JP4494826B2 - Bonding roller and label bonding device - Google Patents

Description

  The present invention relates to a laminating roller and a label laminating apparatus, in particular, when a protective label is affixed to an adherend composed of an information recording medium having a substantially donut shape in plan view, such as an optical disk, and there is no mixing of bubbles, and The present invention relates to a laminating roller and a label laminating apparatus that can prevent warpage deformation of an adherend.

  When sticking a label using an optical disk as an adherend, for example, as shown in FIG. 6, a protective label L is arranged or supplied on the upper surface side of the adherend W supported by suction on the table T, It is known to perform by applying a pressing force with a bonding roller R that rotates and moves along the upper surface of the adherend W. Here, the bonding roller R is configured by disposing an elastic member 51 on the outer peripheral surface of a roller body 50 having an axial shape. The elastic member 51 is made of a sheet material such as urethane or rubber, and is provided in a substantially donut shape in which the planar shape when unfolded substantially matches the planar shape of the label L. Accordingly, the label L is bonded to the upper surface of the adherend W while receiving the pressing force via the elastic member 51 by moving the bonding roller R in the direction of arrow A in FIG. 6 while rotating. Become.

The bonding is performed by the bonding roller R moving from the outer peripheral portion of the adherend W through the central portion toward the outer peripheral portion on the opposite side, that is, toward the diameter direction of the adherend W. Therefore, the contact area between the bonding roller R and the adherend W (strictly speaking, indirect contact because the label L exists in the middle) is minimum at the bonding start time and the bonding end time. Thus, the middle point of bonding becomes the substantially maximum contact area.
Therefore, since the surface pressure applied to the surface of the adherend W changes with a change in the contact area, the surface pressure by the bonding roller R with respect to the central portion of the adherend W is relatively reduced. Become. This will be described in more detail with reference to FIG. 7. As shown in FIG. 7A, the contact area at the start of bonding is set to a, while as shown in FIG. When the contact area is 5a and the pressing force F is constant, the former surface pressure is F / a, while the latter surface pressure is F / 5a. Therefore, the surface pressure at the time of bonding is 1/5 of the surface pressure at the time of starting bonding, and due to insufficient surface pressure, bonding failure such as air mixing or warping deformation of the adherend W after tape bonding is caused. It will be a factor to cause.

  Such a problem can be solved, for example, by adjusting the pressing force of the bonding roller as shown in Patent Document 1. The same document discloses a configuration in which the pressing force by the bonding roller is variable via a motor or the like, and the pressing force at the above-described intermediate bonding point is relatively increased. According to this, for adherends having a substantially donut shape or a disk-like planar shape, the starting point of bonding is minimized, the pressing force is gradually increased, the intermediate point is substantially maximized, and then the pressing force is gradually reduced. By doing so, the surface pressure can be kept constant according to the change of the contact area, and partial surface pressure deficiency can be avoided.

JP 2003-19755 A

However, the configuration disclosed in Patent Document 1 includes a motor or the like as an essential configuration, and the structure becomes complicated, and special control is required, which causes an increase in the cost of the bonding apparatus and is economical. There is an inconvenience that it is inferior.
Moreover, when the said bonding roller R provides pressing force to the to-be-adhered body W, rotating on the label, by the reaction force, as shown in FIG.7 (C), the outer periphery of the elastic member 51 There is a tendency that 51A and the inner peripheral edge 51B are deformed so as to escape along the surface direction, and there is a disadvantage that the pressing force in the label outer peripheral area and the inner peripheral area becomes insufficient.

[Object of invention]
The present invention has been devised by paying attention to such inconveniences, and the purpose of the present invention is to maintain a substantially constant surface pressure on the adherend without using a driving means such as a motor and to perform bonding accurately. It is providing the bonding roller and label bonding apparatus which can be performed.
Another object of the present invention is to provide a laminating roller and a label laminating apparatus that can eliminate insufficient surface pressure in the edge region of the label.

In order to achieve the above-mentioned object, in a laminating roller that applies a pressing force while rotating on a label supplied to the upper surface of an adherend disposed on a table in a state where the contact area changes,
An axial roller body, an elastic member disposed on the outer peripheral side of the roller body and in contact with the upper surface of the label , and an unfolded planar shape that is substantially the same as the label, and an adjacent region of the elastic member A configuration is adopted in which the elastic member is disposed discontinuously and is provided discontinuously with the elastic member for adjusting the surface pressure in contact with the upper surface of the table around the adherend.

  In the present invention, the roller body includes a receiving portion for the elastic member and the elastic member for adjusting the surface pressure on an outer peripheral surface, and the elastic member received in the receiving portion and the surface of the elastic member for adjusting the surface pressure are the rollers. It is comprised so that it may be located in a radial direction outer side from the outer peripheral surface of a main body.

Further, the adherend is an information recording substrate having a substantially donut shape in plan view,
The elastic member is provided in a substantially donut shape corresponding to the planar shape of the adherend,
The elastic member for adjusting the surface pressure is composed of an outer surface pressure adjusting member located outside the outer side of the elastic member and an inner surface pressure adjusting member located inside the inner periphery of the elastic member.

Furthermore, the present invention includes a table that supports the adherend and a bonding roller disposed above the table, and is disposed on the adherend while the bonding roller rotates in a state where the contact area changes. In the label laminating device that presses the label to be
The table has an upper surface shape in which the upper surface of the adherend and the upper surface around the adherend are substantially flush with the adherend being supported,
The laminating roller has an axial roller body, an elastic member disposed on the outer peripheral side of the roller body and in contact with the upper surface of the label, and a flat shape in a developed state substantially the same as the label, and the elasticity A surface pressure adjusting elastic member disposed in a region adjacent to the member and discontinuously provided with the elastic member and in contact with the upper surface of the table around the adherend is configured.

  In this specification, the “label” is used to form an information recording pit using energy ray curing in addition to a protective label bonded to protect a recording layer or the like on an adherend such as a disk. Including the label or sheet.

According to the present invention, even if the set pressing force when the bonding roller presses the upper surface of the adherend through the label is kept constant, a substantially constant surface pressure is always generated on the upper surface of the adherend. Become. Therefore, even if the adherend has a substantially donut shape such as a disk, and the contact area with the laminating roller changes at the time of laminating, the laminating can be performed accurately and the pressing force is variably adjusted. The configuration of the motor can be simplified by removing the motors and programs.
In addition, by adopting a configuration in which the elastic member and the elastic member for adjusting the surface pressure are received in the receiving portion of the roller body, the elastic member is deformed so as to escape along the surface direction when subjected to a reaction force by pressing. Can be effectively suppressed, and it is possible to prevent air bubbles from being mixed due to partial lack of pressing force when the deformation occurs.

  The adherend in the present invention is not limited to a member such as an optical disk. For example, when a label is bonded to a substantially rectangular adherend, the present invention can be applied even when the bonding roller moves while rotating in a diagonal direction of the adherend.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In FIG. 1, the schematic perspective view of the bonding roller R which concerns on this embodiment is shown, and the longitudinal cross-sectional view is shown by FIG. Moreover, the principal part disassembled perspective view of the label bonding apparatus is shown by FIG. 3, and the disassembled perspective view of FIG. 3 is shown by FIG. In these drawings, the laminating roller R includes an axial roller body 10, an elastic member 11 disposed on the outer periphery of the roller body 10, and an outer surface pressure adjusting member constituting a surface pressure adjusting elastic member 12. 12A and the inner surface pressure adjusting member 12B.

