DE2844374A1 - METHOD AND DEVICE FOR CLOSING VESSELS OPEN ON THE TOP - Google Patents

Description

PATENTANWA LT-D R. HERMANN O. T H. JI Ξ HL · D 1? LOMPHYSIKER D-8000 MÜNCHEN 19- F LÜGGENS TRASSE 17 -TELEPHONE: OJ & /. 1 7. Ιφή \

U 1211-D

.Register:
Ragnar Svensson,

S 523 00 Ulricehamn / Sweden

Method and device for closing vessels that are open at the top

030016/0466

Postal check account Munich No. 948 54-807 Reuschelbank Munich (BLZ 700 30300) Account No. 423.11343 Telex 5215145 Zeus Telegramrnadrosse / Cable Adrcss: Zeuspntont

PATENT ADVOCATE DR. HER MA MN O. TK. DIEHL - DI ? LO M PHYSI K ER D-8000 MÜNCHEN 19 - FLÖGGENSTRASSE 17 - TE LE FO N = 089/17 70

s. y

-Ιο 1211 -D

Applicant:

Ragnar Svensson
ülricehamn, Sweden

Method and device for closing vessels that are open at the top

The invention relates to a method for closing vessels that are open on their upper side, preferably Buckets or cans with attachment of a mounting ring to the upper edge of the container wall and insertion a cover provided with a cylindrical outer wall, as well as devices for closing such vessels.

The previously known closures from on their top open vessels, such as cans or buckets, especially for paint, where on the containers Socket rings are attached, the inner wall of which is slightly inclined to the outside for a better introduction The guarantee of the lid does not guarantee a sufficiently secure closure. Even with light impact loads, For example, in the event of a fall from a small height, the lid loosens by itself and the container

030016/0468

Postal check account Munich No. S485 <-S07 Reuschelbank Munich {BLZ70330300) Account No. 423 11343 Tolox 5215145 Zeus Telogrammodrosso / Cnblo Address: Zouspatent

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. 28U374

content can flow out. The present invention is based on the object, the requirements for a simple and cost-effective and effective closing of containers open at their top create and accidental opening of the lid as well as a resulting leakage of the container contents to prevent bumps and heavy loads on the container. According to the invention, this object is achieved in the The method mentioned at the outset is achieved in that in the cylindrical outer wall of the cover after its insertion impressions are made in the mounting ring from the inside of the lid in such a way that the impressions on the lower, preferably adjoin the edge of the mounting ring provided with a bead or come to lie under it.

The embossing will open an undesired one of the lid avoided with certainty.

With the designation "inside" in the course of this registration in each case those facing the cavity in the container or lid, based on the container or lid wall Area understood. The term "outside" refers to the container or cover wall understand opposite realms. With the designation "top" of the container that side understood that when it is filled with a flowable content and before the lid is closed is turned upside down, no matter which position this side takes after closing the lid.

It is particularly expedient if the embossments are made by a device acting perpendicularly on the side wall of the cover Nachaußenpressen be generated by at least parts of the cover. The impressions can be according to a first embodiment attached to run over the entire circumference of the cover. According to another that

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Introducing the embossment, which is particularly simple in design, the embossments are at discrete intervals introduced from each other over the circumference of the lid. This also results in an excellent hold, which prevents unwanted opening of the lid.

With regard to the stability of the connection, it is particularly advantageous if the impressions at the transition of the cylindrical Outer wall can be introduced into the bottom area of the lid. To improve the sealing effect can A sealant can be introduced between the lid and the mounting ring before the container is closed.

A particularly effective closure is obtained if the cover is provided with at least one, the cylindrical side surface delimiting the top, step-like outwardly projecting area in contact with a outwardly cantilevered shoulder of the mounting ring adjoining the cylindrical holding surface is held.

