Glass sheet breaking apparatus and method of manufacturing a glass sheet

Abstract

A glass sheet breaking apparatus and a glass sheet manufacturing method. A glass sheet breaking apparatus (1) for a glass sheet (G) having a scribe line (S) formed on an upper surface (Gs) side along a boundary between a product portion (Ga) and a non-product portion (Gb) includes a holding member (2) that holds the glass sheet, a breaking member (3) that pushes the glass sheet from a lower surface (Gt) side to break the glass sheet along the scribe line, and a recovery member (4) that recovers the non-product portion separated from the product portion along with the breaking. The holding member has a second pressing portion (8a) that presses the non-product portion from the upper surface side. The recovery member has a suction pad (4a) that suctions the non-product portion from the upper surface side. A width (W1) of a first contact area (A1) in which the second pressing portion contacts the non-product portion and a width (W2) of a second contact area (A2) in which the suction pad contacts the non-product portion overlap when viewed in a direction in which the scribe line extends.

Description

Technical Field

[0001] This disclosure relates to a glass plate breaking device and a method for manufacturing a glass plate. Background Technology

[0002] As is well known, the manufacturing process of glass plates typically includes the process of cutting off parts (hereinafter referred to as non-product parts) from the glass plate, which is the raw material for the product glass plate, and then discarding the cut-off non-product parts. As an example of how this process is performed, the method disclosed in Patent Document 1 can be cited.

[0003] In the method disclosed in this document, firstly, a glass plate with a scribed line formed along the boundary between the part that will later become the product glass plate (hereinafter referred to as the product section) and the non-product section is broken along the scribed line. Then, in order to discard the non-product section that is separated from the product section along with the breakage, the non-product section is recycled.

[0004] When performing the above method, use Figure 12 as well as Figure 13 The breaking device 100 is shown. It should be noted that... Figure 12 The image shows the state of glass plate G before it breaks. Figure 13 The broken state is shown. The breaking device 100 includes: a holding member 200 that holds a glass plate G with a scribed line S formed on the upper surface Gs side along the boundary between the product section Ga and the non-product section Gb; a breaking member 300 that pushes the glass plate G held in the holding member 200 from the lower surface Gt side, thereby applying bending stress to the part forming the scribed line S and breaking the glass plate G along the scribed line S; and a recovery member 400 that recovers the non-product section Gb that is separated from the product section Ga along with the breaking by the breaking member 300.

[0005] The holding member 200 includes: a first mounting platform 500 and a second mounting platform 600, which support the product portion Ga and the non-product portion Gb of the glass plate G from the lower surface Gt side, respectively; and a first pressing member 700 and a second pressing member 800, which press the product portion Ga and the non-product portion Gb from the upper surface Gs side, respectively. The breaking member 300 is movable along the thickness direction (Z direction) of the glass plate G and can push the glass plate G between the two mounting platforms 500 and 600. The recovery member 400 includes an adsorption pad 900 for adsorbing the upper surface Gs of the broken non-product portion Gb in order to recover the non-product portion Gb.

[0006] The first pressing member 700 and the second pressing member 800 are each formed in a long strip along the direction (Y direction) in which the score line S extends. The plurality of adsorption pads 900 are provided in the recovery member 400, and the plurality of adsorption pads 900 are arranged along the direction in which the score line S extends.

