JP2019112141A - Glass sheet packaging pallet and glass sheet package - Google Patents

Abstract

To reduce breakage of a glass sheet to be packaged such that a lower side part of the vertically oriented glass sheet is supported from below by a plurality of supporting parts.SOLUTION: About a glass sheet packing pallet 2 having a plurality of support parts 10 supporting the lower side part 4a of a glass sheet 4 loaded in the vertical posture, and formed a support surface 15a which abuts the lower side part 4a of the glass sheet 4 in each of several support part 10, each of the plurality of support parts 10 has an expansion and contraction part 14 which is expanded and contracted in the vertical direction according to the load applied, the height difference of the support surface 15a between the plurality of support parts 10 is absorbed with the expansion and contraction of the expansion and contraction part 14 at the time of loading the glass sheet 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pallet for packing glass plates and a package for glass sheets.

  As a form of transport or storage of various glass plates including glass substrates for flat panel displays and glass substrates for solar cells, in a state where a plurality of glass plates are vertically stacked on a pallet The form to pack is known.

  Patent Document 1 discloses an example of this type of packaging form. In this embodiment, a pallet for packing glass plates for loading glass plates is provided with a plurality of support portions (lower support portions in the same document) for supporting the lower side portion of the glass plates loaded in the vertical orientation from below. It is done. Each of the plurality of support portions is formed with a support surface that contacts the lower side of the glass plate.

JP, 2011-246147, A

  By the way, in the packing form disclosed in Patent Document 1, there is a problem to be solved as follows.

  That is, by repeatedly using the above-mentioned pallet for glass plate packing, the pallet itself is deformed so as to be twisted or the support surface formed on the support portion is worn away by sliding with the glass plate . Due to this, as shown in FIG. 6A, in the pallet for glass plate packing 100, the height difference of the support surface 200a among the plurality (four in this case) of the support portions 200 due to aging deterioration. May occur. When such a situation occurs, as shown in FIG. 6 (b), the lower side 300a of the glass plate 300 to be originally supported by the four supporting parts 200 has an excessively small number (here, two). It will be in the state supported by the support part 200 of the case). As a result, an excessive load (stress) is locally applied to the lower side portion 300a, and as a result, the glass plate 300 may be broken.

  The present invention made in view of the above-described circumstances is technically aimed at reducing the breakage of a glass plate to be packaged in a mode in which the lower side of the glass plate in the vertical orientation is supported from below by a plurality of supporting portions. It will be an issue.

  The present invention invented to solve the above problems has a plurality of supports for supporting the lower side of the glass sheet loaded in the vertical posture from below, and each of the plurality of supports has a glass plate It is a pallet for glass plate packing in which the support surface which contacts a lower side part was formed, and each of a plurality of support parts has an elastic part which expands and contracts in the up-and-down direction according to the load applied, Sometimes, it is characterized in that it is configured to absorb the difference in height of the support surface between the plurality of support portions as the expansion and contraction portion expands and contracts.

  According to such a configuration, due to the repeated use of the glass plate packaging pallet, even if the height difference of the support surface is caused between the plurality of support portions due to the aged deterioration, the height difference is absorbed by the following operation. can do. That is, when the glass plate is loaded on the glass plate packing pallet, the stretchable portion is shrunk by the load applied from the glass plate in order from the support portion where the support surface is relatively high among the plurality of support portions. Along with this, the support surface sinks downward. As a result, among the plurality of supporting portions, the relatively high supporting surfaces are successively lowered to the same height as the relatively low supporting surfaces. Thus, the heights of the support surfaces are aligned, and it becomes possible to absorb the height difference. Therefore, it can be avoided that the lower side portion of the glass plate is supported by the number of support portions which is excessively smaller than the original number. As a result, it is possible to reduce the occurrence of a situation where an excessive load (stress) is applied to the lower side portion and the glass plate is broken.

  In the above configuration, it is preferable that the 25% compressive stress in the stretchable portion be in the range of 200 kPa to 290 kPa.

