JP2600633Y2 - Plate guide device for printing press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate guide device for a printing press for guiding a plate to a plate cylinder when the plate is mounted on the plate cylinder.

[0002]

2. Description of the Related Art As is well known, in order to mount a printing plate on a plate cylinder, first, the leading end of the printing plate is held by a holding plate vice arranged in a notch of the plate cylinder. This holding operation is performed while holding both sides of the printing plate by hand and aligning the leading end portions. Thereafter, the plate cylinder is rotated about one turn to bring the plate into contact with the peripheral surface of the plate cylinder, and the rear end of the plate is placed in the notch of the plate cylinder. It is attached with the rear end held.

[0003]

However, in the conventional gripping operation described above, when the size of the printing plate becomes large, it is necessary to hold both sides of the printing plate by two people. In recent years, PS, which has been the mainstream of printing plates of conventional printing presses, has recently been used.
In place of plates, paper plates with low plate-making costs have become widespread, and when holding paper plates that are less rigid than PS plates, insert the paper plate into a vise because the tip of the paper plate becomes wavy. If the paper plate is gripped at the left and right near the center in the up-down direction at the time of insertion, the rear end portion hangs downward from that portion, so the paper plate must be rolled into a tubular shape and gripped. There was a drawback that it was extremely complicated, required skill, and took a long time.

Accordingly, the present invention has been made in view of the above-mentioned conventional disadvantages, and aims at making it easy to mount a printing plate on a plate vise, shortening work time and saving work time. It is an object of the present invention to provide a printing plate guide device for a printing press that has achieved humanization.

[0005]

Means for Solving the Problems In order to achieve this object, the invention of claim 1, wherein the cover which is openably supported on the frame side, on the cover, Hirakuko the cover
Guides the printing plate to the plate cylinder located below this cover
Between the guiding position and the retracted position above the guiding position.
And a plate guide member movably supported between them . The invention of claim 2 is the same as the invention of claim 1.
A second printing plate guide member movably supported on the frame side at a guide position for guiding the printing plate to the printing drum near the plate cylinder and a retracted position , wherein the second printing plate guide member is In the guidance position
To support a substantially central portion of the printing plate in the left-right direction.

[0006]

According to the present invention, the paper or tool dropped from the printing press falls onto the transport belt and is transported to a position where it can be easily taken out by the transport belt. Also, beneath the printing press for maintenance and inspection.
Divide the transport belt if necessary
Can remove the transport belt.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the entire configuration of a plate guide device for a printing press according to the present invention, FIG. 2 is a front view of the same main part, FIG. 3 is a view as viewed from an arrow A in FIG. 2, and FIG. FIG. 5 is a front view of a main part showing a driving portion of the second printing plate guide member. In these figures, reference numeral 2 denotes a frame constituting a printing unit of a printing press, and 3 and 4 denote vertically extending rails 5 attached to both front sides of the frame 2.
A lower safety cover and an upper safety cover that are slidable up and down and that can be bent at the connecting portion.

Reference numeral 6 denotes a link lever formed in an inverted L-shape. A lower end is attached to the upper safety cover, and the other end is connected to a lever 9 pivotally supported on a pin 8 of a bracket 7 fixed to the frame 2. Are linked. One end of the lever 9 is connected to a piston rod 13 of an air cylinder 10 pivotally supported by a pin 12 of a bracket 11 fixed to the frame 2, and when the piston rod 13 of the air cylinder 10 is advanced, the ring lever 6 moves upward. By being lifted, the upper and lower safety covers 4 and 3 slide upward along the rails 5 to open the front surface of a plate cylinder 42 described later.

Reference numeral 15 denotes a first guide rod, and the lower safety cover 3
Both ends are rotatably supported by a pair of holders 16 erected at both ends of a lower part of the front surface. Reference numerals 17 and 18 denote a pair of holders standing on the lower safety cover 3 obliquely above the holder 16, reference numeral 20 denotes a thin plate-shaped first plate guide member having a slightly smaller width than the lower safety cover 3, and reference numerals 21 and 22 Is a shaft integrally fixed to the lower end folded portion of the first plate guide member, and a protruding portion is pivotally supported by the holders 17 and 18. The first plate guide member 20 is a shaft 21,
It is supported rotatably by holders 17 and 18 together with 22.

Reference numeral 23 denotes a shaft 2 into which the shaft 21 is inserted.
1 is a block which is screwed and fixed to the shaft 1 and rotates integrally with the shaft 21. The block is interposed between the first printing plate guide member 20 and the holder 17 and has a notch 23a. Reference numeral 24 denotes a block-shaped stopper attached to the lower portion of the holder 17, which is provided with an inclined surface 24a and an engaging portion 24b formed at the end of the inclined surface 24a. 26 is the holder 18
The first printing plate guide member 20 is pressed in the direction of arrow C in the drawing, that is, the direction in which the side surface 23b of the block 23 is pressed against the holder 17 by a compression spring that is interposed between the first printing plate guide member 20 and the shaft 22. It is energizing.

