阅读说明：本技术 便于印版安装和调整的印刷机以及印版固定、纠偏方法 (Printing machine convenient for installing and adjusting printing plate and printing plate fixing and correcting method ) 是由 朱耀中 于 2021-07-16 设计创作，主要内容包括：本发明公开了一种便于印版安装和调整的印刷机以及印版固定、纠偏方法,该印刷机的印刷辊上设置有印刷固定装置,印版固定装置包括连接轴、粗调锁紧组件以及微调锁紧组件,连接轴与印刷辊可转动地连接,连接轴包括内轴、第一轴段与第二轴段,第一轴段与第二轴段均套设于内轴上,并通过一连接杆实现同步的连接。在印版安装固定时,在微调前,可通过粗调锁紧组件对印版进行初步的调整固定,微调时,再通过微调锁紧组件进行精确调整,从而实现印版的快速安装和精确调整,更加适用于实际生产需要。(The invention discloses a printing machine convenient for installing and adjusting a printing plate and a printing plate fixing and deviation rectifying method. When the printing plate is installed and fixed, before fine adjustment, the printing plate can be adjusted and fixed preliminarily through the coarse adjustment locking assembly, and during fine adjustment, the printing plate can be adjusted accurately through the fine adjustment locking assembly, so that quick installation and accurate adjustment of the printing plate are achieved, and the printing plate adjusting device is more suitable for actual production needs.)

1. A printing machine for facilitating the mounting and adjustment of printing plates, comprising a printing unit (2) provided with a plate holding device for holding a printing plate (7) on a printing roller (202) of the printing unit (2), characterized in that the plate holding device comprises:

the printing roller comprises a connecting shaft (601), the connecting shaft (601) comprises an inner shaft (9), a first shaft section (6011) and a second shaft section (6012), the inner shaft (9) is rotatably connected with the printing roller (202), the first shaft section (6011) and the second shaft section (6012) are sleeved on the inner shaft (9) and can rotate relative to the inner shaft (9), and the first shaft section (6011) and the second shaft section (6012) are connected with the end part of the printing plate (7);

the coarse adjustment locking assemblies (10) are respectively and correspondingly arranged in a group corresponding to two ends of the inner shaft (9); and

the fine adjustment locking assemblies (602) are respectively arranged in a group corresponding to the first shaft section (6011) and the second shaft section (6012);

the connecting structure comprises a first shaft section (6011) and a second shaft section (6012), wherein a connecting through hole is arranged in the first shaft section (6011) or the second shaft section (6012) in a penetrating mode, a connecting rod (8) penetrates through the connecting through hole in an axial sliding mode, a connecting groove is arranged on the end portion, corresponding to the connecting rod (8), of the second shaft section (6012) or the first shaft section (6011), and the connecting rod (8) can be inserted into the connecting groove to enable the first shaft section (6011) and the second shaft section (6012) to rotate synchronously.

2. A printing machine according to claim 1, wherein: the fine adjustment locking assembly (602) comprises a fine adjustment ratchet wheel (6021), a fine adjustment pawl (6022) and a first elastic piece (6023), wherein the fine adjustment ratchet wheel (6021) is fixed with the corresponding first shaft section (6011) or the second shaft section (6012), one end of the fine adjustment pawl (6022) is rotatably connected with the printing roller (202), the fine adjustment pawl (6022) is meshed with the fine adjustment pawl (6022), the first elastic piece (6023) is connected with the printing roller (202), and an elastic force is applied to the fine adjustment pawl (6022) to enable the fine adjustment pawl (6022) to abut against the surface of the fine adjustment ratchet wheel (6021).

3. A printing machine according to claim 1, wherein: the coarse adjustment locking assembly (10) comprises a coarse adjustment ratchet wheel (1001), a coarse adjustment pawl (1002) and a second elastic piece (1003), the coarse adjustment ratchet wheel (1001) is fixed with the inner shaft (9), one end of the coarse adjustment pawl (1002) is rotatably connected with the printing roller (202), the coarse adjustment ratchet wheel (1001) is meshed with the coarse adjustment pawl (1002), and the second elastic piece (1003) is connected with the printing roller (202) and exerts elastic force on the coarse adjustment pawl (1002) to enable the coarse adjustment pawl (1002) to be abutted against the surface of the coarse adjustment ratchet wheel (1001).

4. A printing machine according to claim 1, wherein: the printing plate fixing device is characterized in that clamping grooves for connecting the ends of the printing plate (7) are formed in the first shaft section (6011) and the second shaft section (6012), the first shaft section (6011) and the second shaft section (6012) are further connected with resetting pieces, and the resetting pieces can drive the first shaft section (6011) and the second shaft section (6012) to be twisted so that the clamping grooves can be reset.

