JP2019099330A - Manufacturing method for glass plate and transport device for glass plate - Google Patents

Abstract

To provide a manufacturing method for a glass plate adapted to increase the speed for a transport process of taking out glass plates one by one from a laminate and transporting the same.SOLUTION: A manufacturing method for a glass plate comprises a transport process of taking out glass plates G one by one from a laminate L including the plurality of glass plates G and transporting the same. The transport process comprises: a suction step of sucking the glass plates G by a suction pad 31 and separating at least part of the glass plates G from the laminate L; and a clamp step of clamping a portion of the glass plates G separated from the laminate L by a chuck 32.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a method of manufacturing a glass sheet including a glass sheet conveying step, and a glass sheet conveying apparatus.

  In the glass plate manufacturing process, it is customary that transfer, storage, etc. are carried out in a state in which a laminated body in which glass plates and protective sheets are alternately stacked vertically or horizontally is accommodated in a container such as a pallet or the like. .

  In this case, at a predetermined timing, a conveying step of taking out and conveying the glass plates one by one from the laminated body is performed. In the transport step, the front surface side of the glass plate is adsorbed by a suction pad and taken out from the laminate, and then the glass plate is transported as it is by a suction pad to a post-process (see, for example, Patent Document 1).

JP 7-10301 A

  However, as disclosed in Patent Document 1, when the glass plate taken out of the laminate is transported by the suction pad, there is a problem that it is difficult to transport the glass plate at high speed because the holding power of the glass plate is not sufficient. . Particularly, in the case of a glass plate used as a substrate for a liquid crystal display, an organic EL display, a solar cell, etc., the suction area of the suction pad is limited to the surface peripheral portion excluding the surface central portion of the glass plate requiring high quality. It is often difficult to increase the holding power of the glass plate.

  This invention makes it a subject to aim at speeding-up of the conveyance process which takes out a glass plate one by one from a laminated body, and conveys it.

  The present invention devised to solve the above problems is a method of manufacturing a glass sheet comprising a conveying step of taking out and conveying a glass sheet one by one from a laminate including a plurality of glass sheets, the conveying step comprising Providing a suction step of sucking the glass plate with a suction pad and pulling at least a part of the glass plate away from the laminate, and a holding step of pinching a portion of the glass plate pulled away from the laminate of the glass plate with a chuck. It features. According to such a configuration, the glass plate contained in the laminate is held by the chuck after being held in a state where the chuck can hold the chuck. Since the chuck sandwiches the glass plate from both the front and back sides, the holding force of the glass plate by the chuck is very high. Therefore, the glass plate can be transported at high speed if it is in a state of being held by the chuck.

  In the above configuration, the suction pad and the chuck are preferably attached to a single moving body. In this way, the respective positions of the suction pad and the chuck can be determined based on the common moving body. Therefore, the positioning accuracy of the suction pad and the chuck is improved.

  In the above configuration, in the suction step, the glass plate is moved to the standby position of the chuck with the suction pad in a state where the chuck stands by at a position where the glass plate can be held. It is preferable to hold the plate. In this way, the glass plate can be held by the chuck only by moving the suction pad. Therefore, in order to clamp a glass plate with a chuck, it is more efficient than the structure which moves both a suction pad and a chuck.

  In the above configuration, it is preferable that the opening and closing of the chuck and the movement of the suction pad in the suction step be performed using an air cylinder or a hydraulic cylinder. In this way, wiring and maintenance become easier as compared to the case where the opening and closing of the chuck and the movement of the suction pad are performed using an electric cylinder having a servomotor. Here, cylinders of the same type (for example, air cylinders) may be used for both opening and closing of the chuck and movement of the suction pad, or cylinders of different types (one for the air cylinder and the other for the hydraulic cylinder) may be used.

  In the above-described configuration, it is preferable that the glass plate is vertically stacked in the state of the laminate, and the chuck transports the glass plate in the vertical posture. In this way, the chuck can support and transport the glass plate without greatly changing the posture of the glass plate taken out of the laminate. Moreover, in the vertical position, there is also an advantage that it is easy to stabilize the position of the glass plate held by the chuck.

  In the above configuration, it is preferable to separate the upper end of the glass plate from the laminate while keeping the lower end of the glass plate grounded. In this way, the position of the upper end of the glass plate can be determined based on the lower end of the grounded glass plate. Therefore, the positioning accuracy of the upper end portion of the glass plate is improved, and the chuck can reliably hold it.

