KR0144040B1 - Ink supplying device for a printer - Google Patents

Abstract

The present invention provides an ink supply apparatus of a rotary stencil printing press, comprising: projections and roller projections each protruding horizontally on top and middle of a support lever supporting ink equal dispersion means at both ends;

A cam portion protruding from the drum side plate of the support corresponding portion supporting the roller surface and the roller adhered to the roller protrusion; And a lever sensor configured to sense the rise of the lever by the rise of the protrusion part 22a. The ink supply device comprises a cam part on an inner surface of a side plate of a drum side plate and provides noise by providing a smooth operating condition at the contact surface of the cam. Can be realized, and the ink supply of the portion which does not require ink supply in the single rotation region of the drum can be effectively blocked.

Description

Ink Supply of Tumbler Printing Machine

1 is a front cross-sectional view of the present invention,

2 is a cross-sectional view of the right side state of FIG.

3 is an explanatory diagram of the cam portion shown in FIG.

4 is a cross-sectional view of the right side state of FIG.

5 is an enlarged view of main parts of FIG.

Figure 6 (a) is an enlarged cross-sectional view of the contact state showing the inner surface of the side plate of FIG.

(b) is an enlarged sectional view of the spaced apart state showing the inner surface of the side plate of FIG.

7 is a front sectional view in the case where the present invention is applied to an ink supply roller system.

* Explanation of symbols for the main parts of the drawings

It is a drum part 11: drum side

12: Clamp Device 13: Support

14: drum side plate 14 ': cam part

14a: inner side surface 14b: inner cam part

14c: rising part 14d: falling part

20: ink supply unit 21: hinge

22: support lever 22a: protrusion

22b: roller protrusion 22c: rubber member joint

23: Rubber member 24: Spring

25: Ink supply tube 26: Roller

27: Remaining ink detection sensor 28: Lever sensor

29: ink supply pump 31: press roller

41: Ink supply roller 42: Doctor roller

P: Printing paper S: Original film

The present invention relates to an ink supply apparatus of a rotary stencil printing press, in particular, forming projections and roller projections on a support lever for supporting ink equality supply means at both ends, and installing rollers on the roller projections, corresponding to a support for supporting a drum surface. By adding a cam portion to the inner surface of the side plate of the drum side plate to adopt a method to stop the ink supply without noise in the support (lamp) portion.

In general, a rotary stencil printing machine is provided with a rotating cylindrical drum, and a printing film is perforated on the outer circumferential surface of the drum, and printing ink is supplied by an ink supply device provided inside the drum. The press roller device is provided at the lower end of the drum, the drum and the press roller device are provided by the paper conveying device, and the perforated image is printed on one side of the paper conveyed between the drum and the press roller by the paper conveying device.

The printing ink supply apparatus in such a printing apparatus is usually evenly supplied with the printing ink to the inner surface of the drum by means of ink equalization means such as sheet-like rubber members or roller-type rubber rollers. This printing ink supply device usually displaces the displacement caused by the rotational movement of the drum which receives the rotational force of the drum or the cam provided on the delivery shaft or ink supplying reeler shaft itself which transmits the rotational force of the shaft to the ink supply roller (ink equalization means). And contactless contact with the drum inner circumferential surface of the ink supply device, thereby controlling the ink supply of the ink supply device. The printing ink supply apparatus has a disadvantage in that noise is high and the apparatus structure is complicated because the ink equalization means is contactless by the cam provided on the drum shaft or the ink supply roller shaft.

The present invention is to solve this problem by forming an inner cam portion on the drum side plate, the ink supply by the principle that the drum inner surface and the ink equalization means are separated smoothly when the roller additionally installed in the ink equalization means contact the inner cam portion. Characterized by suspending.

That is, the present invention, in the ink supply device of the rotary stencil printing press, a projection and a roller projection which protrudes horizontally on the top and middle of the support lever for supporting the ink equalization means at both ends;

A cam portion protruding from the drum side plate of the support corresponding portion supporting the roller surface and the roller adhered to the roller protrusion; It comprises a lever sensor made to detect the rise of the lever by the rise of the projection (22a).

