DE7804406U1 - Device for forming and covering a shrink film hood over a piece goods to be shrunk, with an unfolding device for unfolding and dividing the folded-up tubular film and with a covering device - Google Patents

Description

Dr.-Ing. WALTER STARK

PAT E N TAN WALT

Moerser Straße 140 D-4150 Krefeld 1 ° & (021 51) 28222 and 20469 El 8 53 578

date

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Maschinen-u.Stahlbau Kleve GmbH, Zemnadestr. 3, 4192 Kalkar-Wissel

Device for forming and covering a shrink film hood About a piece goods to be shrunk with an unfolding device for unfolding and dividing the folded up introduced film tube and with a pull-over device

In the known devices of the type mentioned at the outset, the film tube is attached from above to the one to be shrunk Piece goods are brought in, then unfolded and after being cut off as a shrink film hood over the piece goods to be drawn. This method requires a very space-consuming device with a relatively large overall height, which also is complicated to set up and maintain.

The invention is therefore based on the object as possible to find compact device of simple construction.

This object is achieved according to the invention in that the unfolding device arranged in the lower region of the device

9 # un * e B »nk AG KrefekJ W3 / 1S25 bank code 32070080 - Stadt-Sparkasse Krefeld 305722 bank code 32050000 - postal check Essen 4055-431 bank code 36C50043

7804406 10/19/78

PATENT ADVERTISER DR. STARK ■ MOERSEH STn. T ₁ AO ₁ - ¹ D-sil5 {- KF {£ F ^ D - ^ g "(02151) 2S222 & 204S9 · Tx 355573

and the pull-over device is at least one. Beam for receiving the upper, unfolded edge of the Foiienscblauches, wherein the 'support arm vertically movable and is hinged at least in its uppermost position. With this device, the shrink film hood first pulled from bottom to top and after cutting off the previous shrink film hood at the cere edge unfolded and after separation from the subsequent film tube turned by 180 ° and then pulled over the piece goods. In contrast to the known devices, the The film tube is no longer brought in from above, but from below. This results in space advantages, in particular with regard to the sow height, since the shrink film hood is produced in the area of the floor. With the other Transport of the shrink film hood thus formed is also used the effect that this is through the own movement inflates and so also when turning by 130 ° and when subsequently pulling over the piece goods maintains its bloated shape.

In an embodiment of the device according to the invention, it is proposed that the unfolding device have two unfolding altars. the two sides of the flat sides of the film tube entering the unfolding device with parallel to these flat sides! Pivot axes are arranged and which have adhesive devices at their ends for gripping the film tube. It is useful that the folding arms are parallel to the flat sides when grasping the film loop. This results in e.

7804406 10/19/78

PATENT ADVOCATE DR. STARK · MOERSEft STft. iAO, - D-VI50 KFEFEJ-D · * §> (02151) 28222 and 20459 ■ Qgj 853578

- 2a very simple design of the unfolding device.

According to a further feature of the invention it is provided that the adhesive devices are designed as suction cups. Such suction cups are extremely effective and reliable with the simplest design.

The invention also provides that the unfolding device has two guide rollers arranged next to one another for the incoming Has film tube. It is useful that the pivot axes of the folding arms with the axes of rotation the guide rollers coincide.

According to a further feature of the invention it is provided

7804406 10/19/78

INTAMWALT DR. STARK · MOERSCR'sTR. hf) ^ D-4150 KREFeLD ^ f ¹ (02151) 28222 and 20469 - Tg 853578

the folding arms in the area of the adhesive device each have a guide roller so that the film tube is exactly between the
Detention facilities is run.

Furthermore, it is proposed according to the invention that cutting devices on the Auffaltnriaen above the adhesive devices
are provided. In this way, "with the Fasser, des
Film tube at the same time also separated the previous piece of film tube, so that this over the piece goods
can be drawn. It is advisable that at dsn
Conspicuous poor above the detention facilities and possibly the
Cutting devices welding devices are provided,
During the cutting process, the lower end of the
cut piece of film tube welded together, εο that \

a closed shrinkage \

foil hood results. I.

\ The Erfinaung also stipulates ds3 the Tragarrr.e XLi-.rr.rr.srn?

for grasping the upper edge of the au ^ eiriar.cerrefal ^ eten; Have film tube. These clips can be used both as spring clips and as automatically controllable clips
be designed, the latter not being operated by Hsnd
require.

