JP3628381B2 - Cylindrical film manufacturing equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an improvement in an apparatus for manufacturing a cylindrical film that prevents the polymerization portion from being displaced when both ends are overlapped to form a cylinder while the film is being transferred.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a label that is externally fitted on the outer periphery of a container, a bottle, or the like, a label made of a cylindrical film formed in a cylindrical shape by overlapping both end portions of the film is generally used.
[0003]
[Problems to be solved by the invention]
In order to manufacture such a cylindrical film, as shown in FIG. 6, while the long film 31 on which printing or the like has been performed is transferred, both ends of the film 31 are moved toward each other by the guide 34 or the like. After superimposing, the film 31 is transferred by the roller 36 or the like, and a solvent, an adhesive, or the like is applied to the inner end portion of the upper film 31 by the application device 35 located near the transfer device. In addition, a cylindrical film manufacturing apparatus is used in which both end portions of the film 31 are bonded with a solvent or the like to form a cylindrical film.
[0004]
However, in the case where the film 31 is formed into a cylindrical shape while being transferred in this way, the position of the overlapping portion 32 of the film 31 is shifted in the circumferential direction at the time of transfer, so that meandering of the overlapping portion 32 occurs, and the entire tubular film is formed. Twist occurred in some cases.
When the overlapped portion 32 of the film is displaced in the circumferential direction, the adhesive is applied on the inner side by the displaced distance d as shown in FIG. There has been a problem that the end of each cannot be securely bonded.
[0005]
In addition, there is a case where the cylindrically formed film is once flattened and stored again in a roll shape. However, when the position of the overlapping portion is shifted as described above, the crease position when flattened is twisted. Inconvenience occurred.
[0006]
Further, when the tubular film is transferred while twisting is generated, there is a problem that wrinkles or the like are generated in the tubular film and the appearance as a label is impaired.
In the case where such a twist occurs, the apparatus is conventionally stopped and corrected manually. However, such work is complicated, and the apparatus must be stopped once to improve productivity. Has led to a decline.
[0007]
The present invention has been made in order to solve such problems. When manufacturing a cylindrical film, the manufacturing of the cylindrical film for manufacturing a cylindrical film that prevents the lateral displacement of the film and does not twist. It is an object to provide an apparatus.
[0008]
[Means for Solving the Problems]
The present invention, as a means has been made in order to solve such problems, while transferring the long film 4 having a printed layer 14, both end portions 4a, Intention and 4b is one end portion 4a in other tubular film manufacturing apparatus for manufacturing an adhesive is applied adhered tubular of the film the overlapping portion 7 which is polymerized on the inner surface of the formed one end 4a on the end 4b, the polymerization unit 7 is detected by the position of the end portion 14a of the printed layer 14 along one end portion 4a in the overlapping portion 7, and the detection signal from the detection means 2 is received and the film is received. And a position control means 6 for controlling the overlapping portion 7 to be in a predetermined position by moving 4 in the circumferential direction.
[0009]
Furthermore, as another means, while transporting the long film 4 , the both ends 4a and 4b are brought close together to form a superposed part 7 in which one end 4a is superposed on the other end 4b. In the cylindrical film manufacturing apparatus for manufacturing a cylindrical film by applying and bonding an adhesive to the inner surface side of one end 4a , the circumferential position shift of the overlapping portion 7 was printed on the film surface. and detection means 2 for detecting the position of the mark and the position control means 6 for receiving a detection signal from the detection means 2 to move the film 4 in the circumferential direction overlapping portion 7 is controlled to be in a predetermined position It is to have.
[0010]
[Action]
That is, the circumferential direction of the positional deviation of the overlapping portion 7 as described above, the detecting means 2 for detecting the position of the end portion 14a of the printed layer 14 along the one end 4a of the overlapping portion 7, from the detection means 2 the detection signal moves received by the film 4 in the circumferential direction and the polymerization unit 7 and a position control means 6 for controlling to a predetermined position, while transferring the tubular film 4, the film 4 When a deviation from the predetermined position in the circumferential direction occurs, the detection means 2 detects and transmits a signal, and the position control means 6 that receives the signal moves the film 4 in the opposite direction by the amount of deviation. To return to the original position. Accordingly, it is possible to form a cylindrical film having a superposed portion at a certain position without stopping the transfer of the film 4 while automatically correcting the twist of the label.
