JPH08174789A - Replacement device of impression cylinder of printing machine - Google Patents

Abstract

PURPOSE: To allow a plurality of impression cylinders to be stocked in a printing unit preliminarily, and enable a desired impression cylinder to be used at any time by providing an impression cylinder press device having a impression cylinder press cylinder, a chain driving device adapted to position the impression cylinder to be in an impression cylinder replacement position, and an impression stocker having an elevation table driving device. CONSTITUTION: As printing conditions of the printing machine are varied, and during the replacement of an impression cylinder, an impression cylinder processing cylinder machine 18 operates to move the press movable table 10 upward, lift the impression cylinder 3 retained by a chuck device 13 up to the position not to be in touch with the form cylinder 2, at the same time, by the rotation of an elevation motor 38, the elevation table 30 is lifted up, and by determining the distance between the support shafts 22, 23 arranged upward and downward as a predetermined value, a tension is given to an endless chain 20 spread thereover for the requirement in its traveling. Next, an air cylinder 16 operates to move the retaining pin 15 backward so as to release the retaining of the shaft 4. Herein, the impression cylinder driving motor 42 rotates in order for allowing the endless chain 20 to travel so that a desired impression cylinder 3 is moved to the impression cylinder replacement position in front of the chuck device 13, and then stopped therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impression cylinder exchanging device capable of exchanging an impression cylinder with a desired impression cylinder corresponding to a film width (printing width) in a rotary printing machine such as a gravure printing machine. .

[0002]

2. Description of the Related Art Conventionally, in a rotary printing machine such as a gravure printing machine, when the width of a film for printing is changed, the impression cylinder is also replaced with an impression cylinder having an effective length corresponding to the film width. . This exchange was usually performed manually by an operator.

[0003]

However, each time the impression cylinder is replaced, the impression cylinder is transported from the storage location to the printing machine and replaced.
Since the work of returning the used impression cylinder to the storage place is required, the work load on the operator is large, and particularly, depending on the weight of the impression cylinder, two people must replace the impression cylinder, resulting in a high work efficiency. There was a problem of being bad.

The present invention has been made in view of the above problems, and a plurality of impression cylinders are stocked in the printing unit in advance so that a desired impression cylinder can be used. An object is to provide a barrel changing device.

[0005]

In order to achieve the above object, the present invention holds both ends of an impression cylinder in a printing unit of a printing machine and presses the impression cylinder against a plate cylinder attached to the printing unit. An impression cylinder pressing device and an impression cylinder stocker that holds a plurality of impression cylinders and supplies a desired impression cylinder to the impression cylinder pressing device are provided. The impression cylinder pressing device is provided with a pair of pressure moving bases arranged so as to be located on both sides of the pressure cylinder, and a chuck device provided on the pair of pressure moving bases and capable of holding both ends of the pressure cylinder. And a pressurizing cylinder pressurizing cylinder mechanism connected to move the pressurizing moving base. Also,
The impression cylinder stocker has a pair of endless chains holding a plurality of impression cylinders in parallel with each other, and an impression cylinder exchange position at which the impression cylinder holding the pair of endless chains is attached to and detached from the chuck device. A plurality of support shafts supported so as to be able to travel along a path that passes through, a chain drive device for indexing and running the endless chain so as to position a desired impression cylinder at the impression cylinder replacement position, and at least above A structure having an elevator table that supports a supporting shaft located therein, and an elevator table drive device that lowers the elevator table so that tension is not generated in the endless chain when the impression cylinder pressing device presses the impression cylinder against the plate cylinder. And

Here, a plurality of support shafts for supporting the endless chain of the impression cylinder stocker is composed of a pair of support shafts arranged vertically, and the lower support shafts of the impression cylinder pressurizing device. It is preferably attached to the impression cylinder moving table.