[0007] The second pressing member 800 and each of the adsorption pads 900 are in contact with the non-product portion Gb of the glass plate G from the upper surface Gs side, and the positions of the regions in contact with the non-product portion Gb differ between the second pressing member 800 and the adsorption pads 900. In detail, when viewed from the direction in which the score line S extends (when viewed from the Y direction), the contact region A1 (indicated by a thick line in FIG. 8) in which the second pressing member 800 is in contact with the non-product portion Gb, and the contact region A2 (indicated by a thick line in FIG. 8) in which the adsorption pad 900 is in contact with the non-product portion Gb are arranged laterally in the width direction (X direction) of the non-product portion Gb. Note that the contact region A2 is arranged closer to the score line S (closer to the boundary between the product portion Ga and the non-product portion Gb) than the contact region A1. Figure 12 Figure 13 In detail, when viewed from the direction in which the score line S extends (when viewed from the Y direction), the contact region A1 (indicated by a thick line in FIG. 8) in which the second pressing member 800 is in contact with the non-product portion Gb, and the contact region A2 (indicated by a thick line in FIG. 8) in which the adsorption pad 900 is in contact with the non-product portion Gb are arranged laterally in the width direction (X direction) of the non-product portion Gb. Note that the contact region A2 is arranged closer to the score line S (closer to the boundary between the product portion Ga and the non-product portion Gb) than the contact region A1.

[0008] Prior Art Documents

[0009] Patent Documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 2018-154514 SUMMARY

[0011] PROBLEMS TO BE SOLVED BY THE INVENTION

[0012] However, in the case where the above-described breaking device 100 is used, the following problem occurs: when the width (dimension in the X direction) of the non-product portion Gb in the glass plate G is narrow, breaking failure of the glass plate G easily occurs. This is because, due to the relationship that the contact region A1 and the contact region A2 are arranged laterally in the width direction of the non-product portion Gb, in the case where the width of the non-product portion Gb is narrow, it is difficult to secure both the contact region A1 and the contact region A2 on the non-product portion Gb.

[0013] In view of the above, the technical problem to be solved is to prevent the occurrence of breaking failure even in the case where the width of the non-product portion is narrow when the non-product portion is broken from the glass plate by breaking.

[0014] MEANS FOR SOLVING THE PROBLEM

[0015] ​A glass sheet breaking apparatus for solving the above-described problem includes: a holding member that holds a glass sheet having a score line formed on one side along a boundary between a product portion and a non-product portion; a breaking member that pushes the glass sheet held by the holding member from the other side to apply a bending stress to a portion where the score line is formed, and breaks the glass sheet along the score line; and a recovery member that recovers the non-product portion separated from the product portion by the breaking by the breaking member, the holding member has a pressing portion that presses the non-product portion to hold the glass sheet, the recovery member has a suction portion that suctions the non-product portion to recover the non-product portion, the pressing portion and the suction portion are configured to contact the non-product portion from the same side of the glass sheet, and the glass sheet breaking apparatus is characterized in that, when viewed in a direction in which the score line extends, a width of a first contact region in which the pressing portion contacts the non-product portion and a width of a second contact region in which the suction portion contacts the non-product portion overlap.

[0016] The glass sheet breaking apparatus is configured such that, when viewed in a direction in which the score line extends, a width of a first contact region in which the pressing portion contacts the non-product portion and a width of a second contact region in which the suction portion contacts the non-product portion overlap. By overlapping the widths of the two contact regions in this way, it is possible to easily ensure both the first contact region and the second contact region on the non-product portion even when the non-product portion is narrow. As a result, it is possible to prevent the occurrence of breaking defects. Furthermore, since it is possible to prevent the occurrence of breaking defects, it is also possible to avoid a decrease in the production efficiency of the glass sheet.

[0017] In the above-described structure, it is preferable that the holding member have a plurality of pressing portions and the recovery member have a plurality of suction portions.

[0018] In this case, the holding member has a plurality of pressing portions, and thus it is possible to reduce costs related to the pressing portions compared to a case in which the holding member has a single pressing portion that is long (elongated in a direction in which the score line extends). In addition, the pressing portions and the suction portions each exist in a plurality, and thus it is possible to replace only the pressing portion or the suction portion when a failure occurs in the pressing portion or the suction portion, for example. Therefore, it is also possible to reduce equipment costs and maintenance costs.

[0019] In the above-described structure, it is preferable that, when viewed in a direction in which the score line extends, an entire width of a region in which the width is relatively narrow among the first contact region and the second contact region be included in a width of a region in which the width is relatively wide.