[0011]
Further, the detecting means 2 for detecting the circumferential position shift of the overlapping portion 7 by the position of the mark printed on the film surface, and the detection signal from the detecting means 2 is received to move the film 4 in the circumferential direction. Since the position control means 6 for controlling the overlapping portion 7 to be in a predetermined position is provided , when the film 4 is displaced in the circumferential direction from the predetermined position while the cylindrical film 4 is being transferred, The detection means 2 detects and transmits a signal, and the position control means 6 that has received the signal can move the film 4 in the opposite direction and return it to the original position. Therefore, it is possible to form a cylindrical film having a superposed portion at a certain position without stopping the transfer of the film 4 while automatically correcting the twist of the label .
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1 to FIG. 3, reference numeral 1 denotes a polymerization process in which a long heat-shrinkable film 4 is transported and guided by a guide 15 around both ends 4 a and 4 b of the film 4 around the inner plate 12. And it is a cylindrical film manufacturing apparatus formed in a cylindrical shape.
[0013]
As shown in FIG. 4, the film 4 is formed in a cylindrical shape so that a white print layer 14 is formed on one surface side of the transparent film layer 13 and the white print layer 14 becomes an inner surface.
[0014]
Reference numeral 7 denotes a superposed portion in which both end portions 4a and 4b of the film 4 are superposed on one end portion 4a on the other end portion 4b.
Reference numeral 2 denotes a detecting means comprising a pair of photoelectric tubes 2a and 2b that can detect the white printed layer 14 14a that passes through the transparent film layer 13 of the film 4 and is externally seen from the surface. The photoelectric tubes 2a and 2b are guides 15 It is provided near the surface of the lower film 4 and transmits a detection signal when it detects the end 14a of the white print layer 14.
[0015]
8 is a reflecting plate inserted between the overlapping portions 7 of the film 4 at the position detected by the detecting means 2, and the reflecting plate 8 is formed on the white printed layer 14 at one end 4 a of the film 4. This is to prevent the end portion 14a from being indistinguishable by overlapping with the white print layer 14 of the end portion 4b of the lower film 4 (see FIG. 4).
[0016]
6 is a position control means comprising a pair of pressing rollers 6a, 6b provided slightly above the detection means and a pressing control means 5 for adjusting the pressing force of the pressing rollers 6a, 6b. Consists of a motor 5a and a control device 9 that receives the detection signal 2 from the detection means 2 and controls the rotation of the motor 5a according to the signal.
[0017]
As shown in FIGS. 2 and 3, the pressing rollers 6a and 6b are in contact with each other in an oblique direction so that both end portions 4a and 4 on the surface of the film 4 are centered on both sides of the overlapping portion 7 of the film 4. The surface of the film 4 is usually pressed with an equal pressing force while rotating by the transfer of the film 4 to fix the overlapping portion 7 of the film 4 at a predetermined position.
[0018]
Further, as shown in FIG. 3, the pressing rollers 6a and 6b are attached to a lever 11 attached in parallel to the film 4 behind the film 4 via springs 10a and 10b. The lever 11 is provided with the motor 5.
[0019]
The control device 9 controls the motor 5 by distinguishing a signal from the one phototube 2a and a detection signal from the other phototube 2b.
The motor 5 rotates in either the forward or reverse direction according to a signal from the control device 9, thereby moving the lever 11 connected to the motor 5 back and forth, and moving one of the pressing rollers 6a and 6b to the spring 10a. , 10b, the pressure of one pressing roller 6a against the film 4 is increased and the pressing force of the other pressing roller 6b is decreased.
[0020]
Reference numeral 17 denotes a nozzle for applying a solvent provided below the detecting means 2, and a pressing means 18 that comes into contact with the surface of the overlapping portion 7 of the film 4 is provided immediately below the nozzle 17.
[0021]
Reference numeral 19 denotes a cutter provided below the cylindrical film manufacturing apparatus 1, and the cutter 19 cuts the film 4 in a circumferential direction at a predetermined position to form a cylindrical label 20.
