JP2001002438A - Glass scriber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute adequate brake by scribing of a closed curve by sucking a glass sheet set on a table formed with a recessed part in a central part to curve the glass sheet to a recessed surface shape and using a cutter wheel formed with grooves inclined at a prescribed angle of inclination with the axial central direction of the wheel at a prescribed pitch at the blade edge ridge line of the disk-shaped wheel. SOLUTION: A scribing head 8a is previously retreated and the table 2 is moved in such a manner that the center Q of rotation of the table 2 is aligned to the central line of a guide bar 7. Next, the glass sheet 1 is set at a table and is fixed by vacuum attraction and the pressure in the recessed part of the table 2 is reduced to downwardly deflect the glass sheet 1. Another scribing head 8b is moved to a position deviating by r1 from the center Q of rotation. The side of the larger cutting-off quantity of the grooves of the glass cutter 25b is set on the outer side of a scribing circle and the blade edge is brought into abutment on the glass sheet 1. The circular scribing of the radius r1 is executed when the blade edge load is applied to the glass sheet 1 and the table 2 is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass scriber suitable for cutting out a region surrounded by a closed curve on a glass plate.

[0002]

2. Description of the Related Art To cut a glass plate, a glass cutter wheel is used to scribe the surface of the glass plate in one direction to generate cracks (referred to as vertical cracks) extending downward from the surface of the glass plate. The glass plate is cut (breaked) by applying stress to the glass plate and growing the vertical cracks to the lower surface of the glass. Here, as shown in the upper diagram (A) of FIG. 1, when the region 1a of the closed curve is cut out from the glass plate 1, as shown in the side view shown in the middle diagram (B), the direction of the vertical crack V at the time of scribing Is always inclined diagonally toward the outside of the closed curve,
As shown in (C), the break operation of cutting out the region 1a to be cut out from the glass plate 1 is facilitated.

[0003] For this purpose, a glass cutter wheel capable of forming an inclined vertical crack has been introduced in, for example, Japanese Patent Application Laid-Open No. 9-278474, which will be described here with reference thereto.

FIG. 2 is a front view of the glass cutter wheel.
It is the figure seen from (scribe direction). In the glass cutter wheel 12 provided rotatably with respect to the wheel cutter 11, the left edge angle with respect to the ridge line 13 of the edge is 73 ° and the right edge angle is 83 °.
If the glass plate 1 is scribed using the glass cutter wheel 12, a vertical crack V inclined downward and leftward in the drawing and cracks 14 and 15 generated on the surface of the glass plate (referred to as horizontal cracks). Is described as occurring.

[0005] In the break of the glass plate 1 on which the closed curve is scribed by using such a glass cutter wheel 12, the glass plate is bent in the direction in which the vertical crack grows as in the above-mentioned linear break. Therefore, it is necessary to form a deep vertical crack at the time of scribing.

[0006]

However, in the scribing apparatus using the conventional wheel cutter 11 as shown in FIG. 2, the vertical crack V formed is shallow and its inclination angle is small, so that the conventional cracking by punching is performed. In this case, the end face of the break of the product 1a becomes jagged, or the product 1a itself breaks into pieces, making it difficult to perform an appropriate break.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a glass scriber that can form a deep vertical crack that is inclined when a closed curve is scribed.

[0008]

FIG. 3 shows a "glass cutter wheel" of Japanese Patent Application Laid-Open No. Hei 9-188534 previously filed by the present applicant. The glass cutter wheel 21 has an enlarged view A on a ridge line 22 of a normal cutter wheel (that is, both edge angles θ1 and θ2 are equal).
1. As shown in B1, a U-shaped groove 23 'having a depth h at a predetermined interval p (the shape of the groove itself is not limited to this).
By cutting off, a fine projection 24 was formed on the edge line of the cutting edge, a deep vertical crack could be obtained, and the scribe performance was dramatically improved.

As can be seen from the enlarged view B1, the groove 23 '
Are symmetrical on both sides, and the cutout amount of the groove 23 ′ is uniform on both sides of the ridge 22. Enlarged view B
FIG. 4 shows a cross section taken along line L1 shown in FIG. The groove widths W1, W2 from the ridge line 22 to both sides are equal to each other,
The groove depth at both ends of the groove is the same. That is, the groove 23 '
Of the glass cutter wheel 21 is parallel to the axial direction of the glass cutter wheel 21.

