JP3124433U - Film roll trimming device - Google Patents

Abstract

There is provided a film roll trimming apparatus capable of controlling the cutting depth to be constant without an operator monitoring and adjusting the cutting depth of a film cutting blade.
SOLUTION: A machine base 11, a roll holding unit 20 that rotates and holds a film roll R, a film cutting blade 30 that cuts a cut surface of the film roll R, and a film cutting blade that moves forward and backward with respect to the cut surface of the film roll. A cutting blade holding section 40 that is freely held, a roll cutting surface position detection sensor 70 that detects the position of the cut surface of the film roll, and a cutting blade position detection sensor 75 that detects the position of the film cutting blade with respect to the film cutting surface. And the cutting depth c of the film cutting blade with respect to the cut surface of the film roll is set to a predetermined value based on detection signals of the roll cutting surface position detection sensor and the cutting blade position detection sensor. And a control unit 80 for emitting a position change signal to the cutting blade holding unit.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for cutting a film roll by arranging a film cutting blade with respect to the cut surface of the film roll held in rotation, and in particular, for a film roll for controlling the cutting depth of the film cutting blade to be constant. The present invention relates to a trimming apparatus.

  A film roll (raw material) in which a synthetic resin film is wound around a paper tube to form a roll may be trimmed to a predetermined width according to a user's request. As an apparatus for trimming this type of film roll relatively easily, for example, a trimming apparatus 100 shown in FIG. 8 is known.

  The trimming apparatus 100 includes a machine base 111, a shaft member 120 that is inserted into the paper tube P of the film roll R and fixed integrally with the film roll R, and the shaft member 120 is detachable from the machine base 111. A shaft driving unit 130 that holds and rotates the film roll at a predetermined speed, and a film cutting arm unit that is disposed on the machine base 111 so as to be capable of being pressed against the cut surface F1 of the film roll R with a predetermined pressure. 140, a film cutting blade 150 held by the film cutting arm part 140 so as to be freely rotatable at a predetermined angle so that the cutting end face of the film roll R and the side surface of the blade part do not contact each other, and a predetermined value with respect to the paper tube P The paper tube cutting arm portion 160 disposed on the machine base 111 so as to be able to be pressed by the pressure of A tube cutting blade 170, and an excess film winding section 180 for winding up the excess film F2 excised by the film cutting blade 150. In the figure, reference numerals 112 and 113 are guide rollers for the surplus film F2, 114 is a guide ring for the surplus film F2, and F is a synthetic resin film.

  In the trimming apparatus 100, the film cutting blade 150 is held by the film cutting arm portion 140 at a predetermined angle so that the cutting end surface of the film roll R and the side surface of the blade portion do not come into contact with each other. The cut end face is not fused, and cutting with accurate dimensions becomes possible.

  By the way, as for the film roll R, the winding state is so hard that it is hard to cut | disconnect, the center part vicinity where the film is pressed. Therefore, when the pressure with respect to the cut surface F1 by the film cutting arm part 140 is constant, the pressure of the film cutting arm part 140 is excessively applied to the position farther from the center part of the film roll R, and the film cutting blade 150 is moved. The closer to the cut surface, the closer the position, the less the pressure of the film cutting arm part 140, the film cutting blade 150 becomes difficult to enter the cut surface, the film cutting blade 150 bites into the cut surface, and the film cannot be cut, etc. When the excess film is wound up, the surplus film is cut and the operation is interrupted.

  In order to solve the above problem, the conventional trimming apparatus 100 is provided with a pressure adjusting means capable of adjusting the pressure in the film cutting arm part 140, and the pressure is appropriately adjusted according to the hardness of the film roll R at the time of cutting. Composed. However, in the conventional trimming apparatus 100, since the operator needs to manually operate the pressure adjustment while visually monitoring the cutting state of the film roll R, the rough adjustment of the pressure is always possible. It is difficult to apply an appropriate pressure stably. Therefore, the cutting depth with respect to the cut surface F1 of the film cutting blade 150 is not constant, and the cut surface of the film roll R is uneven, or the surface portion of the surplus film F2 fixed to the shaft member 120 is displaced. Thus, there is a problem that the excess film F2 is cut and proper winding becomes difficult.

