CN1083375C

CN1083375C - Product overwrapping method

Info

Publication number: CN1083375C
Application number: CN97109613A
Authority: CN
Inventors: 费奥伦佐·德拉盖蒂
Original assignee: GD SpA
Current assignee: GD SpA
Priority date: 1996-03-15
Filing date: 1997-03-14
Publication date: 2002-04-24
Anticipated expiration: 2017-03-14
Also published as: DE69717888T2; JPH101103A; EP0795474A1; DE69717888D1; IT1285614B1; ITBO960139A1; ITBO960139A0; EP0795474B1; CN1164500A

Abstract

The present invention is to provide a method for wrapping a product (2) in a wrapping material sheet (33), each product (2), moved continuously along a carrying path (P) while its sideways faces (12) are kept perpendicular to a moving direction (8) at all times, is wrapped in the sheet (33). The sheet forms a tubular package (35) round the product (2) and the end faces of the product (2) are engaged with a clasping device (43). The clasping device (43) is continuously moved along the carrying path (P) through the formation of the tubular package (35) and kept held in a clasping position which is parallel to the moving direction (8).

Description

Product overwrapping method

The present invention relates to a kind of product overwrapping method.

The inventive method is useful especially for continuous overwrapping machine, for example can be used for the continuous Wrapped in Cellophane machine as tobacco products such as cigarette cases, this below the embodiment in the specification sheets will be referred to.

Though be mainly concerned with the package sheet material that is used to have themoplasticity or heat seal below in the specification sheets, also can be used for other sheet material, to carrying out gluing or adopt the fixed form be equivalent to sealing-in in its part.

As mentioned above, at the GB-1 of British patent, 134, a kind of continuous Wrapped in Cellophane machine with thermoplastic sheets external packing cigarette case is disclosed in 500, it infeeds cigarette case continuously along specified path, and move continuously along the path, first road parcel operation is that each sheet material is converted into U-shaped around corresponding cigarette case; Second road parcel operation is the tubular parcel element that sheet material further is folded to form both ends open around corresponding cigarette case; It is the vertical sealing-in of tubular parcel element that first road reinforces operation; The 3rd road parcel operation is folding the leaning against on the cigarette case of open end tubular parcel element; The last operation of reinforcing together is that folded end to tubular parcel element carries out sealing-in.

In known continuous Wrapped in Cellophane machine, above-mentioned second operation work, i.e. the operation that the tubular pack case is carried out lateral seal transmits cigarette case and corresponding sheet material is finished by carrying at two between the running roller.

Speed of production when the Wrapped in Cellophane machine moves surpasses 600 to 700 box per minutes, and said method will cause critical defect, causes external packing to produce the distortion of not allowing, especially when operating than fine sheet in 10 to 15 micrometer ranges, is out of shape very serious.This defective when forming tubular parcel element, can not provide stable control mainly due to said method to corresponding cigarette case.

The object of the present invention is to provide a kind of product overwrapping method of eliminating above-mentioned defective.

The invention provides and a kind ofly carry out the method for product external packaging with package sheet material, this method comprises the steps, infeeds product continuously and moves continuously along this path along specified path, and first road parcel operation is that sheet material is folded into U-shaped around corresponding product; Second road parcel operation is that sheet material further is folded to form the tubular parcel with open end around corresponding product; It is to seal tubular parcel element by vertical edge sealing that first road reinforces operation; The 3rd road parcel operation is described open end to be folded lean against on the product; It is to reinforce folding end by the end sealing-in that second road reinforces operation; The method is characterized in that and carry out first and second roads parcel operation when clamping product by holding device, wherein when carrying out whole described first and second roads parcel operation, the clip position of holding device stabilization on product.

Whenever in said method, preferably each product is along described path and along all infeeding perpendicular to the throughput direction of its side basically.

According to the preferred embodiment of said method, when carrying out first and second roads parcel operation, clamp product by holding device, make its end face be parallel to throughput direction.

Carrying out also preferably will clamping the product end when first road reinforces operation with holding device.

The embodiment of indefinitenesses more of the present invention is described below with reference to accompanying drawings, wherein:

Fig. 1 shows the diagrammatic side views of the continuous Wrapped in Cellophane machine of realizing the inventive method, for the sake of clarity, removes some parts;

Fig. 2 shows the three-dimensional sketch of the operation series of wrapping machine shown in Figure 1;

Fig. 3 shows the diagrammatic side views of the amplification of Fig. 1 first details;

Fig. 4 shows the enlarged drawing of Fig. 3 first details;

Fig. 5 shows Fig. 3 second portion details view of apparatus;

Fig. 6 shows the diagrammatic top view of the amplification of Fig. 1 second portion details;

Fig. 7 shows along the section drawing of Fig. 6 VII-VII line;

Fig. 8 shows the enlarged drawing of another details of Fig. 3;

Fig. 9 shows along the section drawing of Fig. 8 IX-IX line;

Figure 10 shows the amplification stereogram that Fig. 6 improves details;

Figure 11 shows the amplification diagrammatic side views of improved first details of Fig. 8;

Figure 12 and 13 shows the amplification diagrammatic side views of improved second details of Fig. 8 at different control positioies.