  In this manner, the stretchability of the stretchable portion is suitable, the ability of the stretchable portion to absorb the difference in height of the support surface is further improved, and the occurrence of breakage of the glass plate can be further reduced. In addition, by making the stretchability of the stretchable portion suitable, the durability of the stretchable portion can also be improved.

  In the above configuration, preferably, the stretchable portion is made of a foamable resin.

  In this way, the value of the 25% compressive stress of the stretchable portion falls within the above-mentioned preferred range, and the advantages described above can be obtained with certainty.

  In the above configuration, each of the plurality of support portions has a sheet-like protection portion superimposed on the stretchable portion and forming a support surface, and the protection portion is attachable to and detachable from the stretchable portion. Is preferred.

  In this way, at the time of loading of the glass plate, the protective portion is interposed between the lower side portion of the glass plate and the stretchable portion due to the presence of the sheet-like protective portion stacked above the stretchable portion. Thus, the contact between the lower side portion and the stretchable portion can be avoided. Therefore, the expansion-contraction part is damaged by the lower side part of a glass plate, and generation | occurrence | production which can not fully exhibit the function can be prevented reliably. Furthermore, since the protective portion is attachable to and detachable from the stretchable portion and is formed in a sheet shape, the protective portion is damaged by contact with the lower side portion of the glass plate, or the protective portion is glass Even when powder adheres, it is possible to quickly replace it with a new protective part (new product) free of scratches and adhesion of glass powder.

  In the above-described configuration, the back support surface has a plurality of back support portions that support from the back side a glass plate loaded in a vertical orientation, and each of the plurality of back support portions supports the back surface of the glass plate; It has a lateral expansion and contraction portion that expands and contracts in the lateral direction according to the load applied, and when the glass sheet is loaded, the height difference of the back support surface among the multiple back support portions along with the expansion and contraction of the horizontal expansion and contraction portion It is preferably configured to absorb.

  In the pallet for glass plate packing, when the glass plates loaded in the vertical posture are supported from the back side by a plurality of back surface supports, deformation of the pallet and wear of the back surface due to repeated use, etc. As a result, height differences in the back support surface may occur between the plurality of back support portions. When such a defect occurs, when the pallet vibrates during transportation, an excessive load may be locally applied to the glass plate to be damaged. However, in the present pallet, when the glass sheet is loaded, the height difference of the back support surface among the plurality of back support parts is absorbed with the expansion and contraction of the lateral expansion and contraction, so that the glass sheet may be broken. It is possible to reduce the occurrence.

  In the above-described configuration, it is preferable that the 25% compressive stress in the lateral expansion and contraction portion be in the range of 200 kPa to 290 kPa.

  In this way, the stretchability of the laterally stretchable portion is suitable, the ability of the laterally stretchable portion to absorb the difference in height of the back support surface is further improved, and the occurrence of breakage of the glass plate can be further reduced. Further, by making the stretchability of the laterally stretchable part suitable, the durability of the laterally stretchable part can also be improved.

  In the above-described configuration, the laterally stretchable portion is preferably made of a foamable resin.

  In this way, the value of the 25% compressive stress of the lateral expansion and contraction portion falls within the above-mentioned preferable range, and the advantages described above can be surely obtained.

  In the above configuration, it is preferable to have a receiving plate interposed between the back surface of the glass plate loaded in the vertical orientation and the plurality of back surface support portions.

  In this way, at the time of loading of the glass plate, the receiving plate is interposed between the back surface of the glass plate and the lateral expansion and contraction portion of the back surface support portion. Therefore, the contact between the glass plate and the lateral expansion and contraction part can be avoided. Therefore, it is possible to reliably prevent the occurrence of a situation in which the laterally stretchable portion is damaged by the glass plate and the function can not be sufficiently exhibited. In the case where the glass plate packaging pallet has a receiving plate, when a difference in height of the back support surface occurs among the plurality of back support portions, the back support surface and the back support surface float from the back support surface. There may occur a problem that the protective sheet of the glass plate is caught in the gap with the receiving plate. However, in the present pallet, as described above, since the height difference of the back support surface among the plurality of back support portions is absorbed, it is possible to accurately eliminate the above-mentioned problems.

