DE596103C - Device for folding a filling opening into a sack with side gussets, preferably made of paper, closed at the top and bottom - Google Patents

Description

Device for folding a filling opening into a preferably made of paper, - - closed at the top and bottom end of the sack with side gussets The invention relates to a device for folding a filling opening into a single-walled or multi-walled sack, preferably made of paper, which "essentially consists of one Sack hose piece consists, which is provided with gussets on both sides and is closed at both the top and bottom. Such a sack must have a filling opening -to bring the too. have transported goods.

It has already been proposed to attach such filling openings to the corners of the bags before closing the associated hose end: So far, this has usually only happened with bags without gussets, which make the attachment of the filling opening very difficult. The device according to the invention is used to position eggs in a valve bag known per se, in which the filling valve -at the end of a gusset- is attached before the associated hose end is closed and -for this purpose- this end of the gusset itself is reshaped. The filling valve of such a sack consists of a fold open to the inside of the sack, the apex line between the walls of the gusset, starting at this, protruding outwards approximately to the "outer -Rand of the gusset and then approximately in the opposite direction to the Sack inside jumps in. "With the device according to the invention -the filling opening is caused in such a way that the side fold, at the end of which the filling opening is to be attached, is compressed at a distance corresponding to the height of the valve to be folded, whereupon in per se for the Production of cross bottoms' in a known manner, the side walls of the side gusset lying between the corner and the pressing point spread apart and the bag corner is folded inward, to finally collapse the bag walls over this inwardly folded part while leaving the filling opening open. - For this purpose, the device forming the subject of the invention is designed in such a way that apart from per se known gripping devices for .Erfassen der Seitenfalten.von outside and spreading devices, which engage in the side fold, also folding devices are provided, which are provided between the spread-apart side walls Fold the spread-out corners of the sack inwards and over which the spread-apart side walls are put back together again by the spreading device. In order to make this possible, the gripping devices and the spreading devices are each about a rotation axis perpendicular to the gusset and the folding device is in one with the. Center plane of the side fold coinciding plane arranged swingable. By means of a drive going back and forth, the gripper device is first laid down and then the spreading device is erected. Then the folding device is moved forward and takes care of the folding of the previously spread-open end of the bag.

By arranging the folding devices. on opposite sides it is achieved that when using a bag tube twice the bag length, which is then cut into 2 sack pieces, each with a filling opening on 2 sacks can be folded in at the same time.

Using the exemplary embodiment of the drawing, the device should be explained in more detail, in which Fig. i is a plan view of a machine according to of the invention, Figs. 2, 5 and 6 plan views of the device for forming the Filling openings (bag valve) in different positions, Fig. 3 and 4 side views the device for forming the filling opening in different positions and Fig.7 to 9 perspective representations of the various stages in the formation of the filling opening are.

In Fig: i is the device for forming the filling opening (bag valve) : in combination with other elements "of an automatic cutting device Desired bag length of one! Hose without end made of sack material shown, one corner of each sack length is pinched or folded in.

This machine includes a slot front. Direction A, a device B for incrementally advancing a 'sack tube in its longitudinal direction, - also a cutting device C for cutting the tube along a straight transverse line, cutting knife D and D' for cutting the tube along opposite, mutually offset transverse lines, and devices E and -B '. To form the filling openings and removal devices F and F'.

In Fig. I, a bag tube 27 is attached to the machine by any one Place, for example from a printing press, and is supplied by the device B advanced. Below the path of the sack tube 27, a pair is vertical reciprocating knife angdorder, which underneath "the guide plate 28 are stored - and work in such a way that they each have a short longitudinal slot zoo, zoo 'in the bag tube in the vicinity of each corner of one finally obtained from the tube Cut into the individual sack.

Any suitable device can be used to drive these knives simultaneously; they are preferably moved up and down by the drive shaft 3 1 at the same time once during each revolution of the drive shaft. In view of the fact that the construction, arrangement and mode of operation of this slot device is not the subject of the invention, a more detailed description of this drive is omitted.

