JP4597495B2 - Glass plate packing unit - Google Patents

Description

The present invention relates to a technique for relates to a glass plate packaging unit, in particular a plurality of glass plates by interposing a protective sheet between the mutually packed.

  As is well known, glass plates used for manufacturing glass panels for various image display devices such as liquid crystal displays, plasma displays, electroluminescence displays, field emission displays, etc., as well as substrates for forming various electronic display functional elements and thin films. A glass plate or the like used as a material is usually conveyed as a packing unit from a glass maker or the like to a display maker or the like in a state where a plurality of sheets are stored and held as a group.

  In addition, for example, in manufacturing the above-described various image display devices and the like, a technique in which a plurality of glass panels are created from a single glass sheet has been adopted, and the glass manufacturers are molded and processed accordingly. The current situation is that large glass is being promoted. More specifically, for example, when manufacturing a glass panel of a liquid crystal display, a multi-system in which a large number of glass panels are formed in a large plate glass is employed for the purpose of reducing manufacturing cost and improving production efficiency (throughput). Therefore, attempts have been made to make the raw glass produced by glass manufacturers as large as possible, or they have been put to practical use.

  Specifically, in the initial stage of practical mass production, the size of the base glass was about 300 × 400 mm, but after that, with the increase in the number of glass panels taken, the size of 370 × 470 mm, 550 × 650 mm The size of the glass plate has increased to 680 × 680 mm size, 1000 × 1200 mm size, etc., and currently, a glass plate of 1500 × 1850 mm size (thickness of about 0.7 mm) has been produced.

In this case, the glass plates listed above and the glass plates according to them are actually thin and easy to break with such large plates, and the packaging is strictly Need to do. And when packing this kind of glass plate, as described in the following Patent Documents 1 and 2, using a protective pad for buffering or a separating member, a plurality of glass plates are arranged at regular intervals. It was customary to pack them in a vertical orientation or a substantially vertical orientation and arranged in parallel. In addition, according to the following Patent Document 3, a packaging technique in which a plurality of glass plates are stored in a stacked manner in a horizontal posture in a pallet whose bottom surface, top surface, and four side surfaces are all configured by a frame. Is disclosed.
JP-A-5-319456 JP 2000-203679 A JP 2000-191666 A

  By the way, as disclosed in the above-mentioned Patent Documents 1 and 2, if the glass plates are arranged in parallel in a vertical posture and packed, the above-described increase in the size of the glass plate and the increase in weight due to this increase. Along with this, there is a risk that the glass plate itself will be unduly bent and deformed by its own weight, and the cushioning material etc. receiving the lower end of the glass plate will be unjustly compressed and exhibit a cushion function or an impact mitigation function. become unable. For this reason, not only the probability of occurrence of breakage of the glass plate due to vibrations during transportation, etc. increases, but also the buffer material etc. may deteriorate early and become difficult to use repeatedly, which is disadvantageous in terms of cost. .

  In order to deal with such a problem, as disclosed in Patent Document 3 above, it is only necessary to mount a plurality of glass plates in a stacked manner in a horizontal posture inside the pallet. Since the pallet disclosed in the same document is composed of a frame around the entire periphery, the glass plate is in a state of being largely open to the external space. For this reason, a foreign matter such as dust or dust existing in the external space enters the inside of the pallet and is sandwiched between the glass plates. And when each glass plate moves relatively by carrying this pallet, the glass plate and the foreign material are rubbed, resulting in defects such as scratches on the surface of the glass plate. Invite.

  In addition, since this pallet is a final structure for packing, there is a problem that a packing unit that further includes these pallets cannot be manufactured by stacking a plurality of such pallets. For this reason, even when packing and transporting a large number of glass plates, all the glass plates must be stored in a single pallet, and a very large weight acts on the glass plate at the bottom. There is a possibility that the glass plate near the lowermost part and the vicinity thereof may be damaged. Moreover, since it is inevitable that the size of the pallet increases and the total weight increases with the increase in the size of the glass plate, the pallet is handled during packaging and when the glass plate is taken out after transporting. There arises a problem that the handling becomes extremely difficult.

  In addition, in the same document, there is no disclosure of the configuration between the glass plates. For this reason, if it is assumed that a spacing member is interposed between the glass plates, In order to appropriately prevent the relative movement between the glass plates and the occurrence of scratches on the glass plate due to foreign matter, what kind of spacing member is optimal is a problem.

