JPH0812132A - Printed paper missing page detecting device in side stitching machine - Google Patents

Abstract

PURPOSE:To produce a highly reliable side stick bookbinding by reliably detecting a missing page even if printed paper is a thin material or even if a difference exists more or less in a folded shape or the like, and accurately rejecting a defective book having the missing page. CONSTITUTION:A movement in the laterally moving direction orthogonal to the transfer direction of a gathering chain 3 of printed paper S on a horizontal table 4 is detected by a photosensor 1. Printed paper supply operation in a feeder part 2 is detected in synchronism with transfer of the gathering chain 3 by a timing sensor to transmit a timing signal in the timing when the printed paper S moves in the laterally moving direction on the horizontal table 4, and a shift register is operated by synchronous detecting of a detecting signal of the photosensor and the timing signal of the timing sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat binding machine (bookbinding such as bookbinding such as bookbinding on a hard cover, a textbook, or a binding method using adhesive glue such as magazines, wire binding, sewing machine binding, etc.). In the bookbinding process using a machine, when a fed book (for example, a 4-page peller signature) is placed on the gathering chain and conveyed from the feeder section, The present invention relates to a booklet missing page detection device for a flat binding machine, which is capable of surely detecting a missing page in the case of a defective book due to blocking or folding failure.

[0002]

2. Description of the Related Art Generally, as shown in a schematic plan view of FIG. 6, a flat stitching machine is provided with a gathering chain 3 which is moved while accumulating print sheets, and a book feeding source installed along the gathering chain. Of the plurality of feeders 2 and the moving direction of the gathering chain 3 that continuously moves (the direction of the arrow)
Bookbinding and binding unit 30 installed on the downstream side in order, and the binding and binding unit 30
A defective book discharge section 31 (rejector section), a cover sheet attachment section 32, and a booklet carry-out section for unloading a good book are provided at the front stage or the rear stage of the above. A copy book S supplied one by one from the copy book group prepared for each feeder section 2 described above.
While gathering the moving gathering chain 3 and the substantially horizontal transport guide tables 4 and 4 installed on both sides of the gathering chain 3 along the shifting direction, collating a plurality of copies S of one book and collating them. While raising the printed book S in the vertical direction, it is delivered to the subsequent transport chain 6 and sent to the bookbinding section 30 for side stitching, perfect binding (glue insertion, application of adhesive glue), wire binding, sewing binding, Binding is performed in a binding format such as a thread binding binding, a cover is attached, and the bookbinding is performed.

When the copy book S is fed onto the moving gathering chain 3, as shown in the plan view of FIG. 7 and the side view of FIG. 8, a swinging motion is performed in a direction orthogonal to the moving direction of the gathering chain 3. By the swing gripper 7, the copy S of each feeder unit 2 installed along the gathering chain 3 is delivered to the gathering chain 3 one by one, and the copy S is in the transfer direction of the gathering chain 3. Laterally moving in a direction orthogonal to the above, and above the transport guide tables 4 and 4 arranged continuously on both sides along the transition direction of the gathering chain 3, and in parallel with this, for each feeder unit 2. The flat plates 5 and 5 formed by projecting are received once, and the rear end of the printing book S received by the horizontal plates 5 and 5 is then received. , And the feeding claws 3a of the gathering chain 3 which project and move from the 5th surface, and the copy book S is conveyed on the horizontal plates 5 and 5 in the same direction and at the same speed as the gathering chain 3 moves. It is moved and dropped from the tops of the horizontal plates 5 and 5 onto the gathering chain 3 and the transport guide tables 4 and 4, and a predetermined number of copies S are collated in page order.

In the conventional flat binding machine, the detection of the missing pages of the printed sheets at the time of binding the printed books is performed by gathering the printed books S on the gathering chain 3 and shifting the plurality of feeder sections 2 to each other.
Immediately before sending in the copy book S supplied one by one, as shown in FIG. 7 and FIG. 8, a swing operation is performed above the gathering chain 3 from the side orthogonal to the transport direction,
Swing gripper 7 (a vise) formed by a pair of parallel openable and closable plates that project and retract, and a sensor roll that is a roller that rotates one of the opposite sides grips the printing plate S and draws it in the side guide G direction. After that, the copy book S is released and brought into contact with the side guide G. The presence or absence of the book S is detected by detecting the distance between the opposing plates of the gripper 7 when the book S is gripped by the swing gripper 7 by a proximity switch or the like.

