CN113682059A - Automatic double-sided printing mechanism capable of guaranteeing reverse side skew rate - Google Patents
Automatic double-sided printing mechanism capable of guaranteeing reverse side skew rate Download PDFInfo
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- CN113682059A CN113682059A CN202111063091.XA CN202111063091A CN113682059A CN 113682059 A CN113682059 A CN 113682059A CN 202111063091 A CN202111063091 A CN 202111063091A CN 113682059 A CN113682059 A CN 113682059A
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- paper
- paper feeding
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- roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0045—Guides for printing material
- B41J11/0055—Lateral guides, e.g. guides for preventing skewed conveyance of printing material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/009—Diverting sheets at a section where at least two sheet conveying paths converge, e.g. by a movable switching guide that blocks access to one conveying path and guides the sheet to another path, e.g. when a sheet conveying direction is reversed after printing on the front of the sheet has been finished and the sheet is guided to a sheet turning path for printing on the back
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Abstract
本发明提供一种保证反面歪斜率的自动双面打印机构，包括：整机主框架和设置在所述整机主框架上的正面送纸装置、正反纸路切换装置、反面纸张引导校正装置和反面送纸装置；纸张通过所述正面进纸装置传输，经过所述正反纸路切换装置改变所述纸张的运动方向后通过所述反面纸张引导校正装置对反面的所述纸张进行校正，经所述反面送纸装置传输至所述正面进纸装置中进行反面打印并输出打印好的纸张。本发明的有益效果是负责翻面纸张自动校正的校正板安装在纸路支架上，反面送纸装置中负责纸张输送的主动辊一级反面送纸胶辊和二级反面送纸胶辊均同样安装在该纸路支架上，相较整体可插拔的反面送纸托盘，大大降低了反面打印的歪斜率。
The invention provides an automatic double-sided printing mechanism that ensures the skew rate of the reverse side, comprising: a main frame of the whole machine, a front paper feeding device, a front and back paper path switching device, and a reverse paper guiding and correcting device arranged on the main frame of the whole machine and a reverse paper feeding device; the paper is transported through the front paper feeding device, and the paper on the reverse side is corrected by the reverse paper guiding and correcting device after changing the moving direction of the paper through the front and reverse paper path switching device, The paper is transported to the front paper feeding device through the reverse paper feeding device to perform reverse printing and output the printed paper. The beneficial effect of the present invention is that the correction plate responsible for the automatic correction of the flipped paper is installed on the paper path support, and the first-level reverse paper feeding rubber roller and the second-level reverse paper feeding rubber roller of the driving roller responsible for paper conveying in the reverse paper feeding device are the same Installed on the paper path support, compared with the overall pluggable reverse paper feed tray, the skew rate of reverse printing is greatly reduced.
Description
Technical Field
The invention belongs to the field of laser printers, and particularly relates to an automatic double-sided printing mechanism capable of ensuring reverse skew rate.
Background
With the development of the times, more and more printer products with automatic double-sided printing functions are brought into the market for reasons of cost saving, convenience for user operation and the like, and among numerous technical indexes of the products, the reverse skew rate is a relatively difficult index to guarantee.
A conventional reverse side paper feeding device is a reverse side paper feeding tray that is pluggable with respect to the whole machine, and mainly includes a paper supporting tray serving as a paper path support, a reverse paper feeding rubber roller and a pressure roller that are responsible for conveying paper, a guide member that guides paper into the paper supporting tray, and a correction member that corrects an inclined posture of the paper during the paper advancing process. The reverse paper feeding rubber roller, the guide piece and the correcting piece are directly arranged on the paper supporting plate, and the paper supporting plate can be plugged relative to the whole machine, namely a front paper feeding path, so that the reverse skew rate of the reverse paper feeding device is not easy to guarantee.
Disclosure of Invention
The invention aims to provide an automatic double-sided printing mechanism for ensuring reverse side skew rate, which can effectively ensure the reverse side printing skew rate.
In order to solve the technical problems, the invention adopts the technical scheme that: an automatic duplex printing mechanism for ensuring reverse skew rate, comprising: the paper guide device comprises a main frame of the whole machine, and a front paper feeding device, a front and back paper path switching device, a back paper guide correcting device and a back paper feeding device which are arranged on the main frame of the whole machine;
the paper is transmitted through the front paper feeding device, the movement direction of the paper is changed through the front and back paper path switching device, then the paper on the back side is corrected through the back paper guide correction device, and the paper is transmitted to the front paper feeding device through the back paper feeding device to be printed on the back side and the printed paper is output.
Further, the front paper feeding device comprises a paper twisting roller assembly and a plurality of pairs of front paper feeding rollers, wherein the paper twisting roller assembly is used for taking out the paper from the paper bin;
the multi-pair of facing paper feed rollers includes: the paper is taken out by the paper rubbing roller assembly and then sequentially passes through the paper feeding assembly, the imaging transfer printing assembly, the image fixing assembly and the paper discharging assembly to be output or enter the reverse paper feeding device;
the paper feeding assembly and the paper discharging assembly are at least provided with one group.
