DE2043674B2 - Device for connecting butt butted plastic strips by means of a U-shaped folded adhesive strip - Google Patents

Description

From the DT-OS 14 79 577 is a device to connect the butt abutting plastic straps ready by means of a U-shaped folded adhesive strip; known The well-known device shows you along the way stretching base with a countertop and isi with a flush alignment of the plastic construction equipped in the transverse direction of the base ensuring a device. It also has a cutting front direction for trimming the joint to match, and finally there is one more device for pressing the adhesive strip on both sides over the joints.

The known device is used for thermoplastic melting of the plastic strips with use hung a U-shaped folded adhesive tape, which is located inside the device on a supply roll det lind to establish the connection between the art, strips of fabric are pulled off each time. There; Pulling off is done by means of a button in front of hand to be displaced band clamp, which is a piece the tape pulls when moving the button over a stretched carrier, on which the pulled off at the end of the tape. As soon as the ver slidable tape clamp is close to your front When the end position is reached, an automatic cutting device is used device triggered, which separates the pulled tape de from the supply roll.

The known device also has two pliers, each consisting of two arms, which around a ge memsame axis can be pivoted. The plastic films to be connected to each other are clamped one after the other between the arms each with a pair of pliers, whereupon pivoting by hand by means of a With a knife, each individual plastic strip is cut flat at the intended joint.

The known device also has a heating plate as soon as the displaceable tape clamp is in its own pushed out end position and cut off the pulled tape end from the supply roll has been. the tape carrier is pivoted with the sticky tape end attached to it so that a piece of the cut tape comes to lie on the heating plate. During this pivoting of the tape carrier this bends around a specially provided axis so that the cut adhesive tape is folded up roughly in the middle of its length. There; Adhesive tape now has two legs, from wel one rests on the heating plate, while the other is directed upwards. Now dit two pliers, in which the plastic strips to be connected are set around the common axis swiveled so that the joint of the plastic straps to lie on the adhesive tape lying on the heating plate gene is coming. The training is designed in such a way that

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The one pliers arm takes the upwardly directed leg of the carrier with it, whereby the leg of the adhesive tape end, which was previously directed upwards, is placed at the joint on the plastic tapes to be connected. The cut adhesive tape therefore takes the form of a U-shape folded strip, the two legs of which rest on both sides in the area of the joint on the plastic strips to be connected. Now a pressure plate is brought by hand onto the plastic _J0 strips at the connection point by means of a pressure arm, whereupon the operator actuates a pressure lever to apply pressure and the heating plate As a result, a thermoplastic welding takes place at the connection point. Then the pressure lever is released, the heating plate is switched off and the firmly bonded plastic tapes are removed from the carrier he separate cutting _{device, zo} which is attached to the device, separated.

In order to establish the connection between the plastic strips to be cleaned, the known Device for performing a relatively large number of manipulations. To help here and at the same time to move on to the connection of the plastic tapes by means of an adhesive strip with self-adhesive To form is the aim of the invention, which is accordingly based on the object of creating a device that largely automatically the connection of abutting plastic strips by means of a U-shaped folded adhesive strip with self-adhesive allows.

To solve the problem of the invention, a device for connecting butt-abutting one is assumed Plastic tapes by means of a U-shaped folded adhesive strip with a longitudinally extending one Base with a worktop, with a flush alignment of the plastic strips in the transverse direction of the base ensuring device and a cutting device for matching Trimming of the joint and a device for pressing the adhesive strip on both sides over the Joints. In such a device, the invention consists in that in a recess in the worktop As a support for the abutting plastic strips, a slide with a knife can be moved lengthways is arranged, being on the ski. Men as transmitters of the adhesive strip a flap is movable, and that when the slide is displaced from the starting position a pressing and folding device for the adhesive strip below the joint of the plastic strips can be passed by.

Advantageously, the training is made so that the slide under the action of him in the rear Rest position compelling spring is, can be brought into a front position and into an intermediate position and in these positions can be fixed by means of an unlockable locking piece and two stops, the Slide in the front position the knife and in the intermediate position a support plate for the plastic tape joint turns to.