  The present invention has been made in view of the above circumstances, and after avoiding problems caused by packaging each glass plate arranged in a vertical position, the size of the packaging body with the increase in the size of the glass plate or It is a technical problem to be able to appropriately cope with the increase in weight and the difficulty of handling due to this, and to appropriately deal with the relative movement between each glass plate and the occurrence of scratches on the glass plate due to foreign matter. To do.

A glass plate packaging unit according to the present invention made to solve the above technical problem is a box body having four side walls and a bottom wall that cover at least the entire surface or substantially the entire surface of each of the four sides and the bottom. In the internal storage space, a plurality of glass plates are brought into contact with each other over the entire surface or substantially the entire surface of the glass plate, and the width direction dimension and the depth direction dimension are set to be longer than the glass plate so that the thickness is increased. A unit package comprising a foamed resin sheet having a foaming ratio of 0.3 to 5.0 mm and a foaming ratio of 10 to 40 , and being stored in a stacked manner in a horizontal posture, the width of the internal storage space of the box and wherein each of the dimension and the depth dimension, with the foamed resin sheet in the width direction dimension and the depth dimension the same as or the rewritable set substantially equal, the outer enclosure covering the periphery of the unit pack To do.

In this case, the box may have an upper wall portion covering the entire upper surface or substantially the entire surface in addition to the four side wall portions and the bottom wall portion. Further, the outer enclosure may be in the form of a box, or the portion corresponding to the four side wall portions of the box may be formed of a stretch film or the like. Furthermore, the number of unit packing bodies covered by the outer envelope body may be one or plural .

According to such a configuration, since each glass plate is stored in a horizontal posture in the internal storage space of the box body, the glass plate is accompanied with a problem caused by the storage of each glass plate in a vertical posture, that is, as the size of the plate increases. It is possible to avoid problems such as the plate itself undergoing unreasonable bending deformation or the like due to its own weight, or the shock-absorbing function being hindered by an inappropriate compression deformation or the like of the buffer material supporting the lower end of the glass plate. Further, since the box body is covered at least on the entire surface or substantially the entire surface of the four side portions and the bottom portion with the four side wall portions and the bottom wall portion, each glass plate housed in the box is appropriately It is in a state of being blocked from the external space (substantially completely when the upper wall portion is provided), so that foreign matters such as dust and dust existing in the external space are sandwiched between the glass plate and the foamed resin sheet. Probability is greatly reduced. Thereby, even if it is a case where a glass plate moves relatively with respect to a foamed resin sheet at the time of conveyance etc., malfunctions, such as a surface being damaged by a foreign material, are avoided effectively. Moreover, in the internal storage space of the box, a plurality of glass plates that are housed in a stacked manner in a horizontal posture with a foamed resin sheet interposed between them is a unit package that should be covered by the outer enclosure Since it is a body and not a final structure for packing, when a large number of glass plates are packed, it can be divided into a plurality of unit packing bodies and stored. Thereby, the situation where an unreasonably big weight acts on the glass plate which exists in the lowest part of a unit package, the situation where the glass plate breaks down resulting from this, etc. are avoided effectively. . Further, the foamed resin sheet interposed between each of the plurality of glass plates is in contact with the entire surface or substantially the entire surface of the glass plate, and has a width direction dimension and a depth direction dimension rather than the glass plate. Since it is set to be long, it can be in a state of protruding from the entire outer peripheral edge of the glass plate to the outer peripheral side, thereby protecting each glass plate appropriately. In addition, since the foaming ratio of the foamed resin sheet is 10 to 40 times, it is possible to avoid a situation such as tearing while ensuring an appropriate cushioning property for the glass plate of the foamed resin sheet. . That is, when the foaming ratio of the foamed resin sheet is less than 10 times, the foamed resin sheet becomes too hard, so that the required cushioning property cannot be obtained, and the glass plate cannot be sufficiently protected. On the other hand, when the expansion ratio of the foamed resin sheet exceeds 40 times, the foamed resin sheet becomes too soft, and it is easy to be broken and difficult to handle during the storing operation. Therefore, if the expansion ratio of the foamed resin sheet is within the above numerical range, such a problem does not occur. In this case, the more preferable expansion ratio of the foamed resin sheet is 20 to 30 times. Further, since the thickness of the foamed resin sheet is 0.3 to 5.0 mm, when a plurality of glass plates are stored in the box body in a horizontal posture with the foamed resin sheets interposed therebetween. In addition, it is possible to prevent the glass plate from being unduly bulky in the vertical direction after sufficient protection of the glass plate and the like is achieved. That is, if the thickness of the foamed resin sheet is less than 0.3 mm, the cushioning function and the buffering function that the foamed resin sheet originally has cannot be sufficiently exhibited, and the protection of the glass plate is hindered. In addition, since the foamed resin sheet is too thin, tearing is likely to occur, and handling during storage operations becomes difficult. On the other hand, when the thickness of the foamed resin sheet exceeds 5.0 mm, even if the number of laminated glass plates is not so large, it becomes unreasonably bulky in the vertical direction, making it impossible to make the box reasonably shallow, There is a waste in terms of cost. Therefore, if the thickness of the foamed resin sheet is within the above numerical range, such a problem does not occur. In this case, the more preferable thickness of the foamed resin sheet is 0.5 to 2.0 mm. Moreover, since the widthwise dimension and the depthwise dimension of the internal storage space of the box are set to be the same or substantially the same as the widthwise dimension and the depthwise dimension of the foamed resin sheet, a plurality of glass plates are attached to each other. When a foamed resin sheet is interposed between the foamed resin sheets and stored in a horizontal position inside the box, the outer peripheral edge of each foamed resin sheet is in contact with or substantially in contact with the inner surface of the four sides of the box. It is possible to prevent the sheet from being displaced in the horizontal direction inside the box.

