EP1222131B1 - Manual device with a return stop for transferring a film from a backing strip onto a substrate - Google Patents

Abstract

A hand device for transferring a film, of, for example, adhesive, covering, or colored material, from a backing strip to a substrate. A supply spool and a take-up spool for the backing strip are rotatably mounted in a housing. An applicator tip is arranged on the housing and includes an application edge around which the backing strip runs. Furthermore, a brake mechanism, active during the functional operation of the hand device is provided. The brake mechanism has a locking device which interacts with one of the spools. To guarantee a compact design and economical fabrication, the locking device is arranged to be integral with the applicator tip.

Description

The invention relates to a hand-held device according to the preamble of claim 1.

A hand-held device of this type is previously known from DE 42 20 712 C2. With this A spool and a take-up spool are rotatable in one housing stored, with a wound on the supply spool carrier tape from the Supply spool extends to an application part arranged on the circumference of the housing, around a spatula of the application part protruding outwards from the housing is folded and extends to the take-up spool. To transfer a movie from Carrier tape on a substrate is manually gripped with the handheld device Application tip pressed against the substrate and at the same time moved on the substrate so that the carrier tape adhering to the substrate is removed from the supply reel is running around the spatula of the application part and onto the take-up reel is wound up. There is one between the supply reel and the take-up reel Drive connection provided or effective, which is used by the Subtract the torque transferred to the supply spool so the take-up spool drives that it tries to wind up the carrier tape at a speed that is greater than the take-off speed, but between the supply spool and the take-up reel is provided with a slip clutch, which ensures that the waste Winding speeds are the same and that a certain tension im on the Winding reel running up carrier tape is not exceeded. This is ensures that the carrier tape is always wound with a certain tension is, rupture of the carrier tape due to the slip clutch excluded is. The supply spool and the take-up spool can be on a common one Axis of rotation, ie side by side, may be arranged, or the supply spool and the Winding spool can be arranged axially parallel in the plane of rotation of the carrier tape be, the take-up spool between the supply spool and the application part is arranged as z. B. is described in DE 42 20 712 C2.

In the handheld device that can be removed from DE 42 20 712 C2, the drive connection between the supply reel and the take-up reel with integrated slip clutch formed by at least one pair of directly engaging friction surfaces on mutually opposite inner and outer sides of the disc-shaped Coil walls are formed. Due to the rotational driving between the coils To ensure effective friction on the friction surfaces, one is required Compression with which the friction surfaces press against each other or are preloaded. The compressive stress is in the hand-held device which can be found in this publication formed in that at least one of the two friction surfaces, preferably both Friction surfaces, on and arranged in a flexible manner transversely to the relevant friction surface a spring force, preferably biased against one another by inherent elasticity Coil sections, in particular by the coil walls themselves, are formed. The The effectiveness of the rotary drive can be due to interlocking knobs or teeth are enlarged with which the coil sections interlock. It is also there possible that the coil sections are not biased against each other, but the Rotational entrainment is based on the fact that at least one of the coil sections at mutual impact of the knobs or teeth laterally resilient dodge and thereby creates a section modulus on which the Rotational entrainment between the knobs or teeth is based.

In the known hand-held device, one cooperates with the take-up spool Backstop provided to prevent misuse of the handheld device in a reverse position a peeling of the carrier tape from the take-up reel and a Avoid loops on the carrier tape. In the known embodiment the backstop is formed by a pawl drive, consisting of a the peripheral edge of one of the winding spool walls arranged ring gear, which with interacts with a ratchet arm that extends secantially to the ring gear and is so acted upon by a spring force against the ring gear that at one Direction of rotation in the winding reel direction of the pawl arm runs over the ring gear and in the opposite direction of rotation by engaging the ring gear Reverse rotation of the take-up spool and thus a loop formation of the carrier tape locks. The latch arm is connected to the by a plug connection Housing side wall or the lid of the housing connected.