  The present invention invented to solve the above problems is a glass plate conveying apparatus for taking out a glass plate one by one from a laminate including a plurality of glass plates and conveying the glass plate, and A suction pad for pulling at least a part of the plate away from the stack, and a chuck for holding a portion of the glass plate pulled from the stack. According to such a configuration, it is possible to obtain the same effect as the corresponding configuration already described.

  According to the present invention as described above, it is possible to increase the speed of the transport process of taking out and transport the glass plates one by one from the laminate.

It is a front view which shows the production | generation process included in the manufacturing method of a glass plate. It is a side view which shows the inducing process included in the manufacturing method of a glass plate. It is a front view which shows the production | generation process included in the manufacturing method of a glass plate. It is a top view which expands and shows a part of causing process contained in the manufacturing method of a glass plate. It is a front view which expands and shows a part of crucible formation process included in the manufacturing method of a glass plate. It is a front view which shows the weir formation process included in the manufacturing method of a glass plate. It is a side view which expands and shows a part of crucible formation process included in the manufacturing method of a glass plate. It is a front view which shows the isolation | separation process included in the manufacturing method of a glass plate. It is a front view which shows the isolation | separation process included in the manufacturing method of a glass plate. It is a front view which expands and shows a part of separation process included in the manufacturing method of a glass plate. It is a side view which shows the separation process included in the manufacturing method of a glass plate. It is a side view which shows the separation process included in the manufacturing method of a glass plate. It is a side view which shows the separation process included in the manufacturing method of a glass plate. It is a side view which shows the separation process included in the manufacturing method of a glass plate. It is a front view showing the modification of the cause process included in the manufacturing method of a glass plate. It is a side view which shows the modification of the raising process included in the manufacturing method of a glass plate. It is a side view which shows the modification of the isolation | separation process included in the manufacturing method of a glass plate. It is a side view which shows the modification of the isolation | separation process included in the manufacturing method of a glass plate. It is a side view which shows the modification of the isolation | separation process included in the manufacturing method of a glass plate.

  Hereinafter, an embodiment of a manufacturing method of a glass plate and a conveyance device of a glass plate will be described based on a drawing. Note that XYZ in the figure is an orthogonal coordinate system. The X direction and the Y direction are horizontal directions, and the Z direction is a vertical direction.

  As shown in FIG.1 and FIG.2, the manufacturing method of the glass plate which concerns on this embodiment is one glass plate G from the pallet P which accommodated the laminated body L which laminated | stacked the glass plate G and the protection sheet S alternately. It has a glass plate extraction process of taking out each one.

  In the present embodiment, the laminate L is formed by alternately stacking a rectangular glass plate G and a rectangular protective sheet S in a vertical arrangement. The pallet P accommodating the laminate L stands on a bottom support Pa for supporting the bottom of the laminate L (the surface formed by the lower end of the glass plate G and the lower end of the protective sheet S) and the bottom support Pa. And a back support Pb for supporting the back of the multilayer body L. The back surface support portion Pb is configured to support the back surface of the multilayer body L such that the upper end portion Ga of the glass plate G is inclined rearward from the lower end portion Gb. The X direction is referred to as the width direction, and in the Y direction, the back support Pb side may be referred to as the rear, and the side opposite to the back support Pb may be referred to as the front. Moreover, the bottom surface of the laminated body L may be formed only by the lower end part of the glass plate G.

  The glass plate G is preferably inclined at an angle of 45 ° to 88 ° with respect to the horizontal surface in a state of being accommodated in the pallet P, and more preferably at an inclined attitude of 75 ° to 88 ° with respect to the horizontal surface . The thickness of the glass plate G is preferably 1.1 to 3.2 mm, more preferably 1.8 to 2.8 mm. As for the magnitude | size of glass plate G, it is preferable that one side is 900-2100 mm, and it is more preferable that one side is 1100-1400 mm. The glass sheet G is formed by the float method in this embodiment, but formed by another forming method such as the down draw method (for example, the overflow down draw method, the slot down draw method, the redraw method) It may be

  The protective sheet S is formed of, for example, a resin sheet such as an interleaf or a foamed resin, and the protective sheet S of the present embodiment is formed of glass interleaf. The protective sheet S is larger than the glass plate G, and protrudes from the side ends on both sides in the width direction of the glass plate G in a state of being accommodated in the pallet P. It is preferable that the protrusion width X1 of the protrusion part Sa of the protective sheet S is 50-150 mm, for example. In the present embodiment, the protective sheet S does not protrude from the upper end portion and the lower end portion of the glass plate G, but may protrude from the upper end portion and / or the lower end portion of the glass plate G. In the case of adsorbing the protruding part Sa of the protective sheet S, the protective sheet S should be made of a material that is difficult to allow air to pass so that only one protective sheet S on the back of the frontmost glass plate G can be adsorbed. preferable.

