JP6530922B2 - Cutting machine - Google Patents

Description

  The present invention is a cutting machine which is operated by an operator in a printing factory and which clamps stacked sheets as a cut material by a clamp mechanism and then cuts the sheet by a cutting mechanism, the operator's fingers are pinched by the clamp mechanism It relates to the technology which prevents that it falls.

  For example, a cutting machine as disclosed in Patent Document 1 has a cutting mechanism provided with a blade for cutting stacked sheets, which is a material to be cut, and fixes the material to be cut in the cutting position prior to cutting with this blade Clamp mechanism is provided.

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

  The cutting machine in the printing plant moves the stacked sheets placed on the mounting table of the cutting machine to the cutting position on the mounting table by the operator since the sheets are various in the printing order, and clamps The mechanism is operated and clamped, and then the cutting machine is operated and cut.

  As described above, since the cutting machine in the printing factory involves an operation by the operator, a safety mechanism is installed such that the blade does not operate when it is inserted into the cutting position with respect to the operation of the blade.

  However, although any cutting machine in the conventional printing factory has safety measures regarding the operation of the blade as described above, since no safety measures regarding the operation of the clamp mechanism are provided, the finger is pinched at the time of clamping. I had a problem.

  That is, since the cutting machine operates the clamp mechanism prior to the operation of the blade, it is unlikely that the finger is clamped with the sheet when the blade is operated, and the blade is operated with the finger clamped. Since it is impossible, there is no case where the blade damages the finger, and it is a fact that most of the accidents in the cutting machine pinch the finger in the clamp mechanism.

Unexamined-Japanese-Patent No. 2002-326185

  The problem to be solved by the present invention is that, in the conventional cutting machine in a printing factory, an accident of pinching a finger occurs at the time of the clamping operation because the clamping mechanism does not have a safety measure.

The present invention comprises a mounting table for mounting a sheet, a clamp mechanism provided on the mounting table and having a pressing member for clamping the sheet at a cutting position, and a cutting mechanism for cutting the sheet clamped by the clamp mechanism. A foreign object sensor provided on the pressing member of the clamp mechanism and detecting that a foreign object is present at the cutting position of the sheet, and a position where the foreign object sensor of the pressing member is provided. A sheet sensor provided at a position separated from the position where the foreign matter sensor is provided at a position opposite to the side where the sheet of the table is inserted into the cutting position, and which detects the rippling or wrinkles of the sheet. before the pressing member is in contact with those foreign substances upon detecting the presence of foreign substances by the object sensor prior to the sensor, the clamp so that the pressing member performs the opposite operation to that of the clamping operation A control unit for controlling the structure, and the most important feature that was provided.

The present invention, when detecting the presence of foreign substances by the object sensor before the paper sensor before presser member abuts a foreign object, controls the presser member to perform the opposite operation to that of the clamping operation Therefore, even if the clamp mechanism is operated while the finger is in the cutting position, the pressing member is separated from the finger before contacting the finger, and the finger is not pinched.

FIG. 1 is a perspective view showing a main part of a cutting machine according to the present invention. FIG. 2 is a main part view of the cutting machine of the present invention, in which (a) is a view on arrow A in FIG. 1 and (b) is a view on arrow B in FIG. 3 (a) is a front view, FIG. 3 (b) is a rear view, FIG. 3 (c) is a bottom view, and FIG. 3 (d) is a sectional view taken along the line C-C. e) is a cross-sectional view taken along the line D-D. FIG. 4 is a block diagram showing the outline of the main part of the cutting machine of the present invention. FIG. 5 is a control flowchart of a clamp mechanism in the cutting machine of the present invention. FIG. 6 shows the operation of the clamp mechanism in the cutting machine of the present invention, in which (a) shows the state without foreign matter and (b) shows the state with foreign matter.

The present invention relates to a cutting machine involving an operation by a worker in a printing factory, in which a foreign material is present at the sheet cutting position of a sheet on the pressing member of the clamp mechanism, causing a problem that an operator's fingers are pinched by the clamp mechanism and injured. Away from the position where the foreign matter sensor is provided at a position away from the position where the foreign matter sensor that detects the foreign matter sensor and the foreign matter sensor of the pressing member is provided on the opposite side to the side where the sheet of the mounting table is inserted into the cutting position The sheet sensor is provided at the position where the pressing of the pressing member is performed before the pressing member contacts the foreign object when the presence of the foreign object is detected by the foreign object sensor prior to the sheet sensor. Is eliminated by providing a control unit that controls the clamp mechanism to perform the opposite operation.

