JPS59167452A - Adhesive tape pasting device to edge section of sheet molding part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for applying an adhesive tape to the edge of a sheet metal molded part in the longitudinal direction and in a U-shaped cross section. This apparatus simultaneously presses a tape guide means having a feed roller and a pre-folded tape onto both parts of a sheet metal part in which the tape is spring-biased relative to each other and the tape is guided into the tape-folding zone. an adhesive tape pre-folding means running between two application rollers adapted as such.

Bonding folds connecting metal parts with pressure- or thermosetting adhesives is widely used in the sheet processing industry. It is therefore customary, for example in the motor vehicle industry, to seal the creases of certain motor vehicle body parts, in particular doors, in this way and thereby to avoid the risk of corrosion.

In the automotive industry and similar industrial sectors, such bonded fold seam joints are used.
For the production of adhesives (int), adhesives in liquid or paste form are usually used, which adhesives are applied in the form of cords to the sheet metal parts to be connected. The method of applying the adhesive in this case is unsatisfactory in various respects. One drawback thereof is seen in the fact that the distribution of adhesive across the fold seams reached by this method is not sufficiently uniform (this fact would give rise to corrosion problems). As a disadvantage, the use of adhesives in liquid or paste form always gives rise to occupational health problems.

Additionally, in the can manufacturing industry for storing nutrients and similar materials, gluing or sealing the fold seams with an adhesive is known, for example, in United States Patent No. '5,125,000.
No. 56, French Patent Specification Publication No. 2,252,14
7 and Belgian Patent No. 444,014. The adhesive is used in these cases to connect the pleated edges of the can body parts to each other, either in liquid or paste form (by extrusion or the like), or in the form of a ribbon of adhesive tape. .

Trade name: Araldite (R) and Redux (R) Adhesive Foil (manufactured by Civer Geigy) (
Araldit (R) and Redux (R) Adh
Adhesives in the form of foils or, in particular, tapes, such as those known as esive foils (CIBA-GEIGY), are being increasingly used, since they offer significant advantages, especially in terms of occupational hygiene. However, heretofore, such adhesive foils or tapes have found very limited use or no use at all, for example in sealing or gluing fold seams in automobile body parts.

The main reason for this is that these adhesive films are made of highly cohesive (high viscosity) plastics, and their low tensile strength causes considerable difficulty in applying them by mechanical manipulation. Due to the fact that A further complication arises when such adhesive strips are applied to parts of a motor vehicle body with complex folded contours, especially three-dimensionally curved contours. These difficulties are particularly great when the pleated rim is to be provided with adhesive on both sides, ie when the adhesive tape is to cover the rim with a U-shaped cross section.

Previously known devices of the type mentioned at the outset are only suitable for processing relatively stiff adhesive tapes (not self-adhesive films) with considerable tensile strength. This is evident, for example, in the device described in U.S. Pat. No. 4,155,798, which has a prefold passage and a suppression roller.

The lack of adaptability of known devices for applying adhesive tapes of cohesive plastics with low specific stiffness and tensile strength to curved sheet edges is caused, inter alia, by the rigid arrangement of the pre-folding path and the pressing or applying rollers; Second, in recognition of the fact that the applicator rollers are free-rotating rollers (U.S. Pat. No. 4,155,798), the pair of applicator rollers as a unit of - an arrangement extending parallel to the axes of said rollers and at a constant distance in front of them with respect to the direction of tape advance and pivotable about a common axis approximately in the plane of symmetry of the prefold path; An arrangement has already been proposed in which the rollers are motor-driven via an elastically twistable shaft (European Patent No. 72,779).

Although this arrangement constitutes a very good improvement over the state of the art known to those skilled in the art, extensive tests carried out in practice have shown that its application suitability still remains to be decisively improved, especially in application at high speeds. It represents that.

OBJECTS AND SUMMARY OF THE INVENTION It is therefore an object of the invention to provide a device of the type mentioned at the outset, which allows substantially improved applicability even at high speed applicators, in particular a device of the type mentioned at the outset, which allows a substantially improved applicability, even in high-speed applicators. The object of the present invention is to provide a device in which the possibilities are improved and in which the adhesive tape pre-folding means can rely on this possibility of movement.

The purpose of this is to, according to the invention, enable the pair of applicator rollers and the adhesive tape pre-folding means to pivot about a common swivel axis extending parallel to the axis of the applicator rollers against the restoring bias of the spring. This is achieved by the device described at the outset, which is adapted.

A pair of applicator rollers may be adjustably mounted on said common swivel shaft and are preferably arranged behind the swivel shaft with respect to the direction of movement of the sheet molded part.

