JP6922223B2 - Printing equipment - Google Patents

Description

The present invention relates to a printing apparatus capable of changing plates without removing the plate cylinder. More specifically, the plate can be easily attached to the plate cylinder and the plate of the fixed portion to the plate cylinder can be easily attached. The present invention relates to a printing apparatus in which protrusion in the radial direction is reduced.

A printing device in which a replaceable printing plate is attached to a plate cylinder that is detachably fixed to a drive shaft has been conventionally known, and when the plate is changed in such a printing device, the plate cylinder is generally used. Is removed from the drive shaft, and a sheet-shaped printing plate is wound and attached, and this is fixed to the drive shaft again.
However, since the plate cylinder is quite heavy, it is hard work to remove it from the drive shaft every time the plate is changed, and the workability is inferior.

In order to solve such a problem, a printing device that enables plate change while the plate cylinder is fixed to the drive shaft has also been proposed. For example, Patent Document 1 below proposes a device for mounting a printing plate provided with engaging ridges at both ends in the length direction of the plate portion on a plate drive shaft of a printing machine. Is a printing plate connecting member that engages with both engaging ridges of the tubular printing plate to connect both ends in the length direction of the tubular printing plate, and a cylinder fixedly provided on the drive shaft. A plate cylinder is provided, and the plate cylinder contains a printing plate connecting member accommodating groove for accommodating a printing plate connecting member connecting a tubular printing plate, a stubber portion for axial positioning of the printing plate connecting member, and a printing plate. A printing plate connecting member guide portion for guiding the connecting member so as to be able to move within a predetermined range in the plate cylinder radial direction and a printing plate connecting member urging device for urging the printing plate connecting member outward in the plate cylinder radial direction are provided. ing.

In the device described in Patent Document 1, the tubular printing plate can be attached and detached while the plate cylinder is fixed to the drive shaft, and when the printing plate is attached, the printing plate connecting member is urged. Since the device is not urged, a gap is formed between the outer peripheral surface of the plate cylinder and the printing plate, which is excellent in terms of plate change workability. In addition, the removed printing plate can be kept in the form of a sheet, which is excellent in that it does not require a large storage space.

International release 2013/171818

In the apparatus described in Patent Document 1, after the printing plate is attached to the plate cylinder, the printing plate connecting member urging device urges the printing plate connecting member outward in the plate cylinder radial direction, whereby the printing plate is printed. Is closely fixed to the outer peripheral surface of the plate cylinder.
However, when the printing plate is urged outward in the radial direction of the plate cylinder, if the printing plate is strongly urged so as to apply sufficient tension, the urging portion may protrude outward in the radial direction of the plate cylinder. On the other hand, if the tension is insufficient, the printing plate cannot be sufficiently adhered and fixed to the outer surface of the plate cylinder, so that there is a problem that it is difficult to adjust the urging conditions.
Further, in the device of Patent Document 1, since one printing plate is formed into a cylinder and mounted on the plate cylinder, it is not possible to mount two printing plates individually, and a plurality of printing plates can be mounted on one plate cylinder. It is desired to print the image surface of the above at high speed.

Therefore, an object of the present invention is that the printing plate can be mounted on the plate cylinder without removing the plate cylinder from the drive shaft, and the printing plate can be urged in the circumferential direction after the printing plate is mounted, and the plate can be mounted from the plate cylinder surface. It is an object of the present invention to provide a printing apparatus capable of efficiently applying tension to a printing plate without the fixing means protruding.

According to the present invention, a printing plate unit comprising a printing plate and a set of connecting members attached to both ends of the printing plate in the longitudinal direction and extending in the width direction of the printing plate that can engage with the surface of the plate cylinder. A printing device including a plate cylinder to which the printing plate unit can be mounted by the connecting member, and a fixing portion that can be engaged with and fixed to one of the connecting members on the plate body surface. An engaging portion that engages with the other of the connecting members and moves in the plate body circumference direction, and an urging means that urges the engaging portion in the plate body circumference direction are provided . A pressing plate capable of pressing the engaging portion in the circumferential direction of the plate cylinder, a first elastic member capable of urging the pressing plate in the circumferential direction of the plate cylinder, and a surface opposite to the surface in contact with the first elastic member. It has a pressing member formed as a tapered surface and movable so as to press the first elastic member, and a tapered surface that is slidable in contact with the tapered surface of the pressing member, and moves inward in the plate barrel axial direction. A slider that moves in the plate cylinder axis direction to move the pressing member in the plate cylinder circumferential direction, and a third that can be restored to the state before being urged when the pressing plate and the fixed portion are brought into contact with each other and the urging state is released. A printing apparatus comprising two elastic members is provided.

