DE1586009A1 - Electric machine for the automatic closing of paper bags (bags) generally by means of a thread with a metal core - Google Patents

Description

Patent attorney Dr. Wolf Müller Bonn
Adenauerallee 46a

Bonn »September 14, 1967 12621/67 Dr.M./J.

Applicant;

Renato CAMMILLI via Rocca Tedalda Florence. (Italy)

Roberto GIANNELLI via Aretina 220 Florence (Italy)

Patent application

Electric machine for automatic spanking of paper aäoken (bags) generally convey one

Thread s with a metal core

The present invention relates to a »lektrisoh controlled Machine with automatic operation and increased yield. With this machine a thread is made by a thread tight lacing of the neck of the with any product

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already filled paper sack (bag) made of any material any size can be made. The thread segment should preferably made of plastic with a metal core; the two ends are coiled onto each other in a spiral.

In detail, the following is to be achieved: housing for receiving the wound thread; Controller for drive and Braking the filament spool; Pulling device for the thread and preparation of the part to be used; Control devices the advancement of the thread; Devices for advancing the prepared portion of thread into a cutter; Device for cutting through the prepared part of the thread; Devices for Transporting and winding up the thread segment on the belt neck; Bringing the ends of the thread segment together via a twisting device; Control unit for driving and stopping the twisting device; Device for automatic starting of the machine; Device for programming the working cycle of the Machine.

The machine is described in more detail below. The attached Drawings represent a preferred and eobesatic Form of execution, which is only intended as a practical representation of the invention and should not be considered the only possible one Form of execution to be considered iet.

Fig. 1 shows an overall view from above;

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Fig. 2 shows an overall view from below;

Fig. 3 shows a side section of the bobbin block with thread braking and pulling device again;

Fig. 4 gives a front and side view of the twine block again;

Fig. 5 gives a section in front and side view of the Control blocks for driving and stopping the thread orechub device again.

With regard to the essential structure of the machine, the following are provided: a housing 1a for a thread bobbin; Attachment takes place freely on a vertical cylinder 2, on whose outer surface a shoe brake 4 in the favorable Time acts and leads to a standstill of the cylinder; a return spring 5, preferably with a cylindrical screw, one end being connected to a brake lever 4a and the other end with an arm 6 which is firmly connected to a cantilever structure 7 of the machine; a lever 8 for the Thread control 3; the lever is / Pos. 8a of the structure 7 supported; It is actuated by a lever 9 supported in position 9a of the superstructure. The lever itself is connected to a linkage 10 and a lever 11 supported in pos. 11a. The free end of the lever 11 is provided with a bearing 14, this by a spring action 16 with a nooke 15

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connected is. This nook is connected to a coaxial circular plate 15a, so a straight line migration of the bearing 14 is determined by the cam strength 15, while the duration of the connection is determined by the angular profile of the nooks 15 and of the plate 15a, which is located in front of the zone j. reduced by the nooke, is determined. These «* values can be changed at will; They are, however, dependent on the respective Determine the purpose of the machine.

The aforementioned Nooke 15 is also firmly connected to a shaft 17, whose! drive from an electric motor 13 by sin Speed reduction gear with wheels 18a and Gear 39 is derived.

A toothed sector 19 is provided on the same shaft 17. In parallel sru this sector and firmly connected with it - however somewhat offset - a correspondingly profiled disc 20 is provided (Fig. 5). The aforementioned sector 19 can with a conical wheel (bevel wheel) 21 are coupled »on whose shaft a fixed wheel 23 is also mounted. The outer surface this wheel is coated with rubber accordingly. In the lower part of this bevel gear 21 is a diametrically extending groove 21a provided, which encloses part of the edge of the profiled disc 20. The way it works is that at the moment of the engagement between the sector 19a and the bevel gear 21, the tapered edge 20a of the disc 20 in front of the groove 21a lies without penetrating into it. Conversely, the corresponding

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accordingly rotating disk 20 - when the toothing 19a the bevel gear engagement 21 leaves - in the groove 21a and blocks the drive of the wheel

The drive of the electric motor is achieved by the action of the neck 24 of a suitably folded and in the slot 23 introduced into a bag in Pos. 26a dee Structure 7 supported lever arm 26, which presses a rod 27 upwards, the end 27a of which after connection with a corresponding profiled and free-running cam 28 on the shaft 17 closes a switch 29 for starting the electric motor 18 causes. The aforementioned squat 28 is designed so that the delivery of electrical current to the motor is ensured for the time that exactly the duty cycle corresponds to the squat 15, with a spring 50 for the Bringing back the nooke 28 is provided in the starting position. A second wheel 31 is provided in front of the wheel 23, which is freely mounted on a lever 32, which in Poe. 32a supported and the wheel 23 by means of a spring 33 closely matched is so that the lever movement 8 mediated by the cylinder 8b is called back and by the cylinder 34 accordingly of a favorable diameter as well as from a guide cat 35 guided thread in the fixed bearing 36 of a cutting device 37 can advance. The movement of work-., stroke of this cutting device 37 is determined by a frontal nooke 38, which is inserted and filtt on the gear 39, is connected to the shaft 17} corresponding devices ilr, the retrieval of the cutting device are provided.

