JPH09141825A - Plate cylinder changing device for gravure printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simply structured device for replacing a plate cylinder for a gravure printing machine. SOLUTION: A plate cylinder changing truck 21 with a plate cylinder 6, an ink pan, an ink tank 27 and an ink pump 28 mounted aboard is mobile to an area outside/inside a printing unit 1. In addition, a plate cylinder support member 30 for supporting the plate cylinder 6 is provided on the upper end of the plate cylinder replacement truck 21 in such a manner that the member 30 is elevated up and down. At the same time, on the lateral face of the member 10, a cam follower 33 is provided, and also on the printing unit 1, a cam 35 to be engaged with the cam follower 33 is provided along the passageway of the plate cylinder changing truck 21. When moving the truck 21 to an area outside/inside the printing unit 1, the member 30 is elevated up and down by the cam 35 through the cam follower 33 so that it is possible to transfer the plate cylinder 6 on the member 30 to a plate cylinder bearing 13 on the printing unit 1, or reversely, transfer the plate cylinder on the plate cylinder bearing 13 onto the plate cylinder support member 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate cylinder changing device for replacing a plate cylinder in a printing unit of a gravure printing machine.

[0002]

2. Description of the Related Art Conventionally, as a plate cylinder exchanging device for a gravure printing machine, an exchanging arm for holding and swinging the plate cylinder is provided on the printing unit side, and the plate cylinder is placed on a dolly and placed in front of the printing unit. A method is known in which the plate cylinder on the carriage is taken out by the exchanging arm and carried to a predetermined position in the printing unit. Further, the plate cylinder exchange carriage that holds the plate cylinder so that it can be raised and lowered is made movable in the printing unit, and the plate cylinder exchange carriage is moved to a predetermined position in the printing unit with the plate cylinder being lifted, and at that position the plate is exchanged. There is also known a structure in which the plate cylinder is set on a plate cylinder bearing provided in a printing unit by lowering the cylinder.

[0003]

However, in the system using the exchange arm, it is necessary to provide the exchange arm having a complicated mechanism and the drive mechanism for swinging the exchange arm in the printing unit, which requires a large space. However, there is a problem in that it requires a large amount of equipment cost. Further, in the system of moving the plate cylinder changing carriage into the printing unit, it is necessary to provide a drive mechanism for raising and lowering the plate cylinder in the plate cylinder changing carriage, which makes the plate cylinder changing carriage complicated and It is necessary to take the power of the drive mechanism from an appropriate power source, and there is a problem that the equipment cost also increases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a plate cylinder changing device capable of performing plate cylinder replacement with a simple mechanism.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a printing unit of a gravure printing machine is provided with a printing unit of a plate cylinder bearing which is provided to rotatably support lower surfaces of plate cylinder shafts at both ends of the plate cylinder. In a plate cylinder exchanging device for attaching and detaching, a plate cylinder support member capable of mounting and lowering a plate cylinder and a cam follower provided on a side surface of the plate cylinder support member are provided, and the inside and outside of the printing unit and inside the printing unit. A plate cylinder exchange carriage that is movable in a direction perpendicular to the axis of the plate cylinder to be set, and a printing unit provided along the movement path of the plate cylinder exchange carriage and engageable with the cam follower. When the plate cylinder changing carriage is moved to a predetermined position in the printing unit, the cam moves up and down the plate cylinder supporting member through the cam follower to support the plate cylinder. The plate cylinder supported by the members It can be transferred to the plate cylinder bearing of the printing unit, and when the plate cylinder exchange carriage is moved out of a predetermined position in the printing unit, the plate cylinder support member is moved up and down via the cam follower. The plate cylinder changing device of a gravure printing machine is characterized in that the plate cylinder supported by the plate cylinder bearing can be lifted and removed by a plate cylinder supporting member.

