JP2553990B2 - Plate making and printing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine provided with storage means for temporarily storing a stencil sheet after plate making.
The stencil sheet is made on the subsequent stencil sheet, and the stencil sheet on which the stencil sheet is made is temporarily stored in the storage means.

[0002]

2. Description of the Related Art A conventional plate-making printing apparatus is disclosed in, for example, Japanese Patent Laid-Open No.
As described in Japanese Unexamined Patent Publication No. 7-13106 and Japanese Patent Laid-Open No. 59-7082, although the plate making means and the printing means are provided, the plate making means and the printing means operate individually in a time series in any of the devices. It is configured to do.

That is, when forming a document image on a stencil sheet, only the plate making means operates, and when printing on a printing paper, only the printing means operates. Also,
A plate-making printing apparatus has also been proposed in which the stencil sheet is temporarily loosened until an original image corresponding to one original is made (Japanese Utility Model Publication No. 59-169960).

[0004]

As described above, in the prior art, either one of the plate making means and the printing means is provided, though the apparatus is equipped with the plate making means and the printing means. It is configured so that it can only operate.

Therefore, the plate making time and the printing time do not overlap with each other, and the total time is the total printing time.
When printing several hundred sheets or more per sheet, the ratio of the plate making time to the total printing time is small, which is not a big problem, but when printing about 20 to 30 sheets per document. , The ratio of plate making time is relatively large.

If it takes 25 seconds to make a plate of one original and 0.5 seconds (120 sheets / 1 minute) to print on one sheet of printing paper, 500 sheets are printed. The total printing time for printing one original on paper is 2
5 + 500 × 0.5 = 275 (seconds). in this case,
Plate making time accounts for 25/275 of total printing time
= 0.09, which is only 9%. On the other hand, 50
When printing one original on one printing sheet, the total printing time is 25 + 50 × 0.5 = 50 (seconds), and the ratio of the plate making time to the total printing time is 25/50 = 0.
5, the plate making time and the printing time become equal.

By the way, in recent years, due to the reduction of printing cost and the improvement of printing quality, a rotary copying machine is being used in place of the electronic copying machine, and along with it, various kinds of small-sized copies are also copied. ing. Therefore, in some cases, one document may be printed on about 20 sheets of printing paper, but in such a case, the platemaking time accounts for 70% of the total printing time.

As described above, if the printing time for one original is reduced, it is undeniable that the conventional plate-making / printing apparatus is deteriorated in printing efficiency. The present invention has been made in view of the problems of the related art, and aims to improve printing efficiency by simultaneously performing a plate making operation and a printing operation.

[0009]

According to the present invention, there is provided a stencil sheet supplying means for supplying a stencil sheet, a plate making means for performing all plate making steps of an original image on the supplied stencil sheet, and an original image is made by plate making. Storage means for temporarily storing the existing stencil paper,
A plate cylinder provided with a clamper for holding the downstream side edge of the stencil sheet, and a printing means for rotating the plate cylinder while the downstream side edge of the stencil sheet is held by the clamper to print on printing paper; In the stencil printing machine provided with, the stencil sheet, in a state in which the downstream side edge is not held by the clamper of the plate cylinder, the plate cylinder is rotated to make a plate during printing,
It is characterized by being stored in a storage means.

[0010]

In the present invention, the stencil sheet is made in the plate cylinder regardless of the rotation of the plate cylinder and is stored in the storage means in a state where the downstream edge thereof is not held by the clamper of the plate cylinder. While the printing operation is being executed on the preceding stencil sheet held by the clamper, the subsequent stencil sheet is made into a plate.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of the left side portion of a plate making and printing apparatus as one embodiment of the present invention, and FIG. 2 is a block diagram of the right side portion thereof. 3 shows the front part of the time chart, and FIG.
Shows the latter part of the time chart. 5 is a plan view of the gripper, and FIG. 6 is a side view thereof. 7 is a plan view of the stencil sheet.

First, the overall structure of the plate-making printing apparatus will be described. In FIG. 1 and FIG. 2, a document table 3 on which a plurality of documents 2 ... A separation roller 4 and a paper feeding roller 5 are provided at the base of the document placing table 3 so as to separate and feed the stacked documents 2 one by one from the lowermost one. The separating roller 4 and the paper feeding roller 5 are both configured to be driven intermittently in the counterclockwise direction. Photosensors 6, 6 for detecting the original 2 are provided on the downstream side of the paper feed roller 5.

