JP2009078839A - Separation roller and label printing apparatus equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separation roller which is small in size and prevents an adhesive agent from entering a shaft hole of the roller, and a label printing apparatus equipped with the same. <P>SOLUTION: This separation roller 6 for separating a label from base paper has a rotary shaft 11, a small-diameter part 16 and a roller 12. The roller has a shaft hole 13 where the rotary shaft is inserted, a large-diameter part 15, the small-diameter part 16 and a flange 17. The large-diameter part has an outer peripheral face 21 in parallel with the extending direction of the shaft hole and the base paper B from which a label C is separated is transported while being held between the outer peripheral face 21 and the outer peripheral face of a platen roller 3. The small-diameter part is extended having a diameter smaller than the diameter of the large-diameter part coaxially with the large-diameter part from the end face 18 of the large-diameter part. The flange is extended from an edge 22 apart from the large-diameter part of the small-diameter part in a direction directly crossing the extending direction of the small-diameter part. The end face of the large-diameter part, the outer peripheral face 19 of the small-diameter part and the front face 20 of the flange facing the end face of the large-diameter part form at least one recess 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a peeling roller for peeling a label of a label sheet from a mount and a label printing apparatus including the peeling roller.

  2. Description of the Related Art Conventionally, as a label peeling mechanism of a label printing apparatus, a label paper having a configuration in which a label is affixed to a long continuous mount is fed from a label paper feeding direction to a board discharge direction via a label peeling member. A configuration having a route for guiding while bending at a sharp angle is known. When the mount is transported along such a sharp path, the label attached to the surface is peeled off from the mount due to the strength of the waist and separated and discharged from the label discharge port. Further, the mount after the label is peeled off is conveyed along a discharge path different from the label by the peeling roller and the platen roller.

  Here, a slight amount of the pressure-sensitive adhesive on the label side remains on the surface of the mount after the label is peeled off by the label peeling member, that is, the surface on the side where the label is attached. The surface of the mount on which the adhesive remains remains in contact with the outer peripheral surface of the peeling roller. As a result, there is a possibility that the adhesive remaining on the surface of the backing sheet moves to and adheres to the outer peripheral surface of the peeling roller, and further wraps around both ends of the peeling roller (the side where the outer peripheral surface of the rotating shaft is exposed) from this outer peripheral surface. is there.

  A shaft hole is formed in the peeling roller, and the rotation shaft of the peeling roller is fitted in this shaft hole. As described above, the adhesive that has entered the both end sides of the peeling roller enters the shaft hole from the both end surfaces of the peeling roller along the outer peripheral surface of the rotating shaft. Then, the adhesive roller adheres to the inner peripheral surface of the shaft hole of the peeling roller and the outer peripheral surface of the rotating shaft, so that the peeling roller and the rotating shaft are fixed. Thereby, the smooth rotation of the peeling roller is hindered. As a result, the operation failure of the peeling roller is induced, thereby causing a shift in the printing position and failing to satisfy the required performance as the label printing apparatus. Therefore, it is necessary to remove the adhesive adhered to the surfaces of both members in order to prevent the peeling roller and the rotating shaft from sticking to each other. Since it is normal to use a cleaning pen or a cleaning agent for the removal, it also takes time to clean and remove the adhesive.

An example of a method for solving this problem is disclosed in the peeling roller of the label printing apparatus of Patent Document 1 shown in FIG. In the peeling roller 15, the roller main body portion 32 is formed of silicon rubber to which an adhesive does not easily adhere, and a raised step a is provided between the roller main body portion 32 and both end portions 35 and 36. . Furthermore, the axial length b of the both end portions 35 and 36 of the roller body portion 32 is sufficiently taken. Thereby, even if it is a case where an adhesive wraps around to the outer peripheral surface of both ends 35 and 36, an adhesive does not approach into the shaft hole 37. Thereby, the peeling roller 15 and the roller shaft 31 are not fixed.
JP 2007-062839 A

  However, the peeling roller disclosed in Patent Document 1 in FIG. 3 is provided at both end portions of the roller main body for the purpose of increasing the moving distance of the adhesive from the vicinity of the center of the roller main body of the peeling roller to the shaft hole entrance. Large length. Further, for the same purpose, a raised step is provided between the roller body portion and both ends. With these configurations, the peeling roller is increased in size in the longitudinal direction.

