JPH05286286A - Method and device for sticking hot melt-type label - Google Patents

Abstract

PURPOSE:To stick a label provided with a hot melt layer at a high speed without breaking a shielding layer or a release layer. CONSTITUTION:Metallic plates 12, 12 with heaters are spaced at an enough interval to pass a form 2 toward a roll mechanism 7 disposed above them. A series of labels 3... are cut to pieces by a cutter roll 15. Magnetic belts 19, 19 are provided for feeding these labels with hot melt layers facing the form 2. The labels are overlapped on the form. In this state, the both are passed through between a main roll 7a and pressurizing rolls 7b, 7c. The hot melt layers are melted by the heat of the form. The labels are positively stuck to the form by the pressure of the pressurizing rolls.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot melt label sticking method and sticking device for sticking a label having a hot melt layer formed on a sticking sheet such as a postcard.

[0002]

2. Description of the Related Art A postcard, in which a label is attached to a portion where a message is written at the time of mailing to keep the message confidential and the label is peeled off so that only the recipient can read the message, has become widespread in various fields in recent years. Labels attached to such postcards include those having an adhesive layer formed on the back surface and those having a hot melt layer formed on the back surface. The label having the adhesive layer formed thereon is previously attached to a mount having a release layer formed thereon, and the label must be peeled off one by one and then attached to a postcard. For this reason, when mechanizing the work of sticking a label on a postcard, it becomes difficult to process the label at a high speed at the step of peeling the label, and in the end, it is difficult to perform high-speed processing even if it is automated, and it is also difficult to reduce the cost. Is. Further, there are roughly two methods of sticking a label having a hot melt layer formed on a postcard, and one of them is a heating and pressing method using a heating roll 51 and a pressing roll 52 as shown in FIG. One is a thermocompression bonding method using a heating chamber 53, a heating roll 54, and a roll 55, as shown in FIG. 7. In the thermocompression bonding method using the heating roll 51 and the pressure roll 52, the label 57 and the postcard 56 are overlapped with the hot melt layer being in contact with the postcard 56, and both are heated rolls with the label 57 being in contact with the heating roll 51. It passes between 51 and the pressure roll 52. That is,
In this method, the heat of the heating roll 51 is transferred to the front side of the label 57 to melt the hot melt layer and press-bond it in this molten state. On the other hand, in the thermocompression bonding method using the heating chamber 53 and the rolls 54 and 55, a part of the label 57 is temporarily fixed to the predetermined position of the postcard 56 with the heating iron 58, and in this state, the heating chamber 53 is heated.
The hot melt layer is heated by the heat of the heater 59 provided on the label 57 side and the hot atmosphere inside the room to melt the hot melt layer. It is a method of crimping by passing between. As described above, the conventional method of attaching the hot-melt label is to melt the hot-melt layer by heating from the front side of the label.

[0003]

[Problems to be solved] However, when automating the work of sticking a hot-melt label, high-speed processing by the conventional method makes it difficult to peel off after sticking and causes inconveniences such as sticking of the label. Occurs. That is, the label is
As shown in FIG. 6, a shielding layer 61 for preventing see-through is formed on the back surface of a base material 60 such as paper, and a peeling layer 62 for facilitating peeling after attachment is formed on the shielding layer 61. A hot melt layer 63 is formed on the release layer 62. Generally, dark color printing is used for the shielding layer 61.
Aluminum foil or aluminum thin film is also used to enhance the shielding effect. When the label 57 having such a configuration is stuck on the postcard 56 by passing it between the heating roll 51 and the pressure roll 52, the heat of the heating roll 51 is first transferred from the surface of the label 57. The heat is transmitted to the base material 60, and this heat is then transferred to the shielding layer 6.
1 and the peeling layer 62 to reach the hot melt layer 63. Therefore, the base material 60 has the highest temperature, and the shielding layer 61, the peeling layer 62, and the hot melt layer 63 sequentially have lower temperatures. Then, the temperature of the hot melt layer 63 rises due to the heat transferred in sequence, but the hot melt layer 63
Since the surface of the card is pressed against the postcard 56 at room temperature, heat easily escapes to the postcard 56 and the temperature cannot be efficiently raised. For this reason, insufficient melting occurs and the adhesive force is reduced. This decrease in the adhesive force is more remarkable because the temperature difference between the base material and the hot melt layer 63 is enlarged when the high speed processing is performed. If the temperature of the hot-melt layer 63 is increased in a short time by increasing the temperature of the heating roll 51 in order to eliminate the insufficient adhesion, the shielding layer 61 and the peeling layer 6
The temperature of 2 becomes too high and is thermally destroyed, which makes it difficult to peel off after attachment. In particular, when an aluminum foil or an aluminum thin film is used for the shielding layer 61, the heat is easily stored in the aluminum itself because it is easily heated, and the destruction of the heating roll 51 when the temperature is raised to perform high-speed processing is remarkable. Yes, normal peeling cannot be performed after attachment. Also, in the method of heating the label 57 by passing it through the heating chamber 53, the same phenomenon as described above occurs because the heating is performed mainly from the front side of the label 57, and the speed at which the label 57 is temporarily fixed by the heating iron 58. Also, it cannot be processed at high speed.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention has been proposed in view of the above, and after heating the adherend sheet, the label is superposed on the adherend sheet with the hot melt layer in contact therewith. It is characterized in that the hot melt layer is melted and adhered by pressing and heat of the adherend sheet. The melt layer may be melted and attached. The sticking device is a heating mechanism for heating the sticking sheet in which predetermined items are described, and a label having a hot-melt layer formed on the back side of a base material such as paper and the hot-melt layer on the heated sticking sheet. It is characterized in that it is provided with a label supply mechanism for supplying in a state of being directed to the adherend sheet side, and a roll mechanism for allowing the adherend sheet and the label to pass while sandwiching them in a superposed state. In addition, the sticking device includes at least a pair of rolls through which a label having a hot melt layer formed on the back side of a base material such as paper is passed while being pressed in a state of being superposed on the sticking sheet, and the sticking target of the rolls. It is characterized in that it comprises a heater for heating a roll which is in contact with the adhesive sheet side, and the hot melt layer is fused and adhered by the heat from the adherend sheet side.