Further, the paper feeding assembly includes: the paper feeding device comprises a primary front paper feeding assembly and a secondary front paper feeding assembly, wherein the primary front paper feeding assembly is a primary paper feeding rubber roller and a primary paper feeding pressure roller which are in compression fit; the secondary front paper feeding component is a secondary paper feeding rubber roller and a secondary paper feeding pressure roller which are in compression fit; the primary front paper feeding assembly is arranged at the upstream of the secondary front paper feeding assembly;
the imaging transfer printing component comprises a photosensitive drum and a transfer printing roller which are in press fit and used for realizing image transfer printing;
the image fixing component comprises a heating roller and a fixing rubber roller which are in compression fit, and is used for realizing image fixing;
the paper outlet assembly comprises a primary paper outlet assembly and a secondary paper outlet assembly, wherein the primary paper outlet assembly is a primary paper outlet rubber roller and a primary paper outlet pressure roller which are in compression fit; the secondary paper outlet assembly is a secondary paper outlet rubber roller and a secondary paper outlet pressure roller which are in compression fit; the first-stage paper outlet assembly is arranged at the upstream of the second-stage paper outlet assembly.
Further, the forward and reverse paper path switching device includes: the reversing relay and the reversing gear assembly are meshed through at least one transmission gear to drive the secondary paper discharging rubber roller;
the reversing relay controls an output gear of the reversing gear assembly to change the rotating direction by changing the suction state, and is used for driving the second-stage paper outlet rubber roller to change the rotating direction.
Furthermore, the paper guide correcting device comprises a correcting plate, the correcting plate comprises a horn mouth structure arranged at the head of the correcting plate and an edge structure extending from the horn mouth structure to a position far away from the horn mouth structure, and the correcting plate is used for guiding the paper to enter the reverse paper feeding device and correcting the paper.
Further, the reverse paper feeding device comprises a plurality of pairs of reverse paper feeding rollers for transmitting the paper to the front paper feeding device.
Further, the reverse paper feeding roller includes: the paper feeding device comprises a first-stage reverse side paper feeding assembly and a second-stage reverse side paper feeding assembly, wherein the first-stage reverse side paper feeding assembly comprises a first-stage reverse side paper feeding rubber roll and a first-stage reverse side paper feeding pressure roll which are in press fit, and the second-stage reverse side paper feeding assembly comprises a second-stage reverse side paper feeding rubber roll and a second-stage reverse side paper feeding pressure roll which are in press fit;
the first-stage reverse side paper feeding assembly is arranged at the upstream of the second-stage reverse side paper feeding assembly.
Further, the correcting plate, the primary reverse side paper feeding rubber roll, the primary reverse side paper feeding pressure roll and the secondary reverse side paper feeding rubber roll are all arranged on the double-sided paper path bracket;
the edge structure of the correcting plate is arranged on one side of the double-sided paper path support, the horn mouth structure extends out of the double-sided paper path support, and the first-stage reverse paper feeding rubber roll and the first-stage reverse paper feeding pressure roll which are in press fit with each other are arranged close to the edge structure and used for correcting the paper;
the secondary reverse paper feeding rubber roll is arranged at the downstream of the primary reverse paper feeding assembly on the double-sided paper path bracket.
Further, the paper twisting roller assembly and the primary paper feeding rubber roller are arranged on a paper taking roller bracket, and the secondary reverse paper feeding pressure roller is arranged on the paper taking roller bracket;
the primary paper feeding pressure roller is arranged on a paper feeding channel frame, and the paper feeding channel frame is connected with the paper taking roller bracket;
the secondary paper feeding rubber roll, the secondary paper feeding pressure roll and the transfer roll are arranged on the printing paper path bracket;
the heating roller, the fixing rubber roller, the primary paper outlet rubber roller and the primary paper outlet pressure roller are all arranged on the fixing unit;
the secondary paper outlet rubber roll and the secondary paper outlet pressure roll are arranged on the secondary paper outlet roll bracket;
the back paper path bracket is arranged on the double-sided paper path bracket and is used for supporting and limiting the paper to be transmitted to the image fixing component by the imaging transfer printing component;
the paper taking roller support, the paper feeding channel frame, the printing paper path support, the rear paper path support, the fixing unit, the secondary paper outlet roller support and the double-sided paper path support are matched to form a main paper path.
Further, the complete machine main frame includes: the left support, the right support, set up in LSU support of complete machine main frame top and set up in the machine bottom support of complete machine main frame below.
Further, the main paper path is arranged between the left bracket and the right bracket; the photosensitive drum is arranged above the main paper path between the left support and the right support.
Due to the adoption of the technical scheme, the method has the following beneficial effects:
the correcting plate responsible for automatic correction of the turnover paper is arranged on the paper path support, and the primary reverse paper feeding rubber roller and the secondary reverse paper feeding rubber roller of the driving roller responsible for paper conveying in the reverse paper feeding device are also arranged on the paper path support.
