EP1200332B1 - Hand-operated device for transferring a film from a support strip to a substrate - Google Patents

Abstract

The invention relates to a manual device for transferring a film consisting for example of adhesive, covering or coloured material from a backing strip to a substrate, with a housing in which a supply reel and a take-up reel for the backing strip are mounted so that they can rotate via a pivot bearing, which is formed by two coaxially arranged bearing components, engaging in each other like sleeves in the region of an annular or hollow cylindrical bearing joint, of which one bearing component is held on the housing so that it cannot rotate and the other bearing component is a part of the relevant reel support and in the course of which a return stop is provided for both reels with a locking pawl which meshes with a gear ring. To guarantee a compact design and economical fabrication, the locking pawl is arranged on the one bearing component against a spring force so that it yields elastically and the gear ring is arranged on the other bearing component.

Description

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

With a handheld device of this type, the film is pulled off in the functional mode the supply reel caused by the manually generated movement with which the Hand device is moved along the substrate, whereby the film detaches from the carrier tape and the carrier tape is simultaneously unwound from the supply reel and onto the Winding spool is wound. To ensure this functional operation, must the take-up speed on the take-up reel must be at least as great as that Unwinding speed on the supply reel, otherwise it will occur during winding Form loops that can cause the handheld device to malfunction. For this special functional purpose is a drive connection between the Supply spool and the take-up spool provided that the take-up spool in one such translation drives that the winding speed effective on it is greater than the unwinding speed on the supply reel. It is too take into account that the effective winding diameter of the supply spool and the Take-up reel change continuously. This problem is solved in that the Drive connection drives the take-up spool so quickly, on the one hand, that, on the one hand the winding speed effective at it is always equal to or greater than that Unwinding speed, even if the winding diameter of the Take-up spool is maximum and the winding diameter of the supply spool is minimal and on the other hand the drive connection works with such a slip that the take-up spool is driven with a constantly effective torque, so that the winding carrier tape section is tensioned, but at the same time the Slip in the drive connection takes effect, so that the rewound Carrier tape section does not tear.

Another problem with the function of an existing handheld device is that both the supply reel and the take-up reel tend to each after one by pulling off the carrier tape caused by rotary motion to run back, which can be caused by tensions in the carrier tape. Such a return of the coils can also create small loops, that can impair the function of the handheld device.

A hand-held device of the type described above is, for example, in EP 0 267 396 B2, EP 0 680 914 D1, EP 0 656 308 D1 or DE 39 00 156 C2. At a In the present hand-held device, the supply reel and the take-up reel can be moved by one Spacing axes of rotation can be rotatably mounted or they can also be rotatable about a common axis of rotation, as is known from DE 39 00 156 C2 can be seen.

In the hand-held device described in EP 0 267 396 B2, the drive connection is between the supply reel and the take-up reel by a gear drive with a Intermediate gear formed, the backstop with the intermediate gear cooperates and is formed by at least one spring tongue on the housing is attached and with its free end resiliently with the teeth of the intermediate gear interacts, whereby it extends secantial to it. This known configuration is not only multi-parted, it also requires a relatively large one Space because both the idler gear and the spring tongue outdoors The interior of the housing is to be accommodated.

In the handheld device described in EP 0 680 914 B1, in which the drive connection formed between the supply reel and the take-up reel by a friction wheel drive is a backstop for the take-up spool through a spline on the radial end face of a bearing bush of the take-up reel (Fig. 3), the Face teeth with counter teeth on an opposite fixed to the housing Surface interacts. In this known embodiment, the take-up spool in Functional operation when turning the backstop small axial movements run, both for the friction wheel drive and for winding the Carrier tape are unfavorable, with an additional spring element is to be provided that the take-up reel with its face gear against the Counter toothing applied.

