JP3933802B2 - Plate changer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate changing apparatus for changing a plate of a printing drum of a printing press.
[0002]
[Prior art]
An example of a conventional plate exchange apparatus for exchanging a plate of a printing cylinder is described in Japanese Patent Application Laid-Open No. 7-290688. As shown in FIG. 6, the plate changer removes the gripping edge 130b of the plate 130 from the gap 131a of the plate cylinder 131 while pressing the plate 130 wound around the plate cylinder 131 with the pressing roller 71 (FIG. 6 (a )), The plate cylinder 131 is rotated to feed the plate 130 out of the plate cylinder 131 onto the guide tool 72 (see FIG. 6B), and the holding end 130a of the plate 130 extends from the gap 131a of the plate cylinder 131. When it comes off, the plate 130 is sucked and held by the suction holding device 73 (see FIG. 6C), and the plate 130 is further sent out by the suction holding device, so that the plate 130 is removed from the plate cylinder 131. In FIG. 6, reference numeral 132 denotes a rubber cylinder.
[0003]
[Problems to be solved by the invention]
When the plate 130 is removed from the plate cylinder 131 as described above, the holding end 130a of the plate 130 is bent at an acute angle, so that the holding end 130a is not easily detached from the gap 131a of the plate cylinder 131, but also the plate 130. Was difficult to send out smoothly.
[0004]
Therefore, there has been a strong demand for a plate changer that can reliably remove the holding end 130a of the plate 130 from the gap 131a of the plate cylinder 131 and smoothly feed the plate 130 out of the machine.
[0005]
[Means for Solving the Problems]
A plate changer according to the present invention for solving the above-mentioned problems is provided so as to be able to advance and retreat, and by moving forward, a plate extraction means for extracting the plate bending portion of the plate from the gap of the plate cylinder, and the vicinity of the plate extraction means The plate bending portion of the plate is rotated as the plate is moved in the discharge direction when the plate bending portion of the plate extracted by the plate extracting means is engaged. It comprises plate bending part guide means for releasing the engagement with the part.
[0006]
In the plate exchanging apparatus described above, the plate bending portion guide means is provided in the plate extracting means.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment in which the plate changer according to the present invention is applied to a double-sided printing machine will be described with reference to FIGS. 1 is a schematic configuration diagram of a main part member on the upper side of the rotary printing press, FIG. 2 is a schematic configuration diagram of a main part member on the lower side of the rotary printing press, and FIG. 3 is a development of FIG. 4 and 4 are configuration diagrams of the swivel plate.
[0008]
As shown in FIG. 1, a rubber cylinder 112 is in contact with a plate cylinder 111 to which the plate 110 is attached. On the other hand, as shown in FIG. 2, a rubber cylinder 122 is in contact with a plate cylinder 121 to which the plate 120 is attached. The lower part of the rubber cylinder 112 and the upper part of the rubber cylinder 122 are in contact with each other, and a web or the like passes between the rubber cylinders 112 and 122.
[0009]
That is, when ink is supplied to the plates 110 and 120 of the plate cylinders 111 and 121 from an ink supply device (not shown), the ink corresponding to the pattern of the plates 110 and 120 is transferred to the rubber cylinders 112 and 122, respectively. The design can be printed on both sides of the web or the like passing between the two.
[0010]
As shown in FIGS. 1 and 2, the plate cylinders 111 and 121 are provided with gaps 111a and 121a for holding the holding ends 110a and 120a and the holding ends 110b and 120b, which are plate bending portions of the plates 110 and 120, respectively. Yes. Press rollers 26 and 46 that press the plates 110 and 120 against the plate cylinders 111 and 121 are in contact with the plate cylinders 111 and 121, respectively. In the vicinity of the plate cylinder 111, a fixed guide plate 10 for guiding the plate 110 from the upper surface to the plate cylinder 111 is provided. In the vicinity of the plate cylinder 121, a fixed guide plate 30 for guiding the passage of the plate 120 from the lower surface is provided.
[0011]
As shown in FIG. 2, a support arm 51 that temporarily supports the plate 120 is provided in the vicinity of the guide plate 30, and the support arm 51 is set to a set position (position shown) by driving means (not shown). It is switched to the retreat position, and can be stored so as not to obstruct work when it is unnecessary.
