JP2001261215A - Cutter for bookbinding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the conventional cutter for bookbinding which interrupts the post-process or needs the work for selecting a defective since transported printed sheets for two copies superposed in the direction of thickness are cut. SOLUTION: In this cutter for bookbinding, the printed sheets 101 transported to a cutting position P are positioned in the cutting position P, and the printed sheets 101 are cut in a designated portion by a cutting blade movable in the direction of thickness of the printed sheets 101 to finish the printed sheets 101 to a designated size. This cutter is provided with a thickness detecting means 10 for detecting the thickness of the printed sheets 101 before the printed sheets 101 are cut, and when the detection value of the thickness detecting means 10 is out of a designated range, the cutting blade is not driven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bookbinding cutting apparatus.

[0002]

2. Description of the Related Art As is well known, a bookbinding cutting apparatus positions a printing paper conveyed toward a cutting position at the cutting position, and uses a cutting blade movable in the thickness direction of the printing book. Is cut so as to finish the printed book to a predetermined size.

[0003]

In the conventional bookbinding cutting apparatus, when a two-printed book is superposed in the thickness direction and is conveyed, it is cut off. However, there is a problem that the operation is interrupted or an operation for selecting defective products is required.

An object of the present invention is to provide a bookbinding cutting apparatus which eliminates the above-mentioned problems.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is to position a print conveyed toward a trimming position at the trimming position, and to set a position in a thickness direction of the print book. In a bookbinding cutting apparatus in which a predetermined portion of the book is cut by a movable cutting blade to finish the book to a predetermined size, the thickness of the book is detected before cutting the book. Thickness detecting means is provided, and the cutting blade is not driven when the value detected by the thickness detecting means is out of a predetermined range.

The thickness detecting means is, for example, a pressing member which is movable in the thickness direction of the print book and presses the print book, and faces the print book with the holding member sandwiched in the moving direction. And an optical sensor arranged so as to detect a distance from the pressing member.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing a schematic configuration of a cutting apparatus according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of the cutting apparatus shown in FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. It is explanatory drawing of the detection method of thickness.

In FIG. 1, reference numeral 101 denotes a printing book, which is conveyed in the direction of arrow A toward a cutting position P by a conveying means (not shown). On the downstream side of the trimming position P in the transport direction, the printer 10 is arranged at intervals in the horizontal direction orthogonal to the transport direction,
There are provided four positioning mechanisms 1 for positioning the positioning mechanism 1 in the transport direction.

The positioning mechanism 1 has a positioning mechanism main body 2 movable vertically (in the direction of arrow B) and an optical sensor 3 attached to the positioning mechanism main body 2. Reference numeral 4 denotes a cord for connecting the optical sensor 3 to a control device (not shown) composed of a microcomputer. Reference numeral 5 denotes a band for fixing the cord 4 on the positioning mechanism main body 2.

As shown in FIG. 2, the positioning mechanism main body 2 comprises a prismatic base 6 and a positioning section 7 having an L-shaped cross section attached to the upper surface thereof. It is possible to take a state in which it moves and protrudes into the transport path of the printed book 101 and a state in which it is retracted below the transport path.

The positioning section 7 has an oblong through hole 7a extending in the direction of transport of the printing book 101.
a is slidably engaged with a shaft portion of a screw 8 screwed into a screw hole (not shown) extending vertically downward from the upper surface of the base 6, and by loosening the screw 8, positioning is performed. The unit 7 can be moved in a direction parallel to the transport direction of the printing book 101, and the positioning unit 7 is tightened with a screw 8.
Can be fixed.

As shown in FIG. 3, the optical sensor 3 has a detection portion 3b provided on a side surface of a tip portion of a very thin sleeve 3a, and the sensor is provided in a direction perpendicular to the axial direction of the sleeve 3a from the detection portion 3b. Light is emitted, and the detection unit 3b detects the presence of the object by receiving reflected light from the object hit by the sensor light at the detection unit 3b.

The optical sensor 3 has a positioning portion 7 such that the detecting portion 3b projects a distance D from a contact surface 7b of the positioning portion 7 with the printed book 101 and faces vertically upward.
Attached to.