EP 0 606 477 A1 describes a hand-held device for transferring a film from one Carrier tape described on a substrate, which is from a supply spool extending carrier tape also wraps around an application part and forms one Winding spool extends. This known handheld device has a locking mechanism to lock the rotation of the supply roll when the handheld device is in a position Is not in use position. For this, the order part is between one extended non-use position and an inserted use position slidably supported, one from the inner end of the application part Pawl arm bypassing the take-up spool to the extent of the behind the Winding spool arranged supply spool extends. It is also a stationary Steering part arranged on the existing housing in such a position that when Moving the order part in its use position the latch arm laterally is bent out so that it does not function with a ring gear on the supply roll can kick. Moved when moving the order part to its non-use position the latch arm in its with the ring gear on the supply spool interacting locking position. This known locking mechanism is one of them suitable, a loop formation of the carrier tape in the inoperative position of the Avoid handheld devices. A loop formation, which in the non-use position z. B. due to the inherent elasticity of the carrier tape or in the use position Moving the handheld device in the wrong direction can result in this handheld device cannot be avoided.

The invention has for its object in a handheld device of the beginning specified type to simplify the construction. In addition, one should be simple mountable, inexpensive to manufacture and / or a construction with as little as possible Individual parts are handed over.

This object is solved by the features of claim 1. advantageous Developments of the invention are described in the subclaims.

In the hand-held device according to the invention, the braking part of the reverse brake is by a formed in one piece from the application part extending in the direction of the associated spool extends and with this for execution of the backstop interacts. This design avoids multiple parts and enables simple Manufacturing, storage and assembly, which reduces manufacturing costs to let.

In the context of the invention, the reverse brake or lock with the supply spool or the take-up reel interact. This is due to the self-locking Possible effect of the drive connection between the coils.

In the subclaims are included the features that are too small and functional good designs that can be advantageously integrated into the handheld device.

Fig. 1 ein erfindungsgemäßes Handgerät in der Seitenansicht und im Schnitt gemäß Line I - I in Fig. 2;

Fig. 2 das Handgerät im Schnitt gemäß Linie II - II in Fig. 1;

Fig. 3 einen der Fig. 2 entsprechenden Schnitt in abgewandelter Ausgestaltung;

Fig. 4 einen der Fig. 2 entsprechenden Schnitt durch ein Handstück in weiter abgewandelter Ausgestaltung.

The invention and further advantages which can be achieved by means of exemplary embodiments are explained in more detail below. Show it:

1 shows a hand-held device according to the invention in side view and in section along line I - I in FIG. 2;

Figure 2 shows the handheld device in section along line II - II in Fig. 1.

3 shows a section corresponding to FIG. 2 in a modified embodiment;

Fig. 4 is a section corresponding to FIG. 2 through a handpiece in a further modified embodiment.

Based on the two sectional views of FIGS. 1 and 2, a first is first Embodiment of a hand-held device for transferring a film from a carrier tape described in more detail on a substrate. The one with an order bar Handheld device is particularly suitable for transferring films from an opaque and / or colored material; for transferring an adhesive film is preferred a pressure roller is used instead of the application bar.

The hand-held device according to the first exemplary embodiment essentially comprises a housing 1 consisting of one - seen in the position of use - right and left Housing part 2, 3, a supply spool 4 rotatably mounted in the housing 1, one in the housing 1 rotatably mounted take-up reel 5 and an application device 6 in the form of a Application bar, or part of the order, through an outlet opening 7 in the housing 1 its lower front corner area (use position) from the housing 1 protrudes. A carrier tape 8 coated on one side with a film is of the Supply spool 4 led around the applicator bar 6 to the take-up spool 5.

All parts of the handheld device described above and still to be described consist of Plastic and can be made with the exception of the carrier tape 8 by injection molding become.