  The glass plate removal step includes a raising step, a crucible forming step, and a separation step (including a transfer step of the glass plate). In the present embodiment, each of these steps is automatically performed by the glass sheet take-out device. The glass plate taking-out device includes a glass plate holding device 1 (see FIGS. 1 to 9), a protective sheet holding device 2 (see FIGS. 1 to 9), and a conveying device 3 (see FIGS. 10 to 14). And have. Here, the conveying device 3 is a glass plate conveying device according to the present embodiment.

  Hereinafter, while explaining each process in a glass plate extraction process, each apparatus which comprises a glass plate extraction apparatus is also demonstrated.

<Cause process>
As shown in FIGS. 1 to 4, the inducing step is a step of causing at least a part of the end of the foremost glass plate G from the protective sheet S on the back thereof. Here, the back protective sheet S means a single protective sheet in direct contact with the foremost glass plate G.

  When causing the side end Gc among the ends of the foremost glass plate G, the entire side end Gc may be caused, but in the present embodiment, the force required for causing the foremost glass plate G is In order to make it smaller, only a part of the side end Gc is caused. In the case of causing only a part of the side end Gc, it is preferable that the position causing the foremost glass plate G be the upper part or the lower part of the side end Gc in consideration of the bendability of the glass plate G or the like. However, in the state in which the glass sheet G is placed vertically on the pallet P, if the lower end of the side end Gc is caused, there is a possibility that the bottom support portion Pa may be interfered. There is. The position at which the foremost glass plate G is caused may be the central portion in the vertical direction of the side end portion Gc.

  In the inducing step, the glass plate holding device 1 is mainly used. However, in the present embodiment, a case where the protective sheet holding device 2 is additionally used in addition to the glass plate holding device 1 will be described.

  As shown in FIG.1 and FIG.2, the glass plate holding | maintenance apparatus 1 is equipped with the 1st adsorption | suction pad 11 which adsorb | sucks the upper part of one side edge part Gc of glass plate G of the foremost surface from the front side. The protective sheet holding device 2 is provided with a second suction pad 21 that sucks the upper part of the protruding part Sa of the protective sheet S on the back surface of the frontmost glass plate G on the side of the first suction pad 11 from the front side. ing. The first suction pad 11 and the second suction pad 21 are movable along three directions of the XYZ directions. The first suction pad 11 may be movable only along the Y direction. These movements are realized by, for example, a manipulator. Or, it is realized by combining a plurality of feed mechanisms.

  As shown in FIG. 3 and FIG. 4, in the raising step, the first suction pad 11 of the glass plate holding device 1 is an upper portion of the side end portion Gc on one side of the foremost glass plate G (preferably the glass plate G It moves to the front side in a state where the upper corner Gd) where the side end Gc and the upper end Ga intersect is adsorbed. As a result, the upper portion of the side end portion Gc of the foremost glass plate G is caused from the back protection sheet S, and a gap C is formed between the foremost glass plate G and the back protection sheet S. In the present embodiment, the gap C is formed in the upper corner portion Gd of the glass plate G and the vicinity thereof. A portion corresponding to the gap C is a portion where the glass sheet G and the protective sheet S have been peeled, and a peeling boundary line Ca is formed at the boundary between the unpeeled portion. In FIGS. 3 and 5, the portions corresponding to the formation range of the gap C are hatched.

  When raising the foremost glass plate G with the first adsorption pad 11, the second adsorption pad 21 of the protective sheet holding device 2 so that the protective sheet S on the back side is not stuck to the foremost glass plate G and pulled up together. Preferably, the back protective sheet S is pressed. Instead of pressing the rear protective sheet S with the second suction pad 21, a dedicated pressing means for pressing the rear protective sheet S may be provided. In addition, the protection sheet S on the back may not be pressed.