According to another feature of the invention, the pair of applicator rollers and the adhesive tape pre-folding means may be displaced together rearwardly and parallel to the common swivel axis against the bias of the compression spring.

The pair of application rollers and the adhesive tape pre-folding means may be mounted transversely to said common swivel axis in an adjustable adjustment carrier unit and are rotatable structural parts or parts rotatable about said common swivel axis. It may also be fixedly attached to the support unit. The adhesive tape pre-folding means may be adapted to displace the pair of applicator rollers parallel to the axes of the rollers against the bias of the displacement buffer spring. Further, the pair of pasting rollers and the preliminary bending means may be suspended together so as to be elastically pivotable about an inclined axis perpendicular to a plane defined by the axes of the pair of pasting rollers.

One of the two applicator rollers may be arranged so as to be freely pivotable about an axis extending parallel to the rotational axis of the roller, and may be supported so as to press biasedly against the other applicator roller. may have been done.

The two applicator rollers may each be driven by a separate drive motor with adjustable constant torque. An electric circuit may be provided for controlling the drive motor, by means of which the torque and no-load rotational speed of the motor or, respectively, of the applicator roller driven thereby can be adjusted.

The feed rollers are each driven by separate drive motors controlled by the same electrical circuit, between which the adhesive tape reaches the pre-folding means via a control roller, preferably one having the contour of a compex double cone. The control roller is moved forward and supported pivotably against the deflection of a spring restoring about an axis parallel to the axis of the control roller, while the deflection of the control roller is dependent on the traction force of the adhesive tape. Preferably, the control roller is coupled to an electrical measuring transducer which, in cooperation with an electrical circuit, controls the drive motor in such a way that the tensile stress of the adhesive tape remains constant at the feed roller.

The pair of applicator rollers and the pre-folding means may be carried on a trolley or on a sled and mounted on a support block which is elastically movable in the direction of a common swivel axis. The slats are laterally adjustable mounted on the guide plate, serve as carrier elements, and may be resiliently pivotable about a common swivel axis. The guide plate can be pivotably supported in several blanket parts which are mounted one after the other in an elastically tiltable manner in the housing.

Preferably, the support unit rotatable about the common swivel axis is displaceable against the bias of the compression spring rearwardly in the direction of the common swivel axis. This rotating structural unit may be a hollow body which is rotatable and pivotable and is mounted for axial displacement against the force of a compression spring, so that the common swivel axis is connected to the hollow body. Forms the central axis.

The adhesive tape pre-folding means may be a roller with concave or V-shaped axial sides.

The feed rollers may be supported in pairs by a swivel member adapted to propel each other elastically and at least one of the pair of rollers to pivot, the swivel member being adapted to pivot relative to the feed rollers. It may be opened to pass an adhesive carrier tape or a base carrier tape therebetween and may be secured in the closed feed active position by means of a spring-biased stop means, preferably a stop lever.

A tape guide path may be provided in front of the feed roller 2 in the direction of tape movement, this path having an external cross-section that protects the tape from twisting and that ensures that the tape is always exactly the same as the rollers of the feed roller row. The carrier tape may be curved apart in the longitudinal direction so that only the carrier tape side of the carrier tape contacts the carrier tape side.

One of the two applicator rollers is an output signal free rotation roller.

The drive motor described in the previous paragraph is connected to a second tacho alternator, and the control of the drive motor is effected by an electrical circuit which provides a control signal for the motor by comparison of the output signals of the two tacho generators. .

The invention will be explained in more detail below on the basis of two embodiments shown in the accompanying drawings.

(Embodiment) As shown in FIG. 1, the applicator head proper of the first embodiment includes a pair of suppression or applicator rollers 30a, 30b, drive means 1, 2, and 3, and feed rollers 40a to 40.
c, 51a to 51c, and 36a to 36c, pre-folding rollers 16 and 17, and guide passages 21 and 20, respectively, supplying the adhesive tape K supported on the carrier tape T, and supplying the adhesive tape K supported on the carrier tape T. K is adapted to guide the carrier tape T after it has been removed therefrom. The carrier tape T attached to the adhesive tape, hereinafter simply referred to as carrier cam-adhesive tape TK, is passed from the storage reel 52 (inside the cassette) through the synthetic resin plastic hose 6a with an oval cross section to the guide passage 2.
Run inside 1. The carrier tape T is further sucked up by the suction device 53 through the plastic hose 6b in front. The two hoses 6a and 6b are connected to the application head using plug couplings 7a, 8a and 7b, 8b, respectively. TK tape is fed by roller 4
The curvature of the guide passage 21 and the hose 6a drawn through 0a to 40c and 51a to 51c is
With respect to the pull of the tape, the TK tape is structurally designed to slide over its curved walls only on the non-adhesive carrier tape side. The curved wall is therefore substantially convex towards the carrier tape. T due to the oval cross section of the hose 6a
K-tape cannot be subjected to kinks within the hose.

