JPH06408B2 - Feeding method for stencil-making plate making machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base paper feeding method for a stencil printing machine.
More specifically, the present invention relates to a base paper feeding method for a stencil-type stencil-making printing apparatus which has a plate-making means for making a stencil printing base paper and a single cylinder rotary stencil printing means, and carries out stencil making and stencil printing.

BACKGROUND OF THE INVENTION A stencil plate-making printing apparatus having a plate making means for making a stencil printing base paper and a single cylinder rotary type printing device for making stencil printing using the stencil printing base paper made by the plate making means is the applicant of the present invention. Japanese Patent Application No. 57-207216 filed by the same applicant as
Japanese Patent Laid-Open No. 59-96983 has already been proposed.

In the stencil printing machine of the type as described above, continuous stencil printing in roll form is performed so that the stencil printing and the subsequent stencil printing can be repeated without the need to manually supply the stencil printing base paper. The stencil printing base paper is used, and the stencil printing base paper is made by the plate making means and then sent by the feeding means to the cylindrical plate cylinder, and by the clamping means provided on the outer peripheral surface of the cylindrical plate cylinder. Then, the front edge of the stencil printing paper is wound around the outer peripheral surface of the cylindrical plate cylinder with its leading edge locked and cut to a predetermined length by a cutting means. The edge is located at the position cut by the cutting means, and the stencil printing paper is freely moved by the feeding device to a position where the leading edge of the stencil printing paper is engaged with the clamping means of the cylindrical plate cylinder during the next plate making and printing. Delivered in the state.

The stencil printing base paper, especially the heat-sensitive stencil printing base paper, is very thin and soft, and it is easily warped under the influence of humidity. It is difficult to convey it reliably, and the leading edge of the stencil printing base paper is not conveyed to a predetermined value position, that is, the engagement position of the clamp means on the cylindrical plate cylinder due to sagging or warping, so that conveyance failure is likely to occur. . Such a poor conveyance of the stencil printing base paper is avoided so that the stencil-type plate-making / printing apparatus performs a sequence operation of plate-making and stencil printing as a series of operations so that the sequence operation is performed smoothly and normally. There must be.

OBJECT OF THE INVENTION The main object of the present invention is to provide a stencil sheet feeding method for a stencil plate making and printing apparatus which is improved so that the stencil sheet can be reliably fed to the clamping means of the cylindrical plate cylinder. In particular, the stencil printing base paper has a cylindrical shape with a focus on the fact that the shorter the distance that the leading edge of the stencil is conveyed is, the less likely it is that a conveyance failure due to sagging or warping will occur, and the conveyance reliability will improve. An object of the present invention is to provide a base paper feeding method for a stencil type plate making and printing apparatus which is improved with respect to the relative arrangement positions of the plate cylinder, the plate making means, the feeding device and the cutting means, and the working relationship between the feeding device and the cutting means. I am trying.

According to the present invention, the above object is provided with a stencil printing means including a cylindrical plate cylinder having a clamp means for locking one end of the stencil printing base paper on the outer peripheral surface, and the stencil printing base paper. Plate making means for making a plate of the stencil printing paper, and feeding for feeding the stencil printing paper from the plate making means to the cylindrical plate cylinder provided between the cylindrical plate cylinder and the plate making means. Means, and a stencil printing base paper cutting means provided with a shearing blade that is provided between the feeding means and the cylindrical plate cylinder and cuts the stencil printing base paper by shearing. A stencil plate-making / printing-apparatus feeding process in which one piece of the stencil-making stencil cut by one cutting action of the stencil-printing stencil cutting means is wound around the cylindrical plate cylinder. As the sending method, the cutting work of the stencil printing base paper cutting means is performed. After the end of use, the one plate making step includes a step of operating the feeding device for a short time to advance the leading end of the subsequent base paper having the cutting portion to the position beyond the cutting edge of the shearing blade. It is achieved by the method of feeding a base paper of a stencil-type plate making and printing apparatus.

Action and Effect of the Invention In the stencil type plate making and printing apparatus having the structure as described above, the stencil sheet is fed tangentially toward the outer peripheral surface of the cylindrical plate cylinder by feeding the sheet as described above. In the case of feeding, the cutting means, which can be arranged at a position closer to the cylindrical plate cylinder than the feeding means from the viewpoint of required space, is arranged on the downstream side of the feeding device along the feeding direction of the stencil printing base paper, Keeping the leading edge of the stencil printing paper at a position as close to the cylindrical plate cylinder as possible in preparation for the next plate making process is inevitably sheared by being cut by the shearing type cutting device. The tip of the subsequent stencil printing paper located upstream of the blade edge of the blade is warped and deformed due to the influence of humidity over time, and the progress of the tip during the next plate making process is caused by the shear blade of the cutting device. Be sure to avoid problems that might be Can be given.