  The present invention has been made in view of the above points, and an operator of a film roll capable of controlling the cutting depth to a constant without an operator monitoring and adjusting the cutting depth of the film cutting blade. A trimming apparatus is provided.

  Specifically, the invention of claim 1 is a machine base (11), a roll holding part (20) for rotating and holding a film roll (R) on the machine base, and a film roll (R) held by the roll holding part. A film cutting blade (30) for cutting the cut surface, a cutting blade holding portion (40) for holding the film cutting blade forward and backward with respect to the cut surface of the film roll, and the roll holding portion. A roll cutting surface position detection sensor (70) for detecting the position of the cut surface of the film roll, a cutting blade position detection sensor (75) for detecting the position of the film cutting blade with respect to the film cutting surface, and the roll cutting Based on detection signals from the surface position detection sensor and the cutting blade position detection sensor, a cutting depth (c) of the film cutting blade with respect to the cut surface of the film roll is set in advance. To a predetermined value which, according to the trimming device of the film roll, characterized in that a control unit (80) for emitting a position change signal to the cutting blade holder.

  The invention according to claim 2 is the device according to claim 1, wherein the cutting blade holding portion includes a cylinder device, and the position change of the film cutting blade is performed by controlling the pressure to the cylinder device connected to the film cutting blade. The present invention relates to a film roll trimming apparatus.

  The invention of claim 3 is the film roll trimming according to claim 1, wherein the film cutting blade is inclined at a predetermined angle outward so that the side surface of the blade portion does not contact the cut end surface of the film roll. Related to the device.

  The invention of claim 4 is provided with a paper tube cutting blade for cutting a paper tube at a core portion of the film roll and a paper tube cutting arm portion for holding the paper tube cutting blade. When the distance measured by the cut surface position detection sensor reaches a predetermined value, the moving position of the paper tube cutting arm unit is changed in accordance with the measurement distance not changing for a predetermined time. The film roll trimming apparatus according to claim 1.

  According to the film roll trimming apparatus of the first aspect, the machine base (11), the roll holding part (20) for rotating and holding the film roll (R) on the machine base, and the roll holding part hold the film roll (R). A film cutting blade (30) for cutting the cut surface of the film roll (R), a cutting blade holding part (40) for holding the film cutting blade so as to be movable forward and backward with respect to the cut surface of the film roll, A roll cutting surface position detection sensor (70) for detecting the position of the cut surface of the film roll held by the roll holding unit, and a cutting blade position detection sensor (70) for detecting the position of the film cutting blade with respect to the film cutting surface. 75) and the film with respect to the cut surface of the film roll based on the detection signals of the roll cut surface position detection sensor and the cutting blade position detection sensor Since the control unit (80) that issues a position change signal to the cutting blade holding unit is provided so that the cutting depth (c) of the cutting blade becomes a predetermined value set in advance, the operator adjusts the cutting depth (c). It is possible to provide a film roll trimming apparatus capable of controlling the cutting depth of the film cutting blade to be constant without performing the above process.

  According to the invention of claim 2, in claim 1, the cutting blade holding portion includes a cylinder device, and the position change of the film cutting blade is performed by controlling the pressure to the cylinder device connected to the film cutting blade. Therefore, the position change of the film cutting blade can be controlled easily and easily.

  According to the invention of claim 3, the film cutting blade according to claim 1 is disposed so as to be inclined at a predetermined angle outward so that the side surface of the blade portion does not contact the cutting end surface of the film roll. It is possible to prevent fusion of the cut end face when the roll is cut.

