JPH07137420A - Stencil printing press with movable paper-discharge part - Google Patents

Abstract

PURPOSE:To easily remove jamming of printing paper from the external by a method wherein one rolling body of a rolling feed means for feeding printing paper between two rolling bodies is provided on a paper discharge mount that can move between an operation position and a non-operation position. CONSTITUTION:In a stecil printing press, a paper discharge mount 60 moving between an operation position and a non-operation position along a pair of rails 58 supported to a frame 56 of the stencil printing press is provided in a paper discharge part 54. The paper discharge mount 60 as a whole contains a frame 64 a part of' which forms a paper discharge tray 62. The frame 64 is provided with pinch rollers 66 pressing the both-side edges of printing paper on an impression roller 14 when the printing paper is fed from on a claming area 15 with the leading end is caught on the impression roller 14 by a clamper 51 and printing roller fling rollers 72 imparting a flinging force to printing paper in a paper discharge direction. The printing paper fling rollers 72 discharge the printing paper in cooperation with drive-side printing paper fling rollers 10 provided in the paper discharge part 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of stencil printing, and more particularly, to an improvement in the structure of the paper discharge section of a stencil printing machine.

[0002]

2. Description of the Related Art A printing drum on which a stencil sheet is wound, and a backing roller arranged to face the printing drum,
In a stencil printing machine that performs stencil printing by applying ink from the perforated stencil paper wound around the printing drum to the printing paper sent through the sandwiched region between the printing drum and the backing roller, On the print sheet exit side of the sandwiched area, there is provided a slide roll feeding means for sandwiching the print sheet, which has left the sandwiched area, between the two rolling elements and sending it in the sheet discharge direction. In a conventional so-called rotary type stencil printing machine equipped with a printing drum, the printing paper printed in the sandwiching area between the printing drum and the back-pressing roller has a sandwiching area due to the viscosity of the ink. After leaving
For a while, it moves while adhering to the cylindrical surface of the printing drum (more correctly, the surface of the stencil sheet wound around it), and then it is separated from the surface of the printing drum by the peeling claw and goes to the paper ejection tray. ing. In such a conventional stencil printing machine, at the printing paper exit side of the sandwiched area, the contact portion between the printing drum and the back pressing roller (more accurately, the outer peripheral surface of the printing drum and the outer peripheral surface of the back pressing roller. Is close to the stencil sheet and the printing paper, and the wedge-shaped space left between the printing drum and the backing roller is still narrow. There is no feeding means, and the pinched rolling feeding means for feeding the printing paper stripped from the printing drum to the paper ejection tray is provided at a great distance from the wedge-shaped space.

[0003]

In stencil printing, when stencil printing is carried out by pressing the stencil base paper perforated and having an ink layer on the back surface pressed onto the surface to be printed, Pressing force is applied to the ink layer by an ink pressing means such as an inking roller to push the ink toward the surface to be printed through the perforated portion of the stencil sheet. After the ink has been extruded by the means, if the surface to be printed is separated from the surface of the stencil sheet while keeping the relative position of the ink pressing means to the stencil sheet unchanged, the ink pressing means prevents the incompressible ink layer from moving. The surface to be printed is separated from the surface of the stencil sheet in the closed state, and when the surface to be printed is separated from the surface of the stencil sheet, the ink viscously follows the surface to be printed. The elephant is suppressed, the ink layer of the printed image formed on the printed surface is thin and uniform, the printed image is clear, and there is no unnecessary rise of the ink layer. It is described in the specification and drawings of Japanese Patent Application No. 4-163590, which was filed by the same applicant as the applicant of the present invention, that a high quality stencil printed matter without show-through can be obtained even immediately after that.

When the stencil printing method is carried out in a rotary type stencil printing machine using a printing drum and a back-pressing roller, the printing paper leaves the pinched area as proposed in the above patent application. It is required to proceed in a state in which it is in close contact with the surface of the back-pressing roller for a while, so that it is formed as close as possible to the contact part between the printing drum and the back-pressing roller on the exit side of the sandwiched area and between them. A pinch roller that presses both side edges of the printing paper against the backing roller was conceived in a portion where the wedge-shaped space that was formed is still narrow, and a new wedge-shaped space on the exit side of the sandwiched area was newly added. It has become possible to provide a gripping roll feeding means for ejecting printing paper, which uses the back-pressing roller as one rolling element.

Although the proximity of the outside of the gripping area is poor in the proximity from the outside, a gripping rolling feeding means is provided near the exit side of the gripping area, and when a print sheet is caught in the gripping area, printing is performed. Since the sheet is firmly sandwiched between the two rolling elements, there is a problem that it is extremely difficult to take out the caught printing sheet.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stencil printing machine which can overcome the new problems caused by the new development of the stencil printing method or the stencil printing means and overcome the problems.