Drawings
FIG. 1 is a schematic illustration of a duplex paper path according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a device for switching between a front paper path and a reverse paper path according to an embodiment of the present invention;
FIG. 3 is a schematic view of the mounting positions of the pickup roller assembly and the first-stage paper feeding rubber roller according to an embodiment of the present invention;
FIG. 4 is a schematic view of a primary paper feed pressure roller installation position according to an embodiment of the present invention;
FIG. 5 is a schematic view of the mounting positions of the secondary paper feeding rubber roller, the secondary paper feeding pressure roller and the transfer roller according to one embodiment of the present invention;
FIG. 6 is a schematic view of the installation positions of the reverse side correction plate, the primary reverse side paper feeding rubber roll, the primary reverse side paper feeding pressure roll and the secondary reverse side paper feeding rubber roll according to one embodiment of the invention;
FIG. 7 is a schematic view of a reverse correction plate according to an embodiment of the present invention;
FIG. 8 is a schematic illustration of a main paper path structure according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a fixing unit according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of the mounting positions of the secondary paper output rubber roller and the secondary paper output pressure roller according to one embodiment of the invention;
FIG. 11 is a schematic structural diagram of a main frame of the whole machine according to an embodiment of the present invention;
FIG. 12 is a schematic view of the overall mounting structure of one embodiment of the present invention;
FIG. 13 is an exploded view of one direction of the reversing gear assembly of one embodiment of the present invention;
FIG. 14 is an exploded view of the reversing gear assembly of one embodiment of the present invention in another orientation;
FIG. 15 is a schematic view of the connection of a follower disk to an outer nest in accordance with one embodiment of the present invention;
fig. 16 is a sectional view of a fixing unit structure according to an embodiment of the present invention.
In the figure:
1-1, a paper twisting roller assembly 1-2-1, a first-stage paper feeding rubber roller 1-2-2, a first-stage paper feeding pressure roller
1-3-1, 1-3-2 two-stage paper feeding rubber roller and two-stage paper feeding pressure roller
1-4-1, photosensitive drum 1-4-2, transfer roller
1-5-1, 1-5-2 heating rollers, 1-6-1 fixing rubber roller and 1-6-1 first-stage paper output rubber roller
1-6-2, a primary paper output pressure roller 1-7-1 and a secondary paper output rubber roller
2-1, 2-2 reversing relays, 1-7-2 reversing gear assemblies and two-stage paper output pressure rollers
2-3 parts of outer clamping ring 2-4 parts of follower disk and 2-5 parts of input gear roller
2-6 parts of inner embedded sleeve 2-7 parts of outer embedded sleeve 2-8 parts of output gear
2-9 parts of long groove 2-10 parts of circumferential groove 2-11 parts of clamping hook
2-12 parts of limiting column 2-13 parts of follow-up hook 2-14 parts of planetary gear
2-15, a main transmission unit 3, a correction plate 3-1 and a bell mouth structure
3-2 parts of seamed edge structure 4-1-1 parts of primary reverse paper feeding rubber roll
4-1-2 primary reverse paper feeding pressure roller
4-2-1 two-stage reverse paper feeding rubber roller
5-1, 5-2 and right supports
4-2-2, 5-3 parts of two-stage reverse paper feeding pressure roller, 5-4 parts of LSU bracket and bottom bracket of machine
5-5 parts of laser scanner 1-8 parts of paper taking roller bracket
1-9 parts of paper feeding channel frame 1-10 parts of paper feeding channel frame, 1-11 parts of printing paper path support frame and rear paper path support frame
1-12 parts of fixing unit, 1-13 parts of fixing unit, 4-3 parts of secondary paper outlet roller bracket and double-sided paper path bracket
4-4 parts of double-sided paper path tray 4-5 parts of double-sided inlet cover plate
Detailed Description
The invention is further illustrated by the following examples and figures:
in one embodiment of the present invention, an automatic duplex printing mechanism for ensuring reverse skew comprises: the paper conveying device comprises a main frame of the whole machine, a front paper conveying device, a front paper path switching device, a back paper guiding and correcting device and a back paper conveying device, wherein the front paper conveying device, the front paper path switching device, the back paper guiding and correcting device and the back paper conveying device are all arranged on the main frame of the whole machine, the paper is conveyed through the front paper conveying device, the back paper is corrected through the back paper guiding and correcting device after the movement direction of the paper is changed through the front paper path switching device, then the paper is conveyed to the back paper conveying device, and the paper is conveyed to the front paper conveying device through the back paper conveying device to be printed on the back side and output the printed paper. The whole printing paper path is completely installed, so that the installation accuracy is fundamentally ensured, and the reverse skew rate of the whole printing paper path in the printing process is ensured.
As shown in fig. 1, the front paper feeding apparatus includes a pickup roller assembly 1-1 and a plurality of pairs of front paper feeding rollers, a front paper feeding path for feeding paper is shown by a solid curve in fig. 1, and the plurality of pairs of front paper feeding rollers include: the paper feeding assembly, the imaging transfer printing assembly, the image fixing assembly and the paper discharging assembly are arranged, wherein the paper feeding assembly and the paper discharging assembly are at least arranged in one group, in the embodiment, the paper feeding assembly and the paper discharging assembly are respectively provided with two groups, and the skew degree of paper in the transmission operation process is ensured.
Specifically, the paper feed assembly includes: the front paper feeding device comprises a primary front paper feeding assembly and a secondary front paper feeding assembly, wherein the primary front paper feeding assembly comprises a primary paper feeding rubber roller 1-2-1 and a primary paper feeding pressure roller 1-2-2 which are in press fit, the secondary front paper feeding assembly comprises a secondary paper feeding rubber roller 1-3-1 and a secondary paper feeding pressure roller 1-3-2 which are in press fit, the primary front paper feeding assembly is arranged at the upstream of the secondary front paper feeding assembly, in the embodiment, the assembly that paper passes through the assembly first in the paper conveying direction in the paper printing process is defined as the upstream of the assembly, namely, the paper is conveyed to the secondary front paper feeding assembly from the primary front paper feeding assembly.