Reference numeral 27 denotes a cam which is fixedly screwed to an end of the shaft 22 and rotates integrally with the shaft 22, reference numeral 28 denotes a limit switch fixed to the holder 18, and reference numeral 29 denotes an operator 28a of the limit switch 28 and the cam 27. This is a leaf spring attached to the holder 18 by bolts 30 so as to be interposed between them. Limit switch 28 is actuator 2
8a is operated by being pressed by the cam surface of the cam 27, and an operation signal is sent to the air cylinder 10 to maintain the state where the piston rod 13 is advanced, that is, the state where the safety covers 3 and 4 are opened. .

Reference numerals 32 and 33 denote holders bolted to both ends of the center of the front surface of the lower safety cover 3, and reference numeral 34 denotes a second guide rod rotatably supported by the holders 32 and 33. On the upper end surface of one of the holders 32, a base plate 35 and a stopper 36 are bolted in a piled state, and an engagement groove 36a is formed on a lower end side edge of the stopper 36, and a side surface 36b corresponding to the engagement groove 36a is formed. It is formed in an inclined shape. A stepped engaging portion 33 is provided on the upper end surface of the other holder 33.
The holders 32 and 33 are attached to the lower safety cover 3 such that a distance between the engaging portion 33a and the engaging groove 36a is substantially equal to the width of the first printing plate guide member 20. Reference numeral 38 denotes a third guide rod rotatably supported by holders 39 erected on both lower ends of the upper safety cover 4. Reference numeral 40 denotes a guide member attached so as to extend in the left-right direction at the center of the upper safety cover 4.

Reference numeral 42 denotes a plate cylinder. Inside the cutout on the peripheral surface, a vice side vice 43 and a butt side plate, each comprising a well-known vise table 45,48, grip plates 46,49 and cam shafts 47,50, respectively. A vise 44 is provided. A lever 53 is swingably supported by the frame 2 by a shaft 54. An end of the lever 53 is integrally mounted on an end of a shaft 55 extending in the body axis direction of the plate cylinder 42. . Reference numeral 56 denotes a guide lever, which is a second printing plate guide member fixedly fastened to the shaft 55 and arranged in parallel in the body axis direction. Reference numeral 57 denotes a roller formed of an elastic member rotatably supported by the shaft 55; Is a sleeve interposed between the guide lever 56 and the roller 57.

Reference numeral 61 denotes a connecting lever pivotally connected at one end to the lever 53 and the other end to the center of the link lever 62, and 62 is supported at one end side by the pin 62a so as to be swingable by the frame 2; Are pivotally connected to a piston rod 63a of an air cylinder 63 that is swingably supported by pins 64 on a bracket 65 fixed to the frame 2. Reference numeral 68 denotes a blanket cylinder in contact with the plate cylinder 42, and reference numeral 69 denotes a cleaning device for cleaning the blanket cylinder 68.

Next, the operation of mounting a printing plate in the printing plate guide device of the printing press having the above-described configuration will be described. First, the piston rod 13 of the air cylinder 10 is advanced, and the upper and lower safety covers 4 and 3 are slid upward along the rail 5 to the position indicated by the two-dot chain line in FIG. Then, the front surface of the plate cylinder 42 is opened. The first printing plate guide member 20 at the position D by engaging with the engagement groove 36a of the stopper 36 is slightly moved in the direction opposite to the arrow C against the compression spring 26 in FIG. The engagement with the groove 36a is released, and the shaft is rotated clockwise in FIG.

With this rotation, the block 23 also rotates integrally, and the side surface 23b slides on the inclined surface of the stopper 24, so that the first printing plate guide member 20 is again pressed against the compression spring 27 by an arrow. When it moves in the direction opposite to the direction C and reaches the position E, the notch 23a engages with the engaging portion 24b, and the position is maintained. The position of E is a position where the first plate guide member 20 is inclined toward the plate cylinder 42 and a leading end portion thereof is close to the plate cylinder 42, and is a plate guide position of the first plate guide member 20. . On the other hand, the position D is a retreat position separated from the plate cylinder 42.

Next, the piston rod 63a which has been advanced by operating the air cylinder 63 is retracted. Due to this retreat, the lever 53 rotates counterclockwise in FIG. 1 via the link lever 62 and the connecting lever 61, and the guide lever 56 located at the position F approaches the peripheral surface of the plate cylinder 42,
When the position G is reached, the root of the upper surface of the guide lever 56 coincides with the position of the gap between the vise table 45 of the gripping side vise 43 and the gripper plate 46, and the inclination of the gap and the upper surface of the guide lever 56 The slopes coincide. The position G is a position for guiding the printing plate of the guide lever 56, and a position F separated from the plate cylinder 42 is a retreat position.

Thus, the plate guide path 70 for guiding the plate to the holding plate vise 43 by the first plate guide member 20 at the position E and the guide lever 56 at the position G is formed. . At the same time, the guide member 40 and the first, second, and third guide rods 22, 34, and 38 form the plate guide path 70. When the printing plate is suspended along the printing plate guide path 70,
The vise stand 45 and the holding plate 4 of the vice 43 with the holding side at the tip
6, the camshaft 47 is rotated, and the leading end of the printing plate is held. Next, the plate cylinder 42 is rotated clockwise to position the rear plate vise 44 on the guide lever 56. At this time, since the roller 57 formed of the elastic member is in contact with the peripheral surface of the plate cylinder 42, the printing plate is attached to the peripheral surface of the plate cylinder 42 by the roller 57.

