LU81721A1 - METHOD AND DEVICE FOR CLOSING VESSELS OPEN ON THE TOP - Google Patents

Description

Applicant:

Ragnar Svensson Ulricehamn, Sweden t

Method and device for closing vessels open at the top -; : ·. ·

The invention relates to a method for closing open-top vessels, preferably buckets or cans by attaching a mounting ring to the upper edge of the container wall and inserting a lid provided with a cylindrical outer wall, and devices for closing such vessels.

The hitherto known closures of vessels open at the top, such as cans or buckets, in particular for paint, in which mounting rings are attached to the containers, the inner wall of which slopes slightly outwards in order to ensure a better insertion of the lid, do not guarantee ''. sufficiently secure closure. Even with slight impact loads, for example in the case of a fall from a low height, the lid loosens itself and the container * *! ’'. .:: ~ ’-! '· ··.

* - *: · z content can flow out. The present invention has for its object to provide the prerequisites for a simple and inexpensive to carry out and effective closing of open containers on the top and an accidental opening of the lid and a resulting leakage of the contents of the container, even in the event of impacts and gross stresses on the container prevent. This object is achieved in the above-mentioned method in that impressions are attached to the cylindrical outer wall of the cover after it has been inserted into the mounting ring from the inside of the cover in such a way that the impressions on the lower, v; · '·. · Preferably border or come to rest with a beaded rim of the mounting ring.

Undesired opening of the cover is avoided with certainty by the impressions.

In the course of this application, the designation "inside" refers to the container or

Cover wall understood the cavity in the container or cover area. The designation "outside" means the areas opposite in relation to the wall of the container or ceiling. The term "top" of the container is understood to mean that side which, when the container is filled with a flowable content and has turned upwards before the lid is closed, regardless of the position of this side after the lid has been closed.

It is particularly expedient if the embossments are produced by at least parts of the cover being pressed outwards, acting vertically on the side wall of the cover. According to a first embodiment, the embossments can be applied running over the entire circumference of the cover. According to another that

Introducing the embossing in a particularly simple way

Embodiments are in discrete imprints; . fl ...

were introduced from each other over the circumference of the lid. Here, too, there is an excellent hold which prevents the lid from being opened undesirably.

With regard to the stability of the connection, it is particularly advantageous if the impressions at the transition of the cylindrical outer wall are introduced into the base region of the cover. To improve the sealing effect, a sealant can be introduced between the cover and the mounting ring before the container is closed.

A particularly effective closure is obtained if the cover is held in contact with an outwardly projecting shoulder of the mounting ring adjacent to the cylindrical holding surface during the introduction of the impressions with at least one area which delimits the cylindrical side surface at the top and which projects outward in steps.

The invention also provides a device for closing vessels, preferably buckets or cans, which are open at the top, with a mounting ring held on the upper edge of the container wall and a lid which can be inserted therein and has a cylindrical outer wall, in particular for · .- ·

Implementation of the above method, which is characterized in that the mounting ring is a cylindrical side facing the cylindrical side wall of the cover

Containing surface, which is supported at its lower end on the container wall, and that when the lid is not yet closed, cylindrical to the bottom of the

Lid-extending side wall of the lid at the top of at least one step projecting outwards

Area is limited, the width of the cylindrical

Side wall of the cover from the step-like outwardly projecting area to the bottom of the cover is larger than the width of the cylindrical holding surface of the mounting ring. In contrast to the known devices, the cylindrical design of the holding surface and its support at the lower end ensure that a tight seal between the holding surface and the opposite cylindrical outer wall of the cover is guaranteed, even if it protrudes below the cylindrical holding surface with the cover closed Area from whose side wall impressions are made. An unwanted pulling in of the cover when attaching the impressions is prevented by the step-like outwardly projecting area of the cover, 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 holding surface engaging with the cylindrical outer wall of the lid is increased by the fact that an outwardly projecting circumferential bead is attached to the lower end of the holding surface, which extends to the inside of the container wall and by rolling in the end region the holding surface is easy to manufacture. The dimensional stability of the mounting ring can be further improved if it contains an outwardly projecting 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 prevents the mounting ring from being widened and pressed outwards when the cover or the impressions are attached, which would lead to leaks in the closure and could occur, for example, if the said angle were greater than 90 degrees.