In the printing apparatus of the present invention
1 . Connecting member comprising a front Symbol plate cylinder engages the fixed portion, the plate of the composed longitudinal edges from the inner clamping member and the outer clamping member clamped to fix the inner and outer surface, the inner clamping member is a plate cylinder surface The connecting member that is fitted and fixed to the recess formed in the plate and engages with the engaging portion comprises an inner holding member and an outer holding member that sandwich and fix the longitudinal edge of the printing plate from the inner and outer surface sides. The inner holding member engages with the engaging part,
2 . Provided with a fixture for fixing the state in which the slider is moved inward in the plate barrel axial direction.
3 . The pressing plate has rail guides at both ends in the plate barrel axial direction, and the pressing plate moves along a rail attached to the rail guide extending in the plate cylinder circumferential direction.
4 . The engaging portion engages with the engaging convex portion and the engaging concave portion extending in the printing plate width direction formed on the inner holding member of the connecting member, and the engaging convex portion and the engaging concave portion are engaged in the plate barrel axial direction. Have a guide rail to guide you to
Is preferable.

In the printing apparatus of the present invention, the printing plate can be attached to or removed from the plate cylinder without removing the plate cylinder from the drive shaft. When the printing plate is attached to the plate cylinder, the printing plate is mounted on the plate cylinder. There is a gap between the surface of the plate and the surface of the body, and the connecting members provided at both ends of the printing plate of the printing plate unit in the longitudinal direction form the fixing portion and the engaging portion of the plate fixing means of the plate cylinder and the plate cylinder. Since the printing plate unit is inserted while engaging in the circumferential direction and the radial direction, the printing plate unit can be easily and surely attached to the plate cylinder.
Further, in the printing plate unit mounted on the plate cylinder, the printing plate is pulled by the engaging portion moving in the circumferential direction, and the printing plate is in a state of being closely fixed to the plate cylinder surface without a gap.
Further, when the printing plate unit is attached, the plate fixing means projects in the radial direction of the plate cylinder because the loosening of the printing plate is eliminated by the urging means for moving the engaging portion in the circumferential direction of the plate cylinder. It is possible to efficiently apply tension to the printing plate without any trouble during printing.
Furthermore, in the printing apparatus of the present invention, by forming a plurality of plate fixing means, it is possible to mount the printing plate unit on a plurality of plate cylinders, and a plurality of image surfaces can be printed at high speed with one plate cylinder. You can also do it.

It is a side view which shows an example of the printing plate unit used in the printing apparatus of this invention. It is a front view which shows an example of the plate cylinder used in the printing apparatus of this invention. It is a figure which shows the state which the printing plate unit shown in FIG. 1 is attached to the plate cylinder shown in FIG. It is a figure which shows the X-ray cross section of FIG. It is a figure which shows the state which urged the engaging part in the plate body circumferential direction by the urging means. It is a figure which shows the YY line cross section of FIG. It is a figure which shows the state which urged the engaging part in the plate body circumferential direction by the urging means. It is a figure which shows another example of the plate fixing means of this invention.

As described above, the printing apparatus of the present invention has a printing plate unit including a printing plate and connecting members attached to both end edges of the printing plate in the longitudinal direction, and connecting members of the printing plate unit on the surface of the plate cylinder. It consists of a plate cylinder that can be mounted by a fixed portion and an engaging portion provided, and the printing plate is formed by engaging and fixing the fixing portion and the engaging portion provided on the surface of the plate cylinder and the connecting member. It is an important feature that the engaging portion is provided with an urging means capable of moving the engaging portion in the circumferential direction of the plate after being mounted on the plate.
In the present specification, unless otherwise specified, the circumferential direction and the axial direction mean the circumferential direction of the plate cylinder and the axial direction of the plate cylinder with reference to the front view of the plate cylinder.

