JP5043970B2 - Tension frame and template - Google Patents

Description

  The present invention relates to a template that is stretched on a tension frame mainly in screen printing.

  Among the printings conventionally known, there is screen printing, and recently, it is often used for pattern formation of printed wiring and circuit formation of hybrid ICs. The details of this screen printing will be explained. For example, as shown in Patent Document 1 below, a pattern window to be printed on a plate of a thin metal plate such as stainless steel is etched or etched with a laser cutter. A template is formed, and a frame is formed by pasting the template with this pattern on the center of a separately prepared window frame-shaped extension frame. This frame is used as a printed circuit board material. The ink is printed on the surface of the printing material with a spatula called a soft squeegee.

  In the actual screen printing, a pattern opened on a metal plate must be faithfully printed on a printing surface. For this purpose, the ends of the four tension members are combined like a window frame, and the area of the central window portion of the tension frame combining these tension members can be slightly expanded. After fixing the periphery of a thin metal plate with a pattern on the installation frame, spread the extension frame slightly outwards, and stretch the extension template firmly on the extension frame. Constitute.

Japanese Patent Laid-Open No. 08-290687

  However, in such a conventional example, when tension is applied to the entire periphery of the rectangular metal plate and the periphery is fixed along the template mounting surface formed on the tension frame, the corner of the metal plate has X A large tension is applied in the direction and the Y direction, and the template is easily torn from this part. In addition, the template tension projection provided on the tension member is inclined outside the tension frame so that it does not get in the way during printing. If the inclined surface is formed so that the head of the projection does not protrude from the surface of the tension frame, ridges are formed at the four corners of the excessively extended template, and these ridges protrude toward the printing surface from the template surface. End up. In the conventional example shown in Patent Document 1, the thin slit portions (15) are formed at the four corners of the metal plate. However, this does not avoid the above-described inconveniences, and between the sides of the template. It is intended to make it easier to stretch the template on the stretched frame by partially cutting it off by the slit portion and separating it one by one.

  Although the thing of this patent document 1 can stretch a thin template to the center part of a tension | tensile_strength frame for the time being, the tension | tensile_strength is not applied equally to the circumference | surroundings of a metal plate only by such a structure, In particular, the central part of the peripheral edge of the template is slack, and the pattern formed on the template may not be accurately printed on the substrate. Moreover, since this slit part (15) is thin groove shape, there exists a fault which a metal plate cracks from the deep part of this slit part during use, and a template cannot be used.

  In addition, when a template made of a synthetic resin film on which an original image is formed is stretched on a stretched frame and the original image is transferred onto a wiring board, the template of the synthetic resin film is stretched on the stretched frame. In the case of installation, the same disadvantages as described above occur.

  An object of the present invention is to eliminate the above-described conventional drawbacks, and an object of the present invention is to transfer a plurality of patterns onto a transfer target using a tension frame in which a template on which a pattern is formed is stretched. The present invention aims to provide a template that can be tensioned with a uniform tension on the entire inner surface of the tension frame.

  In order to achieve the above object, the present application provides inventions described in (1) to (9) below.

(1) The tension members arranged in a rectangular shape are provided with a plurality of tension protrusions that engage the engagement holes of the template, and the tension protrusions are separated from the central portion of the tension frame member toward the end portion. A tension frame arranged in an arc located inward.

(2) The tension frame according to (1), wherein the tension protrusions are arranged in a line.

(3) The tension frame according to (1), wherein the tension protrusions are arranged in two or more rows.

(4) The tension protrusion has a cylindrical shape, and has a base portion, a head portion, and a body portion that locks a base plate having a smaller diameter than the base portion and the head portion. ) Tension frame.

(5) The tension frame according to (1), wherein tabs are provided at the four corners of the rectangular shape to cover the corners of the rectangular template.

