JP2008155928A - Cylindrical film conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical film conveying device capable of correctly forming a crease in a predetermined position so that no crease interferes with the joint when a new crease is formed by changing the folded form of a cylindrical film in the course of conveyance. <P>SOLUTION: The cylindrical film conveying device is designed as described below. In a certain place of a conveyance path, a tetrapod block 5 is disposed for changing the folded form of the cylindrical film 2 to the second folded form F2 so that a new crease b2 is formed relative to the crease b1 of an upstream first folded form F1 in the position where the film is distorted to a predetermined angle. The edges of the cylindrical film 2 are joined together by curving the sheetlike base material film into a cylindrical shape. In the first folded form F1, the base material is folded so that the joint 2a is located on one side of the film and across the widthwise direction. The cylindrical film conveying device is characterized by guiding the folded form so that the crease b2 of a downstream second folded form F2 is deviated from the joint 2a of the cylindrical film 2 in the widthwise direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is applied to, for example, a labeler that automatically attaches a cylindrical label such as a shrink film or a stretch film to a container body, and in particular, is a long cylindrical film that serves as a label base material for the cylindrical label. The present invention relates to a cylindrical film transport device that transports the film in a folded form.

As a conventional cylindrical film conveyance device of this type, for example, a device as shown in FIG. 4 is known.
That is, as shown in FIG. 4A, the cylindrical film 100 folded in a planar shape is transported to the cutting unit 101 and sequentially cut by a predetermined length to form a cylindrical label 102. It is opened and attached to a container body (not shown). The tubular film 100 is preliminarily provided with a mark m corresponding to the tubular label 102 to be cut. The mark sensor 103 detects the mark m and the cutting timing is controlled.

  For mounting on the container body, the cut label is opened by an air piece (not shown), inserted into a mandrel (not shown), and attached to the container body by a mandrel. The air piece has, for example, a configuration including two pairs of vacuum pads, and the vacuum pads are used to spread the front and back films by vacuum suction. The mandrel is a device that opens the cylindrical label wider than the circumference of the container with four or two pairs of claw-shaped members and inserts the cylindrical label into the container body.

  However, the cylindrical label 102 is difficult to expand in the form of being folded flat. Therefore, conventionally, as shown in FIGS. 4A and 4B, the folding form of the tubular film 100 is predetermined with respect to the fold line 100 a of the upstream first folding form F1 in the middle of the conveyance path. The form of the tubular label 102 that is provided with a tetrablock 104 as a folding form changing means for changing to the second folding form F2 so that a new fold line 100b is formed at an angle twisted position and is cut is shown in FIG. As shown to (E), it was set as the structure which is easy to expand provided with the crease | fold 100a, 100b of a total of four places of outward convex shape.

As shown in FIGS. 4C and 4D, the tetrablock 104 is a first edge portion 141 that linearly extends in a direction orthogonal to the transport direction along the planar film surface of the first folded form F1. And a second edge portion 142 on the downstream side linearly extending in a direction perpendicular to the conveying direction along the planar film surface of the second folding form F2, and from the first edge portion 141 to the second edge portion 142. And a guide portion 143 that gradually expands the tubular film 100 and guides it to the second folded form F2 as the tubular film 100 moves in the conveying direction.
Conventionally, the first edge portion 141 and the second edge portion 142 are set at positions orthogonal to each other, and the fold line 100b of the second fold form F2 is at a position of 90 degrees with respect to the fold line 100a of the first fold form F1. It was supposed to be formed.

However, in the case of the above-described prior art, the tubular film 100 is formed by rolling a sheet-like base film as shown in FIG. 5B, although it is easy to expand by the four folds 100a and 100b. In the case of a configuration in which both side edges are bonded, generally, in the first folding configuration F1, the bonding portion 105 is located at the center position in the width direction of one surface of the tubular film 100. When the folding form of the tubular film 100 having such an adhesive part 105 is changed by the tetrablock 104, the fold line 100b of the second folding form F2 overlaps with the adhesive part 105 as shown in FIG. become.
The crease 100b may be formed in the adhesive part 105 by the tetrablock 104, but the adhesive part 105 having high rigidity is not easily broken. When the tubular film 100 passes through the tetrablock 104, the crease 100b is formed near the second edge part 142. In some cases, the bonding portion 105 slides in the rotation direction, and the fold line 100b is not formed at an accurate position.

When the fold line 100b is displaced, the mark m position is also displaced as shown in FIG. When the mark m is out of the detection range of the mark sensor 103, the cutting unit 101 does not cut and the line stops. Even if the line does not stop, there is a problem that the detection timing of the mark m is deviated and the end of the printing surface of the cylindrical label 102 is partially cut, resulting in a label defect.
In addition, there exists a thing as described in patent document 1 as a conveyance apparatus of a similar cylindrical film.
JP 2006-76629 A

  The present invention has been made to solve the above-described problems of the prior art, and the object of the present invention is to change the folding form of the tubular film during conveyance to form a new crease. An object of the present invention is to provide a cylindrical film transport device capable of accurately forming a fold at a predetermined position without interfering with an adhesive portion.

In order to achieve the above object, the invention according to claim 1 is a method in which a cylindrical film folded into a flat shape is transported to a cutting portion, and is sequentially cut by a predetermined length and attached to a container body portion. In the middle of the conveyance path, the folded form of the tubular film is changed to the second folded form so that a new fold is formed at a position twisted by a predetermined angle with respect to the fold of the first folded form on the upstream side. Folding means changing means is provided,
The cylindrical film has a configuration in which a sheet-like base film is rolled and bonded in a cylindrical shape, and in the first folding form, the cylindrical film is folded so that the adhesive portion is positioned in the middle in the width direction on one side. In the film transport device,
The folding form changing means is configured to guide the folding form so that the fold line of the second folding form on the downstream side is shifted from the adhesive portion of the tubular film in the width direction. .

In the invention according to claim 2, the folding form changing means is arranged in the cylindrical film, and linearly extends in a direction perpendicular to the conveying direction along the film surface of the first folding form of the cylindrical film. A first edge portion, a second edge portion on the downstream side linearly extending in a direction orthogonal to the transport direction along the film surface of the second folding form, and a tube from the first edge portion toward the second edge portion And a guide portion that gradually expands the tubular film as it moves in the transport direction and guides the tubular film to the second folded form.
The invention according to claim 3 is, in the first folded form, the adhesive portion of the tubular film is located at the center in the width direction of the tubular film, and the twist angle between the first edge portion and the second edge portion is It is characterized in that it is shifted by a predetermined angle by at least the width of the adhesive portion with respect to 90 degrees.
The invention according to claim 4 is characterized in that a mark is attached to the cylindrical film, and the cutting timing is controlled by detecting the mark by a mark sensor.

According to the first aspect of the present invention, the fold in the second folding form is formed at a position shifted in the width direction from the adhesive portion of the tubular film, so that the fold is shifted from the intended position. No crease is formed accurately.
According to invention of Claim 2, since a cylindrical film is guide | induced to a 2nd folding form by a guide part from a 1st edge part to a 2nd edge part, changing a folding form reliably. Can do.
According to the invention described in claim 3, if the second edge portion of the folding form changing means is formed at a position twisted by a predetermined angle from 90 degrees with respect to the first edge portion, the width of the tubular film About a general cylindrical film in which an adhesion part is located in the direction center, a new crease can be shifted from an adhesion part.
According to the invention described in claim 4, since the position of the mark is stabilized, the cutting can be surely performed, the line is not stopped, and the cutting position of the label is not shifted.

The present invention will be described below based on the illustrated embodiments.
FIG. 1 shows a cylindrical film conveying apparatus according to an embodiment of the present invention.
The cylindrical film conveyance apparatus 1 which concerns on this Embodiment is applied to the film conveyance part of the labeler which conveys the cylindrical film used as the base material of the cylindrical label with which a container trunk | drum is mounted | worn similarly to the past. Then, the cylindrical film 2 in the form of being folded into a flat shape is conveyed to the cutting part 3 and cut into a cylindrical label L sequentially by a predetermined length, and the cylindrical label L is expanded and a container body (not shown) It is to be attached to. The cylindrical film 2 is provided with a mark m, and the mark m is detected by the mark sensor 4 so that the cutting timing is controlled. In this embodiment, the cylindrical label L is a stretch label, and the cylindrical film 2 is a stretchable film for stretch labels.

  The tubular film 2 is set in a state of an original roll wound in a roll shape (not shown), and is conveyed from the original roll to a cutting unit 3 through a predetermined conveyance path 20. The cylindrical film 2 has a configuration in which a sheet-like base film is rolled and bonded in a cylindrical shape, and in the initial form (first folded form F1), as shown in FIG. It is located at the center in the width direction on one side. Further, in the illustrated example, the mark m attached to the tubular film 2 is attached at a certain interval in the transport direction of the tubular film 2 along the adhesive portion 2a at a position slightly apart from the adhesive portion 2a in the width direction. ing. The mark m is attached corresponding to each cylindrical label L to be cut. The tubular film 2 is subjected to various printings corresponding to the tubular labels L.

The conveyance path 20 includes an upward conveyance unit 21 extending vertically upward, a horizontal conveyance unit 22 extending horizontally from the upward conveyance unit 21, and a downward conveyance unit 23 extending vertically downward from the horizontal conveyance unit 22.
Guide rolls 12 are provided at the corners of the upward conveyance unit 21 and the horizontal conveyance unit 22 and the corners of the horizontal conveyance unit 22 and the downward conveyance unit 23, and the cylindrical film 2 is wound around the guide rolls 12. The cutting unit 3 is disposed at the lower end of the downward conveying unit 23. In the downward conveying unit 23, a pair of feeding rolls 11 is disposed upstream (upward in the drawing) of the cutting unit 3, and the mark sensor 3 is disposed further upstream (upward in the drawing) of the feeding roll 11. ing. Further, a tension roll 13 that applies tension to the tubular film is appropriately disposed. In the illustrated example, the tension roll 13 is disposed in the upward conveyance unit 21.

In the middle of the conveyance path 20, in this embodiment, the upward conveyance unit 21 newly adds the folded form of the tubular film 2 to a position twisted by a predetermined angle with respect to the fold b 1 of the first folded form F 1 on the upstream side. A tetrablock 5 is provided as a folding form changing means for changing to the second folding form F2 so that the fold line b2 is formed.
The tetrablock 5 is arranged in the tubular film 2 and is a first edge portion 51 that linearly extends in a direction perpendicular to the transport direction along the film surface of the first folded form F1 of the tubular film 2. A second edge portion 52 on the downstream side linearly extending in a direction orthogonal to the transport direction along the film surface of the second folding form F2, and a tube from the first edge portion 51 toward the second edge portion 52 And a guide portion 53 that gradually expands the tubular film 2 and guides it to the second folded form F2 as the film-like film 2 moves in the transport direction.

  The tetra block 5 is a tetrahedron block body having four ridge lines connecting both ends of the first edge portion 51 and both ends of the second edge portion 52, and is formed of, for example, metal, plastic or the like. The guide portion 53 includes a pair of triangular first guide surfaces 531 connecting the three ends of the first edge portion 51 and one end of the second edge portion 52, the both ends of the second edge portion 52, and the first edge portion 51. A pair of triangular second guide surfaces 532 connecting three points at one end of the first guide surface 531, and a boundary portion between the first guide surface 531 and the second guide surface 532 is a ridge line portion 533. The ridge line portion 533 does not need to have a clear shape, and may have a gentle round shape.

