JP2008105842A - Concealing label peeling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concealing label peeling device which does not limit the peeling direction of a concealing label and has superior versatility. <P>SOLUTION: In a label peeling portion 54 peeling a concealing label 20 from a postal card 30 with the concealing label, an upper surface of the postal card 30 with the concealing label on which a peeling tape 40 is pressed and attached is retained by a peeling tool 68 of a rod-shape increasing an outer diameter from both end portions of a rotating shaft toward a center portion to be bent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for peeling a concealment label from a postcard with a concealment label in which a concealment label is attached to a postcard.

  2. Description of the Related Art Conventionally, there are postal items that should be mailed while protecting written information, such as an account transfer application form, a dividend transfer designation form, and a voting right exercise form. Usually, when handling such postal items, the trader encloses the reply postcard and concealment label in an envelope and mails it to the user. The user writes the prescribed items on the reply postcard and then attaches the concealment label on the postcard. Return to the supplier. Then, the trader who receives the reply postcard peels off the concealment label and reads and processes the information written by the user.

  Conventionally, the concealment label is peeled off manually on the company side. However, if the number of concealment labels to be peeled off is large, the burden on the operator increases. Therefore, in order to reduce the burden on such workers, in recent years, an apparatus that automatically peels off the concealment label without using manual work is used (for example, see Patent Document 1 below).

  The apparatus disclosed in Patent Document 1 comes to peel off the peeling tape and the concealment label at the same time by pulling the release tape after pressing the release tape having the pressure sensitive adhesive on the postcard with the concealment label. ing. However, this apparatus has a drawback that only the concealment label having an inclination in the peeling direction can be peeled off. That is, as shown in FIG. 9 of Patent Document 1, the concealment label that can be peeled by this apparatus has a special shape in which a protrusion is provided on the upper end of the label, and the peeling start position is also limited to the protrusion. . As described above, since the peeling direction has to be provided with an inclination, there is a problem that the concealed area of the information column provided on the communication surface of the postcard is reduced.

Japanese Patent No. 3807723

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a concealment label peeling apparatus excellent in versatility in which the peeling direction of the concealment label is not limited.

  In order to achieve the above object, the present invention provides a concealment label peeling apparatus for stripping a concealment label from a postcard with a concealment label having a concealment label affixed to the communication surface of the postcard, the postcards with the concealment label one by one. Postcard conveying means for continuously conveying, tape supply means for continuously supplying a release tape having a pressure-sensitive adhesive on the back surface toward the postcard with the concealment label, and a postcard on the label affixing surface of the postcard with the concealment label A tape crimping means for crimping the release tape along the transport direction of the postcard, and a postcard with a concealment label to which the release tape crimped to the postcard with the concealment label is pulled away from the transport direction of the postcard and the release tape is crimped A bar placed between a concealment label and a postcard, with the top surface pressed and bent with a round bar-shaped stripping tool whose outer diameter increases from both ends of the rotating shaft toward the center. Alternatively, by pressing the postcard with a flat stripping aid to prevent floating, the label peeling means for peeling the peeling tape and the concealment label from the postcard with the concealment label at the same time, and the peeled peeling tape and the concealment label continuously And a label winding means for winding.

  In the concealment label peeling apparatus having the above-described configuration, the inclination angle of the outer peripheral portion with respect to the axial center of the peeling tool is set in a range of 0.52 to 1.56 °.

  According to the concealment label peeling apparatus of the present invention, the outer diameter of the peeling tool constituting the label peeling means is increased from the both ends of the rotating shaft toward the central portion, and the outer peripheral portion is inclined at a predetermined angle with respect to the axis. By this, even if the concealment label is tilted, the concealment label and the peeling tool are in contact with each other over a wide range, so that the tensile load by the peeling tape is dispersed without concentrating on one point, and can be peeled without breaking the concealment label . Therefore, the allowable range of the attachment angle of the concealment label with respect to the postcard is widened, and the concealment area of the information column provided on the communication surface of the postcard can be expanded. Also, since the direction of peeling the concealment label is not particularly limited, the concealment label can be peeled off even if the postcard is inserted in either the vertical or horizontal direction, and the concealment of a special shape provided with a protrusion as in the past Not only the label but also a rectangular concealed label having no protrusion can be peeled off, and the label peeling rate is greatly improved as compared with the conventional apparatus.