  In the above-described configuration, it is preferable that the unit package is stored in a plurality of layers in the vertical direction inside the outer enclosure.

  In this way, a sufficient number of glass plates can be stored in one packing unit even if the depth of each box is reduced. Therefore, it is possible to reliably prevent a large weight from acting on the glass plate existing at the lowermost part of each box, and it is possible to effectively reduce the weight of each unit package, and at the time of packing work or after transport The handling of the unit package at the time of taking out the glass plate becomes simple and easy.

Incidentally, it foamed resin sheet, in preventing adhesion of dirt when in contact with the surface of the glass plate, it is preferable not containing an antistatic agent. However, even if the material itself contains a foamed resin sheet containing an antistatic agent (for example, a polymer type antistatic agent) or a surfactant without using a surfactant, a high molecular weight type surfactant is used. Since the foamed resin sheet using the agent hardly causes a problem of adhesion of dirt when contacting the surface of the glass plate, these foamed resin sheets can be used as a protective sheet material. In addition, since the foamed resin sheet using a low molecular weight type surfactant has a lot of dirt when it comes into contact with the surface of the glass plate, avoid using this foamed resin sheet as a protective sheet material. Be wise.

On the other hand, as a glass plate packing method, a plurality of glass plates are brought into contact with each other over the entire surface or substantially the entire surface of the glass plate in the internal storage space of the box, and the dimensions in the width direction than the glass plate and The above-mentioned box, which is stored in a stacked manner in a horizontal posture with a foamed resin sheet having a depth dimension set to be long, a thickness of 0.3 to 5.0 mm, and a foaming ratio of 10 to 40 times A first step of manufacturing a unit package by setting a width direction dimension and a depth direction dimension of the internal storage space of the body to be the same as or substantially the same as the width direction dimension and the depth direction dimension of the foamed resin sheet, and the unit A second step of producing a package unit by storing the package body inside the outer enclosure, and after the first step is executed in the clean room, the second step is executed outside the clean room. But It is suitable.

According to such a configuration, the operation of storing the glass plate (glass plate stored in the clean room after cleaning) and the foamed resin sheet in the internal storage space of the box in the clean room is performed. During the storing operation, foreign matter such as dust and dust, particularly foreign matter that causes a problem, is not caused between the glass plate and the foamed resin sheet. In addition, the foamed resin sheet is in contact with the entire surface or substantially the entire surface of the glass plate, and the width direction dimension and the depth direction dimension are set to be longer than the glass plate. Since each glass plate is in close contact with each foamed resin sheet and is prevented from moving in the horizontal direction due to its adhesion, the glass plate is appropriately protected. It is done. In addition, the expansion ratio of the foamed resin sheet are the 10 to 40 times, while ensuring a proper cushioning property and the like to the glass plate of the foamed resin sheet, in a state of being avoided such tear occurs In addition, since the thickness of the foamed resin sheet is 0.3 to 5.0 mm, it is avoided that the glass plate is unduly bulky with respect to the vertical direction after sufficient protection of the glass plate is made. And since the width direction dimension and the depth direction dimension of the internal storage space of the box are respectively set to be the same or substantially the same as the width direction dimension and the depth direction dimension of the foam resin sheet, each foam resin sheet is It is stored in a state in which the occurrence of positional displacement in the horizontal direction is suppressed inside . At the time when the unit package is manufactured after completing this storing operation, each glass plate and each foamed resin sheet are in intimate contact with each other, and thereafter, the probability of foreign matter being sandwiched between them is extremely low. ing. Therefore, even if the unit package is carried out of the clean room and the unit package is stored inside the outer enclosure outside the clean room, the above-mentioned problem of foreign matter is hardly caused. It will be. Since the outer enclosure is not brought into the clean room, it is possible to use a dust or dust generating material as the outer enclosure, and the material and structure of the outer enclosure can be selected. As the degree of freedom increases, the cleanliness is not subject to severe restrictions. Therefore, if the box of the unit package is carefully cleaned, the glass plate can be maintained in a clean state without much careful cleaning of the outer enclosure, and the cleaning operation is moderate. Labor saving is achieved.

