JPH0419957B2 - - Google Patents

Description

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

(Prior Art and Problems to be Solved by the Invention) Conventionally, this type of stencil printing machine uses a relatively high-viscosity ink, a stencil printing original plate formed by perforating the pattern to be printed, and a thin ink-impermeable plate. It is spread between a thick sheet and attached to a press lever rotatably attached to the base, and the stencil printing original plate is pressed and brought into contact with the printing paper placed on the base to perform printing. There are many methods. In this stencil printer, one sheet of printing paper is placed on the base for each printing. After printing,
Even if the stencil printing original plate is separated from the base, the paper to be printed sticks to the stencil printing original plate due to the viscosity of the ink and the adhesive force. To prevent this, double-sided adhesive tape or the like with weak adhesive strength is attached to the base so that the paper to be printed remains on the base even if the stencil printing plate is separated from the base during printing. Therefore, even if many sheets of printing paper are stacked on the base and printed, after printing,
The top printing paper will stick to the stencil printing plate, so 1
Each page is printed, which is troublesome.

Some conventional stencil printers can print by stacking multiple sheets of printing paper on a base, but the more sheets of printing paper you stack, the more the printing position shifts toward the fulcrum of the pressure lever. The printing position for each sheet is different, and it has been impossible to prevent color misregistration when printing is performed several times in order to print in multiple colors.

Furthermore, during printing, the entire stencil printing original plate does not come into contact with the paper to be printed at the same time, but the press lever sequentially contacts one end on the hinge side and the other end on the opposite side, so the amount of printing ink passing through the stencil printing original plate is uneven. There is also the drawback that printing becomes unclear, and this drawback is exacerbated when the number of stacked sheets of paper to be printed increases.

(Means for Solving the Problems) The present invention aims to improve these drawbacks.
In other words, regardless of the number of stacked sheets of printing paper, the stencil printing master is always in contact with and separated from the printing paper in the vertical direction to maintain the printing position accurately and print without color shift, and the amount of ink adhering to the printing paper is uneven. It is possible to print clearly without causing any blemishes, and it is possible to print by placing many sheets of printing paper one on top of the other on the base, and after printing, the top printing paper does not stick to the stencil printing original plate, making it easy to take out. The purpose is to

In the present invention, a stencil printing original holding body holding a stencil printing original is attached to a press lever, and the stencil printing original is brought into contact with and separated from a printing paper placed on a base by operating the press lever. In a stencil printer that prints by letting printing ink pass through it, a base is provided with a vertical guide mechanism for bringing the stencil printing original plate into contact with the paper to be printed from directly above, and a guided device movably engages with the guide mechanism. A slide mechanism and a slide for enabling horizontal movement of the pressing lever caused by a mechanism provided on the pressing lever and engaged with the guide mechanism to move the guided mechanism in the vertical direction with respect to the base. One of the movable and rotatable slidable mechanisms is provided on the base and the other on the press lever, and as the stencil printing original approaches the paper to be printed, the paper to be printed is directed toward the base. This is a stencil printer in which an elastic body that increases pressing force is provided on a stencil printing original plate holder or a pressing lever.

The vertical guide mechanism and the guided mechanism that engages with it can be composed of, for example, a pin and a groove, but other methods include groove fitting with an uneven surface, and a guide pin provided on the press lever in a hole provided in the base. A configuration in which the parts fit and slide can be adopted.

The horizontal sliding mechanism and the slidable mechanism that engages with it can be composed of pins and grooves, for example, but the groove shape can also be of any structure as long as it can absorb the amount of horizontal movement, such as elliptical grooves, oblique grooves, etc. It may also be a circular hole circumscribed by .

There are various suspension methods for the elastic body, and in addition to the embodiments described below, a method using a coil spring or a rubber elastic body can be adopted.

(Function) Since the base is equipped with a vertical guide mechanism that brings the stencil printing original into contact with and separates it from directly above the printing paper, the stencil printing original always remains in contact with the printing paper regardless of the number of sheets stacked. They touch and separate in the vertical direction, ensuring accurate printing position and printing without color shift. During printing, the entire stencil printing original plate comes into contact with the paper to be printed, so that the amount of ink passing through the stencil printing original plate is uniform and clear printing is possible.

The stencil printing original plate holder is provided with an elastic body that increases the force of pressing the printing paper toward the base as the stencil printing original approaches the printing paper, so that the stencil printing original plate is not covered during printing. The elastic body presses and fixes the printing paper before it comes into contact with the printing paper, and the printing paper does not move and there is no color shift until printing is completed. Even if the stencil printing original plate is separated from the printing paper, the elastic body presses and fixes the printing paper, so the printing paper does not stick to the stencil printing original plate, making it easy to remove the printed printing paper. Can be done.