On the other hand, as shown in the glass cutter wheel 25 of FIG. 5, when the cut amount of the groove 23 is made uneven on both sides of the ridge line and the cut surface 23a of the groove is inclined, the cut amount becomes larger. It was found that a deep vertical crack inclined at the angle U was formed.

The reason why the vertical crack is tilted is considered to be that the edge of the cutting edge when scribing slightly shifts in the groove, which results in an imbalance in the stress applied to the glass plate.

In FIG. 5, the glass plate 1 is a flat table T
Is fixed by suction, but the glass plate 1
It has also been found that if the is bent in a concave shape (or if the is bent by the scribe pressure), the inclination angle U of the vertical crack V is further increased. Applying the glass cutter wheel and the scribing method in which the glass plate is bent with such a configuration can obtain a more inclined deep vertical crack, and is most suitable for cutting out a closed curve region.

[0013]

FIG. 6 shows a glass scriber 50 according to an embodiment of the present invention which employs a scribing method in which such a glass cutter wheel and a glass plate are bent. The table 2 on which the glass plate 1 is set rotates on the semi-fixed table 4 using the motor 3 as a drive source. Q indicates the rotation center of the table 2. The semi-fixed table 4 itself can be moved along two rows of rails 5 and 6 in a direction (Y direction) perpendicular to the paper surface.

A guide bar 7 extends in the X direction above the table 2, and two scribe heads 8a and 8b are provided along the guide bar 7, and each of the scribe heads 9a and 9b is a scribe head 8a. , 8b. A chip holder 10 is provided below the scribe heads 8a and 8b so as to be vertically movable and swingable.
The glass cutter wheels 25 (25a, 25b) described above are rotatably mounted on the lower ends of the chip holders 10.

FIG. 7 is a view of the glass scriber 50 as viewed from above, and shows the respective glass cutter wheels 25a and 25a.
b is located directly below the center line O of the guide bar 7.

FIG. 8 shows details of the glass cutter wheel 25, and portions corresponding to those in FIG. 3 are denoted by the same reference numerals. In the present glass cutter wheel 25, as shown in enlarged views A2 and B2 in FIG. 8, the cut surface 23a of the groove 23 is inclined, and the cut amount is uneven on both sides of the ridge line 22. Note that the enlarged view A2 is a view as viewed from the arrow Z direction.

FIG. 9 shows a cross section taken along line L2 shown in the enlarged view B2 of FIG.
Are not equal to each other, and therefore the groove depths h1 and h2 at both ends of the groove are not equal to each other. Here, the dimensions of the present glass cutter wheel 25 are shown in Table 1 as production examples.

[0018]

[Table 1]

FIG. 10 is a detailed sectional view of the table 2, and FIG. 11 is a view of the table 2 as viewed from above. The table 2 itself is formed of a cylindrical member, and a concave portion 2b having a predetermined depth is formed on the upper surface so as to leave a peripheral edge 2a having a predetermined thickness. The upper surface of the peripheral edge 2a serves as a substantial mounting table for the glass plate 1, and an annular suction groove 2c is formed on the upper surface thereof so that the glass plate 1 can be suction-locked. In order to bend the glass plate 1 set on the table 2 downward, a suction port 2d for reducing the pressure of the recess 2b is formed.

Next, the glass scriber 50
The operation of making a circular scribe with a radius r1 on the glass plate 1 will be described. As shown in FIG. 6, one scribe head 8a is retracted to the left in the figure, and the rotation center Q of the table 2 coincides with the center line O of the guide bar 7 as shown in FIG. Move the table 2 as follows. Next, the glass plate 1 is set on the table 2 and fixed by vacuum suction to the table 2, and the concave portion 2b of the table 2 is depressurized to bend the glass plate 1 downward.

In this state, the other scribe head 8b is moved rightward from the center of rotation Q by r1. At this time, the glass cutter wheel 25b is set in the direction shown in the partially enlarged view in FIG. 6 (the one with the larger cutout amount of the groove is outside the scribe circle). Then, the chip holder 10 is lowered, the blade edge of the glass cutter wheel 25b is brought into contact with the glass plate 1, and a predetermined blade load is further applied. In this state, the table 2 is rotated in the arrow direction as shown in FIG. A circular scribe with a radius r1 is performed on 1.

