DD158889A5 - DEVICE FOR MOVING VALVE TAPES ON A FUEL SUPPORT - Google Patents

Abstract

The object is to provide a device for pushing Säcken on a Fuellstutzen where the valved Saecke be guided from a stack to a holding device by means of a Ventiloeffnungsvorrichtung which opens when introduced into the valve this, after which the holding device to the open valve engages and postpones this to the Fuellstutzen, which allows an automatic and safe operation with simple means. The object here is to achieve by appropriate design that the device, without the use of forces with significant component in the longitudinal direction of the valve, penetrate into the valve and spread it and thus can solve any adhesions. For this purpose, the valve opening device for opening the valve and for transporting the bag to the holding device is composed of several parts. These can be closed and opened in such a way that, when closed, they have the shape of a wedge with an oval cross section and in the open state the shape of a cylinder with the same cross section as a fully spread valve of the sack.

Description

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Device for sliding sacks on a filler neck

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The invention relates to a device for sliding sacks on a filler neck, where the bags provided with a valve are guided from a stack to a holding device by means of a valve opening device, which when inserted into the valve this opens, before the holding device engages around the open valve and put it on the filler neck. An application of the invention is particularly useful in automatic filling plants, where Säcka come with a valve used η. ₃

Characteristic of the known technical losgingen

Devices are known for pushing sacks on a filler neck, νιο the bags provided with a valve are led from a stack to a holding device by means of a valve opening device which opens upon introduction into da3 valve this, after which · the holding device engages around the open valve and this deferred on the filler neck. In such devices, the entire bag, including the valve, arrives at the filling machine at the same time. Sin automatic pushing the bag on the filler neck therefore requires a previous opening of the valve. This opening of the valve often requires a relatively large force on the

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Valve, since it is possible that excess glue from sticking of the bags makes the valve stick together * It is known from US-PS 3 423 903 to open the valve of the bag by means of a conical dome whose largest diameter corresponds approximately to the opening of the Ventiies wherein the mandrel is inserted into the valve and withdrawn while the bag is being fed to the filler neck by means of a holding device provided with suction cups *

However, the force required to push a partially bonded valve over a mandrel, or vice versa, is so great that the bag is slightly compressed and crumpled, thereby losing the suction of the suction cups. The use of suction cups for the transport of sacks is quite problematic, as is often the case with a very frizzy surface, which prevents the tight connection necessary for the function of the suction cups. »

It is also known Weihin the DS-AS 1 212 851, "the transport with suction cups or other devices that attack the sack or are inserted into the bag to circumvent it, that is ^s ack with the help of an" auxiliary nozzle ", which is also a conical mandrel has its tip, but designed as a kind of beak, a holding device is supplied, which engages around the actual valve opening.

In this device, the supply of empty bags is not automatic, they are instead pushed manually over the Hiifsstutzen. Only then does the automatic one by the auxiliary tube is mechanically fed along a rail of the mentioned holding device, which holds the bag, while the PIiIfsstutzen its movement

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continues and is thus pulled out of the valve _o Thereafter, the holding device leads the bag down and pushes it over the filler neck.

The automatic sliding of the sacks on the backs of the hosiery would require further devices, and here too, that the force _? It is necessary to open a partially bonded valve to counteract the delivery, because if the long tip also facilitates initial insertion, the valve must be pushed all the way over the thick part of the dome to be fully open become"

It is also known from the DS-OS 1 511 510, that the actual filler neck is designed as a "beak", can be opened and closed "Bin so executed filler is unsuitable for filling bags with side-mounted valves, and an automatic Sliding the sacks is made possible by the opening and closing mechanism of the beak. The aim of this construction is also to be able to use filling tubes with the greatest possible brightness. "Main application area; are bags with an outer ("tube-like") valve, which is pushed into the bag after filling and closed »

Object of the invention

The aim of the invention is it _? a device for sliding of bags on a filler neck, where the sacks provided with a valve are supplied from a stack of a holding device by means of a ^v ent !! opening device which when introduced in the alve ^ this opens, whereupon the

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Holding device around the open valve engages and this deferred to the filler to provide that allows automatic and safe operation with simple means »

Explanation of the essence of the invention

Bar invention is based on the object, a device for pushing sacks on a filler neck, where the bags are provided with a ~ ^v ~ entil led from a stack to a holding device, by means of a valve opening device, dis when introduced into the valve this opens, Before the holding device engages around the open valve and postpones this on the filler neck, to design such that they, without the application of forces with appreciable component in the longitudinal direction of the valve, penetrate into the valve and spread it and thus solve any possible adhesions.

