Method and apparatus for dividing glass sheets into parts

(42) Date of commencement of the patent: 15. 9.1997 (45) Date of issue: 27. 4.1998 (51) Int.Cl.⁶ : C03B 33/02 C03B 33/03 (56) Documentation:

DE 3428863A1 US 4454972A

DE 2918331A1 (73) Patent owner:

LISEC PETER

A-3363 AMSTETTEN-HALBMENING, LOWER AUSTRIA (AT).

CD

AT 403 687 (54) METHOD AND DEVICE FOR COATING GLASS PANELS IN CUTS (57) On a glass breaker table (1) are a lifting ledge (12) for breaking scribed glass sheets along y-direction scribing lines and means (30) for breaking the scratches Glass plates along X-direction extending scribe lines provided with conveyor belts (10, 11, 20, 21) are provided to the scribed or To move partially broken glass panels to the various locations of Glasbrechtisches 1.

In addition, edge breaking tools (50 and 60) are associated with the glass breaker table (1), which break off edge strips located outside of zero line corresponding score lines from the glass sheet by twisting these edge strips against the glass sheet. The procedure is such that first the edge strip running in the Y-direction is broken off by the edge breaking tool (50) before the glass sheet is broken along the Y-direction scribing lines and afterwards by the individual glass strips thus obtained, which are along the zero scribe line, which runs in the X direction, located further edge strip from the edge breaking tool (60) is canceled. Only then are the glass strips along the running in the X direction scribe lines divided into the desired blanks and transported away from the conveyor belt (21) of Glasbrechtisches (1).

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KR 0378S1S

AT 403 687 Β

The invention relates to a method for cutting glass sheets in blanks of the desired size.

For the cutting of glass panels, various embodiments of so-called glass cutting tables have already become known. In this connection, EP-A-457 751, DE-PS 39 06 292, DEOS 19 57 601, US-PS 3 979 243 and the essay glass cutting equipment ... in Österr. Glaser Zeitung, Issue 4/1972, pages 19 to 21 are pointed out.

In addition to the actual glass cutting tables, in which the glass panels are scribed according to the desired blanks, devices for breaking on glass cutting tables unilaterally grazed glass panels (Brecht tables) are also known, on which the glass panels are divided by means of levers or on the glass sheet recoatable downers and abutments , known. For example, DE-OS 19 57 601, DE-OS 34 28 863, US-PS 35 70 734, US-PS 36 68 955 and US-PS 32 53 756 are referenced. Another example of a device for breaking glass is described in USPS 36 93 852 or EP-A-340 199.

When dividing glass panels into blanks the externally supplied from the glass factory large glass panels are placed on the Giasschneidetisch and scored according to the desired blanks usually after a constructed optimization. In this case, it is usually necessary to scratch so-called zero lines on the glass panels in order to obtain defined and clean edges of the blanks lying on two edges.

The edge strips of the glass sheets lying outside of the zero cuts were usually broken off by hand and only then did the actual breaking of the glass sheets begin in the Y direction (transverse to the transport plane, so-called traverses) and then in the X direction (in the transport direction).

The invention has for its object to provide a method and an apparatus with which the removal of edge strips along the respective zero lines of scribe lines in the usual cutting of glass sheets and in therefor intended devices can be easily integrated.

According to the invention this object is achieved in a method of the type mentioned, by carrying out the individual process steps in the following sequence: cracks in the glass sheets, wherein, in addition to the cut lines defining the cut lines, two mutually perpendicular zero-cut trimming lines are produced in the region of two edges of the glass sheet which converge towards a corner, Conveying the glass plate so engraved on a break table, Canceling of the edge along the zero-cutting line running transversely to the conveying direction, Dividing the glass sheet along the scribe lines (Y direction) running transversely to the conveying direction, Advancing the individual so obtained, parallel to the conveying direction (XRichtung) aligned scribe lines having glass strips, Canceling the edge along the zero-cutting line running parallel to the conveying direction (X-direction), Dividing the glass strips along the X-direction scribing lines, optionally after the glass strips have been moved to another section of the break table.