  The amount X2 of the leading glass plate G can be adjusted according to the thickness and size of the glass plate G, but is preferably 50 to 250 mm, for example. The inducing amount X2 means the height difference between the position before inducing the attracted portion of the surface of the glass plate G and the position after inducing.

  Here, as shown in FIG. 4, in a state where the glass plate G is caused by the first suction pad 11 to form the gap C, a gas such as air or clean dry air may be jetted into the gap C by a nozzle or the like. In this way, gas can enter between the glass plate G and the protective sheet S, and the formation area of the gap C can be expanded.

<皺 forming process>
As shown in FIG. 5 to FIG. 7, in the wrinkle forming step, the protruding portion Sa of the protective sheet S on the back surface protruding from the edge of the induced front glass plate G is displayed on the front glass plate G Forming a weir W on the back protective sheet S. The glass plate holding | maintenance apparatus 1 and the protective sheet holding | maintenance apparatus 2 are used at a wrinkles formation process.

  As shown in FIG. 5, in the crucible forming step, the first suction pad 11 of the glass plate holding device 1 raises the top of the side end portion Gc of the glass plate G in the foremost position. The second suction pad 21 moves downward (a direction) while suctioning the protruding portion Sa of the back protection sheet S. In this process, the upper end portion or the like of the back protective sheet S enters the gap C, so that the gap C is spread and the formation range of the gap C is expanded. Here, the moving direction of the second suction pad 21 is a direction along the surface of the foremost glass plate G, that is, a direction along the support surface of the back surface support portion Pb (see a direction in FIG. 7). preferable.

  Then, as shown in FIG. 6, when the second suction pad 21 is moved further downward, the protective sheet S on the back surface is gathered downward while further expanding the formation range of the gap C. As a result, a plurality of creases W are formed on the back protective sheet S. For example, many ridges W extend in the width direction. As shown in FIG. 7, when a wrinkle W is formed on the back surface protection sheet S, the back surface protection sheet S is in a waved state, so that the foremost glass plate G and the back surface protection sheet S The contact area is reduced, and the adhesion between the two is significantly reduced.

  Here, as shown in FIG. 7, in the present embodiment, when moving the second suction pad 21 downward, the second suction pad 21 is the surface of the foremost glass plate G, that is, the back support portion Pb. It reciprocates in the b direction perpendicular to the support surface. Therefore, the second suction pad 21 moves downward along a movement trajectory T such as a sinusoidal curve, for example. In this way, the protruding portion Sa of the back protective sheet S swings in the direction perpendicular to the surface of the foremost glass plate G. As a result, air can easily enter from the outside between the foremost glass plate G and the back protective sheet S, and the adhesion between the two can be further alleviated. Here, the direction of the reciprocation of the second suction pad 21 is not limited to the b direction, and may be a direction having a component perpendicular to the surface of the foremost glass plate G. Of course, the second suction pad 21 does not have to be reciprocated as described above.

<Separation process>
The separation step is a step of separating the back protective sheet S on which the weir W is formed and the front glass plate G. In the separation step, the protective sheet holding device 2 and the conveying device 3 are used.

  As shown in FIG. 8, the transport device 3 includes a third suction pad 31 that sucks the upper end portion Ga of the foremost glass plate G from the front side.

  In the separation step, first, the suction by the first suction pad 11 of the glass plate holding device 1 is released, and the third suction pad 31 of the conveyance device 3 sucks the upper end portion Ga of the foremost glass plate G. In the present embodiment, after the suction by the first suction pad 11 is released, the suction by the third suction pad 31 is started, but after the suction by the third suction pad 31 is started, the suction by the first suction pad 11 You may release

  Next, as shown in FIG. 9, the second suction pad 21 of the protective sheet holding device 2 is moved to the side (c direction) with suction of the protruding portion Sa of the protective sheet S on the back surface, thereby protecting the rear surface. The sheet S is pulled out from the rear side of the frontmost glass plate G. At this time, the adhesion between the back protective sheet S and the foremost glass plate G is sufficiently reduced by the wedge W, so that the back protective sheet S can be pulled out smoothly. The removal of the back protection sheet S may be performed by suctioning the protection sheet S. Alternatively, the movement of the second suction pad 21 to the side (direction c) and the suction of the protective sheet S may be combined. Moreover, in this embodiment, before taking out the foremost glass plate G from the pallet P, the protective sheet S on the back is removed from the back side of the foremost glass plate G, but the foremost glass plate G is After removal from P, the back protective sheet S remaining on the pallet P may be removed.

