KR20130129140A - Method for endurance test of fragile plate and device for endurance test of fragile plate - Google Patents

Abstract

According to the present invention, by forming a first curved portion in which a tensile stress occurs on the surface of the brittle plate, and changing the position of the first curved portion, the tensile stress along the circumferential direction around the entire circumference of the surface of the brittle plate Is added to the brittle plate, forming a second curved portion in which tensile stress is generated on the rear surface of the brittle plate, and by changing the position of the second curved portion, the tension along the circumferential direction around the entire circumference of the rear surface of the brittle plate; It relates to a method for testing the durability of a brittle plate subjected to stress.

Description

Durability test method of brittle plate and durability test device of brittle plate {METHOD FOR ENDURANCE TEST OF FRAGILE PLATE AND DEVICE FOR ENDURANCE TEST OF FRAGILE PLATE}

This invention relates to the durability test method of a brittle plate, and the durability test apparatus of a brittle plate.

As a durability test method of a glass plate, the method of curving a glass plate is proposed (for example, refer patent document 1). In this method, the glass plate is bent and deformed, thereby giving the glass plate a stress equal to or higher than the stress applied to the glass plate in a subsequent step. If a defect is contained in a glass plate, a crack may form in a glass plate and the defective article may be screened.

Japanese Patent Laid-Open No. 2011-202991

The crack formed in brittle plates, such as a glass plate, is formed mainly from the defect of the outer peripheral part of a brittle plate. Examples of the defects include impurities and scratches. If the crack extends from the end of the brittle plate to the end, the brittle plate breaks.

In the method of the said patent document 1, only the center part of each edge | side of the rectangular brittle plate could be curved-deformed in principle, and the both ends of each side | side cannot be inspected, and the discrimination accuracy of the good and defective goods was bad.

This invention is made | formed in view of the said subject, and an object of this invention is to provide the durability test method of a brittle plate and the durability test apparatus of a brittle plate which can discriminate | determine a good quality and defective goods with high precision.

In order to solve the said subject, the durability test method of the brittle plate of one embodiment of the present invention,

In the brittle plate, by forming a first curved portion that generates a tensile stress on the surface of the brittle plate, by changing the position of the first curved portion, a tensile stress along the circumferential direction is applied to the entire circumference of the surface of the brittle plate,

In the brittle plate, a second curved portion in which tensile stress is generated is formed on the rear surface of the brittle plate, and the tensile stress along the circumferential direction is applied to the entire circumference of the outer circumference of the rear surface of the brittle plate by changing the position of the second curved portion. do.

In the durability test method of the said brittle plate, when changing the position of a said 1st curved part and the position of a said 2nd curved part at the same time, it is preferable to follow one position to the other position.

In the durability test method for the brittle plate, the first curved portion and the second curved portion extend in a first direction from an end portion to an end portion of the brittle plate, respectively, and move in a direction perpendicular to the first direction, and thereafter. , It extends from the end to the end of the brittle plate in a second direction different from the first direction, it is preferably moved in a direction perpendicular to the second direction.

In the durability test method of the brittle plate, the first curved portion and the second curved portion are respectively extended from the end portion to the end portion of the brittle plate through the central portion of the brittle plate, rotated about the central portion of the brittle plate It is preferable.

In the durability test method of the said brittle plate, it is preferable that the said brittle plate contains a glass plate.

Moreover, the durability test apparatus of the brittle plate by another embodiment of this invention,

And bending deformation means for bending deformation of a part of the brittle plate,

The bending deformation means,

In the brittle plate, by forming a first curved portion that generates a tensile stress on the surface of the brittle plate, by changing the position of the first curved portion, a tensile stress along the circumferential direction is applied to the entire circumference of the surface of the brittle plate,

In the brittle plate, a second curved portion in which tensile stress is generated is formed on the rear surface of the brittle plate, and the tensile stress along the circumferential direction is applied to the entire circumference of the outer circumference of the rear surface of the brittle plate by changing the position of the second curved portion. do.

In the durability test apparatus for the brittle plate, it is preferable that the bending deformation means follow one position to the other when simultaneously changing the position of the first curved portion and the position of the second curved portion.

In the durability test apparatus for the brittle plate, the first curved portion and the second curved portion extend in a first direction from an end portion to an end portion of the brittle plate, respectively, and are moved in a direction perpendicular to the first direction. , It extends from the end to the end of the brittle plate in a second direction different from the first direction, it is preferably moved in a direction perpendicular to the second direction.

In the durability test apparatus of the brittle plate, wherein the first curved portion and the second curved portion are each extended from the end portion to the end portion of the brittle plate through the central portion of the brittle plate, and rotated about the central portion of the brittle plate desirable.

In the durability test apparatus for the brittle plate, the bending deformation means has a flexible plate for adsorbing the brittle plate, and the flexible plate has a rubber adsorption unit for adsorbing the brittle plate, and the adsorption unit is fixed. It is preferable to include a main board.