[0005]

When the label is overlaid and pressed after the hot-melt layer is in contact with the hot-melt layer, the heat of the hot-melt layer is first transferred to the hot-melt layer. Is melted and pressed at the same time, so that the label is surely stuck to the adherend sheet. Then, the heat from the hot melt layer is transmitted to the peeling layer and the shielding layer, but since the temperature is lower than the melting temperature of the hot melt layer, the shielding layer and the peeling layer are not thermally destroyed. Also,
In the sticking apparatus, the heating mechanism heats the sheet to be stuck to a predetermined temperature, and the label supply means supplies the label so that the hot melt layer contacts the sheet to be stuck. When the label is passed between the rolls in a state where the label is polymerized on the adherend sheet, the heat of the adherend sheet is first transferred to the hot melt layer to melt the hot melt layer, and the label is attached to the sticker sheet by the pressing force of the roll. Affixed to. When the hot-melt layer melts, this heat is sequentially transmitted from the shielding layer to the substrate through the peeling layer, but since it is lower than the melting temperature of the hot-melt layer, the shielding layer and the peeling layer are not thermally destroyed. .. And, even when pressurization and heating are performed at the same time,
The heat from the adherend sheet is first transferred to the hot melt layer of the label, and the heat melts the hot melt layer.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. The embodiment of the sticking device 1 shown in FIG. 1 and FIG.
A sticking device in which a form 2 with perforations capable of taking two rows of postcards of the same size as a government postcard is used as a sticking sheet, and the information entered by the computer can be covered by sticking a label 3. It is 1.

This sticking apparatus 1 is provided with a form placing section 4 for placing a form 2 punched out and folded by a computer.
A heating mechanism 5 for sequentially heating the foam 2 on the foam mounting portion 4, a coil support portion for rotatably supporting a coil 3'provided with the labels 3 ..., and a drawer from the coil support portion. The label supply mechanism 6 that cuts and supplies the series of labels 3 ... One by one, the roll mechanism 7 that allows the foam 2 and the label 3 to pass in a superposed state, and the foam 2 to which the label 3 is attached is folded. It consists of a storage unit 8 for storing.

The foam mounting portion 4 is constructed so that the folded foam 2 can be moved on the rails 10, 10 with the foam 2 placed on the movable table 9. Further, the movable table 9 is provided with positioning portions 11 ... Which regulate the position of the foam 2. Therefore, when setting the form 2, pull out the empty moving base 9 and then place the form 2
After that, it can be sufficiently pushed into a predetermined position, the uppermost portion of the folded foam 2 can be lifted up and passed through a predetermined position of the heating mechanism 5 described later, and then easily locked to the roll mechanism 7.