When the rear end of the printing plate is added by the vice 44 on the rear side and the mounting of the printing plate on the plate cylinder 42 is completed, the air cylinder 63 is operated to cause the piston rod 63a to advance and the link lever 62 to move. By rotating the lever 53 clockwise via the connecting lever 61, the guide lever 56 is moved from the position G to the retracted position F. During this series of operations, the limit switch 28 is operated by the cam 27 according to the position of E of the first plate guide member 20,
As a result, the advance of the piston rod 13 of the air cylinder 10 is held, and therefore, the upper and lower safety covers 4, 3
Is not dropped, and the danger during plate mounting work is eliminated.

Thereafter, the first printing plate guide member 20 is moved in the direction opposite to the arrow C against the compression spring 26,
The engagement between the notch 23a of the block 23 and the engaging portion 24b of the stopper 24 is released, and the shaft 23 and the shaft 22 are rotated counterclockwise in FIG. By this rotation, the side edge of the first plate guide member 20 comes into contact with the inclined surface 36b of the stopper 36. When the first plate guide member 20 is further rotated, the first plate guide member 20 is compressed by the compression spring along the inclined surface 36b. 2
Move slightly in the direction opposite to the direction of arrow C against 6
The side edge is engaged with the engagement groove 36a, and the first plate guide member 2
0 is held at the retreat position of D. In this state, the limit switch 28 is released from the cam 27, which allows the piston rod 13 of the air cylinder 10 to retreat. By retreating, the upper and lower safety covers 4, 3 are linked to the link lever 6. , Slides down along the rail 5 to close the front surface of the plate cylinder 42.

In this embodiment, the guide member 40 and the first, second, and third guide rods 15, 34, and 38 are provided as the plate guide path 70 so as to guide the plate more easily. However, this is not always necessary, and the first printing plate guide member 20 or the guide lever 56 may be provided.

[0022]

As has been described above devised], according to the considered <br/> draft according to claim 1, and a cover that is openably supported on the frame side, on the cover, the mosquito by opening the cover
A guide position located below the bar to guide the printing plate to the plate cylinder
And a plate guide member movably supported between a retracted position above the guide position , the cover being opened, and the plate guide member being moved to a guide position for guiding the plate to the plate cylinder. In this way, the printing plate can be mounted on the plate cylinder via the printing plate guide member by one person, and labor saving can be achieved. part that is not the name of a wavy state. In addition, the printing plate is
The plate can be guided to a nearby location, ensuring that the printing plate is guided
Plate mounting accuracy, and close the cover.
When the plate guide member interferes with other members when
Nor. According to the second aspect of the present invention, a frame is provided.
A guide position for guiding the printing plate to the plate cylinder in the vicinity of the plate cylinder;
A second printing plate guide member movably supported at the retracted position;
The second plate guide member is provided with a plate
By supporting approximately the center in the left-right direction, during insertion,
Since the rear end side does not hang downward from the portion gripped by the plate, it is extremely easy to insert the plate into a vise, and mounting can be performed in a short time without requiring skill. Also, printing
Since the plate does not sag in the center, the printing plate can be reliably guided.
As a result, plate mounting accuracy is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire configuration of a printing plate guide device of a printing press according to the present invention.

FIG. 2 is a front view of a main part of the printing plate guide device of the printing press according to the present invention.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a view taken in the direction of arrow B in FIG. 2;

FIG. 5 is a front view of a main part of a driving portion of a guide lever of the plate guide device of the printing press according to the present invention.

[Explanation of symbols]

 2 Frame 3 Lower safety cover 4 Upper safety cover 10 Air cylinder 15 First guide rod 20 First printing plate guide member 23a Notch 24 Stopper 24a Inclined surface 24b Engagement part 26 Compression spring 27 Cam 28 Limit switch 34 Second guide rod 36 Stopper 36a Engagement groove 36b Inclined surface 38 Third guide rod 40 Guide member 42 Plate cylinder 43 Holder plate vise 44 Butt side plate vise 53 Lever 56 Guide lever 63 Air cylinder 68 Blanket cylinder D, F Retreat position E, G Guide position

Claims (2)

(57) [Scope of request for utility model registration] 1. A cover supported on the frame side so as to be openable and closable, and the cover is opened by opening the cover.
Guide position that is located below the cover and guides the plate to the plate cylinder
And a printing plate guide member movably supported between a retracted position above the guide position and a printing plate guide device for a printing press. 2. A plate guide device for a printing press according to claim 1, wherein said frame side is movably supported by a guide position for guiding a plate to a plate cylinder in the vicinity of the plate cylinder and a retracted position. A second printing plate guide member , wherein the second printing plate guide member is
Printing plate guide device for a printing press, wherein the this <br/> supporting the substantially central portion in the lateral direction of the plate at the inner position.