EP2387542A2

EP2387542A2 - Closure head for container closure machines and container closure machine

Info

Publication number: EP2387542A2
Application number: EP09796309A
Authority: EP
Inventors: Matthias Naaber
Original assignee: KHS GmbH
Current assignee: KHS GmbH
Priority date: 2009-01-15
Filing date: 2009-12-15
Publication date: 2011-11-23
Anticipated expiration: 2029-12-15
Also published as: DE102009005150A1; EP2387542B1; PL2387542T3; WO2010081518A2; US20110225928A1; US8631630B2; SI2387542T1; WO2010081518A3

Abstract

The invention relates to a closure head for container closure machines (1) for closing bottles or similar containers (2) with closures (3), having a head part (16), having a receptacle (20) formed on the head part and open on the underside of the closure head (10) and of the head part (16) for one closure (3) in each case, the receptacle (20) forming at least one radial and at least one axial abutment surface (21, 22) relative to an axis (KA) of the receptacle (20) for the closure (3) held in the receptacle (20), and the radial abutment surface (21) for at least force-fit retaining of the closure (3) in the receptacle (20) being formed in part of at least one displaceable segment (17) displaceable at least radially to the axis (KA) of the receptacle at least in the region of the radial abutment surface (21).

Description

Closing head for container sealing machines as well as container sealing machine

The invention relates to a capping head for use in container sealing machines for closing bottles or similar containers with closures, for example with screw caps, according to the preamble of claim 1. The invention further relates to a container closing machine for closing bottles or similar containers with such closures according to the preamble Claim 15.

Container closing machines for closing bottles or other containers are known in different designs. In particular, container sealing machines are also known for closing bottles or other containers with screw caps. The application of these closures on the container by screwing onto an external thread, which is provided in the region of the respective container mouth, by screwing with a Verschließwerkzeug, which is equipped with a receptacle for the respective closure forming capper head. In detail, the closure of the respective container takes place in such a way that the respective closure is first received in the receptacle of the closing head. Following this, the closure head is at least frictionally, i. held on the container opening by means of clamping and then screwed onto the respective container with the capping head rotating about a capping axis or about an axis of the receptacle. In this case, in the case of a frictional connection, it is not precluded that grooves and / or corrugations are provided, which thus make possible at least a partial positive connection by a toothing of the contours of the surface contiguous to one another.

With this screwing on, the container lies axially against the capping head or against the closure held in this capping head, i. in the direction of the axis of the recording with a certain force, for example, with a force of 20 kp or about 200N pressed on.

For a reliable and sufficiently tight closure of the container, it is necessary that the respective container closure sufficiently strong, that is screwed with sufficient torque on the container to be closed, regardless of tolerances that the container closures usually wise in particular also with respect to the effective outer diameter and which can severely impair the positive connection or the clamp attachment of the respective container closure in the capper head.

The object of the invention is to show a capper head, which ensures reliable closure of bottles or similar containers even with larger tolerances of the container closures. To solve this problem, a capper head according to the patent claim 1 is formed. A container closure machine is the subject of patent claim 15.

Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and from the figures. In this case, all described and / or illustrated features alone or in any combination are fundamentally the subject of the invention, regardless of their summary in the claims or their dependency. Also, the content of the claims is made an integral part of the description.

The invention will be explained in more detail below with reference to the figures in an exemplary embodiment game. Show it:

Fig. 1 in a simplified representation of a container sealing machine of rotating design for closing bottles or similar containers with container closures in the form of cap-like screw caps; FIG. 2 is a perspective detail view of the closing head of a closing tool or screw capper of the container closing machine of FIG. 1; FIG.

FIG. 3 shows the closing head of FIG. 2 in a perspective detail view and in section, together with a screw cap also shown in section; FIG.

Fig. 4 shows the capper head in vertical section, together with a partial view of a screw cap.

The container sealing machine of general design generally designated 1 in FIG. 1 serves to close bottles 2 with cap-like screw caps 3, each integral with a bottom 3.1, with a cap edge 3.2 and with ribbing 3.2.1 on the cap edge 3.2, for example made of plastic are made. This outer corrugation 3.2.1 is generally suitable for the inner contour 21 of a single head piece 16.

