EP2155599B1 - Device for opening tins - Google Patents

Description

The invention relates to a device for opening cans, in which the lid is connected to the can body via a flange, wherein the device has a cutting wheel, which on the inside of the flanged edge in the edge region of the lid mirror this separates out, wherein in the cutting position of the cutting wheel (12 ) the plane of which is aligned parallel or substantially parallel to the edge plane of the can (30), wherein the cutting wheel (12) is rotatably mounted on a pivot lever (11) and in the radial direction in the cutting position in or out of this is movable ,

US 1,006,574 relates to a device for targeted clean separation of the upper edge of a barrel lining, this device is introduced from above into the open, thus not having a lid container.

US 2,886,887 . US 5,682,681 and US 5,857,254 relate with respect to the above-mentioned object similar training, with which the upper edge of a barrel is cut by means of the cutting wheel, which on the one hand a sharp edge is present (especially for drinking vessels due to injury not suitable) and on the other hand, the edge in addition as a separate part to the separated Lid is incurred.

The US 3,348.30 corresponds to the preamble of claim 1, and relates to a can opener with a cutter wheel, which can separate the inside of the bead of a can. It is described as advantageous that the cutting blade does not come into contact with the can contents.

In other known embodiments, the cutting wheel is approximately perpendicular to the plane of the cover mirror, that is, that the cover mirror is cut out in the region of the edge of the mirror. In these embodiments remains inside a radially inwardly projecting edge, which can easily lead to injury. In addition, a step is provided by the projecting edge on the side facing the can interior, in which filling material of the can remains.

Although there are already known can opener in which the cutting wheel cuts in a plane parallel to the lid mirror plane, however, these cutting wheels are effective on the outside of the can and separate the bead at the top of the can from the hull material of the can, so that the bead the lid is lifted off the opened can. Such can openers have the disadvantage that the sharp-edged Edge of the can body remains, so that there is again a significant risk of injury.

The invention is based on the object to provide a device for opening cans, by means of which doses are to be opened such that no sharp-edged edges remain in the can opening.
According to the invention, this object is achieved in that the cutting wheel is advanced in the cutting position in the radial direction into the wall of the upper edge of the can body without severing intersecting, wherein the cutting wheel in the direction of the edge of the can to the cutting edge then a displacement shoulder is provided. It is thereby achieved that the lid is cut off in the area carrying the flange, thereby avoiding that residual areas or residual webs of the lid remain, which then protrude into the can opening and on the one hand cause injuries and on the other hand retain goods in the container. Such opening devices for cans are particularly suitable for beverage cans inasmuch as after appropriate separation of the lid mirror, the can can be used as such as a drinking cup, especially since any sharp edges are avoided. This is done on the one hand the cutting of the lid in the region of the flange and thus the edge of the cut edge is urged toward the edge of the can body and on the other hand also by additionally pressed by the displacement shoulder of the remaining lower edge of the flange to the outside is.

According to the invention the cutting wheel is rotatably mounted on a pivot lever which is pivotable via a link control in the sense of the radial adjustment of the position of the cutting wheel. This makes it possible to perform an automatically controlled opening of the box. In this case, the pivot lever can be pivotally mounted on a parallel to the edge plane of the edge box pivot axis in a rotatable in a parallel to the edge plane of the edge box holding sleeve, with a stationary box, the rotation of the holding sleeve is in engagement with the cutting wheel more than 360 ° of the can edge course. This is achieved in a simple way a perfect separation of the lid mirror, with a simple and secure guidance of the Cutting wheel is given. Furthermore, acting on the can Gegendruck- or holding members for holding the can edge against the pressure of the cutting wheel may be provided, whereby a direct clamping of the can rim is given during the cutting process. In a simple embodiment can be provided as holding member a the edge of the can enclosing the outside retaining ring.

