JP2009172749A - End face grinding device for glass plate and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress effectively a grinding liquid from being splashed to the surface of a glass plate when its end face is subjected to grinding processing, and to recover the grinding liquid efficiently. <P>SOLUTION: A shielding plate 6 has a surrounding part 9 to surround a contacting part 4 from the center of the surface of a glass substrate 2 wherein one end of the surrounding part 9 extends crossing the end face 2a of the glass substrate 2 on the front side of the rotating direction of a grinder element 3. On the side opposite the grinder element 3 with the shielding plate 6 between, a purge nozzle 7 is installed. The purge nozzle 7 is provided in in-line arrangement with a plurality of nozzle apertures to jet purge water 13 in order to hinder the grinding liquid from intruding to the surface of the glass substrate 2 via the gap between the shielding plate 6 and the glass substrate 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a glass plate end surface grinding apparatus and method, and more specifically, a rotating grindstone is brought into contact with the end surface of the glass plate, and the grindstone and the glass plate are joined to the end surface of the glass plate while supplying a grinding liquid to the contact portion. It is related with the technique which grinds the end surface of a glass plate by making it move relatively in the longitudinal direction of.

  As is well known, when manufacturing various image display devices such as a liquid crystal display, a plasma display, an electroluminescence display, and a field emission display, a plurality of display elements are formed on a large glass substrate, and then each display element is partitioned. A so-called multi-chamfering method that divides every time has been adopted. For this reason, there is a current situation in which a glass substrate manufactured by a glass manufacturer or the like is being increased in size.

  These glass substrates can be obtained as glass substrate products by cutting the formed material glass into a rectangular shape and a predetermined size and then grinding the cut end surface.

  End grinding of this type of glass substrate is usually performed by moving the grindstone relative to the glass substrate in a direction along the end face while a rotating grindstone is in contact with the end face of the glass substrate. . At this time, in many cases, the grinding fluid is supplied to the grinding portion for the purpose of cooling the frictional portion or the contact portion (grinding portion) between the grindstone and the end surface of the glass substrate. However, the grinding fluid supplied to the grinding part is also scattered on the surface of the glass substrate due to the grinding fluid supply direction, the rotation of the grinding stone, etc., and the chips contained in the scattered grinding fluid are By adhering to the surface of a glass substrate, the surface property of a glass substrate may deteriorate or the subsequent washing | cleaning process may be complicated. Therefore, in this type of end surface grinding apparatus, the following countermeasures are taken.

For example, in Patent Document 1 below, a grindstone positioned vertically below the glass substrate on the surface on which the constituent elements of the plasma display panel are formed on the front and back surfaces of the glass substrate held substantially vertically and the constituent elements described above. In this state, the grindstone is brought into contact with the fractured surface to be ground, and while the liquid is supplied to the grindstone, the held glass substrate is moved in the longitudinal direction of the fractured surface. A method for grinding a cut section by rotating a grindstone is disclosed.
JP 2005-317235 A

  By the way, recently, various image display displays such as liquid crystal displays and plasma displays have been improved in definition, and accordingly, there is an increasing demand for higher definition of glass substrates for displays such as PDPs. . In order to meet such demands, it is necessary to make the surface properties of the glass substrate better. For this reason, it is important to prevent the grinding liquid supplied to the grinding part from splashing on the surface of the glass substrate. It becomes.

  Here, the shielding plate disclosed in Patent Document 1 has a flat shape, and is disposed in parallel to the end surface of the glass plate to be ground and a predetermined distance above. The grinding fluid supplied to the contact portion between the grindstone and the end surface of the glass plate is scattered obliquely upward from the contact portion and reaches the shielding plate with the rotation of the grindstone and the relative movement of the glass plate. And most of the grinding fluid that has reached the shielding plate flows along the shielding plate in a direction parallel to the end face of the glass plate, and flows down by its own weight at a position where the flow velocity is lowered, and falls below the glass plate. Therefore, in a region where the scattered grinding liquid reaches the shielding plate and flows in a direction parallel to the end face of the glass plate along the shielding plate, the grinding liquid passes through the gap between the shielding plate and the glass plate and the plane of the glass plate. Even if it is easy to enter the center side and the gas supply nozzle 23 as shown in FIG. 3 of the same document is provided, it is difficult to effectively suppress the penetration of the grinding liquid into the plane center side of the glass plate. . This tendency is particularly noticeable when the glass plate is processed in a horizontal posture. Further, this document does not particularly take into consideration the recovery of the grinding fluid supplied to the contact portion (grinding portion).

