JPS62222850A - Paper positioning device in rotary press - Google Patents

Abstract

PURPOSE:To certainly apply printing not only to the whole of printing paper but also the predetermined area thereof, by a method wherein the printing paper supplied from a paper cassette is fed on the outer peripheral surface of an impression cylinder toward the lower part of a blanket cylinder in such a state that a positioning member is brought into contact with the front end of the printing paper and the position of the printing paper in the advance direction thereof is determined. CONSTITUTION:A paper cassette 14 for mounting printing paper P in a stacked state is arranged in close vicinity to an impression cylinder 2 so as to be positioned in the front side of said cylinder 2 in the supply direction toward a blanket cylinder 13 and a sucker member 32, which sucks the back surface of the printing paper P to feed the same toward the blanket cylinder 13, is provided in the impression cylinder 2 and a positioning member 46 for performing the positional prescription of the printing paper P sucked by the aforementioned sucker member 32 in the advance direction thereof is provided in the impression cylinder 2 so as to be made revolvable by definite quantity to directions the same and opposite to the direction of rotation of said impression cylinder 2. The positioning member 46 is present at stand-up position when the printing paper P is positioned between a paper feed point and a printing point and a contact plate 50 is contacted with the front end of the printing paper P to perform the positioning thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the Invention (Industrial Field of Application) The present invention relates to a paper positioning device for a rotary printing press, more specifically, a paper positioning device for a small rotary printing press used for printing small items such as postcards and business cards. The present invention relates to a paper positioning device.

(Prior art) Conventionally, as this type of small rotary printing press, for example, the 13th
As shown in the figure, an impression cylinder 91 was provided with a recess 92 on its outer circumferential surface, and a support shaft 93 having a plurality of gripping claws 94 was arranged within the recess 92 so as to be rotatable back and forth. In this rotary printing press, the front edge of the printing paper P fed from the paper feeding table 95 is gripped by the gripping claws 94, and as the impression cylinder 91 rotates, the blanket 96 on the blank cylinder 56 is held.
The configuration is such that printing is performed on the printing paper P using a.

However, according to this conventional configuration, since the impression cylinder 91 is provided with the recess 92, not only the entire outer peripheral surface of the impression cylinder 91 cannot be effectively used as a printing paper support surface, but also the printing paper P Since the front edge of the sheet P is a grip area for the gripping claws 94, there is a problem in that printing cannot be performed on this portion, making it impossible to print over the entire surface of the printing paper P.

Therefore, the applicant of the present application proposed a rotary printing press as described below in Japanese Patent Application No. 59-274591.

That is, as shown in FIG.
A pair of flange valves 88 are attached to both sides of the impression cylinder 81 to communicate with an air passage section 83 provided therein, and to rotate relative to the impression cylinder 81. Of these flange valves 88, one flange valve 88 is provided with a suction hole 89, and the other flange valve 88 is provided with a supply hole 90. A pipe 84 extending from a suction device and an air supply device provided in the above was connected.

As shown in FIG. 12, in the above-described printing press, as the impression cylinder 81 rotates, the air passage section 83 is communicated with the supply device or the suction device. Then, during printing, the air passage portion 83 is communicated with the suction device, and the air passage hole 8
The suction part 87 of the impression cylinder 81 due to the small negative pressure generated from the
86 printing paper P on impression cylinder -8=,,,1
-,,. 14 to prevent the printing paper P from shifting. Furthermore, at the end of printing, the air passage section 83 is communicated with the supply device, and the printing paper P adsorbed on the impression cylinder 81 is detached from the impression cylinder 81 by the positive pressure generated from the air passage hole 82.

However, in the above-described printing machine, the printing paper P is
2 and conveyed on the outer peripheral surface of the impression cylinder 81,
When the impression cylinder 81 rotates at high speed, the position of the printing paper P sometimes shifts and is not held at a predetermined position. Therefore, there is a problem that the holding state of the printing paper P varies during printing, and printing may not be reliably applied to a predetermined location on the printing paper P.