The container closing machine 1 consists in the manner known to those skilled in a rotatable about a vertical machine axis MA rotatably rotor 4, on whose circumference a plurality of Verschließpositionen 5 u.a. are each formed with a closing tool 6 in the form of a screw capper and each with a container carrier 7 for hanging support of the respective bottle 2. The closing tools 6 of the closing positions 5 essentially consist of an electromotive drive 8, of a spindle 9 oriented with its axis parallel to the vertical machine axis, which is drivingly connected at its upper end to the drive 8 or to the motor shaft of this drive 8, With this, the respective screw cap 3 is removed at a non-illustrated closure transfer position with circulating rotor 4, then placed by lifting the respective bottle 2 against the capper head 10 on the bottle mouth and then on the The capper head 10, which is driven in rotation about its axis VA by the drive 8, is screwed onto the relevant bottle 2 or onto an external thread provided in the region of the bottle mouth, as is also known to the person skilled in the art. Of course, those skilled in the art also central mechanical drives for capper and mechanically derived drives of the spindles 9 are known or devices in which the capper head is lowered onto a standing or suspended bottle.

As particularly shown in FIGS. 2-4, each capper head 10 is u.a. from a bearing element or a Verschließerkopfbasis 11, which is provided at the lower end of the spindle 9 or a spindle portion, namely spring-axially displaceable in the axial direction of the spindle 9, but drivingly connected to the spindle 9. The closure head 10 is fastened with its locking head axis VA coaxially with the spindle axis on the spindle 9.

The closure head base 11 is formed as a molded part of a suitable material, for example of a metallic material, in one piece with an upper, plate-shaped base portion 12, which in the illustrated embodiment has a substantially square shape in plan view, and four each at a corner portion of the portion 12 provided, over a common bottom of the base portion 12 wegstehende corner posts 13 made. The Corner posts 13 are each designed as an angle piece with two legs 13.1 arranged at least with their outer, ie facing away from each other surface planes in planes parallel to the axis VA and perpendicular to the top and bottom of the base portion 12 and also perpendicular to each peripheral side of this base portion 12 are.

The two legs 13.1 of each corner post 13 close at their mutually facing surface sides an angle of 90 ° with each other, which opens to the periphery of the capping head 10 and the Verschließerkopfbasis 11 out. In a variant, not shown, the posts are not designed as an elbow with two legs but as fingers or columns, so that each finger or column serves as a holder and / or storage for one or two joints. The capper head base 11 is further formed in the center of the base portion 12 with an opening 14 which serves to fasten the capping head 10 to the spindle 9 and is provided internally with suitable connecting means, for example with an internal thread. To reinforce the closure head base 11 in the region of the opening 14 of the base portion 12 is integrally formed on its upper side with an opening 14 enclosing annular projection 15.

Each capping head 10 further consists of a sleeve-like head piece 16, which serves for receiving the respective screw cap 3 and for screwing this closure 3 onto the respective bottle 2 to be closed. The sleeve-like head piece 16 is formed in the illustrated embodiment of a total of four segments 17, which complement each other to the sleeve-like head piece 16 and each adjacent surfaces 18 adjoin each other, (surfaces) lie in planes that are radial or substantially to the axis KA the sleeve-like head piece 16 are oriented.

The head piece 16 forms an opening on the inside, which is open at the lower side of the base portion 12, but slightly spaced from this bottom upper end 16.1 of the head piece 16 and also at the base portion 12 remote from the lower end 16.2 of the head piece 16. At least when there is no screw cap 3 in the capping head 10 or in the head piece 16, the segments 17 are in the region of the lower end 16.2 of the head piece 16 with their surfaces 18 against each other, so that the axis formed by the axis of the opening 19 KA of Head 16 is coaxially aligned with the axis VA and the inner surface of the opening 19 in both an upper Opening portion 19.1, as well as in a lower portion 19.2 kreiszylinderför- mig or substantially circular cylindrical is formed.

The inner diameter of the opening portion 19.1 is slightly larger than the inner diameter of the opening 14 in the illustrated embodiment. The inner diameter of the opening portion 19.2 is slightly larger than the inner diameter of the opening portion 19.1. The opening portion 19.2 forms the receptacle 20 for receiving and holding a respective screw cap 3 by clamping. With the header 16 empty, i. in the absence of screw 3 in the receptacle 20, the inner diameter of the opening portion 19.2 is therefore slightly smaller than the outer diameter of the cap-like screw caps third

At the radial surface 21 for the screw caps 3 forming inner surface of the opening portion 19.2 is provided with a corrugation corresponding to the corrugation on the circumference 3.2.1 or 3.2 At the cap edge of the screw 3 so that each recorded in the receptacle 20 screw 3 with his Corrugation Corrugation 3.1 fits into the corrugation of the contact surface 21.