  Moreover, also in the glass plate package provided with said pallet for glass plate packing, and the glass plate loaded by the said pallet for glass plate packing, it is possible to acquire the same effect | action and effect as a thing as stated above. .

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to reduce the failure | damage about this with respect to the glass plate packaged by the form which supports the lower side part of the glass plate of a vertical posture by several support parts from the downward direction.

It is a side view showing a glass plate package concerning a first embodiment of the present invention. It is a perspective view which shows the pallet for glass plate packing which concerns on 1st embodiment of this invention. Fig.3 (a) is a schematic front view which shows the pallet for glass plate packing which concerns on 1st embodiment of this invention, FIG.3 (b) is the glass plate package which concerns on 1st embodiment of this invention. It is a schematic front view shown. It is a side view showing a glass plate package concerning a second embodiment of the present invention. Fig.5 (a) is a schematic plan view which shows the pallet for glass plate packing which concerns on 2nd embodiment of this invention, FIG.5 (b) is the glass plate package which concerns on 2nd embodiment of this invention. It is a schematic plan view shown. Fig.6 (a) is a schematic front view which shows the conventional pallet for glass plate packing, FIG.6 (b) is a schematic front view which shows the conventional glass plate package.

  Hereinafter, the pallet for glass plate packing which concerns on embodiment of this invention, and a glass plate package are demonstrated, referring an accompanying drawing.

First Embodiment
As shown in FIG. 1, the glass sheet package 1 according to the first embodiment (hereinafter simply referred to as the package 1) is used as a pallet 2 for glass sheet packaging (hereinafter simply referred to as the pallet 2) and the pallet 2 It is equipped with the loaded glass plate laminate 3 (hereinafter simply referred to as laminate 3). In addition, in FIG. 1, illustration of a one part component of the package 1 mentioned later is abbreviate | omitted for convenience of explanation. This package 1 is obtained by stacking and packing a laminate 3 composed of a plurality of glass plates 4 stacked in a vertical posture (substantially vertical posture) on a pallet 2. Between the plurality of glass plates 4 included in the laminate 3, protective sheets (such as paper sheets and foamed resin sheets) (not shown) are interposed. The laminated body 3 is fixed (held) to the pallet 2 by two binding bands 5 wound around so as to surround the laminated body 3.

  In the package 1, the stack 3 is covered with the bag 6 from above, and the opening of the bag 6 located at the lower end of the bag 6 is provided on the pallet 2 by the tightening band 7. It is tightened around the band attachment portion 8. Thereby, the internal space of the bag 6 is sealed, and dust and the like are prevented from entering the internal space of the bag 6 and adhering to the laminate 3.

  As shown in FIG. 2, the pallet 2 supports from below the base portion 9 having an insertion opening 9a for inserting a fork of a forklift and the like, and the lower side 4a of each glass plate 4 included in the laminate 3 A plurality of (four in the present embodiment) support portions 10, a backrest portion 11 supporting the laminate 3 from the back side via a plate-like buffer material 11a, and an X direction of the laminate 3 A pair of holding plates 12, 12 for restricting the displacement in the direction in which the lower side portion 4a of the glass plate 4 extends), and a band attaching portion 8 for hooking and attaching the tightening band 7.

  The plurality of supports 10 are arranged in the X direction at intervals from each other. The plurality of support portions 10 are arranged so that the two right support portions 10 and the two left support portions 10 are laterally symmetrical when viewed from the Y direction (the direction in which the pallet 2 is viewed from the front). As a matter of course, the number of support portions 10 may be appropriately increased or decreased in accordance with the weight of the laminate 3 or the dimension of the laminate 3 (glass plate) along the X direction. Also, the arrangement of the support portion 10 may be changed. However, even when the number and arrangement of the support portions 10 are changed, it is preferable to arrange the plurality of support portions 10 in left-right symmetry as viewed from the Y direction.

  Each of the plurality of support portions 10 is formed in a rail shape extending in the Y direction in plan view. That is, the plurality of supports 10 extend in parallel to one another in plan view. Each support portion 10 includes a base 13 fixed to the base portion 9, an extendable portion 14 which is stacked above the base 13 and extends and contracts in the Z direction (vertical direction) according to a load applied, It has a sheet-like protection portion 15 stacked on the upper side of the portion 14 and in contact with the lower side 4 a of the glass plate 4. In addition, the upper surface of the protection part 15 turns into the support surface 15a which supports the lower side part 4a directly.