  In view of the above circumstances, in the present invention, in the edge grinding process of the glass plate, it is possible to effectively suppress the grinding fluid from scattering to the flat surface of the glass plate and to efficiently collect the grinding fluid. As an objective.

  The solution to the above problem is achieved by the glass plate grinding apparatus according to the present invention. That is, this glass plate grinding apparatus includes a grinding wheel that grinds the end surface by contacting the end surface of the glass plate while rotating, and a grinding fluid supply unit that supplies a grinding fluid to a contact portion between the grindstone and the end surface of the glass plate. In the glass plate end surface grinding apparatus comprising a shielding plate for shielding the flat surface of the glass plate from the grinding liquid supplied to the contact portion, the shielding plate surrounds the contact portion from the plane center side of the glass plate And one end of the surrounding portion is characterized by a point extending from the contact portion on the front side in the rotation direction of the grindstone so as to intersect with the end surface of the glass plate.

  According to such a configuration, after the grinding fluid supplied to the contact portion contributes to the processing at the contact portion, it reaches the surrounding portion surrounding the contact portion, and along the surrounding portion, the grindstone is more than the contact portion. It is induced | guided | derived to the position beyond the position which cross | intersects the end surface of a glass plate in the rotation direction front side. That is, on the front side in the rotation direction of the grindstone from the contact portion, the grinding liquid flows in a direction away from the plane center side of the glass plate along the surrounding portion, and is guided to a position exceeding the end surface of the glass plate. Thereby, it is effectively prevented that the grinding fluid scattered at the contact portion flows to the plane center side of the glass plate and adheres to the plane center side. In addition, since the grinding fluid is given flow direction by the surrounding portion, the grinding fluid can be efficiently recovered.

  In this case, the surrounding portion preferably has a curved shape along the outer peripheral surface of the grindstone in a plan view with respect to the plane of the glass plate.

  By making the surrounding part into the above-described shape, the grinding liquid that has reached the surrounding part can be smoothly guided along the rotation direction of the grindstone, and the above-described effects can be enhanced.

  Moreover, the surrounding part can also be set as the structure located in the both surfaces side besides the structure located in the one surface side of a glass plate.

  By disposing the shielding plate so that the surrounding portion is positioned on both sides of the glass plate, the above-described action by the surrounding portion can be obtained on both sides of the glass plate. Therefore, the glass plate obtained by the grinding apparatus can be widely provided as a glass substrate for various image display devices such as a high-definition liquid crystal display and a plasma display.

  Moreover, when it is set as the structure where an enclosure part is located in the both surfaces side of a glass plate, it is preferable that the enclosure part has a slit for inserting a part including the end surface of a glass plate.

  By setting it as such a shape, the surrounding part located in the both surfaces side of a glass plate can be comprised with one shielding board, and simplification of a structure can be aimed at.

  Further, in addition to the above configuration, a purge nozzle that injects a purge fluid may be disposed at a position opposite to the grindstone across the surrounding portion. In this case, the purge fluid is supplied to the gap between the surrounding portion and the glass plate.

  By adopting such a configuration, the grinding liquid that attempts to enter the plane center side of the glass plate through the gap between the surrounding portion and the glass plate is pushed back toward the grindstone by the purge fluid ejected from the purge nozzle. Therefore, it is possible to more effectively prevent the grinding liquid from adhering to the plane center side of the glass plate. Here, the “purge fluid” includes a liquid such as water and a gas such as air, but the grinding fluid which tries to enter the plane center side of the glass plate through the gap between the surrounding portion and the glass plate. From the viewpoint of applying a pressure sufficient to push back to the grindstone side, a liquid such as water is more preferable. The pressure may be appropriately set according to the supply amount of the grinding fluid.

  In this case, it is preferable that the installation angle of the purge nozzle is set so that the purge fluid reaches the glass plate through the gap between the surrounding portion and the glass plate.

  By determining the installation angle of the purge nozzle as described above, the grinding fluid can be pushed back by the purge fluid at a position closer to the grindstone than the gap between the shielding plate and the glass plate, and the grinding fluid passes through the gap on the plane of the glass plate. The situation of entering the center side can be more effectively prevented.