From the Schlitzvorrichtung.A the bag tube 27 enters the feed device B and from this into the cutting device C, which in this example consists of a Knife 65 consists, which is actuated by a disc on the shaft 49 and at one revolution of the shaft 49 also means that the bag tube is completely cut performs. To cut the tube along two staggered against each other To carry out transverse lines, a frame 67 is provided, the two cutting plates 68 carries, with one of the cutting edges provided on the end face, a knife 69 cooperates, which is actuated by a disk 7o on the shaft 57. the The cutting edge of the knife 69 extends from one side of the bag tube 27 (in the Drawing of Fig. 3 above) to the slot 2oo ', which is near the other side of the -Hose- had been cut. In the same way, the knife 71 is enough, operated by a disc 72 on the shaft 49 across the opposite one other side of the tube (in Fig. i below) up to the slot near the zoo opposite side.

Any suitable means can be used to drive the shafts 49 and 57 in opposite directions so that the knives 69 and 71 are moved downwards at the same time and a rectangular piece is cut out of the tube through the lines of intersection of the two knives 69, 71 on the one hand and the previously cut longitudinal slots Zoo, Zoo 'on the other hand is limited. This cut-out part of the hose between the knives and slots falls down as the knives move downwards. In addition, the sack parts between the zoo and zoo 'slots and the adjacent edge of the tube are simply cut through by the knives 69 and 71, respectively.

The device B for advancing the bag tube does not constitute an object of the invention and needs. therefore not to be described in detail because - any feed device that intermittently works and advances twice the length of the bag each time it is advanced can.

This part of the device can contain, for example, a lower feed roller 148 and an upper feed roller 149, between which the sack tube 27 passes. For reasons of convenience, an opening 52 can be provided in the guide plate 28 through which a mark 153 is visible on the sack tube when the tube has been pushed forward correctly. These marks 153 are attached to the tube at distances from one another which correspond to twice the length of the bag, so that the individual marks appear in the observation opening 152 each time the tube is correctly advanced by twice the length of the bag. In this way you can easily check that the feed device is working correctly and, if necessary, readjust it.

As mentioned, the bag tube 27 is increased by two bag lengths each time advanced during one revolution of the drive shaft, so that during each period the standstill of the hose between two feeds the slots Zoo, 2oo ', ... which had previously been cut by the slitting device A; at the end the line of intersection of the knives 69 and 71, respectively.

The drive of the device is timed so that the knife-69.7I be actuated immediately as soon as the hose comes to a standstill after the feed has been carried out.

The machine according to the invention is primarily intended for bags with gussets, and devices are therefore provided for folding these gussets, for example short folding devices io2 in front of the cutting knife 65. SO soon the tube is advanced in front of the knife 65, the sides of the hose are attached first by a guide 79 on the device F ″ and then by a guide 79. of the device F, while the sides of the hose opposite these guides 79th are guided by other guide elements 104 on the devices E and E 'to form the filling opening. The guides 79 are beveled at io5 at the ends at which the hose enters; the folding devices io2 are beveled at the ends io6 and the guides 104 at the ends 107.

As a result, the hose runs easily into the guides and the side folds are folded in correctly. This arrangement is particularly useful when the hose is to be shaped so that the distance between the inner lines of the side gussets should be constant, even if there are minor irregularities in the overall width2 of the hose are unintentionally present.

The removal devices F and F 'are constructed similarly to one another; the removal device F 'is on the shaft 57 and the removal device F on the shaft 49 mounted. -The two take-off devices are offset from one another in such a way that that the finished-cut individual sacks from a double sack length to opposite Pages are carried out of the machine.

The individual elements of the removal devices are also correspondingly driven in opposite direction; the associated drive devices should not be described in more detail here, since they are not the subject of the invention are. The devices E and E 'for folding in the filling opening are in the same way - equal to each other. - The device E is driven by the shaft 49 and the device E 'driven by the shaft 57. Because of the same design of these devices E and E 'it is sufficient if only one of them and its drive is described here.

The device for folding in the filling opening is in a housing i io (Fig. 2, 3, 4, 5, 6) installed. The essential elements of this device consist of grippers i i i (Fig. i etc.), spreading devices 1I2 and folding element i 13. The grippers i i i are so on opposite sides of the hose and accordingly offset from one another by one each to the side edge of the bag tube parallel pin 114 rotatably arranged that they a short distance inwardly transversely can reach over the hose. Each gripper i i i is connected to each one arm, which carries a roller 115 at its end, which is on a control surface 116 of a control rod 117 is running. An oscillating shaft i 18 is located under the housing i io in a bearing iig held and firmly connected to an upward-facing arm i2o, which has a Handlebar i21 (Fig..3, 4) drives the slide bar i17 and thus moves it back and forth. The swing shaft 118 is driven by the arm 124 attached to it, the carries a stop surface 125 on which a pin 123 on the disc 122 (Fig. i) once during one revolution of this disk and its drive shaft 49 impinges and here the; Oscillating shaft 118 clockwise (based on Fig. 3, 4) by one rotated the corresponding angle until the stop i25 is released again, whereupon the oscillating shaft 118 in the starting position (counterclockwise = the direction on Fig. 3, 4) swings back. A slide rod 126- (Fig. 2 etc.) is mounted so that it can be moved lengthwise in the housing and has a shoulder 127: provided, which can strike against the rear end of the slide rod ii7; the right mutual position of the rods 126, 117 is through. a bolt slot guide 128 (Fig. 3, 4) secured.