[0007]

According to the present invention, the above-mentioned problems include a printing drum on which a stencil sheet is wound, and a backing roller arranged to face the printing drum. Performing stencil printing by applying ink from the perforated stencil sheet wound around the printing drum to the printing paper sent through the sandwiching region between the printing drum and the backing roller, A stencil printing machine having a pinch rolling feed means for feeding the print sheet, which has exited the pinched area on the printing paper exit side, between two rolling elements in the paper ejection direction, and the pinch rolling feed means The stencil printing machine is characterized in that one of the rolling elements is provided on a paper discharge table movable between an operating position and a non-operating position pulled out from the operating position.

In the stencil printing machine having the above-mentioned structure, the paper discharge tray is locked at the operating position by the locking means, and the locking means moves the paper discharge tray from the operating position to the non-operating position. It is preferable that the locking state is released by being interlocked with a handle for pulling out the sheet discharge tray to the handle and a force applied to the handle in a direction of pulling out the sheet discharge tray from the operating position to the non-operating position.

The movement of the output tray may be guided by rails, or by parallelogram links, or by pivots.

[0010]

As described above, the printing paper exiting the gripping area between the printing drum and the back-pressing roller is located between the two rolling elements. One of the rolling elements of the gripping roll feeding means for feeding in the paper ejection direction is provided on the paper ejection tray movable between the operating position and the non-operating position pulled out from the operating position, so that the paper ejection tray is When moved to the non-operating position, one rolling element of the pinching rolling feed means is separated from the other rolling element, and the printing paper caught between the two is released without difficulty, and at the same time, in the pinched area. Since a large space is opened on the printing paper exit side, the jammed printing paper can be easily removed from the outside.

Further, in such a stencil printing machine, the paper discharge tray is locked at its operating position by the locking means, and the locking means is interlocked with the handle for pulling the paper discharge tray from the operating position to the non-operating position. However, if the locking means is unlocked by the force applied to the handle in the direction of pulling out the paper ejection tray from the operating position to the non-operating position, the user of the stencil printing machine If the user pulls the paper ejection tray from the operating position to the non-operating position with his or her hand, the paper ejection tray is automatically released from the locking at the operating position and easily pulled out to the non-operating position. Of course, in this case, if the paper ejection tray is pushed back from the non-operating position to the operating position, the locking means can automatically lock the paper ejection tray in the operating position.

The paper discharge tray has a frame structure that can be drawn out even in the conventional structure, and therefore, the present invention utilizes such a conventional frame structure that can be drawn out. This is efficiently achieved by mounting one of the two rolling elements that constitute the pinch roller and other rolling contact feeding means. The movement of the output tray may be guided by rails, parallelogram links or pivots.

[0013]

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

FIG. 1 attached herewith is a schematic block diagram showing one embodiment of a stencil printing machine according to the present invention, particularly focusing on the construction of the above-mentioned paper discharge section which is a main part of the present invention. is there.
The illustrated stencil printing machine has a configuration as a stencil printing machine that also performs plate making. In FIG. 1, reference numeral 10 denotes a rotary printing drum, the main part of the cylindrical surface of which is composed of a thin and flexible porous sheet material, around which the stencil sheet made by plate making is wrapped, The ink is supplied from the inner peripheral surface by the inking roller 12 provided in contact with the inner peripheral surface. The flexible cylindrical portion of the printing drum 10 is bulged outward in the radial direction at a portion in contact with the inking roller 12 by selectively biasing the inking roller 12 downward in the drawing, and the bulging portion Is pressed along the generatrix between the cylindrical surface of the back-pressing roller 14 and the rear surface of the back-pressing roller 14.
Is formed, and a print image is formed on the printing paper pressed between the two in this sandwiched area according to the perforated portion of the stencil sheet. A stencil printing machine having such a configuration is disclosed in Japanese Patent Laid-Open No.
It is disclosed in Japanese Patent Publication No. 204781. Printing drum 1
At 0, a cross bar 16 for mounting the stencil sheet starting end extending in the generatrix direction of the cylindrical body is provided, and a clamp 18 for selectively holding the stencil sheet starting end is provided at this portion.

Reference numeral 20 denotes a plate making section for making a stencil sheet, which is a belt-shaped stencil sheet 24 which is unwound from a roll 22 which is a supply source of the stencil sheet and sent through several roll groups.
It includes a punching means 26 for punching according to an image by a large number of fine thermal heads arranged in a line, and a cutter 28 for cutting out each stencil made from a band-shaped stencil sheet.

A plate making unit 20 reads an image from a document.
An original reading unit for sending an image signal to the original, which has a light source 32 and a photodiode 34 and reciprocates along a rail 36 to reciprocate while scanning the image surface of the original placed on a glass plate 38. A read head 40 is included.