In the durability test apparatus for the brittle plate, the bending deformation means has a plurality of sets of a movable body fixed to the main body plate, a telescopic actuator and an end portion of the movable body and an end portion of the telescopic actuator. The telescopic actuator of the set is preferably supported by a support frame.

According to the present invention, there is provided a durability test method for a brittle plate and a durability test device for a brittle plate, which can discriminate between good and defective products with high accuracy.

1 is a side view of the durability test apparatus according to the first embodiment of the present invention.
It is a top view of the glass plate tested by the endurance test apparatus by 1st embodiment of this invention.
3 (a) to 3 (e) are side views of the durability test method according to the first embodiment of the present invention.
4A and 4B are top views (1) of the durability test method according to the first embodiment of the present invention.
5 (a) and 5 (b) are top views (2) of the durability test method according to the first embodiment of the present invention.
6 (a) and 6 (b) are diagrams showing a modification of FIG. 4.
It is a side view which shows a part of endurance test apparatus by 2nd embodiment of this invention.
8 is a plan view illustrating an arrangement example of a plurality of movable bodies.
9 (a) to 9 (e) are side views of the durability test method according to the second embodiment of the present invention.
10 (a) to 10 (c) are perspective views (1) of the durability test method according to the third embodiment of the present invention.
11 (d) and 11 (e) are perspective views (2) of the durability test method according to the third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. In each figure, the same or corresponding code | symbol is attached | subjected to the same or corresponding structure, and description is abbreviate | omitted. Although the brittle plate of the following embodiment is a glass plate, the composite plate formed by forming a resin layer into a ceramic plate or a glass plate or a ceramic plate may be sufficient.

[First Embodiment]

1 is a side view of the durability test apparatus according to the first embodiment of the present invention. It is a top view of the glass plate tested by the endurance test apparatus by 1st embodiment of this invention.

The glass plate 10 may be a part of the glass substrate for flat panel displays (FPD), such as a liquid crystal display (LCD) and an organic electroluminescent display, or a reinforcement board couple | bonded with the said glass substrate so that exfoliation is possible. A reinforcement board is comprised, for example with a glass plate and the resin layer formed on a glass plate, and a resin layer and a glass substrate couple | bond so that peeling is possible. By reinforcing a glass substrate, a reinforcement board enables thinning of a glass substrate, and also thinning and weight reduction of FPD. The reinforcing plate is peeled off the glass substrate during the manufacturing process of the FPD and does not become part of the FPD. After peeling of a reinforcement board and a glass substrate, a reinforcement board is regenerated by exchange of a resin layer. After removal of the old resin layer, the endurance test of a glass plate is performed before formation of a new resin layer, and the good goods without a defect and the defective defective goods are discriminated. A new resin layer is formed into a good article. On the other hand, defective products may be discarded or reused as glass raw materials. Thus, since the glass plate of a reinforcement board is used repeatedly, a flaw may arise in the middle and it is preferable that it is tested for durability.

In addition, when the resin layer of a reinforcement board does not deteriorate, exchange of a resin layer is unnecessary, and a reinforcement board may be tested by the durability test apparatus of this embodiment.

The glass plate 10 can be bent and deformed by an external force, and is returned flat in a natural state without the external force. As shown in Fig. 2, the glass plate 10 is substantially rectangular in plan view and has two long edge portions 10a parallel to each other on its outer periphery, two short edge portions 10b parallel to each other and four chamfered portions. Has (10c). The chamfer 10c may be either C chamfer or R chamfer shown in FIG. 2.

The length L of the glass plate 10 is 400-3200 mm, for example. The width W of the glass plate 10 is 300-2900 mm, for example. The thickness of the glass plate 10 is 0.05-2 mm, for example.

The endurance test apparatus 100 includes bending deformation means 110 for bending deformation of a part of the glass plate 10. The bending deformation means 110 is, for example, as shown in FIG. 1, two gap forming members 111 and 112 and two gap forming members 111 and 112 forming a gap through which the glass plate 10 passes. The spacer 113 (refer FIG. 4) etc. which couple | connects the The thickness of the spacer 113 is slightly larger than the thickness of the glass plate 10. When the glass plate 10 passes between the two gap forming members 111 and 112, the glass plate 10 deforms along the surfaces of the two gap forming members 111 and 112 that face each other. The opposing surfaces of the two gap forming members 111 and 112 may be made of resin so as not to scratch the glass plate 10.

The two gap forming members 111 and 112 include first curved portions 111a and 112a and second curved portions 111b and 112b on surfaces facing each other. The first curved portions 111a and 112a and the second curved portions 111b and 112b may be formed continuously as shown in FIG. 1. The space for bending deformation of the glass plate 10 becomes small.

