JPH0119346B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention relates to a cylinder-type screen printing machine, and more particularly to a paper ejecting device that allows easy cleaning of the underside of the screen plate and removal of dirt on the surface of the cylinder. It is.

Prior Art First, the outline of a conventional cylinder-type screen printing machine shown in FIG. The paper is positioned at the front as shown in FIG. 2 (the paper feeding device and positioning device are omitted).

This cylinder 3 is moved in the direction of the arrow 102 or in the opposite direction by the meshing of a sector gear 7, which is swung back and forth via a connecting rod 6 with the rotation of the crank 5, and a gear 8 attached to the end of the cylinder 3. It is rotated forward and backward in 102 directions. The screen plate 9 installed above the cylinder 3 moves forward and backward (arrow 10) as the cylinder 3 rotates forward and backward.
3, 104 directions) (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 opposite to the arrow 102 as shown in FIG. After gripping 101, it is reversed in the direction of arrow 102. At this time, the squeegee 10 is lowered at the passing point of the paper-biting claws 4, pressurizes the screen plate 9 moving backward, that is, in the direction of the arrow 104 as shown in FIG. 2, and pushes out the ink on the screen plate. Printing paper 10 fed under 9
Print on the surface of 1.

When the cylinder 3 is rotated in the direction of the arrow 102 and the paper gripping claw 4 opens in front of the printing paper guide 11 as shown by the imaginary line in FIG. 2, the printing paper 101 is moved to the printing paper guide 11 as shown in FIG. flowing above,
The paper is placed on a paper discharge table 12 installed on the paper discharge side of the cylinder 3 and is discharged. At this time, the cylinder 3 is rotated to a certain position in the direction of arrow 102 as shown in FIG. After being moved forward to a certain position, it is moved back in the direction of arrow 103. Also, as the screen plate 9 moves in the direction of the arrow 103, 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 again rotated in the direction opposite to the arrow 102 to a certain position, and the same operation as described above is repeated to perform printing.

In the conventional example described above, the cleaning of the back side of the screen plate 9 and the removal of dirt on the surface of the cylinder 3 are carried out over a long period of time by directly reaching below the screen plate 9 from behind or by using a tool. was. However, when the screen plate 9 is in the position shown in FIGS. 2 and 3, the space 105 between it and the paper feed belt 2 and the space 106 between it and the paper output table 12 are relatively narrow, making it difficult to operate. Because it is difficult to perform cleaning, sufficient cleaning is often not possible, and in the end, the screen plate 9 has to be removed and cleaned.

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, the space 10 below the screen plate 9
It is thought that cleaning will be easier if the number 5,106 is widened. For that, there is a paper feed belt 2 or a paper output tray 1.
2 may be retracted downward from below the screen plate 9, but retracting the paper feed belt 2 is difficult due to interference with other devices, and it is desirable to retract the paper ejection table 12.

In addition, in such a conventional printing press, as shown in FIGS. 1 to 3, a shaft stay 17 is attached to the rear end between the left and right frames 32 of the printing press, and this shaft stay 17 allows the left and right frames 32 to be frame 3
2 were to be connected. Since this shaft stay 17 is always located below the screen plate 9 regardless of the lowering of the paper discharge tray 12, it becomes a hindrance to cleaning the screen plate 9 and the cylinder 3. Therefore, in order to facilitate cleaning work, it is desirable to also remove this shaft stay 17.

Purpose Therefore, the object of the present invention is to make it possible to retract the paper delivery table downward, and to omit the shaft stay that connects the left and right frames of the printing press, thereby making it possible to clean the underside of the screen plate and remove dirt from the cylinder surface. Not only is it easy to remove, but when the paper output tray is returned to a horizontal position, it can be securely fixed between both frames of the printing press.
Moreover, it is an object of the present invention to provide a paper ejecting device for a cylinder type screen printing machine, which enables accurate determination of the horizontal and vertical positions of the rear end of the paper ejecting table at this time.

Embodiment One embodiment shown in FIGS. 4 to 6 is such that the belt holder of the paper delivery tray 12 is placed between the front belt pedestal 14 and the rear belt pedestal 15 at a position close to the cylinder 3 in order to retract the paper delivery tray 12. A rear belt stand 15 is separated and connected to a front belt stand 14 by a hinge 16, and as shown in FIG. It is supported by a support device consisting of.
Then, as shown in FIGS. 4 and 6, when the rear belt stand 15 is bent downward to a substantially hanging position, a large space 106 is left under the screen plate 9.
Hands and instruments can be easily brought close to the underside of the screen plate 9, making it easy to clean the underside of the screen plate 9 and remove dirt from the surface of the cylinder 3, which greatly improves work efficiency. I can contribute.

