CN107097515B - Front guide of sheet-fed offset press and sheet-fed offset press - Google Patents
Front guide of sheet-fed offset press and sheet-fed offset press Download PDFInfo
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- CN107097515B CN107097515B CN201710312207.6A CN201710312207A CN107097515B CN 107097515 B CN107097515 B CN 107097515B CN 201710312207 A CN201710312207 A CN 201710312207A CN 107097515 B CN107097515 B CN 107097515B
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- swing rod
- shaft
- driving
- sheet
- front guide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/12—Adjusting leading edges, e.g. front stops
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- Registering Or Overturning Sheets (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
The invention provides a front gauge of a sheet-fed offset press, which comprises a paper blocking block, a connecting rod, a short swing rod of the front gauge, a swing rod shaft, a pin shaft, a driving swing rod and a driving shaft, wherein the paper blocking block is arranged on the front gauge; the paper blocking block is fixedly arranged at the end part of the connecting rod, the other end of the connecting rod is movably connected with the driving swing rod through a pin shaft, the driving swing rod is fixedly arranged on the driving shaft, the front gauge short swing rod and the connecting rod are movably arranged on a swing rod shaft, and the front gauge short swing rod, the connecting rod and the driving swing rod are sequentially connected to form a four-bar mechanism. The four-bar mechanism is adopted for connection, so that the vibration problem caused by fixing the spring is avoided, the accuracy, reliability and stability of the front gauge positioning are improved, and the adjustment is more convenient.
Description
Technical Field
The invention relates to the field of printing equipment, in particular to a front guide of a single-sheet offset press and the single-sheet offset press.
Background
The front gauge is an indispensable mechanical part in the printing machine, and has the function of accurately positioning the paper at the upper position and the lower position of the edge of a jaw in the printing process, so that each paper can keep the same position and the same angle to stop, and then the front gauge is separated to feed the paper into the printing part.
The front gauge is divided into an upper swing type and a lower swing type according to the difference of the structure and the operation direction of the front gauge. The structure of the upper swing type front gauge causes that the time for positioning paper in the running process is relatively long, so that the upper swing type front gauge cannot meet the requirement of the positioning speed of the front gauge in high-speed printing.
As shown in FIGS. 1 and 2, the conventional downswing type front gauge, such as Heidelberg, which is a popular domestic use
The front guide adopted in the speedcaster CD-102 series printing machine always has the problems of low positioning precision, large vibration impact, inconvenient adjustment of the height and the inclination angle of the front guide and the like in a high-speed printing state due to the curve of a driving cam of the front guide, the design of a transmission structure, the structural parameters of the front guide and the like, and has adverse effects on the printing quality and the service life of equipment.
Disclosure of Invention
The invention provides a front guide of a single-sheet offset press and the single-sheet offset press in order to overcome the defects of the prior art.
In order to achieve the purpose, the invention provides a front gauge of a sheet-fed offset press, which comprises a paper blocking block, a connecting rod, a front gauge short swing rod, a swing rod shaft, a pin shaft, a driving swing rod and a driving shaft, wherein the paper blocking block is arranged on the front gauge short swing rod; the paper blocking block is fixedly installed at the end of the connecting rod, the other end of the connecting rod is movably connected with the driving swing rod through a pin shaft, the driving swing rod is fixedly installed on the driving shaft, the front gauge short swing rod and the connecting rod are movably installed on a swing rod shaft, and the front gauge short swing rod, the connecting rod and the driving swing rod are sequentially connected to form the four-bar mechanism.
The four-bar linkage mechanism does not need to use a spring or the like structure to keep the parts fixed and contacted like the traditional front rule mechanism. The structure has the advantages of fewer parts, more flexibility during operation, more convenience for lubrication and maintenance, lower abrasion and longer service life. Meanwhile, the structure is simplified, the space is enlarged, and the interference of the front gauge structure and the gripper mechanism on the structural space can be skillfully avoided. The contact between the link mechanisms is maintained by the self closed geometric shape, and because the link mechanisms are all rigid structures, the problem of elastic vibration possibly occurring in a spring structure is avoided, the accuracy of front gauge positioning and distance yielding can be ensured, the vibration and impact generated by rapid periodic motion of the front gauge mechanisms in high-speed printing are effectively reduced, and the paper positioning requirement in high-speed printing can be better met. The power of the driving shaft comes from a cam structure fixedly connected to the end part of the driving shaft, and the cam swing rod drive the driving shaft to swing in a reciprocating mode and transmit the power to the connecting rod and the paper blocking block, so that the periodic paper blocking and separation of the front gauge are achieved.
In an embodiment of the present invention, the present invention further includes a stopping driving member, a supporting shaft, a stopping arm and a stopping swing rod; the stop swing rod is fixedly connected with the driving shaft and swings along with the driving shaft; the stopping arm is movably arranged on the supporting shaft, the stopping driving piece is connected with the stopping arm, and the stopping driving piece can drive the stopping arm to rotate around the supporting shaft; the rotation track of the stop arm is overlapped with the swing track of the stop swing rod.
The front compass is driven by a four-bar mechanism, has a simple structure, is very huge because a printing machine is usually used, and takes time for completely starting and stopping the equipment, so that the paper is interrupted in the printing process, and the work of the printing machine can be quickly and effectively stopped. The paper is stopped from the driving end of the front gauge structure, the front gauge is stopped to leave, the paper is blocked by the front gauge and cannot be conveyed into printing equipment continuously, and the paper feeding device is simple in structure, easy to operate and good in use stability.
In an embodiment of the present invention, the stopping driving member is an air cylinder.
When the front gauge runs at a high speed, the brake arm suddenly rotates to clamp the automatic swing rod, so that large impact force is easily generated to impact the stop component. When the cylinder is subjected to larger stress, the air volume in the cylinder can be compressed, a certain buffering effect is achieved, and damage to equipment in the stopping process is reduced.
In an embodiment of the invention, the swing arm mechanism further comprises a height adjusting assembly, the swing arm shaft is further provided with an eccentric sleeve, the eccentric sleeve is fixedly connected with the swing arm shaft, the front gauge short swing rod and the connecting rod are movably arranged on the eccentric sleeve, and the end part of the swing arm shaft is in transmission connection with the height adjusting assembly.
Because the front gauge is not provided with a spring structure, the rod and the shaft are rigidly connected and are in a separated structure relative to the wall plate of the offset press, and the position of the whole front gauge structure can be adjusted by adjusting the swing rod shaft which plays a supporting role in the front gauge. The characteristic that the distance between the circumferential surface of the eccentric sleeve and the sleeve center is fluctuated is utilized to realize that the adjustment of the front gauge structure can be more direct and accurate, and the improvement of the positioning precision of the equipment is facilitated.
In an embodiment of the present invention, the height adjusting assembly includes a front gauge height adjusting screw and a swing rod shaft gear, the swing rod shaft gear is fixedly mounted on the swing rod shaft, and the swing rod shaft gear and the front gauge height adjusting screw are in threaded engagement for transmission.
The positioning accuracy requirement of the front gauge of the printing machine is quite high, the amplitude during adjustment is not too large, and a structure of meshing a screw and a gear is adopted, so that on one hand, according to the moment balance principle, although the parts of the equipment are quite heavy, the adjustment can be performed only by using a small force; on the other hand, even if the front gauge height adjusting screw rotates by a large amplitude, the driven swing rod shaft gear only rotates by a small amplitude, the adjustment amplitude of the swing rod shaft is very slow, and the adjustment precision can be effectively improved.
In an embodiment of the present invention, the present invention further comprises a tilt adjusting assembly, the tilt adjusting assembly comprises an eccentric bearing seat, and one end of the driving shaft is movably installed in the eccentric bearing seat.