In the present embodiment, the heating mechanism 5 is a state in which vertically elongated metal plates 12 ... Are opposed to each other substantially in parallel with each other at a predetermined interval and are slightly inclined above the foam mounting portion 4. And a heating element (not shown) such as a film heater or a season wire is attached to the metal plates 12. The interval between the metal plates 12 and 12 facing each other is set so that the foam 2 can be reasonably brought into contact with the foam 2 when the foam 2 passes. Therefore, when the foam 2 passes through the space between the metal plates 12 and 12, the heat of the metal plates 12 and 12 is transferred to the foam 2, and the foam 2 is heated to a predetermined temperature. The lengths and temperatures of the metal plates 12 and 12 are appropriately set in consideration of the heating temperature of the foam 2 (the temperature at which the hot melt layer can be melted) and the passing speed of the foam 2, that is, the heating time.

In the embodiment shown in the drawings, the roll mechanism 7 includes a main roll 7a having a relatively large diameter in which a plurality of pins 13 are projected on one side of the outer peripheral surface, and a first roller having a diameter smaller than that of the main roll 7a. It is composed of a pressure roll 7b and a second pressure roll 7c. The first pressure roll 7b and the second pressure roll 7c are arranged in parallel with the main roll 7a and are urged toward the main roll 7a. The main roll 7a is configured to rotate at a variable speed under the control of a control device having a microcomputer by a rotary drive mechanism (not shown) including a servomotor. Therefore, when the main roll 7a is rotated while the pins 13 are fitted in the holes 14 of the foam 2 hung on the main roll 7a, the folded foam 2 on the foam mounting portion 4 is pulled out and the metal plate 12 is pulled out. , 12
The foam 2 can be heated by passing it through an interval of.

The label supply mechanism 6 is, in the embodiment shown in the drawings,
A state in which a cutting mechanism 18 including a cutter roll 16 having a cutting edge 15 on the peripheral surface and a receiving roll 17 and a label 3 top cut into pieces one by one by the cutting mechanism 18 are sandwiched between upper and lower magnetic belts 19, 19. And a feeding mechanism 21 that pulls out the label coil 3 ′ of the coil supporting portion and feeds it to the cutting mechanism 18, and the like. Then, the feed mechanism 21, the cutting mechanism 18, and the transport mechanism 2 described above.
0 operates under the control of the above-mentioned control device, and is configured to operate according to the rotation speed of the main roll 7a via the control device. The feeding mechanism 21 feeds a series of labels 3 ... to the cutting mechanism 18 by the feeding mechanism 21 in order to feed the labels 3 ... The label 3 is set to be transferred at a higher speed than the above.

In order to adjust the position of the form 2 and the supply timing of the label 3, the main roll 7 is used in this embodiment.
In addition to simply synchronizing a, the transport mechanism 20, the cutting mechanism 18, and the feeding mechanism 21, a detector 22 (for example, a photosensor) that detects the position of the label 3 is provided on the front side of the feeding mechanism, and is labeled on the label 3. For example, the black dots are read by the detector 22, the position of the label 3 is detected by this, and the label 3 is placed at a predetermined position on the foam 2 when the transport mechanism 20 supplies the label 3.

Therefore, when the label supply mechanism 6 is actuated, the feed roll of the feed mechanism 21 rotates to pull out the label coil of the coil supporting portion, and the guide portion 23 changes the direction of the pulled-out label 3. And is fed between the cutter roll 16 and the receiving roll 17 of the cutting mechanism 18. A series of labels 3 sent to the cutting mechanism 18 ...
Are cut into a predetermined length by the cutting blades 15 of the rotating cutter roll 16 and fed one by one.

The transfer speed of the transfer mechanism 20 is the same as that of the cutting mechanism 18.
Since the label 3 is fed from the cutting mechanism 18, the magnetic belt 19 of the transport mechanism 20,
When it is pinched by 19, it is transferred from the cutting mechanism 18 at a high speed as if it were pulled out. Therefore, the labels 3 ... Separated one by one are transported in a state in which a predetermined space is provided in the front and back, and are supplied to a predetermined position of the foam 2 on the main roll 7a. In addition, the space before and after the label 3 ...
It is appropriately set according to the interval between the labels 3 attached to the form 2.

The position where the transport mechanism supplies the label 3 is, as shown in FIG. 2, before the first pressure roll 7b. Therefore, the labels 3 supplied by the transport mechanism 20 ...
Passes between the first pressure roll 7b and the main roll 7a in a state of being polymerized on the foam 2. The label 3 is supplied onto the foam 2 in a direction in which the hot melt layer 24 comes into contact with the surface of the foam 2, that is, in the present embodiment, the hot melt layer 24 faces downward.