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

In the embodiment shown in FIGS. 1 to 7, a wall 3 is provided on two opposing sides of the base 1. The wall 3 has a horizontal groove 2a serving as a slide mechanism and a vertical groove 2b serving as a guide mechanism on its inner surface. A pin 7, which is a sliding mechanism fixed to a side piece 6 of a pressing lever 5 having a square window 4 inside, is inserted into the groove 2a, and the pressing lever 5 is inserted into the groove 2a.
It is possible to move horizontally and rotate using the fulcrum as a fulcrum.

The stencil printing original plate holder 8 has the following structure. The square outer shape is slightly smaller than the window 4 of the pressing lever 5, and has a square window 9 inside. Spaced projections 13 are provided on the outer surface, and an inclined stopper surface 14 is provided on the inner surface.

The pressing body 15 has the following structure. The square outer shape is almost the same as the window 9 of the stencil printing original plate holder 8, and it has a square window 16 inside, and one opposing side piece 17 has an arc-shaped hole 18 to hold the printing original plate. A raised portion 19 is provided which bulges outward with a width that is approximately the same as the separation width of the raised portions 11 of the body 8. An inwardly inclined slope 21 is provided on the outer surface of the other opposing side piece 20, and a pressing plate covering the window 16 is fixed to the bottom of the side pieces 17, 20, forming a pressing portion 22.

The plastic elastic body 23 consists of a pressurized part 24 and an elliptical elastic part 25 having a flat surface at the bottom, and the end of the pressurized part 24 is inserted into the mounting groove 26 of the side piece 10 of the original holder 8. An elastic body 23 is attached thereto.

The pressing body 15 is inserted into the window 9 of the stencil printing master holder 8, the standing part 19 is inserted between the standing parts 11, and the pin 2, which is a guided mechanism, is inserted into the side piece 6 of the pressing lever 5.
7 is fixed, and one end 27a of the elastic body 23 is fixed.
The pressurized part 24 is inserted through the groove 28 on the outer surface of the side piece 10 of the stencil printing original plate holder 8, and the stencil printing original plate holder 8 is swingable, and the other end of the pin 27 27b is made to protrude from the side piece 6 of the pressing lever 5.

The pin 29 is inserted into the hole 18 of the upright portion 19 of the pressing body 15 and removably screwed to the projection 30 of the side piece 6 of the pressing lever 5, so that the pressing body 15 is movable with respect to the printing original plate holder 8. , and is able to swing relative to the pressing lever 5. In this state, the slope 21 of the pressing body 15 is separated from the stopper surface 14 of the stencil printing original plate holder 8, and the pressing part 22 of the pressing body 15 is separated from the stopper surface 14 of the stencil printing original plate holder 8.
is immersed in the printing original plate holder 8. Slope 21
The amount of separation between this and the stopper surface 14 is slightly larger than the amount of retraction of the pressing portion 22.

When the pressing lever 5 is rotated from the chain line position to the solid line position in FIG. 2, the pin 7 of the pressing lever 5 moves horizontally in the groove 2a of the wall 3 and stops, then rotates and the end 27b of the pin 27 moves from the base. When the pin 29 enters the groove 2b in the wall 3 of the stand 1 and further presses the pressing lever 5 downward, the pin 29 moves through the hole 18 in the upright portion 19 of the pressing body 15 and stops relative to the stencil printing original plate holder 8. It moves together with the stencil printing original plate holder 8 while maintaining the relationship, and after the stencil printing original plate 31 comes into contact with the printing paper 39 and the operation of the stencil printing original plate holder 8 stops as described later, the upright portion 19 is pressed downward. Then, the pressing body 15 descends.

Rectangular stencil printing original plate 31 (Figures 6 and 7)
is slightly longer than the length in the side piece 10 direction of the stencil printing original plate holder 8 and slightly shorter than the length in the side piece 12 direction, and a reinforcing piece 33 is provided on the surface of the opposite end portion 32 in the side piece 12 direction of the stencil printing original plate 31. and one end 35 of a printing ink-impermeable sheet 34 having a size that covers almost the entirety of the stencil printing original plate 31 is fixed between the end 32 of the stencil printing original plate 31 and the reinforcing piece 33. , the reinforcing piece 33 and the stencil printing original plate 31 have holes 3 of approximately the same size as the projections 13 of the printing original plate holder 8.
3a and 31a are provided.

At the time of printing, printing ink is placed on the perforated portions of the stencil printing original plate 31, which has been previously formed by perforating patterns such as characters and figures, and the stencil printing original plate 31 is covered with a sheet 34. Move the pressing lever 5 to the chain line position shown in FIG.
The projections 13 are inserted into the holes 31a and 33a of the stencil printing original plate 31 and the reinforcing piece 33, and the stencil printing original plate 31 is attached to the printing original plate holder 8. About 10 sheets of printing paper 39 of a predetermined size are stacked and placed in the guide 40 of the base 1.