The configuration of the support device for the paper discharge tray 12 will be described in more detail with reference to FIG. 7 and subsequent figures. FIG. 7 is a view of the rear end portion of the sheet discharge table 12 and its support device as viewed from above. A pair of paper discharge tray frames 24 are provided on both the left and right sides (up and down in FIG. 7) of the rear belt stand 15 of the paper discharge tray 12, and between the rear ends of these frames 24, a plurality of paper discharge belts are provided. A belt roller 39 for hanging 37 is rotatably hung.

A support shaft 22 is provided at a position immediately before the belt roller 39 so as to pass through both the paper delivery tray frames 24 from side to side, and this shaft 22 is rotatable with respect to both the paper delivery tray frames 24. There is. A pair of pins 25 are inserted through the left and right ends of the support shaft 22, and a pair of left and right positioning rollers 26 are rotatably attached to both ends of each pin 25, respectively.

Further, a rotary lever 27 is fixed on the support shaft 22 so as to be located inside each of the positioning rollers 26 . In particular, as shown in FIGS. 8 and 13, a vertical positioning roller 29 is rotatably mounted on a shaft 28 at the tip of each rotating lever 27. Further, a handle 30 for rotating the support shaft 22 is attached to one of the rotation levers 27.

As shown in FIGS. 7 and 9, clamp boxes 21 shown in FIG. 10 are fixed to the inner rear end portions of both left and right frames 32 of the printing press, and these correspond to both left and right ends of the support shaft 22. It's becoming like that. The pair of left and right positioning rollers 26 are inserted into each box 21 from below, and these rollers 26 and both clamp boxes 21 position the rear end of the paper output table 12. A positioning device for determining left and right positions is configured.

Each box 21 has a substantially rectangular cylindrical shape with both upper and lower ends open, as shown in FIGS. 10 to 12.
A pair of inner and outer side plates 41, 42 and a pair of front and rear side plates 4
3,44. An insertion groove 45 is formed in the inner plate 41 at a central portion thereof in the front-rear direction so as to extend in the vertical direction.
The inner plate 41 is divided into two parts 41a and 41b, front and rear. Note that the thickness of the front inner side plate 41a is thicker than the thickness of the rear inner side plate 41b. Each end of the support shaft 22 can be inserted into each of the insertion grooves 45 from below,
The shaft 22 and the pair of clamp boxes 21 constitute a support device that supports the paper discharge table 12.

Also, the inner and outer side plates 41, 4 of each box 21 are
2, a plurality of tapered portions 46 are formed on the inner surfaces of both the upper and lower portions thereof. These tapered portions 46 are provided to facilitate rotation of each pair of left and right positioning rollers 26 within the box 21.

Further, a locking groove 34 for engaging the vertical positioning roller 29 at the tip of each rotating lever 27 is recessed in the front inner plate 41a of each box 21. Each of the locking grooves 34 includes a front-sloping slanted surface 54 constituting its lower edge, and an abutment surface 55 that stands upright from the upper end of each slanted surface 54 .
This locking groove 34 and the vertical positioning roller 2
9 constitute a positioning device for determining the vertical position of the rear end of the sheet discharge table 12.

As shown in FIG. 7, a cam 35 is fixed to one end of the support shaft 22 between a rotary lever 27 provided with the handle 30 and the paper output table frame 24 adjacent to the lever 27. ing. And, in front of this cam 35, the same cam 35
A microswitch 36 is provided which is operated by a microswitch 36 and is mounted on the outside of the tray frame 24.

When the paper delivery table frame 24 moves upward, the protrusion 38 of the cam 35 does not engage with the micro switch 36, as shown in FIG. Retained. Further, when the paper discharge table 12 is lowered, the protrusion 38 of the cam 35 engages with the micro switch 36 as shown in FIG.
is held in a state where it can move up and down.

Next, a vertical movement operation of the paper ejection tray 12 configured as described above will be explained.

Now, in the operating state where the rear belt stand 15 is horizontal as shown in FIG. 5, the pins 25 of each pair of left and right positioning rollers 26 at both ends of the support shaft 22 extend back and forth as shown in FIG. It is located horizontally within each clamp box 21. Further, as shown in FIGS. 8 and 13, each vertical positioning roller 29 engages on the slanted surface 54 of each box 21. As shown in FIGS. Further, as shown in FIG. 15, the protrusion 38 of the cam 35 on the support shaft 22 does not engage with the micro switch 36, so that the printing press can be operated but the paper delivery tray 12 cannot be raised or lowered. ing.