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

  FIG. 1 is a diagram showing the configuration of the concealment label peeling apparatus of the present invention. The concealment label peeling apparatus 50 shown in the figure includes a postcard transport unit 51, a tape supply unit 52, a tape crimping unit 53, a label peeling unit 54, a label winding unit 55, a winding auxiliary unit 56, and a postcard discharge unit 57. The apparatus is configured to peel off the concealment label 20 from the postcard 30 with the concealment label.

《Postcard transport unit》
The postcard transport unit 51 is a means for transporting the postcard 30 with a concealment label, and includes a paper feed tray 61, a transport belt 62, and a transport roller 63.

  A plurality of postcards with concealment labels 30, 30,... Are stacked in the same direction on the paper feed tray 61. First, the postcards 30 with concealment labels will be described first.

  FIG. 2 is a diagram showing the configuration of a postcard with a concealment label. The postcard 30 with a concealment label shown in the figure can be mailed with the information A described in the information column 11 secretly by pasting the concealment label 20 on the information column 11 provided on the communication surface of the postcard 10. Is.

  The concealment label 20 is a re-peeling label in the present embodiment, and is composed of a label base material 21 such as paper or a resin film, an adhesive layer 22, and a concealment layer 23.

  The pressure-sensitive adhesive layer 22 is obtained by applying a detachable pressure-sensitive adhesive to the back surface of the label base material 21. If the label base material 21 is paper, an acrylic emulsion-type pressure-sensitive adhesive is suitable, but the label base material 21 is a resin. As long as it is a film, various adhesives such as solvent-based acrylic, rubber, hot melt, and silicone can be used. The adhesive strength of the pressure-sensitive adhesive layer 22 is set within a range of 8 to 400 gf / 25 mm (measured by a 180 ° peeling method according to JIS Z0237). When the adhesive strength of the pressure-sensitive adhesive is too strong, the adhesive strength is adjusted by applying a paste-killing process on the pressure-sensitive adhesive layer 22 with halftone dots or pattern printing of an ultraviolet curable varnish or the like.

  The concealing layer 23 is obtained by applying a permeation preventing process to the surface of the label substrate 21, and is formed by performing solid printing or tint block printing with dark inks such as black, blue, and dark blue. The concealing layer 23 is not limited to printing, and may be configured by sticking colored paper or a colored film or vapor deposition of a metal film, as long as the back side of the label substrate 21 cannot be seen through.

  The concealment label 20a shown in FIG. 2 (a) has a mountain shape provided with a triangular projection having one side of the label base 21 as a base, which is the initial stage when the concealment label 20a is peeled from the postcard 10. This is because the resistance is reduced to facilitate peeling. However, according to the concealment label peeling apparatus 50 of the present invention, not only the concealment label 20a provided with the protrusions but also the concealment label 20b having no protrusions as shown in FIG. Since the peeling direction is not limited, the concealed area of the information column 11 provided on the communication surface of the postcard 10 can be expanded. In addition, in order to press-fit the below-mentioned peeling tape 40 reliably, it is good to provide the peeling opening 24 which exposed the label base material 21 in the peeling start position of the concealment label 20. FIG.

  The above is the configuration of the postcard 30 with the concealment label. The postcard 30 with the concealment label set on the paper feed tray 61 in FIG. 1 is continuously conveyed one by one by the conveyance belt 62 and the conveyance roller 63. That is, the conveying belt 62 and the conveying roller 63 arranged to face each other intermittently feed out the postcard 30 with the concealment label at a predetermined pitch by the rotation of the driving motor. The postcard 30 with the concealment label passes between the transport belt 62 and the transport roller 63 with the surface to which the concealment label 20 is applied facing upward, and the label application surface is attached to the tape press part 53 at the subsequent stage. It is conveyed so that it comes to the surface.