Furthermore, the control link of the slide control can be rotatably mounted coaxially to the retaining sleeve in a direction of rotation of the retaining sleeve of the pivot lever of the parallel plane, wherein the control link to the retaining sleeve is relatively rotatable. This makes it possible that due to the relative movement of the control link with respect to the retaining sleeve a working path of the steering wheel of greater than 360 ° of the Dosenradumfanges is achieved, although the curve length of the control link is only 360 °. To control the cutting movement of the cutting wheel, the control link can be rotated at a higher speed than the retaining sleeve, which implies that an effective control link is given at more than 360 ° of the edge of the can. Alternatively, this can also be achieved in that the control link of the retaining bush is preferably driven nachführbar by means of a stepping mechanism.

To achieve the pivoting movement of the cutting wheel holding the pivot lever, the control link can be formed as a circular path, on the inside of which the link control associated sensing element attacks, which has an outwardly directed recess for partially receiving the sensing element at a local portion of the course. This ensures that the cutting wheel is moved out of the cutting position and into the insertion position of the can at this one point at which the feeler engages in this recess. The fact that the movement exceeds 360 °, there is a complete severing of the lid, although, as stated, the working path of the control link is only 360 °.

In order to facilitate the removal of the cut-out lid mirror, a displacement shoulder can be provided on the cutting wheel in the direction of the edge of the can to the cutting edge, which causes the flare is forced outward, whereby the opening diameter of the can body is increased and thus the lid mirror the can opening can be lifted out. The latter can preferably be achieved by centrally means for holding the cut-out lid mirror eg suction cup, a suction cup or the like is provided.

• Fig. 1 ist ein Vertikalschnitt dach Linie I,I der Fig. 2.
• Fig. 2 gibt eine Draufsicht auf das Gerät gemäß Fig. 1 wieder.
• Fig. 3 ist ein Schnitt nach Linie III,III der Fig. 1.
• Fig. 4 veranschaulicht einen Schnitt nach IV,IV der Fig. 1.
• In Fig. 5 ist ein Schnitt nach Linie V,V dargestellt und in
• Fig. 6 ein Schnitt nach Linie VI, VI.
• In Fig. 7 ist im Detail der Schneidbereich der erfindungsgemäßen Vorrichtung in Ruhestellung gezeigt.
• Fig. 8 gibt den gleichen Bereich in Arbeitsstellung bei eingerücktem Schneidrad wieder.
• In Fig. 9 ist der Ablauf des Schneidens dargestellt, wobei Fig. 9a die Einzelteile in Ruhezustand wiedergibt.
• Fig. 9b die einzelnen Teile nach Einsetzen der Dose zeigt;
• Fig. 9c gibt die Einzelteile in Arbeitszustand wieder.
• Fig. 9d veranschaulicht die Schneideinrichtung nach Durchtrennen des Deckelrandes und wieder ausgerücktem Schneidrad und
• Fig. 9e zeigt die einzelnen Teile nach Herausnehmen der Dose bei noch in der Vorrichtung befindlichem Deckelspiegel.

In the drawing, an embodiment of the subject invention is shown.

• Fig. 1 is a vertical section roof line I, I the Fig. 2 ,
• Fig. 2 gives a top view of the device according to Fig. 1 again.
• Fig. 3 is a section according to line III, III of Fig. 1 ,
• Fig. 4 illustrates a section according to IV, IV of Fig. 1 ,
• In Fig. 5 is a section along lines V, V and shown in
• Fig. 6 a section according to line VI, VI.
• In Fig. 7 is shown in detail the cutting region of the device according to the invention in the rest position.
• Fig. 8 returns the same area to the working position with the cutting wheel engaged.
• In Fig. 9 the sequence of cutting is shown, with Fig. 9a the items in rest state.
• Fig. 9b shows the individual parts after inserting the box;
• Fig. 9c returns the items to working condition.
• Fig. 9d illustrates the cutter after cutting the lid edge and disengaged cutting wheel and
• Fig. 9e shows the individual parts after removing the can with befindlichem in the device lid mirror.