(Problems to be Solved by the Invention) As described above, this invention not only cannot use the entire outer peripheral surface of the impression cylinder as a printing paper support surface, but also cannot print on the entire printing paper, and furthermore, when printing This is an attempt to solve the aforementioned problem that the printing paper is not being printed reliably on the specified location due to variations in the holding state of the printing paper. It is an object of the present invention to provide a paper positioning device that can use the outer circumferential surface without wasting it, can print on the entire printing paper, and can also reliably print on a predetermined location on the printing paper.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention, as shown in FIG.
At the same time, a paper cassette 14 for stacking printing paper P is disposed adjacent to the impression cylinder 2 in front of the blank cylinder 13 in the supply direction, and the printing paper P
A sucker member 32 is provided in the impression cylinder 2 for sucking the back side of the printing paper P and transporting the printing paper P in the direction of the blank cylinder 13. A positioning member 46 for regulating the position is provided within the impression cylinder 2 so as to be rotatable by a certain amount in the same direction and in the opposite direction to the rotational direction of the impression cylinder 2.

(Function) By employing the above-described means, the printing paper P supplied from the paper cassette 14 is brought into contact with the front end of the printing paper P to the impression cylinder 2 with its position in the advancing direction determined. It is conveyed to the lower part of the bread cylinder 13 on the outer circumferential surface of the cylinder.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 9.

FIG. 2 shows a printing press according to the present invention, in which an impression cylinder 2 is provided on a rotating shaft S in a frame F of a machine stand 1.
A printing unit 3 is mounted and fixed above. Note that the rotation of the motor M provided at the lower part of the machine base 1 is transmitted to the impression cylinder 2 via a motion transmission mechanism such as a gear (not shown).
The impression cylinder 2 is designed to rotate.

The printing unit 3 is capable of simultaneous two-color printing,
A first printing section 4 and a second printing section 5, each having substantially the same structure, are arranged adjacent to each other. These printing units 4.5 each include an ink supply unit 8 including an ink fountain 6 for storing ink I and a plurality of ink transfer rollers 7, a plate cylinder 10 having a letterpress 9 attached to its outer peripheral surface, and a water roller 11. It is configured. Then, the ink ■ in the ink fountain 6 is kneaded and spread as each ink transfer roller ruff rotates, and the ink ■ in the ink fountain 6 is kneaded and spread.
It is designed to be spread over the entire surface. In addition,
In FIG. 2, reference numeral 12 denotes an ink drawing roller, which can be moved left and right.

A blank cylinder 13 having the same diameter as the plate cylinder 10 is rotatably disposed on the lower side of both plate cylinders 10 and close to each other, and the lower side thereof protrudes from the unit frame U, and an impression cylinder 2 disposed below. is in contact with. This impression cylinder 2 has a diameter twice that of the blank cylinder 13, and has a diameter twice that of the blank cylinder 13.
A paper cassette 14 is mounted at a position in front of the paper cassette 3 in the supply direction so that it can be reciprocated by an intermittent reciprocating mechanism 15 shown in FIG. Further, a recovery section A is fixedly provided behind (on the left side) of the blank cylinder 13 so as to be in contact with the outer circumferential surface of the impression cylinder 2.

As shown in FIG. 1 and FIGS. 7(a) to (C), unused printing paper P is stored in a stacked state in the paper cassette 14, and the lowermost printing paper is placed on the bottom surface. An opening 16 is formed for introducing P onto the impression cylinder 2.

As shown in FIGS. 7(a) to (C), the printing paper P is placed on the impression cylinder 2.
When the paper is fed upward, it passes from the paper feed point [Figure 7 (a)] to the printing point [Figure 7 (b)] and then to the paper release point [Figure 7 (C)].
It is sent to. That is, the printing paper P is guided from the paper cassette 14 to the impression cylinder 2 at the paper feeding point, and is printed in contact with the blank cylinder 13 at the printing point to become the printing paper Pa. Then, this printing paper Pa is transferred to the blank cylinder 13.
The paper is collected into the collection section A at the paper separation position behind the paper.

Note that the paper cassette 14 reciprocates twice during one rotation of the impression cylinder 2, and while the printing paper P moves from just before the paper feeding point to the paper feeding point, the paper cassette 14 and the impression cylinder 2 They are designed to move in sync with each other.

