CN106660295A - Device and method for forming a bottom opening on a bag body - Google Patents

Abstract

The invention relates to a device and a method for forming a bottom opening (8) between bag sections (2', 2'') at the open end region (9) of a tubular bag body (2), comprising a transport device (3) for transporting the bag body (2) in a transport direction (5) transversely to its longitudinal extension (6), and an opening device (7) for forming the bottom opening (8) between the bag sections (2', 2'') at the open end region (9) of the tubular bag body (2). According to the invention, the opening device (7) comprises at least two spreading elements (10) in the form of wedge elements (12; 12', 12'', 12'''), which are successively arranged in the direction of transport (5) of the tubular bag body (2) and which are provided with edge surfaces (14; 14', 14'') rising counter to the rotational direction (13), by which the bag sections (2', 2'') can be spread apart at the open end region (9) of the tubular bag body (2) during the transport thereof on the transport device (3), wherein the wedge elements (12; 12', 12'', 12''') of successive spreading elements (10) have different wedge heights (h), which increase in the direction of transport (5) of the tubular bag body (2), preferably perpendicular to the support surface (4) for the tubular bag body (2) on the transport device (3).

Description

For constituting the apparatus and method of the bottom opening of bag

The present invention relates to constitute bottom opening between the bag section on a kind of open end region of the bag in tubulose Equipment, the equipment belt has the conveying device for conveying bag transverse to the conveying direction of the Longitudinal extending of bag, and And the equipment is also carried for constituting opening for bottom opening between the bag section on the open end region of the bag of tubulose Mouth device, wherein, the shedding motion has at least one around the rotatable expansion member of rotation axis, the expansion member energy Between bag section on the open end region of enough bags for importing tubulose when rotated.

Moreover, it relates to constitute between a kind of bag section on the open end region of the bag of tubulose The method of bottom opening, wherein, the bag is conveyed transverse to the conveying direction of its Longitudinal extending, and in rotary course In, the expansion member rotated around rotation axis is imported between the bag section on the open end region of the bag of tubulose.

In the prior art, the equipment for manufacturing sack is just become known for for a long time.The equipment is included to tubes of material Prepare, or the tubes of material is obtained by forming tubular material width, or being bonded with each other by the long side of flat material roll Obtain into tubulose final structure, the equipment include by tubes of material cut into suitable length tubulose bag and by pipe The appropriate opening of the open end of the bag of shape, fold and close and form bag bottom.In order to open a bag bottom, in existing skill Different solutions are suggested in art.

It is a kind of for strutting the equipment for intersecting bottom on paper tube by known to the C of DE 640 287, wherein, the two of pipe section Individual tubular layer is separated from each other by pin is separated.In being processed further of tubulose paper, enter between two tubular layers and expand Exhibition disk, its shell is from top to expanding to increasingly wider wedge shape.Therefore, extend disk and increasingly go deep into paper deeply when rotated Two integuments of pipe, therefore paper tube bottom equably mutually extended.

But, this known design has the disadvantage in that, the extension of tubular body end is with relatively small number of path steep Realize on high and steep lozenges.Therefore, mistake can be produced.

In addition, DE 1 611 701 also disclose it is a kind of in bottom machine is manufactured manufacture bag and screen cloth friendship The equipment that axial transport, the tubular slug that plane is arranged end is opened during fork bottom.Bottom is being manufactured for continuous work In the design variations scheme of machinery, tubular sections are directed on lateral attitude by circular clamp chain on different stations Through.In order to open tubular base, the wind chamber pair of position fixation is provided with, it has rows of inlet hole.The wind chamber passes through Pipeline is connected with vavuum pump.Wind chamber along transmission direction, only dispersedly arrange by poor several millimeters of ground.Known design is not Can so set and be adapted to, can realize extending the importing of disk or similar device between tubular layer.Relatively, in prior art In, on the one hand supporting disk has air-blast atomizer, and its air-flow points to the air gap between two film layers.On the other hand, Two other, contrary operating wind chambers pair are needed, is extracted out using them and is laid and intersect bottom.

A kind of bottom former for hard base plate bag machine, is provided with sickle shaped by known to document DE 912 045 Bottom shaping mechanism, the bottom shaping mechanism can be towards the pipe end movement of pre- opening.Falculate bottom shaping mechanism around Rotary shaft is run, and the rotary shaft is movably placed on a lever arm of the double lever of rotatable supporting.The lever Arm is controlled by setting articulate connecting rod and double lever on its end with the roller of eccentric part.By bottom shaping mechanism Rotary shaft around fulcrum swing, bottom shaping mechanism in addition to the shuttling movement produced by gearing also implement pendulum It is dynamic.

Unfortunately the embodiment is unstable, because falculate bottom shaping mechanism can not guarantee all the time Sufficient bottom-open.Therefore malfunction occurs in the prior art, the malfunction can cause operation troubles.This Outward, the supporting of bottom shaping mechanism is comparatively complicated.

