Screen frame fixing device

Abstract

To prevent deviation of printing even when a frame size of a screen frame is different.SOLUTION: A screen frame fixing device 1 attachably / detachably fixes a screen frame 11 stretched with a screen. The screen frame fixing device includes: a U-shaped plate 24 and a finger screw 14 which sandwich a prescribed frame of the screen frame 11 from the outside and inside; and a U-shaped plate 23 and a finger screw 15 each of which is provided with a positioning member 17 for performing positioning of the screen with respect to the screen frame 11 and presses the positioning member 17 to the outside of the prescribed frame of the screen frame 11. The U-shaped plate 24 and the U-shaped plate 23 are independently provided to be slidable and movable in a direction orthogonal to a prescribed longitudinal direction of the screen frame.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a screen frame fixing device that can easily attach and detach a screen frame and prevent displacement of the screen frame.

Background Art

[0002] Conventionally, in screen printing, when performing multi-color printing, it is necessary to align the image positions of each plate.

[0003] Patent Document 1 presents a positioning mechanism. However, in the positioning mechanism of Patent Document 1, the image positions of the respective screen frames may be misaligned, so final fine adjustment of the position is necessary.

[0004] Patent Document 2 presents a mechanism for positioning the positions of a plate-making machine and a printing machine in the XY directions. The problem here is that it is necessary to process the screen frame and attach a positioning member, which requires time and labor for such processing and replacement.

[0005] Therefore, Patent Document 2 describes, as an improved embodiment of this mechanism, a method of fixing with a U-shaped plate and a thumb screw.

[0006] FIG. 1 is a diagram showing the positioning mechanism of Patent Document 2.

[0007] As shown in FIG. 1, the positioning member A12 positions the screen frame A11 using a U-shaped plate A13 and a thumb screw A14.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0009] However, in the positioning member A12 disclosed in Patent Document 2, since the plate-making machine makes plate-making with reference to the outer end surface of the screen frame A11, there is a problem that the plate-making position shifts when the frame size of the screen frame A11 is different.

[0010] FIG. 2(a) shows an example of the case where positioning is performed for the screen frame A11a with a thick frame size, and FIG. 2(b) shows an example of the case where positioning is performed for the screen frame A11b with a thin frame size.

[0011] In FIG. 2(a), a spacer A15 is provided between the screen frame A11a and the U-shaped plate A13, and in FIG. 2(b), a spacer A15 is provided between the screen frame A11b and the U-shaped plate A13.

[0012] A position shift of d11 occurs in the front-rear direction between the position in the front-rear direction of the outer end surface A11a1 of the screen frame A11a with a thick frame size and the position in the front-rear direction of the outer end surface A11b1 of the screen frame A11b with a thin frame size. As a result, there is a problem that the plate-making position shifts.

[0013] At this time, by utilizing the technology of Patent Document 2, the knob screw A14 can also be provided inside the screen frame A11a or A11b. However, since a considerable amount of ink is applied inside the screen frame A11a or A11b, there is a risk of soiling the knob screw A14 during the printing operation. In addition, there is also a risk of damaging the screen when operating the knob screw A14.

[0014] The present invention has been made in view of the above problems, and an object thereof is to provide a screen frame fixing device that prevents printing misalignment even when the frame sizes of screen frames are different.

Means for Solving the Problems

[0015] To achieve the above object, the first feature of the screen frame fixing device according to the present invention is that a screen frame fixing device for detachably fixing a screen frame on which a screen is stretched, a gripping means for sandwiching a predetermined frame of the screen frame from the outside and the inside, a positioning portion for positioning the screen with respect to the screen frame is provided, and a pressing mechanism for pressing the positioning portion against the outside of a predetermined frame of the screen frame, the gripping means and the pressing mechanism are provided so as to be independently slidable in a direction orthogonal to the longitudinal direction of a predetermined frame of the screen frame.

Effect of the Invention

[0016] According to the screen frame fixing device of the present invention, even when the frame sizes of the screen frames are different, printing misalignment can be prevented.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent parts and components are denoted by the same or equivalent reference numerals throughout the drawings. However, it should be noted that the drawings are schematic and different from the actual ones. Also, there are parts where the dimensional relationships and ratios are different between the drawings. Further, the following embodiments illustrate devices and the like for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the arrangement of each component part as follows. The technical idea of the present invention can be variously modified within the scope of the claims.

[0019] FIGS. 3 to 5 are schematic configuration diagrams showing the screen frame fixing device 1 according to the present embodiment of the present invention.

[0020] The screen frame fixing device 1 according to the present embodiment of the present invention positions and fixes the screen frame 11 on which the screen is stretched.

[0021] The screen frame fixing device 1 includes a U-shaped plate 23, a U-shaped plate 24, a fixing screw 25, a knob screw 14, a knob screw 15, and a positioning member 17.

[0022] The U-shaped plate 24 is provided so as to cover a part of the screen frame 11 from above. A knob screw 14 is provided so as to penetrate through a screw hole (not shown) provided in the U-shaped plate 24. When the knob screw 14 is screwed into the screw hole, the tip of the knob screw 14 contacts the front end face of the screen frame 11, and by further tightening the screw 14, the screen frame 11 is clamped from the front and rear directions (outer and inner sides) by the U-shaped plate 24 and the knob screw 14.