In an embodiment of the present invention, the inclination adjusting assembly further includes a front gauge inclination adjusting screw and a transmission gear, the transmission gear is disposed between the eccentric bearing seat and the front gauge inclination adjusting screw, a thread on the front gauge inclination adjusting screw is engaged with the transmission gear, and the transmission gear drives the eccentric bearing seat to rotate.
The eccentric sleeve is arranged on the swing rod shaft, and the fluctuation of the supporting surface is uniform when the swing rod shaft rotates, so that the height of the front gauge can be adjusted; and only one end of the driving shaft is arranged in the eccentric bearing seat, so that when the eccentric bearing seat rotates, one end of the driving shaft is displaced, and the other end of the driving shaft is fixed, so that the driving shaft is inclined relative to the original position.
In an embodiment of the present invention, the paper stopper is provided with a roller.
In the traditional front gauge, the end part of the paper blocking block is designed into an upturned paper guide plate to guide paper to be smoothly fed below the paper blocking block of the front gauge, so that compaction and positioning are facilitated. The paper guide plate at the end part of the paper blocking block is changed into the roller, so that the paper can play a guiding role when being conveyed, but the sliding friction of the paper is changed into rolling friction, so that the resistance of the paper in the conveying process is reduced, the paper is ensured to have enough kinetic energy to reach the edge of the front gauge, and the positioning accuracy is increased.
The invention also provides a front guide of the single-sheet offset press, which comprises the front guide of the single-sheet offset press.
Drawings
FIG. 1 is a schematic diagram of the Heidelberg speedcaster CD-102 series press front guide.
FIG. 2 is a schematic diagram of the operating principle of the Heidelberg Speedaster CD-102 series press front guide.
FIG. 3 is a schematic top view of the front guide of the sheet-fed offset printing press according to the present invention.
Fig. 4 is an enlarged schematic view of a portion a in fig. 3.
FIG. 5 is a left side view schematic diagram of the front guide of the sheet-fed offset printing press according to the present invention, and the height adjustment structure and the tilt adjustment structure thereof.
Fig. 6 is an enlarged schematic view of a portion D in fig. 5.
Fig. 7 is an enlarged schematic view of a portion B in fig. 3.
Fig. 8 is an enlarged schematic view of portion C of fig. 3.
FIG. 9 is a left side view schematic diagram of a stop structure of a front guide of a sheet-fed offset printing press according to the present invention.
The figures are numbered:
1. a paper blocking block; 12. a roller; 2. a connecting rod; 21. a swing rod shaft; 22. a pin shaft; 3. a front gauge short swing rod; 41. driving the swing rod; 42. a drive shaft; 51. stopping the driving piece; 52. a support shaft; 53. a stopper arm; 54. stopping the swing rod; 61. an eccentric sleeve; 62. a front gauge height adjusting screw; 63. a swing link shaft gear; 71. an eccentric bearing seat; 72. a front gauge inclination adjusting screw rod; 73. a transmission gear.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Referring to fig. 3, 4 and 5, the present invention provides a front guide of a sheet-fed offset printing press, including a paper blocking block 1, a connecting rod 2, a short swing link 3 of the front guide, a swing link shaft 21, a pin 22, a driving swing link 41 and a driving shaft 42; the paper blocking block 1 is fixedly arranged at the end part of the connecting rod 2, the other end of the connecting rod 2 is movably connected with a driving swing rod 41 through a pin shaft 22, the driving swing rod 41 is fixedly arranged on a driving shaft 42, the front gauge short swing rod 3 and the connecting rod 2 are movably arranged on a swing rod shaft 21, and the front gauge short swing rod 3, the connecting rod 2 and the driving swing rod 41 are sequentially connected to form a four-bar mechanism.