  According to the invention of claim 4, in claim 1, a paper tube cutting blade for cutting the paper tube of the core portion of the film roll and a paper tube cutting arm portion for holding the paper tube cutting blade are provided, The control unit determines the movement position of the paper tube cutting arm unit according to the fact that the measured distance does not change for a predetermined time when the distance measured by the roll cutting surface position detection sensor reaches a predetermined value. Since it is configured to change, it becomes possible to automatically start the cutting operation of the paper tube, and the work efficiency can be further improved.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic view showing an embodiment of the trimming apparatus of the present invention, FIG. 2 is a schematic view showing a control mechanism by a control unit of the trimming apparatus of FIG. 1, and FIG. 4 is a top view of the main part showing the cutting state of the film roll, FIG. 5 is a top view of the main part showing the cutting state of the paper tube, and FIG. 6 is an outline of the sensor for detecting the cutting blade position. FIG. 7 and FIG. 7 are graphs showing the relationship between the position of the film cutting blade and the change in the measurement distance by the roll cutting surface position detection sensor.

  The trimming device 10 of the film roll R shown in FIGS. 1 and 2 rotates and holds the film roll R in which the synthetic resin film F is wound around the paper tube P, and cuts the edge of the film roll R to a predetermined width. To do. The illustrated film roll R trimming apparatus 10 includes a machine base 11, a roll holding unit 20, a film cutting blade 30, a cutting blade holding unit 40, a paper tube cutting blade 50, a paper tube cutting arm unit 60, A roll cutting surface position detection sensor 70, a cutting blade position detection sensor 75, a control unit 80, and a winding unit 90 are provided. In the figure, reference numeral 12 denotes a guide roller for the surplus film F2, and r denotes a radius to the cut surface F1 of the film roll R.

  The roll holding unit 20 rotates and holds the film roll R on the machine base 11. The roll holding unit 20 of the embodiment includes a shaft member 21 that is inserted into the paper tube P of the film roll R and fixed integrally from the inside thereof, and a driving device 25 that rotationally drives the shaft member 21. The driving device 25 rotates the shaft member 21 together with the film roll R by known driving means such as a motor via a gear or the like. In addition, the roll holding unit 20 includes a rail member 22 that is movable in the axial direction of the film roll R, and the cutting position of the film roll R can be adjusted by appropriately moving along the rail member. Is done. In addition, in order to adjust the cutting position by appropriately moving the roll holding unit 20 that rotates and holds the film roll R, it is not necessary to adjust the cutting position in the film cutting blade 30 described later, and the fill cutting blade 30 is being cut. It is possible to prevent the deviation of the cutting position at.

  The film cutting blade 30 cuts the cut surface F1 of the film roll R held by the roll holding unit 20. As shown in FIGS. 1 to 4, the film cutting blade 30 is composed of a circular blade which is configured to be freely rotatable with a single blade, and as defined in the invention of claim 3, the blade side surface 31 and the film roll R It is preferably recommended that the cutting end face R1 be arranged so as to be inclined at a predetermined angle θ so as not to contact the cutting end face R1. By comprising in this way, the fusion | melting of the films by the frictional heat of the cutting end surface R1 at the time of the cutting | disconnection of the film roll R can be prevented. The predetermined angle θ for inclining the film cutting blade 30 is appropriately set according to the material of the film to be cut.

  As shown in FIGS. 1 to 4, the cutting blade holding unit 40 holds the film cutting blade 30 so as to be movable forward and backward with respect to the cut surface of the film roll R. In this cutting blade holding part 40, the film cutting blade 30 can be advanced and retracted by using an appropriate drive device such as a motor. However, from an economical viewpoint, a cylinder device 45 connected to the film cutting blade 30 is provided. It is preferable to use it. In the figure, reference numeral 41 is a film cutting blade holding member, 42 is an arm member that is advanced and retracted by a cylinder device 45, and 46 is a pressure valve of the cylinder device 45.

  The paper tube cutting blade 50 cuts the paper tube P of the core O of the film roll R. As shown in FIGS. 1 to 3 and 5, the paper tube cutting blade 50 includes a circular blade that is configured to be freely rotatable with both blades. Further, the paper tube cutting blade 50 is disposed with the blade portion side surface 51 having a slight gap e with respect to the cutting end surface R1 of the film roll R. Thus, by using the double-edged circular blade, it is possible to suppress the generation of cutting waste of the paper tube P when cutting the paper tube P, and to make the cut surface of the paper tube P horizontal. In the figure, reference numeral P1 is a remaining paper tube, and P2 is an unnecessary portion of the paper tube P.