A configuration similar to the configuration described above is in one Handheld device according to EP 0 656 308 B1 provided. In this known embodiment the drive connection between the supply reel and the take-up reel also formed by a friction wheel drive, the backstop with the take-up spool cooperates and through one in a recess one on the take-up reel arranged friction wheels arranged ratchet arm is formed on its free End has a pawl and elastic with this against a spline is biased, which is formed on an additional toothed ring, which is fixed to the housing an inner surface of the housing is arranged. Even with this well-known Design requires an additional component, namely the toothed ring, wherein in addition, despite the elastic flexibility of the latch arm, it can be expected that when the backstop is overturned, the take-up spool makes axial movements or at least to perform axial movements. That's why with to expect increased wear, because only for storing the take-up reel a relatively small ring area is available on the bobbin.

DE 39 00 156 C2 describes a hand-held device in which the supply spool and the Winding spool are arranged side by side in a coaxial arrangement, the Drive connection arranged between the adjacent coil walls and is formed by a clutch tooth on one of the one coil wall initially protruding radially and then extending in the circumferential direction Spring arm is arranged and thus radially movable and with an elastic Preload the spring arm radially outwards against one ring gear on the other Coil wall is applied. The teeth of the ring gear and the clutch tooth have inclined tooth flanks, so that the coupling tooth when a determined tensile stress in the winding section of the carrier tape from the tooth gaps is displaced and the described slip takes place in the drive connection. This known configuration is therefore a slip clutch in the drive connection between the coils, both parts Turned parts. This slip clutch cannot function as a backstop fulfill. That is why there is a backstop which interacts with the supply reel provided, which is formed by a locking finger with a ring gear on the Supply spool cooperates in the sense of a ratchet lock. This configuration too the backstop is complex and of large construction, being for the locking finger an interior of considerable size must exist to make it work to be able to order. This also leads to a large design of the handheld device all in all.

The invention has for its object a handheld device of the type specified Art to design so that while ensuring a small size inexpensive manufacture is possible.

This object is solved by the features of claim 1.

In the embodiment according to the invention, one of the existing ones is coaxial interlocking bearing parts a pawl elastic against a spring force resiliently arranged on one bearing part, and the ring gear is on the other Bearing part is arranged.

The configuration according to the invention is not only characterized by a small construction which can be arranged within the axial projection range of the bearing parts and which therefore hardly affects the interior of the housing, but rather it also enables the pawl lock to function securely between the bearing parts, the associated coil does not participate in the movements of the pawl and the Pawl can therefore remain in position axially in its functional operation. In addition, the configuration according to the invention can be produced in a simple manner, with little material being used, since the pawl according to the invention Ensuring a safe function can be trained in a small design.

It is advantageous to arrange the pawl in a radially movable or radially flexible manner. Here, radially adjacent free spaces can be used with respect to the pawl be in which the pawl can move, for. B. the free interior of the Housing or a free interior space within the inner bearing part, in particular if the latter for reasons of material and weight savings by one hollow cylindrical bearing pin is formed.

If the pawl is located at the free end of a jack, it is necessary no additional spring element to act on the pawl in their Functional position, since the intrinsic elasticity of the latch arm is used as spring force can be. It is possible in the context of the invention that the latch arm itself extends parallel to the axis of rotation of the associated coil or in an arc around the The axis of rotation is curved. The latter enables in particular a narrow one Construction, since the length of the latch arm is usually larger than its width.

The embodiment according to the invention also enables a small construction in that respect axial direction, since the pawl lock can be arranged in the area in which the bearing parts overlap, i.e. in the storage area. The latch lock in the Area of a recess of the bearing part in question. This will Free space created in which the latch lock can move.