The first curved portions 111a and 112a bend and deform the glass plate 10 passing therebetween to form the first curved portion 13 in the glass plate 10. Tensile stress is generated on the surface of the first curved portion 13, and compressive stress is generated on the back surface of the first curved portion 13. With the movement of the glass plate 10, the position of the 1st curved part 13 moves.

The first curved portions 111a and 112a may be circular arc surfaces. Since the surface of the 1st curved part 13 turns into an arc surface, and the curvature radius of an arc surface is constant, tensile stress arises stably. The radius of the first curved portion 111a in contact with the surface of the first curved portion 13 is greater than the radius of the first curved portion 112a in contact with the rear surface of the first curved portion 13, and the radius difference thereof is a glass plate ( Slightly larger than the thickness of 10).

The second curved portions 111b and 112b bend and deform the glass plate 10 passing therebetween to form a second curved portion 14 in the glass plate 10. The compressive stress is generated on the surface of the second curved portion 14, and the tensile stress is generated on the rear surface of the second curved portion 14. With the movement of the glass plate 10, the position of the 2nd curved part 14 moves.

The second curved portions 111b and 112b may be circular arc surfaces. Since the back surface of the 2nd curved part 14 turns into circular arc surface, and the curvature radius of circular arc surface is constant, tensile stress generate | occur | produces stably. The radius of the second curved portion 112b in contact with the rear surface of the second curved portion 14 is larger than the radius of the second curved portion 111b in contact with the surface of the second curved portion 14, and the radius difference is the glass plate ( Slightly larger than the thickness of 10).

The 1st curved-surface part 111a, 112a and the 2nd curved-surface part 111b, 112b generate | occur | produce in the glass plate 10 the tensile stress equivalent to or more than the tensile stress which arises in the process after the glass plate 10 test | inspection, respectively. As a process after the inspection of the glass plate 10, the heat processing process in the grinding | polishing process of the glass plate 10, and the manufacturing process of FPD is mentioned, for example.

The durability test apparatus 100 may further have the crack detector 130 which detects the crack formed in the glass plate 10 by bending deformation of the glass plate 10 with the bending deformation means 110. FIG. A crack is formed mainly from the defect of the outer peripheral part of the glass plate 10. Examples of the defects include impurities and scratches. When the crack extends from the end to the end of the glass plate 10, the glass plate 10 splits.

The crack detector 130 is comprised, for example with the sound sensor which detects the sound accompanying formation (creation, tremor) of a crack. The sound sensor is, for example, a sound collecting microphone, and is provided in the vicinity of the glass plate 10.

In addition, the crack detector may be comprised by the camera which image | photographs the glass plate 10, and the image processing apparatus which image-processes the image data image | photographed with the camera, and may detect a crack by image processing. In this case, the crack detector may be provided separately from the endurance test apparatus 100, and may image the flat glass plate after bending deformation by the bending deformation means 110 with a camera.

Next, the durability test method using the durability test apparatus of the said structure is demonstrated based on FIG. 3 is a side view of the durability test method according to the first embodiment of the present invention. 4 is a top view (1) of the durability test method according to the first embodiment of the present invention. FIG. 4A is an overall view, and FIG. 4B is an enlarged view of a portion of FIG. 4A, showing tensile stress applied to the surface of the glass plate. 5 is a top view (2) of the durability test method according to the first embodiment of the present invention. FIG. 5A is an overall view, and FIG. 5B is an enlarged view of a portion of FIG. 5A, showing tensile stress applied to the surface of the glass plate.

First, as shown in FIG. 3A, the glass plate 10 is inserted between the first curved portions 111a and 112a by a suitable driving device or manually, and the first curved portion 13 is attached to the glass plate 10. Is formed. At this time, as shown to Fig.4 (a), the 1st curved part 13 extends in the 1st direction from the edge part of the glass plate 10 to an edge part. The first direction is the width direction of the glass plate 10 in the natural state.

Tensile stress is generated on the surface of the first curved portion 13. Since the glass plate 10 is cut | disconnected in the outer periphery of the surface of the 1st curved part 13, as shown in FIG.4 (b), in the outer periphery of the surface of the 1st curved part 13, the stress in a main orthogonal direction does not generate | occur | produce. , Stress occurs along the circumferential direction. Tensile stress is generated in the curved portion of the outer circumference of the surface of the first curved portion 13.

Subsequently, as shown in FIG.3 (b), when the glass plate 10 is further inserted, the position of the 1st curved part 13 will move to the direction perpendicular to a 1st direction, and to the glass plate 10 The second curved portion 14 is formed. This second curved portion 14 extends from the end to the end of the glass plate 10 in the first direction.

Tensile stress is generated on the rear surface of the second curved portion 14. Since the glass plate 10 is cut | disconnected in the outer periphery of the back surface of the 2nd curved part 14, the stress of a main orthogonal direction does not generate | occur | produce on the outer periphery of the back surface of the 2nd curved part 14, and the stress along a circumferential direction arises. Tensile stress is generated in the curved part of the outer periphery of the rear surface of the second curved part 14.

