EP0377085A2 - Device for applying an adhesive film - Google Patents

Abstract

A device for applying an adhesive film, which adheres to a carrier band wound up into a roll before the adhesive film is applied, comprises an application means (23; 123) by means of which the adhesive film (3; 103) is removed from the carrier band (4; 104) as it moves past. A return spool (11; 111) serves for receiving the carrier band (4; 104) after it has passed the application means (23; 123), a kinematic connection (13; 113) being present between the return spool (11; 111) and the carrier-band roll (7; 107). The device (1) for applying the adhesive film is distinguished by the fact that the unwound return spool (11; 111) has a diameter which is at least as large as the greatest possible diameter of the carrier-band roll, that return spool (11; 111) and carrier-band roll (7; 107) are arranged on a common axis (9; 109) and that the kinematic connection is designed as a disc coupling (13; 113). The disc coupling (13; 113) is preferably designed as a magnetic coupling (19, 21; 119, 121). <IMAGE>

Description

The present invention relates to a device for applying an adhesive film according to the preamble of claim 1.

Devices for applying an adhesive film to a base are known in which a carrier tape adheres to the adhesive film, is removed from a roll and is applied to the base via an application device. From this application device, the empty carrier tape is wound onto a rewind. A gear connection in the form of a gear pair is provided between the reel and the carrier tape winding, at least one gear being arranged on its shaft in such a way that slippage is possible between the gear and the shaft.

The disadvantage of this device is on the one hand the relatively complicated gear structure, which also leads to large dimensions of the device, with uneven weight distributions due to the changing winding sizes impairing the handling of the device or the device.

The object of the present invention is to provide a device for applying an adhesive film of the type mentioned at the outset, which is of simple construction and has small dimensions to increase manageability.

This object is achieved by the characterizing features of claim 1.

Characterized in that the still unwound reel has a diameter which is at least as large as the largest possible carrier tape winding diameter, that rewind and carrier tape reel are arranged on a common axis and that the gear connection as a disc clutch is formed, it is achieved that a simple gear connection between rewind and carrier tape winding is made, both a favorable weight distribution and small dimensions of the device are achieved.

The handling of the device according to the invention is further increased by the arrangement of the two rotating windings on one axis, since torques which act differently are avoided.

Further advantageous developments of the invention result from the subclaims.

A possible good formation of the disk clutch is made possible by the provision of friction disks, which allow slippage among themselves. Alternatively, the disk clutch can be designed as a ratchet or detent spring clutch.

A further advantageous and wear-resistant design of the disk clutch results from the provision of a magnetic clutch, for example formed from a magnetic film and a steel film.

If a guide pin is provided for guiding the empty carrier tape, particularly simple conveying and deflection of the carrier tape from the application device to the rewind is made possible. If two deflection pins are used, a particularly uniform and simple deflection of the carrier tape is achieved. For this purpose, the two deflecting pins are arranged at a distance from one another above the carrier tape roll and the rewind. The distance between the deflecting pins is advantageously approximately equal to the size of the outer diameter of the carrier tape roll that has not yet been unwound.

If deflecting pins are also provided, for example a total of three deflecting pins, two of which lie essentially in one plane and the planes are arranged essentially perpendicular to one another, a particularly uniform deflection of the carrier tape is achieved. In particular, it is possible that the running and running up carrier tape are rolled up from or onto the winding at almost the same point, namely in a plane perpendicular to the running or running direction. This has the advantage that the tensile forces exerted at these points by a carrier tape act on similar points, as a result of which torque differences only arise due to the different lever arms. This leads to a particularly smooth movement.

If the deflection rollers are arranged at different angles, particularly good guidance of the carrier tape from the unwinding area into the winding area is possible. Furthermore, the deflection pins can also be designed to be rotatable or as rollers, which enables the carrier tape to be conveyed particularly easily.

The application device can advantageously have an application lip which enables the adhesive to be wiped off the carrier tape particularly well. If the application lip is arranged to be pivotable on all sides, the adhesive can advantageously be applied during application in gradually changing planes without changing the position of the entire device. the device can be moved well by hand in the usual way and the adhesive in different levels. Directions for this are applied to the pad.

