JPS61104885A - Stamp type screen printing machine - Google Patents

Abstract

PURPOSE:To eliminate limits to the size of papers to be printed by providing a holder to attach a screen printing stencil at a place above the printing face of the original stencil. CONSTITUTION:A projection 10 as a holder is provided on the inwardly sloped outer face of side pieces in a print original stencil holder 7. In printing, the projection 10 of the holder 7 is thrust into and fixed to the hole of an original stencil and the hole of a reinforcing piece, and the original stencil 36 is folded from the inside of the reinforcing piece 38 to give it a tension, where the printing face 39 is of a almost plane face. The base 34 of the elastic holder 35 is contacted with 10 lapped papers 44 to be printed, the body 3 is lowered by pushing it downwards by it handle 2, and the holder 7 is lowered by pushing down the holder 7 while elastically deforming the elastic material 23 to make the printing face 39 of the original stencil 36 contact with the papers 44.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stamp-type stencil printer that can easily print using a stencil printing original plate.

(Prior art and problems) In this type of stencil printer, if the stencil printing original plate is held loosely, the patterns of characters, figures, etc. that are to be printed during printing will be deformed and cannot be printed as desired. It is necessary to apply tension to the original plate to hold it. Conventional stencil printers have been unsatisfactory, such as insufficiently holding the stencil printing original plate or requiring a complicated holding device.

A simple method for holding the stencil printing original as desired is to attach the stencil printing original to a rectangular frame flatly without wrinkles. Since the frame is generally made of paper, the flatness of the stencil printing plate can be relatively maintained when drying;
The stencil printing plate expands and contracts due to the influence of moisture in the air, and in humid seasons or regions, the stencil printing plate becomes wrinkled, making it impossible to print as desired or causing misalignment. There are some problems. In order to hold the frame of the stencil printing original plate in a substantially flat shape, a part or all of the holding device installed in the printing machine protrudes almost on the same plane as the printing surface or the paper to be printed. Generally, the size of the paper is limited to a size that does not touch the paper. Therefore, for example, on a printing paper of 35 plate size, 8
If you try to print the size of the 6th plate, parts other than the printing surface will come into contact with the frame or the holding device of the frame, resulting in parts that cannot be printed or The printed paper may be damaged.

Furthermore, even if the size of the printing paper is made small so that it does not come into contact with the frame or its holding device, printing becomes difficult because the holding device comes into contact with the object on which the printing paper is placed. A pedestal for placing the paper to be printed is further provided on this object, and the pedestal is set high enough to prevent the stencil printing original plate from coming into contact with the paper to be printed and part or all of the holding device of the frame body to come into contact with the object during printing. Must.

(Object of the Invention) The present invention improves the above-mentioned drawbacks, and by holding the stencil printing original plate by the holding means of the stencil printing original plate holder, tension is applied to the stencil printing original plate, so that the stencil printing original plate is not stretched. In addition, since the holding means does not protrude in substantially the same plane as the printing surface, the size of the printing paper is not limited.

Therefore, this stencil printer is capable of printing on any part of the paper to be printed, and can print as desired without having any effect on the paper to be printed other than the printing surface.

(Structure of the Invention) The present invention is to attach the stencil printing original plate by applying tension to the printing surface so that the printing surface becomes substantially flat by bending reinforcing pieces fixed to opposite ends of the stencil printing original plate from the inside. A holding means is provided above the printing surface, and an elastic body is provided to separate the printing surface from the paper to be printed. This is a stamp-type stencil printing machine in which a body support is attached to a main body that is relatively movable according to the deformation of an elastic body.

A feature of the present invention is that the holding means for attaching the stencil printing original plate by bending it from the inside of the reinforcing pieces fixed to the opposite ends of the stencil printing original plate is provided at a location above the printing surface of the stencil printing original plate to hold the stencil printing original plate. It is something that is placed on the body. The stencil printing original plate is bent from the inside of the reinforcing piece and tension is applied to it, and the printing surface is kept stretched so that it becomes substantially flat, allowing printing as desired. Furthermore, since the holding means is located above the printing surface, it does not come into contact with the paper to be printed, and the size of the paper to be printed is not limited. When an elastic material is brought into contact with the inner surface of the folded portion of the printing surface of the stencil printing original plate, further tension is applied to the stencil printing original plate due to the pressing force of the elastic material, and the stencil printing original plate becomes further stretched.