Reference numeral 21 denotes a container which is transported directly below the tubular film manufacturing apparatus 1 by a belt conveyor, and onto which the tubular label 20 pulled down by the transfer roller 22 is externally fitted.
[0022]
Next, the case where the film 4 is formed into a cylindrical shape by the cylindrical film manufacturing apparatus 1 will be described.
[0023]
First, as shown in FIG. 1, the long film 4 is transported in the longitudinal direction, and the film 4 is wound around the inner plate 12 by a pair of guides 15 to form a cylindrical shape.
[0024]
At this time, a superposition part 7 in which one end part 4a of both end parts 4a and 4b of the film 4 is superposed on the other end part 4b is formed in the center, and the white print layer 14 of the film 4 becomes an inner surface. The film 4 is formed into a cylindrical shape.
[0025]
Usually, when the film 4 is transferred without being displaced, as shown in FIG. 4, the end portion 14a of the white print layer 14 is located between the two photoelectric tubes 2a and 2b, and the polymerization of the film 4 is further performed. Since the reflection plate 8 is inserted between the portions 7, one photoelectric tube 2 a detects the surface of the reflection plate 8, and the other photoelectric tube 2 b detects the white print layer 14 through the transparent film layer 13.
Therefore, since both the phototubes 2a and 2b do not detect the end portion 14a of the white print layer 14, the detection signal is not transmitted to the control device 9, and the lever 11 moves relative to the film 4 while the motor 5 remains stationary. Maintained in a parallel state.
[0026]
Therefore, both pressing rollers 6a and 6b press the film 4 on both sides of the overlapping portion 7 with an equal force, and the film 4 is transferred downward without moving in the circumferential direction.
[0027]
Further, the film 4 transferred downward is coated with an adhesive on the inner surface side of the end portion 4a of the film 4 on the upper side by the nozzle 17 provided below the detection means 2, and then pressed and bonded by the pressing means 18. And formed into a cylindrical film.
[0028]
Next, the case where the cylindrical film is twisted during the transfer until the film 4 is bonded and the position of the overlapping portion 7 is displaced in the circumferential direction will be described.
[0029]
For example, as shown in FIG. 5 (a), when the end 14a of the white print layer 14 moves in the direction of one phototube 2a, the phototube 2a becomes the end of the white print layer 14. The unit 14a is detected and a detection signal is sent to the control device 9.
Upon receiving the detection signal from one phototube 2a, the control device 9 rotates the motor 5 in the direction A, the lever 11 also rotates as the motor 5 rotates, and one end 11a is moved rearward to move the spring 10a. However, since the one pressing roller 6a is drawn back, the force which presses on the surface of the film 4 becomes strong.
[0030]
On the other hand, the other pressing roller 6b attached to the other end 11b by the rotation of the lever 11 loosens the force that the spring 10b pulls the pressing roller 6b rearward, so that the pressing force to the film 4 is also weakened.
[0031]
At this time, since the film 4 is fixed by the inner plate 12 so as to have a constant width, as a result, when the pressing force of one pressing roller 6a becomes larger than the other pressing roller 6b, the entire film 4 becomes the inner plate 12. Will move from the side of one roller 6a toward the overlapping portion 7 so that the overlapping portion 7 returns to its original position.
[0032]
Further, when the overlapping portion 7 is displaced in the opposite direction as shown in FIG. 5B, the end portion 14a of the white print layer 14 is detected by the other photoelectric tube 2b, and the control device 9 is connected to the photoelectric tube 2b. A detection signal is transmitted to.
Then, the control device 9 rotates the motor 5 in the direction B opposite to the above case, pulls the other pressing roller 6b backward, strengthens the pressing force of the other pressing roller 6b, and presses the one pressing roller 6a. The pressure on the film 4 is weakened, the film 4 is moved from the left side toward the center, and the overlapping portion 7 is returned to the original position again.
In this way, the end portion 14a of the white print layer 14 is always maintained between the two phototubes 2a and 2b, so that the cylindrical film 4 can be transferred while the overlapping portion 7 is fixed at a predetermined position. I can go.
