JPH085262B2 - Inspection device for saddle stitch bookbinding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a saddle-stitching bookbinding machine, in which a saddle-stitching signature is provided on a gathering chain of a collating portion for collating the saddle-stitching binding signature. Regarding the inspection device of the bookbinding machine for inspecting the occurrence of defective carrying and carrying in advance when carrying and carrying one by one,
The present invention relates to an apparatus for inspecting a jamming of a signature in the middle of transportation before hanging and for inspecting a normal transportation state of the signature.

(Prior Art) A saddle-stitching signature that is collated and conveyed by a saddle-stitching book and a bookbinding machine is shown in FIG. 3 in advance in the previous step (folding step after printing).
When folded in 2 or 1/4, one of the end parts of the signature on the spread side (open end part) opposite to the front end part (back side) of the fold c side is longer than the other (R) A wrap portion b is provided. The signature a is clamped by the grip 1a of the supply cylinder 1 on the back side (fold c side) from the hopper portion 4 of the saddle stitch bookbinding machine in FIG.
Until the back side (fold c side) hits the back stopper 5,
The supply cylinder 1 is conveyed while being in contact with the peripheral surface thereof. Then, at the position where it hits the back stopper 5, the grip 2a of the lap cylinder 2 grips the lap part b side of the spread side of the signature a, and then the grip 3a of the opening cylinder 3 becomes the lap part of the signature a. Hold the end on the side opposite to the side b.
At this time, the grip of the supply cylinder 1 is released (in the case of vacuum suction, the air suction operation is stopped), and is held only by the pressing roller 7 to rotate the lap cylinder 2 of the set phase rotation to the right, while Opening cylinder 3
Rotates counterclockwise to open the signature a in an inverted V shape, and immediately the jaws 2a and 3a release the signature a and hang it on the gathering chain 8 to convey it, and along the chain 8. While sequentially transporting to the lower side of the plurality of hopper units 4 and the supply cylinders 1, the wrap cylinders 2, and the opening cylinders 3 installed on the upper side in correspondence with the number of collations, on the signature a,
A plurality of signatures a of the next hopper are sequentially laid on each other to collect a plurality of sheets.

In many cases in which there occurs a malfunction in the hanging operation of the signature a that is conventionally mounted on the gathering tune as described above, the abutting position of the front end portion (fold c) of the signature a with respect to the back stopper 5 is displaced. , It is because it is not conveyed in the direction of the cathering chain in a timely manner. However, heretofore, there has been no device for inspecting such a defective conveyance operation of the signature a.

(Object of the Invention) The present invention detects a signature conveyance operation malfunction of a bookbinding machine in the operation of transporting a signature a in a hopper portion to a gathering chain, detects an abnormal position early, and places the signature on the gathering chain. The purpose is to detect the occurrence of.

(Structure of the Invention) The present invention relates to a hopper portion 4 for loading a saddle-stitching signature folded in half through at least a fold, a signature supply synrider 1 near the hopper portion, and the supply cylinder. A lap cylinder 2 is provided on the lower side, and an opening cylinder 3 is provided side by side on the horizontal side of the lap cylinder. The wrap cylinder 2 is provided on the side opposite to the front end portion of the signature folding side, which is held by the supply cylinder 1. In the saddle stitch bookbinding machine in which the signature open side end portion is held open by the rotating wrap cylinder 2 and the opening cylinder 3 and hung on the gathering chain, the signature supply cylinder 1 holds and supplies it. A signature detector 6 is provided in the vicinity of a back stopper 5 that abuts the front end of a signature on the side of a signature, and is an inspection device for a saddle stitch bookbinding machine.

(Operation of the Invention) The present invention provides a detector that detects whether or not the front end of the signature on the signature fold c (back) side of the signature supply cylinder 1 of the saddle stitch bookbinding machine is in contact with the back stopper 5. Since it is provided, when it is detected that the back part of the signature a is in contact with the back stopper, it can be determined as normal operation, and on the other hand, the signature a
When it is detected that the back stopper 5 is not in contact with the back stopper 5 and is separated from the back stopper 5, it can be judged as an abnormal operation. Therefore, the grip 1a of the supply cylinder 1 immediately causes the hopper portion 4 of the supply cylinder 1 to contact normally. Processing such as appropriately adjusting the position of the back stopper 5 with respect to the position where the signature a is held can be performed.

(Example) The device of the present invention will be described in detail according to an example. FIG. 1 is a side view of the device of the present invention. An optical sensor or the like is provided on the side of the supply cylinder 1 on the signature a carrying-in side of a back stopper 5 supported by a support such as a frame separately from the cylinder 1. The detector 6 for detecting the front end of the signature a is provided toward the circumferential surface of the cylinder 1.

