JPH0217876Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a screen printing machine that prints thin plate material for printed wiring boards that is continuously and automatically conveyed onto the printing table. A screen printing machine that uses multiple material conveying tools to carry materials upward, and the interval between these conveying tools can be adjusted as appropriate, making it possible to flexibly respond to conveying materials of different sizes. Regarding improvements.

Conventionally, it is widely known that multiple conveyors, such as belts, are used to carry the material onto the printing table and, after the printing process is completed, to transport the material to the next processing step. . Further, it is widely known that the conveyor is configured to be recessed from the surface of the printing table during printing and exposed after printing is completed. However, in conventional printing machines of this type, although the carriers can be moved up and down in relation to the printing table, they are often unable to move parallel to each other, which makes it difficult to adjust the spacing between the carriers. This impossibility makes it inconvenient to handle materials of different sizes, and if there is a significant difference in size, one cannot be handled by the printing machine.

The present invention is intended to improve these drawbacks of the prior art, and is intended to facilitate and easily handle materials of different sizes using the same conveyor.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a schematic top view illustrating a screen printing machine immediately before a thin plate material M for a printed wiring board is conveyed onto a printing table 1. FIG. In the figure, 2 is material M
3a and 3b are position regulating members that regulate the position of the material M in the direction perpendicular to the direction of movement of the material M. When abutted, the movable position regulating member 3b moves in the direction of the arrow with respect to the fixed position regulating member 3a to regulate the position. After the position control in the direction perpendicular to the direction of movement is completed, the material is secured on the printing table 1 by appropriate means, such as negative pressure suction or positioning pins. After being secured in a predetermined position on the printing table 1, a predetermined pattern of electrical circuits is screen printed on the surface of the material. At this time, the material transport tool 4 carrying the material M onto the printing table 1
is immersed from one side of the printing table (see Figure 2).

In the figure, S is a screen version and SQ is a squeegee. After printing is completed, the material M is transported to the next processing step using the same material transport tool 4 that was used when it was transported onto the printing table 1. On one surface of the printing table, there are two or more grooves 5 facing in the direction of movement of the material M,
However, the spacing between the grooves 5 is preferably as small as possible. In other words, it is better to have as many grooves 5 as possible.

The material conveyance tool 4 is configured to be rotatable within a groove 5 provided on one surface of the printing table. Material conveyance tool 4
Although the structure may be determined as appropriate, the structure shown in FIG. 3 is used here. In other words, the material conveying tool 4 that rotates within the groove 5 consists of a belt-shaped belt 4a and a pulley 4b on which the belt 4a is hooked, and is arranged in the advancing direction of the groove 5 and outside the opening 5a. The drive shafts 6 and 7 receive power to rotate within the respective grooves 5. Therefore,
The material conveying tool 4 can be moved into any of the grooves 5 as appropriate and can also be rotated within the groove 5. Reference numeral 8 denotes a power source for drive shafts 6 and 7 that rotate outside both ends of the groove 5. The structure for attaching and detaching the material conveying tool 4 to the drive shafts 6 and 7 may be any suitable structure.For example, as shown in the third figure, the material conveying tool 4 may be attached to and removed from the drive shafts 6, 7 in a direction perpendicular to the groove 5 of the printing table and outside the opening 5a of the groove. A recess 6 having a V-shaped cross section is formed on the circumferential surface facing the groove opening 5a of the drive shaft 6, 7 provided.
a, 7a, and a resilient member 9 provided on the pulley 4b that always springs toward the center thereof may be engaged. Reference numeral 10 denotes a key that fits into key grooves 6b, 7b provided in the axial direction of the drive shafts 6, 7, and restricts rotation of the pulley 4b relative to the drive shafts 6, 7. Thus, in order to move the material conveyance tool 4 from one groove 5 to another groove 5, the material conveyance tool 4 is pushed somewhat forcibly in the axial direction of the shafts 6, 7, and the pulley 4b
The resilient member 9 is inserted into the recesses 6a of the drive shafts 6, 7,
recess 6a of the drive shafts 6, 7 at a position facing the opening 5a of the desired groove 5, separated from 7a;
All that is required is to engage the resilient member 9 with 7a.

Note that the material conveying tool 4 and the printing table 1 have different positional relationships with each other before and after the printing process, and during printing, the material conveying tool 4 sinks into the groove 5 of the printing table 1, Groove 5 after printing is completed
It is designed so that it is exposed from In this case, either the material conveyance tool 4 or the printing table 1 may be moved up and down, and the drive mechanism thereof may also be determined as appropriate. Now, when it is necessary to print from a large-sized material that covers the entire surface of the printing table 1 to a relatively small-sized material, move one material conveying tool 4 at one end of the printing table 1 to the adjacent groove 5. Alternatively, it is sufficient to move to the next groove 5 and adjust the distance between it and the other material conveyance tool 4 that was not moved. In this way, even materials of different sizes are reliably transported onto the printing table 1, and after the printing process is performed, they are transported again to the next processing step using the same material transport tool 4.

As described above, in this case, a plurality of grooves are bored in the surface of the printing table, a drive shaft is disposed perpendicularly to the grooves and outside the opening, and a plurality of material conveying tools are attached to the drive shaft. The screen printing machine is equipped with movable and rotatable parts within the groove, so the distance between the material conveying tools can be adjusted as appropriate, and the conveyance process of materials of different sizes can be carried out flexibly. can now be obtained easily and easily.

[Brief explanation of drawings]

Figure 1 is a partially omitted top view illustrating the outline of the printing press related to the present invention, Figure 2 is a schematic explanatory diagram of the relationship between the printing table, the materials on the printing table, and the screen plate, and Figure 3. , 2 are explanatory diagrams of the relationship structure between the material conveyance tool and the drive shaft in FIG. 1. 1...Printing table, 4...Material conveyance tool, 5
... Groove, 5a... Opening, 6, 7... Drive shaft.

Claims (1)

[Scope of utility model registration request] Materials that are continuously and automatically carried onto the printing table by multiple carriers are printed on this printing table, and the carriers are recessed from the printing table surface during printing, and removed from the printing table surface after printing is completed. In a screen printing machine that exposes
A plurality of grooves 5 facing the direction of movement of the material M are bored at appropriate intervals on one surface of the printing table.
Drive shafts 6, 7 are disposed at right angles to the opening 5a and outside the opening 5a, and a plurality of materials are movable along the drive shafts 6, 7 and rotatable within the respective grooves 5. Transport tool 4
A screen printing machine characterized in that the drive shafts 6 and 7 are equipped with: