JP6173208B2 - Cutter unit for roll labeler - Google Patents

Description

  The present invention relates to a cutter unit for cutting a label supplied to a roll labeler into a predetermined length.

  2. Description of the Related Art A roll labeler that sticks a label in a roll shape on a peripheral surface of a bottle, for example, a resin bottle is widely used. In the prior art, the roll labeler includes a vacuum roller that sucks and affixes a continuous label to the peripheral surface thereof, and a cutter roller that is disposed opposite the vacuum roller and includes a cutter unit. The cutter roller rotates in synchronization with the vacuum roller, so that the cutter unit can cut the label into a predetermined length.

  In order to cut the label, the cutter blade of the cutter unit protrudes from the peripheral surface of the vacuum roller by a predetermined length. When this protrusion length is large, the cutter blade strongly contacts the vacuum roller, so that the tip of the cutter blade is worn in a short period of time. On the other hand, if the predetermined length is too short, the tip of the cutter blade does not reach the vacuum roller, and the label cannot be cut appropriately.

  For this reason, in Patent Document 1 and Patent Document 2, an elastic body is disposed between the cutter base to which the cutter blade is attached and the unit base of the cutter unit. Since the elastic body automatically adjusts the protruding length of the cutter blade, the label can be cut well over a long period of time.

Japanese Patent Laid-Open No. 11-77586 JP 2009-137005 JP

  However, in Patent Document 1, the elastic body is located immediately after the cutter blade. In other words, the cutter blade in Patent Document 1 is arranged coaxially with the axis of the coil spring that is an elastic body. In such a case, the elastic force exerted on the cutter blade by the elastic body is too strong, and the projection length of the cutter blade cannot be adjusted appropriately, and the life of the cutter blade is reduced.

  Patent Document 2 discloses two elastic bodies. The edge of one elastic body is disposed substantially adjacent to and perpendicular to the axis of the cutter blade, and the other elastic body is disposed substantially parallel to the cutter blade. When two elastic bodies are provided in this way, it is difficult and complicated to adjust the elastic force of each elastic body.

  Furthermore, the elastic forces of the two elastic bodies disclosed in Patent Document 2 act separately on the cutter blade. For this reason, when cutting the label, the tip of the cutter blade becomes unstable and slightly swings, which may cause a situation where the label cannot be cut appropriately.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a cutter unit for a roll labeler that can easily adjust the elastic force of an elastic body and extend the life of the cutter blade. .

In order to achieve the above-described object, according to a first invention, in a cutter unit of a roll labeler, a unit table, a cutter table provided with a cutter blade, and a first gap between the cutter table and the unit table are provided. There is provided a cutter unit comprising: a bolt that attaches the cutter table to the unit table while being vacant; and an elastic body that is disposed around the bolt and coaxially with the bolt in the first gap.
According to a second aspect, in the first aspect, the cutter blade is attached to a side portion of the cutter base in a biased manner from the bolt.
According to a third aspect, in the first aspect, a second gap is formed between the outer peripheral surface of the bolt and the cutter base.

In the first invention, since the elastic body is arranged coaxially with the bolt, the elastic force of the elastic body can be adjusted by adjusting the bolt. For this reason, the protrusion length of a cutter blade can be adjusted appropriately and easily. Accordingly, it is possible to prevent an excessive elastic force from being applied to the cutter blade, and it is possible to extend the life of the cutter blade.
In the second invention, since the cutter blade is arranged so as to be offset from the bolt, the elastic force of the elastic body does not act directly on the cutter blade, and therefore the protrusion length of the cutter blade can be appropriately and easily adjusted. It can be adjusted and the life of the cutter blade can be further extended.
In the third aspect of the invention, since the second gap exists, the cutter blade can be moved more easily in the radial direction and the circumferential direction of the bolt.

It is a perspective view of the roll labeler containing the cutter unit based on this invention. It is a cross-sectional view of a cutter unit. It is the side view which looked at the cutter unit from one side. It is the other side view which looked at the cutter unit from the other side. It is a cross-sectional view of the cutter unit taken along line AA in FIG. 3A. It is a cross-sectional view of the cutter unit taken along line BB in FIG. 3B. It is a 1st figure which shows that a cutter blade cut | disconnects a label. It is a 2nd figure which shows that a cutter blade cut | disconnects a label. It is a 3rd figure which shows that a cutter blade cut | disconnects a label.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following drawings, the same members are denoted by the same reference numerals. In order to facilitate understanding, the scales of these drawings are appropriately changed.
FIG. 1 is a perspective view of a roll labeler including a cutter unit according to the present invention. The roll labeler 1 is used to attach a label 9 to a container C (not shown). The container C is a bottle, a can, or a resin container, for example, a PET bottle, and the cross section of the container C may be circular or rectangular. Furthermore, the roll labeler 1 of the present invention may be attached to the container C that is already filled with contents such as beverages and already sealed with a cap, or the label 9 may be attached to the empty container C. Good.

  As shown in FIG. 1, the roll labeler 1 includes a feed roller 2 that feeds a continuous label 9, and a pressure roller 3 that is disposed to face the feed roller 2. A cutter unit 4 and a vacuum roller 5 are arranged opposite to each other downstream of the feed roller 2 and the pressure roller 3 in the feeding direction of the label 9. Further, a transport drum 6 is disposed downstream of the cutter unit 4 and the vacuum roller 5.

  As shown in FIG. 1, the cutter blade 49 included in the cutter unit 4 extends parallel to the rotation axis of the cutter unit 4. A plurality of openings 5 a are formed at equal intervals on the peripheral surface of the vacuum roller 5. The plurality of openings 5a are connected to a vacuum source (not shown). Further, the transport drum 6 includes a plurality of suction portions 6a arranged at equal intervals. A plurality of openings connected to a vacuum source (not shown) are formed on the surfaces of these suction portions 6a.

  As can be seen from FIG. 1, the continuous label 9 is pressed between the feed roller 2 and the pressure roller 3 and is sent out between the cutter unit 4 and the vacuum roller 5 by the rotation of these rollers. The delivered label 9 is sucked and held on the peripheral surface of the vacuum roller 5 by the plurality of openings 5 a of the vacuum roller 5.

  The cutter unit 4 and the vacuum roller 5 rotate in synchronism with the transport drum 6. Therefore, when the label 9 passes between the cutter unit 4 and the vacuum roller 5, the continuous label 9 is cut to a predetermined length by the cutter blade 49 of the cutter unit 4.

  When the cut label 9 is supplied to the vicinity of the conveyance drum 6 by the vacuum roller 5, the label 9 is delivered from the vacuum roller 5 to the conveyance drum 6. As shown in FIG. 1, the label 9 is held so that both ends thereof are sucked by the suction part 6 a of the transport drum 6.

  Then, the transport drum 6 supplies the label 9 to a gluing device (not shown). The label 9 to which a predetermined amount of adhesive has been applied is wound around the peripheral surface of the container C in a roll shape by the gluing device.

  FIG. 2 is a cross-sectional view of the cutter unit. The cutter unit 4 shown in FIG. 2 has a substantially octagonal cross section, and is configured to be rotatable around the rotation axis O. The cutter unit 4 includes a unit base 41 that can be a base of the cutter unit 4, and a plurality of parts are assembled to the unit base 41 to constitute the cutter unit 4 shown in FIG. 2.

  As shown in FIG. 2, a cutter table support portion 42 that supports the cutter table 43 is assembled to the unit table 41. The cutter base support part 42 and the cutter base 43 are members having a substantially L-shaped cross section composed of two leg parts. In FIG. 2, the cutter table support part 42 and the cutter table 43 are arranged so that the inner surface of one leg part of the cutter table support part 42 extending upward faces the end surface of one leg part of the cutter table 43 extending horizontally. Has been placed. And the end surface of one leg part of the cutter base support part 42 and the inner surface of one leg part of the cutter base 43 are substantially the same plane.

  A through hole 43 a is formed in one leg portion of the cutter table 43. Then, the first bolt 51 is passed through the through hole 43a, and the cutter base 43 is attached to a through hole 42a of the cutter base support part 42 (see FIG. 4A described later).

  As can be seen from FIG. 2, a first gap G <b> 1 is formed between the cutter table support 42 and the cutter table 43. In the first gap G1, a ring-shaped elastic body 44, for example, a disc spring, is disposed. As illustrated, the first bolt 51 passes through the center hole of the elastic body 44. In other words, the elastic body 44 is arranged coaxially with the first bolt 51 around the first bolt 51. Further, as shown in FIG. 2, a predetermined second gap G <b> 2 is formed between the through hole 43 a of the cutter base 43 and the outer peripheral surface of the first bolt 51.

  A cutter blade 49 is attached to the outer surface of the other leg portion of the cutter base 43 extending upward by a second bolt 52. The cutter blade 49 is attached such that its tip protrudes from the side surface of the cutter unit 4 by a predetermined length. Finally, the lid 48 is assembled to the unit base 41 with the fifth bolt 55. Thereby, the cutter unit 4 having a substantially octagonal cross section as shown in FIG. 2 is created.

  As can be seen from FIG. 2, in the present invention, the cutter blade 49 is located on the center line of the cutter unit 4. The elastic body 44 is not located immediately after the cutter blade 49 (directly below the cutter blade 49 in FIG. 2), and the elastic body 44 is disposed at a location deviated from the axis of the cutter blade 49. For this reason, the elastic force of the elastic body 44 does not directly act on the cutter blade 49 during use. As a result, the life of the cutter blade 49 can be extended.

  3A is a side view of the cutter unit as seen from one side, and FIG. 3B is another side view of the cutter unit as seen from the other side. 4A is a cross-sectional view of the cutter unit taken along line AA in FIG. 3A, and FIG. 4B is a cross-sectional view of the cutter unit taken along line BB in FIG. 3B. For the sake of brevity, the cutter blade 49 and bolts are not shown in FIGS. 3A and 3B. Similarly, the cutter blade 49 is not shown in FIGS. 4A and 4B.

  As shown in FIG. 3A, a plurality of through holes 42 b are formed at equal intervals on the side surface of the cutter table support portion 42. As shown in FIG. 4B, a third bolt 53 is inserted into each of the through holes 42 b to fix the cutter table support portion 42 to the unit table 41.

  As can be seen from FIGS. 3A and 4B, a plurality of recesses 42 c are formed above the through hole 42 b on the outer surface of one arm of the cutter base support 42. As can be seen from FIG. 3A, the number of the plurality of recesses 42c is smaller than the number of the through holes 42b. However, the same number of the plurality of recesses 42c and through holes 42b may be formed.

  As shown in FIGS. 4A and 4B, a fourth bolt 54 is inserted into each of the plurality of recesses 42c. The tip of the fourth bolt 54 is in contact with the end surface of one arm of the cutter base 43. As can be seen again with reference to FIG. 1, a predetermined third gap G <b> 3 is formed between the inner surface of one leg portion of the cutter table support portion 42 and the end surface of one leg portion of the cutter table 43. ing. These fourth bolts 54 serve to finely adjust the positions of the cutter base 43 and the cutter blade 49 in the radial direction of the first bolt 51 within the range of the third gap G3.

  Further, referring to FIG. 3B, a plurality of through holes 48 a are formed at equal intervals on the side surface of the lid portion 48. As can be seen by comparing FIG. 3A and FIG. 3B, the spacing between the plurality of through holes 48 a is equal to the spacing between the plurality of through holes 42 b formed in the cutter table support portion 42. Each of the plurality of through holes 48a is formed at a position corresponding to the center between two adjacent through holes 42b. In other words, the through holes 48a and the through holes 42b are formed alternately. As can be seen from FIG. 4A, the fifth bolt 55 is inserted into the through hole 48 a to fix the lid 48 to the unit base 41.

  5A to 5C are diagrams showing the cutter blade cutting the label. 5A to 5C, only the vacuum roller 5, the cutter base 43 of the cutter unit 4, the elastic body 44, and the cutter blade 49 are illustrated for the sake of brevity. The axis A in FIGS. 5A to 5C is the central axis of the first bolt 51.

  In FIG. 5A, the continuous label 9 is conveyed counterclockwise while being sucked by the peripheral surface of the vacuum roller 5. At this time, the cutter unit 4 rotates clockwise in synchronization with the vacuum roller 5. As shown in FIG. 5A, immediately before the label 9 is cut, the axis of the cutter blade 49 is somewhat inclined with respect to the radial direction of the vacuum roller 5. Further, the elastic body 44 is not elastically deformed and maintains the original outer shape.

  As shown in FIG. 5B, when the cutter unit 4 and the vacuum roller 5 further rotate in the opposite directions, the tip of the cutter blade 49 of the cutter unit 4 contacts the label 9 and cuts the label 9. At the time of cutting, the axis of the cutter blade 49 is approximately equal to the radial direction of the vacuum roller 5. After the label is cut, the cutter blade 49 is separated from the vacuum roller 5 as shown in FIG. 5C.

  Referring to FIG. 5B again, at the time of cutting, the cutter blade 49 comes into contact with the label 9 and the vacuum roller 5 to receive a pressing force, and the elastic body 44 is elastically deformed. In FIG. 5B, the upstream peripheral surface of the elastic body 44 is more elastically deformed than the downstream peripheral surface in the rotation direction of the cutter unit 4, and the dimension thereof is small. As can be seen from FIG. 5C, the elastic body 44 returns to its original shape after cutting.

  In the present invention, since the elastic body 44 is deformed as described above at the time of cutting, the protruding length of the cutter blade 49 is automatically adjusted, and the pressing force from the vacuum roller 5 can be adjusted. For this reason, it becomes possible to extend the life of the cutter blade 49.

  Furthermore, as described above, the second gap G <b> 2 is formed between the through hole 43 a of the cutter base 43 and the outer peripheral surface of the first bolt 51. Therefore, at the time of cutting, the cutter base 43 and the cutter blade 49 are movable in the radial direction and the circumferential direction of the first bolt 51. For this reason, the force applied to the cutter blade 49 by the elastic body 44 becomes more appropriate, and the life of the cutter blade 49 can be further extended.

  In the present invention, since the first bolt 51 and the elastic body 44 are coaxially arranged, the elastic force in the radial direction of the elastic body 44 can be adjusted by adjusting the first bolt 51. It is. For this reason, the protrusion length of the cutter blade 49 can be adjusted appropriately and easily. Accordingly, it is possible to prevent an excessive elastic force from being applied to the cutter blade, and it is possible to extend the life of the cutter blade.

  In the embodiment described with reference to the drawings, the unit table 41 and the cutter table support part 42 are separate members. However, it is obvious to those skilled in the art that the unit base 41 and the cutter base support portion 42 may be integrally formed, and even in that case, the same effect as described above can be obtained. Will.

DESCRIPTION OF SYMBOLS 1 Roll labeler 2 Feed roller 3 Pressure roller 4 Cutter unit 5 Vacuum roller 5a Opening part 6 Conveying drum 6a Suction part 9 Label 41 Unit base 42 Cutter base support part 42a Through hole 42b Through hole 42c Recess 43 Cutter base 43a Through hole 44 Elastic body 48 Lid 48a Through hole 49 Cutter blade 51 First bolt 52 Second bolt 53 Third bolt 54 Fourth bolt 55 Fifth bolt G1 First gap G2 Second gap G3 Third gap

Claims (3)

In the roll labeler cutter unit,
A unit base,
A cutter table with a cutter blade;
A bolt for attaching the cutter table to the unit table while leaving a first gap between the cutter table and the unit table;
A cutter unit comprising: an elastic body arranged coaxially with the bolt around the bolt in the first gap.   The cutter unit according to claim 1, wherein the cutter blade is attached to a side portion of the cutter table so as to be offset from the bolt.   The cutter unit according to claim 1, wherein a second gap is formed between an outer peripheral surface of the bolt and the cutter table.

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