The present invention having the above structure, when the sheet sensor detects the object sensor before a predetermined time elapses after the previously detected, it is determined that the waving and wrinkling of the sheet by letting you continue the clamping operation It is also good.

  Hereinafter, specific embodiments of the present invention will be described with reference to FIGS. In addition, in FIGS. 1-6, the detailed structure of the cutting machine is abbreviate | omitted and only the principal part of this invention is shown roughly. There are many types of cutting machine 1 shown in the present embodiment, but the present invention is applicable to the type shown in FIG. 1 in which the operator performs clamping and cutting of sheets.

  A sheet insertion opening 2A penetrating in the front-rear direction is formed at a predetermined height position of the main body 2 (shown by a two-dot chain line) of the cutting machine 1, and the front and rear sides of the main body 2 of the sheet insertion opening 2A are formed. There is provided a mounting table 3 on which the sheet is placed.

  Hereinafter, in the main body, the front side means the side on which the sheet is placed and inserted into the sheet insertion port 2A, and the rear side means the side opposite to the front side in the main body 2. Then, the mounting table 3 is extended from the sheet insertion opening 2A to the rear side of the main body 2.

  A cutting mechanism 4 and a clamp mechanism 5 are provided above the mounting table 3 at an intermediate position in the front-rear direction of the sheet insertion port 2A inside the main body 2. The cutting mechanism 4 has a raising and lowering mechanism (not shown) for raising and lowering the blade 4A provided along the width direction of the main body 2 (meaning the horizontal direction with respect to the front and rear).

  The clamp mechanism 5 has an elevation mechanism (not shown) for raising and lowering a pressing member 5A provided close to the rear side of the blade 4A of the cutting mechanism 4. The lifting mechanism of the cutting mechanism 4 and the lifting mechanism of the clamp mechanism 5 are controlled to be able to move up and down by the control unit 6 independently of each other.

  That is, as shown in FIG. 4, the control unit 6 is connected to the cutting mechanism 4 (the lift mechanism thereof, hereinafter abbreviated) and the clamp mechanism 5 (the lift mechanism thereof hereinafter abbreviated), and the front end face of the mounting table 3 Two steps are provided, and cutting mechanism operation switch 6A which operates cutting mechanism 4 by simultaneous operation with both hands and foot lower than height where mounting base 3 is located at the front of main body 2, ie, footing at installation site of main body 2 A pedal type clamp mechanism operation switch 6B is connected.

  Further, the control unit 6 is provided at both ends in the width direction of the entrance where the sheet of the sheet insertion port 2A of the main body 2 is inserted, and is a safety for controlling the trimming mechanism 4 which detects whether the sheet exists in the mounting table 3 A sensor 4a, a foreign matter sensor 5a for detecting a foreign object, for example, when a finger is present as a foreign matter at a cutting position (the lowered position of the blade 4A in the sheet insertion slot 2A), and a foreign matter sensor 5a in this example A sheet sensor 5b is connected to detect that the sheet is corrugated or wrinkled according to the combination condition of

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

  As shown in FIGS. 2 and 3, in the present embodiment, the clamp mechanism 5 is flat in the front side and has a comb-like shape with a predetermined distance from the flat side to the rear side, and the lower end of the pressing member 5A. A foreign object sensor 5a and a sheet sensor 5b are provided in pairs at both ends in the width direction at positions further downward by predetermined dimensions respectively from the position (foreign particle sensors 5a and 5a and sheet sensors 5b and 5b).

  The foreign matter sensor 5a and the paper sensor 5b are all photoelectric sensors, and one of the foreign matter sensors 5a and 5a, one of the paper sensors 5b and 5b is the light emitting side, the other of the foreign matter sensors 5a and 5a, the other of the paper sensors 5b and 5b Is the light receiving side, and becomes a detection state when the light reception is interrupted.

  The foreign matter sensor 5a is provided at the front end of the pressing member 5A, and is provided about 3 to 7 mm below the lower end position of the pressing member 5A. If the position is higher than 3 mm, there is a possibility that the pressing member 5A may contact a foreign object (finger) at a time lag from when the foreign object sensor 5a detects to when the clamp operation is actually reversely operated. In the condition setting with the paper sensor 5b described later, there is a possibility that the paper can not be detected properly.

  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 below the position where the foreign matter sensor 5a is provided. The paper sensor 5b is only at the back of the foreign object sensor 5a at a position closer than 50 mm or 70 mm away, or at a position closer than 3 mm or lower than 7 mm from the lower position of the foreign object sensor 5a. May not be detected properly.