[0007]

In the apparatus of the present invention having the above-mentioned structure, when the impression cylinder is replaced, the impression cylinder held by the impression cylinder pressurizing device is lifted to a position where it does not come into contact with the plate cylinder, and the lifting platform is also raised to endlessly move. Appropriate tension necessary for traveling is applied to the chain, and in that state, the holding of the impression cylinder by the chuck device is released, and then the chain drive device indexes and runs the endless chain to move the desired impression cylinder by the chuck device. It is positioned at the pressure cylinder exchange position to be detached and attached, and then the pressure cylinder is held by the chuck device. As a result, the impression cylinder is replaced. Next, when printing is performed using this impression cylinder, the lifting platform is lowered to loosen the endless chain, and at the same time, the cylinder mechanism for impression cylinder pressurization of the impression cylinder pressurizing device is operated, and the chuck device is used. Press the holding impression cylinder against the plate cylinder. At this time, the impression cylinder held by the chuck device is in a state of being held by the endless chain, but since the endless chain is in a loose state, tension of the endless chain is applied to the impression cylinder held by the chuck device. Does not act so much, and an appropriate pressing force is applied to the impression cylinder by the impression cylinder pressurizing cylinder mechanism, so that good printing can be performed.

Here, a plurality of support shafts for supporting the endless chain of the impression cylinder stocker is composed of a pair of support shafts arranged vertically, and the lower support shafts of the impression cylinder pressurizing device. If the structure is attached to the impression cylinder moving base, the traveling path of the endless chain can be compactly arranged as an elongated oval shape, and the impression cylinder replacement position for attaching and detaching the impression cylinder to the chuck device is possible. Can be set on the outer circumference of the chain wheel provided on the support shaft located below, the positioning accuracy of the impression cylinder with respect to the chuck device can be improved, and the impression cylinder can be held securely by the chuck device. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention shown in the drawings will be described below. 1 is a schematic cross-sectional view of a main part of a printing unit including an impression cylinder changing device according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the printing unit as seen in the direction of arrow XX in FIG.
FIG. 3 is a schematic cross-sectional view showing the same portion as in FIG. 2 during printing. 1 to 3, 1 is a side frame of a printing unit, 2 is a plate cylinder attached to the printing unit, 3 is an impression cylinder, and in this embodiment, a shaft 4 is rotatably held. Is used. 5 is an impression cylinder 3
Of both sides (strictly speaking, both ends of the shaft 4 of the impression cylinder 3) and presses the impression cylinder 3 against the plate cylinder 2,
Is an impression cylinder stocker that holds a plurality of impression cylinders 3 and supplies a desired impression cylinder 3 to the impression cylinder pressing device 5.

The impression cylinder pressurizing device 5 is provided with a pair of pressurization moving bases 10 arranged so as to be located on both sides of the impression cylinder.
The pressurizing movable table 10 is held by a linear guide 11 mounted on the side frame 1 substantially vertically. Thus, the pressure movable table 10 can be moved almost vertically. Each pressurizing moving table 10 is provided with a chuck device 13 capable of holding both ends of the impression cylinder 3 (strictly, both ends of the shaft 4 of the impression cylinder 3). This chuck device 13 is, as shown in FIG.
The hollow cylindrical guide metal 14 attached to the pressurization moving table 10, the holding pin 15 slidably held by the guide metal 14, and the holding pin 15 are shown in FIG.
The air cylinder 16 etc. which moves to the position shown in (b) are provided. The holding pin 15 has a tapered hole 15a at the tip thereof, into which the tapered cone portion 4a formed at the end of the shaft 4 of the impression cylinder 3 is fitted. Thus, while the holding pin 15 is retracted as shown in FIG. 4B, the holding pin 15 is separated from the shaft 4 of the impression cylinder 3, but when the holding pin 15 is moved forward by the air cylinder 16, As shown in FIG. 4 (a), the end of the shaft 4 fits into the tapered hole 15 a at the tip of the holding pin 15, and therefore the chuck device 13 causes the impression cylinder 3 to move.
Can hold.

1 to 3, an impression cylinder pressurizing cylinder mechanism (for example, an air cylinder) 18 is connected above each pressurizing movable base 10 so as to move the pressurizing movable base. Therefore, while the impression cylinder 3 is held by the chuck device 13, the pressurization moving table 1 is moved by the impression cylinder pressing cylinder mechanism 18.
By pressing 0 downward, the impression cylinder 3 held by the chuck device 13 can be pressed against the plate cylinder 2. Here, the force by which the impression cylinder pressurizing cylinder mechanism 18 pushes the pressurizing movable table 10 downward is naturally determined so that the impression cylinder 3 is pressed against the plate cylinder 2 with a desired pressing force necessary for printing. .

