JPS6234767Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an offset printing machine in which an etching plate can be easily attached and detached.

The etching liquid is drawn up and transferred by an etching liquid pumping roller whose peripheral surface is partially immersed in the etching liquid stored in the etching plate, an intermediate roller, and an etching roller, and the etching liquid is transferred to the plate cylinder by the etching roller. An offset printing machine is known in which the coating is supplied to an original plate wrapped around the paper.

Conventionally, the etching plate was built into the etching unit and secured with screws, and when cleaning the etching plate, the etching unit was first removed from the printing press body, and then
The etching plate itself was removed from the unit by removing the mounting screws, etc.

With such a configuration, if the unit itself is carelessly tilted when the etching unit is removed, the etching liquid will spill from the etching plate, staining the equipment at the bottom of the printing press, and damaging the plate supply/discharge section. This has the disadvantage that the etching solution corrodes the metal parts of the equipment and other equipment, or the etching solution solidifies on the moving parts, impairing operability.

The object of the present invention is to provide an offset printing machine that eliminates such drawbacks.

The present invention will be explained below with reference to illustrated embodiments.

In FIG. 1, the lower part of an etching liquid pumping roller 3 is immersed in the etching liquid 2 in the etching dish 1.
The etching liquid is carried on the etching roller 5 via the etching roller 5, and the etching liquid is supplied and coated onto the original plate M wound around the plate cylinder 6 with this carried liquid.

On the original feeding path below the etching plate 1, there is a pair of upper and lower plate feeding guide plates 7 and 8 that guide the original when the original is inserted from the direction of arrow A and fed toward the plate cylinder 6. It is arranged. As shown in FIG. 2, the upper plate feeding guide plate 7 has a plate-like configuration, and a pair of ribs 9, 9 are vertically provided inside the plate, parallel to the original plate feeding direction. An upwardly protruding mountain-like portion 9a is provided at the tip of the rib toward the plate cylinder 6.

A set plate 11 is provided on both side frames 7a of the plate feeding guide plate 7.
are screwed, and the plate feeding guide plate 7 is inserted from the left to the right in FIG.
The U-shaped notch 11a formed in the printing press side plate 12
By fitting the plate feeding guide plate 7 into the pin 13 implanted in the plate, rotating the set lever 14 from the position shown in FIG. 2 to the position shown in FIG. Set to immobile state. Note that a side plate 12 is provided on the upper edge of the side frame 7a.
The pin 15 implanted in the plate contacts the plate feeding guide plate 7.
is fixed so that it does not move vertically.

Note that a driven roller 17 that pairs with the original transport roller 16 on the drive side is rotatably assembled to the plate feeding guide plate 7, and the original guide roller 18 is similarly rotatably assembled to the plate feeding guide plate 7, and these rollers When removing the plate feeding guide plate 7, the plate feeding guide plate 7 can be pulled out to the right by rotating the set lever 14 counterclockwise in FIG. 1 and releasing the setting plate 11. It's summery. In short, the plate feeding guide plate 7 is detachably attached to the immovable side plates 12.

In FIGS. 1 and 2, the etching plate 1
An etching liquid replenishment tank support stand 1a is provided inside the etchant, on which a replenishment tank 19 is placed.
9b is adapted to be coupled to a receiver 1b on the bottom plate of the etching dish.

Pins 1c are installed on both sides of the etching plate 1, and guide members 2 are installed on both side plates 12.
1 is fixed thereto, and the guide member 21 is provided with a guide notch 21a as shown in the figure, to which the pin 1c can be freely engaged and detached, and for setting the etching plate. As shown in FIG. 1, the etching plate 1 has its tip abutted against the beveled edge 9a 1 of the mountain-shaped portion _9a of the rib 9, and the pin 1c falling into the recess 21a ₁ at one end of the guide notch 21a. It is set so that it does not move laterally.

To remove only the etching plate ₁ , from the set state shown in FIG. Then, while moving the pin 1c in the direction of the arrow along the guide notch 21a as shown in FIG. 3, the etching plate 1 is pulled out to the right. When the etching plate is removed in this manner, the etching plate is held in a substantially horizontal position during this time, so there is no risk of spilling the etching liquid in the etching plate.

Furthermore, when setting the etching plate, the above operation can be performed in reverse; in any case, the etching plate can be attached and detached with extremely small force; In the unlikely event that liquid spills, please use the Plate Feeding Guide Version 7.
Since it is dish-shaped, spilled liquid can be contained in that area, and there is no risk of contaminating the equipment below. Furthermore, in the present invention, only the etching plate can be attached and detached, so there is no need to take the trouble of attaching and detaching the etching unit system. Moreover, when taking out this unit system, it is sufficient to remove the etching plate in advance, and there is no need to pay any consideration to liquid spillage.

As described above, according to the present invention, it is possible to provide an offset printing machine in which the etching plate can be easily attached and detached without spilling the etching liquid.

[Brief explanation of the drawing]

FIG. 1 is a front view of an offset printing machine according to an embodiment of the present invention, and FIG. 2 is a perspective view of an etching plate and plate feeding guide plate provided in the offset printing machine.
FIG. 3 is a view showing the etching plate being pulled out along the plate feeding guide plate. 1... Etching plate, 1c... Pin, 2... Etching liquid, 3... Etching liquid drawing roller, 4... Intermediate roller, 5... Etching roller, 6... Plate cylinder, 7, 8... Plate feeding Guide plate, 9...
...rib, 9a... mountain-like part, 21a... guide notch,
M...Original version.

Claims (1)

[Scope of utility model registration request] An etching liquid is drawn up and moved by an etching liquid pumping roller whose peripheral surface is partially immersed in the etching liquid stored in the etching plate, an intermediate roller, and an etching roller, and the etching liquid is wound around the plate cylinder. and is disposed on the original plate feeding path below the etching plate, and guides the original plate when feeding the original plate toward the plate cylinder.
In an offset printing machine equipped with a pair of upper and lower plate feeding guide plates, the upper plate feeding guide plate is configured in the shape of a plate, and a rib parallel to the original plate feeding direction is vertically provided inside the plate. A mountain-shaped portion is formed at the tip facing the cylinder, and pins are installed on both rear sides of the etching plate, while guide notches for guiding the pins are immovable when the etching plate is inserted toward the plate cylinder. The rib is formed on a guide member provided on the member, and when the etching plate is inserted and removed in a substantially horizontal direction, the rib is used as a sliding guide surface, and when the etching plate is inserted toward the plate cylinder, An offset printing machine characterized in that the etching plate is placed in a set state by raising the tip of the etching plate by placing the tip against the mountain-shaped portion and engaging the pin with the inner end of the guide notch. .