WO1995023098A1

WO1995023098A1 - Childproof screw closure with integral filler opening

Info

Publication number: WO1995023098A1
Application number: PCT/DE1995/000199
Authority: WO
Inventors: Jürgen Schick
Original assignee: Joh. A. Benckiser Gmbh
Priority date: 1994-02-24
Filing date: 1995-02-16
Publication date: 1995-08-31
Also published as: ES1029119U; EP0746513A1; AU1753695A; ES1029119Y; IL112694A0; DE9403102U1

Abstract

The invention concerns a screw closure which is both resistant to overturning and childproof, in particular a closure for bottles containing cleaning liquids. The closure comprises a spout, fitted to the bottle, with a double external thread (25), radially spreading catches (27) moulded on the spout and a screw cap (37) designed to be expanded by the catches (27), the cap having an outer shell (47) with moulded cap-expansion wedges (51) and a separate threaded section (39) with a double internal thread (41) which matches the external thread (25) on the spout. The turns of the external thread (25) are disposed on an ring (23) in such a way that each encompasses an angle of 180° and they do not overlap or only overlap slightly. Sills (33) are disposed between the catches (27) and the ring (23) and the separate threaded section (39) has oppositely disposed wedge-shaped notches (43) with contact edges (45, 53) which abut the sills (33) when the cap is screwed on, the notches acting as an overturn-prevention device. The closure is characterized in that the spout consists of a baseplate (19) located on the container and carrying the ring (23), the catches (27) and the sills (33), plus a reducer (1) detachably fitted in the ring (23).

Description

Childproof screw cap with integrated refill opening

The invention relates to a screw cap for vessels which is resistant to overturning and secure for vessels, in particular for storage bottles containing cleaning fluids, consisting of a spout arranged on the vessel with a first two-start external thread and molded radial-spreading catches and a screw cap which can be expanded by the catches an outer shell molded widening wedges and a separate threaded piece with a first two-start internal thread, which corresponds to the first external thread of the spout, the gears of the first external thread being arranged on a ring so that they each encompass an angle of ≤ 180 ° and do not or or only slightly overlap, are arranged between the radially spreading catches and the ring sleepers, and the separate threaded piece, as an overturning protection, has opposite wedge-shaped incisions with abutting edges in the screwed-on state on the sleepers n owns.

Such a screw closure is known from European patent specification 0 257 481. Screw caps of this type are used to close vessels, on the one hand providing effective child safety for the screw cap.

REPLACEMENT LEAF should be achieved and on the other hand a simple production, in particular by an injection molding process, is possible. However, the known screw caps have the disadvantage that the spout formed on them has an outlet opening of relatively small diameter, which is matched to the contents of the vessel and the usually desired amount to be dispensed. In the course of a sensitized environmental awareness of the consumers and the resulting striving for saving packaging materials, the above-mentioned containers should be refillable today. The refilling of the containers via the known screw caps is very difficult and with the help of additional elements, for example a funnel, because larger quantities of material can only be filled into the container very poorly through the relatively small dispensing opening of the spout.

The object of the present invention is to overcome the known disadvantages and to provide a screw cap which, on the one hand, is easy to manufacture, includes a childproof lock and, on the other hand, enables the devices equipped with this screw cap to be refilled easily and quickly, none at all additional aids are required.

This object is achieved in that the spout consists of a base plate carrying the ring, the catches and the sleepers, which is arranged on the vessel, and a reducer which is detachably inserted into the ring. This offers the advantage that the reducer is removed from the ring before the vessel is refilled, as a result of which a large opening is available for refilling, and a smaller opening after refilling by reinserting the reducer into the ring. which is matched to the imported good and the usual delivery quantities, is available for portion-wise removal of the good from the vessel.

An advantageous embodiment is characterized in that the ring has a second internal thread on its inside

REPLACEMENT LEAF carries, into which the reducer provided with a corresponding second external thread is screwed. This provides a connection between the reducer and the ring which is also leak-proof and which can be released without aids.

A second embodiment has a reducer, which is connected to the ring by a hinge and essentially closes the latter in the form of a cover in the working position. The working position is to be understood as the position of the reducer, in which the small discharge opening is the only opening in the vessel and the large refill opening is closed by the reducer itself. The aforementioned embodiment offers the advantage of particularly simple manufacture, since no second threads are required.