When the label 3 is placed on the foam 2 and passes between the first pressure roll 7b and the main roll 7a while being sandwiched between them, as shown in FIG. The melt layer 24 surely comes into surface contact with the surface of the foam 2, so that the heat of the foam 2 is transferred to the hot melt layer 24.
Is reliably transmitted to the hot melt layer 24, and the heat causes the hot melt layer 24 to rise to the melting point and melt. Then, the label 3 is attached to the predetermined position of the foam 2, that is, the position where the described matter can be covered by receiving the pressure of the first pressure roll 7b and the main roll 7a. Further, in this embodiment, the first pressure roll 7b
The foam 2 and the label 3 passing between the main roll 7a and the main roll 7a pass between the second pressure roll 7c and the main roll 7a, so that the hot melt layer 24 is pressed in a sufficiently molten state. And can be attached more reliably. Further, since the first pressure roll 7b and the second pressure roll 7c rotate while being in contact with the surface of the label 3, that is, the base material 25 such as paper, the heat of the label 3 is released and the shield layer 26 and peeling are performed. It also has a function of preventing overheating of the layer 27. The main roll 7a does not necessarily have to be actively heated, but may be heated by a heater to prevent the foam 2 from being cooled or to supplement the heating by the heating mechanism 5. Also, the pressure rolls 7b and 7c may be heated by a heater to supplement the heating in the heating mechanism 5.

When the foam 2 having the label 3 attached thereto is rotated to a predetermined position, the foam 2 separates from the main roll 7a, descends, and is stored in the storage portion 8. A swing arm 28 that swings in accordance with the rotation of the main roll 7a, that is, the feed length is provided between the main roll 7a and the storage unit 8.
The descending form 2 leaving the main roll 7a is folded from the previous fold by the swing guide of the swing arm 28,
It is stored in the storage unit 8. When the form 2 on the form 2 mounting portion has disappeared and the application of the label 3 has been completed, the label 3 is carried out from the storage part 8 and separated from the perforation, and the message statement part is covered with the label 3. It will be a postcard.

Another embodiment of the sticking apparatus 1 shown in FIG. 4 is one in which the form 2 which is the sticking sheet is fed in the horizontal direction, and metal plates 12 and 12 with heat sources having different lengths are provided. The heating mechanism 5 is arranged in a horizontal direction in a state of being opposed to each other at a predetermined interval, and a pair of rolls 7d and 7d is provided as the roll mechanism 7 in the vicinity of the outlets of the metal plates 12 and 12 to provide the roll function 7. The first feed roll 2 as the feed mechanism 21 in front
9, 29, shear-type cutting machine 30 as cutting mechanism 18
And the second feed roll 31 as the label supply function 6. Then, similarly to the above-described embodiment, the respective drive mechanisms (not shown) of the roll function 7, the first and second feed rolls 29 and 31, and the shear-type cutting machine 30 are synchronized under the control of the control device, Moreover, the feed rate of the second feed roll 31 is set to be faster than the feed rate of the first feed roll 29.

In the sticking apparatus 1 having such a structure, when the first feed roll 29 rotates to send the series of labels 3 to the shear type cutting machine 30, the shear type cutting machine 30 is controlled by the control apparatus. It operates at the designated timing and separates a series of labels 3 ...
Is supplied to the form 2 at a predetermined interval, that is, to a predetermined position of the form 2 before the roll 7d by the rotation of the second feed roll 31.

When the rolls 7d and 7d rotate, the foam 2 is heated by passing through the space between the metal plates 12 and 12, and the labels 3 are placed on the heated foam 2 one by one. Then, the label 3 and the foam 2 pass between the rolls 7d and 7d in a polymerized state. Roll 7 in this way
After passing between d and 7d, the label 3 comes into surface contact with the surface of the foam 2, whereby heat of the foam 2 is surely transferred to the label 3 side, and the heat melts the hot melt layer 24. Then, the label 3 is surely adhered to the surface of the foam 2 by the pressing force of the rolls 7d, 7d.

When the heating mechanism 5 composed of the metal plates 12 and 12 is provided in the horizontal direction as in this embodiment, the outlet side of the heating mechanism 5 can be arranged in the immediate vicinity of the roll mechanism 7. The heated foam 2 can reach the rolls 7d, 7d before being cooled, and the thermal efficiency is improved. In the present embodiment, the lower roll 7d may be provided with a heat source to heat the foam 2.

In each of the above-mentioned examples, the sheet to be adhered was preheated to cope with the ultra-high-speed processing, and thereafter, the sheet was superposed on the label and pressed by the roll mechanism. The sheet and the label may be pressed together and heated at the same time from the adhered sheet side. Even in this way, high-speed processing is possible, though not as much as in the above-mentioned embodiment. Then, in such a case, of at least the pair of rolls, a heater is provided on the roll on the side where the adherend sheet comes into contact to form a heating roll, and the label is polymerized on the adherend sheet and passed while being pressurized. At the same time, the adherend sheet is heated by a heating roll, and the heat from the adherend sheet whose temperature has risen is transferred to the label side, and the hot melt layer is melted by this heat and adhered.

