JP2007039092A - Glass panel packing unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass panel packing unit capable of adequately coping with an increase in size and weight of a packing body with increase in size of a glass panels, and the handling difficulty caused by it, and preventing breakage or surface damages of the glass panels even when the glass panels are subjected to heavy vibration during the conveyance. <P>SOLUTION: A glass panel packing body 1 is equipped with a box body 2 having four side wall parts 5a for covering the entire surface of four sides and a bottom wall part 2b for covering the entire surface of the bottom part. Foamed resin sheets 4 as protective sheets and glass panels 5 are accommodated in an internal accommodation space 3 of the box body 2 in a laminated state in the horizontal posture successively from the lower side. The uppermost part is formed of the foamed resin sheet 4, and the entire surface of the upper part thereof is covered by an upper lid part 2c consisting of a cushioning sheet member. A sheet-like shock-absorbing body 6 is arranged on an inner bottom surface of the box body 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a glass plate package, and more particularly to a glass plate package capable of preventing the occurrence of breakage and surface scratches during conveyance of a thin glass plate used in a liquid crystal display or the like.

  Conventionally used as a substrate for forming glass plates and various electronic functional elements and thin films used in the production of glass panels for flat panel displays such as liquid crystal displays, plasma displays, electroluminescence displays, and field emission displays. The glass plate or the like to be used is usually transported from a glass maker to a display maker or the like as a package in a state in which a plurality of glass plates are stored and held as a group.

  In addition, for example, in manufacturing the above-described various flat display glass panels, a technique in which a plurality of glass panels are produced 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). As a result, attempts have been made to make the glass plate manufactured by glass manufacturers as large as possible, and practical application has been attempted.

  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 is increasing to 680 × 880 mm size, 1000 × 1200 mm size, 1500 × 1800 mm size, etc., and now 1950 × 2250 mm size (thickness 0.7 mm or less) base glass is being manufactured. .

  In this case, the above-mentioned exemplified glass plates and glass plates according to them are actually thin and easily breakable with such a large plate.

When packing this type of glass plate, as described in Patent Documents 1 and 2 below, using a protective pad for buffering or a separating member, a plurality of glass plates are placed in a vertical posture at equal intervals or It was customary to arrange and package in parallel in a substantially vertical position. In Patent Document 3, a plurality of glass plates are stored in a stacked manner in a horizontal posture with a protective sheet interposed between them in an internal storage space of a box having four side walls and a bottom wall. Such a packaging technique is disclosed.
JP-A-5-319456 JP 2000-203679 A JP-A-2005-75366

  By the way, as disclosed in Patent Documents 1 and 2 described above, if a plurality of glass plates are stored separately from each other, transportation efficiency is lowered, which is disadvantageous in terms of cost. If the glass plates are arranged in parallel in a vertical posture, the glass plate itself may be undesirably compressed and deformed due to its own weight with the increase in the size of the glass plate and the resulting weight increase. The cushioning material or the like receiving the lower end of the plate is unduly compressed and deformed, so that the cushion function or the impact relaxation function cannot be exhibited. For this reason, not only does the probability of occurrence of cracks in the glass plate due to vibration during transportation, etc. increase, but there is a risk that the cushioning material will deteriorate early and it will be difficult to use repeatedly, which is disadvantageous in terms of cost. It becomes.

  In order to cope with such a problem, as disclosed in the above-mentioned Patent Document 3, a horizontal posture in which the protective sheet material is interposed between the plurality of glass plates in the internal space of the box. However, even when such a packing form is adopted, if the glass plate is subjected to severe vibration during transportation, the glass plate may move and break in the box. In addition, when paper such as slip sheets is used as the protective sheet material and foreign matter such as dust or dirt is sandwiched between the glass plate and the protective sheet material, the glass plate is protected by the vibration during transportation. There may be a problem that the surface of the glass plate is scratched due to relative movement with respect to the material.

  The present invention has been made in view of the above circumstances, and after avoiding problems caused by packaging each glass plate in a vertical posture, the size and weight of the package accompanying the increase in the size of the glass plate It is a technical problem to appropriately cope with the increase and the difficulty of handling due to this increase, and to prevent the glass plate from being damaged and the occurrence of surface scratches even when subjected to severe vibration during transportation.

  The glass plate package according to the present invention, which has been 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 shock absorber is disposed on the inner bottom surface of the box in a glass plate package in which a plurality of glass plates are stored in a stacked manner in a horizontal posture with a protective sheet material interposed between them. It is characterized by being formed.