The two bobbins 4 and 5 are arranged radially offset from one another and are seated each rotatably mounted on a hollow, attached to the housing part 2 Axle journal 9 or 10. At least the supply spool 4 is through on both sides delimits a projection 11 which is arranged on the associated housing part 2, 3 and which runs concentrically to the journal 9 around it, so that the supply spool 4 is positioned in the housing 1 such that the carrier tape 8 exactly in the Center of height of the housing 1 and at the level of the part 6 to be described runs. The left housing part 3 has two pins 16, 17 which in the Recesses in the journal 9, 10 of the housing bottom 2 are pressed in and close the housing 1 of the handset securely.

The supply spool 4 is preferably in one piece at each of its two axial ends provided with a coil wall 12, 13 in the form of a radial disk. The left Coil wall 13 is thicker and slotted with an outer coil wall 13a The depth of the slot 14 is approximately 5 mm and the width of the slot 14 can be about 1 mm. The diameter of the left coil wall 12 is somewhat dimensioned smaller than the diameter of the right coil wall 13, whereby a Assembly gap arises. The carrier tape is between the two coil walls 12, 13 8 out, the supply spool 4 up to the larger outer diameter of the right Coil wall 13 can be wound.

At the left axial end of the take-up spool 5 here, too, is preferably in one piece a disc-shaped coil wall 15 attached, the outer diameter of this Coil wall 15 is substantially smaller than the outer diameter of the coil walls 12, 13 of the supply spool. The thickness of the coil wall 15, the outer diameter of the Coil walls 13 and 15 and the mutual distance between the two coils 4 and 5 are dimensioned such that the coil wall 15 in the slot 14 of the coil wall 13th can intervene. The thickness of the coil wall 15 of the supply coil 4 is somewhat dimensioned larger than the width of the slot 14 of the supply reel 4 and the radial Engagement surfaces of the coil wall 15 and / or the coil walls 13, 13a can be one or be roughened on both sides, so that the two bobbins 4 and 5 are in direct frictional contact with one another.

For transferring the outside of the carrier part 8 in the area of the application part 6 arranged film on a substrate, the handheld device 1 is gripped with one hand, with a spatula 6a forming the front end of the application part 6 The substrate is placed and under slight pressure against the substrate in the in Fig. 1st shown arrow direction moves, the carrier tape 8 from the supply reel 4th is withdrawn and wound on the take-up reel 5, and wherein the film is detached from the carrier tape 8 on the spatula 6a and remains on the substrate.

The effective winding diameters d, d1 and engagement diameter D, D1 of the coils 4, 5 are coordinated so that the winding speed of the Winding reel 5 would always be slightly larger than the unwinding speed of the Supply spool 4. This drive connection and rotary driving takes place through the if necessary by knobs or teeth or if necessary by a roughened Surface increased frictional contact of the coils, which in the present embodiment by the clamping engagement of the coil wall 15 between the coil walls 13, 13a is achieved. As a result, a slip clutch K is formed, which is driven by frictional rotation works, the turning entrainment if necessary by knobs or teeth or a roughening of the friction surfaces can be forced.

The frictional rotation thus formed between the supply spool 4 and Take-up reel 5 ensures a through the appropriate torque transmission Drive and slip effect, which causes the take-up spool 5 at all times is driven at a speed that the carrier tape 8 is always slightly tensioned and never tears. The above-described design of the drive connection 13, 14, 15 with Friction drive has the advantage that a biasing of the frictional effect with each other standing elements is not required. Characterized in that the coil wall 15 in Slot 14 of the coil wall 13 is clamped, is a constant at all times Frictional force between the coils 4, 5 guaranteed.

Due to the engagement of the coil wall 15 in the slot 14, the Winding spool 5 on the sleeve-shaped journal 10 in the axial direction positioned.

The application part 6 has at its end located in the housing 1 in Cross-section preferably polygonal, for example square, pin 18, of the corresponding receptacles 19 and 20 on the housing part 2 and 3 non-rotatable is included. The strip-shaped application part 6 is preferably rigid with the Pin 18 connected, the spatula 6a itself from a soft, deformable plastic material can exist. Alternatively, the Application spatula 6a rigid and with an elastic intermediate piece with the Pin 18 may be connected.