[0023] The U-shaped plate 23 is provided with a positioning member 17 for positioning the screen with respect to the screen frame 11.

[0024] The U-shaped plate 23 is provided so as to cover a part of the U-shaped plate 24 and a part of the screen frame 11 from above, and a knob screw 15 is provided so as to penetrate through a screw hole (not shown) provided in the U-shaped plate 24. When the knob screw 15 is screwed into the screw hole, the tip of the knob screw 15 contacts the front end face of the U-shaped plate 23, and by further tightening the screw 15, the U-shaped plate 23 is pressed against the front end face of the screen frame 11. Thereby, the positioning member 17 provided on the U-shaped plate 23 can be pressed against the front end face of the screen frame 11.

[0025] A fixing screw 25 is provided at the upper part of the U-shaped plate 23. With the screen frame 11 clamped from the front and rear directions (outer and inner sides) by the U-shaped plate 24 and the knob screw 14, and with the positioning member 17 pressed against the front end face of the screen frame 11 by the U-shaped plate 23 and the knob screw 15, by tightening the fixing screw 25, the positions of the U-shaped plate 23 and the U-shaped plate 24 in the front and rear directions can be fixed.

[0026] That is, a gripping means for gripping the screen frame 11 by the U-shaped plate 24 and the knob screw 14, and a pressing means for pressing the positioning member 17 by the U-shaped plate 23 and the knob screw 15 against the front end face of the screen frame 11 are provided so as to be independently slidable in a direction (front-rear direction) orthogonal to the frame longitudinal direction (left-right direction) of the screen frame 11.

[0027] FIG. 6(a) shows an example in which positioning is performed on the screen frame 11a with a thick frame size in the screen frame fixing device 1 according to the present embodiment of the present invention, and FIG. 6(b) shows an example in which positioning is performed on the screen frame 11b with a thin frame size in the screen frame fixing device 1 according to the present embodiment of the present invention.

[0028] As shown in FIG. 6(a), the U-shaped plate 24 and the knob screw 14 sandwich the screen frame 11a with a thick frame size from the front-rear direction (outer side and inner side), and the positioning member 17 is pressed against the front end face of the screen frame 11a by the U-shaped plate 23 and the knob screw 15.

[0029] Similarly, as shown in FIG. 6(b), the U-shaped plate 24 and the knob screw 14 sandwich the screen frame 11b with a thin frame size from the front-rear direction (outer side and inner side), and the positioning member 17 is pressed against the front end face of the screen frame 11a by the U-shaped plate 23 and the knob screw 15.

[0030] As a result, as shown in FIGS. 6(a) and 6(b), even when positioning is performed on the screen frame 11a with a thick frame size or when positioning is performed on the screen frame 11b with a thin frame size, the positions of the end faces can be aligned. Specifically, the position in the front-rear direction of the outer end face 11a1 of the screen frame 11a with a thick frame size can be made to coincide with the position in the front-rear direction of the outer end face 11b1 of the screen frame 11b with a thin frame size. Thereby, it is possible to prevent the plate-making position using this screen frame from being displaced.

[0031] Also, in the prior art, as shown in FIG. 2(a), in order to avoid the interference between the inner R (inner wall of the bent portion) of the U-shaped plate and the corner of the frame and prevent it from being set at a predetermined position, a spacer A15 is provided between the screen frame A11a and the U-shaped plate A13. However, in the screen frame fixing device 1 according to the present embodiment of the present invention, the U-shaped plate 24 and the U-shaped plate 23 are provided so as to be independently slidable in a direction (front-rear direction) orthogonal to the frame longitudinal direction (left-right direction) of the screen frame 11. Therefore, it is possible to avoid the interference between the inner R (inner wall of the bent portion) of the U-shaped plate and the corner of the frame. Therefore, there is no need to provide a spacer. (Appendix) This application discloses the following inventions.

[0032] (Appendix 1) A screen frame fixing device for detachably fixing a screen frame on which a screen is stretched, Gripping means for sandwiching a predetermined frame of the screen frame from the outside and the inside, A positioning portion for positioning the screen with respect to the screen frame is provided, and a pressing mechanism for pressing the positioning portion against the outside of a predetermined frame of the screen frame, The gripping means and the pressing mechanism are provided so as to be independently slidable in a direction orthogonal to the predetermined frame longitudinal direction of the screen frame A screen frame fixing device characterized by the above.

[0033] Thus, even when positioning is performed on a screen frame with a thick frame size or on a screen frame with a thin frame size, the positions of the end faces can be aligned in both cases. Therefore, it is possible to prevent the plate-making position using this screen frame from shifting.

Explanation of Reference Numerals

[0034] 1 Screen frame fixing device 11, 11a, 11b Screen frame 11a1, 11b1 End face 14, 15 Knurled screw 17 Positioning member 23, 24 U-shaped plate 25 Fixing screw

Claims

【Claim 1】 A screen frame fixing device for removably fixing a screen frame with a screen stretched thereon, comprising: Gripping means for sandwiching a predetermined frame of the screen frame from the outside and the inside; A positioning portion for positioning the screen with respect to the screen frame, and a pressing mechanism for pressing the positioning portion against the outside of a predetermined frame of the screen frame; The gripping means and the pressing mechanism are provided so as to be independently slidable in a direction orthogonal to the longitudinal direction of a predetermined frame of the screen frame. A screen frame fixing device characterized by the above.

Images