Description of Embodiments Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 show one embodiment of a stencil-type plate-making / printing apparatus which is a target of the raw paper feeding method according to the present invention.
The illustrated stencil-type plate-making / printing apparatus includes a cylindrical plate cylinder 2, a press roller 3, a sheet feeding device 4, a sheet discharging device 5, a stencil printing paper container 6, a plate making device 7, and a plate discharging device 8 in one cabinet 1.
And have.

The cylindrical plate cylinder 2 is composed of a cylindrical body having an ink-permeable structure, is supplied with printing ink from an ink supply device (not shown) provided in the cylinder, and is itself driven by a drive device (not shown). It is designed to be driven to rotate in the counterclockwise direction around the central axis of the figure. Clamping means 9 for selectively locking one end of the stencil printing base paper S is provided on the outer peripheral surface of the cylindrical plate cylinder 2. The clamp means 9 is fixed to the outer peripheral surface of the cylindrical plate cylinder 2 and extends in a strip-shaped permanent magnet plate 10 along one bus bar thereof, and extends in the cylindrical plate cylinder 2 in the axial direction thereof. A movable clamp piece 12 made of metal, which is rotatably mounted by means of a shaft 11, which is a cylinder when the cylindrical plate cylinder 2 is in the initial rotational position as shown. A gear 13 provided at one end of the shaft 11 at the uppermost position of the plate cylinder 2 meshes with a drive gear 15 movably provided with respect to the cabinet 1 by a lever 14 so that the drive gear 15 As it is rotationally driven, it is rotationally driven between an unclamp position separated from the permanent magnet plate 10 and a clamp position where the permanent magnet plate 10 is magnetically attracted to and overlaps with the permanent magnet plate 10 as shown in the drawing. It has become. The permanent magnet plate 10 is in a horizontal posture when the cylindrical plate cylinder 2 is in the initial rotation position, and its upper surface is a horizontal plane.

The plate making device 7 is provided between the stencil printing paper storage part 6 and the cylindrical plate cylinder 2, and the plate making device comprises an upper opening type box 16 and the box as shown in FIG. Exposure stage having a rectangular glass light transmission plate 17 attached to the upper part of the box and forming the upper surface of the box, and a light source device 18 for irradiating the light beam to the light transmission plate 17 and a reflecting mirror 19 provided in the box 16. 20 and exposure stage 2
0 which is provided above 0 and has a cushion member 21 made of sponge attached to the facing surface and facing the light transmitting plate 17.
2 and. While the pressing plate 22 is fixed to the cabinet 1, the exposure stage 20 is provided so as to be movable in the vertical direction in the figure, and as shown in FIG.
The light transmitting plate 17 is separated from the cushion member 21 of the pressing plate 22 by the drive device 44 in the open position (down position).
And the light transmission plate 17 is driven between the pressing device (ascended position) pressed against the cushion member 21.

A feeding device 25 having a pair of upper and lower rollers 23 and 24 is provided between the cylindrical plate cylinder and the exposure stage 20 of the plate making apparatus 7. The rollers 23 and 24 are provided parallel to the axis of the cylindrical plate cylinder 2, respectively, and engage with each other at the same height position as the upper surface of the permanent magnet plate 10 of the cylindrical plate cylinder in the initial rotation position. By rotating 23 in the counterclockwise direction in the figure, the stencil printing base paper S is fed from the plate making apparatus 7 side toward the cylindrical plate cylinder 2.