  As shown in FIG. 5, in the clamp mechanism 5 in the cutting machine 1 of this example of the above configuration, the control of the operation for preventing the clamp of foreign matter, which is a feature of this example, is performed as follows. First, after the sheet is placed on the mounting table 3, the sheet is inserted from the sheet insertion port 2A by a predetermined cutting amount, and set at the cutting position.

  After that, the clamp mechanism 5 is operated (lowered in this example) by the clamp mechanism operation switch 6B ("Procedure" 1 in FIG. 5: hereinafter referred to as "# 1"). When the clamp mechanism operation switch 6B is turned on, the control unit 6 lowers the pressing member 5A (# 2).

  After that, the control unit 6 determines whether the sheet sensor 5b is in the detection state (hereinafter referred to as ON) or whether the foreign object sensor 5a is ON, that is, either the sheet sensor 5b or the foreign object sensor 5a is ON first. Loop up # 3 and # 6 with NO until the monitoring system.

  Here, when a foreign object, for example, a finger is present on the sheet, the controller 6 determines whether the foreign object sensor 5a is turned on first or the sheet sensor 5b is turned on first by the lowering operation of the pressing member 5A. The operation of the clamp mechanism 5 is made different.

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

  In the case where the sheet sensor 5b has fingers due to the lowering of the pressing member 5A, the height of the fingers (the thickness from the surface of the nail to the inside of the finger) is approximately higher than 7 mm on average. By further positioning 3 to 7 mm further downward, the foreign object sensor 5a located on the front side of the pressing member 5A is turned on earlier than the sheet sensor 5b if a finger is present, and the finger is detected based on the following combination of detections. It is possible to detect the insertion of (foreign material).

  As shown in FIG. 6A, when there is no finger at the cutting position, the control unit 6 turns on the sheet sensor 5b first as the pressing member 5A descends (YES in # 3). 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 from the relationship with the descending speed (NO in # 4). If the foreign matter sensor 5a is turned on (YES in # 4), the lowering operation of the pressing member 5A is continued on the assumption that no finger or foreign matter is present, and the sheet is clamped (# 5).

  On the other hand, as shown in FIG. 6 (b), when fingers are present at the cutting position, the controller 6 turns on the foreign matter sensor 5a first as the pressing member 5A descends (NO in # 3, At this time, assuming that the finger is in the cutting position, the clamp mechanism 5 is controlled so that the pressing member 5A is turned up (# 6).

  By setting in this manner, the control unit 6 turns on the sheet sensor 5b in the case of the combination in which the foreign matter sensor 5a is turned on before the predetermined time elapses after the sheet sensor 5b is turned on in the above. Because the foreign object sensor 5a is not turned on first, it is possible to perform control such that the clamping operation is continued by judging that the foreign object sensor 5a has been turned on before the predetermined time has elapsed.

  In other words, it is common for paper to be corrugated or wrinkled depending on the moisture and paper conditions in the factory, but if this is repeatedly inserted into the cutting position of fingers and false detection, work efficiency will decrease In addition, the reliability of the cutting machine 1 itself will eventually decrease.

  Therefore, the cutting machine 1 of the present invention can lower working efficiency by reliably detecting the insertion of a finger (foreign material) to the cutting position at the time of clamping and by preventing erroneous detection of the waving or wrinkle of the sheet. Can be used safely.

DESCRIPTION OF SYMBOLS 1 cutting machine 2 main body 2A paper insertion slot 3 mounting base 4 cutting mechanism 5 clamp mechanism 5A pressing member 5a foreign object sensor 5b sheet sensor 6 control part 6A cutting mechanism operation switch 6B clamp mechanism operation switch

Claims (2)

Cutting with a mounting table for mounting a sheet, a clamp mechanism provided on the table and having a pressing member for clamping the sheet at a cutting position, and a cutting mechanism for cutting the sheet clamped by the clamp mechanism Machine, the foreign matter sensor provided on the pressing member of the clamp mechanism and detecting the presence of foreign matter at the cutting position of the paper, and the sheet of the placing table from the position where the foreign matter sensor of the pressing member is provided A sheet sensor is provided at a position opposite to the side to be inserted into the cutting position, at a position spaced downward from the position where the foreign matter sensor is provided, for detecting a corrugation or wrinkle of a sheet, and earlier than the sheet sensor before the pressing member is in contact with those foreign substances upon detecting the presence of foreign substances by the object sensor, controls said clamp mechanism so as to perform the opposite operation to that of the clamping operation of the pressing member Cutting machine, characterized in that the control unit, the provided that. Control if control section is the paper sensor detects the object sensor before elapse of a predetermined time after detecting earlier, according to claim 1, wherein it is determined that the waving and wrinkling of the sheet, characterized in that to continue clamping operation Cutting machine.

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