In order to avoid loop formation in the carrier tape 8, the housing 1 is in the A reverse brake 21 for the supply reel 4 or the take-up reel 5, which has a braking part 22 which is in one piece on a part of the handheld device, for. B. on a housing part 2, 3 preferably in one piece at the inner end of the application part 6 is molded and in the present embodiment with the coil when exercising a braking function cooperates, which is arranged adjacent to the application part 6. As can be seen in particular from FIG. 2, the braking part 22 is by an arm or better for stability reasons by a parallel to the plane of circulation E des Carrier tape 8 extending disc or bar formed which extends into the slot 14 extends into and at least in this area is dimensioned so thick that it with a limited clamping action between the coil walls 13, 13a. The The clamping effect is due to the excess thickness and the elastic tension with which the coil walls 13, 13a clamp the braking part 22 between them. If the supply spool 4 rotates in the functional mode, the braking effect of the Reverse brake 21 depressed, d. H. the reverse brake 21 slips.

In order to increase the braking effect with as little lateral clamping tension as possible, can the coil walls 13, 13a and the brake member 22 in the area of their frictional contact mutually engaging surfaces in the area of at least one pair of surfaces be roughened on both sides, or lying one behind the other in the circumferential direction have arranged knobs or teeth that interlock and when they meet each other cause an increased turning entrainment. As part of the Invention it is also possible to couple on one or both engagement surface pairs to arrange knobs or teeth on the coil walls 13, 13a and the braking part 22, wherein the coil walls 13, 13a do not clamp the braking part 22 per se between them but the rotational driving is achieved in that when turning the associated Coil the knobs or teeth on the associated coil part on a pitch circle are arranged to meet, the coil walls 13, 13a axially elastic dodge and thereby generating rotational driving torque.

The above-described embodiment of FIG. 2 is not limited to that the slot 24 also part of the rotary driving connection or slip clutch K between the coils 4, 5. In the context of the invention, this rotary driving also take place otherwise, so that the slot 14 is only part of the reverse brake 21 is.

3, in the same or comparable parts with the same reference numerals, differs from the above Embodiment in that the brake member 22 is not between two coil walls engages but on one side with an axial elastic tension on the coil wall 12 or 13 is applied, preferably on the outside. With this configuration, the Coil wall 13a in failure. The axial elastic tension is generated in that the braking part 22 with respect to the coil wall 13 with such an axial offset is prefabricated that it is slightly bent axially in the assembly position on the Coil wall 13 abuts and due to this axial tension, the clamping effect and resulting friction effect is generated for rotary driving. This requires no special adjustment of the brake part 22 in the axial direction. The positivation takes place during the assembly of the brake part 22 by the form-fitting holder. ever according to the thickness of the coil wall 13 and the braking part 22, the thinner part or Both parts will bend axially, with respect to the degree of deflection Sets equilibrium state. This also applies to the coil walls 13, 13a Embodiment according to Fig. 2nd

In this exemplary embodiment, too, the rotational driving can be forced that knobs or teeth in the circumferential direction on the engagement surfaces are arranged one behind the other, which when the associated coil 4 rotates, 5 meet and by axially bending one or both parts as well generate the rotational driving torque due to the resulting resistance.

In this exemplary embodiment too, the coil wall 13 and the braking part 22 on their engagement surfaces with teeth arranged one behind the other in the circumferential direction or studs, so that the coil wall 13 and the braking part 22 are not in themselves axially clamp against each other, but the rotary drive is generated in that when rotating the coil of the at least one knob or tooth on the braking part 22 and the Knobs or teeth meet on the coil wall 13 and the braking part 22 and / or dodge the coil wall 13 axially elastically.