One of the means for holding the stencil printing original plate is to provide a stencil printing original plate holder with a protrusion, which is engaged with a hole provided in a reinforcing piece of the stencil printing original plate. The force caused by minute elastic deformation of the stencil printing original plate holder and the force acting on the stencil printing original form a force that maintains the stencil printing original in a substantially flat state. The holding means includes a structure that engages with the stencil printing original plate, a structure that clamps or presses the stencil printing original plate, and may also be a structure that is held with an adhesive tape or a structure that is held with a clip. Furthermore, the retaining means can be made of not only a projection, but also a groove and a projection, or a hole and a projection, which can be made of elastic bodies.

The pressing body is built into the stencil printing original plate holder, and applies a pressing force to the printing surface of the stencil printing original plate during printing to cause printing ink to pass through the printing surface.

During printing, the elastic body presses the paper to be printed or the object on which it is placed, and when the body is pressed down, it elastically deforms so that the printing surface of the stencil printing original plate can come into contact with the paper to be printed, and after printing, it deforms elastically. The recovery causes the printing surface to be separated from the paper to be printed. Various shapes can be used, for example, in addition to the elastic bodies in the embodiments, coil springs can also be used.

The elastic body holder holds the elastic body so that it does not fall down when the main body is pressed down during printing, so that the printing surface of the stencil printing original plate can contact the printing paper without shifting, thereby preventing printing shift.

(Example of the invention) Embodiments of the invention are illustrated in the drawings.

The main body 3, which has a square outer shape and a handle part 2 on the upper surface 1, has a guide groove 5 in the center of one opposing side piece 4 that reaches the inside of the handle part 2, and a rectangular guide groove with approximately the same protruding size as the side piece 4. A protrusion 6 is provided.

A rectangular stencil printing original plate holder 7 whose outer shape is approximately the same as the inner shape of the main body 3 is provided with a rectangular window 8 therein, and a holding means spaced apart on the inwardly inclined outer surface of one opposing side piece 9. The inner surface of the side piece 12 is provided with a protrusion 10 and an inwardly inclined slope 11, and the other opposing side piece 12 is provided with a convex portion 13 on the inner surface and a long groove 14 in the vertical direction at the center of the outer surface.

A pressing body 16 having a bottom portion 15 and having a rectangular outer shape substantially the same as the window 8 of the stencil printing original plate holder 7 is provided with a rectangular window 17 inside thereof, and is opposed to the side piece 9 of the stencil printing original plate holder 7. An inwardly inclined slope 19 is provided on the outer surface of one of the opposing side pieces 18, and a recess 21 corresponding to the convex portion 13 of the stencil printing plate holder 7 is provided on the other side piece 20. A pressing plate 22 made of an elastic body of the same size is fixed.

In the plastic elastic body 23, the first elastic part 24 is a bilaterally symmetrical oval shape, and the part 25 that intersects with the short axis is made thicker to increase the rigidity, and the part 26 that intersects with the long axis is made thinner to reduce the rigidity. The second elastic portion 27 is a symmetrical horizontal piece, and its center portion and the portion 25 of the first elastic portion 24 are connected by a mounting portion 28.

The convex portion 13 is inserted into the recess 21 and the pressing body 16 is inserted into the window 8 of the stencil printing original plate holder 7, and the elastic body 23 is inserted between the protrusions 29 and 30 of the side piece 12 of the stencil printing original plate holder 7. The end portion 31 of the second elastic portion 27 is inserted therein. pin 32, main body 3,
Elastic body 23, long groove 1 of side piece 12 of stencil printing master holder 7
4 and fixed to the side piece 20 of the pressing body 16.

The slope 11 of the stencil printing original plate holder 7 and the slope 1 of the pressing body 16
9 are separated from each other, and the amount of separation is slightly larger than the amount of insertion of the pressing plate 22 of the pressing body 16 into the stencil printing master holder 7.

Two spaced apart upright pieces 33 are raised up from the base 34.

The upright piece 33 of the elastic body holder 35 is inserted into the guide groove 5 of the main body 3 so that it can move up and down, and the base 34 is in contact with the lower part 24a of the first elastic part 24 of the elastic body 23. .

The stencil printing original plate 36 (FIGS. 7 and 8) has a rectangular shape that is slightly longer than the length of the stencil printing original plate holder 7 in the direction of the side piece 12 and slightly shorter than the length of the side piece in the direction of the side piece 9, and has opposite ends of the short sides. 37
A reinforcing piece 38 is fixed to the reinforcing piece 38, and one end 41 of a printing ink-permeable sheet 40 is sized to cover the entire printing surface 39 of the stencil printing original plate 36 except for the reinforcing piece 38.
and both ends 37 and both reinforcing pieces 38,
Corresponding to the protrusions 10 of the stencil printing master holder 7, the protrusions 10
A hole 42 and a hole 43 of approximately the same size are provided respectively.