  The pedestal 13 is made of metal and is formed as an inclined surface whose upper surface (surface supporting the stretchable portion 14 from below) is inclined with respect to a horizontal surface.

  The stretchable portion 14 is made of a foamable resin formed in a rectangular shape, and in the present embodiment, is made of a polyethylene foam. The 25% compressive stress in the stretchable portion 14 is in the range of 200 kPa to 290 kPa. Here, as will be described in detail later, the expansion / contraction portion 14 is a support surface 15 a between the plurality of support portions 10 generated due to deformation such as twisting of the pallet 2 itself, wear of the support surface 15 a, etc. Have the function of absorbing the difference in height. In addition, the expansion-contraction part 14 can be attached and removed with respect to the base 13, and when it does not exhibit desired elasticity or is damaged, it replaces | exchanges with the new expansion-contraction part 14 (new article) It is possible. For example, the stretchable portion 14 is fixed by being attached to the pedestal 13 with an adhesive or a double-sided tape in order to facilitate replacement.

  Here, in the present embodiment, a polyethylene foam is employed as the stretchable portion 14, but as a modification of the present embodiment, a soft rubber, a foam rubber, a foamed plastic or the like may be employed as the stretchable portion 14. The foamed rubber and the foamed plastic may be open cells or closed cells.

  The protective portion 15 covers the entire width of the stretchable portion 14 in the X direction, and protects the stretchable portion 14 from the occurrence of a scratch due to contact with the glass plate 4 (contact with the lower side 4a). The support surface 15a formed by the protective portion 15 is an inclined surface which is inclined with respect to the horizontal surface. In the present embodiment, the protective portion 15 is made of a PE sheet (polyethylene sheet), and the hardness thereof is harder than the stretchable portion 14 and softer than the glass plate 4. Further, the protective portion 15 can be attached to and removed from the stretchable portion 14. As a result, when the protective portion 15 is damaged or glass powder or the like adheres to the protective portion 15, it is possible to replace the protective portion 15 with a new protective portion 15 (new). For example, the protective portion 15 is fixed by being attached to the stretchable portion 14 with an adhesive or a double-sided tape in order to facilitate replacement.

  Here, in the present embodiment, a polyethylene sheet is employed as the protective portion 15. However, as a modification of the present embodiment, hard rubber, a general purpose plastic, or the like may be employed as the protective portion 15.

  Between the plurality of support portions 10, the pedestals 13 described above, the extension portions 14 each other, and the protection portions 15 have the same configuration. As a result, in a state where the pallet 2 is not in use (in a state not used for packing the laminate 3 at all), the height positions of the support surfaces 15a become uniform among the plurality of support portions 10 There is.

  However, while the pallet 2 is repeatedly used, it is shown in FIG. 3 (a) due to twisting of the pallet 2 itself, wear of the support surface 15a due to sliding with the glass plate 4 (lower side 4a), etc. Thus, the height position of the support surface 15a may be uneven (in the figure, the case where the pallet 2 itself is uneven due to twisting is illustrated). The pallet 2 can cope with such a problem as follows.

  That is, when the glass plate 4 (laminated body 3) is loaded on the pallet 2, the glass plate 4 (laminated body 3) in the supporting portion 10 where the supporting surface 15 a is relatively high among the plurality of supporting portions 10. The expansion and contraction part 14 is contracted by the load applied from the), and the support surface 15a is sunk downward along with this. As a result, the relatively high supporting surface 15a is lowered to the same height as the relatively low supporting surface 15a. Thus, the height positions of the support surfaces 15a are aligned. That is, the expansion-contraction part 14 absorbs the height difference of the support surface 15a between the some support parts 10, as shown in FIG.3 (b).