[0020] In this case, since the entire width of the region in which the width is relatively narrow is included in the width of the region in which the width is relatively wide, it is possible to prevent the occurrence of breaking defects even when the non-product portion is narrow.

[0021] In the above structure, it is preferable that the first contact region and the second contact region are alternately arranged in a direction in which the score line extends.

[0022] In this way, the pressing of the non-product portion by the pressing portion and the suction of the non-product portion by the suction portion can be stabilized.

[0023] Further, a glass sheet manufacturing method for solving the above problem includes: a holding step of holding a glass sheet in which a score line is formed on one side along a boundary between a product portion and a non-product portion; a breaking step of, during execution of the holding step, pressing the glass sheet from the other side to apply a bending stress to a formed portion of the score line, and breaking the glass sheet along the score line; and a recovery step of, after execution of the breaking step, recovering a non-product portion that is separated from the product portion by the breaking, in the holding step, the non-product portion is pressed for holding the glass sheet, in the recovery step, the non-product portion is suctioned for recovering the non-product portion, the pressing of the non-product portion in the holding step and the suction of the non-product portion in the recovery step are performed with respect to the same surface of the non-product portion, and characterized in that, when viewed in a direction in which the score line extends, a width of a region of the non-product portion that is pressed in the holding step overlaps with a width of a region of the non-product portion that is suctioned in the recovery step.

[0024] According to the present method, the same effects as described above with respect to the glass sheet breaking apparatus can be obtained.

[0025] Effects of the Invention

[0026] According to the glass sheet breaking apparatus and the glass sheet manufacturing method according to the present disclosure, when a non-product portion is separated from a glass sheet by breaking, even in a case where the non-product portion is narrow, occurrence of a breaking defect can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a side view showing a glass sheet breaking apparatus.

[0028] Figure 2 is a front view showing a glass sheet breaking apparatus.

[0029] Figure 3 is a front view showing a glass sheet breaking apparatus.

[0030] Figure 4 is a plan view showing a first contact region to a third contact region.

[0031] Figure 5 is a side view showing a glass sheet manufacturing method.

[0032] Figure 6 is a side view showing a method of manufacturing a glass sheet.

[0033] Figure 7 is a side view showing a method of manufacturing a glass sheet.

[0034] Figure 8 is a side view showing a method of manufacturing a glass sheet.

[0035] Figure 9 is a side view showing a method of manufacturing a glass sheet.

[0036] Figure 10 is a plan view showing a state when a second pressing portion and a suction pad are viewed from below in a modification example of a breaking apparatus of a glass sheet.

[0037] Figure 11 is a plan view showing a first contact region to a third contact region in a modification example.

[0038] Figure 12 is a side view showing a conventional breaking apparatus of a glass sheet.

[0039] Figure 13 is a side view showing a conventional breaking apparatus of a glass sheet.

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 1... breaking apparatus;

[0042] 2... holding member;

[0043] 3... breaking member;

[0044] 4... recovery member;

[0045] 4a... suction pad;

[0046] 8a... second pressing portion;

[0047] A1... first contact region;

[0048] A2... second contact region;

[0049] G... glass sheet;

[0050] Ga... product portion;

[0051] Gb... non-product portion;

[0052] Gs... upper surface;

[0053] Gt... lower surface;

[0054] P1... holding step;

[0055] P2... breaking process;

[0056] P3... recycling process;

[0057] S... score line;

[0058] W1... width of first contact area;

[0059] W2... width of second contact area. DETAILED DESCRIPTION

[0060] Hereinafter, a glass sheet breaking apparatus and a glass sheet manufacturing method according to an embodiment will be described with reference to the drawings. Note that the X direction, the Y direction, and the Z direction shown in each of the drawings referred to in the description of the embodiment are mutually orthogonal directions.

[0061] <Breaking apparatus for glass sheet>

[0062] Figure 1 The glass sheet breaking apparatus 1 (hereinafter, simply referred to as the breaking apparatus 1) shown is an apparatus that breaks a glass sheet G formed with a score line S along the boundary between a product portion Ga and a non-product portion Gb to separate the two portions Ga, Gb, and recycles the non-product portion Gb after the separation for disposal (see FIG. 1). Note that the product portion Ga is a portion that becomes a product glass sheet later, and the non-product portion Gb is a portion that is disposed of. Figure 6 and Figure 9 ). Note that the product portion Ga is a portion that becomes a product glass sheet later, and the non-product portion Gb is a portion that is disposed of.

[0063] The breaking apparatus 1 includes a holding member 2 that holds the glass sheet G formed with the score line S on the upper surface Gs side, a breaking member 3 that pushes the glass sheet G held by the holding member 2 from the lower surface Gt side to break it along the score line S, and a recycling member 4 that recycles the non-product portion Gb separated from the product portion Ga by the breaking by the breaking member 3.

[0064] The glass sheet G that is the object of breaking is rectangular, and the score line S is formed in a straight line shape in parallel with one side of the rectangle that the glass sheet G assumes (in the present embodiment, formed along the Y direction). The thickness of the glass sheet G is, for example, 2 mm or less, and is preferably 0.2 mm to 0.7 mm. The width (dimension along the X direction) of the non-product portion Gb of the glass sheet G is, for example, 45 mm or less, and is preferably 35 mm or less, and more preferably 25 mm or less. On the other hand, if the width of the non-product portion Gb of the glass sheet G is too narrow, breaking becomes difficult, and thus the lower limit of the width of the non-product portion Gb of the glass sheet G is preferably 15 mm or more.

[0065] The retaining member 2 includes: a first support member 5 and a second support member 6, which support the product portion Ga and the non-product portion Gb of the glass plate G from the lower surface Gt side, respectively; and a first pressing member 7 and a second pressing member 8, which press the product portion Ga and the non-product portion Gb from the upper surface Gs side, respectively. The retaining member 2 clamps the product portion Ga in the thickness direction using the first support member 5 and the first pressing member 7, and clamps the non-product portion Gb in the thickness direction using the second support member 6 and the second pressing member 8, thereby enabling the glass plate G to be held in a flat position (see reference). Figure 5 ).

[0066] Here, the first support member 5 and the second support member 6 are not limited to... Figure 1 The support platform-like component shown can also be replaced by a conveyor (belt conveyor, roller conveyor, etc.). For example, the transport direction can be set to the X direction, the second support member 6 can be a conveyor on the upstream side, and the first support member 5 can be a conveyor on the downstream side. In this case, the glass plate G is transported into the breaking device 1 via the two conveyors, with the scribe line S positioned above the breaking member 3, and the broken product part Ga is removed from the breaking device 1 via the downstream conveyor. Alternatively, the transport direction can be set to the X direction, the second support member 6 can be a conveyor on the downstream side, and the first support member 5 can be a conveyor on the upstream side. Alternatively, the transport direction can be set to the Y direction.

[0067] The first pressing member 7 and the second pressing member 8 can, as Figure 1 As indicated by the arrows, they move along the vertical direction (Z direction). Furthermore, the two pressing members 7 and 8 are structured to press the product section Ga and the non-product section Gb respectively as they move downwards.

[0068] The first pressing member 7 has a portion, namely the first pressing portion 7a, that contacts the upper surface Gs of the product portion Ga and directly presses the product portion Ga. Similarly, the second pressing member 8 has a portion, namely the second pressing portion 8a, that contacts the upper surface Gs of the non-product portion Gb and directly presses the non-product portion Gb. The first pressing portion 7a and the second pressing portion 8a are each formed as cylinders with their center lines extending in the Y direction. Of course, this is not a limitation; as a variation of this embodiment, the two pressing portions 7a and 8a may also be formed as quadrangular prisms. The first pressing portion 7a and the second pressing portion 8a are made of elastic members and can be elastically deformed under external force. As the material for the first pressing portion 7a and the second pressing portion 8a, materials such as rubber (natural rubber, synthetic rubber, etc.) and sponge may be used. In addition, as a variation of this embodiment, the first pressing portion 7a and the second pressing portion 8a may also be made of brushes.