5. A printing machine according to claim 1, wherein: the fine adjustment locking assembly (602) comprises a fine adjustment worm and a fine adjustment worm wheel, the fine adjustment worm wheel is connected with the corresponding first shaft section (6011) or the second shaft section (6012), the fine adjustment worm is rotatably connected with the printing roller (202), and the fine adjustment worm is meshed with the fine adjustment worm wheel.

6. A printing machine according to claim 1, wherein: the paper feeding device is characterized by further comprising a paper feeding unit (1), a printing unit (2), a slotting unit (3), a die cutting unit (4) and a dust removing device (11), wherein the dust removing device (11) comprises an upper dust collecting component (1101), a lower dust collecting component (1102), a dust discharging branch pipe (1103) and a dust discharging main pipe (1104), the upper dust collecting component (1101) and the lower dust collecting component (1102) are communicated with the dust discharging main pipe (1104) through the dust discharging branch pipe (1103), the upper dust collecting component (1101) is arranged above the paper feeding unit (1), the printing unit (2), the slotting unit (3) and the die cutting unit (4), and the lower dust collecting component (1102) is arranged below the paper feeding unit (1), the printing unit (2), the slotting unit (3) and the die cutting unit (4);

the dust exhaust branch pipe (1103) is also provided with a noise elimination device (12).

7. A method for fixing and rectifying a printing plate is characterized in that: the printing press according to any one of claims 1 to 6, comprising the steps of:

s1: releasing the locking action of the coarse adjustment locking component (10) to enable the inner shaft (9) to freely rotate relative to the printing roller (202);

s2: one end of a printing plate (7) is fixed on the first shaft section (6011) and the second shaft section (6012), and the other end of the printing plate is fixedly connected to the printing roller (202);

s3, rotating the inner shaft (9) to adjust the tension of the printing plate (7), and locking the inner shaft (9) through the rough adjusting and locking assembly (10) after the inner shaft (9) is adjusted to the position, so that the inner shaft (9) is fixed relative to the printing roller (202);

s4: the connecting rod (8) is pulled out of the connecting groove;

s5: releasing the locking function of the fine adjustment locking assembly (602) to enable the first shaft section (6011) and the second shaft section (6012) to freely rotate relative to the inner shaft (9);

s6: rotating the first shaft section (6011) and/or the second shaft section (6012) to adjust the offset of the printing plate (7), and locking the first shaft section (6011) and the second shaft section (6012) through the fine adjustment locking assembly (602) after the offset is adjusted, so that the first shaft section (6011) and the second shaft section (6012) are fixed relative to the inner shaft (9).

Technical Field

The invention relates to the technical field of printing machine equipment, in particular to a printing machine convenient for installing and adjusting a printing plate and a printing plate fixing and deviation rectifying method.

Background

At present, in the printing process of corrugated paper, there are printing devices assembled by a plurality of independent modules, for example: chinese patent application No. 201610507983.7 discloses a corrugated paper printing machine, which comprises a paper feeding unit, a printing unit, a slotting unit, a die cutting unit and a dust removing mechanism, wherein the printing unit is an important working unit, and generally comprises a paper feeding rubber roll, a printing roll and a paper supporting roll, a printing plate is fixed on the printing roll for printing corrugated paper, and the printing plate positioning and fixing accuracy directly affects the printing quality.

At present, in a positioning and fixing scheme for a printing plate, for example, chinese patent application No. 201520732379.5 discloses a locking device for a printing plate of a printing press, which includes a printing roller mechanism and a printing plate, wherein the printing roller mechanism includes a hanging plate shaft and a printing roller, the printing plate is connected with the hanging plate shaft and the printing roller respectively, a pair of locking devices is further provided, the pair of locking devices are respectively installed at two ends of the tightening roller mechanism, the locking devices include a ratchet wheel, a pawl, an a spring, a marble mounting seat and a B spring for supporting the marble, and the installation and replacement of the printing plate are facilitated by the way of the marble.

However, in the actual operation process, the printing plate may be inclined and translated due to installation errors, or the problem of uneven printing tension due to the increase of the printing times may occur.

Although the prior art adopts the ratchet wheel and the pawl mode, the regulation of the printing plate can be realized to a certain extent, but the regulation effect is still not ideal, for example, in the regulation process, the locking devices on two sides need to be synchronously regulated in the same direction, and the regulation needs to be coordinated by multiple persons, so that the regulation is troublesome.

Therefore, it is desirable to provide a printing plate fixing and deviation correcting scheme that is more convenient to install and adjust.

Disclosure of Invention

In order to overcome at least one of the drawbacks of the prior art, the present invention provides a printing press to solve the problem of inconvenient adjustment of the printing plate in the prior art.