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1 $ 86009

The piece of thread 3a cut off by the knife 37 lies in FIG two bores 40a provided on the two movable arms of a jaw gripper. The lateral transfer movement (Translation) of these arms is actuated by the lever 9 via a pin 40c connected to a gripper support rod 40b determined »which can slide in an eyelet 9b of the lever 9 and a slot 7a of the structure 7.

The piece of thread 3a dragged by the gripper surrounds the neck of the bag in a spiral shape, and after closing the jaws connected to two fixed horns 41 in front of it win the thread segment near a rotating element brought and anchored with two protruding and correspondingly profiled hooks 48, which by mutual tension Place the latter on the two ends of the thread in a spiral around the neck of the bag, which closes it completely. That rotating eggs®! **: 42 transfers the drive of this shaft 17 a squat 44 with toothed sector 44b and protruding profiled Edge 44a, as well as by inserting a chain and one with a larger dimensioned profile disk 46a coupled and coaxially designed coil (drive wheel) 46, um * -, was such that when the drive wheel 46 enters the gr toothed zone 44b of the nook 44 the curvilinear band of the disc

i 46a does not touch the edge 44a and thus ι benefits the element 32. Conversely, the rectilinear part of the profile of the disc 46a touches the edge 44a when the drive wheel 46 lies outside the toothed zone 46b of the nook 44, and the element 42 stands still as a result. BATH ORIGINAL

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The machine works as follows: The thread 3 is over the feed trolley 35 and the cutting device 36 are processed ι the neck 24 of a suitably folded bag is inserted into the slot 25, and through the against the lever 26 applied pressure, the electric heater is started automatically, whereby the thread advances into the looper 40, which is effected by the wheels 23 and 31. The thread piece 3a is then sheared off by the cutter 37; afterward the segment 3a encloses the neck of the bag by means of the gripper 40, and finally the thread ends are connected by twisting them spirally together by means of the rotating ones Hook 46. Pulling, processing and advancement of a new thread piece take place simultaneously and automatically same length up to the fixed rope 36 of the cutting device, to be used when closing another bag.

In practice, the execution details can be found in (KIe ich-Wertigkeit the fora, the dimensions, the attachment of each Elements and the nature of the material used vary without, however, falling within the scope of this invention underlying concept and thus the area of this inventive concept to leave·

Claims

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Claims (1)

