DE2511218A1 - DEVICE FOR CLOSING A CONTAINER PROVIDED WITH A HORIZONTAL EDGE STRIP WITH A LID - Google Patents

Description

aelder: Hunter Douglas International N.V. ^

Handelskade 8, Willemstadt, Curacao / Netherl. Antilles

Device for closing a container provided with a horizontal edge strip with a lid »

The invention relates to a device for closing a container provided with a horizontal edge strip with a cover made of plastically deformable material, in particular one formed from thin film Container with a lid made of film, with a support plate for the container and the one placed on it Lid with an upper punch that can be moved vertically with respect to the support plate and that can be lowered down to the lid and its edge as in the lowered position the edge strips of the container on the sides overlapping pressure frames is formed, and with a lower ram which can be moved vertically with respect to the support plate and which, after lowering of the upper punch is raised and is provided with guides for bending the downward-facing edge of the lid, through which the lid edge is bent in the direction of the underside of the container edge strip, and then through the lower punch to be pressed against the underside.

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In a known device of this type, the number is 95 1 1218 Lower punch made in two parts. Both stamp parts are telescopically arranged one inside the other and each for can be moved, the outer punch part having the guides for bending the edge of the lid.

This device has several disadvantages, one of which is that it is telescopic against each other movable stamp parts have a relatively high precision and a correspondingly high level of technical effort The drive is also difficult for these reasons. Since both stamp parts only in the vertical direction are movable and their area of action is essentially below the edge strip of the container, must Guide surfaces of the outer punch part are dimensioned very precisely and the vertical adjustment movement is guided very precisely be to with at least reasonably sufficient security the already bent approximately vertically downwards To grasp the edge of the lid in such a way that it is actually bent inwards and not pushed outwards and gets squashed.

In this context, it is disadvantageous that the inclined guide surfaces of the outer punch part of the Lower punch can in no case cause such a good guide for the lid edge that the distance between the outer edge de3 edge strip of the container or the beginning of the lid edge on the one hand and the inside of the

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On the other hand, marginal strips overlapping frame are not so can be made large, as is appropriate for an absolutely secure gripping of the downwardly bent lid edge /were ·

It is known in another type of device to move a closed frame to below the edge strip of the container exs in a horizontal direction of movement possible compared to the container cross-section · The frame is moved horizontally so that it engages one after the other on the 4 individual sides of the container and thereby bends the edge of the lid downwards side by side «

This device requires to control the frame movement in the horizontal direction a very complex drive with -.complicatedly arranged control surfaces, due to this Set up the device only for manual operation or for one very slowly operating machine drive is applicable

Proceeding from this, the invention was based on the object

to improve a device of the type mentioned at the outset in such a way that the necessary for bending over the lid edge Movement sections can be carried out quickly and with much simpler means, while at the same time an optimal puncture iciißrheitg should be guaranteed.

To solve this problem, the ' initially mentioned type proposed according to the invention that the pressure frame assigned to the upper punch into several frame parts that can be moved horizontally in the direction of the container is divided.

Such a design creates the advantage that the cover, which is bent approximately vertically downwards, is rand when bending back under the underside of the edge strip of the container can be absolutely safely grasp and guide. It a sufficiently large distance between the inside of the frame parts and the lid edge can also be maintained. The drive means required to move the frame parts can be provided in a simple manner The advantage arises in the form of a simpler design of the lower ram, which now only consists of a moving part needs. Special requirements for the manufacturing effort and the accuracy as with a two-part lower punch no longer exist. It can also be a fast operation of the device and thus a good Throughput: achieve.

Some advantageous embodiments of the invention are described below, one of which is that the frame parts are measured in such a way that they are at a certain distance from one another in the rest position and that springs are arranged between the ends of the frame parts pushing them back into the rest position ".

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ie shifting the frame parts inwards can It is carried out by a drive that moves it inwards against the spring force, while after switching off he driving force the original rest position is reached again automatically.

