DE1604617A1 - Method and device for the machine production of drawstring bags - Google Patents

Description

DIPL-ING. W. GRÄMKOW 7 «.» α * .ir. · J '

■, _. _, _- 7StuHgart-Bad Cannstatt, the

7 Stuttgart-Bad Cannstatt

Marlthtraflea Phone 567261. / Bank accounts »~ '*" Deu & Ae Bonk AG., Branch. Bod Caniuta », No. 219915 ·» »■ _ In ¹ S 1 C Π / C" 1 * 7 Sladt.Glrokais.Slultgprt.Nr.9061 ' ^m6 ' ^U ^ I VVH V I. / Pojtjdieäkonlo ι Stuttgart 40734

Applicant;

AIfons Meyer, Waibllngen, Dionauschwatenstrasse 40.

"Process and device for machine manufacturing from cord ζ ugfbeut a ".

Addendum to patent ...... (M 65 170 X / 59a ² )

The main patent "relates to a" method for the machine production of _{drawstring bags, in which, inter alia,} the cords or pairs of cords are cut through and knotted between the bags, bag sections or solien webs when the bags are pulled apart.

The main purpose of the invention is to produce knots, those with high machine performance and machine relative simple production, there is little or no waste Require cord, and consists essentially in that the cords between the leading and trailing Bag or the like. separated and then on both sides of the irennsteile under tension by means of depending on the "procedure y The process of twisting 'twisted tying pliers must be knotted.

On the contrary to. known method, the invention has the advantage that two nodes are simultaneously retrieved in pairs

009883/1709

are provided, the knotting device and the separation or interface can be easily selected so that the remaining free ends of the cords can be linked to the desired knot without additional length.

According to a further feature of the invention is the method provided in such a way that the pair of cords guided over the tying pliers when the tying pliers are turned, it is grasped by the open mouth of the tongue and wrapped around in a loop, whereupon the incoming and outgoing sections are intertwined, then stripped from the gripper claws with the cord tensioned and pulled together in a knot. The length of the cord between the separating point and the knotting point can be the same as the the length of the cord required to make the knot must be measured.

The cord to be knotted is advantageously under tension, in particular spring tension, in the section adjacent to the separation point. held slidably, where, however, in the opposite section adjacent to the bag, the cord during the knot is held "

The invention further relates to details of the method and apparatus for making the knots. So clamping slides are provided in particular that the cords zwisohen clamp the Klemmeohieber and a counter-holder, in such a way that in this case are through the knotting pliers cords laid transversely preferred so that upon

009883/1709

the subsequent rotation of the knotting pliers gripped by these and can be looped around to make the knot. Ejectors activated depending on the work process ensure that the previously formed loops of the pair of cords are removed by pulling the cords from the tying pliers pull them together into a knot.

Further details of the method according to the invention and the device according to the invention are given with reference to the following Description of an embodiment shown in the drawing. Show in the drawing Fig. 1 is a perspective schematic representation of a twin knot according to the invention, namely on the left and on the right in two different positions and with partly broken off for the sake of clarity or omitted items and

Fig. 2 to 7 the knotting device in different positions to illustrate how the knot is made.

On the fixed frame 10, with which the two cord supports 11 are firmly connected, is by means of its shaft 12a in the Axis χ of the drive lever 12 pivotally mounted. The drive lever is driven by a drive shaft (not shown) controlled by a correspondingly designed cam. Act with the drive lever via an adjustable roller 14 provided and firmly connected to the shaft IJa, about the axis y swiveling intermediate plate I ^ three each with adjustable control rollers 15 provided levers 16, I7 and 18 together, of which the Lever 16 and I7 actuate hold-down devices I9 and 20 in such a way that this down in the direction of the arrow fi to - preferably

009883/1709

resilient - contact with the cord support 11 or in the direction of the arrow f ^ 'move upwards.

The lever 18 also actuates a spring cutting knife 21 also in the downward and upward direction according to the bearing fp or f ₂ ^f . ^The thread cutting knife can move into the gap 22 which is formed between the two cord support parts.