Advantageous and preferred embodiments of the method according to the invention are the subject of the dependent claims of claim 1.

For carrying out the method according to the invention, a device with a glass breaker table following a glass cutting table and conveying means for transporting scored glass sheets and the glass sheet table and means for dividing the glass sheet along the X direction and the Y direction scoring lines may be used. which is characterized by in that a edge-breaking tool for separating the edge section along the direction perpendicular to the conveying direction, the scribing line corresponding to the zero cut (Y direction) is provided, daS at a longitudinal edge of Glasbrechtisches as known per se another Randabbrechwerkzeug for separating edge strips along the direction parallel to the conveying direction (X-direction), the zero-cut corresponding scribe lines is provided that each of the tools for separating the edge strips as known per se from below in the region of the score line to the glass sheet or the glass strip can be applied abutment and two from above to the glass sheet or Having the glass strip zugbaren hold-down, and that the engageable in the region of the abutting edge strip hold-down against the other hold-down of the tool is lowered to twist the separated edge strip.

Advantageous and preferred embodiments of the device according to the invention are the subject of dependent claims from claim 8.

With the method according to the invention and with the device according to the invention proposed for carrying out the same, the edge strip with the first edge-breaking tool can be cut along the direction in the Y-direction along the scoring lines (Y-direction, traverses) transverse to the conveying direction extending zero line corresponding scribe line can be easily separated without disturbing the procedure. Then the glass sheet is divided into glass strips by breaking along the Y-directional scribe lines (traverses) and these are separated one after the other

AT 403 687 Β the device for dividing the glass sheet (eg the break line) lying part of the Brecht table promoted. In this case, the second edge breaking tool is effective after a glass strip has been transported to the second part of the Brechtisches to separate the edge strip along the left of this glass strip portion of the scribe line corresponding to the X-direction extending zero line. Then the glass strip, in which only in the X direction extending scribe lines are further promoted and transported to the part of the Brecht table, is divided along this running in the X direction scribe lines of the glass strip into the individual blanks. These blanks are then transported away from the Brecht table.

Further details and advantages as well as features of the method according to the invention and the device according to the invention will become apparent from the following description in which reference is made to the accompanying drawings showing an embodiment. It shows: Fig. 1 in plan view a part of a Glasbrechtisches, Fig. 2 Seen from the bending table, the tool for separating edge strips along the Y direction extending zero line, Fig. 3 against the conveying direction (from the bottom of FIG. 1) seen from the tool for separating edge strips along the X-directional zero line, Fig. 4 a glass panel with scribe line and fig. 5 means for breaking glass strips along X-direction scribing lines.

From a glass cutting table (not shown), glass sheets 3, which for example have the arrangement of scribe lines shown in FIG. 4 and produced on the glass cutting table, are transported in the conveying direction 2 onto the breaking table 1 partially shown in FIG. In this case, the glass cutting table can be designed as described in EP-B-192 920 for transporting scribed glass sheets 3.

The transported in the direction of 2 on the Brecht table 1 glass panel 3 next to running in the Y direction scribing lines 4 and extending in the X direction scribe lines 5 still one of the zero line A corresponding and extending in the Y direction scribe line 6 and one of the zero line B corresponding and in X direction extending scribe line 7, which meet in a corner 8 of the glass sheet 3 to each other.

To transport scribed glass sheets 3 on the press table 1 or to assist in using the glass cutting table according to EP-B-192 920, the support surfaces 10 and 11 of the glass sheet table 1 are formed as moving in the conveying direction 2 endless conveyor belts. These endless conveyor belts 10, 11 can as well as all other conveyor belts (eg 20, 21) may be formed as air-permeable belts, so that a glass sheet 3 to be processed on them by applying negative pressure by the air-permeable conveyor belt 10 and 11 (or 20, 21) can be determined on the break table in the desired position (see. also FR-PS 2 484 393).