On the downstream side of the photosensors 6, 6, there are provided a first conveying roller 8 for conveying the original 2 and a roll-shaped heat-sensitive stencil printing base paper 7 (hereinafter simply referred to as base paper) in an overlapping manner. 9 is provided. The base paper used here is a conventionally known one in which a heat-sensitive film and a porous thin paper are superposed. One-way clutches are provided on the drive shafts of the first conveying rollers 8 and 9 and the paper feeding roller 5, and the rollers 8 9 and 5 convey the original paper 7 and the original 2 only. When a force is applied and the base paper 7 is conveyed by the grippers 24 and 32 described later, the base paper 7 is driven.

On the downstream side of the first conveying rollers 8 and 9, there is provided a cylindrical cutter 10 in which a slightly twisted blade is planted on the circumferential side of the rotary shaft. The base paper 7 is cut into a length corresponding to a desired original image. The cutting timing by the cutter 10 will be described later.

Downstream of the cutter 10, second conveying rollers 11 and 12 similar to the first conveying rollers 8 and 9 are provided.
Is provided. A plate making machine 13 that forms a document image on the base paper 7 is located downstream of the second transport rollers 11 and 12. The plate making machine 13 includes a pressed plate 14 that holds the upper surface of the original 2, a transparent glass plate 15 that presses the base paper 7 and the original 2 against the pressed plate 14, and a flash lamp mounted on the back surface of the transparent glass plate 15. 16 and a pressure device 17 for raising both the transparent glass plate 15 and the flash lamp 16. The pressurizing device 17 is composed of an air cylinder, but may be composed of a motor and a cam.

A third conveying roller 18 is provided on the downstream side of the plate making machine 13, and the third conveying roller 1 is provided.
A peeling roller 20, which is rotatably mounted on the free end of the rocking lever 19, is pressed against the roller 8. The angle formed by the tangent line at the contact point between the third conveying roller 18 and the peeling roller 20 and the plane of the glass plate 15 is the base paper 7a.
The original document 2 is set to about 60 so that it can be easily peeled off. In the following, the base paper after plate making is shown as 7a, and the base paper after printing is shown as 7b.

Below the third transport roller 18, a storage chamber 21 for temporarily storing the plate-making base paper 7a on which the original image is formed is formed. 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 transport roller 18.

The printing machine 23 comprises a single cylinder type plate cylinder 25, a press roller 27 for pressing the printing paper 26 against the plate cylinder 25, and the like. A clamper 28 that holds the downstream edge of the base paper 7a is provided in the non-printing area of the plate cylinder 25. The clamper 28 is closed by a cam 29 provided in the apparatus main body 1 and will be described later. It is configured to be opened by the plate discharge machine 30. Since the structure of the plate cylinder 25 itself is the same as a conventionally well-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 stretched over, and the timing belts 31 and 31 are used for the base paper. A gripper consisting of a lower support piece 24 and an upper tongue piece 32 for sandwiching the downstream side edge portion of 7 is attached. This gripper 24, 3
Details of 2 will be described later.

On the left side of the plate cylinder 25, the clamper 2
8 is opened and the base paper 7b after completion of printing is printed on the plate cylinder 25.
A plate discharge machine 30 is provided for removing the plate. The plate discharging machine 30 peels the base paper 7b from the plate cylinder 25 when the clamper 28 is opened (means not shown).
3 and a pair of gears 35 and 36 for storing the peeled base paper 7b in the base paper storage box 34, and the base paper storage box 34 is attached to the apparatus main body 1 in a horizontal direction so as to be detachable.

At the lower left side of the apparatus main body 1, there are provided a conventionally known paper feed tray 37 and paper feed rollers 38 on which pre-printed paper 26 is stacked. The uppermost paper 26 and the plate cylinder 25 are sequentially arranged. The paper is fed between the press roller 27. Further, on the lower right side of the apparatus main body 1, 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.

The apparatus is sequence-controlled by a microcomputer so that the plate making machine 13 and the printing machine 23 can operate simultaneously. That is, while the preceding base paper 7b is wrapped around the plate cylinder 25 and printed, the next original image is formed on the following base paper 7a (see FIG. 4). As shown in FIG. 7, one side edge of the base paper 7 has an interval corresponding to the length of the original image (first area) that can be formed by one flash when forming the original image. Flash timing marks 41 ... Are provided, and a photo sensor (not shown) for detecting the marks 41 ... Is provided in the apparatus main body 1 at the upstream edge of the transparent glass plate 15. There is.

The flash timing mark 41 ...
Is printed on the base paper 7 in advance, but if it is detected by the photo sensor, it can be displayed by a through hole or formed by attaching a small piece of aluminum foil. Is.

Next, the operation of this apparatus will be described mainly with reference to FIGS. The base paper 7 is the first,
The second conveying rollers 8, 9, 11, 12 are slightly fed to the plate making machine 13 side, and the downstream edge thereof is at the downstream side (position A) of the second conveying rollers 11, 12. It is clamped by the grippers 32 and 24 and stopped.