[0012]
On the other hand, as shown in FIGS. 2 and 3, in the vicinity of the plate cylinder 121, the support shaft 31 is rotatably supported so that the longitudinal direction is directed along the axial direction of the plate cylinder 121. One end side of the support bracket 32 is fitted and fixed to one end side of the support shaft 31, and the support bracket is attached to the other end side of the support shaft 31 in the same manner as the support bracket 32. These support brackets 32 support a guide plate 33 which is a plate guide for guiding the passage of the plate 120 from the upper surface from the back surface. The other end side of the support bracket 32 is rotatably connected to the tip end side of the rod 34a of the air cylinder 34. The base end of the air cylinder 34 is connected to and supported by the frame.
[0013]
That is, when the rod 34a of the air cylinder 34 is extended, the guide plate 33 is set so as to face the guide plate 30 and guide the passage of the plate 120 (advance position), and the rod 34a of the air cylinder 34 contracts. If it does, it will separate from the said guide plate 30, and will retract | save from the passage of the plate | board 120 (evacuation position).
[0014]
A guide roller 35 that smoothens the passage of the plate 120 is provided on the swinging tip side of the guide plate 33. At both side ends of the guide plate 33, a contact plate 36 that restricts the displacement in the width direction of the plate 120 is provided upright. Near the tip of the back surface of the guide plate 33, a support shaft 37 is rotatably supported so that the axis is directed along the axial direction of the support shaft 31. One end of a support bracket 38 is fitted and fixed to the support shaft 37. A guide roller 39 is supported on the other end side of the support bracket 38 so as to be rotatable about an axis along the axial direction of the support shaft 37, and the guide roller 39 is formed on the guide plate 33. The hole 33a can project from the back side to the front side of the guide plate 33 as the support shaft 37 rotates.
[0015]
The middle of the support bracket 40 is connected and fixed to the outer end of the support shaft 37 in the width direction of the guide plate 33. Near the support shaft 31 side of the support bracket 40, the tip of the rod 41a of the air cylinder 41 is rotatably connected. The base end of the air cylinder 41 is rotatably connected to and supported by a support bracket 42 provided near the support shaft of the guide plate 33.
[0016]
That is, when the rod 41a of the air cylinder 41 is contracted, the support shaft 37 is moved via the support bracket 40 so that the guide roller 39 protrudes (advances) to the front side (advance position) of the guide plate 33 via the support bracket 38. When the rod 41a of the air cylinder 41 is rotated and extended, the support roller 37 is supported via the support bracket 40 so that the guide roller 39 is immersed (retracted) into the back side (retracted position) of the guide plate 33 via the support bracket 38. Will rotate.
[0017]
As shown in FIGS. 2 to 4, on the distal end side of the guide plate 33 of the support bracket 40, the leg portion 43 a of the revolving plate 43 having a substantially U shape so as to have leg portions 43 b at both ends of the main body portion 43 a is provided. Connected and fixed.
[0018]
That is, when the rod 41a of the air cylinder 41 is extended, the swivel plate 43 is placed on the front side (retracted position) of the guide plate 33 so that the main body 43a is parallel to the guide plate 33 with a predetermined interval. Then, when the rod 41a of the air cylinder 41 is contracted, the main body 43a turns (advances) so as to move to the back side (advance position) of the guide plate 33.
[0019]
On the distal end side in the turning direction of the turning plate 43 to the advance position of the main body 43a, a rotating plate 44 that can turn around the same axis as the support shaft 27 is provided in the longitudinal direction of the main body 43a. The rotation plate 44 has a limit position (initial position) in which the rotation plate 44 cannot be rotated in the rotation in the same direction as the turning direction from the advance position of the turning plate 43 to the retracted position. The spring 45 is urged by the spring 45 so as to return to the initial position when the turning plate 43 is rotated in the same direction as the turning direction from the retracted position to the advanced position.