<Tape supply unit>
The tape supply unit 52 is means for supplying the peeling tape 40 and includes a reel 64 and a feeding roller 65.

  A release tape roll 45 obtained by winding the release tape 40 in a roll shape is set on the reel 64. Here, the release tape 40 will be described.

  FIG. 3 is a diagram showing the configuration of the release tape. The release tape 40 shown in the figure is composed of a tape base 41 such as glassine paper, a pressure-bonding layer 42 and a release layer 43.

The tape base 41 is continuous in a long shape with a paper width of about 10 to 50 mm, and the back surface of the tape base 41 is entirely coated with a pressure-sensitive adhesive containing acrylic resin as a main component and containing a small amount of silica. A crimped layer 42 is provided. Moreover, in order to prevent blocking with the crimping | compression-bonding layer 42 by the winding pressure at the time of making it roll shape, the peeling layer 43 which apply | coated the release agent which has silicone as a main component is provided in the surface of the tape base material 41. FIG. In addition, the paper thickness of the peeling tape 40 is set to ^{20 to} 100 μm, and the tensile strength is set to 5 kgf / mm ² or more.

  The configuration of the peeling tape 40 is as described above. When the feeding roller 65 rotates in FIG. 1, the peeling tape 40 is sequentially pulled out from the peeling tape roll 45 set on the reel 64, and then to the subsequent tape pressing portion 53. Supplied. Further, the peeling tape 40 is supplied along the conveying direction of the postcard 30 with the concealment label in a state in which the pressure bonding layer 42 on the back surface faces the tape pressing portion 53. In other words, the postcard 30 with the concealment label is conveyed with the concealment label 20 attached face up, and the release tape 40 is conveyed with the pressurization layer 42 facing down, with the concealment label 20. And the release tape 40 are joined together.

《Tape crimping part》
The tape pressing portion 53 is a means for pressing the peeling tape 40 against the postcard 30 with a concealing label, and includes a pressing roller 66.

  FIG. 4 is a diagram showing the configuration of the tape crimping portion. In the tape crimping portion 53 shown in the figure, a pair of crimping rollers 66 and 66 are disposed opposite to each other on the conveyance path. In the conveyance path, the peeling tape 40 supplied from the peeling tape roll 45 by the tape supply unit 52 joins the postcard 30 with the concealment label conveyed from the postcard conveyance unit 51, and the concealment label 20 and the pressure-bonding layer 42 contact each other. In this state, it passes between the pressure rollers 66, 66.

  FIG. 5 is a diagram showing a state of a postcard with a concealment label between pressure rollers. As shown in the figure, the peeling tape 40 is supplied along the conveying direction to the postcard 30 with the concealment label passing between the pressure rollers 66, 66, and the pressure-bonding layer 42 on the back surface of the peeling tape 40 is the concealment label 20. The pressure roller 66 is pressed with a predetermined pressure while contacting the peeling port 24 and the masking layer 23 in this order.

  FIG. 6 is a view showing a state of the postcard with a concealment label after passing between the pressure rollers. As shown in the figure, when passing between the pressure-bonding rollers 66, 66, the peeling tape 40 cuts the center in the width direction of the postcard 30 with the concealment label, and is peeled off by the adhesive force of the pressure-bonding layer 42 on the back surface. It is in a crimped state.

<Label peeling part>
The label peeling unit 54 is a means for peeling the peeling tape 40 and the concealment label 20 from the postcard 30 with a concealment label, and includes a pulling roller 67, a peeling tool 68, and a peeling aid 69.

  FIG. 7 is a diagram showing the configuration of the label peeling portion. As shown in the figure, the pulling roller 67 has a mesh roller at the center, holds the peeling tape 40 with an appropriate grip force, and rotates the peeling tape 40 away from the conveying direction of the postcard 10. Towed. Further, a peeling tool 68 and a peeling auxiliary tool 69 are installed in the conveyance path on the rear side of the pressure roller 66.