In such a state, the operator places the document table 3
When a start switch (not shown) is operated after a plurality of originals 2 ... Are placed on the grippers 32, 24.
Moves forward in the downstream direction while sandwiching the base paper 7, and stops at the upstream side (position B) of the plate cylinder 25.

At this time, the first and second transport rollers 8,
9, 11, and 12 are driven as the base paper 7 moves. When the grippers 32 and 24 move forward, the peeling roller 20 moves away from the third conveying roller 18 and retreats to a position (dotted line position in FIG. 2) that allows the grippers 32 and 24 to pass. There is.

At the same time that the base paper 7 is started to be fed,
Both the separation roller 4 and the paper feed roller 5 for the originals 2 ... Rotate slightly counterclockwise, and only the lowermost original 2 is separated. When the separated original 2 is detected by the photo sensors 6 and 6, the separation roller 4 is fixed and the paper feed roller 5 is driven, but at this time, the downstream side edge of the original 2 is already in the first position. It is sent between the first conveying rollers 8 and 9.

Therefore, the original 2 is conveyed together with it overlaid on the base paper 7. When the grippers 24 and 32 reach the position B, the downstream edge of the document 2 is located downstream of the transparent glass plate 15 of the plate making machine 13. Further, at this time, the first flash timing mark 41 of the base paper 7 is detected by the sensors 42, 42, but at this time, no flash light is emitted yet and the base paper 7 and the original 2 are merely stopped. .

While the base paper 7 and the original 2 are stopped,
The pressurizing device 17 of the plate making machine 13 operates to operate the transparent glass plate 15
Rises, and the base paper 7 and the original 2 are pinched by the pressed plate 14 and the transparent glass plate 15. When the flash lamp 16 emits a flash light in this state, a document image is formed on the first area (see FIG. 7) of the base paper 7 by the flash light. This image forming action is well known and will not be described.

When the formation of the original image in the first area is completed, the pressing device 17 moves in reverse, the transparent glass plate 15 descends, and the original paper 7a and the original 2 after plate making are in a non-pressed state. .

Then, the rocking lever 19 rotates, and the peeling roller 20 is brought into pressure contact with the third conveying roller 18, and this third roller
The transport roller 18 of 1 starts rotating counterclockwise. Along with that, the first and second conveying rollers 8, 9, 11, 1
2 also starts driven rotation.

Then, the original 2 and the base paper 7a are conveyed to the downstream side, and are peeled off sequentially by the peeling roller 20 from the downstream edge portion. Then, the document 2 is discharged upward along the guide plate 22, and the document 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, 42 by conveying the base paper 7a to the downstream side, that is, the second area of the original 2 is on the transparent glass plate 15. When the third conveyance roller 18 is reached, the third conveyance roller 18 is stopped and the first and second conveyance rollers 8, 9, 11, 12 that are driven accordingly are also stopped.

Thereafter, the same steps as those described above are repeatedly executed 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 occurring between the first area and the second area of the base paper 7, the conveyance dimension is controlled so that both areas slightly overlap each other. To facilitate this control, the flash timing mark 41.
.. may be set to be slightly shorter than the length of the original image made by one flash.

In this way, when the original paper 7 and the like are intermittently conveyed 6 times for one original 2 and the flash lamp 16 is flashed 6 times in synchronization with the stop, the entire original area of one original is extended. A document image is formed on the base paper 7, and the plate making process is completed. In this apparatus, the entire area of the original image is formed on the base paper 7 by six flashes, but the number of times can be reduced by increasing the size of the flash lamp 16 etc. and increasing the output. is there.

When the plate making operation is completed, the gripper 2
Reference numerals 4 and 32 further advance to a position (C position) immediately before the clamper 28 of the plate cylinder 25 to release the base paper 7a. Base paper 7a
At the same time that the downstream edge of the plate cylinder 25 is released from the grippers 24, 32, the clamper 28 of the plate cylinder 25 is closed, and the downstream edge of the base paper 7 is clamped by the clamper 28 of the plate cylinder 25.

After that, the grippers 24 and 32 return to the B position. At this time, the cutting timing mark 4
1 is detected by the photo sensors 42, 42, and the base paper 7 is cut by the cutter 10.

When the plate cylinder 25 is rotated 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 2
It is mounted on the plate cylinder 25 while being separated by 4, 32. 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 manner, the lever 19 rotates clockwise while the first original 2 is being printed,
The peeling roller 20 is separated from the third conveying roller 18 again, and the grippers 24 and 32 return to the original position A. After the grippers 24 and 32 are once opened,
The first and second conveying rollers 8, 9, 11, 12 are driven, and the downstream edge of the second base paper 7 is gripper 24,
It is inserted between 32 and pinched. At this point, one cycle is completed, but the time required so far is 30 seconds after the operation of the start switch.

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

When the printing of the predetermined number of sheets of the first original 2 is completed, the plate discharging machine 30 operates and the printed base paper 7b is stored in the base paper storage box 34. In addition, plate discharge machine 3
0 may be operated immediately after the printing of a predetermined number of sheets is completed.
Further, when the subsequent master paper 7a after plate making is stored in the storage chamber 21 by appropriately selecting the sequence, the step of storing the base paper 7b in the storage box 34 and the plate cylinder 25 of the subsequent base paper 7a are stored. It is also possible to continuously carry out the winding step for.

Thus, while the second original 2 is being printed, the original image of the third original 2 is formed on the original paper 7, and thereafter all originals on the original placing table 3 are printed. 2 is printed until the last document 2 is printed, which is not shown in FIG.
Stops its operation.

As the plate making means, a dot printer or a thermal printer having a thermal head can be used in addition to the plate making machine 13 used in the present apparatus. By using such a printer, it is possible to directly make a desired original image without the original 2.

[0044]

According to the present invention, the stencil sheet is plate-made independently of the rotation of the plate cylinder and stored in the storage means in a state where the downstream edge of the stencil sheet is not held by the clamper of the plate cylinder.
When printing multiple originals in sequence, the subsequent originals are printed while the preceding originals are being printed, so the platemaking time can be ignored depending on the number of prints, and printing will be performed after the platemaking is completed as with conventional devices. You don't have to. Therefore, the total printing time can be shortened and the printing operation can be performed efficiently.

Recently, a large number of various office automation equipments are installed in offices and the like, and it is expected that demands for printing various kinds of small amounts and demands for cost reduction and speeding up will increase more and more. By implementing it, it becomes possible to sufficiently meet the demand and demand.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a left side portion of a plate-making printing apparatus that is an embodiment of the present invention.

FIG. 2 is a configuration diagram of a right side portion of the plate-making printing apparatus that is an embodiment of the present invention.

FIG. 3 is a front part of a time chart according to an embodiment of the present invention.

FIG. 4 is a latter part of the time chart of the embodiment of the present invention.

FIG. 5 is a plan view of the gripper according to the embodiment of the present invention.

FIG. 6 is a side view of the gripper according to the embodiment of the present invention.

FIG. 7 is a plan view of a stencil sheet used in one embodiment of the present invention.

[Explanation of symbols]

 1 Device Main Body 2 Original 3 Original Placement Table 4 Separation Roller 5 Feeding Roller 6 Photo Sensor 7 Base Paper 7a Base Paper 7b Base Paper 8 First Conveying Roller 9 First Conveying Roller 10 Cutter 11 Second Conveying Roller 12 Second Conveying Roller 13 Plate making machine 14 Pressed plate 15 Transparent glass plate 16 Flash lamp 17 Pressurizing device 18 Third transport roller 19 Swing lever 20 Peeling roller 21 Storage chamber 22 Original guide plate 23 Printing machine 24 Gripper 25 Plate cylinder 26 Printing paper 27 Press Roller 28 Clamper 29 Cam 30 Plate Ejector 31 Timing Belt 32 Gripper 33 Peeling Claw 34 Base Paper Storage Box 35 Gear 36 Gear 37 Paper Tray 38 Paper Feed Roller 39 Conveyor 40 Paper Ejection Tray 41 Flash Timing Mark 42 Sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-42202 (JP, A) JP-A-59-96983 (JP, A) Actual opening Sho-59-169960 (JP, U) Actual opening Sho-56- 144638 (JP, U)

Claims (4)

(57) [Claims] 1. A stencil sheet supplying means for supplying a stencil sheet, a plate making means for executing all plate making steps of an original image on the supplied stencil sheet, and a stencil sheet on which the original image is made is temporarily stored. And a printing cylinder provided with a clamper for holding the downstream edge of the stencil sheet, and the printing drum being rotated by the printing drum while the downstream edge of the stencil sheet is held by the clamper. In a plate-making printing apparatus provided with a printing unit for printing, the stencil sheet is in a state in which a downstream edge thereof is not held by a clamper of the plate cylinder, and the plate cylinder is rotated to make a plate during printing . A plate-making printing apparatus, which is stored in a storage unit. 2. The plate-making / printing apparatus according to claim 1, wherein the stencil sheet is wound in a roll shape, and a cutter for cutting the stencil sheet to a predetermined size is provided in a transfer passage of the stencil sheet. 3. A base paper peeling means for peeling the stencil base paper after printing from the plate cylinder is provided.
The plate-making printing device described. 4. The plate-making printing apparatus according to claim 1, wherein the plate-making means comprises a thermal head.