JP5354280B2 - Glass plate package - Google Patents

Description

  The present invention is an improved technology of a glass plate package that employs a packing form in which a glass plate laminate in which a protective sheet is interposed between each of a plurality of glass plates is supported on the support surface of a pallet from below. About.

  As is well known, typical glass substrates used in flat panel displays (FPD) such as liquid crystal display devices (LCD), plasma display devices (PDP), field emission display devices (FED), and organic EL display devices (OELD). As described above, various types of glass plates have recently been required to be further increased in size and thickness. Therefore, it is the actual situation that the glass plate that has been made large and thin in order to meet the demand is more likely to be damaged, and the packaging form during transportation is becoming more important.

  And as a packing form of such a large and thin glass plate, a glass plate laminated body in which a protective sheet is interposed between each of a plurality of glass plates is supported from below by a support surface of a pallet. The form to do is spreading. The reason is that stress concentration is unlikely to occur in the peripheral portion of the glass plate that is easily damaged in the packaging form.

  As a specific example of this type of packaging, as disclosed in the following Patent Document 1, a shock absorber is interposed between the glass plate laminate and the pallet, and the following Patent Documents 2 and 2 are used. As disclosed in FIG. 5, there is one that presses and fixes the glass plate laminate to the support surface side of the pallet from above.

JP 2007-39091 A JP 2006-264786 A JP 2006-327642 A JP 2007-30964 A JP 2007-112463 A

  By the way, if the surface of the FPD glass substrate is scratched, there may be a problem that an element cannot be formed on the surface or the wiring is cut at the scratched portion. Therefore, when transporting a glass substrate for FPD (hereinafter simply referred to as a glass substrate), it is indispensable not only to prevent damage to the glass substrate but also to prevent damage to the surface of the glass substrate. Further, even in a glass plate other than the glass substrate for FPD, a scratch on the surface leads to a decrease in the product value as the glass plate, so that the surface of the glass plate is not damaged like the glass substrate for FPD. It is important to transport.

  However, as disclosed in the above-mentioned Patent Document 1, in the packing form in which the shock absorbing material is arranged between the glass plate laminate and the pallet, for example, along the support surface with respect to the pallet during transportation by truck. When a force is input in the surface direction, a deviation may occur between the glass plate and the protective sheet. This is due to the following reason.

  That is, the glass plate and protective sheet which are located in the lower part of the glass plate laminate are pressed against the pallet via the shock absorber by the load from above. For this reason, the glass plate and the protective sheet are unlikely to move relative to the pallet, and when the pallet moves in the surface direction, the glass plate and the protective sheet tend to move integrally with the pallet. On the other hand, the glass plate and the protective sheet located in the upper part of the glass plate laminate are in a state where relative movement is likely to occur between the glass plate and the protective sheet because the load from above is weakened. Therefore, when the impact applied to the pallet cannot be sufficiently absorbed by the impact absorbing material, a shift is likely to occur between the glass plate and the protective sheet with the upper portion of the glass plate laminate as the center.

  And when a gap | deviation arises between a glass plate and a protective sheet in this way, a glass plate and a protective sheet will rub against each other and will cause a fine crack on the surface of a glass plate. Moreover, when such a shift | offset | difference arises, the position on the pallet of each laminated | stacked glass plate will become uneven when it sees from upper direction. In the glass plate removal work after the completion of transportation, it is customary to automatically take out the glass plates one by one from the pallet using a robot hand. Therefore, it is necessary to finely adjust the position of the robot hand in accordance with the position of the glass plate, and the workability of the glass plate taking-out operation is significantly lowered.

  And the problem that a gap | deviation arises between such a glass plate and a protective sheet is packaging provided with the mechanism which presses down a glass plate laminated body to the pallet side as it is indicated by said patent documents 2-5. The same can occur in the form. This is due to the following reason. That is, when the force which presses a glass plate laminated body to a pallet side is strengthened too much, a glass plate will be damaged. Therefore, it is virtually impossible to press the glass substrate laminate strongly against the pallet side and completely fix it to the pallet. Therefore, the support surface of the pallet (surface that supports the glass substrate laminate) with respect to the pallet. When a force is input in the surface direction along the direction, a deviation may still occur between the glass plate and the protective sheet included in the glass plate laminate.