It is also advantageous to the toothed ring of the pawl lock in the bearing part in question sunk to arrange, while the latch is arranged so that it is in its Working position between the bearing parts in particular hollow cylindrical Overlying the bearing joint and engaging in the tooth gaps of the ring gear. With one Embodiment is the axial assembly of the bearing parts when installing the Handset not affected because the pawl when pushed together axially can dodge radially and therefore not relevant edges of the other bearing part in Way stands. It is further advantageous to have two pawls each other to be arranged opposite, which creates a locking effect with slight flexibility the pawls can be enlarged. It is advantageous to use a pawl to move in the circumferential direction so that when the pawl is in a Tooth gap, the other pawl is on a tooth of the ring gear located. This means that even with relatively obtuse tooth angles Small locking sections are desired for reasons of ease of movement Back movement of the coil in question is reached, causing a loop formation is effectively countered.

The configurations according to the invention can be made in one piece on the existing ones Form parts so that no additional parts are required. It is suitable for this in particular a manufacturing process by injection molding, especially when the associated components of the handheld device are made of plastic. At all Embodiments of the invention is thus the pawl between the bearing parts effective, namely in a region of the cavity of the housing in which the Pawl does not disturb the cavity and therefore does not disrupt the course of the carrier tape can disturb.

Fig. 1 ein erfindungsgemäßes Handgerät in der Seitenansicht bei geöffnetem Gehäuse;

Fig. 2 eine erfindungsgemäße Spule (Vorratsspule oder Aufwickelspule) in einer Ansicht quer zu ihrer Drehachse;

Fig. 3 die Spule nach Fig. 2 in ihrer axialen Ansicht, teilweise geschnitten;

Fig. 4 das Handgerät mit geschlossenem Gehäuse jedoch teilweise aufgebrochen in der Draufsicht, wobei eine Aufwickelspule in einer etwas anderen Ausgestaltung vorhanden ist;

Fig. 5 den Teilschnitt V-V in Fig. 4 in vergrößerter Darstellung.

The invention and further advantages which can be achieved by means of advantageous configurations and drawings are explained in more detail below. It shows

1 shows a hand-held device according to the invention in a side view with the housing open;

2 shows a spool according to the invention (supply spool or take-up spool) in a view transverse to its axis of rotation;

Fig. 3, the coil of Figure 2 in its axial view, partially in section;

4 shows the hand-held device with the housing closed, but partially broken open, in plan view, with a take-up reel in a somewhat different embodiment being present;

Fig. 5 shows the partial section VV in Fig. 4 in an enlarged view.

The handheld device, generally designated 1, is used to hold one on a carrier tape 2 arranged film to transfer to a substrate, the carrier tape 2 on a Supply roll 4 and a take-up roll 5 in a housing 6 of the handheld device 1 is arranged. An application part 7 protruding from the housing 6 is provided in order to the carrier tape 2 runs. By manually pressing the application part 7 on the substrate simultaneous displacement of the handheld device 1, the carrier tape section 2a of pull off the supply roll 4, wherein it automatically as the carrier tape section 2b on the Winding roll 5 is wound up.

In the present embodiment, the supply roll 4 and the take-up roll 5 about two axes of rotation 8, 9 at a distance from one another in the Wrapping plane E of the carrier tape 2 is rotatably supported.

The associated rotary bearings 11, 12 for the coils 4, 5 are each by a non-rotatably held directly or indirectly on the housing 6, preferably hollow cylindrical bearing pin 13, 14 formed, on which the associated coil 4, 5 with a preferably hollow cylindrical bearing bush 15, 16 is rotatably mounted. The Axial positioning of the coils 4, 5 can be associated with each other opposite walls of the housing 6 may be formed. The ring-shaped or hollow cylindrical bed joint between the bearing parts is designated by 10.

The coils 4, 5 each have a cylindrical winding body on which the Carrier tape 2 is or is wound up, and which in each case through the bearing bush 15, 16th can be formed. In addition, the coils 4, 5 have one or both sides each have a disk-shaped coil wall 18, 19, the radial dimensions are greater than the center distance of the axes of rotation 8, 9, so that each one Side arranged coil walls 18, 19 overlap each other. In the present In the exemplary embodiment, the coils 4, 5 have coil walls 18, 19 on both sides, the supply spool 4 with its spool walls 18, the spool walls 19 of the Take-up spool 5 in the range of radial (Fig. 4) or conical (Fig. 2) Friction surfaces 21 or ring friction surfaces overlap one another, the inside and / or can be arranged on the outside.