On both sides of the frame 10 of the other, the clamping slide 23 and 24 f in the direction of arrow., And f ¹ in the horizontal direction forwardly and rearwardly mounted slidably, while being guided by guide pins 25, 26 and slots 27, 28. The counterholders 29 and 30 cooperate with the clamping slides. For this purpose, the clamping slides 23 and 24 have a recess 3 ¹ which is open to the front and which is delimited at the bottom by a finger-like projection 32 serving as a support for the cord and at the top by a projection 32a which, on its upper side, has an inclined, possibly also has rounded surface 33. At the front end of the counter holder 29 or 30 there is an upwardly directed horn-like projection 34 which, in the rest position of the device shown on the left in FIG. 1, is a certain distance from the stop surface

35 on the clamping slide 23 and thereby a passage opening

36 leaves free, which is used for the passage of the cord and by moving the slide clamp forward in the direction of arrow f until it can be reduced to zero or almost to zero.

Furthermore, locking pawls 37 and 38 cooperate with the clamping slides 23 and 24, which are pivotable at 39 on the frame 10.

009883/1709

are supported and can be pivoted clockwise by means of adjusting screws 40 through the lever arms 41 of the lever 42, which is firmly connected to the shaft 13a and via this with the intermediate plate 13, so that their locking surfaces 43 release the upwardly projecting opposing surfaces 44 on the clamping slide 23 and 24, respectively and the latter are moved forward in the direction of arrow t under the action of pretensioned springs (not shown in the drawing).

A cord guide 45 is attached to each of the cord supports 11, which has a slot 46 and an inclined edge 47, on which the line to be guided can slide down into the slot 46.

Between the clamping slides 23, 24 and the cord guides 45 the knotting pliers 48 and 49 are arranged, which in the same way, possibly mirror images, are formed and of each a worm shaft 50 are driven. The worm shafts

50 are in turn from the opposite edges

51 of the drive lever 12 set in rotation by the edge

51 cooperate with the flattened, helical surfaces or 52a of the worm shaft 50, in such a way that at Movement of the drive lever in the direction of arrow g causes the worm shaft to rotate in accordance with the worm turns will.

The two knotting tongs 48 and 49 are controlled in a manner known per se by control cams , e.g. eccentric 53 *, in such a way that when the worm shafts 50 and thus the respective knotting tongs rotates, the rear tong © xiklaue 55 moves relative to the two front ones, For example , each with a Somie -! kenwel le 50 permanently connected pincer claws 54 alternately © under

«01083/1709

Opening of the claw mouth 56 removed and, with the closing of the claw mouth, approaches the same again, as this is still in detail in connection with the Pig. 2 to 6 will be described.

Furthermore, the cord guide rollers 59 and 60 are mounted on the levers 42 by means of the roller axles 57 and 58. In Fig. 1 the rollers 59 and 60 are shown only on the right hand side together with a short piece of the axles 57 and 58 while on On the left-hand side of the drawing, only the stub axles 57 and 58 on the lever 42 are shown for the sake of clarity. The line guide rollers 59 and 60 are used to transport the parallel to the carrier tapes 61 running cords as pairs of cords on the left side of the drawing "are indicated at 62a in the upper position and at 62b in the lower position. The carrier tapes 61 are driven by the machine and set the rollers 59, 60 in rotation, which are pressed against one another by springs (not shown).

The ejector is also located on the frame 10 by means of the hinge pin 26 63 stored. It has two upwardly pointing ejector arms 64 and a control arm 65, which by means of a (shown at 65a) roller or the like. taken along by the drive lever 12 is, wherein the control arm is supported at a location between the axis χ and the axis of the hinge pin 26 on the drive lever when this is in a certain pivot position Direction of arrow exceeds g.

The operation of the device described is as follows: In the left half of FIG. 1 , the device is shown before the insertion of the cord (position 62a of the same) or after the insertion of the cord (position 6Sb), while the right-hand side of FIG the device after completion of the knotting process

009883/1709

shows. In the operation of the device, however, apart from the mirror-image arrangement, both sides are actuated equally.

