JPH08281904A - Impressor changing device for printing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device capable of automatically replacing an impression cylinder. [Structure] Above a plate cylinder 2 in a printing unit, an impression cylinder stocker 7 including an endless chain 20 holding a plurality of impression cylinders 4 and sprockets 24, 25 holding the same is provided, and the chain travels. The desired impression cylinder can be positioned at the bottom by means of the pressure cylinder 3 located at the bottom.
Can be held by the chuck devices 13 of the pressure moving table 10 provided on both sides thereof, and the pressure moving table 10 is lowered by the cylinder mechanism 18 for pressure cylinder pressing to press the impression cylinder 3 against the plate cylinder 2. At the same time, the movable sprocket 32a provided at the intermediate position is horizontally moved to loosen the endless chain 20 so that the pressing of the impression cylinder 3 against the plate cylinder 2 is not interfered with.

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 sprockets supported so as to be able to travel along a passing path, a chain drive device for indexing and traveling the endless chain so as to position a desired impression cylinder at the impression cylinder replacement position, and the endless chain. A moving sprocket movably provided to apply tension to the sprocket, and a sprocket moving for moving the moving sprocket so as to loosen the endless chain when the impression cylinder pressing device presses the impression cylinder against the plate cylinder. And a mechanism.

Here, one of the plurality of sprockets supporting the endless chain of the impression cylinder stocker is attached to the impression cylinder moving base of the impression cylinder pressurizing device so as to move together with the impression cylinder moving base. It is preferable to configure the above.

[0007]

In the apparatus of the present invention having the above structure, when the impression cylinder is replaced, the impression cylinder held by the impression cylinder pressing device is lifted to a position where it does not contact the plate cylinder, and the sprocket moving mechanism moves the moving sprocket. The endless chain is moved and applied with an appropriate tension necessary for traveling, 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. Then, the chuck is positioned by the chuck device at a pressure cylinder exchange position, and then the chuck device holds the pressure cylinder. As a result, the impression cylinder is replaced. Next, when printing is performed using this impression cylinder, the sprocket moving mechanism moves the moving sprocket to loosen the endless chain, and at the same time, activates the cylinder mechanism for pressing the impression cylinder of the impression cylinder pressing device. , Press the impression cylinder held by the chuck device against the plate cylinder. 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 acts on the impression cylinder held by the chuck device. In this case, an appropriate pressing force is applied to the impression cylinder by the cylinder mechanism for pressurizing the impression cylinder, and good printing can be performed.

Here, if one of the plurality of sprockets supporting the endless chain of the impression cylinder stocker is attached to the impression cylinder moving base of the impression cylinder pressurizing device,
It is possible to set the impression cylinder replacement position for attaching and detaching the impression cylinder to the chuck device on the outer circumference of the sprocket attached to the impression cylinder moving table, and improve the positioning accuracy of the impression cylinder with respect to the chuck device. Therefore, the chucking device can securely hold the impression cylinder.

[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 has a pair of endless chains 20 holding a plurality of impression cylinders 3 in parallel with each other, two support shafts 22 and 23 arranged in parallel in the vertical direction, and these support shafts 22. , 23, and includes sprockets 24, 25, etc. for supporting the pair of endless chains 20. The two support shafts 22 and 23 are arranged vertically so that the entire endless chain 20 is vertically compactly arranged and can be accommodated in a narrow printing unit. The upper support shaft 22 is attached to the side frame 1 so as to rotate at a fixed position.

On the other hand, the lower support shaft 23 is used for the pressure moving table 10.
Is rotatably held by a bearing block 27. As can be seen from FIG. 4, the mounting position of the support shaft 23 with respect to the pressure moving base 10 is such that the shaft 4 of the impression cylinder 3 held by the endless chain 20 meshing with the lowermost part of the sprocket 25 is the chuck device 13. Of the pressure drum 3, that is, the pressure drum replacement position where the pressure drum 3 is attached and detached by the chuck device 13.
Therefore, the sprocket 24 of the upper and lower support shafts 22, 23,
The endless chain 20 hung around 25 can travel along a path through which the held impression cylinder 3 passes through the impression cylinder replacement position where it is attached to and detached from the chuck device 13. If the impression cylinder replacement position is set at the endless chain 20 meshing with the sprocket 25 as in this embodiment,
Since the position of the impression cylinder 3 is regulated by the sprocket 25, the position is accurate, and there is an advantage 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, a sub-frame 30 is provided outside the pair of endless chains 20 to form a side frame 1.
The four intermediate sprockets 31 that guide the endless chain 20 are rotatably attached to the subframe 30 at fixed positions.
Further, as can be seen from FIGS. 2 and 3, between the upper and lower intermediate sprockets 31, a movable sprocket 32a that can move horizontally to apply tension to the endless chain 20,
32b is arranged.