The vertical crack formed on the glass plate 1 by the circular scribe is inclined to the outside of the scribe circle as shown by V in FIG. 18 which will be described later.

An example of the processing data of the glass cutter wheel 25 at this time is shown in Table 2 as processing data 1 in Table 2. Processing data 1 is obtained by bending the glass into a concave shape under reduced pressure as shown in FIG. 10 with a glass thickness of 0.7 mm.

[0024]

[Table 2]

Table 3 shows the scribing results for each of the above processing data 1. Table 4 shows the results of scribing the glass plate 1 on a flat table T as shown in FIG. 5 as a comparative example.

[0026]

[Table 3]

[0027]

[Table 4]

As can be seen from a comparison between Tables 3 and 4, when the glass thickness is 0.7 mm, the scribe obtained by bending the glass into a concave shape by decompression as shown in FIG. 10 is flatter on the table as shown in FIG. The inclination of the vertical crack was larger than when the scribe was performed, and a deeper result was obtained.

As shown in FIG. 12, processing data 2 is shown in Table 5 as an example of data when the convex portion 2b of the table 2 is not depressurized but at atmospheric pressure as shown in FIG.

[0030]

[Table 5]

Next, an operation for scribing concentric circles having a radius r1 and a radius r2 on the glass plate 1 will be described as an application for producing a disk or the like. As shown in FIG. 13, the scribe head 8b is set at the same position as in FIG. 6, and the other scribe head 8a is moved to a position separated from the rotation center Q of the table 2 by r2 to the left. At this time, the glass cutter wheel 25a is set in the direction shown in the partially enlarged view in FIG. Then, both the tip holders 10 are lowered, and the both edges of the glass cutter wheels 25a and 25b are brought into contact with the glass plate 1 and a predetermined edge load is applied. In this state, the table 2 is rotated in the direction of the arrow as shown in FIG. Then, concentric scribes with radii r1 and r2 can be performed.

The vertical cracks formed on the glass plate 1 at this time are shown in FIG. 24 to be described later, and both the outer vertical cracks V1 and the inner vertical cracks V2 are inclined outward. In FIG. 13, a vertical crack when the direction of the glass cutter wheel 25a is rotated by 180 ° and scribed is shown in FIG. 26 to be described later, and the inner vertical crack V2 is inclined inward.

FIG. 15 shows scribing performed in a state where the inside of the concave portion 2b of the table 2 is pressurized and bent upward of the glass plate 1. In this case, the glass cutter wheel 25b
10 was set in a direction opposite to that of FIG. 10, a deep vertical crack V inclined toward the inside of the scribe circle in the figure was obtained.

When the glass plate 1 is bent downward as shown in FIG. 10, the table 2A in FIG. 16 has a bent surface 2f on the peripheral edge 2a in order to increase the adhesion between the glass plate 1 and the table 2A. It is provided with a slope that follows.

When the glass plate 1 is bent upward as shown in FIG. 15, the table 2B of FIG. 17 follows the bending of the suction surface 2f in order to increase the adhesion between the glass plate 1 and the table 2B. Such an inclination is provided.

In each of the above-described embodiments (each form), the scribe head is fixed and the glass plate is moved at the time of scribing. However, if the glass plate is fixed and the scribe head is movably provided, a desired shape can be obtained. The closed curve area can be scribed.

Although the shape of the groove formed in the glass cutter wheel when viewed from the side is an arc shape, the same operational effects can be obtained even if the shape is a U shape, a V shape, a saw blade shape or a concave shape. Is obtained.

A breaker suitable for cutting out the area scribed as described above will be introduced. FIGS. 18 and 19 showing the first embodiment show a breaking device for the glass plate 1 obtained by the scribe in FIG. 7, and since a deep and inclined vertical crack V is obtained, a simple header (pressing jig) is used. ) 51 can be broken by pressing.

Tables 5 and 6 show the data of the pressing load W when the plate thickness is 0.7 mm and 1.1 mm using the header 51 made of acrylic (same for nylon) resin.

[Table 6]

[Table 7]

At this time, the table 2 shown in FIG. 10 can be used as it is. In this case, the scribe step and the break step can be performed on one table, so that the work efficiency is improved and the work space is improved. Can be smaller.