When bending the rear belt stand 15 of the paper delivery stand 12 downward from the state shown in FIG. 5 as shown in FIG. Rotate it 90 degrees.
Then, the support shaft 22 and both rotating levers 27
As shown in FIG. 14, both the upper and lower positioning rollers 29 are moved rearward and downward, so that they are removed from the slanted surface 54. Note that when the vertical positioning roller 29 comes off in this way, the roller 29 rolls on the slanted surface 54.

Furthermore, when the support shaft 22 is rotated in this manner, at the same time, each pair of left and right positioning rollers 26 at both ends of the shaft 22 are also rotated approximately 90 degrees from the state shown in FIG. 11, as shown in FIG. 12. It will be in an almost horizontal state. When the left and right positioning rollers 26 are rotated together with the support shaft 22 in this manner, the left and right side surfaces of these rollers 26 are located at locations corresponding to the tapered portions 46 of the inner and outer side plates 41 and 42, and the side plates 41 , 42 are slightly separated from the inner wall, so the rotation of the roller 26 is performed smoothly.

As described above, when both the vertical positioning rollers 29 come off the slanted surface 54 and the left and right positioning rollers 26 become horizontal, the engagement between each clamp box 21 and the vertical positioning rollers 29 and the left and right positioning rollers 26 is released. Therefore, the rear belt stand 15 can be bent downward.

In addition, in the state shown in FIGS. 12 and 14,
As shown in FIG. 16, the protrusion 38 of the cam 35 on the support shaft 22 engages with the microswitch 36, rendering the printing machine inoperable and allowing the paper discharge tray 12 to move up and down.

To return the lowered rear belt rest 15 to the operating state shown in FIG. 5, the rear end of the rear belt rest 15 is lifted upward. Then, both left and right end portions of the support shaft 22 of the belt stand 15 are inserted into the insertion grooves 45 of both clamp boxes 21 from below. Then, as shown in FIGS. 12 and 14, each pair of left and right positioning rollers 26 also enters the clamp box 21 in a horizontal state. Also, at this time, both the upper and lower positioning rollers 29 are located behind the locking grooves 34 of each clamp box 21, and the protrusion 38 of the cam 35 is located at the 16th position.
It engages the micro switch 36 as shown.

When the rear belt stand 15 is moved upward in this way,
Subsequently, the handle 30 on the support shaft 22 is rotated upward. Then, as shown in FIGS. 11 and 13, the vertical positioning rollers 29 at both ends of the shaft 22
engages on the sloped surface 54 inside each box 21,
Further, the front surface of each roller 29 comes into contact with the stopper surface 55. Therefore, the vertical position of the support shaft 22, that is, the vertical position of the rear end of the rear belt stand 15 can be accurately determined.

Also, when the handle 30 is lowered as described above, the left and right positioning rollers 26 outside each lever 27
11 and 13, each box 21 is rotated about 90 degrees. The left and right sides of each roller 26 are connected to the inner and outer side plates 41, 42 of the box 21.
comes into contact with the inner wall surface of the As a result, the lateral position of the support shaft 22, that is, the lateral position of the rear end of the rear belt stand 15 can be accurately determined.

Note that when the left and right positioning rollers 26 are rotated by 90 degrees, the left and right side surfaces of these rollers 26 initially correspond to the tapered portion 46 inside the box 21 and are slightly separated from this tapered portion 46, so that the rollers 26 are rotated by 90 degrees. Rotates smoothly.

Effect: Therefore, by doing this, the position of the rear end of the rear belt stand 15 in the vertical and horizontal directions can be easily and accurately determined, and moreover, it can be reliably held in this state, so that the rear end of the rear belt stand 15 can be held in this position with respect to the printing press frame 32. It doesn't move or shake. Furthermore, both frames 32 of the printing press are connected to each other via the paper discharge table 12, and the shaft stay 17 for fixing both frames 32, which was necessary in the conventional printing press, is also unnecessary.

As described in detail above, the present invention allows the paper delivery tray 12 to be retracted downward so as to leave a large space 106 between the paper delivery tray 12 behind the cylinder 3 and the screen plate 9 above the paper delivery tray 12. By providing a support device for supporting the printer, and a positioning device for determining the vertical and horizontal positions of the rear end of the paper delivery tray 12 with respect to the pair of printing press frames 32 in the supported state, the shaft of the conventional device can be improved. By omitting the stay, it is not only possible to easily wash the bottom of the screen plate and remove dirt from the cylinder surface, but also to ensure that it is placed between both frames of the printing press when the paper output table is returned to a horizontal position. It is an excellent invention for industrial use as a sheet ejecting device in a cylinder type screen printing machine because it can be fixed and, at this time, the left and right and up and down positions of the rear end of the sheet ejecting table can be determined accurately.

