CN219341160U - Rear tension system of printing color group of rotary press - Google Patents
Rear tension system of printing color group of rotary press Download PDFInfo
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- CN219341160U CN219341160U CN202223316109.5U CN202223316109U CN219341160U CN 219341160 U CN219341160 U CN 219341160U CN 202223316109 U CN202223316109 U CN 202223316109U CN 219341160 U CN219341160 U CN 219341160U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a rear tension system of a printing color set of a rotary printing machine, which comprises a tension detection roller, a bottom roller, a paper pressing roller and a paper pressing wheel, wherein the tension detection roller and the bottom roller are arranged between two wallboards, the paper pressing roller is matched with one side of the bottom roller, and the paper pressing wheel is matched with the other side of the bottom roller. The paper pressing wheel comprises five paper pressing wheel monomers which are arranged on a fixed shaft bridged between two wallboards; two paper pressing wheel monomers arranged at two ends of the fixed shaft are opposite to the edges of two sides of the paper tape in a one-to-one correspondence manner, and three paper pressing wheel monomers arranged in the middle of the fixed shaft are opposite to the blank of the printing plate surface of the paper tape in a one-to-one correspondence manner; each paper pressing wheel unit comprises a rocker arm, a cylinder support, a paper pressing wheel cylinder and a paper pressing wheel body. The utility model not only increases the application range of the back tension system, but also solves the problem that paper tape is easy to smear during the printing of books and periodicals.
Description
Technical Field
The utility model relates to a rear tension system of a printing color group of a rotary printing press.
Background
The web-fed rotary printing press must have a certain tension during the printing process, since the movement of the web must only be extended in order to stabilize the printing process, the tension of the web must be kept constant and of a suitable magnitude. Too little tension of the paper tape can lead the paper tape to slide forwards, so that the problems of transverse wrinkles, inaccurate overprinting and the like are generated. Too much tension can cause the paper strap to stretch and deform, resulting in a rough finish and even breakage of the paper strap. The paper tape with unstable tension can generate jumping, so that the problems of longitudinal wrinkles, double images and inaccurate overprinting are generated.
In order for a web-fed rotary printing press to have a constant tension, the tension of the web must be automatically and randomly adjusted in response to the web waving. Accordingly, equipment manufacturers typically place a front tension system between the rear of the paper frame and the paper feed side of the print couple and a rear tension system between the paper output side of the print couple and the paper feed side of the folding unit.
The back tension system consists of a servo motor, a bottom roller, a tension detection roller, a paper pressing roller and the like, the paper tape is wrapped on the bottom roller through the paper pressing roller in a pasting mode, the tension detection roller detects the tension fluctuation of the paper tape and feeds back the tension fluctuation to the servo motor, and the servo motor drives the bottom roller to adjust according to the tension fluctuation condition of the paper tape. Thereby continuously providing stable tension to the paper strap. The paper pressing roller is one rubber roller installed onto the connecting rod, one end of the connecting rod is hinged to the fulcrum pin, the other end of the connecting rod is connected to the paper pressing roller cylinder, and the paper pressing roller cylinder controls the separation and pressing of the paper pressing roller and the bottom roller.
Since the platen roller is an all-rubber roller pressed against the bottom roller. In commercial rotary printing, the web printing is followed by a drying system to enter the post-tensioning system. The printing ink on the paper tape is solidified after being dried, and the paper tape is wrapped on the bottom roller by the full rubber roller, so that the paper tape is not smeared; the roll paper used for commercial printing is generally coated paper, the gram weight of the roll paper is large, and the tension requirement is high, so that all rubber roll bodies are required to be pressed and pasted on paper tapes to wrap the paper tapes on bottom rolls, and the printing process can be ensured to be stable. In the book printing, cold setting ink is used, and due to the characteristic of the ink, the ink cannot be dried by a drying system and can be solidified only by natural air cooling, but the printing speed of the traditional book rotary printing machine is relatively high, the ink is not completely solidified when the paper path enters a back tension system (particularly, the ink is not completely solidified even if the printing speed is relatively low, the paper path does not enter the back tension system), and after the paper tape which is not completely solidified by the ink enters the back tension system, long ink drag marks exist on the paper tape after the bottom roller and the full rubber roller are pressed and stuck, and the smearing is serious.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a back tension system of a printing color group of a rotary printing machine, which not only increases the application range of the back tension system, but also solves the problem that paper tape is easy to smear during printing books and periodicals.