[0020]
As shown in FIG. 1, in the vicinity of the plate cylinder 111, the support shaft 11 is rotatably supported so that the longitudinal direction is directed along the axial direction of the plate cylinder 111. A support bracket 12 similar to the support bracket 32 is fixed to the support shaft 11, and the support bracket 12 supports a guide plate 13 which is a plate guide for guiding the plate 110 from the lower surface to the plate cylinder 111 from the back surface. is doing. The support bracket 12 is rotatably connected to the distal end side of the rod 14a of the air cylinder 14 similar to the air cylinder 34.
[0021]
That is, as in the case of the guide plate 33, the guide plate 13 is set so as to guide the passage of the plate 110 facing the guide plate 10 by extending the rod 14a of the air cylinder 14. Position), by retracting the rod 14 a of the air cylinder 14, the air cylinder 14 is separated from the guide plate 10 and retracted from the passage of the plate 110 (retracted position).
[0022]
The guide plate 13 is provided with a guide roller 35 and a contact plate 16 similar to the guide roller 35 and the contact plate 36. Further, the guide plate 13 is provided with a support shaft 17, a support bracket 18, and a guide roller 19 similar to the support shaft 37, the support bracket 38, and the guide roller 39. As in the case of the guide roller 39, the guide plate 13 can protrude from the back side to the front side.
[0023]
A tip of a rod 21a of an air cylinder 21 similar to the air cylinder 41 is rotatably connected to the support shaft 17 via a support bracket 20 similar to the support bracket 40. The base end of the air cylinder 21 is connected to and supported by a support bracket 22 provided on the guide plate 13 in a manner similar to the support bracket 42.
[0024]
That is, as in the case of the guide roller 39, the guide roller 19 protrudes (advances) to the front side (advance position) of the guide plate 13 due to the contraction of the rod 21a of the air cylinder 21, and the rod 21a of the air cylinder 21 increases. As a result, the guide plate 13 is immersed (retracted) into the back side (retracted position).
[0025]
Further, a pivot plate 23 similar to the pivot plate 43 is connected and fixed to the support bracket 18, and the pivot plate 23 is extended when the rod 21 a of the air cylinder 21 is extended as in the case of the pivot plate 43. When the rod 21a of the air cylinder 21 is contracted, the main body 23a is positioned on the front side (retracted position) of the guide plate 13 so that the main body 23a is parallel to the guide plate 13 at a predetermined interval. The part 23a turns (advances) so as to move to the back side (advance position) of the guide plate 13.
[0026]
The turning plate 23 is provided with a turning plate 24 and a spring 25 similar to the turning plate 44 and the spring 45, and the turning plate 24 is similar to the case of the turning plate 44. In the rotation in the same direction as the turning direction of the swivel plate 23 from the advanced position to the retracted position, a limit position (initial position) that cannot be turned is set, and the turning direction of the swivel plate 23 from the retracted position to the advanced position In the rotation in the same direction, the spring 25 is urged so as to return to the initial position.
[0027]
In the present embodiment, the support shafts 17 and 37, the support brackets 18 and 38, the guide rollers 19 and 39, the support brackets 20 and 40, the air cylinders 21 and 41, the support brackets 22 and 42, the turning plates 23 and 43, and the like. The plate extracting means is constituted by the above, and the plate bending portion guiding means is constituted by the rotating plates 22 and 42, the springs 25 and 45, and the like.
[0028]
The removal of the plate using the plate changing apparatus having such a configuration will be described with reference to FIG. FIG. 5 is an explanatory diagram of the operation. However, the plate cylinder 111 side and the plate cylinder 121 side have the same operation except for the direction, and therefore the plate cylinder 111 side will be described and the description of the plate cylinder 121 side will be omitted.
[0029]
First, the rod 14a of the air cylinder 14 is extended to move to the advanced position so that the guide plate 13 faces the guide plate 10, and the rod 21a of the air cylinder 21 is extended to move the guide roller 19 to the guide plate 13. At the same time, the revolving plate 23 is set at the retracted position between the guide plates 10 and 13 (the state indicated by the solid line in FIG. 1).
[0030]
Next, the holding edge 110b of the plate 110 is removed from the gap 111a of the plate cylinder 111, and the plate cylinder 111 is rotated while pressing the plate 110 with the pressing roller 26, so that the plate 110 is removed from the plate cylinder 111 and the main body of the swivel plate 23. It passes between 23a and the guide plate 13, and it sends out between the guide plates 10 and 13 (refer Fig.5 (a)).