Additionally, in the prior art also using the bottom with the rotary type expansion instrument for being equipped with upper-part and lower part Opening station, the upper-part and lower part is in cyclic motion process by frame for movement from operation.Unfortunately, The expansion tool complex structure and easy failure of this multi-piece type.In addition it is necessary to comprehensively be arranged to this expansion tool.

The equipment of the other kinds of opening for bottom of the tube is for example by the document WO 2012/049040 or B of AT406 755 It is known.

Corresponding thereto, the technical problem to be solved is, there is provided a kind of to be used to constitute bottom as above The equipment of opening, the equipment overcomes or reduces drawback of the prior art.On the one hand accordingly, the purpose of the present invention is, with High accuracy and reliability form bottom opening or bottom-open in continuous running, wherein, for the knot of the equipment Structure is as low as possible into being kept as.Additionally, should also reduce maintenance cost.Additionally, should also realize high production speed.

The technical problem is solved by equipment according to claim 1 and method according to claim 19.Preferably Embodiment is given in the dependent claims.

According to the present invention, rotatable expansion member has wedge, and the wedge has at least one in face of rotation side The lozenges for ramping up, the bag section on unlimited end regions of bag of tubulose can be made using the lozenges in bag Mutually liftoff expansion in body course of conveying on a conveyor, so as in the bag on unlimited end regions of the bag of tubulose Bottom opening is constituted between section.

Therefore in order to open bag bottom, in this embodiment using the expansion member of wedge shape, the wedge of the expansion member Shape face rises in face of bag direction of rotation on a conveyor namely from front end region to the direction in rearward end region. When the bag of tubulose is carried through shedding motion, the wedge element of rotation put in the bag of tubulose on unlimited end regions Between the bag section placed before and after successively, wherein, bag section is extruded ground mutually by the lozenges for rising backward of wedge element Expansion.By the A/F of the bottom opening of the bag of wedge element continuous enlargement tubulose.Advantageously, therefore bottom opening can be with Particularly securely it is molded on the unlimited end regions of the bag of tubulose.Thus, it is possible to significantly improve the durable of shedding motion Degree.When the bag section on the unlimited end regions of the bag in tubulose is carried through shedding motion in horizontal level, wedge Element preferably has causes rotary shaft that is vertical namely extending perpendicular to bag bearing-surface on a conveyor.In the reality In applying mode, the lozenges of rising is angularly arranged with the transporting flat of horizontal plane, wherein, lozenges is according to embodiment It is different and be inclined upwardly to rearward end from leading section or dip down and tiltedly extend.Alternately, tubulose bag open wide End regions on bag section can also for example with the bearing-surface on transporting flat into such as 90 ° ground bending.In the enforcement In mode, wedge element can rotatably be arranged around the rotary shaft of level.In the case, the lozenges of wedge element is in horizontal plane In in face of direction of rotation rise arrange.The shuttling movement of wedge element is so mutually coordinated with the transporting velocity along conveying device, from And constitute bottom opening on the unlimited end regions of the bag of tubulose.According to the difference of embodiment, can be in tubulose Bag at least one, all constitute (bottom) opening on outstanding two unlimited end regions.For this purpose, the equipment can To have at least one wedge element respectively on both sides, to constitute the opening of bottom opening or top side.Reality of the invention The mode of applying is characterised by relatively low structural cost, wherein it is possible to save the machinery for ejecting multi-piece type expansion tool Structure.Additionally, rotationally supporting for expansion tool is extremely simple.It is also advantageous that, the expansion member of wedge shape is in running Reliably played a role with high production speed.Maintenance cost can be kept as in a cost-effective manner relatively low.

In order that the bottom opening on the unlimited end regions of the bag of tubulose is constituted with required A/F, opening Device has at least two expansion members being sequentially placed before and after the conveying direction of the bag of tubulose.Preferably, along tubulose Wedge element of the conveying direction observation of bag positioned at front is configured to form the first narrower A/F of bottom opening, and And the bottom on the open end region that the conveying direction wedge element that is located behind of observation is configured to form the bag of tubulose The second wider A/F of opening.

For this purpose, the wedge element of the expansion member being sequentially placed in front and back has the defeated of bag different, along tubulose Send direction ever-increasing wedge shape height, the supporting on a conveyor of the highly preferred bag perpendicular to tubulose of the wedge shape Face.Accordingly, the maximum elongation of bearing-surface of the wedge shape height namely wedge element of wedge element perpendicular to bag on a conveyor It is continuously increased with connecing a wedge element along conveying direction observation, from a wedge element.Thus in an advantageous manner by structure letter Single measure hierarchically constitutes bottom opening.

According to a kind of particularly preferred embodiment, at least one expansion member, preferably each expansion member have to be used In the adjusting apparatus of the wedge shape height of adjustment expansion member.In this embodiment, wedge shape height is adjustable.Advantageously, Can so have to apply and pointedly take adjustment.Adjusting apparatus can for example have the longitudinal direction guiding extended along short transverse Portion, it is used for relative two sections for adjusting expansion member part in other words.Lock piece additionally can be set, and it is used to expand In other words part is relative is locked in the relative position for setting for the section of element.