The heating function 5 in the present invention is not limited to the one for passing between the metal plates 12 and 12 described above, and may have any configuration as long as it can heat the adherend sheet. For example, it may be heated by irradiating infrared rays or may be heated by warm air. Further, the roll function 7 is not limited to the number and size thereof as long as the label 3 and the adherend sheet can be pressed in a stacked state, and as described above, a heater may be provided. Further, the label supply function 6 is not limited to the one in which the label 3 is sandwiched between the rotary cutter type cutting mechanism 18 and the upper and lower magnetic belts 19 and 19 to transfer the label, as in the above-described embodiment. Three
Any structure may be used as long as it can be supplied so as to be superposed on the foam 2 one by one.

[0024]

As described above, according to the present invention, unlike the conventional sticking method and sticking apparatus 1 for heating a label, the sticking sheet is heated to heat the sticking sheet. Is transmitted to the label side to heat the hot melt layer, the hot melt layer can be melted in a short time without overheating the shielding layer, the peeling layer, and the like. Therefore, the label can be surely stuck onto the adherend sheet without destroying the shielding layer or the peeling layer even if the sticking treatment is carried out at an increased temperature, and the speed is much faster than in the past. Can be processed with. Further, since there is no fear that the shielding layer and the peeling layer are overheated, even a label using an aluminum thin film or an aluminum foil for the shielding layer can be attached at a high speed,
The release layer can be made of a material that is relatively weak to heat, and the structure of each layer of the label can be designed more freely.

[Brief description of drawings]

FIG. 1 is a perspective view of a sticking device.

FIG. 2 is a side view of the sticking device.

FIG. 3 is a side view showing a state where pressure is applied by a roll.

FIG. 4 is a side view of another embodiment of the sticking device.

FIG. 5A is a side view of a conventional sticking device that heats the label from the front side, and FIG. 5B is a perspective view thereof.

FIG. 6 is a side view showing a state in which pressure is applied by the sticking device shown in FIG.

FIG. 7 is a cross-sectional view of a conventional sticking device in which heating is performed mainly from the front side of a label by a heater inside a heating chamber.

[Explanation of symbols]

 1 Adhesive Device 2 Form 3 Label 5 Heating Mechanism 6 Label Supply Mechanism 7 Roll Mechanism 12 Metal Plate 16 Cutter Roll 17 Receiving Roll 18 Cutting Mechanism 20 Conveying Mechanism 21 Feeding Mechanism 24 Label Hot Melt Layer 25 Label Base Material 26 Label Shielding layer 27 Label release layer

Claims (4)

[Claims] 1. A label having a hot melt layer formed on the back side of a base material such as paper and an adherend sheet on which predetermined items are stated are superposed, and the label is applied to the adherend sheet by the hot melt layer which is heated and melted. In the method of sticking a hot-melt label for sticking, after heating the sheet to be stuck, the labels are superposed and pressed in a state where the hot-melt layer is in contact with the sheet to be stuck, and hot by the heat of the sheet to be stuck. A method for sticking a hot-melt label, which comprises sticking the melt layer after melting. 2. A label on which a hot melt layer is formed on the back side of a substrate such as paper and an adherend sheet on which predetermined items are described are superposed, and the label is applied to the adherend sheet by the hot melt layer heated and melted. In the method of sticking a hot-melt label for sticking, while pressing the sheet to be stuck and the label in a state of being superposed, heating from the side of the sheet to be stuck, hot melt by the heat from the sheet to be stuck A method for sticking a hot-melt label, which comprises melting and sticking layers. 3. A heating mechanism for heating an adherend sheet in which predetermined items are described, and a label having a hot melt layer formed on the back side of a base material such as paper, the hot melt layer on the heated adherend sheet. A label supply mechanism that supplies the sheet to be adhered in the state of being directed, and a roll mechanism that allows the sheet to be adhered and the label to pass while sandwiching them in a polymerized state, of a hot-melt type label. Sticking device. 4. At least a pair of rolls through which a label having a hot-melt layer formed on the back side of a base material such as paper and the like is superposed on the adherend sheet while pressurizing, and the adherend sheet among the rolls. A hot-melt label sticking device, comprising a heater for heating a roll in contact with the side, wherein the hot-melt layer is melted and stuck by the heat from the sticking sheet side.