[0031]
When the plate cylinder 111 is sent out in this way and the gap 11a of the plate cylinder 111 reaches the vicinity of the pressing roller 26, the pressing roller 26 is retracted away from the plate cylinder 111, while the rod 21a of the air cylinder 21 is retracted. The revolving plate 23 turns to the back side of the guide plate 13 and the guide roller 19 protrudes from the back side of the guide plate 13 so that the holding end 110a of the plate 110 is removed from the gap 111a of the plate cylinder 111. The travel route of the plate 110 is moved (see FIG. 5B).
[0032]
When the holding end 110a of the plate 110 is extracted from the gap 111a of the plate cylinder 111 in this way, the rod 21a of the air cylinder 21 is extended so that the holding end 110a of the plate 110 is connected to the main body portion 23a of the turning plate 23 and the guide plate. The revolving plate 23 is retracted to the retracted position so that it can pass smoothly between the guide plates 10 and 13 from between (see FIG. 5C).
[0033]
At this time, the plate 110 removed from the plate cylinder 111 is curved by the outer peripheral surface of the plate cylinder 111 as shown by a two-dot chain line in FIG. The holding end 110 a of the plate 110 is caught by the tip of the turning plate 23, that is, the rotating plate 24 due to its shape. However, the rotating plate 24 is pulled and rotated by this, and after guiding the holding end 110a of the plate 110 in the discharging direction without interfering with the rotating plate 23, the rotating plate 24 is returned to the initial position by the urging force of the spring 25. To do. As a result, the plate 110 is smoothly fed out.
[0034]
Therefore, according to such a plate changer, the holding ends 110a and 120a of the plates 110 and 120 can be reliably removed from the gaps 111a and 121a of the plate cylinders 111 and 121, and the plates 110 and 120 can be smoothly operated. Can be sent out.
[0035]
【The invention's effect】
According to the plate exchanging apparatus according to the present invention, the holding end of the plate can be reliably removed from the gap of the plate cylinder, and the plate can be smoothly fed out of the machine, so that the labor for the operator to remove directly is eliminated. Thus, the work efficiency can be improved and the cost for the work can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a main part on the upper side of an embodiment when a plate changing apparatus according to the present invention is applied to a double-sided printing machine.
FIG. 2 is a schematic configuration diagram of a main part member on the lower side of the embodiment when the plate changing apparatus according to the present invention is applied to a double-sided printing machine.
FIG. 3 is a development view of FIG. 2;
FIG. 4 is a configuration diagram of a swivel plate.
FIG. 5 is an operation explanatory diagram.
FIG. 6 is an explanatory diagram of an example of a conventional plate exchange device.
[Explanation of symbols]
10, 30 Guide plate 11, 31 Support shaft 12, 32 Support bracket 13, 33 Guide plate 14, 34 Air cylinder 14a, 34a Rod 15, 35 Guide roller 16, 36 Abutting plate 17, 37 Support shaft 18, 38 Support bracket 19 , 39 Guide rollers 20, 40 Support brackets 21, 41 Air cylinders 21a, 41a Rods 22, 42 Support brackets 23, 43 Rotating plates 23a, 43a Body portions 23b, 43b Leg portions 24, 44 Rotating plates 25, 45 Spring 26, 46 Pressing roller 51 Support arm 110 120 Plate 110a, 120a Mouth end 110b, 120b Mouth end 111, 121 Plate cylinder 111a, 121a Gap 112, 122 Rubber cylinder

Claims (2)

A plate extracting means that is provided so as to be capable of advancing and retreating, and for extracting the plate bending portion of the plate from the gap of the plate cylinder by advancing;
It is provided in the vicinity of the plate extracting means so as to be rotatable , and when the plate bending portion of the plate extracted by the plate extracting means is engaged, the plate rotates as the plate moves in the discharge direction. A plate exchanging apparatus comprising: a plate bending portion guide means for releasing engagement of the plate with the plate bending portion. The plate changer according to claim 1, wherein the plate bending portion guide unit is provided in the plate extraction unit.

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