JPH02107443A - Method and apparatus for replacing of plate cylinder and plate cylinder placing base - Google Patents

Abstract

PURPOSE:To remove a plate cylinder and an ink pan from a printer in a short time by removing the cylinder and the pan in a state that the cylinder is placed on the pan at the time of replacement of the cylinder. CONSTITUTION:After the rotation of a plate cylinder 12 is stopped, a furnishing roller is retreated. The handle 82 of a truck 32 is rotated in this state to telescope a vertically movable shaft 56 into a supporting cylinder 54 to move down an ink pan 18. Here, a pair of plate cylinder placing bases 84 are placed on a side plate 18A, the handle 82 is operated again to raise the pan 18. After supporting rollers 92 disposed in the recesses 84C of the bases 84 are raised on the pan 18 up to the state in contact with the cylinder 12, tapered conical shafts 94 are separated from each other to remove from the tapered connecting hole 12A of the cylinder 12. Thus, the cylinder 12 is separated from a tapered conical shaft 94 to be placed on the pan 18 through the bases 84. The cylinder 12 is placed on the pan 18, and moved to a treating chamber by the truck 32.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method and apparatus for replacing a plate cylinder of a gravure printing press that applies ink in an ink pan to a web via a plate cylinder, and a plate cylinder i! ! Regarding the stand.

[Prior Art] In a gravure printing machine, the ink in the ink pan is brought out by a furnishing roller and applied to the printing line concave portion of the plate cylinder, and after the ink in the non-printing area is scraped off with a doctor, the printing line is removed. Printing is performed by applying the ink in the recesses to the web.

When replacing the plate cylinder in this gravure printing machine with a plate cylinder on which different image lines have been formed, a worker must scrape off ink that has adhered to the circumference and side surfaces of the plate cylinder after stopping the printing machine. The plate cylinder surface is washed with a solvent. The ink pan is then removed from the printing press, and the plate cylinder is removed from the printing press using a lift. In this state, a new plate cylinder is brought into the printing press by a lift and installed. After the lift is removed from the printing press, an ink pan is attached, oily content on the surface of the plate cylinder is removed using a cleanser, and ink is filled in the ink pan.

[Problems to be Solved] Such plate cylinder changing operations, especially plate cylinder cleaning operations, require a long time and are an impediment to improving the work efficiency of gravure printing. In particular, it takes time to clean the plate cylinder before removing it.

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to provide a plate cylinder exchange method, an apparatus, and a plate cylinder mounting table that enable rapid plate cylinder exchange.

[Means for Solving the Problems] The method according to the present application is a plate cylinder replacement method for a gravure printing machine in which ink in an ink pan is applied to a web via a plate cylinder, and the ink pan is disposed below the plate cylinder. In this state, the plate cylinder is removed from the printing press and held on the ink pan, and the plate cylinder and ink pan are replaced with a new ink pan prepared in advance and a plate cylinder placed on the new ink pan without cleaning the plate cylinder and ink pan. , the new plate cylinder is lifted from the ink pan and installed in the printing press.

Therefore, in the replacement method of the present invention, there is no need to remove ink adhering to the plate cylinder before removing the plate cylinder, and the plate cylinder and ink pan are both removed from the printing press with the plate cylinder placed on the ink pan immediately. Therefore, it can be removed in a short time.

The removed plate cylinder will undergo ink removal and cleaning work at another location, but a new ink pan that has already been prepared and s! Since the placed plate cylinder can be mounted on the printing press immediately after the previous plate cylinder has been removed, the plate cylinder can be replaced quickly and printing can be started immediately.

Further, the plate cylinder changing device according to the present application includes a truck for carrying and transporting the ink pan, and a lifting device provided on the truck for lifting and lowering the ink pan and the plate cylinder held above the truck.
It is characterized by having the following. Therefore, when the plate cylinder is held above the ink pan when replacing the plate cylinder, handling of the plate cylinder becomes significantly easier by raising and lowering the ink pan.

Further, the plate cylinder mounting table according to the present application is characterized in that it is provided with a mounting portion for the plate cylinder and supports the plate cylinder so as to be movable in the axial direction to the ink pan. - The plate cylinder is therefore placed on the ink pan via this plate cylinder mounting base and can be easily positioned in the axial direction.