The printing apparatus of the present invention will be described with reference to the specific examples shown in the accompanying drawings.
FIG. 1 is a side view showing an example of the printing plate unit used in the present invention, and the printing plate unit shown by 1 is mounted on the printing plate 2 and one edge portion in the longitudinal direction of the printing plate 2. It is composed of a connecting member 3 extending in the width direction of the printing plate (in the back direction of the drawing) and a connecting member 4 extending in the width direction of the printing plate attached to the other end edge portion. The connecting member 3 is composed of an inner holding member 3a that supports the printing plate from the plate cylinder side and an outer holding member 3b that supports the printing plate from the outside when the printing plate unit is mounted on the plate cylinder, and the inner connecting member 3a. In addition, an engaging protrusion 31 that engages with the fixing portion of the plate cylinder, which will be described later, in the radial direction and the circumferential direction of the plate cylinder is formed. On the other hand, the connecting member 4 is also composed of an inner holding member 4a that supports the printing plate from the plate cylinder side and an outer holding member 4b that supports the printing plate from the outside when the printing plate unit is mounted on the plate cylinder, which will be described later. An engaging convex portion 41 and an engaging concave portion 42 extending in the printing plate width direction are formed to engage with the guide rail of the engaging portion of the plate cylinder.

As shown in FIG. 2, in the plate cylinder whose whole is indicated by 10, the plate cylinder outer cylinders 11a and 11b divided into two are combined in a cylindrical shape by the hub 12, and the plate cylinder outer cylinder 11a of the hub 12 is combined. , 11b, the plate fixing means represented by 13a and 13b for mounting the printing plate (not shown) on the outer peripheral surface of the plate cylinder is located at a position facing each other via the hub 12 of the plate cylinder outer cylinder 11a. , 11b are integrally formed. Further, the plate cylinder 10 is detachably attached to the drive shaft, and in the specific example shown in the figure, the drive shaft (not shown) has a large diameter on the support portion side and a small diameter toward the free end side. Since the hub 12 has a tapered shape, the bearing portion 12a of the hub 12 is also formed in a tapered shape whose diameter increases toward the back of the drawing.

The plate fixing means 13 engages with the fixing portion 14 that engages with the connecting member 3 of the printing plate unit 1 described above and the connecting member 4 of the printing plate unit 1 described above, and is engaged with the connecting member 4 of the printing plate unit 1 described above. It is composed of an engaging portion 15 that can move in the direction and an urging means 20 that moves the engaging portion 15 in the circumferential direction of the plate. As is clear from FIG. 5A, the fixing portion 14 and the engaging portion 15 have a gap L formed between the opposing side surfaces 14c and 15d in the state before being urged, and only this distance L. The engaging part moves, and it becomes possible to pull the printing plate. That is, since the printing plate unit is longer than the circumferential length of the plate cylinder to be actually mounted at the time of attachment / detachment by the distance L, a gap is formed between the plate cylinder surface and the printing plate. Therefore, it becomes possible to attach and detach it to the plate cylinder with a margin.
Since the fixing portion and the engaging portion engage with the connecting member of the printing plate unit extending in the printing plate width direction in the plate barrel axial direction, it is clear that the fixing portion and the engaging portion extend toward the back of the drawing.
As is clear from FIGS. 2, 3 and 5, the fixing portion 14 is formed with a fitting portion 14a into which the inner holding member 3a of the connecting member 3 can be fitted, and the fitting portion 14a is inside the fitting portion 14a. By fitting the sandwiching member 3a, the inner sandwiching member 3a is fixed in the plate body circumferential direction. Further, the opening of the fitting portion 14a is engaged with the engaging protrusion 31 of the inner holding member 3a in the radial direction of the plate cylinder to guide the insertion of the connecting member 3 into the plate cylinder and to connect the connecting member 3 to the plate cylinder. An engaging projection 14b for fixing to the surface is formed.
On the other hand, as is clear from FIGS. 2, 3 and 5, the engaging portion 15 has a pressing portion 15a and a pressing portion 15a extending radially outward from the plate body center side urged by the urging means described later. A circumferential member 15b that extends in the direction opposite to the urging direction by the urging means and covers the urging means from the outside in the radial direction of the plate body, and is located on the radial side of the plate cylinder from the circumferential member 15b and in the urging direction. It is composed of a guide rail 15c that protrudes in a hook shape in the opposite direction to the above. The guide rail 15c engages with the engaging convex portion 41 and the engaging concave portion 42 formed on the inner holding member 4a of the connecting member 4 of the printing plate unit 1 in the radial direction and the circumferential direction of the plate cylinder, and the connecting member 4 The connecting member 4 can be firmly fixed to the plate cylinder as well as guiding the insertion of the plate into the plate cylinder.
Further, as is clear from FIGS. 4 and 5, the pressing portion 15a is integrally formed with the pressing plate 21 described later in the plate barrel axial direction, and moves in response to the movement of the pressing plate.