The invention also aims to provide a method for fixing and rectifying the printing plate, which solves the problem of inconvenient adjustment of the printing plate in the prior art.

The technical scheme adopted by the invention for solving the problems is as follows:

according to an aspect of an embodiment of the present invention, there is provided a printing plate fixing apparatus for facilitating mounting and adjustment of a printing plate, the printing plate fixing apparatus being provided on a printing roller, including a printing unit on which a printing plate fixing apparatus for fixing a printing plate on the printing roller of the printing unit is provided, the printing plate fixing apparatus including:

the printing roller comprises a printing roller and a connecting shaft, wherein the printing roller is arranged on the printing roller, the connecting shaft comprises an inner shaft, a first shaft section and a second shaft section, the inner shaft is rotatably connected with the printing roller, the first shaft section and the second shaft section are sleeved on the inner shaft and can rotate relative to the inner shaft, and the first shaft section and the second shaft section are connected with the end part of the printing plate;

the coarse adjustment locking assemblies are respectively and correspondingly arranged in a group corresponding to two ends of the inner shaft; and

the fine adjustment locking assemblies are respectively arranged in a group corresponding to the first shaft section and the second shaft section;

the connecting device comprises a first shaft section and a second shaft section, wherein a connecting through hole is penetratingly arranged in the first shaft section or the second shaft section, a connecting rod is axially and slidably arranged in the connecting through hole, a connecting groove is arranged on the end portion, corresponding to the connecting rod, of the second shaft section or the first shaft section, and the connecting rod can be inserted into the connecting groove so that the first shaft section and the second shaft section synchronously rotate.

The invention provides a printing machine, which improves a printing plate fixing device for fixing a printing plate on a printing roller on a printing unit, wherein the structure of a connecting shaft is set to comprise an inner shaft, a first shaft section and a second shaft section, the first shaft section and the second shaft section are both sleeved on the inner shaft and synchronously connected through a connecting rod, when the connecting rod is separated from the connecting groove, the first shaft section and the second shaft section can freely rotate relative to the inner shaft, when the connecting rod is inserted in the connecting groove, the first shaft section and the second shaft section synchronously rotate, therefore, when the printing plate is fixed, the connecting rod is inserted in the connecting groove, the locking function of a coarse adjustment locking component is released, the inner shaft can freely rotate relative to the printing roller, one end of the printing plate is connected with the printing roller, after the other end of the printing plate is connected with the first shaft section and the second shaft section, the position of the inner shaft is preliminarily adjusted, and then the inner shaft is fixed through the coarse adjustment locking component, the connecting groove is pulled out of the connecting rod, the locking effect of the fine adjustment locking assembly is relieved, the first shaft section and the second shaft section can freely rotate relative to the inner shaft, the first shaft section and the second shaft section can be independently adjusted, the tightness of the printing plate can be accurately adjusted, the adjustment is higher in precision and more convenient, the first shaft section and the second shaft section are locked and fixed relative to the inner shaft through the fine adjustment locking assembly after the adjustment is completed, the fixing and more accurate adjustment of the printing plate are realized, and the fine adjustment locking assembly is suitable for actual production needs.

Furthermore, the fine adjustment locking assembly comprises a fine adjustment ratchet wheel, a fine adjustment pawl and a first elastic piece, the fine adjustment ratchet wheel is fixed with the corresponding first shaft section or the second shaft section, one end of the fine adjustment pawl is rotatably connected with the printing roller, the fine adjustment pawl is meshed with the fine adjustment pawl, the first elastic piece is connected with the printing roller and applies elasticity to the fine adjustment pawl, and the fine adjustment pawl is enabled to abut against the surface of the fine adjustment ratchet wheel.

Further, the coarse adjustment locking assembly comprises a coarse adjustment ratchet wheel, a coarse adjustment pawl and a second elastic piece, the coarse adjustment ratchet wheel is fixed with the inner shaft, one end of the coarse adjustment pawl is rotatably connected with the printing roller, the coarse adjustment ratchet wheel is meshed with the coarse adjustment pawl, the second elastic piece is connected with the printing roller and applies elastic force to the coarse adjustment pawl, and the coarse adjustment pawl is enabled to abut against the surface of the coarse adjustment ratchet wheel.

Furthermore, adjusting nuts are fixedly arranged at two end parts of the inner shaft.

Furthermore, the first shaft section and the second shaft section are respectively provided with a clamping groove for connecting the end parts of the printing plate, the first shaft section and the second shaft section are also connected with a resetting piece, and the resetting piece can drive the first shaft section and the second shaft section to twist so as to reset the clamping grooves.

Further, the piece that resets is the torsional spring, torsional spring one end with the printing roller is connected, the other end with first shaft segment, second shaft segment are connected.