[0005]

As described above, the detection of the missing pages in the flat binding machine is performed by the mechanical grip operation or the nip operation by the grip detection method or the rotary nip detection method. If the book on the machine is thin, detecting the distance between the sensor plate and the sensor roll facing each other during the gripping operation with a proximity switch is likely to cause a detection error. Making it difficult.

[0006] Further, when the book S having a slight difference in folding shape or the like is temporarily supplied on the horizontal plates 5 and 5 while being laterally moved, the movement postures become uneven, and the swing grippers 7 are accurately arranged. In some cases, it was not possible to hold it, and there was a problem such as a malfunction in missing page detection.

The present invention eliminates the above-mentioned conventional drawbacks, and can accurately detect a missing page even if the printed book is thin or has a slight difference in folding shape, etc. It is intended to enable the reliable production of flat stitch bookbinding in a binding form such as side stitching, perfect stitching, wire stitching, sewing machine stitching, and stitch binding.

[0008]

According to the present invention, a lateral movement of a printing plate on a horizontal plate in a direction orthogonal to the direction of movement of a gathering chain is detected by a photo sensor and synchronized with the movement of the gathering chain. A timing sensor that sends a timing signal at the timing when the printing sheet laterally moves on the horizontal plate detects the supply operation of the printing sheet in the feeder unit, and the detection signal of the photo sensor and the timing signal of the timing sensor are synchronized. This is a booklet missing page detection device in a flat binding machine, characterized in that a shift register is operated by static detection to detect a booklet missing page.

[0009]

1 is a schematic plan view showing an essential part of the flat stitching machine A shown in FIG. 1 and a schematic side view showing an essential part of the flat stitching machine A shown in FIG. According to the embodiment shown in the following, in detail, a copy S is laterally moved from the feeder section 2 in a direction orthogonal to the transition direction of the gathering chain 3 and placed on the gathering chain 3.
Is temporarily received on the flat horizontal plates 5 and 5 formed above the gathering chain 3 so as to project in parallel therewith, and the rear end of the printing plate S received by the horizontal plate 5 is used as the feed claw 3a of the gathering chain 3. When the gathering chain 3 is engaged with the gathering chain 3, the gathering chain 3 is continuously moved to convey and move the gathering chain 3 in the same direction at the same speed as the gathering chain 3 in the lateral movement direction of the book S on the horizontal plates 5 and 5. Is detected by the photo sensor 1 provided at the laterally moving position of the printing plate, while the printing plate S is horizontally moved in synchronization with the movement of the gathering chain 3 in the feeding unit 2. The detection signal of the photo sensor 1 and the timing sensor timing signal are detected by a timing sensor that transmits a timing signal at the timing of moving in the lateral movement direction on the plates 5 and 5. And allowed operating a shift register with synchronous detection of both signals with the grayed signals, in which to carry out the missing pages detection of book blocks S.

FIG. 1 is a schematic plan view showing a main part of a flat stitching machine A in which the apparatus of the present invention is mounted, and FIG. 2 is a schematic side view showing a main part of a flat stitching machine A in which the apparatus of the present invention is mounted. And FIG.
FIG. 3 is an electric circuit diagram for driving the detection device of the first invention.

1 and 2, reference numeral 1 denotes a photosensor such as a photoelectric tube. This photosensor 1 is a gathering chain 3 in a feeder section 2 of an existing flat stitching machine A.
When supplying and collating the binding sheets S for binding,
It is for detecting whether or not the copy book S is supplied, and 2 is a feeder unit, which is a gathering chain 3
A plurality of books S are installed along the transition direction of and are for supplying the printed books S onto the gathering chain 3.