Reference numeral 42 denotes a printing paper supply section, which is a paper feed table 44 for holding a stack of printing paper sheets, and a printing paper take-out roller for taking out printing paper from above the printing paper stack body placed on the paper feeding table. 46, a printing paper separating roller 48 for separating the printing paper taken out from this, toward the gripping area 15 between the printing drum 10 and the back pressing roller 14 in synchronization with the rotation of the printing drum 10 and the back pressing roller 14. A timing roller 50 and the like for feeding the printing paper are included. The leading edge of the printing paper sent by the timing roller 50 is temporarily captured on the back-pressing roller 14 by the clamp 51 provided on the back-pressing roller 14.

Reference numeral 52 denotes a plate discharge device for removing a used stencil sheet from the printing drum 10 and carrying out a plate discharge process. The details are shown in Japanese Patent Application No. 5-5, filed concurrently with the applicant of the present application. .

Reference numeral 54 is a paper discharge unit according to the main part of the present invention.
The paper discharge unit 54 includes a pair of rails 58 supported by a frame 56 of the stencil printing machine, along with which rails an operating position shown by solid lines and non-shown by phantom lines in the drawing. It is provided with a paper output tray 60 that moves between operating positions. The paper discharge tray 60 includes a frame body 64, which is a part of the paper discharge tray 62, and is rigid as a whole. The tip of the frame body 64 is captured by the clamp 51 on the backing roller 14. In this state, both side edges of the printing paper that comes out of the sandwiched region 15 are pressed against the back-pressing roller 14, and together with the back-pressing roller, a pinch roller 66 that constitutes one picking roll feeding means and the printing paper is ejected. The other of the printing paper skipping rollers 70 and 72, which gives the flying force in the paper direction, is mounted on the drive side roller 72 of the pinching rolling feed means.
It is configured to move integrally along the extending direction of the rail 58 between 0 and the operating position.
The leading edge of the printing paper that is printed in the sandwiched region 15 and comes out is fixed on the back pressing roller by a clamp 51 provided on the back pressing roller 14 until the leading edge passes through the pinch roller 66. The end of the printing paper is pinch roller 6
When the sheet passes through 6, the clamp 51 releases the leading edge of the printing sheet, and thereafter the leading edge is captured by the peeling claw 68 and fed between the printing sheet skipping rollers 70 and 72.

The frame 64 has a handle 80 attached to it for pivotal movement about a pivot 78. The handle 80 is formed in a hook shape whose right end in the drawing engages with a fingertip and is easily pulled forward, and in the drawing, the left end is formed in a check claw shape. In the check groove 82, when the paper ejection tray 60 is in its operating position shown by the solid line in the figure,
A pin 84 fixed to the side of the frame 56 of the stencil printer engages, thereby locking the paper ejection tray 60 in its operating position. The handle 80 has a spring (not shown),
The handle 80 is biased in the clockwise direction in the figure around the pivot 78, and when the hook-shaped part at the right end thereof is pulled to the right in the figure, the handle 80 resists the biasing force of the spring and the handle 80 of the pivot 78 moves. If the handle 82 is rotated counterclockwise around the drawing, the non-return groove 82 is disengaged from the pin 84, the output tray 60 is released from the locked position, and the handle is pulled forward as it is. Thus, the paper discharge tray 60 is pulled out from its operating position shown by the solid line in the figure to its non-operating position shown by the virtual line in the figure. When the discharge tray pulled out to the non-operating position is pushed to the left in the figure with the handle 80, the pin 84 starts to engage with the slope 86 at the left end of the handle immediately before it reaches the operating position. By the way, the handle 80 is rotated around the pivot 78 in the counterclockwise direction in the drawing, and when the paper ejection tray 60 has just reached the operating position, the pin 84 is fitted into the check groove 82 to eject the paper. The platform 60 is locked in a predetermined operating position.

A paper output tray 60 shown in phantom in the drawing
As can be seen from the non-operating position of the
When is retracted to the non-operating position, a large space is opened at the printing paper exit side of the sandwiched area 15, and the space between the back pressing roller 14 and the pinch roller 66 or the printing paper skipping rollers 70 and 72 is opened at this portion. When the printing paper that has been caught in the gap remains, it can be easily removed.