(5) A plurality of engagement holes to be engaged and pulled by a plurality of tension protrusions arranged in an arc shape as they are separated from the central portion of the tension member arranged in a rectangular shape toward the end portion. A rectangular template placed on the periphery,
The edges on the pulled side of the plurality of engagement holes are arranged in a straight line, and the length in the pulled direction is increased from the center of the side of the rectangular template toward the end. Characteristic template.

(7) The template according to (6), wherein the engagement holes are arranged in a line.

(8) The template according to (6), wherein the engagement holes are arranged in two or more rows.

(9) The mold according to (6), in which a stress removing portion in which four corners of a rectangular shape are notched is provided, and a boundary line where the stress removing portion is in contact with the template is a line not including an acute angle. Board.

  In the present invention, when the template is stretched on the tension frame, the distance that the tension projection pulls the engagement hole is so small that the distance from the central portion of the tension member toward the end portion is increased. When it is stretched, the template can be stretched evenly on the stretch frame without causing slack in the vicinity of the central portion around the template.

  In another invention of the present application, in addition to the effects of the invention described above, the template has a stress removing portion with a corner notched, so that unnecessary stress does not occur on the entire surface of the template. For this reason, the template can be stretched with respect to the stretch frame without causing unnecessary damage to the template.

FIG. 1 is a plan view of a template. FIG. 2 is a plan view of the tension frame. FIG. 3 is a cross-sectional view illustrating the flange of the tension frame. FIG. 4 is a cross-sectional view showing the engaging protrusion. FIG. 5 is an explanatory diagram of various engagement holes formed in the template. FIG. 6 is an explanatory diagram for explaining various arrangements of the engagement holes. FIG. 7 is an explanatory diagram for explaining the shape of the stress removing unit.

  A pattern window to be printed on a material made of a thin metal plate or synthetic resin plate, such as stainless steel, is pre-etched by etching or laser cutter to form a template, and a separately prepared window frame-like stretch frame In the duplication of an image, a template having this pattern is attached to the central part of the frame to form a frame, the frame is placed on the surface of the subject, and ink is transferred to the surface of the subject with a spatula called a soft squeegee. The template used for the duplication has a plate-like shape, an engagement hole that engages with the tension frame around the periphery, and a stress removal portion that removes the stress of tension at the corner. In the tensioned state, the distance by which the tension projection provided on the tensioning frame pulls the engagement hole is smaller from the central part of the tensioning member forming the tensioning frame toward the end, and the corner is cut off. Missing strike Scan removal unit and border the stress removal unit is in contact with the template is the type plate that stretched to the frame, which is a line that does not contain an acute angle.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a template according to the present invention stretched on a tension frame for printing. The template 1 is a stainless steel material having a thickness of about 0.15 mm as a center and a thin plate having thicknesses before and after this is cut into a square, particularly a square, and the peripheral edges 1 a, 1 b, 1 c, 1 d forming the peripheral edge thereof. Have

  The template 1 has a large number of engagement holes 2 formed along the periphery thereof. In the pattern area 3 in the central portion of the template 1, a pattern hole that represents a pattern to be printed is formed by an appropriate method such as etching or laser cutter.

  Next, the arrangement and shape of the engagement holes 2 formed in the peripheral edge of the template 1 will be described. As shown in FIG. 1, in the engagement hole 2, the engagement hole 2a provided at the center of the periphery of the template 1 is a perfect circle having a diameter r, and this diameter r is the head of the tension protrusion 5 engaged therewith. The shape of the part is the same. The structure of the tension protrusion 5 will be described in detail later.

  The diameter r of the engagement hole 2 gradually increases from the central portion of the tension member constituting the tension frame toward the end thereof. And their lower edges are on a straight line.

  Next, the structure of the tension protrusion 5 will be described. Before that, the structure for tensioning the template 1 to the tension frame will be described.

  FIG. 2 is a plan view showing a tension frame for tensioning the template 1. In FIG. 2, the tension frame 7 is configured such that the ends of the four pieces of tension members 8, 9, 10, 11 are connected to each other, and these joints can be slightly approached or separated from each other. After all, the extending frame 7 has coupling interval adjusting means 7 'at the four corners, a through space for extending the template is formed at the center, and the area is variable in a rectangular window frame shape. Is formed.