Each feeder unit 2 supplies one copy (one fold) of the copy book S in the direction of the gathering chain 3, while the swing gripper 7 is supplied from the side so as to project above the gathering chain 3. Hold the copy S. Then, the swing gripper 7 holding the copy book S moves backward to draw the copy book S toward the side guide G while moving the copy book S laterally above the gathering chain 3.

Subsequently, the swing gripper 7 releases the printing book S immediately before the side guide G so that the end of the printing book S abuts against the side guide G and each feeder section 2
The gathering chain 3 is temporarily received on the horizontal plates 5 and 5 installed on both sides in the direction orthogonal to the transfer direction. In addition, in FIG. 2, one horizontal plate 5 is supported by each feeder unit 2 side and protrudes from the gathering chain 3 side, and the other horizontal plate 5 is disposed on the side guide G side facing each feeder unit 2. It is supported and is projected on the gathering chain 3 side, and G _{1 in} FIG. 2 is
This is a notch provided in the side guide G so that the swing gripper 7 approaches in the direction of the book S.

Subsequently, as the gathering chain 3 is moved, the feed claw 3a is brought into contact with the rear end of the book S on the horizontal plate 5 to move the book S from the positions of the horizontal plates 5 and 5 to the gathering chain 3. Is transferred (moved to the right in FIG. 2) and transferred to the gathering chain 3.

The photo sensor 1 includes a feeder unit 2
To detect the presence or absence of passage of the book S due to the lateral movement in the process of being fed by the lateral movement of the gathering chain 3 in the direction orthogonal to the transition direction of the gathering chain 3 and once received on the horizontal plates 5 and 5. The horizontal direction of the gathering chain 3 of each feeder section 2 is orthogonal to the moving direction of the gathering chain 3. It is installed at a position where the book S passes by the lateral movement until it comes into contact with the side guide G by the lateral movement. In the embodiment shown in FIGS. It is installed at a lateral movement position on the horizontal plate 5 on the side. In the present invention, the invention is not limited to this as long as it can detect the lateral movement of the printing plate S, and it may be installed on one or both of the horizontal plates 5 and 5. It is possible.

The gathering chain 3 is driven and rotated by an electric motor such as a servomotor or a pulse motor, and makes a synchronous movement with the feeder unit 2, and the copy S
Is 1 copy (1 fold) by the feeding mechanism of the feeder section 2.
While moving laterally in a horizontal direction in a direction orthogonal to the transition direction of the chain 3, on the horizontal plates 5 and 5 (hereinafter referred to as the horizontal plate 5) above the chain 3 from below or from the side of the gathering chain 3 respectively. It is fed out, held by the swing gripper 6 above the horizontal plate 5 and guided in the direction of the side guide G. Then, the copy book S is released from the gripper 6 and the copy book S is attached to the side guide G.
Is placed on the horizontal plate 5 with its front end in the lateral movement direction abutting.

Subsequently, the feed claws 3a projecting from the upper surface of the horizontal plate 5 at equal intervals are engaged with the rear end of the book S placed on the horizontal plate 5 at the gathering chain 3 moving below the horizontal plate 5. Then, the copy book S is conveyed and moved to the tip side of the horizontal plate 5 in a pushed state as the feed claw 3a moves, and the gathering chain 3 below the plate 5 and the gathering chain 3 from the tip side of the horizontal plate 5 are moved.
The print sheet S ₁ sent out onto the transport guide tables 4 and 4 (hereinafter, referred to as the transport guide table 4) on both sides in the transfer direction, and sent out is slid on the transport guide table 4 while being pushed by the feed claws 3a. Feeder section 2
Is conveyed in the direction.

The photosensor 1 provided opposite to the moving position of the book S on the horizontal plate 5 moves laterally of the book S on the horizontal plate 5 at this time, that is, the book S moves above the gathering chain 3. Cross and side guide G
By the light-shielding operation by the book S caused by the lateral movement of the sheet S that comes into contact with the horizontal plate 5 and is supplied onto the horizontal plate 5,
It is detected that the copy book S at the position of 5 is once supplied onto the horizontal plate 5, and the copy book S generated by being moved on the horizontal plate 5 by the movement of the gathering chain 3 is detected. The light-blocking release operation by means is performed to detect that the copy book S once supplied on the horizontal plate 5 has been sent out from the horizontal plate 5, and detects the missing page of the copy book S.

