RO130057B1 - Device for quickly screwing the cap on a glass or pet container - Google Patents

Abstract

The invention relates to a device for quickly screwing the caps on glass or PET containers, the device being mounted on the filling equipments in the food, chemical, pharmaceutical, cosmetic fields and the like. According to the invention, the device consists of a system () for supplying the caps (), located above the working area in a recess of conjugated shape cut into a support piece (), the cap () being lowered up to the lower edge of a pair of tweezers (), by a mandrel () actuated by a pneumatic actuation system (), the tweezers () having an axial channel of cylindrical shape cut therein to guide the cap () and, at the lower side, having a series of jaws which have in the inside a shape conjugated to the shape of the cap, and, outside, a conical surface, in contact with a surface of conjugated shape cut in the inside of a screwing sleeve () where, under the action of a spring (), the jaws of the tweezers () are deformed and ensure the clamping of the cap () by the tweezers () in order to place the cap () on the neck of the container (), the assembly formed by the driving plate (), the guide rods () and the screwing head () will move on the vertical in relation to the support piece () in some axial bearings (), at the intervention of the pneumatic actuation system () on a distance established by the construction; concomitantly with the descending motion, the screwing sleeve () starts to perform a rotary motion necessary to screw the cap () onto the container, the necessary revolving couple being produced by an electric motor () and being transmitted to the screwing sleeve () by means of a gear with toothed wheels (), and, after reaching the pre-established screwing couple, the action of the electric motor stops and the pneumatic actuation system () controls the return of the screwing head assembly to the initial position.

Description

Everyone has the right to file in writing and motivated, at OSIM, a request for revocation of the patent, within 6 months from the publication of the mention of the decision granting it

RO 130057 Β1

The invention relates to a fast screw cap device on a high-speed glass or PET container, which is to be mounted on filling equipment in the food, chemical, pharmaceutical, cosmetic and other fields.

It is known, from US document 4939890 A, a device for screwing caps on a container, provided with a system for fastening and securing the position of the container, and a system for feeding caps and threading them. The feeding with caps is made by means of a star-shaped wheel, provided with a slot for the output of a lid, for fixing and positioning it in an axial direction with the neck of the container, the wheel being lowered to the position of threading through a system of axles, the threading being realized by turning the wheel.

There is also known the document US 2009145083 A1, which refers to a screw cap device on a container fixed and positioned next to it, a device that is actuated, by means of an axle and gears, by an electric motor.

There are known devices for screw cap on a container (EP 0889002 A1 -1999, WO 2014071467 A1), provided with one or more workstations.

The disadvantage of these devices is that they are complicated from a constructive point of view.

The technical problem that the invention solves is to make a device that simultaneously performs the centering and threading of a lid on a container. The rapid screw cap device on a glass or PET container, according to the invention, eliminates the disadvantages of known solutions by having a pneumatic drive system, which drives a spindle that pushes the cap, taken from a support piece, up to the lower edge of a tweezers that is conjugated with a screw bush, and under the action of a spring, the tweezers deform and secure the catch and hold the lid during lowering to the neck of the container, provided by an assembly formed by an actuating plate, some rods guide, a screw head, guided by axial bearings, and actuated by an actuation system, on a predetermined distance, and at the same time with the movement of descent, the screw bushing also has a rotational movement, necessary to screw the lid on the container, the required torque being produced by an electric drive motor, and transmitted c to the screw bushing by means of a gear transmission. The tweezers have an axial channel, cylindrical in shape, which guides the lid, at the bottom it presents a series of jaws, which have inside a conjugated shape to the lid, and on the outside it has a conical surface, in contact with the conjugated surface, practiced on the inside of the screw cap. After reaching the prescribed torque, the action of the electric motor stops, and the pneumatic drive system controls the movement of the screw head assembly to its initial position.

The device according to the invention has the following advantages:

- the reduction of the total capping time, due to the fact that the capping is done concurrently with the screwing of the previous cap;

- simplification of the device by eliminating the mechanisms of positioning the lid (pick & place or pivoting of the capping module).

Following is an example of embodiment of the invention and in connection with FIG. 1 ... 3, which represents:

FIG. 1, an overview, in perspective, of the fast screw device, with partial section;

FIG. 2, an overview, in perspective, of the fast screw device, with partial section, in another working phase;

FIG. 3, an overview, in perspective, of the fast screw device, with partial section, in another working phase.