  As described above, since the height position of the support surface 15a is prevented from being uneven, in the present pallet 2, the number (here, three) is unduly smaller than the original number (here, four). It is avoided that the lower side 4a of the glass plate 4 is supported by the support 10 below). As a result, it is possible to reduce the occurrence of a situation where an excessive load (stress) is locally applied to the lower side portion 4a and the glass plate 4 is broken.

  Each of the pair of holding plates 12 shown in FIG. 2 is capable of adjusting the position in the X direction according to the length along the X direction of the laminate 3 loaded on the pallet 2. For adjusting the position of each pressing plate 12, for example, the feed operation of the pressing plate 12 by a ball screw mechanism is used. In FIG. 2, a mechanism for adjusting the position of each pressing plate 12 is not shown.

  The band attachment portion 8 is installed on the base portion 9 so as to surround an area on which the stacked body 3 is loaded in a plan view (as viewed in the Z direction). The band attachment portion 8 has a polygonal (in the present embodiment, an octagonal) contour in a plan view. Moreover, the band attachment part 8 has a groove-shaped cross section turned over. A tightening band 7 is wound and attached along the bottom of the groove, and the opening of the bag 6 sandwiched between the tightening band 7 and the bottom of the groove is tightened.

  From the viewpoint of absorbing the maximum height difference that may occur between the plurality of support surfaces 15a, the thickness of the stretchable portion 14 (equal to the distance between the pedestal 13 and the protective portion 15) is in a state where no load is applied ( When the glass plate 4 is not loaded, it is preferable to make the difference larger than the maximum height difference. Specifically, the thickness of the stretchable portion 14 is preferably 5 mm or more, and more preferably 10 mm or more. On the other hand, from the viewpoint of preventing lateral displacement of the laminate 3, the thickness of the stretchable portion 14 is preferably 25 mm or less, and more preferably 20 mm or less.

  The number of glass plates 4 loaded on the pallet 2 (the number of glass plates included in the laminate 3) can be, for example, 100 to 300. The dimensions of the glass plate can be, for example, 600 mm to 2500 mm on one side, and the thickness of the glass plate can be, for example, 0.3 mm to 3.2 mm.

  In order to verify the effect according to the present invention, as an example, using the pallet 2 described in the above first embodiment, the package 1 in which the glass plate 4 (laminated body 3) is stacked and packaged on the pallet 2 Made. After the package 1 was transported by a truck and a trailer, the breakage rate of the glass plate 4 starting from the lower side 4 a of the package 1 was determined.

  In the example, as the stretchable part 14 (polyethylene foam) provided in the support part 10, one having dimensions of width x length x thickness of 60 mm x 450 mm x 15 mm was used. The 25% compressive stress value in the stretchable portion 14 was 275 kPa.

  In addition, as a comparative example, a package 1 is manufactured using a pallet 2 which is different from the example only in that the stretchable portion 14 is replaced with a hard wear resistant hard rubber (polybutadiene rubber main body), and this packing The breakage rate of the glass plate 4 starting from the lower side 4 a of the body 1 was determined. The conditions for loading the glass plate 4 on the pallet 2 were the same as in the example. Moreover, it was estimated that 25% compression stress of hard rubber was unmeasurable, and greatly exceeded 300 kPa.

  As a result of verification, while the breakage rate of the glass plate 4 in the comparative example was 14 ppm, the breakage rate of the glass plate 4 in the example is 0.5 ppm, and the breakage rate is significantly suppressed with respect to the comparative example. It turned out that it was. In the embodiment, when the glass plate 4 is loaded, the factor that such an effect is obtained is because the height difference of the support surface 15a is absorbed among the plurality of support portions 10 as the expansion and contraction portions 14 expand and contract. It is assumed that On the other hand, in the comparative example, it is assumed that absorption of the height difference of the support surface 15a has failed.

  From the above, according to the present invention, it is possible to reduce the breakage of the glass plate 4 packaged in a mode in which the lower side portion 4a of the glass plate 4 in the vertical orientation is supported from below by the plurality of support portions 10. It is inferred.

Second Embodiment
The second embodiment will be described below. In the description of the second embodiment, elements substantially the same as the elements described in the first embodiment above are denoted by the same reference numerals in the drawings referred to in the description of the second embodiment. The description thereof will be omitted, and only differences from the first embodiment will be described.

