JPH0431864B2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Industrial Application Field) This invention relates to a cylinder type screen printing machine, and the present invention relates to a cylinder type screen printing machine, and the method includes cleaning the underside of the screen plate and removing dirt on the cylinder surface by removing the screen plate, etc. This invention relates to a paper ejecting device that has been improved so that it can be easily carried out without any trouble.

(Prior Art) First, the outline of the conventional cylinder-type screen printing machine shown in FIG. and positioned in front of it as shown in FIG. (The paper feed device and positioning device are omitted.) This cylinder 3 includes a sector gear 7 that swings via a connecting rod 6 as the crank 5 rotates, and a gear 8 attached to the end of the cylinder 3. Due to the engagement with the screws, the screws are rotated forward and backward in the direction of the arrow A or the direction of the arrow B. The screen plate 9 installed above the cylinder 3 is reciprocated in the directions of arrows L and R as the cylinder 3 rotates forward and backward. (The reciprocating mechanism is omitted.) In accordance with the synchronized reciprocating motion of the cylinder 3 and the screen plate 9, the cylinder 3 is rotated to a certain position in the direction of arrow B as shown in Fig. 2, and the screen plate 9 is attached to the cylinder 3. After the paper gripping claw 4 grips the printing paper F, it is reversed in the direction of arrow A. At this time, the squeegee 10 is lowered at the passing point of the paper-eating claw 4, pressurizes the screen plate 9 moving forward in the direction of the arrow L as shown in FIG. 2, and pushes out the ink on the screen plate 9. Printing is performed on the surface of the printing paper F fed into the lower side.

The cylinder 3 is rotated in the direction of arrow A, and the second
When the paper gripping claw 4 opens in front of the printing paper guide 11 as shown by the imaginary line in the figure, the printing paper F flows over the printing paper guide 11 as shown in FIG. The paper is placed on the paper ejection stand 12 and ejected. At this time, the cylinder 3 is rotated to a certain position in the direction of the arrow A as shown in FIG. After being moved forward to the position, it is moved back in the direction of the R arrow. Further, as the screen plate 9 moves in the direction of the arrow R, the squeegee 10 is raised and the doctor 13 is lowered to return the ink on the screen plate 9.

Thereafter, the cylinder 3 is rotated again to a certain position in the direction of arrow B, and printing is performed by repeating the same operation as described above.

(Problem to be Solved by the Invention) In the conventional example described above, cleaning the back side of the screen plate 9 and removing dirt from the surface of the cylinder 3 is performed over a long period of time by directly extending the hand or using a tool. was. However, when the screen plate 9 is in the position shown in FIGS. 2 and 3, the space S ₁ between it and the paper feed tape 2 and the space S 2 between it and the paper output table ₁₂ are relatively narrow. Since the work is difficult to perform, sufficient washing and removal is often not possible, and in the end, the screen plate 9 has to be removed and washing and removal is performed.

Therefore, when reattaching the screen plate 9, it is necessary to readjust the positioning and color matching at the beginning of printing, and the loss of working time has an effect on the reduction in working efficiency.

Therefore, an object of the present invention is to provide a cylinder-type screen printing machine that can easily clean the underside of the screen plate 9 and remove dirt from the surface of the cylinder 3, and can also make the entire device more compact. An object of the present invention is to provide a paper ejecting device for use in a paper discharge device.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention replaces the paper discharge table 12 installed on the paper discharge side of the cylinder 3 with the first belt table 14 fixed to the cylinder 3 side. , a second belt stand 15 rotatably connected to the side opposite to the cylinder 3 with respect to the first belt stand 14, and an endless belt disposed around both belt stands 14, 15, A means is adopted in which the first belt stand 14 is formed so that the conveyance distance is shorter than that of the second belt stand 15.

(Function) With the above configuration, when the second belt stand 15 is retracted downward, the space S ₂ below the screen plate 9 becomes largely vacant.