  Flange 12, 13, 14, and 15 are provided inside the four pieces of tension members 8, 9, 10, and 11, respectively. As is apparent from FIG. 3, these flanges are inclined so as to descend from the central portion of the tension frame 7 toward the respective tension members. Each flange is provided with a tension protrusion 5. The tension protrusions are arranged in a straight line along the longitudinal direction of the tension member, and the top of the tension protrusions is configured not to protrude upward from the surface of the template 1.

  In the present invention, as shown in FIG. 1 and described so far, the diameter r of the engagement hole 2 gradually increases from the center portion of the tension frame toward the end thereof, and one point on the arc. P is located on a dotted line 6 made of a curve. And their lower edges are on a straight line.

  As described above, in the present invention, the formation positions of the one point P pulled by the engagement protrusions of the engagement holes 2 are arranged in an arcuate shape, the portions that contact the engagement protrusions of these engagement holes, and the template The distance from the peripheral edge is made smaller as the distance from the central portion approaches the end. By configuring in this way, when the template 1 is tensioned, the central portion of the periphery is tensioned before the end portion, so that an even tensioning force is applied to the periphery of the template 1.

  In the present invention, as shown in FIG. 4, a head 16, a body 17, and a base 18 are formed on the tension projection 5, and the base 18 is fitted into a hole 19 formed in the flange 12 and driven or caulked. To fix. Thus, if the diameter of the trunk | drum 17 is formed smaller than the diameter of the head 16 of the tension | tensile_strength protrusion 5, the template 1 will be caught in the tension | tensile_strength protrusion 5 and the template 1 may remove | deviate from the frame 7. There is no.

  However, in such a structure, when the template 1 is tensioned to the tension frame 7, the shape of the body portion 17 of the tension protrusion and the engagement hole 2 are different, so that the tension force is concentrated at the point P (FIG. 5). (Refer to a and b), the peripheral edge of the engagement hole 2 may be turned over to change the shape of the engagement hole.

  As a means for solving such inconvenience, as shown in FIGS. 5 c and 5 d, the engagement hole 2 is divided into a portion where the head of the tension protrusion penetrates and a portion where the body abuts when the tension is applied. For example, a snowball type or a long and narrow hole having two parts with different curvatures, and when the template 1 is tensioned as shown in FIGS. It is preferable that the cross-sectional shape of the projection body 17 is the same, and the contact between the peripheral edge of the engagement hole and the tension projection body 17 is made as large as possible.

If this tension state is seen microscopically, since the template 1 has a thickness, the height of the body portion 17 of the tension projection is set to be equal to or greater than the thickness of the template, and the contact area may be increased.
Moreover, the dotted line 6 along the tension protrusion or the engagement hole does not need to be limited to the shape of one arc, and may be any shape as long as it is an arc shape. In any case, it is sufficient that the tension of the stretched template is not uneven. In addition, the tension protrusions and the engagement holes to be arranged are not limited to a single row, and may be, for example, two rows in a staggered manner along the dotted line 6 '(see FIG. 6e). Further, when the template is not strong and the edges of the engagement holes are turned up, a structure in which the engagement holes are arranged in a plurality of rows of 3 rows or more belongs to the scope of the present application.

  In addition, when the structure as described above is taken, when the template is stretched on the tensioning frame, when the template 1 is first overlapped on the tensioning frame 7, all the engagement holes become the heads of the tension projections. This also has the advantage that the template 1 can be easily attached to the tension frame 7. In the above embodiment, the plurality of tension protrusions provided on the tension member are linearly arranged along the longitudinal direction of the tension member and engage with the tension protrusions opened on the periphery of the template. The holes are arranged in an arc shape, and the arc shape is formed so as to be located in the direction of the outer edge of the tension member constituting the tension frame as it moves away from the center portion toward the end portion. A plurality of engaging holes are arranged linearly along the longitudinal direction of the tension member, and a plurality of tension protrusions provided on the tension member are arranged in an arc shape, and the arc shape extends from the center portion to the end portion. It is also possible to adopt a structure opposite to the above-described one in which the tension member is located inward as the distance from the center increases (see FIG. 6f).