The engaging protrusion 31 of the inner sandwiching member 3a of the connecting member 3 of the printing plate unit 1 is attached to the fitting portion 14a of the fixing portion 14, and similarly, the engaging convex portion 41 of the inner sandwiching member 4a of the 1 connecting member 4 of the printing plate unit 1. And the engaging recess 42 is engaged with the guide rail 15c of the engaging portion 15, and the connecting member is inserted in the axial direction of the plate cylinder. As a result, the printing plate unit 1 can be easily attached to the plate cylinder, firmly fixed, and easily removed.
That is, in the fixing portion 14, the engaging protrusion 31 of the inner holding member 3a is engaged and fixed to the engaging protrusion 14b of the fixing portion 14 in the radial direction of the plate cylinder, and the inner holding member 3a is engaged and fixed on the printing plate side (FIG. 5). Even when the right side) receives tension from the printing plate 2 in the circumferential direction, the connecting member 3 is firmly attached to the inner wall of the fitting portion 14a of the fixing portion 14 in the radial direction and the circumferential direction of the plate cylinder. It is fixed. On the other hand, in the engaging portion 15, the engaging convex portion 41 and the engaging concave portion 42 of the inner holding member 4a are fitted with the hook-shaped guide rail 15c of the engaging portion 15, and the connecting members are connected in the radial direction and the circumferential direction of the plate body. 4 is firmly fixed.

As described above, since the printing plate unit 1 is longer than the circumferential length actually required for mounting on the plate cylinder by a distance L, in the printing apparatus of the present invention, it is engaged by the urging means. The printing plate unit is pulled and its length is adjusted by moving the portion in the circumferential direction to a distance of less than L, preferably around L / 2. As a result, the printing plate can be mounted on the plate cylinder surface without loosening without the printing plate protruding outward in the plate cylinder radial direction in the vicinity of the plate fixing means unlike the conventional urging means. ..
As shown in FIGS. 4 and 5, the urging means represented by 20 is a pressing plate 21 formed integrally with the pressing portion 15a of the engaging portion 15 and movable in the circumferential direction of the plate cylinder, and the pressing portion 21. An elastic member 22 (first elastic member) capable of urging the plate 21 in the circumferential direction of the plate cylinder and applying tension to the printing plate at the time of pressing, a surface adjacent to the elastic member 22 and in contact with the elastic member 22. It is composed of a wedge-shaped pressing member 23 whose surface opposite to the tapered surface 23a is formed as a tapered surface 23a, and a slider 24 having a tapered surface 24a inclined at the same inclination angle and in the opposite direction as the tapered surface 23a of the pressing member 23. There is. A gripping member 25 for moving the slider 24 in the axial direction is formed at an end portion of the slider 24 on the outer side in the axial direction of the plate cylinder.
In the specific example shown in the figure, the urged state maintained by the fixture described later can be easily restored to the state before being urged when the fixture is released by removing the fixture. An elastic member 26 (second elastic member) is formed in contact with the plate 21 and the fixing portion 14. Further, in order for the pressing plate 21 to move easily and without deviating from the track, rails 27a and 27b and rail guides 28a and 28b for guiding the rails 27 are formed at both ends of the pressing plate 21 in the plate barrel axial direction. ..