Specifically, the imaging transfer printing assembly comprises a photosensitive drum 1-4-1 and a transfer roller 1-4-2 which are in press fit, and the imaging transfer printing is completed during the process that paper passes through the photosensitive drum 1-4-1 and the transfer roller 1-4-2.
Specifically, the image fixing component comprises a heating roller 1-5-1 and a fixing rubber roller 1-5-2 which are in press fit, and image fixing is realized in the process that paper passes through the heating roller 1-5-1 and the fixing rubber roller 1-5-2.
The paper discharging component comprises a primary paper discharging component and a secondary paper discharging component, wherein the primary paper discharging component is a primary paper discharging rubber roller 1-6-1 and a primary paper discharging pressure roller 1-6-2 which are in compression fit; the secondary paper output assembly is a secondary paper output rubber roller 1-7-1 and a secondary paper output pressure roller 1-7-2 which are in compression fit; and the one-level paper outlet assembly is arranged at the upstream of the second-level paper outlet assembly, namely, the paper is transmitted to the second-level paper outlet assembly by the one-level paper outlet assembly.
The working process of the whole front paper feeding device is as follows: after the paper is picked up from the paper bin by the paper twisting roller assembly 1-1, the paper passes through the paper feeding assembly, the imaging transfer printing assembly, the image fixing assembly and the paper outlet assembly in sequence and then is output to print paper or enters a reverse paper feeding device, and the method specifically comprises the following steps: the paper is taken out from the paper bin by the paper rubbing roller assembly 1-1, the imaging transfer printing is completed by the first-stage paper feeding rubber roller 1-2-1, the first-stage paper feeding pressure roller 1-2-2, the second-stage paper feeding rubber roller 1-3-1 and the second-stage paper feeding pressure roller 1-3-2, the photosensitive drum 1-4-1 and the transfer roller 1-4-2, the image fixation is realized by the heating roller 1-5-1 and the fixing rubber roller 1-5-2, and the printing paper is output or enters the reverse paper feeding device after passing through the first-stage paper output rubber roller 1-6-1, the first-stage paper output pressure roller 1-6-2, the second-stage paper output rubber roller 1-7-1 and the second-stage paper output pressure roller 1-7-2.
As shown in fig. 1 and 2, the forward/reverse paper path switching device includes: the reversing relay 2-1 and the reversing gear assembly 2-2, the reversing gear assembly 2-2 is meshed with and drives the secondary paper discharging rubber roller 1-7-1 through at least one gear; in the embodiment, as shown in fig. 2, two gears meshed with each other are arranged to realize the transmission connection of the reversing gear assembly 2-2 and the secondary paper discharging rubber roller 1-7-1 in the same direction.
The reversing gear assembly 2-2 includes: the reversing gear comprises an outer clamping ring 2-3, a follow-up disc 2-4, an input gear 2-5, an outer nesting 2-6, an inner nesting 2-7, an output gear 2-8 and planet gears 2-14, wherein the outer clamping ring 2-3, the follow-up disc 2-4, the input gear 2-5, the outer nesting 2-6, the inner nesting 2-7 and the output gear 2-8 are sequentially connected to form a reversing gear assembly 2-2, and a group of planet gears are arranged in the outer nesting 2-6 and the inner nesting 2-7 and used for achieving reversing.
Wherein, a first planet wheel is arranged in the outer nest 2-6; the inner nest 2-7 is provided with a second planet wheel. Two planetary gears are respectively arranged on the gear shafts or gear holes of the inner nests 2-7 and the outer nests 2-6.
Wherein, the input gear 2-5 is provided with an input gear inner tooth meshed with the first planet gear, and the output gear 2-8 is provided with an output gear inner tooth meshed with the second planet gear; meanwhile, the input gear 2-5 is also provided with input gear external teeth, and the output gear 2-8 is also provided with output gear external teeth; one side of the input gear 2-5 close to the follow-up disc 2-4 is also provided with a tooth-shaped groove matched with the follow-up hook 2-13; in this embodiment, the tooth-shaped groove is also arranged on the outer diameter of the input gear 2-5, and the follower hook 2-13 is limited in the tooth-shaped groove of the input gear 2-5 during operation.
As shown in fig. 12 and 13, the outer collar 2-3 is provided with elongated slots 2-9, and the outer collar 2-3 is further provided with circumferential slots 2-10, and the number of the elongated slots 2-9 and the number of the circumferential slots 2-10 can be adjusted adaptively according to the follower disk 2-4 connected with the outer collar 2-3.
The side of the follow-up disc 2-4 close to the outer clamping ring 2-3 is provided with a limiting column 2-12 matched with the long strip groove, and the two sides of the follow-up disc 2-4 are respectively provided with a clamping hook 2-11, in the embodiment, a pair of clamping hooks 2-11 close to the side of the outer clamping ring 2-3 is arranged at the position close to the outer diameter of the follow-up disc 2-4, a pair of clamping hooks 2-11 close to the side of the input gear 2-5 is arranged at the position close to the inner diameter of the follow-up disc 2-4, and in the working process, the pair of clamping hooks 2-11 close to the side of the input gear 2-5 is connected with the concave table of the outer nesting 2-6, as shown in figure 14. One side of the follow-up disc 2-4 close to the outer clamping ring 2-3 is also provided with a follow-up hook 2-13, and the follow-up hook 2-13 is connected in a tooth-shaped groove close to the outer diameter of the follow-up disc 2-4 through a follow-up spring and is used for connecting the input gear 2-5.