In order that the bag section expansion mutually liftoff in opposite direction on unlimited end regions of bag, it is advantageous to Wedge element have two along conveying direction from the lozenges, preferred upper wedge face and lower wedge face for running, wherein, top The bearing-surface of lozenges and lower wedge face preferably respectively with the bag of tubulose on a conveyor is arranged at an acute anglely.Thus it is excellent Selection of land, in shedding motion, the upper pouch section of the bag of tubulose faces upwards extruding by the upper wedge of wedge element, wherein, Lower pouch section faces down extruding by the lower wedge of wedge element.It is possible thereby to particularly securely constitute on the bag of tubulose Bottom opening.Preferably, upper wedge face and lower wedge face are symmetrical with regard to the bag bearing-surface on a conveyor of tubulose Ground arrangement.It is possible thereby to make the median surface that bearing-surface of the bag section of the bag of tubulose on by conveying device is constituted equably Extruding is to constitute the bottom opening on unlimited end regions of the bag of tubulose.

In order to realize the continuously shaped of the bottom opening on the bag of tubulose, it is advantageous to which expansion member has in rotation The wedge element mutually overlapped along the conveying direction of the bag of tubulose when turning, wherein, the wedge element for being located at front along conveying direction has There is the recessed sky for making to be passed through along the wedge element that conveying direction is located behind.In this embodiment, wedge element is in shuttling movement When temporary transient overlap joint ground arrangement, wherein, the front end region of the wedge element being located behind along conveying direction is passed through along conveying direction position In the recessed sky of the wedge element in front.Advantageously, therefore, along conveying direction be located at front wedge element move from the bag of tubulose Before going out, the wedge element being located behind along conveying direction has just been stretched between the bag section of the bag of tubulose.Advantageously, exist Malfunction, especially blocking of the bag in shedding motion are reliably avoid in the embodiment.

In order to open the bottom section of traditional bag, it is considered as particularly advantageously, arranging lucky three expansion members, The expansion member is with bag overlapping along conveying direction when rotated, for stretching into tubulose in unlimited end regions On bag section between wedge element.The embodiment realizes the lasting shaping of bottom opening, wherein, largely avoid Malfunction.

According to a kind of particularly preferred embodiment, wedge element is solid based on having on the end regions rearward of direction of rotation Section is held, for importing the forward region of the bag of tubulose when the lozenges of wedge element that is subsequent along conveying direction or being located behind The region based on conveying direction rearward of the bag of tubulose is held when in domain.Advantageously, the bag of tubulose can so be made Body is held in the state of partially open by means of wedge element, at the same time, along the subsequent wedge element of conveying direction in order to expand Wide bottom opening and in the open end region of the bag that puts in tubulose.

In this embodiment advantageously, the fixing section of wedge element has guiding arris, the guiding arris arrangement With lozenges in the rearward end substantially the same height that direction of rotation is observed.The height here is with guiding arris relative to pipe The spacing of the bag of shape bearing-surface on a conveyor is related.When the bottom section of the bag of subsequent wedge element insertion tubulose When middle, the open end region under partially open mode of the bag of tubulose is carried out by the guiding arris of wedge element solid Hold, so that the A/F of bottom opening is hierarchically increased.

On the one hand in order to the overlap joint of the expansion member placed before and after realizing successively is arranged and on the other hand in order to protect Hold the temporary transient partially open state of the bag of tubulose, it is advantageous to which wedge element has between lozenges and fixing section to be used In the recessed sky for making to be passed through along the subsequent wedge element of conveying direction.Accordingly, the wedge element is in (along direction of rotation observation) front end In portion have lozenges and in rearward end have fixing section, wherein, lozenges and fixing section between be provided with for Allow the recessed sky of wedge element rotary motion being located behind.Therefore wedge element also arranges by the recessed empty local overlap joint, from And avoid the partially open end regions of the bag of tubulose from closing up again.

In order to simplify importing in unlimited end regions of the wedge element in the bag of tubulose, it is advantageous to wedge element Arcuately, especially bend to arc-shaped along direction of rotation.Accordingly, bag of the wedge element based on tubulose supporting on a conveyor Face is arcuately constituted.It is possible thereby to particularly securely contoured bottom opening.

In order to promote expansion member to be rotated, it is advantageous to wedge element with and drive its coupling shaft element phase Even, the rotation axis of the shaft element is arranged with being preferably substantially perpendicular to bag bearing-surface on a conveyor.Accordingly, wedge unit Part preferably has the rotation axis of perpendicular namely is substantially perpendicular to the rotary shaft of the bearing-surface arrangement of conveying device Line.

In terms of simple structure, steady implementation advantageously, wedge element has at least one to be preferably substantially perpendicular to bag The plate of body bearing-surface arrangement on a conveyor, shown plate constitutes lozenges on side.Accordingly, lozenges preferably exists Constitute on the top edge or lower limb of the plate erect with the bearing-surface perpendicular in conveying device.