  Further, the purge nozzle can be arranged on one side of the glass plate as well as on the both sides thereof, like the surrounding portion of the shielding plate.

  By setting it as such a structure, the effect | action same as the effect | action by the said purge nozzle can be acquired on the both surfaces side of a glass plate.

  In this case, the shielding plate having the surrounding portion and the purge nozzle may be unitized.

  If unitized in this way, the unit can be removed while maintaining the positional relationship between the shielding plate and the purge nozzle even when the end face grinding device is disassembled for exchanging the grindstone. Therefore, it is only necessary to adjust the positional relationship between the grindstone and the unit at the time of reassembly after exchanging the grindstone, and the time required for exchanging the grindstone can be shortened.

  Of course, in addition to the shielding plate and the purge nozzle, the grinding fluid supply unit can be unitized. That is, the shielding plate, the grinding fluid supply unit, and the purge nozzle may be unitized.

  The end face grinding apparatus for a glass plate according to the above configuration further includes a housing for accommodating at least a grindstone and a grinding fluid supply unit, and the housing passes a part of the glass plate through a predetermined end face, It is preferable to have an opening for allowing the end face to contact the grindstone.

  By setting it as such a structure, a grindstone is covered with a housing except for the opening part used as the insertion side of a glass plate. Therefore, in combination with the above action by the shielding plate or the purge nozzle, it is possible to more reliably prevent the grinding liquid from scattering toward the center of the glass plate plane. Further, since the grindstone and the grinding fluid supply unit are covered with the housing, the grinding fluid guided in the direction away from the glass plate by the surrounding portion can be collected without leakage.

  The glass plate end surface grinding apparatus according to the above configuration is particularly suitable for processing a glass plate in a horizontal posture.

  On the other hand, the solution of the above problem is also achieved by the method for grinding an end face of a glass plate according to the present invention. That is, this glass plate grinding method is a method of grinding the end surface by contacting the end surface of the glass plate while rotating the grindstone, and supplying the grinding liquid to the contact portion between the grindstone and the end surface of the glass plate. In addition, in the method for grinding an end face of a glass plate in which the end face is ground in a state in which a shielding plate for shielding the flat surface of the glass plate from the grinding liquid supplied to the contact portion is provided, the shielding plate includes the contact portion of the glass plate. And an end portion of the surrounding portion is characterized in that it extends across the end surface on the front side in the rotational direction of the grindstone from the contact portion.

  According to such a method, the same matter as the above-described matter regarding the glass sheet grinding apparatus according to the present invention applies, and therefore, the same effect as the effect of the device can be obtained.

  Further, in this case, a purge nozzle for injecting a purge fluid is disposed at a position opposite to the grindstone across the surrounding portion, and the purge fluid is supplied to the gap between the shielding plate and the glass plate. It is preferable.

  Thus, also in the end surface grinding method described above, by disposing the purge nozzle of the above supply mode, the same matter as the purge nozzle in the above-described end surface grinding apparatus applies, and therefore the effect of the apparatus The same effect can be obtained.

  As described above, according to the glass plate grinding apparatus and method therefor according to the present invention, in the end face grinding process of the glass plate, it is possible to suppress as much as possible that the grinding water is scattered on the plane of the glass plate. Therefore, the surface property of the glass plate can be improved, and the display elements for various image display devices such as a liquid crystal display and a plasma display can be made high definition. Moreover, efficient collection | recovery of a grinding fluid can be aimed at.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  First, based on the top view shown in FIG. 1, the whole structure of the grinding device of the glass plate which concerns on one Embodiment of this invention is demonstrated. In the present embodiment, a case where the end surface of a glass substrate for a liquid crystal display is ground will be described as an example.