  The present invention has been made in view of the above circumstances, and is capable of preventing the adhesive from entering the shaft hole of the peeling roller and reducing the size of the peeling roller and the label printing apparatus including the same. The purpose is to provide.

  A peeling roller according to an aspect of the present invention is a peeling roller that peels a label from a mount, and includes a rotation shaft, a shaft hole into which the rotation shaft is inserted, and an outer peripheral surface parallel to the extending direction of the shaft hole. A large-diameter portion that conveys the backing sheet with the label peeled between the outer peripheral surface and the outer peripheral surface of the platen roller, and is smaller than the diameter of the large-diameter portion coaxially with the large-diameter portion from the end surface of the large-diameter portion A roller portion having a small-diameter portion extending with a diameter and a flange portion extending from an edge away from the large-diameter portion of the small-diameter portion in a direction orthogonal to the extending direction of the small-diameter portion, At least one concave portion is formed by the end surface of the diameter portion, the outer peripheral surface of the small diameter portion, and the surface of the collar portion facing the end surface.

  The label printing apparatus of one embodiment of the present invention includes the above-described peeling roller and the above-described platen roller.

  According to the peeling roller of the present invention and the label printing apparatus provided with the peeling roller, at least one recess is formed by the end surface of the peeled large diameter portion, the outer peripheral surface of the small diameter portion, and the surface of the collar portion facing the end surface. ing. As a result, the adhesive transferred from the mount to the outer peripheral surface of the large-diameter portion of the roller portion does not flow out to the side where the outer peripheral surface of the rotating shaft is exposed beyond the flange portion of the recess. For this reason, the adhesive does not enter the shaft hole of the peeling roller. Furthermore, since the concave portion is formed in the peeling roller, it is not necessary to increase the length of the roller portion in the direction parallel to the rotation axis. Thereby, a peeling roller is reduced in size. Accordingly, it is possible to provide a peeling roller that can prevent the pressure-sensitive adhesive from entering the shaft hole of the peeling roller and can be miniaturized, and a label printing apparatus including the peeling roller.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out a peeling roller of the present invention and a label printing apparatus including the same will be described in detail with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view showing a label printing apparatus according to an embodiment of the present invention. The label printing apparatus 1 includes a thermal head 2, a platen roller 3, a support roller 4, a peeling member 5, and a peeling roller 6.

  The thermal head 2 performs printing on the label C of the conveyed label paper A by a thermal method. The thermal head 2 is disposed so as to face the platen roller 3 on the upper side, for example. The thermal head 2 is provided so as to be movable toward and away from the platen roller 3, and is pressed by an elastic member (not shown) to be in contact with the outer peripheral surface of the platen roller 3.

  The platen roller 3 carries the mount B in cooperation with the peeling roller 6. The support roller 4 is provided at a position facing the peeling member 5 in order to keep the transport direction of the mount B and the label C appropriately.

The peeling member 5 peels the label C from the mount B of the label paper A. Peeling member 5 is disposed on the downstream side of the label paper conveying direction D _a the platen roller 3. Peeling member 5 has a top surface (not shown) for guiding receiving label paper A to be conveyed, the upper surface of the label paper conveying direction D _a downstream label paper bent into a steep angle toward the lower side from the end A mount And a lower surface (not shown) for guiding B.