Label 1 representative among Fig. 1 is used for the continuous Wrapped in Cellophane machine of cigarette case 2.Wrapping machine 1 comprises feed conveyor 3, and it is made up of around two belt pulleys 5 (one of them is a driving wheel) belt 4, and two belt pulleys around separately, be parallel to each other and substantially horizontal axis 6 rotation.Belt 4 comprises some transverse projections 7 of 6 of paralleling to the axis, and constitute a plurality of conveying grooves with contiguous projection 7, carry branch 9 to measure along throughput direction 8 on belt 4, the length of each conveying groove is greater than the width of cigarette case 2, and its width is substantially equal to the length of cigarette case 2.Each cigarette case that obtains from the turntable conveyer 10 of feed location 11 moves along the conveying branch 9 of belt 4, and each cigarette case 2 is all balanced along direction 8, makes its little vertical side 12 and vertical with direction 8 basically forward.

Wrapping machine 1 also comprises the first packing conveyer, 13, the second packing conveyer 14 and outfeed belt conveyors 15, and their series connection are provided with, interconnect, and forming one with feed conveyor 3 is the path P of S shape basically, and cigarette case 2 can infeed along it.

Especially, path P comprises and feed location 11 series connected first straight line portioies 16 that limited by the feed part of conveyer 3 and conveyer 13; First circular arc portion 17 that limits by the arc sections branch of conveyer 13; Second straight line portion 18 relative with straight line portion 16 comprises the output section of conveyer 13 and the pan feeding part of conveyer 14, and this straight line portion and

part

16 and 17 form U-shaped path P 1 basically; Second circular arc portion 19 that forms by conveyer 14 circular arc portions; The 3rd straight line portion 20 that is formed by outfeed belt conveyor 15 is relative with

part

16 and 18.

Fig. 3,6,8 and 9 is clear to be illustrated, and conveyer 13 comprises two parallel internal tooth form bands 21, separately around a pair of toothed belt wheel.Especially, link to each other with separately active feed belt pulley 22 with 21, belt pulley with the belt pulley 22 of other belt 21 around separately, 6 axis 23 rotations of paralleling to the axis, and dish 24 shown in Figure 9 constitutes one by cylindrical central sleeve 25 with other dish 24 and forms column cylinder 26.The peripheral edge portion of cylinder 26 be with 21 to contact, form the circular arc portion 17 of path P and P1, axle 27 has 23 the axis 28 of paralleling to the axis, axle 27 cooperates with cylinder gap and is supported in fixed mount 29 with belt pulley 22 and 5.

Comprise that with 21 one is the top branch 30 of straight line basically, define the output section of the straight line portion 16 of path P and P1, and extend to a feed location 31, infeed continuous package sheet material 33 by a known line 32, each package sheet material at first forms U-shaped parcel element 34 around cigarette case 2 is folding separately, forms tubular parcel 35 then, it axially stretches out relative end 36 in the respective end of cigarette case 2 separately, and then is folded to form osed top parcel element 37.In the position 31, package sheet material 33 is vertical with belt 21, and is at regular intervals between the belt 21, forms the passage 38 wideer than package sheet material 33.

Fig. 6 is clearly shown that each belt 21 comprises that some are formed at the through hole 39 on belt 21 thickness directions, and this through hole 6 directions that parallel to the axis are extended, and along belt 21 spaced sets, and the distance of space equates between the distance of its space and the projection 7.Bar 40 is in axial sliding contained in hole 39, and this bar is coaxial with the bar 40 on another belt 21, and at the free end of bar, platen 41 has been installed in close passage 38 inboards, and its lateral dimension is approximately equal to but is not more than the axial end 42 of the cigarette case 2 parallel with direction 8.