[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 the operating state of the conventional printing machine, and Fig. 4 is a paper discharge device embodying the present invention. 5 is a partially enlarged view showing the state of the paper ejecting device during operation, and FIG. 6 is a partially enlarged view showing the state of the paper ejecting device during cleaning of the screen plate. 7 is a partially enlarged plan view showing the support device and positioning device for the paper ejection table, and FIG. 8 is a partially enlarged plan view showing the positional relationship between the paper ejection table and the clamp box when the paper ejection table is moved upward. FIG. 9 is a partially enlarged side view showing a support device and a positioning device for the sheet discharge tray;
Figure 10 is an enlarged perspective view of the clamp box,
Fig. 1 is a partially enlarged side view showing a state in which the vertical positioning roller and left and right positioning rollers are engaged with the clamp box, and Fig. 12 is a partially enlarged side view showing a state in which the left and right positioning rollers are inserted into the clamp box from below. Figure 13 is a partially enlarged front view showing a state in which the vertical positioning rollers and left and right positioning rollers are engaged with the clamp box, similar to Figure 11, and Figure 14 is a partially enlarged front view showing the state in which the left and right positioning rollers are clamped, similar to Figure 12. Fig. 15 is a partially enlarged front view showing the state in which the cam on the support shaft is not engaged with the micro switch, and Fig. 16 is a partially enlarged front view showing the state in which the cam is inserted into the box from below. FIG. 3 is a partial front view showing a state in which the microswitch is engaged. Cylinder...3, Screen plate...9, Paper output table...12, Clamp box...21, Support shaft...22, Left and right positioning rollers...26,
Vertical positioning roller...29, printing press frame...
...32, Printing paper...101, Space...106.

Claims (1)

[Scope of Claims] 1. A cylinder 3 for sending the printing paper 101 onto the paper delivery tray 12 behind it, and a cylinder 3 for reciprocating in the front and rear directions as the cylinder 3 rotates forward and backward. It is equipped with a screen plate 9 provided above, and presses the screen plate 9 from above against the printing paper 101 that is sent between the screen plate 9 and the cylinder 3 in synchronization with the backward movement of the screen plate 9. In a cylinder-type screen printing machine that is designed to perform printing, a paper discharge tray 12 behind the cylinder 3 and
A support device is provided to support the paper discharge tray 12 so that it can be retracted downward so as to leave a large space 106 between it and the upper screen plate 9, and the paper discharge tray 12 is supported relative to the pair of printing press frames 32 in the supported state. A paper ejecting device comprising a positioning device for determining the vertical and horizontal positions of the rear end. 2. The support device includes a support shaft 22 that is attached to the rear end of the paper delivery tray 12 and has both left and right ends protruding from the paper delivery tray 12 in both left and right directions, and a pair of printing shafts that support both ends of the shaft 22. machine frame 32
A paper discharge device for a cylinder type screen printing machine according to claim 1, comprising a pair of clamp boxes (21) fixed to the inside. 3. Each clamp box 21 has a substantially rectangular cylindrical shape with both upper and lower ends open, and has a pair of inner and outer side plates 41,
42 and a pair of front and rear side plates 43, 44, and the inner plate 41 is formed with an insertion groove 45 that extends in the vertical direction and into which both ends of the support shaft 22 can be inserted. A paper ejecting device in the cylinder type screen printing machine described above. 4. The positioning device includes a pair of left and right positioning rollers 26 which are attached to both ends of the support shaft 22 and fitted into the clamp box 21, and a pair of left and right positioning rollers 26 which are attached to the inside of these positioning rollers 26 and which are attached to the support shaft 22 and which are attached to the clamp box 21. Box 21
4. A paper ejecting device for a cylinder type screen printing machine according to claim 3, comprising a vertical positioning roller 29 that engages with a locking groove 34 formed in an inner plate 41. 5 Each pair of left and right positioning rollers 26 is rotatably attached to both ends of a pair of pins 25 passing through the support shaft 22, and the pair of vertical positioning rollers 2
5. A paper ejecting device for a cylinder type screen printing machine according to claim 4, wherein reference numeral 9 is rotatably attached by a shaft 28 to the tips of a pair of rotating levers 27 fixed on a support shaft 22. 6 When the sheet discharge tray 12 is fixed in the raised state, each pair of left and right positioning rollers 26 are positioned in front and back in the clamp box 21, and are aligned with the inner and outer side plates 41, 4.
2, and the vertical positioning roller 29 is inscribed in the inner plate 4.
6. A sheet ejecting device for a cylinder type screen printing machine according to claim 5, wherein the sheet discharging device is adapted to engage with the first locking groove 34.