JPH0639193B2 - Stencil printing base paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a band-shaped stencil printing base paper which is used for plate making by a thermal plate making machine, a dot printer or the like, and particularly displays the timing when cutting by a cutter. It is characterized in that a display portion is formed.

(B) Conventional Technology When making a base plate for heat-sensitive stencil printing, in a conventional plate making machine, a flash lamp, which is a flash light source, scans a flash light several times to make a plate over the entire length of the original image.

If the plate making machine and the printing machine are separate devices, there is no problem in making the plate as described above. However, in order to promote the efficiency of printing work, a plate-making printing apparatus in which a plate-making machine and a printing machine are integrated has been proposed (see, for example, Japanese Patent Laid-Open Publication No. Sho.
(See Japanese Patent Publication No. 47-13106), however, when making a plate with such an apparatus, it is difficult to make a plate as described above due to a request for downsizing of the apparatus. This is because the structure becomes complicated and large in size to cover and scan the flash lamp, and it becomes difficult to integrate the plate making machine and the printing machine.

Therefore, when making one original image, the overlapped original and original paper are scanned on a flash lamp, and the original paper on which the original image is made is cut with a cutter, thereby suppressing enlargement and complication. (See Japanese Patent Laid-Open No. 59-7082).

However, if the base paper is conveyed while being sandwiched by rollers or the like, it is not conveyed accurately due to slippage or the like, and variations occur in the position where the cutter cuts, resulting in variations in the length of the cut base paper. Therefore, a base paper having a guide hole for conveyance at the longitudinal edge (see Japanese Patent Laid-Open No. 59-16791), or a reinforcement in the lateral direction with an interval required for one plate-making printing A device provided with a section (see JP-A-59-16788) has been proposed.

(C) Problems to be Solved by the Invention As described above, when the guide holes for conveyance are provided at the longitudinal edges of the base paper, slip does not occur between the roller and the base paper, and the transfer is performed accurately. It is possible to carry out intermittent transportation. However, since the conveyance dimension is determined by the number of rotations (angle) of the conveyance roller, a servo device or the like for accurately driving the conveyance roller is required, which inevitably leads to high price and complexity.

In addition, even if a reinforcing portion is provided in the lateral direction at an interval necessary for one plate-making printing, this reinforcing portion strengthens the cut portion of the base paper, not the display portion. Or formed by applying acrylic resin,
It is not detected by a photo sensor.

Note that this problem is not limited to the heat-sensitive stencil printing base paper, and the same applies to the base paper of a type in which a dot printer or a thermal printer is applied to make a plate.

The present invention has been made in view of the above-described problems of the conventional belt, and even if a servo mechanism is not attached to the conveying roller,
It is intended to realize a stencil sheet that can be accurately conveyed and cut at an accurate position.

(D) Means for Solving the Problems In the present invention, a document image forming area in which a document image is formed and a non-image forming area in which a document image is not formed are alternately formed along the extending direction. In a strip-shaped stencil printing paper in which an image forming area is cut and separated by a cutter, a plurality of optical sensors that can be optically detected by a photosensor are displayed along the extending direction of the stencil printing paper for displaying the timing of cutting by the cutter. A display unit is formed in the non-image forming area, and the interval between the display units is set to a total size of the length dimension of the original image forming area and the length dimension of the non-image forming area, and the display unit Is a stencil printing base paper, which is formed at a site different from the cutting position.

(E) The length of the base paper can be adjusted to the desired size by controlling the feed size of the base paper (controlling the timing of cutting by the cutter) by detecting the display section formed on the working base paper with the photo sensor. Can be matched accurately.

(F) Embodiments FIG. 1 is a plan view showing a heat-sensitive stencil printing base paper as an embodiment of the present invention, and FIGS. 2 to 5 are configuration diagrams showing a plate-making printing apparatus to which the base paper of the present invention can be mounted. FIG. 6 is a time chart thereof, and FIG. 7 is a plan view showing another embodiment of the present invention.

