JPH0242462Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to base paper for mimeograph printing, and more specifically, to prevent errors such as erroneously mounting the base paper upside down when loading the base paper into a printing machine. The present invention also relates to such a seed base paper that can be reliably attached by an automatic attaching device.

[Prior Art] As a conventional base paper for mimeograph printing, one having a shape as shown in a front view seen from the mount side in FIG. 1 is generally widely used. In the figure, mount 1
A plurality of fitting holes 11 are provided above 0 for attaching the base paper to the base paper attachment pins on the printing machine side.
are drilled at equal intervals. In the figure, there is a stencil paper 12 on the back side of the mount 10, and the upper end of the stencil paper 12 is attached to the mount 10 at a portion 13. There is a cut-off line 14 slightly below the pasting part 13, and the part of the mount above this line is the stencil paper 1.
This is the so-called selvedge part of No. 2. In order to install such a base paper into a printing machine, the applicant first applied the
As disclosed in No. 50863, first, as shown in FIG.
1 into the mounting pin 15 on the printing machine side. Next, the mount paper 10 is cut along the perforation line 14 and peeled off by about 8 cm from there, and the stencil paper 12 is peeled off by rotating the drum 16 on the printing machine side using the printer cover (not shown).
is wound onto the drum 16 of the printing press.

[Problems to be solved by the invention] In the conventional mimeograph printing base paper described above, a plurality of fitting holes 11 are drilled at equal intervals, so that an operator who is inexperienced in handling the machine can easily insert the base paper by mistake. The drawback was that I often made the mistake of attaching it upside down. Furthermore, if the diameter of the fitting hole 11 is made the same as the diameter of the base paper attachment pin 15 on the printing machine side, it will be difficult to fit the base paper when attaching it, so the diameter of the fit hole 11 is usually made a little larger, but it is left as is. This makes the edge paper part easily come off during printing. Therefore, it is customary to provide a selvage paper presser plate on the printing press side, but the existence of this selvage paper presser plate has the disadvantage that when the base paper is attached using an automatic loading device, the apparatus becomes complicated.

The base paper mounting pin is mushroom-shaped as shown in Figure 5, and the base paper fitting hole is a large diameter hole with a radius equal to or slightly larger than the radius of the pin head, and a hole with a radius approximately equal to the radius of the pin base. This type of mimeograph printing paper is also known, which has a shape in which small diameter holes are arranged in series, and the distance between the points where the outer circumferences of these holes intersect is smaller than the diameter of the pin base and the diameter of the small diameter holes. (Japanese Utility Model Application Publication No. 58-128066) However, the edge paper part that forms the fitting hole is generally made of stiff cardboard, and after passing the pin through the large diameter hole, the pin is moved to the small diameter hole side. When the pin is moved, the base of the pin comes into contact with the narrow part between the two holes and forces it open, so a certain amount of tensile force is required. In order to apply this method, there was a problem because it required a device that applied a uniform tensile force to the base paper.

The present invention was developed based on this viewpoint, and it prevents errors such as accidentally attaching the base paper upside down, makes attachment by an automatic loading device simple and reliable, and provides a base paper presser on the printing machine side. The purpose of the present invention is to provide a mimeograph printing base paper that does not require a board.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a notch for positioning is provided on the front edge of the mount of the mimeograph base paper for abutment against a corresponding contact member on the printing machine side. ,
Moreover, the notch was formed so that the front edge of the mount was asymmetrical with respect to its center line. In addition, the hole that fits into the base paper mounting pin on the printing machine side is made so that the radius of curvature on the leading edge side is equal to the radius of curvature of the base of the pin, and the radius of curvature on the trailing edge side is larger than this, and a hole that can pass through the top of the pin is formed. The pin has a circular shape, and the width of the movement path of the pin from the rear edge side to the front edge side is made equal to or larger than the diameter of the base of the pin. Here, the movement path means the path along which the maximum width portion of the base of the base paper attachment pin moves.