Further, to explain the intermittent reciprocating mechanism 15 according to FIG. 1, the swing rod 17 has its longitudinal center portion rotatably attached to the inner surface of one machine frame F with a shaft 18. An upper part 17a and a lower part 17b are sandwiched therebetween. Furthermore, a cam follower 20 is rotatably attached to the lower end of the swing rod 17, and a tension spring 19 is attached to the lower end, biasing the lower end of the swing rod 17 to the right.

A disk-shaped plate cam 21 that rotates integrally and concentrically with the impression cylinder 2 is attached to the end face of the impression cylinder 2 on the side of the swing rod 17, and its cam surface 21a is attached to the cam follower 2 of the swing rod 17.
0 and rotates as it rotates. A pair of working concave surfaces 21b are formed on the outer peripheral surface of the plate cam 21 at positions facing each other in the radial direction.

When the cam follower 20 of the swing rod 17 rolls on the working concave surface 21b of the plate cam 21, the lower part 17b of the swing rod 17 rotates to the right, and the upper part 17a rotates to the left. As the upper portion 17a of the swing rod 17 rotates to the left, the paper cassette 14 also moves upward on the outer peripheral surface of the impression cylinder 2. In this embodiment, the amount of upward movement of the paper cassette 14 is about 10 degrees.

Note that in FIGS. 1 and 5, reference numeral C denotes a presser claw attached to a part of the paper cassette 14, which is the upper surface of the bottom printing paper P that is detached from the paper cassette 14 and moved to the paper feeding position. This is to lightly suppress the pressure against the outer peripheral surface of the impression cylinder 2. The printing paper P is conveyed to the paper feeding point while sliding while being held down by the presser claws C.

As shown in FIG. 3, the impression cylinder 2 is formed of a metal material into a cylindrical shape, and both ends of its rotating shaft S (only the -m part is shown) are supported by bearings provided on a pair of left and right body frames F, respectively. It is rotatably supported by metal 58. Also,
A driving tooth portion 59 is carved on the entire outer periphery of the right end portion of the impression cylinder 2,
As the driving tooth section 59 rotates, each ink transfer roller 7, plate cylinder 10, and blank cylinder 13 in the printing unit 3 are rotated in synchronization with each other via a plurality of gears (not shown). .

As shown in FIG. 1, a pair of holding recesses 23 are formed in the impression cylinder 2 at positions separated by 180 degrees.

Particularly, as shown in FIG. 4.5, in the case of a fixed installation in the recess 23, a cylindrical surrounding wall 25 is fixed in the wall 24, and a sliding hole 27 is formed in the cover 26 of the surrounding wall 25. It is transparent.

A suction hole 28 is formed through the circumferential wall of the surrounding wall 25, and the attachment is located at a position that is aligned with a communication hole 29 formed through the wall 24.

As described above, a cylindrical sucker member 32 is disposed within the surrounding wall 25 fixedly installed in the holding recess 23, and a decompression chamber 33 is formed between the outer peripheral wall of the sucker member 32 and the inner peripheral wall of the surrounding wall 25. has been done. A surrounding wall 2 is provided on the outer peripheral surface of the soccer member 32.
5 is provided with a protruding step portion 34 that comes into sliding contact with the inner circumferential surface, and is installed between the step portion 34 and the cover portion 26 of the surrounding wall 25]. It is in a downwardly biased state.

Inside the front symbol lever member 32 is a lift chamber 3 that extends vertically.
6 is formed, and communicates with the decompression chamber 33 through a ventilation hole 37 provided through the peripheral wall. Further, the lower end portion of the elevating chamber 36 of the sucker member 32 is formed in a large diameter shape, and a pressure chamber 38 is formed in this large diameter portion. A partition protrusion 39 is formed on the lower outer circumferential wall of the sucker member 32 and is in sliding contact with the surrounding wall 25, and a portion below the partition protrusion 39 has a pressurizing chamber 40 communicating with the pressure chamber 38 via a constricted portion 38a. It is formed. In addition, these decompression chamber 33, elevating chamber 36, ventilation hole 37,
The pressurizing chamber 40 and the spring 35 constitute means for changing the position of the soccer member 32.