In order to clarify the meaning of the “display section” which is the main part of the base paper of the present invention, the overall structure of the plate-making printing apparatus will be described first. In FIG. 2, an original placing table (3) on which a plurality of originals (2) are stacked is mounted on the upper right end of the apparatus main body (1). A separation roller (4) and a paper feed roller (5) are provided opposite to the base of the document placing table (3) to separate and feed the stacked documents (2) ... Has been done. The separating roller (4) and the paper feeding roller (5) are both configured to be driven intermittently in the counterclockwise direction. Photo sensors (6) and (6) for detecting the document (2) are provided on the downstream side of the paper feed roller (5).

On the downstream side of the photosensors (6) and (6), a first (2) and a roll-shaped heat-sensitive stencil printing base paper (hereinafter simply referred to as “base paper”) (7) are superposed and conveyed. The transport rollers (8) and (9) are provided. The base paper that acts here is a conventionally known one in which a heat-sensitive film and porous thin paper are superposed. The first transport roller (8)
One-way clutches are provided on the drive shafts of (9) and the paper feed roller (5), and the rollers (8), (9) and (5) convey the raw paper (7) and the original (2). The carrying force is applied only when the base paper (7) is carried by the grippers (24) and (32), which will be described later, and is driven.

A cylindrical cutter in which a slightly twisted blade is planted on the circumferential side of the rotary shaft on the downstream side of the first conveying rollers (8) and (9).
(10) is provided, and the cutter (10) cuts the roll-shaped base paper (7) into a desired length (length corresponding to one original image). The cutting timing of the cutter (10) will be described later.

On the downstream side of the cutter (10), the first conveying roller
Second transport rollers (11) and (12) similar to (8) and (9) are provided.

The base paper (7) is provided on the downstream side of the second transport rollers (11) and (12).
A plate-making machine (13) for forming a document image is located on. The plate making machine (13) includes a pressed plate (14) for holding the upper surface of the original (2),
A transparent glass plate (15) for pressing the base paper (7) and the original document (2) against the pressed plate (14), a flash lamp (16) mounted on the back surface of the transparent glass plate (15), and a transparent glass plate. It comprises a pressure device (17) for raising both the flash lamp (16) and the flash lamp (15). Although the pressurizing device (17) is composed of an air cylinder, it may be composed of a motor and a cam.

A third transport roller (18) is provided on the downstream side of the plate making machine (13), and the third transport roller (18) rotates at the free end of the swing lever (19). The peeling roller (20), which is freely mounted, is in pressure contact. This third transport roller (1
The angle between the tangent at the contact point between 8) and the peeling roller (20) and the plane of the glass plate (15) should be about 60 ° to facilitate peeling of the base paper (7a) and the original (2). It is set.
In the following, the base paper after plate making is shown in (7a), and the base paper after printing is shown in (7b).

A storage chamber (21) for temporarily storing the plate-making base paper (7a) on which the original image is formed is formed below the third conveying roller (18).

Further, a document guide plate (22) for discharging the document (2) separated from the base paper (7a) by the separation roller (20) is provided on the downstream side of the third conveying roller (18).

The printing machine (23) includes a single cylinder plate cylinder (25), a press roller (27) for pressing the printing paper (26) against the plate cylinder (25), and the like. A clamper (28) for holding the downstream side edge of the base paper (7a) is provided in the non-printing area of the plate cylinder (25), and the clamp (28) is provided in the apparatus body (1). Cam (29)
It is configured so that it is closed by and is opened by the plate discharge machine (30) described later. Since the structure of the plate cylinder (25) itself is the same as the conventionally known one, its description is omitted.

From the position where the cutter (10) is provided to the position where the plate cylinder (25) is provided, a pair of endless timing belts (31) and (31) are spanned, and the timing belt (3
1) and 31) are equipped with grippers, which are composed of a lower support piece (24) and an upper tongue piece (32), for holding the downstream edge of the base paper (7). Details of the grippers 24, 32 will be described later.

