JPH0336024B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (INDUSTRIAL APPLICATION FIELD) This invention relates to a cylinder type screen printing machine.

(Prior Art) The outline of the conventional cylinder type screen printing machine shown in FIG. 4 will be explained. The printing paper 3 stacked on an automatic paper feeder (not shown) is transferred one by one onto a feeding tape 44 by a suction device (not shown), passed through a printing machine feeding tape 45, and sent to a cylinder 48, and is sent to a paper receiver on the way. It is stopped by a temporary stop 51 on the plate 47.

The cylinder 48 is rotated forward and backward in the direction of the arrow A and the direction of the arrow B by the action of the driving means. A screen plate 49 installed above the cylinder 48 is reciprocated in the directions of arrows L and R as the cylinder 48 rotates forward and backward (the mechanism for providing reciprocating movement is omitted).

The cylinder 48 is rotated to a certain position in the direction of arrow B, and after the paper gripping claw 50 attached to the cylinder 48 grips the printing paper that is stopped at the temporary stop 51, it is rotated in the direction of arrow A.
At this time, the squeegee 52 is lowered and the screen plate 49 is moved in the direction of the arrow L. As the screen plate 49 moves, the squeegee 52 pushes out the ink 53 and the screen plate 49
Printing is performed on the surface of the printing paper 3 fed to the lower side. When printing is performed in this manner, the paper gripping claw 50 opens in front of the guide 54, and the printing paper 3 is ejected from the guide 54 onto the paper ejection tape 55.

At this time, the cylinder 48 is reversed in the direction of arrow B, and the screen plate 49 is moved back in the direction of arrow R. Further, as the screen plate 49 moves in the direction of the arrow R, the squeegee 52 is raised and the doctor 56 is lowered to return the ink 53 on the screen plate 49.

Thereafter, the cylinder 48 is again stopped at the fixed position in the direction of arrow B, and the same operation as described above is repeated to perform printing.

In the conventional configuration described above, the printing paper 3
To feed the printing paper 3 into the cylinder 48, as described above, the printing paper 3 sent by the printing press feed tape 45 of the printing machine is stopped at the temporary stop 51, and then the printing paper 3 is transferred to the cylinder 48.
The temporary stop 51 is immediately retracted upward by the operation of a drive mechanism (not shown), and the printing paper 3 advances under the temporary stop 51 in the direction of arrow A as the cylinder rotates. go.

However, the space between the cylinder 48 in which the paper receiving plate 47 and the temporary stop 51 are arranged and the screen plate 49 is very narrow, and the space between the screen plate 49 and the temporary stop 51 is sufficiently narrow to allow the temporary stop 5 to reach a position where the printing paper 3 does not hit.
I couldn't miss number 1.

On the other hand, if the printing paper is thick or made of hard vinyl, it will be stiff, so the paper gripping claw 5
0, the screen plate 49 and cylinder 48
The end of the printing paper fed between the two would spring up due to its elasticity. Since this splashing occurs in the very narrow space mentioned above, the printing paper that has jumped up is placed at the temporary stop 51.
It was inevitable that the printing paper would come into contact with the sharp tip of the printer, and the printing paper would be smeared and damaged. Therefore, it is difficult to print on a hard film or the like using a cylinder type screen printing machine, causing great inconvenience.

(Problems to be solved by the invention) This invention solves these conventional problems,
To provide a cylinder-type screen printing machine that does not damage or stain printing paper even when thick printing paper or printing paper made of a hard film is used.

Structure of the Invention (Means for Solving the Problems) In order to achieve the above-mentioned object, in this invention, the temporary stop of the screen printing machine is configured so that the space formed between the screen plate and the printing paper is A configuration is adopted in which the paper is evacuated to the printing paper introduction side.

(Example) Hereinafter, the present invention will be explained in detail using the example shown in FIGS. 1 to 3. As shown in FIG. 1, the screen plate 13 is stretched in the horizontal direction, and a squeegee 14 and a doctor 15 are disposed above it.

A cylinder 6 is pivotally supported by a machine frame (not shown) below the screen plate 13, and a gear 7 is mounted coaxially with the cylinder 6 so as to be rotatable therewith. A connecting rod 11 is interposed between a sector gear 8 supported on a shaft 8a so as to mesh with the gear 7 and one end of a crank lever 9 on a shaft 10 rotatably supported on the machine frame. The rotation of the crank lever 9 in conjunction with the rotation of the shaft 10 rotates the cylinder 6 alternately in the clockwise and counterclockwise directions through the meshing of the sector gear 8 and the gear 7. Note that the shaft 10 is a motor (not shown).
It is rotated by the drive of.

On the other hand, a paper gripper 16 is rotatably attached to the peripheral edge of the cylinder 6. Further, a temporary lever 20 is arranged between the screen plate 13 and the cylinder 6, and a temporary stop 17 formed at the tip of the temporary lever 20.
is close to cylinder 6. Temporary support plates 21 are attached to both sides of the temporary stop 17, and the temporary stop 17 is swingably supported by the support plates 21 at an intermediate portion thereof, and the support plate 21 is attached to the machine frame as shown in FIG. It is supported so that it can move in the left and right direction. A printing paper feed tape 5 is disposed below the temporary lever 20. A paper receiving plate 26 is arranged on the machine frame directly above the printing paper feeding tape 5 on the cylinder 6 side, and the printing paper positioned on this paper receiving plate 26 is positioned by the temporary stop 17. ing.

