JPH0440920Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention is a printed matter varnishing method that is installed in the upstream side of the paper discharge device of a rotary printing press or in an independent varnishing machine to apply varnish to the printed surface of paper after printing. It is related to the device.

[Prior art]

The printed surface of paper printed with a rotary printing press is prone to staining during subsequent processes because the ink dries slowly, and in the case of sheet-fed paper, set-off occurs when stacking the discharged paper, so this can be prevented. In order to do this, a drying device is installed in the conveyance path of the printed paper, or a spray powder is applied at this location. However, drying equipment requires large-scale equipment, and dust particles can make the paper rough and lose its luster, or cause problems when reprinting. BACKGROUND ART Preventing stains and giving gloss to paper surfaces is mainly carried out for printed matter that requires beauty, such as book covers, catalogs, and pamphlets.

This type of varnishing device is generally installed between the printing unit and paper ejection device of a rotary printing press, and may also be installed in an independent varnishing device or used as a water supply device for the printing unit. has also been attempted. Its structure includes a group of rollers arranged in the same manner as the water supply device of the printing unit, and the varnish stored in the varnish tank is supplied to the surface of the blanket cylinder via this group of rollers, and the varnish is distributed between the blanket cylinder and the impression cylinder. Many of them are designed to transfer varnish from a rubber cylinder to the paper passing through it.

The varnish used in such varnishing equipment is a water-based varnish that dries quickly, so if you interrupt varnishing work for a long time or switch to printing work that does not require varnishing, the varnish inside the varnishing boat must be It is necessary to wash the varnished boat so that it does not dry out. However, in conventional varnishing equipment, the varnishing boat is fixed, or even if it is removable, bolts must be loosened in narrow places, and it is troublesome to attach and detach, so the varnishing boat is fixed. The original roller that rotates inside the container or inside the varnishing boat is often cleaned. Therefore, when cleaning the bottom of the varnishing boat and the lower surface of the former roller facing the bottom, it is necessary to insert a cloth or the like into this narrow gap to wipe off the varnish, resulting in extremely poor work efficiency and incomplete cleaning. The paper often got dirty the next time I applied varnish. In addition, the varnishing boat is made larger than necessary to facilitate cleaning, which increases the amount of varnish consumed and increases the space occupied by the device.

[Summary of the idea]

The present invention was devised in view of these points, and is used in a printed matter varnishing apparatus in which a varnishing boat is provided below the original roller, which is rotatably supported on both sides of the frame and cannot be moved. The drive shaft has a drive shaft that is movably supported and has a pair of left and right levers, a sliding body that is supported by the lever by engagement with a pin and an elongated hole, and a guide groove that non-rotatably guides the sliding body. a guide body fixed to the inner surface of both sides of the frame, which moves in parallel between a use position where the lower part of the original roller is immersed in varnish and a non-use position diagonally downward when the lever swings; , and the varnishing boat is detachably attached to the sliding body in the horizontal direction. This will be explained below based on embodiments shown in the drawings.

〔Example〕

This embodiment shows an example in which the present invention is applied to a four-color sheet-fed rotary printing press. Fig. 1 is a schematic side view of the printing press in which the invention is applied, and Fig. 2 shows a fourth-color printing unit and a varnishing unit. 3 is a partially cutaway side view of the varnish boat and its support device, FIG. 4 is a partially cutaway plan view, and FIG. 5 is a partially cutaway front view. The machine 1 is equipped with a paper feeding device 2, a four-color printing unit 3, a varnishing unit 4, and a paper discharge device 5, each of which is assembled separately and joined together. Each printing unit 3 is provided with a plate cylinder 6 having a printing plate attached to its circumferential surface, an inking device (not shown) that supplies ink to the plate surface, and a water supply device 7 that supplies dampening water. A rubber cylinder 8 is placed in contact with the cylinder 6 to transfer an image formed on the printing plate using ink and dampening water. In each printing unit 3, an impression cylinder 9 with a double diameter is arranged opposite to the blanket cylinder 8, and between each adjacent impression cylinder 9, a transfer cylinder 10 with a double diameter is also arranged opposite to both impression cylinders 9. are located adjacent to each other. In addition, the varnishing unit 4 also has a magnification impression cylinder 11 installed at the same height as the other impression cylinders, and this impression cylinder 11 and the fourth color impression cylinder 9
A transfer drum 12 is disposed between the two. The paper 13 stacked on the paper stacking table of the paper feeder 2 is sucked one by one by a suction device (not shown) and placed on the difference plate 1.
4, it is transferred to the claw of the impression cylinder 9 of the first color by a swing device, and then transferred to the transfer cylinder 1.
0, while being conveyed while being held alternately by the claws of the impression cylinder 9, printing in four colors is applied to the blanket cylinder 8, and the paper is held by the claws of the impression cylinder 11 provided in the varnishing unit 4. It is then wrapped around the surrounding surface. The paper ejecting device 5 includes a paper ejecting cylinder 15 that faces the impression cylinder 11 and a pair of left and right sprockets 16 fixed coaxially thereto. In between,
Paper ejection chain 1 equipped with a large number of paper ejection claws at regular intervals
9 is hung. Then, the paper 13 held in the claw of the impression cylinder 11 is transferred to the paper ejection claw of the paper ejection chain 19, and is released from the paper ejection claw at the end of the conveyance and falls onto the paper stacking table 20 and is stacked. be done.