I Expediently, the brackets should ar den Trsgarir.en 1

be arranged so that they iasr.en the film tube at the corners,;

7804406 10/19/78

DR. STARK ■ JwfOERS &i'stR.ίΐ40'-0'-415O KÄEFtLD - <5? (02151) 25222 U. 20469 · Jg 853578

because then the rectangular shape of the film tube or after the. Cutting off the shrink film hood is retained.

The invention also provides that the clamps of the support arms in the position when the upper, ~ anc.es of the film tube ^ are upwards away . This has the advantage that when the shrink film hood is pulled over α = ε piece goods, the support arms do not come down that far.

According to a further feature of the invention is Vorges;. 'La;. He that the clamps via spacers to a distance while Vahrur.c coating the roughing ff oil ierJnaube about ά ^ ε cargo are connected.. These spacers kör.r.er. ceistiels can be designed as brush strips.

According to the invention it is further provided, ia3 -er or respectively. de support arms each on a guide column verscr.ie ^ li:?. reiü .-. r- si :: -. It has proven to be a z \: ez's ~ 'a'lLre l ^"r ur ever; ~ .. ^i..>; R, Id 3, two guide columns, each with an x Carry:: rhc Zvir.?.. -n isr unfolding device and the; pull-over space for cz.s "- 'Jckjut engoudnet are.

The support arms can, like the rrfin ^ lun? ferr.er vorcich ^, -_r. .; '·: ■. a Schwenkeinrichtur.g on ^ hanging, the sr. the. FJr.rjr .: s- pillars via a circulating chain rr.it uiEtiu-TDarer. Ar.triets- motor can be moved up and down sir.d. It is special

7804406 10/19/78

PATENT APPLICATION Γ DR. STARK ■ MOERSER STR. ", 4C · D-41Cj Kr.EF ^ LD · -? Ί (02151) 2c2 / ·, '; L. 2C4l9 ■ Tx G53 57c

useful if the support arms are attached to the Echwer.keinrichtur.g '.Ir ar
each a rotatably mounted, but lockable Schv / enkke ^ xenrad are attached, which engages in the Ketxe. Zöler.rc
this 5heavy.kketter.rad blocks i. <r ;, sir.d 'o ~ te ur.c Ξ' ·. · .-. ov:> equipment firmly connected to each other, so caf; the i7c .-. · ..- :. · .-.! ■ -—
devices with up and down movement of the chain rr.itce rihrz
will. However, if the Sc; iwer.kkctter._ ⁱ äcer r-alcs ;, io 'o'ii:;: the pivoting devices are stationary, since the chains then curd; who: can walk through. By engaging ir. The Y. ~ z ±? R. f'ir.re: however the swivel chain wheels rr.it the Tragarrr. ^ n now :: er.r one
Swivel movement from, so there: 3 those of the. Tra. ^r sr.r /? r. λϊλ'Ι "? :: c
Schruxpfflienhaube von der Auffalteimricr / '. Ur.g z ^ ~. ΤΛ'Ιζ ':' - · .... t
is promoted. After finishing the ech '. ^ Rd -:': ;; .-. ι -; ::.; verier.
the swivel sprockets block; se da.3 themselves, many eiv.e
fixed connection between the chains and the. 5c: ", e .-": eir. ^ Ioh - j: results. Die Schvenlceinrichtur.rren sctzer. Zier.. ? Rj: γ.λ- ';
below in motion, so that the shrink wrap. hiMcs üd-jr caz
General cargo is pulled.

GecäS another Kerkrai of the invention izz vorgecer.er., Da 'in the swivel devices below and above the Sch ".: Er.kkette wheels each for a freely rotatable guide chain
are arranged, between which the? Iet ~ e runs around the Schwenkettenrac. This results in a relaxing
large pressure angle on swivel sprocket.

7804406 10/19/78

PATENT ADVOCATE DR. STARK · MOERSEH 'STR. 'mO ' ■ D-Hi ") KlEFf-LD ■ K '(02151) 23222 and 2C459 ·'Tx; 853 578

The invention also provides that the chain in each case in such a way In the swivel chain wheel einfaßx that ier, respective Tra ^ -r ^ In the released state of the swivel sprocket, chains running downwards from the unfolding device to the pull-over area pivots.

Finally, part of the invention is proposed; ir. top dead center a locking device to release the blocking of the swivel sprocket is provided.

In the drawing, the invention is illustrated in more detail using an exemplary embodiment. Εε show:

Fig. 1 is a film tube is a cross section;

Fig. 2 is a front view of the Auffalt- and "'berzieheinrichturj =

3 shows a side view of the pull-out device; Fig. 2 and

4 shows a side view of a guide column of the guide device according to FIGS. 2 and 3.