Between the two parts of the breaker table 1 formed by the conveyor belts 10 and 11, a crushing bar 12 is provided which, for example, is designed as known from EP-A-457 751. Thus, the crushing bar 12 in the region of FIG. 1 shown, with reference to the conveying direction (arrow 2) left edge (right in FIG. 1) be designed higher than on in FIG. 1 invisible, other end. The crushing bar 12 thus has a from the right of FIG. 1 to the left obliquely sloping, upper edge.

To hold down the parts of the glass sheet 3 located on either side of the crushing bar 12 when it is divided along the scoring lines 4, suckers 13 or alternatively hold-downs 14 that can be operated are provided. The suckers 13 are used when, for example, glass sheets 3 are to be split with a metal coating. Hold-downs of the construction known from EP-A-475 751 can also be used.

The hold-downs 14 are pivotally mounted in supports 15 about axes 16 and can be raised or lowered by rods 17. The to be applied to the glass sheet 3 parts of the hold-down 14 are, for example, cylindrical plastic strips 18, whose axes extend parallel to the image plane of Fig. 2.

With reference to the conveying direction 2, further parts of the breaking table are provided after the part of the breaking table 1 formed by the conveyor belt 11, which parts are provided by a conveyor belt 20 moving in the conveying direction. a conveyor belt 21 which moves transversely to the conveying direction 2. Between the conveyor belt 11 and the conveyor belt 20, a clearance (gap) is provided in which a device 30 for cutting the glass strip 9, as obtained after the splitting of the glass sheets 3 along the score lines 4, determined. This device 30 is on a guide track 31 in the direction of the double arrow 32, ie Movable parallel to the Y direction to align them with the scribe lines 5 in glass strips 9.

Coupled with the device 30 or its drive (for example, mounted on a common carrier) and therefore movable in synchronism with this, a lifting cam 35 is provided in a gap 33 between the conveyor belts 20 and 21, whose cylindrical shaped with rounded front end, for example made of plastic existing part 36 can be raised from a standby position under the upper surface of the conveyor belts 20 and 21 in a projecting position on this.

AT 403 687 B

The device 30 may, for example, the in Fig. 5 have shown basic structure. It has two raisable and lowerable, can be applied from above to the glass strip to be divided 9 hold-down 40 and from below in the region of the scribe line 5, along which the glass strip 9 is to share, abutment abutment 41st Both the hold-down 40 and the abutment 41 are formed as cylindrical plastic strips, which are connected to a generatrix at the top or Abut the bottom of the glass strip 9.

The distance between the hold-down 40 from each other is changeable, so that the forces acting on the glass strip 9 forces can be changed. In the case of thicker glass, the distance of the hold-downs 40 from each other is made larger than with thinner glass.

When breaking glass strips with the aid of the device 30, the abutment 41 is raised above the surface of the conveyor belt 20 so as to achieve a reliable course of the break along the score line 5. Also, the amount of lifting of the abutment 41 above the top of the conveyor belt 20 when a crushing operation is to be performed is selected depending on the glass thickness. It is raised less with thicker glass panes than with thinner glass.

Of course, the lifting finger 35 provided in the slot 33 between the conveyor belts 20 and 21 is effective only when the scribe line 5, along which a glass strip 9 is to be divided, extends to the conveyor belt 21.

As already indicated above, 1 tools 50 and 60 for breaking off the edge strips RX and RY (FIG. 4) are provided on the break table. In this case, the tool 50 for breaking off the edge strip RY along the zero line A corresponding scribe line 6 is determined, whereas the edge breaking tool 60 is used to separate the remaining on the glass strip 9 edge strip RX along the zero line B corresponding scribe line 7.

The edge breaking tool 50 has, for example, the one shown in FIG. 2 principle shown construction. On a support 51, two hold-down strips 52, 53 (cylindrical parts made of elastic plastic) are provided. These hold-down strips 52, 53 can be applied to the glass sheet 3 by moving their support 51 (arrow 54) up and down either side of the scribe line 6. The part 55 of the Randabbrechwerkzeuges 50, on which the carrier 51 is slidably guided, is pivotable by means of a pressure medium motor 56 in the machine frame in the direction of the double arrow 57 about an axis parallel to the scribe line 6. The edge breaking tool 50 further has an abutment 58, also designed as a plastic cylinder, which is mounted on the free end of a lever-shaped support 59. By pivoting the lever 59 by means of a pressure medium motor, not shown, about an axis extending approximately parallel to the X direction, the abutment 59 can be applied from below in the region of the score line 6 to the glass sheet 3.