The varnishing unit 4 of the printing press 1, which is roughly constructed as described above, is provided with a varnishing device generally designated by the reference numeral 21. This varnishing device 21
The varnishing roller includes a blanket cylinder 22 that is in contact with the impression cylinder 11 and has a bracket wound around its circumferential surface, an applicator roller 23 that is in contact with the blanket cylinder 22, and a metering roller 24 that is in contact with the applicator roller 23. , and a base roller 25 that is in contact with the metering roller 24. Of these, the blanket cylinder 22 is configured to rotate an eccentric bearing that supports the blanket cylinder 22, thereby increasing the applicability of the applicator roller 23.
It is configured to be attached to and detached from the impression cylinder 11. In addition, the original roller 25 is replaced by a varnish boat 26 which will be described later.
The metering roller 2 is rotatably supported by the left and right frames 28 while being immersed in the varnish 27 stored therein.
4 is supported at both ends by a pair of arms pivotally supported by bearings at both ends of the original roller 25. The metering roller 24 is pressed against the applicator roller 23 while maintaining a predetermined contact pressure by the biasing of a spring member and the regulation of an adjustable stopper, and the predetermined contact pressure is maintained by adjusting the eccentricity of the shaft end. However, it is pressed against the original roller 25. A rider roller 29 is supported by an arm and is brought into contact with the application roller 23. And the varnish 27 stored in the varnish boat 26
is pulled up by the source roller 25 rotating in the direction of the arrow, and after adjusting the film thickness with the metering roller 24, is transferred to the forming roller 23, further transferred from the forming roller 23 to the blanket cylinder 22, and then transferred to the blanket cylinder. 22
It is applied to the paper 13 passing between the and the impression cylinder 11.

Next, the varnish boat 26 and its support device will be explained. A lever shaft 3 is located below the original roller 25.
0 is close to the impression cylinder 11 and is pivotally supported by the left and right frames 28 via a bush 31, and movement in the axial direction is restricted by a collar 32. The frame 28 is attached to the free end of the lever 33, which is fixed to the protrusion of the lever shaft 30 from the frame 28 by splitting.
The operating end of a piston rod 36 of an air cylinder 35 is pivotally connected to the lever shaft 30 by a pin 34.
is configured to rotate in forward and reverse directions. A pair of left and right levers 36 are fixed on the lever shaft 30, and the left and right levers 36 swing between the solid line position and the chain line position in FIG.
6a is bored.

On the other hand, a guide 37 as a guide body formed in a box shape is fixed to the inner surface of the left and right frames 28 by bolts, and a guide 37 as a guide body formed in a box shape is fixed to the inner surface of the frame 28 on the left and right sides. pin 39
is being involved. A key 40, which is formed into a rectangular plate shape and functions as a sliding body together with the varnish boat support 38, is fixed to the engaging portion of the pin 39.
is fixed, and the key 40 is configured to engage with and move along a guide groove 41 provided in the guide 37. On the varnish boat support stand 38,
Another pin 42 is implanted on the opposite side of the pin 39, and this pin 42 is connected to the elongated hole 36a of the lever 36.
has been involved. The varnish boat 26 is formed in the shape of a gutter, and a support plate 43 that is slightly longer than the varnish boat 26 is integrally formed on its bottom plate, and an insertion plate 44 is integrally formed on the protrusion from the varnish boat 26. has been done. Furthermore, an L-shaped clamping plate 45 is fixed to the varnish boat support 38 with a gap provided between it and the upper surface of the varnish boat support 38, and the varnish boat 26 holds the insertion plate 44. It is configured so that it can be attached to and removed from the varnish boat support 38 in the horizontal direction by inserting it into the gap between the clamping plate 45 and the varnish boat support 38. Reference numeral 46 denotes a click mechanism that prevents the varnishing boat 26 from being removed from the varnishing boat support 38 when it is attached, and is composed of a ball that engages with a recessed hole in the insertion plate 44 and a compression coil spring that springs the ball. and is loaded into a hole provided in the varnish boat support 38.