A temporary cam 25 is fixed to the shaft 10, and a cam follower 24 at one end of the first lever 23 rotatably supported by a shaft 33 at an intermediate portion is engaged with the temporary cam 25 by a spring 34. A rod 22 is interposed between the first lever 23 and the base end of the temporary lever 20.

A temporary retraction cam 3 is attached to the shaft 10.
2 is installed. A cam follower 31 is attached to the middle portion of the second lever 30, which is rotatably supported by a shaft 35 at the lower end. Above the second lever 30, a third lever 28 is rotatably supported at its intermediate portion by a shaft 36;
A link 29 is connected between the lower end and the upper end of the second lever 30. A link 27 is interposed between the upper end of the third lever 28 and the base end of the temporary support plate 21. The cam follower 31 is engaged with the temporary retraction cam 32 by the tensile force of a spring 37. In this embodiment, the temporary retraction cam 3
2. The second lever 30, the third lever 28, etc. constitute a retracting motion imparting means.

In FIG. 1, a discharge tape 12 is arranged on the left side of the cylinder 6.
is rotated by a motor (not shown) to send the printing paper 3 from above the cylinder 6 to the left. A guide plate 19 is arranged between the cylinder 6 and the discharge tape 12 and guides the printing paper 3 to the discharge tape 12.

Now, when the shaft 10 is rotated by the motor, the crank lever 9 is also rotated, and accordingly, the sector gear 8 is reciprocated within a certain range via the connecting rod 11, and the cylinder 6 is reciprocated through engagement with the gear 7. Rotated. Therefore, the printing paper 3 on the paper receiving plate 26 of the printing paper feed tape 5 is gripped by the paper gripping claw 16, and the ejection tape 12
The operation sent to is repeated.

Meanwhile, in synchronization with the paper feeding operation described above, the screen plate 13 is reciprocated in the direction of the arrow in FIG. It will be done.

Further, due to the action of the temporary cam 25 based on the rotation of the shaft 10, the first lever 23
and the temporary lever 20 via the rod 22.
is swung around its central axis, and when the cylinder 6 is rotated back as shown in FIG. 2, the temporary stop 17 is lowered to catch the printing paper 3, as shown in FIG. As shown in FIG.
It allows the printing paper 3 to move to the side, and also allows the printing paper 3 to move after being gripped by the paper gripping claws 16.

Then, due to the action of the temporary retraction cam 32 based on the rotation of the shaft 10, the second lever 30,
The temporary support plate 21 is reciprocated through the link 29, the third lever 28, and the link 27, and the temporary lever 20 moves forward and backward as shown by the solid line and the two-dot chain line in FIG. This timing is such that when the temporary stop 17 rises, it starts to retreat from the forward position and leaves the printing paper 3, and as the cylinder 6 rotates, the printing paper 3
When the paper slips out from below the temporary stop 17, the paper starts moving forward from the retracted position, and reaches the forward end just before the paper gripping pawl 16 returns to the gripping position.

Therefore, when the printing paper is being moved by the rotation of the cylinder 6, there is no temporary lever in the narrow space surrounded by the cylinder and the screen plate, and therefore there is nothing that could easily damage the printing paper. do not.

For this reason, even if the printing paper is thick or strong, such as hard vinyl film, the end of the printing paper will not hit the tip of the temporary stop, and the paper will gently warp in the wide space. Proceed on board 26. Therefore, the printing paper will not be stained or scratched.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, other driving means such as a solenoid or an air cylinder may be used as the retracting motion imparting means without departing from the spirit of the structure of the invention. Can be changed.

Effects of the Invention As exemplified in the embodiments above, according to the present invention, the temporary stop evacuates the narrow space between the printing paper and the screen not upward but to the rear, which is the introduction side of the printing paper, so that the printing paper does not touch the screen at all. The temporary stop can be placed in a position where the printer is not used, and even if the printing paper is thick or sturdy, it will not get dirty or damaged even if it jumps up, which is an excellent effect. .

[Brief explanation of drawings]

Fig. 1 is a sectional view of a cylinder type screen printing machine embodying the present invention, Figs. 2 and 3 are partial sectional views showing the operation of its main parts, and Fig. 4 is a conventional cylinder type screen printing machine. FIG. Printing paper...3, Cylinder...6, Screen plate...13, Paper gripper...16, Temporary stop...17, Temporary retraction cam...3
2. Second lever...30.

Claims (1)

[Claims] 1. A cylinder 6 having a paper gripping claw 16 on its outer periphery and reciprocally rotating around one axis; A cylinder 6 disposed above the cylinder 6;
a screen plate 13 that is reciprocated in one plane in synchronization with the rotation of the screen plate 13; and a temporary stop 17 that is disposed close to the cylinder 6 and below the screen plate 13 to temporarily stop the printing paper 3. The printing paper 3 temporarily stopped by the temporary stop 17 is gripped by the paper gripping claw 16, while the temporary stop 17 is retracted and gripped by interlocking retracting movement imparting means 32, 30, etc. In a cylinder-type screen printing machine that prints on a screen plate 13 while moving the printed printing paper 3 by rotation of a cylinder 6, the temporary stop 17 is placed between the screen plate 13 and the printing paper 3. A cylinder type screen printing machine characterized in that a space formed in the space is evacuated to the printing paper 3 introduction side.