As shown in fig. 2, when the reversing relay 2-1 is in a non-attraction state, the metal elastic sheet of the reversing relay 2-1 hooks the convex teeth of the outer collar 2-3 of the reversing gear assembly 2-2, and the outer collar 2-3 of the reversing gear assembly 2-2 is in a locking state; the limiting columns 2-12 on the follow-up discs 2-4 are clamped in the long grooves 2-9 of the outer clamping rings 2-3 and used for locking the follow-up discs 2-4; the hook on the driven disc 2-4 near the outer collar 2-3 is connected to the circumferential groove 2-10, and the hook 2-11 near the input gear 2-5 is connected to the concave table of the outer nest 2-6.
When power is input from the input gear 2-5, the inner teeth of the input gear 2-5 are meshed with the first planet gear, the first planet gear is meshed to drive the second planet gear to rotate, and the second planet gear is meshed with the inner teeth of the output gear to drive the output gear 2-8 to rotate. Thereby realizing the reverse rotation movement of the output gear 2-8 and the input gear 2-5.
When the reversing relay 2-1 is in a pull-in state, the metal elastic sheet of the reversing relay 2-1 is separated from the outer clamping ring 2-3 of the reversing gear assembly 2-2, and the outer clamping ring 2-3 of the reversing gear assembly 2-2 is in a following state and is in a free state; the follow-up hooks 2-13 are tightly meshed in the tooth-shaped grooves of the input gears 2-5 under the action of the follow-up springs and used for locking the follow-up discs 2-4 and the input gears 2-8; the limiting columns 2-12 of the follow-up disc 2-2 are clamped in the long grooves 2-9 of the outer clamping ring 2-3 and used for locking the follow-up disc 2-4, and a clamping hook on the side, close to the outer clamping ring 2-3, of the follow-up disc 2-4 is connected to the annular grooves 2-10, so that the follow-up disc 2-4 rotates along with the input gear 2-8.
Meanwhile, a clamping hook close to one side of the input gear 2-5 is connected to a concave table of the outer embedded sleeve 2-6, and no force capable of being internally meshed exists between the first planet gear and the second planet gear at the moment, namely, a planet gear train formed by the first planet gear and the second planet gear rotates as a whole with the input gear 2-5, so that the inner embedded sleeve 2-4 and the outer embedded sleeve 2-5 simultaneously rotate along with the input gear 2-5. Because the internal planetary gear train does not generate meshing motion, the output gears 2-8 are also driven to rotate in the same direction, and the output gears 2-8 and the input gears 2-5 rotate in the same direction.
The working process of the whole forward and reverse paper path switching device is as follows: the reversing gear assembly 2-2 obtains power input from the main transmission unit 2-15 and outputs the power input to the secondary paper output rubber roller 1-7-1 through meshing of gears of the reversing gear assembly 2-2. When double-sided printing is needed, the reversing relay 2-1 changes the attraction state and controls the output gear of the reversing gear assembly 2-2 to change the rotation direction, so that the secondary paper output rubber roller 1-7-1 is reversed, and meanwhile, the rotation direction of each paper feeding roller in the front paper feeding path is unchanged.
As shown in fig. 6 and 7, the paper guiding and correcting device includes a correcting plate 3, the correcting plate 3 includes a bell mouth structure 3-1 arranged at the head of the correcting plate and a bent edge structure 3-2 extending from the side of the bell mouth structure 3-1 with the smaller diameter to the direction far away from the bell mouth structure 3-1, wherein the size of the edge structure 3-2 is matched with the minimum size of the bell mouth structure 3-1, the bell mouth structure 3-1 plays a role in guiding paper, the bent edge 3-2 corrects reverse paper, and the reverse paper is guided to enter the reverse paper feeding device through the correcting plate 3.
As shown in fig. 1, the reverse paper feeding device includes a plurality of pairs of reverse paper feeding rollers, and a reverse paper feeding path for feeding the paper is shown by a dashed curve in fig. 1, and is used for conveying the paper to the reverse paper feeding device.
Specifically, the multiple pairs of reverse side paper feed rollers include: the paper feeding device comprises a primary reverse side paper feeding assembly and a secondary reverse side paper feeding assembly, wherein the primary reverse side paper feeding assembly comprises a primary reverse side paper feeding rubber roller 4-1-1 and a primary reverse side paper feeding pressure roller 4-1-2 which are in press fit, the primary reverse side paper feeding pressure roller 4-1-2 is obliquely arranged relative to the primary reverse side paper feeding rubber roller 4-1-1, the inclination angle is 5-7 degrees, the secondary reverse side paper feeding assembly comprises a secondary reverse side paper feeding rubber roller 4-2-1 and a secondary reverse side paper feeding pressure roller 4-2-2 which are in press fit, the primary reverse side paper feeding assembly is arranged at the upstream of the secondary reverse side paper feeding assembly, and paper is transmitted to the secondary reverse side paper feeding assembly from the primary reverse side paper feeding assembly.