The invention also provides a device for closing vessels that are open on their upper side, preferably Buckets or cans created, with a mounting ring held on the upper edge of the container wall and one insertable into it, with a cylindrical one Outer wall provided cover, in particular for performing the above method, which thereby is characterized in that the mounting ring is one of the cylindrical side wall of the lid facing cylindrical Contains holding surface which is supported at its lower end on the container wall, and that not yet closed cover cylindrically extending to the bottom of the cover side wall of the cover from above at least one stepped outwardly projecting area is limited, the width of the cylindrical Side wall of the lid from the step-like outwardly protruding area to the bottom of the lid is larger

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- ΛΙ-is, than the width of the cylindrical holding surface of the mounting ring. By in contrast to the known devices cylindrical design of the holding surface and its support at the lower end is achieved that a tight Completion between the holding surface and the opposite cylindrical outer wall of the lid ensured remains, even if in the under the cylindrical holding surface when the lid is closed, the area protruding from the side wall is embossed. An undesirable one Pulling in the cover when attaching the embossments is made possible by the stepped area protruding outwards of the lid, which is supported on the upper edge of the holding surface of the mounting ring.

The stability of the mounting ring and thus also the engagement with the cylindrical outer wall of the cover stepping holding surface is increased in that at the lower end of the holding surface an outwardly protruding circumferential bead is attached, which reaches up to the inside of the container wall and through Rolling up the end region of the holding surface is easy to produce. The dimensional stability of the mounting ring can improve further if this has an outwardly cantilevered shoulder on the upper edge of the holding surface, which includes an acute to right angle with the adjacent upper edge of the container. This will prevents the mounting ring from being expanded and pressed outwards when the cover or the embossments are attached will, which would lead to leaks in the closure and could occur, for example, if the said angle would be greater than 90 degrees.

The mounting ring is preferably connected to the upper edge of the container by double crimping, what the stiffness of the container and thus also of the closure area is increased. The step-shaped protruding outward-

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de area of the lid that allows it to penetrate too far prevented is advantageously led continuously around the cover, which also improves the stability. To the. Bending or flanging the ^ ec> serves the same purpose: els c'rerr.alb des stufer.arrig to the outside jutting Area that is used with preference for this reason.

The cover expediently consists of a permanently deformable one, at least in the lower part of its side wall Material. If this is sheet metal, the embossments can be effected by cold working. When using Plastic materials, it is advisable to heat them up when making the embossing.

The invention provides further an apparatus for proposal, which is suitable for closing open at its top vessels, preferably buckets or cans of the type described above, by means of an insertable into a located at the upper edge of the container opening mounting ring cover having a cylindrical outer wall _/ and in particular is used to carry out the method according to the invention. The device is characterized by at least two jaws which can be introduced into the interior of the cover and are displaceable in the direction of the side wall and which carry embossing tools at their front ends or are designed as such, at least two jaws being arranged so that when they are pressed against the Side wall of the lid a force component of each jaw is directed opposite to a force component of the at least one other jaw. If a thermoplastic synthetic material is used as the material for the cover, the embossing tools are preferably heated.

The jaws and thus the embossing tools are advantageously over

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evenly distributed over the entire circumference of the lid and expediently displaceable by a common actuating device.

A punch that runs in a direction perpendicular to the plane of displacement of the jaws is particularly suitable for this purpose works. The punch is preferably connected to the jaws via levers which are hinged to each of the jaws are attached and pivotally mounted on the punch. It is particularly advantageous if the levers are at their Rounded stamp facing ends and in at least one correspondingly rounded pan-like pressure transmission element are included, which when the stamp is pushed down, the respective levers and, via this, the levers on them hinged jaws moved outwards.

A return of the jaws is expediently effected by means of at least one return spring, which is inclined in each case running groove of the lever is attached.

The stamp can advantageously be lowered to the extent that it initially loosens an introduction of the jaws into a A lid placed on a container, then a pressing of the lid into the mounting ring and after completion this process causes the jaws to be pressed apart. This is preferably done by means of a hydraulic one or pneumatic actuator.

The accompanying drawings serve to further explain the invention.

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Figures 1 and 2 show, in vertical section, two partial arrangements of preliminary stages of a mounting ring for explanation its manufacturing process.

Figure 3 shows in vertical section a partial view of the finished mounting ring.

FIG. 4 shows, in vertical section, a partial view of the mounting ring from FIG. 3 after it has been attached to the top of a bucket.

Figure 5 shows a representation corresponding to that of Figure 4 of the closed by a lid and with by means of embossings made in the lid on a bucket that was prevented from opening accidentally.

FIG. 6 shows a longitudinal extent in a front view abbreviated shown device for closing ßen of vessels by means of a mounting ring and an in this inserted cover according to FIG. 5.