The surface of the 1st curved part 13 and the back surface of the 2nd curved part 14 are circular arc surfaces, respectively, and may have the same radius. The tensile stress generated on the surface of the first curved portion 13 and the tensile stress generated on the back surface of the second curved portion 14 become equal.

The curvature radius of the surface of the 1st curved part 13 and the curvature radius of the back surface of the 2nd curved part 14 are 10-1500 mm, respectively. In addition, the tensile stress which arises in the surface of the 1st curved part 13 and the tensile stress which arises in the back surface of the 2nd curved part 14 are 50-200 Mpa, respectively. The tensile stress is determined by the radius of curvature, the thickness of the glass plate 10, the Young's modulus of the glass plate 10, and the like.

Subsequently, as shown in FIG.3 (c), when the glass plate 10 is further inserted, the front-end | tip part of the glass plate 10 will escape | deviate from the clearance gap forming members 111 and 112, and it will return flat. At this time, the rear end of the glass plate 10 is also flattened, and the first curved portion 13 and the second curved portion 14 are formed between the two flat portions 15 and 16 parallel to each other of the glass plate 10. In this state, the position of the first curved portion 13 and the position of the second curved portion 14 simultaneously move in the direction perpendicular to the first direction, and the position of the second curved portion 14 moves the first curved portion 13. Follow the position of. The moving directions of the first curved portion 13 and the second curved portion 14 are directions parallel to the flat portions 15 and 16.

Subsequently, as shown in FIG. 3D, when the glass plate 10 is further inserted, the rear end of the glass plate 10 is inserted into the gap forming members 111 and 112. Thereafter, the glass plate 10 as a whole passes through the gap forming members 111 and 112 through the state shown in FIG.

As shown in FIGS. 3A to 3E, the glass plate 10 passes through the gap forming members 111 and 112, thereby allowing both surfaces of the glass plate 10 (surface 11 and Tensile stresses are applied to two long edge portions 10a (see FIG. 2) and four chamfers 10c of the outer circumference of the back surface 12.

Subsequently, as shown in FIG. 5A, the direction of the glass plate 10 is changed, and the glass plate 10 is inserted between the first curved portions 111a and 112a, and the first glass plate 10 is inserted into the glass plate 10. The curved portion 13 is formed. This first curved portion 13 extends in the second direction from the end to the end of the glass plate 10. The second direction is the longitudinal direction of the glass plate 10 in the natural state.

Tensile stress is generated on the surface of the first curved portion 13. Since the glass plate 10 is cut | disconnected in the outer periphery of the surface of the 1st curved part 13, as shown in FIG.5 (b), in the outer periphery of the surface of the 1st curved part 13, the stress of a main orthogonal direction does not generate | occur | produce. , Stress occurs along the circumferential direction. Tensile stress is generated in the curved portion of the outer circumference of the surface of the first curved portion 13.

Subsequently, when the glass plate 10 is further inserted, the position of the 1st curved part 13 moves to the direction perpendicular | vertical to a 2nd direction, and the 2nd curved part 14 is formed in the glass plate 10. FIG. This second curved portion 14 extends in the second direction from the end to the end of the glass plate 10.

Thereafter, similarly to FIGS. 3A to 3E, the glass plate 10 exits between the gap forming members 111 and 112, whereby two short edges of the outer peripheries of both sides of the glass plate 10 are formed. Tensile stress is applied to 10b (see FIG. 2) and the four chamfers 10c.

As described above, in the present embodiment, by changing the position of the first curved portion 13, a tensile stress along the circumferential direction is applied to the entire circumference of the outer periphery of the surface 11 of the glass plate 10, and thus the position of the second curved portion 14. By changing, the tensile stress along the circumferential direction is applied to the entire outer circumference of the glass plate 10 back surface 12. Therefore, if there exists a defect somewhere in the outer peripheral part of the glass plate 10, since a crack is formed from the said defect as a starting point, the non-defective goods and a defective defective article can be discriminated with high precision. Moreover, since the outer peripheral part of the glass plate 10 is little by little bending deformation, the space for bending deformation can be reduced.

In addition, when the position of the 1st curved part 13 and the position of the 2nd curved part 14 change simultaneously, since one position follows the other position, the space for bending deformation can be further reduced.

Moreover, the 1st curved part 13 and the 2nd curved part 14 extend in a 1st direction from the edge part to the edge part of the glass plate 10, respectively, and are moved to the direction perpendicular | vertical to the said 1st direction, and thereafter, a 1st curved part It extends from the end part to the edge part of the glass plate 10 in a 2nd direction different from a direction, and is moved to the direction perpendicular | vertical to a 2nd direction. Therefore, two types of tensile stresses with different directions are applied to the entirety of both surfaces (surface 11 and rear surface 12) of glass plate 10. If a linear flaw is formed in the surface of either side, at least one of the tensile stresses acts in the direction in which the flaw develops and the crack is advanced, so that good and defective products can be discriminated with high accuracy.