As an alternative, the fine adjustment locking assembly comprises a fine adjustment worm and a fine adjustment worm wheel, the fine adjustment worm wheel is connected with the corresponding first shaft section or the second shaft section, the fine adjustment worm is rotatably connected with the printing roller, and the fine adjustment worm is meshed with the fine adjustment worm wheel.

Further, the printing machine comprises a paper feeding unit, a printing unit, a slotting unit, a die cutting unit and a dust removing device, wherein the dust removing device comprises an upper dust suction assembly, a lower dust suction assembly, a dust exhaust branch pipe and a dust exhaust main pipe, the upper dust suction assembly and the lower dust suction assembly are communicated with the dust exhaust main pipe through the dust exhaust branch pipe, the upper dust suction assembly is arranged above the paper feeding unit, the printing unit, the slotting unit and the die cutting unit, and the lower dust suction assembly is arranged below the paper feeding unit, the printing unit, the slotting unit and the die cutting unit;

and the dust exhaust branch pipe is also provided with a silencing device.

In another aspect of the embodiments of the present invention, a method for fixing and correcting a printing plate is provided, which is implemented by any one of the above printing presses, and includes the following steps:

s1: releasing the locking action of the coarse adjustment locking assembly to enable the inner shaft to freely rotate relative to the printing roller;

s2: fixing one end of a printing plate on the first shaft section and the second shaft section, and fixedly connecting the other end of the printing plate on the printing roller;

s3, rotating the inner shaft to adjust the tension of the printing plate, and locking the inner shaft through the coarse adjustment locking component after the inner shaft is adjusted to the position so that the inner shaft is fixed relative to the printing roller;

s4: pulling the connecting rod out of the connecting groove;

s5: the locking function of the fine adjustment locking component is released, so that the first shaft section and the second shaft section can freely rotate relative to the inner shaft;

s6: and rotating the first shaft section and/or the second shaft section to adjust the offset of the printing plate, and locking the first shaft section and the second shaft section through the fine adjustment locking assembly after the first shaft section and/or the second shaft section are adjusted to be in place, so that the first shaft section and the second shaft section are fixed relative to the inner shaft.

According to the technical scheme, the embodiment of the invention at least has the following advantages and positive effects:

1) the printing machine applying the printing plate fixing device is characterized in that the structure of the connecting shaft is set to comprise an inner shaft, a first shaft section and a second shaft section, and a connecting through hole, a connecting groove and a connecting rod are arranged, so that the first shaft section and the second shaft section can synchronously rotate;

2) the reset elastic piece is arranged, after the locking action of the coarse adjustment locking assembly is relieved, the reset elastic piece can enable the clamping grooves on the first shaft section and the second shaft section to be automatically reset to be aligned with the first mounting groove, so that the printing plate is convenient to dismount and mount, the situation that the printing plate can be mounted and dismounted only by rotating the connecting shaft and enabling the clamping grooves to be aligned with the first mounting groove is reduced, and the printing plate is convenient to mount and dismount;

3) in addition, the dust removal device of the printing machine is improved, so that the printing machine has the advantages of good dust removal effect;

4) a printing plate fixing and fixing method is provided, and a printing machine adopting the improved printing plate fixing device realizes quick fixing of a printing plate and quick and accurate adjustment of the printing plate.

Drawings

FIG. 1 is a schematic view of the overall structure of a printing press according to an embodiment of the present invention;

FIG. 2 is a schematic rear view of the printer of FIG. 1;

FIG. 3 is a schematic view of the overall structure of the printing unit of FIG. 1;

FIG. 4 is a schematic top view of a printing roll according to one embodiment of the present invention;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is an exploded view of a trim lock assembly of an embodiment of the present invention without the trim lock assembly shown;

FIG. 8 is an enlarged view of portion B of FIG. 7;

FIG. 9 is a schematic view of a connection structure of the first shaft segment and the second shaft segment according to an embodiment of the present invention;

FIG. 10 is a schematic side view of a printing roll according to an embodiment of the present invention;

fig. 11 is an enlarged view of a portion C in fig. 10.