[Function] With the above-mentioned configuration, in the mimeograph printing base paper according to the present invention, the positioning notch which makes the front edge of the mount asymmetrical cooperates with the abutting member on the printing machine side, so that the base paper is accidentally This prevents incorrect work such as installing the base paper upside down, and after the base paper mounting pin on the printing machine side is inserted into the trailing edge side, its base smoothly moves to the leading edge side of the fitting hole with the same radius of curvature.
By firmly engaging the base of the pin on this leading edge side, the selvedge portion is prevented from coming off the pin during printing.

[Embodiment] FIG. 3 is a front view of an embodiment of the mimeograph base paper according to the present invention, viewed from the mount side, and the same parts as in the above-mentioned conventional example are given the same reference numerals. In the figure, there is a stencil paper (not shown) on the back side of the mount 10, and it is pasted to the mount 10 with an adhesive part 13, and the mount 10 has a perforation line 14, unlike the conventional method. Same as original paper. In the base paper of the present invention in this embodiment, a notch 17 for positioning is provided at an asymmetric position (l ₁ > l ₂ ) from the center on the leading edge of the mount, and is also designed to fit into a base paper mounting pin on the printing machine side. Four non-circular fitting holes 18 are bored as the holes. FIG. 4A is an enlarged explanatory view of the fitting hole 18. As is clear from the figure, the front edge side of the fitting hole 18 is connected to the base paper mounting pin 19 (preferably the pin 19) on the printing machine side illustrated in FIG. The radius of the base of the pin (which has a bulging shape as shown in the figure, but may also have a regular cylindrical shape like the pin 15 shown in FIG. ₂ )
, and the rear edge side has a radius of curvature that is larger than this and can pass through the bulged upper part of the pin 19.
has r ₂ . Also, the leading edge circle formed with radius r ₁ and the trailing edge circle formed with radius r ₂ join at positions X and Y, and the straight line connecting X and Y is the radius r ₁ of the leading edge side circle. It has a shape that passes through the center of. Therefore, the moving path of the pin 19 is from the center of radius r ₂ to the center of radius r ₁ , and its narrowest width is between X and Y, which is equal to the diameter of the base of the pin 19 .

For the mimeograph base paper with the above configuration, when the base paper is correctly inserted into the automatic loading device, the notch 1
7 abuts against an abutment member 20 fixed at a corresponding position on the printing press side, and the front edge of the mount is inserted to the position shown by the imaginary line in FIG. If the operator accidentally inserts the base paper upside down, the positional relationship between the notch 17 and the abutment member 20 will not match, and the mount will be blocked from entering by the front edge of the abutment member 20 and will not reach the imaginary line position. will no longer be inserted. The automatic loading device of a printing machine is designed to perform the next loading operation when the original paper is correctly inserted to the imaginary line position.Therefore, if the original paper is inserted upside down by mistake, the device will not perform the next operation. Because the operator does not move on to the next step, the worker can immediately learn of his or her mistake.

When the automatic loading device subsequently enters the base paper mounting operation, the portion having a larger radius of curvature on the trailing edge side of the fitting hole 18 passes through the bulged upper part of the base paper mounting pin 19 on the printing press side, and the base of the base paper mounting pin 19 passes through. will be installed on the Next, when the drum 16 of the printing press starts to rotate, the base paper mounting pin 19 smoothly moves to the front edge side of the fitting hole 18, and the base paper mounting pin 19 moves smoothly to the front edge side of the fitting hole 18, which has a radius of curvature equal to the radius of the base of the pin 19. Engage with the edge. As the drum 16 rotates, the base paper is wrapped around the surface of the drum. The base paper engaged with the base paper attachment pin 19 in this way has a radius of curvature on the front edge side of the fitting hole 18 that is smaller than the radius of curvature on the upper part of the attachment pin 19.
The selvedge paper part never comes off. Furthermore, even if the mounting pin 19 has a regular cylindrical shape,
Since the front edge side of the fitting hole 18 has the same radius of curvature as the base of the mounting pin 19, it firmly engages the base of the pin 19 and prevents the edge paper portion from coming off from the pin 19 during printing. .

The notch 17 and the fitting hole 18 in the base paper according to the present invention are not limited to the shape and configuration shown in FIG. 3, but can be modified in various ways.