[Embodiments of the Invention] FIG. 6 shows a plan view of a gravure printing machine P to which the present invention is applied and a printing factory R in which the same is installed. In the gravure printing machine P, there are a web unwinding section Wl and a web winding section W2.
A plurality of printing units M (seven in this embodiment) are installed between the printing units M and the web 16 (see FIG. 2) is sequentially conveyed to the printing units M in the direction of arrow A, thereby making it possible to print in multiple colors. ing.

FIG. 2 shows a sectional view of a printing unit (M) of a gravure printing machine P. In this printing unit M, a plate cylinder 12 and an impression cylinder 14 are pivotally supported by a printing press frame (not shown), and a web 16 passes between them.

An ink pan 18 is installed below the plate cylinder 12, and filled ink is taken out by a furnishing roller 24 and applied to the outer periphery of the plate cylinder 12. Therefore, ink is applied to the areas between the printing lines formed on the outer periphery of the plate cylinder 12. By rotating the plate cylinder 12 in the direction of arrow B, the doctor blade 26 removes ink from unnecessary portions, and then the ink in the print recesses is applied to the web 16.

The ink pan 18 is mounted on a truck 32.

As shown in FIGS. 1 and 4, this trolley 32 is made of angle members assembled into a rectangular frame shape, and wheels 36 are pivotally supported on brackets 34 protruding from both sides, making it movable. There is.

In addition, a part of the truck 32 has a vertical axis, and the fixing pin 3
8 is pivotally supported, and its lower end is biased upward in a normal state. However, by rotating the handle 42 protruding from the side of the trolley 32 by about 1/2 turn, the handle 42 can be removed.
A rotary wheel 44 connected to rotates a cam 46, so that the lower end of the fixing pin 38 protrudes from the bottom surface of the truck 32 and hits the floor, thereby stopping accidental movement of the truck 32.

A support tube 54 is attached to the support plate 48.52 which is hung over the trolley 32.
is fixed with its axis vertical, and an elevating shaft 56 is inserted. A frame plate 58 is fixed to the upper end of this elevating shaft 56, and a support base 62 and a support pan 18 fixed to this frame plate 58 are placed. This support stand 62
Both ends in the longitudinal direction of the ink pan 18 are inclined portions 62A bent upward by a slight amount to prevent the ink pan 18 from moving.

On the other hand, a rack 56A is carved in the middle of the lifting shaft 56, and meshes with the pinion 64.

A rotating shaft 66 fixed to the axis of the binion 64 is pivotally supported by a support plate 48,52 via a bracket 68, and a worm wheel 72 is fixed to one end.

This worm wheel 72 meshes with a worm gear 76 which is rotatably supported by a bearing 74 on the support plate 48 . An operating wheel 78 is fixed to the worm shaft 76A of the worm gear 76, and by rotating a handle 82 protruding from the operating wheel 78, the worm gear 76 rotates the rotating shaft 66, and the pinion 64 is rotated through the rack 56A. The elevating shaft 56 is moved up and down (in the direction of arrow C). This allows the ink pan 18 to be raised or lowered to any desired height by adjusting the amount of rotation of the handle 82.

The ink pan 18 is connected to the side plate 1 from the periphery as shown in FIG.
8A is in the shape of a dish standing upright, and its longitudinal direction (in the direction of the arrow) is arranged along the axis of the plate cylinder 12, as shown in FIG. ing.

A pair of plate cylinder mounting tables 84 are mounted on the side plates 18A along the longitudinal direction of the ink pan 18.

The longitudinal direction of these plate cylinder mounting tables 84 corresponds to the ink pan 1.
The side plate 18A is installed in the ink pan 18 so that the side plate 18A is inserted into the four portions 84A that are substantially perpendicular to the longitudinal direction of the ink pan 8 and formed near both ends in the longitudinal direction. A guide roller 86 is pivotally supported within this recess 84A.
By contacting the upper end of the side plate 18A, the plate cylinder mounting table 84 can be moved in the longitudinal direction of the ink pan 18 (in the direction indicated by the arrow). However, a set screw 88 is screwed into the end of the plate cylinder mounting table 84, and when the tip of the threaded portion is pressed against the outer surface of the side plate 18A, the plate cylinder is
The structure is such that movement of the ii stand 84 in the direction of the arrow can be restricted.