According to the invention, this object is achieved in that the valve opening device is composed of several parts for opening the valve and for transporting the bag to the holding device; which can be closed and opened in the closed state, the valve-opening device is in the form of a wedge with an oval cross-section, the longitudinal axis of which is parallel to the edge of the sacks in the stack, but in the open state the shape of a cylinder with the same cross-section as a fully inflated valve of the bag has »

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Since in the Eegel only the inner valve parts are glued by excess glue, the introduction of a slender, wedge-shaped valve opening device in the valve causes no large forces acting sang on the sack lying, and the actual opening of the ^ valve is done by tensile forces transverse to the longitudinal axis of the valve the bags can therefore while the valve opening operation are held with very simple means, such, third with the help of grippers, you wia them from printing machines forth knows _β

Expediently, the valve-opening device consists of z.vjsi elongated parts, which have the form of cylindrical shells, both tapered at the front end and are stored in proportion to form a beak-shaped line with a rounded front edge in the closed state and in spread state are coaxial, so that they '- form each of a cylinder. In the set of jaws for the application of conical spikes, this results in a uniform spreading of the valve over the entire length.

The movement of the valve opening device is to be guided so that its underside is parallel to the underlay of the bags when it is inserted into the valve so that the lower part of the valve opening device slides on the resting side of the valve while the upper part is the unsupported part of the valve Valve raises «This results in a resistance-free insertion as possible and contributes to the ₅

Advantageously, the angle of the wedge, .der of the two elongated parts of the valve opening device

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is formed in the closed state, at the most 35 °, and the valve opening device is inserted from the loading mechanism out parallel to the bearing surface of the bags in the valve.

Bags that lie in bundles are not flat according to experience, but rather slightly cambered. This implies that the valve axis, especially the upper bags, not parallel but aur edition, but slightly increase from the mouthpiece to the center. is low. Suitably, therefore, the valve opening device is rotatably suspended as a whole behind a horizontal axis transversely to the longitudinal direction, so that it is rotatable upwards from a stop in a horizontal position or et ', so that it can adjust the longitudinal direction of the ^Y entiles accordingly.

In rare cases it happens that the valve the bag is completely glued. In this case, a manual or automatic sliding of the bag is possible, the bag must be sorted out. In order to avoid malfunctions of the automatic filling process, the valve opening device has a sensor for indicating whether it has been introduced into or past the valve of the bag, the sensor being in connection with a device for removing the bag, as far as the valve opening device slid past the valve of the bag.

Advantageously, the sensor is designed as a sin tilt contact, which is attached to the top of the valve opening device. and that way. that the front part terminates with the top of the valve opening device, so that

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A further feature of the invention is that cylinders are provided for a movement mechanism which, after insertion of the valve opening device into the valve and after spreading thereof, raises the same to a holding device having two bent gripping jaws which, when closed, enclose the valve and the valve opening device and hold the bag immediately under the valve while the valve opening device is withdrawn and returned to the home position.

As a result, the valve retains a circular cross-section and can be slid onto the filler neck from the holding device without difficulty and fixed in a known manner during the filling process, while the holding device is ready for feeding the next bag.

Advantageous: is that there is a table on which the sacks are piled up in stacks with the valves, and an arm controlled by a moving mechanism attached to the table under the valve opening device, with a finger sitting at the end of the arm which retracts and depresses the bag in front of the mouth of the valve.

Au3führungsbeispiel

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing show:

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Figure 1 is a side view of a portion of a sack pushing device incorporating the actual venting device;

Fig. 2: an enlarged illustration of the parts of the valve opening device; ^ ·

Fig. 3: the holding device which engages around the already spread valve of a bag;

Fig. 4: shows the front view of the device for pushing sacks onto a filler neck;

5J is a partial view according to Fig, 1 of the conveyor belt Όζ'Λ «of the table under the Vent ilöf fnungsvorricht,

A device for sliding sacks on the filling nozzles 4 of a filling machine 1 comprises a valve opening device 2 (Figures 1 and 5) and a holding device 3 (Figures 4) mounted on a chassis, not shown.

The opening device 2, as shown in Figures 1 and 2, consists of the elongated parts 5; 6, which are pointed at the front Snde ^, wherein the elongate member 5 is movably supported by the bearing 7 at its rear end. The two elongated parts 5; 6, which are in the form of half cylinder shells with one pointed end and the concave surfaces to each other, are in the initial position (drawn with solid lines) «

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V30, the tips 3nden of the two elongated parts 5 »6 collide jo that a wedge-shaped Sinführungsteil the Ventilöfinungsvorrichtung 2: is formed. The movable elongated member 5 can be moved by means of a hydraulic or pneumatic cylinder 8, which between the two elongated parts 5; 6 is mounted in a different position, as shown in Fig. 1 with dashed lines, in which the elongated parts 5> 6 are substantially parallel.