  As shown in FIGS. 2 and 4, the roller body 10 has first to third shapes configured to receive the elastic member 11, the outer surface pressure adjusting member 12 </ b> A, and the inner surface pressure adjusting member 12 </ b> B on the outer peripheral surface thereof. Receiving portions 14, 15, and 16 are formed through the partition portions 17 and 18, respectively, so that the elastic member 11, the outer surface pressure adjusting member 12A, and the inner surface pressure adjusting member 12B are provided in a discontinuous state. It has been. The depths of the first to third receiving portions 14, 15, and 16 are set slightly smaller than the thicknesses of the elastic member 11, the outer surface pressure adjusting member 12A, and the inner surface pressure adjusting member 12B. When the elastic member 11, the outer surface pressure adjusting member 12A, and the inner surface pressure adjusting member 12B are received in the third receiving portions 14, 15, 16 respectively, their outer surfaces are non-receiving portion forming regions of the roller body 10. It protrudes slightly outward from the outer peripheral surface.

  As shown in FIG. 4, the elastic member 11 has a substantially donut shape in plan view with a hole 11A in the center in the unfolded state, and is provided in a planar shape that is substantially the same as the adherend W such as an optical disk. It has been. On the other hand, the outer surface pressure adjusting member 12A is provided in a substantially rectangular outer edge shape, and a circular hole 12a is provided in the center thereof. The inner diameter of the hole 12a is set to be slightly larger than the diameter of the elastic member 11, and is elastic when the elastic member 11 and the outer surface pressure adjusting member 12A are received by the first and second receiving portions 14 and 15, respectively. The partition portion 17 is positioned between the outer edge of the member 11 and the inner edge of the outer surface pressure adjusting member 12A. At this time, the elastic member 11 and the outer surface pressure adjusting member 12A are fixed to the roller body 10 via an adhesive. The outer surface pressure adjusting member 12 </ b> A has a length along the longitudinal direction substantially equal to the outer peripheral length of the roller body 10, and therefore the outer surface pressure adjusting member 12 </ b> A is wound around the roller body 10. In addition, both ends in the longitudinal direction are in a state of abutting each other, and are provided so that no step is generated on the outer periphery of the bonding roller R.

  The inner side pressure adjusting member 12B has a substantially circular shape in plan view, and is disposed in an inner peripheral side region of the elastic member 11. The partition portion is disposed between the outer edge of the inner side pressure adjusting member 12B and the inner edge of the elastic member 11. 18 is located.

  The elastic member 11 and the surface pressure adjusting elastic member 12 are made of a sheet material having the same thickness made of rubber or urethane. In the present embodiment, although not particularly limited, the thickness thereof is set to about 3 mm. On the other hand, the depths of the first to third receiving portions 14, 15, 16 are set to about 2.7 mm. Accordingly, the elastic member 11 and the surface pressure adjusting elastic member 12 protrude outward by about 0.3 mm with respect to the outer peripheral surface of the roller body 10 excluding the receiving portions 14, 15, and 16. The thickness of the elastic member 11 and the surface pressure adjusting elastic member 12 is preferably 0.5 mm to 10 mm, particularly preferably 2 mm to 5 mm. Moreover, although the protrusion amount of each elastic member 11 and 12 with respect to the outer peripheral surface of the roller main body 10 is based also on the elasticity modulus of the elastic member 11, 0.1 mm-1 mm are preferable and 0.1 mm-0.5 mm are especially preferable.

  The table T that supports the adherend W is provided with a concave portion 20 having a substantially donut shape in plan view on the upper surface thereof, and is provided so that the adherend W can be received in the concave portion 20. . The diameter of the recess 20 is set slightly larger than the diameter of the adherend W. With the adherend W positioned in the recess 20, the outer periphery of the adherend W and the inside of the recess 20 are arranged. A gap S (see FIG. 5B) of about several millimeters is formed between the periphery. This is because if the inner diameter of the concave portion 20 is made approximately equal to the diameter of the adherend W, the processing accuracy of the concave portion 20 becomes too strict. In addition, suction holes (not shown) are formed in the surface of the recess 20, whereby the adherend W disposed in the recess 20 is supported by suction and is not displaced in the surface direction. . Here, the depth of the recess 20 is set to be substantially the same as the thickness of the adherend W, the surface pressure between the adherend W and the elastic member 11, and the table T around the adherend. The surface pressure between the upper surface and the surface pressure adjusting elastic member 12 is the same. In the present embodiment, a convex portion 21 located in the inner peripheral hole W1 of the adherend W is formed in the central portion of the concave portion 20.