For manufacturing technology reasons, preferably specify, wedge element has at least one to be preferably about parallel to bag The diskware of bearing-surface arrangement on a conveyor, the diskware is connected in outer edge region with the plate with lozenges.

In order to make expansion member get into the open end region of the bag of tubulose, it is advantageous to which shedding motion exists There is pre- opening station on conveying directionCan be by the bag of tubulose using the pre- opening station Bag section on the open end region of body is changed into spaced state from the state of the mutual placement that reclines up and down in planar ground. On pre- opening station, bottom opening is opened to a certain extent, so that the narrow end portion of wedge element can simply stretch into tubulose Bag open end region on bag section between.

According to a kind of particularly preferred embodiment, pre- opening station has at least one guide element, the guiding unit Guiding face of the part with the bag section relative to conveying direction on the open end region of inclined, bag for tubulose, its In, the guiding face is connected with the suction element being used for by the suction of bag section on guiding face.When through pre- opening station, tubulose Bag open end region on bag section conveyed along the guiding face of guide element, wherein, bag section by suction unit Part keeps contacting with guiding face.Due to being in tilted layout for guiding face, this bag of section along pre- opening station when conveying relative to another One bag section is away from so that the bag section on the open end region of the bag of tubulose mutually reclines up and down from planar ground The state of placement is changed into the state of spaced bottom opening partly open.

In order to realize bag from direct transfer of the station at least one expansion member of pre- opening, it is advantageous to pre- At least one guide element of opening station is observed along conveying direction and arranged with least one expansion member overlap joint.Accordingly, one Denier bag section opens up into substantially maximum open width in pre- opening station, and wedge element is inserted between the bag section of bag. It is therefore advantageous that can realize constituting the continuous transition between bottom opening in pre- opening station and using expansion member.It is excellent It is selected between pre- opening station and the expansion member with inclined guiding face and is not provided with other shedding motions.

In order to discharge bottom opening when the bag of tubulose is transported, it is advantageous to be provided with for driving with guiding face The driving element of guide element.When guide element is moved, bag section is retained on guiding face by suction element.

In this embodiment advantageously, guide element has the guide strips, especially for no reason being connected with driving element Scalp band, constitutes the guiding face of the bag section on the open end region of the bag for tubulose on the guide strips.According to This, when the bag of tubulose is conveyed by pre- opening station, pump orifice is preferably as guide strips are guided together.In the enforcement At least one driven roller is set used as driving element, guide strips run in the driven roller in mode.It is preferably set up two Individual driven roller, the Endless belt of the guiding face with the bag for tubulose winds around the driven roller.

In order to evenly or uniformly manufacture bottom opening on the open end region of the bag of tubulose, it is advantageous to Pre- opening station has two guide elements, and the guide element is carried along conveying direction from bag running, for tubulose The guiding face of the bag section on the open end region of body.In a preferred embodiment, the guide element on top is provided with Along the top guiding face that conveying direction rises upwards, and the guide element of bottom is provided with the bottom declined downwards along conveying direction Guiding face.In a kind of alternative embodiment, the bag of tubulose vertically bends in open end region with transporting flat. In this embodiment, in advance the guide element of opening station is flatly arranged, wherein, the spacing between guiding face is in conveying direction Upper constantly increase.

In order that bag section is retained on guiding face when pre- opening station is carried through, it is advantageous to which suction element has Have at least one to be arranged on the pump orifice for suction bag section on guiding face.The pump orifice and negative pressure shaper part phase Even, the negative pressure shaper part inhales related bag section on guiding face.

According to a kind of particularly preferred embodiment, just what a pump orifice is arranged on guiding face.Preferably In, bag section is retained on corresponding guiding face when pre- opening station is carried through by only one pump orifice.With it is existing There is the SS sequence with multiple rules used in technology (to be only capable of realizing using the SS sequence relatively small Opening angle) suction belt compare, the embodiment is unexpectedly proved to be more favourable.This office of prior art The reason for limit is that the pump orifice of successive can cause to form stress in bag when bag is opened with smaller angle, and The stress can then be such that bag releases from guiding face.For this reason, in the prior art along conveying direction in suction belt The suction box pair of another pre- shedding motion, especially pressure air nozzle and inverted running can be also set afterwards, to realize bag The folding of bottom.Correspondingly thereto, the arrangement of only one pump orifice can be such that bag is inhaled by point-like to lead on guiding face Draw on face.Thus, guiding face can have compared with transporting flat with respect to bigger inclination angle, prolong without the master along bag section Stretch to form stress.Advantageously, bag is thus made reliably to be retained on guiding face.Attracted by the point-like to bag section, the bag Section can be on the one hand linearly on the other hand mounted along curve.According to the difference of application scenario, can be near guiding face Vacuum chamber is correspondingly set.

Further preferably specify, the Endless belt for constituting guide element has lucky two pump orifices.In the embodiment party In formula, Endless belt is set used as guide element, the Endless belt is provided with lucky two pump orifices.Two pump orifices it Between spacing be preferably roughly equivalent to the half (namely half of girth) of Endless Belt Length.If be carried through in bag This pump orifice is arranged on guiding face during pre- opening station, then another pump orifice then in Endless belt and bag On opposite side.Thus this pump orifice works, and another pump orifice is inoperative.For Endless For belt runs at short notice, two pump orifices can all be inoperative.Especially when two pump orifices are in drive Even more so when in the region of dynamic roller, the driven roller drives Endless belt.