  As shown in the figure, the glass substrate end surface grinding apparatus 1 is an apparatus for grinding the end surface 2a (cut surface) of the glass substrate 2 cut out from the green glass after forming, and has a horizontal posture. Are arranged on one side (or both sides) of the glass substrate 2 conveyed in a predetermined direction. Here, the end surface grinding apparatus 1 includes a grindstone 3 that grinds the end surface 2a along one side in the conveyance direction of the glass substrate 2 with rotation, and a contact portion (grinding portion) 4 between the grindstone 3 and the glass substrate 2. As a reference, a grinding fluid that is disposed on the rear side in the rotational direction of the grindstone 3 (in the region on the right side of the contact portion 4 in FIG. 1) and supplies a grinding fluid (pure water here) toward the periphery of the contact portion 4. A supply nozzle 5, a shielding plate 6 and a purge nozzle 7 described later are provided. In the present embodiment, the above-described components (the grindstone 3, the grinding fluid supply nozzle 5, the shielding plate 6, and the purge nozzle 7) are accommodated in a substantially rectangular housing 8 and provided on one end face of the housing 8. The opening 8 a is configured such that a part of the glass substrate 2 can be inserted into the housing 8 and the end surface 2 a related to a part of the inserted glass substrate 2 can be brought into contact with the outer peripheral surface of the grindstone 3.

  The grindstone 3 is configured to rotate around an axis parallel to an axis orthogonal to the plane of the glass substrate 2, and the rotation direction of the grindstone (contact portion 4) of the glass substrate 2 is to transport the glass substrate 2. The direction is opposite to the direction (counterclockwise direction in FIG. 1). As shown in FIG. 4, for example, the outer peripheral surface 3a of the grindstone 3 serving as a grinding surface has a substantially concave arc-shaped cross-sectional contour so that both edges of the end surface 2a of the glass substrate 2 can be rounded at a time. It is configured.

  The grinding fluid supply nozzle 5 is configured to supply the grinding fluid toward the contact portion 4 from the rear side in the rotation direction of the grinding stone 3 with reference to the contact portion 4 between the glass substrate 2 and the grinding stone 3.

  As shown in FIG. 2, the shielding plate 6 has a portion formed in a curved shape along the longitudinal direction, for example, a substantially arc shape (including an arc shape). It becomes the surrounding part 9 which surrounds the circumference | surroundings of the glass substrate 2 side of the grindstone 3 containing. Specifically, the surrounding portion 9 has a substantially arc shape along the outer peripheral surface 3a of the grindstone 3 as shown in FIG. 1 in a state where the plane of the glass substrate 2 is viewed in plan view, and is along the longitudinal direction thereof. And a slit 10 having a constant width dimension. Then, in a state in which a part of the glass substrate 2 is inserted into the slit 10 and the end surface 2a of the insertion portion is in contact with the grindstone 3, the surrounding portion 9 is more glass substrate 2 than the contact portion 4 as shown in FIG. It is arrange | positioned in the position of the plane center side. Further, one end of the surrounding portion 9 extends so as to intersect with the end surface 2a of the glass substrate 2 on the front side in the rotation direction of the grindstone 3 with respect to the contact portion 4 (a region on the left side of the contact portion 4 in FIG. 1). A shielding plate 6 is fixed to the housing 8. The surrounding portion 9 having the above-described configuration is disposed on both the front and back plane sides of the glass substrate 2. In addition, regarding the width dimension of the slit 10, it is necessary to have at least a size that allows the glass substrate 2 to be inserted as described above. If possible, the flutter of the glass substrate 2 during grinding (amplitude in the plate thickness direction) is taken into consideration. It is preferable to set the width dimension.

  In the present embodiment, as shown in FIG. 3, the purge nozzle 7 is configured as a nozzle unit formed by integrating a plurality of nozzle openings 11, and is located at a position opposite to the grindstone 3 with the shielding plate 6 interposed therebetween. It is arranged. Here, similarly to the shielding plate 6, the purge nozzle 7 has a slit for inserting the glass substrate 2, and a pair of inclined surfaces 12, 12 facing each other with the slit interposed therebetween is provided with each of the inclined surfaces 12, 12. A plurality of nozzle openings 11 are arranged in a line along the longitudinal direction. Further, these nozzle openings 11 are arranged so as to be uniformly oriented in the same direction. Therefore, when a part of the glass substrate 2 is inserted between the slopes 12 and 12 (slits) of the purge nozzle 7 and the end surface 2a is in contact with the grindstone 3, the purge water sprayed from the plurality of nozzle openings 11 is used. (For example, pure water) 13 forms a curtain-like water wall between the plurality of nozzle openings 11 and the plane of the glass substrate 2. The width dimension of the slit provided in the purge nozzle 7 should be set in accordance with the thickness of the glass substrate 2 to be inserted, and preferably the glass substrate at the time of grinding, like the slit 10 of the shielding plate 6. It is desirable to set the degree of flutter of 2 in consideration.