[0069] The recycling component 4 has an adsorption pad 4a as an adsorption part, which contacts the upper surface Gs of the separated non-product part Gb to adsorb the non-product part Gb. The adsorption surface of the adsorption pad 4a is circular. Of course, it is not limited to this; as a variation of this embodiment, the adsorption surface may also be quadrilateral, polygonal, elliptical, etc. The adsorption pad 4a can be used as follows: Figure 1 The device moves along a direction inclined relative to the vertical direction (hereinafter referred to as the inclined direction), as indicated by the arrow. Furthermore, the adsorption pad 4a is configured to adsorb the segmented non-product portion Gb after moving downwards along this inclined direction. It should be noted that the angle between this inclined direction and the vertical direction is preferably 1° to 30°, more preferably 1.5° to 15°, and most preferably 2° to 10°. For example, polyurethane can be used as the material for the part of the adsorption pad 4a that contacts the non-product portion Gb.

[0070] It should be noted that the reason for moving the adsorption pad 4a along the inclined direction as described above is as follows. The non-product section Gb, after being separated, becomes a state where its end (the end adjacent to the separated product section Ga) is lifted by the breaking member 3 (see reference). Figure 7 Furthermore, the non-product part Gb in this state is adsorbed using the adsorption pad 4a. Therefore, if the adsorption pad 4a is brought into contact with the non-product part Gb while the upper surface Gs of the non-product part Gb, which is tilted relative to the horizontal plane as much as possible, is parallel to the adsorption surface of the adsorption pad 4a, smooth adsorption is facilitated.

[0071] Here, as a variation of this embodiment, the adsorption pad 4a does not necessarily have to be able to move along the inclined direction described above. For example, the adsorption pad 4a may also be able to move along the vertical direction.

[0072] The aforementioned second pressing member 8 and the adsorption pad 4a are both mounted on a shared moving mechanism 9. The moving mechanism 9 can move freely along the XZ plane. The moving mechanism 9 has the function of using the adsorption pad 4a, which adsorbs the broken non-product part Gb, to transport the non-product part Gb to a waste conveyor (not shown).

[0073] The break member 3 is formed as a strip along the Y direction and is disposed between the first support member 5 and the second support member 6. The break member 3 can be... Figure 1 The glass plate G moves vertically as indicated by the arrow. Furthermore, the breaking member 3, accompanying its upward movement, exerts bending stress on the forming portion of the scribed line S in the glass plate G, thereby breaking the glass plate G.

[0074] The breaking member 3 has a pushing surface that contacts the lower surface Gt of the glass sheet G and directly pushes the glass sheet G, and a pair of inclined surfaces that are inclined on both sides of the pushing surface. The pushing surface contacts the lower surface Gt of the glass sheet G in a state of sandwiching the score line S and straddling the product portion Ga and the non-product portion Gb. The width (dimension along the X direction) of the pushing surface is preferably 3 mm to 15 mm. In addition, the angle that the pushing surface makes with the inclined surfaces is preferably 30° to 50°.

[0075] As shown in Figure 2 and Figure 3 The second pressing portions 8a and the adsorption pads 4a are each provided in a plurality, and the plurality of second pressing portions 8a and the plurality of adsorption pads 4a are alternately arranged along the Y direction. The second pressing portions 8a and the adsorption pads 4a are each movable (vertically movable) independently of the other. The length along the Y direction of the plurality of second pressing portions 8a is not necessarily uniform among the plurality of second pressing portions 8a. The interval between the adjacent adsorption pads 4a, 4a is not necessarily uniform.