  As shown in FIG. 4 and FIGS. 5 (a) and 5 (b), the packaging body 1 according to the second embodiment is different from the first embodiment described above in that the backrest 11 has a plurality of In the present embodiment, each of the four back support portions 16 has a lateral expansion and contraction portion 17 which expands and contracts in the Y direction (the lateral direction and the front and rear direction of the pallet 2) according to the load applied. It is a point provided with the receiving plate 18 instead of the shock absorbing material 11a.

  The plurality of back surface support portions 16 support the glass plate 4 included in the laminate 3 from the back surface 4 b side. Each back support portion 16 has a back support surface 16 a that supports the back surface 4 b of the glass plate 4 via the receiving plate 18. In the present embodiment, the front of the lateral expansion and contraction portion 17 forms a back support surface 16 a.

  The plurality of back support portions 16 are arranged in the X direction at intervals from each other. The plurality of back support portions 16 are arranged so that the two right back support portions 16 and the two left back support portions 16 are laterally symmetrical when viewed from the Z direction. The back support 16 may have its number increased or decreased as appropriate, or its arrangement may be changed. However, even in the case of changing the number and the arrangement, it is preferable that the arrangement of the plurality of back surface support portions 16 be symmetrical in the Z direction.

  Each of the plurality of back support portions 16 is formed in a rod shape extending in the Z direction. The plurality of back supports 16 extend parallel to one another. Each back support portion 16 is composed of a base portion 19 and a lateral stretchable portion 17 superimposed on the front side of the base portion 19.

  The base portion 19 is made of metal and is formed as an inclined surface whose front surface (surface supporting the lateral expansion and contraction portion 17 from the rear surface side) is inclined with respect to the vertical surface.

  The lateral expansion and contraction portion 17 is made of a foamable resin formed in a rectangular parallelepiped shape, and is formed of a polyethylene foam in the present embodiment. The 25% compressive stress in the lateral expansion and contraction portion 17 is in the range of 200 kPa to 290 kPa. Here, the lateral expansion and contraction portion 17 is a back support surface 16 a between the plurality of back support portions 16 which are generated due to the twisting deformation of the pallet 2 itself, abrasion of the back support surface 16 a, etc. Have the function of absorbing the difference in height. The lateral expansion and contraction portion 17 can be attached to and removed from the base portion 19, and can be replaced with a new lateral expansion and contraction portion 17. The lateral expansion and contraction portion 17 is affixed and fixed to the base portion 19 with, for example, an adhesive or a double-sided tape.

  From the viewpoint of absorbing the maximum height difference that may occur between the plurality of back support surfaces 16a, the thickness of the lateral expansion and contraction portion 17 (equal to the distance between the base portion 19 and the receiving plate 18) In the absence state, it is preferable to make it larger than the above-mentioned maximum height difference. Specifically, the thickness of the lateral expansion and contraction portion 17 is preferably 5 mm or more, and more preferably 10 mm or more. On the other hand, from the viewpoint of preventing lateral displacement of the laminate 3, the thickness of the lateral expansion and contraction part 17 is preferably 25 mm or less, and more preferably 20 mm or less.

  Here, as the lateral expansion and contraction portion 17, other than polyethylene foam, soft rubber, foam rubber, foam plastic or the like may be adopted. The foamed rubber and the foamed plastic may be open cells or closed cells.

  The receiving plate 18 is formed in a thickness that can impart flexibility. Thus, the receiving plate 18 can be bent and deformed according to the force applied to it. The receiving plate 18 is installed so as to be bridged over the plurality of back surface support portions 16. The front surface of the receiving plate 18 (the surface supporting the back surface 4b of the glass plate 4) is an inclined surface that is inclined with respect to the vertical surface. The backing plate 18 is harder than the lateral expansion and contraction portion 17 and softer than the glass plate 4. Also, the receiving plate 18 can be attached to and removed from the lateral expansion and contraction portion 17, and can be replaced with a new receiving plate 18. The receiving plate 18 may be affixed and fixed to the lateral expansion and contraction portion 17 with, for example, an adhesive or a double-sided tape, or may be mounted without being fixed.