The elongated parts 5; 6 are fixed to the piston rod of a horizontal, hydraulic or pneumatic cylinder 9, by means of which they can be moved in a horizontal direction.

The entire above-described arrangement of the valve-opening measuring device 2, consisting of the two elongated parts 5 S and a horizontal cylinder 9 ₃ is arranged vertically and can be displaced by the vertical piston rod of a hydraulic or pneumatic cylinder 10,

The trained as an insertion part elongated parts of the valve opening device 2 are thus arranged both vertically and horizontally movable and can occupy the positions indicated in Figure _e , wherein the position of the two elongated parts 5; 6 is given to each other.

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The insertion of the valve opening device 2 into the valve and the spreading of the valve of a bag 11 take place in the following manner:

Bundles of sacks 11 are fed to the apparatus on the conveyor belt 12. The bags 11 are aligned, inter alia by means of a device 13 (Fig, 4), that the longitudinal directions of valve and Sinführungsteil the valve opening device 2 coincide, and so that the mouth of the valve voc the Sinführungsteil lies.

Sine holding device 33 with an arm 34 and a finger 35, viie shown in Fig. 5, now holds the device facing edge of the valve fixed, and the wedge-shaped insertion part of the valve opening device 2 viird introduced into the mouth of the '' 'entiles, so that the valve is opened slangs-. To make sure that this depression is possible for the last bags 11 in the stack. For example, the table on which the sacks 11 lie may have a countersink or, as shown, an elevation 36 made of porous material. Thereafter, the hydraulic or pneumatic cylinder 8 is extended, so that the movable elongate member 6 extends in a horizontal position and thereby spreads the valve, Sin subsequent extension of the cylinder 10 raises the splayed bag 11 to a certain height above the conveyor belt 12, In. this position, the holding device 3 attacks the valve in the following manner:

The holding device 3 (see FIGS. 3 and 4) consists of an arm 14, which is held on a carriage 15. The carriage 15 is able to become more in-line by means of rollers 16 and a pulling device (not shown)

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Sighting along a carrier 17 au move whose BNden are stored in bearings, not shown. The carrier 17 can thereby be rotated about its longitudinal axis by means of a hydraulic or pneumatic cylinder 18, one of which is fixed to the chassis and the other end is held by an arm on the carrier 17.

At the end of the arm 14 of the holding device 3 are rotatably mounted a pair of gripping claws 19? 20 attached, the surfaces of which in cross-position show each other and the same shape as the filler neck 4 and the Querschnittsfora, valve opening device 2 in the spread Sustand, which is approximately circular. The gripping claws 19; 20 are made of sheet metal, and; jäe gripping jaw 19; 20 consists, as shown in Fig. 3, of two equal parts, which are connected to each other with PIiIfe a cross member 21 and a connecting shaft 23. The connecting shaft 23 is rotatably mounted in the arm 14 so that the gripping jaw 19; 20 is rotatable

At each of the gripping claws 19; 20 is rotatably a pull rod 24; 25, whose free walls are united in a common joint on the piston rod of a hydraulic or pneumatic cylinder 26. The cylinder 26 is mounted in the arm 14 of the holding device 3 in its longitudinal direction and moves when pressure is applied to the tie rods 24; 25 _? wherein the Greifklaueniy; 20 are rotated, so that they occupy a closed, cross-position or an open position ,,

The holding device 3 is capable of a tilting movement upon pressurization of the hydraulic or pneumatic

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Cylinder 18, a translational movement along the carrier 17 by means of a pulling device, not shown, and a üreirbewegung with the gripping claws 19; 20 perform by means of the cylinder 26.

When a bag 11, as described above, arrived over the conveyor belt, spread and lifted (insertion device) is., The spread valve of the bag 27 (Figure 3) from the G-claw claws 19; 20 of the holding device 3, whereupon the valve opening device 2 is pulled out and the initial position shown in Fig. 1 einniniint., Then the holding device is rotated by pressurizing the cylinder 18, which rotates the carrier 17 in a tilted position, as shown in FIG , Dashed lines indicated,

In this position, the carriage 15 is moved along the carrier 17 with the help of the traction device, not shown, until the holding device is located at the level of the filler neck 4.