Also, above the book 101 and the book 10
In the position upstream of the trailing edge in the transport direction,
Elevating unit 9 movable in the thickness direction (vertical direction) of 1
The lifting unit 9 is provided with a rectangular iron plate 10 (pressing member) extending in the horizontal direction orthogonal to the transport direction of the printing book 101 so as to face the rear end of the printing book 101 in the transport direction. Attached to.

Although not shown, the print book 101 can be moved above the cutting position P in the thickness direction of the print book 101 so as to face the rear end of the print book 101 in the conveyance direction and the both ends in the conveyance direction. A cutting blade is provided. An optical sensor 11 is attached to the cutting blade disposed so as to face the rear end of the printing book 101 in the transport direction so as to face the upper surface of the iron plate 10.
The optical sensor 11 emits sensor light vertically downward from a detection portion (not shown) provided at the lower end thereof, and receives light reflected from the upper surface of the iron plate 10. The distance from the upper surface of the iron plate 10 is detected.

Next, the operation of the cutting apparatus having the above configuration will be described. The positioning mechanism 1 is retracted below the conveyance path of the printed book 101 when cutting is not performed, and moves upward when the cutting is performed so that the positioning portion 7 protrudes into the conveyance path. The transported printing book 101 stops when the front edge 101a in the transport direction comes into contact with a portion of the contact surface 7b of each positioning portion 7 above the optical sensor 3 and is positioned in the transport direction.

Then, sensor light is emitted vertically upward from the detection portion 3b of each optical sensor 3, and the sensor light is reflected by the printed book 101 and received by the detection portion 3b. When each optical sensor 3 receives the reflected light from the book 101, the control device determines that the positioning of the book 101 is correctly performed.

The elevating unit 9 descends and the iron plate 10
Presses the upper surface of the rear end of the printing book 101 in the transport direction. Thereby, as shown in FIG. 4B, the distance d ′ between the optical sensor 11 and the upper surface of the iron plate 10 becomes larger than the distance d before descending shown in FIG. 4A. And the optical sensor 1
The sensor light is emitted toward the upper surface of the iron plate 10 from the lower end of the sensor 1, and the sensor light is reflected by the iron plate 10, is received by the optical sensor 11, and is thereby received.
1 detects a distance d ′ from the upper surface of the iron plate 10.

The control device calculates the descending distance of the iron plate 10 from the distance d 'to the iron plate 10 detected by the optical sensor 11 and the distance d stored in the memory in advance, and based on the calculated descent distance of the printing plate 101. The thickness is calculated, and if the thickness is within a predetermined range stored in a memory in advance, the cutting blade is driven to perform cutting. If the thickness is outside the predetermined range, the operator does not drive the cutting blade and informs the operator that the thickness of the printing book 101 is abnormal by using a display or a display device (not shown). When an error message is displayed, the operator removes the printed book 101 at the trimming position, and presses a reset button (not shown) to resume the operation.

[0020]

As described above, according to the present invention, thickness detecting means for detecting the thickness of a printed book before cutting the printed book is provided, and the value detected by the thickness detecting means is out of a predetermined range. In such a case, the cutting blade is not driven, so that the post-process is not interrupted, and the work of selecting defective products is not required.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a bookbinding cutting apparatus according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of the cutting apparatus of FIG.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is an explanatory diagram of a method for detecting the thickness of a printed book.

[Explanation of symbols]

 10 Iron plate (holding member) 11 Optical sensor

Claims (2)

[Claims] 1. A printing machine which is conveyed toward a cutting position is positioned at the cutting position, and a predetermined portion of the printing book is cut by a cutting blade movable in a thickness direction of the printing book. In a bookbinding cutting apparatus configured to finish a printed book to a predetermined size, a thickness detecting means for detecting the thickness of the printed book before cutting the printed book is provided, and a value detected by the thickness detecting means is set to a predetermined value. A cutting apparatus for bookbinding, wherein the cutting blade is not driven when it is out of the range. 2. The printing apparatus according to claim 1, wherein the thickness detecting unit is configured to move in a thickness direction of the printing book and to hold the printing book, and to face the printing book with the holding member sandwiched in the moving direction. 2. An optical sensor which is disposed and detects a distance from the holding member.
3. The bookbinding cutting device according to claim 1.