The purpose of the utility model is realized in the following way: a back tension system of a printing color set of a rotary press comprises a tension detection roller, a bottom roller, a paper pressing roller and a paper pressing wheel, wherein the tension detection roller, the bottom roller, the paper pressing roller and the paper pressing wheel are sequentially arranged between two wallboards along a paper path; one end of the bottom roller is connected with a servo motor; the paper pressing roller is connected with a paper pressing roller driving mechanism, the paper pressing roller driving mechanism comprises two connecting rods and two paper pressing roller cylinders, one ends of the two connecting rods are hinged to two pivot pins in a one-to-one correspondence manner, and the two pivot pins are fixed on the inner side surfaces of the two wallboards in a one-to-one correspondence manner; the other ends of the two connecting rods are hinged with the two platen roller cylinders in a one-to-one correspondence manner; the paper pressing roller is bridged at the middle parts of the two connecting rods; wherein, the liquid crystal display device comprises a liquid crystal display device,
the paper pressing wheel comprises five paper pressing wheel monomers which are arranged on a fixed shaft bridged between two wallboards; two paper pressing wheel monomers arranged at two ends of the fixed shaft are opposite to the edges of two sides of the paper tape in a one-to-one correspondence manner, and three paper pressing wheel monomers arranged in the middle of the fixed shaft are opposite to the blank of the printing plate surface of the paper tape in a one-to-one correspondence manner;
each paper pressing wheel unit comprises a rocker arm, a cylinder support, a paper pressing wheel cylinder and a paper pressing wheel body; one end of the rocker arm is rotatably sleeved on the fixed shaft, the other end of the rocker arm is provided with an upper mounting hole and a lower mounting hole, and a fulcrum pin is fixed in the upper mounting hole through a clamping ring; one end of the cylinder support is an open clamping sleeve and is tightly sleeved on the fixed shaft through a locking screw; the tail end of the cylinder body of the paper pressing wheel cylinder is connected with the other end of the cylinder support, and the end head of the piston rod of the paper pressing wheel cylinder is hinged with the fulcrum pin; the paper pressing wheel body comprises a wheel shaft inserted into the lower mounting hole of the rocker arm, a bearing arranged on the wheel shaft, a rubber wheel mounting seat sleeved on the outer ring of the bearing and a rubber pressing wheel arranged on the rubber wheel mounting seat.
The rear tension system for the printing color group of the rotary press further comprises a first paper guide roller arranged in front of the tension detection roller along the paper path, a second paper guide roller arranged between the tension detection roller and the bottom roller, and a third paper guide roller and a fourth paper guide roller which are sequentially arranged behind the bottom roller.
The rear tension system of the printing color set of the rotary printing machine comprises a rubber wheel mounting seat, a bearing, a first retaining ring, a second retaining ring, a third retaining ring, a fourth retaining ring and a fourth retaining ring, wherein the rubber wheel mounting seat is sleeved on the outer ring of the bearing; the rubber pinch roller is installed on the rubber wheel installation seat through a plurality of screws.
The rear tension system of the printing color set of the rotary press comprises a paper pressing wheel body, wherein the paper pressing wheel body further comprises a wheel shield, and an axle opening of the wheel shield is sleeved on the axle and is fastened through an axle nut.
The post-tensioning system of the printing color group of the rotary printing machine has the following characteristics: .
1. The paper pressing wheel is additionally arranged on the other side of the bottom roller, so that the application range of the back tension system is increased, and the back tension system can be used for a book and periodical rotary printing machine, a commercial printing machine and a commercial/book compatible printing rotary printing machine.
2. The paper pressing wheel is formed by adopting the five paper pressing wheel monomers, and the five paper pressing wheel monomers are arranged in the area of the paper tape where the images and texts are not printed, so that the problem that the paper tape is easy to smear during the printing of books and periodicals is perfectly solved.
Drawings
FIG. 1 is a schematic structural view of a rear tension system of a printing color set of a rotary press of the present utility model;
FIG. 2 is a schematic view of the installation of the platen roller assembly in the post-tensioning system of the present utility model;
FIG. 3 is a schematic view of the structure of the platen in the back tension system of the present utility model;
fig. 4 is a top view (partially cut away) of fig. 3.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, the rear tension system of the printing color set of the rotary press of the present utility model includes a first paper guide roller 1, a tension detection roller 2, a second paper guide roller 3, a bottom roller 4, a third paper guide roller 5 and a fourth paper guide roller 6, which are bridged between two wall plates 10 and are sequentially arranged along a paper path, a platen roller 7 provided at a paper feeding side of the bottom roller 4, and a platen roller 8 provided at a paper discharging side of the bottom roller.