Each forms the clamper 43 of anchor clamps 44 to corresponding bar 40 and platen separately 41, bar 40 and platen 41 are controlled by control setup with respect to the axial location of belt 21, this device comprises cam driving gear 45, its part that constitutes anchor clamps 44 also comprises, for each belt 21 all be provided with identical with its shape and with axis 23 plate 46 vertical with 28.This plate 46 is positioned at the opposite side of relative article one belt 21 of belt 21, comprise corresponding peripheral edge path 47, a plurality of sliding rollers 48 are housed on it, these sliding rollers are equipped with the opposite end of platen 41 1 ends with bar 40 and link to each other, vertical at the move around curve movement of platen 41 of clip position with direction 8, at the platen 41 of clamper 43 each other with the distance of minimum separately, from the directional survey vertical with end face 42, this distance is approximately equal to but is not more than the length of cigarette case 2.

With reference to Fig. 1,6 and 7, feed conveyor 3 comprises the discharging part of extending along the passage between the belt 21 38, and as shown in Figure 7, this conveyer is downward-sloping with respect to the branch 30 of belt 21, the Surface Vertical of its projection 7 and branch 30.Conveyer 3 is downward-sloping, feasible surperficial contacted cigarette case 2 with branch 30 is separated at dislocation 49 places and projection 7, dislocation 49 is positioned at trip under the clip position 50 along direction 8, and the platen 41 of each clamper 43 enters the clamping station at clip position 50 places.

In order to prevent to damage cigarette case 2, each platen 41 comprises cited deformable ends element 51, and it can directly fit in the free end of bar 40, or remodeling as shown in figure 10, can connect a ducted body 52 between bar 40 and element 51, and it has outer suction socket 53.

Especially as shown in Figure 8, clamper 43 interrelates by cylinder 26 and sealing arrangement 54, and the sealing device comprises two

axles

55 and 56 parallel with axis 28, is used for along circumference 57, preferably but and optionally rotate between dish 24.

Axle

55 and 56 is equipped with the

spiral arm

58 and 59 between dish 24, its protruding belt 21 separately.Under the effect of platen 41, on the conveying circular arc of axis 28, be equipped with on the spiral arm 58 towards the sealer 60 of the throughput direction 8 of cigarette case 2, the back cushion 61 relative with edge sealing device 60 is housed on the spiral arm 59.The

axle

55 and 56 of sealing arrangement 54 can rotate along opposite direction under the effect of actuating device 62 (see figure 9)s, this actuating device comprises two bell-crank levers 63, it links to each other with 56 end with axle 55 towards fixed mount 29, also comprise the tappet roller 64 that embeds path 65 with roll mode, this path 65 is formed on the face of ring cam set 66 of the fixed position that is positioned at fixed mount 29.

In remodeling shown in Figure 11, back cushion 61 comprises a tooth 67, and the excircle that it is parallel to cylinder 26 points to corresponding sealer 60, and it is positioned at by platen 41 effect, around the outside of the conveying circular arc of axis 28; Each tooth 67 is positioned at the radial outside of radial push pad 68, promotes pad 68 and is assembled together between dish 24 and with an end of radial bars 69.Radial bars 69 is installed in the radially-directed spare 70 that coils on 24 with sliding type, this bar 69 also comprises, promote the opposite other ends of pad 68 being installed on, a transverse bolt 71 swivel bearings are on tappet roller 72, and tappet roller 72 is embedded on the path 73 of cam 66 with sliding type again.

As shown in Figure 1, belt 21 comprises the inferior division 74 relative with branch 30, and its top set 75 with the belt 76 of conveyer 14 is coaxial.Belt 76 has and belt 4 similar projections, and is looped around the belt pulley 77 of dislocation 78 between belt 21, and around active sealed cylinder 79, and the rotation axis 80 of this cylinder parallels to the axis 6 and the rotation axis 81 of belt pulley 77.Branch 74 and 75 forms the straight line portion of path P and P1, and the circumference of cylinder 79 defines the curved portion of path P, and it is tangent at dislocation 82 and outfeed belt conveyor 15.

The folding position 83 of branch 75 by being limited by known folding device 84 folds the end 36 of wrapping up element 35, forms corresponding parcel element 37; Cylinder 79 is equipped with double-type known end seal 85, is used for the folding end 36 of stable parcel element 37.

Here conveyer 14 is not further specified, because of it is disclosed in U.S. Pat 5,477,661, the entire chapter file has carried out sufficient explanation to this.

Especially as shown in Figure 4, the top set 30 of belt 21 by the folding station 86 near the downstream of load station 31, this station 31 is limited by 6 two running rollers 87 of paralleling to the axis, and one of them is positioned on another with respect to fixed mount 29 with direction 8.Two running rollers 87 define the path along path P, and distance is approximately equal to but is not less than the thickness of cigarette case 2 between two running rollers, by from perpendicular to the directional survey of branch 30 and direction 8 as can be known.Folding position 86 also comprises two plates 88, and as the pole plate of cond 89, it is near the downstream position of running roller 87 in direction 8, and it and with running roller 87, defines the path of cigarette case 2 about path P.