  FIG. 8 is a diagram showing the configuration of the peeling tool. As shown in the figure, the peeling tool 68 is composed of a round bar that is rotatably supported. Considering the vertical size of the postcard 10, the width of the peeling tool 68 is about 160 to 190 mm which is wider than that, and the diameter increases from the end 68a on both sides of the rotating shaft toward the center 68b. The outer diameter R2 (about 8.0 to 10.0 mm) of the central portion 68b is set larger than the outer diameter R1 (about 7.0 mm). As described above, the central portion 68b is thicker than the end portion 68a, and the outer peripheral portion is inclined by a predetermined angle with respect to the axis L, but the inclination angle α is set within a range of 0.52 to 1.56 °. Has been. This is because if the inclination angle α is smaller than the above value, it becomes close to a straight line, and if the concealment label 20 is inclined, tearing will occur, and if the inclination angle α is larger than the above value, the inclination will be too tight and concealment will occur. This is because the label 20 does not come into full contact with the peeling tool 68 and the label peeling rate decreases.

  The peeling assisting tool 69 is composed of a flat plate having an L-shaped cross section, and is disposed at the subsequent stage of the peeling tool 68. The peeling aid 69 may be a round bar instead of a flat plate as long as the postcard 10 can be pressed.

  FIG. 9 is a view showing a state of a postcard with a concealment label in the label peeling portion. As shown in the figure, the postcard 30 with the concealment label to which the release tape 40 is pressure-bonded has a predetermined direction in the direction in which the release tape 40 located on the outermost surface is separated from the postcard 10 by the rotation of the pulling roller 67 (upward in the figure). It is pulled by force. Further, the upper surface of the postcard 30 with a concealment label is pressed and bent by the peeling tool 68, and the direction is changed by the peeling auxiliary tool 69. At this time, the pressure-bonding surface P1 between the pressure-bonding layer 42 and the concealing layer 23 has a stronger adhesive force than the pressure-sensitive adhesive layer 22 and the bonding surface P2 of the postcard 10, so that the concealment label 20 pressure-bonded to the peeling tape 40 is peeled off from the postcard 10. It is. A peeling aid 69 is disposed between the concealment label 20 and the postcard 10, and the postcard 10 is pressed by the peeling aid 69 to prevent floating, and the conveyance direction of the postcard 10 is restricted. Yes.

  FIG. 10 is a diagram comparing the state at the time of peeling with the conventional peeling roller and the state at the time of peeling with the peeling roller of the present invention. In the label peeling part 54, the peeling tape 40 is pulled to the vertical direction with respect to the peeling tool 68, and the peeling process of the concealment label 20 is performed. For this reason, when a straight stripping tool 68 ′ is used as shown in FIG. 5A, the concealment label-attached postcard 30 attached in a state where the concealment label 20 is inclined with respect to the postcard 10 is concealed. A tensile load concentrates on the point A where the label 20 and the peeling tool 68 intersect, and the concealment label 20 may be torn vertically from the point A at the time of peeling. On the other hand, when the peeling tool 68 having an inclination angle is used as shown in FIG. 5B, the concealment label 20 and the peeling tool 68 come into contact with each other over a wide range even when the same postcard 30 with the concealment label is inserted. In addition, since the tensile load is dispersed without concentrating on one point, it is possible to prevent the concealment label 20 from tearing starting from the point B.

《Label winding part》
The label winding unit 55 is a unit that winds up the peeling tape 40 and the concealment label 20, and includes a winding roller 70.

  FIG. 11 is a diagram showing the state of the concealment label after peeling. As shown in the figure, the concealment label 20 is pressure-bonded to the release tape 40 peeled from the postcard 30 with the concealment label, and the concealment label 20 with the release tape is wound around the guide roller 76 shown in FIG. It is wound around the take-up roller 70.

《Rewinding auxiliary part》
The winding assisting part 56 is a means for pressing the peeled concealment label 20 to prevent it from being bent, and includes a first pressing member 71 and a second pressing member 72.