In the plate cylinder changing device having the above-described structure, when the plate cylinder changing carriage is moved into the printing unit while the plate cylinder supporting member provided in the plate cylinder changing carriage is supported, The cam follower provided on the support member engages with the cam on the printing unit side, and the plate cylinder support member and the plate cylinder supported by the plate cylinder are lifted as they move into the printing unit, and then the plate cylinder can be lowered. The shaft can be transferred from above the plate cylinder bearing of the printing unit into the recess formed by the plate cylinder bearing, and also when the plate cylinder replacement carriage is moved out of a predetermined position in the printing unit. The cam follower engages with the cam on the printing unit side, and the plate cylinder support member and the plate cylinder supported by the plate cylinder support member are lifted as they move out of the printing unit, and then are lowered to enter the recess of the plate cylinder bearing. The lifting the plate cylinder can be lifted off a plate cylinder support member.

[0007] Here, it is preferable that the plate cylinder exchanging carriage is configured to move from the front side of the printing unit to a predetermined position in the printing unit and pass from the predetermined position to the rear side of the printing unit. With this configuration, when the plate cylinder is replaced, the plate cylinder replacement carriage in the printing unit is discharged to the rear side of the printing unit, so that the plate cylinder attached to the printing unit can be taken out, and at the same time, the printing unit can be removed. By moving another plate cylinder changing carriage that was waiting on the front side of the printer into the printing unit, a new plate cylinder can be attached to the printing unit, and it is possible to perform plate cylinder replacement in an extremely short time. .

Further, it is preferable that the plate cylinder exchanging carriage is provided with an ink pan and an ink supply means for supplying ink to the ink pan. With this configuration, not only the plate cylinder but also the ink pan and the ink supply means can be replaced at the same time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention shown in the drawings will be described below. FIG. 1 illustrates a printing unit of a gravure printing machine equipped with a plate cylinder changing device according to an embodiment of the present invention, in a state before the plate cylinder changing carriage is placed in the printing unit and at a position outside a side surface of the plate cylinder changing carriage. 2 is a schematic cross-sectional view of the printing unit, and FIG. 2 is a schematic cross-sectional view of the printing unit with the plate cylinder changing carriage set at a predetermined position and cut at the center thereof. It is a schematic front view of the printing unit shown. 1 to 3, 1 is a printing unit,
2 is a pair of left and right side frames, 3 is a web to be printed, 4 and 5 are guide rollers attached to the pair of side frames 2 so as to guide the web 3, 6
Is a plate cylinder, 7 is an impression cylinder, and 8 is an impression cylinder holding member that holds the impression cylinder 7. The position where the impression cylinder 7 is pressed against the plate cylinder 6 (the position shown in FIG. 2) and the position where it is retracted upward ( (Position shown in FIG. 1)
It can be moved to and. Reference numeral 9 is a finisher roller, 10 is an arm swinging so as to press the finisher roller 9 against the plate cylinder 6, 11 is an inking applicator, and 12 is a doctor.

Reference numeral 13 denotes a plate cylinder bearing that rotatably supports the lower surfaces of the plate cylinder shafts 6a at both ends of the plate cylinder 6. This plate cylinder bearing 1
3 includes a bearing support 15 attached to the side frame 2 and held by a support 14 and a pair of bearings 16 rotatably held in the bearing support 15 with a space therebetween. As shown, by placing the plate cylinder shaft 6a in the recess formed by the pair of bearings 16, the plate cylinder shaft 6a can be rotatably supported. In FIG. 3, 18 is a drive shaft for rotationally driving the plate cylinder 6, 19 is a coupling provided at the tip of the drive shaft 18, and is connected to one end of the plate cylinder shaft 6a as shown in the drawing. It is movable to a position and a retracted position away from the plate cylinder shaft 6a.