The gathering chain 3 is equivalent to one step (one cycle operation of the feeder unit 2 in the flat stitching machine A, that is, the shifting operation of the gathering chain 3 that shifts from the front feeder unit 2 to the rear feeder unit 2). In the process of shifting, the copy book S on the horizontal plate 5 is separated from the horizontal plate 5 by the feed by the feed claws 3a, and is dropped and stacked on the gathering chain 3 and conveyed.

The photosensor 1 provided opposite to the laterally moving position of the plate S on the horizontal plate 5 is until the plate S supplied by the feeder section 2 is once received on the horizontal plate 5 by the swing gripper 7. At this time point, by detecting the movement of the book S in the horizontal movement on the horizontal plate 5, the missing page of the book S is detected.

It should be noted that the copybook S ₁ is a printbook supplied in the preceding stage loaded on the gathering chain 3 from the feeder section 2 in the preceding stage similar to the feeder section 2 by the same operation as the above operation. The copybook S ₁ is prepared by being divided into each feeder section 2 when it passes under a predetermined number of feeder sections 2 which are sequentially arranged laterally along the transfer direction of the gathering chain 3. The stacks of the supplied supply of the printed books S are received in a stacked manner and are combined into one page. In this way, the copy book S
After stacking and accumulating and collecting one page worth of pages, through the transport chain 6 and the like installed on the downstream side in the transition direction (arrow direction) of the gathering chain 3 that continuously moves,
A bookbinding unit 30 installed in order, and a defective book discharge unit 31 (rejector unit) in a front stage or a rear stage of the bookbinding unit 30.
Flat binding is performed via the cover sheet attaching unit 32 and a booklet carrying-out unit or the like (see FIG. 6) for delivering a good book to the rear stage of the cover sheet attaching unit 32. In the present invention, a thickness detector (not shown) such as a caliper for detecting the collation thickness is appropriately provided in the conveyance path before the bookbinding section 30 after collating the pages of one book. Then, it is possible to detect the number of additional pages (when more than the number of the printed sheets S is collated).

The photosensor 1 is a reflection type in the case of the embodiment shown in FIGS. 1 and 2, and is provided with a light projector and a light receiver, and the light reflection plate 1 is opposed to the photosensor 1.
a is installed on the horizontal plate 5 and reflects the light from the projector of the photo sensor 1, and the reflected light is the photo sensor 1
The light is received by the receiver. The light reflection plate 1a is formed by providing a mirror surface region on the upper surface of the horizontal plate 5 facing the photo sensor 1, and for example, the photo sensor 1
The mirror plate has a mirror-finished surface polished on the upper surface of the horizontal plate 5 facing the plate, a mirror-finished aluminum foil may be attached, or metal vapor deposition may be performed. In addition to this, it is possible to use the transmissive photosensor 1 in which the light projector and the light receiver are arranged to face each other.

When the printing plate S of the feeder unit 2 is clamped by the swing gripper 7 and moves laterally on the horizontal plate 5, the printing plate S projects light from the projector of the photosensor 1 onto the light reflection plate 1a. The shielded band of the photo sensor 1 is formed by blocking the generated light.

On the other hand, when the print S of the feeder unit 2 is not held by the swing gripper 7 or when there is no lateral movement of the print S on the horizontal plate 5 due to some trouble, the print S depends on the print S. The light-shielding operation does not occur, so that the light projector 1a of the photosensor 1 is connected to the light reflector 1a.
The light receiver of the photo sensor 1 receives the reflected light that is projected and reflected by the photo sensor 1, and the light receiving band of the photo sensor 1 is formed.

FIG. 3 is an electric circuit diagram of the missing page detecting device in the flat binding machine according to the present invention, in which n feeder parts 2 are installed along the moving direction of the gathering chain 3.
2, 2, ..., So-called gathering chain 3 in the transition direction (printing sheet conveying direction), the first feeder section F ₁ on the upstream side to the n-th feeder section F on the final feeder section on the downstream side (bookbinding binding section 30 side). FIG. 3 is an electric circuit diagram for detecting a missing page in the kth feeder section, which uses the AC voltage of AC 100V or 200V arranged at the kth (k = 1 to n) of the _nth power supply, and SW ₁ is a power switch ( Main switch).