In a preferred embodiment of the invention, a cover is hinged to the base. Here recommends it is, on the lid with the locking piece cooperating unlocking elements and one in his Closing position to attach the slide holding the locking nose in the front position, this being done by the unlocking elements Unlatched locking piece in the way of the

Stop for the intermediate position of the slide itself is located.

When the plastic bands to be joined together are placed on the worktop that they overlap each other a little at the later joint, then press a button on the cover when it is closed provided pressure piece iüe plastic bands against the knife, so that these bands fit together exactly be severed. As a result, they come to rest against each other when the lid is opened.

When the lid is closed, the unlocking elements have the locking piece out of its the slide in the front position holding detent position pressed As long as the cover is closed, the slide continues to be held in its front end position by the locking lug on the cover. Therefore, the sled only when opening the lid of the attacking one Spring can be pulled into the intermediate position.

It is also advantageous if on the flap with the locking piece in the intermediate position of the carriage, the unlocking members are attached. This makes it possible that when the adhesive element is applied to the plastic strips, the carriage is in the intermediate position is released from its blocking and therefore from the spring acting on it into its rear rest position is adjusted.

The pressing and folding device for the adhesive strip advantageously comprises one in the carriage rotatably mounted roller, the surface of which protrudes slightly beyond the worktop and soft when adjusted of the slide in the rear rest position folds the free half of the adhesive strip and against the plastic straps presses.

It is also favorable if at the front end of the base upwardly protruding pegs with mutual Removal are attached so that hairpin-shaped folded backing paper strips with the vertices lie against each other and wear a bridging adhesive tape and with recesses are provided, can be slipped onto the pin with these recesses.

It is also advisable if there are protruding pipe ends on the cover into which the free The ends of the pins protrude when the lid is closed. Finally, it is still an advantage if the free ends of the pins are tapered.

The invention is explained below with reference to the drawing, which illustrates an embodiment. It shows

F i g. 1 the junction of two adhesive strips that are connected to one another by a U-shaped folded adhesive strip Plastic straps with perforation, graphically,

F i g. Figure 2 is a cross section taken along line 11-11 in Figure 2 Fig.l,

F i g. 3 shows an embodiment of the device according to the invention, diagrammatically,

F i g. 4 a section along the line IV-IV in Fig. 3,

F i g. 5 has the same section as FIG. 4, but the slide is blocked in its intermediate position,

F i g. 6 shows the same section as in FIG. 4, but the slide is moved to the rear rest position,

F i g. 7 a strip-shaped label made of two hairpin-shaped folded backing paper strips and an adhesive strip with self-adhesive, in front view and Top view,

F i g. 8 a section showing the knife arrangement in the slide,

F i g. 9 a cross-section through the slide,

F i g. 10 is an illustration for explaining the folding over of the adhesive strip.

The device according to FIG. 3 to 6 is used to connect two strips 1, 2 (Fig. 1) made of plastic, for example made of PVC or polyester, for example two perforated tapes or films, by means of an adhesive strip 3 from clear film and with self-adhesive to produce automatically so that the adhesive strip is U-shaped is folded and the ends of the strips 1, 2 butt against one another between the legs 4, 5 records.

The adhesive strip 3 is located on the carrier paper strip 7 before it fulfills its connecting function and 8, which are folded in a hairpin shape. The adhesive strip 3 bridges the two carrier paper strips 7, 8 and adheres with the adhesive side to the legs 9, 10.

In the apex area R , both the carrier paper strips 7, 8 and the adhesive strip 3 have perforations 11. Furthermore, 7,8 recesses 12,13 are provided in the carrier paper strips. The recess 12 is designed as an elongated hole arranged symmetrically to the center line M and extending transversely to this, whereas the recess 13 is configured as a round hole arranged on one side of the center line M.

To establish the connection according to FIG. 1 and 2, the adhesive strip 3 must be detached from the label 6. It must also be ensured that the ends of the strips 1, 2 abut one another at right angles to their longitudinal extension in such a way that the continuation of the switching holes 14, 15 at the transition from a plastic band on the other hand plastic tape is retained. The connection of the plastic strips 1, 2 producing Device 16 has a box-shaped base

17 with floor that can be set up on a horizontal surface

18 and parallel to this extending worktop 19, which merges into a plane surface 20 in the rear area of the base. In the base 17, a slide 21 is inserted, which can be adjusted in the direction and the opposite direction of the arrow P (FIG. 4). For this purpose, strips 22 and 23 (FIG. 9) are attached to the side of the slide 21 and are guided so that they can slide in grooves 24 of the base. The slide 21 is under the action of a tension spring 24 '(FIG. 4), which tries to move it in the opposite direction of the arrow P into the rear rest position, in which it moves the position shown in FIG. 6 assumes the position shown at the front end of the slide 21, the handle 25 is attached, by means of which the slide 21 from its in F i g. 6 into the rear rest position shown in FIG. 3 reproduced front position can be brought. The carriage 21 has a knife 26 on its end facing the plane surface 20, which extends parallel to the displacement device Psich and is arranged on the halving center line L of the carriage 21. The cutting edge 26 'of the knife protrudes beyond the surface of the worktop 19 Piece Γ (Fi g. 8), which is slightly longer than twice the thickness of the plastic strips 1, Z

When the carriage 21 in its front, in F i g. 3 and 4 has been pulled, then it engages different locking piece 27, which is under the action the spring 28 pushing it upwards, enters the recess 29 serving as a stop and holds it the carriage 21 in the in F i g. 3 and 4 position shown. On the bar-shaped locking piece 27, two pins 30 are attached, which are guided in the holes 31 and 32 of the worktop 19 in a displaceable manner are.

At the rear end of the device, the cover 33 is pivotably mounted at 34, 35 via a hinge. The protruding round pins 36, 37, which serve as unlocking elements, are attached to the cover. go into holes 31 when closing the lid

ίο and 32 insert themselves and thereby move the pins 30 with the locking piece 27 attached to it in the direction of the arrow V so that the locking piece is pushed out of the recess 29. As long as the cover 33 is closed, the carriage 21 can still not move in the opposite direction of the arrow P because a locking lug 38 is attached to the cover 33, which is located behind the upper end 25 'of the handle 25, as shown in FIG G. 4 is shown in dashed lines. Only when the cover 33 is lifted and its locking lug 38 releases the upper handle end 25 'can the slide 21, which is initially still free from the locking effect of the locking piece 27 because the pins 36, 37, the pins 30 still sufficiently far in the direction of arrow V, move in the opposite direction of arrow P. The stop edge 39 on the slide 21 reaches the right-hand edge of the locking piece 27, so that the slide in its position shown in FIG. 5 is held intermediate position shown. The carriage 2t cannot move any further in the opposite direction of the arrow P because the pins 36 and 37 do not push the locking piece 27 so far in the direction of the arrow V. that the lower edge 40 would be below the upper edge 41 of the locking piece 27.

On the worktop 19 upwardly protruding dowel pins 42, 43 are attached so that they are when placed the plastic strips 1, 2 on the worktop 19 immediately adjacent to the plane surface 20 exactly Insert them appropriately into the corresponding switching holes 14, 15 of the plastic straps 1, 2. When the carriage 21 its in Fig. 3 and 4 assumes the front position shown, then there is the knife 26 with the Cutting blade 26 'below the ends of the plastic strips 1, 2. These are when the lid is closed 33 of the pressure piece 44 attached to it

pressed firmly onto the cutting blade 26 'so that the ends of the plastic strips 1 and 2 are cut in a straight line here and when the lid is opened the cut surfaces butt against each other.

On the base 17 there is also a U-shaped design

Flap 45 (FIG. 5) with legs 46 and 47 at 48 and 49 is mounted such that it can pivot. A handle 50 serves to operate them. The web 51 of the U-shaped Flap 45 is formed by a U-profile with a covered open side, in which a resiliently flexible

biger material 52 is embedded, on which a metal bridge 53 rests with upwardly protruding teeth 54 The teeth slide through openings in the upper wall 55 of the web 51 and corresponding Openings in a plate 56 made of elastically resilient

bend material. The mutual distance between the teeth 54 corresponds to the mutual spacing of the perforation 11 <F i g. 7) and the switching holes 14,15 (Fig. 1) in the plastic volumes 1,2 match.