A drive connection 22 is located between the supply reel 4 and the take-up reel 5 arranged with an integrated slip clutch 23. The drive connection 22 is like this designed that they take into account the respective effective winding diameter (full or empty spool 4, 5) the take-up spool 5 is driven so quickly that the to be wound up carrier tape section 2b is always slightly tensioned. The prevents Slip clutch 23 that the carrier tape 2 tears. Above a certain one, in the Drive connection 22 effective drive torque consequently occurs Slip clutch 23 in operation, so that the take-up reel 5 is faster is driven, but only at a speed on the winding surface rotates according to the speed of movement of the carrier tape 2. The The drive and slip effect described above is due to the frictional rotation between at least one pair of coil walls 18, 19 ensures the one allow appropriate torque transmission. Depending on the winding size of the coils 4, 5 it is necessary that the drive connection 22 contains a translation to the Drive winding reel 5 faster. In the present embodiment this is achieved in that the diameter of the friction contact area Coil wall 18 on the supply spool 4 is dimensioned larger than the corresponding one Diameter on the coil wall 19 of the take-up reel 5. It is within the scope of. Invention possible, the friction between the coil walls 18, 19 by a axially compressive stress with which the coil walls 18, 19 to each other apply, the compressive stress due to the inherent elasticity of one or both Coil walls 18, 19 can be generated. The coils 4, 5 can with their Coil walls 18, 19 prefabricated with such undersize and / or oversize be that in the assembled position the coil walls 18, 19 with the desired side tension against each other.

Within the scope of the invention it is also possible to determine the friction effect by means of elevations and To create depressions in the form of teeth with associated tooth gaps (not shown), the coil walls 18, 19 not with an axial tension to each other but have to dodge axially elastically when pressing the teeth.

In order to turn back, for example caused by tensions in the carrier tape 2 to prevent the coils 4, 5, one of the two coils 4, 5 is a backstop 24 in the area of the corresponding journal and bearing bush parts 13 to 16 assigned. In the present exemplary embodiment, the backstop is 24 between the journal 14 and the bearing bush 16 of the take-up reel 5 arranged. The backstop 24 is elastic by means of a pawl drive compliant pawl 25 and a gear ring 26 cooperating with it formed, the pawl 25 on the journal or on the associated Bearing bush and the ring gear 26 on the other. Part can be arranged. In the present exemplary embodiment, the pawl 25 is on the bearing bush 16 and the ring gear 26 is arranged on the journal 14. As particularly shown in FIG. 3, is the ring gear 26 in the axial projection area of the z. B. hollow cylindrical Bearing pin 14 arranged. This is achieved in that the ring gear 26 in Area of an annular groove 27 is arranged, wherein the teeth within the annular groove 27 of whose bottom surface protrude so that the teeth do not protrude beyond the bearing surface and therefore do not interfere with the pivot bearing. The pawl 25 is at the free end a circumferentially extending latch arm 28 is arranged, which in the Area of a free space or a recess 29 is located in the bearing bush 16 and at its end facing away from the pawl 25 with the bearing bush 16 connected is. The free end of the pawl arm 28 is radial with the pawl 25 elastic bendable. The pawl 25 projects, for example, in the relaxed state Neutral position of the latch arm 28 or in its engaged position Inner lateral surface of the bearing bush 16, and it projects into the tooth gaps of the ring gear 26 in. The flanks of the teeth of the ring gear 26 and / or the flanks of the Pawl 25 have such a flank angle that when turning the Winding spool 5 in the winding direction of rotation above a desired one Tension in the carrier tape 2 of the pawl drive slips, the Pawl 25 is displaced from the ring gear 26, preferably with delivery successive clicks, and when turning in the opposite direction Pawl 25 performs its locking function. In the present embodiment have the teeth of the ring gear 26 and preferably also the pawl 25 in Cross-section of a sawtooth shape, the one pointing in the winding direction of rotation Flank of the pawl 25 is inclined and the other flank is steep. So that the pawl 25 and the associated pawl arm section 28 in this radial rebound Outer surface of the bearing bush 16 forming the winding surface by projecting through it not affect, the radial dimension a of the pawl 25 in question large that they in the position displaced from the ring gear 26 The outer circumferential surface of the bearing bush 16 does not protrude. The radial dimension of the Pawl 25 can e.g. B. the radial dimension of the bearing bush 16 approximately correspond. The spring movement can be achieved in that the thickness b of the Pawl arm 28 is dimensioned thinner than the immersion dimension of the pawl 25 the pawl 25 and is also thinner than the thickness c of the bearing bush 16, so that a free space 30 is available for the pawl 25 and for the pawl arm 28 into which they can move, here on the outside in the bearing bushing 16.

