JP2778982B2 - Device for filling and closing bags - Google Patents

Description

The present invention relates to an apparatus according to the preamble of claim 1.

[Conventional technology]

In known packaging equipment machines for producing bag packs filled with bulk or powdered articles, the filling is filled into the bag in several portions and the filling is then tightened in the bag by vibration. The bag is hardened and finally the mouth of the bag is closed by folding or fitting. In high-power packaging machines, these operations are performed over a plurality of stations of the conveyor. For the operator, in order to have better visibility and easy access to each working device, the transport device for the bags is formed as a long-distance vehicle accessible from one side.

It takes a longer time for powdered fillings, such as flour, powdered sugar or the like, to be fully compacted in the bag than for other fillings. Accordingly, a plurality of additional stations must be provided on the transport device, which significantly increases the overall length of the device. In order to avoid such a structure, conventionally, the transport device itself is formed in an oval shape circulating in one horizontal plane, and a processing device for bags is provided in both straight sections and partially in the deflection section. Are located. The disadvantage of such an arrangement, however, is that the machine must be operated from two opposite sides. It is therefore desirable to develop a bag filling and closing device that has a long compaction section and yet has a clear and accessible structure.

[Advantages of the present invention]

An advantage of the bag filling and closing device according to the present invention is that the line of sight and the processing device have good operability despite the relatively long compaction section. Since the pitch circle diameter of the transfer wheel is significantly smaller than the pitch of the transfer device, a compact structure having a large number of working stations is possible. According to the configuration of claim 2, a particularly long compaction section is obtained.

〔Example〕

Transport device for bags formed as a long-distance vehicle
11 has, for example, three filling devices 12, 13 and 14 opposed to each other in the inlet area, a compacting device 15 in the central area, followed by a control scale 16, a refilling device 17 and a closing device 18.
Are opposed. The conveying device 11 comprises an endless conveyor chain 20 circulating in a vertical plane, the conveyor chain having an upper horizontal straight section. Outwardly projecting entrainers 21, 22 are fixed to the conveyor chain 20, and the entrainers are arranged at regular intervals in pairs so as to grip the bag 1 and extend its width. When the followers 21 and 22 intermittently advance, each pair of followers guides the bag 1 to the stations A to Z sequentially located along the transport device 11. The bladder 1 is guided laterally by stationary guide walls 23, 24 and is supported by a bottom rail 25.

The bag 1 is inserted between the pair of entrainers 21, 22 at the station A at each stop of the transport device 11. In stations C, E, and G, the filling devices 12, 13, and 14 sequentially fill a part of the target amount of the filling material into the bag.

In order to compact the filling in the bag 1,
The filling is removed from the transport device 11 in the compaction area of the device and then returned again. For this purpose, a transport wheel 30 which rotates intermittently in a horizontal plane is arranged above the six stations J to O.
30 is provided with a pair of entraining walls 31, 32 projecting downward. The distance between the pair of entrainment walls 31 and 32 corresponds to the thickness of one bag and the distance between the guide walls 23 and 24, and therefore the bag 1 which has entered the station J and the station O is transported by the transport device. It reaches between the pair of entrainment walls 31 and 32 of the transfer wheel 30 which stops during the transfer process 11. During the subsequent transfer process of the transfer wheel 30, the transfer device 11 stops and the transfer wheel
30 entrainment walls 31, 32 each guide one bag 1 from the station J and the station O between the semicircular guide walls 33, 34; 35, 36 which restrict the circulation of the entrainment walls 31, 32; It is brought on suitably curved oscillating rails 37, 38 provided on one or the other side of the transport device 11. After passing through the semicircular circulation section, the bag 1 is returned to the transport device 11 again. In that case, bag 1 received at station J is station O
From this, the bags 1 received at the station O are returned from the station J to the transport device 11 and these stations J or O are emptied in the next transport step of the transport wheel 30. While passing through the semicircular circulation section of the transport wheel 30, substantially vertical vibrations or impacts are transmitted to the bag 1 by vibrating rails 37, 38 supporting the filled bag 1. Thereby, the filling in the bag sinks. In order to be able to supply the bags 1 on both sides of the transport device 11 to both semicircular circulation sections of the transport wheel 30, the pitch circle diameter of the transport wheel 30 is an odd multiple of the pitch of the transport device 11 and the transport wheel 30 The device 11 rotates one pitch after each two transport steps. With this arrangement, at station J, every other bag that travels is received, with the bags in between passing from station J to O and from station O being received by transport wheel 30 as well.

After the packing is compacted and the bag is re-inserted into the transport device 11, the weight is weighed by the control weigher 16 at the station Q. If the weight does not reach the reference weight, the weight is weighed by the next station R to the refilling device 17 at the next station R. The shortage is then filled into the bag. If the filling devices 12 to 14 have already been filled with the correct reference weight, the control scale 16 and the refilling device 17 can be omitted.

From station T to station X, the mouth of the bag is folded by a closure device 18, glued and closed. The finished bag pack is extruded from station 11 at station Z.

In the illustrated embodiment of the bag filling and closing device, some stations along the transport device are shown open.
These stations can be provided with additional devices for processing bags, such as printing devices, labeling devices and the like. Since the device for processing the bags has a predetermined size or width, the transport device has the pitches of the entrainers 21 and 22 adapted to these conditions. The bottom rail, which is vibrated for compaction of the filling, can extend over a plurality of stations of the conveyor. Since the pitch of the entraining walls 31, 32 of the transport wheel 30 is smaller than the pitch of the transport device 11, a relatively small space can be provided with a number of stations for compacting the contents in the bag. .

[Brief description of the drawings]

FIG. 1 is a schematic side view of one embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along the line II-II of FIG. 3, and FIG.
It is sectional drawing which followed the II line. 1 ... bag, 11 ... conveying device, 12,13,14 ... filling device,
15 ... compacting device, 16 ... control weigher, 17 ... refilling device, 18 ... closing device, 20 ... conveyor chain, 21,2
2 ... entrainer, 23, 24 ... guide wall, 25 ... bottom rail, 30
…… Transport wheels, 31,32 …… Training walls, 33,34,35,36 ……
Guide walls, 37, 38 ... Vibrating rails.

Claims (3)

(57) [Claims] An apparatus for filling and closing a bag (1), said apparatus intermittently conveying a bag in a linear conveying section by a pair of entrainers (21,22); Stations (CG) for filling the bags (1), of the type comprising devices for processing the supplied bags, arranged at stations (AZ) along the transport device.
And a plurality of stations (J to O) of the transport device (11) between the station (P to X) for closing the bag (1).
A transport wheel (30) extending over the surface and intermittently rotating in a horizontal plane, the transport wheel being provided with a downwardly projecting entrainment wall (31, 32), which entrains the entrainment wall during circulation. The two stations (J and O) intersect with the transport section of the transporter (21, 22) of the transport device (11), and the transport walls (31, 32) of the transport wheel (30) Device for filling and closing bags, characterized in that the circulation section is opposed to devices (37, 38) for compaction of the articles filled in the bag. 2. The transfer device according to claim 1, wherein the pitch circle diameter of the transfer wheel is an odd multiple of the pitch of the transfer device, and
2. The device according to claim 1, wherein the drive of the transport wheel is coordinated with the drive of the transport device so that the transport wheel performs one transport step for each of the two transport steps. 3. The device (15) for compaction of the filling in the bag (1) has a semicircular oscillating rail (37, 38), each oscillating rail being a transport wheel (30). 3. The apparatus according to claim 1, wherein the bottom of the conveying path of the bag is formed in the region of the first embodiment.