JP5445748B2 - Break bar and break method - Google Patents

Description

  The present invention relates to a break bar and a break method for dividing a brittle material substrate on which a scribe line is formed along the scribe line.

  When a conventional brittle material substrate such as a glass substrate is cut along a scribe line, for example, as shown in a side view in FIG. 1, the break bar 1 whose upper edge 1a requires an angle of about 90 ° is inserted into the scribe line. Is made to impact-contact with the line directly below the scribe line from the back surface of the brittle material substrate on which the is formed. By doing so, the brittle material substrate is cracked and can be divided along the scribe line. (See Patent Document 1)

JP 2002-103295 A

  However, according to such a breaking method, it is only necessary that the break bar 1 can be brought into contact with the substrate so as to press the substrate strictly in the vertical direction. There was a problem that the cross section was likely to be defective due to pressure applied in the direction.

  The present invention has been made paying attention to such a conventional problem, and an object of the present invention is to provide a break bar and a break method in which the end portions do not contact at the time of break and no chipping occurs.

  In order to solve this problem, a break bar according to the present invention includes a break blade having a linear edge portion at the upper end, and first and second affixed at symmetrical positions on both side surfaces of the break blade, respectively. An elastic member is provided, and the height of the first and second elastic members is higher than the edge portion of the break blade.

  In order to solve this problem, the breaking method of the present invention is a breaking method in which a brittle material substrate in which a scribe line is formed on one surface is broken along the scribe line using the break bar described above, Contacting the first and second elastic members with the surface of the brittle material substrate where no scribe line is formed, and positioning the brittle material substrate so that the scribe line is located at the edge line of the break blade; The first and second elastic members are deformed by pressing the break bar against the brittle material substrate, and the break is performed using the edge of the break blade as a fulcrum.

  In order to solve this problem, the breaking method of the present invention includes the above-described break bar, a flat plate, and third and fourth elastic members having a rectangular parallelepiped shape attached to the lower surface of the flat plate at a predetermined interval in parallel. And a break method for breaking a brittle material substrate having a scribe line formed on one surface along the scribe line, wherein the scribe line of the brittle material substrate is not formed. Are brought into contact with the first and second elastic members, the brittle material substrate is positioned so that the scribe line is located at the edge line of the break blade, and the third and fourth elastic members are the brittle material. The pressing member is positioned so as to be positioned above the first and second elastic members through the substrate, and the break bar is pressed against the brittle material substrate. The first, the second and third, to deform the fourth elastic member, is to break the edges of the break edge as a fulcrum.

  Further, since the fulcrum of the division is one line perpendicular to the paper surface including the point indicated by the edge 1a in FIG. 1, the upper end of the break bar 1 when the brittle material substrate is divided into the substrates 2a and 2b. In order to solve the problem that the corners of the brittle material substrate in contact with the edge 1a are easily pressed against each other, chipping occurs at the corner portions and defective products are likely to appear on the brittle material substrate. First and second break blades arranged at a predetermined interval; and a first elastic member attached to a side surface of the first break blade at a position symmetrical to the second break blade; A break bar having a second elastic member attached to a side surface of the second break blade at a position symmetrical to the first break blade; and the first and second break blades. In the middle line of the blade edge The brittle material substrate are positioned so as scribe line is located, the first, may break the edge of the second break edge as a fulcrum.

  According to the present invention having such characteristics, the brittle material substrate is held by the first, second, or first to fourth elastic members when scribing using the break bar. By pressing the break bar, the two edge portions of the break blade come into contact with the surface of the brittle material substrate, respectively, and the first, second, or first to fourth elastic members are deformed in a balanced manner on the left and right, respectively. Each of the edge portions is pivoted to be a fulcrum and is broken along the scribe line. At this time, the left and right elastic members abut before the edge portion abuts on the surface of the substrate and deforms in a balanced manner on the left and right, so that the edge can abut on the surface of the substrate perpendicularly. Furthermore, when the break bar having the first and second break blades arranged at a predetermined interval is used, the divided portions do not press each other, so that no chipping occurs and the product yield is improved. Can be made.

FIG. 1 is a schematic view showing a state in which a brittle material substrate is divided using a conventional break bar. FIG. 2 is a sectional view of the break bar and the pressing member according to the first embodiment of the present invention. FIG. 3 is a perspective view of the break bar and the pressing member according to the first embodiment of the present invention. FIG. 4A is a diagram illustrating a state immediately before a break is generated using the break bar according to the first embodiment. FIG. 4B is a diagram illustrating a state after the break by the break bar according to the first embodiment. FIG. 5 is a perspective view of the break bar and the pressing member according to the second embodiment of the present invention.

  FIG. 2 is a sectional view showing details of the break bar 10 according to the first embodiment of the present invention, and FIG. 3 is a perspective view of the break bar 10. As shown in these drawings, the break bar 10 is composed of a metal rectangular break bar main body 11 at the center and first and second elastic members 12 and 13 provided on the sides thereof. The break bar main body 11 has a groove 14 having a constant width and depth at the center in the longitudinal direction of the upper surface, and first and second break blades 15 and 16 are formed symmetrically on the left and right. The first elastic member 12 is attached to the side surface of the first break blade 15 at a position symmetrical to the second break blade 16, and the second elastic member 13 is attached to the side surface of the second break blade 16. The first break blade 15 is affixed at a symmetrical position. The upper ends of the pair of break blades 15 and 16 are straight edge portions as shown in FIG. 3, and have the same height. The width of the groove 14 may be selected according to the pitch of the scribe lines of the brittle material substrate to be broken. Now, the heights of the left and right elastic members 12 and 13 are set slightly higher than the upper edge portions of the break blades 15 and 16.