RO 130057 Β1

The device according to the invention is provided with a supply system 2 with caps 1 1, positioned above the working area, known per se. Upon exiting the feed system, the lid 1 is positioned above the work area, in a conjugate shaped release, practiced 3 in a support piece 3, which is part of the device support. After the positioning of a container 4 (to be sealed) in the active area has been carried out by a container system 5, itself known, the lid 1 is lowered to the lower edge of a tweezers 5, by a thorn. 6, under the action of a pneumatic drive system 7

7. The tweezer 5 has a cylindrical axial channel, which guides the lid 1, and at the bottom shows a series of jaws that have inside a shape conjugated to the lid, and on the outside 9 has a conical surface, in contact with a surface of conjugated shape, practiced inside a screw bush 8. The tweezers 5 can move axially in the screw bush 11

8. The conical contact between the outer surface of the tweezers 5 and the inner surface of the screw bush 8 is provided by a spring 9. Under the action of the spring 9, the jaws of the tweezers 5 become deformed and ensure the lid is secured in the tweezers 5. The screw cap 8 is extended in - a radial-axial bearing 10, inside a screw head 11, which is mounted integrally, 15 by means of two guide rods 12, with an actuating plate 13, which is, in turn, under the action of a pneumatic drive system 14. 17

The guide rods 12 have the possibility of vertical movement with respect to the support part 3, being extended therein in two axial bearings 15. To realize the placement of the cover 1 on the neck of the container 4, the assembly formed by the actuator plate 13, the guide rods 12 , the screw head 11 (together with the enlarged components inside it) will move 21 vertically relative to the support part 3, in some axial bearings 15, at the intervention of the pneumatic drive system 14, over a distance established by the construction. 2. 3

At the same time as the lowering movement, the screw bush 8, widened inside the screw head 11, begins to acquire a rotational movement, necessary for screwing the stopper 25 on the container. The required torque is produced by an electric drive motor 16, and is transmitted to the screw bushing 8 by means of a gear wheel, respectively, 27 a gear wheel 17, mounted on the motor shaft, and an intermediate gear wheel 18 , widened on the support of the device, in a radial-axial bearing 19, and a cogwheel driven 29 20, fixedly attached to the screw nut 8. As a constructive variant, the drive wheel 17 may be missing, it being replaced by the intermediate wheel 18, mounted this time even on the shaft 31 of the motor 16, which would lead to constructive simplification, by eliminating the bearing 19, but would additionally load the electric motor bearings 16. 33

The intermediate gear 18 is of sufficient width to allow contact between its teeth and those of the driven gear 20 throughout the entire vertical stroke of the latter 35, so as to allow transmission of the torque from the motor to the screw bushing 8 on the entire duration of the positioning and screwing phase of the cover 1. 37

After reaching the prescribed torque, the action of the electric motor stops, and the pneumatic drive system 14 commands the displacement of the head assembly - 39 bars (formed by the screw head 11, the screw bushing 8, the radial-axial bearing 10, the tweezers 5 and the spring 9). to the starting position. The vertical displacement of the screw bush 8 41 leads to the release of the conical contact between it and the tweezers 5, allowing the jaws of the tweezers to release the plug, so that the sealed container can be removed from the working area. 43

After the screw head assembly has reached its initial position, the entire working process is resumed. 45

Claims (3)

claims 1. Quick lid screwing device on a container, provided with a feed system (2) with caps (1), positioned above the work area, characterized in that it has a pneumatic drive system (7), which drives a spindle (6) that pushes the cover (1), taken from a support piece (3), to the lower edge of a tweezers (5) which is combined with a screw bush (8), and under the action of a spring (9), the tweezers (5) are deformed and ensure that the lid is gripped and held during lowering towards the neck of the container (4), provided by an assembly formed by an actuating plate (13), guide rods (12), a screw head (11), guided by axial bearings (15), and actuated by an actuation system (14), on a predetermined distance, and at the same time with the lowering motion, the screwing bush (8) also has a movement of rotation, necessary to screw the lid on the container, with the required rotation torque is produced by an electric drive motor (16), and transmitted to the screw bush (8) by means of a gear transmission (17, 18, 20). Device according to claim 1, characterized in that the tweezers (5) have a cylindrical axial channel that guides the lid (1), at the bottom of which has a series of jaws having a shape conjugated to the lid, and on the outside it has a conical surface, which is in contact with the conjugated surface, practiced inside the screw bush (8). Device according to claim 1, characterized in that, after reaching the prescribed torque, the action of the electric motor (16) ceases, and the pneumatic drive system (14) controls the movement of the screw head assembly to its initial position.