Lateral tape guide knobs are provided for better guidance of the carrier tape over the application lip.

According to a preferred embodiment of the device, a sleeve can be fitted on both sides, the one of the carrier tape windings being pulled up and the carrier tape being able to be wound onto the other sleeve. For this purpose, the sleeves are arranged so that they cannot rotate.

Rewind, carrier tape reel, their gear connection and the application device are preferably arranged together in a cassette, so that the individual parts can be handled particularly well together. The cassette and its parts can then be designed as a disposable part.

The cassette, in turn to facilitate handling of the device, is arranged in a housing so that it can be swiveled so that the used adhesive film can be exchanged quickly and together with the cassette.

A first locking device is advantageously provided which prevents the carrier tape from being conveyed as long as the cassette is not in its position in the housing. A second locking device then prevents the carrier tape winding from unintentionally moving in the wrong direction, namely against the conveying direction of the carrier tape.

• Fig. 1 eine schematische Teilansicht einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung zum Auftragen eines Klebstoffilms auf die Rückspule und den Trägerbandwickel, die auf einer gemeinsamen Achse angeordnet sind;
• Fig. 2 eine schematische Seitenteilansicht der erfindungsgemäßen Vorrichtung von Fig. 1;
• Fig. 3 eine Ansicht zur Verdeutlichung des getrieblichen Verbindungsbereiches der ersten Ausführungsform der erfindungsgemäßen Vorrichtung;
• Fig. 4 eine Teilansicht auf die Auftrageinrichtung der erfindungsgemäßen Vorrichtung; und
• Fig. 5 eine alternative Ausführungsform der ersten Ausführungsform der vorliegenden Erfindung mit einer Umlenkrolle;
• Fig. 6 eine Seitenansicht einer zweiten Ausführungsform der vorliegenden Erfindung mit einer Kassette und einem Gehäuse;
• Fig. 7 eine Draufsicht auf die mit den entsprechenden Teilen bestückte Kassette;
• Fig. 8 eine Schnittansicht einer bevorzugten Ausführungsform der Rückspule des Trägerbandes;
• Fig. 9 eine Ansicht von rechts auf die Rückspule von Fig. 8;
• Fig.10 eine Schnittansicht einer bevorzugten Ausführungsform der Magazinrolle;
• Fig.11 eine Ansicht eines Halterings für die Rückspule;
• Fig.12 eine Ansicht eines Halterings für die Magazinrolle;
• Fig.13 eine Ansicht einer bevorzugten Ausführungsform einer Magnetfolie;
• Fig.14 eine Ansicht einer bevorzugten Ausführungsfrom einer Stahlfolie;
• Fig.15 eine Seitenansicht der Stahlfolie von Fig. 14;
• Fig.16 eine Ansicht einer bevorzugten Ausführungsform der zweiten Arretiervorrichtung:
• Fig.17 eine Seitenansicht einer bevorzugten Ausführungsform der Auftrageinrichtung;
• Fig.18 eine Ansicht von links auf die Auftrageinrichtung von Fig. 17;
• Fig.19 eine alternative Ausführungsform der Scheibenkupplung in Seitenansicht; und
• Fig.20 eine Vorderansicht der Scheibenkupplung von Fig. 19.

Further details, advantages and features of the invention will become apparent from the following description with reference to the drawing. It shows:

• Figure 1 is a schematic partial view of a first embodiment of the device according to the invention for applying an adhesive film to the reel and the carrier tape roll, which are arranged on a common axis.
• FIG. 2 shows a schematic partial side view of the device according to the invention from FIG. 1;
• 3 shows a view to illustrate the gear connection area of the first embodiment of the device according to the invention;
• 4 shows a partial view of the application device of the device according to the invention; and
• 5 shows an alternative embodiment of the first embodiment of the present invention with a deflection roller;
• Fig. 6 is a side view of a second embodiment of the present invention with a cartridge and a housing;
• 7 shows a plan view of the cassette equipped with the corresponding parts;
• Fig. 8 is a sectional view of a preferred embodiment of the rewind of the carrier tape;
• Fig. 9 is a right side view of the rewind of Fig. 8;
• 10 shows a sectional view of a preferred embodiment of the magazine roll;
• 11 is a view of a retaining ring for the rewind;
• 12 shows a view of a retaining ring for the magazine roll;
• 13 shows a view of a preferred embodiment of a magnetic film;
• 14 shows a view of a preferred embodiment of a steel foil;
• 15 shows a side view of the steel foil from FIG. 14;
• 16 shows a view of a preferred embodiment of the second locking device:
• 17 shows a side view of a preferred embodiment of the application device;
• Fig. 18 is a view from the left of the application device of Fig. 17;
• 19 shows an alternative embodiment of the disk clutch in a side view; and
• 20 shows a front view of the disk clutch from FIG. 19.

As shown in FIG. 1, a device 1 according to the invention for applying an adhesive film 3 has a magazine roll 5 onto which a carrier tape roll 7, on which the adhesive film 3 adheres, is rolled up. The magazine roll 5 is rotatably mounted on an axis or shaft 9, which in turn is mounted in a housing (not shown). On this axis 9, a reel 11 is rotatably mounted, the outer diameter of which is at least the same size in the unwrapped state as the not yet unwound carrier tape adhesive film roll 7. Between the reel 11 and the carrier tape roll 7 on the magazine roll 5 there is a gear connection in Formed a disc clutch 13, which is formed from two disks 15 and 17. The disks can be friction disks, for example, the disk 15 being connected to the magazine roll 5 and the disk 17 to the rewind 11 in a rotationally fixed manner. The disks 15 and 17 can be designed as friction disks be that allow a slip between themselves.

In a preferred embodiment according to FIG. 3, the disc 15 has a magnetic foil 19 on the side facing the disc 17, and the disc 17 has a steel foil 21 on its side facing the disc 15. The magnetic foil / steel foil pairing results in a magnetic coupling, which in particular offers the advantage of an almost wear-free slip coupling.

2, the device according to the invention has an application device 23 with an application lip 25, which serves to enable the adhesive film 3 to be stripped off the carrier tape 4 carrying it. The carrier tape 4 then moves further over a first deflection roller 27, a second deflection roller 29, a third deflection roller 31 back onto the reel 11. The first, second and third deflection rollers 27, 29 and 31 are arranged so that two of them in each one level and the two levels are almost perpendicular to each other. This results in an essentially rectangular movement path starting from the first deflection roller 27, the winding-up point 35 lying in the same plane 36 as the unwinding point 33 of the adhesive film strip 3 and this plane 36 essentially perpendicular to the tangential unwinding or winding-up plane on the carrier tape roll 7 or the rewind 11 is. This enables a particularly good distribution of tractive force, with different torques only arising from the different length of the lever arm between the center point of the axis and the unwinding point 33 or winding point 35 and being partially canceled out due to the opposing forces.

The operation of the device according to the invention is as follows. A sufficient amount of carrier tape 4 is made from the carrier tape roll freshly placed on the magazine roll 5 drawn off until the carrier tape 4 reaches the reel 11 via the application device 23, the deflection rollers 27, 29 and 31 and can be fixed thereon. This can be done simply because the adhesive film 3 still adhering to the carrier tape 4 adheres to the reel 11. Of course, other options for fixing the carrier tape are conceivable, in particular if the carrier tape 4 is free of adhesive, for example by holding the carrier tape in a slot in the rewind, similar to film reels.

The application device 23 is placed with its application lip 25 on the base which is to be provided with the adhesive film 3. The entire device 1 is then moved in the direction of arrow A, which means that the carrier tape 4 with adhesive film 3 is pulled off the carrier tape roll 7 and wound onto the reel 11, which, because of its larger diameter, has to rotate more slowly than the carrier tape roll 7. However, since there is a gear connection between reel 11 and magazine roll 5 or carrier tape reel 7, the rewind 11 initially rotates at the same speed, but is immediately decelerated by the carrier tape adhering to it and rotates according to the unwinding dimension of the tape . Due to the constant braking of the rewinding rotation movement, the carrier tape 4 is therefore always kept under tension, so that a clean winding process of the carrier tape 4 onto the reel 11 is made possible.