The upper part of the plate rI mounting table 84 is a receiving part 84B made of a flexible material such as rubber that is not immersed in ink, solvents in cleaning agents, oil, etc.
A recess 84C is formed in the center in the longitudinal direction, and serves as a support when the plate cylinder 12 is placed as shown in FIG. A pair of rubber support rollers 92 are pivotally supported on the bottom surface of the recess 84C, and their axes are parallel to the plate cylinder 12 on which they are placed. The plate cylinder 12 is installed on the plate cylinder mounting table 84 via this support roller 92.

Therefore, the mounted plate cylinder 12 can be easily rotated around the axis by the rotation of the support roller 92.

but. This support roller 92 may be omitted and the plate cylinder 12 may be placed directly on the receiving portion 84C.

As shown in FIG. 1, tapered connecting holes 12A are formed at both ends of the plate cylinder 12 in the axial direction, and tapered cone shafts 94 coaxially protruding from the printing press frame approach each other so that the tip end The taper cone 96 connects the taper connecting hole 1
2A, and the key 96A is fitted into the tapered connecting hole 12A.
The tapered cone shaft 94 and the plate cylinder 12 are connected to each other by coupling with the keyway 12B. These tapered cone shafts 94 are rotated at a speed equal to the conveying speed of the web 16 in response to the rotational force of a motor (not shown).

Next, the operation of this embodiment will be explained.

FIG. 2 shows the printing state, in which the plate cylinder 12 and the impression cylinder 14 are rotating while holding the web 16 between them, and the ink in the ink pan 18 is transferred to the plate cylinder 12 by the furnishing roller 24.
It is applied to the outer periphery of the

The plate cylinder 12 rotates in the direction of arrow B, and after unnecessary portions of ink are removed by a doctor blade 26, the ink is applied to the web 16.

The web 16 is sequentially sent to these printing units l-M in the direction of arrow A in FIG. 6, and different colors are printed on the web 16.

Next, the work of replacing the plate cylinder 12 will be explained. After the rotation of the plate cylinder 12 is stopped, the furnishing roller 24 is retracted from around the plate cylinder 12 using a guide device (not shown).

In this state, by rotating the handle 82 of the truck 32, the lifting shaft 56 is pulled into the support cylinder 54, and the ink pan 18 is lowered. Here, a pair of plate cylinder mounting tables 84 shown in FIG. 1 are placed on the side plate 18A, and the handle 82 is operated again to raise the ink pan 18. After the ink pan 18 is raised until the support roller 92 in the recess 84C of the plate cylinder mounting table 84 comes into contact with the plate cylinder 12, the tapered cone shafts 94 are separated from each other and pulled out from the taper connecting hole 12A of the plate cylinder 12. As a result, as shown in FIG. 1, the plate cylinder 12 is separated from the tapered cone shaft 94 and placed on the ink pan 18 via the plate cylinder mounting table 84.

Here, after lowering the ink pan 18 by a slight amount again, the handle 42 is rotated to release the fixation of the truck 32, and the truck 32 is moved in the direction of arrow F and pulled out between the printing units M.
Further, it moves in the direction of arrow G perpendicular to this, and is extracted from between a pair of adjacent printing units M, and further moves in the direction of arrow H, and is brought into the processing chamber 98.

In this way, the plate cylinder 12 is connected to the ink pan 18! Since the plate cylinder 12 is placed and moved to the processing chamber by the carriage 32, there is no need to remove ink adhering to the plate cylinder 12 when it is removed from the printing press, as is the case in the prior art. Also, like this, move the trolley 32 to arrow F.
Since it is necessary to move in the G and H directions, moderation means may be provided so that the wheels 36 can rotate about an axis perpendicular to the truck 32 every 90''.

Here, the new ink pan 18 is transferred to another truck 32 prepared in advance in the processing chamber 98, and the plate cylinder 12 is loaded onto this ink pan via the plate cylinder mounting table 84, and the other truck 32 is moved in the direction of the arrows HSG and F. and insert it into the printing unit. The new carriage and plate cylinder may be pulled out from the processing chamber 98 and placed on the side of the printing unit M before the replacement operation.