In FIG. 1 to FIG. 3, reference numeral 21 is a plate cylinder exchange cart. The plate cylinder exchange cart 21 includes a cart 24 having casters 23, an ink pan 26 held by the cart 24, an ink tank 27, an ink pump 28, and the like. Further, the carriage 24 has a plate cylinder support member 30 arranged so as to be positioned outside both ends of the ink pan 26, and a support cylinder 31 for holding the plate cylinder support member 30 so that the plate cylinder support member 30 can be raised and lowered. The body support member 30 is normally the support cylinder 3
1 is held at the position where it abuts the bottom surface. At the upper end of the plate cylinder support member 30, a concave portion 3 having an arc shape or a V shape is formed.
0a is formed, and the plate cylinder 6 can be held in a fixed position by placing the plate cylinder shaft 6a of the plate cylinder 6 in the recess 30a. The printing unit 1 and the plate cylinder changing carriage 21 are arranged such that the plate cylinder changing carriage 21 is set on the printing unit 1 from the front of the printing unit 1 as shown by an arrow A in FIG. It is configured to be able to enter in a direction perpendicular to the axis of and to pass through to the opposite side. Further, in the printing unit 1, the plate cylinder changing carriage 21 standing by in front of the printing unit 1 is drawn into a predetermined position (position for performing the printing operation shown in FIG. 2) in the printing unit 1 and discharged to the opposite side. A drive mechanism (not shown) for performing the operation is provided.

As shown in FIG. 4, a cam follower 33 composed of a rotatable roller is rotatably attached to the side surface of the plate cylinder support member 30. On the other hand, the printing unit 1
Is provided with a cam 35 along the movement path of the plate cylinder changing carriage 21 and so as to be able to engage with the cam follower 33. This cam 35 has an upslope part 35a, a central concave part 35b, and a downslope part 35c from the upstream side (from the left side) in the moving direction of the plate cylinder exchanging carriage indicated by arrow A in FIG. 5A, when the plate cylinder changing carriage 21 is moved from the front of the printing unit 1 to a predetermined position in the printing unit 1, as shown in FIG. When the plate cylinder shaft 6a thereon is lifted, it is possible to pass the plate cylinder bearing 13 above one of the bearings 16 as shown in FIG. 5 (b), and when it reaches a predetermined position past that position. As shown in FIG. 5C, the cam follower 33 can be lowered to transfer the plate cylinder shaft 6a onto the pair of bearings 16, and the plate cylinder exchange carriage 21 can be installed in the printing unit 1. Mark from a predetermined position When moved to the back of the unit 1, lifts the plate cylinder support member 30 via the cam follower 33, a pair of bearings 16 Ueno plate cylinder shaft 6
It is set so that a can be held, carried out to the outside of one bearing 16, and thereafter the plate cylinder support member 30 can be gradually lowered. The plate cylinder changing carriage 21 and the cam 35 constitute a plate cylinder changing device for attaching / detaching the plate cylinder 6 to / from the plate cylinder bearing 13 provided in the printing unit 1.

The plate cylinder changing carriage 21 has an inking applicator storage space 40 for carrying and carrying an inking applicator 11 and a finisher roller 9, a doctor storage space 42 for carrying a doctor 12, and a plate. A loading pin 44 for engaging a drive mechanism (not shown) on the side of the printing unit 1 when the cylinder changing carriage 21 is moved in and out of the printing unit 1, and a plate cylinder changing carriage 21 are provided outside the printing machine on the floor. Transport pins 46, 4 for hooking on a traction mechanism (not shown) provided in the
7 and the like are provided.

Next, the operation of the apparatus having the above structure will be described. During a normal printing operation, the plate cylinder changing carriage 21 is at a predetermined position in the printing unit 1 shown in FIGS. 2 and 3, and the plate cylinder 6 has its plate cylinder shaft 6a attached to a pair of bearings 16 of the plate cylinder bearing 13. It is held. At this time, the upper end of the plate cylinder support member 30 is slightly lower than the plate cylinder shaft 6a, and does not interfere with the rotation of the plate cylinder shaft 6a. In this state, the drive shaft 18 is connected to and driven by the plate cylinder shaft 6a, and the ink is supplied to the finisher roller 9 by the ink supply means such as the ink tank 27 and the ink pump 28 mounted on the plate cylinder exchange carriage 21. Ink is supplied and printing operation is performed.