The front gauge short swing rod 3, the connecting rod 2 and the driving swing rod 41 are sequentially connected to form a four-bar mechanism, and the traditional front gauge mechanism does not need to use a spring and other structures to keep the parts fixed and contacted. The structure has the advantages of fewer parts, more flexible operation and more convenient lubrication and maintenance, so that the abrasion is slow and the service life is long. Meanwhile, the structure is simplified, the space is enlarged, and the interference of the front gauge structure and the gripper mechanism on the structural space can be skillfully avoided. The contact between the link mechanisms is maintained by the closed geometric shape of the link mechanisms, and because the link mechanisms are all rigid structures, the problem of elastic vibration possibly occurring in a spring structure is solved, the accuracy of front gauge positioning and yielding can be ensured, the vibration and impact generated by rapid periodic motion of the front gauge mechanisms in high-speed printing are effectively reduced, and the paper positioning requirement in high-speed printing can be better met. The power of the driving shaft 42 comes from a cam structure fixedly connected to the end of the driving shaft, and the cam and a cam swing rod drive the driving shaft to swing in a reciprocating manner and transmit the power to the connecting rod and the paper blocking block, so that the periodic paper blocking and separation of the front gauge are realized.
Referring to fig. 3, 8 and 9, as an embodiment, the present invention further includes a stop driving member 51, a supporting shaft 52, a stop arm 53 and a stop lever 54; the stop swing rod 54 is fixedly connected with the driving shaft 42 and swings along with the driving shaft 42; the stopping arm 53 is movably arranged on the supporting shaft 52, the stopping driving piece 51 is connected with the stopping arm 53, and the stopping driving piece 51 can drive the stopping arm 53 to rotate around the supporting shaft 52; the rotation track of the stop arm 53 and the swing track of the stop swing link 54 overlap each other.
The front compass is driven by a four-bar mechanism, has simple and reliable structure, and can quickly and effectively stop the operation of the printing machine in the printing process by interrupting the conveying of paper because a printing machine is usually huge and the complete start and stop of the equipment takes time. The paper is stopped from the driving end of the front gauge structure, the front gauge is stopped to be separated, the paper is blocked by the front gauge and cannot be conveyed into the printing equipment continuously, and the paper feeding device is simple in structure, easy to operate and good in use stability.
As an example, the stop driving member 51 is a cylinder.
As shown in fig. 9, when the front gauge is operated at a high speed, the brake arm 53 suddenly turns into a motion of catching the stopper swing lever 54, and a large impact force is easily generated to impact the stopper member. When the cylinder is subjected to larger stress, the air volume in the cylinder can be compressed, a certain buffering effect is achieved, and damage to equipment in the stopping process is reduced.
Referring to fig. 3 and 4, as an embodiment, the present invention further includes a height adjusting assembly, the swing rod shaft 21 is further provided with an eccentric sleeve 61, the eccentric sleeve 61 is fixedly connected with the swing rod shaft 21, the front short swing rod 3 and the connecting rod 2 are movably mounted on the eccentric sleeve 61, and an end of the swing rod shaft 21 is in transmission connection with the height adjusting assembly.
Because the front gauge is not provided with a spring structure, the rod and the shaft are rigidly connected and are in a separated structure relative to the wall plate of the offset press, and the position of the whole front gauge structure can be adjusted by adjusting the swing rod shaft which plays a supporting role in the front gauge. The characteristic that the distance between the circumferential surface of the eccentric sleeve and the sleeve center is fluctuated is utilized to realize that the adjustment of the front gauge structure can be more direct and accurate, and the improvement of the positioning precision of the equipment is facilitated.
Referring to fig. 3, 4 and 5, as an embodiment, the height adjusting assembly includes a front gauge height adjusting screw 62 and a rocker shaft gear 63, the rocker shaft gear 63 is fixedly mounted on the rocker shaft 21, and the rocker shaft gear 63 and the front gauge height adjusting screw 62 are in threaded engagement for transmission.
The positioning accuracy requirement of the front gauge of the printing machine is quite high, the amplitude during adjustment is not too large, and a structure of meshing a screw and a gear is adopted, so that on one hand, according to the moment balance principle, although the parts of the equipment are quite heavy, the adjustment can be performed only by using a small force; on the other hand, even if the front gauge height adjusting screw 62 rotates by a large amplitude, the driven swing rod shaft gear 63 only rotates by a small amplitude, the adjusting amplitude of the swing rod shaft 21 is very slow, and the adjusting precision can be effectively improved.