A stencil sheet cutting device 26 for stencil printing is provided between the feeding device 25 and the cylindrical plate cylinder 2. The stencil sheet cutting device 26 has a fixed lower blade 27 and a movable upper blade 28 provided in parallel to the axis of the cylindrical plate cylinder 2, and the fixed lower blade 27 is a holding member 29 fixed to the cabinet 1. The upper surface 27b of the cylindrical plate cylinder 2 in the initial rotation position substantially forms a horizontal plane at the same height position on the upper surface of the permanent magnet plate 10 of the cylindrical plate cylinder 2 and is fed by the feeding device 25. It acts as a guide surface for the stencil printing base paper S sent toward the sheet 2, and its leading edge is the cutting edge 27a. As shown in FIG. 3, the movable upper blade 28 has support pins 30 at both ends thereof, and the fixed lower blade 27 is supported by the support pins.
It is provided so as to be movable in the vertical direction by engaging with guide holes 32 of the support plate 31 which are respectively provided upright at both ends thereof. The movable upper blade 28 has a cutting edge 28a at the lower end edge, and the cutting edge cooperates with the cutting edge 27a of the fixed lower blade 27 so that the cutting of the stencil sheet S starts from one side thereof. It is inclined vertically with respect to the cutting edge 27a. The movable upper blade 28 has a connecting member 33 having a piece portion 33a facing the upper surface 28b of the movable upper blade.
An eccentric cam 34 is fixed between the upper surface 28b of the movable upper blade 28 and the piece 33a by a shaft 35 rotatably supported by a support plate 31. The movable upper blade 28 is lowered by the rotation of the eccentric cam 34 against the spring force of the return spring 36, and the cutting edge 28a engages with the cutting edge 27a of the fixed lower blade 27 and the cutting position (see FIG. 5). Blade 28a
Is driven between the fixed lower blade 27 and a raised position (see FIG. 4) separated upward from the cutting edge 27a.

An upper guide plate 42 of the stencil sheet S is attached to an upper portion of the fixed lower blade 27.

The stencil printing paper storage unit 6 rotatably supports a stencil printing paper wound around a hollow roll core, that is, a stencil printing paper roll 37 by a support shaft 38.

The stencil printing base paper S of the stencil printing base paper roll 37 reaches the feeding device 25 via the light transmitting plate 17 of the plate making device 7 and the guide roller 43, and further passes between the rollers 23 and 24 of the feeding device. It passes through and reaches the fixed lower blade 27 of the stencil sheet cutting device 26, and the leading edge thereof is the cutting edge 27a of the fixed lower blade 27.
It is initially set so as to project a little further and be positioned below the movable upper blade 28. By initializing the stencil printing base paper S in this way, even if the leading end of the stencil printing base paper S is warped up due to the influence of humidity, the warped upper blade 28
The stencil sheet S is prevented from colliding with the vertical surface of the movable upper blade 28, and the stencil sheet feeding failure is prevented.

At the time of plate making, the original sheet placed on the original table 40 with the original surface facing downward is the light transmitting plate 17 of the plate making device 7.
When the preparation for plate making is completed, the roller 23 of the feeding device 25 is driven to rotate counterclockwise in the figure, and the stencil printing base paper is transferred to the cylindrical plate cylinder 2. Delivered to. When the leading edge of the stencil sheet reaches the permanent magnet plate 10, the drive of the roller 23 in the counterclockwise direction is stopped, and then the driving gear 15 causes the clamp piece 12 to move as shown in the drawing. It rotates clockwise from the unclamp position in the figure, and this is magnetically attracted to the permanent magnet 10 with the leading edge of the stencil printing paper sandwiched between them, and comes to be in the so-called clamp position. As a result, the leading edge of the stencil sheet S is locked to the plate cylinder 2.

When the stencil sheet is clamped, the drive unit 44
The exposure stage 16 rises, and the stencil sheet S
And the cushion member 2 of the partial light transmitting plate 17 and the pressing plate 22 between the light transmitting plate 17 and the pressing plate 22 of the original sheet.
The light source device 18 emits light in this pressure-bonded state by being sandwiched between 1 and 1, and a light ray is emitted from this to the polymer of the stencil printing base paper and the original sheet through the light transmission plate 17. . By this light irradiation, the stencil printing base paper is thermally perforated to make a plate. When this one exposure is completed, the light source box 20 is lowered by the driving device 44,
The light transmitting plate 17 is separated from the pressing plate 22, and the pressure contact between the stencil printing base paper S and the original sheet is released. Next, the cylindrical plate cylinder 2 is rotated counterclockwise in the figure, and the stencil printing base paper S is pulled by the rotation of the cylindrical plate cylinder, and at the same time, it is wound around the outer peripheral surface of the cylindrical plate cylinder 2. The original sheet on the stencil printing base paper S is separated from the stencil printing base paper S at the corners 20a of the light source box 20 and is sent to the original discharge passage 41 as the stencil printing base paper S moves.