Advantageously, the magnetic coupling largely prevents the adhesive tape or carrier tape 4 from tearing.

In Fig. 4, the application lip 25 is shown schematically and enlarged in front view. This is preferably suspended in such a way that it can be pivoted at least about the longitudinal axis of the conveying movement of the belt, which allows a particularly simple adaptation to various documents while maintaining the holding position of the device. However, it is preferably arranged to be pivotable on all sides. For better guidance of the carrier tape 4, the application lip 25 has lateral knobs 37 which prevent the carrier tape from sliding sideways.

The deflection rollers 27, 29 and 31 can also be arranged at different angles, which means a correspondingly good transfer of the carrier tape 4 from the unwinding area to the winding area, i.e. allowed from carrier tape reel 7 to rewind 11.

In a simplified embodiment according to FIG. 5, only one deflection roller 41 is provided for transferring the carrier tape 4 from the unwinding area to the winding area.

6 shows a preferred second embodiment of the device according to the invention. The device is arranged in a housing 145 which has walls 147 surrounding the device. The housing has a flap 149 which is pivotally arranged about a bearing 151. Preferably, the flap can be pivoted about 149 ^o an angle of about 90th The flap 149 serves to hold a cassette 153 and to secure it in position. For this purpose, it has a locking pin 155 which can be brought into engagement with a transverse locking pin, the locking pin connecting lateral walls 159 and 161 of the cassette 153 to one another.

The flap 149 also has a transverse wall 148 which closes the housing 145 after the flap 149 has been closed.

FIG. 7 shows a top view of the cassette 153, which is the parts of the application device an adhesive film. A carrier tape winding 107 is attached to a magazine roll 105, from which a carrier tape 104 is guided to an application device 123, and from there it is guided to a rewind 111 via deflection pins 141 and 142. The deflection pins 141 and 142 may be designed as a bent pin, the bend angle may be ^o ca 45th The deflecting pins 141 and 142 and the locking pin 157 can simultaneously serve to connect the two cassette housing walls 159 and 161 or simple plug connections are additionally provided so that the cassette walls 159 and 161 can be connected to one another in a simple manner. The cassette 153 is preferably designed as a disposable part and designed accordingly, ie the housing walls 161 and 159 and the pins 141, 142, 157 can be formed from plastic material. Alternatively, the pins can also be made of metal. A gear connection in the form of a disk clutch 113, which has two disks 115 and 117, is arranged between the magazine roll 105 and the rewind 107. As shown in FIGS. 1 and 3, foils are arranged between the disks, one foil being a magnetic foil 119 and the other a steel foil 121 (cf. FIGS. 13, 14 and 15).

It is also clear from Fig. 7 that the reel 111 is larger in diameter than the carrier tape winding 107, so that during application, i.e. Unwinding the carrier tape 104, the reel 111 always rotates slower than the carrier tape roll 107, whereby a tension is always generated in the carrier tape 104.

A preferred embodiment of the rewind 111 is shown in FIG. 8 in a sectional view and in FIG. 9 in a view from the right of FIG. 8. As can be seen in particular from FIG. 9, the rewinding coil 111 is designed in a ring-shaped manner such that an outer ring 112 is arranged around an inner ring 114 and the outer ring 112 is connected to the inner ring 114 via three struts 116, which are preferably arranged at an angle of 60 ^{° to} one another. The inner ring 114 has a ring gear 163 at its end on the housing side. A disk of the disk clutch 113 is integrally formed on the rewind 111. In the exemplary embodiment, it is the disk 115 which has a recess 165 which serves to hold a magnetic film 119. As can be seen from FIG. 9, the recess 165 has a symmetrical contour which is divided into two straight and two curved sections. It is thereby achieved that the magnetic film can be inserted in the recess 165 in a rotationally fixed manner. The inner bore or the inner recess of the ring 114 serves to receive a hollow shaft end 167 of the magazine roll 105, as shown in FIG. 10. There is a fit between the inside of the ring 114 and the outside of the hollow shaft stub or journal 167, which allows the magazine roll 105 to rotate with respect to the rewind 111. At the end of the magazine roller 105 on the housing side, a ring gear 169 is in turn formed, the teeth of which likewise extend in the radial direction.