The applicator head is attached to a moving device (not shown), such as a robot of known construction, and the robot includes a pair of applicator rollers 30a.

30b may be programmed to rest on the edge of the sheet metal part B and pass along both sides thereof, and in doing so apply the adhesive tape over the sheet edge with a V-shaped cross-section profile.

Preferably the storage reel 5a and the suction device 56 are stationary. And the same applies to the energy supply and the various rollers 30a, 30b, 4 of the applicator head.
Applies to control boxes 54 for drive means 1, 2 and 3, such as 0a to 40C, 51a to 51b, 56a to 36cfl.

Hoses 6a, 6b and electrical cables 4 and 5 for energy supply and control of drive means 1, 2 and 3
The length of is selectively adapted to prevailing conditions.

In each of FIGS. 1, 2 and 6, but also in FIGS. 7, 9 and 10, etc. serve to simplify the depiction of the movability of disparate parts of the device of the invention, etc. The axis system x-y-z is represented.

As can be clearly seen in FIGS. 2, 6 and 4, the applicator head moves through its casing part 57 to the moving device @(
(not shown), for example on the robot using a blanket part 25 or using a connection 7 flange 56. The cylinder 58 is supported by a bearing 42 in the casing part 57 so as to be rotatable about its axis and axially displaceable along the bearing. Pasting rollers 50a, 30b or their respective shafts 2
B and 67 are dovetail guides 58 a at the tip of the rotatable and displaceable cylinder 58 for radial displacement.
/53a or similar guiding means in a carrier unit 15 which is supported in turn, and may be fixed in position with mounting screws 26.

Furthermore, the wall member designated by 33 is the carrier unit 1
5, and the feed rollers 36a to 56
c, 40a to 40C5 and 51a to 51c and the reverse pressure roller 19 are supported in cooperation with the preliminary bending row 216 and the tape guide passages 20 and 21. The cylinder 58 is supported against the deflection of the spring 65. , it can be displaced backwards by a distance f (in the -Y direction) limited by the stop (FIG. 3). Its maximum twist angle and its “zero position”
is determined by the mechanism illustrated in FIG. This mechanism consists of a gear rack 44 and two reaction springs 69a whose spring and stress can be adjusted by means of installation screws 43a and 43b, respectively.
and 69b. Guide installation screws for rack 44 are indicated at 45. Two discs 62 are provided to limit the spring action. In the "zero" position, the axes of the applicator rollers 30a, 30b are approximately located within the Y-Z plane.

As shown in FIGS. 1, 4, and 6, the shaft 67 of the lower roller 30b of the pair of pasting rollers 50a, 30b is
It is supported in a bearing part 47 which is in turn supported so as to be displaceable in the Z direction in the carrier unit 15 and is biased in the +Z direction by a spring 68.

As a result, the lower roller 3ob is elastically propelled towards the upper roller 30a and thus towards the lower side of the sheet B.

The bias of the spring 68 may be adjusted by the set screw 48. Reference numeral 46 indicates an eccentric lever for opening the pair of applicator rollers 30a, 30b to the distance indicated by e in FIG. Rollers 30a and 30b are replaceably attached to the edges of shafts 28 and 67, respectively. The shaft 67 of the lower roller 30b freely rotates and is connected to the gear 22 of the tacho alternator 23 using a universal joint 31. The gear 22 is mounted on the wall member 33 using a sleeve screw 13 and a pin 14. Universal joint 31
, the ear screw 13 and the pin 14, variations in the spacing between the rollers 30a and 30b are made possible or compensated for.

The possibility of radial displacement of the carrier unit 15 supporting the pair of pasting rollers and the possibility of fixing it in the desired position make it possible to control the forward or leading movement or the following or trailing movement of the roller pair 30a150b. It is possible to follow the edges, and this run should be adjusted so that it is optimal under each normal application condition.

During operation, the applicator head moves in the +X direction as shown (FIGS. 1, 2, and 3). a carrier unit 15 and, together with it, a pair of pasting rollers 30a;
30b is located at position 15 shown by the dashed line in FIG. 3 in the -X direction.
When transposed through b and fixed in this position,
This then means accompanying travel. The amount of this additional travel in the -X direction is indicated by +d in the axis system of FIG.

Transposition in the opposite direction (+X) means a corresponding leading or forward run, the amount of which is indicated by the -d bracket in the axis system of FIG.