  On the other hand, the frontmost glass plate G is transported by the transport device 3 to the post-process in the state of the vertical attitude (preferably, the vertical attitude). That is, in the present embodiment, the separation step also serves as the transfer step of the glass sheet G.

  As shown in FIGS. 10 and 11, the transport device 3 has a third suction pad 31 for adsorbing the upper end Ga of the foremost glass plate G from the front side, and the upper end Ga of the foremost glass plate G as the front and back. The chuck 32 and the base portion 33 are provided. A plurality of third suction pads 31 and chucks 32 are arranged at intervals along the upper end Ga of the foremost glass plate G. In the present embodiment, one third suction pad 31 and one chuck 32 are combined into one set, and a plurality of sets are attached to one base portion 33. The base portion 33 is a movable body movable in the XYZ directions. By moving the base portion 33, adjustment of the standby position (the position in the state of FIG. 11) of the third suction pad 31 and the chuck 32 and conveyance of the glass plate G become possible. The movement of the base portion 33 is realized, for example, by combining a plurality of feed mechanisms.

  The chuck 32 is attached to the base portion 33 via the first arm 34. A cylinder 35 is mounted on the side surface of the chuck 32, and a third suction pad 31 is mounted on the piston rod 35a of the cylinder 35 via the second arm 36.

  The third suction pad 31 moves from the standby position by the expansion and contraction operation of the cylinder 35. The expansion and contraction direction of the piston rod 35a may be horizontal as long as it is along the Y direction, but in the present embodiment, it is slightly inclined with respect to the horizontal direction so as to be parallel to the laminating direction of the glass plates G. ing.

  The chuck 32 is opened and closed by an expansion and contraction operation of a built-in cylinder (not shown).

  For the cylinder 35 for adjusting the position of the third suction pad 31 and the cylinder (not shown) for opening and closing the chuck 32, an electric cylinder having an air cylinder, a hydraulic cylinder, and a servomotor can be used. However, since the use of an air cylinder or a hydraulic cylinder has the advantage of facilitating wiring and maintenance as compared to the case of using an electric cylinder, it is preferable to use an air cylinder or a hydraulic cylinder. In the present embodiment, an air sinker is used.

  Next, the operation of the transfer device 3 in the separation step, that is, the transfer step of the glass sheet G will be described.

  In the transfer step of the glass plate G, an absorption step of adsorbing the foremost glass plate G with the third suction pad 31 and separating at least a part of the foremost glass plate G from the laminate L, and the foremost glass plate And a pinching step of pinching the portion pulled away from the laminated body L of G by the chuck 32.

  In the suction step, first, as shown in FIG. 11, the third suction pad 31 and the chuck 32 are positioned at the respective standby positions by the movement of the base portion 33. At this time, the chuck 32 stands by in the open state. The standby position is changed according to the number of glass plates G stacked on the pallet P. For example, every time the glass plate G is taken out from the pallet P, the standby position is changed by approaching the back support Pb by a distance corresponding to the thickness of the glass plate G from which the base 33 is taken out.

  Next, as shown in FIG. 12, by retracting the cylinder 35, the third suction pad 31 moves rearward from the standby position and contacts the upper end portion Ga of the foremost glass plate G from the front side. In this state, the third suction pad 31 sucks the upper end portion Ga of the foremost glass plate G.

  Thereafter, as shown in FIG. 13, the upper end portion Ga of the foremost glass plate G adsorbed by the third suction pad 31 is pulled away from the laminate L by extending the cylinder 35. The third suction pad 31 moves the upper end portion Ga of the foremost glass plate G to a position where it can be held by the chuck 32 waiting at the standby position.

  In the holding step, the upper end Ga of the glass plate G separated from the laminate L by the third suction pad 31 is held from both the front and back sides by the chuck 32 waiting at the standby position.

  In this embodiment, the entire upper end portion Ga of the glass plate G is set with the lower end portion Gb of the glass plate G as a fulcrum F while the lower end portion Gb of the glass plate G is grounded to the bottom surface support portion Pa of the pallet Caused in the d direction. In this way, since the position of the upper end Ga of the glass plate G can be determined based on the position of the lower end Gb of the glass plate G, the positioning accuracy of the glass plate G with respect to the chuck 32 is improved. Therefore, the upper end portion Ga of the glass plate G can be reliably held by the plurality of chucks 32.

