JPH10244508A - Method and apparatus for detecting saddle binding fault book - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance an accuracy of discovering a fault book by photographing a front surface of a saddle binding needle by a camera, and detecting a photographed image deviated from a reference image by a predetermined range as a saddle binding fault. SOLUTION: A camera 32 for photographing a hit saddle binding needle 24 is mounted at a downstream position of a saddle binding machine 22 in a feeding direction. The camera 32 is set to a center in a transfer unit 16 in the state that a lens is directed upward, and the needle 24 of a saddle binding book 10 transferred across the unit 16 is photographed from a front surface (below). As the camera 32, a digital still camera or a video camera for decomposing a photographed image into pixels and processing it by a computer is used. To photograph only at a moment of passing the book 10, it is necessary to switch a shutter. In this case, passage of the book 10 is detected by a sensor, and the shutter may be automatically opened by an automatic shutter. Or, a continuously photographing camera may be adopted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and an apparatus for detecting a saddle stitch book.

[0002]

2. Description of the Related Art Thin magazines and the like often have saddle stitches bound with saddle stitches (staples). FIG. 6 is a cross-sectional view of a book showing this state, in which a saddle stitching needle b is driven into the center of the overlapped pieces a for binding. In this case, if the saddle stitching needle b is not properly driven, the front side (the tip side)
Opens (for example, in the state of the dashed line), and when this part is touched with a hand, etc., it is injured. Recently, the PL method tends to strictly hold the responsibility for this.

[0003]

For this reason, various methods and apparatuses for detecting a saddle stitching defect have been proposed, but all have problems in their accuracy. The most common type is the contact type, in which the sensor is used to touch the saddle stitching needle. The accuracy is poor. It is said that the rate of finding true defective products by this method is at most about 20%. The present invention has been made to solve such a problem, and it is an object of the present invention to improve the accuracy of finding a defective product by judging good or bad saddle stitches from an image.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a saddle stitching process in which a driven saddle stitch is transported in a state where the driven stylus is visible. Provided is a method for detecting a saddle stitching defect, wherein a photographed image is detected as a saddle stitch defect when the photographed image deviates from the reference image by a predetermined range.

Further, the present invention relates to a saddle stitching machine for driving a saddle stitching needle into a saddle stitching apparatus in which the saddle stitching driven from above is transferred to a transfer unit in a horse riding state while being visible from below. At the downstream position in the transfer direction, a camera is installed below the transfer unit to take a picture of the saddle stitching needle from the front, and an image processing for sending the taken image to the control device and comparing it with the reference image is performed. A saddle-stitch-defective book detecting device that detects a stitch-defective booklet having a deviation from the predetermined range.

Further, according to the present invention, in the above-described apparatus, the saddle stitching defect is sent as a failure signal to an eliminator provided on the carry-out line, and the eliminator is operated to remove the saddle-stitching defective book from the carry-out line. The present invention provides a saddle-stitching book detecting device characterized by the following.

[0007] By taking the above means, that is, by photographing the saddle stitches with a camera, the present invention can three-dimensionally catch the quality of the driven state, so that the accuracy of finding the defective state is high. According to this method, it is expected that the detection rate of defective books can be increased to about 80%.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a partial front view of the saddle stitching apparatus, and FIG. 4 is a cross-sectional view. The saddle stitch book 10 is transferred by a transfer unit 12 that moves continuously. This transfer unit 12
Is composed of an inverted V-shaped transfer body 16 having an open top for mounting the saddle stitch book 10 in a horse riding state, and a pushing body 18 attached to the rear end of the transfer body 16 and pushing the saddle stitch book 10. Both the transfer body 16 and the pushing body 18 are attached to a chain 20 that rotates endlessly, so that a predetermined number of transfer units 12 are provided.
Is configured.

Although not shown, each station on the upstream side of the transfer line in the transfer direction is provided with a predetermined number of piece feeders called saddles at intervals of the transfer unit 12. Each piece constituting the saddle stitch book 10 is set on each saddle, and when the transfer unit 12 arrives, each piece falls on the saddle. Therefore, each piece is piled up toward the downstream side of the transfer line, and reaches a predetermined number.

In the middle of the transfer line, a saddle stitcher (stapler) 22 is provided. The saddle stitching machine 22 is for driving a saddle stitching needle 24 into the saddle stitch book 10 from above, and includes a saddle stitching needle driving machine 26 provided above and a base plate 28 provided below. Be composed.

In this case, the saddle stitching machine 26 and the base plate 28 are both moved synchronously with the transfer unit 12 for a fixed length, and the stitching needle 24 is driven during this time. Specifically, both the saddle stitching machine 26 and the base plate 28 reciprocate in the direction of the transfer line.
2 to pick up, return in synchronization with this, and pick up the next transfer unit 12 again.