The whole paper guiding and correcting device and the reverse paper feeding device work in the following processes: as shown in fig. 1 and fig. 6, during double-sided printing, the paper is not completely discharged, the tail end of the paper still stays between the secondary paper discharging rubber roller 1-7-1 and the secondary paper discharging pressure roller 1-7-2, the reversing relay 2-2 is in the attraction state to drive the secondary paper discharging rubber roller 1-7-1 to reverse, the paper is returned to the printer and guided into the reverse paper feeding device through the correcting plate 3, the primary reverse side paper feeding rubber roller 4-1-1 and the primary reverse side paper feeding pressure roller 4-1-2 are arranged on the same side of the correction plate 3, and the primary reverse side paper feeding pressure roller 4-1-2 has an installation inclination angle relative to the paper feeding direction, and the installation inclination angle ensures that paper is driven to be tightly attached to the edge structure 3-2 of the reverse correction plate 3 when the paper is conveyed, so that the paper correction effect is achieved.
The paper passes through the primary reverse side paper feeding rubber roller 4-1-1, the primary reverse side paper feeding pressure roller 4-1-2, the secondary reverse side paper feeding rubber roller 4-2-1 and the secondary reverse side paper feeding pressure roller 4-2-2 and is re-sent to the primary paper feeding rubber roller 1-2-1 and the primary paper feeding pressure roller 1-2-2 in the front paper feeding device, so that the turned paper is subjected to imaging printing again, and finally is fixed and discharged to finish the whole printing process.
As shown in figure 6, the correction plate 3, the primary reverse paper feeding rubber roll 4-1-1, the primary reverse paper feeding pressure roll 4-1-2 and the secondary reverse paper feeding rubber roll 4-2-1 are all installed on the basis of a double-sided paper path bracket 4-3, wherein an edge structure 3-2 of the correction plate 3 is arranged at one side of the double-sided paper path bracket 4-3, a horn mouth structure 3-1 extends out of the double-sided paper path bracket 4-3, and the primary reverse paper feeding rubber roll 4-1-1 and the primary reverse paper feeding pressure roll 4-1-2 which are in press fit with each other are arranged close to the edge structure 3-2, so that the paper is driven to be tightly attached to the edge structure 3-2 of the reverse correction plate 3 when the paper is conveyed, the paper correction effect is achieved, and the secondary reverse paper feeding rubber roll 4-2-1 is arranged at the double-sided paper path bracket 4-2 according to the conveying path and the conveying direction of the paper -3 downstream of the primary reverse side paper feeding assembly, in this embodiment, the secondary reverse side paper feeding rubber roller 4-2-1 is disposed at the opposite side of the bell mouth structure 3-1 on the double side paper path support 4-3, and the secondary reverse side paper feeding rubber roller 4-2-1 is disposed centrally along the entire width breadth of the vertical correction plate 3, while the primary reverse side paper feeding rubber roller 4-1-1 and the primary reverse side paper feeding pressure roller 4-1-2 are not disposed on the entire width breadth, but are disposed at only one side; it is conceivable that the two-stage reverse paper feeding rubber rollers 4-2-1 are arranged according to the paper conveying sequence, and are not limited to the position limitation in the embodiment.
As shown in fig. 1, fig. 3, fig. 4 and fig. 8, the pickup roller assembly 1-1 and the first-stage paper feeding roller 1-2-1 are mounted on the paper taking roller bracket 1-8 according to the paper transmission sequence and transmission path, and the first-stage paper feeding pressure roller 1-2-2 is mounted on the paper feeding channel bracket 1-9, in this embodiment, the paper feeding channel bracket 1-9 is directly fixed on the paper taking roller bracket 1-8, so that the first-stage paper feeding roller 1-2-1 and the first-stage paper feeding pressure roller 1-2-2 are mounted after the paper taking roller bracket 1-8 and the paper feeding channel bracket 1-9 are mounted to control the paper front paper feeding path transmission in a pressing fit manner.
As shown in fig. 1 and 12, the secondary reverse side paper feeding pressure roller 4-2-2 is finally installed on the paper taking roller bracket 1-8 to ensure that the secondary reverse side paper feeding pressure roller is in tight fit with the secondary reverse side paper feeding rubber roller 4-2-1 installed on the double-side paper path bracket 4-3 after installation.
As shown in fig. 1 and 5, the secondary paper feeding rubber roller 1-3-1, the secondary paper feeding pressure roller 1-3-2 and the transfer roller 1-4-2 are all installed on the basis of the printing paper path bracket 1-10, the secondary paper feeding rubber roller 1-3-1 and the secondary paper feeding pressure roller 1-3-2 are in tight fit, and the transfer roller 1-4-2 is arranged at the downstream of the secondary paper feeding rubber roller 1-3-1 and the secondary paper feeding pressure roller 1-3-2, so that the paper conveyed by the secondary paper feeding rubber roller 1-3-1 and the secondary paper feeding pressure roller 1-3-2 is ensured to be conveyed to the transfer roller 1-4-2.
As shown in FIG. 1, FIG. 9 and FIG. 16, the heating roller 1-5-1, the fixing rubber roller 1-5-2, the first-stage paper output rubber roller 1-6-1 and the first-stage paper output pressure roller 1-6-2 all belong to the internal components of the fixing unit 1-12, wherein the heating roller 1-5-1 and the fixing rubber roller 1-5-2 are in tight fit, the primary paper output rubber roller 1-6-1 and the primary paper output pressure roller 1-6-2 are in tight fit and are positioned at the downstream of the heating roller 1-5-1 and the fixing rubber roller 1-5-2, and the paper conveyed by the heating roller 1-5-1 and the fixing rubber roller 1-5-2 is ensured to enter the primary paper output rubber roller 1-6-1 and the primary paper output pressure roller 1-6-2.
