JP2016147358A - Cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which an accident such as finger pinch during clamp work occurs because a safety measure is not provided in a clamp mechanism of a cutting machine in a conventional printing factory.SOLUTION: A cutting machine 1 comprises: a placing table 2 for placing sheets thereon; a clamp mechanism 5 provided on the placing table 2 and having a pressing member 5A for clamping the sheets at a cutting position; a cutting mechanism 4 for cutting the sheets clamped by the clamp mechanism 5; a sensor 5a provided in the pressing member 5A of the clamp mechanism 5 for detecting presence of a foreign object at the cutting position of the sheets; and a control unit 6 for controlling the clamp mechanism 5 so that the pressing member 5A performs opposite operation from clamp operation before the pressing member 5A comes into contact with the foreign object when the sensor 5a has detected the presence of the foreign object.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cutting machine that is operated by an operator in a printing factory and clamps a stacked sheet, which is an object to be cut, by a clamp mechanism, and then cuts the finger of the operator by the clamp mechanism. It is related with the technique which prevents that it comes out.

  For example, a cutting machine as shown in Patent Document 1 is provided with a cutting mechanism having a blade for cutting laminated paper as a material to be cut, and fixing the material to be cut at a cutting position prior to cutting with this blade ( A clamping mechanism for clamping) is provided.

  In a printing factory, the above-described cutting machine exists as one of the other equipment of the printing machine. A cutting machine in a printing factory is provided in the middle of an equipment line that cuts a printed sheet into a predetermined size and sends it to a bookbinding process, for example.

  Since the cutting machine in the printing factory has various paper orders, the operator moves the stacked paper placed on the mounting table in the cutting machine to the cutting position on the mounting table and clamps it. The operation is performed such that the mechanism is operated and clamped, and then the cutting machine is operated to perform cutting.

  As described above, the cutting machine in the printing factory is accompanied by an operation by an operator. Therefore, regarding the operation of the blade, a safety mechanism is installed such that the blade does not operate when a paper other than the paper is inserted into the cutting position.

  However, although any cutting machine in a conventional printing factory has safety measures for the operation of the blade as described above, no safety measures for the operation of the clamp mechanism have been provided, so the fingers are clamped during clamping. There was sometimes.

  That is, since the cutting machine operates the clamp mechanism prior to the operation of the blade, the finger cannot be clamped together with the paper when the blade is operated, and the blade is operated with the finger clamped. Therefore, there is no accident that damages the finger with the blade, and most of the accidents in the cutting machine are that the finger is caught in the clamp mechanism.

JP 2002-326185 A

  The problem to be solved by the present invention is that a conventional cutting machine in a printing factory does not have a safety measure in a clamp mechanism, and thus an accident occurs in which a finger is caught during a clamping operation.

  The present invention provides a mounting table for mounting paper, a clamp mechanism provided on the mounting table and having a pressing member for clamping the paper at a cutting position, and a cutting mechanism for cutting the paper clamped by the clamping mechanism. A sensor provided on the presser member of the clamp mechanism for detecting the presence of foreign matter at the cutting position of the paper, and the presser member when the presence of the foreign matter is detected by the sensor. The main feature is that a control unit that controls the clamping mechanism is provided so as to perform the operation opposite to the clamping operation of the pressing member before the contact.

  In the present invention, when there is a foreign matter other than the paper to be cut at the cutting position, the sensor detects this, and before the control unit comes into contact with the foreign matter by the detection of the foreign matter of the sensor, the holding member Therefore, even if the clamp mechanism is operated while the fingers are still in the cutting position, the presser member is separated from the fingers before it touches the fingers, and the fingers are pinched. There will be no inconvenience.

FIG. 1 is a perspective view showing an outline of a main part of a cutting machine according to the present invention. 2A is a view as viewed from an arrow A in FIG. 1, and FIG. 2B is a view as viewed from an arrow B in FIG. 3A is a front view, FIG. 3B is a rear view, FIG. 3C is a bottom view, and FIG. 3D is a cross-sectional view taken along the line CC in FIG. e) is a sectional view taken along line DD. FIG. 4 is a block diagram showing an outline of the main part of the cutting machine of the present invention. FIG. 5 is a control flowchart of the clamping mechanism in the cutting machine of the present invention. 6A and 6B show the operation of the clamping mechanism in the cutting machine of the present invention, where FIG. 6A shows a state where there is no foreign matter, and FIG. 6B shows a state where there is a foreign matter.

  The present invention relates to a problem that the operator's fingers are pinched by the clamp mechanism to cause injury in a cutting machine that is operated by an operator in a printing factory. When the presence of a foreign object is detected by this sensor, the clamping unit performs an operation opposite to the clamping operation before the pressing member comes into contact with the foreign object. The mechanism was controlled.