A kind of embodiment is particularly preferred, wherein, there is pre- opening station at least one negative pressure to form unit, described Negative pressure forms unit and carries the vacuum chamber adjacent with the guiding face of the guide element for being equipped with pump orifice.The preferred cloth of vacuum chamber In putting the housing inside guide element, the guide element preferably has Endless belt.The vacuum chamber on this one side It is connected with negative pressure shaper part by aspiration.Endless belt is directed through vacuum chamber, the nothing on another side Headpiece belt has pump orifice.Thus the bag section for making correlation is placed on the guide element of Endless belt.

Additionally, the technical problem to be solved is also solved by the method for the above-mentioned type, wherein, rotatable expansion Open element and there is the wedge element with least one lozenges risen in face of direction of rotation, using the lozenges pipe can be made The mutually liftoff expansion in bag course of conveying on a conveyor of bag section on the open end region of the bag of shape, so as to Bottom opening is constituted between bag section on the open end region of the bag of tubulose.

The present invention is expanded on further below by preferred embodiment, but the embodiment should not constitute limit to the present invention System.In the accompanying drawings：

Fig. 1 a schematically show the schematic diagram for manufacturing the equipment of sack, which provided of the invention for beating Open the shedding motion of the bottom section of bag；

Fig. 1 b schematically show the part of the pre- opening station of the equipment according to Fig. 1 a；

Fig. 2 to Fig. 7 illustrates the part of the shedding motion according to Fig. 1 a when constituting bag opening by wedge-type expansion member View, the mutually liftoff expansion of bag section that the expansion member is sequentially placed before and after making on the open end region of the bag of tubulose.

Fig. 1 a illustrate the part for manufacturing the equipment 1 of sack, wherein, material roll, especially by made by textile material Material roll is processed to hard base plate bag or hard base plate bag valve in multiple different stations.The equipment 1 has (not shown ) cutter sweep or separator, for material roll to be cut into the bag 2 of tubulose.The bag 2 of the tubulose is mutual by two The bag section 2 ', 2 placed up and down " composition, wherein, each bag of section 2 ', 2 " can be made up of the layer of multiple different materials.Pipe The bag 2 of shape is transferred in conveying device 3.In conveying device 3, substantially water of the successive of bag 2 ground in conveying device 3 Prolonged transverse to its longitudinal direction for schematically showing in fig. 2 along conveying direction 5 with the recline state of placement of planar on flat bearing-surface 4 Stretch axis 6 to be conveyed.

As Fig. 1 a, be further illustrated referring also to Fig. 2 to Fig. 6, conveying device 3 is connected with shedding motion 7, the shedding motion For the bag section 2 ', 2 on the open end region 9 of the bag 2 of tubulose " between constitute bottom opening 8.Shedding motion 7 has There is pre- opening station 23, using the pre- opening station by bag section 2 ', 2 on the open end region 8 of the bag 9 of tubulose " Spaced state can be changed into from the recline up and down state of placement of planar ground.

As shown in Figure 1a, pre- opening station 23 has with the upper of the top guiding face 24 ' ramped up along conveying direction 5 Portion's guide element 24 simultaneously has the bottom guide element 25 with the bottom guiding face 25 ' declined downwards along conveying direction 5.Institute Show and arrange in embodiment Endless belt as guide element 24,25, the guide element driven rolls 24 ", 24 " ' drive. Guide element 24,25 respectively with for holding corresponding bag section 2 ', 2 " suction element 26 be connected.The phase of the suction element 26 Answer ground that there is at least one pump orifice 26 ' on the guiding face 24 ', 25 ' of Endless belt.In this embodiment, each Endless belt all has lucky two pump orifices 26 ' (reference picture 1b).

As shown in Figure 1 b, there is respectively pre- opening station 23 negative pressure for each guide element 24,25 to form unit 27. Negative pressure forms unit 27 and has vacuum chamber 27 ', the vacuum chamber and top guide element 24 or bottom guide element respectively 25 guiding face 24 ', 25 ' adjacently extends.Vacuum chamber 27 ' is arranged on housing 27 " in, the housing is arranged in guide element 24th, 25 inside.In order to apply negative pressure on the pump orifice 26 ' of guide element 24,25, vacuum chamber 27 ' passes through aspiration 27 " ' be connected with (unshowned) negative pressure shaper part, such as vavuum pump.When the bag 2 of tubulose is directed through pre- opening station 23 When, bag section 2 ', 2 " is abutted in along conveying direction 5 on the guiding face 24 ', 25 ' of operation.Thus, bag section 2 ', 2 " are continuous Ground is changed into spaced, partly open bottom from the recline up and down state of placement of the input end planar ground of pre- opening station 23 The state of portion's opening 8.