FIG. 7 shows a partially sectioned vertical view on an enlarged scale of that indicated in FIG. 6 by VII Area of the device shown there, with two different embodiments in the left and in the right half are shown in different operating states.

FIG. 8 shows a partially sectioned plan view of the device shown in FIG.

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Figures 1 to 3 show different manufacturing stages of a mounting ring 1, which is formed starting from a flat, circular sheet metal disc, not shown in the drawings, by drawing and bending processes in the course of cold forming. In this case, an inner area that takes up about 2/3 of the total width of the sheet metal ring is bent downwards. Here, care is taken that the first piece 3 adjoining the remaining ring part 2 runs bent downwards at right angles to the ring part 2. This is followed _by a at an angle of approximately 45 extending inwardly piece. 4 _D i _e lengths of the pieces 3 and are about the same and are each somewhat smaller than about 1/6 of the entire width of the sheet metal ring. The obliquely inwardly extending piece 4 is adjoined by a part 5 extending vertically downward to the ring part 2, the lower end 6 of which, as shown in FIG. 2, is widened outward. The ring, which is still very unstable in FIG. 1, is given a certain dimensional stability as a result.

In a further processing step the one shown in FIG Final shape of the mounting ring 1 produced. Here, on the one hand, the outer edge of what has just remained Ring part 2, as indicated by the reference 7, bent downwards. Simultaneously with this there is a compression of the ring, which causes the first at an angle of 45 to the adjacent Sheet metal parts 3 and 5 extending piece 4 now runs approximately perpendicular to these. To this Way is created around the mounting ring circumferential paragraph 8. Simultaneously with this procedure, the Expansion 6 rolled into a bead 9. The bead is dimensioned such that it is after a

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Inserting the mounting ring 1 in an open-topped bucket, of which only the wall 10 is shown in Fig. 4, which is supported under the end of the mounting ring 1 on the inside of the wall such that the support surface formed by the rest of the part 5, 11, a cylindrical in the example shown, a circular cylindrical opening is formed.

The mounting ring 1 is fastened to the edge of the bucket by placing it on and then flanging it over twice, as shown in the section of FIG. The piece 3 of the mounting ring is pressed against the inside of the handle 10.

After the bucket has been provided with the mounting ring in the manner described above, and optionally after filling the bucket with its contents, e.g. B. with paint, a cover 12 is inserted into the mounting ring 1.

The cover 12 consists of a substantially planar bottom portion 13 and one of this before the insertion and sealing of the lid as indicated by the hatching in Fig., Vertically upstanding cylindrical side wall 14. The cylindrical side wall 14 is the top of a the lid 12 encompassing, step en- shaped outwardly projecting area 15 , which is followed by an outwardly downwardly bent or rolled grip edge 16, which extends over the double- crimped part of the mounting ring .

The outside diameter of the cylindrical side wall 1 4 corresponds to the inside diameter of the part of the mounting ring 1 designed as a holding surface 1 1. The width b. the cylindrical side wall 14 is greater than the width b ~

of the holding surface 11. The step-shaped outwardly protruding area 15 is dimensioned such that it is delimited by the holding surface 11 when the cover 12 is inserted

030016/046 $

Of f nüfrig ^ in ZÜsäitmenwohleri'mii: 'the "paragraph' 8 a stop forms / which prevents the cover 12 from being pushed in further. Between the half: "11 and the cylindrical Sidewall "T4 can, as indicated by the 'reference number 17 indicated, a "Abdic'htmittel" be introduced.

As soon as the cover 12 is completely in the from the holding surface limited opening of the Fassüngsring is used, are down in the cylindrical side wall 14 and that of inside, impressions 18a, 18b, 18c, ... attached, which permanently deform the material of the lid in such a way that it As indicated by the reference numeral 19, radially bulging. Due to the wider configuration of the cylindrical side wall compared to the holding surface 11 it is achieved that the impressions come to lie under the lower edge of the mounting ring 1, in the illustrated Trap directly adjacent to the bead 9. This prevents that when the embossments are made Bracket ring itself bent, and thus the sealing effect between the holding surface 11 and the cylindrical Side wall 14 is disturbed.