A compression spring 133 rests against an adjustable ring 132 on the rod 126, which tries to move the rod 126 to the left in the various figures and keeps the spreaders normally closed. The spreading members i i2 are rotatably mounted about a common axis 129. Each spreading. element is rigidly connected to one eye 131 each and each eye is in turn connected to one end of the rod 126 by a link 130.

The folding finger 113 is at 134 by one. vertical axis (fig. 5, 6) rotatably mounted and hinged to a handlebar 137 which is connected to the the bent arm 136 of a double lever 135 is articulated, the latter on the Housing i io is rotatably mounted. The other arm 138 of the double lever 135 ends by way of a stop 139 on the sliding rod 126. Another stop 141 on the rod 126 is provided on the other side of the arm 138.

A friction element, pressed on from one side, acts vertically on the arm 137 and is indicated at 140 (Ab. 3, 4, 5, 6) and off; consists of a spring which rests against an adjusting screw at its outer end and presses on the handlebar 137 at its inner end with the interposition of a suitable friction element, so that this and thus the folding finger 113 stops in every set position = young. The spreading device 112 consists of two individual elements, both of which are rotatably mounted on the axis 129 and have a triangular cross-section. One side of these spreading elements runs obliquely outwards and these spreading elements are arranged in such a way that they engage in the side gusset of the tube.

This device works in the following way: Does the pin 123 on the stopper 125 is hierdurch- -and the oscillating shaft i 1 8 in the clockwise direction (Fig. 3 ', etc.) is rotated, so the sliding rod 117 moves to the right and the roles i 15 migrate outwards on the inclined contact surfaces 1i6, whereby the grippers iii are initially applied to the hose. As the slide rod 117 moves further, it strikes against the shoulder 127 of the rod 126 and takes it with it to the right in the drawing, as a result of which the spreading elements 112 over. the handlebars 130 and eyes 131 are unfolded ".

This also "but also the side parts of the sack between the Sack end and the place. where they are held together by the grippers i i i, spread apart and the gusset erected.

The side parts of the gusset that have been erected in this way are now on the one hand between the triangular expansion elements and the grippers in a folded gusset held, while on the other hand the part of the sack material located in the gusset is aligned in front of the expansion elements and stretched smooth, so that this Part of the sack material rests on the outside of the triangular expansion elements and further along the line 142 (Fig. 7) in a fairly flat surface to the end of the sack erects.

In relation to Fig. 7, one has to imagine the matter as that behind the spreading elements i i2 through. the gripper i i i held gusset pops up. and in a triangular gusset behind and in front of the triangular tip of the expansion element 1z2 lies and along the line 142 then in the front remaining part the corner of the sack passes over.

When the rod 126 comes to the end of its movement to the right in the drawing, the stop 139 strikes the arm 138, whereby the finger 113 is swung out about its pin 134 into a position which is transverse to the sack. Here, the finger 113 grasps the opened part of the side fold of the hose near the end of the sack and pinches it inward between the spread-apart sides of the hose, so that this sack part is folded inwards around the line 142 on the one hand, but also the on the other - The upper and lower parts of the end of the sack are taken along and folded inwards around the inclined line 143 and finally - a new fold is created with the apex line r43a. This transition stage is shown in Fig. 8.

Due to the combined effect of the spreading devices ii2 and des Folding finger 113 is thus formed a beveled corner at the end of the bag, which represents the filling opening, and which is thus laterally limited by the two inwardly folded flaps which are folded inwardly around lines 143, 142 and butt inside each other in the vertex line 143a.