3 is a drive connection or Slipping clutch K is provided between the coils 4, 5, in which the coil walls 12, 13, 15 overlap each other in a fork shape, the engagement surfaces in question one or both sides of friction surfaces, roughened friction surfaces or with knobs or Teeth can be friction surfaces, as per the reverse brake according to Fig. 3 has already been described, so that a further description in Individuals can be dispensed with.

4, in the same or comparable parts with the same reference numerals, is different from those described above Embodiments in which the rotary driving elements can dodge axially a pawl drive 2 between the associated spool, here the supply spool 4 or the coil wall 12 and a preferably disc-shaped pawl arm 2 intended. The pawl drive 2 as a special development of the reverse brake 21 is by a ring gear with teeth 26 on a pitch circle on the coil wall 12 and at least one tooth 27 which engages in the tooth gaps on the brake part 22 educated. The teeth are sawtooth-shaped so that in the reverse direction the steep tooth flanks 28 meet each other and thereby a return movement the associated coil is locked. In the direction of rotation, which is correct Functional operation sets, one or both parts yield elastically.

In the above-described exemplary embodiments, the braking part 22 or the pawl arm 25 in particular from the thru-axle 18 of the application part 6 straight inside.

The reverse brake 21 or the pawl drive 24 according to the invention can be easy, quick and inexpensive to manufacture, especially if the associated parts consist of plastic and are manufactured by injection molding.

In the embodiments in which knobs or teeth for Rotational drive connection are present, arises in the correct direction of rotation Coil a chatter. In the context of the invention, the reverse brake 21 or the pawl drive 24 with the supply spool 4 or the take-up spool 5 interact. When interacting with the supply spool 4, the Rotary drive connection or slip clutch K so self-locking on the Take-up reel 5, that the reverse rotation is largely avoided. On Interaction of the reverse brake 21 or the pawl drive 24 with the Take-up reel is even more effective.

Claims (10)

1. Hand device for transferring a film of adhesive, covering or coloured material, for example, from a backing strip (8) to a substrate, with a housing (1), in which a storage spool (4) and a winding spool (5) for the backing strip (8) are rotatably mounted, with a spatula-shaped application part (6) arranged on the housing (1), around which the backing strip (8) runs, and with a return brake (21) or return lock (24) active in functional operation, which brake or lock has a brake or locking part (22, 25) which interacts with one of the spools (4, 5), characterised in that the brake or locking part (22, 25) is designed to be integral with the application part (6).
2. Hand device according to claim 1, characterised in that the brake or locking part (22, 25) interacts with a spool wall (13), preferably by a friction drive or ratchet drive.
3. Hand device according to claim 1 or 2, characterised in that the brake or locking part (22, 25) extends preferably in a straight line, in particular parallel with the plane of rotation (E) of the backing strip (8).
4. Hand device according to one of the preceding claims, characterised in that the brake or locking part (22, 25) is formed by a flat strip or disc.
5. Hand device according to one of the preceding claims, characterised in that the brake part (22) engages in a clamping manner into a slot (14) which is preferably arranged in the spool wall (13).
6. Hand device according to one of claims 1 to 4, characterised in that the brake part (22) and the spool (4, 5) overlap laterally and are prestressed against each other by an elastic force along the axis of rotation of the spool (4, 5).
7. Hand device according to claim 6, characterised in that the spool (4, 5) and/or the brake part (22) are prestressed against each other by intrinsic elasticity.
8. Hand device according to claim 6 or 7, characterised in that the engaging surfaces on the spool (4, 5) and on the brake part (22) are rough or are provided with knobs or teeth which are arranged in a row running in the peripheral direction.
9. Hand device according to one of claims 2 to 4, characterised in that the spool (4, 5) and a ratchet arm (25) overlap laterally and flexibly, and have ratchet teeth (26, 27) on their sides facing each other, the ratchet teeth (26) of which are arranged on the spool (4, 5) on a part of a circle.
10. Hand device according to one of the preceding claims, characterised in that the brake or locking part (22, 25) interacts with the storage spool (4) or the winding spool (5).

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