In order to facilitate the insertion of the respective screw cap 3 into the head piece 16 or the receptacle 20, the head piece 16 and the segment 17 forming this head piece are designed at the lower end 16.2 with a rounded end face. Furthermore, at the lower end 16.2, the opening section 19.2 merges into an opening section 19.3 which is somewhat larger in diameter and then forms the lower, open end of the opening 19 or receptacle 20.

Due to the step-shaped transition between the opening portions 19.1 and 19.2, an annular axial bearing surface 22 is formed in the opening 19, against which the respective recorded in the receptacle 20 screw 3 is supported when closing with its bottom 3.1, thereby u.a. a clear axial positioning of each screw 3 in the receptacle 20 is achieved.

The segments 17 are each provided with two over the outer surface of these segments or the head piece 16 wegstehende, ear or lug-like in the illustrated embodiment, holding arms 23, in such a way that the two support arms 23 in an axial direction tangential to the axis KA concentrically enclosing circle line are offset from each other and each support arm 23 is in the region of a surface 18, namely the top 16.1 of the head piece 16 substantially closer than the bottom 16.2 of this head piece. With the help of bearing pin 24, the bearing holes 25 pass through in the support arms 23 and are held at both ends to one of the corner posts 13, the segments 17 are pivotally connected to the Verschließerkopfbasis 11.

In detail, the bearing pins 24 each extend between two corner posts 13 and are aligned with their axis parallel to one side of the substantially square executed base portion 12 of the Verschließerkopfbasis 11 and thus tangent to a the axes VA and KA concentrically enclosing circle line, so the segments 17 about the axis of the associated hinge pin 24 at least at the lower end 16.2 of the head piece 16 relative to the axis KA are radially outwardly and inwardly pivotable. With their sides facing away from each other, the holding arms 23 are supported in each case against a leg 13.1 of the relevant corner post 13, so that the segments 17 are held non-displaceably on the hinge pin 24 in the axial direction of the hinge pin 24.

In the region of the lower end 16.2, an axis KA concentrically enclosing annular spring element 26 is provided on the outer surface of the head piece 16, which engages for its axial securing in an annular groove of the outer surface of the head piece 16 and in the illustrated embodiment of an O-ring of a rubber-elastic material is formed. With the spring element 26, the segments 17 are biased radially inwardly relative to the axis KA for clamping the respective screw cap 3 in the receptacle 20.

The segments 17, including their holding arms 23, are ideally each made identically from a suitable material, for example made of metal or a suitable plastic, so that the closing head 10 mirrors in all planes including the axes VA and KA and oriented perpendicular to the peripheral sides of the closure head base 11 - Is formed or rotationally symmetrical. Of course, non-symmetrical embodiments are conceivable or embodiments in which at least one segment 17 is not stored suspended, but is rigidly connected to the Verschließerkopfbasis 11 in particular the base portion 12.

As shown particularly in FIG. 4, the pivot axis of each segment 17 formed by the respective pivot pin 24 has a radial distance X from the axis VA or KA which is greater than the maximum radial distance x which the pivotal axis .alpha Having this segment 17 formed axial contact surface 22 of the axis VA or KA. This means that from compressive forces F, which act on the contact surface 22 via a screw cap 3 accommodated in the receptacle 20, moments M around the axes of the hinge pins 24 result which (moments) in the sense of closing the head piece 16, ie in the sense of Swivel the segments 17 act radially inward, so that the hold of the respective screw cap 3 in the receptacle 20 is further strengthened by clamping.

When receiving the respective screw cap 3, this is opened with easy opening of the head piece 20, i. with slight pivoting of the segments 17 at the lower end 16.2 introduced against the action of the spring element 26 in the receptacle 20 and held in this recording by the action of the spring element 26 by a press fit. As a result of the bottom 3.1 resting against the contact surface 22, the screw cap 3 in the receptacle 20 has a predetermined position, in which this screw cap projects with its lower, open edge region over the underside 16.1. After placing the screw cap 3 on the mouth region of a bottle 2, the bottle 2 is pressed against the screw 3 with the force F of, for example, 20 kp or about 200N, so that by this force F over each segment 17 an additional radial clamping force F 'on the in the receptacle 20 recorded closure 3 is exercised. The magnitude of the clamping force F 'results from the force F and the transmission ratio of the lever arms a and A.