The in the film according to the main patent (M 65 I70 X / 39a ² )

inserted cords or pairs of cords 62 are through the left (not shown) roller guide pair 59 * 60 introduced and over the clamping slide 2j5, 24, the knotting pliers 48, 49, the Cord guides 45 and the cord supports 11 away and through the right pair of roller guides 59 * 60 led out. Adjacent bags, the ends of which are to be tied into knots, are here pulled apart so far that they move by means of the carrier tapes 61 on both sides of the device accordingly the main patent at a distance a from each other. The bags hang over the device, for example, to the front out. The bags and cords are driven by the machine by means of the endless carrier belts 6l, the lower one Strand, for example, on the antrabenden pulley 66 and the further pulleys 67 is returned.

To make the knot, the drive lever 12 and at the same time the intermediate plate IJ, which is placed against it under spring pressure, is pivoted in the direction of arrow g, together with the levers 42 connected to the intermediate plate IJ, on which the cord guide rollers 59 and 60 are stored. As a result of the movement of the drive lever or the string guide rollers, the cords 62 from FIG. ¹ in position 62a are lowered into position 62b, in that hold-down devices 19 and 20 are also pressed resiliently onto supports 11 at the same time. The cord 62 slides on the inclined surfaces 33 of the clamping slide 23 and 24 and on the inclined edges 47 of the

009883/1709 '

Cord guides 45 downward until they rest on the finger-like projections 32 rest and are inserted into the slots 46. The hold-downs 19 and 20 hold the cords on the supports 11 with such a spring force that the cords only against a certain frictional resistance can be moved in the longitudinal direction.

When the pairs of cords move downwards, they are laid in the throat 48a, 49a of the tying pliers 48 and 49, respectively, and are placed between the tying pliers and the cord guides 45 deflected forward, as shown for the lower cord layer 62b in FIG.

As soon as the pair of cords is pressed against the supports 11 by the hold-down devices 19 and 20, it is cut through in the slot 22 between the two supports 11 _{between the two hold-down devices by the cord severing knife 21 moving down in the direction of arrow f 2, which is also appropriately under spring pressure} .

During the world movement of the drive lever 12 in the direction of the arrow The pawls 37 and 38 are removed from the left pawl by means of the lever arms 41 and the adjusting screws 40 37 shown blocking position, in which the blocking surfaces 43 and 44 are in engagement, raised so that they assume the position of the right pawl 38. This puts the under spring force standing clamping slide 23 and 24 free, which are now in Arrow direction f *. Move jerkily forwards until the rollers 44a rest on the drive lever 12 again · Then, with the further lever movement g of the lever 12, the slides 23, 24 in Arrow direction f, shifted further until the stop surfaces 35 · ·

009883/1709

abut against the approaches 34 of the counter holder 29 and 30, as this one on the right side of the pig. I regarding the Clamping slide 24 and the counterholder. 30 is shown. The cord 62 is thereby in the layer 62b on the upward facing Horn attachment 34 clamped on the counter holder and moved forward beyond the pawl 54. This condition the device or the thread pair 62 is shown in FIG shown individually.

When the drive lever 12 continues to move in the direction of arrow g, the knotting tongs 48 and 49 are now set in rotation by means of the worm shaft 50, in that one edge 51 of the drive lever 12 slides along the spiral surface 52 of the respectively assigned worm shaft 50 and thereby rotates the knotting tongs accordingly. The knotting pliers 48, which are eccentrically mounted in the control cam 53 with their rigid claws 54 and the movable claw 55, form when their rotary movement in the direction of arrow ζ from the position according to FIG. 2 via the position according to FIGS. 3 and 4 into the position according to FIG 5 the cord loop · When turning the knotting pliers, eg 48, from the position according to FIG. 3 to the position according to FIG. 4, the forward angled cord 62 wraps around the pliers claws. Then the open Knüpfzange on the line guide 45 is in the further past turning over the line in the open mouth 56 of the Knüpfzange detected (Fig. 5) and when Weiterdrehefl the back closing by the control, curve $ & jCnMpfaange under the holding-down means 19 or 20 and pinched by the claws 55 # 56 to form the loop 68 (FIG. 6).