  As shown in FIGS. 1 to 3 and 5, the paper tube cutting arm unit 60 holds the paper tube cutting blade 50, and the paper tube cutting blade 50 with respect to the paper tube P of the film roll R. Configured to move forward and backward. The paper tube cutting arm unit 60 is configured to move the paper tube cutting blade 50 forward and backward using the cylinder device 65 in the same manner as the cutting blade holding unit 40. In the figure, reference numeral 61 denotes a holding member for the paper tube cutting blade, 62 denotes an arm member that moves forward and backward by the cylinder device 65, and 66 denotes a pressure valve of the cylinder device 65.

  As shown in FIG. 2, the roll cut surface position detection sensor 70 is disposed at a position a predetermined distance L away from the center O of the film roll R, and the cut surface of the film roll R held by the roll holding unit 20. The position f of F1 is detected. A known distance sensor is used as the roll cutting surface position detection sensor 70, and the distance d from the roll cutting surface position detection sensor 70 to the cutting surface F1 of the film roll R is measured as shown in the figure. Configured.

  The cutting blade position detection sensor 75 detects the position t of the film cutting blade 30 with respect to the film cut surface F1. A known rotary encoder is used as the cutting blade position detection sensor 75. As shown in FIG. 6, the cutting blade position detection sensor 75, which is a rotary encoder, engages the engaging portion 47 of the cylinder device 45 of the cutting blade holding portion 40 with the tooth portion 77 of the rotating member 76 formed of a gear. The rotation of the rotation member 76 of the sensor 75 is detected and preset when the cylinder device 45 is operated and the engagement portion 47 moves forward together with the arm member 42 of the cutting blade holding portion 40. The position t of the film cutting blade 30 is detected based on the position of the film cutting blade 30 according to the rotation of the rotating member 76.

  Based on the detection signals of the roll cutting surface position detection sensor 70 and the cutting blade position detection sensor 75, the control unit 80 is preset with a cutting depth c of the film cutting blade 30 with respect to the cutting surface F1 of the film roll R. A position change signal is issued to the cutting blade holder 40 so as to have a predetermined value. In the control unit 80 of the example, as shown in FIG. 2, the distance L from the center O of the film roll R to the roll cut surface position detection sensor 70 and the roll cut surface position detection sensor 70 were measured. Based on the distance d to the cut surface F1, the radius r of the film roll R to the cut surface F1 is calculated. Further, a distance s from the center O of the film roll R to the tip position t is calculated based on the tip position t of the film cutting blade 30 detected by the cutting blade position detection sensor 75. And the cutting depth c with respect to the cut surface F1 of the film roll R of the film cutting blade 30 is calculated based on the radius r and the distance s to the tip position t, and the cutting depth c is preset. A position change signal is generated so that the depth of cut is about 4 mm in this example.

  The controller 80 is configured to change the position of the film cutting blade 30 by controlling the pressure to the cylinder device 45 connected to the film cutting blade 30, as defined in the invention of claim 2. In the embodiment, the position change signal for setting the cutting depth c to a preset cutting depth is issued to the pressure valve 46 of the cylinder device 45, and as shown in FIG. When the measurement distance d by the surface position detection sensor 70 changes by a predetermined amount d1, the pressure of the pressure valve 46 is controlled so that the tip position t of the film cutting blade 30 is changed by the predetermined amount t1. At that time, the pressure force of the pressure valve 46 increases or decreases according to the thickness of the film roll R on the cut surface F1 (a low press force when the cut surface F1 is far from the core O, and a high press force when close). Controlled). Thereby, the position change of the film cutting blade 30 can be controlled easily and easily.