Fig. 4B shows a fitting hole 18a of another shape, in which the front edge side has a radius of curvature equal to the radius _r1 of the mounting pin 19, but the rear edge side has a circular arc portion with a larger radius of curvature. It has a long hole shape. Also, the circle on the leading edge side formed with radius r ₁ and the ellipse on the trailing edge side join at positions X' and Y', and the center of radius r ₁ is
It is located slightly on the trailing edge side of the straight line connecting X' and Y'. Therefore, the movement path of pin 19 is to a position slightly on the rear edge side of the position connecting X' and Y',
Its narrowest width diameter is slightly larger than the diameter of the base of the pin 19.

6A to 6C show modified embodiments of the notch 17. FIG. In FIGS. 6A and 6B, according to the shape of the contact member 20 on the printing machine side,
A cutout 17a or 17b having a shape different from that of the first embodiment is provided at an asymmetrical position from the center of the mount. In FIG. 6C, notches 17c of different shapes are provided on both sides of the front edge of the mount, and in this case, the abutment members 20 on the printing press side are not of the same size on the left and right sides, but have different lengths in accordance with the left and right notches. The point is that the notch is to prevent you from confusing the front and back sides of the mount.
It is sufficient that the front edge of the mount is formed asymmetrically with respect to the center line. Further, the number of notches is not limited to two as shown in the figure, and the number may be further increased depending on the number of abutting members.

[Effects of the invention] As described above, the mimeograph printing base paper of the invention exhibits the following excellent effects.

(1) A notch is provided on the front edge of the mount so that the front edge has an asymmetrical shape with respect to its center line, and this is positioned by abutting against the abutment member on the printing press side. There is no possibility that the operator will accidentally attach the base paper to the printing machine upside down.

(2) Since the radius of curvature on the front edge side of the fitting hole is made equal to the radius of the base of the base paper attachment pin, the accident that the edge paper part of the base paper comes off from the pin during printing work can be prevented. This eliminates the need for a selvedge paper presser plate, and therefore facilitates the attachment of the base paper by an automatic attachment device.

(3) The radius of curvature on the trailing edge side of the fitting hole is larger than that on the leading edge side and allows it to pass over the top of the base paper attachment pin, and the width diameter of the pin movement path from the trailing edge side to the leading edge side is set to the base of the pin. The diameter of the base paper mounting pin is equal to or larger than this, so when mounting the base paper using the automatic loading device, even if there is a slight mechanical error in the position of the base paper mounting pin, it can be securely attached, and the front edge side of the pin base It is effective for automatically loading the base paper.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional mimeograph base paper seen from the mount side, Figure 2 is an explanatory diagram of fitting the conventional base paper to the base paper mounting pin of a printing machine, and Figure 3 is a front view of the base paper for mimeograph printing. FIG. 4A is an enlarged view of the fitting hole in the embodiment shown in FIG. 3, and FIG. 4B shows the shape of the fitting hole in another embodiment. Figures 5 and 5 are diagrams showing examples of base paper attachment pins on the printing machine side, and Figures 6A and 6C are diagrams showing modified examples of the notches. 10...Paper, 12...Stencil paper, 13
... pasting part, 14 ... cutting line, 17, 17a,
17b, 17c...notch, 18, 18a...fitting hole.

Claims (1)

[Claims for Utility Model Registration] Consisting of a mount 10 and a stencil paper 12 pasted near the front edge of the mount at a position away from the front edge, between the front edge of the mount and the stencil paper pasting position. A base paper for mimeograph printing that has a plurality of holes that fit into base paper mounting pins on the printing machine side, and a positioning notch on the front edge of the mount 10 that abuts against a corresponding abutment member 20 on the printing machine side. 17,
Moreover, the notch 17 is formed so that the front edge of the mount 10 has an asymmetric shape with respect to its center line, and the hole 1 that fits into the base paper mounting pin 19 on the printing machine side
8, the radius of curvature on the leading edge side is equal to the radius of curvature of the base of the pin 19, and the rear edge side has a larger diameter than this and has a non-circular shape that can pass through the upper part of the pin 19, and from the rear edge side to the leading edge side. A mimeograph printing base paper characterized in that the width diameter of the movement path of the pin 19 is equal to or larger than the diameter of the base of the pin 19.