Carrier tape sleeves 171 and 173 can be plugged onto the reel 111 on the one hand and onto the magazine roll 105 on the other hand, the carrier tape sleeve 173 in particular serving to receive the carrier tape roll 107. Since the carrier tape sleeves 171 and 173 have to rotate with the reel 111 or the magazine roll 105, a notch 175 is provided at at least one point on the circumference of the outer ring 112 or the magazine roll 105, and a corresponding groove on the carrier tape sleeves 171 and 173 respectively projection 177 and 179 extending on the inside. See in particular FIGS. 11 and 12.

To save weight, the magazine roll 105 can be similar to the rewind 111 can be formed from two concentric rings, which are also connected to one another by struts and are integrally connected to the disk 117 of the disk clutch 113. The disc 117 serves to hold and secure the position of the steel foil 121, as is shown in particular in FIGS. 14 and 15. To secure the position, the steel foil 121 preferably has two lugs 181 protruding in the axial direction on the outer circumference, which can be arranged in a corresponding manner in the notches 182 in the disk 117 in a manner fixed against relative rotation.

The toothed rings 163 and 169 together with corresponding toothed rings 183, which are provided in the side walls 161 and 159 of the cassette 153, serve as a first locking device 180. For this purpose, corresponding teeth are arranged in a lower region of an elongated hole, so that when rewinding 111 is inserted and the magazine roller 105, the sprockets 163 and 169 come to rest in the sprockets 183.

The mode of operation then continues to be such that the cassette 153 is placed on the flap 149. However, since the reel 111 and the magazine roll 105 must rotate freely during operation, a projection section 185 is provided in the housing 145 or on the flap 149, which extends between the housing wall 147 and the respective cassette wall 159 and 161 in such a way that when Insert the cassette 153, the sprockets 163 and 169 are lifted out of the sprockets 183, and the rewind 111 and magazine roll 105 are thus freely rotatable. This advantageously has the consequence that rewind 111 and magazine 105 can only move when the cassette 153 is securely accommodated in the housing 145, so that a correspondingly simple and quick application of the adhesive film can only take place when the housing is handled. The cassette 153 is fixed on its upper side by transverse pins 190.

In order to avoid that the carrier tape 104 can move in the wrong direction, namely counter to the conveying direction, as shown in FIG. 16, a locking finger 187 is provided as a second locking device on the side of the magazine roller 105, which then fits into the ring gear 169 engages, the teeth of the ring gear 169 being aligned such that the movement of the magazine roller 105 is possible in one direction of rotation.

For precise handling of the device, it has a specially designed application device 123, as can be seen particularly clearly from FIGS. 17 and 18. Pins are inserted through the two bores 124 and 126, which in turn connect the two walls 159 and 161 of the cassette 153 to one another. The application device 123 is thus fixed in its position in the cassette 153 with its application lip 125. For a simple and effective adaptation to the different movements of the operator to achieve a uniform application of the adhesive film, a cam 189 is provided, which is designed in the form of a rounded cone at the tip, so that by applying the application lip 125 to the tip of the cam 189 the application lip 125 becomes pivotable.

19 and 20, an alternative embodiment of the disk clutch 13 and 113 is shown. The disk clutch is designed as a ratchet or detent spring clutch 191. For this purpose, a first disc 192 has a detent spring 193, which extends in the radial direction on the circumference of the disc, wherein it is elastically deformable. Alternatively, of course, a plurality of detent springs 193 can also be provided. The detent spring 193 engages in a ring gear 195 which is formed in one piece with a second disk 194. The ring gear 195 projects axially in the direction of the first disc 192 so that it surrounds it (see Fig. 20).