In this state, the handle 42 is operated to fix the carriage 32, and the handle 82 is rotated to raise the ink pan 18. Plate cylinder I2
The taper connecting hole 12A is moved to a coaxial position with the taper cone shaft 94 and stopped, and the pair of taper cone shafts 94 are brought closer to each other. As a result, the tapered cone 96 is inserted into the tapered connecting hole 12A. In this case, the key 96A of the taper cone 96 should be inserted into the keyway 1 accurately.
2B, the plate cylinder I2 is rotated around its axis on the support roller 92. In addition, in order to appropriately arrange the plate cylinder 12 between the pair of tapered cone shafts 94, the plate cylinder 12 is
It is necessary to move the plate cylinder mounting table 84 in the axial direction.
is mounted on the side plate 18A via the guide roller 86, so that the plate cylinder 12 can be easily moved in the axial direction.

After the taper cone shaft 94 and the plate cylinder 12 are connected, the handle 82 is rotated to lower the ink pan 18 by a predetermined amount. If the plate cylinder mounting table 84 is removed from the ink pan 18 and the ink pan 18 is filled with ink 22, the printing operation can be restarted.

On the other hand, the used plate cylinder 12 and ink pan 18 brought into the processing chamber 98 are subjected to post-processing operations such as ink removal, cleaning, and oil coating. Since this work is carried out after the new plate cylinder 12 and ink pan 18 have already been loaded into the printing press, there is no need to carry out the work while the printing press is stopped, and the operating efficiency of the printing press can be improved. - For example, in a gravure printing machine for seven-color printing equipped with seven printing units M, it takes about two hours including cleaning time to replace the plate cylinder in the printing unit, but in this example, this We were able to significantly shorten the time to approximately 40 minutes.

The plate cylinders of other printing units in this gravure printing machine P can also be replaced using the same procedure as described above.

In addition to having the upper part of the plate cylinder mounting table 84 constituted by the flexible receiving part 84B as in the embodiment, the plate cylinder mounting table 84 may have a material and a structure in which the contact portion with the plate cylinder is made of a material that does not damage the plate cylinder. Bye.

Further, this plate cylinder mounting base does not need to be supported to the ink pan through the side plate of the ink pan, but may be supported to the ink pan or the carriage through other parts, and the plate cylinder is placed on the ink pan and the plate cylinder is placed on the ink pan. Any material that allows the ink to fall into the ink pan will suffice.

[Effects of the Invention] Since the present invention has the above structure, it has an excellent effect that plate cylinders can be replaced quickly.

[Brief explanation of drawings]

Fig. 1 is a perspective view illustrating the plate cylinder exchange situation in gravure printing to which the present invention is applied, Fig. 2 is a side view showing the printing state as seen from the plate cylinder axis direction, and Fig. 3 is the exchange of Fig. 2. Fig. 4 is an exploded perspective view of the truck; Fig. 5 is an exploded perspective view of the ink pan and plate cylinder mounting base; Fig. 6 is a gravure printing machine to which the present invention is applied and its related parts. FIG. P... Gravure printing machine, M... Printing unit, l 2 ・ ・ 16 ・ ・ 1 8 ・ ・ 32 ・ ・ 56 ・ 56 A ・ 64 ・ ・ 72 ・ ・ 76 ・ ・ 78 ・ ・ 82 ・ ・ 84・ ・ 84B ・ ・Plate cylinder, ・Web, ・Ink pan, ・Dolly, ・Elevating shaft, ・Rack, ・Pinion, ・Wall foil, worm gear, ・Operation wheel, ・Handle, ・Plate cylinder i12 equipment, ・・Ukebe.

Claims (4)

[Claims] (1) A plate cylinder replacement method for a gravure printing machine in which ink in an ink pan is applied to a web via a plate cylinder, in which the plate cylinder is removed from the printing machine with the ink pan disposed below the plate cylinder, and the ink pan is replaced. Without cleaning this plate cylinder and ink pan, replace it with a new ink pan prepared in advance and the plate cylinder placed on this new ink pan, and lift this new plate cylinder from above the ink pan. A plate cylinder replacement method characterized by mounting it on a printing press. (2) Plate cylinder exchange according to claim (1), comprising: a cart for loading and transporting the ink pan; and a lifting device provided on the cart for lifting and lowering the ink pan and the plate cylinder held above the cart. Plate cylinder exchange device used in the method. (3) A plate cylinder mounting table used in the plate cylinder exchange method according to claim 1, which is provided with a mounting portion for the plate cylinder and supports the plate cylinder to an ink pan so as to be movable in the axial direction. (4) The plate cylinder mounting table according to claim 3, wherein the plate cylinder mounting portion includes a support roller that allows the plate cylinder to rotate around an axis in a mounted state.