Thus, the pair of applicator rollers 30a, 30b can be adjusted firstly with respect to leading or trailing movement and secondly against the bias of the spring 65 in the -Y direction, i.e. in the direction of the roller axis. and thirdly, the pair of rollers is rotatable from a defined "null" position against springs 69a and 69b (although rotation here is limited by stroke 62) within the plane of symmetry of the rollers. The starting point may be parallel to the Y direction with respect to an axis extending in .

(c) Tape guide passages 20 and 21, a,! l) Roller 40
a to 40c, 51a to 51C and 36a to 36C1 Pre-folding rollers 16 and 17 and reverse pressure roller 18 are respectively mounted on a rotatable or displaceable casing part 15 or on a wall part 6 firmly fastened thereto.
3 is fastened or supported.

The feed rows 236a to 36c are supported by a swivel member 67 that is rotatable about the shaft 60.

Similarly, the feeding girders 251a to 51c are supported by a swivel member 68 that is rotatable about the shaft 59. Furthermore, at its distal end, the swivel member 37 has an extension slot).
The reverse pressure roller 18 for the first pre-folding roller 16 is conveyed, although it is transposable within 18a. Swivel member 3
The turning completion positions of 7 and 38 are shown by dashed lines in FIG. 6, and are designated by 37b and 38b.

In these positions, it is easy to insert the TK tape, guide the adhesive film K by the application roller pair 30a/1Gb-i, and guide the carrier tape T inside the passage 20. Spring-supported stop lever 6 that closes the swivel member
1, the feed roller is ready for operation, and the backpressure roller 18, by virtue of its conically shaped outer periphery, spreads the adhesive film K into the concave or V-shaped configuration of the first pre-folding roller 16. Propel into the hollow. The second preliminary folding roller 17 that is subsequently passed has a considerably smaller diameter and a smaller V angle than the first preliminary folding roller, and is arranged as close as possible to the pasting roller pair 30a/30b. o When passing over two pre-folding rollers, the adhesive tape is pre-folded at a gentle and continuously increasing angle in the direction towards the application roller, thereby causing a bend from the application point to the folding roller. Continuous bending is guaranteed. The two pre-folding rollers 16 and 17 are displaceable in the -Y direction against the deflection of the springs 63 and 64, respectively, so that they are able to improve the edge shaping even if the sheet edges are strongly curved. can accompany you. The constant (spring force) of spring 66 is spring 6
5 and the constant of spring 64 is much smaller than that of spring 6.
That one in 3 is smaller.

The preferred ratio of the constants of springs 65, 65.64 is about 1:0.
3:0.2.

The first pre-folding roller 16 is connected to the axis of the backpressure roller 18 (which axis is displaceable in the extension slot 18a) when the spring 63 is supported and the swivel member 37 is closed.

) and which is provided with a fork-shaped extension piece 19a that automatically guides this roller 18 so that its wedge-shaped outer circumference enters the V-shaped outer circumferential groove of the pre-folding roller 17. Supported.

The pre-folding rollers 16 and 17, which are elastically propelled towards the edge of the sheet metal, perform the task, inter alia, of pushing a folding area suitable for the adhesive tape K onto the edge of the sheet metal, such that no hollows are formed at the edge. , and the adhesive side inside the tape to prevent it from sticking together.

The driving force of all drive rollers is intensively supplied from the motor 2 through the gear 3, bevel gear 12, variable shaft 11, flat drive gear 29, and (fixed) shaft 28 to the upper roller 30a of the pair of pasting rollers 30a, 30b. be done. Furthermore, the umbrella drive gear 2
9, which is driven by ll' 1128, drives a stub shaft 29a to which a toothed belt pulley 29b is attached.

Boo IJ 29b connects the feed roller 40b to the toothed belt 9
and is driven via a toothed belt pulley 40e attached to the extension @40d of the roller 40b. Two further toothed belt pulleys 40f and 40g are attached to shaft 40d [pulley 40f which drives zero roller 40c which drives feed rollers 40a and 40c via a similarly devised toothed belt drive mechanism (not shown). The diameter of the roller 40c is designed so that its outer circumference is about 1.1 times that of the boot IJ 40g, so that the feed roller 40c runs at about 1.1 times the speed of the roller 40a.

At their lower or upper ends (ie outside their active length), rollers 40b, 51b and 36b are connected to each other by means of mutually supporting toothed rims. Similarly, rollers 40C151c and 36c are on one side, and roller 40a.

7 51a and 36a are connected to each other on the other side.

Therefore, rollers 40a, 40b, 40c.

When 66a, 36b and 36c rotate clockwise, rollers 51a, 51t) and 51c will rotate counterclockwise and the speed of rollers 40c, 51c and 36C will be about 10 times greater than the other rollers. .