FIG. 5 shows the moving sprockets 32a, 32.
It is a schematic plan sectional drawing which shows the sprocket moving mechanism for moving b. The movable sprockets 32a, 32b are rotatably held by sprocket shafts 33a, 33b, and both ends of the sprocket shafts 33a, 33b are attached to chain moving nuts 34a, 34b. The chain moving nuts 34a, 34b are provided with screws 35a, 35 at both ends of a chain moving screw shaft 35 provided horizontally and in parallel with the side frame 1, respectively.
It meshes with b. The screws 35a and 35b are screws in opposite directions. Therefore, when the chain moving screw shaft 35 rotates in one direction, the chain moving nuts 34a and 34b meshed with the screws 35a and 35b at both ends thereof and the chain moving nuts 34a and 34b held by the nuts are retained. Moving sprocket 32a, 32
When b moves away from each other and the chain moving screw shaft 35 rotates in the opposite direction, the moving sprocket 32
a and 32b move toward each other. One end of the chain moving screw shaft 35 is drivingly connected to a driving shaft 37 via a driving gear 36, and a sprocket moving motor 38 and a moving position setting encoder 39 are connected to the driving shaft 37. . Thus, as the sprocket moving motor 38 rotates the drive shaft 37, as shown in FIG.
As shown in FIG. 3, left and right moving sprockets 32a, 3
It is possible to widen or narrow the interval of 2b.

Here, the sprocket moving motor 38 is
In response to a signal from the moving position setting encoder 39, FIG.
As shown in FIG. 2, when the impression cylinder 3 held by the chuck device 13 (see FIG. 1) is in the standby position separated from the plate cylinder 2 upward, the space between the left and right moving sprockets 32a, 32b is widened to form an endless shape. Appropriate tension necessary for traveling is applied to the chain 20, but as shown in FIG. 3, when the impression cylinder 3 is pressed against the plate cylinder 2, left and right moving sprockets 32a,
The endless chain 20 is controlled so as to be in a slightly loosened state without tension by narrowing the interval of 32b. Therefore, these sprocket moving motors 3
8, the drive shaft 37, the chain moving screw shaft 35, and the like constitute a sprocket moving mechanism that moves the movable sprocket so as to loosen the endless chain when the impression cylinder pressing device presses the impression cylinder against the plate cylinder. are doing.

In FIG. 1, above the side frame 1, the endless chain is positioned so that a desired one of the plurality of impression cylinders 3 held by the endless chain 20 is positioned at the impression cylinder replacement position. A chain drive device 41 for indexing and traveling 20 is provided. The chain drive device 41 includes an impression cylinder indexing motor 42, drive sprockets 43 and 44 for transmitting rotation of the impression cylinder indexing motor 42 to the support shaft 22, and a drive chain 45.
An encoder 46 for setting the index position and the like are provided.

FIGS. 6 and 7 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 impression cylinder 3 being lifted to a position where it does not contact the plate cylinder 2, and at the same time the sprocket moving motor 38
Rotates to spread the left and right moving sprockets 32a, 32b to the left and right, and to give the endless chain 20 an appropriate tension necessary for traveling. Next, the air cylinder 16 of the chuck device 13 is activated to retract the holding pin 15, and the shaft 4 of the impression cylinder 3 is moved.
Release the hold. In this state, the impression cylinder indexing motor 4
2 rotates to move the endless chuck 20 to move the desired impression cylinder 3 to the impression cylinder exchange position located in front of the chuck device 13 and stop at that position. Next, the air cylinder 16 of the chuck device 13 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 sprocket moving motor 38 rotates in the opposite direction to narrow the left and right moving sprockets 32a, 32b and loosen the endless chain 20. 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 the sprocket 24 attached to the upper support shaft 22, the intermediate sprocket 31, the moving sprocket 32.
Since it is supported by a, 32b, etc., and the weight acting on the cylinder mechanism 18 for pressurizing the impression cylinder is only the pressurizing platform 10 and the parts (the impression cylinder 3, the support shaft 23, etc.) held by it, it is not so much. It is not so large that there is no need to upsize the cylinder mechanism 18 for pressurizing the impression cylinder, and the plate cylinder 2 of the impression cylinder 3 is not required.
There is no problem in adjusting the pressing force against.