  In view of the above circumstances, the present invention prevents the occurrence of scratches on the glass plate by reducing as much as possible the shift that occurs between the glass plate and the protective sheet contained in the glass plate laminate during transportation. At the same time, it is a technical subject to keep the working efficiency of the glass plate taking-out work after the completion of transportation.

In order to solve the above problems, the first invention is a glass plate laminate in which a lowermost layer is a protective sheet and a plurality of glass plates are stacked with a protective sheet interposed between them. A glass plate package that is supported from below by a support surface, and when a force is input to the pallet in a surface direction along the support surface, the lowermost layer of the glass plate laminate and the support surface The amount of slip in the surface direction between the glass plate and the protective sheet is larger than the amount of slip in the surface direction between the glass plate and the protective sheet. In addition, the “slip amount” in the plane direction between the lowermost layer of the glass plate laminate and the support surface means a relative movement distance between the lowermost layer of the glass plate laminate and the support surface, The “slip amount” in the surface direction between the protective sheet means a relative movement distance between the glass plate and the protective sheet. Furthermore, in the slip amount in the surface direction between the latter glass plate and the protective sheet, there is no slip between the glass plate and the protective sheet in addition to the case where the slip occurs between the glass plate and the protective sheet. Cases are also included. In the present specification, the “surface direction” along the support surface of the pallet means a direction of a plane including the support surface or a direction of a plane parallel to the support surface.

  According to such a configuration, when a force is input in the surface direction along the support surface with respect to the pallet due to an external impact or the like during transportation, the gap between the lowermost layer of the glass plate laminate and the support surface is determined. Since the slip amount in the surface direction of the glass plate is larger than the slip amount in the surface direction between the glass plate and the protective sheet, the entire glass plate laminate is prior to the occurrence of a gap between the glass plate and the protective sheet. Therefore, it moves while sliding on the support surface of the pallet. That is, even when a force is input in the surface direction along the support surface with respect to the pallet, the entire glass plate laminate is input to the pallet by moving integrally on the support surface of the pallet. Since the force in the surface direction can be absorbed, it is possible to reduce as much as possible the situation in which a shift occurs between the glass plate included in the glass plate laminate and the protective sheet. Therefore, it is possible to reliably reduce the friction between the glass plate and the protective sheet and the situation where the positions of the glass plates on the pallet are uneven. Therefore, it is possible to prevent a situation in which the glass plate is damaged during transportation, and it is not necessary to perform complicated positioning of the robot hand even when the glass plate is taken out after the transportation is completed. It is possible to execute it.

A second invention created in order to solve the above-described problem is a pallet comprising a glass plate laminate in which a lowermost layer is a protective sheet and a plurality of glass plates are stacked with a protective sheet interposed between each other. a glass plate package body formed by supported from below by the support surface, the coefficient of friction between the lowermost layer and the support surface of the glass plate laminate, friction between the protective sheet and the glass plate Characterized by being smaller than the coefficient. The “friction coefficient” here is a value obtained as follows. That is, first, one material is fixed to a plate having a flat surface, and the other material is fixed to the bottom surface of a weight of about 1 kg having a flat bottom surface of 60 mm × 100 mm. Then, after the other material is placed on the one material, the plate on which the one material is fixed is gradually tilted, and the tangent of the angle at which the weight starts to move is plural times (preferably five times). Measured above, and the average value of the measured values is taken as the friction coefficient. In the following, the value of the friction coefficient is a value measured by the method.