When the pressing lever 5 is positioned at the solid line position shown in FIG. to press. When the pressing lever 5 is further pressed down, the stencil printing original plate holder 8 and the pressing body 15 are both lowered, and the stencil printing original plate 31 comes into contact with the printing paper 39. When the pressing lever 5 is further pressed, the elastic body 23 is covered. Since the end of the pressing part 24 is inserted into the mounting groove 26 of the side piece 10 of the stencil printing original plate holder 8, when the pressing lever 5 is pushed down, the pin 27 as an elastic body pressing means is pressed against the stencil plate. The elastic body 23 is elastically deformed by moving in the long groove 28 of the original plate holder 8, and this elastic deformation force presses and fixes the stencil printing original plate holder 8 against the printing paper 39. During the operation until the stencil printing master holder 8 comes into contact with the printing paper 39, the elastic portion 25 is elastically deformed in response to the depression of the pressing lever 5, but the end portion of the pressed portion 24 is hardly deformed. Therefore, the relative positional relationship between the stencil printing original plate holder 8 and the pressing body 15 does not change, and the force that presses the printing ink is not working. When the pressing lever 5 is subsequently pressed down, the pin 29 is pushed into the hole 18.
is pressed down, thereby pressing the pressing part 22 of the pressing body 15.
The printing ink is pressed through the sheet 34, passes through the perforated portion of the stencil printing original plate 31, and adheres to the printing paper 39 for printing.

When the pressing lever 5 is raised, the elastic deformation of the pressed portion 24 of the elastic body 23 and the elastic deformation of the elastic portion 25 are restored, and first the pressing body 15 that was pressing the printing ink rises, and then While the printing paper 39 is pressed against the base 1 by the elastic recovery force of the elastic portion 25, the stencil printing original plate holder 8 is separated from the printing paper 39 by the reaction force. Since the elastic force of the elastic portion 25 of the elastic body 23 is much greater than the adhesive force of the printing ink in the printed portion, the stencil printing original plate 31 and the printing paper 39 are easily separated. When the stencil printing original plate 31 and the printing paper 39 are separated, if the stencil printing original 31 slides relative to the printing paper 39 and is separated, printing misalignment occurs.
Since the contact portion of the resilient portion 25 of the elastic body 23 with the printing paper 39, or a portion thereof, is a flat surface, the effect is remarkable since the elastic body 23 is kept substantially parallel to the printing paper 39 and is spaced apart from the printing paper 39.

In addition, when the stencil printing original plate 31 and the printing paper 39 are separated, the coefficient of friction is increased so that slippage is less likely to occur on the contact surface between the elastic part 25 of the elastic body 23 and the printing paper 39 due to the adhesive force of the printing ink in the printing part. It is also effective to attach an anti-slip member made of a material such as rubber (for example, rubber) to a part of the elastic part 25.

Printed paper 39 printed by the elastic part 25 of the elastic body 23
After separating the printing paper 39 from the printing paper 39, the printing paper 39 is removed. The above operations are repeated to print on the printing paper 39.

When printing with a squeegee instead of printing by pressing the pressing part 22 of the pressing body 15 described above, the following procedure is performed.

The pin 29 is removed from the protrusion 30 of the pressing lever 5, and the pressing body 15 is removed. The sheet 34 is removed and a stencil printing original plate 31 formed by perforating patterns such as characters and figures is attached to the stencil printing original plate holder 8. The pressing lever 5 is lowered in the same manner as in the printing described above to bring the stencil printing original plate 31 into contact with the printing paper 39,
By placing printing ink on the stencil printing original plate 31 and squeezing it with a squeegee (not shown), the printing ink passes through the perforated portions and adheres to the printing paper 39 for printing. The press lever 5 is raised to separate the elastic part 25 of the elastic body 23 from the printed paper 39, and the printed paper 39 is taken out. This operation is repeated to print on the printing paper 39.

The embodiments shown in FIGS. 8 to 10 have almost the same construction as the previous embodiments, except that the holes 18 in the upright portion 19 of the pressing body 15 are not provided and the pins 29 are not used. The elastic body pressing means and the pressing body pressing means are constructed as follows. The pin 41 is inserted through the pin 27 of the stencil printing master holder 8 and the side surface 17 of the pressing body 15, and is inserted into the pressing lever 5.
The end 41a of the pin 41 protrudes from the side 6 and functions similarly to the end 27b of the pin 27. A long hole 42 containing a pin 41 is provided in the side portion 10 of the printing original plate holder 8.
is inserted into the hole 42 provided in the side piece 17 of the pressing body 15, so that the stencil printing original plate 31 is inserted into the printing paper 3.
Even after overlapping with 9, the press body 15 descends in response to the press of the press lever 5. The pin 41 of the window 9 portion of the pressing body 15 does not necessarily need to be composed of one pin, and the central portion may be removed to make it two pins.