In the k-th feeder section 2 of the feeder section 2, a photo sensor 1 which uses a DC voltage obtained by converting an AC voltage of AC 100 V or 200 V as a power source into a DC power source (the photo sensor 1 of the k-th feeder section in FIG. k)) and a photo sensor relay 10 (k-th feeder section 2 in the figure) that operates by the light detection of the photo sensor 1.
Of the photo sensor relay 10 (k)), and the normally open contact 10a of the relay 10 (illustrated as the normally open contact 10 (k) a of the kth feeder section 2 in the figure) is
A timing sensor 8 (mechanical or optical proximity switch or rotary encoder or the like, which is installed in the feeder unit 2 (each feeder unit) and rotates in synchronism with the operation of the feeder unit 2 and a micro switch, is used as a timing sensor 8 The timing sensor 8 (k) of the feeder section 2) and the missing page detection relay 9 installed in each feeder section 2
(In the figure, it is shown as a missing page detection relay 9 (k) of the k-th feeder section 2).

In FIG. 3, the timing sensor 8 is shown.
(k) The (timing sensor 8) is attached in proximity to the drive rotation unit of the k-th feeder unit 2 of the flat binding machine A,
One timing signal is transmitted for each cycle operation of the feeder unit 2 (k) (feeder unit 2) (every time the gathering chain 3 moves between the preceding feeder unit 2 and the next succeeding feeder unit 2).

The timing sensor 8 (k) is used for the copy sheet S.
Is held by the swing gripper 7 and is set to perform a closing / closing operation at the timing of the horizontal movement while moving horizontally on the horizontal plate 5.

In the light-shielding band of the photosensor 1 when the print S is held by the swing gripper 7 and laterally moves on the horizontal plate 5, a photocurrent (detection signal) is applied to the photosensor 1 (k). Does not flow, the photosensor relay 10 (k) does not operate through an amplifier (not shown), the normally open contact 10 (k) a of the relay 10 (k) is turned off, and at the same time, the timing sensor 8 ( Even if k) is closed, the missing page detection relay 9 (k) does not work.

On the other hand, the copy book S is not held by the swing gripper 7, for example, and the copy book S is placed on the horizontal plate 5.
In the light receiving band of the photosensor 1 (k) when there is no lateral movement of the photosensor 1 (k), a photocurrent (detection signal) flows through the photosensor 1 (k), and the photosensor relay 10 passes through an amplifier (not shown). (k) operates, the normally open contact 10 (k) a of the relay 10 (k) is turned on (closed), and at the same time, when the timing sensor 8 (k) is closed / closed, the missing page detection relay 9
(k) operates, the normally open contact 9 (k) a of the relay 9 (k) is
Each is turned on (closed) and detects a missing page.

It should be noted that the relay 13 (k) operated by the above-mentioned missing page detection relay normally open contact 9a and the normally open contact 13 (k) a for self-maintaining the operation of the relay 13 (k).
The self-holding normally open contact 13 (k) a activates an alarm device 24 such as an alarm lamp or a buzzer to display an alarm, and the manual reset switch 13 (k) b releases the alarm display. As an automatic reset switch,
A reject relay 15 (n, which will be described later, is connected in series with the alarm device 24.
The + x) normally open contact 15 (n + x) a may be connected.