  According to such a structure, the direction between the lowermost surface of a glass plate laminated body and the support surface of a pallet becomes slippery rather than between a glass plate and a protection sheet. Therefore, when force is input to the pallet in the surface direction along the support surface due to external impact, etc., the entire glass plate laminate takes precedence before the gap between the glass plate and the protective sheet occurs. It moves while sliding on the support surface of the pallet. That is, even when a force is input in the surface direction along the support surface with respect to the pallet, the entire glass plate laminate is input to the pallet by moving integrally on the support surface of the pallet. Since the force in the surface direction is absorbed, it is possible to reduce as much as possible the situation in which a shift occurs between the glass plate included in the glass plate laminate and the protective sheet. Therefore, it is possible to reliably reduce the friction between the glass plate and the protective sheet and the situation where the positions of the glass plates on the pallet are uneven. Therefore, it is possible to prevent a situation in which the glass plate is damaged, and it is possible to perform the work while maintaining good work efficiency even when the glass plate is taken out using the robot hand after the transportation is completed. Become.

  Said structure WHEREIN: It is preferable that the support surface of the said pallet is formed with the low friction material arrange | positioned at the upper surface of a pallet main body.

  In this way, since the support surface of the pallet is formed of a low friction material that is separate from the pallet body, the above-described pallet body itself may be formed without using a special material such as a low friction material. The effect can be achieved. In addition to the sheet-like material, the low-friction material referred to here is, for example, a powder-like or micro-bead-like material used by directly spraying on the top surface of the pallet body, or sputtering on the top surface of the pallet body. And those that are surface-modified by spraying chemicals.

  In the above configuration, the low friction material may be disposed on the upper surface of the pallet body via an impact absorbing material.

  If it does in this way, since the force input into the pallet is weakened by the shock absorber, the amount of slip itself between the lowermost layer of the glass plate laminate and the support surface can be reduced. Therefore, it becomes possible to reduce more reliably the ratio which a gap produces between the glass plate contained in a glass plate laminated body, and a protection sheet.

  Said structure WHEREIN: It is preferable that the said protective sheet is formed with paper or foamed resin.

  In other words, when paper is used as the protective sheet, the used protective sheet can be easily disposed or reused after transportation is completed, which is advantageous in terms of environment, and when foamed resin is used as the protective sheet. It is advantageous in that the glass plate can be protected with an appropriate cushioning property.

  In the above configuration, a regulating member that regulates a range of movement of the glass plate laminate on the support surface of the pallet may be erected around the glass plate laminate.

  If it does in this way, the movable range on the support surface of the pallet of a glass plate laminated body will be restrict | limited by a control member. Therefore, for example, even when an excessive impact more than normally assumed is applied to the pallet, it is possible to prevent the situation where the glass plate laminate falls to the outside of the support surface of the pallet.

  Said structure WHEREIN: It is preferable that the said glass plate is a glass substrate for flat panel displays.

  As described above, according to the present invention, it is possible to reduce as much as possible the shift that occurs between the glass plate and the protective sheet contained in the glass plate laminate during transportation. Therefore, it is possible to prevent a situation in which the glass plate is damaged, and it is possible to keep the working efficiency of the glass plate taking-out operation after the completion of transportation.

It is a perspective view which shows the glass plate package which concerns on 1st Embodiment of this invention. It is a components disassembled arrangement perspective view of the glass plate packing object concerning a 1st embodiment. It is a perspective view which shows the glass plate package which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the glass plate package which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the modification of the glass plate package which concerns on 3rd Embodiment. It is a figure for demonstrating gap (DELTA) a of the glass plate laminated body in an Example. It is a figure for demonstrating the movement amount (DELTA) b of the glass plate laminated body in an Example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view schematically showing a glass plate package according to the first embodiment of the present invention, and FIG. 2 is an exploded perspective view of parts of the glass plate package shown in FIG.

  As shown in FIG. 1, this glass plate package 1 supports a glass plate laminate 4 on a support surface 3 of a pallet 2.