The frame parts should also be dimensioned so that in working position the same between. their ^: r inside and. A space remains free for the wall of the container, through which the lower punch can reach the underside of the bent edge of the lid.

e bending the edge of the lid to the underside of the Beilter Edge strip, it is also favorable if the frame parts on their upper inner edge with an inward and -it inclined guide surfaces are provided. This can be useful be formed by an open groove, the wall of which is curved inside.

.ne advantageous embodiment of the invention is * given, In the upper stamp one opposite this vertically freely honored and movable middle part, the shape of which corresponds to the rm of the container top and which is in the er end position of the upper punch between the frame parts

finds, and if the vertical mobility of the middle part is large, that this is in the lower end position i upper punch rests on the lid and the container with its weight and the frame parts below the middle Is a piece after ιΆηίη verscW, e.bbo,> are. When lifting the

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Upper punch, the middle part remains on the container until the frame parts have reached the height of the middle part; only then is the latter taken upstairs.

It is also advantageous if the underside of the middle part at its edge with an outwardly and downwardly inclined Inclined surface is provided and if the upper edge of the lower punch is a corrosponding with this inclined surface ' Bevel on v / eist.

The upper punch is advantageous with U-shaped inside Provided open guides, in.-d-enen the frame parts can be moved These guides do not need to extend over the entire length of the side; it is sufficient to if they grasp the ends of the frame parts in the middle side area ..

An advantageous embodiment for the drive of the frame parts is given if they are provided with rollers rotatable about horizontal axes and if the displacement of the frame parts inward takes place by means of drive pins that can be moved in the vertical direction and engage the rollers. The drive pins can then namely be connected to the lower punch and can be moved together with it, so that an additional drive for the frame parts is not necessary at all. The time at which the frame parts are shifted inwards can be specified by appropriately dimensioning the length of the drive pin, which means that it is coordinated with the beginning of the following work segment a,

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namely the pressing of the bent lid edge from below against the edge strip of the container, in a simple way Way is possible.

The invention is basically for "any container shape Applicable With a round container, e.g. two or three frame parts in the shape of a sector of a circle can be used that attack the container circumference • evenly.

• ■ ■ _ \

A corresponding adaptation of the proposed device is also possible for any polygonal cross-sectional shape of the container possible; the measures specified below for a square container then apply accordingly.

In the latter, namely, 4 angular frame parts with 2 legs at right angles to each other can be provided, the axes of a roller each being arranged at an angle of 45 ° to the two legs on the outside of the frame corner formed by the legs. When a drive pin engages, each frame part is then displaced at an angle of 45 ° to the container sides in the direction of the latter, so that both legs approach the container wall assigned to them.

Furthermore, it is proposed according to the invention that the lower punch and the drive pin is placed on a base plate that can be moved vertically with respect to a machine table and that the base plate is placed on the machine table vertical guide rods that slide the base plate 'enforce and at the upper ends of the support plate is attached. Here, the guide rods can be at their lower ends be detachably screwed to the machine table, so that a

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easy replacement, e.g. for cleaning purposes, is possible. ·

In the following some measures are suggested for the formation of the drive of the lower punch and the upper punch are cheap. One of these measures is that as a drive for the lower punch a below the Machine table attached piston-cylinder arrangement is used, the moving part of which penetrates the machine table and on Attacks lower punch. · -'- "'',

The upper punch is expediently held on a traverse that runs next to the upper punch and the lower punch Supports drive rods, the drive rods penetrate the machine table and are guided on this. At least one can be used as a drive for the upper punch The underside of the machine table serves indirectly or directly in a vertical position attached piston-cylinder arrangement, the moving part of which is connected to the drive rods via a further cross member.