In addition, in this embodiment, although the shape seen from the plane of the glass plate 10 is substantially rectangular, the shape may be various types, for example, circular, elliptical, polygonal etc. may be sufficient.

In addition, although four corners of the glass plate 10 are chamfered in this embodiment, they do not need to be chamfered, either. In this case, as shown in FIG. 6, when the 1st direction becomes inclined direction with respect to the longitudinal direction of the glass plate 10, both surfaces (surface 11 and back surface 12) of the glass plate 10, for example. Tensile stress along the circumferential direction is applied to the entire circumference of.

In addition, in this embodiment, although the 1st direction is the width direction of a glass plate, and the 2nd direction is the longitudinal direction of a glass plate, the 1st direction may be the longitudinal direction of a glass plate, and the 2nd direction may be the width direction of a glass plate.

[Second Embodiment]

In this embodiment, the structure of 1st embodiment and bending deformation means differ. Hereinafter, the difference will mainly be described.

It is a side view which shows a part of endurance test apparatus by 2nd embodiment of this invention.

The durability test apparatus 200 includes bending deformation means 210 for bending deformation of a portion of the glass plate 10. The bending deformation means 210 is provided with the flexible plate 211 which vacuum-adsorbs the glass plate 10, for example as shown in FIG. In addition, the bending deformation means 210 is connected to connect the end of the movable body 212, the telescopic actuator 214 and the movable body 212 and the end of the elastic actuator 214 fixed to the flexible plate 211 ( 216) a plurality of sets. The plurality of telescopic actuators 214 are supported by the support frame 218 and independently controlled by the controller 220.

The flexible plate 211 vacuum-adsorbs the glass plate 10. A plurality of movable bodies 212 are fixed to the side opposite to the adsorption face of the flexible plate 211. The flexible plate 211 is deformed in accordance with the movement of the plurality of movable bodies 212, and the glass plate 10 is deformed in accordance with the flexible plate 211.

Since the flexible plate 211 vacuum-adsorbs the glass plate 10, a desired adsorption force is obtained regardless of the size of each movable body 212. Therefore, the size of each movable body 212 can be reduced compared to the case where the plurality of movable bodies 212 directly vacuum-adsorbs the glass plate 10, and the shape of the movable body 212 deforms the glass plate 10. This is hard to be limited.

The flexible plate 211 is formed larger than the glass plate 10, and protrudes from the entire circumference of the outer circumference of the glass plate 10. The flexible plate 211 is comprised from the adsorption part 211a which vacuum-adsorbs the glass plate 10, and the main body plate 211b which supports the adsorption part 211a.

The adsorption part 211a is formed of rubber, such as silicone rubber. The adsorption part 211a should just be surface-treated in order to improve the peelability of rubber | gum and glass. A part of the adsorption part 211a may be comprised with a continuous foam made of rubber. Since the adsorption part 211a is made of rubber, it can be easily deformed, and deformation of the glass plate 10 is hardly limited according to the shape of the movable body 212.

The body plate 211b has a higher bending rigidity than the adsorption portion 211a. The bending rigidity per unit width (1 mm) of the main body plate 211b dominates the bending rigidity of the flexible plate 211. The bending rigidity of the flexible plate 211 may be, for example, 1000 to 40000 N · mm 2 / mm in order to achieve both bending prevention of the flexible plate 211 and proper bending deformation of the flexible plate 211.

The main body plate 211b is made of, for example, polyvinyl chloride (PVC) resin, polycarbonate resin, acrylic resin, polyacetal (POM) resin, or metal.

As illustrated in FIG. 8, a plurality of disk-shaped movable bodies 212 are fixed on the main body plate 211b at intervals. Bolts, adhesives and the like are used for this fixing.

The flexible plate 211 may adsorb the whole glass plate 10 and may adsorb only the outer peripheral part of the glass plate 10. The flexible plate 211 may have an opening in the center portion when only the outer peripheral portion of the glass plate 10 is adsorbed. Since the contact area of the flexible plate 211 and the glass plate 10 is reduced, it is difficult to scratch the glass plate 10.

8 is a plan view illustrating an arrangement example of a plurality of movable bodies. 8 shows the state before the start of bending deformation of the glass plate. In this state, the glass plate 10 is flat and the flexible plate 211 is flat.

At least one movable body 212 is fixed to a portion protruding from the glass plate 10 of the flexible plate 211. By controlling the movement of the part which protrudes from the glass plate 10 of the flexible plate 211, the movement of the outer peripheral part of the glass plate 10 can be finely controlled. The movable body 212 may be fixed to the part which adsorb | sucks the glass plate 10 of the flexible plate 211. As shown in FIG.