As Fig. 1 a are further illustrated, shedding motion 7 has the multiple expansions being located at along conveying direction 5 after pre- opening station 23 Element 10 is opened, the expansion member is rotatably supported rotating around vertical rotation axis 11.It is abundant by pre- opening station 23 The bottom opening 8 of the bag 2 of tubulose is opened, so that expansion member 10 can get into the open end region 9 of the bag 2 of tubulose On bag section 2 ', 2 " between.Expansion member 10 puts on the open end region 9 of the bag 2 of tubulose in rotary motion Bag section 2 ', 2 " between, wherein, constitute bottom opening 8.

As Fig. 1 a are further illustrated, shedding motion 7 has bottom fold station 28 along conveying direction 5, in bottom folding State of the geometry of opening in the rectangle of specification is made in folded station by pin element 29.Since then, the bag 2 of tubulose is with this Mode known to body is processed into and prepares the sack for completing.

The expansion member 10 in different phase when bottom opening 8 is constructed is shown in Fig. 2 to Fig. 7.The bag 2 of tubulose Here can in a horizontal plane with planar ground recline up and down placement state (as shown in Fig. 3 to Fig. 7) be pumped through opening Device 7.Alternately, bottom section can also be bent (as illustrated schematically in fig. 2) when conveying is by shedding motion 7.

According to Fig. 2,3, just the bag 2 of the tubulose of the bottom opening 8 with fractional open convey from pre- opening station 23 To expansion member 10.According to Fig. 3 to Fig. 7, the A/F of bottom opening 8 hierarchically increases, so that bottom opening 8 is in expansion Open completely after element 10.

As shown in Figures 2 to 7, the expansion member 10 for rotatably supporting has respectively wedge element 12, in the wedge element On be configured with face of direction of rotation 13 namely from front end region rear end portion region rise lozenges 14.In the bag of tubulose When body 2 is conveyed in conveying device 3, wedge element 12 is forced on the open end region 9 of the bag 2 of tubulose using lozenges 14 Mutually opposing bag section 2 ', 2 " is constantly located remotely from each other, thus tubulose bag 2 the Shang Dai areas of open end region 9 Bottom opening 8 is formed between section 2 ', 2 ".Each wedge element 12 have for upper pouch section 2 ' upper wedge face 14 ' and For lower pouch section 2 " lower wedge face 14 ".The lozenges 14 ' of wedge element 12,14 " respectively with the bag 2 of tubulose defeated The bearing-surface 4 for sending the level on device 3 is arranged at an acute anglely.

Be further illustrated such as Fig. 2 to Fig. 7, wedge element 12 with substantially perpendicularly namely with bag 2 in conveying device 3 The vertically arranged shaft element 15 of bearing-surface 4 be connected, (unshowned) driver orders about the shaft element and is rotated. In the illustrated embodiment, lozenges 14 is formed on the panel element 16 of perpendicular setting.It is located at along the observation of conveying direction 5 The wedge element 12 ' in front has only one panel element 16.Middle wedge element 12 is located at along the observation of conveying direction 5 " and along defeated Send the wedge element 12 that observation is located behind of direction 5 " ' there is respectively upper plate member 16 ' and lower plate member 16 ", upper board unit Part has upper wedge face 14 ' in upper end side, and lower plate member has lower wedge face 14 in lower end side ".Plate unit Part 16；16 ', 16 " bent according to the arc-shaped of direction of rotation 13 in a top view.Additionally, wedge element 12 has substantially in water On the one hand the diskware 17 extended in average face, the diskware couples with shaft element 15, on the other hand carries in outer edge region With lozenges 14；14 ', 14 " panel element 16.

As Fig. 2 to Fig. 7 is further illustrated, shedding motion 7 has in the illustrated embodiment three along the bag 2 of tubulose The expansion member 10 being sequentially placed before and after conveying direction 5.Each expansion member 10 has wedge element 12, and the wedge element has not The wedge shape height h of the increase of conveying direction 5 of bag 2 same, along tubulose.Wedge shape height h heres along direction of rotation 11 by seeing The spacing examined between the rearward end of lozenges 14 and the bearing-surface 4 of the bag 2 in conveying device 3 of tubulose is measured.Thus, bottom Wedge element 12 of A/F b (with reference to Fig. 6) of opening 8 connects the ground of wedge element 12 and incrementally increases.

As Fig. 2 to Fig. 7 is further illustrated, wedge element 12 is observed along conveying direction 5 taken by recessed empty 18 local when rotated Ground connection arrangement, to realize the continuous growth of the A/F b of bottom opening 8.For this purpose, position is observed along conveying direction 5 Wedge element 12 ' in front have for make along conveying direction 5 it is subsequent, positioned at middle " the recessed sky for passing through of wedge element 12 18′.Correspondingly, middle wedge element 12 " has for allowing to observe the wedge element 12 being located behind along conveying direction 5 " ' rotation Recessed empty the 18 of motion ".