  As shown in FIG. 2, the supported glass plate laminate 4 is obtained by stacking a protective sheet 5 and a glass plate 6 in order from below, and in this embodiment, the uppermost glass plate 6. Further, the protective sheet 5 and the top plate 7 are further stacked on top of each other. As the protective sheet 5, a foamed resin sheet or paper manufactured from virgin pulp is used. Further, the protective sheet 5 is larger than the glass plate 6 and protrudes outward from the four sides of the glass plate 6 in a state of being interposed between the glass plates 6. It also serves to protect the end face of the glass plate 6. In addition, from the viewpoint of protecting the end face of the glass plate 6 in this way, it is preferable that the protruding dimension of the protective sheet 5 is equal to or greater than the thickness of the glass plate 6 for each side of the glass plate 6.

  The support surface 3 of the pallet 2 is formed by laying and fixing a low friction sheet material on the upper surface of the pallet body 8. And by forming the support surface 3 with a low friction sheet material in this way, the friction coefficient between the lowermost layer (the protective sheet 5 in this embodiment) of the glass plate laminate 4 and the low friction sheet material 3 is When the friction coefficient between the glass plate 6 and the protective sheet 5 is smaller and a force is input to the pallet 2 in the surface direction along the support surface 3 (hereinafter simply referred to as the surface direction), the glass plate is laminated. The slip amount in the surface direction between the protective sheet 5 and the low friction sheet material 3 located in the lowermost layer of the body 4 becomes larger than the slip amount in the surface direction between the glass plate 6 and the protective sheet 5. ing. In addition, the slip amount of the surface direction between the protection sheet 5 located in the lowest layer of the glass plate laminated body 4 here and the low friction sheet material 3 is the protection located in the lowest layer of the glass plate laminated body 4, for example. It is defined as a separation distance after transportation between the center point of the sheet 5 and the contact point of the low friction sheet material 3 that is in contact with the center point at the stage before transportation. The slip amount in the plane direction between the glass plate 6 and the protective sheet 5 is, for example, between the center point of the glass plate 6 and the contact point of the protective sheet 5 that is in contact with the center point at the stage before transportation. Is defined as the separation distance after transportation.

  Support columns 9 are erected at the four corners of the upper surface of the pallet body 8. Fitting protrusions 10 are formed on the upper surface of each support column 9, and fitting recesses (not shown) that are respectively fitted to the fitting protrusions 10 of the support columns 9 at the four corners of the lower surface of the pallet body 8. Is formed. Thereby, by fitting the fitting concave portion of the pallet 2 used in the other glass plate packing body 1 into the fitting convex portion 10 of the pallet 2 used in the one glass plate packing body 1, A plurality of glass plate packages 1 can be stacked in the vertical direction.

  As described above, according to the glass plate package 1 according to the first embodiment, even when a force is input in the surface direction against the pallet 2 due to an external impact or the like, the entire glass plate laminate 4 is It moves while sliding on the low friction sheet material 3 of the pallet 2 preferentially. Therefore, even if a force is input in the surface direction against the pallet 2 due to an external impact or the like, the glass plate 6 before the deviation occurs between the glass plate 6 included in the glass plate laminate 4 and the protective sheet 5. By moving the plate laminate 4 as a whole on the low friction sheet material 3 of the pallet 2, it is possible to absorb the surface force input to the pallet 2. Therefore, it is possible to reduce as much as possible the situation that rubbing occurs between the glass plate 6 and the protective sheet 5 included in the glass plate laminate 4 and the glass plate 6 is damaged. At the same time, it is possible to prevent a situation in which the positions of the glass plates 6 included in the glass plate laminate 4 on the pallet 2 are uneven when viewed from above, so that the glass plate is removed using a robot hand. Can be carried out smoothly while maintaining good working efficiency. In addition, since such an effect can be enjoyed by preferentially sliding the glass plate laminate 4 on the low friction sheet material 3 as described above, the glass plate laminate 4 is moved upward. Therefore, there is no need for a separate mechanism for pressing from the side to the pallet 2 side. Therefore, the configuration of the glass plate package 1 is not unduly complicated, and the weight of the glass plate package 1 is not increased.