An exemplary embodiment of the invention is described in more detail below with reference to a drawing. Show in detail:

Figure 1 is a vertical section through the device, wherein

< in the left half of the illustration the upper punch is raised and the lower punch is lowered, while in the right half of the illustration the upper punch is lowered and the lower punch is raised;

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Figure 2 is a side view of the device, seen in a direction rotated by 90 °, where de at the top and the lower punch lowered

direction rotated by 9o, whereby the upper punch is

λ a machine table (1o) are in cylindrical sleeves 1) two drive rods'O 2) out, which are connected at their upper .iden by a cross member (13). The latter protrudes an upper punch (14) with 4 frame parts (15) and a lower part (16) With the help of pins (17) guided in corresponding bores and a central spindle (18), the lower part (16) is attached to the upper punch (14) ) movably guided, whereby

rch die ^ pinde ^ ie) the height of the middle part (14) at the specified Upper punch (14) can be adjusted so that the middle part (14) is at approximately the same height as the frame parts } is located

The upper punch (14) has U-shaped jibs (19) on its underside, in whose inwardly open? Groove the frame _{/ y} line (15) are held displaceably in the horizontal direction.

3 guides (19) only extend over the central area ? respective frame side, which can be seen in FIG.

Two adjacent frame parts (15) are supported horizontally ; hter direction against each other via springs (2o), which'an the are held on the inside of the frame parts (15) and press them together as far as the guides (19) allow, The upper inner edge of the frame parts (15) has a groove (21) whose cross-section is approximately the shape of a quarter circle and > n rounded wall serves as a guide surface.

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.two guide rods (22) are placed on the machine table (1o), which are each held in a base (23). A union nut (24) is screwed onto the latter _nschlagring engages over the guide rod (22) and after it .loosen the guide rod (22) can be removed.

At the upper end of both guide rods (22) a support plate (25) adapted to the container is attached, onto each of which a container (26) is placed. ? The latter consists of aluminum foil .- id is provided with a horizontal edge strip (26a) provided ·;. XZ the container (26) is a cover hook (27) loosely, the ebenalls made of aluminum foil and an already in vertical ichtung by bent-down edge of the cover (27a).

.af a base plate (28) is a lower punch (29) is placed, ■ nc is formed so that its shape of andstreifens (26a) corresponding to the inner area on the entire periphery of the container. The under-,. The punch (29) has an outward and downward sloping inclined surface (29a), - • --r corresponds to an outward and downward inclined inclined surface on the edge of the central part (16). The base plate (28) is guided in sleeves (3o) on the Jirungsstangen (22) and is carried by the movable part (31a) of a piston-cylinder arrangement (31), which has the shape of a hollow piston and in a vertical direction in.: a fixed part (31b) of the piston-cylinder arrangement (31) can eiten. On the upper side of the movable part (31a) there is a central retaining pin (32 ^ on which the base plate (28) is inserted so that the upper side of the movable part (31a) serves the support surface. The retaining pin (32) is on its upper ie provided with an annular groove (32a), which together with a

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: The slide (33) acts like a bayonet lock; by sliding it in the horizontal direction, the slide 33) can be released from the annular groove (32; so that after loosening the union nuts (24) the base plate (28), the support plate (25 ). And the parts connected to these can be pulled off upwards : can.

ie frame parts) 15) each have a role at their "corners" 34), whose axis (35) to the two legs of each frame part (15) forms an angle of 45 ° (Figure 2). In a position corresponding to the age of the roles (34) are on the ground. lath (28) four vertical drive pins (36) placed on them · These taper at their upper end while he running surfaces of the rollers (34) of the rounding of the drive pin (36) are fitted *

The drive rods (12) are connected at their lower end by a further horizontal crossbar (37) on which the movable .chen Parts (38a) of two piston-cylinder arrangements (38) are

hinentisch.es (1o), with their fixed parts 8b) each in the form of ^a cylinder attached to the underside of the mowing table (1o) · The moving parts (38a) and here piston rods.

Lde piston-cylinder arrangements (31 and 38) are expediently designed. "Compressed air operation. Of course, there are also hydraulic ; other drives are conceivable.

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AFTERGER CALIBRATED

V / ie also recognizable from FIG. 2 are on the machine table (1o) in a continuous transport direction in front of and behind the device described two Arranged transport tracks (39), which are composed of several horizontal rods (39a) and with the help of Support vertical feet (39b) on the machine table (1o).