009883/1709

The tying pliers 48 (or correspondingly 49) remains in a vertical position Standing like this in Pig. 6 is shown. However, the drive lever 12 continues to move in the direction of arrow g, by placing the edge 51 on the flat surface 52a of the worm shaft 50 slides along and causes the ejector 63 by means of the Roller 65a and arm 65 from the position shown on the left in the position shown on the right is moved upwards. As a result, the cord loop 68 is in the direction of arrow h (FIG. 6) by means of one of the ejector arms 64 from the claws 54 and 55 of the knotting pliers 48 pulled over the end of the cord held by these and, since the cord on the one hand from the clamping slides 2j5, 24 and on the other hand, held in each case by the claws 54, 55 of the knotting pliers is pulled together to node 69 (Fig. 7).

During the backward movement of the drive lever 12 about the axis χ, the ejector 6 ^ is initially pivoted back, for example under the action of a spring in the direction of the arrow hg (FIG. 7). At the same time, the knotting pliers 48, 49 are turned back and the clamping slides 23, 24 are withdrawn from the drive lever by means of the pin 44a until they are locked in the position of the clamping slider 23 shown on the left by the pawl yj or 38 by means of the locking surfaces 4j5, 44 , whereby the locking takes place under the dead weight of the pawl or under the action of a spring. Finally, the cutting knife 21 and the hold-down devices 19, 20 are raised by means of the levers 18 and 16, 17 and the cord guide rollers 59, 60 are raised by means of the levers 42.

0098 8 3/17 of

Claims (1)