The mounting ring is preferably connected to the upper edge of the container by double edging, which increases the stiffness of the container and thus also of the Verochiuss area. The protruding step outwards - vapiJi. 1,1 - «..-» ι 11 "1" - * "1 · 1 ----- the area of the cover which prevents it from penetrating too far is advantageously guided around the cover continuously , which also improves stability.

1 _ For the same purpose, a bending or flanging of the lid above the step-like outwardly projecting area is used, which is therefore preferred.

The lid expediently consists, at least in the lower part of its side wall, of a permanently deformable material. If this is sheet metal, the impressions can be brought about by cold working. If plastic materials are used, it is advisable to heat them up when introducing the impression.

The invention furthermore proposes a device which is suitable for closing open-top vessels, preferably buckets or cans of the type described above, by means of a cover with a cylindrical outer wall which can be inserted into a holder ring located at the upper edge of the container opening, and in particular serves 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 lid and which can be displaced in the direction of its side wall and which carry embossing tools at their front ends, or are designed as such, at least two jaws being arranged in such a way that when pressing them against the

Side wall of the lid one force component each

Baking a force component of at least one other

Baking is opposite. If as material for the

Lid is used a thermoplastic, the embossing tools are preferably heated.

The jaws and thus the stamping tools are advantageous over

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I "i · 111 .......... ..............." "........ .......... ......................................... ^ .nrw ^ · the entire scope of the Cover evenly distributed and expediently displaceable by a common actuating device.

A stamp is particularly suitable for this purpose, acting in a direction perpendicular to the plane of displacement of the jaws. The stamp is preferably connected to the jaws by levers which are articulated to each of the jaws and are pivotably mounted on the stamp.

It is particularly favorable if the levers are rounded at their ends facing the stamp and are received in at least one correspondingly rounded pan-like pressure transmission element which, when the stamp is moved downward, shifts the respective levers and thereby the jaws articulated on them.

A retrieval of the jaws is expediently. causes at least one return spring, which is suspended in a sloping groove of the lever.

The stamp can advantageously be lowered to such an extent that it first introduces the jaws into a loose lid placed on a container, then presses the lid into the mounting ring and, after completion of this process, presses the jaws apart. causes. This is preferably done by means of a hydraulic or pneumatic actuation device.

The accompanying drawings serve to further explain the invention.

• ’

Figures 1 and 2 show, in vertical section, two parts of preliminary stages of a mounting ring to explain its manufacturing process.

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

Figure 4 shows in vertical section a partial view of the mounting ring of Figure 3 after fastening the same to the upper edge of a bucket. - v;

FIG. 5 shows a representation corresponding to that of FIG. 4 of the bucket which is closed by a lid and is embossed in the lid on an inadvertently opened bucket.

FIG. 6 shows a front view of a device for closing vessels, shortened in its longitudinal extent, 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 the area indicated in FIG. 6 with VII, of the device shown there, different embodiments in different operating states being shown in the left and right halves.

FIG. 8 shows a partially sectioned top view of the device shown in FIG. 7.

Figures 1 to 3 show different stages of manufacture of a mounting ring 1, which, starting from a flat annular sheet metal disc not shown in the drawings, by drawing and. We formed bending processes in the course of a cold deformation. In this case, an inner area that takes up approximately 2/3 of the total width of the sheet metal ring is first bent downward. Care is taken here that the first piece 3 adjoining the remaining ring part 2 is bent downwards at right angles to the ring part 2. This is followed by a piece 4 running inward at an angle of approximately 45 °. The lengths of the pieces 3 and 4 are approximately the same and each slightly less than about 1/6 of the entire width of the sheet metal ring. The piece 4, which runs obliquely inwards, is adjoined by a part 5, which runs perpendicularly downward to the ring part 2, the lower end 6 of which, as shown in FIG. 2, is widened outwards. As a result, the ring, which is still very unstable in FIG. 1, already has a certain dimensional stability.