In addition, the teeth 54 are designed so that they

can fit exactly in the perforation 11.

The upwardly protruding pins 57.58 are also attached in the base 17 (FIG. 3). The pin 57 has

elongated round cross-section, whereas the pin 58 is circular. Their mutual distance 5 (FIG. 4) corresponds to the distance S (FIG. 7) of the recess 12, 13 in the label 6. With their free ends, the pins 57, 58 protrude above the worktop 19. The pin 57 is arranged symmetrically to the longitudinal center line of the device 16 or the slide 21, whereas the pin 58 is laterally offset to this longitudinal center line. when a label 6 for releasing the adhesive strip 3 is placed in the device 16. For this purpose, a label is placed in a position that is opposite to that according to FIG. 7 is rotated by 180 °, slipped by hand onto the conical ends 57 'and 58' of the pins 57 and 58. The teeth 54 penetrate the perforation 11 , 60 placed over the pins 57, 58 so that their free ends protrude into the interior of the pipe ends. With their free end walls, the applied label 6 with the openings 12, 13 is pressed deeper onto the pegs 57, 58, so that the carrier paper strips 7, 8 are held firmly on the pegs. If, after opening the cover 33, the flap 45 is pivoted around the bearing points 48, 49 by grasping the handle 50 in the direction of the arrow Z (FIG. 4), the adhesive strip 3, which is firmly attached with its non-adhesive side the plate 56 is placed, taken along and pulled from the carrier paper strips 7, 8, as shown in FIG. 5 is played.

The distance E of the teeth 54 from the bearing points 48, 49 (FIG. 5) corresponds to the distance E of the dowel pins 42, 43 from the bearing points 48, 49. As a result, when the flap 45 is folded over, the adhesive strip 3 comes into its position in FIG. 6 to lie with the adhesive side on the previously trimmed ends of the plastic strips 1, 2. The outer edge 61 (FIG. 5) of the adhesive strip cuts off with the outer edge 62 (FIG. 3) of the plastic strips 1, 2 to match. Since the carriage 21 after the cutting of the plastic straps 1, 2 is the one shown in FIG. 5 assumes, at the joint of the ends of the plastic straps 1, 2 is the plate 63 provided on the slide with its surface 64 under the plastic straps 1, Z. The surface 64 of the plate 63 lies in the same plane as the surface of the worktop 19 .

If, after applying the adhesive strip 3 to the plastic strips 1, 2 by means of the flap 45 with the handle 50 in the direction of the arrow Y, slight pressure is exerted, then the teeth 54 are pushed back in the opposite direction of the arrow Y , the metal bridge 53 being the spring material 52 compresses. In addition, in FIG. 5 to the right of the center line W lying piece of the plate 56 firmly pressed onto the portion of the adhesive strip 3 lying on the plastic tapes 1, 2 As a result, this adhesive element portion, which is designated in Fig. 10 by 3a , adheres to the tapes 1, 2.

When the plate 56 is pressed lightly in the direction of the arrow Y , the free half 3b of the adhesive strip protruding over the plastic strips 1, 2 in the direction of the pins 57, 58 is pressed down slightly by the elastic plate 56 (FIG. 10), so that it rests somewhat with the adhesive side on the surface 64 of the plate 63 and sticks to this slightly