  FIG. 3 is a perspective view showing a glass plate package according to the second embodiment of the present invention. The glass plate package 1 is different from the glass plate package 1 according to the first embodiment in that the low friction sheet material 3 is attached to the upper surface of the pallet body 8 via the shock absorber 11. is there. In this way, since the force input to the pallet 2 is weakened by the shock absorber 11, the amount of slip itself between the lowermost layer of the glass plate laminate 4 and the low friction sheet material 3 can be reduced and more stable. It will be the packing form. At this time, the impact absorbing material 11 may be in contact with the entire lower surface of the low friction sheet material 3 or may be in partial contact with the lower surface of the low friction sheet material 3 as shown in the drawing. Further, the shock absorbing material 11 may be fixed to at least one of the low friction sheet material 3 and the pallet main body 8, and of course both of them are not fixed to either the low friction sheet material 3 or the pallet main body 8. It may be only in physical contact with.

  FIG. 4 is a perspective view showing a glass plate package according to a third embodiment of the present invention. This glass plate package 1 is different from the glass plate package 1 according to the first embodiment in that the glass plate laminate 4 is provided on the four sides around the glass plate laminate 4 supported by the support surface 3 of the pallet 2. The restriction member 12 for restricting the movable range of the pallet 2 on the support surface 3 is erected. Each regulating member 12 is separated from the side surface of the glass plate laminate 4 by, for example, about 15 to 25 mm in the initial state in which the glass plate laminate 4 is laminated on the support surface 3 of the pallet 2. Moreover, it is preferable that an impact absorbing material such as rubber is attached to a portion of the regulating member 12 that actually contacts the glass plate laminate 4 and regulates the movement of the glass plate laminate 4.

  In addition, as shown in FIG. 5, of course, you may attach the regulating member 12 to the glass plate package 1 which concerns on 2nd Embodiment mentioned above. Moreover, in the glass plate package 1 shown in FIGS. 4 and 5, the regulating member 12 may be detachable from the pallet body 8. If it does in this way, at the time of the lamination | stacking operation | work and taking-out operation | work of the glass plate laminated body 4, the restriction | limiting member 12 will not interfere with an operation | work by removing the restriction member 12 previously.

  As Example 1 of the glass plate package 1 according to the present invention, the one shown in FIG. 4 was manufactured. The glass plate package 1 is manufactured as follows. First, a low-friction sheet material 3 made of polypropylene three-fold expanded resin having a length of 2200 mm, a width of 2500 mm, and a thickness of 5 mm is laid and fixed on the upper surface of an aluminum pallet body 8 having a length of 2270 mm, a width of 2900 mm, and a thickness of 150 mm. On this low friction sheet material 3, a foamed resin sheet made of polyethylene 40 times foamed resin having a length of 2260 mm, a width of 2560 mm, and a thickness of 0.5 mm is placed as the lowermost protective sheet 5 of the glass plate laminate 4. On this lowermost protective sheet 5, a glass plate 6 having a length of 2200 mm, a width of 2500 mm and a thickness of 0.7 mm and a foamed resin sheet made of polyethylene 40 times expanded resin having a length of 2260 mm, a width of 2560 mm and a thickness of 0.5 mm are formed. A total of 200 protective sheets 5 (100 glass sheets and 100 protective sheets) are stacked one by one in order from the bottom. Furthermore, a top plate 7 made of polypropylene three-fold foamed resin having a length of 2200 mm, a width of 2500 mm, and a thickness of 5 mm is disposed on the uppermost layer of the glass plate laminate 4. In this state, each glass plate 6 included in the glass plate laminate 4 is held in a horizontal posture without being bent. Further, in the initial state immediately after the completion of the laminating operation of the glass plate laminate 4, an interval of about 20 mm is provided between the glass plate laminate 4 and each regulating member 12.