  In the control unit 80, as defined in the invention of claim 4, when the distance d measured by the roll cutting surface position detection sensor 70 becomes a predetermined value, the measurement distance d is predetermined. It is preferable that the moving position of the paper tube cutting arm unit 60 is changed according to the fact that the time does not change. In the embodiment, when the measurement distance d of the roll cutting surface position detection sensor 70 reaches the distance to the paper tube P, the paper tube cutting arm is changed according to the fact that the measurement distance d does not change for about 3 seconds. The section 60 is activated to start cutting the paper tube P. That is, the paper tube cutting arm unit 60 is configured to operate when about 3 seconds have elapsed after the film roll R has been cut. Further, as described above, the interval of about 3 seconds from the end of the cutting of the film roll R to the operation of the paper tube cutting arm unit 60 is that the thickness of the film F of the film roll R is extremely thin. By approximating the distance to the paper tube P and the distance immediately before the end of the cutting of the film roll R, the paper tube cutting arm unit 60 is simply activated when the measurement distance d reaches the distance to the paper tube P. This is to avoid the problem that the cutting of the paper tube P is started in a state where the cutting of the film roll R is not completely completed. With this configuration, it becomes possible to automatically start the cutting operation of the paper tube P, and the working efficiency is greatly improved. When the moving position of the paper tube cutting arm unit 60 is changed as described above, the moving position of the cutting blade holding unit 40 is changed prior to that (the film cutting blade 30 is moved away from the film roll R). Not too long.

  The surplus film winding unit 90 winds the surplus film F2 cut by the film cutting blade 30, and is interlocked with the rotation of the film roll R and the tension adjusting member 91 that moves up and down by the tension of the surplus film F2. The winding member 95 is configured to rotate in the axial direction. In the surplus film winding unit 90, the surplus film F2 cut from the film roll R is wound by the winding member 95 via the upper and lower guide rollers 92 and 93 of the tension adjusting member 91 alternately. Further, when winding the surplus film F2, the winding member 95 is swung in the axial direction, so that the winding of the surplus film F2 can be prevented from being biased, and the occurrence of tightening can be prevented. be able to. Further, since the surplus film F2 is linearly wound with respect to the winding direction, it is possible to prevent problems such as the surplus film F2 being cut during winding, and the surplus film F2 can be stably and reliably removed. Winding can be performed. Reference numeral 94 in the drawing is a weight for adjusting the tension of the tension adjusting member, and 96 is a moving member for swinging the winding member 95.

  Next, the operation of the trimming device 10 for the film roll R will be described. First, the film roll R is held by the shaft member 21 of the roll holding unit 20, and the cut portion is positioned by moving the roll holding unit 20 in the axial direction. After positioning the cut portion, the driving member 25 of the roll holding unit 20 is operated to rotate the film roll R together with the shaft member 21, and then the cutting blade holding unit 40 moves the film cutting blade 30 to the cut surface F1 of the film roll R. The film cutting blade 30 is pressed against the cutting surface F1, and then the film cutting blade 30 is bitten into the cutting surface F1 with a predetermined cutting depth (about 4 mm). Start cutting.

  When the surplus film F2 that has been cut off by starting the cutting of the film roll R as described above is taken up by the take-up unit 90, the radius r to the cut surface F1 of the film roll R gradually decreases to a predetermined value ( The cutting depth c of the film cutting blade 30 that has bited in at about 4 mm) changes. At that time, the cutting depth c is calculated based on the position of the cut surface F1 of the film roll R and the film cutting blade 30 detected by the roll cutting surface position detection sensor 70 and the cutting blade position detection sensor 75. As shown in FIG. 7, when the measurement distance d by the roll cutting surface position detection sensor 70 changes by a predetermined amount d1, the control unit controls the cutting depth c to a predetermined value (about 4 mm). A position change signal is issued from 80 to the cylinder device 45 (pressure valve 46) of the cutting blade holder 40. Based on the position change signal, the pressure of the cylinder device (pressure valve 46) is controlled to change the tip position t of the film cutting blade 30 by a predetermined amount t1, and the cutting depth c is a predetermined value (about 4 mm). Maintained. Thereafter, as the radius r changes to the cut surface F1 of the film roll R, the control of the cutting depth c by the control unit 80 is performed as needed.