Here, the directing mode in the vertical direction of the purge water 13 discharged from the purge nozzle 7 will be described in detail. As shown in FIG. 5, each nozzle opening 11 has the purge water 13 injected from the nozzle opening 11. The glass substrate 2 and the shielding plate 6 in contact with the grindstone 3 are directed to be supplied to the gap. Here, preferably, the incident angle θ _{1 of} the purge water 13 sprayed from the nozzle opening 11 with respect to the plane of the glass substrate 2 is 10 degrees or more and 45 degrees or less, and more preferably, the incident angle θ ₁ is 25. The attachment angle of the purge nozzle 7 or the formation angle of the nozzle opening 11 is set so that the angle is 35 degrees or more and 35 degrees or less. This is because the closer the landing point of the purge water 13 to the plane of the glass substrate 2 is to the grindstone 3 side, the higher the action of pushing back the grinding fluid. This is based on the reason that the vertical gap between the substrate 2 and the purge nozzle 7) should be as large as possible. Conversely, for the reasons described above, the nozzle opening 11 of the purge nozzle 7 is installed so that the purge water 13 reaches the plane of the glass substrate 2 through the gap between the surrounding portion 9 and the glass substrate 2. It is preferable that an angle is set.

Further, the directing mode of the purge water 13 in a state where the plane of the glass substrate 2 is viewed in plan will be described in detail. As shown in FIG. 6, each nozzle opening portion 11 is purged water 13 ejected from the nozzle opening portion 11. Is oriented so as to cross the unground portion of the end surface 2a of the glass substrate 2 in contact with the grindstone 3 obliquely toward the grindstone 3. In other words, the angle θ ₂ formed by the ejection direction of the purge water 13 ejected from the nozzle opening 11 and the tangential direction V at the contact portion 4 of the grindstone 3 (the front side in the rotational direction, see FIG. 6) is 90 degrees. The directivity angle of the nozzle opening 11 is set so as to be more than 180 degrees.

  Hereinafter, a glass substrate grinding method using the apparatus having the above-described configuration will be described with reference to FIGS. 7 is a plan view of a main part for explaining the action focusing on the action of the shielding plate 6, and FIG. 8 is a main part for explaining the action focusing on the action of the purge nozzle 7. A plan view is shown.

  First, the operation of the shielding plate 6 will be described. As shown in FIG. 7, at the time of grinding, the grinding liquid (indicated by a thick arrow in the figure) supplied toward the vicinity of the contact portion 4 reaches the contact portion 4 and then around it. Scattered towards. At this time, since the contact portion 4 is surrounded by the surrounding portion 9 provided on the shielding plate 6, the grinding fluid scattered around the contact portion 4 is more along the surrounding portion 9 than the contact portion 4. Is guided to a position exceeding the crossing position with the end surface 2a of the glass substrate 2 on the front side in the rotation direction. That is, on the front side in the rotation direction of the grindstone 3 from the contact portion 4, the grinding fluid flows in a direction away from the plane center side of the glass substrate 2 along the surrounding portion 9 and is guided to a position exceeding the end surface 2 a of the glass substrate 2. The Thereby, it is effectively prevented that the grinding fluid scattered at the contact portion 4 flows to the plane center side of the glass substrate 2 and adheres to the plane center side. In addition, since the grinding fluid is given flow direction by the surrounding portion 9, the grinding fluid is efficiently recovered.

  Moreover, if the surrounding part 9 is formed in the substantially circular arc shape along the outer peripheral surface 3a of the grindstone 3 like this embodiment, the grinding fluid which reached the surrounding part 9 will be smoothly along the rotation direction of the grindstone 3. The above effects can be enhanced. Further, by adopting such a shape, in a state where the glass substrate 2 is viewed in plan, a flow path having a substantially constant radial distance is formed between the surrounding portion 9 and the grindstone 3, and this also causes the grinding liquid to flow. Sending is performed smoothly.