  In this case, since the low friction sheet material 3 is fixed to and integrated with the pallet body 8 made of aluminum, the slip between the low friction sheet material 3 and the pallet body 8 can be substantially ignored. On the other hand, when the coefficient of friction between the low friction sheet material 3 and the protective sheet (foamed resin sheet) 5 not fixed to each other was measured, the value was 0.31. Similarly, when the friction coefficient between the protective sheet 5 and the glass plate 6 which are not fixed to each other is measured, the value is 1.86. That is, the slipperiness generated between the glass plate 6 and the protective sheet 5 included in the glass plate laminate 4 is compared with the slipperiness generated between the glass plate laminate 4 and the low friction sheet material 3. It is very difficult to slip. This means that when an impact is applied to the glass plate package 1, the glass plate 6 and the protective sheet 5 of the glass plate laminate 4 are moved together on the low friction sheet material 3.

As a second example of the glass plate package 1 according to the present invention, a glass plate package 1 according to the first example was manufactured which was different from the glass plate package 1 according to the first example only in that the protective sheet 5 was paper. The paper used as the protective sheet 5 was paper having a length of 2260 mm, a width of 2560 mm, a basis weight of 50 g / cm ² , and virgin pulp as a raw material.

  In this case, as in the first embodiment, the low friction sheet material 3 is fixed to and integrated with the pallet body 8 made of aluminum, so that slip between the low friction sheet material 3 and the pallet body 8 is not caused. Virtually negligible. On the other hand, the friction coefficient between the low-friction sheet material 3 and the protective sheet (paper) 5 that are not fixed to each other is 0.25, and similarly, the protective sheet 5 and the glass plate 6 that are not fixed to each other. The coefficient of friction was 0.44. As in the first embodiment, this means that when an impact is applied to the glass plate package 1, the glass plate 6 and the protective sheet 5 of the glass plate laminate 4 are substantially integrated on the low friction sheet material 3. It means to move.

  As a third embodiment of the glass plate package 1 according to the present invention, the one shown in FIG. 5 was manufactured. More specifically, the glass plate package 1 is manufactured as follows. First, shock absorbers 11 made of 30 times expanded polypropylene having a length of 500 mm, a width of 500 mm, and a thickness of 20 mm are arranged and fixed at the four corners and the center of the same aluminum pallet main body 8 as in the first embodiment. 11, the low friction sheet material 3 made of the same polypropylene three-fold foamed resin as that of the first embodiment is disposed and fixed so as to straddle the upper part. Other conditions are the same as in the first embodiment.

  As a fourth embodiment of the glass plate package 1 according to the present invention, the glass plate package 1 according to the third embodiment is only the point that the protective sheet 5 interposed between the glass plates 6 one by one is paper. I made something different.

  As a comparative example, on the upper surface of the same aluminum pallet main body as in Example 1, a total of four papers manufactured from virgin pulp were laminated, and manufactured from a glass plate and virgin pulp of the same size as in Example 1. A total of 200 sheets of paper were alternately laminated, and a top plate made of polypropylene three-fold foamed resin was placed thereon to produce a glass plate package.

  And in order to reproduce the shaking at the time of transporting each of the glass plate package 1 according to Examples 1 to 4 manufactured as described above and the glass plate package according to the comparative example, they are loaded on a vibration device. A vibration test was performed. In this vibration test, an acceleration of an average of ± 0.5 G in the horizontal direction (X and Y directions) and an average of ± 1.0 G in the vertical direction (Z direction) is applied at a frequency of 10 to 30 Hz for 2 hours. In addition, during this period, an acceleration (X direction: ± 1.5 G, Y direction: ± 1.5 G, Z direction: ± 3.0 G) that is three times the average acceleration in the horizontal direction and the vertical direction is set in each corresponding direction. The test was performed by giving 8 times at random. And after this vibration test, the shift | offset | difference (DELTA) a of the glass plate laminated body 4 of Examples 1-4 and the glass plate laminated body of a comparative example was measured, respectively. The measurement results are shown in Table 1 below. In Examples 1 to 4, as shown in FIG. 6, the deviation Δa is positioned at the uppermost portion of the glass plate 6 located at the lowermost portion of the glass plate 6 included in the glass plate laminate 4 after transport. It is assumed that the measurement is performed based on the amount of displacement in the horizontal direction between the glass plate 6 and the glass plate laminate 4 before transporting, so that Δa of the glass plate laminate 4 is zero. In the comparative example, Δa is measured in the same manner.