  FIG. 12 is a diagram showing the configuration of the first pressing member. The first pressing member 71 is made of a material having an appropriate compressive elastic force. In the present embodiment, the first pressing member 71 is made of a thin plate, and the rear end portion of the plate is bonded and fixed to the upper surface of the peeling tool 68 and bent. The raised tip is brought into contact with the pulling roller 67. The width of the plate is set to about 10 to 45 mm in consideration of the width of the concealment label 20, and the compression elastic force is set within the range of 0.8 to 30N. For compression elastic force, the sample is cut to 150 mm and attached to a tensile tester (a tensile tester used in an adhesive strength measurement test based on JIS Z0237) and compressed (pressed at a speed of 300 mm / min). At that time, the average value between 10 and 50 mm was measured from the start of compression.

  The first pressing member 71 pulls the tape non-crimped part (in this embodiment, both ends of the label) to which the peeling tape 40 is not crimped with an appropriate force from the label surface side with respect to the concealment label 20 immediately after peeling. By pressing against the roller 67, the concealment label 20 is prevented from being bent during the conveyance.

  FIG. 13 is a diagram showing the configuration of the second pressing member. The second pressing member 72 is also made of a material having an appropriate compressive elastic force. In this embodiment, an elongated insulating lock tie is used and the insulating lock tie is disposed above the pulling roller 67. It is wound around and fixed under the square rod 74 adjacent to the support shaft 73, and the tip end portion to which the spring force is applied is brought into contact with the winding roller 70. The width of the insulation tie is preferably about 10 to 45 mm, and the length is preferably about 300 to 540 mm, and the compression elastic force is set within a range of 3 to 30 N (measurement of the compression elastic force is the same as above). .

  The second pressing member 72 winds the concealment label 20 at the time of winding by pressing the tape non-crimped portion to which the peeling tape 40 is not crimped against the winding roller 70 from the back side of the label with an appropriate force. The folding of the concealment label 20 in the middle is prevented.

  In this manner, the winding assisting portion 56 prevents the concealment label 20 from being bent immediately after peeling and during winding, so that the probability of jamming such as the concealment label 20 being clogged between rollers can be reduced.

《Postcard discharge unit》
The postcard discharge unit 57 is a means for discharging the postcard 10 from which the concealment label 20 has been peeled off, and includes a paper discharge tray 75.

  As shown in FIG. 1, a conveyance belt is attached to the paper discharge tray 75, and postcards 10 that have been peeled off and placed on the conveyance belt are continuously conveyed one by one and collected in a box (not shown). It has come to be.

  The above is the configuration of the concealment label peeling apparatus according to the present invention. Hereinafter, examples performed by the present inventors will be described.

  Table 1 below strips the concealment label from the postcard with the concealment label using a concealment label stripping device (peeling M, Kobayashi Recording Paper Co., Ltd., stripping speed 5000 sheets / hour) with the shape of the stripping tool changed, The verification results of the label peeling rate and the label tearing rate at that time are shown. The peeling tool used was one whose outer diameter at the end was constant and the outer diameter and the inclination angle of the central part were changed, and the concealment label was a square having no protrusion. The label peeling rate represents the number of concealment labels that could be peeled off when 1000 sheets were operated continuously, and the label tearing rate was the same as the concealment that could not be peeled due to tearing when the 1000 sheets were operated continuously Indicates the number of labels.

  As is apparent from Table 1, when the inclination angle of the peeling tool is 0 ° (linear), the concealment label is easily broken, and the occurrence rate of label tearing becomes very high. Further, when the inclination angle of the peeling tool is 2.08 °, the concealment label is hardly broken and the occurrence of label tearing can be eliminated, but the label peeling rate is extremely lowered. On the other hand, when the inclination angle of the peeling tool was 0.52 ° and 1.56 °, favorable results were obtained for both the label peeling rate and the label tearing rate.

  Table 2 below shows the verification result of the label peeling rate at the time when the concealment label was peeled from the postcard with the concealment label using the concealment label peeling apparatus (same as above) in which the shape of the peeling tool was changed. The stripping tool used was one having no inclination angle and one having an inclination angle, and the concealment label was a chevron with a protrusion and a square without a protrusion. The label peeling rate represents the number of concealment labels that can be peeled off when 1000 sheets are continuously operated.