FIG. 2 is a schematic view similar to that of FIG. 1 showing another embodiment different from the embodiment shown in FIG. 1 in the structure for guiding the discharge tray 60 between the operating position and the non-operating position. It is a block diagram.
2, parts corresponding to the respective parts shown in FIG. 1 are indicated by the same reference numerals as the respective parts in FIG. In this embodiment, the frame 64 is moved in parallel with respect to the left, right, up, and down while keeping its posture constant according to the principle of a parallelogram link. Reference numerals 88 and 90 denote a pair of links, and the pair of links together with a part of the frame body 64 and a part of the frame body 56 of the stencil printing machine form a parallelogram link. That is, the links 88 and 90 are pivotally connected at their upper ends to the frame 64 by pivots 92 and 94, respectively, and at their lower ends they are pivotally connected to the frame 56 of the stencil printer by pivots 96 and 98. . Also in this case,
By means of a handle 80 similar to that in the embodiment of FIG. 1, the paper output tray 60 can be easily moved between the operating position shown by the solid line in the figure and the non-operating position shown by the phantom line in the figure. It will be clear that when brought into the actuated position, it is securely locked there.

FIG. 3 is a schematic plan view of a stencil printing machine showing still another embodiment relating to the structure for guiding the paper discharge tray 60 between the operating position and the non-operating position. Printing paper supply unit 4
2, the frame 56 of the stencil printing machine, the various devices provided therein, and the discharge unit 54 may have the same basic configuration as shown in FIGS. 1 and 2. In this embodiment, the paper output unit 54
The paper ejection tray 60 is movably mounted on the frame 56 by a pivot 100 extending in the vertical direction between an operating position and a non-operating position in a manner shown by an arrow in the figure. A pinch roller 66 and a printing paper skipping roller 72 similar to those in the embodiment shown in FIGS. 1 and 2 are supported on the paper tray 60. Further, the rotation pulling out of the paper discharge tray 60 from the operating position to the non-operating position is performed by the handle 80 shown in FIGS.
It may be performed by a handle similar to. The embodiment shown in FIG. 3 requires almost no space for moving the discharge tray to the non-operating position in the lateral width direction when viewed from the front of the stencil printing machine, as compared with the embodiments shown in FIGS. 1 and 2. It has the advantage of not being taken.

Although the present invention has been described in detail with respect to three embodiments, it will be apparent to those skilled in the art that various modifications can be made within the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a stencil printing machine according to the present invention as a whole with an emphasis on the structure of a plate discharge section.

FIG. 2 is a view similar to FIG. 1, showing another embodiment of the stencil printing machine according to the present invention.

FIG. 3 is a schematic plan view showing still another embodiment of the stencil printing machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Printing drum 12 ... Inking roller 14 ... Backing roller 15 ... Clamping area 16 ... Yokoki 18 ... Clamp 20 ... Plate making part 22 ... Stencil sheet roll 24 ... Stencil sheet 26 ... Punching means 28 ... Cutter 30 ... Original reading Part 32 ... Light source 34 ... Photo diode 36 ... Rail 38 ... Glass plate 40 ... Original reading head 42 ... Printing paper feeding unit 44 ... Paper feeding table 46 ... Printing paper take-out roller 48 ... Printing paper separating roller 50 ... Timing roller 51 ... Clamp 52 ... Plate discharging device 54 ... Paper discharging section 56 ... Stencil printer frame 58 ... Rail 60 ... Paper discharging tray 62 ... Paper discharging tray 64 ... Frame 66 ... Pinch roller 68 ... Peeling claw 70, 72 ... Printing paper skipping roller 74 ... Printing paper ejection guide 78 ... Axis 80 ... Handle 82 ... Non-return groove 84 ... Pin 86 ... Slope 88, 90 ... Link 92 , 94, 96, 98 ... Axis

Claims (5)

[Claims] 1. A printing drum around which a stencil sheet is wound, and a back-pressing roller which is arranged so as to face the printing drum, and which passes through a sandwiched region between the printing drum and the back-pressing roller. The stencil printing is performed by applying ink from the perforated stencil sheet wound around the printing drum to the printing paper to be sent by the stencil printing, and the printing paper exiting the stencil area is the printing paper exit side of the stencil area. A stencil printing machine having sandwiching rolling feeding means for sandwiching and feeding in the paper discharge direction between two rolling bodies, wherein one rolling body of the sandwiching rolling feeding means is in an operating position and a non-drawing state. A stencil printing machine, characterized in that the stencil printing machine is provided on a paper discharge table movable between operating positions. 2. The stencil printing machine according to claim 1, further comprising locking means for locking the paper ejection tray at the operating position, wherein the locking means disengages the paper ejection tray from the operating position. It is configured to interlock with a handle for pulling out to an operating position, and to release the locked state by a force applied to the handle in a direction of pulling out the paper ejection tray from the operating position to the non-operating position. And a stencil printing machine. 3. A stencil printing machine according to claim 1 or 2, characterized in that the movement of the paper discharge table is guided by rails. 4. A stencil printing machine according to claim 1 or 2, characterized in that the movement of said delivery tray is guided by a parallelogram link. 5. A stencil printing machine according to claim 1 or 2, characterized in that the movement of said delivery tray is guided by a pivot.