During printing, printing ink is placed on the perforated portions of the stencil printing original plate 36, in which patterns such as characters and figures have been perforated on the printing surface 39, and the printing surface 39 is covered with a sheet 40. Hole 43 of reinforcing piece 38
The protrusion 10 of the stencil printing original plate holder 7 is inserted through the stencil printing original plate holder 7, and the stencil printing original plate 36 is attached to the stencil printing original plate holder 7 as shown by the chain line in FIG. The printing surface 39 is approximately flat due to the tension applied thereto.

The base portion 34 of the elastic holder 35 is brought into contact with approximately 10 sheets of paper 44 to be printed, and the handle portion 2 of the main body 3 is pressed downward to lower the main body 3, and the first elastic portion of the elastic body 23 24 while elastically deforming the stencil printing original plate holder 7 and the pressing body 16.
Press down to transfer the printing surface 39 of the stencil printing original plate 36 to the printing paper 44
contact with. At this time, the upright piece 33 of the elastic body holder 35
moves upward in the guide groove 5 of the main body 3 (FIG. 9). moreover,
When the handle part 2 is pressed downward, the pin 32 moves down the long groove 14 of the stencil printing original plate holder 7 and presses down the pressing body 16, and the pressing body 22 presses the printing ink through the sheet 40 to release the stencil printing original plate 36. It passes through the perforated portion of the printing surface 39 and is attached to the printing paper 44 for printing.

Lift the handle part 2 upward and remove the base 3 of the elastic body holder 35.
4 is separated from the printing paper 44, the elastic deformation of the first elastic portion 24 of the elastic body 23 is restored, the pressing body 16 is pushed up, and the stencil printing original plate 7 and the pressing body 16 return to their original states. The printed paper 44 is removed. The above operations are repeated to print on all the printing sheets 44.

Instead of the elastic body 23, the first elastic body 23 in FIG.
The elastic body 23□ shown in Figure 1 can be used. The plastic elastic body 23I is attached to the first nose portion 24. The part 26 where intersects with the long axis
．． The second nose portion 27. is made up of a bilaterally symmetrical long interior 24'1 with a thinner wall and a bilaterally symmetrical contact piece 24t provided at the bottom thereof. is a symmetrical horizontal piece, and the portion 251 where its center intersects with the short axis of the long interior 24+ of the first nose portion 241 is the attachment portion 28. It is a continuous succession. Since the contact piece 241 has a shape that protrudes symmetrically from the bottom of the long interior 24', the force that separates the stencil printing original plate 36 from the printing paper 44 after printing is large, especially when the printing paper 44 is thin.
When made of paper with low rigidity, the printing paper 44 can be separated from the stencil printing original plate 36 without causing printing misalignment. When the contact piece 241 is made of a thin material, it can be curved upward in a convex shape to exert effective elasticity.

The elastic body 232 has a plastic second nose portion 23 that is symmetrical and has an attachment portion 28 in the center. The metal first nose portion 248 is bilaterally symmetrical, and both ends thereof are inserted into the mounting portion 28□. In this case as well, the elastic body 23. contact piece 24. A metal or plastic contact piece, such as the contact piece 24., can also be attached by screwing, heat welding, or other means.
can exert the same effect.

(Effects of the Invention) In the stencil printer of the present invention, the stencil printing original plate is attached to the stencil printing original plate holder so as to be substantially flat, and the elastic body is held by the elastic holder so that it does not fall down, thereby preventing printing misalignment. You can print as desired without any problems.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the stencil printer of the present invention, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a sectional view taken along line 4-4 in FIG. 3, and FIG. 6 is a sectional view taken along line 5-5 in the figure, FIG. 6 is a sectional view taken along line 6-6 in FIG. 3, and FIG. 7 is a plan view of the stencil printing original plate.
FIG. 8 is a front view, FIG. 9 is a front view of the stencil printer during printing, and FIGS. 10 and 11 are front views of other embodiments of the elastic body. 3... Main body, 7... Stencil printing plate holder, 10...
・Protrusion, 23... Elastic body, 36... Stencil printing original plate,
38... Reinforcement piece, 39... Printing surface, 44... Printing paper. Patent applicant Pilot Mannen Pen Co., Ltd. Figure 7 Cutting Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] A holding means is attached to the stencil printing original plate by bending it from the inside of reinforcing pieces fixed to opposite ends of the stencil printing original plate and applying tension to the printing surface so that the printing surface thereof becomes substantially flat. A stencil printing original plate holder provided above and further provided with an elastic body that separates the printing surface from the printing paper, and a stencil printing original plate holder having a built-in pressing body that applies a pressing force to the printing surface, and an elastic body support that supports the elastic body. A stamp-type stencil printer, wherein the stamp-type stencil printer is attached to a main body so as to be relatively movable according to the deformation of the elastic body.