Wherein the reference numerals have the following meanings:

1. a paper feeding unit; 2. a printing unit; 201. carrying paper rollers; 202. a printing roller; 2021. a first mounting groove; 2022. a second mounting groove; 2023. a groove; 2024. a vent channel; 3. a slotting unit; 4. a die cutting unit; 5. a paperboard; 6. a plate holding device; 601. a connecting shaft; 6011. a first shaft section; 60111. a boss portion; 6012. a second shaft section; 602. fine-tuning the locking assembly; 6021. finely adjusting the ratchet wheel; 6022. fine tuning the pawl; 6023. a first elastic member; 7. printing plate; 8. a connecting rod; 9. an inner shaft; 10. coarse adjustment of the locking assembly; 1001. roughly adjusting the ratchet wheel; 1002. a pawl is coarsely adjusted; 1003. a second elastic member; 11. a dust removal device; 1101. an upper dust collection assembly; 11011. a dust collection fan; 11012. a dust hood; 1102. a lower dust collection assembly; 1103. a dust exhaust branch pipe; 1104. a dust exhaust main pipe; 12. a muffler device; 1201. an anechoic cylinder.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Referring to fig. 1 to 11, the invention discloses a printing machine convenient for installing and adjusting a printing plate, which comprises a paper feeding unit 1, a printing unit 2, a slotting unit 3 and a die cutting unit 4, wherein the printing unit 2 comprises a conveying roller (not shown), a paper supporting roller 201 and a printing roller 202, a paper plate 5 is arranged between the paper supporting roller 201 and the printing roller 202, the printing roller 202 is provided with a printing plate fixing device for fixing the printing plate 7 on the printing roller 202, and the printing plate fixing device comprises a connecting shaft 601, a fine adjustment locking assembly 602 and a coarse adjustment locking assembly 10.

Referring to fig. 5 and 6, the printing roller 202 is provided with a first mounting groove 2021 and a second mounting groove 2022, the first mounting groove 2021 and the second mounting groove 2022 are both provided along the axial direction of the printing roller 202, the printing plate 7 is disposed along the surface of the printing roller 202, and two ends of the printing plate are respectively connected and fixed to the first mounting groove 2021 and the second mounting groove 2022.

The connecting shaft 601 is rotatably connected with the printing roller 202 and is located in the first mounting groove 2021, wherein the connecting shaft 601 includes an inner shaft 9, a first shaft section 6011 and a second shaft section 6012, the first shaft section 6011 and the second shaft section 6012 are both sleeved on the inner shaft 9 and can rotate relative to the inner shaft 9, the inner shaft 9 is rotatably connected with the printing roller 202, and the first shaft section 6011 and the second shaft section 6012 are both connected with an end of the printing plate 7.

The coarse adjustment locking assemblies 10 are arranged in two groups, and the two groups of coarse adjustment locking assemblies are respectively arranged corresponding to two ends of the inner shaft 9.

The fine tuning locking assemblies 602 are respectively arranged in a group corresponding to the first shaft section 6011 and the second shaft section 6012.

Thus, when the printing plate 7 is installed and fixed, the printing plate 7 can be preliminarily adjusted and fixed through the rough adjusting and locking assembly 10 before fine adjustment;

during fine adjustment, fine adjustment is carried out through the fine adjustment locking assembly 602, so that quick installation and fine adjustment of the printing plate 7 are realized, and the printing plate fine adjustment device is more suitable for actual production needs.

Referring to fig. 9, as a possible embodiment, one end of the first shaft section 6011 may be provided with a protruding portion 60111, an end of the second shaft section 6012 is recessed with a groove 2023 (not shown), and the protruding portion 60111 and the groove 2023 are rotatably engaged, so that the first shaft section 6011 can rotate relative to the second shaft section 6012.

Of course, the same object can be achieved by providing the projection 60111 at the second axial section 6012 and the groove 2023 at the first axial end.

In addition, a third connecting member (not shown in the drawings) may be disposed on the first shaft section 6011 and the second shaft section 6012, and the first shaft section 6011 may be rotated relative to the second shaft section 6012 by connecting the first shaft section 6011, the second shaft section 6012 with the third connecting member.

For example, the third connecting member may be a bearing, and the first shaft section 6011 and the second shaft section 6012 are respectively fixed to an inner ring and an outer ring of the bearing, so that the first shaft section 6011 is rotatable relative to the second shaft section 6012.

For another example, the third connecting member is a polished rod, and the first shaft section 6011 and the second shaft section 6012 are both provided with sliding grooves for the polished rod to rotate and connect, so that the same purpose can be achieved.

Furthermore, other means for connecting two parts and achieving rotation about an axis are also applicable to the solution of the present application in the prior art, as will be apparent to those skilled in the art in light of the above disclosure.

Referring to fig. 10 and 11, further, as a possible implementation manner, in the present embodiment, the fine adjustment locking assembly 602 includes a fine adjustment ratchet gear 6021, a fine adjustment pawl 6022, and a first elastic member 6023, where the fine adjustment ratchet gear 6021 is fixed to the corresponding first shaft segment 6011 or second shaft segment 6012, one end of the fine adjustment pawl 6022 is rotatably connected to the printing roller 202, the fine adjustment pawl 6022 is engaged with the fine adjustment pawl 6022, and the first elastic member 6023 is connected to the printing roller 202 and applies an elastic force to the fine adjustment pawl 6022 to press the fine adjustment pawl 6022 against the surface of the fine adjustment ratchet gear 6021; the rotation angle of the first shaft section 6011 or the second shaft section 6012 can be adjusted by rotating the fine adjustment ratchet 6021 with respect to the fine adjustment pawl 6022, the tension state and the offset cross-over of the printing plate 7 can be adjusted, and the fine adjustment ratchet 6022 abuts against the fine adjustment ratchet 6021, thereby locking and fixing the fine adjustment ratchet 6021.