The normally open contact 9 (k) a of the above-mentioned missing page detection relay 9 (k) which is turned on by the missing page detection is the shift register 1
A mechanical proximity switch including a micro switch and a cam that inputs a shift operation start signal to the signal input terminal side of 2 and is installed in the main body of the flat stitching machine A and rotates in synchronization with the operation of the flat stitching machine A. , Or the main timing sensor 14 (or the timing sensor 8 (k) of each feeder unit 2) which is transmitted by the closing / closing operation (timing detecting operation) of the main body of the flat-binding machine A for each cycle operation by an optical proximity switch or a rotary encoder. ) Is input to the signal input terminal side of the shift register 12, and each time the timing signal is input, one from the k-th to n-th signal output terminal side of the shift register 12 in order. The shift operation is performed and the operation signal is output.
The k-th feeder section to the n-th feeder connected to the respective output terminals
Shift relays 15 (k) to 1 up to the feeder
5 (n) are operated one by one, and the normally-closed contacts 15 (k) b to 15 (n) b of the relays are turned off (opened) one by one, respectively, and the k-th feeder section to the n-th feeder are respectively operated. The feeder air valves 17 (k) to 17 (n) up to the feeder section are sequentially closed one by one by a shift operation to stop the suction air of the book S.

The shift relay 15 (k) of the k-th feeder section (the feeder section in which a missing page has occurred) whose normally open contact 9 (k) a is turned on by detecting a missing page has a machine stop relay 20 to be described later. Since the normally open contacts 20a of are connected in series, the shift relay 15 (k) is
It operates only when the machine stop instruction is generated and the normally open contact 20a is turned on (closed).

As described above, the shift register 12 performs a shift operation for each timing signal transmitted from the input timing sensor 14 to output a plurality of output terminals (k to n to (n + x)) of the shift register 12. Than 1
Output signals are sequentially generated while shifting to each output terminal, and relays 15 (k) to each output terminal are connected to each feeder unit 2 so as to correspond to the order of each feeder unit 2.
15 (n) is operated, the normally closed contact 15 (k) b of the relay is turned off (opened), and the air suction operation after the feeder section (kth feeder section) where a missing page has occurred is sequentially shifted. The supply operation of the copy book S of the feeder unit 2 is stopped.

Further, the shift register 12 shifts each time a timing signal is input as described above, and the number of input timing signals from the main timing sensor 14 is such that the feeder section 2 in which a missing page has occurred is missing. When the predetermined number of cycles (n + x) during the transition of the copy S from the to the rejector 31 is reached, an output signal is generated from the output terminal of the shift register 12 and the shift relay 15 (n + x) (Reject relay)
And the normally open contact 15 (n + x) a of the relay is turned on (closed), the reject operation valve 16
When the booklet S, which is moved by the gathering chain 3 from the feeder unit 2 in which a missing page has occurred to the rejector unit 31, arrives, the rejector unit 31 is operated in the discharge direction by the operation of the reject operation valve 16. , As a defective book (collated book with missing pages).

Further, in the detection circuit of the device of the present invention shown in FIG. 3, a preset counter 19 (k) and a normally open contact 9 (k) a of the missing page detection relay 9 (k) are provided in series, The preset counter 19 (k) counts the number of opening / closing operations of the open contact 9 (k) a (number of missing pages detected), and when the preset number is reached, the machine stop relay 20 is operated and the relay 20 is normally closed. By turning off (opening) the contact 20b, the drive motor 21 of the main body of the flat-binding machine A is stopped (machine stopped) to stop the operation of the machine, and the feeder section 2 with missing pages is adjusted and repaired. And
When the number of missing pages continues to occur by a preset number in one feeder unit 2, the machine is stopped.
SW ₂ is an operation on / off switch when the preset counter 19 (k) is used.

To restart the flat stitching machine A after it is stopped, the reset switch 11 (normally closed switch) is manually turned off (opened) to turn off the machine stop relay 20.
The normally closed contact 20b is turned on (closed contact) and the reset switch 23 (normally opened contact) is turned on (closed contact) to operate the machine start relay 22 and connected in series to the normally closed contact 20b. The normally-open contact 22a is turned on (closed) to start the drive motor 21 and restart the main body of the flat stitching machine A. An inching switch SW ₃ is provided in parallel with the normally open contact 22a for starting the drive motor 22.