FIG. 2 is a side view for explaining the operation of the device of the present invention. The signature a which is vertically stacked on the hopper 4 with the back c down is the back c side of the supply cylinder 1 gripping 1a. Can be held in. The cylinder 1 rotates counterclockwise. Immediately before or at the same time as the back portion c of the signature a comes into contact with the back stopper 5, the gripper 1a opens the signature a and immediately presses it between the pressing roller 7 and the cylinder peripheral surface while being pressed by the pressing roller 7. The signature a abuts the back portion c against the back stopper 5 while being sandwiched by. After contact, a detector 6 provided immediately before the back stopper 5 (for example, a reflection type optical sensor having a reflection mirror on the opposite cylinder 1 side,
Alternatively, a light receiving sensor is provided on the cylinder 1 side and a transmissive optical sensor having a light projecting portion facing the sensor is shielded by the signature a, and the detector 6 detects this and the back c of the signature a. Is normally contacted with the back stopper 5. The back stopper 5 is the cylinder 1.
It is attached to a support separate from and corresponds to the length from the front end (back c) of the signature a that is fed and conveyed along the circumference of the supply cylinder 1 to the end (opening side). Then, lap cylinder 2 and opening cylinder 3
The cylinder 1 can be appropriately moved in the circumferential direction so that its distal end side can be held. Further, it can be adjusted so that the grip 1a of the cylinder 1 is opened just before or at the time when the spine c of the signature a comes into contact with the stopper 5. Further, a proximity sensor 9 for timing detection is provided on the rotary shaft of any one of the supply cylinder 1, the lap cylinder 2, and the opening cylinder 3 in proximity to the peripheral surface of the rotary shaft 2b of the lap cylinder 2 in FIG. 1, for example. There is. Then, the timing sensor 9 generates a timing pulse for the supply cylinder 1, and the timing pulse is synchronized with the detection signal of the signature a by the detector 6 for inspection. And the signature a is
Within the number of limit pulses counted from the timing pulse generation time (or within the time limit by clock pulse)
If it is detected by the detector 5, the normal operation signal is output, and if it is not detected within the limited pulse number, the missing page,
If an abnormal operation signal is output as a blank, and if it is detected with a count number equal to or more than the limit pulse number, it is regarded as jamming (excess conveyance) and an abnormal operation signal is output.

When the signature a is jammed with respect to the back stopper 5, the opening cylinder 3 of the lap cylinder 2 does not clamp the lap b side (spread end) of the signature a or the gripping operation is unstable. As a result, the opening amount of the inverted V-shape becomes insufficient and the signature a cannot be hung on the gathering chain 8 on the downstream side in the transport direction. As a result, the signature is folded or folded on the gathering chain 8. The claw a is bent and caught, which causes misalignment.

The abnormal operation signal may be used as a signal for starting a display device that notifies an abnormality such as an alarm buzzer or an indicator light, or may be connected to a stop circuit of the main body of the bookbinding machine.

(Effect of the invention) Since the present invention provides the detector in the spread opening operation mechanism of the signature including the supply cylinder, the lap cylinder, and the opening cylinder immediately before the signature is placed on the gathering chain of the saddle stitch bookbinding machine, It is possible to quickly identify the machine part that causes the defective opening operation of the signature. In addition, it is possible to inspect the possibility of missing pages and misalignment at the timing before hanging on the gathering chain, and therefore, it is possible to prevent the occurrence of missing pages and misalignment on the gathering chain, and it is a bookbinding machine for saddle stitch bookbinding. Improving the efficiency of adjustment work,
It also has a remarkable effect on the improvement of bookbinding quality.

[Brief description of drawings]

FIG. 1 is a side view of the device of the present invention, FIG. 2 is a side view illustrating the operation of the device of the present invention, FIG. 3 is a perspective view of a general saddle stitching signature, and FIG. 4 is a view of a conventional device. It is a side view. 1 ... Supply cylinder, 1a ... Hold, 2 ... Lap cylinder, 2a ... Hold, 3 ... Opening cylinder,
4 ... Hopper, 5 ... Back stopper, 6 ... Detector, 7 ... Holding roller, 8 ... Gathering chain,
9 ... Timing sensor, a ... Saddle stitch signature, b ... Wrap, c ... Back

Claims (1)

[Claims] 1. A hopper portion 4 for loading a saddle-stitched signature folded at least through folds, a signature supply cylinder 1 in the vicinity of the hopper portion, and a wrap below the supply cylinder. A cylinder 2 and an opening cylinder 3 provided side by side on the horizontal side of the wrap cylinder are provided, and the signature opening side opposite to the front end of the signature folding side, which is held by the supply cylinder 1. In the saddle stitch bookbinding machine in which the end portion is held open by the rotating wrap cylinder 2 and the opening cylinder 3 and is hung on the gathering chain, the signature supply cylinder 1 holds and supplies the signature. An apparatus for inspecting a saddle stitch bookbinding machine, characterized in that a signature detector 6 is provided in the vicinity of a back stopper 5 that abuts the front end of the eye side.