FIG. 1 shows a conventional tubular film in cross section as it is used for shrinking piece goods. He

7804406 10/19/78

ENTANWALT DR. STARK · MOERSEfc STR. 140. · 'D-415C KPtFELD ■ £' (02151) 2S222 and 2C469 ■ Tx, 853573

has two flat sides, between which the other two flaoh sides are folded. In an unfolded Zus-caiic. \ this tubular film 1 forms a rectangle.

As can be seen from FIG. 2, this film tube 1 is rolled up into a roll 6 which Rolleötäncler 7 is stored. The film tube 1 is drawn off horizontally from this roll 6 in the vicinity of the base 8 and then runs vertically into an unfolding device 9, being deflected by two deflecting rollers 10, 11.

The unfolding device 9 essentially consists of two hold-open arms 12, 13 pivotably mounted concentrically to the axes of rotation of the Urclenkv / alzen 10, 11, on which guide rollers 14, 15 are mounted. Successively suction cups 16,17, depending on a cutting edge 13,19 Iind i fcowie Depending on a welding bar 20,21 arranged at the free ends of the ufh * = l "car .- :. e 12, 15..:

fceiin pivoting together of the two Aufhaltarme 12.13 (durchriizogen \ illustrated position) of the ■ between these passing therethrough film hose 1 is also welded by means of the beidenSchveißleisten 20,21 and cut by the two cutting edges IS, 19 so that the overlying Folier.- not shown here tubular piece is formed into a bag-like shrink film skin . The suction cups 16, 17 grasp the two flat sides

7804406 10/19/78

■ ENTANWALT DR. STARK · MOERS ^ R 'StR. ^ 40. "· D-4iiO Ki [EFtLD ■ ^ (02151) 2e222 and 2OIGS · JxI 853573

2.3 of the remaining, i.e. not cut off, Folisrisc'.i ¹ also :. " By pivoting the hold-up axes 12, 13 in the direction of arrows A, B, the flat sides 2, 3 are bent apart, wcbe.i / the flat sides, not visible here . 4, 5 unfold ( position of hold-up arms 12, 13 and Foil hose 1) In this unfolded position the upper edges of the foil hose ^ 1 form a rectangle when viewed from above.

The upper edges of the film tube 1 are insane. Subsequently detected by a pulling device 22. This pull-over device 22 has two spaced- apart Jührungssciulen 23, 24, on each of which a Schwenkeinrichtur.g 25, 25 for each one Τγ-.γξ: ': γ extending perpendicular to the plane of the drawing. 2?, 28 are suspended in a vertical direction. The guide pillars 23, 24 stand between the filling device 9 and the piece goods 29 arranged behind it in this view.

The up and down movement of the pivoting devices 25, 26 takes place by means of a revolving chain 30, 31 'each, which are passed through the pivoting devices 25, 26 , as shown in more detail in FIG. These chains 30,31 are az. The lower and the upper end are placed over deflection sprockets 32,33,34,35, the lower deflection sprockets 32,34 each via an electric motor

7804406 i9.io.78

PATENT ADVERTISER DR. STARK · MOERSäS'STR. Ϊ-Χ1 '■ D'-TaO KkEFtLD · -ΪΓ- (021 = -) 28222 and 20463 · Tx 353Ξ72

36,37 driven with reversal of direction of rotation are.

The support arms 27, 28 each have two spring clips 35, 33. These spring clips 38,39 grasp the upper edge of each unfolded film tube 1 at the four prongs, when the support arms 27, 28 are in the lowest position shown are. By lifting the support arms 27, 25, the film tube withdrawn from the roll 6 by a corresponding amount. After a certain distance, the swivel devices 25,26 and thus the support arms 27,28 stopped and the Auffaltarr.e 12,13 swiveled together again. This is how it is done the pulled-out piece of tubular film from those who were behind them Film tube separated and immediately welded together on its underside, so that a shrink film hood forms.

By pivoting the support arms 27, 28, the severed shrink foil hood is conveyed over the piece goods 29 and then pulled down over them. This process can be seen in particular from FIG. This figure shows, in a side view rotated by 90 ° in relation to FIG. 2, the pull-over device 22 with the piece goods 29 standing next to it on rails 40, 41. The unfolding device shown in FIG. 2 is omitted here for the sake of clarity.