  In the process of moving the upper end Ga of the foremost glass plate G adsorbed by the third adsorption pad 31 to a position where it can be held by the chuck 32, the foremost glass plate G is lifted by the third adsorption pad 31. The lower end portion Gb of the foremost glass plate G may be separated from the bottom surface support portion Pa. That is, in order to sandwich the foremost glass plate G by the chuck 32, the entire foremost glass plate G may be pulled away from the laminate 11.

  Here, although the inclination angle of the glass plate G changes in the process of moving the third suction pad 31 by the expansion and contraction operation of the cylinder 35, the third suction pad 31 has a bellows shape, so the change of the inclination angle of the glass plate G The angle of the suction surface also changes accordingly. Therefore, even if the inclination angle of the glass plate G changes, the holding force of the third suction pad 31 does not decrease. The third suction pad 31 may be swingably supported by a link mechanism or the like instead of or in combination with the third suction pad 31 in a bellows shape.

  As shown in FIG. 14, when the upper end portion Ga of the glass plate G is held by the chuck 32, the suction of the third suction pad 31 is released and the cylinder 35 further extends, and the third suction pad 31 is the upper end of the glass plate G Leave the department Ga. As described above, when the glass plate G is transferred from the third suction pad 31 to the chuck 32, the glass plate G is moved in the predetermined direction along with the movement of the base portion 33 while the upper end Ga is held in the vertical posture. It is transported. In this embodiment, the base portion 33 separates the lower end portion Gb of the glass plate G from the bottom surface support portion Pa, and then conveys it along the direction (X direction) parallel to the surface of the glass plate G. The conveyance direction of the carrier is not particularly limited. For example, it may be transported along a direction (Y direction) perpendicular to the surface of the glass plate G.

  As a post process of a separation process, a posture change process which changes glass plate G from a vertical posture to a horizontal posture (preferably horizontal posture) is mentioned, for example. And as a process after an attitude | position change process, the cutting process which cut | disconnects glass plate G changed into the horizontal attitude | position to predetermined size, end surface processing processes, such as chamfering of an end surface, a washing process etc. are mentioned, for example. Of course, the process after the separation process may be a process of performing manufacturing related processing such as cutting on the glass plate G in the vertical position.

  The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the technical idea thereof.

  The transport device 3 is a device that takes out the glass sheet G at the forefront from the laminate L and transports it. Therefore, the operation (conveying process of the glass plate G) of the conveying device 3 is not limited to the case where the above-mentioned raising process and wrinkle forming process related to the processing of the back protection sheet P are performed. That is, the operation of the transfer device 3 may be started without performing the raising step or the wrinkle forming step. In this case, when the glass sheet G is stuck together and the protective sheet P is lifted together by the operation of the conveying device 3, for example, the protective sheet P may be dropped by its own weight or air supplied from an air nozzle. Alternatively, the operation of the transport device 3 may be started after the adhesion between the foremost glass plate G and the back protective sheet S is relieved in a process different from the inducing process or the wrinkle forming process.

  In the transport device 3, the third suction pad 31 and the chuck 32 may not be attached to a common moving body (base portion 33). In this case, for example, after the glass plate G is transferred from the third suction pad 31 to the chuck 32 in the separation step, the movement in which the chuck 32 is mounted with the third suction pad 31 waiting at the transfer position or its periphery Only the body may move to convey the glass plate G.

  The transport device 3 holds the glass plate G adsorbed by the third adsorption pad 31 with the chuck 32 and then releases the adsorption of the third adsorption pad 31, and the glass plate G is held by the third adsorption pad 31 and the chuck 32. It may be transported in a held state.

  In the inducing step, the upper portions of the side ends Gc on both sides in the width direction of the foremost glass plate G are adsorbed and caused, and in the crease forming step, the protruding portions Sa on both sides in the width direction of the back protective sheet S The wedges W may be formed on the back protective sheet S by adsorbing each and moving it downward.

  In the inducing step, a portion (preferably one upper corner portion Gd) of the upper end portion Ga of the foremost glass plate G is adsorbed and caused, and from the upper end portion Ga of the foremost glass plate G in the weir forming step Wrinkles W may be formed on the back protective sheet S by adsorbing the protruding portion Sa of the back protective sheet S that has been pushed out and moving it in the width direction.