During printing, the stencil printing original plate 31 with perforations and printing ink placed thereon is attached to the printing original plate holder 8 in the same manner as in the above embodiment, the paper to be printed 39 is stacked and placed on the base 1, and the elastic body 23 The bullet part 25 of the printing paper 39
, and press the pressing lever 5 downward. The stencil printing original plate holder 8 and the pressing body 15 descend, and the stencil printing original plate 31 comes into contact with the printing paper 39, and then,
The pressing part 22 of the pressing body 15 applies printing ink to the sheet 3.
4 to print on the printing paper 39, and then the press lever 5 is raised to remove the printed printing paper 39. This operation is repeated to print on the printing paper 39.

Instead of the elastic body 23, as shown in FIGS. 11 and 12, plastic elastic bodies 23 ₁ and 23 ₂ can be constructed of pressurized parts 24 ₁ and 24 ₂ and elastic parts 25 ₁ and 25 ₂ . Alternatively, as shown in FIG. 13, the elastic body 23 ₃ can be composed of a pressurized portion 24 ₃ made of plastic and a resilient portion 25 ₃ made of metal.

The configurations of the stencil printing original plate holder 8 and the pressing body 15 can also be made as follows. The upright portions 11 and 19 of the stencil printing original plate holder 8 and the pressing body 15 are removed to form a convex portion 1 perpendicular to the inner surface of the side piece 10 of the stencil printing original plate holder 8, as shown in FIGS. 14 and 15.
0', a perpendicular recess 17' on the outer surface of the side piece 17 of the pressing body 15, and inserting the convex part 10' into the recess 17', the stencil printing original plate holder 8 and the pressing body 15 can be slid. be integrated into.

(Effects of the Invention) As described above, the present invention enables clear printing, smooth removal of the printed paper, and the ability to print on multiple sheets of paper at once. It can be done efficiently, and after printing, the stencil printing original plate is separated almost parallel to the printing paper, so the stencil printing original plate and the printing paper do not rub against each other, and the printed area does not shift, resulting in beautiful, detailed printing. This has the effect of allowing you to print beautifully.

[Brief explanation of drawings]

FIG. 1 is a plan view of a stencil printer according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, FIG. 3 is a side view of the stencil printer, and FIG. 4- in Figure 1
FIG. 5 is a bottom view of the stencil printing original plate holder, FIGS. 6 and 7 are respectively a plan view and a side view of the stencil printing original plate, and FIG. 8 is a diagram showing another embodiment of the present invention. Top view of the stencil printer, Figures 9 and 1
Figure 0 corresponds to lines 9-9 and 10-1 in Figure 8, respectively.
11 to 13 are side views of an elastic body, and FIGS. 14 and 15 are a plan view and a side view, respectively, of a stencil printing original plate holder having a built-in pressing body. 1,43...Base, 2a...Slide mechanism (horizontal groove), 2b...Guide mechanism (vertical groove), 5...
...Press lever, 7...Slided mechanism (pin),
8, 47...Stencil printing plate holder, 15... Pressing body, 23, 23 ₁ , 23 ₂ , 23 ₃ , 50, 55...
...Elastic body, 27...Guided mechanism (pin), 31
...Stencil printing original plate, 39...Printing paper.

Claims (1)

[Claims] 1. Attach the stencil printing original plate holder holding the stencil printing original plate to a press lever, and operate the press lever to contact and separate the stencil printing original plate from the printing paper placed on the base, so that the stencil printing original plate is moved from the stencil printing original plate. In a stencil printer that prints by passing printing ink,
A vertical guide mechanism for bringing the stencil printing original plate into contact with the printing paper from directly above is provided on the base, a guided mechanism movably engaged with the guide mechanism is provided on the press lever, and the guide mechanism is provided with a guided mechanism movably engaged with the guide mechanism. a sliding mechanism for enabling horizontal movement of the pressing lever caused by the guided mechanism moving vertically relative to the base by engaging with the mechanism; and a sliding mechanism movable to the sliding mechanism. in,
and one rotatable sliding mechanism is provided on the base and the other on the press lever, and as the stencil printing original approaches the printing paper, the printing paper is directed toward the base. A stencil printer in which the stencil printing original plate holder or the pressing lever is provided with an elastic body that increases the pressing force.