For the sliding of the frame parts (15), it is also advantageous if these are made of plastic, while their- "guides

(19) are made of metal, e.g. aluminum or steel. The weight of the middle part (16). is dimensioned so that it can be received by the container (26) without deformation and that nevertheless upwardly protruding parts of the goods filled into the container (26) - these are mostly ready-made To be food - to be pressed down.

The device described works as follows:

While the upper punch (14) and the lower punch (29) are still in the rest position shown in the left part of FIG. the container (26) with the lid (27) in place is pushed from the transport path (39) onto the support plate (29), whereby it assumes a predetermined position with the help of the bent-up edges of the support plate (25). E3 then become the two piston-cylinder arrangements (38) applied in such a way that aich the

! '' guide (22) and with which the upper atmospheric pole (14) is lowered. As soon as the middle part (16) comes to rest on the cover (27), the middle part (16) remains at this height while. Lower the frame parts (15) further, bia they are in a horizontal position

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Release the direction from the middle part (16).

The inner sides of the frame parts (15) take the edge of the lid (27) with them to such an extent that it extends in a vertical direction is bent.

The piston-cylinder arrangement (31) is then instructed in such a way that the base plate (28) is raised.The length of the drive pins (36) is dimensioned so that they engage the rollers (34) and the frame parts (15 ) move inwards * ¹ before the lower punch (29) with its inclined surface (29a) can take effect.

When the frame parts (15) move inwards, the lid edge (27a) is inserted into the groove (21), so that an overly sharp kinks in the cover film at this point are avoided. The lid edge (27a) is now bent back on the underside of the edge strip (26a) in an approximately horizontal direction, and at this moment the base plate (28) has come up so far that it firmly attaches the cover edge (27a) to the edge strips (26a) from below.

In the last-mentioned pressing process, the lower punch presses

s
29) with its inclined surface (29a) against the corresponding inclined surface on the lower edge of the middle part (16), whereby the film material can be pressed together so tightly that it is also stretched a little if necessary.

) The closing process is now complete. With appropriate admission of the piston-cylinder arrangements (31 and 38) are lowered and the base plate (27) with the lower punch (29) r upper punch (14) raised so that the container (26) on

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the exit-side transport path (39) can be moved.

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AS

B E ZU G S Z Π P E E I I S I Ε ·

Mas chinentis ch. Sleeve drive rod transverse traverse upper punch frame part middle part 16a inclined surface pin i spindle guide tongue groove

Guide rod Socket Union nut Support plate Container edge strip lid lid edge base plate lower punch sloping surface sleeve Piston-cylinder assembly part

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32 retaining pin 32ä ring groove

33 slider

34 role

35 axis

36 drive journals,

37 cross beam

38 Piston-cylinder arrangement 38a part 38b part

39 conveyor track 39a rod 39b foot

Claims (1)