030016/0466

INSPECTSD

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The above-described operation of closing and the same for carrying out serving device are explained ^L below with reference to Figures 5 to 8 in more detail. ^ ¹ -The device for closing the container shown in Fig. 6 with 8 contains a base plate 20. S, columns 21 and "^; 22 are supported on the base plate 20 and carry a guide plate 23. Above the guide plate 23 are further columns 24 and 25, which carry a mounting plate 26. In the middle of the mounting plate 26, a merely schematically indicated source 27 for a pressure fluid is mounted, which a double-acting piston accommodated between the guide plate 23 and the mounting plate 26 in a housing 29 via a A hydraulic or pneumatic pressurized fluid is applied to line 29. The movement of the piston is effected in a manner not shown in greater detail, which is known per se, by control lines and valves provided in the housing 29. The piston actuates a plunger 30, which, via guide rods 31a and 31b, raises or lowers a locking and embossing head in the direction of arrow 33. With is a cover of the stamp 30 designated. ^;

The closure and embossing head 32 contains a massive Support plate 35 with a central bore in which a guide sleeve 37 is received. In the guide sleeve -

37, the punch 30 is slidably guided. Laterally through bores made on the support plate 35

38 and 39 allow the support plate to be displaced ^; 35 along the guide _{rods 31a and 31b f,} the support plate being prevented from sliding out of these guide rods by nuts 40 and 41 screwed onto their ends. A pipe section 52 is attached to the underside of the guide plate 35 and centrically to the central bore 37, in the illustrated case by welding.

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The length of the pipe section 42 corresponds approximately to the lifting height of the lifting and lowering movement carried out by the sealing and embossing head 3 2. At the lower end of the pipe section 42 an annular plate 4'3f is attached, in the case shown, also by welding. The plate 43 is sunk into the surface of a block 44, the side wall of which is flush with the edge of the plate 43. The plate 43 and the block 44 are connected with screws 45 and 46 which penetrate the plate 43. The block 44 contains a central bore 47 in which an extension 30a of the punch 30 is slidably displaceable. The extension 30a of the stamp is indicated thereon by means of a reference symbol 30b. Threaded connection screwed on, a disk 48 being held between the two parts, the diameter of which is greater than the diameter of the central bore 47. A corresponding disk 49 is attached to the lower end of the extension 30a. During the downward movement of the punch 30, the disk 48 comes to rest on the upper side of the block 44, or on the bottom of a recess provided for this purpose, and when the punch 30 moves further down, it presses the block 4'4 downwards The state is shown in the right part of FIG. Conversely, when the punch 30 is raised, the disk 49 attached to the lower end of the extension 30a comes into contact with the underside of the block 44, which is provided with a topfarti recess in this area, and also lifts it. This state is shown in the left part of FIG.

The block 44 contains in its lower region an annular disk-like extension 50, the diameter of which in about that. Outside diameter of one only schematically

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indicated cover 51 corresponds, with which a vessel, for example a bucket according to FIG. 5 is to be closed with the aid of this device. On the bottom of the annular disc-like extension 50 is a series of jaws 52a, 52b, 52c ... in a perpendicular to the longitudinal axis of the stamp extending plane arranged displaceably in the radial direction. In the right part of Fig.7 The embodiment shown is the jaw 52e on its outwardly directed front side in the lower area as Embossing tool formed. For this purpose, it contains a corresponding cutting edge-like projection 53, which corresponds to the contour of the lid is shaped. When the jaw is displaced outwards, the projection 53 is produced, as in the right-hand part 7, an indentation 54 is shown in the side wall of the cover 51.

The jaw 52a shown in the left part of FIG. 7 carries an embossing tool at its outwardly facing end 55, which by means of a countersunk screw 56 and two guide pins 57 and 58 with the jaw 52a is releasably connected. This embodiment has the advantage that the embossing tools which are subject to wear are interchangeable without affecting the jaws themselves. The cheeks are star-shaped arranged at equal angular distances from one another around the longitudinal axis of the punch 30, which is best shown in FIG. The jaws are beveled at their rear ends so that a closer packing is possible.