[0076] Note that the purpose of making the length along the Y direction of the plurality of second pressing portions 8a not uniform among the plurality of second pressing portions 8a as described above is as follows. The glass sheet G that is the object of breaking has a product portion Ga corresponding to various sizes (for example, G8 size, G8.5 size, and the like). The purpose is to make the second pressing portions 8a, not the adsorption pads 4a, contact the end portion in the Y direction of the glass sheet G even when the glass sheet G that is the object of breaking has a product portion Ga corresponding to any size.

[0077] Here, as described above, the second pressing portions 8a are provided in a plurality, and on the other hand, the first pressing portion 7a is a single member formed in a long strip along the Y direction. This is of course not limiting, and as a modification of the present embodiment, the first pressing portion 7a can also be composed of a plurality of members.

[0078] Figure 4 A state when viewed from above the glass sheet G is shown. In this drawing, each region indicated by a diagonal line is a first contact region Al where the second pressing portion 8a contacts the non-product portion Gb when the second pressing portion 8a presses the non-product portion Gb, a second contact region A2 where the adsorption pad 4a contacts the non-product portion Gb when the adsorption pad 4a adsorbs the non-product portion Gb, and a third contact region A3 where the first pressing portion 7a contacts the product portion Ga when the first pressing portion 7a presses the product portion Ga. The first contact region Al to the third contact region A3 are each a region present on the upper surface Gs of the glass sheet G.

[0079] According to the arrangement of the plurality of second pressing portions 8a and the plurality of adsorption pads 4a described above, the first contact regions Al and the second contact regions A2 are alternately arranged in the direction (Y direction) in which the score line S extends. On the other hand, according to the structure of the first pressing portion 7a described above, the third contact region A3 is a single region that is long in the direction in which the score line S extends.

[0080] The first contact region Al is a substantially rectangular region. This is because, when the second pressing portion 8a presses the non-product portion Gb, the lower portion of the cylinder of the second pressing portion 8a is flatly deformed (elastically deformed) in conjunction with contact with the upper surface Gs of the non-product portion Gb. For the same reason, the third contact region A3 is also a substantially rectangular region. On the other hand, the second contact region A2 is a substantially circular region. This is because the adsorption surface of the adsorption pad 4a is circular.

[0081] When viewed in the direction in which the score line S extends, the width W2 of the second contact region A2 is wider than the width Wl of the first contact region Al. Also, the entire width (width Wl) of the first contact region Al is accommodated within the width W2 of the second contact region A2. In order to satisfy this condition, the dimensions and arrangement of the second pressing portion 8a and the adsorption pad 4a are adjusted.

[0082] Here, as a modification of the present embodiment, in the arrangement of the plurality of second pressing portions 8a and the plurality of adsorption pads 4a, the second pressing portions 8a and the adsorption pads 4a can also be arranged non-alternately. In other words, the second pressing portions 8a can also be continuous at a portion of the arrangement, and the adsorption pads 4a can also be continuous at a portion of the arrangement. Also, the size relationship between the width Wl of the first contact region Al and the width W2 of the second contact region A2 can also be opposite to that of the present embodiment, and the width Wl and the width W2 can also be equal. Furthermore, the entire width of the region of one of the two contact regions Al, A2 does not necessarily have to be accommodated within the width of the region of the other, as long as at least a portion of the two contact regions Al, A2 overlap in the X direction.

[0083] <Method for manufacturing glass sheet>

[0084] Next, a method for manufacturing a glass sheet using the breaking apparatus 1 described above will be described. The present manufacturing method includes a holding process P1 ( Figure 5 ), a breaking process P2 ( Figure 6 ), and a recovery process P3 ( Figures 7-9 ).

[0085] As Figure 5As shown in Fig. 1, in the holding process P1, the glass plate G having the score line S formed thereon is held by the holding member 2. Specifically, the first pressing member 7 and the second pressing member 8 are moved downward, respectively, and in conjunction therewith, the product portion Ga and the non-product portion Gb of the glass plate G in a state of being supported by the first support member 5 and the second support member 6 with the lower surface Gt are pressed from the upper surface Gs side, respectively. Thus, the glass plate G is held in a flat posture. Note that the score line S is formed in the glass plate G by a wheel cutter, laser irradiation, or the like before the execution of the holding process.