After the printing is completed, when the plate cylinder 6 is replaced for changing the item, the coupling 19 is retracted to be removed from the plate cylinder shaft 6a, and the impression cylinder 7 is retracted upward. Further, the finisher roller 9 and the inking applicator 11
Is removed and placed on the inking applicator yard 40 of the plate cylinder changing carriage 21, and the doctor 12 is also removed and placed on the doctor yard 42. On the other hand, before or in parallel with these operations, the plate cylinder changing carriage 21 on which a new plate cylinder 6, an ink tank 27, an ink pump 28 and the like are placed is moved in front of the printing unit 1 and kept in standby. .

The plate cylinder is replaced when these plate cylinder replacement preparations are completed. That is, the plate cylinder changing carriage 21 located inside the printing unit 1 is sent to the outside of the printing unit 1 by the drive mechanism provided in the printing unit 1. During the movement of the plate cylinder changing carriage 21, the engagement between the cam 35 and the cam follower 33 causes the plate cylinder supporting member 30 provided on the plate cylinder changing carriage 21 to rise to lift the plate cylinder shaft 6a, and the pair of bearings 16 The plate cylinder shaft 6a is held and moved thereafter. On the other hand, in parallel with this operation, a new plate cylinder changing carriage 21 waiting in front of the printing unit 1 is pulled into the printing unit 1, and
As shown in (a), (b), and (c), the plate cylinder support member 3
When the plate cylinder shaft 6a supported by 0 is lifted and the plate cylinder changing carriage 21 is stopped at a predetermined position, it is transferred onto the pair of bearings 16. After that, the plate cylinder exchange cart 2
Dr. 12 and Furnisher Roller 9 mounted on 1
And the inking applicator 11 etc. to the printing unit 1
The printer is attached to a predetermined place of No. 1 to prepare for printing, and then the printing operation is started.

Thus, in this embodiment, the printing unit 1
The plate cylinder 6 can be replaced by simply ejecting the plate cylinder changing carriage 21 that has been stopped at a predetermined position and inserting a new plate cylinder changing carriage 21 into the printing unit 1. Further, since the plate cylinder changing carriage 21 can be put in and taken out almost at the same time, it can be carried out in an extremely short time. In addition,
The discharged plate cylinder exchanging cart is then sent to another processing station to wash the plate cylinder and the ink pan, and prepare for the next operation.

In the above embodiment, the plate cylinder exchange truck 21 is used.
However, the present invention is not limited to this configuration, and the used plate cylinder changing carriage 21 is discharged to the front or the rear of the printing unit 1 and a new plate cylinder changing carriage 21 is fed from the same side. May be placed in the printing unit 1. In this case, the cams 35 need not be provided on the left and right with respect to the center of the plate cylinder set in the printing unit 1, as shown in FIG. Further, in the above-described embodiment, the plate cylinder changing carriage 21 is moved in and out by the drive mechanism provided in the printing unit, but instead of this, the plate cylinder changing carriage may be moved in and out by a manual operation by the operator.

[0019]

As described above, according to the present invention, the plate cylinder supporting member supporting the plate cylinder is held by the plate cylinder exchanging carriage so that it can be moved up and down, and the plate cylinder exchanging carriage prints the plate cylinder supporting member. When moving in and out of the unit, it is configured to move up and down by the cam provided on the printing unit side,
The plate cylinder can be automatically attached / detached to / from the plate cylinder bearing provided in the printing unit by simply moving in / out the plate cylinder exchange cart.
Elevating means with a drive mechanism provided on the dolly is not required, which has the effect of simplifying the structure and reducing equipment costs.