The cam portion is a rising portion such that the height in the radial direction gradually increases on the inner surface of the side plate near the support of the drum side plate; An inner cam portion with a constant height in the radial direction at the end of the rise portion; The height in the radial direction is gradually lowered at the end of the inner cam portion, and is made up of a lower portion coinciding with the side plate inner surface 14a; This coincidence is made to coincide with the circumferential end corresponding portion of the support.

Hereinafter, the configuration according to the present invention and embodiments thereof will be described in detail with the accompanying drawings.

FIG. 1 is a front sectional view showing a schematic configuration of an embodiment according to the present invention, and FIG. 2 is a side sectional view of the embodiment according to FIG.

FIG. 1 is a view showing the ink supply apparatus and the drum in the printing standby or printing state of the ink supply apparatus drum and the additional apparatus in one embodiment of the present invention, and FIG. A front sectional view showing a state in which the drum is rotated so that the ink supply device is spaced apart from the drum surface to stop the supply of the printing ink, and FIG. 4 is a side sectional view of FIG.

FIG. 5 is a front sectional view showing in more detail the ink supply apparatus spaced apart from the drum surface shown in FIG. 3, and a) and b) of FIG. 6 in the drawing show contact and separation at the drum surface of the ink supply apparatus. A side cross-sectional view showing in detail.

7 is a view showing an application example in a roller type ink supply device according to another embodiment of the present invention.

Specifically, in FIG. 1 and FIG. 2 of the drawing, reference numeral 10 denotes a drum portion. The drum portion 10 to 11 is a drum surface, which is formed of a thin plate-shaped member, and a minute hole is formed in a portion to be supplied with ink, whereby ink is supplied from the drum to the circumferential surface of the drum outside. This is done. 12, the clamp device clamps the tip of the base film so that the drum is attached to the perforated base film on the outer circumferential surface thereof. The clamp device consists of a clamp, a magnetic plate and several components that drive the clamp. (13) supports the drum face (11) of the drum (10) and the components of the clamp device (12) as a support, and the support drum (13) and the drum side plate (14) provide a thin drum face (11). It is forming a cylinder. The drum side plate 14 has a symmetrical shape, and has a side plate inner surface 14a and the drum face 11 is in contact with the outer circumferential surface of the side plate inner surface 14a. The side plate inner surface 14a is formed with a cam portion 14 'consisting of a raised portion 14c, an inner surface cam portion 14b and a lowered portion 14d.

An ink supply apparatus 20 is provided inside the drum 10 to supply printing ink, and printing is performed by the supplied printing ink.

The ink supply device 20 has a hinge 21 supported by a main body (not shown), and is provided with a lever 22 that performs a lever movement about the hinge 21. The lever 22 is formed in a c-shape, the hinge 21 is coupled to the hole of both sides to be rotated and supported, and the projection 22a is provided at the other upper end of the support point or the corresponding position (upper end in the drawing shown). It is formed, the projection 22a is made to enable the ON / OFF operation of the lever sensor 28 provided in the main body to detect the vertical movement of the lever 22.

The lever 22 is provided with a roller protrusion 22b, and the roller protrusion 22b is rotatably coupled to the roller protrusion 22b, and the bottom portion of the c-shaped lever 22 is made of a rubber member fitting portion 22c. The rubber member 23, which is an ink equal dispersion means, is bonded to the rubber member bonding portion 22c by an adhesive or a suitable means. The rubber member 23 is provided so as to uniformly apply the supplied ink to the inside of the drum face 11 to uniformly apply printing ink and to apply proper pressure.

The spring 24 is installed so that the rubber member 23 comes into close contact with the inner circumferential surface of the drum surface 11 at an appropriate pressure. In the figure shown, the shape of the compression spring is indicated, but may be replaced by the tension spring so that an appropriate pressure is applied in consideration of the own weight of the lever 22 and the rubber member 23 and the like. In any case, the spring 24 is installed so as to extend an appropriate required pressure to the inner contact surface of the rubber member 23 and the drum surface 11.

The ink supply tube 25 supplies ink to the inside of the drum 10, which is performed by the operation of the ink supply pump 29.

Residual ink detection sensor 27 is usually located in front of the rubber member 23 is preferably installed to detect the remaining amount of the printing ink supplied and to generate an ON signal when more than the appropriate amount of ink is supplied.