As Fig. 2 to Fig. 7 is further illustrated, wedge element 12 has fixing area on the rearward end region based on direction of rotation 13 Section 19, " current open shape is maintained at using the fixing section by bag section 2 ', 2 based on the Background Region of conveying direction 5 The front portion of state, at the same time, along the bag section 2 ', 2 of the importing of lozenges 14 of the subsequent wedge element 12 of conveying direction 5 bag 2 " In region 21.For this purpose, the fixing section 19 of wedge element 12 has at least one guiding arris 22, in illustrated embodiment In, guide arris 22 with a top guiding arris 22 ' and bottom respectively ", the top guides arris and bottom guide edge Rib be arranged in the related lozenges 14 ' of each wedge element 12,14 " along direction of rotation 13 observation rearward end it is substantially the same On height.

In the illustrated embodiment, on the one hand, have along wedge element 12 ' of the observation of conveying direction 5 positioned at front and be associated with The holding section 19 ' of the upper pouch section 2 ' and lower pouch section 2 of the bag 2 of tubulose ".It is possible thereby to be reliably achieved tubulose The transfer of wedge element 12 of the bag 2 from the wedge element 12 ' to centre in front ".On the other hand, in being located at along the observation of conveying direction 5 Between wedge element 12 " have corresponding fixing section 19 ", to realize bag 2 to the wedge being located behind along the observation of conveying direction 5 Element 12 " ' reliable transfer.

For example use in the disclosure for different parts, the mark " lower section " of the arrangement of such as wedge element and " top " In preferred running status, wherein, " the quilt in horizontal level of bag section 2 ', 2 on the open end region 9 of the bag 2 of tubulose Conveying.It is obvious that a kind of embodiment can also be set, wherein, bag section 2 ', 2 is " curved for example with 90 ° relative to transporting flat It is bent.In this embodiment, the part of equipment, such as wedge element 12 are then with the inclination of corresponding angle.

Claims (19)

1. a kind of bag section on unlimited end regions (9) in the bag of tubulose (2) (constitutes bottom between 2 ', 2 ") The equipment of portion's opening (8), the equipment has for transverse to conveying direction (5) delivery bag of the Longitudinal extending (6) of bag The conveying device (3) of body (2), and the equipment also have in the bag (2) of tubulose in unlimited end regions (9) On bag section (between 2 ', 2 ") constitute bottom opening (8) shedding motion (7), wherein, the shedding motion (7) is with extremely Lack one around the rotatable expansion member (10) of rotation axis (11), the expansion member can when rotated import the bag of tubulose The bag section on unlimited end regions (9) of body (2) is (between 2 ', 2 "), it is characterised in that shedding motion (7) tool Have at least two along conveying direction (5) arranged in succession of the bag (2) of tubulose expansion member (10), wherein, each is rotatable Expansion member (10) all have with least one in face of direction of rotation (13) rise lozenges (14；14 ', 14 " wedge) Element (12；12 ', 12 ", 12 " '), can be made using the lozenges tubulose bag (2) in unlimited end regions (9) On (the mutually liftoff expansion in course of conveying of 2 ', 2 ") in bag in conveying device (3), so as in the bag of tubulose of bag section (2) the bag section on unlimited end regions (9) (constitutes bottom opening (8), and the expansion of arranged in succession between 2 ', 2 ") Open the wedge element (12 of element (10)；12 ', 12 ", 12 " ') there is the conveying direction (5) of bag (2) different, along tubulose no Wedge shape height (h) of disconnected increase.

2. equipment according to claim 1, it is characterised in that wedge element (12) with two along conveying direction (5) from The lozenges of operation, preferably have upper wedge face (14 ') and lower wedge face (14 "), wherein, the upper wedge face (bearing-surface (4) of 14 ") preferably respectively with the bag of tubulose (2) in conveying device (3) is at an acute angle for (14 ') and lower wedge face Ground arrangement.

3. equipment according to claim 1 and 2, it is characterised in that expansion member (10) is with when rotated along tubulose The wedge element (12 of conveying direction (5) overlap joint of bag (2)；12 ', 12 ", 12 " '), wherein, it is located at the wedge in front along conveying direction Element (12；12 ', 12 ") have for making along the subsequent wedge element (12 of conveying direction (5)；12 ", 12 " ') the recessed sky that passes through (18)。

4. equipment according to claim 3, it is characterised in that lucky three expansion members (10), the expansion unit are set Part has when rotated along the wedge element (12 of conveying direction (5) overlap joint；12 ', 12 ", 12 " '), for importing the bag of tubulose (2) the bag section on unlimited end regions (9) is (between 2 ', 2 ").

5. equipment according to any one of claim 1 to 4, it is characterised in that wedge element (12；12 ', 12 ", 12 " ') There is fixing section (19 on rearward end region based on direction of rotation (13)；19 ', 19 "), for along conveying direction (5) position In the wedge element (12 at rear；12 ", 12 " ') lozenges (14) bag (2) that imports tubulose front area (21) in when pair Background Region (20) of the bag (2) of tubulose based on conveying direction (5) is held.