The upper end of the sucker member 32 protrudes outward from the sliding hole 27 of the surrounding wall 25, and its upper surface serves as a paper suction surface 42. This paper suction surface 42 has suction holes 4, respectively.
3 is transparently provided and communicates with the elevator room 36. The outer diameter of this sucker member 32 matches the inner diameter of the sliding hole 27 of the surrounding wall 25, and the sucker member 32 is in airtight and slidable contact with the inner peripheral edge of the sliding hole 27.

Further, as shown in FIG. 3, a flange valve 60 is installed on one side of the impression cylinder 2 so as to be relatively rotatable on the rotating shaft S, and is attached to the right end surface of the impression cylinder 2 by the action of a spring 61. It is pressed. As shown in FIGS. 7(a) to 7(c), the inner surface of the outer periphery of the flange valve 60 has a distance from the paper feed point to the paper release point along an arc centered on the rotation axis of the impression cylinder 2. Suction grooves 62 extending with equal length are formed. As shown in FIG. 3, a portion of the suction groove 62 is connected to an outlet hole 64 of a connecting tube 63 protruding from the outer peripheral surface of the flange valve 60. A suction tube 66 inserted through an insertion port 65 transparently provided in one machine frame F is connected to this connection tube 63, and its base end is connected to an air suction device (not shown) installed inside the printing machine. There is.

In addition, the air suction device, flange valve 60 and suction groove 6
Reference numeral 2 is attached to form a paper suction means together with the communication hole 29 of the wall 24. Then, as shown in FIGS. 1 and 5, when the paper cassette 14 reaches the paper feeding point, the paper suction piece 42 of the sucker member 32 touches the front edge of the lowermost printing paper P of the paper cassette 14. When facing each other, one end of the suction hole 62 is arranged to face the open end surface of the communication hole 29, and air in the communication hole 29 is sucked in with the operation of the air suction device, thereby enclosing the holding recess 23. The air inside the wall 25 and the soccer member 32 is sucked.

Furthermore, as shown in FIGS. 7<a> to (C), a circular supply hole 67 is provided in the flange valve 60 at a position slightly to the left of the suction groove 62. A connecting tube (not shown) is formed protruding from the outer surface of the flange valve 60 at a position corresponding to the hole 67. As shown in FIG. 3, a supply pipe 70 inserted into the machine frame F is connected to the connection tube, and is connected to an F supply device (not shown) installed inside the printing press.

In addition, the F supply device, the flange valve 60 and the supply hole 6
Reference numeral 7 is attached to form a paper release means together with the communication hole 29 in the wall. When the printed paper Pa reaches the paper separation position, the suction tube 66 and the open end surface of the communication hole 29 come into contact with each other.

Then, with the operation of the air supply device, air is supplied into the communication hole 29 through the suction pipe 66, and air is supplied into the surrounding wall 25 in the holding recess 23 and the sucker member 32. .

Note that the sucker member 32 is moved upward by the operation of the suction device, and as shown in FIG.
When the printing paper P in the paper cassette 4 reaches the point ○ before the paper feeding point, it starts to rise and rotates in synchronization with the paper cassette 14.

Further, when the paper cassette 14 reaches just before the paper feeding point, the upper surface of the suction piece 42 protrudes from the outer periphery of the impression cylinder 2 and reaches the raised position. And soccer member 3
When the paper adsorption piece 42 of No. 2 adsorbs to the back surface of the lowermost printing iP in the paper cassette 14, the sucker member 32 descends and moves to a lowered position flush with the outer peripheral surface of the impression cylinder 2. There is. The sucker member 32 is in the lowered position,
While holding the printing paper P by suction, it moves forward together with the printing paper P by the rotation of the impression cylinder 2. Thereafter, when the printing paper P passes through the printing point and reaches the paper separation position, the suction is released.