When the exposure as described above is repeatedly performed and the plate making corresponding to one original sheet is completed, the cylinder is made to a length such that the stencil sheet S is wound around the entire outer peripheral surface of the cylindrical plate cylinder 2. The block cylinder 2 rotates counterclockwise in the figure.
In this way, when the plate making of the stencil printing plate 2 and the mounting of the stencil printing plate 2 on the cylindrical plate cylinder 2, so-called plate mounting, are completed, the eccentric cam 34 is rotationally driven by the shaft 35, so that the movable upper blade 28 is moved. Descending as shown in and cutting edge 28 of this
The stencil sheet S is cut by the shearing action of a and the cutting blade 27a of the fixed lower blade 27. When the cutting of the stencil printing base paper S is completed, the movable upper blade 28 is raised again by the rotation of the eccentric cam 35, and is positioned at the raised position as shown in FIG. At this time, the leading edge of the stencil printing base paper S which is not wound around the cylindrical plate cylinder 2 and is used for the next printing is in a position aligned with the cutting edge 27a of the fixed lower blade 27. If left in this state, the leading edge of the stencil printing base paper warps up due to the influence of humidity, and at the time of the next feeding, the leading edge hits the vertical surface of the upper blade 28 to cause feeding failure. Therefore, the stencil sheet is slightly fed by the feeding device 25 so that its leading edge is located below the movable upper blade 28 as shown in FIG.

FIG. 6 shows another embodiment of the stencil-type plate-making / printing apparatus which is a target of the base paper feeding method according to the present invention. In FIG. 6, portions corresponding to those in FIG. 2 are designated by the same reference numerals as those in FIG. In such an embodiment, the movable upper blade 28 is supported by the rotating shaft 39, and is rotated around the central axis of the rotating shaft to cooperate with the fixed lower blade 27 to cut the stencil printing base paper. It is becoming like this.

In this embodiment as well, the same operational effects as those of the above-described embodiment can be obtained by controlling the operation in the same manner as the above-mentioned embodiment.

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited to these, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a stencil-type plate-making / printing apparatus which is a target of a base paper feeding method according to the present invention, and FIG. 2 shows the stencil-type plate-making / printing apparatus shown in FIG. And FIG. 3 is a perspective view showing one embodiment of the stencil sheet cutting device used in the present invention, and FIGS. 4 and 5 are stencil printing patterns shown in FIG. FIG. 6 is a sectional view showing an operating state of the stencil sheet cutting device, and FIG. 6 is a vertical sectional view showing the essential part of another embodiment of the stencil plate making and printing apparatus which is a target of the stencil sheet feeding method according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Cabinet, 2 ... Cylindrical plate cylinder, 3 ... Press roller, 4 ... Paper feeding device, 5 ... Paper discharging device, 6 ... Stencil printing base paper storage part, 7 ... Plate making device, 8 ... Plate discharging device, 9 ... Clamp Device, 10 ... Permanent magnet plate, 11 ... Shaft, 12 ... Clamp piece,
13 ... Gear, 14 ... Lever, 15 ... Drive gear, 16 ... Light source box, 17 ... Glass light transmitting plate, 18 ... Light source device, 19 ... Reflecting mirror, 20 ... Exposure stage, 21 ... Cushion member, 22 ... Pressing plate , 23, 24 ... Roller, 25 ...
Feeding device, 26 ... Raw paper cutting device for stencil printing, 27 ... Fixed lower blade, 28 ... Movable lower blade, 29 ... Support member, 30 ... Support shaft, 31 ... Support plate, 32 ... Guide hole, 33 ... Connecting member, Three
4 ... Eccentric cam, 35 ... Shaft, 36 ... Return spring, 37 ... Stencil printing roll, 38 ... Support shaft, 39 ... Rotation shaft, 40
... manuscript placing table, 41 ... manuscript discharge passage, 42 ... upper guide plate, 43 ... guide roller, 44 ... drive device

Claims (1)

[Claims] 1. A stencil printing means including a cylindrical plate cylinder provided with a clamp means for locking one end of the stencil printing base paper on an outer peripheral surface, and the stencil printing base paper is supplied to perform plate making of the stencil printing base paper. Plate making means, a feeding means provided between the cylindrical plate cylinder and the plate making means, for feeding the stencil printing base paper from the plate making means toward the cylindrical plate cylinder, the feeding means and the One of the stencil printing base paper cutting means having a stencil printing base paper cutting means provided with a shearing blade for cutting the stencil printing base paper by shearing provided between the stencil printing base paper and the cylindrical plate cylinder. In the stencil sheet feeding method of the stencil plate making and printing apparatus, which is a single stencil making step, winding one piece of the stencil sheet for stencil printing cut by the cutting action once, After the cutting operation of the base paper cutting means is completed, The one-time plate making process includes a step of activating and advancing the leading end of the subsequent base paper having the cutting portion to a position beyond the cutting edge of the shearing blade in the one-time plate making process. Method.