1 with the opener is generally referred to, which is attached via vertical columns 2 to a base plate 3. For this attachment, a motor plate 4 and a bearing plate 5 are provided parallel to the base plate at the upper end of the pedestal on the pedestals, wherein between the motor plate and bearing plate, a space for receiving the drive gears is provided.

At the bottom plate 3 side facing the motor plate 4, a cutting device 6 is provided, which by means of a bearing bush 7 on the motor plate is attached. In this bushing 7, a pivot bearing 8 is arranged, via which a rotary console 9 is rotatably mounted in the motor plate. This rotary console is used via a bearing shaft 10 for supporting a pivot arm 11, wherein this bearing axis 10 extends parallel to the motor plate 4 and thus is rotatable by 360 ° within the motor plate. At the mounted on the bearing shaft 10 pivot arm 11, a cutting wheel 12 'is held by a bearing 11' frontally and protrudes from above into the bearing ring 7 inside. At another end of the pivot lever 11, a feeler 13 is provided that cooperates with a control link 14. The control link is essentially a circular path which locally has a recess 14 'at one point for receiving the feeler element 13. The rotary console is provided on the outside with a drive sprocket 15, to which coaxially the drive sprocket 16 is arranged with the control link 14. To drive the drive sprocket 15 and the drive pinion 16, a drive motor 17 is provided, on the drive shaft of which meshes with the drive sprocket 15 drive pinion 18 and meshing with the drive sprocket 16 drive pinion 19 are rotationally connected. The drive sprocket 15 in this case has a larger diameter than the drive sprocket 16, wherein the associated drive pinion 18 and 19 correspondingly different diameters, ie that the drive sprocket 18 for the drive sprocket 15 has a smaller diameter than the drive sprocket 19 for the drive sprocket 16 of the control link 14. Coaxial with the drive pinions 18 and 19 is still a control drive pinion 20 is provided that meshes with a steering wheel 21 for measuring the rotation of the drive motor.

The diameters of the individual sprockets or sprockets are tuned so that at a 360 ° rotation of the control gear 21 provided with the drive sprocket 15 rotary console 9 performs a revolution of about 360 ° preferably between 365 ° and 375 °, wherein due to the vote of the diameter with its drive pinion 16 for the control link 14, the control link is driven so that the sensing element 13 is pushed out of the recess 14 'by the advance of the recess 14' and is brought to the circular path 14 in the engaged position for cutting. The pivot lever 11 is held so long in the engaged position of the cutting wheel 12 until the feeler 13 can again come into the recess 14 'of the control link 14. For this purpose, the steering wheel 16 must go through more than two revolutions to one Ensure circumferential travel over 360 ° of the cutting wheel, otherwise a complete cutting of the lid edge is not given.

To hold the drive sprockets or the storage of the drive sprockets 15,16 and the rotary console 9, a bearing part 34 is attached to the top of the position plate 5.

On the underside of the cutting device 6, a retaining ring 22 is provided for a can 30, in which the can 30 engages with the flange 31 from below. For holding the can 30, a bottom support 23 is provided, which is biased by a spring 24 in the direction of pressing the can into the retaining ring 22. To insert the can, a pressure bracket 25 is provided, with which the bottom support 23 can be pressed down.

In order to hold the separated lid, a Saugknapf 27 is provided via a support rod 26 which can be lowered centrally on the lid mirror 32 and holds the lid mirror after separation until the can is removed from the ground support.