This "lumped" roller is held together under stress by a compression spring 37aK, and the longitudinal profile of the roller is
Only 1c/36c are shaped to press together over their active length so as to exert a feed pressure on the TK tape or carrier tape T between them. The remaining rollers are axially profiled with end flanges, forming roller pairs 40c151c, 51a/36a.
A gap remains between 51 b and 36 b,
As a result, these roller pairs have no feeding function, but only a guiding function.

The roller pairs which influence the feeding of the tape 1 and thus the adhesive tape run exactly simultaneously with the application rollers 8 30a, 50b. Therefore, in practice, the removal of the carrier tape T, which does not exert any pull, such as the adhesive tape KIC between the embedding roller and the application roller, causes the tape moving roller pair 36C151c to run faster, thus eliminating any possible slippage of the carrier tape T. It also covers, so you are absolutely guaranteed safety. The risk of slipping actually only occurs when the carrier tape T has a relatively smooth surface. In contrast to a stationary pre-folding path, there is therefore no resistance to pulling in the adhesive tape K. However, it is important that the feed roller and the pre-folding roller all move automatically together with the pasting roller by the common swivel member 15 ◇ (Upper side) The driving speed of the roller 30a is free rotation (Lower side) To this end, two commercially available electric tacho alternators 1 and 1 are controlled by the reel-off speed of the roller 30b, which respectively measure the reel-off speed of the roller 30b or the speed of the drive motor 2 and convert this into an electrical control signal. 2
3, in which the control signal regulating the speed of the drive motor 2 is generated by comparison in a conventional electrical control unit 54. Control box 54 includes two potentiometers with adjustment knobs 72 and 73.

Potentiometer knob 72 allows adjustment of the mutual speed ratio of rollers 30a and 30b with a deviation of ±10% from a 1:1 ratio. The "natural speed" of roller 30a can be adjusted independently of the speed of roller 30b using potentiometer knob 73.
Even if the speed b is "zero", the speed of the roller 30a can be adjusted to a desired basic speed.

This may occur under various conditions, when for some reason a sheet with a particularly slippery surface is to be processed, and the roller 30b is rotated too slowly before application of the adhesive film begins. This is important when it continues to stop. This pasting control is performed by the moving device (
You can control the speed of all rollers (applying rollers and feed rollers) without connecting or exchanging information with the electrical control of the robot (robot).
It can be optimally adapted to the moving speed of the robot, including compensation for slippage of the lower pasting roller 50b.

Therefore, together with the possibility of movement (swivel, displacement) of the casing part 15.33 carrying the applicator roller, the feed roller and the pre-folding roller, the device of this embodiment of the invention makes it possible to move the adhesive tape K onto the sheet metal part B. Even if the robot operates at high speed and the thin plate has a complex shape, it satisfies all the conditions for uniform pasting without overlapping. Preferably, the pasting roller and feed roller are coated with silicone. The pre-folding rollers provided are made of polytetrafluoroethylene (eg Teflon). This prevents the adhesive tape from sticking to the rollers.

7-13, another particularly useful embodiment of the apparatus of the invention is illustrated.

1 FIG. 7 is a schematic perspective view showing the most important components of this embodiment. This element consists of a pair of pasting rollers 101, 10
2 and an octopus alternator 1 for each of these rollers.
Drive motors 103, 104 connected to 05, 106;
Pre-folding roller 107, two feed rollers 108 and 109, two back pressure rollers 110 and 111 and two guide rollers 112 and 113, and a drive motor 11 connected to an octopus alternator 115 for the feed roller.
4, and a control roller 116 mounted on the swivel movement reservoir for the supply of the TK tape and the adhesive film KJ: j)
Tape guide channels 117 and 118 serve, respectively, for the removal of the separated carrier tape T, and a suction device 1 for guiding the TK tape from the storage reel 121 into the supply channel 117 and the carrier tape T from the removal channel 118.
It consists of two plastic hoses 119 and 120 of synthetic resin, each serving for guiding to 22. moreover,
An electrical circuit 123 is provided for controlling the three drive motors 103, 104 and 114.

2 One of the main differences of this embodiment compared to the embodiments of FIGS. 1 to 6 is that a separate drive motor 103, 104 or 114 is provided on one side for each of the applicator rollers 101 and 102; And for tape feeding (roller 10
8 and 109) on the other side: two motors 106 and 104, and a pasting roller 10
1 and 102, and is fed back by tacho alternators 105 and 106,
The applicator rollers 101 and 102 are controlled by an electric circuit 123 in such a way that they are driven with a constant torque on one side and have a constant no-load rotation speed on the other side.

This torque and no-load rotation speed are determined by the electric circuit 123 (sixth
Adjustment selection or preselection can be done with the help of two corresponding fftll m elements 123a and 123b of FIG.