The bottom roller 4 is driven by a connecting servo motor 40 and a timing belt transmission mechanism 41.
The platen roller 7 is connected with a platen roller driving mechanism which comprises two connecting rods 71 and two platen roller cylinders 70, one ends of the two connecting rods 71 are hinged with two pivot pins 72 in a one-to-one correspondence manner, and the two pivot pins 72 are fixed on the inner side surfaces of the two wallboards 10 in a one-to-one correspondence manner; the other ends of the two connecting rods 71 are hinged in a one-to-one correspondence with the piston rods of the two platen roller cylinders 70; the platen roller 7 is bridged at the middle parts of the two connecting rods 71; the platen roller 7 is separated from or combined with the base roller 4 by the expansion and contraction of the piston rods of the two platen roller cylinders 70.
The platen roller 8 comprises five platen roller units 8A mounted on a fixed shaft 80 bridging between two wall plates 10; two platen roller units 8A mounted on both ends of the fixed shaft 80 face the both side edges of the paper tape 100 in one-to-one correspondence, and three platen roller units 8A mounted in the middle of the fixed shaft 80 face the blank positions of the printing plate surface of the paper tape 100 in one-to-one correspondence.
Each platen roller unit 8A includes a rocker arm 81, a cylinder mount 83, a platen roller cylinder 84, and a platen roller body; one end of the rocker arm 81 is rotatably sleeved on the fixed shaft 80, the other end of the rocker arm 81 is provided with an upper mounting hole and a lower mounting hole, and a fulcrum pin 82 is fixed in the upper mounting hole through a clamping ring 820; one end of the cylinder support 83 is an open clamping sleeve and is tightly sleeved on the fixed shaft 80 through a locking screw 830; the tail end of the cylinder body of the paper pressing wheel cylinder 84 is connected with the other end of the cylinder support 83, and the end head of the piston rod of the paper pressing wheel cylinder 84 is hinged with the fulcrum pin 82; the paper pressing wheel body comprises a wheel shield 85, an axle 86 inserted in a lower mounting hole of the rocker arm 81 and in an axle opening of the wheel shield 85, a bearing 87 arranged on the axle 86, a rubber wheel mounting seat 88 sleeved on an outer ring of the bearing 87 and a rubber pressing wheel 89 arranged on the rubber wheel mounting seat 88; the wheel shaft 86 is fastened in the lower mounting hole of the swing arm 81 by a nut 860; the rubber wheel mounting seat 88 is sleeved on the outer ring of the bearing 87 through two check rings 880; rubber pinch roller 89 is mounted on rubber wheel mount 88 by a plurality of screws 890.
In the back tension system of the printing color group of the rotary printer, when the system works, a paper tape 100 sequentially passes through a first paper guide roller 1, a tension detection roller 2, a second paper guide roller 3, a bottom roller 4, a third paper guide roller 5 and a fourth paper guide roller 6, is pressed and wrapped on the bottom roller 4 through a paper pressing roller 7 or a paper pressing roller 8, the tension detection roller 2 detects the tension fluctuation of the paper tape 100 and feeds back the tension fluctuation to a servo motor 40, and the servo motor 40 drives the bottom roller 4 to adjust according to the tension fluctuation condition of the paper tape 100. Thereby continuously providing a steady tension to web 100. The platen roller 7 is controlled by a platen roller cylinder 70 to separate the platen roller 7 from the base roller 4. The platen 8 is controlled by a platen cylinder 84 to engage and disengage the bottom roller 4. The switching of the use of the platen roller 7 or the platen roller 8 can be selected by a manual valve on the operation panel. When the printing machine prints coated paper (i.e. commercial printing), the paper strip 100 is pressed with the platen roller 7 in line with the bottom roller 4; when the printing machine prints offset paper (namely books and periodicals are printed), the press wheel 8 consisting of five press wheel monomers 8A is switched to be matched with the bottom roller 4 to press the paper tape 100. If there is a change in the size of the web being printed, the locking screw 830 on the pinch roller unit 8A may be released to move the pinch roller unit 8A to the corresponding position. In this way, the rubber pinch rollers 89 on the five paper pressing wheel monomers 8A of the paper pressing wheel 8 are correspondingly pressed at five blank positions of the paper tape 100 all the time one by one, so that the printed image-text area is avoided, and the situation of smearing the paper tape 100 can be avoided; in addition, because the roll paper used for book printing is generally offset paper, the gram weight of the roll paper is smaller (generally 60-80g/m 2 ) The tension requirement of the paper tape is also common, so that the paper tape is pressed by using five paper pressing wheel monomers, and the tension stability in the printing process can be ensured.