[0086] As shown in Fig. 2, in the breaking process P2, the glass plate G is pushed from the lower surface Gt side to break along the score line S. Specifically, in a state where the glass plate G is held by the holding member 2, the breaking member 3 is moved upward, and in conjunction therewith, the formed portion of the score line S in the glass plate G is lifted. Thus, the formed portion of the score line S is deformed so as to protrude from the upper surface Gs side, and in conjunction with the deformation, a bending stress acts on the formed portion. By the action of the bending stress, a median crack included in the score line S progresses in the thickness direction of the glass plate G, and thus the glass plate G is divided into the product portion Ga and the non-product portion Gb. Figure 6 As shown in Fig. 3, in the recovery process P3, first, as a preparation for recovering the divided non-product portion Gb for disposal, the divided non-product portion Gb is adsorbed by the adsorption pad 4a. Specifically, after the adsorption pad 4a is moved downward so that the adsorption surface of the adsorption pad 4a comes into contact with the upper surface Gs of the non-product portion Gb, the non-product portion Gb is adsorbed to the adsorption pad 4a by a negative pressure. Note that the adsorption of the non-product portion Gb by the adsorption pad 4a is preferably performed in a state where the lifting of the end portion of the non-product portion Gb (the end portion adjacent to the product portion Ga) by the breaking member 3 and the pressing of the non-product portion Gb by the second pressing member 8 are maintained. The purpose is to prevent a decrease in the quality of the product portion Ga due to contact between the divided product portion Ga and the non-product portion Gb. At this time, the non-product portion Gb adsorbed to the adsorption pad 4a is in a state where the upper surface Gs thereof is inclined.

[0087] Figure 7 After the adsorption of the non-product portion Gb by the adsorption pad 4a described above is completed, next, as shown in Fig. 4, the second pressing member 8 is moved upward, and in conjunction therewith, the pressing of the non-product portion Gb by the second pressing member 8 is released. Note that the lifting of the end portion of the non-product portion Gb by the breaking member 3 is also preferably maintained at the time of releasing the pressing.

[0088] After the adsorption of the non-product portion Gb by the adsorption pad 4a described above is completed, next, as shown in Fig. 4, the second pressing member 8 is moved upward, and in conjunction therewith, the pressing of the non-product portion Gb by the second pressing member 8 is released. Note that the lifting of the end portion of the non-product portion Gb by the breaking member 3 is also preferably maintained at the time of releasing the pressing. Figure 8

[0089] ​​After the release of the pressing of the non-product portion Gb by the second pressing member 8 is completed, next, as shown in FIG. 9, the moving mechanism 9 is moved upward, and in conjunction therewith, the broken non-product portion Gb is recovered. The recovered non-product portion Gb is carried to a conveyor for disposal by the moving mechanism 9, and is carried to a disposal site by the conveyor to be disposed. On the other hand, the broken product portion Ga becomes a product glass sheet after being washed, inspected, and the like. The above manufacturing method is completed. Figure 9 As shown in FIG. 9, the moving mechanism 9 is moved upward, and in conjunction therewith, the broken non-product portion Gb is recovered. The recovered non-product portion Gb is carried to a conveyor for disposal by the moving mechanism 9, and is carried to a disposal site by the conveyor to be disposed. On the other hand, the broken product portion Ga becomes a product glass sheet after being washed, inspected, and the like. The above manufacturing method is completed.

[0090] Hereinafter, the main effects and advantages of the breaking apparatus 1 and the manufacturing method according to the above will be described.