In other possible embodiments, the fine adjustment locking assembly 602 may further include a fine adjustment worm (not shown), a fine adjustment worm wheel (not shown), the fine adjustment worm wheel is connected to the corresponding first shaft segment 6011 or the second shaft segment 6012, the fine adjustment worm is rotatably connected to the printing roller 202, and the fine adjustment worm is engaged with the fine adjustment worm wheel; through setting up like this, its precision of adjustment is higher to have the function of auto-lock, simple structure.

Referring to fig. 9, in this embodiment, a connection through hole (not shown in the figure) is penetratingly formed in the first shaft section 6011 or the second shaft section 6012, a connection rod 8 is axially slidably disposed in the connection through hole, a connection groove (not shown in the figure) is formed in the second shaft section 6012 or the first shaft section 6011 corresponding to an end of the connection rod 8, and the connection rod 8 can be inserted into the connection groove to enable the first shaft section 6011 and the second shaft section 6012 to rotate synchronously; therefore, during rough adjustment, the connecting rod 8 can be inserted into the connecting groove, when adjustment of the inner shaft 9 is achieved, the first shaft section 6011 and the second shaft section 6012 are adjusted at the same time, a printing plate can be fixed quickly conveniently, after rough adjustment, the connecting rod 8 is pulled out of the connecting groove, the first shaft section 6011 and the second shaft section 6012 rotate freely and relatively, fine adjustment can be performed on the corresponding first shaft section 6011 or second shaft section 6012 through the fine adjustment locking assembly 602, independent adjustment of the first shaft section 6011 and the second shaft section 6012 can be achieved, fine adjustment of the printing plate is achieved, the purpose of accurately adjusting the printing plate can be achieved, the purpose of quickly fixing the printing plate can be achieved, and of course, opposite processes can be achieved while quick fixing of the printing plate, and quick disassembly of the printing plate can also be achieved.

In order to realize the synchronous transmission connection between the first shaft section 6011 and the second shaft section 6012, the cross section of the connecting rod 8 is non-circular, for example, regular or irregular shapes such as triangle, rectangle, ellipse, etc., and the connecting groove is adaptive to the shape of the connecting rod 8, so that the connecting rod 8 can be inserted into the connecting groove, and the first shaft section 6011 and the second shaft section 6012 can move synchronously.

Referring to fig. 10, further, as a preferred embodiment, in this embodiment, coarse locking assembly 10 includes a coarse ratchet wheel 1001, a coarse pawl 1002, and a second elastic member 1003, coarse ratchet wheel 1001 is fixed to inner shaft 9, coarse pawl 1002 is rotatably connected to printing roller 202 at one end, coarse ratchet wheel 1001 engages coarse pawl 1002, second elastic member 1003 is connected to printing roller 202 and exerts an elastic force on coarse pawl 1002 to urge coarse pawl 10021001 against the surface of coarse ratchet wheel 1001.

The fine adjustment pawl 6022 and the first elastic member 6023 are both disposed on the inner shaft 9, wherein one end of the fine adjustment pawl 6022 is rotatably connected to the inner shaft 9, the other end is attached to the surface of the fine adjustment ratchet 6021, one end of the first elastic member 6023 is fixed to the inner shaft 9, and the other end is abutted against the fine adjustment pawl 6022.

Of course, similar to the fine lock assembly 602, the coarse lock assembly 10 may also be provided in a worm gear configuration.

The first elastic member 6023 and the second elastic member 1003 may employ springs.

Further, in a preferred embodiment, in the present embodiment, adjusting nuts are fixedly disposed at both ends of the inner shaft 9, and the adjusting nuts are disposed to facilitate rotation of the inner shaft 9 for adjustment.

Further, as a preferred embodiment, in this embodiment, the first shaft section 6011 and the second shaft section 6012 are both provided with a clamping groove (not shown in the figure) for connecting an end of the printing plate 7, and the first shaft section 6011 and the second shaft section 6012 are further connected with a resetting member (not shown in the figure), and the resetting member can drive the first shaft section 6011 and the second shaft section 6012 to twist so that the clamping groove is aligned with the first mounting groove 2021; through the structure, after the locking function of the fine adjustment locking assembly 602 is released, even when the fine adjustment pawl 6022 is disengaged from the fine adjustment ratchet 6021, the reset piece can drive the first shaft section 6011 and the second shaft section 6012 to rotate, so that the clamping groove is aligned with the first mounting groove 2021 and reset, the printing plate 7 is conveniently fixed in the clamping groove, or the printing plate 7 is detached from the clamping groove, and the assembly is convenient.