Here, the lever arm a is the mean effective distance of the axial bearing surface 22 from the axis of the associated hinge pin 24 and the lever arm A, the average effective distance of the radial bearing surface 21 from the axis of this bearing pin 24th

It is therefore possible, depending on the individual Verschließaufgabe and required Verschließkraft to adjust the clamping force by changing the lever arms or the Hebelarmverhältnisses a to A and / or y to Y in the desired manner or to vary.

After screwing the screw cap 3 on the relevant bottle 2 can by eliminating the force F and the additional contact force F 'due to the lowering of the bottle 2 of the capper head 10 and / or by raising the capper head 10 of the bottle 2 of Verschlie- ßerkopf 10 easily from the screwed onto the bottle 2 screw 3 are separated.

As FIG. 4 also shows, the distance Y of each hinge pin 24 from a reference plane BE enclosing the open side of the receptacle 2 and oriented perpendicular to the axis KA is greater than the distance y of the axial abutment surface 22 from this reference plane BE.

In particular, by the arrangement of the pivot pins formed by the bearing pin 24 of the segments 17 with respect to the axial bearing surface 22, the closure head 10 thus u.a. the advantage that a reliable clamping of the respective screw cap 3 is achieved by the additional radial clamping force F 'even with larger tolerances and the diameter of the screw caps 3. Such tolerances are caused, for example, by a shrinkage of plastics screw closures 3 and / or by a thickness which is difficult or impossible to control in terms of thickness or which is difficult to control on the screw caps 3.

In a variant, not shown, it is provided that the hinge pin 24 lie in a plane that intersects the segments 17 in the middle or below the middle and this plane is perpendicular to the axis KA. In such a case, it may be advantageous that, instead of the spring element 26 attached to the segments 17 from the outside at the lower end, one or more expanding spring elements are arranged at the upper end. As will be apparent to those skilled in the art, in some such embodiments, some of the lever arm ratios described above reverse according to the desired force action or must be adjusted accordingly.

The invention has been described above by means of an embodiment. It is understood that numerous changes and modifications are possible without thereby departing from the inventive idea underlying the invention.

It has heretofore been assumed that the head piece 16 has a total of four movable segments 17, which are pivotally provided on the capper head base 11. The number of movable segments 17 may also deviate from this. Thus, for example, two or three or more than four segments 17 may be provided, which then in each case, for example, in a common plane arranged axes are tangential to the Verschließerkopfachse VA concentrically surrounding imaginary circular line are pivotable.

LIST OF REFERENCE NUMBERS

1 container sealing machine

2 bottle

3 cap-type screw cap

3.1 Bottom of the screw cap

3.2 Cap edge of the screw cap

3.2.1 Corrugation Corrugation

4 rotor

5 closing position

6 closing tool

7 container carriers

8 drive

9 spindle

10 capper head

11 capper base

12 base section

13 corner posts

13.1 thighs

14 mounting hole

15 ring-like projection

16 head piece

16.1 Top of the head piece 16

16.2 Bottom of the head pieces

17 segment of the head piece 16

18 area

19 head opening

19.1 - 19.3 opening section

20 recording

21 Radial contact surface with corrugation. Corrugation

22 axial contact surface

23 holding arm

24 hinge pins

25 bearing bore

26 spring element

a, A lever arm x, x radial distance y. Y axial distance

F axial contact force

F ¹ radial contact force

M moment

BE reference plane

KA axis of the head piece 16

VA axis of the capper head 10

Claims

claims

1. Closing head for container closure machines (1) for closing bottles or similar containers (2) with closures (3), with a head piece (16), with a head piece formed on the underside of the capper head (10) and the head piece (16 ) open receptacle (20) for each one closure (3), wherein the receptacle (20) relative to an axis (KA) of the receptacle (20) at least one radial and at least one axial abutment surface (21, 22) for the respective in formed the closure (3), and wherein the radial abutment surface (21) for at least frictionally holding the respective closure (3) in the receptacle (20) is at least partially formed by at least one movable segment (17) which at least in the region of the radial contact surface (21) at least radially to the axis (KA) of the receptacle (20) is movable, characterized in that the axial contact surface (22) at least partially on d at least one movable segment (17) is provided, and in that the at least one movable segment (17) is guided or mounted on a closure head base (11) in such a way that a pressure force (F) exerted on the axial abutment surface (22) relative to the axis (KA) of the receptacle (20) causes radially inwardly acting clamping force (F ') of the movable segment (17).