  Next, the label bonding method in this embodiment is demonstrated.

  An adherend W is arranged in the recess 20 of the table T using a robot hand (not shown) and the adherend W is sucked and supported. On the other hand, the label L pre-cut into a label shape in the process of feeding out an appropriate belt-like film is adsorbed and held by a label holder that is integrally provided with the laminating roller 10. At this time, the lead end of the label L is adjusted in timing so that the lead end coincides with the outer peripheral end of the elastic member 11, and is aligned so that the outer peripheral end of the elastic member 11 coincides with the outer peripheral end of the adherend W. Is done.

  Next, while releasing the adsorption of the label L by a label holding body (not shown), the label holding body is displaced in an inclined posture together with the laminating roller 10 to adhere the adhesive surface of the label L to the adherend W and move in the lateral direction. As a result, the labels L are sequentially attached toward the diameter direction of the adherend W. At this time, the elastic member 11 and the elastic member 12 for adjusting the surface pressure are subjected to a reaction force due to the pressing, but due to the presence of the first to third receiving portions 14, 15, 16, the deformation caused by the pressing force. And is effectively prevented from being deformed laterally outward along the surfaces of the elastic member 11 and the surface pressure adjusting elastic member 12 as in the prior art. Moreover, since the elastic member 11, the outer surface pressure adjusting member 12A, and the inner surface pressure adjusting member 12B are discontinuous with each other, the gap S described above exists between the adherend W and the recess 20. Even if it is, the elastic member does not enter the gap S. For this reason, the pressing force in the vicinity of the label edge is surely applied to the label L. In addition, the apparatus for pre-cutting the label L to form the label L in the process of feeding the above-described belt-shaped film, the label holding body, and the like are substantially the same as those disclosed in Japanese Patent Application No. 2003-111377 already filed by the present applicant. The thing is adopted.

  In the bonding of the label L, in this embodiment, the pressing force by the bonding roller R is performed in a constant state, but the surface pressure on the upper surface of the label L does not change. More specifically, as shown in FIG. 5, the contact area (indirect contact) between the elastic member 11 and the adherend W at the start of bonding is a, while the contact pressure adjusting elastic member 12 and When the contact area with the upper surface of the table T is 4a (see FIG. 5 (A)), the contact area between the elastic member 11 and the adherend is approximately 4a at the time of bonding, while the contact pressure is adjusted. The contact area between the elastic member 12 for use and the upper surface of the table T is provided so as to gradually decrease to a. Therefore, in the case of FIG. 5 (A) and FIG. 5 (B), even if the pressing force F is set to be constant, their surface pressures are almost equal to F / 5a.

  Therefore, according to such an embodiment, when the label L is bonded in the diameter direction by the bonding roller R using the optical disk or the like as the adherend W, a change in surface pressure with respect to the adherend W is caused. No, the label L can be bonded to the adherend W without adjusting the pressing force F. Moreover, since the elastic member 11, the outer surface pressure adjusting member 12A, and the inner surface pressure adjusting member 12B are respectively received by the first to third receiving portions 14, 15, and 16, the pressing force F is applied. Therefore, the elastic member 11 and the elastic member 12 for adjusting the surface pressure are exclusively compressed and deformed, and the pressing force is equally applied to the label L. In addition, for example, when pre-cut into a label shape with a rotary die in the process of feeding a strip film as a material of the label L, even if the adhesive near the cut surface is deformed and bubbles are generated, the bubbles are reliably crushed. As a result, it is possible to effectively prevent fine bubbles from being mixed.

As described above, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
In other words, the present invention has been illustrated and described mainly with respect to specific embodiments, but without departing from the scope of the technical idea and object of the present invention, the shape, position, or With respect to the arrangement and the like, those skilled in the art can make various changes as necessary.