  In short, when the arrangement of the engagement holes 2 formed in the template of the present invention described so far is listed, the arrangement as shown in FIGS. 6a to 6f is obtained.

  In addition, the stress relieving part in the present invention becomes a hole when the template is stretched on the tension frame, and an operator may accidentally insert a finger during use, resulting in unexpected injury. At this time, it is preferable that a fan-shaped tab covering the stress removing portion is extended from a part of the coupling interval adjusting means 7 ′ in the vicinity of the stress removing portion so as to fill the stress removing portion.

  The stress removing unit 4 according to this embodiment has a sector shape, and the shape of the portion in contact with the template 1 is an arc shape. However, this shape is not limited to the sector shape. For example, the shape of the cut is shown in FIG. ), As shown in FIG. 7B, the stress relief portion is a triangle t as shown in FIG. 7B, and as shown in FIG. For example, when the peripheral edges 1a and 1c of the template are pulled, the tension is partitioned by a line that does not reach the peripheral edges 1b and 1d of the template, and an acute angle is formed between the lines. And a shape that does not cause cracks in the template 1 due to the tension force.

  As shown in the above embodiment, the present invention has a remarkable effect when used for screen printing. However, it is needless to say that the prospect of the present invention can be applied to drums, drums, shamisen skinning, canvas stretching, design panels, advertising media stretching, etc. Moreover, in the said Example, although the material of a template is stainless steel, it is not restricted to this material, and it cannot be overemphasized that it extends to a cage | basket or a synthetic resin thin film.

DESCRIPTION OF SYMBOLS 1 ... Template 1a ... peripheral 1b ... peripheral 1c ... peripheral 1d ... peripheral 2 ... engagement hole 3 ... pattern area 4 ... stress removal part 5 ... tension protrusion 6. ··· dotted line 7 ··· tension frame 7 '· · coupling interval adjustment means 8 · · · tension member 9 · · · tension member 10 · · · tension member 11 · · · tension member 12 · · · flange 13 · · ·・ Flange 14 ... Flange 15 ... Flange 16 ... Head 17 ... Body 18 ... Base 19 ... Hole

Claims (9)

A plurality of tension protrusions that are engaged with the engagement holes of the template are provided on the tension members arranged in a rectangular shape,
A tension frame in which the tension protrusions are arranged in an arc shape that is located inward as the distance from the central portion of the tension frame member toward the end portion increases. The tension frame according to claim 1, wherein the tension protrusions are arranged in a line. The tension frame according to claim 1, wherein the tension protrusions are arranged in a plurality of rows of two or more rows. The tension frame according to claim 2 or 3, wherein the tension protrusion has a cylindrical shape, and has a base portion, a head portion, and a body portion that locks the base portion and a template having a smaller diameter than the head portion. 2. The tension frame according to claim 1, wherein tabs are provided at the four corners of the rectangular shape to cover the corners of the rectangular template. A plurality of engagement holes to be engaged with and pulled by a plurality of tension projections arranged in an arc shape as they move away from the center to the end of the tension member arranged in a rectangular shape are arranged at the periphery A rectangular shaped template,
The edges on the pulled side of the plurality of engagement holes are arranged in a straight line, and the length in the pulled direction is increased from the center of the side of the rectangular template toward the end. Characteristic template. The template according to claim 6, wherein the engagement holes are arranged in a line. The template according to claim 6, wherein the engagement holes are arranged in a plurality of rows of two or more rows. 7. The template according to claim 6, wherein a stress removing portion having four rectangular corners cut out is provided, and a boundary line where the stress removing portion is in contact with the template is a line that does not include an acute angle.

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