When the center stitch needle 24 is driven, the base plate 28 floats and supports the center stitch needle 24 from below. The floating of the base plate 28 also needs to be synchronized with the transfer line 12, such as by a mechanical method such as a cam or a crank,
There are various types such as those using an actuator 30 such as an electromagnetic air cylinder or a solenoid with good responsiveness shown in this example.

A camera 32 is mounted at a position downstream of the saddle stitching machine 22 in the transfer direction to photograph the hammered needle 24. FIG. 1 is a cross-sectional view of the transfer unit 12 showing the installation state of the camera 32. The camera 32 is set in the center of the inside of the transfer body 16 with the lens facing upward, and the transfer body 1 is set.
The saddle stitching needle 24 transported across the center 6 is photographed from the front (lower) of the saddle stitching needle 24.

As the camera 32, a digital still camera or a video camera capable of decomposing a captured image into pixels and processing the image by a computer is used. It is necessary to open and close the shutter to shoot only the moment the saddle stitch book 10 passes,
In this case, an automatic shutter that detects the passage of the saddle stitch book 10 with a sensor and opens the shutter may be used. It should be noted that the image may be taken continuously.

FIG. 2 is a flowchart of the image processing. An image taken by the camera 32 is taken into a computer and compared with a reference image stored in advance to determine how much the photographed image deviates from the reference image. calculate.
If the deviation exceeds the allowable range, it is determined that the saddle stitching is defective. When it is determined that the saddle stitching is defective, a warning to that effect is issued as appropriate. In this example, the signal is sent to a later-described eliminator.

The saddle stitch book 10 on which the saddle stitching needle 24 has been photographed is carried out of the transfer line. There are various ways to carry this out.
FIG. 2 is a cross-sectional view of the saddle stitching apparatus showing an example of this. The unloading in this example is performed by a push-up rod 34 that pushes up the saddle stitch book 10 from below the transfer body 16. Above the push-up bar 34, two rollers 38, 40 having a take-out belt 36 wound on one side are provided, and the saddle-stitched book 10 pushed up by the push-up bar 34 is held by the rollers 38, 40 to carry out the carry-out belt 3.
It is carried out at 6.

In this case, if the saddle stitch is defective, the removing machine 4
2 discharges from a reject line different from the regular carry-out line. There are various types of the eliminator 42. For example, an elimination belt 44 whose tip can enter the discharge belt 36 may be provided above the discharge belt 36. When the above-mentioned failure signal is issued, the actuator 46 is operated to lower the elimination belt 44 and pick up a book with a saddle stitching failure.

[0018]

As described above, according to the present invention, the driving state of the saddle stitch is photographed by the camera. Therefore, the photographed image reflects not only the vertical and horizontal directions but also the deviation in the front-rear direction. Can be performed with extremely high precision.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a saddle stitching apparatus showing an example of the present invention.

FIG. 2 is a flowchart of image processing showing an example of the present invention.

FIG. 3 is a partial cross-sectional front view of the saddle stitching apparatus showing an example of the present invention.

FIG. 4 is a cross-sectional view of the saddle stitching apparatus showing an example of the present invention.

FIG. 5 is a side view of a discharge device showing an example of the present invention.

FIG. 6 is a cross-sectional view of a book showing a state in which a saddle stitch is driven.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Saddle stitch book 12 Transfer unit 22 Saddle stitching machine 24 Saddle stitching needle 32 Camera 42 Elimination machine

Claims (3)

[Claims] In a saddle-stitching process of a saddle-stitch book that is being transported while the driven-in saddle stitch is visible, a front surface of the saddle stitch is photographed by a camera, and a photographed image is shifted from a reference image by a predetermined range. A method for detecting a saddle stitching book, comprising detecting a booklet as a saddle stitching defect. 2. A saddle stitching apparatus in which a saddle stitched in from above is transported in a horse riding state to a transfer unit in a state where it can be seen from below, in a transport direction downstream of a saddle stitching machine into which the saddle stitch is driven. At the position, a camera is installed below the transfer unit and the saddle stitching needle is photographed from the front, and the photographed image is sent to the control device to perform image processing for comparison with the reference image,
An apparatus for detecting a saddle stitching defect, wherein an image whose photographed image deviates from a reference image by a predetermined range is detected as a saddle stitching defect. 3. The bookbinding apparatus according to claim 2, wherein the saddle stitching defect is sent as a failure signal to an eliminator provided in the carry-out line, and the eliminator is operated to remove the saddle-stitching defective book from the carry-out line. Saddle stitch book detection device.