As shown in FIG. 6, two sucker members 32 are arranged in parallel in the axial direction of the impression cylinder 2, and each sucker member 3
A decorative member 45 is provided on the outside of 2. Although these decorative members 45 have the same planar shape as the suction pieces 43 of the soccer member 32, they do not have any function and are simply designed to harmonize the appearance.

As shown in FIG. 1 and FIG. 4.5, in the holding recess 23 of the impression cylinder 2, a pair of positioning members 46 are provided on the blank cylinder 13 side of the sucker member 32 in the same direction and in the opposite direction as the impression cylinder 2. They are arranged in parallel so that they rotate only a certain amount. The positioning member 46 has an abutment plate 50 having a crank-shaped cross section fixed to the end of a support plate 48 fixed on a rotating shaft 47 via a holding shaft 49 extending in the length direction of the impression cylinder 2.

Note that a cam follower 52 is rotatably attached to the end of the holding shaft 49.

Further, as shown in FIG. 6, a fixed cam 53 is provided on the inner surface of the fuselage frame F, and a cam follower 52 of the positioning member 46 moves on the cam surface 54 of the fixed cam 53. As shown in FIG. 9, this fixed cam 53 is formed with two upper and lower working surfaces 55, and when the cam follower 52 of the positioning member 46 moves on the working protrusion 55, the positioning member 46 moves on the impression cylinder 2. It rotates a certain amount in the opposite direction to move from the supine position to the standing position.

As shown in FIG. 9, the positioning member 46 is in the upright position when the printing paper P is located between the paper feeding point and the printing point, and the contact plate 50 is in the upright position. Positioning is performed by contacting the front end of the printing paper P. When the printing paper P approaches the blank 1fil 13 with the rotation of the impression cylinder 2 and reaches just before the printing point, the shaft 51 of the positioning member 46
The upper cam follower 52 has completed the movement of the fixed cam 53 from the working face 55 to the non-working face 56. Therefore, when the printing paper P reaches just before the printing point, the positioning member 4
6 is in a state where the movement from the standing position to the supine position has been completed.

Now, the operation of the rotary printing press constructed as described above will be described below.

The motor M is driven to rotate the impression cylinder 2 and the printing cylinder 10, blank cylinder 13, first printing section 4, and second printing section 5 in the printing unit 3. At the same time, ink I and water are supplied from the ink supply section 8 and the water roller 11 to the blank cylinder 13 via the plate cylinder 10, respectively.

Further, as the impression cylinder 2 rotates, the plate cam 21 rotates,
The cam surface 21a is the cam follower 20 of the swing rod 17.
move above. When the working concave surface 21b of the plate cam 21 reaches the cam follower 20, the lower part 1 of the swing rod 17
7b rotates counterclockwise. Therefore, the swing rod 17
The upper part 17a of the paper cassette 14 rotates counterclockwise.
moves upward and moves in the paper feed direction.

When the paper cassette 14 reaches the paper feeding point, the communication hole 29 of the surrounding wall 24 comes into contact with one end of the suction hole 66 of the flange valve 60, allowing the air suction device and the sucker member 32 to communicate with each other. Therefore, the air in the decompression chamber 33 of the holding recess 23 is sucked, and the air pressure in the decompression chamber 33 is reduced. Thereafter, the pressure in the elevator chamber 36 of the soccer member 32 is reduced through the ventilation hole 37, and the air pressure in the pressurizing chamber 40 is gradually reduced through the constriction portion 40a.

As described above, the decompression chamber 33, the lifting chamber 36, and the pressurization chamber 4
Since the pressure reduction within 0 is performed with a slight time difference, when the pressure reduction chamber 33 is reduced in pressure, the air pressure in the pressurization chamber 40 is maintained at a substantially normal value. Therefore, the pressurizing chamber 40
The air pressure inside becomes higher than the air pressure inside the decompression chamber 33, and this pressure difference causes the entire sucker member 32 to rise against the force of the spring 350.

When the sucker member 32 reaches the raised position, the front surface of the printing paper P located at the lowest stage in the paper cassette 14 is held against the impression cylinder 2 by the presser claw C, and the back surface of the print paper P located at the lowest stage in the paper cassette 14 is held against the impression cylinder 2. The paper is sucked by the paper suction piece 42.