Control roller 1 feeds TK tape or adhesive tape.
The zero control roller 116 controlled via the guide roller 116 is attached to a guide arm 124 which may be pivotable about the axis of the guide roller 113 and is biased by a tension spring 125, so that the adhesive tape A slight tension is always applied to K. The magnitude of the base tension may be adjusted using knurled screws 126 (FIG. 3).

The guide arm 124 is connected to a potentiometer 127, by means of which a pivoting of the control roller 116 causes a corresponding displacement of the potentiometer 127. A zero potential difference note 127 is connected to the electric circuit 123 and together with the circuit,
The drive motor 114 of the tape feeder is driven so that the pull on the adhesive film K always moves the individual rollers (explained below).
so that it is independently constant? lj control. As in the first embodiment, the circumferential speed of the feed roller 109 which draws out the carrier tape T is slightly greater than that of the feed roller 108 in order to compensate for any slippage that may occur. Preferably, the control roller 116 has a compex double-cone profile, so that constant distortion of the adhesive film ribbon is achieved on one side and peel centering on the other side.

Also shown in FIG. 16 is a cutting tool 128, which is controlled by an electrical circuit 123 via a drive magnet 129 and serves to cut away the adhesive film at the tip of each sheet edge. Finally, the electric circuit 123 is a control device (robot)
In conjunction with a limit switch (not shown), any one of the possible movements of the various parts of the tape applicator (as further described below) can be controlled by a certain limit switch provided by the limit switch. It is designed to stop unexpectedly whenever the limit is exceeded.

This makes it possible to avoid damage to the applicator and the lamella, and possibly also to the unruly robot.

The detailed structure of this embodiment is illustrated in FIGS. 8-12. All parts of the applicator head proper are attached to a blanket part 140 which is supported for resilient pivoting movement about an axis extending parallel to the X-axis in a casing 141 with an open tip. Illustrated by swivel bearing 142. The casing 141 itself is connected to the 5 control device (robot) as in the case of the first embodiment.
A zero tension spring 145, which is fastened using a flange 144, is placed between the casing 141 and the blanket part 140 and causes the entire applicator head to be directed upwards (+Z) with a slight deflection. and causes the lower applicator roller 102 to press continuously against the sheet with a constant force, thereby accurately following the vertical movement of the sheet edge (deviation angle, FIG. 10).

The magnitude of the offset may be adjusted using installation screws 146. A stator 150 is attached to the blanket component 140, and a cylindrical shaft 153 is supported on the stator 150 using ball bearings 151 and 152 and is elastic about the Y axis. At the rear end of the stator, which may be freely pivotable, the shaft 15
3, the tip is a blanket part 14 for rotating the joint.
It is rigidly connected to an interlocking front plate 154 by two spring struts 155 and 156 that are tightened together (FIG. 11). Spring struts 155 and 156 each have a restoring cylinder spring 158 that is adjustable by a set screw 157.
(0 where the axes of the two application rollers 101 and 102 are perpendicular to the YZ plane) which controls and limits the pivoting movement of the shaft 153 (swivel angle α, FIG. 11). In order to rotate therewith, a guide plate 160 is mounted, on which a sled 161 is fixed, and the sled 161 is fixed by means of guides or the like. It can be adjusted to 16
1 is an O-sled 16 that transports all other parts of the pasting head.
The ability to displace the carrier block 162 in the The carrier block 162 is supported movably in a direction parallel to the axis of the shaft 153 (in the Y direction) by a guide rod 163 running in a ball box 164 of a zero sled 161 and is elastically supported by means of a spring 165. (Figure 10).

The Y-movement of the carrier block 162 is controlled by a support roller 166 (FIG. 9) rotatably supported at its tip and a rotating shaft extending parallel to the Z-axis. stand still towards the edge of
and follows its edges elastically.

The shaft 17 of the lower pasting roller 102 is attached to the support block 162.
The 0 belt pulley 172 on which 1 is supported is attached to the free end of 171. The 0 belt 173 connects the applicator roller 102 to its associated drive motor 104 via a belt pulley 174 mounted on the motor shaft. (FIG. 7) 1i11175 of the upper application roller 101 still supports the belt pulley 176 at its other end, but the swivel arm 180, which is rotatably attached to the swivel arm 180, extends parallel to the Y axis. It is attached to the carrier block 162 so as to be pivotable about an axis 181. Coil spring 179 is connected to swivel arm 18
0 and with it the applicator roller 101 elastically downwards to the lower applicator roller 102, while the spring stress is adjusted by the set screw 183. (Figure 8)
o Therefore, the upper applicator roller 101 can perform vertical movement (angle β) independently of the lower roller 102. The lower stop point of the pivoting movement can be adjusted using the set screw 184i.