  The peeling roller 6 peels off the label C from the mount B by rotating around the rotation shaft 11 and conveys the mount B with the mount B interposed therebetween. The peeling roller 6 is opposed to the lower side of the platen roller 3 and is arranged so that both rotation shafts 11 are parallel to each other. The peeling roller 6 is rotatably supported by a bearing (not shown) at both ends of a rotating shaft 11 that supports the peeling roller 6. In addition, a force is applied to each of the bearings so as to approach the platen roller 3 by an unillustrated elastic member. For this reason, the peeling roller 6 is provided so as to be movable along a direction approaching and separating from the platen roller 3. Thereby, the peeling roller 6 is always pressed toward the platen roller 3, and the outer peripheral surface thereof is in contact with the outer peripheral surface of the platen roller 3. That is, the peeling roller 6 rotates according to the rotation of the platen roller 3 by frictional contact with the platen roller 3. Further, the peeling roller 6 sandwiches the mount B together with the platen roller 3, and conveys the mount B in the mount discharge direction. Note that the platen roller 3 and the peeling roller 6 are made of rubber, for example, and are configured to rotate in cooperation with each other by being surely brought into frictional contact.

  Next, the peeling roller 6 will be described in detail with reference to FIG. FIG. 2 is a schematic side view showing the peeling roller of FIG.

  The peeling roller 6 has a rotating shaft 11 and a roller portion 12. The outer peripheral surface of the rotating shaft 11 and the inner peripheral surface of the roller part 12 are fitted.

  The roller portion 12 includes a shaft hole 13, a large diameter portion 15, a small diameter portion 16, and a flange portion 17, and the roller portion 12 is integrally formed.

  The large-diameter portion 15 has an outer peripheral surface parallel to the extending direction of the shaft hole 13 into which the rotating shaft 11 is inserted, and has a cylindrical shape. Further, the large-diameter portion 15 conveys the mount B to the paper discharge mechanism side with the mount B from which the label C has been peeled sandwiched between the outer peripheral surface and the outer peripheral surface of the platen roller 3.

  The small diameter portion 16 is provided on both left and right end surfaces 18 of the large diameter portion 15. Further, the small-diameter portion 16 has a diameter smaller than the diameter of the large-diameter portion 15 coaxially with the large-diameter portion 15 and extends in a direction parallel to the rotary shaft 11 from the left and right end surfaces 18. Thereby, the small diameter part 16 has a cylindrical shape like the large diameter part 15.

  The flange portion 17 is provided on the left and right edge portions 22 apart from the large diameter portion 15 of the small diameter portion 16. Further, the flange portion 17 extends from the left and right edge portions 22 of the small diameter portion 16 in a direction orthogonal to the extending direction of the small diameter portion 16 (direction parallel to the rotation shaft 11). Thereby, the collar part 17 has disk shape. Further, the flange portion 17 having a disk shape has a diameter smaller than the diameter of the large diameter portion 15. Thereby, the collar part 17 becomes a structure which the outer peripheral surface does not contact with the surface of the mount to be conveyed.

  As shown in FIG. 2, two concave portions 14 are formed by the end surface 18 of the large diameter portion 15, the outer peripheral surface 19 of the small diameter portion 16, and the surface 20 of the flange portion 17 facing the end surface 18 of the large diameter portion 15. Is formed. In addition, although the recessed part 14 shown by FIG. 2 is each provided in the right and left of the large diameter part 15, it is not limited to this form. That is, the recess 14 may be provided on either the left or right side of the large diameter portion 15.

  At least one of the end surface 18 of the large-diameter portion 15, the outer peripheral surface 19 of the small-diameter portion 16, and the surface 20 of the flange portion 17 facing the end surface 18 of the large-diameter portion 15 has an uneven portion such as a groove. You may do it. In the form in which the pressure-sensitive adhesive adheres to the surface of the concavo-convex portion, the surface area increases compared to the case where all of these surfaces are curved surfaces having no concavo-convex portions. Thereby, the accommodation volume of the adhesive in the recessed part 14 can be increased because the adhesion area to the surface of an adhesive can be expanded.

