JPS5810230B2 - Squeegee rubber holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a squeegee rubber holding device used in a screen printing machine for printing patterns on thick film circuit boards and the like.

In conventional screen printing machines of this type, squeegee holding devices having structures as shown in FIGS. 1a to 1d have been widely used.

That is, a pair of side plates 1a and 1b in which V-shaped grooves are formed along the longitudinal direction are put together so that the V-shaped grooves face each other, and the pair of side plates 1a and 1b are integrally connected with screws 2. ,
It constitutes a holding device having four-sided grooves 3 for supporting the squeegee rubber.

When attaching the prismatic squeegee rubber 5 shown in the figure to this holding device 4, once the screws 2 connecting the pair of side plates 1a and 1b are loosened, the squeegee rubber 5 is inserted into the four-sided groove 3 in the direction of the arrow shown in the figure. After the squeegee rubber 5 was positioned in a well-balanced manner at the center of the holding device A, the screws 2 were tightened again.

However, the conventional squeegee rubber holding device described above has caused the following inconveniences.

In other words, in the holding device 4 having the above structure, when the screw 2 is tightened with respect to the cross-sectional area of the squeegee rubber 5, the squeegee rubber 5 is distorted by the difference in the cross-sectional area of the four-sided tank 3, and the squeegee rubber 5 is held by the pressure generated thereby. It is held by the device 4, and therefore, variations in the squeegee rubber 5 cause variations in the tightening pressure.

At this time, when the tightening pressure is low, the squeegee rubber 5 cannot maintain a secure holding state, and when the tightening pressure is high, the central part of the edge, which is the difference part of the squeegee rubber 5, expands greatly to the outside of the holding device A. The linearity of the difference portion will be impaired.

Therefore, in order to obtain a squeegee with excellent linearity using the holding device with the above-described structure, the squeegee rubber 5 must be held with minimum tightening pressure while ensuring the holding force required to hold the squeegee rubber 5. It won't happen.

However, in the holding device with the above-mentioned structure, it is difficult to control the pressure for such delicate tightening. I was having trouble getting a good squeegee.

This invention was made in view of the above circumstances, and it is possible to securely and easily hold the edge portion of the squeegee rubber with good linearity, thereby providing excellent linearity and good operability. It is an object of the present invention to provide a squeegee rubber holding device that allows a squeegee to be easily obtained.

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 2a and 2b show each block of the squeegee rubber holding device according to the present invention, where 11 is the main body of the holding device, and 21 is a presser plate accommodated in the main body 11. FIG.

The main body 11 has a connecting portion 12 that is connected to a fixing pin of a squeegee head (not shown), and a hollow portion 13 into which the presser plate 21 and the squeegee rubber described later are inserted and supported. are the bin guide hole 14 into which the fixing pin of the squeegee head is inserted and the pin holding bolt 1
5 is provided in the hollow part 13, and a slit-shaped opening 16 from which the apex edge part that becomes the cylindrical part of the squeegee rubber protrudes.
is formed, and tapered surface portions 17, 17 that make surface contact with the squeegee rubber are formed sandwiching the opening 16.

The presser plate 21 also includes a slit-shaped cutout groove 22 from which the apex portion opposite to the apex portion that becomes the cylindrical portion of the squeegee rubber protrudes, and a tapered surface portion 2 that makes surface contact with the squeegee rubber.
3, 23 are formed.

As shown in FIG.
2 faces the opening 16 of the hollow part 13.
After being inserted into the hollow part 13 of 1, the position is regulated by a stopper member 31 so that the position does not shift in the longitudinal direction.

Therefore, the presser plate 21 inserted into the hollow part 13 of the main body 11
is movable within the hollow portion 13 only in the direction of the opening 16 (in the vertical direction).

Furthermore, the connecting portion 12 of the main body 11 shown in FIG. The amount of movement is now regulated.

Thus, the tapered surface portion 23°2 formed on the presser plate 21
3 and the tapered surface portion 1 formed in the hollow portion 13 of the main body 11
7 and 17 form a four-sided groove 32 for supporting the squeegee rubber.

Further, an opening 16 provided in the hollow portion 13 of the main body 11
The width W1 is the width W of the cutout groove 22 provided in the presser plate 21.
Therefore, when the squeegee rubber is supported within the four-sided groove 32, the area of the squeegee rubber exposed from the opening 16 is extremely small.
The area of the squeegee rubber that protrudes from 2 is relatively large.

When attaching the squeegee rubber to the squeegee rubber holding device having such a structure, first loosen the holding plate adjustment bolts 18, and then, as shown in FIG.
With the rubber squeegee 33 facing upward, a square column-shaped squeegee rubber 33 is inserted into the four-sided groove 32 from the direction of the arrow shown in the figure, and is positioned in a well-balanced manner in the longitudinal center portion of the main body 11.

Next, as shown in FIG. 5, the torque driver 34 is set to an appropriate torque with the opening 16 of the main body 11 facing downward.
Tighten the holding plate adjustment bolts 18.

As a result, the squeegee rubber 33 is held in the state shown in FIG.

With such a holding means, distortion of the squeegee rubber 33 due to pressure during tightening is absorbed by the notch groove 22 which is wider than the opening 16, and therefore, the apex portion of the squeegee rubber 33 forming the cylindrical portion is aligned with the opening with high precision. It is exposed from 16.

Furthermore, since the structure is such that the presser plate 21 is slid in the direction facing the opening 16 (vertical direction) to press the squeegee rubber 33 in the direction of the opening, the presser plate adjustment bolts 18...・For tightening, the holding pressure can be set arbitrarily by controlling the torque.
Therefore, the holding plate adjustment bolt 18 for proper holding force...
By measuring the tightening torque in advance, you can always easily set the appropriate holding force.

As described in detail above, according to the present invention, the edge portion of the squeegee rubber, which becomes the cylinder, can be held securely and easily with good linearity, thereby providing a squeegee with excellent linearity and good operability. It is possible to provide a squeegee rubber holding device that can easily obtain the following properties.

[Brief explanation of the drawing]

1A to 1D are a perspective view and a sectional view showing a conventional squeegee rubber holding device, and FIGS. 2 to 6 are a perspective view and a sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Main body, 12... Joint part, 13... Hollow part, 16... Opening part, 17, 17, 23, 23... Taper surface part, 18... Bolt for presser plate adjustment, 21...
Holding plate, 22...notch groove, 32...four-sided groove, 33.
... Squeegee rubber.

Claims (1)

[Claims] 1. A main body provided with a hollow part having a slit-shaped opening along the longitudinal direction and a tapered surface formed between the openings, and a main body that is fitted into the hollow part of the main body, and the above-mentioned opening There is a slit-shaped notch groove on the surface facing the
a presser plate having a tapered surface formed by sandwiching the
a support mechanism that supports the presser plate on the main body so as to be movable and adjustable in the direction of the opening; 1. A squeegee rubber holding device comprising: a prismatic squeegee rubber from which the squeegee rubber is protruded and supported.