2. Closing head according to claim 1, characterized in that the head piece (16) consists of at least two, preferably at least three of the receptacle (20) forming movable segments (17).

3. Closing head according to claim 1, characterized in that the head piece (16) consists of at least four movable segments (17).

4. Closing head according to one of the preceding claims, characterized by at least two segments (17), which add to a sleeve-like head piece (16) with an open at the top side (16.2) and on a head piece top (16.1) sleeve opening (19) the receptacle (20) for the at least one closure (3) is formed by an opening section (19.2) of the sleeve opening (19) having an enlarged cross-section and an opening section at the upper end (16.1) of the head section (16) (19.1) connects with reduced cross section, and that the radial bearing surface (21) of the inner surface of the opening portion (19.2) are formed with a larger cross-section and the axial bearing surface (22) of a stepped transition between the first and the second opening portion (19.2, 19.1).

5. Closing head according to one of the preceding claims, characterized in that the at least one movable segment (17) about at least one pivot axis (24) perpendicular to the axis (KA) of the receptacle (20) on the Verschließerkopfbasis (11) is held.

6. capper head according to claim 5, characterized in that the pivot axis (24) of the at least one movable segment (17) from the axis (KA) of the receptacle (20) has a radial distance (X) which is greater than the radial distance (x) the axial abutment surface (22) from this axis (KA).

7. Closing head according to one of the preceding claims, characterized in that the at least one movable segment (17) at least one, preferably at least two spaced-apart holder arms (23) which protrude beyond the outer surface of the segment (17) and with which the segment (17) is pivotally supported on the capper head base (11).

8. Closing head according to one of the preceding claims, characterized in that the Verschließerkopfbasis (11) on the closing tool (6) attachable base portion (12) and at least two on a head piece facing the underside of the base portion (12) wegstehende bearing elements (13) between which the at least one movable segment (17) is pivotally mounted.

9. capper head according to claim 8, characterized in that the base portion (12) with a plurality of bearing elements (13) is formed, each distributed at the same radial distance from the axis (KA) of the receptacle (20) about this axis at equal angular intervals are, and that in each case between two adjacent bearing portions bearing elements (13) at least one movable segment (17) is pivotally mounted.

10. Closing head according to one of the preceding claims, characterized in that with several movable segments (17) these identi are formed, and / or that the closing head (10) including its base member (11) and its head piece (16) mirror-symmetrical to at least one axis (KA) of the receptacle (20) enclosing plane is executed.

11. Closing head according to one of the preceding claims, characterized in that the at least one movable segment (17) is biased by spring means (26) in the radially inner position.

12. Closing head according to claim 11, characterized in that the spring means (26) in the vicinity of the underside (16.2) of the head piece (16) in a compelling manner on the at least one movable segment (17) is mounted or acts on this and in particular, the spring means (26) is an O-ring.

13. Closing head according to claim 11, characterized in that the spring means (26) in the vicinity of the top (16.1) of the head piece (16) is arranged and in a spreading manner on the at least one movable segment (17) is mounted or on this interacts.

14. Closing head according to one of the preceding claims, characterized in that the closures screw caps (3).

15. Container closure machine for closing bottles or similar containers (2) with closures, for example with screw caps (3), with one or more Verschließpositionen (5), each of which at least one closing tool (6) with a one receptacle (20) for each A closure head (10) forming a closure (3), characterized in that the closure head is designed according to one of the preceding claims.

16. Behälterverschließmaschine according to claim 15, characterized in that a plurality on a about a vertical machine axis (MA) circumferentially driven rotor (4) formed closing positions (5) are provided, each of which at least one closing tool (6) with a recording (20 ) for each closure (3) forming a closing head (10), which is designed according to one of the preceding claims 1 to 16.