Referring to fig. 3 and 7, as an embodiment, the present invention further includes a tilt adjusting assembly, which includes an eccentric bearing seat 71, and one end of the driving shaft 42 is movably installed in the eccentric bearing seat 71.
In one embodiment, the tilt adjusting assembly further includes a front tilt adjusting screw 72 and a transmission gear 73, the transmission gear 73 is disposed between the eccentric bearing seat 71 and the front tilt adjusting screw 72, and a thread on the front tilt adjusting screw 72 is engaged with the transmission gear 73 to rotate the eccentric bearing seat 71 through the transmission gear 73.
An eccentric sleeve 61 is arranged on the swing rod shaft 21, and the fluctuation of the supporting surface is uniform when the swing rod shaft 21 rotates, so that the height of a front gauge can be adjusted; since only one end of the driving shaft 42 is disposed in the eccentric bearing housing 71, when the eccentric bearing housing 71 rotates, one end of the driving shaft 42 is displaced, and the other end is fixed, so that the driving shaft 42 is inclined with respect to the original position, because of the separated configuration of the front gauge, the position of the entire front gauge structure can be adjusted by adjusting the swing lever shaft 21 supporting therein.
Referring to fig. 5 and 6, as an embodiment, a roller 12 is disposed on the paper blocking block 1.
In the traditional front gauge, the end part of a paper blocking block 1 is designed into an upward warped paper guide plate to guide paper to be smoothly conveyed to the position below the paper blocking block of the front gauge, so that compaction and positioning are facilitated. The paper guide plate at the end part of the paper blocking block 1 is changed into the roller 12, which can play a guiding role when paper is conveyed, but the sliding friction of the paper is changed into rolling friction, so that the resistance of the paper in the conveying process is reduced, the paper is ensured to have enough kinetic energy to reach the edge of a front gauge, and the positioning accuracy is increased.
The invention also provides a front guide of the single-sheet offset press, which comprises the front guide of the single-sheet offset press.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (7)
1. A front gauge of a sheet-fed offset press comprises a paper blocking block, a connecting rod, a front gauge short swing rod, a swing rod shaft, a pin shaft, a driving swing rod and a driving shaft; the paper blocking block is fixedly arranged at the end part of the connecting rod, the other end of the connecting rod is movably connected with the driving swing rod through a pin shaft, the driving swing rod is fixedly arranged on the driving shaft, the front gauge short swing rod and the connecting rod are movably arranged on a swing rod shaft, and the front gauge short swing rod, the connecting rod and the driving swing rod are sequentially connected to form a four-bar mechanism; the stop swing rod is fixedly connected with the driving shaft and swings along with the driving shaft; the stopping driving piece can drive the stopping arm to rotate around the supporting shaft; the rotation track of the stop arm is overlapped with the swing track of the stop swing rod, and the paper blocking block is provided with a roller.
2. The sheet-fed offset printing press front guide as recited in claim 1, wherein said stop driving member is an air cylinder.
3. The front guide for a sheet-fed offset printing press according to claim 1, further comprising a height adjustment assembly, wherein the swing rod shaft is further provided with an eccentric sleeve, the eccentric sleeve is fixedly connected with the swing rod shaft, the short swing rod of the front guide and the connecting rod are movably mounted on the eccentric sleeve, and the end part of the swing rod shaft is in transmission connection with the height adjustment assembly.
4. The front guide of a sheet-fed offset printing press as set forth in claim 3, wherein the height adjustment assembly includes a front guide height adjustment screw and a rocker shaft gear fixedly mounted on the rocker shaft, the rocker shaft gear being in meshing engagement with threads on the front guide height adjustment screw.
5. The sheet-fed offset printing press front gauge according to claim 1, further comprising a tilt adjustment assembly, said tilt adjustment assembly comprising an eccentric bearing housing, one end of said drive shaft being movably mounted in said eccentric bearing housing.