Further, as a preferred embodiment, the returning member is a torsion spring, one end of which is connected to the printing roller 202, and the other end of which is connected to the first shaft segment 6011 and the second shaft segment 6012.

In other possible embodiments, as a preferred embodiment, the resetting member may also be a rotary driving member such as a motor, and only needs to be able to drive the first shaft segment 6011 and the second shaft segment 6012 to rotate relative to the printing roller 202.

Of course, in the embodiment with the inner shaft 9, the reset member needs to be disposed corresponding to the inner shaft 9 and the first shaft segment 6011 and the second shaft segment 6012, respectively, so that the reset member can independently drive the three to reset, thereby facilitating the installation and the detachment of the printing plate 7.

In order to improve the adhesion between the printing plate 7 and the printing roller 202, as a preferred embodiment, a negative pressure fixing device (not shown in the figure) is further disposed in the printing roller 202, and the negative pressure fixing device includes negative pressure suction cups (not shown in the figure) and a negative pressure generating device (not shown in the figure), the negative pressure suction cups are uniformly distributed on the surface of the printing roller 202 along the circumferential direction of the printing pipe, the negative pressure generating device is a vacuum pump, the printing roller 202 is coaxially fixed with a vent pipe, the vent pipe is fixed to the rotating shaft of the printing roller 202, and the vent pipe can be connected with a vent valve (not shown in the figure).

Therefore, negative pressure suction force is generated through the vacuum pump, the printing plate is adsorbed and fixed through the negative pressure suction disc, the fixing of the printing plate 7 is assisted, the printing plate can be tightly attached to the printing roller 202, the tensioning of the printing plate 7 can be conveniently adjusted, and the adjusting times are reduced.

Preferably, the vent pipe is arranged through the center of the rotating shaft of the printing roller 202, the negative pressure suction cup is connected with the vent pipe (not shown in the figure) through a connecting air pipe (not shown in the figure), the other end of the vent pipe is connected with a vacuum pump so as to provide negative pressure for the negative pressure suction cup, and the negative pressure suction cup is attached to the printing plate 7 coated on the surface of the printing roller 202 so as to tightly suck and fix the printing plate 7.

Preferably, a groove 2023 for installing the negative pressure suction cup is formed on the surface of the printing roller 202, and a ventilation groove 2024 is further formed in the printing roller 202 along the axial direction thereof, wherein the ventilation groove 2024 is communicated with the groove 2023.

Preferably, both ends of the air groove 2024 are closed, at least one end of the air groove 2024 is connected with an air pipe connector (not shown in the figure) for communicating with a connecting air pipe, and the negative pressure suction cup is fixed in the groove 2023.

Of course, in other possible embodiments, the connecting air tube may also be laid in the air groove 2024, and the negative pressure suction force provided by the negative pressure suction cup can also be realized.

In other possible embodiments, the vacuum chuck can be omitted, and the groove 2023 can directly serve as the vacuum chuck to provide vacuum suction force.

Referring to fig. 1 to 3, as a preferred embodiment, in order to achieve a better dust collection effect in the printing production process, the dust collection device 11 is further included, the dust collection device 11 includes an upper dust collection assembly 1101, a lower dust collection assembly 1102, a dust discharge branch pipe 1103 and a dust discharge main pipe 1104, the upper dust collection assembly 1101 and the lower dust collection assembly 1102 are communicated with the dust discharge main pipe 1104 through the dust discharge branch pipe 1103, the upper dust collection assembly 1101 is disposed above the paper feeding unit 1, the printing unit 2, the slotting unit 3 and the die cutting unit 4, and the lower dust collection assembly 1102 is disposed below the paper feeding unit 1, the printing unit 2, the slotting unit 3 and the die cutting unit 4; the upper and lower dust suction assemblies 1101 and 1102 are provided up and down, respectively, to improve dust suction effect.

The upper and lower dust collection assemblies 1101, 1102 may each include a dust collection fan 11011 and a dust collection cover 11012, the dust collection cover 11012 is communicated with the dust discharge branch pipe 1103, and then collects the dust collection airflow in the dust discharge main pipe 1104 through the dust discharge branch pipe 1103 for centralized processing.