The guidance of the jaws and their holder in contact with the underside of the disk-like extension 50 takes place by screws 59 and 60, which extend parallel to the jaw center axis and penetrate the shoulder 50 Elongated holes 61 are guided and from the top of the projection 50 to in from the top of the jaws vertically downwardly extending threaded bores 62 are sufficient. The danger

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tilting of the jaws during their longitudinal displacement is caused by the use of on the top of the approach 50 arranged plate-shaped spacers 63 prevented, which in a defined Distance from one another each contain a bore for the two screws 59 and 60 assigned to each jaw. The spacers simultaneously protect the elongated holes 61 against the occurrence of Impurities.

The jaws each contain a slot-like recess 64 in the middle of their rear area. The recess 6 4 is penetrated at its end facing the front of the jaw by a pivot pin 66, which is received in a through bore 65 extending transversely through the jaws. The through hole 65 is as can be seen in particular from FIG. 8, arranged in such a way that the bores 62 for the screws 59 and 60 open out, which in this way prevent the pivot pins 66 from slipping sideways.

Levers 67a, 67b,... _M whose width corresponds to the recess 64, are pivotably mounted on the pivot pin 66. As can be seen in particular from FIG. 8, the levers run radially towards the longitudinal axis of the punch 30. At their inner ends, the levers 65a ... are provided with rounded heads, which are received in a correspondingly shaped pan-like pressure transmission element 69. The pan-like pressure transmission element 69 consists of a ring made of a resistant, wear-resistant material and held on the underside of the extension 30a of the punch 30 below the disk 49. The levers 67a.

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depends on which lever is in contact with the pressure transmission element 69 holds.

The length of the lever 67a .... is set such that it when the punch 30 is completely lowered and the disc 48 is in contact with the top of the block 44 are arranged essentially horizontally, i.e. in alignment with the direction of displacement of the jaws, as this is shown in the right part of FIG. When the jaws are retracted, the ends are turned inward the lever is raised slightly, as shown in the left part of FIG.

Numeral 72 is an outer cover of the closure and embossing head 32 designated.

During the operation of the device, a vessel to be closed and provided with a mounting ring is placed on the Base plate 20 is arranged so that its central axis is aligned with the longitudinal axis of the device, i.e. the punch 30. A lid is then placed on the mounting ring of the container. The piston is then filled with a pressurized fluid applied and the punch 30 lowered. Here, the closure and embossing head 32 is inserted into the interior of the lid, until it rests against the bottom. With a further downward displacement of the ram 30 pushes the locking and embossing head the lid into the mounting ring until the lid with the step-shaped after outside protruding area 15 rests against paragraph 8. A further downward displacement of the punch 30 causes A displacement via the extension 30a, the pressure transmission element 69 and the rounded heads 68 of the levers 67a same, so that the jaws and the embossing tools attached to their ends are moved outwards. After completion of the embossing process causes the stamp 30 to be raised

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Withdrawal of the jaws and the stamping tools attached to them, whereby as soon as the disc 49 on the The bottom of the block 44 rests, the locking and embossing head 32 from the lid of the closed Container is raised. During this process, the spring 70 prevents the heads 68 of the levers from the pan-like pressure transmission element 69 fall out.

In the example shown, a device with eight jaws was described. It goes without saying, however also possible, the device in a corresponding manner, but with a different number of Design baking. The drive of the ram does not necessarily have to be hydraulic or pneumatic take place. It can also be brought about by any mechanical drive device.

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Claims (21)