On the left side of the plate cylinder (25), a plate discharge machine (30) for opening the clamper (28) and separating the base paper (7b) after printing from the plate cylinder (25) is provided. There is. This Plate Removal Machine (30)
Means for opening the clamper (28) (not shown),
A peeling claw (33) for peeling the base paper (7b) from the plate cylinder (25), and a pair of gears (3) for storing the peeled base paper (7b) in the base paper storage box (34).
5) and (36), the base paper storage box (34) is attached to the apparatus main body (1) in a horizontal direction so as to be detachable.

A paper feed tray (37) and a paper feed roller (38), which are well known in the art, on which paper (26) before printing is stacked is provided on the lower left side of the apparatus body (1).
Are provided, and the plate cylinder (25) is sequentially placed from the topmost paper (26).
And paper is fed between the press roller (27). Further, a conveyor (39) for conveying the printed paper (26) and a paper discharge tray (40) for stacking and storing the discharged paper (26) are provided on the lower right side of the apparatus main body (1). There is.

Note that this apparatus is sequence-controlled by a microcomputer so that the plate making machine (13) and the printing machine (23) can operate simultaneously.

As shown in FIG. 1, on one side edge of the roll-shaped base paper (7) which is an essential part of the present invention, when forming a document image, a document image (first Flash timing mark (41) at an interval (L3) corresponding to the length of the (th region) ...
Is provided, and this mark (41) is provided on the main body (1) of the device.
The photo sensor (not shown) that detects ... is a transparent glass plate
It is provided at the upstream edge of (15). The flash timing marks (41) ... Are printed on the base paper (7) in advance, but they may be displayed as through holes and the through holes may be detected by a micro switch. It can also be formed by sticking a small piece of aluminum foil. The shaded area in FIG. 1 indicates the area where the original image is formed. As is clear from this figure, the length of the document image is L3 × 6 = L4.

On the other side edge parallel to the one side edge on which the flash timing marks (41) are formed, a base paper on which an original image is formed
A cutting timing mark (43) for displaying the cutting timing when cutting (7) is provided, and the apparatus main body (1)
At a certain distance from the upstream edge of the transparent glass plate (15)
Photosensors (42) and (42) for detecting the cutting timing marks (43) are provided on the upstream side only (L5).

The distance (L5) between the transparent glass plate (15) and the sensors (42) (42) is the distance between the upstream edge of the image forming area of the base paper (7) and the cutting timing mark (43). Are set equal.

The dimension (L1) between the downstream cutting edge of the base paper (7) and the first flash timing mark (41a) substantially matches the width dimension of the storage chamber (21), and the upstream cut of the base paper (7) is cut. The size (L2) of the edge and the seventh flash timing mark (41b) for one original is the transparent glass plate (15).
It substantially coincides with the distance between the upstream edge and the cutter (10). Length of the non-image forming area on the downstream side of the base paper (7) (L1)
When the base paper (7) is mounted on the plate cylinder (25), the plate cylinder (2
It coincides with a part of the non-image forming area of 5) (see FIG. 2). The upstream non-image forming area of the base paper (7) corresponds to the area indicated by L2 of the plate cylinder (25) shown in FIG. 2, and the original image forming area is indicated by L4. Corresponding to the area.

In the case of an apparatus for printing a B4 size document, the above dimensions are L1 = L2 = 110 mm, L3 = 60 mm, L4 = L3.
× 6 = 360mm is set.

Next, the details of the grippers (24) and (32) will be described mainly with reference to FIGS. Both ends of the lower support piece (24) formed in an E shape are connected to the timing belt (31) (3
It is fixed to 1) with screws (44) .... (45) is a back fixing plate. Shaft holding metal fittings (46) (46) having a U-shaped cross section are fixed to the upper surfaces of both ends of the lower support piece (24) by the screws (44). ), A prismatic tongue fixing shaft (47) is rotatably inserted and held. The tongue fixing shaft (47) is provided with three upper tongues (32), (32) and (32) having an L-shaped cross section.

A first lever (48) and a second lever (49) are provided in one of the shaft holding fittings (46), and the first lever (48) is a tongue fixing shaft (47).
The second lever (49) is fixed to the tongue fixing shaft (47). The lever (48) (49) has
Torsion springs (50) and (51) are attached to each lever
(48) and (49) are urged to rotate counterclockwise (Fig. 5).