As shown in fig. 1 and 10, the secondary paper output rubber roller 1-7-1 and the secondary paper output pressure roller 1-7-2 are both mounted on the secondary paper output roller bracket 1-13, and the secondary paper output rubber roller 1-7-1 and the secondary paper output pressure roller 1-7-2 are in tight fit.
As shown in fig. 8, the rear paper path bracket 1-11 is directly fixed on the double-sided paper path bracket 4-3. Play and link up the effect that formation of image rendition subassembly paper way and image are being decided the subassembly paper way, guarantee that the paper is transmitted to the image by formation of image rendition subassembly and is being supported when deciding the subassembly in the printer to play spacing effect, make the transport and the operation of paper more smooth and easy.
In the embodiment, the paper feeding channel frame 1-9, the paper taking roller frame 1-8, the printing paper path frame 1-10, the fixing unit 1-12, the secondary paper outlet roller frame 1-13, the double-sided paper path frame 4-3 and the rear paper path frame 1-11 form a main paper path of the whole machine, and the whole main paper path is arranged on a main frame of the whole machine.
As shown in fig. 11, the main frame of the whole machine includes: the machine comprises a left support 5-1, a right support 5-2, an LSU support 5-3 and a machine bottom support 5-4, wherein the main frame of the whole machine comprises the left support 5-1, the right support 5-2, the machine bottom support 5-4 arranged below the main frame of the whole machine and the LSU support 5-3 arranged above the main frame of the whole machine. In the embodiment, the left support 5-1, the right support 5-2, the LSU support 5-3 and the machine bottom support 5-4 are made of sheet metal materials, so that the strength is high, the assembly precision is good, and the positioning precision of each part of the machine is easier to ensure. The laser scanner 5-5 is directly fixed on the LSU support 5-3 at the side away from the base support 5-4 and is used for applying laser to the photosensitive drum 1-4-1 of the toner cartridge in the laser printing process.
In this embodiment, the paper feed channel frame 1-9, the paper taking roller frame 1-8, the printing paper path frame 1-10, the double-sided paper path frame 4-3 and the rear paper path frame 1-11 are directly installed between the left frame 5-1 and the right frame 5-2, the fixing unit 1-12 and the secondary paper output roller frame 1-13 are both fixed on the left frame 5-1 and the right frame 5-2 from the rear of the whole machine, as shown in fig. 1 and 12, in this embodiment, it is specified that the paper rubbing roller assembly 1-1 is installed in front of the whole machine as shown in fig. 1, the heating roller 1-5-1, the fixing rubber roller 1-5-2, the primary paper output rubber roller 1-6-1 and the primary paper output pressure roller 1-6-2 which are located at the opposite side of the paper rubbing roller assembly 1-1 as shown in fig. 1, The secondary paper output rubber roller 1-7-1 and the secondary paper output pressure roller 1-7-2 are arranged behind the whole machine, namely the fixing unit 1-12 and the secondary paper output roller bracket 1-13 are arranged behind the whole machine. The photosensitive drum 1-4-1 is an internal part of the selenium drum unit, and the photosensitive drum 1-4-1 is directly placed above the main paper path along the slide ways on the left bracket 5-1 and the right bracket 5-2.
As shown in fig. 12, the duplex paper path tray 4-4 located below the duplex paper path bracket 4-3 is mounted on the duplex inlet cover plate 4-5 and can rotate around the mounting shaft, and the duplex inlet cover plate 4-5 is directly mounted on the left bracket 5-1 and the right bracket 5-2 and is used for supporting paper conveyed from the reverse side. The double-sided paper path tray 4-4 only plays a role of carrying the reverse paper, and the tray can be lifted to clear the jam when the reverse jam occurs.
Compared with the prior art, the whole reverse paper feeding tray is a unit part which can be inserted and pulled relative to the movement, and the paper feeding roller, the correcting part and the driving gear are all arranged on the inserted and pulled tray. In the embodiment, the roller for feeding paper on the reverse side and the correction plate are arranged on the double-sided paper path bracket, and the driving gear of the paper feeding roller is directly arranged in the transmission unit, so that the position precision and the transmission precision are easier to ensure.
The correcting plate responsible for automatic correction of the turnover paper is arranged on a paper path support of the machine core, and a primary reverse paper feeding rubber roller and a secondary reverse paper feeding rubber roller of a driving roller responsible for paper conveying in the reverse paper feeding device are also arranged on the paper path support.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (11)
1. An automatic duplex printing mechanism for ensuring reverse skew rate, comprising: the paper guide device comprises a main frame of the whole machine, and a front paper feeding device, a front and back paper path switching device, a back paper guide correcting device and a back paper feeding device which are arranged on the main frame of the whole machine;
the paper is transmitted through the front paper feeding device, the movement direction of the paper is changed through the front and back paper path switching device, then the paper on the back side is corrected through the back paper guide correction device, and the paper is transmitted to the front paper feeding device through the back paper feeding device to be printed on the back side and the printed paper is output.
2. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 1, wherein: the front paper feeding device comprises a paper twisting roller assembly and a plurality of pairs of front paper feeding rollers, and the paper twisting roller assembly is used for taking out the paper from the paper bin;
the multi-pair of facing paper feed rollers includes: the paper is taken out by the paper rubbing roller assembly and then sequentially passes through the paper feeding assembly, the imaging transfer printing assembly, the image fixing assembly and the paper discharging assembly to be output or enter the reverse paper feeding device;
the paper feeding assembly and the paper discharging assembly are at least provided with one group.
3. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 2, wherein: the paper feeding assembly includes: the paper feeding device comprises a primary front paper feeding assembly and a secondary front paper feeding assembly, wherein the primary front paper feeding assembly is a primary paper feeding rubber roller and a primary paper feeding pressure roller which are in compression fit; the secondary front paper feeding component is a secondary paper feeding rubber roller and a secondary paper feeding pressure roller which are in compression fit; the primary front paper feeding assembly is arranged at the upstream of the secondary front paper feeding assembly;
the imaging transfer printing component comprises a photosensitive drum and a transfer printing roller which are in press fit and used for realizing image transfer printing;
the image fixing component comprises a heating roller and a fixing rubber roller which are in compression fit, and is used for realizing image fixing;
the paper outlet assembly comprises a primary paper outlet assembly and a secondary paper outlet assembly, wherein the primary paper outlet assembly is a primary paper outlet rubber roller and a primary paper outlet pressure roller which are in compression fit; the secondary paper outlet assembly is a secondary paper outlet rubber roller and a secondary paper outlet pressure roller which are in compression fit; the first-stage paper outlet assembly is arranged at the upstream of the second-stage paper outlet assembly.
4. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 3, wherein: the positive and negative paper path switching device comprises: the reversing relay and the reversing gear assembly are meshed through at least one transmission gear to drive the secondary paper discharging rubber roller;
the reversing relay controls an output gear of the reversing gear assembly to change the rotating direction by changing the suction state, and is used for driving the second-stage paper outlet rubber roller to change the rotating direction.
5. An automatic duplex printing mechanism for ensuring reverse skew ratio according to claim 3 or 4, wherein: the paper guiding and correcting device comprises a correcting plate, the correcting plate comprises a horn mouth structure arranged at the head of the correcting plate and an edge structure extending from the horn mouth structure to a position far away from the horn mouth structure, and the correcting plate is used for guiding paper to enter the reverse paper feeding device and correcting the paper.
6. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 5, wherein: the reverse paper feeding device comprises a plurality of pairs of reverse paper feeding rollers for transmitting the paper to the front paper feeding device.
7. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 6, wherein: the reverse paper feeding roller includes: the paper feeding device comprises a first-stage reverse side paper feeding assembly and a second-stage reverse side paper feeding assembly, wherein the first-stage reverse side paper feeding assembly comprises a first-stage reverse side paper feeding rubber roll and a first-stage reverse side paper feeding pressure roll which are in press fit, and the second-stage reverse side paper feeding assembly comprises a second-stage reverse side paper feeding rubber roll and a second-stage reverse side paper feeding pressure roll which are in press fit;
the first-stage reverse side paper feeding assembly is arranged at the upstream of the second-stage reverse side paper feeding assembly.
8. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 7, wherein: the correcting plate, the primary reverse side paper feeding rubber roll, the primary reverse side paper feeding pressure roll and the secondary reverse side paper feeding rubber roll are all arranged on the double-sided paper path bracket;
the edge structure of the correcting plate is arranged on one side of the double-sided paper path support, the horn mouth structure extends out of the double-sided paper path support, and the first-stage reverse paper feeding rubber roll and the first-stage reverse paper feeding pressure roll which are in press fit with each other are arranged close to the edge structure and used for correcting the paper;
the secondary reverse paper feeding rubber roll is arranged at the downstream of the primary reverse paper feeding assembly on the double-sided paper path bracket.
9. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 8, wherein: the paper rubbing roller assembly and the primary paper feeding rubber roller are arranged on the paper taking roller bracket, and the secondary reverse paper feeding pressure roller is arranged on the paper taking roller bracket;
the primary paper feeding pressure roller is arranged on a paper feeding channel frame, and the paper feeding channel frame is connected with the paper taking roller bracket;
the secondary paper feeding rubber roll, the secondary paper feeding pressure roll and the transfer roll are arranged on the printing paper path bracket;
the heating roller, the fixing rubber roller, the primary paper outlet rubber roller and the primary paper outlet pressure roller are all arranged on the fixing unit;
the secondary paper outlet rubber roll and the secondary paper outlet pressure roll are arranged on the secondary paper outlet roll bracket;
the back paper path bracket is arranged on the double-sided paper path bracket and is used for supporting and limiting the paper to be transmitted to the image fixing component by the imaging transfer printing component;
the paper taking roller support, the paper feeding channel frame, the printing paper path support, the rear paper path support, the fixing unit, the secondary paper outlet roller support and the double-sided paper path support are matched to form a main paper path.
10. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 9, wherein: the complete machine main frame comprises: the left support, the right support, set up in LSU support of complete machine main frame top and set up in the machine bottom support of complete machine main frame below.
11. An automatic duplex printing mechanism for ensuring reverse skew rate as claimed in claim 10, wherein: the main paper path is arranged between the left bracket and the right bracket;
the photosensitive drum is arranged above the main paper path between the left support and the right support.
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| CN202111063091.XA CN113682059A (en) | 2021-09-10 | 2021-09-10 | Automatic double-sided printing mechanism capable of guaranteeing reverse side skew rate |
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| CN202111063091.XA CN113682059A (en) | 2021-09-10 | 2021-09-10 | Automatic double-sided printing mechanism capable of guaranteeing reverse side skew rate |
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