In an expedient embodiment, the reducer has a bead which in the working position engages behind a locking edge arranged on the ring. This means that when the reducer is placed or screwed into the ring, an additional engagement of the bead behind the locking edge is required, as a result of which the tightness of the connection is increased and automatic loosening of the reducer from the ring is excluded.

In a particularly preferred embodiment, the reducer has a substantially cylindrical shape, with one end of the cylinder being closed by a disk which has an outlet opening in its center, which has a smaller diameter than the opposite opening of the cylinder, and opens into a pouring spout which rises tubularly over the pane.

Further advantageous embodiments result from patent claims 6 to 10.

Further advantages, details and further developments of the invented

REPLACEMENT LEAF screw cap according to the invention result from the description of preferred exemplary embodiments with reference to the drawing. Show it:

Figure 1 is a reducer with an external thread in a partially sectioned side view.

FIG. 2 shows the reducer from FIG. 1 in a top view from above;

3 shows a base plate of a spout in a partially sectioned side view;

FIG. 4 shows the base plate from FIG. 3 in a top view from above;

5 shows a screw cap in a sectional side view;

6 shows the screw cap from FIG. 4 in a top view from below;

Fig. 7 shows a second embodiment of the base plate with the reducer, which is attached to the base plate via a hinge, in a sectional side view.

1 shows a reducer 1. The reducer 1 has an essentially cylindrical shape with a cylinder wall 3, on the outside of which an external thread 5 is attached. In the example shown, the external thread 5 is a three-start thread with a pitch of approximately 3 mm. The upper end face of the cylinder forming the lower part of the reducer is closed by a disk 7 in a large area of the cylinder opening. In its peripheral area, the disk 7 is widened to form a toothed ring 9, the teeth of which serve for secure gripping and easy screwing of the reducer. In the middle of the disk 7 there is an outlet opening 11, the diameter of which in the example is approximately 38% of the diameter of the cylinder forming the lower part of the reducer. The outlet opening 11 in turn opens into a tubular pouring spout 13, which extends a small amount over the

REPLACEMENT LEAF Disc 7 rises. Furthermore, a bead 15 is arranged on the reducer 1 on the outside of the cylinder wall 3 between the washer 7 and the external thread 5 and extends slightly over the height of the external thread 5.

2 that the ring gear 9 runs along the entire circumference of the disk 7. However, other embodiments are possible in which special grip points are only present at a few points. The pouring spout 13 ends with a drip edge 17, which also serves as a guide for a corresponding counterpart in the screw cap to be described later.

Fig. 3 shows a base plate 19 which acts in connection with the reducer 1 as a spout. The base plate 19 is equipped with locking elements 21 and 22, which serve to fasten the base plate to the vessel. Centered on the base plate 19, at a radial distance from the outer boundary, a ring 23 rises, on the outer wall of which a further external thread 25 is arranged. The external thread 25 consists of two half gears, which do not overlap or only slightly overlap, i.e. the upper edge of the first half thread starts below the lower edge of the second half thread. Latches 27 are also arranged on the base plate 19. On the inner wall of the ring 23 there is a three-start internal thread 29 which interacts with the external thread 5 when the reducer 1 is screwed into the ring 23. On the top

Edge of the inner wall of the ring 23 is a locking edge 31 which is designed as a narrow bead. When the reducer 1 is fully screwed in, the bead 15 snaps beneath the locking edge 31, which ensures a particularly tight fit of the reducer and prevents automatic loosening.

In the plan view of the base plate 19 shown in FIG. 4, in the immediate vicinity of the catches 27 sleepers 33 can be seen, which are slightly above the level of the slat

REPLACEMENT LEAF 19 raise. The catches 27 are wedge-shaped in a known manner and have an indentation 35.

The closure part of the screw closure is formed by a screw cap 37 shown in FIG. 5. The screw cap 37 has a separate threaded piece 39, at the lower end of which a further internal thread 41 is arranged, which cooperates with the external thread 25 of the base plate when the screw cap 37 is screwed onto the spout. The threaded piece 39 ends at its lower end in two wedge-shaped cuts 43, which are arranged opposite each other and each form a butt edge 45, which in turn abut the sleepers 33 of the base plate 19 when the screw cap is screwed on and overtighten the screw cap prevent. The screw cap 37 furthermore has an outer casing 47 and a closure piece 49 arranged in the center of the threaded piece 39. The closure socket 49 engages in the pouring socket 13 of the reducer when the screw cap is screwed on and brings about a tight closure.