  Next, the operation of the purge nozzle 7 will be described. As shown in FIG. 8, the purge water 13 injected from the purge nozzle 7 (nozzle opening thereof) is seen from the contact portion 4 from the oblique front side and the shielding plate 6 and the glass. It is supplied to the gap with the substrate 2. Therefore, the grinding fluid that tries to enter the plane of the glass substrate 2 through the gap between the surrounding portion 9 and the glass substrate 2 is pushed back toward the grindstone 3 by the purge water 13. In addition, the grinding fluid scattered from the contact portion 4 to the front side in the rotation direction of the grindstone 3 is weakened in the direction of the scattering direction, and is changed in the scattering direction (flow direction) to be guided away from the glass substrate 2. . In addition, it acts to push the grinding liquid guided in the direction away from the glass substrate 2 by the surrounding portion 9 in the direction of promoting the guidance by the surrounding portion 9. As described above, the grinding liquid is prevented from entering the center of the plane of the glass substrate 2 through the gap between the shielding plate 6 and the glass substrate 2, and the grinding liquid is passed through the gap between the shielding plate 6 and the glass substrate 2. It is possible to prevent leakage to the outside.

  Further, as in the present embodiment, by providing the housing 8 that accommodates the grindstone 3 and the grinding fluid supply nozzle 5, the grindstone 3 is covered with the housing 8 except for the opening 8 a that is the insertion side of the glass substrate 2. Accordingly, the shielding action by the shielding plate 6 and the purging action (discharge action) by the purge nozzle 7 synergistically interact with each other, and not only the leakage of the grinding liquid to the plane center side of the glass substrate 2 but also the housing 8. Leakage of the grinding fluid to the outside is prevented as much as possible. Further, the grinding liquid that has escaped in the direction away from the glass substrate 2 by the surrounding portion 9 can be collected without leakage. As a result, for example, the possibility of minute glass particles or abrasive grain residues that are difficult to detect in the inspection process after the grinding process remaining on the flat surface of the glass plate as close to zero as possible is achieved. High definition can be achieved.

  As mentioned above, although one Embodiment of this invention was described, it cannot be overemphasized that the end surface grinding apparatus or method of the glass plate which concerns on this invention can be changed arbitrarily within the scope of the present invention.

  For example, in the above-described embodiment, the shape of the surrounding portion 9 is partially curved in a substantially arc shape, but is not particularly limited thereto. As long as it has a function as the surrounding part 9, the shape is arbitrary. For example, although illustration is omitted, the surrounding portion 9 may have a curved shape other than an arc shape, or may partially include a flat surface. Or not only the shape along the said longitudinal direction but the shape which curves along the direction (thickness direction of the glass substrate 2) orthogonal to this may be made.

  Further, regarding the arrangement mode of the nozzle openings 11 formed in the purge nozzle 7, it is not necessary that all the nozzle openings 11 are arranged on the glass substrate 2, and some of the plurality of nozzle openings 11 arranged in parallel are arranged. The glass substrate 2 may be disposed on the grindstone 3 side with the end surface 2a as a boundary. Moreover, in the said embodiment, although the several nozzle opening part 11 was arrange | positioned in 1 row on the both surfaces side of the glass substrate 2, it is also possible to make it 2 or more rows. The shape of the nozzle opening 11 is not limited to the round hole shape, and may be a slit shape, for example.

  Moreover, in the said embodiment, it is also possible to take the structure which formed separately the shield plate 6 and the purge nozzle 7 which were formed separately and arrange | positioned. In this case, although not shown in the figure, the corners on the grindstone 3 side of the slit 10 provided in the shielding plate 6 are chamfered, and a plurality of nozzle openings 11 shown in FIG. 3 are chamfered along the slit longitudinal direction, for example. A configuration in which these are arranged in parallel is an example of the integration (unitization). According to such a configuration, the attachment parts to the housing 8 can be integrated into one part, so that the attachment accuracy to the housing 8 is improved. Of course, the shielding plate 6 and the purge nozzle 7 can be integrated with the housing 8, respectively.