The drive motor 103 that drives the upper pasting roller 101 is
The motor shaft 181 is connected to the d-roller 101 via another belt pulley 177 and the drive belt 17B (FIG. 7), and the motor shaft 181 is connected to the bearing 182 of the swivel arm 180.
the application head in such a manner as to be in exact alignment with the application head. Therefore, the pivoting movement of the applicator roller 101 has no effect on the drive connection of the roller 101 with the motor 106.

The preliminary folding roller 107 is rotatably fixed to a blanket bearing 186 on the front end side of the carrier block 162. Blanket bearings 186 are in turn mounted on carrier block 162 so as to be displaceable in the Y direction and supported by support springs 187. Therefore, the preliminary folding roller 107 is
An elastic compensation movement perpendicular to the sheet metal edge and in the plane of the sheet metal can be carried out independently in order to follow the sheet metal edge even through its strongly curved sections. The stress (spring constant) of the spring 187 is much smaller than that of the spring 165 of the sled 161.

Further, the carrier block 162 includes a guide roller 11
3 and the control roller 116 and a potentiometer 127 (seeing plate) is attached to it. Conveyance blanket 168 connected to bottom 161 with 7 lunges
Two feed rollers 108 and 10 installed in
9 is a drive motor 114 (FIG. 7) and a drive belt 19
2 and belt boot IJ 193 attached to the motor shaft
It is connected to belt pulleys 190 and 191 (FIG. 10), which are coupled via a shaft (FIG. 9), using a shaft (not shown). Also, two tape guide passages 117 and 118 are attached to the conveying blanket 1680. Two back pressure rollers 110 and 111 are arranged so as to be able to rotate about the guide roller 112, and the TK tape is introduced. or carrier tape T
In the zero operating position, which can be held in the open position by a latch 195 to allow removal of the
08 and 109, the stress of spring 197
8 each propelled while can be adjusted by 8.

In the second embodiment described above, the applicator roller pair 101/102 together with the pre-folding roller 107 thus exhibits four possibilities of elastically supported movement. They control the vertical rocking movement of the entire head about the axis of the swivel bearing 142, the rotation about the axis of the cylindrical shaft 153, the horizontal movement in the This is a blow in the Y direction. Furthermore, the upper applicator roller 101 can be moved vertically in accordance with the lower roller 102, and the pre-folding roller 107 can be moved in the Y direction in accordance with the applicator roller. All these possibilities of movement make it possible to apply the adhesive film K to the thin plate B evenly and without twisting, even at high speeds and with complex edge geometries. The electrically controlled drive of the two applicator rollers 101 and 102 and of the tape transport means 9 via separate drive motors allows all roller speeds to be controlled at all speeds without any connection or exchange of information with the control electronics of the steering device (robot). Three possibilities of spring-supported movement (swaying, rolling and striking) can be optimally adapted to the robot's movement speed, including slip compensation, under which conditions the two application rollers can be applied to the edge of the thin plate. However, it guarantees optimal tracking.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a device according to a first embodiment of the present invention, FIG. 2 is a front view showing an application head blower in the embodiment shown in FIG. 1, and FIG. A longitudinal section through the first embodiment shown in FIGS. 1 and 2 with respect to the horizontal plane designated In-III; FIG. ll
5 is a partial vertical sectional view of the first embodiment on a plane extending perpendicular to the l-1l1 plane; FIG. 5 is a partial sectional view of the first embodiment on the plane indicated by v-■ in FIG. 3; FIG. 6 is an enlarged cross-sectional view of another part of the first embodiment on the plane indicated by Vl-Vl in FIG. 4, and FIG. FIG. 8 is a front view showing a part of the application head of the second embodiment from the direction indicated by the arrow ■ in FIG. 9; FIG. The second embodiment shown in FIG.
10 is a plan view partially including a cross section of the plane indicated by X-■, and FIG.
11 is a front view showing details of the second embodiment; 3 FIG. 12 is a partial sectional view showing other details of the second embodiment; and FIG. 13 is an electric circuit block. A diagram is shown. In the figure, 50a, 30b... pasting rollers 40a to 40c, 51a to 51c, 36a to 36c... feed rollers 16 and 17... preliminary folding rollers 101 and 102... pasting roller 107... spare Bending rollers 108 and 109... Feed roller K... Adhesive tape B... Thin plate patent applicant Civer Geigy Akchen Gesell Shaft 4

Claims (9)