The impression cylinder stocker 7 includes a pair of endless chains 20 holding a plurality of impression cylinders 3 in parallel with each other, and two support shafts 22, 2 for supporting the pair of endless chains 20.
3, the support shafts 22 and 23 are provided with chain wheels 24 and 25 for hanging the endless chain 20. The two support shafts 22 and 23 are arranged vertically so that the endless chain 2
0 has a vertical oval shape, is compactly arranged, and can be accommodated in a narrow printing unit. The lower support shaft 23 is rotatably held by the pressurizing movable base 10 via a bearing block 27. The mounting position of the support shaft 23 with respect to the pressure moving base 10 is as shown in FIG.
A position where the shaft 4 of the impression cylinder 3 held by the endless chain 20 meshing with the lowermost part of the chain wheel 25 faces the holding pin 15 of the chuck device 13, that is, the impression cylinder 3 is detached by the chuck device 13. It is set to be the exchange position. Therefore, the upper and lower support shafts 22,
The endless chain 20 hung on the chain wheels 24 and 25 of the chuck 23 is held by the pressure drum 3 held by the chuck device 13.
It is possible to travel along a path that passes through an impression cylinder exchange position that is attached to and detached from. When the impression cylinder replacement position is set at the endless chain 20 meshing with the chain wheel 25 as in this embodiment, the position of the impression cylinder 3 is restricted by the chain wheel 25. This has the advantage that the position is accurate and that the shaft 4 of the impression cylinder 3 can be easily and reliably attached and detached by the chuck device 13.

1 to 3, the upper support shaft 22 is rotatably held by a lift table 30 via a bearing block 31. The elevating table 30 is held by a linear guide 34 that is attached substantially vertically to a support plate 33 fixed to the side frame 1, and is movable substantially vertically. An elevating table drive device 35 for elevating the elevating table 30 is attached to the support plate 33. This lifting platform driving device 35 includes a screw shaft 37 that meshes with a nut 36 attached to the lifting platform 30, a lifting motor 38 that rotationally drives the screw shaft 37, and a rotation stop position of the lifting motor 38 (hence, the lifting platform). An encoder 39 for setting the stop position 30) and the like, and as shown in FIG. 1 and FIG. When 3 is at a position apart from the plate cylinder 2 upward, the lifting platform 30 is raised to give the endless chain 20 an appropriate tension necessary for traveling, but as shown in FIG. When the pressure drum 3 is pushed down and the impression cylinder 3 is pressed against the plate cylinder 2, the lifting table 30 is lowered to control the endless chain 20 to be in a tension-free, slightly loosened state.

Further, the lifting table 30 includes an endless chain 20.
A chain drive device 41 for indexing and running the endless chain 20 is provided so as to position a desired impression cylinder among the plurality of impression cylinders 3 held at 1. The chain drive device 41 includes an impression cylinder indexing motor 42 and drive chain wheels 43 and 4 for transmitting the rotation of the impression cylinder indexing motor 42 to the support shaft 22.
4 and a drive chain 45, an encoder 46 for setting an indexing position, and the like.

FIGS. 5 and 6 show a structure for holding the impression cylinder 3 on the endless chain 20.
The support tool 51 is fixed to the link 50 of 0, and the shaft 4 of the impression cylinder is inserted and fixed to the support tool 51. 1 to 3, the plurality of impression cylinders 4 held by the endless chain 20 correspond to different printing conditions (for example, different effective widths).

Next, regarding the impression cylinder exchanging device having the above structure,
The operation will be described. When the impression cylinder is replaced due to a change in the printing conditions of the printing machine, the impression cylinder pressurizing cylinder mechanism 18 raises the pressurization moving table 10 as shown in FIGS. 1 and 2 and holds it by the chuck device 13. The pressure cylinder 3 is lifted to a position where it does not come into contact with the plate cylinder 2, and at the same time, the lifting motor 38 is rotated to lift the lifting platform 30, and the support shafts 2 arranged above and below are lifted.
An appropriate tension necessary for running is applied to the endless chain 20 hung on the interval of 2 and 23 as a predetermined value. Next, the air cylinder 16 of the chuck device 13 operates to retract the holding pin 15 and release the holding of the shaft 4 of the impression cylinder 3. In this state, the impression cylinder indexing motor 42 is rotated, the endless chuck 20 is caused to travel, and the desired impression cylinder 3 is moved.
It is moved to the impression cylinder exchange position located in front of the chuck device 13 and stopped there. Next, the chuck device 13
The air cylinder 16 operates to move the holding pin 15 forward to hold the shaft 4 of the impression cylinder 3. This completes the replacement of the impression cylinder.