The dust exhaust branch pipe 1103 is further provided with a muffler device 12, noise can be reduced by the arrangement of the muffler device 12, the muffler device 12 can be a muffler cylinder 1201, and muffler cotton (not shown in the figure) is arranged in the muffler cylinder 1201, so that noise is reduced from inside to outside through the muffler cotton.

In conclusion, the printing machine of the invention facilitates the adjustment and installation of the printing plate 7 and enhances the fixing effect by improving the printing unit 2, and the dust removal effect of the printing machine is improved by adding the dust removal device 11.

Example 2

The embodiment provides a method for fixing and correcting a printing plate, which is realized by adopting any one of the printing machines disclosed in the embodiment 1, and comprises the following steps:

s1: releasing the locking action of the coarse adjustment locking assembly 10 to enable the inner shaft 9 to freely rotate relative to the printing roller 202;

specifically, the coarse locking assemblies 10 at both ends of the inner shaft 9 are simultaneously released, so that the coarse pawls 1002 overcome the elastic force of the second elastic member 1003 and disengage from the coarse ratchet 1001, thereby allowing the inner shaft 9 to freely rotate relative to the printing roller 202, and thus allowing the printing plate 7 to be mounted on the first shaft segment 6011 or the second shaft segment 6012.

S2: fixing one end of the printing plate 7 on the first shaft section 6011 and the second shaft section 6012, and fixedly connecting the other end of the printing plate 7 on the printing roller 202; that is, one end of the printing plate 7 is connected to the second mounting groove 2022, and the other end is fixed to the first shaft section 6011 and the second shaft section 6012.

S3, rotating the inner shaft 9 to adjust the tension of the printing plate 7, and locking the inner shaft 9 through the rough adjusting and locking assembly 10 after the tension is adjusted to the proper position, so that the inner shaft 9 is fixed relative to the printing roller 202; this step is to achieve a preliminary fixing of the printing plate 7.

S4: the connecting rod 8 is pulled out of the connecting groove; namely, the synchronous connection between the first shaft section 6011 and the second shaft section 6012 is released, the first shaft section 6011 and the second shaft section 6012 can be independently adjusted, before that, the connecting rod 8 is inserted into the connecting groove, in the course of rough adjustment, the fine adjustment locking assembly 602 is in a locked state, and when the inner shaft 9 is adjusted in a rotating manner, the first shaft section 6011 and the second shaft section 6012 can be synchronously driven to rotate, so that the printing plate 7 can be quickly fixed.

S5: releasing the locking function of the fine adjustment locking assembly 602, so that the first shaft section 6011 and the second shaft section 6012 can freely rotate relative to the inner shaft 9; even if the fine adjustment pawl 6022 overcomes the elastic force of the first elastic member 6023 and disengages from the fine adjustment ratchet 6021, the first shaft segment 6011 and the second shaft segment 6012 can rotate freely relative to the inner shaft 9.

S6: rotating the first shaft section 6011 and/or the second shaft section 6012 to adjust the offset of the printing plate 7, and after the offset is adjusted to a certain position, locking the first shaft section 6011 and the second shaft section 6012 by a fine adjustment locking assembly 602 to fix the first shaft section 6011 and the second shaft section 6012 relative to the inner shaft 9; in this step, only the first shaft section 6011 or the second shaft section 6012 may be adjusted, or the first shaft section 6011 and the second shaft section 6012 may be adjusted at the same time, and the printing plate 7 is adjusted according to the actual requirement, so that the printing plate 7 is aligned with the mark line (not marked in the figure) of the printing roller and the tension degree is moderate.

Of course, when the above fixing and correction adjustment process is an actual production condition that requires correction adjustment for the case where the printing plate 7 is not fixed to the printing roller 202 and for the case where the printing plate 7 is already fixed to the printing roller 202, only the above steps S5 and S6 need to be performed.

Further, the process of removing the printing plate 7 using the printing press of example 1 was:

releasing the locking action of the rough adjusting locking assembly 10 and the fine adjusting locking assembly 602, so that the first shaft section 6011 and the second shaft section 6012 can freely rotate relative to the inner shaft 9, and the inner shaft 9 can rotate relative to the printing roller 202; thereby the piece that resets can drive interior axle 9, first shaft section 6011, second shaft section 6012 and rotate draw-in groove and first mounting groove 2021 that make on first shaft section 6011 and the second shaft section 6012 and align, realize resetting of draw-in groove to can take out the cardboard from the draw-in groove, close the breather valve, thereby can dismantle printing plate 7 from printing roller 202, realize the quick dismantlement of printing plate 7 from this.

After the clamping groove is reset, the connecting rod 8 can be inserted into the connecting groove to reset.

In conclusion, the method for fixing and correcting the printing plate 7 can quickly fix and accurately adjust the printing plate 7 and can also realize quick disassembly of the printing plate 7.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.