In another carburetor case, the final shape of the mounting ring 1 shown in FIG. 3 is produced. Here, on the one hand, the outer edge of the ring part 2 that has just remained, as indicated by the reference number 7. -;> · indicates, bent downwards. Simultaneously with this there is a compression of the ring, which causes the piece 4, which initially runs at an angle of 45 ° to the adjacent sheet metal parts 3 and 5, now runs approximately perpendicular to these. In this way, a shoulder 8 runs around the mounting ring. Simultaneously with this procedure, the widening 6 is rolled into a bead 9. The bead 9 is dimensioned such that after a «

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

The mounting ring 1 is attached to the edge of the bucket by placing it and then double flaring, as shown in the section of FIG. 4. The piece 3 of the mounting ring is pressed against the inside of the wall 10.

After the bucket is 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 lid 12 is inserted into the socket ring 1.

The cover 12 consists of an essentially flat base part 13 and one of the latter before the insertion and closing of the cover, as indicated by the broken line in FIG. 5, the cylindrical side wall 14 projecting vertically upwards. The cylindrical side wall 14 is covered by a the cover 12 surrounding, step-like outwards in front of jumping area 15, to which a ÎÏ bent or rolled outward downward is bounded

Grip edge 16 connects, which extends over the double-flared part of the mounting ring.

The outside diameter of the cylindrical side wall 14 corresponds to the inside diameter of the part of the mounting ring 1 designed as a holding surface 11. The width b ^ of the cylindrical side wall 14 is greater than the width b2 of the holding surface 11. The region 15 projecting outwards in a step-like manner is dimensioned such that it when the cover 12 is inserted into the opening which is delimited by the holding surface 11 in cooperation with the step 8, it forms a stop which prevents the cover 12 from being pushed in further. A sealing means can be introduced between the holding surface 11 and the cylindrical side wall 14, as indicated by the reference number 17.

As soon as the cover 12 is fully inserted into the opening of the mounting ring delimited by the holding surface 11, impressions 18a, 18b / 18c,... Are made in the bottom of the cylindrical side wall 14f, making the material of the cover so permanent deform that it bulges radially, as indicated by reference numeral 19. The configuration of the cylindrical side wall 14, which is wider in comparison to the holding surface 11, ensures that the impressions come to lie under the lower edge of the mounting ring 1, in the illustrated case directly adjacent to the bead 9. This prevents the effect of the Imprints of the mounting ring itself bent, and thus the sealing effect between the holding surface 11 and the cylindrical side wall 14 is disturbed.

______ .... ..:.

. ·. ... / ** ”

The above-described process of closing and a device used to carry it out are explained in more detail below with reference to FIGS. 5 to 8.

The device for closing the containers shown in FIG. 6 with 8 contains a base plate 20. Columns 21 and 22 are held on the base plate 20 and carry a guide plate 23.

Above the guide plate 23, further columns 24 and 25 are attached, which carry a mounting plate 26. In the middle of the mounting plate 26, a source 27 for a pressure fluid, which is only indicated schematically, is fastened, which acts on a double-acting piston received between the guide plate 23 and the mounting plate 26 in a housing 29 via a line 29 with a hydraulic or pneumatic pressure fluid.

The movement of the piston is effected in a manner which is not shown in more detail and is known per se by control lines and valves provided in the housing 29.

The piston actuates a plunger 30 which raises or lowers a closure and embossing head 32 in the direction of arrow 33 via guide rods 31a and 31b. With 34 a cover of the stamp 30 is designated.

The sealing and embossing head 32 contains a solid one

Tragpl-atte 35 with a central bore in which a · guide sleeve 37 is received. The punch 30 is slidably guided in the guide sleeve 37. Through holes 38 and 39 on the side of the support plate 35 allow the support plate 35 to be displaced along the guide rods 31a and 31b, wherein the support plate is prevented from sliding out of these guide rods by nuts 40 and 41 screwed onto their ends. On the underside of the guide plate 35 and centrally to the central bore 37, a pipe section 52 is attached, in the case shown by welding.