7804406 10/19/78

PATENT ADVERTISER DR. STARK · MOERSÖR'stR. ii «* · D'-4idO KhEFiHLD ■ * S? (02151) 28222 and 20469 · [g 353578

In the lower position, shown in solid lines, the Support arms 27, 28 straight the film tube 1 by means of the spring clip !! collected. Then the film tube 1 is up to The dash-dotted position of the pivoting device 25 is raised, the support arm 27 (the other support arm 28 is covered by the mask) but not yet swiveled. The film tube is then separated from the subsequent film tube, so that a shrink film hood results.

The support arms 27 are then rotated 160 ° in the direction of arrow C. pivoted so that it is just like the shrink film hood are in the dot-dash position.

The pivoting movement / is followed by a lowering movement without interruption, so that the Schrur.pffolienhaube 43 is pulled over the piece goods 29 from top to bottom. In the case of both the swiveling and the lowering evaluation, there is an air bubble in the foil hood, which keeps it bulged so that it can be pulled over without any problems. When the piece goods 29 are completely enveloped by the shrink-fit clierihaucs, the support arms 27 are pulled down a little further, so that the loose clasps 3c, 42 are pulled off the edge. Then the support arms 27 pivot back again by 180 ° and take over again the end of the film tube ^

The swivel mechanism of the swivel devices 25, 26 results

7804406 10/19/78

PATENT ADVERTISER DR. STARK · NiOERSER ^- STR. ! "140 '· D-4150 KfcEffeLD · " §? (02151) 28222 and 20469 ■ T? 353578

from Figure _4t where the latter is shown enlarged in a side view of the guide column 24. The chain 31 stretched between the upper and lower deflecting sprockets 34, 35 is passed through the pivoting device 26 in the shape of a rod. This guidance is effected by a set of three rotatable chain wheels arranged one below the other, namely two guide chain wheels 44, 45 and a swivel chain wheel 46 arranged between them.

The swivel chain Bd 46 can be blocked by a braking device, not shown here. Since the chain 31 engages approximately half the length of this swiveling chain wheel 46 through the rod-shaped guide, the chain 31 and the chain device 26 are firmly locked together when the swiveling chain wheel 46 is blocked! t> unden. During an upward or downward movement of the chain 3 * ″ guided by the heavy lifting device 26, the carrying arm 28 moves along with it.

In the position shown, the pivoting device 25 has passed Movement of the chain 31 in the direction of arrow D reaches its uppermost point. By a not shown here in detail The locking device is now blocking the Schv / enkkettenraäes 46 solved. At the same time, the drive is via the lower

7804406 10/19/78

PATENT ADVOCATE DR. STARK · MOERSER St3r. MC ·· "D-415Q KREFEiLD · Ig ¹ (C2151) 23222 and 20469 · ^r j £ 35357S

Deflection sprocket 34 reversed, i.e. the direction of rotation reversed The strand of the chain 3 ″ which is guided by the pivoting device 26; now runs in the opposite direction (arrow E). Since the crouching of the swivel sprocket 46 is now released, but the pivoting device 26 is not initiated, but remains in the position shown. For this purpose, the swivel sprocket 46 is rotated, in a counterclockwise direction, so that the support arm 28 is pivoted in the direction of arrow F.

After pivoting the support arm 28 through 180 °, the shear chain wheel 46 is blocked again. With this blocking, the connection between the pivoting device 26 and the chain 31 is established again, so that both move downwards. Since the blocking takes place while the chain continues to run in the direction of the Ffsils E, the pivoting movement changes over to the downward movement without any transition, so that the air bubble that forms in the shrink-fitting hood 43 is retained.

This process runs in both guide rollers 23, 24 Q'nchrcn from and repeats itself accordingly after the formation of a further shrink film sleeve 43.

7804406 10/19/78

Claims (22)