At the time of printing, the cylinder mechanism 18 for pressurizing the impression cylinder lowers the pressurizing movable table 10, and the chuck device 13 is pressed.
As shown in FIG. 3, the impression cylinder 3 held in step 2 is pressed against the plate cylinder 2 with a predetermined pressing force. In parallel with this, the lifting / lowering motor 38 rotates to lower the lifting / lowering table 30, and the spacing between the support shafts 22 and 23 arranged vertically is made slightly shorter than that shown in FIG. Loosen the endless chain 20 present. As a result, the impression cylinder 3 pressed against the plate cylinder 2 is still held by the endless chain 20, but the endless chain 20 is in a loosened state. Is not applied to the impression cylinder 3, and an appropriate pressing force is applied to the impression cylinder 3 by the impression cylinder pressurizing cylinder mechanism 18, whereby good printing can be performed. Here, most of the weight of the impression cylinder stocker 7 is supported by the lift table 30, and the weight acting on the cylinder mechanism 18 for pressurizing the impression cylinder is determined by the pressure lift table 10 and the parts held by it (the impression cylinder 3). , The support shaft 23, etc.) is not so large. Therefore, it is not necessary to upsize the cylinder mechanism 18 for pressurizing the impression cylinder, and the impression cylinder 3
There is no problem in adjusting the pressing force applied to the plate cylinder 2.

As described above, in the above embodiment, the desired impression cylinder housed in the printing unit can be selected and automatically replaced, and the work burden on the operator can be greatly reduced. At the same time, the time required to replace the impression cylinder can be shortened. In particular, in a multi-color printing machine in which one printing machine has a plurality of printing units, it is possible to replace the impression cylinders of the printing units at the same time. It can be greatly shortened.

In the above embodiment, the endless chain 2
Two support shafts 22 and 23 arranged vertically are used as the support shafts for supporting 0, but the support shafts are not necessarily limited to two, and may be three or more. Further, in that case, the lower support shaft does not necessarily have to be held by the pressurizing movement base 10, and may be fixed in a fixed position. FIGS. 7 and 8 show an embodiment in that case, in which two support shafts 55 for hanging the endless chain 20 are provided at fixed positions (to prevent them from moving) on the support shafts 55. A roller 56 for guiding the endless chain 20 is attached. Other configurations are similar to those of the above-described embodiment. FIG.
In the embodiment shown in FIG. 8, as shown in FIG.
And when the support shaft 22 held by the same is lifted, the impression cylinder 3 held by the endless chain 20 which is horizontal between the two lower support shafts 55 is moved to the chuck device 13 (see FIG. 1). It becomes the impression cylinder exchange position to be attached to and detached from
After being held by the chuck device 13, as shown in FIG. 8, the elevating table 30 and the support shaft 22 held by it are lowered, and the impression cylinder 3 is moved by the impression cylinder pressurizing cylinder mechanism 18 (see FIG. 1). ), It is pressed against the plate cylinder 2 and printing is performed. In this embodiment, the two support shafts 55
Since only the impression cylinder 3 needs to be moved by the cylinder mechanism for pressurizing the impression cylinder, the weight applied to the cylinder mechanism for pressurizing the impression cylinder is small and the pressing force adjustment of the impression cylinder is further improved. To be

Further, in the above embodiment, the shaft 4 is used as the impression cylinder 3.
Although the one in which the shaft is rotatably held is used, an impression cylinder in which the shaft is fixed may be used. However, in that case, a bearing is provided on the shaft holding support 51 provided on the endless chain 20 to rotatably hold the shaft of the impression cylinder, and the holding pin 15 of the chuck device 13 is also rotatable. Must be configured. Further, the configuration of the chuck device 13 is not limited to the one using the fitting between the holding pin 15 and the shaft 4 as shown in the drawing, but may be a structure for gripping the shaft 4. Further, the pressure moving table 10 to which the chuck device 13 is attached is not limited to the linearly movable one shown in the illustrated embodiment, but may be a swingable arm type.