In summary, it can be stated that the device for applying an adhesive film according to the invention creates a device which is small in size and easy to operate and in which good internal stability is achieved by arranging the main rotary elements on a common axis, as a result of which high unwinding speeds are also achieved can. Another advantage, which results in particular from the simple gear connection, is that the device can be made particularly light, so that prolonged use does not lead to premature fatigue of the operator.

Claims (21)

1. Apparatus for applying an adhesive film to a base which adheres to a carrier tape rolled up into a roll before application, with an application device with which the adhesive film is pulled off the carrier tape moving past, and with a rewind for receiving the carrier tape after the Passing the application device, wherein there is a gear connection between the rewind and the carrier tape reel, characterized in that the still unwound rewind (11; 111) has a diameter which is at least as large as the largest possible carrier tape reel diameter that the rewind (11; 111) and carrier tape windings (7; 107) are arranged on a common axis (9; 109), and that the gear connection is designed as a disk clutch (13; 113). 2. Apparatus according to claim 1, characterized in that the disc clutch is designed as a friction disc clutch, which allows slippage of the carrier tape roll (7; 107) relative to the rewind (11; 111). 3. Apparatus according to claim 1, characterized in that the disc clutch (13; 113) is designed as a ratchet or detent spring clutch (191). 4. The device according to claim 1, characterized in that the disc clutch (13; 113) is designed as a magnetic clutch, which allows a slip of carrier tape reel (7; 107) against rewind (11; 111). 5. The device according to claim 4, characterized in that the magnetic coupling from a magnetic film (19; 119) and a steel foil (21; 121) is formed. 6. Device according to one of claims 1 to 5, characterized in that for guiding the carrier tape (4; 104) between the application device (23; 123) and rewind (11; 111) at least one deflection pin (41; 141) is provided. 7. Device according to one of claims 1 to 6, characterized in that two deflecting pins (141, 142) are provided. 8. The device according to claim 7, characterized in that the two deflecting pins (141, 142) above the carrier tape roll (7; 107) and the rewind (11; 111) are arranged at a distance from one another. 9. The device according to claim 8, characterized in that the distance between the deflecting pins (141, 142) corresponds approximately to the initial diameter of the carrier tape roll (7; 107). 10. Device according to one of claims 1 to 9, characterized in that three guide pins (27, 29, 31) are provided for guiding the carrier tape (4; 104) between application device (23; 123) and rewind (11; 111), two each lying essentially in one plane and the planes being arranged essentially perpendicular to one another. 11. Device according to one of claims 5 to 10, characterized in that the deflecting pins (41; 27, 29, 31; 141, 142) are arranged at different angles. 12. Device according to one of claims 5 to 11, characterized in that the or the deflecting pin (41; 27, 29, 31) are rotatable. 13. Device according to one of claims 1 to 12, characterized in that the application device (23; 123) has an application lip (25; 125) over which the carrier tape (4; 104) is guided. 14. The apparatus according to claim 13, characterized in that the application lip (25; 125) is arranged pivotably at least about the adhesive film conveying axis. 15. The apparatus according to claim 14, characterized in that the application lip (25; 125) is arranged pivotable on all sides. 16. The device according to one of claims 13 to 15, characterized in that the application lip (25; 125) has lateral band guide knobs (37; 137). 17. The device according to one of claims 1 to 16, characterized in that a sleeve (171,173) between the rewind (11; 111) or magazine roll (5; 105) is provided both on the adhesive roll side and on the rewind side, each of which is rotationally fixed and is detachably attachable. 18. Device according to one of claims 1 to 17, characterized in that a cassette (153) is provided which receives the reel (11; 111), the carrier tape reel (7; 107), the gear connection and the application device. 19. The apparatus according to claim 18, characterized in that the cassette (153) in a housing (145) is pivotally positionally secured. 20. Device according to one of claims 18 or 19, characterized in that a first locking device (180) is provided which prevents rotation of the reel (11) and / or the magazine roll (5) in the cassette (153) when the The cassette (153) is not in the order (145). 21. Device according to one of claims 18 to 20, characterized in that a second locking device (187) is provided in the cassette (153), which prevents rotation of the carrier tape roll (7; 107) against the carrier tape conveyor device.

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