The roller 26 is rotatably adhered to the roller protrusions 22b located on both sides of the c-shaped lever 22, and lifts the lever 22 in rotational contact with the inner cam portion 14B of the drum side plate 14. Or is releasable. As a result, the rubber member 23 must be assembled to stop or supply ink to the inner surface of the drum face 11.

The lever sensor 28 is a sensor for detecting the position of the lever 22. When the lever 22 is raised and spaced apart from the rubber member 23 and the drum surface 11, the lever sensor 28 is installed on the main body to generate a signal. do.

The ink supply pump 29 supplies the printing ink to the front of the rubber member 23 located inside the drum face 11 through the ink supply tube 25. The residual ink detection sensor 27 and the lever sensor 28 Control program to calculate the amount of printing ink to be supplied by the on / off signal of the < RTI ID = 0.0 > and < / RTI > (Not shown).

The press roller 31 adheres to the drum surface 11 by applying an appropriate pressure to the printing paper P supplied between the drum surface 11 to print the punched image of the stencil sheet (original film) S. It transfers and prints on the paper P. The press roller 31 is pressed after the front end Pa of the corresponding position on the drum surface 11 of the printing paper P reaches the press roller 31, and the end of the base film S Before Sb) arrives, the pressing is released from the outer peripheral surface of the drum surface 11. In other words, pressing and releasing are repeated to correspond to the rotational phase of the drum 10.

The tip Sa of the base film S is clamped to the clamp device 12, and the tip Sb is at the position shown in FIG. The printing paper P is transferred between the drum face 11 and the press roller 31 to perform printing. The corresponding position of the paper contact face on the drum face 11 is indicated by P ', and the tip thereof is Pa. The end is marked with (Pb).

In addition, in a) and b) of FIG. 6, T1 denotes the distance between the roller 26 and the side plate inner surface 14a of the drum side plate 14, and T2 denotes the space between the support 13 and the rubber member 23. FIG. Indicates the interval of.

The embodiments according to the configuration of the present invention has been described above.

Referring to the operation of the embodiment according to the configuration of the present invention as follows.

In FIG. 1, the drum portion 10 rotates counterclockwise, and in synchronization with the rotation of the drum, the printing paper P is transferred between the drum face 11 and the press roller 31, and the press roller ( The perforated image of the base film S attached to the outer circumferential surface of the drum face 11 by the pressure of 31 is printed on the paper. At this time, the ink used for printing is supplied to the front portion of the rubber member 23 provided on the inner circumferential surface of the drum portion 10 through the ink supply tube 25 by the operation of the ink supply pump 29.

At this time, the lever 22 at the time of printing rotates in a clockwise direction to be in a lowered state, so that the rubber member 23 is in close contact with the drum surface 11 and the rubber which is an ink equal dispersion means supplied by the tube 25. By the capillary effect of the member 23, it spreads evenly to the drum surface 11 in the width direction, and is supplied promptly.

Specifically, the process of printing on the paper P by rotating the drum once will be described. The original film S is mounted on the outer circumferential surface of the drum surface 11 by the first clamp device 12, and then the drum is Starts counterclockwise rotation, at which time the lever 22 of the ink supply device 20 immediately before or immediately after the leading edge Pa of the contact surface P 'of the paper on the drum surface reaches the press roller 31 The rubber member 23 is lowered (rotated clockwise) in contact with the inner circumferential surface of the drum face 11, and the ink supplied by the ink supply tube 25 is transferred to the drum face 11 by the rubber member 23. It is spread quickly over the inner circumferential surface of the shell. Subsequent rotation of the drum section 10 and the press roller 31 causes the printing paper P to contact the outer circumferential surface of the drum surface 11 and to press the drum surface 11 through the perforated image of the base film P. Ink supplied therein is transferred to printing paper P and printing is performed.

Subsequently, the printing continues by the continuous rotation of the drum section 10, and the roller 26 is spaced apart from the inner side surface 14a of the drum side plate 14 by an interval T1 (FIG. 6A). When the end Pb of the printing paper P passes through the press roller 31, the press roller 31 is spaced apart from the outer circumferential surface of the drum surface 11 (selective separation technique of the press roller 31 is known. At the same time, the roller 26 contacts the raised portion 14c of the drum side plate 14 so that the lever 22 rotates counterclockwise and ascends, whereby the rubber member 23 is spaced apart from the drum surface. To maintain the gap T2 with the support 13 (FIG. 6B). At this time, the projection 22a of the lever presses the lever sensor 28 and the lever sensor 28 generates an ON signal. By this ON signal, the ink supply pump 29 stops the operation to stop the supply of printing ink, thereby stopping the supply of unnecessary printing ink to the support 13.