Especially as shown in Figure 4, the next folding station 90 of the straight line portion of the top set 30 of belt 21 by being positioned at path P and P1, it is positioned at the downstream of folding station 86 along direction 8, this position is limited by 6 the running

roller

91 and 92 of paralleling to the axis, and wherein a running roller is positioned on the other running roller with respect to fixed mount 29.

Running roller

91 and 92 comprises

radial attachment

93 and 94 separately, and it is along the excircle longitudinal extension of running

roller

91 and 92, thereby forms the mobile folding element, and itself and path P and P1 intersect, and pleated sheet 33 leans against on the facing surfaces 12 of cigarette case 2 its folding.

As shown in Figure 5,

annex

93 and 94 is made of metal, and has circular hole 95, and this hole is used to hold metal embolus 96, is located among the annular dielectric element 97; Metal embolus 96 and

corresponding annex

93 and 94 have formed the pole plate of recombiner condenser 98.

To unload cigarette case 2 from conveyer 10 now, it be contacted with complementary protuberance 7 on the conveyer 3 in load station 11 begin to illustrate the operation of utilizing wrapping machine 1 wrapping cigarette packs 2.

By carrying with direction 8 constant speed along the branch 9 of conveyer 3, cigarette case 2 enters the passage 38 that the belt 21 by conveyer 13 is limited, and reduces gradually up to the surface 42 of cigarette case 2 to be lived by platen 41 clampings of respective clamp device 43.Until station 49, cigarette case 2 is transferred machine 4 and carries simultaneously along direction 8 with identical speed with 13 in the specified distance in station 50 downstreams, only links to each other with conveyer 13 by corresponding clamper 43 then, and cigarette case passes through folding station 86 with constant speed like this.

In folding station 86, each sheet material that cigarette case 2 interception is infeeded by supply lines 32, and sheet material 33 infeeded the path that the two-plate 88 by two running rollers 87 and cond 89 is limited, make sheet material 33 be folded into U-shaped and wrap up element 34 around cigarette case 2.More particularly, when folding, sheet material 33 middle parts are contacted with the surface 12 of cigarette case 2, its both ends are contacted with lower surface with the top of cigarette case 2, and two ends of stretching out 99 are extended back with 100 sides 101 from surface 12 relative cigarette cases 2.

When sheet material 33 transmits between the plank 88 of cond 89, on the sensed sheet material 33 of electric charge, make the opposite sides of cigarette case 2 have corresponding opposite polarity electric charge, the outer wrapping element is made by dielectric material.Sheet material 33 tightly is attached on the cigarette case 2 with the folding profile of U-shaped, and can be infeeded folding position 90 safely by attracting each other between electric charge., stretch out partly 99 here, and sponson 100 is by running roller 91 folding leaning against on the surface 101, and part is pressed on the folded part 99 by running roller 92 folding leaning against on the surface 101.Utilize this further end folding process of cigarette case 2 when the straight line portion of path P and P1 is carried, can guarantee high-precision folding, sheet material can be fully folding around cigarette case 2, and form tubular parcel element 35, and this operation does not need clamper 43 to decontrol cigarette case 2.

Folding

sponson

99 and 100 o'clock, these two

parts

99 and 100 can be close on the cigarette case 2 and be close to mutually be by the cond 98 from the

annex

93 and 94 of running

roller

91 and 92 sense these two

parts

91 and 92 and surface 101 on electric charge guarantee.Guaranteed that from the electric charge of cond 89 and 98 inductions sheet material 33 can tightly be attached on the cigarette case 2 tubular parcel element 35 whole forming processes.If

annex

93 and 94 is as direct folding device, in the forming process of tubular parcel 35, the position of the sheet material 33 on the cigarette case 2 can be controlled by the platen 41 that form shown in Figure 10 adopts.

When cigarette case when the curved portion 17 of path P and P1 is carried, stablizing of parcel element 35 by connecting

bridge

99 and 100, promptly clamp cigarette case between sealer 60 and corresponding back cushion 61 and form vertical sealing-in, wherein sealer 60 is at sealing-in connecting bridge 99 and the pressure that provided balance at 100 o'clock.

Reinforce parcel element 35 and preferably adopt sealer shown in Figure 11 54, wherein the tooth 67 of radial push pad 68 and back cushion 61 prevents that the roof of cigarette case 2 and diapire from outwards swelling under the lateral pressure effect of sealer 60 and back cushion 61.