Claims 3SiSiSSS5SSiKSSBSüSJSSSSίίϊί — ISSS35ϋStSSSX * JJSSSSS SI 1.Electric machine for automatic closing (tying) of paper sacks (bags) in general - by means of a thread with a metal core, characterized in that with a predetermined speed and worker rhythm, preferably made of plastic with a metal core Thread segment with one depending on the purpose of the machine beforehand length to be determined taken from a coil, cut and in a single turn around the neck of a paper sack (Bag) and firmly connected by twisting its ends together. 2nd machine. according to claim 1, characterized in that it is started automatically by the neck (24) of a folded and vertically held bag is determined, which is to be completely inserted into a slot (25) to thereby sufficiently open to be able to press a lever (26), which by interposing a linkage (27) and a free-running on a Shaft (17) attached profiled disc (28) to an electrical switch (39) for starting an electrical - 9 109824/0093 ^ßAD original Motor (18) acts, the electric motor driving the drive via a speed reducer (18a) and a gear (39) leads to a control shaft (17) of the machine. 3. Machine according to claims 1 or 2, characterized in that the following is attached to said shaft (17) is: a nook (15) firmly connected to a coaxial circular plate (15a); a disc (19) »the side a sector (19a) carries with tooth crown; a profiled disc (20); a washer (44), the enclosure of which is partially made up of teeth (44b) for. the active phase consists of being the disc also has a lateral edge (44a) of a bit projecting profile opposite the non-toothed zone of the disc (44) and opposite the toothed zone (44b) the profile is reentered; a gear (39) which on a base surface a has a raised circular sector with a curvilinear profile (58). 4. Machine according to claims 1 to 3, characterized in that that the above-mentioned nooke (15) or the plate (15a) is permanently connected to the bearing (14); the camp is owned by one Lever (11) carried, which is connected to a linkage (10) and acts in Pos. (12) on a lever (9); the lever (9) controls the unwinding of a thread (3) from the bobbin (1a) by means of a lever (3) and a roller (8b) as well as through In between, hold a back gear (4b), because "free running a lever (4a) is attached to the other end a 109824/0093 BAD o _R19 , nal Brake shoe owns to regulate the speed and to brake the take-up reel (1a), which is running freely on a Cylinder (2) is rotatable; the roller (3b) kebrt back in the rest position (Fig. 1) when the bearing (14) is from the The cam (15) moves towards the plate (15a). 5. Machine according to claims 1 to 4, characterized in that the aforementioned lever (9) simultaneously controls a gripper with two jaws (40) by means of a pin (40o) connected to a rod (40b) of the gripper (40), wherein the pin slides between an eyelet (9b) of the lever (9) and a slot (7a) of the cantilevered structure (7) and the movement of the gripper (40), which is perpendicular to the pad axis. (3a), is synchronized with the movement of the lever (8) so that the gripper (40) and the roller (8b) arrive at the end of the working stroke and at the end of the return travel simultaneously; the swinging jaws of this gripper (40) are pierced in pos. (40a) in order to receive and transport a load segment (3a); further characterized in that a device for switching off the electric motor is provided at the end of the return travel of the rod (40b) and gate directions (47) for braking the motor shaft. ^j 6. Machine according to claims 1 to 5 »characterized in that said disc (19) with toothed crown sector (19a) at Engaging with a conical drive wheel (coil 21) the drive 109824/0093 bad transfers to a wheel (23) with a vertical Aobee, which together with a second swinging wheel ί51) - u »thereby always the first wheel. to touch - dragging the through one Wheel (34) and τοη of a guide cat (35) guided thread (3) in the direction of a cutting device (36), wherein in said conical drive wheel (bobbin) a diametrical groove (21a) is provided in the lower part, which · to enclose the edge of a disk (20) which runs parallel to the disk (19) and is firmly connected to the shaft (17); this disc (20) is designed as a circular arc with a taper (20a) so that the zone (20a) lies in front of the hat (21a) (and a so not within the same) if the sector (19 *) in It is engaged with the spool (21), and that in the opposite case - albeit sliding - it remains bound in the lut (21a), until the sector (19a) engages in the spool (21), the two disks (19) and (20) being so toothed on the shaft (17) are that the working phase of the machine (i.e. the advance des Fpdene 3) takes place when the lever (8) and the gripper (40) are in the rest position, and this with each shaft revolution (17); the aforementioned wheel (23) has a corresponding diameter, to determine the advancement of the thread by a specified length; drj3 thread return wheel (34) mentioned above can be mounted in this way be that it can be moved laterally in relation to the thread to the thread in the Einatellphaee of the bobbin and Slightly insert the thread into the lUhrunga cat by hand can. - 12 109824/0093 BADORlQiNAL 7. Machine. according to claims 1 to 6, characterized in that that the disc (44) below a coil (^) with parallel Axis to the shaft (17), which can engage in the teeth (44b), the coil (46) fixed to an overlying Disc (46a) is connected, which always touches the edge (44a), the shape of this edge being an arc of a circle and corresponds to a rectilinear part; the position opposite the coil (46) is such that the engagement between the Coil (46) and the teeth (44b) takes place when the disc (46a) of the edge (44a) faces the curvilinear part; however, there is no drive transmission between - (44) and. (46) when the disc (46a) of the edge (44a) is the straight Part turns; the coil (46) transmits the drive via a Chain (45) on a rotating head (42) which has two laterally protruding and profiled hooks (43) which are diametrically are attached opposite and the thread ends (3a) should grasp the paper sack (bag) through a spiral Wrapping to seal; In addition, on the side of the rotating elements (42) are two spread and attached to the structure (structure 7) attached horns (41) are provided, which effect the partial closing of the gripper (40) and bringing it together the jaws with the hooks (43) should enable. ü. Machine according to Claims 1 to 7, characterized in that that the gear (39) is laterally provided with a raised and curvilinear in profile circular sector (38) which indirectly or directly on the bridge of a guillotine cutting device 109824/0093 SAD original -13- device (37) acts with the help of a fixed anvil (36) cuts the thread; the X ^ ge dee sector (36) Is such that it determines the working stroke (run) of the cutting device when the disc (20) is in engagement with the! Thread; Devices for retrieving the cutter ** (37) in the rest position are provided. 9. machine according to claims 1 to 6, characterized in that that the thread is stored on a bobbin (1a); this· The bobbin is mounted freely on a cylinder (2a) and the thread is held by the leverage (3) and the plane in between the reels (8b) and (4b) unwound; the sink can unwind if the lever (3) has a threaded needle ü forms, while with interruption of the fog effect (3) the Coil (Ta) automatically by one on the inner band of the Coil acting chock (4) pops off. BATH ORIGINAL 109824/0093 Blank page