6. The front guide of a sheet-fed offset printing press according to claim 5, wherein the tilt adjusting assembly further comprises a front guide tilt adjusting screw and a transmission gear, the transmission gear is disposed between the eccentric bearing seat and the front guide tilt adjusting screw, and a thread on the front guide tilt adjusting screw is engaged with the transmission gear, and the transmission gear drives the eccentric bearing seat to rotate.
7. A sheet-fed offset printing press comprising the sheet-fed offset printing press front guide of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312207.6A CN107097515B (en) | 2017-05-05 | 2017-05-05 | Front guide of sheet-fed offset press and sheet-fed offset press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312207.6A CN107097515B (en) | 2017-05-05 | 2017-05-05 | Front guide of sheet-fed offset press and sheet-fed offset press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107097515A CN107097515A (en) | 2017-08-29 |
| CN107097515B true CN107097515B (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710312207.6A Active CN107097515B (en) | 2017-05-05 | 2017-05-05 | Front guide of sheet-fed offset press and sheet-fed offset press |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107757100A (en) * | 2017-11-27 | 2018-03-06 | 东台市康宏纸箱厂 | Pendulum-type front lay in a kind of combination for paper printing |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD148619A1 (en) * | 1980-01-21 | 1981-06-03 | Guenter Weisbach | DEVICE FOR CONTROLLING DRAWING MARKS IN PRINTING MACHINES |
| DE4239255C2 (en) * | 1992-11-21 | 1998-02-12 | Kba Planeta Ag | Device for controlling jetty marks |
| EP1142710B1 (en) * | 2000-04-03 | 2007-11-28 | Heidelberger Druckmaschinen Aktiengesellschaft | Sheet-fed printing machines and method for driving a sheet-fed printing machine |
| CN2825552Y (en) * | 2005-08-29 | 2006-10-11 | 林灿龙 | Paper positioning device |
| DE102009008776B4 (en) * | 2008-03-17 | 2021-05-27 | Heidelberger Druckmaschinen Ag | Device for aligning sheets with stops |
| DE102010054708A1 (en) * | 2010-02-02 | 2011-08-04 | Heidelberger Druckmaschinen AG, 69115 | Deckmark height adjustment device |
| CN201721119U (en) * | 2010-05-20 | 2011-01-26 | 江苏昌昇集团股份有限公司 | Front compass conjugate cam driving mechanism |
| CN202242310U (en) * | 2011-09-19 | 2012-05-30 | 新乡市新机创新机械有限公司 | Front lay control device on printing machine |
| CN103057260B (en) * | 2013-01-09 | 2015-03-25 | 上海大学 | Planet gear connecting rod combined paper feeding device |
| CN103183246B (en) * | 2013-03-29 | 2016-01-13 | 天津长荣印刷设备股份有限公司 | A kind of feeding positioning device for paper and method of work thereof |
| CN203246206U (en) * | 2013-04-27 | 2013-10-23 | 青岛惠运办公科技集团股份有限公司 | Page-turning mechanism |
| CN203726988U (en) * | 2014-02-10 | 2014-07-23 | 浙江锦盛壁纸有限公司 | Sheet-fed printing press downswing type front lay mechanism |
| CN104494300A (en) * | 2014-12-18 | 2015-04-08 | 重庆佐恩家具有限公司 | Wallpaper printing positioning mechanism |
| CN206953786U (en) * | 2017-05-05 | 2018-02-02 | 浙江通得数字印刷设备制造有限公司 | Sheet-fed offset press front lay and sheet-fed offset press |
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2017
- 2017-05-05 CN CN201710312207.6A patent/CN107097515B/en active Active
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Denomination of invention: Front gauge of single sheet offset printing machine and single sheet offset printing machine Effective date of registration: 20230626 Granted publication date: 20230131 Pledgee: Bank of China Limited Zhuji sub branch Pledgor: ZHEJIANG TONGDE DIGITAL PRINTING EQUIPMENT MANUFACTURING CO.,LTD. Registration number: Y2023980045636 |