JPH031252Y2 - - 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 is particularly designed to print thick printing paper made of cardboard or hard vinyl used in package printing, etc. This invention relates to a paper ejecting device that allows for smooth paper ejection.

(Prior Art) A conventional cylinder type screen printing machine is configured as follows. As shown in FIGS. 4 and 5, printing paper 3 is placed in a stacked state in an automatic paper feeder 2 adjacent to a printing press main body 1, and a suction plate (not shown) The side sheets are taken out one by one in order and sent to the cylinder 6 side via the feed tape 4 and the feed belt 5. The cylinder 6 is rotatably supported by a frame 40, and a gear 6a is attached to an end thereof, and this gear 6a is meshed with a sector gear 9. The sector gear 9 is connected to a crank lever 8 via a rod 51, and the crank lever 8 is fixed on a shaft 7 rotated by a drive motor (not shown).
Then, as the shaft 7 rotates, the sector gear 9
By swinging, the cylinder 6 is rotated forward and backward within a predetermined angle range.

Above the cylinder 6, a screen plate 10 which can be horizontally moved back and forth is arranged close to the cylinder 6.
It is reciprocated in the directions of arrows L and R as it rotates forward and backward. Above this screen version 10 is a squeegee 1.
3 and a doctor 16 are supported so that they can be raised and lowered alternately. Further, the cylinder 6 is provided with a paper gripping claw 11 capable of gripping and releasing the front edge of the printing paper 3. In the figure, reference numeral 12 denotes a temporary stop that engages with the front edge of the printing paper 3 to temporarily stop the printing paper 3.

Then, the cylinder 6 is rotated to a certain position in the direction of arrow B by the drive mechanism in accordance with the synchronized reciprocating motion of the cylinder 6 and the screen plate 10. The paper gripping claw 11 grips the printing paper 3 released from the temporary stop 12. Next, cylinder 6
When the screen plate 10 is reversed in the direction of the arrow A, the screen plate 10 is simultaneously moved in the direction of the arrow L, and the ink 14 on the screen plate 10 is pushed out by the squeegee 13 lowered onto the screen plate 10. Printing is performed on the surface of the printing paper 3 that is carried in to the lower side. Then, the cylinder 6 is A
When the paper gripper 11 further rotates in the direction of the arrow and reaches the position shown by the chain line in FIG. 5, the paper gripper 11 is opened and releases the front edge of the printing paper 3. Next, the printing paper 3 is guided by the guide 15 and placed on the paper discharge stand 50, and is carried out to the outside as the carrying-out tape 50a rotates.

Also, when the rear end of the printing paper 3 passes the contact point between the cylinder 6 and the screen plate 10, the cylinder 6
is reversed in the direction of the arrow B, and the screen plate 10 is moved in the direction of the arrow R, and the screen plate 1
The ink 14 on the screen plate 10 is returned to the printing start position by the doctor 16 that has been lowered onto the screen. These operations are repeated to enable continuous printing.

However, in the conventional cylinder type screen printing machine configured as described above, the cylinder 6
Since the delivery angle of the printing paper 3 from the paper tray 50 is steep, the front edge of the printing paper 3 released from the paper gripping claw 11 may be placed on the guide 15 when using stiff printing paper 3 such as cardboard or hard vinyl. The printing paper 3 was not guided smoothly when it came into contact with the upper surface, which sometimes caused problems in printing at the rear end of the printing paper 3.

In addition, since the cylinder 6 and the screen plate 10 are normally arranged within the machine frame of the printing press main body 1, cleaning the back side of the screen plate 10 and removing dirt on the surface of the cylinder 6 is performed from below the screen plate 10 from behind. It must be done by reaching out directly or using an instrument. However, in the conventional apparatus, the paper delivery tray 50 extends for a considerable length from front to back, and the paper delivery tray 50
Since the space between the screen plate 10 and the screen plate 10 is relatively narrow, the work is often difficult and sufficient cleaning cannot be performed, and in the end, the screen plate 10 has to be removed and cleaned.

Therefore, when reattaching the screen plate 10, it is necessary to readjust its positioning and color matching during printing, and the loss of working time has an adverse effect on working efficiency.