[Claims] (1) A tape guide means having a feed roller, and an adhesive tape pre-folding means that runs between a pair of application rollers adapted so that the pre-folded tape is spring-biased with respect to each other; The roller and the adhesive tape pre-folding means are rotated on a common swivel shaft extending parallel to the axis of the application roller, against the bias of the spring to return to its original position.
An adhesive tape applicator for applying an adhesive tape in the longitudinal direction and in a U-shaped cross section to the edge of a thin plate molded part, characterized in that it is adapted to be pivotable. (2) The apparatus of claim 1, wherein the pair of applicator rollers are adjustably attached to the common swivel shaft. (3) The device according to claim 2, wherein the pair of pasting rollers are arranged behind the swivel shaft with respect to the direction of movement of the thin plate molded part. (4) The pair of application rollers and the adhesive tape pre-folding means are adapted to be displaced together rearwardly and parallel to the common swivel axis against the bias of a compression spring. The apparatus according to any one of the ranges 1 to 3. (5) The pair of application rollers and the adhesive tape pre-folding means are displaceably disposed across the common swivel shaft and are fixedly attached to a rotation support unit rotatable around the common swivel shaft. 5. The device according to claim 2, wherein the device is mounted in an adjustment carrier unit which is installed in the adjustment carrier unit. (6) The adhesive tape pre-folding means is adapted to displace with respect to the application roller and parallel to the axis of the roller against the bias of a displacement buffer spring. equipment. (7) The pair of pasting rollers and the preliminary bending means are suspended together so as to be elastically rotatable around an inclined axis perpendicular to a plane determined by the axes of the pair of pasting rollers. Apparatus according to any one of claims 1 to 6, adapted to do so. (8) One of the pair of pasting rollers is arranged so as to be rotatable around an axis extending parallel to the rotational axis of the roller, and pressed biasedly against the other pasting roller. Apparatus according to any one of claims 1 to 7, as supported by . 9. The apparatus of claim 1, wherein each of the pair of applicator rollers is driven by a separate drive motor with an adjustable constant torque. α0 includes an electric circuit for controlling the drive motor,
10. Device according to claim 9, in which the torque and the no-load rotational speed of the motor or, respectively, of the applicator roller driven thereby can be adjusted by means of the circuit. alpha force Claim 1, in which the feed rollers are driven by separate drive motors controlled by one and the same electrical circuit, while the adhesive tape is fed via a control roller before reaching the pre-folding means. The device according to any one of items 8 to 10. (b) The control roller is supported pivotably against the bias of a spring restoring to the rotation of an axis parallel to the axis of the control roller, while the deflection of the control roller is dependent on the traction force of the adhesive tape. An apparatus according to claim 11. (to) The control roller is coupled to an electric measuring transducer which, in cooperation with the electric circuit, controls the drive motor such that the tensile stress of the adhesive tape remains constant at the feed roller. Range No. 11 gives priority to the device described in No. 12. α force The pair of application rollers and the pre-folding means are attached to a support block that is carried by a truck or a sled and is elastically movable in the direction of a common swivel axis. The device according to any one of items 1 to 10. (c) The slat is laterally adjustable mounted on a guide plate, serves as a carrier element, and is resiliently pivotable about the common swivel axis. Device. 16. Apparatus according to claim 15, wherein the guide plate is pivotably supported in blanket parts which are successively mounted in a resiliently tiltable manner in the casing. α force Claim 5, wherein the support unit is rotatable about the common swivel shaft and displaceable rearwardly in the direction of the common swivel shaft against the bias of the compression spring. equipment. (G) The rotary support unit is a hollow body that is rotatable and pivotable and is mounted so as to be displaced against the force of the compression spring, so that the common swivel shaft is connected to the hollow body. 18. The device according to claim 17, which forms a central axis of the device. θ value The device according to any one of claims 1 to 18, wherein the adhesive tape pre-folding means is a roller with a concave cross section. 19. The apparatus according to claim 1, wherein the adhesive tape pre-folding means is a roller having a V-shaped cross section. (c) the feed rollers are paired in pairs and elastically propel each other, and at least one of the pair of rollers is supported by a swivel member adapted to rotate;
the swivel member is opened to pass the adhesive cam carrier tape or pace carrier tape between the feed rollers;
7. A device according to claim 1, wherein the device is closed in the active feed position by means of a spring-biased stop lever. (b) A tape guide path is provided in front of the feed roller in the direction of tape movement, the path has a cross section of a shape that protects the tape from twisting; 22. The device according to claim 1, wherein the device is curved at a distance in the longitudinal direction so that only exactly the same carrier tape side always contacts the rollers of the feed roller array. (b) One of the two applicator rollers has a first
10. The device of claim 9, which is a free-rotating roller connected to an electric tacho generator. (c) The drive motor described in the preceding paragraph is connected to a second tacho generator, and the control of the drive motor is controlled by the first and second tacho generators.
24. The apparatus of claim 23, wherein the apparatus is implemented by an electrical circuit which provides a control signal for the motor by comparison of the output signals of the tacho generators of the motors.