The pressure receiving portions of the first lever (48) and the second lever (49) partially overlap each other, and the second lever (49) is attached to the second torsion spring (51) attached to itself. In addition to being urged to rotate counterclockwise, it is further urged to rotate counterclockwise by the first torsion spring (50) mounted on the first lever (48). Therefore, the upper tongue pieces (32) (32) (32)
Is urged to rotate counterclockwise by the total elastic force of the first and second torsion springs (50) (51), and its free end is pressed against the lower support piece (24).

A long fixed cam (52) selectively contacting only the first lever (48) is provided above the plate cylinder (25) in the moving path of the grippers (24) (32). , The transparent glass plate (15)
An elliptical rotary cam (53) that selectively abuts the second lever (49) is provided on the upstream side above.

The gripper (24) (32) reaches the lower part of the fixed cam (52),
When the pressure receiving portion of the first lever (48) comes into contact with the fixed cam (52), the first lever (48) moves the first torsion spring (50).
Rotate slightly clockwise against the elastic force of. Then, the first lever (48) is separated from the lower surface of the second lever (49), the second lever (49) is rotationally biased only by the second torsion spring (51), and the lower support piece ( The pressure force of the upper tongue pieces (32) (32) (32) against the 24 (24), that is, the gripper (24) (3
The clamping force for the base paper (7) of 2) is reduced.

When the grippers (24) (32) reach the lower part of the rotating cam (53) and the rotating cam (53) rotates, the rotating cam (5)
By 3), the second lever (49) rotates clockwise against the resilience of the first and second torsion springs (50) (51), and the tongue fixing shaft (47) accordingly moves. Rotate clockwise. Therefore, the upper tongue pieces (32), (32) and (32) are separated from the lower support piece (24), and the grippers (24) and (32) are opened.

Below the fixed cam (52) and the rotating cam (53), the grippers (24) and (32) arrive at the lower parts of these cams (52) and (53), and these cams (52) and (53) 2) is provided with gripper support bases (54) and (55) for preventing the timing belt (31) from loosening when it is urged downwards (not shown in FIG. 2).

Next, the operation of the present apparatus will be described mainly with reference to FIGS. 1, 2 and 6 (time chart).

The base paper (7) has first and second transport rollers (8) and (9) in advance.
(11) (12) is slightly fed to the plate making machine (13) side, and the downstream edge of the gripper is at the downstream side (position A) of the second conveying rollers (11) and (12). (32) It is pinched and stopped at (24). That is, the rotating cam (53) is not in contact with the second lever (49). In this condition, the operator
When a start switch (not shown) is operated after placing a plurality of originals (2) on the (3), the grippers (32) (24)
Moves downstream while holding the base paper (7), and the plate cylinder (25)
Stops on the upstream side (position B).

At this time, the first and second transport rollers (8) (9) (11) (12)
Is driven by the movement of the base paper (7). When the grippers (32) (24) move forward, the peeling roller (20) moves to the third position up to a position (dotted line position in FIG. 2) that allows the grippers (32) (24) to pass. It is separated from the transport roller (18) and retracted.

At the same time when the base paper (7) is fed, the original (2) ...
Both the separating roller (4) and the paper feeding roller (5) slightly rotate counterclockwise, and only the lowermost original (2) is separated.
When the separated document (2) is detected by the photosensors (6) and (6), the separation roller (4) is fixed and the paper feed roller (5) is driven. The downstream edge of 2) has already been fed between the first transport rollers (8) and (9). Therefore, the original (2) is conveyed together with the original (7) being superposed on the original (7). When the grippers (24) (32) reach the position B, the downstream edge of the original (2) is located downstream of the transparent glass plate (15) of the plate making machine (13). There is. Further, at this time, the first flash timing mark (41a) of the base paper (7) is detected by the sensor, but at this time, no flash light is emitted and the base paper (7) and the original (2) are not It's just stopped.