Then, the pressurization chamber 40 and the decompression chamber 33 inside the soccer member 32
This means that the internal air pressures are equal to each other. Then, the sucker member 32 is moved down by the biasing force of the spring 35,
Move to lowered position. Therefore, the printing paper P is held on the same surface as the outer peripheral surface of the impression cylinder 2 and is conveyed in the direction of rotation of the impression cylinder 2.

On the other hand, the cam follower 52 of the positioning member 46 in the supine position moves on the cam surface 54 of the fixed cam 53, and when the printing paper reaches approximately midway between the paper feed point and the printing point, the operating protrusion of the fixed cam 53 It reaches above 55. Then, the positioning member 46 moves from the supine position to the upright position, and its contact plate 5
0 comes into contact with the front wheel of the printing paper P to position the printing paper P. Thereafter, the positioning member 46 rotates together with the impression cylinder 2.

When the printing paper P reaches just before the printing point, the cam follower 52 of the positioning member 46 rolls from the working face 55 of the fixed cam 53 to the non-working face 56. Then, the positioning member 46 moves from the upright position to the supine position and releases the positioning of the printing paper P. After that, the printing paper P is sucked by the sucker member 32 and sent to the printing point, and after being printed between the impression cylinder 2 and the blank cylinder 13, it is sent to the paper separation point as the printing paper Pa. Sent.

When the printing paper Pa reaches the paper separation point with the rotation of the impression cylinder 2, the communication hole 29 of the surrounding wall 24 is connected to the flange valve 60.
The air supply device and the sucker member 32 are brought into communication with each other. Therefore, air feeding into the decompression chamber 33 and the sucker member 32 is started. Then, air is discharged from the suction hole 44 of the paper suction piece 42, and the printing paper Pa is separated from the suction piece 42 due to this air pressure, and the suction is released. Thereafter, the printing paper Pa is sent in the rotational direction of the impression cylinder 2 and collected into the collecting section A, completing one printing cycle. Then, when the impression cylinder 2 rotates half a rotation and the other holding recess 23 reaches below the paper cassette 14, the next printing cycle is started.

In the above printing cycle, soccer club + A32
and the paper cassette 14 move in synchronization.

Therefore, when the printing paper P is taken out from the paper cassette 14, the paper suction surface 42 of the sucker member 32 in the raised position and the printing paper P are in a relatively stopped state. Therefore, when suctioning the printing paper P.

There is no deviation in the relative position between the paper suction surface 42 of the sucker member 32 and the printing paper P. Therefore, even when the impression cylinder 2 rotates at high speed, the sucker member 32
The printing paper P is surely attracted and conveyed to the printing point. That is, regardless of whether the printing speed is slow or fast, the printing paper P is reliably sent to the printing point.

Further, the printing IF, P is conveyed on the impression cylinder 2 in its rotational direction. Therefore, a force is applied to the printing paper P in the traveling direction. However, between the paper feeding point and just before the printing point, the front end of the printing paper P is in contact with the contact plate 50 of the positioning member 46. Therefore, the printing paper P is transported to the printing point with the front position determined by the positioning member 46, and even when the impression cylinder 2 rotates at high speed, the printing paper P is surely prevented from slipping during transport. It will be done. Therefore, it is possible to print at a predetermined position on the printing paper P.

In addition, when the sucker member 32 is in the lowered position, its paper suction surface 42 is on the same plane as the outer peripheral surface of the impression cylinder 2. Therefore, the entire outer peripheral surface of the impression cylinder 2 can be used as a support surface for the printing paper P.

Further, since the printing paper P has a structure in which the back side is attracted by the sucker member 32, printing can be performed on the entire surface of the printing paper P.

Next, a second embodiment of the present invention will be described in detail with reference to FIG.

In this embodiment, the sucker member 32 is fixed within the holding recess 23 of the impression cylinder 2, and the spring 35 is omitted.
The surface of the paper suction surface 42 is set at the same height as the outer periphery of the impression cylinder 2. By using a suction device and an air supply device, respectively, the sucker member 32 is configured to attract and release the suction of the printing paper P.