  As is clear from Table 2, when the inclination angle of the peeling tool is 0 ° (straight), the label peeling rate of the mountain-shaped concealment label is high, but the label peeling rate of the square concealment label is low. On the other hand, when the inclination angle of the peeling tool was 0.52 °, favorable results were obtained for both the label-shaped concealment label and the square concealment label.

  As described above, according to the concealment label peeling apparatus 50 of the present invention, the label peeling unit 54 can peel the label without breaking even if the concealment label 20 is tilted. On the other hand, there is an advantage that the allowable range of the attaching angle of the concealment label 20 is widened. Moreover, since the direction in which the concealment label 20 is peeled off is not particularly limited as described above, the concealment label 20 can be peeled off even if the postcard 10 is inserted in either the vertical or horizontal direction. Further, not only the mountain-shaped concealment label 20a provided with the protrusions as shown in FIG. 2, but also the quadrangle concealment label 20b without the protrusions can be peeled off, and the label peeling rate is higher than that of the conventional apparatus. Greatly improved.

The figure which shows the structure of the concealment label peeling apparatus of this invention. The figure which shows the structure of the postcard with a concealment label. The figure which shows the structure of a peeling tape. The figure which shows the structure of the tape crimping | compression-bonding part in a concealment label peeling apparatus. The figure which shows the state of the postcard with a concealment label between press rollers. The figure which shows the state of the postcard with a concealment label after passing between press rollers. The figure which shows the structure of the label peeling part in a concealment label peeling apparatus. The figure which shows the structure of a peeling tool. The figure which shows the state of the postcard with a concealment label in a label peeling part. (A) is a figure which shows the state at the time of peeling of the concealment label by the conventional peeling tool, (b) is a figure which shows the state at the time of peeling of the concealment label by the peeling tool of this invention. The figure which shows the state of the concealment label after peeling. The figure which shows the structure of the 1st pressing member in a winding assistance part. The figure which shows the structure of the 2nd pressing member in a winding assistance part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Postcard 11 Information column 20 Concealment label 21 Label base material 22 Adhesive layer 23 Concealment layer 24 Peel off opening 30 Postcard with concealment label 40 Peel tape 41 Tape base material 42 Crimp layer 43 Peel layer 45 Peel tape roll 50 Concealment label peeling apparatus 51 Post card Conveying unit 52 Tape supply unit 53 Tape pressing unit 54 Label peeling unit 55 Label winding unit 56 Winding auxiliary unit 57 Postcard discharge unit 61 Paper feed tray 62 Conveying belt 63 Conveying roller 64 Reel 65 Feeding roller 66 Crimping roller 67 Pulling roller 68 Peeling tool 68a End portion 68b Center part α Inclination angle 69 Peeling aid 70 Winding roller 71 First pressing member 72 Second pressing member 73 Support shaft 74 Square bar 75 Paper discharge tray

Claims (2)

A concealment label peeling apparatus that peels off a concealment label from a postcard with a concealment label having a concealment label affixed to the communication surface of the postcard,
Postcard transport means for continuously transporting the postcards with concealment labels one by one;
Tape supply means for continuously supplying a release tape having a pressure-sensitive adhesive on the back surface toward the postcard with the concealment label;
A tape crimping means for crimping a release tape along the transport direction of the postcard to the label application surface of the postcard with the concealment label;
Pull the peeling tape crimped to the postcard with the concealment label away from the transport direction of the postcard, and the outer diameter of the upper surface of the postcard with the concealment label to which the peeling tape is crimped is increased from both ends of the rotating shaft toward the center. A postcard with a concealment label is formed by pressing it with a large round bar-shaped stripping tool and bending it, and holding the postcard with a stick-shaped or flat strip-shaped stripping aid placed between the concealment label and the postcard to prevent floating. Label peeling means for simultaneously peeling the peeling tape and the concealment label from,
Label winding means for continuously winding the peeled release tape and the concealment label,
A concealing label peeling apparatus comprising:   2. The concealment label peeling apparatus according to claim 1, wherein an inclination angle of an outer peripheral portion with respect to an axis of the peeling tool is set in a range of 0.52 to 1.56 °.

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