Claims 1.J method of sealing at their top open vessels, preferably buckets or cans, with a mounting ring attached to the upper edge of the Container wall and insertion of a lid provided with a cylindrical outer wall, characterized in that that in the cylindrical outer wall of the lid, after its insertion into the mounting ring, from the inside of the lid from embossments are introduced in such a way that the embossments on the lower, preferably with a bead border the provided edge of the mounting ring, or come to lie below this. 2. The method according to claim 1, characterized in that that the impressions are made by pressing outwards from the side wall of the cover at right angles at least parts of the same are generated. 3. The method according to any one of the preceding claims, characterized in that the impressions on the The entire circumference of the cover can be attached in a running manner. 4. The method according to any one of claims 1 or 2, characterized gekennaeichnet that the impressions are made at discrete distances from one another over the circumference of the cover. 030016/0480 ü 1211-D / S. £ 5. The method according to any one of the preceding claims, characterized characterized in that the impressions at the transition from the cylindrical outer wall to the bottom area of the lid be introduced. 6. The method according to any one of the preceding claims, characterized in that before the introduction of the lid a sealant is introduced between the mounting ring and the cover. 7. The method according to any one of the preceding claims, characterized in that the lid when introducing the Embossings with at least one, the cylindrical side surface at the top delimiting, step-like outwardly projecting area in contact with an outwardly cantilevered, the shoulder of the mounting ring adjoining the cylindrical holding surface is held. 8. Device for closing vessels open at their top, preferably buckets or cans, with a Mounted on the upper edge of the container wall and a holder ring that can be inserted into it, with a cylindrical one Cover provided with an outer wall, in particular for carrying out a method according to one of Claims 1 to 7, thereby characterized in that the mounting ring (1) has a cylindrical side wall (14) of the cover (12) facing it Holding surface (11) which is supported at its lower end on the container wall (10), and that the at -D / S. j ( "*" 28U374 not yet closed lid cylindrical to the bottom of the lid extending side wall (14) of the lid at the top of at least one stepped, outwardly protruding Area (15) is limited, the width (b ..) of the cylindrical side wall (14) of the lid of the step-like outwardly projecting area to the bottom of the lid is greater than the width (b_) of the cylindrical Holding surface (11) of the mounting ring (1). 9. Apparatus according to claim 8, characterized in that at the lower end of the holding surface (11) one to the outside protruding, circumferential bead (9) is attached, which reaches up to the 'inside of the container wall (10). 10. Apparatus according to claim 8 or 9, characterized in that that the mounting ring (1) on the upper edge of the holding surface (11) contains an outwardly cantilevered shoulder (8), which includes an acute to right angle with the adjacent upper edge of the container (10). 11 «, device according to one of claims 8 to 10, characterized characterized in that the mounting ring (1) with the upper edge of the container (10) by double flanging connected is. 030018/0468 U 1211-D / p. 4 12. Device according to one of claims 8 to 11, characterized characterized in that the step-shaped outwardly protruding area (15) of the cover is continuous around it shows around. 13. Device according to one of claims 8 to 11, characterized in that the cover is above the step-shaped outwardly protruding area is bent or crimped. 14. Device according to one of claims 8 to 12, characterized characterized in that the cover (12) at least in the lower part of its side wall (14) consists of a permanent deformable material. 15. Device for closing at its top open vessels, preferably buckets or cans, by means of an in one at the upper edge of the container opening fastened mounting ring insertable cover with cylindrical outer wall, preferably according to one of the claims 8 to 14 and in particular to carry out a Method according to one of claims 1 to 8, characterized by at least two that can be introduced into the interior of the lid, in the direction of its side wall movable jaws (52 a, ...) at their front ends Embossing tools (53) wear (Fig. 7, right), or as 030016/0466 -S- such are formed (Fig. 7, left), with at least zv / egg jaws are arranged in such a way that in one Pressing the same against the side wall of the lid a force component of each jaw, a force component of at least one other jaw is opposite. 16. The device according to claim 14, characterized in that that the jaws (52a ...) are evenly distributed over the entire circumference of the lid and / or in a common Plane of an actuating device (30) are displaceable. 17. Apparatus according to claim 15 or 16, characterized in that that the jaws can be actuated in a common plane by one perpendicular to their direction of displacement Stamp (30) are displaceable. 18. The device according to claim 17, characterized in that that the stamp is connected to the jaws (52a, ...) via levers (67a ...) which are articulated on each the jaws are attached and pivotally mounted on the Stemepl (30). 19. The device according to claim 18, characterized in that that the levers (67a, ...) are rounded at their ends (68) facing the punch (30) and in at least one correspondingly rounded, pan-like pressure transmission 030016 / tUßß U 1211-D / S. element are added, which when the ram (30) is pushed down the respective lever and about this, which moves outward on these hinged jaws. 20. Device according to one of claims 15 to 19, characterized by at least one return spring (71), each engages in a groove (70) of the lever (67a, ...). 21. Device according to one of claims 17 to 19, characterized in that the punch (30) can be lowered to such an extent that it first introduces the jaws (52a, ...) in a loose lid (51) placed on a container, then pressing in the lid into the mounting ring, and after completion of this process causes the jaws to be pressed apart. 030018/0458