As described above, according to the glass plate packaging unit according to the present invention, each glass plate is stored in a horizontal posture in the internal storage space of the box, and therefore unreasonable due to each glass plate being stored in a vertical posture. Inconveniences such as bending deformation and impact relaxation inhibition occurring at the lower end support portion of the glass plate are avoided. In addition, since the box body is covered with the four side walls and the bottom wall at least the entire surface of each of the four side portions and the bottom portion, the foreign matter such as dust and dust existing in the external space is removed. probability is sandwiched between the glass plates and the foamed resin sheet is greatly reduced, defects such as scratches on the surface of the glass plate can be effectively avoided. Furthermore, since the unit package is covered by the outer enclosure, when packing a large number of glass plates, the unit package can be divided into a plurality of unit packages and stored, and the lowermost glass plate of the unit package It is possible to prevent an excessively large weight from acting on the surface. Further, the foamed resin sheet is interposed between the mutual plural glass sheets is in contact over the entire surface or substantially the entire surface of the glass plate, and the width dimension and depth dimension than the glass plate Since it is set to be long, it can be in a state of protruding from the entire outer peripheral edge of the glass plate to the outer peripheral side, thereby making it possible to appropriately protect each glass plate. In addition, since the foaming ratio of the foamed resin sheet is 10 to 40 times, it is possible to avoid a situation such as tearing while ensuring an appropriate cushioning property for the glass plate of the foamed resin sheet. .

  And if the unit packing body is stacked and stored in multiple layers in the outer enclosure, even if the depth of each box is reduced, a sufficient number of glass plates are placed in one packing unit. Thus, the individual unit package can be reduced in weight and size, and the unit package can be easily and easily handled during the packing operation and when the glass plate is taken out after transporting.

Furthermore, since the protective sheet material interposed between the glass plates is a foamed resin sheet , a good cushioning property can be obtained as compared with paper or a resin film, and the surface of the glass plate can be obtained. Since the adhesiveness is higher than that of paper such as interleaving paper, the glass plate is difficult to slide with respect to the foamed resin sheet, and the probability of relative movement between the two becomes extremely low. In addition, since this foamed resin sheet does not generate dust or dust, it can be stored in a clean room, and foreign substances such as dust and dust can be prevented from entering the box as much as possible. Become .

Then, avoiding the thickness of the foamed resin sheet, because the in the range of 0.3Mm～5.0Mm, in terms of sufficient protection of the glass plate is made, and the like to become unduly bulky with respect to the vertical direction It becomes possible to do .

Further, since the width direction dimension and the depth direction dimension of the internal storage space of the box and the foamed resin sheet are set to be the same or substantially the same, the outer peripheral edge of the foamed resin sheet is in contact with or substantially the four inner surfaces of the box. Since it can be in a contact state, it is effectively avoided that the outer peripheral edge of each glass plate contacts or collides with the inner surface of the four side portions of the box during transportation, and appropriate protection of the glass plate is made. .