The above embodiments are provided for illustrating the present utility model and not for limiting the present utility model, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present utility model, and thus all equivalent technical solutions should be defined by the claims.
Claims (4)
1. A back tension system of a rotary press printing color group comprises a tension detection roller, a bottom roller and a paper pressing roller, wherein the tension detection roller, the bottom roller and the paper pressing roller are sequentially arranged between two wallboards along a paper path; one end of the bottom roller is connected with a servo motor; the paper pressing roller is connected with a paper pressing roller driving mechanism, the paper pressing roller driving mechanism comprises two connecting rods and two paper pressing roller cylinders, one ends of the two connecting rods are hinged to two pivot pins in a one-to-one correspondence manner, and the two pivot pins are fixed on the inner side surfaces of the two wallboards in a one-to-one correspondence manner; the other ends of the two connecting rods are hinged with the two platen roller cylinders in a one-to-one correspondence manner; the paper pressing roller is bridged at the middle parts of the two connecting rods; the back tension system is characterized by further comprising a paper pressing wheel which is matched with the other side of the bottom roller;
the paper pressing wheel comprises five paper pressing wheel monomers which are arranged on a fixed shaft bridged between two wallboards; two paper pressing wheel monomers arranged at two ends of the fixed shaft are opposite to the edges of two sides of the paper tape in a one-to-one correspondence manner, and three paper pressing wheel monomers arranged in the middle of the fixed shaft are opposite to the blank of the printing plate surface of the paper tape in a one-to-one correspondence manner;
each paper pressing wheel unit comprises a rocker arm, a cylinder support, a paper pressing wheel cylinder and a paper pressing wheel body; one end of the rocker arm is rotatably sleeved on the fixed shaft, the other end of the rocker arm is provided with an upper mounting hole and a lower mounting hole, and a fulcrum pin is fixed in the upper mounting hole through a clamping ring; one end of the cylinder support is an open clamping sleeve and is tightly sleeved on the fixed shaft through a locking screw; the tail end of the cylinder body of the paper pressing wheel cylinder is connected with the other end of the cylinder support, and the end head of the piston rod of the paper pressing wheel cylinder is hinged with the fulcrum pin; the paper pressing wheel body comprises a wheel shaft inserted into the lower mounting hole of the rocker arm, a bearing arranged on the wheel shaft, a rubber wheel mounting seat sleeved on the outer ring of the bearing and a rubber pressing wheel arranged on the rubber wheel mounting seat.
2. The back tension system of a rotary press printing color train of claim 1, further comprising a first guide roller disposed before the tension detecting roller along the paper path, a second guide roller disposed between the tension detecting roller and the bottom roller, a third guide roller and a fourth guide roller disposed sequentially after the bottom roller.
3. The back tension system of a rotary press printing group according to claim 1, wherein the rubber wheel mount is sleeved on the outer ring of the bearing by two retainers; the rubber pinch roller is installed on the rubber wheel installation seat through a plurality of screws.
4. The back tension system of a rotary press printing group as recited in claim 1, wherein said platen body further comprises a wheel guard having an axle opening that fits over said axle and is secured by an axle nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223316109.5U CN219341160U (en) | 2022-12-09 | 2022-12-09 | Rear tension system of printing color group of rotary press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223316109.5U CN219341160U (en) | 2022-12-09 | 2022-12-09 | Rear tension system of printing color group of rotary press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219341160U true CN219341160U (en) | 2023-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223316109.5U Active CN219341160U (en) | 2022-12-09 | 2022-12-09 | Rear tension system of printing color group of rotary press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219341160U (en) |
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- 2022-12-09 CN CN202223316109.5U patent/CN219341160U/en active Active
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