In the context of the invention, the pawl 25 can in a corresponding manner Bearing pin 14 and the ring gear 26 may be formed on the bearing bush 16, wherein there is a radially opposite function. The inhibiting or blocking function of the Backstop 24 is sufficient, an unintentional rotation of the associated spool to prevent.

It is advantageous to arrange the pawl 25 and the pawl arm 28 so that the Pawl 25 due to the inherent elasticity of the latch arm 28 against the teeth or the tooth gap base of the ring gear 26 is applied. With one Design generates the pawl 25 when it hits the tooth flanks or the Tooth base a so-called pawl sound (click sound) what is desired.

In the present exemplary embodiment, they are preferably diametrical to one another two latch locks are provided opposite. A pawl 25 can be offset in the circumferential direction so that a pawl faces a tooth, while the other is in a tooth gap.

The wedge-shaped application part 7 has the associated housing wall in a hole, being between the bottom and the top of the application part 7 and the Housing wall slots 31, 32 are arranged in the housing wall, through which the Carrier tape 2 extends. The housing 6 has a housing opening 33 through a cover 34 can optionally be opened and closed so that the coils 4, 5 are interchangeable. In the present exemplary embodiment, the bearing journals 13, 14 firmly connected to the housing 6. However, within the scope of the invention it is possible to firmly connect the journals 13, 14 to a component which is connected to the coils 4, 5 forms an interchangeable cassette, which in its functional position in the interior 35 of the Housing 6 is positioned by positioning elements, so that the not shown Cassette or the bearing pins 13, 14 are non-rotatably or fixed to the housing.

In the present exemplary embodiment, the housing 6 has the shape of a flat one Box, whose broad sides 36, 37 extend transversely to the axes of rotation 8, 9, so that the housing 6 is arranged upright in its normal functional position. The . Order part 7 is located in the lower front corner area of handheld device 1 or Housing 6. In the present embodiment, the cover 34 is wide arranged; so that the dividing line 38 between the cover 17 and the rest Housing part extends parallel to the wrap plane E of the carrier tape 2. The one Cover 17 opposite housing wall is designated 6a. The peripheral wall is designated 6b.

The individual parts of the handheld device 1 are made of plastic and are preferably Injection molded parts that can be produced quickly and inexpensively, even with difficult shapes to let. The pawl 25 and the pawl arm 28 on the one hand and the ring gear 26 on the other hand are in one piece on the associated bearing journal and the associated Bearing bush molded, so that the backstop 24 no additional parts results, but they are made in one piece with the supporting parts. Moreover is the backstop 24 with its parts in the material areas of the Bearing pin 14 of the bearing bush 16. The free interior 35 is therefore not reduced. The bearing pins 13, 14 are also in one piece on the broad side here Housing wall 6a or molded onto the aforementioned component of the cassette. As Connecting elements for the lid 34 can be on the inside z. B. be hollow cylindrical pin 39 formed in the hollow cylindrical bearing pin 13, 14 with a slight clamping effect.