In addition, according to the glass plate packing method exemplified above, the first step of storing the glass plate and the foamed resin sheet in the internal storage space of the box in the clean room is executed. A situation in which foreign matter such as dust, particularly foreign matter in question, is sandwiched between the glass plate and the foamed resin sheet does not occur. Furthermore, the foamed resin sheet is in contact with the entire surface or substantially the entire surface of the glass plate, and the width direction dimension and the depth direction size are set to be longer than the glass plate. Since each glass plate is in close contact with each foamed resin sheet and is prevented from moving in the horizontal direction due to its adhesion, the glass plate is appropriately protected. It is done. In addition, since the foaming ratio of the foamed resin sheet is 10 to 40 times, the foamed resin sheet is in a state in which an appropriate cushioning property or the like for the glass plate of the foamed resin sheet is secured and a situation such as tearing is avoided. In addition, since the thickness of the foamed resin sheet is 0.3 to 5.0 mm, it is avoided that the glass plate is unduly bulky with respect to the vertical direction after sufficient protection of the glass plate is made. And since the width direction dimension and the depth direction dimension of the internal storage space of the box are respectively set to be the same or substantially the same as the width direction dimension and the depth direction dimension of the foam resin sheet, each foam resin sheet is It is stored in a state in which the occurrence of positional displacement in the horizontal direction is suppressed inside . In addition, since the second step of storing the unit package inside the outer enclosure is executed outside the clean room, it is possible to use a dust or dust generating substance as the outer enclosure. The degree of freedom of selection regarding the material and structure of the outer enclosure is increased, and the cleanliness is not subject to severe restrictions.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view schematically showing an overall configuration of a glass plate packaging unit (hereinafter simply referred to as a packaging unit) according to an embodiment of the present invention, and FIG. 2 is a unit packaging body that is a component of the packaging unit. FIG. 3 is a perspective view of an exploded view of the entire packaging unit, FIG. 4 is a front elevation view of the packaging unit, and FIG. 5 is a perspective view of the packaging unit. FIG. 6 is an enlarged vertical front view of a main part of a unit package that is a component of the packing unit.

  As shown in FIG. 1, a packaging unit 1 according to this embodiment includes unit packaging bodies 2 stacked in a plurality of stages (for example, 10 to 50 stages) in the top and bottom, and a box that covers the periphery of these unit packaging bodies 2. The outer envelope body 3 is fixed to the upper surface of the pallet 4 serving as a base. In addition, this outer enclosure 3 can also be comprised with the stretch film wound around the unit package 2 stacked in multiple steps.

  As shown in FIG. 2, the unit package 2 includes a box 5 having four side walls 5 a that cover the entire surface of the four sides and a bottom wall 5 b that covers the entire surface of the bottom. In the space 6, the foamed resin sheet 7 as a protective sheet material and the glass plate 8 are stored in a stacked manner in a horizontal posture in order from below, and the uppermost portion is used as the foamed resin sheet 7, and then the entire upper surface thereof. Is covered with an upper wall portion 5c made of a buffer plate material.

  More specifically, as shown in FIG. 3, the outer enclosure 3 has four sides of a reinforcing frame assembly 3a made of metal (aluminum, aluminum alloy, steel, etc., hereinafter referred to as metal). Four side plates 3b and a bottom plate 3c are attached to the inner surface of the portion and the inner surface of the bottom portion, respectively, and the entire surface of the four side portions and the entire surface of the bottom portion are covered by these side plates 3b and the bottom plate 3c. In this case, the four side plates 3b and the bottom plate 3c are made of resin, and the bottom plate 3c may also be used as the top plate of the pallet 4 without being separately attached. In addition, the side plate 3b located in front of the four side plates 3b can be removed outward. As shown in FIGS. 4 and 5, the entire upper portion of the outer enclosure 3 is covered with an upper lid plate 3d made of resin.

  On the other hand, as shown in FIGS. 3 and 6, the box 5 constituting the unit packaging body 2 has a rectangular frame-shaped metal reinforcing frame 5w, and the reinforcing frame 5w is an outer frame member. An inner frame member 5y is fixed to the lower inner surface of 5x. Of these, the outer frame member 5x constitutes the four side wall portions 5a, and the inner frame member 5y and the bottom covering plate 5z fixed to the upper surface thereof are the bottom wall portion. 5b. A reinforcing bar positioned on the lower surface of the bottom covering plate 5z is fixed to the reinforcing frame 5w. The bottom covering plate 5z is made of a thin metal plate, a resin plate, or a composite plate of resin and metal.

  A bottom buffer plate 5e is laid on the top surface of the bottom covering plate 5z of the box 5, the foamed resin sheet 7 and the glass plate 8 are stacked in a plurality of stages on the top surface, and the top wall is further formed on the top surface. The upper lid buffer plate 5f as the portion 5c is placed, and thereby the unit package 2 is configured. As shown in FIGS. 3 to 5, the unit package 2 is stacked in a plurality of stages on the bottom plate 3 c of the outer enclosure 3, and the uppermost portion thereof is covered with the upper cover plate 3 d of the outer enclosure 3. A packaging unit 1 is configured.