While the base paper (7) and original (2) are stopped, the plate making machine (1
The pressure device (17) of 3) operates and the transparent glass plate (15) rises, and the base paper (7) and the original (2) are sandwiched between the pressed plate (14) and the transparent glass plate (15). Is pressed. When the flash lamp (16) emits a flash in that state, this flash causes the base paper (7)
An original image is formed in the first area (see FIG. 1) of the. This image forming action is well known and will not be described.

When the formation of the original image of the first area is completed, the pressure device (17) moves backward and the transparent glass plate (15) descends, so that the original paper (7a) and the original (2) after plate making are not It becomes a pinching state.

Next, the swing lever (19) rotates, the peeling roller (20) is brought into pressure contact with the third transport roller (18), and the third transport roller (18) is pressed.
(18) starts rotating counterclockwise. Along with that, the first and second transport rollers (8), (9), (11), and (12) also start driven rotation.

Then, the original (2) and the base paper (7a) are conveyed to the downstream side,
The peeling roller (20) sequentially peels from the downstream edge. Then, the original (2) is discharged upward along the guide plate (22), and the raw paper (7a) is loosened and sequentially fed into the lower storage chamber (21).

When the second flash timing mark (41) is detected by the sensors (42) and (42) as the base paper (7a) is conveyed to the downstream side, that is, the second area of the document (2) is detected. When the transparent glass plate (15) arrives on the transparent glass plate (15), the third conveying roller (18) is stopped and the first and second conveying rollers (8), (9), (11), (12) are driven accordingly. ) Also stops.

After that, the same steps as those described above are repeatedly performed to form a document image on the second area of the base paper (7), and the base paper (7a) is sequentially stored in the storage chamber (21). At this time, in order to prevent a non-image forming portion from being generated between the first area and the second area of the base paper (7), the conveyance size is controlled so that both areas slightly overlap each other. It To facilitate this control, the interval of the flash timing marks (41) ... Is set to 1
The length may be set to be slightly shorter than the length of the original image made by plate-making by a flash of light. In this way, one manuscript (2)
Therefore, when the base paper (7) is intermittently conveyed 6 times and the flash amplifier (16) flashes 6 times in synchronization with the stop, the original image is printed on the base paper (7) over the entire area (one original length). Is formed and the plate making process is completed. With this device,
The entire area of the original image is formed on the base paper (7) by 6 flashes, but the flash lamp (16) etc. is enlarged,
It is possible to reduce the number of times by increasing the output.

When the plate making operation is completed, the grippers (24) (32) are moved to the plate cylinder (2
It moves forward to the position (C position) just before the clamper (28) of 5), that is, the lower position of the fixed cam (52). Then, as described above, the gripping force of the grippers (24) and (32) with respect to the base paper (7) is reduced by the fixed cam (52). Raw paper in that state
The downstream edge of (7) is clamped by the clamper (28) of the plate cylinder (25).

After that, the grippers (24) and (32) return to the position B. At this time, the cutting timing marks (43) are detected by the photo sensors (42) and (42), and the base paper (7) is cut by the cutter (10). ) Is disconnected. At this time, the photo sensor (42)
The distance between (42) and the cutter (10) is the cutting timing mark (43) and cutting position of the base paper (7) (see FIG. 1).
If the distance (L2-L5) is the same as the distance (L2-L5), the cutting timing mark (43) is the photo sensor (42) (42).
At the same time, the cutter (10) operates and the base paper (7) is cut. On the other hand, the photo sensor (4
2) The distance between (42) and the cutter (10) is the base paper (7)
Longer than the distance (L2-L5) between the cutting timing mark (43) and the cutting position of the photo sensor (42)
When the positions of (42) and the cutter (10) are opposite to each other, the cutting timing mark (43) shows the photo sensor (42).
After being detected by (42), the cutter (1
0) operates and is disconnected.

When the plate cylinder (25) rotates counterclockwise at a low speed at the same time when the base paper (7) is cut, the plate-made base paper (7a) stored in the storage chamber (21) is pulled out and the gripper (24 ) (32) is mounted on the plate cylinder (25) while being handled. Subsequently, two test prints are performed and the preparation for printing is completed, but the time required up to this point is 25 seconds.

After that, a predetermined number of sheets are printed.