Claims (14)

1. Hand-held appliance (1) for transferring a film of, for example, adhesive, covering or coloured material from a carrier tape (2) to a substrate, having

   a housing (6), in which a supply reel (4) and a take-up reel (5) for the carrier tape (2) are rotatably mounted by a rotary bearing (11, 12),

   which is formed by two bearing parts (13, 14, 15, 16) which are coaxially arranged and engage one in the other in sleeve form, and between which an annular or hollow-cylindrical bearing joint (10) is arranged, it being the case that, of the bearing parts (13, 14, 15, 16), one bearing part (14) is held in a rotationally fixed manner on the housing (6) and the other bearing part (16) is part of the associated reel carrier (5),

   a return stop (24), having a locking pawl (25) which is elastic and compliant against a spring force and cooperates with a toothed rim (26), being provided for one of the two reels (4, 5),

   characterised in that the return stop (24) is arranged between the bearing parts (13, 14, 15, 16) in such a manner as to pass through the hollow-cylindrical bearing joint (10),
   in that the locking pawl (25) is arranged on one bearing part (13) and the toothed rim (26) is arranged on the other bearing part (14), and
   in that the locking pawl (25) is radially movable or compliant against the spring force.
2. Hand-held appliance according to Claim 1,
   characterised in that the locking pawl (25) is arranged on the outer bearing part (16) and the toothed rim (26) is arranged on the inner bearing part (14), the outer bearing part (16) preferably being a reel carrier.
3. Hand-held appliance according to Claim 1 or 2,
   characterised in that the locking pawl (25) is arranged at one end of a pawl arm (28), which can bend radially with respect to the associated axis of rotation (9) and is connected at its other end to the associated bearing part (16).
4. Hand-held appliance according to Claim 2 or 3,
   characterised in that the locking pawl (25) and optionally also the pawl arm (28) are arranged on the inner wall of the reel carrier (15).
5. Hand-held appliance according to Claim 3 or 4,
   characterised in that the locking pawl (25) is arranged, together with the pawl arm (28), in a cutout (29) of the associated bearing part (16).
6. Hand-held appliance according to one of Claims 3 to 5,
   characterised in that the pawl arm (28) is arcuately bent around the associated axis of rotation (9).
7. Hand-held appliance according to one of the preceding claims,
   characterised in that the toothed rim (26) is arranged in a sunk manner in the associated bearing part (14) and the locking pawl (25) projects beyond the joint (10) between the bearing parts (14, 16).
8. Hand-held appliance according to Claim 7,
   characterised in that the toothed rim (26) is arranged in an annular groove (27).
9. Hand-held appliance according to one of the preceding claims,
   characterised in that a free space (30), into which the locking pawl (25) together with the pawl arm (28) can move, is provided on the side of the locking pawl (25) and pawl arm (28) facing away from the toothed rim (26).
10. Hand-held appliance according to one of the preceding claims,
    characterised in that two locking pawls (25) are arranged opposite one another.
11. Hand-held appliance according to Claim 10,
    characterised in that one locking pawl (25) is arranged offset in such a manner in the circumferential direction that when one locking pawl (25) is situated in a tooth gap of the toothed rim (26), the other locking pawl (25) is situated opposite a tooth of the toothed rim (26).
12. Hand-held appliance according to one of the preceding claims,
    characterised in that the locking pawl (25) and the pawl arm (28), as well as the toothed rim (26), are formed integrally on the respectively associated bearing part (14, 16).
13. Hand-held appliance according to one of the preceding claims,
    characterised in that the locking pawl (25) and/or the teeth of the toothed rim (26) have a sawtooth shape.
14. Hand-held appliance according to one of the preceding claims,
    characterised in that one of the bearing parts, in particular the radially inner bearing parts (13, 14), are formed integrally on the housing (6).

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