  Here, FIG. 9 shows another configuration example of the unitization, and specifically shows a perspective view of the grinding fluid scattering prevention unit 20 in which the shielding plate, the grinding fluid supply nozzle, and the purge nozzle are unitized. . FIG. 10 is a plan view of the main part of an end surface grinding apparatus in which the grinding fluid scattering prevention unit 20 is incorporated. The grinding fluid scattering prevention unit 20 is formed in a substantially box shape integrally including the shielding plate 6 shown in FIG. 2, and a surrounding portion 9 ′ provided on a side surface thereof is vertically divided by a slit 10 ′. Eggplant. And like the said embodiment, in the state which penetrated a part of glass substrate 2 to this slit 10 ', and contacted the end surface 2a of the penetration part with the grindstone 3, as shown in FIG. The grinding fluid scattering prevention unit 20 has one end extending so as to intersect with the end surface 2a of the glass substrate 2 on the front side in the rotation direction of the grindstone 3 with respect to the contact portion 4 (a region on the left side of the contact portion 4 in FIG. 10). Is fixed to the housing 8 having the shape shown in FIG. Further, a plurality of nozzle openings 11 ′ are arranged on the opposite side of the surrounding portion 9 ′ from the grindstone 3 (see FIG. 10), and purge water is directed toward the plane of the glass substrate 2 during grinding. It is arrange | positioned in the grinding fluid scattering prevention unit 20 so that 13 can be injected. In the illustrated example, the grinding fluid supply nozzle 5 ′ is integrally disposed on the upper portion of the grinding fluid scattering prevention unit 20, but instead, the grinding fluid supply nozzle 5 ′ can be disposed on the lower portion. Alternatively, it can be arranged on both the upper part and the lower part.

  With this configuration, when the grindstone 3 is replaced, it is possible to replace the grindstone 3 only by detaching the grinding fluid scattering prevention unit 20. In addition, since it is not necessary to readjust the positional relationship among the grinding fluid supply nozzle 5 ′, the surrounding portion 9 ′, and the nozzle opening 11 ′ of the purge nozzle, the time required for exchanging the grindstone 3 is shortened.

  Moreover, although the case where the shielding board 6 and the purge nozzle 7 (nozzle opening part 11) are arrange | positioned on the upper and lower both surfaces side of the glass substrate 2 was illustrated in the said embodiment, it is not necessary to necessarily arrange | position on both surfaces side, for example, the glass substrate 2 One or both of the shielding plate 6 and the purge nozzle 7 may be disposed only on the upper surface side. At this time, it is also possible to adopt a configuration in which both components 9 and 7 are unitized so that the shielding plate 6 (enclosure 9) and the purge nozzle 7 are arranged only on one side of the glass substrate 2. .

  Moreover, although the end surface grinding apparatus 1 of the glass substrate which concerns on the above description is arrange | positioned at the both sides of the glass substrate 2, when grinding all the end surfaces which concern on the 4 sides of the glass substrate 2 cut out from the base plate glass For example, a configuration in which two end grinding devices 1 are arranged opposite to each other in a direction orthogonal to the transport direction at a position on the relatively upstream side and a position on the downstream side of the transport line of the glass substrate 2. It is also possible to take. Further, the end face grinding apparatus 1 can be configured to be movable in a direction orthogonal to the transport direction so that the same end face grinding apparatus 1 can cope with a size change of the glass substrate 2 or the like. Alternatively, only specific components such as the grindstone 3 can be configured to be relatively movable in the conveyance orthogonal direction within the housing 8.

  In addition, although illustration is abbreviate | omitted here, the conveyance means may be comprised by conveyance means, such as a belt conveyor. Further, at this time, the glass substrate 2 may be configured to be fixed at a predetermined position of an element (for example, a belt) constituting the conveying means by vacuum suction or the like. Of course, as long as the relative movement between the glass substrate 2 and the grindstone 3 is performed, the configuration thereof is arbitrary. For example, the glass substrate 2 is fixed, and the end face grinding apparatus 1 for the glass plate including the grindstone 3 is used as the glass substrate. It is also possible to configure so as to be movable along the two arrangement directions.

  As described above, the case where the present invention is applied to a grinding process of a glass substrate for a liquid crystal display has been described as an example. However, the glass plate grinding apparatus and method according to the present invention include a glass substrate for a liquid crystal display, High surface accuracy is required, such as glass substrates for various image display devices such as plasma displays, electroluminescence displays, field emission displays, and glass substrates used as substrates for forming various electronic display functional elements and thin films. It can also be suitably used when grinding the end face of the glass plate to be used.