FIGS. 20 and 21 show a second embodiment.
After the scribing, the depressurization of the concave portion 2b in the table 2 is further strengthened and the bending is further increased to cause a break. Deflection pressure when thickness is 0.7mm and 1.1mm
The data of (reduced pressure) are shown in Tables 7 and 8, respectively. The pressure for fixing the glass plate to the table was -80 KPa (gauge pressure).

[0042]

[Table 8]

[Table 9]

FIGS. 22 and 23 show a third embodiment.
The glass plate 1 is scribed in a closed curve so that the vertical crack V is inclined inward, and the closed curve area is broken by lifting the suction cup 52 from above. If the suction cup 52 is mounted on a transfer robot arm, the broken disk 1p can be transferred to a subsequent process as it is.

FIGS. 24 and 25 show a fourth embodiment.
FIG. 14 shows a breaking device for a glass plate 1 (both vertical cracks V are inclined outwardly) scribed concentrically. The header 53 is provided with an inner header 55 urged by a spring 54, and the table 2C is further formed with a concave portion 2b 'at the center in the concave portion 2b.

As shown in FIG. 24, when the header 53 is depressed, the disk 1p is first divided at the outer vertical crack V1 and falls into the recess 2b. The header 53
Is further depressed, the header 53 is locked by the divided disk 1p as shown in FIG. 25. Thereafter, the header 53 overcomes the urging force of the spring 54 and
5, only the center portion 1q is broken at the position of the inner vertical crack V2, and a disk-shaped disk 1p having the center portion hollowed out is obtained.

FIGS. 26 and 27 show a fifth embodiment.
The breaking device for the glass plate 1 in which the inner vertical crack V2 is inclined inward is shown. In this device,
The table 2D is provided with a support 2g at the center of the recess 2b to support a region surrounded by the inner vertical crack V2, and a predetermined recess 56a is formed on the lower surface of the header 56.

According to this configuration, a break in the outer vertical crack V1 and a break in the inner vertical crack V2 can be simultaneously performed by one pressing operation of the header 56. still,
When the table 2D is also used for scribing, the support table 2D is bent so that the glass plate 1 bends during scribing.
g is set lower than the glass mounting surface by a predetermined amount.

FIGS. 28 and 29 show a sixth embodiment.
FIG. 3 shows a breaking device for a glass sheet 1 in which an outer vertical crack V1 is inclined outward and an inner vertical crack V2 is inclined outward. In this device, the header 57 has a convex portion 57a at the center of the lower surface, and a suction hole 57b is provided on the lower surface other than the convex portion.

As shown in FIG. 29, the header 57 is lowered and the convex portion 57a is pressed at the central portion of the glass plate 1 to break at the position of the inner vertical crack V2. By moving the header 57 upward while the glass plate 1 is sucked by the header 57, the glass plate 1 is broken at the outer vertical crack V1 and a disk-shaped glass plate is obtained.

[0050]

As described above, the glass scriber of the present invention is a glass cutter wheel in which grooves are formed at a predetermined pitch on a ridgeline of a cutting edge of a disk-shaped wheel at a predetermined angle with respect to the axial direction of the wheel. Is used, and because the glass plate is scribed in a bent state, a deep vertical crack can be obtained, and the vertical crack is more greatly inclined, which is most suitable for scribing for cutting out a closed curve area. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a state of cutting a closed curve area;

FIG. 2 is a diagram showing a cutting method disclosed in the official gazette;

FIG. 3 is a diagram of a glass cutter wheel disclosed in the official gazette;

FIG. 4 is a partially enlarged cross-sectional view of a ridgeline of a cutting edge in FIG. 3;

FIG. 5 is a diagram showing an example of use of a glass cutter wheel.

FIG. 6 is a front view of a glass scriber showing one embodiment of the present invention.

FIG. 7 is a view of the glass scriber of FIG. 6 viewed from above.

8 is a detailed view of a glass cutter wheel employed in the glass scriber of FIG.

9 is a partially enlarged sectional view of the glass cutter wheel of FIG.

FIG. 10 is a diagram showing an example of scribe in the glass scriber of FIG. 6;

11 is a view of the table of FIG. 10 as viewed from above.

FIG. 12 is a diagram showing an example of scribe in the glass scriber of FIG. 6;

FIG. 13 is a view showing another example of scribe with the glass scriber of FIG. 6;

14 is a view of the table of FIG. 13 as viewed from above.