A ns ρ r ü ehe 1. Process for the machine production of drawstring bags, with the cords or pairs of cords ododglo between them when the bags or oil sections are opened be cut through and knotted, in particular according to patent ..... (M 65 170 x / 39a), characterized in that the cords between the leading and trailing in pairs the bag or the like «separated and then / on both sides of the Separation point tied under tension by means of twisting tongs that are rotated depending on the process will. 2. The method (in particular) according to claim 1, characterized in that that the cord passed over the tying pliers (or cords) when twisting the tying pliers from the opened pliers jaws and put around in a noose and the incoming and outgoing section, intertwined, then stripped from the pliers claws while the cord is taut and pulled together to form a knot will", 3. The method according to claim 1 and 2, characterized in that the cord length between the separation point and knot point essentially the same as that used to create the node required cord length is measured 009883/1709 4. The method according to claim 1 to 3 »characterized in that the cord to be knotted in which the separating point is located Section under tension, especially over tension, slidable, however, in the opposite Section is held firmly during the knotting « 5. The method according to claim 1 to 4, characterized in that the cord placed over the neck of the tying pliers before the knotting with its incoming and outgoing section in the longitudinal direction of the pliers rotation axis is pulled forward against the transverse plane of the pliers jaws, so that when the pliers rotate the open jaws of the pliers can grab the string and put it in a noose. 6. The method according to claim 1 to 5, characterized in that that the opening and closing of the pliers jaws automatically depending on the rotational movement of the knotting pliers and the rotary movement of the tying pliers automatically depending on the bag or "string feed", from holding and separating the cord or cords is made " 7β device for performing the method according to claim 1 to 6, characterized by two spaced apart in the transport direction of the bags or cords Knotting tongs (48, 49) in front of and behind in the direction of transport Holding devices (3O, 34i 19t20,11) and one - preferably in a middle plane of symmetry - between the knotting pliers arranged separating 009883/1709 knives (21) and means for driving the plague holding devices, the cutting knife and the tying pliers depending on each other or on the drive for transporting the bags or cords. 8. Apparatus according to claim 7> characterized in that on each tying pliers (48, 49) depending on the drive ejector (63) or ejector arm driven by the knotting pliers (64) for stripping the formed loop (68) from the pincer claws (54, 55) and for drawing the loop together is provided to a knot (69) with the cord held in place. 9. Apparatus according to claim 7 and 8, characterized in that in front of the front and behind the rear knotting pliers (48, 49) or the associated plague holding devices (30, 34; 19, 2o) lowerable and liftable guide rollers (59, 60) are arranged are. lo. Device according to Claims 7 to 9, characterized by the rotatable knotting tongs (48, 49) and the cord supports (11) or counter support (29, 30) supporting frame (lo) and drive means (12) driven by the machine drive ■ which the guide means of the cord or cords, z. B. Pührungsrolienpaare (59, 60), Feethaltervorrlchtungen (30, 34; 19, 2o), separating knife (21) and ejector (63) in the lifting or lowering direction relative to the frame (lo) and the tying pliers (48, 49) driven in the direction of rotation 009383/1709 11. The device according to claim 10, characterized by one of the knotting pliers (48,49) upstream or downstream, acting as a clamping device (23 »29» 24,30), the movable part (23; 24) of which a movement (f ^ - f ^ ¹ perpendicular to the lifting and lowering movement (f ^ ', f.) of the guide means for the cords for pulling them forward in the direction of the axis of rotation of the knotting pliers is given ο 12. An apparatus for tying a string or a cord bundle having a rotatable Knüpfzange and one each upstream in line direction and downstream guide or ₀ retaining device, in particular according to claim 7 to 11 and for performing the method according to claim 1 to 6, characterized in that the upstream and downstream guiding or retaining devices (30,34; t9> 20) are designed in such a way that they remove the incoming and / or outgoing sections of the cords placed over the throat (48a, 49a) of the tying pliers when the Pull plague holding devices forward against the pliers head and thereby enable the cords to be gripped and loops to be formed. 13. The apparatus according to claim 12, characterized in that the movable parts (23; 19,20) of the two upstream and downstream holding means approximately mutually perpendicular, right movement (f, jf.j) in planes perpendicular to perform Sohnurrichtung · i 009883/1709 14e device according to. Claim. 13, characterized in that the holding device (19, 20), which can be actuated transversely to the axis of rotation of the knotting pliers, with a relatively stationary one Inclined guide (47) cooperates for the cords in such a way that the that / movement of the movable part (19, 20) of this device, the section guided over the inclined guide Cords both a lowering movement into the throat (48a, 49a) as of the tongs ^{/ is} also moved forward in the direction of the tong head, in particular into a clamping slot (46), and / or that the movable part (23,24) of the pest holding device which can be actuated in the direction of the axis of rotation of the tongs and which is preferably a movable part with the movable part Has inclined guide (33) for the cords, on which the cords can slide during their lowering movement onto a receiving surface (31), is designed as a clamping slide, which moves the cords between the clamping slide (23 »24) and a relatively stationary one during its forward movement Counterholder (29; 30) clamped 15. The device according to claim 7 to 14, characterized in that the holding devices (23,24; 19,20) resiliently in their holding or clamping position are held. 16. The device according to claim 7 to 15, characterized in that that the movable rope at least one of the Haltebzw ο clamping device by a hurry or locking device (37,38,43) held in an ineffective position and shortly before the knotting of the cord or cords released and jerked into the holding or clamping position under the action of a spring is brought BADORI81NAL 009883/1709 -T6 - 17. Torrichtung na _c h claim 7 to 16, characterized in that the knotting pliers (48,49) is rotatably mounted in an eccentric guide (53), which a relative movement of the San-'enlclv.uen (54, 55) caused the forceps jaws (56) to open and close 18o device according to claims 7 to 17, characterized in that the knotting tongs (48, 49) are set in rotation by means of a worm shaft (50) or the like, e.g. by means of winding surfaces (52) into which a guide member controlled by the drive, z _o B _o a guide edge (51) of a drive lever (12) actuated by a control shaft engages. 19o device according to claim 7 to 18, characterized in that that a drive lever (12) actuated by a control shaft or a lever (42) coupled to it, the guide members, in particular guide rollers (59, 60), for the cords for lowering and lifting movement of the same as well as lever arms (41), by means of which moving parts of the Festhaltebzw. Clamping devices adjusted or released for adjustment from a latching or blocking position. 20c device according to claim 7 to 19, characterized in that that for locking a locking slide serving as a lockable part (23,24) of the retaining or clamping device (23,24) a pawl-like locking lever (37,38) controlled by the drive is provided, which by means of a locking stop (43) holds the slide clamp in the ineffective locked position and by means of an adjustable release pad (40) releases from the locked position. 00 9 8 83/1709 Blank page