Here, when the plate cylinder changing carriage is moved from the front side of the printing unit to a predetermined position in the printing unit and passes through from the predetermined position to the rear side of the printing unit, when the plate cylinder is changed, By ejecting the plate cylinder changing carriage in the printing unit to the rear side of the printing unit, the plate cylinder attached to the printing unit is taken out, and at the same time, another plate cylinder changing carriage waiting in front of the printing unit is removed. By moving the plate cylinder into the printing unit, a new plate cylinder can be attached to the printing unit, and the plate cylinder can be replaced in an extremely short time.

If the plate cylinder exchange truck is provided with the ink pan and the ink supply means, it is possible to replace not only the plate cylinder but the ink pan and the ink supply means at the same time.

[Brief description of the drawings]

FIG. 1 shows a printing unit of a gravure printing machine equipped with a plate cylinder changing device according to an embodiment of the present invention, in a state before a plate cylinder changing carriage is put in the printing unit and outside a side surface of the plate cylinder changing carriage. Schematic cross section cut at the position

FIG. 2 is a schematic cross-sectional view of the printing unit shown in FIG. 1 with the plate cylinder exchange carriage set at a predetermined position and cut at the center thereof.

FIG. 3 is a schematic front view of the printing unit shown in FIG.

FIG. 4 is a schematic perspective view showing a part of the plate cylinder changing carriage and a cam on the printing unit side in the above embodiment.

5A, 5B, and 5C are schematic diagrams illustrating the positional relationship between the cam 35 and the plate cylinder support member 30 when the plate cylinder replacement carriage is inserted into the printing unit.

[Explanation of symbols]

 1 Printing Unit 2 Side Frame 3 Web 4, 5 Guide Roller 6 Plate Cylinder 6a Plate Cylinder Shaft 7 Impression Cylinder 9 Finisher Roller 12 Doctor 13 Plate Cylinder Bearing 14 Support Platform 15 Bearing Support 16 Bearing 21 Plate Cylinder Exchange Cart 24 Cart 26 Ink pan 27 Ink tank 28 Ink pump 30 Plate cylinder support member 30a Recess 31 Support tube 33 Cam follower 35 Cam

Claims (3)

[Claims] 1. A plate cylinder exchanging device for attaching and detaching a plate cylinder to and from a plate cylinder bearing provided on a printing unit of a gravure printing machine so as to rotatably support lower surfaces of plate cylinder shafts at both ends of the plate cylinder. A plate cylinder supporting member capable of moving up and down with a plate cylinder mounted thereon, and a cam follower provided on a side surface of the plate cylinder supporting member,
A plate cylinder exchange carriage that is movable inside and outside the printing unit and in a direction perpendicular to the axis of the plate cylinder set in the printing unit, and along the movement path of the plate cylinder exchange carriage in the printing unit, And a cam provided so as to be able to engage with the cam follower, and when the shape of the cam moves the plate cylinder exchanging carriage to a predetermined position in the printing unit, the cam follows the cam follower. The plate cylinder support member is moved up and down, and the plate cylinder supported by the plate cylinder support member can be transferred to the plate cylinder bearing of the printing unit, and the plate cylinder replacement carriage is moved from a predetermined position inside the printing unit. The plate cylinder supporting member is moved up and down through the cam follower so that the plate cylinder supported by the plate cylinder bearing can be lifted and removed by the plate cylinder supporting member. To The plate cylinder exchange apparatus of gravure printing machine according to symptoms. 2. The plate cylinder exchanging carriage is configured to move from a front side of the printing unit to a predetermined position in the printing unit and pass from the predetermined position to a rear side of the printing unit. Item 1. The plate cylinder changing device of the gravure printing machine according to Item 1. 3. The plate cylinder changing device for a gravure printing machine according to claim 1, wherein the plate cylinder changing carriage is provided with an ink pan and an ink supplying means for supplying ink to the ink pan.