  Further, according to the present invention, in the above-described configuration, a plurality of sensors are provided at different positions of the pressing member, and the control unit determines whether the foreign object and the paper are wavy or wrinkled based on a combination condition of detection results of these sensors. Also good.

  Specific examples of the present invention will be described below with reference to FIGS. 1 to 6, the detailed configuration of the cutting machine is omitted, and only the main part of the present invention is schematically shown. There are many types of the cutting machine 1 shown in this example, but the type shown in FIG. 1 in which the operator performs clamping and cutting of a sheet by the operator is an object of the present invention.

  The cutting machine 1 has a paper insertion opening 2A penetrating in the front-rear direction at a predetermined height position of a main body 2 (imaginary line: indicated by a two-dot chain line), and the front and rear sides of the main body 2 of the paper insertion opening 2A. A mounting table 3 for mounting paper is provided.

  Hereinafter, in the main body, the front side means a side on which a paper is placed and inserted into the paper insertion slot 2A, and the rear side means a side opposite to the front side in the main body 2. The mounting table 3 extends from the paper insertion opening 2 </ b> A to the rear side of the main body 2.

  Inside the main body 2, a cutting mechanism 4 and a clamping mechanism 5 are provided above the mounting table 3 at a midway position in the front-rear direction of the sheet insertion opening 2 </ b> A. The cutting mechanism 4 has a lifting mechanism (not shown) for lifting and lowering the blade 4A provided across the width of the main body 2 (meaning a horizontal direction with respect to the front and rear).

  The clamp mechanism 5 has a lifting mechanism (not shown) for lifting and lowering the pressing member 5A provided close to the rear side of the blade 4A of the cutting mechanism 4. The elevating mechanisms of the cutting mechanism 4 and the clamp mechanism 5 are controlled by the control unit 6 so as to be elevable independently of each other.

  That is, as shown in FIG. 4, the control unit 6 is connected to the cutting mechanism 4 (elevating mechanism, hereinafter abbreviated) and the clamp mechanism 5 (elevating mechanism, abbreviated below) and the front end surface of the mounting table 3. The cutting mechanism operation switch 6A that operates the cutting mechanism 4 by operating with both hands at the same time, and a step further below the height at which the mounting table 3 is located on the front surface of the main body 2, that is, a step on the installation site of the main body 2 A pedal type clamp mechanism operation switch 6B is connected.

  In addition, the control units 6 are provided at both ends in the width direction of the entrance for inserting the paper in the paper insertion port 2A of the main body 2, and are safety for controlling the cutting mechanism 4 that detects whether or not the paper is present on the mounting table 3. A sensor 4a, a foreign object sensor 5a for detecting, for example, a finger when a foreign substance to be described later is present as a foreign substance at a cutting position (a position where the blade 4A is lowered in the paper insertion slot 2A), and a foreign substance sensor 5a in this example Is connected to a paper sensor 5b that detects paper waviness or wrinkles.

  The cutter 1 according to the present invention is characterized in that when the clamp mechanism 5 clamps a sheet, when a finger is present as a foreign object, for example, the clamp operation is reversed from the clamp operation so as not to clamp the finger.

  As shown in FIGS. 2 and 3, the clamp mechanism 5 has a comb-like shape in which the front side is flat and the rear side is spaced apart from the flat part in this example, and the lower end of the holding member 5A. A foreign matter sensor 5a and a paper sensor 5b are provided in pairs at both ends in the width direction at positions below the respective positions by a predetermined dimension (foreign matter sensors 5a, 5a and paper sensors 5b, 5b).

  The foreign matter sensor 5a and the paper sensor 5b are both photoelectric sensors. One of the foreign matter sensors 5a and 5a, one of the paper sensors 5b and 5b is on the light emission side, the other of the foreign matter sensors 5a and 5a, and the other of the paper sensors 5b and 5b. Is the light-receiving side, and enters the detection state when light reception is blocked.

  The foreign matter sensor 5a is provided at the front end of the pressing member 5A, and is provided at a position about 3 to 7 mm below the lower end position of the pressing member 5A. If the position is higher than 3 mm, the presser member 5A may come into contact with the foreign object (finger) at the time lag from the detection of the foreign object sensor 5a until the clamping operation is actually reversed. There is a possibility that a paper wave or the like cannot be detected well in the condition setting with the paper sensor 5b described later.

  The sheet sensor 5b is provided at a position 50 to 70 mm away from the position of the foreign matter sensor 5a and at a position 3 to 7 mm further below the position where the foreign matter sensor 5a is provided. The paper sensor 5b is located at a position closer to the rear side than the position of the foreign matter sensor 5a, at a position farther than 70 mm, at a position closer to 3 mm than the lower position of the foreign matter sensor 5a, or at a position farther than 7 mm. May not be detected well.