FIG. 15 is a view showing another scribe example in the glass scriber of FIG. 6;

FIG. 16 is a sectional view of a table suitable for scribing in FIG. 10;

17 is a sectional view of a table suitable for scribing in FIG.

FIG. 18 is a diagram showing an example of a diagram break method.

FIG. 19 is a diagram showing a state at the time of a break in FIG. 18;

FIG. 20 is a diagram showing an example of a diagram break method.

FIG. 21 is a diagram showing a state at the time of a break in FIG. 20;

FIG. 22 is a diagram showing an example of a diagram break method.

FIG. 23 is a diagram showing a state at the time of a break in FIG. 22;

FIG. 24 is a diagram showing an example of the diagram break method.

FIG. 25 is a diagram showing a state at the time of a break in FIG. 24;

FIG. 26 is a diagram showing an example of a diagram break method.

FIG. 27 is a diagram showing a state at the time of a break in FIG. 26;

FIG. 28 is a diagram showing an example of a break method.

FIG. 29 is a diagram showing a state at the time of a break in FIG. 28;

[Explanation of symbols]

 Reference Signs List 1 glass plate 2 table 2a peripheral edge 2b recess 7 guide bar 8 scribe head 10 chip holder 23 groove 23a groove cutting surface 25 glass cutter wheel 51 header 52 sucker 53 header 54 spring 55 inner header 56 header V vertical crack U inclination angle 57 header

Claims (7)

[Claims] 1. A glass scriber that cuts a scribe line of a closed curve, a table having a concave portion formed in a central portion of a columnar member, means for sucking and fixing a glass plate set on the table, and depressurizing the concave portion. A decompression means for curving the glass plate into a concave shape, a glass cutter wheel having grooves formed at a predetermined pitch on a ridgeline of the cutting edge of the disc-shaped wheel at a predetermined angle with respect to the axial direction of the wheel, and the glass cutter wheel. A glass scriber comprising: a scribe head that rotatably holds the scribe head; and a scribe unit that moves the scribe head relative to the glass plate to scribe a closed curve. 2. The glass scriber according to claim 1, wherein said glass cutter wheel is mounted on said scribe head such that when a closed curve is scribed by said glass cutter wheel, vertical cracks are inclined to the outside of the closed curve. 3. A glass scriber engraving a scribe line of a closed curve, a table having a concave portion formed in the center of a columnar member, means for suction-fixing a glass plate set on the table, and a cutting edge of a disk-shaped wheel. A glass cutter wheel in which grooves inclined at a predetermined angle with respect to the axial direction of the wheel are formed at a predetermined pitch, a scribe head that rotatably holds the glass cutter wheel,
A glass scriber comprising: a scribe means for moving the scribe head relative to the glass plate to scribe a closed curve. 4. The glass scriber according to claim 3, wherein said glass cutter wheel is mounted on said scribe head such that when a closed curve is scribed by said glass cutter wheel, a vertical crack is inclined to the outside of the closed curve. 5. A glass scriber for forming a scribe line of a closed curve, a table having a concave portion formed in the center of a columnar member, means for fixing a glass plate set on the table, and pressing the concave portion to form a glass. A pressure means for bending a plate into a convex shape, a glass cutter wheel having grooves formed at a predetermined pitch on a ridgeline of a cutting edge of a disc-shaped wheel at a predetermined angle with respect to the axial direction of the wheel, and the glass cutter wheel. A glass scriber comprising: a scribe head that rotatably holds the scribe head; and a scribe unit that moves the scribe head relative to the glass plate to scribe a closed curve. 6. The glass scriber according to claim 5, wherein the glass cutter wheel is mounted on the scribe head such that when a closed curve is scribed by the glass cutter wheel, a vertical crack is inclined inside the closed curve. 7. A scribing method for scribing a closed curve using a glass cutter wheel having grooves formed at a predetermined pitch on a cutting edge line of a disc-shaped wheel at a predetermined angle with respect to the axial direction of the wheel. The glass cutter wheel is mounted on the scribe head so that the vertical crack caused by the scribe always faces outside the closed curve, and the scribe head is moved relative to the glass plate while the glass plate is curved in a concave shape. Scribing method characterized by scribing.