In case sealing forms parcel element 35, cigarette case 2 is infeeded station 83, folded end 36 in known manner here, thus form osed top parcel element 37, can be when the curved portion 19 of path P is carried at cigarette case 2 by sealer 85 to its reinforcing.

In the remodeling shown in Figure 12 and 13, the folding station 102 that folding station 90 among Fig. 1 and running

roller

91 and 92 are positioned on path P and the P1 circular arc portion 17 replaces.At station 102, the known folding device 103 of the cylinder 26 of the inside part 99 by being installed on sealing arrangement 54 of parcel element 34 is folded on the surface 101 that leans against cigarette case 2, this folding device is removable with respect to cylinder 26, and by known actuating device, preferably utilize cam 66 on another path (not shown), to drive, make folding device 103 move to and part 99 is pressed against position on the surface 101 of cigarette case 2 from the position that front and path P 1 intersects.As shown in figure 12, on the other hand, part 100 is folded device 104 folding being pressed against on the surface 101, and this folding device 104 comprises the belt 105 around two belt pulleys 106, and wherein a belt pulley is an actv., and this belt is identical with the kinematic velocity of belt 21.A plurality of folding elements 107 are set on the belt 105, also comprise branch 108, it extends in cylinder 26 outsides, carry with the direction identical, and keep parallel, when passing through position 102 with belt 21 by aspirator 109 with belt 21, in time to corresponding cigarette case 2 feeding folding elements 107, and, make on its surface that is pressed against box 2 101, and part is pressed on the part 99 in this position clamping and folding part 100 of wrapping up element 34.

In actual applications, at first are pressed against on the surface 101 part 99 is folding by folding device 103; Use folding element 107 folded parts 100 then, it vertically is pressed against on the surface 101, and part is pressed on the folding device 103, then folding device 103 withdraws from this point, decontrols part 99 and makes that sealer 60 can sealing-in

part

99 and 100 lap.

Claims

1, a kind of method of product (2) being carried out external packing with package sheet material (33), this method comprises the steps, infeed product (2) continuously and along this path (P) continuously operation, first road parcel operation is that sheet material (33) is folded into U-shaped around corresponding product (2) along specified path (P); Second road parcel operation is that sheet material (33) further is folded into the tubular parcel element (35) with open end (36) around corresponding product (2); It is to seal tubular parcel element (35) by vertical sealing-in that first road reinforces operation; The 3rd road parcel operation is described open end (36) to be folded lean against on the product (2); It is to fix folding end (36) by the end sealing-in that second road reinforces operation; The method is characterized in that: carry out first and second roads parcel operation when clamping product (2) by clamper (4 3), wherein when carrying out whole described first and second roads parcel operation, clamper always remains in the clip position of clamping product (2).

Whenever 2, the method for claim 1 is characterized in that: each product (2) is along described path (P) and along all infeeding perpendicular to the throughput direction (8) of its side (12) basically.

3, method as claimed in claim 1 or 2 is characterized in that: when carrying out first and second roads parcel operation, clamp product (2) by clamper (43), make its end face (42) be parallel to throughput direction (8).

4, the method for claim 1 is characterized in that: when carrying out first road reinforcing operation, also will clamp product (2) with clamper (43).

5, the method for claim 1 is characterized in that: described path (P) comprises straight line portion (16,18,20) and curved portion (17,19); When carrying, described straight line portion (16) to carry out described first road parcel operation at least at product (2).

6, method as claimed in claim 5 is characterized in that: when product (2) will carry out described first and second roads parcel operation at least when described straight line portion (16) is carried.

7, method as claimed in claim 6 is characterized in that: when product (2) carries out whole described parcel operations when the straight line portion of described path (P) is carried.

8, the method for claim 1 is characterized in that: described path (P) comprises straight line portion (16,18,20) and curved portion (17,19); When product (2) is carried along the part (P1) in the path (P) that only comprises a curved portion (17), carry out whole described parcel operations.

9, method as claimed in claim 8 is characterized in that: the part (P1) of described path (P) is the U-shaped part, and it comprises by interconnected first straight line portion of curved portion (17) (16) and second straight line portion (18).

10, the method for claim 1 is characterized in that: described path (P) comprises straight line portion (16,18,20) and curved portion (17,19); When product (2) carries out described first and second roads parcel operation at least when at least a portion of described straight line portion (16,18,20) is carried, and carry out described reinforcing operation during along at least a portion conveying of described curved portion (17,19) when product (2).

11, the method for claim 1 is characterized in that: carry out one of described first and second roads parcel operation under the situation that electric field exists at least.

12, the method for claim 1 is characterized in that: described package sheet material (33) comprises thermoplastic material; Described reinforcing operation is a sealing process.