  As shown in FIG. 5, the clamp mechanism 5 in the cutting machine 1 of the present example having the above-described configuration controls the foreign matter clamp prevention operation, which is a feature of the present example, as follows. First, after the paper is placed on the placement table 3, the paper is inserted by a predetermined cutting amount from the paper insertion opening 2A and set at the cutting position.

  Thereafter, the clamp mechanism 5 is operated (lowered in this example) by the clamp mechanism operation switch 6B ("procedure" in FIG. 5: hereinafter referred to as "#" 1). When the clamp mechanism operation switch 6B is turned on, the controller 6 lowers the presser member 5A (# 2).

  Thereafter, the control unit 6 determines whether the paper sensor 5b is in a detection state (hereinafter referred to as ON) or the foreign matter sensor 5a is turned on, that is, either the paper sensor 5b or the foreign matter sensor 5a is turned on first. Until # 3 and # 6 are looped with NO, the monitoring system is established.

  Here, when there is a foreign object such as a finger on the paper, the control unit 6 determines whether the foreign object sensor 5a is turned on first or the paper sensor 5b is turned on first by the lowering operation of the pressing member 5A. The operation of the clamp mechanism 5 is varied.

  That is, the positional relationship between the foreign matter sensor 5a and the paper sensor 5b is based on the following experimental results. The length of the finger is about 50 mm on average, and according to experiments, it was rarely inserted into the cutting position beyond 50 mm to the back of the hand. Therefore, the paper sensor 5b is provided on the rear side farther than 50 mm from the front end portion of the pressing member 5A.

  The paper sensor 5b has a finger height (thickness from the nail surface to the belly of the finger) that is higher than about 7 mm on average when the finger is present due to the lowering of the pressing member 5A. If the finger is present, the foreign matter sensor 5a positioned on the front side of the presser member 5A is turned on before the paper sensor 5b, and the finger is determined based on the following combination of detections. It becomes possible to detect the insertion of (foreign matter).

  As shown in FIG. 6A, when the finger is not present at the cutting position, the control unit 6 first turns on the sheet sensor 5b (YES in # 3) as the presser member 5A descends. It is determined whether or not the foreign matter sensor 5a is turned on only by the time, that is, by the time when the foreign matter sensor 5a is lowered to the position where the foreign matter sensor 5a is turned on (NO in # 4). When the foreign matter sensor 5a is turned on (YES in # 4), the lowering operation of the pressing member 5A is continued and the paper is clamped (# 5), assuming that there is no finger or foreign matter.

  On the other hand, as shown in FIG. 6B, when the finger is present at the cutting position, the controller 6 first turns on the foreign matter sensor 5a as the presser member 5A descends (NO in # 3). At this time, it is determined that the finger is present at the cutting position, and the clamp mechanism 5 is controlled so that the pressing member 5A is reversed and raised (# 6).

  By setting in this way, in the above-described case, in the combination in which the foreign matter sensor 5a is turned on before the predetermined time elapses after the paper sensor 5b is turned on, the control unit 6 turns on the paper sensor 5b. Therefore, since the foreign matter sensor 5a is not turned on first, turning on the foreign matter sensor 5a before a predetermined time elapses can be controlled to continue the clamping operation by judging that the paper is corrugated.

  In other words, it is common for paper to rip and become wrinkled due to the humidity in the factory and paper conditions. However, if this is repeatedly inserted into the cutting position of a finger and erroneous detection is performed, the work efficiency decreases. In addition, the reliability of the cutting machine 1 itself will be reduced.

  Therefore, the cutting machine 1 according to the present invention can reliably detect the insertion of a finger (foreign matter) at the cutting position at the time of clamping, and prevents erroneous detection of paper undulations and wrinkles. Can be used safely.

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Main body 2A Paper insertion port 3 Mounting stand 4 Cutting mechanism 5 Clamping mechanism 5A Pressing member 5a Foreign substance sensor 5b Paper sensor 6 Control part 6A Cutting mechanism operation switch 6B Clamp mechanism operation switch

Claims (2)

  A cutting table provided with a mounting table for mounting paper, a clamp mechanism provided on the mounting table and having a pressing member for clamping the paper at a cutting position, and a cutting mechanism for cutting the paper clamped by the clamping mechanism. In the machine, a sensor provided on the presser member of the clamp mechanism for detecting the presence of foreign matter at the sheet cutting position, and before the presser member comes into contact with the foreign matter when the presence of the foreign matter is detected by the sensor. And a control unit that controls the clamp mechanism so as to perform an operation opposite to the clamp operation of the presser member.   The cutting machine according to claim 1, wherein a plurality of sensors are provided at different positions of the pressing member, and the control unit determines whether the foreign object and the paper are wavy or wrinkled based on a combination condition of detection results of the sensors.

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