A method of urging the urging means will be described with reference to FIGS. 4 and 5. In FIG. 3, the printing plate unit was mounted only on the plate cylinder on the right half of the drawing, but in FIG. 5, the plate fixing means in the state where the two printing plate units are mounted on the plate cylinder is provided. Shown.
In the state shown in FIG. 4A, a space in which the slider 24 can be completely stored is not formed between the tapered surface 23a of the pressing member 23 and the hub 12, and the gripping member 25 is outside the plate cylinder. However, by pushing the gripping member 25 inward in the plate cylinder axial direction, the tapered surface 24a of the slider 24 slides inward in the plate cylinder axial direction while sliding with the tapered surface 23a of the pressing member 23. Proceed to. By this progress, the slider 24 presses the pressing member 23 in the right side direction (circumferential direction) of FIG. As a result, as shown in FIG. 4B, the pressing member 23 moves in the right direction in the drawing, and the pressing plate 21 is moved in the right direction in the drawing via the elastic member 22.
As is clear from FIG. 5, as the pressing plate 21 moves, the engaging portion 15 also moves in the circumferential direction (clockwise direction, right direction in the figure) of the plate cylinder, thereby moving the printing plate 2b in the circumferential direction (clockwise). It will be pulled in the clockwise direction). Since the other end (connecting member 3) of the printing plate unit is fixed by the fixing portion 14 of the other plate fixing means 13b, the printing plate 2b is in a state of being pulled in the plate barrel circumferential direction. Although not shown, the printing plate 2a is also in a state of being pulled in the circumferential direction (clockwise direction) by the movement of the other engaging portion in the circumferential direction.
The edge 15d on the fixing portion 14 side of the engaging portion 15 moves to the edge 14c side on the engaging portion 15 side of the fixing portion 14, that is, the pressing plate 21 in FIG. 4 moves to the fixing portion 14 side. The movement of the joint portion 15 is completed (FIGS. 4B and 5B), and by locking the gripping member 25 with the fixture 29, the printing plate 2 is maintained in a state of being pulled in the circumferential direction. , The state in which the printing plate is firmly attached to the surface of the plate cylinder is maintained.
The tension of the printing plate 2 can be set by adjusting the amount of movement of the pressing plate 21, that is, the amount of pushing of the gripping member 25. Further, by providing a plurality of elastic members 22 in the width direction of the printing plate, preferably at equal intervals, the tension of the printing plate 2 can be made uniform in the width direction.

The printing apparatus of the present invention is not limited to the specific examples described above, and various modifications can be made.
[Printing plate unit]
In the specific example described above, in the printing plate unit whose whole is shown by 1, the connecting members formed at both ends in the longitudinal direction of the printing plate are composed of two members, an inner holding member and an outer holding member. As long as the printing plate can be sandwiched and can be engaged with the fixing portion and the engaging portion of the fixing means, the shape is not limited to this, and the printing plate is directly fixed to one member having the engaging portion by screwing or the like. It may be the one that has been printed.
Further, in the specific example shown in the figure, the printing plate unit has a half-circumferential length (longitudinal direction) of the outer peripheral surface of the plate cylinder so that two printing plate units are mounted on the surface of one plate cylinder. Not limited to this, as will be described later, the length (longitudinal direction) of the printing plate can be specified according to the number of fixing means of the plate cylinder. Further, the length of the printing plate unit in the longitudinal direction can be formed longer than the length of being firmly mounted on the plate cylinder within a range of a distance L or less in which the engaging portion can be moved by the above-mentioned urging means. The range of L can be appropriately set depending on the size (diameter) of the plate cylinder, the length in the longitudinal direction of the printing plate, etc., but specifically, L is in the range of 5 to 10 mm in a non-bulging state. It is preferable to be in.

[Cylinder]
In the specific example described above, the plate cylinder is formed with printing plate fixing means at two places so as to mount two printing plate units, but the present invention is not limited to this, and one printing plate is used. When mounting only the unit, fixing means may be formed in one place, and when mounting three printing plate units, fixing means may be formed in three places. Fixing means can be formed according to the number.
Further, as shown in the figure, the plate cylinder is configured by combining two outer cylinders by a hub, but the present invention is not limited to this, and of course, it may be formed from one cylinder. ..

[Plate fixing means]
In the printing apparatus of the present invention, the fixing portion and the engaging portion constituting the plate fixing means can engage and fix the connecting members provided at both ends of the printing plate unit in the circumferential direction and the radial direction, respectively. When the printing plate unit is mounted on the plate cylinder, it should be a guide in the direction of the plate cylinder axis, and the form is not limited to the mode shown in the figure as long as such a function can be exhibited.
For example, in the specific example shown in the figure, the fixing portion of another member is integrally formed by attaching to the plate cylinder, but the connecting member may be directly engaged with the plate cylinder as the fixing portion, or the connecting member may be formed. A fitting portion that can be fitted may be formed directly on the surface of the plate cylinder. Further, the engaging protrusion formed on the fixing portion may be a combination of the engaging concave portion and the convex portion formed on the engaging portion, whereby the printing plate unit can be more reliably inserted and fixed into the plate cylinder. Become.
Further, the engaging portion can hold the printing plate, and when it is urged by the urging means, its shape with the connecting member does not matter as long as the held printing plate can be urged in the circumferential direction. For example, as shown in FIG. 6, a recess 15'a that matches the shape of the inner holding member 4'a of the connecting member 4'and whose width in the circumferential direction becomes wider toward the center of the plate cylinder may be formed. However, the embodiment shown in FIG. 5 can be preferably used because it is easy to mount and the engagement is reliable.