To remove the lid is at in Fig. 9 a reproduced position of the items a can placed on the bottom support 23 and pressed by means of the spring 24 in the retaining ring 22 so that the flange 31 fed to the inside of the retaining ring 22 (see Fig. 9b) , In this position, the feeler 13 is located in the recess 14 'of the control link 14. Thereafter, the motor 17 is turned on whereby due to the higher speed of the control link the feeler 13 is pushed out of the recess 14 ', and the cutting wheel 12 so engages the flange of the lid and on the inside thereof (see Fig. 9c) , Due to the relative speed between the drive sprocket 16 for the control link 14 and the drive sprocket 15 for the rotary console 9 in which the pivot arm 11 is mounted for the cutting wheel 12, upon rotation of the rotary console 9, the cutting wheel is engaged in the Bördelwandung namely until so long of the steering wheel 21, the rotary console has traveled a path of over 360 °, ie, that the recess 14 'after overtaking the feeler 13 has caught up again. The feeler 13 then falls again in the recess 14 ', whereby the pivot arm 11 is pivoted so that the cutting wheel 12 is disengaged from the lid edge passes (see Fig. 9d) , How out Fig. 8 can be seen, the cutting edge 28 of the cutting wheel 12 engages through the lid side edge, which leads to the flanging, and engages into the fuselage 33 of the can 30, thus ensuring that the lid edge is reliably severed. Furthermore, a displacement shoulder 29 is provided on the cutting wheel 12 above the cutting edge 28, which urges the edge of the cut on the flange to the outside and thus pushes the cutting edge in the Rumpfwandung so that sharp edges are avoided. In addition, the opening of the can 30 is thus slightly widened, so that the can can be removed and the lid base 32 can be held in position on the suction cup 27 until the can is removed.

The device according to the invention is particularly suitable for those cans whose flanging is slightly conically inclined outwards, so that after severing the leading edge for crimping and outward urging of the edge by means of the displacement shoulder 29, the opening of the can edge is slightly larger than the outer edge of the remaining lid level, so that it can be done without difficulty, a removal of the can and it is avoided that the lid mirror can fall into the interior of the can.

Claims (6)

1. A device for opening tins, in which the lid is connected to the tin body via a flanged portion, wherein the device has a cutting wheel which, on the inside of the flanged rim, severs the lid area in the rim region thereof, wherein the plane of the cutting wheel (12), in the cutting position of the same, is oriented parallel or substantially parallel to the rim plane of the tin (30), wherein the cutting wheel (12) is movable in the radial direction into and out of the cutting position, wherein, in the cutting position, the cutting wheel (12) can be pushed fowards in an engaging manner in the radial direction into the wall (33) of the upper rim of the tin body, wherein a displacement shoulder (29) which pushes the cutting rim outwards is provided on the cutting wheel (12) in the direction of the rim edge of the tin adjoining the cutting edge (28), characterized in that the swiveling lever (11) can be swiveled via a connecting link control device (13,14) for the purpose of radially adjusting the position of the cutting wheel (12), and that the cutting wheel (12) is rotatably supported on a swiveling lever (11).
2. The device according to Claim 1, characterized in that the swiveling lever (11) is swivelably supported via a swiveling axis (10) extending parallel to the rim plane of the tin (30) in a console (9) which can be rotated parallel to the rim plane of the tin (30), wherein when the tin (30) is stationary the rotary course of the rotatable console (9) amounts to more than 360° of the course of the tin rim when the cutting wheel (12) is engaged.
3. The device according to Claim 1 or 2, characterized in that the control connecting link (14) of the connecting link control device (13,14) is rotatably supported in a plane parallel to the rotation plane of the rotatable console (9) of the swiveling lever (11) coaxially to the rotatable console (9), wherein the control connecting link (14) can be rotated relative to the rotatable console (9).
4. The device according to Claim 3, characterized in that the control connecting link (14) can be rotated at a higher speed than the rotatable console.
5. The device according to any one of Claims 1 or 2, characterized in that the control connecting link of the retainer sleeve is driven in a trackable manner, preferably by means of a stepping mechanism.
6. The device according to any one of Claims 1 to 5, characterized in that the control connecting link (14) is formed as a circular path, upon the inside of which the feeler (13) associated with the connecting link control device (13,14) acts, said connecting link control device comprising an outwardly facing recess (14') for partially receiving the feeler (13) on a local section of the course.

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