  And as shown in FIG.1 (C), the 1st edge part 51 and the fold b2 of the 2nd folding form F2 of the downstream are formed in the position shifted | deviated with respect to the adhesion part 2a in the width direction. An angle between the second edge portions 52 is set. The first edge portion 51 coincides with the film surface of the first folding form F1, and the second edge portion 52 is shifted by a predetermined angle α with respect to the position of the adhesive portion 2a in the first folding form. .

  The center of the first edge portion 51 and the second edge portion 52 is positioned on the central axis of the tubular film 2, and when viewed from the transport direction, as shown in FIG. It has a shape. In this embodiment, in the first folding form F1, the adhesive portion 2a of the tubular film 2 is located at the center in the width direction of the tubular film 2, and the second edge portion 52 is in relation to the first edge portion 51. The deviation angle α is set to about 11 ° with respect to the reference line N having an angle of 90 degrees.

By setting the deviation angle α in this way, the cylindrical label L opens in a rectangular shape with four folds as vertices. When the deviation angle α is large, the interval between the short sides of the opened shape is reduced. It becomes narrow and troubles wearing. Moreover, when the deviation angle is too small, the crease position may be shifted too close to the bonding portion 2a. As a range in which the crease position can be formed accurately and the label mounting operation is not hindered, it is preferable that the misalignment angle α is 20 ° to 5 °, preferably about 15 ° to 10 °.
In this embodiment, the bonding portion 2a is formed at the center in the width direction of the tubular film 2, but the bonding portion 2a may be shifted from the center in the width direction. In short, in the second folding form F2, it is only necessary to guide the folding form so that no crease is formed in the bonding portion 2a.

  Since the tetrablock 5 is only inserted in a floating state in the tubular film 2, a pair of fall prevention rolls 6 are disposed at the lower position of the tetrablock 5 in the upward conveying portion 21. The tubular film 2 of the first folding form F1 is sandwiched from the outside by the roll 6 for preventing the tetrablock 5 from falling. In addition, a pair of lifting prevention plates 7 is arranged on the upper side of the tetra block 5, and the cylindrical film 2 of the second folding form F <b> 2 is sandwiched from the outside by the lifting plates 7, and the tetra block 5 is moved upward. Is regulated.

Next, the operation of the cylindrical film conveyance device of the above embodiment will be described with reference to FIG.
The cylindrical film is conveyed in a first folded form to a position before the tetrablock 5 (see FIG. 3A), and when it reaches the tetrablock 5, the first edge portion 51 of the tetrablock 5 is the first It begins to bite into the inner periphery of the tubular fill 25 of the folding form F1, and gradually expands in accordance with the shape of the guide portion 53 of the tetrablock 5. This expanded shape is expanded into a parallelogram shape (see FIGS. 3B, 3C, and 3D), and finally becomes a second folded form F2 that follows the second edge portion 52. Folded, a crease b2 is additionally formed and conveyed downstream.

Since the fold b2 of the second folding form F2 is formed at a position shifted in the width direction from the adhesive portion 2a of the tubular film 2, the fold b2 is not deviated from the intended position, and the fold b2 is accurately set. Is formed.
The adhesive part 2a has a triangular shape on the film surface side of the first folding form F1 of the guide part 53 until it reaches the second edge part 52 (see FIGS. 3B, 3C, and 3D). It is located on the first guide surface 531 side and moves to the second guide surface 532 side of the second folding form F2 over the ridge line portion 533 before the second edge portion 52.

  Therefore, the position of the mark m in the second folded form is stably formed at a fixed position from the fold line b2, the mark m is reliably detected by the mark sensor 4, and the cylindrical label can be reliably cut, Further, it is possible to prevent a cutting defect such that the cutting position varies and the printed surface is chipped.

In the above embodiment, the tetrablock is used as the folding form changing means, but the invention is not limited to the tetrablock, and the folding form of the tubular film is the same as that of the first folding form on the upstream side. As long as it is changed to the second folding form so that a new crease is formed at a position twisted by a predetermined angle.
Moreover, although the said embodiment demonstrated taking the conveyance of the cylindrical film for stretch labels as an example, it is applicable also to the conveyance of the cylindrical film for shrink labels.

