DE8316567U1 - DEVICE FOR TESTING HOLLOW GLASSES, ESPECIALLY BOTTLES, FOR DAMAGE IN THE MOUTH AREA - Google Patents

Description

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Conto co ntrol B raschos KG ^ *

5 9 00 victories

VNR; 106836 \\

Device for testing hobl glasses,

especially bottles, on damaged areas

in the mouth area

In the beverage industry, besides new glass bottles predominantly returnable or return bottles used with screw and crown cap closures. The bottles are subject to final checks before being filled for soiling j damage and lye residues in the area of the mouth, the side wall and the bottom.

When checking the bottle mouth and the Ge-Wind there are considerable difficulties at the bottle mouth. Since most of them are on bottles bottled liquids to carbonated liquids is, even slight splinters on the sealing surface of the bottle mouth, which the open bottles on the way from the consumer back to the beverage manufacturing plant suffer to this To make bottles worthless for further use. Chips lead to both when filling as well as during transport as well as with longer storage time carbonic acid and also liquid from the Bottle escape, as both screw and crown cork closures are in the bottom area of the closure cap or the crown cork only a very thin layer of sealing material is applied, which is not in is capable of bumps as a result of chipping equalize on the sealing surface of the bottle mouth.

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Damage in the thread area of screw cap bottles are particularly serious. Broken thread flanks will still be removed when the bottles are closed again further destroyed by the fact that the thread rolling head of the capsule sealing machine the thread of the cap firmly rolls into the damaged areas. When opening the bottle will be then further glass particles torn from the thread, which initially get stuck on the inside of the capsule when twisting off, when the consumer has opened the bottle with exertion, and then easily into the bottle when lifting the unscrewed cap or when pouring it to fall into a drinking vessel. Because of the risk of internal injuries from broken glass, bottle manufacturers Increased efforts have been made to improve the screw-top bottle.

Exclusively | borrowed optoelectronic test equipment used according to the Work with fluoroscopy or the reflection method.

In one working according to the fluoroscopic method

Checking means for detecting defects in glass bottles (US-PS 3,384,235) is lowered, an infrared radiator in the test, rotating bottle, wherein an up synchronously with the infrared emitters in '\ direction of the bottles longitudinal axis outside of the bottle and abbewegende photocell the infrared beam records. The measuring principle is that the bottle wall is penetrated by radiation, with deviations from the nominal wall thickness or the presence of a defect in the glass higher or lower brightness values result due to the higher or lower light absorption depending on the wall thickness or the damaged area or triggered by this. As the bottle rotates around its longitudinal axis, the emitter and photocell are moved axially to the bottom of the bottle and back.

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In this way the entire body of the bottle is scanned. The known device is predominantly fllr the rough measurement of hollow glass wall thicknesses. Material missing in the wall should also be detectable by means of the known device.

For finer splinters in the joint area »especially on the highly sensitive sealing surfaces ₅

Ü does not necessarily respond to the known device,

since the test is limited to a radiography, '[ΙΟ by the possibly existing smaller splinterunqen are not detectable in the mouth and thread area.

In a further test device working according to the fluoroscopy principle (DE-OS 27 24 248) run through the bottles run a test track on a conveyor belt, on one side of which there is a light generator and these are opposite Photocells on the other side of the conveyor belt to scan the contours, the height and the mouth area of bottles for dimensional accuracy and damage are arranged. This test facility also has the above-mentioned shortcomings of the disadvantage on that the bottle areas located in the direction of belt travel including the muzzle insufficiently x-rayed so that the error detection in these areas is only inadequate.

Furthermore, one that works on the principle of reflection Test device (DE-OS 24 11 723) known for bottles that has a mounted on a rotating support laser light source, which by means of a convex mirror ring-shaped inspection area sweeping over the bottle mouth generated. The light rays reflected by the bottle mouth are generated by a photoelectronic component, E.g. a photocell, received, the errors in the bottle opening area. the changing light intensity

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recognizes the reflected rays. The serious one The disadvantage of this test device is that so-called Shell fractures in the mouth area of the bottle cannot or can only be recognized with difficulty.