  When the pallet 2 is not in use, the height position of the back support surface 16a among the plurality of back support parts 16 is different from the state in which the pallet 2 illustrated in FIG. (Horizontal position) is aligned. Here, when not in use, the height positions of the plurality of back support surfaces 16 a are aligned on the two-dot chain line shown in FIG. In this pallet 2, even if the height position of the back surface 16a becomes uneven as shown in the figure with repeated use of the pallet 2, the following correspondence can be made.

  That is, when the glass plate 4 is loaded on the pallet 2, the load from the glass plate 4 is applied to the back support portion 16 having the back support surface 16 a relatively on the front side of the pallet 2 among the plurality of back support portions 16. The lateral expansion and contraction portion 17 is contracted by the applied load, and the back support surface 16a is moved to the rear side of the pallet 2 accordingly. As a result, the back support surface 16a that is relatively on the front side moves to the same position as the back support surface 16a that is relatively on the back side. Thus, the height positions of the back support surfaces 16a are aligned. That is, as shown in FIG. 5 (b), the lateral expansion and contraction portion 17 absorbs the height difference of the back surface 16 a between the plurality of back surface support portions 16.

  As described above, the height position of the back support surface 16 a is prevented from becoming uneven. Therefore, in the present pallet 2, even if the pallet 2 vibrates during transportation, the occurrence of a situation where an excessive load is locally applied to the glass plate 4 and is broken can be reduced. In addition, since the height position of the back support surface 16a is aligned, the possibility of a gap between the back support surface 16a and the receiving plate 18 can be eliminated, so that the protective sheet can be accurately prevented from being caught in the gap.

DESCRIPTION OF SYMBOLS 1 Glass plate package 2 Pallet for glass plate packing 4 Glass plate 4 a Lower side 4 b Back surface 10 Support portion 14 Stretchable portion 15 Protective portion 15 a Support surface 16 Back surface support portion 16 a Back surface support surface 17 Horizontal stretch portion 18 Support plate

Claims (9)

It has a plurality of supports that support from below the lower side of the glass sheet loaded in the vertical position,
It is a pallet for glass plate packing in which the support surface which contact | abuts the lower side part of the said glass plate in each of these support parts was formed,
Each of the plurality of support portions has an expansion and contraction portion that expands and contracts in the vertical direction according to the load applied,
A pallet for packing a glass sheet, which is configured to absorb a difference in height of the support surface among the plurality of support parts as the expansion and contraction parts expand and contract when the glass sheets are loaded.   The pallet for glass plate packing according to claim 1, wherein the 25% compression stress in the expansion and contraction part is in the range of 200 kPa to 290 kPa.   The said elastic part consists of foamable resin, The pallet for glass plate packing of Claim 1 or 2 characterized by the above-mentioned. Each of the plurality of support portions has a sheet-like protection portion which is stacked above the stretchable portion and which forms the support surface,
The pallet for glass plate packing according to any one of claims 1 to 3, wherein the protective portion is attachable to and detachable from the stretchable portion. It has a plurality of back support parts which support the glass plate from the back side,
Each of the plurality of back support portions has a back support surface that supports the back surface of the glass plate, and a lateral expansion and contraction portion that expands and contracts in a lateral direction according to a load applied.
At the time of loading of the glass plate, it is configured to absorb a height difference of the back support surface among the plurality of back support portions in accordance with expansion and contraction of the lateral expansion and contraction portion. The pallet for glass plate packing in any one of -4.   The pallet for glass plate packing according to claim 5, wherein 25% compression stress in said horizontal expansion and contraction part is within the range of 200 kPa-290 kPa.   The said horizontal expansion-contraction part consists of foamable resin, The pallet for glass plate packing of Claim 5 or 6 characterized by the above-mentioned.   The pallet for glass plate packing according to any one of claims 5 to 7, further comprising a receiving plate interposed between the back surface of the glass plate loaded in the vertical posture and the plurality of back support portions. .   The glass plate package provided with the pallet for glass plate packing in any one of Claims 1-8, and the glass plate loaded by this pallet for glass plate packing.