  When the break bar is used for breaking, a pressing member 20 is used at the top as shown in FIGS. The pressing member 20 is formed, for example, by attaching third and fourth elastic members 22 and 23 in parallel to the lower surface of a rectangular parallelepiped flat plate 21 having substantially the same size as the break bar 10 in the longitudinal direction. The elastic members 22 and 23 correspond to the elastic members 12 and 13 provided on the left and right sides of the break bar, and the lower surfaces thereof are flat.

  A breaking method using the break bar 10 and the holding member 20 will be described with reference to FIGS. 4A and 4B. First, a scribe line S is formed on a brittle material substrate, for example, a glass plate 30 by a predetermined method. As shown in FIG. 4A, when viewed from above, the glass plate is placed on the elastic members 12 and 13 so that the line directly below the scribe line S overlaps the center line of the central groove 14 of the break bar 10 described above. 30 is arranged. At this time, the edge portions of the break blades 15 and 16 are not in contact with the lower surface of the glass plate 30. And it arrange | positions so that the break bar 10 and the pressing member 20 may overlap when it sees from the upper part from the upper part of the glass plate 30, and the pressing member 20 is fixed.

  Then, as shown in FIG. 4B, the break bar 10 is pushed up from below. Instead of this, the pressing member 20 may be pushed downward. In this way, the elastic members 12, 13 and the upper elastic members 21, 22 are deformed in a balanced manner on the left and right until the edge portions at the tips of the break blades 15, 16 contact the glass plate 30, and the respective edge portions are fulcrums. The arrow-like pressure is applied to the glass plate 30. At this time, the glass plate 30 is cut along the scribe line S by being pushed open to the left and right. Therefore, unlike the case of the conventional break, the pressing force is not applied to the portion immediately below the scribe line S, and the corner portion is not chipped.

  Next, a break bar according to the second embodiment of the present invention will be described. In the second embodiment, as shown in FIG. 5, the break bar 40 is disposed on a rectangular parallelepiped flat plate 41, the left and right break blades 42, 43 are disposed independently, and the elastic members 44, 45 is attached. That is, instead of the groove 14 of the first embodiment, the break bar itself is constituted by two break blades. In this case as well, breakage can be made in the same manner using the holding member 20, and no chipping occurs in the portion directly below the scribe line.

  Here, the elastic members of the first and second embodiments preferably have adhesion, and elastic rubber, urethane foam, or the like can be used.

  The first and second break blades have been described by taking as an example a break bar arranged at a predetermined interval, but the first is located symmetrically on both side surfaces of the break blade having a linear edge portion at the upper end. Even in the break bar to which the second elastic member is attached, the break blade can be brought into contact with the elastic member on both sides of the break blade so as to press the surface of the substrate vertically.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used for a break device that breaks a brittle material substrate in which a scribe line is formed in advance on the brittle material substrate.

10, 40 Break bar 11 Break bar main body 12, 13, 22, 23, 44, 45 Elastic member 14 Groove 15, 16, 42, 43 Break blade 20 Holding member 21, 41 Flat plate

Claims (3)

First and second break blades having a linear edge portion at the upper end and arranged at a predetermined interval;
A first elastic member affixed to a side surface of the first break blade at a position symmetrical to the second break blade;
A second elastic member attached to a side surface of the second break blade at a position symmetrical to the first break blade;
The break bar which made the height of the said 1st, 2nd elastic member higher than the edge part of the said break blade. A break method using the break bar according to claim 1 , wherein a brittle material substrate having a scribe line formed on one surface is broken along the scribe line,
The surface of the brittle material substrate on which the scribe line is not formed is brought into contact with the first and second elastic members so that the scribe line is positioned at an intermediate line between the edges of the first and second break blades. Positioning the brittle material substrate;
A break method in which the first and second elastic members are deformed by pressing the break bar against the brittle material substrate, and the break is performed with the edges of the first and second break blades as fulcrums. A break bar according to claim 1 ;
A brittle material in which a scribe line is formed on one surface using a pressing member having a flat plate and a rectangular parallelepiped third and fourth elastic member attached in parallel to the lower surface of the flat plate at a predetermined interval A break method for breaking a substrate along the scribe line,
The surface of the brittle material substrate on which the scribe line is not formed is brought into contact with the first and second elastic members so that the scribe line is positioned at an intermediate line between the edges of the first and second break blades. Positioning the brittle material substrate;
Positioning the pressing member so that the third and fourth elastic members are located on the upper portions of the first and second elastic members, respectively, via the brittle material substrate;
Breaking method in which the first, second, third, and fourth elastic members are deformed by pressing the break bar against a brittle material substrate, and the break is performed with the respective edges of the first and second break blades as fulcrums. .

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