JPH033585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing apparatus for building materials, such as a gravure offset printing machine.

In the conventional printing method for decorative laminates, a plate is sandwiched between the printing roll and receiving roll of each printing machine, and a pattern is printed on the surface of the plate at the same time as the plate is conveyed under pressure. Since the receiving roll is a flat roll made of steel, slips occur between the plate and the plate while the plate is being conveyed under pressure.

In addition, the frictional resistance generated between the plate and the roll changes partially due to the external shape such as warping and uneven thickness of the plate, and as a result of differences in the pressing force of each printing machine and wear of the roll, Similarly, slips occur. Furthermore, there is a tendency for the plate-shaped body to be conveyed while sliding from side to side. This causes printing misalignment.

In addition, as in Patent No. 1139440, a sheet member having several sandpaper-like fine protrusions is wrapped around the circumferential surface of the receiving roll, and thin needle-like members are further implanted on the surface of the sheet member. Gravure offset printing machines are known. In this known technique, when a plate-like body having a light specific gravity or a plate-like body having a short length is used, there is no occurrence of pattern displacement, and the plate-like body can be effectively used.

In other words, when the plate-like body is light and short, the needle-leaf member is formed on the circumferential surface of the receiving roll, so that the needle-leaf member is formed parallel to the receiving roll in the axial direction at the contact surface (line contact) with the plate-like body. This prevents slipping, but if the plate is thick and long, the part that is not sandwiched between the printing roll and the receiving roll will be long, so it is easy to cause sideways movement during conveyance printing, and the needle material is It is easy to get damaged or misalign the pattern.

In order to solve the above-mentioned problems, a printing apparatus of this type has been proposed, as in Japanese Utility Model Application Laid-Open No. 53-85202, in which the plate material to be printed is pushed by a dog and sucked onto the upper surface of a feeding conveyor.

However, with this prior art, it is necessary to perform suction and fixation intermittently in front of multiple printing machines, which not only complicates the structure, but also prevents the suction from working at the time of printing with the printing rolls. If the dog is only pushed forward, the problem remains that it becomes unstable and misalignment of printing cannot be avoided.

It is an object of the present invention to solve the problems of conventional printing devices of this type as described above. That is, as described below, the present invention attempts to eliminate slips and horizontal sliding of the plate-like body 1 by printing while the spikes 6 of the conveyor 7 are stuck into the back surface of the plate-like body 1. It is something.

(Description of Embodiment) First, the first embodiment shown in FIGS. 1 and 2 will be described.

A plate-shaped body 1 serving as a substrate for a decorative board is pushed to a conveyor 2 with a chipper provided upstream of a conveyor 7 for printing, and then fed into the conveyor 7 for printing. The speed of the conveyor 2 with a marker is adjusted so as to send the plate-shaped body 1 to the printing machine A in accordance with the position of the pattern on the surface of the printing roll 4 of the gravure offset printing machine A. The plate-like object 1 is conveyed by a chipper 3 of a conveyor 2 with a chipper,
It is placed on a printing conveyor 7 that is driven at approximately the same speed as the conveyor 2 with a sticker. Spikes 6 are embedded in the printing conveyor 7, and the chain of the conveyor 7 runs within a groove 9 carved on the circumferential surface of a receiving roll 8 of the printing machine A. It extends to the downstream side of printing press A.

The plate-shaped body 1 is conveyed by a conveyor 2 with a chipper, and as shown in FIG. Since it is held by the receiving rolls 8, the spikes 6 installed in the chain of the conveyor 7 are reliably pierced into the back surface of the plate-like body 1.

On the other hand, the conveyor 7 with a chipper that has pushed the plate-like object 1 sinks below the conveyor 7.

The plate-like object 1 sent into the printing machine A is conveyed with the spikes 6 embedded in the chain of the printing conveyor 7 stuck into the back side.

A desired pattern is printed on the surface of the plate-shaped body 1 held between the receiving roll 8 and the printing roll 4. Ink for printing is stored in an ink tank 5 and transferred to a printing roll 4 via an applicator roll 11 and a gravure printing cylinder 10.

In the drawings, 12 is a blade that cleans the surface of the printing roll 4, and 13 is a blade that wipes excess ink from the cylinder 10.

The conveyor 7 is generally a chain conveyor, but is not particularly limited to a chain conveyor.

Spikes 6 are connected to conveyor 7 or receiving roll 8
It is provided so as to protrude about 1 to 2 mm from the upper surface of the.

The spikes 6 are provided so that they can be replaced as appropriate depending on the material or thickness of the plate-like body 1.

In the printing press of the present invention, one printing press A is installed on one conveyor 7 as shown in FIG. 3, and these conveyors 7 may be connected, or as shown in FIG. It is also conceivable that a plurality of printing machines A are used in conjunction with each other.

(Effects of the present invention) Since the plate-shaped body 1 is printed with the spikes 6 stuck on the back side, no slip occurs between the printing conveyor 7 and the plate-shaped body 1, and printing misalignment does not occur. .

In addition, the present invention has realized that even if the back surface of the plate-shaped body 1 is pierced with a spike 6 and damaged in order to stabilize its position, there is no restriction on its use as a decorative board.
This is something I came up with. Conventionally, this method of stabilizing the position of a plate-shaped body has not been noticed. That is, by deliberately damaging the back surface, there is an advantage that the printed pattern on the front surface becomes more beautiful.

[Brief explanation of the drawing]

Figure 1: Front view of a printing press according to the first embodiment of the present invention,
Fig. 2: An enlarged view of the main parts of Fig. 1, Fig. 3: A front view of the second embodiment, Fig. 4: A front view of the third embodiment, 1... plate-like body, 2... shell conveyor with
3... Printing roll, 4... Ink tank, 6... Spikes, 7... Printing conveyor, 8... Receiving roll, 9... Groove, 10... Cylinder, 11... Application roll , 12...blade of printing roll 4, 13...blade of cylinder 10, A...gravure offset printing machine.

Claims (1)

[Claims] 1. A conveyor 2 with a chipper is provided on the upstream side of the printing machine A to feed the plate-shaped body 1 to the printing machine A at a fixed timing corresponding to the pattern position of the printing roll 4, and A groove 9 is carved in the receiving roll 8, and a printing conveyor 7 is provided which passes through the groove 9 and passes continuously under the printing machine A, and this conveyor 7 is provided with a printing conveyor 7 that pierces the back surface of the plate-like object 1 during printing. A printing device for building materials, such as a gravure offset printing machine, characterized by having a plurality of spikes 6 protruding therefrom.