  Further, when the measurement distance d by the cut surface position detection sensor 70 has not changed for about 3 seconds after the distance to the paper tube P is reached, that is, when the cutting of the film roll R is completed, the control unit 80 performs the cutting blade holding unit. A position change signal is issued to the cylinder device 45 (pressure valve 46) of 40 so that the film cutting blade 30 is moved away from the film roll R, and the cutting blade holding part 40 moves the film cutting blade 30 backward based on the position change signal. Let At the same time, the control unit 80 issues a position change signal so as to press the paper tube cutting blade 50 against the paper tube P against the cylinder device 65 (pressure valve 66) of the paper tube cutting arm unit 60, The paper tube cutting arm 60 advances the paper tube cutting blade 50 to cut the paper tube P, and the cutting operation of the film roll R is completed.

  The film roll trimming apparatus of the present invention is not limited to the above-described embodiments, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention.

  In the trimming device 10 of the embodiment, when the film roll R is rotated and held by the roll holding unit 20, the shaft member 21 is inserted into the paper tube P of the film roll R and fixed integrally from the inside. You may comprise by the well-known core chucking system which inserts a shaft member from the both ends side of the film roll R, and carries out rotation holding | maintenance in the both ends of this film roll R, respectively. If the film roll R is rotated and held in this manner by the core chucking method, the work of inserting the shaft member into the paper tube P of the film roll R can be reduced, and the shafts can be respectively viewed from both ends of the film roll R. By inserting and holding the member, hunting during rotation of the film roll R can be reduced.

It is the schematic showing one Example of the trimming device of this invention. It is the schematic showing the control mechanism by the control part of the trimming apparatus of FIG. It is a side view showing the action | operation of a cutting blade holding | maintenance part and a paper tube cutting | disconnection arm part. It is a top view of the principal part which shows the cutting state of a film roll. It is a top view of the principal part which shows the cutting state of a paper tube. It is the schematic of a cutting blade position detection sensor. It is the graph showing the relationship between the position of a film cutting blade, and the change of the measurement distance by the sensor for roll cut surface position detection. It is the schematic of the conventional trimming apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Trimming apparatus 11 Machine stand 12 Guide roll 20 Roll holding part 30 Film cutting blade 40 Cutting blade holding part 45 Cylinder apparatus 50 Paper tube cutting blade 60 Paper tube cutting arm part 70 Roll cutting surface position detection sensor 75 Cutting blade position detection Sensor 80 Control unit 90 Winding unit F Synthetic resin film F1 Cut surface F2 Surplus film P Paper tube R Film roll

Claims (4)

Machine stand (11),
A roll holder (20) for rotating and holding the film roll (R) on the machine base;
A film cutting blade (30) for cutting the cut surface of the film roll (R) held by the roll holding unit;
A cutting blade holding portion (40) for holding the film cutting blade so as to be movable forward and backward with respect to the cut surface of the film roll;
A roll cut surface position detection sensor (70) for detecting the position of the cut surface of the film roll held by the roll holding unit;
A cutting blade position detection sensor (75) for detecting the position of the film cutting blade with respect to the film cutting surface;
Based on detection signals of the roll cutting surface position detection sensor and the cutting blade position detection sensor, a cutting depth (c) of the film cutting blade with respect to the cutting surface of the film roll is set to a predetermined value. The control unit (80) that issues a position change signal to the cutting blade holding unit
And a film roll trimming apparatus.   The film roll trimming device according to claim 1, wherein the cutting blade holding unit includes a cylinder device, and a change in position of the film cutting blade is performed by controlling a pressure applied to the cylinder device connected to the film cutting blade.   The film roll trimming device according to claim 1, wherein the film cutting blade is disposed so as to be inclined at a predetermined angle outward so that a side surface of the blade portion does not contact a cutting end surface of the film roll. A paper tube cutting blade that cuts the paper tube at the core of the film roll and a paper tube cutting arm portion that holds the paper tube cutting blade;
The control unit determines the movement position of the paper tube cutting arm unit in response to the measurement distance not changing for a predetermined time when the distance measured by the roll cutting surface position detection sensor reaches a predetermined value. The film roll trimming apparatus according to claim 1, wherein the film roll trimming apparatus is configured to be changed.

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