  For example, in the embodiment, the elastic member 11, the outer surface pressure adjusting member 12 </ b> A, and the inner surface pressure adjusting member 12 </ b> B are received by the first to third receiving portions 14, 15, 16 provided on the outer periphery of the roller body 10. In addition, the concave portion 20 is provided in the table T that supports the adherend W, but the receiving portions 14, 15, 16 and the concave portion 20 may be provided. That is, if the upper surface of the table T is a flat surface and a thickness corresponding to the thickness of the adherend W and the label L is added to the outer surface pressure adjusting member 12A and the inner surface pressure adjusting member 12B, the surface pressure is substantially increased. Can be kept constant. However, if the configuration shown in the above-described embodiment is employed, it is possible to effectively prevent deformation at the peripheral edge portions of the elastic member 11 and the surface pressure adjusting elastic member 12. In the above embodiment, since the circular hole W1 exists in the central portion of the optical disc, the inner surface pressure adjusting member 12B corresponding to the circular hole W1 is provided. However, the contact area between the elastic member 11 and the adherend W, When the area of the hole W1 is very small (for example, 30% or less in area ratio) with respect to the total of the contact area of the elastic member 12 for adjusting the surface pressure and the table T, and the change in the surface pressure is hardly affected The inner surface pressure adjusting member 12B may be omitted.

The schematic perspective view of the bonding roller which concerns on embodiment. Sectional drawing in alignment with the AA of FIG. The principal part schematic perspective view of a label bonding apparatus. FIG. 4 is an exploded perspective view of FIG. 3. (A) And (B) is sectional drawing for demonstrating the effect | action of this embodiment. The principal part schematic perspective view of the conventional bonding apparatus. (A) thru | or (C) is sectional drawing for demonstrating a problem when using a conventional apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Roller body 11 Elastic member 12 Elastic member for surface pressure adjustment 12A Outer surface pressure adjusting member 12B Inner surface pressure adjusting member 14 First receiving portion 15 Second receiving portion 16 Third receiving portion R Bonding roller W Adhesion Body L Label T Table

Claims (4)

In a laminating roller that applies a pressing force while rotating on a label supplied to the upper surface of the adherend disposed on the table in a state where the contact area changes,
An axial roller body, an elastic member disposed on the outer peripheral side of the roller body and in contact with the upper surface of the label , and an unfolded planar shape that is substantially the same as the label, and an adjacent region of the elastic member A laminating roller comprising: an elastic member for adjusting a surface pressure that is disposed discontinuously with the elastic member and is in contact with an upper surface of a table around the adherend. The roller body includes a receiving portion for the elastic member and a surface pressure adjusting elastic member on an outer peripheral surface, and the surface of the elastic member and the surface pressure adjusting elastic member received by the receiving portion is an outer peripheral surface of the roller main body. The laminating roller according to claim 1, wherein the laminating roller is located more radially outward. The adherend is an information recording substrate having a substantially donut shape in plan view,
The elastic member is provided in a substantially donut shape corresponding to the planar shape of the adherend,
The elastic member for adjusting the surface pressure is composed of an outer surface pressure adjusting member positioned outside the outer periphery of the elastic member and an inner surface pressure adjusting member positioned inside the inner periphery of the elastic member. The laminating roller according to claim 1 or 2. The table includes a table that supports the adherend, and a bonding roller disposed above the table, and the pressing force is applied to the label that is disposed on the adherend while the bonding roller rotates while the contact area changes. In the label laminating device
The table has an upper surface shape in which the upper surface of the adherend and the upper surface around the adherend are substantially flush with the adherend being supported,
The laminating roller has an axial roller body, an elastic member disposed on the outer peripheral side of the roller body and in contact with the upper surface of the label, and a flat shape in a developed state substantially the same as the label, and the elasticity A label sticking comprising: an elastic member for adjusting a surface pressure that is disposed in a region adjacent to the member and is provided discontinuously with the elastic member and is in contact with the upper surface of the table around the adherend. Combined device.

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