  According to said result, in the glass plate package which concerns on a comparative example, it can confirm that the big shift | offset | difference (DELTA) a has arisen in the glass plate laminated body with transport. On the other hand, in the glass plate package 1 according to Examples 1 to 4, it can be confirmed that the deviation Δa of the glass plate laminate 4 does not occur even after transportation. Also from this, in the glass plate package 1 which concerns on Examples 1-4, it can recognize that the shift | offset | difference which arises between the glass plate 6 and the protective sheet 5 during transport can be reduced as much as possible.

  Furthermore, as shown in FIG. 7 for each of the glass plate packages 1 according to Examples 1 to 4, when the amount of movement Δb before and after transportation on the lowermost pallet 2 of the glass plate laminate 4 was measured, Example 1 was 0.7 mm, Example 2 was 1.8 mm, Example 3 was 0.4 mm, and Example 4 was 0.5 mm. Also from this result, the glass plate package 1 according to Examples 3 and 4 in which the impact absorbing material 12 is interposed between the low friction sheet material 3 and the pallet main body 8 does not have the impact absorbing material 12 interposed. It can be confirmed that the amount of movement Δb of the glass plate laminate 4 before and after transportation is smaller than that of the glass plate package 1 according to Examples 1 and 2. Also from this, the movement amount of the glass plate laminated body 4 required in order to absorb the impact applied to the pallet 2 in the glass plate package according to Examples 3 and 4 with the shock absorber 12 interposed. It can be recognized that the package becomes smaller and more stable.

  Further, in the same type of packing form, a foamed resin sheet (Examples 1 and 3) is used rather than a sheet (Examples 2 and 4) using paper as the protective sheet 5 interposed between the glass plates 6 (Examples 1 and 3). In this case, the movement amount Δb of the glass plate laminate 4 is smaller. Also from this, it can be recognized that the one using a foamed resin sheet (polyethylene 40 times foamed resin) as the protective sheet 5 has a more stable packing form.

1 Glass plate package 2 Pallet 3 Support surface (low friction sheet material)
4 Glass plate laminate 5 Protective sheet 6 Glass plate 7 Top plate 8 Pallet body 9 Support column 10 Fitting convex portion 11 Shock absorber 12 Restriction member

Claims (7)

A glass plate package in which a lowermost layer is used as a protective sheet, and a glass plate laminate that is flatly stacked with a protective sheet interposed between each of a plurality of glass plates is supported from below by a support surface of a pallet. ,
When a force is input in the surface direction along the support surface with respect to the pallet, the slip amount in the surface direction between the lowermost layer of the glass plate laminate and the support surface is the glass plate and the A glass plate package characterized by being configured to be larger than the amount of sliding in the surface direction between the protective sheet. A glass plate package in which a lowermost layer is used as a protective sheet, and a glass plate laminate that is flatly stacked with a protective sheet interposed between each of a plurality of glass plates is supported from below by a support surface of a pallet. ,
The glass plate package characterized by making the friction coefficient between the lowermost layer of the said glass plate laminated body and the said support surface smaller than the friction coefficient between the said glass plate and the said protection sheet.   The glass plate package according to claim 1 or 2, wherein the support surface of the pallet is formed of a low friction material disposed on an upper surface of the pallet body.   The glass plate package according to claim 3, wherein the low friction material is disposed on an upper surface of the pallet body via an impact absorbing material.   The glass plate package according to any one of claims 1 to 4, wherein the protective sheet is formed of paper or foamed resin.   The glass plate package according to any one of claims 1 to 5, wherein a regulating member that regulates a movement range of the glass plate laminate on the support surface is erected around the glass plate laminate.   The said glass plate is a glass substrate for flat panel displays, The glass plate package of any one of Claims 1-6.

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