In addition, in this embodiment, although the at least 1 movable body 212 is fixed to the part protruding from the glass plate 10 of the flexible plate 211, all the movable bodies 212 are mentioned in 3rd Embodiment mentioned later. It may be fixed to the part which adsorb | sucks the glass plate 10 of the flexible plate 211. In this case, the flexible plate 211 should just be about the same size as the glass plate 10, and should not be protruded from the glass plate 10. FIG.

The expansion and contraction actuator 214 is, for example, an electric cylinder as shown in FIG. 7, and includes a cylinder body 214a, a rod 214b protruding from the cylinder body 214a so as to be elastic, and a servo motor 214c. It is composed. The rotational motion of the servo motor 214c is converted into linear motion by the ball screw mechanism accommodated in the cylinder body 214a, and is transmitted to the rod 214b. When the servo motor 214c rotates forward and backward, the rod 214b expands and contracts. The servo motor 214c is provided with an encoder for detecting the rotation speed of the servo motor 214c and a current sensor for detecting a supply current to the servo motor 214c. The detection signal of the encoder and the detection signal of the current sensor are respectively supplied to the controller 220.

In addition, although the expansion and contraction actuator 214 of this embodiment is an electric cylinder, a hydraulic cylinder, a linear motor, etc. may be sufficient.

The cylinder body 214a is supported by the support frame 218 via the cushion member 215. The cushion member 215 is made of urethane rubber or the like, for example. The cushion member 215 swings the cylinder body 214a so as to follow the bending deformation of the flexible plate 211.

The connecting portion 216 is provided with an end portion of the movable body 212 so that the movable body 212 can be rotated about a point on the centerline of the rod 214b in order to smooth the bending deformation of the flexible plate 211. Connect the ends of the rod 214b. The center of rotation of the movable body 212 is within 15 mm from the intersection of the surface and the center line on the opposite side to the flexible plate 211 in the glass plate 10 vacuum-adsorbed by the flexible plate 211 (preferably Within 5 mm).

The connection part 216 is comprised by the spherical joint, for example, and is comprised by the convex spherical part 216a integrated with the movable body 212, the concave spherical part 216b integrated with the rod 214b, etc. The center of curvature of the convex spherical surface portion 216a becomes the center of rotation of the movable body 212. The convex spherical portion 216a and the concave spherical portion 216b are always in contact with the pressing force of the spring (not shown). In addition, the connection part 216 may be comprised by the link mechanism.

The controller 220 is composed of a microcomputer including a CPU and a memory, and executes a program stored in the memory on the CPU, thereby independently controlling the plurality of expansion and contraction actuators 214 and bending the flexible plate 211. Let's do it.

The controller 220 controls the rotation of the servo motor 214c based on the detection signal supplied from the encoder. The controller 220 also detects the rotational torque (load) of the servo motor 214c based on the detection signal supplied from the current sensor.

The durability test apparatus 200 may further have the crack detector 230 which detects the crack formed in the glass plate 10 by bending deformation of the glass plate 10 with the bending deformation means 210. FIG. The crack detector 230 is comprised with the sound sensor etc. which detect the sound accompanying formation of a crack (creation, tremor, for example), for example. The sound sensor may be a sound collecting microphone. In addition, in this embodiment, an acoustic emission sensor (AE sensor) can also be used instead of a sound collecting microphone. The AE sensor is in close contact with the rear surface 12 of the glass plate 10.

In addition, the crack detector 230 may be comprised with the air pressure sensor which detects the vacuum degree of the adsorption | suction hole of the flexible plate 211, the current sensor which detects the supply current to the servomotor 214c, etc. As shown in FIG. The barometric pressure sensor can detect the change in the barometric pressure in the suction hole when the crack is formed. In addition, the current sensor can detect a change in the load of the servo motor 214c when a crack is formed.

Next, based on FIG. 9, operation | movement (durability test method) of the durability test apparatus 200 of the said structure is demonstrated. The operation of the durability test apparatus 200 is performed under the control by the controller 220. It is a side view of the durability test method by 2nd Embodiment of this invention. 9 (a) to 9 (e) are views corresponding to FIGS. 8 (a) to 8 (e).

The controller 220 flexibly deforms the flexible plate 211 as shown in FIGS. 9A through 9E by independently controlling the plurality of expansion and contraction actuators 214 and the flexible plate. The glass plate 10 adsorbed by 211 is bent and deformed. Since the series of movements of the glass plate 10 are the same as that of 1st Embodiment, description is abbreviate | omitted.

In this embodiment, similarly to 1st Embodiment, by changing the position of the 1st curved part 13, the tensile stress along a circumferential direction is applied to the outer periphery of the periphery of the glass plate 10 surface 11, and the 2nd curved part ( By changing the position of 14), tensile stress along the circumferential direction is applied to the entire circumference of the rear surface 12 of the glass plate 10. Therefore, if there exists a defect somewhere in the outer peripheral part of the glass plate 10, since a crack is formed from the said defect as a starting point, the non-defective goods and a defective defective product can be discriminated with high precision. In addition, since the outer circumferential portion of the glass plate 10 is little by little bending deformation, it is possible to reduce the space for bending deformation.