These flaps merge into two triangular gussets in the side fold, which lie on both sides of the triangular end of the spreading devices 112, the axis of rotation 129 of which is perpendicular - to the advancing direction of the sacks to be treated. These two triangular gussets as well as part of the two flaps that surround the filling opening are thus, as it were, in the continuation of the side fold. As soon as the pin 123 runs off the stop surface 125 , the spring 133 moves the rod i26. back to their original position. This initially closes the spreading devices 112 again. The friction element 140 holds the finger 113 in its folded position until the stop 141 ... strikes the arm 138 (FIG. 6). Because the spreading devices 112 are closed between the previously mentioned gussets of the sack walls, the folded flaps 144 and the adjoining outer portions of the sack end are bent around the finger 113 along the apex line 143d and placed one on top of the other. As soon as this has happened, the stop 141 hits the arm 138 and pulls the finger 113 @ out of the now closed fold. -The folded flaps 144 now form a flat valve (filling opening) which is open at 145 and results in a beveled corner of the bag end. The end of the bag can then be closed at the same time as the filling opening by a seam or the like along the line 146. The corresponding position of all active parts after pulling out the folding finger 113 is shown in FIG. 9.

As soon as the rod 126 is under the action of the spring 133 in its initial position has returned, the slide rod t t 7 is fully advanced under the action of the rollers 115, which against the control surface 116 by a spring 147 between the ends of the double levers carrying the grippers i i i are pressed on.

With this advance of the rod 117 (in the drawing of Fig. 3 after left) the rollers 115 move the latter on the inclined control surface 116 downwards so that the gripping devices are lifted from the end of the bag, whereby the bag is released and now removed from the machine by the discharge device can be. With the slide bar 117, the arms 120, 124 and the swing shaft also return 118 in After their starting position so the back. ' The filler opening is folded in, the bags are moved by the devices F and F 'which are arranged around the shafts 49 and 57 are rotatably arranged from the. Machine removed.

Any suitable drive can be used to drive the gripper claws @ 86 to close the sack as soon as the filling opening has been folded. Usually this happens before the grapple claws have moved up enough to that the sack could no longer be properly grasped. By moving the The gripper is: the sack is pulled out of the device for folding in the filling opening and swung out on the opposite side, so that the sack is out of the feed path the bag tube is removed. The devices F and F 'work simultaneously, so that they swing two lengths of sack out of the machine at the same time.

After half a turn, the swings in Fig. I swing outwards devices shown 79, 86 in; the situation, which the previously treated identical, but by 180 ° compared to the. first staggered devices 79, 86 accepted have so that now the bag tube 27 is pushed forward again by two bag lengths can be. Of course, it can also be sufficient that one is on each side a single device 79, 86 provides, and the device 79 turns around each time rotates a full 36o ° and returns to its original position, being of course the sack removed from the machine during the rotation of this device must be removed from this.

As soon as the filling opening is then folded in, the gripper claws 86 are brought to bear and, together with the guide 79, carry them the bag with the completed filling opening out of the machine.

It goes without saying that the device is for folding in the filling opening to be used alone or in conjunction with a bag machine, and you can also .The drive is carried out differently than described.

Claims (3)

PATENT CLAIMS: i. Device for folding in a filling opening into a single-walled or multi-walled one, preferably made of paper, with side gussets. provided sack closed at the top and bottom, characterized in that in addition to gripping devices (1i1) known per se for gripping the gusset of outside and spreading devices (I12), which engage in the side gusset, too Folding devices (113) are provided, which between the spread apart Fold the side walls Side walls are collapsed again by the spreading devices. 2. Device according to claim i, characterized in that the gripping device (111) and the Spreader '' tungen (iiz) by each 'one perpendicular to the' side fold Axis of rotation (114 or i29) and the folding device (finger 113) in one with the central plane the side fold coinciding plane are arranged to swing, and all three parts in a housing (iio) o. The like. Are stored on one side of the Auflagers-for the bag tube piece is attached. 3. Device according to claim i or 2, characterized by a reciprocating drive of the folding direction, the first the gripper devices when going through stops, drivers or the like lays down, then erects the spreading devices (11a) and finally the Folding device (1i3) for Einfälii the spread-open end of the bag is moved forward while it first folds up the spreading devices again when it falls and then only pulls the folding and gripping device out or back from the side gusset. q .. Device according to claim i, or 3, in which a bag tube intermittently around a double the sack length and then cut into two individual sack lengths is characterized. that the folding devices of a filling opening are arranged on opposite sides, so that each one filling opening on one One of the two bags can be folded in at the same time.