FIG. 1 shows a cylindrical film conveying apparatus according to an embodiment of the present invention. FIG. 1 (A) shows a schematic configuration of a conveying path, and FIG. 1 (B) shows a first folding of the cylindrical film. The partial perspective view which shows a form, and the same figure (C) are the partial perspective views which show the 2nd folding form of a cylindrical film. 2A is a partially enlarged perspective view in the vicinity of the tetrablock of FIG. 1, FIGS. 2B to 5E show the tetrablock, FIG. 2B is a perspective view, FIG. 2C is a front view, D) is a side view, and (E) is a plan view. 3A to 3E are cross-sectional views in a direction orthogonal to the conveyance direction at positions a to e in FIG. 4A and 4B show a conventional film transport apparatus, in which FIG. 4A is a schematic diagram of the transport path, FIG. 4B is a partially enlarged perspective view near the tetra block, and FIG. The perspective view of a block, the figure (D) is a top view of a tetra block, and the figure (E) is a schematic plan view of the state which opened the cylindrical label. FIG. 5A is a perspective view of the vicinity of a tetrablock in the case of a cylindrical film provided with an adhesive portion, and FIG. 5B is a partial perspective view showing a first folded form of the cylindrical film provided with an adhesive portion. FIG. 4C is a partial perspective view showing a second folded form of the tubular film provided with the adhesive portion, and FIG. 4D is a partial perspective view showing a state in which the fold line of the second folded form is displaced from the adhesive portion. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical film conveyance apparatus 2 Cylindrical film 2a Bonding part 3 Cutting part 4 Mark sensor 5 Tetra block (folding form change means)
51 1st edge part 52 2nd edge part 53 Guide part 6 Fall prevention roll 7 Lifting prevention plate 11 Feeding roll 12 Guide roll 13 Tension roll 20 Conveyance path 21 Upward conveyance part 22 Horizontal conveyance part 23 Downward conveyance part F1 First folding Form, b1 crease F2 second fold form, b2 crease α shift angle L cylindrical label m mark

Claims (4)

A cylindrical film folded into a flat shape is transported to a cutting section, cut into a predetermined length sequentially and mounted on a container body, and the folded state of the cylindrical film is placed upstream in the middle of the transport path. Folding form changing means for changing to the second folding form is provided so that a new crease is formed at a position twisted by a predetermined angle with respect to the fold of the first folding form,
The cylindrical film has a configuration in which a sheet-like base film is rolled and bonded in a cylindrical shape, and in the first folding form, the cylindrical film is folded so that the adhesive portion is positioned in the middle in the width direction on one side. In the film transport device,
The folding form changing means is configured to guide the folding form so that the fold line of the second folding form on the downstream side is shifted from the adhesive portion of the tubular film in the width direction. Cylindrical film transport device.   The folding form changing means is disposed in the tubular film, and includes a first edge portion linearly extending in a direction perpendicular to the transport direction along the film surface of the first folding form of the tubular film, and a second edge portion. A second edge portion on the downstream side linearly extending in a direction orthogonal to the transport direction along the folded film surface, and the tubular film moves in the transport direction from the first edge portion toward the second edge portion. The tubular film transport device according to claim 1, further comprising: a guide portion that gradually expands the tubular film and guides the tubular film to a second folded form.   In the first folded form, the adhesive portion of the tubular film is located at the center in the width direction of the tubular film, and the twist angle between the first edge portion and the second edge portion is at least an adhesive portion with respect to 90 degrees. The cylindrical film transport device according to claim 2, wherein the cylindrical film transport device is configured to be shifted by a predetermined angle by the width of. The cylindrical film conveying apparatus according to any one of claims 1 to 3, wherein a mark is attached to the cylindrical film, and the cutting timing is controlled by detecting the mark with a mark sensor. .

Images