· - ^ _ r- ^ I ".....

i * _ * r * - * '· ..-

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 32. At the lower end of the pipe section 42 an annular plate 43 is fastened, in the case shown also by welding. The plate 43 is recessed 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 by screws 45 and 46 which pass through the plate 43. The block 44 contains a central bore 47 in which an extension 30a of the stamp 30 can be slid The extension 30a of the punch is screwed onto the latter by means of a threaded connection indicated by the reference symbol 30b, a disc 48 being held between the two parts, the diameter of which is larger than the diameter of the central bore 47. At the lower end of the extension 30a is a corresponding one Disk 49 fastened. When the punch 30 moves downward, the disk 48 comes to bear against the top of the block 44 or against the bottom of a recess provided for this purpose, and when the punch 30 moves further downward it pushes the block 44 downward This state ·;. · Is shown in the right-hand part of Fig. 7. Conversely, when the ram 30 is lifted, the at the lower end of the V Extension 30a fastened disk 49 in contact with the underside of the block 44 provided with a pot-like recess in this area and lifts it up. This state is shown in the left part of FIG. 7.

The block 44 contains in its lower area an annular disk-like extension 50, the diameter of which corresponds approximately to the outer diameter of a cover 51, which is only indicated schematically and with which a vessel, for example a bucket according to FIG. 5, is to be closed with the aid of this device. A row of jaws 52a, 52b, 52c ... is arranged on the underside of the annular disk-like projection 50 so as to be displaceable in the radial direction in a plane running perpendicular to the longitudinal axis of the stamp. In the embodiment shown in the right part of FIG. 7, the jaw 52e is designed as an embossing tool on its outward-facing front in the lower region. For this purpose, it contains a corresponding cutting-like projection 53 which is shaped in accordance with the contour of the cover. When the jaw is moved outwards, the projection 53 creates an indentation 54 in the side wall of the cover 51, as shown in the right part of FIG. 7.

The jaw 52a shown in the left part of FIG. 7 carries an embossing tool 55 at its outward end, which is detachably connected to the jaw 52a by means of a countersunk screw 56 and two guide pins 57 and 58. This embodiment has the advantage that the stamping tools which are subject to wear can be replaced without the jaws themselves being affected thereby. The jaws are star-shaped at equal angular distances from each other around the longitudinal axis

of the stamp 30 arranged, which is best seen in Fig. 8- -y-V

goes. The jaws are chamfered at their rear ends so that a denser packing is possible.

The jaws are guided and held in abutment on the underside of the disk-like extension 50 by screws 59 and 60, which are guided in elongated holes 61 running parallel to the central axis of the jaw and penetrating the extension 50, and from the top of the extension 50 to in from the top the jaws 62 extend vertically downwards. The danger ' " * . t. · ’...,. («, v /.

V ·, - · 'V' »of tilting of the jaws during their longitudinal displacement is prevented by the use of plate-shaped spacers 63 arranged on the top of the projection 50, each of which has a hole for the two screws 59 assigned to each jaw at a defined distance from one another and 60 included.

The spacers simultaneously protect the elongated holes 61 against the ingress of contaminants.

The jaws each have a slot-like recess 64 in the middle of their rear region. The recess 64 is penetrated at its end facing the front of the jaw by a pivot pin 66, which is received in a through hole 65 running transversely through the jaws. The through hole 65 is, as can be seen in particular from FIG. 8, arranged such that the holes 62 for the screws 59 and 60 open into it, which in this way prevent the pivots 66 from slipping sideways.

Levers 67a, 67b, .., the width of which corresponds to the recess 64, are pivotably mounted on the pivot pins 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 68 which are received in a correspondingly shaped pan-like pressure transmission element 69. The pan-like pressure transmission element 69 consists of a ring which is held on the underside of the extension 30a of the stamp 30 below the disk 49 and is made of a resistant, abrasion-resistant material.

The levers 67a ... are furthermore provided with slots 70 which run obliquely in the direction of the center of the arrangement and into which an annular spring 71 is inserted.