In the top view of FIG. 6 it can be seen that on the inside of the outer shell 47 there are opposite expansion elements 51. When the screw cap 37 is screwed onto the spout, the expanding wedges 51 run onto the wedge-shaped front surfaces of the catches 27 and thereby slightly deform the outer shell 47, as a result of which the expanding wedges 51 move past the catches 27 and snap into the indentations 35. Removing the screw cap

37 is then only possible in that the outer casing 47 is pressed together at two pressure points 52, which are each offset by 90 ° to the expanding wedges 51, as a result of which the outer casing 47 is deformed and the expanding casing 51 is moved outwards , and the screw cap is turned in the counterclockwise direction in order to move the expanding wedges 51 past the catches 27. In order to ensure permanent functioning of the over-rotation protection, the abutting edges 45 are reinforced by abutting plates 53.

REPLACEMENT LEAF Fig. 7 shows a second embodiment of the spout, which consists of the reducer 1 and the base plate 19. This embodiment has a simpler structure and is suitable, for example, for use on containers in which powdered material is stored. In this embodiment, the reducer 1 and the base plate 19 are connected to one another via a hinge 55, which enables the reducer 1 to fold. In addition, on the side of the reducer 1 opposite the hinge there is a snap-in wedge 57 which serves as a locking element when the reducer is closed. The internal thread within the ring 23 and the external thread on the reducing piece 1 are therefore absent in this embodiment. Otherwise, the explanations given for the previously described embodiment apply.

REPLACEMENT LEAF

Claims

claims

1. Overturn-resistant, childproof screw cap for vessels, in particular for storage bottles containing cleaning liquids, consisting of a spout arranged on the vessel with a first two-start external thread (25) and molded radial-spreading catches (27) and one of the catches (27) expandable screw cap (37) with expansion wedges (51) formed on an outer shell (47) and a separate threaded piece (39) with a first two-start internal thread (41) which corresponds to the first external thread (25) of the spout, the gears of the first External threads (25) are arranged on a ring (23) in such a way that they each encompass an angle of <180 ° and do not overlap or only slightly overlap between the radially spreading catches (27) and the ring (23) sleepers (33) are arranged and the separate threaded piece (39) as an overturning protection opposite wedge-shaped incisions (43) with screwed in State on the edges (45, 53) abutting the sleepers (33), characterized in that the spout consists of a base plate (19) carrying the ring (23), the catches (27) and the sleepers (33). , which is arranged on the vessel and has a reducer (1) detachably inserted in the ring (23).

2. Screw cap according to claim 1, characterized gekenn¬ characterized in that the ring (23) carries on its inside a second internal thread (29) into which the reducer (1) provided with a corresponding second external thread (5) is screwed.

3. Screw closure according to claim 1, characterized gekenn¬ characterized in that the reducer (1) via a hinge (55) is connected to the ring (23) and this in the working position in the form of a cover essentially

REPLACEMENT LEAF Chen closes.

4. Screw closure according to one of claims 1 to 3, characterized in that the reducing piece (1) has a bead (15) which engages behind a locking edge (31) arranged in the ring (23) in the working position.

5. Screw closure according to one of claims 1 to 4, characterized in that the reducer (1) has a substantially cylindrical shape, an end face of the cylinder being closed by a disk (7) which has an outlet opening (11th) in its center ) which has a smaller diameter than the opposite opening of the cylinder and opens into a pouring spout (13) which rises in a tubular shape over the disc (7).

6. Screw closure according to one of claims 1 to 5, characterized in that the pitch of the first internal thread (41) and the first external thread (25) is 0, 5 mm.

7. Screw closure according to one of the claims 1 to 6, characterized in that it is produced by injection molding.

8. Screw closure according to one of claims 1 to 7, characterized in that it consists of polypropylene.

9. Screw closure according to one of claims 1 to 8, characterized in that on the abutting edges (45) abutment plates (53) are integrally formed.

10. Screw closure according to one of claims 1 to 9, characterized in that the sleepers (33) and the catches (27) have a thickness of about 2 mm and that the sleepers (33) have a width of at least about 1 mm .

REPLACEMENT LEAF