All optoelectronic test equipment is the Common defect that e.g. a sharp-edged and / or thicker formation of the bottle seam, irregularities as well the protruding thread start on bottles with screw cap can lead to false detection in the area of the mouth. Another disadvantage of the optoelectronic Test equipment consists in the fact that residual water droplets on the cleaned bottles cause special light refractions, which simulate an irregularity in the thread or on the sealing surface in the mouth area, so that high Sorting rates are recorded on flawless bottles. Furthermore, the great expense of electronic Components such as microprocessors and the like an expensive production price of the optoelectronic Test equipment result. In addition, the error detection for colored bottles prepares with optoelectronic Test facilities considerable difficulties. In the end error detection by means of optoelectronics is still needed Devices, possibly due to the quality of the glass, e.g. with lead additives in the glass, if certain wavelengths of light are absorbed by the glass.

The innovation is based on the task of a device for testing hollow glasses, especially bottles, to develop damage points in the mouth area, which a the highest level of security in error detection guaranteed.

According to the innovation, this task is achieved by a test device solved with the features in the characterizing part of claim 1 protection.

Appropriate configurations of the innovation are the subject of the subclaims.

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The inventive test device in.Form a mechanical scanning device determines damaged areas in the mouth area of bottles with absolute certainty and separates a false detection due to dimensional deviations of the bottles by a movable or. floating mounting of the sensors that sweep the mouth area of the bottles and that follow the out-of-roundness at the mouth of the bottle without triggering a positioning movement that generates an error signal.
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The innovation is explained in detail below with reference to an exemplary embodiment shown schematically in the drawing. It each show a schematic representation
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Fig. 1 shows the test device according to the innovation in

the top view,
FIG. 2 shows a section along line H-II of FIG. 1 in an enlarged representation to illustrate a scanning device for bottles with screw caps; Fig. 3 shows the plan view of the scanning device according to

Fig. 2 and

FIG. 4 shows a section along line IV-IV of FIG. 2 in an enlarged illustration.

The main components of the test device are a rotary conveyor in the form of a rotary table 1 on its circumference mechanical scanning devices 2 for checking the coin tion area of bottles 3 arranged on damaged areas are, an inlet star 4, which takes over the bottles to be tested from a screw conveyor 5, and an output star 6 with a sorting device (not shown)

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direction that the flawless bottles on a conveyor belt 7 and leading to a filling machine diverts the damaged bottles onto a conveyor belt 8, which leads to a collection point. 5

On the periphery of the rotary table 1 24 are recesses 9 arranged for receiving the bottle neck 10 ά ^ τ to be tested, for example, bottles 3 that are rotatably supported by attached to the rotary table 1 support roller pairs. 11

Along the bottle orbit of the rotary table 1 three tensioning belts 13 are arranged, which are driven in arrow 1 direction a counter to the direction of rotation b of the rotary table 1 are and set the bottles 3 in a rotation in the direction of arrow c about their longitudinal axis.

Each of the 24 bottle receptacles 9 is a scanning device 2 mounted radially on the revolving table 1 assigned for bottles 3 with screw cap. The scanning device 2 has a swivel bracket 14, at the outer end of which a probe head 15 with sensor elements 16 is arranged for scanning the sealing surface 17 on the bottle mouth. The bracket 14 is with its inner end limited in a plane perpendicular to the plane of the rotary table in a bearing block 18 around the horizontal axis of rotation 18a-li? a pivotally mounted, which is attached to a swivel plate 19, which on the Umlauftiscn 1 to the vertical Axis of rotation 19a-19a is mounted so as to be pivotable to a limited extent in a plane parallel to the plane of the turntable. The interchangeable one Probe 15 is in the outer end of the swivel bracket 14 in the longitudinal direction of the same in arrow direction d-e by stops 20, 20 mounted so that they can move to a limited extent, so that due to the probe head 15 caused by the production un-

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roundness of the bottles 3 can be compensated. The sensors 16 are perpendicular to the longitudinal axis of the temple in the probe head 15 resiliently supported. The swivel bracket 14 is in the operating position 14 ′ by spring elements 21 printed with the probe 15 against the bottle mouth.

A holder 22 is also located on the swivel plate 19

for a second probe head 23 with radially to the axis of rotation of the rotary table 1 resiliently built-in sensors 24 for Scanning the thread 25 attached to the bottles 3.

If a damaged area occurs on the sealing surface 17 and / or on the thread 25 of the bottles 3, the swivel bracket 14 with the probe head 15 and the holder 22 with the probe head 23 by rotating in the direction of arrow c Bottle 3 against the force of a return spring 26 for a short time is deflected into position 14 ″ (FIG. 3). As a result of the swaying or adjusting movement of bracket 14, a Proximity switch 27 actuated, the one on the inside The end of the swivel bracket 14 activates the electromagnet 28, which switches the swivel bracket 14 into the inoperative and error indicator 14 "'from the bottle mouth swings up.