  The glass plate G and the protective sheet S may be stacked on the pallet P in a flat manner. Also in this case, the glass plate removal step includes, for example, a raising step, a crease forming step, and a separation step.

  Specifically, as shown in FIG. 15 and FIG. 16, in the case of flat placement, in the raising step, for example, any one corner of the foremost glass plate G is a first suction pad from the front side (upper side) It adsorbs at 11 and causes upward. In this case, in the crease forming step, in order to form the crease W on the back protective sheet S, for example, it was extracted from one of the two ends (two sides) constituting the corner thereof The protruding portion Sa of the back protective sheet S is adsorbed by the second suction pad 21 and moved along one end (in the illustrated example, the X direction) of the glass plate G.

  As shown in FIG. 17 and FIG. 18, in the case of the flat placement, in the separation step, for example, the third suction pad 31 sucks the peripheral portion of the frontmost glass plate G from the front side (upper side). As shown in FIG. 17, after lifting one end of the foremost glass plate G with the third suction pad 31, as shown in FIG. 18, the other end of the foremost glass plate G is thirdly removed. The suction pad 31 lifts it. Alternatively, both ends of the foremost glass plate G are simultaneously lifted by the third suction pad 31. By this lifting operation, the foremost glass plate G is moved in a horizontal attitude (for example, horizontal attitude) to a position where it can be held by the chuck 32, and both ends of the foremost glass plate G are moved by the chuck 32 from both front and back sides. Hold it. The foremost glass plate G sandwiched by the chucks 32 is conveyed, for example, in the horizontal attitude.

  Here, as shown in FIG. 19, in the process of moving the foremost glass plate G adsorbed by the third suction pad 31 to a position where it can be held by the chuck 32, the foremost glass plate G is rotated and the horizontal attitude is achieved. You may change from a vertical posture. In this case, the chuck 32 holds, for example, the upper end portion of the foremost glass plate G changed to the vertical posture from both the front and back sides. The foremost glass plate G held by the chuck 32 is conveyed, for example, in the vertical posture.

  Although said protection sheet holding | maintenance apparatus 2 demonstrated the holding form which adsorb | sucks the protrusion part Sa of protective sheet S in said embodiment, a holding form in particular is not limited. For example, the holding form which clamps the protrusion part Sa may be sufficient.

  In the above embodiment, the case of automatically performing the glass plate removal step by the glass plate removal device has been described, but part or all of the glass plate removal step may be performed using the hand of the worker.

DESCRIPTION OF SYMBOLS 1 glass plate holding | maintenance apparatus 11 1st suction pad 2 protection sheet holding apparatus 21 2nd suction pad 3 conveyance apparatus 31 3rd suction pad 32 chuck 33 base part 34 1st arm 35 cylinder 36 2nd arm L laminated body G glass plate S Protective sheet Sa Extruding portion P Pallet Pa Bottom support portion Pb Back support portion C Gap W 皺

Claims (7)

In a manufacturing method of a glass plate provided with a conveyance process of taking out the glass plate one by one from a laminate including a plurality of glass plates and conveying it,
The transfer step is an adsorption step of adsorbing the glass plate with a suction pad to separate at least a part of the glass plate from the laminate;
And a clamping step of clamping a portion of the glass plate pulled away from the laminate with a chuck.   The method for manufacturing a glass sheet according to claim 1, wherein the suction pad and the chuck are mounted on a single moving body. In the suction step, the glass plate is moved by the suction pad to the standby position of the chuck in a state where the chuck stands by at a position where the glass plate can be held.
The method according to claim 1, wherein in the holding step, the glass plate is held by the chuck at the standby position.   The method according to any one of claims 1 to 3, wherein the opening and closing of the chuck and the movement of the suction pad in the suction step are performed using an air cylinder or a hydraulic cylinder. .   The glass plate according to any one of claims 1 to 4, wherein the glass plate is vertically stacked in the state of the laminate, and the chuck conveys the glass plate in a vertical posture. Manufacturing method.   The method for manufacturing a glass plate according to claim 5, wherein the upper end portion of the glass plate is separated from the laminate while the lower end portion of the glass plate is grounded. In a glass plate conveying apparatus for taking out and conveying the glass plates one by one from a laminate including a plurality of glass plates,
An adsorption pad which adsorbs the glass plate and pulls at least a part of the glass plate away from the laminate;
And a chuck for holding a portion of the glass plate pulled away from the laminate.

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