In this way, while the first original (2) is being printed, the lever (19) rotates clockwise and the peeling roller (20) moves from the third conveying roller (18). The grippers (24) and (32) are separated again and return to the original position (position A). Then, the rotary cam (53) rotates, and the grippers (24) (32) once open. In that state, the first and second transport rollers (8) (9) (1
1) and 12) are driven, and the downstream edge of the second base paper (7) is inserted between the grippers (24) and (32).

When the rotary cam (53) further rotates and separates from the second lever (49), the base paper (7) is firmly held by the grippers (24) and (32). At this point, one cycle is completed, but the time required so far is 30 seconds after the operation of the start switch.

Then, through the same steps as described above, the second original (2)
The original image of is formed on the base paper (7). That is, while the first original document (2) is being printed, the original image of the second original document (2) is formed on the original paper (7) and stored in the storage chamber (21).

When the printing of the predetermined number of sheets of the first original document (2) is completed, the plate discharger (30) operates and the printed base paper (7b) is stored in the base paper storage box (34).

Thus, while the second original document (2) is being printed, the original image of the third original document (2) is formed on the original paper (7), and thereafter, the original placing table (3) is formed. The above steps are repeated until all the originals (2) ... Are printed, and although not shown in FIG. 6, when printing of the last original (2) is started, the plate making machine (13) is started.
Stops its operation.

Although the base paper (7) of this embodiment is wound in a roll, it is alternately folded (folded) in the opposite direction as used in computer terminals. It may be one.

FIG. 7 is a plan view showing a stencil printing base paper made by a dot printer as another embodiment of the base paper of the present invention. In this embodiment, since the plate is not made by flash light, only the cutting timing marks (43) are provided, and the position thereof is at the center of the non-image forming area of the base paper (7).

The base paper of the present invention is not limited to the heat-sensitive stencil printing base paper and the dot printer base paper, but may be a stencil printing base paper that can be made by a laser printer, a thermal printer or the like.

(G) Effect of the Invention In the present invention, a plurality of display portions are formed along the extending direction of the base paper, and the intervals between the display portions are set to a dimension corresponding to the length of one original image. Therefore, when the base paper is intermittently conveyed based on the fact that the display unit is detected by the photo sensor, the base paper can be accurately conveyed, and the length of the base paper can be cut into an accurate dimension.

Therefore, a servo device for transporting the base paper is not required, and the plate can be easily and accurately made by using an inexpensive and simple plate making machine.

Further, the display portion is formed in the non-image forming area, and the interval is set to the total size of the length dimension of the original image forming area and the length dimension of a certain area in the non-image forming area. , The display portion can be arranged not only near the side edge of the stencil printing paper but also near the central portion, and the installation position of the photosensor can be freely selected, and the degree of freedom in design is improved. .

Further, since the display portion is always formed at a portion different from the cutting position, the photo sensor and the cutter do not interfere with each other.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the base paper of the present invention, FIGS. 2 to 6 show a plate making / printing apparatus to which the base paper of the present invention is mounted, FIG. 2 is an overall configuration diagram, and FIG. 3 is a gripper. 4 is a plan view of the gripper, FIG. 5 is a side view corresponding to FIG. 4, FIG. 6 is a time chart, and FIG. 7 is another embodiment of the base paper of the present invention. It is a top view shown. (2) …… manuscript, (7) (7a) (7b) …… heat sensitive stencil base paper,
(10) …… Cutter, (43) …… Cut timing mark (display).

Claims (1)

[Claims] 1. An original image forming area on which an original image is formed and a non-image forming area on which an original image is not formed are alternately formed along the extending direction, and the non-image forming area is cut and separated by a cutter. In the strip-shaped stencil printing paper, a plurality of display portions, which can be optically detected by a photosensor, are displayed in the non-image forming area along the extending direction of the stencil printing paper for displaying the timing of cutting by the cutter. The distance between the display portions is set to the total length of the length dimension of the original image forming area and the length dimension of the non-image forming area, and the display portion is formed at a portion different from the cutting position. The stencil sheet for stencil printing.