If the neck 10 of a bottle 3 is missing, the swivel bracket 14 is briefly moved out of the operating position 14 'by the spring 21 against the force of the return spring 29 Position 14 "" is printed in which the proximity switch 30 is actuated, which in turn switches on the electromagnet 28, which returns the swivel bracket 14 to the inoperative and error indicator position 14 "'pivots.

Along the bottle orbit of the rotary table 1 are - Seen in the direction of rotation of the table "an initiator in front of the inlet star 4 for switching on the electromagnet 28 for lifting the bracket 14 of the scanning devices 2 in the

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Inoperative position 14 '' ', an initiator 32 behind the Infeed star 4 for switching off the magnets 28 for lowering the bracket 14 into the operating position 14 'for testing of the mouth area of the bottles 3 coming from the inlet star 4 onto the rotary table 1 and an initiator 33 arranged, which can be actuated by a bracket 14 located in the inoperative and error display position 14 '' ' is to a sorting device, not shown turn on for the faulty bottles. The initiators 31-33 are designed as proximity switches.

In the area of the bottle circulation path of the rotary table 1 Test devices for checking the bottom and / or walls and / or lye of the bottles 3 can also be arranged. 15th

When testing crown cork bottles, the scanning head 23 of the scanning devices 2 is omitted.

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Claims (7)

PATENT Attorney * Friedrich-Ebert-Str. 27 Telephone (0271) 331970 Telegram address: Patschub, Siegen 83 358 Pü / u -3. JUN11983 Conto control Braschos KG. VNR: 106836 protection claims 1. Device for testing hollow glasses, especially bottles, for damage in the mouth area, marked by a rotary conveyor in the form of a rotary table (1) with recesses arranged on the circumference (9) for receiving the bottle neck (10), in the middle and the bottom area of the bottles (3) on the rotary table (1) attached support rollers (11) for rotatable support of the bottles (3), arranged along the bottle circulation path, the bottles (3) in rotation about their longitudinal axis offsetting straps (13) or rolling railings and a zu- um. a discharge conveyor (star wheels 4, 6) and mechanical scanning devices arranged on the rotary table (1) (2) for each bottle holder (9) with movably mounted sensors that scan the bottle mouth (16, 24), which cause an error signal to be generated by defective points in the mouth area of the rotating bottle (3) Experience adjusting movement. 2. Apparatus according to claim 1, characterized in that the scanning nri chtungen (2) have a swivel bracket (14), in the outer end of which a probe head (15) with sensor elements (16) for scanning the sealing surface (17) on the flask ' ündung is movably mounted in Bügellängsri chtuna, wherein the bracket (14) is pivotably mounted in planes parallel and perpendicular to the plane of the rotary table and in the operating position (14 ¹ ) by spring elements (21) with the probe (15) against the mouth area of the bottle (3) is printed, furthermore an electromagnet (28) for lifting the bracket (14) in an inoperative, and error display position (14 "') and by 5 LeIl movements of the bracket (14) operated switch (27 _S 30) for the Magnets (28), 3. Apparatus according to claim 1 and 2, characterized by a further probe head (23) with resiliently arranged sensors (24) for scanning the thread (25) on the bottle mouth, the (23) in a plane parallel to the turntable Level is pivoted.
10 4. Device according to one of Claims 1 to 3, characterized in that the switching device for the actuating magnet (28) of the swivel bracket (14) is designed as a contactless switch (27, 30). 5. Device according to one of claims 1 to 3, characterized by a touch switch for switching on the actuating magnet (28) for the swivel bracket (14). 6. Device according to one of claims 1 to 5, characterized by - in the direction of rotation (b) of the rotary table (1) seen - a switch (31) in front of the feed conveyor (4) for switching on the magnets (28) for lifting the bracket (14) in the inoperative position (14 "'), a switch (32) behind the feed conveyor (4) to switch off the magnets (28) for lowering the bracket (14) into the operating position (14 ') as well as a through in the external operating and error display position (14 "') located bracket (14) actuatable switch (33) for a sorting device for faulty bottles, the switches (31-33) as Contactless switches formed and along the bottle orbit are arranged around the rotary table (1). 7. Device according to one of claims 1 to 6, characterized by in the area of the bottle circulation path of the rotary table (1) arranged testing devices for bottom and / or wall and / or lye control of the bottles (3).