Subsequent rotation of the drum portion 10 causes the roller 26 to pass through the raised portion 14c of the drum side plate 14 and reach the inner cam portion 14b, in which the rubber member 23 supports the support 13. And a predetermined interval T2 are maintained (FIG. 6B). If it continues to rotate in the inner surface cam part 14b, it will contact the lower part 14d, and the lever 22 will fall by this. If the lowering continues, the rubber member 23 contacts the inside of the drum surface 11, at which time the printing paper is transferred between the drum surface 11 and the press roller 31 again, and the second sheet of printing is performed. .

That is, the roller 26 starts to contact with the rising portion 14c in the inner cam portion 14a of the drum side plate 14, rotates and rises along the inclination of the rising portion 14c, passes through the inner cam portion 14b, As the rotation continues, the roller 26 descends along the lower portion 14c and the contact ends on the way, because the rubber member 23 starts contacting the inner circumferential surface of the drum face 11 again. to be.

At this time, the contact curves of the rollers 26 and the contact portions 14c, 14b, and 14d of the drum side plate 14 are preferably manufactured so that the vertical movement (rotational movement) of the lever 22 is also kept extremely smooth. This is to avoid accompanied by noise and vibration during vertical movement of the lever 22 and the rubber member 23.

In conclusion, the roller 26 moves up and down by the cam portion 14 'provided on the inner circumferential surface of the drum side plate 14 of the drum portion 10, and the lever 22 moves the lever by this up and down movement. The rubber member 23 for supplying ink to the inner circumferential surface of the drum surface 11 is in contact / non-contact with the inner circumferential surface of the drum surface 11. At this time, the rubber member 23 not only escapes the support 13 in the vertical motion, but also the tip of the contact portion P 'on the drum surface 11 of the paper P, that is, the ink supply portion. The contact is attempted immediately before Pa) and the contact is terminated at the end Pb. In this way, ink supply is performed in all areas where ink supply is necessary. At this time, the contact between the roller 26 and the drum side plate 14 is made in an extremely smooth state to minimize vibration and noise.

Meanwhile, the present invention is applicable to the roller-type ink supply means as shown in FIG. 7 in addition to the first to sixth degrees in which the ink equalization means is the rubber member 23, and the ink supply roller 41 rotates to supply ink. The supply of ink is restricted by the doctor roller 42. At this time, the ink supply roller 41 and the doctor roller 42 are supported by the lever 22, and the lever 22 is the side plate inner surface 14a of the drum side plate 14 as shown in FIGS. The cam portion 14 'formed in the upper and lower motions is provided, whereby the ink supply roller 41 also moves up and down, thereby avoiding contact with the support 13 during the rotation of the drum. Let's do it.

As described above, the present invention can realize noise reduction by forming a cam part on the inner surface of the side plate of the drum side plate and imparting a smooth operating condition at the contact surface of the cam, and does not require supply of ink in one rotation area of the drum. Can effectively block the ink supply.

Claims (2)

In the ink supply apparatus of the rotary stencil printing machine, the projections 22a and the roller projections 22b which protrude horizontally on the upper and middle portions of the support lever 22 supporting the ink equalization means at both ends; A cam portion 14 'protruding from the drum side plate 14 at a portion corresponding to the support body 13 supporting the roller 26 and the drum surface 11 contacted with the roller protrusion 22b; And a lever sensor (28) configured to sense the rise of the lever (22) by the rise of the protrusion (22a). 2. The cam portion (14 ') according to claim 1, wherein the cam portion (14') comprises: a rising portion (14c) such that the height in the radial direction is gradually increased in the side plate inner surface (14a) near the support (13) of the drum side plate (14); An inner cam portion 14b having a constant height in the radial direction at the end of the rising portion 14c; At the end of the inner cam portion 14b, the height in the radial direction is gradually lowered to be made up of the lower portion 14d coinciding with the side plate inner surfaces 14a and 14a; This coincidence portion is made to coincide with the circumferential end corresponding portion of the support body (13).