  When the mount B is transported by the peeling roller 6 and the platen roller 3, the surface of the mount B and the outer peripheral surface 21 of the large-diameter portion 15 of the peeling roller 6 come into contact with each other. As a result, the pressure-sensitive adhesive attached to the surface of the mount B moves to and adheres to the outer peripheral surface 21 of the large-diameter portion 15. For example, as the rotating shaft 11 is rotated by driving means such as a motor, a centrifugal force acts on the adhesive attached to the outer peripheral surface in the radially outward direction of the cylindrical large-diameter portion 15. Further, the contact between the board B to be transported and the peeling roller 6 urging the carrying of the board B causes a force to press from the board B side to the peeling roller 6 side. When the centrifugal force and the pressing force act on the adhesive, the adhesive gradually moves on the outer peripheral surface 21 of the large-diameter portion 15 toward both end portions of the outer peripheral surface (in the direction of the small-diameter portion 16). The pressure-sensitive adhesive that has traveled along the outer peripheral surface 21 of the large-diameter portion 15 reaches its end surface 18. Further, the adhesive reaches the outer peripheral surface 19 of the small diameter portion 16 after passing through the end surface 18. As the peeling roller 6 further rotates, it reaches the edge 22 of the outer peripheral surface 19 of the small diameter portion 16 and then reaches the surface 20 of the flange portion 17.

  However, the flange portion 17 is provided in a direction orthogonal to the extending direction of the small diameter portion 16 (a direction orthogonal to the rotation shaft 11). Therefore, the flange portion 17 functions as a defense wall that restricts the flow of the adhesive from the recess 14 to the side where the outer peripheral surface of the shaft is exposed. Thus, the adhesive that has reached the surface 20 of the flange portion 17 does not flow out to the side where the outer peripheral surface of the shaft is exposed beyond the flange portion 17 including this surface and having a certain height. Therefore, since the adhesive does not flow out to the side where the outer peripheral surface of the shaft is exposed, the adhesive does not enter the shaft hole along the outer peripheral surface of the rotating shaft. Furthermore, since the concave portion is formed in the peeling roller, it is not necessary to increase the length of the roller portion in a direction parallel to the rotation axis. Thereby, a peeling roller can be reduced in size.

  Further, the adhesive transferred from the mount to the large diameter portion of the roller portion is accommodated in the recess. Therefore, the cleaning and removal of the pressure-sensitive adhesive concentrated in one place is easier than the form in which the pressure-sensitive adhesive is dispersed and accommodated in several places.

It is a schematic sectional drawing which shows the label printing apparatus which concerns on one Embodiment of this invention. It is a schematic side view which shows the peeling roller which concerns on one Embodiment of this invention. It is sectional drawing which shows the conventional peeling roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Label printing apparatus 3 Platen roller 6 Peeling roller 11 Rotating shaft 12 Roller part 13 Shaft hole 14 Recessed part 15 Large diameter part 16 Small diameter part 17 Edge part 18 End surface 19 Outer surface 20 Surface 21 Outer surface 22 Edge B Mount C Label

Claims (4)

A peeling roller for peeling the label from the mount,
A rotation axis;
The mount having the shaft hole into which the rotating shaft is inserted and the outer peripheral surface parallel to the extending direction of the shaft hole, and the label peeled between the outer peripheral surface and the outer peripheral surface of the platen roller. A large-diameter portion that conveys the mount, a small-diameter portion that extends coaxially with the large-diameter portion from the end surface of the large-diameter portion and has a diameter smaller than the diameter of the large-diameter portion, and an extending direction of the small-diameter portion A roller portion provided with a flange portion extending from an edge portion of the small diameter portion away from the large diameter portion in a direction orthogonal to
Have
At least one recess is formed by the end surface of the large-diameter portion, the outer peripheral surface of the small-diameter portion, and the surface of the flange portion facing the end surface.
Peeling roller.   The two outer peripheral surfaces of the two small-diameter portions extending from the both end surfaces with a diameter smaller than the diameter of the large-diameter portion coaxially with the large-diameter portion from the both end surfaces; 2. The peeling roller according to claim 1, wherein two concave portions are formed by the two surfaces of the flange portion facing the both end surfaces.   The peeling roller according to claim 1 or 2, wherein at least one of the end surface, the outer peripheral surface, and the surface has an uneven portion. The peeling roller according to any one of claims 1 to 3,
The platen roller;
A label printing apparatus.

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