(Problems to be solved by the invention) This invention was made in order to solve the above-mentioned problems, and its purpose is to be able to smoothly eject thick printing paper, and to An object of the present invention is to provide a paper ejecting device for a new cylinder type screen printing machine that can easily perform operations such as washing or cleaning of screen plates and cylinders using the above mechanism.

Structure of the invention (means for solving the problem) As a means to solve the above problem, in this invention, a structure is installed on the paper ejection side of the cylinder from near the contact point between the cylinder and the screen plate along the paper ejection direction. arranging a first paper ejection member extending along the
A second paper discharging member extending along the paper discharging direction is installed at a position subsequent to the first paper discharging member, and the second paper discharging member
The paper ejection member is supported by the frame 2 so as to be movable between a use position away from the cylinder and a non-use position close to the cylinder.

(Function) The printing paper 3 that has passed through the contact point between the cylinder 6 and the screen plate 10 is led out in a nearly flat state by the first paper discharge member 17, and then transferred to the second paper discharge member 18.
It is smoothly discharged to the outside. Further, when cleaning the cylinder 6 and the screen plate 10, if the second paper ejection member 18 is placed in the non-use position, the paper ejection side of the cylinder 6 is largely freed.

(Example) An example embodying this invention will be described below with reference to FIGS. 1 and 2.

The cylinder type screen paper discharge machine of this embodiment includes a paper discharge tape 17 as a first paper discharge member and a paper discharge base 18 as a second paper discharge member in place of the paper discharge tray 50 in the conventional device described above. It is provided.
Note that the configuration other than these changed parts is the same as the conventional one, so the same numbers are attached to the drawings and the explanation thereof will be omitted.

As shown in FIG. 1, a paper discharge tape 17 is disposed obliquely near the contact point between the cylinder 6 and the screen plate 10 on the paper discharge side of the cylinder 6 so as to extend toward the lower rear along the tangential direction of the cylinder 6. A printing paper guide 15 is attached between the starting end of the paper discharge tape 17 and the cylinder 6.
The paper discharge tape 17 is formed by hanging a plurality of tapes 21 in the width direction between a pair of front and rear rotating shafts 20.
The tape gears 22 provided at both ends of the rotating shaft 20 on the cylinder 6 side are connected to gears 42 of the same diameter fixed to both sides of the cylinder 6 via intermediate gears 19.
is engaged with. Then, the paper discharge tape 17
is always rotated in the same direction as the rotation direction of the cylinder 6, and when the cylinder 6 is rotated in the direction of arrow A, the upper part of the discharge tape 17 is moved in the direction of arrow C, and the tape 21 is moved against the printing paper 3. It is designed to apply a feeding force in the unloading direction. Furthermore, when one printing operation is completed and the cylinder 6 is rotated in the direction of the arrow, the upper part of the paper ejection tape 17 is moved in the opposite direction of the arrow C, but almost the entire printing paper 3 is moved to the paper ejection tray (described later). 18, the reverse movement of the paper discharge tape 17 does not interfere with the paper discharge operation.

On the other hand, a paper discharge table 18 is installed at a position subsequent to the paper discharge tape 17 and extends horizontally along the paper discharge direction. This paper discharge table 18 has a pair of tape rollers 26 and 27 facing each other in the front and back, and both tape rollers 2.
A belt 30 wound between 6 and 27, and a tape rotation motor 2 for rotating the belt 30.
8.

Referring to FIG. 3, the structure of the paper discharge tray 18 will be described in detail. The left and right ends of the roller shafts 23, 33 that rotatably support the tape rollers 26, 27 are formed by a pair of left and right side plates facing each other and extending back and forth. It is supported at both front and rear ends of 29 via bolts 36. The tape rotation motor 28 fixed to one side plate 29
and the sprocket wheel 3 on the roller shaft 33 of the tape roller 26.
A chain 35 is hung between the belt 30 and the belt 30, and the belt 30 is always rotated in the same direction (in the direction of arrow D in FIG. 1) by the tape rotation motor 28.