EXPECTATIONS
1. Device for closing a container provided with a horizontal edge strip with a cover made of plastically deformable material, in particular a container made of thin film with a cover made of film, with a support plate for the container and the cover placed on it, with an opposite the support plate vertically movable upper punch, which can be lowered to the lid and the edge of which is designed as a pressure frame that overlaps the edge strip of the container on the side in the lowered position, with a lower punch that can be moved vertically with respect to the carrier plate and is raised after the upper punch has dropped , and with guides for deflecting the downwardly pointing lid edge, through which the lid edge is bent in the direction of the underside of the container edge strip in order to then be pressed against the underside by the lower stamp, characterized in that the pressure frame is divided into several, horizontally in Ric Attention is divided on the container (26) displaceable frame parts (15). 2 »Device according to claim 1, characterized in that the Frame parts (15) are dimensioned so that they are a certain distance in the horizontal direction from each other in the rest position have, and that on the frame parts (15) these springs (2o) pressing into the rest position attack. 5. Device according to claim 2, characterized in that the ends of the Ralimcnteile (15) are supported on one another via the springs (2o). 609839/01 66 Device according to one of the preceding claims, characterized in that the frame parts (15) are dimensioned in such a way that that in the working position - the same between their inside and the container wall a space remains free through which the lower punch (29) to the underside of the bent lid edge ( 27a) approach » Device according to one of the previous claims, characterized in that that the frame parts (15) on their upper inner edge with an inwardly and downwardly inclined guide surface (21) are provided. ^{) e} device according to claim 5, characterized in that the guide surface is formed by an open groove (21), the wall of which is curved. Device according to one of the preceding claims, characterized in that that the upper punch (14) has a vertically freely guided and movable central part (16) relative to it has, the shape of which corresponds to the shape of the container top and which is in the upper end position of the upper punch (14) is located between the frame parts (15), and that the vertical mobility of the central part (16) is so large is that this is in the lower end position of the upper punch (14) on the lid (27) and the container (26) rests with its own weight and the frame parts (15) below 'the middle part (16) can be displaced a little inwards are. 609839/0166 8, device according to claim 7, characterized in that the underside of the middle part (16) is provided at its edge with an outwardly and downwardly inclined sloping surface (i6a) is and that the upper edge of the TJnterstempel (29) with a this inclined surface has corrosponding inclined surface (29a). 9. Device according to one of the preceding claims, characterized in that that the upper punch (14-) U-shaped inwards has open guides (19) in which the frame parts (15) are held displaceably ο · Device according to one of the preceding claims, characterized in that the frame parts (15) are provided with rollers (3A-) which can be rotated about horizontal axes (35) and that the displacement of the frame parts (15) inwardly by means of vertically movable on the rollers (34) engaging drive pin (36) takes place. . Device according to claim 1o, characterized in that the Drive pin (36) connected to the TJnterstempel (29) and with this are movable. 2. Device according to claim 11, characterized in that the start of time for the displacement of the frame parts <£ 15) inwardly by dimensioning the length of the drive pin (36) accordingly. 609839/0166 Device according to one of claims 1o - 12 for one
square container, characterized in that four
angular frame parts (15) each having two legs at right angles to one another are provided
and that the axis (35) of a roller (34) is arranged at an angle of 45 ° to both legs on the outside of the frame corner formed by the legs. Device according to one of the preceding claims, characterized in that the lower punch (29) and the drive pin (36) are positioned opposite a machine table (1o)
vertically movable base plate (28) on vertical guide rods (22) placed on the lashing table (1o)
slides which pass through the base plate (28) and at the upper ends of which the support plate (25) is attached. Device according to claim 14, characterized in that the guide rods (22) at their lower end with the machine table (1o) are releasably connected. »Device according to one of the preceding claims, characterized in that that as a drive for the lower punch (29) a piston-cylinder- Arrangement (31) is used whose movable part (31a) de'n machine table (1o) penetrates and attacks the lower die (28,29). 609839/0166 17. The device according to claim 16, characterized in that the upper side of the movable part (31a) of the piston-cylinder arrangement (31) a central retaining pin (32) and a supporting surface surrounding this for the lower punch (29) or the base plate ('28) and that the retaining pin (32) penetrates this and at its upper end with a detachable holder (32,33) is provided. 18. The device according to claim 17, characterized in; - * that the holder by an annular groove (32a) and a slide (33) engaging in this in the manner of a bayonet lock is formed. 19. Device according to one of the preceding claims, characterized in that that the upper punch (14) is held on a cross member (13), which is located next to the upper punch (14) and the The lower punch (29) is supported by the drive rods (12) and that the drive rods (12) penetrate the machine table (io) and are guided by this. 3o. Device according to claim 19, characterized in that as a drive for the upper punch (14) at least one on the underside of the first machine table (1o) directly or indirectly The piston-cylinder arrangement (38), which is fastened in a vertical position, is used, the movable part (38a) of which via a further cross-member (37) is connected to the drive rods (12). 609839/0 166