[0021]

As is apparent from the above description, according to the present invention, the printing unit of the printing machine is provided with the chuck device for holding both ends of the impression cylinder, and the impression cylinder is attached to the plate cylinder attached to the printing unit. It is housed in the printing unit by providing an impression cylinder pressurizing device for pressing the press cylinder and an endless chain holding a plurality of impression cylinders, and providing an impression cylinder stocker for supplying a desired impression cylinder to the impression cylinder pressing device. A desired impression cylinder can be selected and automatically replaced, the work load on the operator can be significantly reduced, and the time required for the replacement of the impression cylinder can be shortened. With a multi-color printing machine that has multiple printing units on one printing machine, it is possible to change the impression cylinders of each printing unit at the same time, significantly reducing the downtime of the printing machine for changing printing conditions. Has the effect of being able to

Here, a pair of endless chains provided on the impression cylinder stocker are supported by two upper and lower support shafts,
When the lower support shaft is attached to the impression cylinder moving base of the impression cylinder pressurizing device, the traveling path of the endless chain can be arranged in an elongated oval shape and can be compactly arranged. It is possible to set the impression cylinder replacement position for attaching and detaching with the chuck device on the outer circumference of the chain wheel provided on the support shaft located below, and it is possible to accurately position the impression cylinder with respect to the chuck device. ,
This has the effect that the chucking device of the impression cylinder can be reliably held.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a main part of a printing unit including an impression cylinder changing device according to an embodiment of the present invention.

2 is a schematic cross-sectional view of the printing unit shown in FIG. 1 as seen in the direction of arrow XX.

FIG. 3 is a schematic cross-sectional view showing the same portion as FIG. 2 during printing.

4A is a schematic cross-sectional view showing a state in which the shaft 4 of the impression cylinder is held by a chuck device 13. FIG. 4B is a schematic cross-sectional view showing a state in which the shaft 4 of the impression cylinder is released from the chuck device 13.

FIG. 5 is a schematic cross-sectional view showing a support provided on the endless chain.

6 is a schematic side view of the support shown in FIG.

FIG. 7 is a schematic sectional view of a portion similar to FIG. 2 showing another embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view showing the same portion as in FIG. 7 during printing.

[Explanation of symbols]

 1 side frame 2 plate cylinder 3 impression cylinder 4 axis 5 impression cylinder pressurizing device 7 impression cylinder stocker 10 pressurizing moving base 13 chuck device 20 endless chain 22, 23 support shafts 24, 25 chain wheel 30 lifting platform 33 support plate 35 Lift platform drive device 41 Chain drive device 50 Link 51 Support tool

Claims (2)

[Claims] 1. An impression cylinder pressing device for holding both ends of the impression cylinder and pressing the impression cylinder against a plate cylinder attached to a printing unit, the pair being arranged so as to be located on both sides of the impression cylinder. And a chuck device provided on each of the pair of pressure moving bases and capable of holding both ends of the pressure drum, and a cylinder mechanism for pressing the pressure drum connected to move the pressure moving base. An impression cylinder pressurizing device having, and an impression cylinder stocker for holding a plurality of impression cylinders and supplying a desired impression cylinder to the impression cylinder pressurizing device, wherein a pair of endless cylinders holding a plurality of impression cylinders in parallel with each other. -Shaped chain, and a plurality of support shafts that support the pair of endless chains so that they can travel along a path that passes through an impression cylinder replacement position where the impression cylinder that holds the chain is attached to and detached from the chuck device, Pre-position the desired impression cylinder in the impression cylinder replacement position. A chain drive device for indexing and running the endless chain, a lifting platform that supports at least a support shaft located above, and no tension is generated in the endless chain when the impression cylinder pressing device presses the impression cylinder against the plate cylinder. And an impression cylinder stocker having an elevator drive device for lowering the elevator as described above. 2. A plurality of support shafts for supporting the endless chain of the impression cylinder stocker comprises a pair of support shafts arranged vertically, the support shafts located below are the impression cylinders of the impression cylinder pressurizing device. The impression cylinder exchanging device for a printing press according to claim 1, wherein the impression cylinder exchanging device is attached to a movable table.