Dr.-Ing. WALTER STARK PAT E N TAN WALT Moerser Strasse 140 D-4150 Krefeld 1 'S "(021 51) 28222 and 20469 S S 53 578 Date Eel Answer please indicate My reference Your reference Claims 1. Device for forming and covering a shrink film hood practice; a piece goods to be shrunk rides an unfolding device for unfolding and dividing the folded-up goods imported film tube and with Ein.tr pulling device, characterized in that the filling device (9) is arranged in the lower region of the device is and the pull-over device (22) v.Onif most eiren Support arm (27,28) for receiving the upper, unfolded The edge of the film tube (1), ν: or, ei der Support arm (27,28) is vertically movable and is suspended pivotably at least in its uppermost position. 2. Apparatus according to claim 1, characterized in that -Λ, ia.o the unfolding device (9) has two folding altars (12,13), \ the on both sides of the flat sides (2,3) of the crinkle in the! direction (9) incoming film tube (1) with these j 3outeche Bank AG Krefeld 103/1525 BLZ 320 700 80 ■ Stadt-Sparkosse Krefeld 3JE.722 ELZ320500C3 ■ Pos'.ocneck Εε ^ βη ^ CSu-Ij: BL. ^: 'Ύϋ.: Ϋ ·; 3 7804406 10/19/78 PATENT ADVOCATE DR. STARK ■ MOERSEFJ äT &. iio , 'D-415CC KREFElD · Έ ⁵ (02151) 28222 and 2C469 J ^ 65357S Flat sides (2,3) parallel pivot axis ^ arranged and which are at their ends Eafteinrichtung (16,17) to hold the film tube (1). 3. Apparatus according to claim 2, characterized in that the folding arms C ¹ 2.13) are parallel to the flat sides (2.3) when grasping the film tube (1). 4. Apparatus according to claim 2 or 3, characterized in that that the adhesive devices are designed as suction cups (1ό, 17) are. 5. Device according to one of claims 2 ice 4, characterized in that the Auffalteinrichtur.g (9) 2- .. ^r egg juxtaposed guide v / alzer. (13, V) for the incoming film tube (1). 6. Apparatus according to claim 5, -siu the swivel axes of the open: r .- -: the guide v / alsen (10,11) 2u.car.r; 7. Device according to one of claims 2 lIö c, c.! ;; -: 'indicates that the Auffaltarr.e (' 2, '.- !; ir.: ■ · ..-; ■: .-:';:. Detention facilities (16, 17) each have an xührur. - ■■ r: lie / -, have. 7804406 10/19/78 8. Device according to one of claims 2 to 7, characterized in that on the folding arms (12, 13) above the adhesive devices (16, 17) cutting devices (18, 19] are provided. 9. Device according to one of claims 2 to 8 _f daaurch that on the folding arms (12, 13) above the adhesive devices (16, 17) and possibly the Schneideinrichtur.gen (18, 19) welding devices (20, 21) are provided are. 10. Device according to one of claims 2 to 9, characterized in that the support arms (27, 28) have brackets (38, 39, 42, 47) for gripping the respective upper edge of the unfolded foil tube (1). 11. The device according to claim 10, characterized in that the brackets are designed as spring clips ^ (33, 39, 42, 47) are. 12. Apparatus according to claim 10 or 11, characterized in that the brackets (38, 39 »42, 47) such are arranged on the support arms (27, 28) that they grasp the film tube (1) in the corners. 13. Device according to one of claims 10 to 12, characterized '804406 10/19/78 - 1b - characterized in that the brackets (37, 38, 42, 47) of the support arms (27, 28) in the position when receiving the upper Stand away from the edge of the film tube (1) upwards. 14. Device according to one of claims 10 to 13, characterized in that the brackets (38, 39, 42, 47) over Spacers to maintain a distance when pulling the shrink film hood (43) connected to the piece goods (29) are. 15. The device according to claim 14, characterized in that the spacers are designed as brush strips are. 16. Device according to one of claims 1 to 15, characterized in that the support arms (27, 28) each on one Guide column (34, 24) are displaceably guided. 17. The device according to claim 16, characterized in that two guide columns (23, 24) each with a support arm (27, 28) between the unfolding device (9) and the Overtaking place for the piece goods (29) are arranged. 18. Apparatus according to claim 16 or 17, characterized in that that the support arms (27, 28) are each suspended from a pivoting device (25, 26) which is attached to the guide columns (23, 24) with a circulating chain (30, 31) 7804406 10/19/78 reversible drive motor (36, 37) can be moved up and down. 19. The device according to claim 18, characterized in that the support arms (27, 28) on the pivoting devices (25, 26) are attached via a rotatably mounted, but lockable swivel sprocket (46), which is inserted into the chain (31) intervenes. 20. The device according to claim 19, characterized in that in the Schweink devices (25, 26) below and above the swivel chain wheels (46) each have two freely rotatable guide chain wheels (44, 45) arranged between which the chain (31) the swivel sprocket (46) wrapped around ι runs. ; 21. Device according to claim 19 or 20, characterized in that that the chain (31) each engages in the swivel sprocket (46) that the support arms (27, 28) in the released state of the Swiveling chain wheel (46) pivots from the unfolding device (9) to the pull-over area when the chain strand runs downwards. 22. The device according to claim 21, characterized in that in the top dead center of the pivoting device (25, 26) a locking device for releasing the blocking of the Swivel sprocket (46) is provided. 7804406 10/19/78