[Ambushing means]
In the printing apparatus of the present invention, the form of the urging means is not limited as long as the engaging portion can be moved in the circumferential direction, the printing plate unit can be pulled, and the printing plate can be loosened.
For example, in the specific example shown in the figure, an embodiment in which the pressing plate integrated with the engaging portion is moved by sliding the tapered surface is adopted by a combination of a pressing member and a slider, and this embodiment is adopted. According to the above, the pressing plate can be moved in the circumferential direction by simply pushing the gripping member upward or downward, and the engaging portion can be easily moved, and the gripping member can be easily attached by fixing the gripping member with a fixture. Although the momentum state could be maintained, the pressing plate may be moved by, for example, directly pushing in the circumferential direction without providing the pressing member. It is also possible to use compressed air or water pressure.
Further, in the specific example shown in the figure, an elastic member was used to alleviate the impact when the engaging portion was moved or to restore the urged state to the previous state, but the repulsive force due to the permanent magnet was used. Etc. can also be used.
Further, as the elastic member, a known member such as a leaf spring or a rubber member can be used in addition to the spring.

1 printing plate unit, 2 printing plates, 3, 4 connecting members, 10 plate cylinder, 11 plate cylinder outer cylinder, 12 hub, 13 plate fixing means, 14 fixing part, 14a fitting part, 14b engaging protrusion, 14c engaging Part side edge, 15 engaging part, 15a pressing part, 15b circumferential member, 15c guide rail, 20 urging means, 21 pressing plate, 22 elastic member, 23 pressing member, 24 slider, 25 gripping member, 26 elastic member , 27 rails, 28 rail guides, 29 fixtures, 31 engaging protrusions, 41 engaging protrusions, 42 engaging recesses.

Claims (5)

A printing plate unit consisting of a printing plate, a set of connecting members attached to both ends of the printing plate in the longitudinal direction and extending in the width direction of the printing plate that can be engaged with the surface of the plate cylinder, and the printing plate unit. A printing device including a plate cylinder that can be mounted by the connecting member.
On the surface of the plate cylinder, a fixing portion that can be fixed by engaging with one of the connecting members, an engaging portion that engages with the other of the connecting members and moves in the circumferential direction of the plate cylinder, and the engaging portion are mounted on the plate cylinder. There is an urging means, which urges in the circumferential direction .
A pressing plate capable of pressing the engaging portion in the circumferential direction of the plate cylinder, a first elastic member capable of urging the pressing plate in the circumferential direction of the plate cylinder, and a surface in contact with the first elastic member. It has a pressing member whose surface on the opposite side is formed as a tapered surface and is movable so as to press the first elastic member, and a tapered surface which is in contact with the tapered surface of the pressing member and is slidable in the plate barrel axial direction. A slider that moves in the plate cylinder axis direction that moves the pressing member in the plate cylinder circumference direction by moving inward, and before being urged when the pressing plate and the fixed portion are in contact with each other and the urging state is released. A printing apparatus comprising a second elastic member that can be restored to a state. The connecting member that engages with the plate cylinder and serves as a fixing portion is composed of an inner sandwiching member and an outer sandwiching member that sandwich and fix the longitudinal edge of the printing plate from the inner and outer surface sides, and the inner sandwiching member is attached to the plate cylinder surface. The connecting member that is fitted and fixed in the formed recess and engages with the engaging portion is composed of an inner holding member and an outer holding member that sandwich and fix the longitudinal end edge of the printing plate from the inner and outer surface sides, and the inner side thereof. clamping member engages with the engaging portion according to claim 1 Symbol placement of the printing device. The printing apparatus according to claim 1 or 2, further comprising a fixture for fixing the state in which the slider is moved inward in the plate barrel axial direction. The pressing plate has rail guides at both ends in the plate barrel axial direction, and the pressing plate moves along a rail attached to the rail guides extending in the plate barrel circumferential direction, according to any one of claims 1 to 3. The printing device described. The engaging portion engages with the engaging convex portion and the engaging concave portion extending in the printing plate width direction formed on the inner holding member of the connecting member, and the engaging convex portion and the engaging concave portion are engaged in the plate barrel axial direction. The printing apparatus according to any one of claims 1 to 4 , which has a guide rail for guiding the printer.

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