[0033]
Thereafter, an adhesive is applied to the inner surface side of the end 4a of the film 4 by the nozzle 17, and is further pressed by the pressing means 18 to securely fix the bonded portion.
Furthermore, it is cut | disconnected by the cutter 19 in the circumferential direction, formed in the cylindrical label 20, and after carrying out external fitting mounting | wearing to the transferred container 21, it heat-shrinks and it closely_fit | attaches according to the shape of the container 21.
[0034]
Since the adhesive is applied by the nozzle 17 after correcting the misalignment of the overlapping portion 7 in this way, the adhesive can always be applied accurately to the end of the film 4, and the adhesive portion of the cylindrical label 20 can be attached. It can be firmly and securely bonded.
[0035]
In the above embodiment, the pair of pressing rollers 6a and 6b is used as the position control means 6 of the film 4. However, the position control means is not limited to such a roller. Means such as a means for gripping and moving from the outer surface may be used. In short, any position control means that can return the film 4 to its original position when the film 4 is displaced in the circumferential direction may be used.
[0036]
In the above embodiment, the pressing rollers 6a and 6b are connected to the lever 11 via the springs 10a and 10b. However, it is not a condition to connect the pressing rollers 6a and 6b via the springs 10a and 10b.
However, when the pressing rollers 6a and 6b are connected to the lever 11 via the springs 10a and 10b, the pressing force by which the pressing rollers 6a and 6b press the film 4 is moderated by the elastic force of the springs. There is an effect that the transfer of the film 4 is not prevented.
[0037]
In the above embodiment, the pair of photoelectric tubes 2a and 2b is used as the detection means 2, but it is not a condition that the detection means is a photoelectric tube, and an image sensor or a camera may be used. It may be a detection means that detects an end portion, unevenness, or the like. In short, any detection means that can detect that the film 4 has shifted in the circumferential direction may be used.
[0038]
Moreover, in the said Example, although formed so that the edge part 14a of the white printing layer 14 of the film 4 might be detected by the detection means 2, as a to-be-detected part like the edge part 14a of the white printing layer 14, other than this, A specific one may be detected from the photoelectric tube mark or the mark printed on the film surface, and the position where the detected portion is formed may be any position on the film 4 surface.
[0039]
In short, it is only necessary to provide a detection means and a detected portion that can detect that the film 4 is displaced from a predetermined position in either of the circumferential directions.
[0040]
Further, in the above embodiment, the end portion 14a of the print layer 14 which is the detected portion is positioned between the two phototubes, and the control device 9 detects when the photocell tube detects the end portion 14a. For example, when the white printing layer 14 is detected in both the phototubes 2a and 2b and when the reflecting plate 8 is detected in both the phototubes 2a and 2b, the control device 9 presses the pressure rollers 6a and 6b. The control method using the detection signal is not limited to the above embodiment.
[0041]
Further, in the above embodiment, the reflecting plate 8 is inserted into the overlapping portion 7 of the film 4 at the position to be detected. However, a colored sheet having a color different from the color of the print layer to be detected may be used. It suffices if the detected portion can be discriminated, and when a specific photoelectric tube mark or a specific portion is to be detected, such a reflector, a colored sheet or the like need not be provided.
[0042]
In the above embodiment, the motor 5 and the control device 9 connected to the motor 5 are provided as the pressure control means 5 for controlling the pressure of the pressure rollers 6a and 6b. However, such a pressure control means 5 is not used. Alternatively, the position control means 6 may directly receive the detection signal from the detection means 2 and the film may be moved so that the position control means corrects the deviation.
[0043]
Further, in the above embodiment, the detecting means 2 is provided upstream from the nozzle 17 for bonding the both end portions 4a and 4b of the tubular film 4, and the positional deviation of the overlapping portion 7 is corrected before bonding. Then, the detection means 2 and the position control means 6 may be provided below the adhesion means such as the nozzle 17 in order to correct the positional deviation of the adhesion portion.
[0044]
Further, in the above embodiment, the film 4 is formed into a cylindrical shape, and then immediately cut to form the label 20. However, after forming the other cylindrical shape, the cylindrical film may be stored once in a flat roll shape. Good.