  Any of the above shock absorbers can be used as long as they have the effect of sufficiently mitigating the impact and preventing them from being transmitted to the glass plate even when subjected to large vibrations when transporting the glass plate package. However, in view of functionality, workability, etc., it is preferable to use a soft elastomer having a high stress dispersibility. Specifically, it is preferable that it is made of a soft elastomer having a hardness (JIS K6301, spring hardness Hs) of less than 30, preferably less than 10, more preferably less than 5. Examples of such soft elastomers include urethane gel (trade name) manufactured by Hamamatsu Platec Co., Ltd., urethane elastomer manufactured by Sanshin Kosan Co., Ltd .: sorbosein (trade name), silicone gel manufactured by Geltech Co., Ltd .: α gel (trade name) ) Etc. can be used.

  The impact absorber is preferably in the form of a sheet, and if the thickness is within the range of 0.3 to 30 mm, the effect of absorbing the impact on the glass plate is easily exhibited, and the upper and lower sides are inappropriate. It becomes possible to avoid becoming bulky. The shock absorber is preferably disposed so as to cover the entire inner bottom surface of the box, but only a part of the surface is supported unless it can withstand the load of the glass plate and a non-uniform load is applied during transportation. You may arrange | position so that it may cover. The shock absorber may be mounted simply on the inner bottom surface of the box, but may be mechanically attached or bonded. Further, a bottom plate may be interposed above and / or below the shock absorber. For example, after the shock absorber is disposed on the inner bottom surface of the box, a bottom plate may be placed thereon, and a glass plate may be placed on the bottom plate.

  In the present invention, the shock absorber is disposed on the inner bottom surface of the box, and a plurality of glass plates are housed in the upper part thereof, so that a large vibration is generated during transportation, and the vibration is transmitted to the box. But shock absorbers relieve it. Therefore, vibration is not easily transmitted to the glass plate housed in the box, and the glass plate can be prevented from moving and being damaged. Even if a foreign object is sandwiched between the glass plate and the protective sheet material, the glass plate is prevented from moving relative to the protective sheet material due to vibration during transportation, and the surface of the glass plate is damaged. It can prevent sticking.

  The box for storing the glass plate can be any material as long as it is a material that does not deform even when used for a long time, and is preferably made of metal or hard resin. In addition to the four side walls and the bottom wall, the box may have an upper wall that covers the entire upper surface or substantially the entire surface.

  Moreover, in this invention, it is preferable to cover the circumference | surroundings of a glass plate package with an outer enclosure. The outer enclosure may be in the form of a box, or the portion corresponding to the four side walls of the box may be formed of a stretch film, a shrink film, or the like. Furthermore, the number of glass plate packages covered with the outer enclosure may be one or plural. The protective sheet material may be paper such as slip paper, or a resin film or resin sheet, but is preferably a foamed resin sheet described later.

  According to such a configuration, since each glass plate is stored in a horizontal posture in the internal storage space of the box body, a problem caused by storing each glass plate in a vertical posture, that is, with an increase in the size of the plate. It is possible to avoid problems such as the glass plate itself undergoing unreasonable bending deformation or the like due to its own weight, or the shock absorbing function or the like supporting the lower end of the glass plate improperly impairing the impact mitigation function. Furthermore, since the box is covered at least on the four sides and the bottom by the entire or substantially entire surface with the four side walls and the bottom wall, each glass plate accommodated in the box is appropriately It is in a state of being blocked from the external space (when the upper wall portion is provided), and therefore, there is a large probability that foreign matter such as dust and dust existing in the external space will adhere to the glass plate and become contaminated. descend.

  In addition, a packaging body in which a plurality of glass plates are stored in a stacked manner in a horizontal posture with a protective sheet material interposed between each other in the internal storage space of the box body is a glass plate located at the bottom. A large weight will act. Therefore, when packing many glass plates, it is preferable to divide them into a plurality of packing bodies and store them. Thereby, the situation where an unreasonably big weight acts on the glass plate located in the lowest part of a package, the situation where the glass plate is damaged due to this, etc. are effectively avoided. .

  In the above-described configuration, the glass plate package can be stacked and stored in a plurality of stages in the vertical direction. In this way, a large number of glass plates can be accommodated 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 located at the lowermost part of each package, and it is possible to effectively reduce the weight of each package, so that it can be used at the time of packing work or after transportation. It becomes easy and easy to handle the package when taking out the glass plate.