Claims (16)

1. A method for closing open at the top of vessels, preferably buckets or cans, attaching a mounting ring to the upper edge of the container wall and inserting a lid provided with a cylindrical outer wall, characterized in that • in the cylindrical outer wall of the lid, after its insertion into the mounting ring, impressions are introduced from the inside of the cover in such a way that the impressions adjoin the lower, preferably beaded edge of the mounting ring, or come to lie below it. 2. The method according to claim 1- .îc-by «·. indicates that the impressions are produced by at least parts of the cover being pressed outwards by a side wall of the cover. - ··· - 3. The method according to any one of the preceding claims, characterized in that the impressions are applied to extend over the entire circumference of the lid. 4. The method according to any one of claims 1 or 2, characterized in that the embossments are introduced at discrete distances from one another over the circumference of the lid. ÿ- 5. The method according to any one of the preceding claims, characterized in that the impressions at the transition of the cylindrical outer wall in the bottom region of the lid • are introduced. 6. The method according to any one of the preceding claims, characterized in that before the introduction of the lid h, a sealant is inserted between the mounting ring and the lid =: -: is brought. 7. The method according to any one of the preceding claims, characterized in that the cover when introducing the impressions with at least one, the cylindrical side surface delimiting top, step-like outwardly projecting area in contact with an outwardly projecting, adjacent to the cylindrical holding surface paragraph of the mounting ring is held. 8. Device for closing open-top vessels, preferably buckets or cans, with a: '·' on the upper edge of the container wall and a mountable ring, which can be inserted into it and provided with a cylindrical outer wall, in particular for carrying out a method according to one of claims 1 to 7, characterized in that the mounting ring (1) receives a cylindrical holding surface (11) facing the cylindrical side wall (14) of the cover (12), which is located on its lower! v. The end is supported on the container wall (10), and that the side wall (14) of the lid, which extends cylindrically to the bottom of the lid when the lid is not yet closed, is delimited by at least one step-shaped, outwardly projecting area (15), the width ( b ^) of the cylindrical side wall (14) of the cover from the step-like outwardly projecting area to the bottom of the cover is greater than the width (b2) of the cylindrical holding surface (11) of the mounting ring (1). :. ... ** - 9. The device according to claim 8, characterized in that at the lower end of the holding surface (11) an outwardly projecting, circumferential bead (9) is attached, which extends up to the "inside of the container wall (10). 10. The device according to claim 8 or 9, characterized in that the mounting ring (1) at the upper edge of the holding surface (11) contains an outwardly projecting shoulder (8) which with the adjacent upper edge of the container (10) • .. . *; : includes an acute to right angle,: ’; - 11. Device according to one of claims 8 to 10, characterized in that the mounting ring (1) with the upper edge of the container (10) is connected by double edging. - '.- * ·· ’.......... Ν-ι ··« · "- · - 12. Device according to one of claims 8 to 11, there. characterized in that the area (15) of the cover projecting outward in a step-like manner extends continuously around it. 13. Device according to one of claims 8 to 11, characterized in that the cover is bent or flared above the step-like outwardly projecting area. 14. Device according to one of claims 8 to 12, characterized in that the cover (12) at least in the lower part of its side wall (14) consists of a permanently deformable material. 15. Device for closing open on their upper side vessels, preferably buckets or cans, by means of a lid which can be inserted into a mounting ring fastened to the upper edge of the container opening and has a cylindrical outer wall, preferably according to one of the claims 8 to 14 and in particular for carrying out a method according to one of claims 1 to δ, characterized by at least two jaws (52 a,...) That can be inserted into the interior of the lid and that can be displaced in the direction of its side wall Embossing tools (53) carry (Fig. 7, right), or are included as an element which, when the punch (30) is moved downward, moves the respective lever and above it, which moves the hinged jaws outwards. 20. Device according to one of claims 15 to 19, characterized by at least one return spring (71) which engages in a respective groove (70) of the levers (67a, ...). .. 'rv, ·· '21. Device according to one of claims 17 to 19, characterized in that the plunger (30) can be lowered so far that it first introduces the jaws (52a, ...) into a loose cover (51) placed on a container. , then pressing the lid into the mounting ring, and after completing this process, pressing the jaws apart.