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 load 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
2 sprocket to support 0
Sprocket 24 held by book support shafts 22, 23,
25, the intermediate sprocket 31 and the like are used, but the disposition and the number of these sprockets are not limited to those shown in the drawings, and can be changed as appropriate. Further, in the above-described embodiment, the lower sprocket 25 is attached to the pressure moving base 10 and moved together with the pressure moving base 10, but this can also be changed. FIG. 8 and FIG. 9 show an embodiment in that case, and two sprockets 55 for hanging the endless chain 20 are rotatably provided at fixed positions below. Other configurations are similar to those of the above-described embodiment. In the embodiment shown in FIGS. 8 and 9, when the left and right moving sprockets 32a and 32b are expanded, the endless chain 20 that is horizontal between the lower two sprockets 55 is provided as shown in FIG. As shown in FIG. 9, after the held impression cylinder 3 is at the impression cylinder exchange position where it is attached to and detached from the chuck device 13 (see FIG. 1) and is held by the chuck device 13, the left and right moving sprockets 32a and 32b are moved. Is narrowed, and the impression cylinder 3 is pressed against the plate cylinder 2 by the impression cylinder pressurizing cylinder mechanism 18 (see FIG. 1) to perform printing. In this embodiment, since the two sprockets 55 are not moved and only the impression cylinder 3 is 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 It is possible to obtain the advantage that the adjustment of the pressing force is further improved.

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.

[0024]

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

If one sprocket for guiding a pair of endless chains provided on the impression cylinder stocker is attached to the impression cylinder moving table of the impression cylinder pressurizing device, the impression cylinder is chucked. It is possible to set the impression cylinder replacement position on the outer circumference of the sprocket for attachment and detachment with the device, to accurately position the impression cylinder with respect to the chuck device, and to securely hold the impression cylinder by the chuck device. It has the effect that it can be done.

[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.

5 is a schematic cross-sectional view of the intermediate sprocket, the moving sprocket, the holding mechanism thereof, and the like in the above embodiment, as viewed in the direction of arrow YY in FIG.

FIG. 6 is a schematic cross-sectional view showing a support provided on the endless chain.

FIG. 7 is a schematic side view of the support shown in FIG.

FIG. 8 is a schematic sectional view of a portion similar to FIG. 2 showing another embodiment of the present invention.

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

[Explanation of symbols]

 1 side frame 2 plate cylinder 3 impression cylinder 5 impression cylinder pressurizing device 7 impression cylinder stocker 10 pressure moving stand 13 chuck device 20 endless chain 24, 25 sprocket 31 intermediate sprocket 32a, 32b moving sprocket 33a, 33b sprocket shaft 34a, 34b Chain moving nut 35 Chain moving screw shaft 37 Drive shaft 38 Sprocket moving motor 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. Desired chain, and a plurality of sprockets supporting the pair of endless chains so that the pressure cylinder holding the chain can travel along a path passing through a pressure cylinder exchange position that is attached to and detached from the chuck device. Position the impression cylinder at the impression cylinder replacement position. A chain drive device for indexing and running the endless chain, a movable sprocket movably provided to apply tension to the endless chain, and the impression cylinder pressing device presses the impression cylinder against the plate cylinder. An impression cylinder stocker having a sprocket moving mechanism for moving the moving sprocket so as to loosen the endless chain, and an impression cylinder changing device for a printing press. 2. A structure in which one of a plurality of sprockets supporting an endless chain of the impression cylinder stocker is attached to an impression cylinder moving base of the impression cylinder pressurizing device and moves integrally with the impression cylinder moving base. Claim 1 characterized in that
An impression cylinder exchange device for the printing machine described.