With this configuration, the configuration of the soccer member 32 becomes simpler and the manufacture of the soccer member 32 becomes easier.

Note that the present invention is not limited to the above-described embodiments; (1) The number of the soccer members 32 and the positioning members 46 may be arbitrarily set, or another printing plate such as an intaglio may be used instead of the letterpress printing plate 9 for the 0 printing plate 11filLO. 2) Using a cam mechanism as a means for changing the position of the sucker member 32 in the first embodiment, etc., changes may be made without charge as long as they do not depart from the spirit of the invention.

Effects of the Invention As described in detail above, the present invention connects and arranges an ink supply section, a plate cylinder, and a blank cylinder, and also has an arrangement for placing 8 IN of printing paper on the impression cylinder in front of the blank cylinder in the supply direction. The paper cassettes are arranged close to each other, and a sucker member is provided in the impression cylinder to suck the back side of the printing paper and transport the printing paper toward the blank cylinder. The positioning member for regulating the position in the direction of movement is provided within the impression cylinder so that it can rotate by a certain amount in the same direction and in the opposite direction to the rotation direction of the impression cylinder, so that the outer peripheral surface of the impression cylinder can be used without wasting it. At the same time, it is possible to print on the entire printing paper,
Furthermore, it exhibits the excellent effect of being able to reliably print on a predetermined location on the printing paper.

[Brief explanation of drawings]

Figures 1 to 8 show a first embodiment of the invention, of which Figure 1 is a schematic side view showing the first embodiment of the invention, and Figure 2 shows the entire printing press. 3 is a front view, FIG. 3 is a sectional view showing the internal structure of the impression cylinder and the flange valve, FIG. 4 is a partially broken enlarged sectional view showing the sucker member and the positioning member in the lowered position and supine position, respectively, and FIG.
The figure is a partially cutaway enlarged sectional view showing the soccer member and the positioning member in the raised position and the standing position, respectively. Figure 6 is a plan view of the impression cylinder. Figures 7 (a) to (C) are the printing paper sheets. 8 is a diagram showing the timing of movement of the paper cassette, sucker member, and positioning member. FIG. 9 is a rotation device for the positioning member. 10 is a side view showing a second embodiment of the present invention, and FIGS. 11 and 12 show related technology, of which FIG. 11 shows an impression cylinder and a paper cassette. 12 is a sectional view of the impression cylinder, and FIG. 13 is a front view of the female body showing the conventional technique. Explanation of symbols Impression cylinder 2, ink supply section 8, plate cylinder 10, blank cylinder 13, paper cassette 14, sucker member 32, positioning member 46
, printing paper P. Patent applicant Sakurai Seisakusho Co., Ltd. Agent
Patent Attorney On 1) Hiroshi Nobuo Figure 4 Figure 5

Claims (1)

[Claims] 1. Ink supply section (8), plate cylinder (10), and blank cylinder (1)
3) and the blank cylinder (13).
A paper cassette (14) for stacking printing paper (P) is arranged close to the impression cylinder (2) in front of the feeding direction of the printing paper (P). ) is provided in the impression cylinder (2) for conveying the printing paper (P) in the direction of the blank cylinder (13).
) is provided within the impression cylinder (2) so as to be rotatable by a certain amount in the same direction and in the opposite direction to the rotational direction of the impression cylinder (2). Features of paper positioning device in rotary printing presses. 2. A sheet positioning device in a rotary printing press according to claim 1, wherein the positioning member (46) is provided so as to be able to move in and out of the impression cylinder (2) depending on the direction of rotation thereof. 3. The positioning member (46) includes an abutment plate (50) having a crank-shaped cross section that abuts the end face in the traveling direction of the printing paper (P), and a holding shaft (49) that supports the abutment plate (50); It is provided at the end of this holding shaft (49) and the fuselage frame (
A cam follower (5) that rotates the positioning member (46) by a certain amount in cooperation with a fixed cam (53) provided on the inner surface of the
2) A sheet positioning device in a rotary printing press according to claim 1, characterized in that the device comprises: