JP2001199612A - Defective extracting device for sheet printed book - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate defectives of printed books from non-defectives and to extract them easily and certainly. SOLUTION: This defective extracting device for a sheet printed book comprises a supply device 11 for supplying the sheet printed book 20 and an accumulating part 15 for accumulating the supplied sheet printed book 20. The accumulating part 15 includes a stopper 13 openably/closably. A detecting part 16 detects a printing state of the sheet printed book 20. A control part 17 closes the stopper 13 based on a signal from the detecting part 16 when the non- defective signal is inputted, abuts the non-defective 20a of the sheet printed book 20 on the stopper 13 to fall it to the accumulating part 15. When a defective signal is inputted, the control part 17 opens the stopper 13, and releases the defective to the outside without abutting it on the stopper 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for extracting defective sheets from a plurality of printed sheets, which can easily and reliably extract defective articles.

[0002]

2. Description of the Related Art In general, a plurality of printed sheet-fed books are supplied by a supply device provided downstream of a sheet-fed printing press, sent to a stacking unit, and stacked by the stacking unit. Sheet-fed books are
When a defective product occurs during the printing process, a label serving as a mark is attached to the defective product in the stacking unit. The defective product to which the label has been attached is then discharged out of the line.

[0005] Alternatively, it has been considered that two stacking units are provided, and when a sheet-fed book is supplied by a feeding device, defective products and non-defective products are stacked in separate stacking units.

[0004]

As described above, when a defective product occurs in a sheet-fed book during the printing process, a label is attached to the defective product, and then the defective product is discharged to the outside. However, the operator must select and release the defective product to which the label is attached, which complicates the work of extracting the defective product.

[0005] On the other hand, if the stacking unit is provided at two locations, the total installation area increases.

The present invention has been made in view of the above points, and is a sheet-fed printing apparatus which can easily and reliably remove defective products from a sheet-fed book without increasing the entire installation area. It is an object of the present invention to provide a device for extracting a defective product.

[0007]

According to the present invention, there is provided a supply device provided downstream of a sheet-fed printing press for continuously supplying a plurality of printed sheet-fed books, and a sheet supplied by the supply device. An accumulating unit provided with a stopper for opening and closing the sheet printing book to stop the sheet printing book in contact with the sheet printing book, a detecting unit for detecting a printing state of the sheet printing book, and a stopper based on a detection signal from the detecting unit. And a controller for opening the stopper and discharging the defective sheet-fed book to the outside of the stacking unit when a defective signal or an operator signal is input from the detection unit. This is a sheet-fed printing book defective product extracting apparatus.

According to the present invention, when a defective product signal or an operator signal is input from the detection unit based on a signal from the detection unit, the control unit opens the stopper, and places the defective product on the stopper. It is released to the outside of the stack without contact.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are views showing a first embodiment of a device for extracting defective products of sheet-fed printing books according to the present invention.

As shown in FIGS. 1 and 2, a defective sheet extracting device for a sheet-fed book is provided downstream of a sheet-fed printing press (not shown), and a plurality of printed sheets made of cardboard. The apparatus includes a supply device 11 that continuously supplies the leaf printing books 20 and an accumulation unit 15 that accumulates the plurality of sheet printing books 20 supplied by the supply device 11.

The supply device 11 includes a supply chain 11a.
And a suction unit 12 attached to the supply chain 11a to suction the sheet-fed printing book 20. Note that a gripper may be provided instead of the suction unit 12. In addition, the stacking unit 15 is brought into contact with the sheet printing book 20 supplied from the supply device 11 to stop the sheet printing book 20 and drop the sheet printing book 20 to the stacking unit 15.
A stopper 13 is provided so as to be openable and closable. The first stopper 13 rotates about the support shaft 13 a, and can take a closed position where it comes into contact with the sheet printing book 20 and an open position where it does not come into contact with the sheet printing book 20.

When the first stopper 13 is in the open position, the first stopper 13 is located below the sheet-fed book 20 supplied from the supply device 11 so as to pass the sheet-fed book 20.

The first stopper 13 has a first
A pair of rollers 14 for further sending outwardly defective sheet-printed products 20a discharged outward without contacting the stopper 13.
a and 14b are provided. A pair of rollers 14a, 1
4b, one roller 14a is a driving roller,
The other roller 14b is a driven roller.

A feed mechanism is constituted by a pair of rollers 14a and 14b. The pair of rollers 14a and 14b are configured to hold the defective product 20a and send it outward. In this case, the rollers 14a and 14b are normally separated from each other, and when the defective product 20a is released from the stopper 13 side, the control unit 17 causes the other roller 14b to approach one roller 14a side, and the pair of rollers 14a , 14b hold the defective product 20a. Note that the pair of rollers 14a may be moved closer to the other roller 14b.

It should be noted that the other roller 14b may be fixedly arranged at a certain interval with respect to one roller 14a.

On the upstream side of the stacking unit 15, a sheet-fed book 2
A detection unit 16 for detecting the printing state of 0 is provided, and the control unit 17 controls the driving of the stopper 13 based on a detection signal from the detection unit 16. That is, when the non-defective signal of the sheet printing book 20 is input from the detection unit 16, the control unit 17 closes the first stopper 13 and closes the sheet printing book 2.
The non-defective product 20b is brought into contact with the first stopper 13 and dropped into the collecting section 15. Also, when no defective product signal is input, the stopper 13 is closed.

On the other hand, when a defect signal of the sheet printing book 20 is input from the detection unit 16, the stopper 13 is opened and the defective article 20a of the sheet printing book 20 is moved outward without contacting the stopper 13. Release. The operator operates the control unit 1
The stopper 13 may be opened based on an operator signal generated by operating the printer 7, and the sheet-fed printing book 20 may be discharged outward.

Next, the operation of the present embodiment having the above configuration will be described.

The sheet-fed printing book 20, which is printed and made of relatively thick paper, is provided on the supply chain 11a, and is in the ON state of the suction unit 1.
2 and is supplied to the stacking unit 15. When the suction unit 12 is supplied up to just before the accumulation unit 15,
The sheet-fed printing book 20 is opened, the sheet-fed printing book 20 is opened, and the sheet-fed printing book 20 is moved to the upper part of the stacking unit 15 by the free fall and the inertia of the sheet-fed printing book 20.
Reach.

When the sheet printing book 20 is a non-defective product, the control unit 17 brings the first stopper 13 to the closed position based on a signal from the detection unit 16. At this time, the good sheet 20 of the sheet-fed printing book 20
The b contacts the first stopper 13 and drops into the collecting section 15 to be collected.

Next, when the sheet-fed printing book 20 is defective, the control unit 17 controls the first stopper 1 based on a signal from the detection unit 16.
Bring 3 to the open position. At this time, the defective product 20a of the sheet-fed printing book 20 passes through the first stopper 13 without contacting the first stopper and is discharged to the outside of the stacking unit 15 by inertia.

Defective product 20a discharged outside the accumulation unit 15
Is further fed outward by a pair of rollers 14a and 14b of the feed mechanism. In this case, a pair of rollers 14
a and 14b are normally separated from each other, and the defective product 20a
Is discharged to the outside of the stacking unit 15, the control unit 17 causes the other roller 14b to approach one roller 14a.
Next, the defective product 20a is clamped between the pair of rollers 14a and 14b, and the driving side roller 14a and the driven side roller 14b are sandwiched.
Thus, the defective product 20a is sent outward.

As described above, the pair of rollers 14a, 14b
Are normally separated from each other so that the operator can move the pair of rollers 14a and 14b from the downstream side of the pair of rollers 14a and 14b.
The operator can manually extract the sheet-fed printing book 20 in the stacking unit 15 from between a and 14b as a sample. In addition, as described above, the sheet-fed printing book 20
May be released to the outside.

The pair of rollers 14a and 14b may be fixedly arranged at a predetermined distance from each other as described above, or a plurality of rollers 14a and 14b, for example, two pairs of rollers 14a and 14b may be provided. Good.

As described above, according to the present embodiment, of the sheet-fed printing book 20, the defective product 20a is discharged to the outside of the stacking unit 15 by inertia without abutting against the first stopper 13, and thereafter, The pair of rollers 14a and 14b can smoothly feed the sheet. Therefore, the defective product 20a of the printing book 20 can be easily and reliably released without being selected and extracted by the operator, and can be separated and extracted from the non-defective product 20b. Further, no extra special installation space is required for removing the defective product 20a.

Next, a modification of the present invention will be described with reference to FIGS.

In the modified example shown in FIG. 3, a guide plate 19 for guiding a defective product 20a to the pair of rollers 14a, 14b is provided between the first stopper 13 and the pair of rollers 14a, 14b. This is substantially the same as the other embodiments shown in FIGS.

In FIG. 3, since the conditions such as the speed, weight, specific gravity, etc. of the sheet-fed book 20 differ depending on the operation speed of the printing press and the type of paper to be printed, the defective product 20a which moves by inertia
The way of moving will be different. Therefore, even if the moving direction of the defective product 20 a of the sheet-fed printing book 20 is slightly different, the defective product 20 a
a can be smoothly guided to the pair of rollers 14a and 14b by the guide plate 19.

A modification shown in FIG.
Instead of 4a and 14b, a pair of belt conveyors 21a and 21b are provided as a feed mechanism, and the rest is substantially the same as the embodiment shown in FIGS.

As shown in FIG. 4, the entrances 22 of the pair of belt conveyors 21a and 21b are formed in a divergent shape, and the defective product 20a is easily guided from the divergent entrance 22 into the pair of belt conveyors 21a and 21b. Can be.

In FIG. 4, a pair of belt conveyors 21
a and 21b, the belt conveyor 21b is normally separated from the belt conveyor 21a during normal operation, and
The belt conveyor 21b may be made to approach the belt conveyor 21 only when 0a is released from the stopper 13 side.

In each of the above embodiments, an example is shown in which a pair of rollers 14a, 14b or a pair of belt conveyors 21a, 21b are provided downstream of the stopper 13, but a pair of rollers 14a, 14b or a pair of belt conveyors 21a, 21b are provided. The belt conveyors 21a and 21b do not always need to be provided. In this case, the defective product 20a released without contacting the stopper 13 may be discharged to the outside of the accumulation unit 15 by inertia and own weight.

Second Embodiment Next, with reference to FIGS. 5 to 9, a second embodiment of a sheet-fed sheet reject extracting apparatus according to the present invention will be described. FIG.
The second embodiment shown in FIGS.
A second stopper 18 is provided above the first stopper 13, and the first stopper 13 is provided near the first stopper 13 and the second stopper 18.
And when the second stopper 18 is closed,
Is provided with a protruding cylinder 24 that comes into contact with the sheet-fed book 20 supplied by the printer.

The supply chain 11 a of the supply device 11 is provided with a gripping claw 12 a for gripping the sheet printing book 20 instead of the suction section 12. Further, a pair of rollers 14
Defective products 20a released outward by a and 14b are stored in a discharge receiver 22.

In the second embodiment shown in FIGS. 5 to 9, the same parts as those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals and will be described in detail.

Next, the second stopper 18 will be further described with reference to FIGS. 5 to FIG.
The stopper 18 rotates about the support shaft 18a, and can have a closed position where it comes into contact with the sheet printing book 20 and an open position where it does not come into contact with the sheet printing book 20. In the open position, the second stopper 18 is located above the sheet printing book 20 sent from the supply device 11 and allows the sheet printing book 20 to pass therethrough.

5 to 8, the second stopper 18
The support shaft 18a of the first stopper 13 is provided for convenience.
However, as shown in FIG. 9, the support shaft 13 a of the first stopper 13 is orthogonal to the feed direction of the sheet-fed printing paper 20 supplied from the supply device 11. The support shaft 18a of the second stopper 18 is orthogonal to the support shaft 13a of the first stopper 13.

Six first stoppers 13 are attached to the support shaft 13a in the width direction of the sheet printing book 20, and the second stopper 1
Two pieces 8 are attached to the support shaft 18a in the width direction of the sheet printing book 20.

Further, two protruding cylinders 24 are provided in the width direction of the sheet-fed printing book 20, and the first stopper 13 which opens and closes is operated.
The second stopper 18 and the second stopper 18 do not interfere with each other.

Instead of the first stopper 13 and the second stopper 18 being rotatably provided on the support shafts 13a and 18a, the first stopper 13 and the second stopper 18 can be vertically advanced and retracted by a cylinder (not shown). It may be provided to make contact with the sheet-fed printing book 20.

In FIGS. 5 to 8, the printed sheet book 20 is gripped by the gripping claws 12a provided on the supply chain 11a. The pawl 12a is opened, and the sheet printing book 20 reaches the upper portion of the stacking unit 15 due to the free fall and inertia of the sheet printing book 20.

When the sheet printing book 20 is non-defective, the control unit 17 closes the first stopper 13 and the second stopper 18 based on a signal from the detection unit 16, and the non-defective sheet printing book 20.
b comes into contact with the first stopper 13 or the second stopper 18 and falls into the collecting section 15 (FIG. 5).

Next, when the sheet-fed printing book 20 is defective, the control unit 17 controls the first stopper 1 based on a signal from the detection unit 16.
The third and second stoppers 18 are brought to the open position. At this time, the defective product 20a of the sheet-fed printing book 20 is
3 and below the second stopper 18 and are discharged to the outside of the accumulation unit 15 by inertia (FIG. 6).

First stopper 13 and second stopper 18
Is performed immediately after the non-defective product 20b immediately before the defective product 20a contacts the first stopper 13 or the second stopper 18.

The defective product 20a that has passed above the first stopper 13 and below the second stopper 18 is stored in a discharge receiver 22 via a pair of rollers 14a and 14b driven by the control unit 17 thereafter.

Thereafter, when there is no defective signal from the detecting section 16, the control section 17 returns the first stopper 13 and the second stopper 18 to the closed position. When the first stopper 13 and the second stopper 18 return from the open position to the closed position, the projecting cylinder 24 is simultaneously projected by the control unit 17. The protruding cylinder 24 prevents the non-defective product 20b from being discharged outward without coming into contact with the first stopper 13 and the second stopper 18 in the middle of returning to the closed position (FIG. 7).

First stopper 13 and second stopper 18
When the is returned to the closed position, the protruding cylinder 24 is also retracted at the same time (FIG. 8), but may be configured to always protrude when the first stopper 13 and the second stopper 18 are at the closed position.

According to the present embodiment, the first stopper 13
By bringing the second stopper 18 to the closed position, the non-defective product 20b of the sheet-fed printing book 20 can be reliably brought into contact with the first stopper 13 or the second stopper 18 and accumulated on the accumulation section 15. Further, when the first stopper 13 and the second stopper 18 return from the open position to the closed position, it is possible to reliably prevent the non-defective product 20b from being discharged outward by protruding the protruding cylinder 24.

[0050]

As described above, according to the present invention, good sheet-fed printing sheets come into contact with the stopper and are accumulated in the accumulation section, and defective articles are discharged to the outside of the accumulation section without coming into contact with the stopper. . For this reason, a defective sheet-fed printing book can be easily and reliably separated and extracted from a good sheet. In addition, the installation area of the entire apparatus does not increase because defective products are removed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a sheet-fed printing book rejection apparatus according to the present invention.
FIG.

FIG. 2 is a diagram showing the operation of the apparatus for extracting defective products of sheet-fed printing books according to the present invention.

FIG. 3 is a diagram showing a modified example of the defective sheet extracting apparatus for sheet-fed printing books according to the present invention.

FIG. 4 is a diagram showing another modification of the sheet-fed printing book defective product extracting apparatus according to the present invention.

FIG. 5 is a view showing the operation steps of a second embodiment of the sheet-fed book extracting apparatus according to the present invention.

FIG. 6 is a diagram showing the operation steps of a second embodiment of the sheet-fed printing book extracting apparatus according to the present invention.

FIG. 7 is a view showing the operation steps of a second embodiment of the sheet-fed printing book extracting apparatus according to the present invention.

FIG. 8 is a view showing the operation steps of a second embodiment of the sheet-fed printing book extracting apparatus according to the present invention.

FIG. 9 is a diagram illustrating a first stopper and a second stopper of the defective sheet extracting apparatus for sheet-fed printing sheets as viewed from a discharge receiving side.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 supply device 11a chain 12 suction unit 13 first stopper 14a, 14b roller 15 stacking unit 16 detection unit 17 control unit 18 second stopper 19 guide plate 20 sheet-fed book 20a defective product 20b good product 21a, 21b belt conveyor 22 discharge receiver 24 projecting cylinder

Continued on the front page (72) Inventor Mikiya Ohashi 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Inside Nippon Printing Co., Ltd. (72) Inventor Takashi Koji Takami, 1-1-chome, Ichigaya-cho, Shinjuku-ku, Tokyo No. 1 Inside Dai Nippon Printing Co., Ltd. (72) Inventor Toshihiro Sano 1-1-1 Ichigaya Kagacho, Shinjuku-ku, Tokyo F-term inside Dai Nippon Printing Co., Ltd. 3F053 EA05 EC02 ED19 LA06 LB03

Claims (8)

[Claims] 1. A supply device provided downstream of a sheet-fed printing press for continuously supplying a plurality of printed sheet-fed books, and a sheet abutting on a sheet-fed book supplied by the supply apparatus. The stacking unit includes a stacking unit provided with a stopper for stopping the leaf printing book so as to be openable and closable, a detection unit for detecting a printing state of the sheet printing book, and a control unit for controlling the stopper based on a detection signal from the detection unit. The control unit opens the stopper when a defective product signal or an operator signal is input from the detection unit and discharges the defective product of the sheet printing to the outside of the stacking unit. Good product sampling device. 2. A device for removing defective sheets from a sheet-fed printing book, comprising a feed mechanism for sending a defective sheet-fed printing sheet to the outside downstream of the stopper. 3. A sheet-fed sheet printing apparatus according to claim 2, further comprising a guide plate provided between said stopper and said feeding mechanism for guiding a defective sheet-fed printing sheet to said feeding mechanism. apparatus. 4. The apparatus according to claim 2, wherein the feed mechanism comprises a pair of rollers. 5. The apparatus according to claim 2, wherein the feed mechanism comprises a pair of belt conveyors. 6. The apparatus according to claim 1, wherein the stopper of the stacking unit has a first stopper located below the sheet-fed book supplied in the open position. . 7. The sheet removing apparatus according to claim 6, wherein the stopper of the stacking unit further includes a second stopper located above the sheet printing supplied in the open position. apparatus. 8. A protruding cylinder, which comes into contact with a sheet-fed book when the first stopper and the second stopper return from the open position to the closed position, is provided near the first stopper and the second stopper. 8. The apparatus according to claim 7, wherein the cylinder is controlled by a control unit.