In the printed matter varnishing apparatus configured as described above, when cleaning the varnish boat 26 and the original roller 25, when the air cylinder 35 is started after the varnish 27 in the varnish boat 26 is discharged, the lever 3
6 rotates clockwise from the solid line position in FIG. 3, and the key 40 moves obliquely downward along the guide groove 41 due to the engagement between the pin 42 and the long hole 36a, and
The lever 36 and the varnish boat support 38 move to the position shown in chain lines in FIG. Accordingly, the varnishing boat 26, which is integrated with the varnishing boat support 38, also moves to the position indicated by the chain line in FIG. In this case, since the key 40 is guided by the guide groove 41, the varnishing boat 26 does not rotate and its top surface maintains a horizontal state, so the varnishing boat 26 also moves in parallel and its bottom plate maintains a horizontal state. do. After moving, the varnishing boat 26 can be easily removed by holding it with both hands and pulling it out to the right in FIG. 3 against the gripping force of the click mechanism 46. After that, by cleaning the varnishing boat 26 and the original roller 25, attaching the varnishing boat 26 to the varnishing boat support 38, and operating the air cylinder 35 in the opposite direction, it is possible to easily return to the varnishing work position. can. In addition, if the original roller 25 has a hardened coating of varnish and only the original roller 25 is to be cleaned, the varnishing boat 26 is moved in parallel diagonally downward by the above operation while the varnish 27 is placed in the varnishing boat 26. By maintaining the varnish boat 26 in a horizontal state, the varnish 27 will not spill.

In this embodiment, a long hole 36a is provided on the lever 36 side, and a pin 42 is provided on the varnish boat support 38 side.
Although an example has been shown in which a pin is provided and engaged, this may be reversed, and a pin may be provided on the lever 36 side and engaged with a long hole or long groove provided on the varnish boat support 38 side. Further, although this embodiment shows an example in which the present invention is installed in a varnishing unit of a printing press, it can be similarly implemented in an independent varnishing machine or in a varnishing device that also serves as a water supply device.

[Effect of idea]

As is clear from the above explanation, according to the present invention, in a printed matter varnishing apparatus in which a varnishing boat is disposed below the immovable original roller that is rotatably supported on both sides of the frame, the driving shaft is The sliding body is supported by the swinging lever through engagement with the pin and the elongated hole, and the sliding body is guided in a non-rotatable manner, and the lower part of the original roller is immersed in the varnish by the swinging of the lever. In addition to providing a guide body for parallel movement between the diagonally downward unused position and the varnished boat being detachably attached to the sliding body in the horizontal direction, the water boat and the rotating source inside it are Since the roller is separated by a large distance and the peripheral surface of the original roller is exposed, cleaning of the water boat and the original roller can be performed more easily and reliably than before, improving work efficiency and eliminating paper from unreliable cleaning. It is possible to prevent waste paper from being generated due to dirt. Also,
Even if the varnishing boat is moved with varnish in it, the varnished surface remains in a horizontal state, so work efficiency is improved when cleaning only the original roller, and the original roller can be easily and reliably cleaned.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the apparatus for varnishing printed matter according to the present invention, Figure 1 is a schematic side view of a printing press in which this is implemented, and Figure 2 is a printing unit for the fourth color and varnishing. FIG. 3 is a partially cutaway side view of the varnishing boat and its support device, FIG. 4 is a partially cutaway plan view, and FIG. 5 is a partially cutaway front view. 21...varnishing device, 26...varnishing boat, 27
... Varnish, 28 ... Frame, 30 ... Lever shaft, 36 ... Lever, 36a ... Long hole, 37 ...
Guide, 40...Key, 41...Guide groove, 42...
…pin.

Claims (1)

[Scope of utility model registration request] A base roller 25 that is rotatably supported by both frames 28, 28 and is immovable, a varnish boat 26 disposed below this base roller, and both frames 28,
A pair of left and right levers 36 are rotatably supported on the lever 28.
A lever shaft 30 having a lever shaft 30, sliding bodies 38, 40 supported by the lever 36 through engagement between a pin 42 and a long hole 36a, and a guide groove 41 for non-rotatably guiding the sliding body. Frame 28, 28
a guide body fixed to the inner surface of the lever 3;
A guide body 37 is provided that moves the varnish boat 26 in parallel between a use position where the lower part of the original roller 25 is immersed in the varnish 27 and a diagonally downward non-use position when the lower part of the original roller 25 is immersed in the varnish 27 by the swinging of the varnish boat 26. 38. A printed matter varnishing device characterized in that it is detachably attached in the horizontal direction to 38.