FIG. 4 shows each of the first feeders 2 (1), which are arranged in order from the upstream side in the transition direction of the gathering chain 3.
It is a block diagram of the missing page detection system in the 2nd feeder section 2 (2), ... The n-1th feeder section 2 (n-1), the nth feeder section (n). In the figure, 1 (1) to 1 (n) indicate photosensors installed in each feeder unit 2, and 8 (1) to 8 (1)
(n) indicates a timing sensor installed in each feeder unit 2, 9 (1) to 9 (n) indicates a missing page detection relay installed in each feeder unit 2, 10 (1) to 10 (n) Is a photo sensor relay installed in each feeder unit 2, 12 (1) to 12 (n) is a shift register installed in each feeder unit 2, and 14 is a timing sensor of the main body of the flat stitching machine A. , 15 (1) to 15 (n) are shift relays installed in each feeder unit 2, and 16 is a valve for operating the radiator (operating magnet).
Reference numerals 7 (1) to 17 (n) denote feeder valves for supplying feeder air for supplying the prints installed in each feeder unit 2 by air suction, and 19 (1) to 19 (n)
Indicates a preset counter, 21 indicates a drive motor of the main body of the flat-stitching machine A, and 31 indicates a rejector section operated by the rejector operation valve 16.

FIG. 5 is a timing chart in the missing page detecting operation of the missing page detecting device in the flat binding machine of the present invention (the horizontal axis represents time t, and the vertical axis represents the signal amount). The copy book S is moved by the swing gripper 7 to the respective feeder units 2 (1 to 1).
n) is supplied above the gathering chain 3,
When the horizontal plates 5 are laterally moved in a direction orthogonal to the transfer direction of the gathering chain 3 and are supplied onto the respective horizontal plates 5 and there is no missing page in any of the feeder units 2, the printing plate The photo sensor 1 is shielded by S, the reflected light from the opposing reflection plate 1a is not detected, the detection signal Ps by the photo sensor 1 is not generated, and the timing sensor 8 is synchronized with the shielded time period. The (timing sensor 8 (k) of the k-th feeder section 2 (k)) is turned on (closed) for each cycle supply operation of the feeder section 2 under the related drive to generate the timing signal Ts. . As described above, the detection signal P
When s and the timing signal Ts do not occur at the same time,
The missing page detection relays 9 (from the missing page detection relay 9 (1) of the first feeder section to the missing page detection relay 9 (n) of the nth feeder section) of all feeder units 2 do not operate, and the missing page detection signal W
s does not occur.

On the other hand, the print S is horizontally moved by the swing gripper 7 from the respective feeder units 2 (1 to n) on the horizontal plate 5 in the direction orthogonal to the transfer direction of the gathering chain 3. When there is no lateral movement of the book S on the horizontal plate 5 at the timing when it should be supplied onto the plate 5, the photosensor 1 is not shielded by the book S and the opposing reflector 1
By detecting the reflected light from a, a photodetection signal Ps is generated in the photosensor 1, and the timing sensor 8 (timing sensor 8 of the kth feeder unit 2 (k)) is synchronized with the time zone to be shielded. (k)) is turned on (closed) via the amplifier for each one-cycle supply operation of the feeder section 2 under the related drive to generate the timing signal Ts. As described above, the detection signal Ps and the timing signal Ts
If both occur at the same time, the missing page detection relay 9 (for example, the kth feeder section 2) of the feeder section 2 in which the missing page has occurred.
The missing page detection relay 9 (k) of (k) operates to generate an missing page detection signal Ws.

In the detection timing chart shown in FIG. 5, the timing signal Ts from the timing sensor 8 indicates that the swing gripper 7 is moving laterally of the print S when the print S is supplied from the feeder unit 2 onto the horizontal plate 5. However, it is appropriate to generate it at a timing immediately before or after the copy book S contacts the side guide G. The timing signal Ts is generated in the time zone shown by the solid line or shown by the solid line and the dotted line.

[0042]

The function of detecting the missing pages of the book in the flat binding machine of the present invention is as follows.
The horizontal movement of the book S on the horizontal plate 5
The photo sensor 1 provided at the side of the horizontal movement position of the printing plate detects the movement of the gathering chain 3, and the feeding operation of the printing plate in the feeder unit 2 is performed by the printing plate S on the horizontal table in the horizontal movement direction. Is detected by the timing sensor 8 that transmits a timing signal at the timing of moving to the shift register 13, and the shift register 13 is operated by the synchronous detection of both the detection signal Ps of the photo sensor 1 and the timing signal Ts of the timing sensor 8. At the very least, it is designed to detect the missing pages of the printed book. Since this is a method of optically detecting the timing of the printed book S moving laterally on the horizontal plate 5 and coming into contact with the side guide G, It is possible to accurately detect whether or not the copy book S is supplied onto the horizontal plate 5.