To cancel an edge strip RY, the abutment 58 and the two downers 52 and 53 are applied from both sides to the glass sheet 3 and then the part 55 of the tool 50 is pivoted by operating the pressure medium motor 56 so that the edge of the glass sheet 3 adjacent , Downholder 53 applied to the edge strip RY moves downwards relative to the other hold-down device 52 and the edge strip RY is twisted. In this case, the break opens along the score line 6 and the edge strip RY is separated over the entire width of the glass sheet 3. The amount of pivoting of the part 55 of the tool 50 can be selected depending on the width of the glass sheet and its thickness and is usually chosen to be larger when the scribe line 6 is longer.

In the area of ​​the tool 50, a rotatable roller or roller 49 mounted on the machine frame is still provided, on which the glass sheet 3 or the edge of the tool adjacent edge thereof is guided and supported, since this edge is over the lateral edge of the conveyor belts 10 and 11 certain parts of the Glasbrechtisches 1 or if in addition to the conveyor belts felt felt parts are provided on these above in the direction of arrow 2 is transported.

After thus the edge strip RY has been separated, the glass sheets 3 are divided along the scribe lines 4 in individual glass strips 9 by the lifting bar 12 is actuated.

The individual glass strips 9 are moved further by moving the conveyor belt 11 until the rear edge of the glass strip relative to the conveying direction 2 is aligned with the edge breaking tool 60. This is by operating the pressure medium motor 70 on a machine frame fixed guide rail 72 on which the frame of the Randabbrechwerkzeuges 60 is performed, adjusted until it is aligned so that the abutment 68 is located just below the score line 7. Now, the abutment 68 is applied by pivoting the lever 69 from below to the glass strip 9 and the tool part 65 pivots after applying the hold-down 62, 63 in the direction of the double arrow 67 by pressing the pressure medium motor 66 to separate the edge strip RX from the glass strip 9 ,

After this has been carried out, the edge breaking tool 60 is moved back into its standby position farther away from the conveyor belt 11 or the edge of the breaker table 1 by corresponding actuation of the pressure medium motor 70 (double arrow 73).

AT 403 687 B

The thus obtained glass strips 9 without edge strips RX are moved by moving the conveyor belt 11 onto the part of the ironing table 1 formed by the conveyor belts 20 and 21, at which time the device 30 moves out of the area of ​​the glass strips 9 to be conveyed by adjusting it on its guide track 31 located.

After the glass strips 9 have been cut into blanks by means of the device 30 by being broken along the scribe lines 5, the blanks thus obtained by moving the conveyor belts 20 (in the conveying direction, arrow 2) and 21 (in the Y direction ) transported away from the breaking table 1 and fed to another use.

In summary, the invention can be represented, for example, as follows:

On a Glasbrechtisch 1 a lifting bar 12 are provided for breaking scribed glass panels along in the Yrichrichtung scribing lines and means 30 for breaking the glass sheets along in the X direction extending scribe lines, wherein conveyor belts 10, 11, 20, 21 are provided to the scribed or to move partially broken glass sheets to the various locations of Glasbrechtisches 1.

In addition, 1 Randabbrechwerkzeuge 50 and 60 are associated with the glass breaking table, cancel, which edge strips of the glass sheet located outside of zero lines corresponding scribe lines by twisting these edge strips against the glass sheet. The procedure is such that the edge strip running in the Y direction is first broken off by the edge breaking tool 50 before the glass sheet is broken along the Y-direction scribing lines and subsequently by the individual glass strips thus obtained, along the zero scribing line which is in the X direction. Direction runs, located more edge strip is broken off by Randabbrechwerkzeug 60. Only then are the glass strips along the running in the X direction scribing lines divided into the desired blanks and transported away from the conveyor belt 21 of Glasbrechtisches 1.