11) and the second coupling gears (12) are mutually connected with the grooves on the insertion rods (10); The storage box (3) is meshed, a rotating motor (15) is fixedly installed on the inner side wall of the storage box (3), the output shaft of the rotating motor (15) is connected to one end of the rotating shaft (14), the other end of the rotating shaft (14) is rotatably connected to the storage box (3), a third coupling gear (13) is movably connected to the rotating shaft (14), two U-groove bearings (22) are rotatably connected to the third coupling gear (13), a connecting block (23) is fixedly connected to the U-groove bearing (22), a sliding groove is provided on the upper side of the storage box (3), a sliding block (16) is slidably connected in the sliding groove, the sliding block (16) is fixedly connected to the connecting block (23), a telescopic cylinder (21) is fixedly installed on the upper side of the storage box (3), and a telescopic rod of the telescopic cylinder (21) is fixedly connected to the sliding block (16).

2. A paper feeding device according to claim 1, characterized in that: A sensor (17) is fixedly connected to the middle of one side of the storage box (3) close to the offset printing machine (1), and the sensor (17) and the reflector (18) cooperate with each other to determine the height position of the storage box (3).

3. A paper feeding device according to claim 2, characterized in that: A dust cover (19) is fixedly connected to the upper portion of the storage box (3).

4. A paper feeding device according to claim 3, characterized in that: Eight stoppers (25) are fixedly connected inside the storage box (3), with two blocks in each group and respectively installed on both sides of the insertion rod (10).

5. A Roland offset printing machine, characterized in that: The invention comprises an offset printing machine (1), a second lifting mechanism (5), a bottom plate (6), a support plate (7), a reflector (18), a guide rod (20) and a paper loading device as described in any one of claims 1 to 4, wherein the right part of the offset printing machine (1) is detachably connected to a conveying device (2), and the four corners of the conveying device (2) are detachably connected to the second lifting mechanism (5), a bottom plate (6) is provided at the bottom of the conveying device (2), the four corners of the bottom plate (6) are provided with threaded holes and are threadedly connected to the second lifting mechanism (5), the upper part of the bottom plate (6) is connected to a support plate (7), the middle part of the right side of the support plate (7) is fixedly connected to a reflector (18), the right part of the conveying device (2) is fixedly connected to at least two guide rods (20), and the storage box (3) is slidably connected to the guide rods (20).

6. A Roland offset printing press according to claim 5, characterized in that: The support plate (7) is made of nylon, and at least four slots are provided on the upper part of the support plate (7).

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