6. equipment according to claim 5, it is characterised in that wedge element (12；12 ', 12 ", 12 " ') fixing section (19；19 ', 19 ") there is guiding arris (22), the guiding arris is arranged in and lozenges (14；14 ', 14 ") along direction of rotation (13) on the substantially the same height of the rearward end of observation.

7. the equipment according to claim 5 or 6, it is characterised in that wedge element (12；12 ', 12 ", 12 " ') in lozenges (14；14 ', 14 ") with fixing section (19；19 ', 19 " have between) for making the wedge element being located behind along conveying direction (5) (12；12 ", 12 " ') the recessed sky (18) that passes through.

8. equipment according to any one of claim 1 to 7, it is characterised in that wedge element (12；12 ', 12 ", 12 " ') edge Direction of rotation (13), the especially bending of arc-shaped ground.

9. equipment according to any one of claim 1 to 8, it is characterised in that wedge element (12；12 ', 12 ", 12 " ') with It is connected with the shaft element (15) of driver coupling, the rotation axis (11) of the shaft element is preferably with bag (2) in conveying device (3) bearing-surface (4) on is substantially perpendicularly arranged.

10. equipment according to any one of claim 1 to 9, it is characterised in that wedge element (12；12′、12″、12″′) With at least one with bearing-surface (4) of the bag (2) in conveying device (3) preferably substantially vertically arranged plate (16； 16 ', 16 "), the plate constitutes lozenges (14 on side；14′、14″).

11. equipment according to claim 10, it is characterised in that wedge element (12；12 ', 12 ", 12 " ') have at least one The individual diskware (17) preferably substantially abreast arranged with bearing-surface (4) of the bag (2) in conveying device (3), the diskware With with lozenges, (plate (16) of 14,14 ', 14 ") is connected in outer edge region.

12. equipment according to any one of claim 1 to 11, it is characterised in that shedding motion (7) is with pre- opening work Position (23), the bag section on unlimited end regions (9) of the bag (2) of tubulose can be made using the pre- opening station (2 ', 2 ") are changed into spaced state from the recline up and down state of placement of planar ground.

13. equipment according to claim 12, it is characterised in that the station (23) that is open in advance is with least one guide element (24,25), the guide element has inclined, bag (2) for tubulose at unlimited end relative to conveying direction (5) Bag section on portion region (9) (guiding face (24 ', 25 ') of 2 ', 2 "), wherein, guiding face (24 ', 25 ') be used for bag area (suction element (26) that 2 ', 2 ") are inhaled on guiding face (24 ', 25 ') is connected section.

14. equipment according to claim 13, it is characterised in that be provided with for driving with guiding face (24 ', 25 ') The driving element (24 ", 24 " ') of guide element (24,25).

15. equipment according to claim 14, it is characterised in that guide element (24,25) with driving element (24 ", 24 " ') connected guide strips, especially Endless belt, constitute on the guide strips bag (2) for tubulose Bag section (the guiding face (24 ', 25 ') of 2 ', 2 ") on unlimited end regions (9).

16. equipment according to any one of claim 13 to 15, it is characterised in that the station (23) that is open in advance is with two Guide element (24,25), the guide element is with the existing from bag (2) running, for tubulose along conveying direction (5) Bag section (the guiding face (24 ', 25 ') of 2 ', 2 ") on unlimited end regions (9).

17. equipment according to any one of claim 13 to 16, it is characterised in that suction element (26) is with least one It is individual it is being arranged on guiding face (24 ', 25 '), for holding a bag section (pump orifice (26 ') of one of 2 ', 2 ").

18. equipment according to claim 17, it is characterised in that the station (23) that is open in advance is formed with least one negative pressure Unit (27), the negative pressure formed unit with the guiding face of the guide element (24,25) for being equipped with pump orifice (26) (24 ', 25 ') adjacent vacuum chamber (27 ').

A kind of 19. bag sections on unlimited end regions (9) in the bag of tubulose (2) (are constituted between 2 ', 2 ") The method of bottom opening (8), wherein, bag (2) is conveyed transverse to the conveying direction (5) of the Longitudinal extending (2a) of bag, And in course of conveying, around rotation axis (11) rotation expansion member (10) import tubulose bag (2) open wide Bag section on end regions (9) (between 2 ', 2 "), it is characterised in that shedding motion (7) with least two along tubulose bag The expansion member (10) of conveying direction (5) arranged in succession of body (2), wherein, each rotatable expansion member (10) has With at least one lozenges (14 risen in face of direction of rotation (13)；14 ', 14 " wedge element (12)；12′、12″、 12 " '), wherein, the wedge element (12 of the expansion member (10) of arranged in succession；12 ', 12 ", 12 " ') have it is different, along tubulose Wedge shape height (h) of the continuous increase of the conveying direction (5) of bag (2), wherein, the bag (2) of tubulose in unlimited end region Bag section (mutually liftoff expansion in course of conveying of 2 ', 2 ") in bag in conveying device (3), so as in tubulose on domain (9) The bag section on unlimited end regions (9) of bag (2) (bottom opening (8) is constituted between 2 ', 2 ").