[0043]

The apparatus for detecting a missing page in the flat binding machine of the present invention is different from the conventional missing page detection performed by the mechanical gripping operation and the nip operation, and the printing book is thin,
Even if there is a slight difference in the folding shape, there is no detection error, and it is possible to accurately and easily detect the missing pages in the flat binding machine, and there is a slight difference in the folding shape. Even if the printed book is fed by a horizontal movement on a horizontal plate in a state where it cannot be held between the swing grippers accurately, it is a method that optically detects the timing during the horizontal movement. Accurate detection can reduce the occurrence of malfunctions in missing page detection, and defective books with missing pages
It has the effect of accurately rejecting and producing highly reliable flat stitch bookbinding.

[Brief description of drawings]

FIG. 1 is a plan view of a booklet missing page detecting device in a flat binding machine according to the present invention.

FIG. 2 is a side view of the missing page detection device in the flat binding machine of the present invention.

FIG. 3 is an electrical circuit diagram of a missing page detection system of the kth feeder section of the missing page detecting device in the flat binding machine of the present invention.

FIG. 4 is an electric circuit diagram of a booklet missing page detection system from the first feeder section to the nth feeder section of the booklet missing page detection device in the flat binding machine of the present invention.

FIG. 5 is a timing chart showing a missing page detecting operation of the booklet missing page detecting device in the flat binding machine of the present invention.

FIG. 6 is a schematic plan view of a general flat stitching machine.

FIG. 7 is a partial plan view of a general flat stitching machine.

FIG. 8 is a partial side view of a general flat stitching machine.

[Explanation of symbols]

SW ₁ … Main switch SW ₂ … Preset counter ON / OFF switch SW ₃ … Inching switch 1,1 (k) ～ 1 (n)… Photo sensor 1a… Reflector 2,2 (1) ～ 2 (n)… Feeder Part 3 ... Gathering chain 3a ... Feeding claw 4 ... Transport guide table 5 ... Horizontal plate 6 ... Transport chain 7 ... Swing gripper 8 (1), 8 (k) to 8 (n) ... Timing sensor 9 (1), 9 ( k) to 9 (n) ... Missing page detection relays 10 (1), 10 (k) to 10 (n) ... Photo sensor relay 11 ... Machine start reset switch 12 (1), 12 (k) to 12 (n) ... Shift register 13 (k) ... Holding relay 14 ... Main timing sensor 15 (1), 15 (k) to 15 (n) ... Shift relay 16 ...
Rejector operation valve 17 (1), 17 (k) ~ 17 (n) ... Feeder valve 19 (1), 19 (k) ~ 19 (n) ... Preset counter 20 ... Machine stop relay 21 ... Drive motor 22 ... Machine start Relay 23 ... Machine start switch 24 ... Alarm device 30 ... Binding binding part 31 ... Rejector part 32 ... Cover attachment part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Kuranami 1-18-4 Shimura, Itabashi-ku, Tokyo Toppan Techno Co., Ltd. (72) Inventor Makoto Shimomura 1-18-4 Shimura, Itabashi-ku, Tokyo Stock Company Toppan Techno (72) Inventor Yoshiyuki Ito 1-5-1 Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd.

Claims (1)

[Claims] 1. A photo sensor detects a lateral movement of a print on a horizontal plate in a direction orthogonal to a transfer direction of a gathering chain by a photo sensor, and a print supply operation in a feeder unit synchronized with the transfer of the gathering chain. Is detected by a timing sensor that transmits a timing signal at the timing when the copybook laterally moves on the horizontal plate, and the shift register is operated by the synchronous detection of the detection signal of the photosensor and the timing signal of the timing sensor. An apparatus for detecting a missing page in a flat binding machine, which is configured to detect a missing page in a book.