Symmetrically to the longitudinal center line L , an upwardly projecting pin 65 is provided on the leg 46 and a pin 66 is provided on the leg 47. The distance 1 of the pins 65, 66 from the hinge points 48, 49 corresponds to their distance e from the holes 31, 32. When the flap 45 from its in F i g. 3, 4 is pivoted in the direction of arrow Z, so that the adhesive strip 3 (FIG. 5) is transferred to the plastic strips 1, 2 (Fi g. 10), then the pins 65, 66 penetrate the holes 31, 32 a. They are so long that they remove the locking piece 27 from the in F i g. 5 press the assumed position down under the lower edge 40 so that the slide 21 is unlocked. As a result, it is moved by the spring 24 into the position shown in FIG. 6 reproduced rear rest position shifted. During this displacement, the free half 36 of the adhesive strip 3 is initially taken along by the plate 63 (FIG. 10), being bent over around the rear edge 67 of the tape. When the slide is moved further in the direction of arrow D , the plate 63 detaches from the free half 3b, and the roller 68 rotatably mounted in the slide, the outer jacket 68 'of which slightly protrudes beyond the surface of the worktop 19, passes under the adhesive strip half 3b on the non-adhesive half Side, it bends completely around the edge 67 and presses it upwards against the plastic strips 1, 2. Since the plate 56 presses firmly against the top of the plastic strips 1, 2, the adhesive strip half 36 with the adhesive side is firmly against the plastic strips 1 , 2 pressed so that the fixed connection according to F i g. 1 and 2 is made

To automatically establish the connection according to FIG. 1 and 2 all that is required is to insert the plastic strips 1, 2 according to FIG. 3 and the plugging of the label 6 onto the pins 57, 58 as well as the closing of the cover 33 and the subsequent opening of the same and the advancement of the carriage 21 ir the in F i g. 3 and 4 shown front position and de; Pivoting the flap 45 from the in F i g. 3 and ' into the position shown in FIG. 6 position shown.

For this purpose 2 sheets of drawings 509525/3

Claims (8)

Patent claims: 1. Device for connecting butt-abutting plastic strips by means of a U-shaped folded one Adhesive strip with a longitudinally extending base with a worktop, with a das aligning the plastic strips in the transverse direction of the base ensuring device and a cutting device for trimming the joint and trimming them to match a device for pressing the adhesive strip on both sides over the joints, thereby characterized in that in a recess of the worktop (19) as a support for the abutting Plastic straps (1, 2) a carriage (21) with a knife (26) arranged to be longitudinally displaceable is, with a flap (45) movable on the carriage (21) as a carrier of the adhesive strip (3) is, and that when the slide (21) is lifted from the starting position, a pressing and folding device for the adhesive strip (3) can be passed below the joint of the plastic strips is. 2. Apparatus according to claim 1, characterized in that the carriage (21) under the action of a him in the rear rest position compelling spring (24) stands, in a front position and in an intermediate position can be brought and in these positions by means of an unlockable locking piece (27) and two stops (29, 39) can be fixed, the slide (21) being the knife in the front position (26) and a support plate in the intermediate position (63) facing the plastic tape joint. 3. Device according to claims 1 and 2 with the lid hinged to the base, characterized in that that on the cover (33) with the locking piece (27) interacting unlocking elements (36, 37) and a locking lug (38) holding the slide (21) in the front position in its (33) closed position are attached, the locking piece unlocked by the unlocking elements (36, 37) in the path of the Stop (39) for the intermediate position of the slide (21) is located. 4. Apparatus according to one or more of the preceding claims, characterized in that on the flap (45) interacting with the locking piece (27) in the intermediate position of the slide (21), the unlocking members (65, 66) are attached. 5. Apparatus according to one or more of the preceding claims, characterized in that the pressing and folding device for the adhesive strip (3) comprises a roller (68) rotatably mounted in the carriage (21), the surface (68) 55 _{λ of} which is the worktop ( 19) protrudes slightly, and which (68) folds the free half (36) of the adhesive strip (3) and presses against the plastic strips (1,2) when the carriage is moved into the rear rest position. 6. Apparatus according to one or more of the preceding claims, characterized in that at the front end of the base (17) upwardly projecting pins (57, 58) with mutual distance (S) are attached so that hairpin-shaped folded backing paper strips (7, 8) with the vertices lie against each other and wear a bridging adhesive strip (3) adhering and with recesses (12, 13) are provided with these exceptions (12, 13) can be slipped onto the pin (57, 58) 7. Apparatus according to one or more of the preceding claims, characterized in that daf on the cover (33) protruding pipe ends (59. 60 are present, in which the free ends of the Zap fen (57,58) in the closed state of the lid (33) protrude. 8. Apparatus according to claim 7, characterized net that the free ends (57 ', 58') of the pins (57 58) are tapered.