It is a top view of the grinding device of the glass substrate concerning one embodiment of the present invention. It is a perspective view of the shielding board which comprises the grinding device of a glass substrate. It is a principal part perspective view of the purge nozzle which comprises the grinding device of a glass substrate. It is principal part AA sectional drawing of the grinding device of the glass substrate shown in FIG. It is a principal part expanded sectional view of the grinding device explaining the directivity aspect in the perpendicular direction of a purge nozzle. It is a principal part enlarged plan view of a grinding device explaining the directing mode of a purge nozzle in the state where planarly viewed a glass substrate. It is a principal part top view of the grinding device for demonstrating the effect | action by a shielding board. It is a principal part top view of the grinding device for demonstrating the effect | action by a purge nozzle. It is a perspective view of the grinding fluid scattering prevention unit which has a shielding board, the grinding fluid supply nozzle, and the purge nozzle integrally. It is a principal part top view of the end surface grinding apparatus which has a grinding fluid scattering prevention unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grinding device 2 Glass substrate 3 Grinding wheel 4 Contact part 5 Grinding liquid supply nozzle 6 Shielding plate 7 Purge nozzle 9 Enclosing part 10 Slit 11 Nozzle opening 13 Purge water θ1 Incident angle θ2 The jet direction of purge water and the tangential direction of the end surface Corner

Claims (12)

A grindstone that grinds the end surface by contacting the end surface of the glass plate while rotating, a grinding fluid supply unit that supplies a grinding fluid to a contact portion between the grindstone and the end surface of the glass plate, and is supplied to the contact portion In the glass plate end surface grinding device comprising a shielding plate for shielding the flat surface of the glass plate from the ground grinding liquid,
The shielding plate includes an enclosing portion that surrounds the contact portion from the plane center side of the glass plate, and one end of the enclosing portion is an end surface of the glass plate on the front side in the rotation direction of the grindstone with respect to the contact portion. An end surface grinding apparatus for a glass plate, characterized in that the glass plate end surface is extended.   The said surrounding part is an end surface grinding apparatus of the glass plate of Claim 1 which has the curved shape along the outer peripheral surface of the said grindstone by planar view with respect to the plane of the said glass plate.   The said surrounding part is an end surface grinding apparatus of the glass plate of Claim 1 or 2 located in the both surfaces side of the said glass plate.   The said surrounding part is an end surface grinding apparatus of the glass plate of Claim 3 which has a slit for inserting a part including the said end surface of the said glass plate.   A purge nozzle for injecting a purge fluid is disposed at a position opposite to the grindstone across the surrounding portion, and the purge fluid is configured to be supplied to a gap between the shielding plate and the glass plate. The glass sheet end surface grinding apparatus according to any one of claims 1 to 4.   6. The glass plate end surface grinding according to claim 5, wherein the purge nozzle is set so that the purge fluid reaches the glass plate through a gap between the surrounding portion and the glass plate. apparatus.   The glass plate end face grinding device according to claim 5, wherein the purge nozzles are respectively disposed on both sides of the glass plate.   The housing further includes at least the grindstone and the grinding fluid supply unit, and the housing is capable of inserting a part of the glass plate into a predetermined end surface and allowing the end surface of the glass plate to contact the grindstone. The end surface grinding apparatus of the glass plate of any one of Claim 1 to 7 which has the opening part for performing.   The end face grinding device for a glass plate according to any one of claims 1 to 8, wherein the glass plate is processed so as to be in a horizontal posture.   The glass plate end face grinding device according to claim 5, wherein the shielding plate having the surrounding portion and the purge nozzle are unitized. A method of grinding the end face by contacting the end face of the glass plate while rotating the grindstone, supplying a grinding liquid to a contact portion between the grindstone and the end face of the glass plate, and supplying the contact portion to the contact portion In the end surface grinding method of the glass plate for grinding the end surface in a state where a shielding plate for shielding the flat surface of the glass plate is disposed from the supplied grinding liquid,
The shielding plate has an enclosing portion that surrounds the contact portion from the plane center side of the glass plate, and one end of the enclosing portion intersects the end surface on the front side in the rotation direction of the grindstone from the contact portion. A method for grinding an end face of a glass plate, characterized by being extended.   A purge nozzle for injecting a purge fluid is disposed at a position opposite to the grindstone across the surrounding portion, and the purge fluid is configured to be supplied to a gap between the shielding plate and the glass plate. The method for grinding an end face of a glass plate according to claim 11.

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