In such a case, the position where the crease is formed and the twist of the tubular film do not occur, so that when flattened and stored in this state, wrinkles are generated and printing is adversely affected. This can be particularly effectively prevented.
[0045]
Further, in the above embodiment, the film 4 is wound around the inner plate 12 so that the diameter of the cylindrical film 4 is fixed, but as a means for fixing this diameter, the inner plate 12 is used. It is not limited to a flat plate, but may be a cylinder or a column. In short, when the film 4 is pressed in one direction by a pressing roller, the entire film can move in the circumferential direction without reducing the diameter of the cylindrical film. As long as it is a means for maintaining a constant diameter, the shape or the like is not limited.
[0046]
【The invention's effect】
As described above, the cylindrical film manufacturing apparatus of the present invention detects the shift by the detecting means when the film is displaced in the circumferential direction when the film is transferred, and the film is displaced in the circumferential direction. Since the position control means controls so that the overlapping part of the film is in its original position, it is possible to automatically correct the misalignment of the film and form a cylindrical film with the overlapping part always in the predetermined position. In addition, it is possible to form a label having a good appearance without twisting.
[0047]
Further, the position control means presses the overlapping portion of the film from both sides, and the pressing force of one pressing roller of the pressing rollers is made larger than the pressing force of the other pressing roller to In the case of being formed from a pressing control means that moves in the direction of the superposition part from the pressing roller side, the apparatus having a simple structure can prevent the displacement of the cylindrical film as described above, It is possible to easily and economically accomplish the work of correcting the film misalignment.
[0048]
Furthermore, since it is possible to automatically correct the misalignment while manufacturing the cylindrical film without stopping the transfer of the film, the cylindrical film can be manufactured efficiently and the production efficiency is improved. be able to.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an apparatus for producing a tubular film according to the present invention.
FIG. 2 is an enlarged front view of a main part of the tubular film manufacturing apparatus according to the present invention.
3 is a cross-sectional view taken along line XX in FIG.
FIG. 4 is an enlarged cross-sectional view of a main part of a portion where a film surface is detected by a detection means.
5A is a cross-sectional view showing a state in which the film is displaced in one of the circumferential directions, and FIG. 5B is a cross-sectional view showing a state in which the film is displaced in the other direction.
FIG. 6 is a front view showing a conventional tubular film manufacturing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical film manufacturing apparatus 2 Detection means 4 Film 5 Motor 6 Position control means 7 Superposition | polymerization part

Claims (3)

While transporting the long film (4) having the printing layer (14) , the two end portions (4a) and (4b) are brought close together so that one end portion (4a) is above the other end portion (4b) . in the manufacturing apparatus of the tubular film to produce a coating adhered to the tubular film adhesive on the inner surface of the formed one end polymerized polymerized unit (7) (4a), the polymerization unit (7 ) In the circumferential direction is detected by the position of the end portion (14a) of the printed layer (14) along one end portion (4a ) in the overlapping portion (7 ), and the detection means And a position control means (6) for receiving the detection signal from (2) and moving the film (4) in the circumferential direction to control the overlapping portion (7) to be in a predetermined position. An apparatus for producing a cylindrical film. The detection means (2) is a reflection plate (8) or photoelectric tube (2a) for detecting the end (14a ) of the printed layer (14) and a reflector (8) inserted between the overlapping portions (7 ) or The manufacturing apparatus of the cylindrical film of Claim 1 provided with a coloring sheet . Long film (Four) While transporting its both ends (4a), (4b) Close one end (4a) Is the other end (4b) Polymerized part polymerized on (7) Forming one end (4a) In a cylindrical film manufacturing apparatus for manufacturing a cylindrical film by applying an adhesive on the inner surface side of the (7) Detecting means for detecting the positional deviation in the circumferential direction of the film by the position of the mark printed on the film surface (2) And detection means (2) Receive the detection signal from the film (Four) Is moved in the circumferential direction. (7) Position control means for controlling so as to be at a predetermined position (6) The manufacturing apparatus of the cylindrical film characterized by comprising.

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