The side plates 29 are mounted and supported on a front support frame 25 and a rear support frame 38, respectively, which are installed and fixed between the upper ends of the left and right printing press frames 40. The rear support frame 38 has a long hole 3 transparently provided at the rear end of the side plate 29.
The threaded portion 39a of the tightening lever 39 inserted through the frame 7 is screwed together, and by tightening the tightening lever 39, the side plate 29 is clamped and fixed between its large diameter portion 39b and the frame 40. Further, a clamping plate 41 is attached to the front support frame 25 by bolts 24, and by tightening the bolts 24, the front ends of the side plates 29 are held down from above. When the tightening lever 39 and the bolt 24 are respectively released, the both side plates 29 can be moved back and forth by a distance corresponding to the length of the elongated hole 37, and the movement is controlled by the tightening lever 39 and the clamping plate 41. As a result, the paper discharge tray 18 can be moved to a used position shown in FIG. 1, where it is spaced backward from the cylinder 6, and a non-used position, where it is stored below the paper discharge tape 17, as shown in FIG. It's summery.

Next, the operation of this embodiment having the above configuration will be explained.

The printing operation is performed in the same manner as in the conventional apparatus described above, but the printing paper 3 that has passed through the contact point between the cylinder 6 and the screen plate 10 is led out onto the paper discharge tape 17 via the printing paper guide 15. In this case, since the starting end of the discharge tape 17 is placed near the contact point between the cylinder 6 and the screen plate 10,
The drawn-out printing paper 3 is placed on the discharge tape 17 in a nearly flat state. Therefore, unlike in the past, even when thick printing paper 3 such as cardboard is used, the printing paper 3 is smoothly discharged without being greatly curved. Moreover, in this embodiment, since the discharge tape 17 extends along the tangential direction of the cylinder 6, smoother feeding can be achieved.

When washing the screen plate 10 or cleaning the cylinder 6, loosen the tightening lever 39 and the bolt 24, and move the side plate 29 of the sheet discharge tray 18 in the use position along the elongated hole 37. When the cylinder 6 is moved forward, most of the paper discharge table 18 is stored in the unused position below the paper discharge tape 17, as shown in FIG. 2, and the rear of the cylinder 6 is largely freed.
Therefore, if work such as cleaning is performed in this state, the work can be easily performed without being obstructed by the sheet discharge tray 18.

It should be noted that this invention is not limited to the above-mentioned embodiments, and the configuration of each part may be arbitrarily changed without departing from the spirit of this invention, such as by appropriately changing the support structure of the paper ejection tray 18. No problem.

Effects of the invention As detailed above, this invention enables thick printing paper to be smoothly ejected, and the mechanism used for this purpose can be used to easily wash or clean the screen plate and cylinder. It has excellent effects.

[Brief explanation of drawings]

Figure 1 is a front view of the main parts of a cylinder-type screen printing machine showing an embodiment of this invention;
The figure is a front view of the main parts when the paper output tray is stored, FIG. 3 is an enlarged plan view showing the support structure of the paper output tray, FIG. 4 is a front view of a conventional cylinder type screen printing machine, and FIG. FIG. 2 is an enlarged front view showing the printing action of the cylinder type printing press. 6 is a cylinder, 10 is a screen plate, 17 is a paper discharge tape as a first paper discharge member, 18 is a paper discharge table as a second paper discharge member, and 40 is a printing press frame.

Claims (1)

[Claims for Utility Model Registration] 1. A printer comprising a cylinder 6 rotatably supported by a printing press frame 40 and a screen plate 10 that is reciprocated as the cylinder 6 rotates in forward and reverse directions. The printing paper 3 is supplied between the printing paper 3 and the cylinder 6, and the printing paper 3 is driven by driving the cylinder 6 while pressing the screen plate 10 against the cylinder 6 via the printing paper 3.
In a cylinder type screen printing machine configured to perform printing, a first paper discharge member 17 is arranged on the paper discharge side of the cylinder 6 and extends along the paper discharge direction from near the contact point between the cylinder 6 and the screen plate 10. At the same time, a second paper discharging member 1 extending along the paper discharging direction is provided at a position subsequent to the first paper discharging member 17.
8 is installed, and its second paper ejection member 18 is supported movably with respect to the frame 40 between a use position away from the cylinder 6 and a non-use position close to the cylinder 6. Paper ejection device for cylinder type screen printing machines. 2. A paper discharging device for a cylinder type screen printing machine according to claim 1, wherein the first paper discharging member 17 extends obliquely along a substantially tangential direction of the cylinder 6. 3. In the cylinder type screen printing machine according to claim 1, wherein the second paper discharge member 18 is stored under the first paper discharge member 17 in the non-use position. Paper ejection device.