[0091] In the above breaking apparatus 1 and the manufacturing method, the width Wl of the first contact region Al in which the second pressing portion 8a contacts the non-product portion Gb, and the width W2 of the second contact region A2 in which the adsorption pad 4a contacts the non-product portion Gb overlap when viewed from the direction (Y direction) in which the score line S extends. By the widths Wl, W2 of the two contact regions Al, A2 overlapping, even in the case where the width (dimension along the X direction) of the non-product portion Gb is narrow, it is possible to easily ensure both the first contact region Al and the second contact region A2 on the non-product portion Gb. As a result, it is possible to prevent the occurrence of breaking defects of the glass sheet G.

[0092] Here, with respect to the breaking apparatus 1 and the manufacturing method described by the above embodiment, the modified examples shown in Figure 10 and Figure 11 may also be applied. Figure 10 is a plan view showing the state when the second pressing portion 8a and the adsorption pad 4a are viewed from below. As shown in this figure, instead of the plurality of second pressing portions 8a and the plurality of adsorption pads 4a in the above embodiment, a single second pressing portion 8a and a plurality of adsorption pads 4a formed in a long strip along the Y direction can be used. In this modified example, the same number of through holes 8aa (through holes passing through the second pressing portion 8a from top to bottom) as the number of adsorption pads 4a are formed in the second pressing portion 8a. When viewed from the Z direction, the opening area of the through hole 8aa is larger than the adsorption pad 4a by one turn. The structure is such that the adsorption pad 4a moves up and down within this through hole 8aa. In this modified example, as shown in Figure 11 , the size relationship between the width Wl of the first contact region Al and the width W2 of the second contact region A2 is reversed from the above embodiment (width Wl > width W2), and the entire width (width W2) of the second contact region A2 is accommodated within the width Wl of the first contact region Al.

Claims

1. A glass sheet breaking apparatus comprising: a holding member that holds a glass sheet having a score line formed on one side along a boundary between a product portion and a non-product portion; a breaking member that presses the glass sheet held by the holding member from the other side to apply a bending stress to a formed portion of the score line and break the glass sheet along the score line; and a recovery member that recovers the non-product portion separated from the product portion by breaking by the breaking member, the holding member has a pressing portion that directly presses the non-product portion in order to hold the glass sheet, the recovery member has a suction portion that directly suctions the non-product portion in order to recover the non-product portion, the pressing portion and the suction portion are configured to contact mutually different portions on the same side of the non-product portion, and the glass sheet breaking apparatus is characterized in that a width of a first contact region in which the pressing portion contacts the non-product portion and a width of a second contact region in which the suction portion contacts the non-product portion overlap when viewed in a direction in which the score line extends.

2. The glass sheet breaking apparatus according to claim 1, characterized in that the holding member has a plurality of the pressing portions, and the recovery member has a plurality of the suction portions.

3. The glass sheet breaking apparatus according to claim 1 or 2, characterized in that, of the first contact region and the second contact region, a whole width of a region in which the width is relatively narrow is accommodated within a width of a region in which the width is relatively wide when viewed in the direction in which the score line extends.

4. The glass sheet breaking apparatus according to claim 1 or 2, characterized in that the first contact region and the second contact region are alternately arranged along the direction in which the score line extends.

5. A glass sheet manufacturing method comprising: a holding step of holding a glass sheet having a score line formed on one side along a boundary between a product portion and a non-product portion; a breaking step of pressing the glass sheet from the other side to apply a bending stress to a formed portion of the score line and break the glass sheet along the score line during the holding step; and a recovery step of recovering the non-product portion separated from the product portion by breaking after the breaking step, the non-product portion is directly pressed in order to hold the glass sheet in the holding step, the non-product portion is directly suctioned in order to recover the non-product portion in the recovery step, the non-product portion is pressed in the holding step and the non-product portion is suctioned in the recovery step at mutually different portions on the same side of the non-product portion, and the glass sheet manufacturing method is characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The width of the region in the non-product portion that is pressed in the holding process overlaps the width of the region in the non-product portion that is adsorbed in the recycling process when viewed in the direction extending from the scribe line.

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