In addition, similarly to the first embodiment, when the position of the first curved portion 13 and the position of the second curved portion 14 simultaneously change, since one position follows the other position, the space for bending deformation Can be further reduced.

In addition, similarly to the first embodiment, the first curved portion 13 and the second curved portion 14 extend in the first direction from the end to the end of the glass plate 10, respectively, and move in the direction perpendicular to the first direction. Then, it extends from the edge part of the glass plate 10 to the edge part in a 2nd direction different from a 1st direction, and is moved to the direction perpendicular | vertical to a 2nd direction. Therefore, two types of tensile stresses with different directions are applied to the entirety of both surfaces (surface 11 and rear surface 12) of glass plate 10. If a linear flaw is formed in the surface of any one side, at least one tensile stress acts to expand the flaw, and the crack is advanced, so that good and defective products can be discriminated with high accuracy.

The bending deformation means 210 can change the extension direction of the 1st curved part 13 and the extension direction of the 2nd curved part 14, vacuum-adsorbing the glass plate 10 by the flexible plate 211. FIG. In addition, when a crack is formed before the extension direction change, vacuum adsorption may be canceled at the time a crack is detected.

The glass plate 10 may be vacuum-adsorbed on the lower surface of the flexible plate 211. After the vacuum adsorption is released, the glass plate 10 attached to the flexible plate 211 is likely to be separated by gravity.

In order to promote the separation of the glass plate 10 and the flexible plate 211, a compressed gas may be supplied to the adsorption holes of the flexible plate 211 after the vacuum suction release. In addition, after the vacuum suction release, the plurality of expansion and contraction actuators 214 may be extended at the same time and may be suddenly stopped at the same time. The glass plate 10 and the flexible plate 211 are easily separated by the impact.

When the crack detector 230 detects a crack, vacuum suction is released and the glass plate 10 falls to the waste box below. On the other hand, when the crack detector 230 did not detect a crack, the glass plate 10 is passed to a take-out machine. The support frame 218 is movable between the position where the glass plate 10 falls to the waste box, and the position where the glass plate 10 is passed to the take-out machine.

[Third embodiment]

Although the bending deformation means 210 similar to 2nd Embodiment is used in this embodiment, a series of movements of the flexible board 211 controlled by the controller 220 differ, and a series of movements of a glass plate differ. Hereinafter, the difference will mainly be described.

10 and 11 are perspective views of the durability test method according to the third embodiment of the present invention. In FIG. 10 and FIG. 11, illustration of the bending deformation | transformation means 210, such as the flexible plate 211, is abbreviate | omitted for convenience.

First, as shown to Fig.10 (a), the 1st curved part 13 and the 2nd curved part 14 are formed in the glass plate 10 simultaneously. The state of FIG. 10A is substantially the same as the state of FIG. 8C.

The first curved portion 13 extends from the end to the end of the glass plate 10 through the center of the glass plate 10. Tensile stress is generated on the surface of the first curved portion 13. Since the glass plate 10 is cut | disconnected at the outer periphery of the surface of the 1st curved part 13, the stress of a main orthogonal direction does not generate | occur | produce on the outer periphery of the surface of the 1st curved part 13, and the stress along a circumferential direction arises. Tensile stress is generated in the curved portion of the outer circumference of the surface of the first curved portion 13.

The second curved portion 14 extends from the end portion of the glass plate 10 to the end portion through the center portion of the glass plate 10. Tensile stress is generated on the rear surface of the second curved portion 14. Since the glass plate 10 is cut | disconnected at the outer periphery of the back surface of the 2nd curved part 14, the stress of a main orthogonal direction does not generate | occur | produce on the outer periphery of the back surface of the 2nd curved part 14, and the stress along a circumferential direction arises. Tensile stress is generated in the curved part of the outer periphery of the rear surface of the second curved part 14.

The first curved portion 13 and the second curved portion 14 are formed between two flat portions 15, 16 parallel to each other of the glass plate 10. In this state, as shown in FIGS. 10A to 10C, 11D, and 11E, the first curved portion 13 and the second curved portion 14 are formed. At the same time, the center of the glass plate 10 is rotated 180 degrees or more in the counterclockwise direction. The rotation axis is perpendicular to the flat portions 15 and 16. Thereby, the tensile stress along a circumferential direction is added to the outer periphery whole periphery of the glass plate 10 both surfaces.

In this embodiment, similarly to 1st Embodiment, by changing the position of the 1st curved part 13, the tensile stress along a circumferential direction is applied to the outer periphery of the periphery of the glass plate 10 surface 11, and the 2nd curved part ( By changing the position of 14), tensile stress along the circumferential direction is applied to the entire circumference of the rear surface 12 of the glass plate 10. Therefore, if there exists a defect somewhere in the outer peripheral part of the glass plate 10, since a crack is formed from the said defect as a starting point, the non-defective goods and a defective defective article can be discriminated with high precision. Moreover, since the outer peripheral part of the glass plate 10 is little by little bending deformation, the space for bending deformation can be reduced.