Furthermore, since the first belt stand 14 is fixed, the endless belt loosens when the second belt stand 15 is rotated and retracted downward.

(Example) Below, examples embodying this invention are shown in Figures 4 to 4.
This will be explained according to FIG.

In this embodiment, in order to retract the paper ejection tray 12, the belt holder of the paper ejection tray 12 is placed close to the cylinder 3 so that the first belt tray 1, which has a short conveyance distance during sheet ejection,
4 and a second belt stand 15 which has a long conveyance distance, and the second belt stand 15 is connected to the first belt stand 14 by a belt number 16, and as shown in FIG. At times, a pin 17 provided at the tip of the second belt stand 15 is supported by a paper discharge stand receiving lever 18. Further, an endless belt is provided around the first belt stand 14 and the second belt stand 15.
As shown in FIGS. 4 and 6, when the second belt stand 15 is bent downward, the space _S2 below the screen plate 9 becomes large, so that the lower side of the screen plate 9 can be easily approached. It becomes possible to easily clean the lower side of the screen plate 9 and remove dirt from the surface of the cylinder 3, which has the effect of greatly contributing to improving work efficiency.

Further, since the first belt stand 14 is fixed, the endless belt loosens when the second belt stand 15 is bent downward, so that the endless belt can be easily replaced in this bent state.

Furthermore, since the entire sheet discharge table 12 is not retractable from directly below the screen plate 9, and only the second belt table 15 can be bent, the first belt table 14 and the like can be folded to the extent that the screen plate 9 can be cleaned, etc. It becomes possible to determine the length ratio with the second belt stand 15. Therefore, there is no need to take up a large space below the paper ejection table 12, which helps to make the entire apparatus more compact.

In the drawings, parts that are the same as those in the prior art are designated by the same numbers as in the prior art, and explanations thereof are omitted.

(Effects of the Invention) As described in detail above, according to the present invention, the second belt stand of the sheet discharging device is rotatable and can be retracted downward from directly below the cylinder plate. You can easily clean the cylinder and remove dirt from the cylinder surface.

In addition, since the paper output tray 12 is configured by a combination of the fixed first belt tray and the rotatable second belt tray, when the second belt tray is rotated downward, the endless belt loosens and this The endless belt can be easily replaced in any condition.

Furthermore, since the entire paper output tray is not retractable from directly below the screen plate, and only the second belt base can be rotated, there is no need to take up a large space below the paper output tray, and the entire device can be made more compact. It has excellent effects.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a conventional cylinder type screen printing machine, Figs. 2 and 3 are partially enlarged views showing its operating state, and Fig. 4 is a cylinder type screen printing machine equipped with a paper discharge device according to the present invention. FIG. 5 is a partially enlarged view showing the state of the paper discharging device of the present invention during operation, and FIG. 6 is a partially enlarged view showing the state of the paper discharging device of the present invention during cleaning and removal. Cylinder...3, Screen plate...9, Paper output stand...12, First belt stand...14, Second belt stand...15, Speech number...16, Paper output stand support lever...
...18. Space...S ₂ .

Claims (1)

[Claims] 1. A screen plate 9 is provided above the cylinder 3 that moves back and forth with the rotation of the cylinder 3 that feeds the printing paper F, and a screen plate 9 is provided below the screen plate 9 in synchronization with the back and forth movement of the screen plate 9. In a cylinder-type screen printing machine that presses a screen plate 9 to print on the fed printing paper F, a paper discharge table 12 installed on the paper discharge side of the cylinder 3 is used.
, the first belt stand 1 fixed to the cylinder 3 side
4, and the cylinder 3 opposite to the first belt stand 14
a second belt stand 15 rotatably connected to the side;
an endless belt circumferentially disposed around both belt stands 14 and 15, and the first belt stand 14 is connected to a second belt stand.
A paper discharge device for a cylinder type screen printing machine, characterized in that it is formed so that the conveyance distance is shorter than that of the belt stand 15.