The filler 4 are mounted under the support 17 at such a distance, since the holding device 3 when turning back, which is now made, just pass over the filler neck 4 and the spread-open valve of the bag 27 can postpone.

A holding device consisting of a cylinder 28, on the piston rod a rubber stopper 29 is mounted, is now beat with Drucljibeaiif to clamp the bag 27 against the filler neck 4 firmly.

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The holding device can now return to its initial position by carrying out the movement described above, to take a new bag 27 and to lead this to the next filler neck 4.

After the bags 27 are pushed, the respective material flows out and fills the bags 27, which are supported by a roller 30 mounted below them.

When the bag 27 is filled, the holding device consisting of a cylinder 28 and a gum stopper 29 is released, and the sack 27 will fall due to the placement of the roller 30 and fall down onto a conveyor belt (not shown).

In the foregoing, a preferred embodiment of a device for pushing on sacks on a filler neck and its operation according to the principle of the invention has been described.

However, the principle of the invention includes many alternative embodiments.

It would be conceivable to mount the carrier 17 fixedly and to mount the arm 14 of the holding device 3 movably on a carriage or the like. "Other embodiments of the gripping claws 19; 20 and their movement devices are possible, as well as the valve opening device 2 can be executed with several moving parts words

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As can be seen in Figure 2, it may prove convenient to provide the elongated member 6 of the valve lifter device 2 with a shoe for reducing friction while providing the blade with greater mechanical resistance.

Claims (8)

? Q 7? Π Π ~ 15 ~ £. ^ '£ - w v 365 Β / 229 720/0 59 178/26 Experiences ans r h rue h 1. A device for pushing bags onto a filler neck, ^ o the bags provided with a valve are led from a stack to a holding device by means of a valve opening device which opens when it is inserted into the valve, after which the holding device engages around the open valve and this on the filler 'delays, characterized in that the valve opening device (2) for opening the valve and for transporting the bag (11) to the holding device (3) is composed of several parts that can be closed on the ^ iron and opened, that the valve-opening device (2) in the closed state in the form of a wedge with an oval cross-section whose longitudinal axis is parallel to the edge of the bags (11) in the stack, in the open state, however, the shape of a cylinder with the same cross-section as a fully spread valve the bag (11), 2. Device according to item 1, characterized in that the valve-opening device (2) consists of elongated parts (5; 6) in the form of cylindrical shells both tapered at the front end and supported relative to each other so as to have a rounded beak-shaped wedge when closed Form the leading edge and are coaxial in the expanded state, so that they 'form part of a cylinder. 22 97 2 0 0 - ¹⁵ - B 65 B / 229 720/0 59 178/26 Device according to point 2, characterized in that the angle of the wedge formed by the two elongated parts (5; 6) of the valve opening device (2) in the closed state is at most 35 °, and in that the valve opening device (2) of Movement mechanism is inserted parallel to the bearing surface of the bags (11) in the Yentil, 4 ·. Device according to one of the items 1 to 3 », characterized in that the valve opening device (2) is rotatably suspended as a whole at the rear about a horizontal axis (31) transversely to the longitudinal direction so as to be rotatable upwards by a stop in a horizontal position or slightly below it is. 5. Device according to one of the items 1 to 4, characterized in that the valve opening device (2) has a sensor (32) for indicating whether it is inserted into the valve of the bag (11) or slid vorbe¬ ^, wherein the Sensor (32) in conjunction with a device for removing the S _ac ices (11) is, as far as the valve opening device (2) on the valve of the bag (11) is passed, 6. Device according to point 5 »characterized in that the sensor. (32) is formed as a tilting contact, which is attached to the top of the valve opening device (2), in such a way that the front part with the top of the valve opening device (2) closes, so that the valve opening device freely into the valve of the bag ( i'i) can drive in « 297 -17- 14o8.1981 B 65 Β / 229 720/0 59 178/26 Device according to one of the items 1 to 6, characterized in that cylinders (9 »10) are provided for a movement mechanism which, after insertion of the valve opening device (2) into the valve and after spreading thereof, raises it to a holding device (3) which two curved gripping jaws (19; 20) which, when closed, the valve and slide valve opening device (2) enclose and ^s ack (11) to hold just under the valve. 8. The device according to item 1 to 7 _} characterized in that there is ain 'table on which the sacks (11) in stacks with the valves are upwards, and an arm (34) controlled by a at I'isch under Movement mechanism attached to the valve opening device (2), wherein at the end of the arm (34) a finger (35) sits, which is retracted and presses down sack (11) in front of the mouth of the valve. For this purpose, see drawings