In addition, when the position of the 1st curved part 13 and the position of the 2nd curved part 14 change simultaneously, since one position follows the other position, the space for bending deformation can be further reduced.

In addition, the 1st curved part 13 and the 2nd curved part 14 extend from the edge part of the glass plate 10 to the edge part through the center part of the glass plate 10, respectively, and are rotated about the center part of the glass plate 10. As shown in FIG. Therefore, the tensile stress is applied to approximately the entire glass plate 10. If there exists a defect inside the outer peripheral part of the glass plate 10, a crack will be easily formed from the defect as a starting point, and an inside defect can be detected.

As mentioned above, although 1st thru | or 3rd embodiment of this invention was described, this invention is not limited to the said embodiment. Various modifications and variations are possible within the scope of the present invention as set forth in the claims.

This application is based on the JP Patent application 2012-113847 of an application on May 17, 2012, The content is taken in here as a reference.

10: brittle plate
11: surface
12: back side
13: first bend
14: second curved portion
15, 16: flat part
100: Endurance Test Device
110: bending deformation means
111, 112: gap formation member
111a, 112a: first curved portion
111b, 112b: second curved portion
130: crack detector
200: Endurance Test Device
210: bending deformation means
211: flexible plate
212 movable body
214: telescopic actuator
214a: cylinder body
214b: load
214c: servo motor
215: cushion member
216: connection
216a: convex sphere
216b: concave spherical portion
218: support frame
220: controller
230: crack detector

Claims (11)

In the brittle plate, by forming a first curved portion that generates a tensile stress on the surface of the brittle plate, by changing the position of the first curved portion, a tensile stress along the circumferential direction is applied to the entire circumference of the surface of the brittle plate,
In the brittle plate, a second curved portion in which tensile stress is generated is formed on the rear surface of the brittle plate, and the tensile stress along the circumferential direction is applied to the entire circumference of the outer circumference of the rear surface of the brittle plate by changing the position of the second curved portion. Durability test method of brittle plate. The durability test method for a brittle plate according to claim 1, wherein when changing the position of the first curved portion and the position of the second curved portion at the same time, one position is followed by the other position. The first curved portion and the second curved portion extend in a first direction from an end portion to an end portion of the brittle plate, respectively, and move in a direction perpendicular to the first direction. And an endurance test method of a brittle plate extending from an end portion to an end portion of the brittle plate in a second direction different from the first direction, and moving in a direction perpendicular to the second direction. The said 1st curved part and the said 2nd curved part are each extended from the edge part of the said brittle plate to the edge part through the center part of the said brittle plate, and are rotated about the center part of the said brittle plate, Durability test method of brittle plate. The method for testing the durability of the brittle plate according to any one of claims 1 to 4, wherein the brittle plate comprises a glass plate. And bending deformation means for bending deformation of a part of the brittle plate,
The bending deformation means,
In the brittle plate, by forming a first curved portion that generates a tensile stress on the surface of the brittle plate, by changing the position of the first curved portion, a tensile stress along the circumferential direction is applied to the entire circumference of the surface of the brittle plate,
In the brittle plate, a second curved portion in which tensile stress is generated is formed on the rear surface of the brittle plate, and the tensile stress along the circumferential direction is applied to the entire circumference of the outer circumference of the rear surface of the brittle plate by changing the position of the second curved portion. Durability test device of brittle plate. The durability test apparatus for a brittle plate according to claim 6, wherein the bending deformation means follows one position to the other when the position of the first curved portion and the position of the second curved portion are changed at the same time. The method according to claim 6 or 7, wherein the first curved portion and the second curved portion extend in a first direction from an end portion to an end portion of the brittle plate, respectively, and move in a direction perpendicular to the first direction. And an endurance test apparatus for a brittle plate extending from an end portion to an end portion of the brittle plate in a second direction different from the first direction, and moving in a direction perpendicular to the second direction. The said 1st curved part and the said 2nd curved part are each extended from the edge part of the said brittle plate to the edge part through the center part of the said brittle plate, and are rotated about the center part of the said brittle plate, respectively. Durability test device of brittle plate. The said bending deformation means has a flexible plate which adsorb | sucks the brittle plate,
The flexible plate is an endurance test apparatus for a brittle plate comprising a rubber adsorbing portion for adsorbing the brittle plate and a body plate to which the adsorption portion is fixed. The method of claim 10, wherein the bending deformation means has a plurality of sets of a movable body, a telescopic actuator fixed to the main body plate and a set of connecting portions connecting the end of the movable body and the end of the telescopic actuator,
And said plurality of sets of said telescopic actuators are supported by a support frame.

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