  In this embodiment, the glass plate 8 is a base plate glass for a liquid crystal display having a width direction dimension of 1500 mm, a depth direction dimension of 1850 mm, and a thickness of 0.7 mm. The foamed resin sheet 7 is a foamed polyethylene sheet (trade name: Miramat) manufactured by Nippon Styrene Paper Co., Ltd. having a thickness of 0.5 mm to 1.0 mm and an expansion ratio of 20 to 25, and has a width-direction dimension. It is 1550 mm and the dimension in the depth direction is 1900 mm. And the inner surface of the four side wall parts 5a of the box 5 in the unit package 2 has a width direction dimension of 1550 mm and a depth direction dimension of 1900 mm, and has the same dimensions as the foamed resin sheet 7. In this case, in the unit package 2, since the glass plate 8 is placed on the central portion of the foamed resin sheet 7, the foamed resin sheet 7 protrudes by about 25 mm from the entire outer periphery of the glass plate 8. It has become.

  The packaging unit 1 having the above configuration is manufactured as follows. That is, as shown in FIG. 7, the glass plate 8 conveyed by the conveyor 10 in the clean room 9 and the foamed resin sheet 7 that is also placed in the clean room 9 in a laminated manner are, for example, vacuumed. In the state where the foamed resin sheet 7 is stacked and placed on the upper surface of the single glass plate 8, it is sequentially stacked in a horizontal posture in the internal storage space 6 of the box 5. Then, when the glass plate 8 of about 5 to 20, preferably about 10, is stored in the box 5, the upper lid buffer plate 5f is placed on the upper end portion of the unit package 2 to complete the production. The manufactured unit package 2 is carried out of the clean room 9 from the next to the next.

  In this way, the unit packaging bodies 2 sequentially carried out to the outside of the clean room 9 are stacked in the horizontal posture in order from the bottom inside the outer enclosure 3 that is in a standby state outside the clean room 9. At this time, the side plate 3b on the front surface of the outer enclosure 3 is in a removed state, and therefore the unit package 2 is stacked inside using the front opening of the outer enclosure 3. 4 and 5, when the unit package 2 is stacked in about 30 stages, the side unit 3b is fitted and fixed to the front opening of the outer enclosure 3 to fix the unit 1 Is completed.

  The packaging unit 1 manufactured in this way is transported from the site to, for example, a display manufacturing factory or the like with the glass plate 8 maintained in a horizontal posture. In this case, in the packing unit 1, the box 5 and the outer enclosure 3 are used as returnable boxes, but the other items are not returned once transported.

It is a schematic perspective view which shows typically the whole structure of the glass plate packing unit which concerns on embodiment of this invention. It is a components disassembled arrangement perspective view which shows typically a unit packing object which is a component of a glass plate packing unit concerning an embodiment of the present invention. It is a component disassembled arrangement perspective view which shows the whole schematic structure of the glass plate packing unit which concerns on embodiment of this invention. It is a vertical front view which shows the whole structure of the glass plate packing unit which concerns on embodiment of this invention. It is a vertical side view which shows the whole structure of the glass plate packing unit which concerns on embodiment of this invention. It is a principal part expansion vertical front view of the unit package which is a component of the glass plate packing unit which concerns on embodiment of this invention. It is a schematic perspective view which shows the manufacture condition of the unit package which is a component of the glass plate packing unit which concerns on embodiment of this invention.

Explanation of symbols

1 Packing unit (glass plate packing unit)
2 Unit package 3 Outer enclosure 5 Box
5a Side wall
5b Bottom wall 6 Internal storage space 7 Foamed resin sheet 8 Glass plate 9 Clean room

Claims (2)

  In the internal storage space of the box having four side walls and a bottom wall that cover at least the entire surface of each of the four sides and the bottom, or a plurality of glass plates between each other, A foamed resin sheet that is in contact with substantially the entire surface and has a width-wise dimension and a depth-wise dimension set to be longer than the glass plate, a thickness of 0.3 to 5.0 mm, and a foaming ratio of 10 to 40 times. A unit packaging body that is interposed and stored in a stacked manner in a horizontal posture, and the width direction dimension and the depth direction dimension of the internal storage space of the box body are the width direction dimension and the depth direction dimension of the foamed resin sheet, respectively. A glass plate packaging unit comprising an outer envelope that is set to be substantially the same as or substantially the same as that of the unit package and covers the periphery of the unit package.   2. The glass plate packing unit according to claim 1, wherein the unit packing body is stacked and stored in a plurality of stages in the vertical direction inside the outer enclosure.