  Further, as the protective sheet material, papers such as slip sheets, resin films, resin sheets, and the like can be used, and it is preferable that they are in contact with the entire surface or substantially the entire surface of the glass plate. When a foamed resin sheet is used as the protective sheet material, a good cushioning property can be obtained as compared with paper or a resin film, and the impact acting on each glass plate at the time of transportation or the like is further alleviated. Further, since the surface of the foamed resin sheet has higher adhesion (or frictional resistance or contact resistance) to the surface of the glass plate than papers such as slip sheets, the glass plate is less likely to slip with respect to the foamed resin sheet. Thus, the probability of relative movement between the two becomes extremely high. Therefore, even if foreign matter such as dust or dirt is present between the glass plate and the foamed resin sheet, the probability that the foreign matter will rub against the surface of the glass plate is reduced, and the foreign matter causes the glass plate. It is more difficult to cause defects such as scratches on the surface. In addition, paper such as slip sheets, when stored in a box, generates dust and dust from the cut part and contaminates the surrounding atmosphere. Although it is practically impossible to perform the storing operation on the body, the foamed resin sheet does not generate such dust and dust, and thus can be stored in a clean room. Accordingly, it is possible to suppress as much as possible the entry of foreign matter such as dust and dust into the inside of the box while performing the operation of storing the glass plate and the foamed resin sheet in the box. It becomes possible.

  Moreover, it is preferable that the thickness of a foamed resin sheet is 0.3-5.0 mm. In this way, when a plurality of glass plates are housed inside the box body in a horizontal posture with a foamed resin sheet interposed between them, the glass plates are sufficiently protected, etc. It is possible to avoid unreasonably bulkiness in the vertical direction. 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. As a result, the foamed resin sheet is too thin, and it is easy to be torn and difficult to handle during the storing operation. 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, in said structure, it is preferable that the expansion ratio of the said foamed resin sheet is 10 to 40 times.

  If it does in this way, the situation where tearing arises can be avoided after securing the suitable cushioning property etc. with respect to the glass plate of a foamed resin sheet. That is, when the foaming ratio of the foamed resin sheet is less than 10, 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, the foamed resin sheet becomes too soft, and the tear tends to occur and the handling during the storing operation becomes difficult. 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.

  Furthermore, in the above configuration, the width direction dimension and the depth direction dimension of the internal space of the box body are set to be the same as or substantially the same as the width direction dimension and the depth direction dimension of the foam resin sheet, respectively, and the foam resin sheet It is preferable that the width direction dimension and the depth direction dimension are set to be longer than the width direction dimension and the depth direction dimension of the glass plate. In this case, the width direction dimension and the depth direction dimension of the foamed resin sheet are longer by, for example, 20 mm to 100 mm than the width direction dimension and the depth direction dimension of the glass plate, respectively.

  In this way, when a plurality of glass plates are placed in the internal space of the box body in a horizontal posture with the foam resin sheets interposed between each, the foam resin sheets are placed on the inner surface of the four side portions of the box body. Since the outer peripheral edges of the foamed resin sheets are in contact with or substantially in contact with each other, it is possible to prevent the foamed resin sheets from being displaced in the horizontal direction inside the box. Moreover, as described above, the foamed resin sheet protrudes from the entire circumference of the outer peripheral edge of the glass plate to the outer peripheral side when the required dimension of the foamed resin sheet is longer than the required dimension of the glass plate. Can do. And if it will be in such a state, since each glass plate will be stuck to each foamed resin sheet and it will be in the state where horizontal movement was prevented by the adhesiveness, the outer periphery of each glass plate at the time of conveyance etc. Is effectively avoided from contacting or colliding with the inner surface of the four side walls of the box, and the glass plate is appropriately protected.

  In addition, the foamed resin sheet preferably does not contain an antistatic agent in order to prevent adhesion of dirt when coming into contact with the surface of the glass plate. However, a high molecular weight type resin is used without using a surfactant, even if the material itself contains a foamed resin sheet containing an antistatic agent (for example, a polymer type antistatic agent) or a surfactant. Since the foamed resin sheet using the surfactant hardly causes a problem of adhesion of dirt when it comes into contact with 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 the low molecular weight type surfactant has a large amount of dirt when it comes into contact with the surface of the glass plate, it should be avoided to use this foamed resin sheet as a protective sheet material. Be wise.

  As described above, according to the glass plate package of the present invention, the shock absorber is disposed on the inner bottom surface of the box, and a plurality of glass plates are interposed between the protective sheet materials above each other. Since it is stored in a stack in a horizontal posture, even if severe vibration occurs when it is transported, the impact applied to the glass plate by the action of the shock absorber is small, and the glass plate moves in the internal space of the box It is possible to prevent the glass plate from being damaged and the surface damage from being caused. In addition, since multiple glass plates are stored in a horizontal posture in the internal space of the box body, undesired bending deformation caused by storing each glass plate in a vertical posture and impact mitigation inhibition generated at the lower end support portion of the glass plate, etc. Bugs are avoided. Moreover, since the box is covered with at least the four side walls and the bottom wall, there is a probability that foreign matters such as dust and dust existing in the external space will be sandwiched between the glass plate and the protective sheet material. Decrease significantly. Furthermore, a plurality of glass plate packages can be stacked up and down in a plurality of stages, and an inappropriately large weight can be prevented from acting on the lowermost glass plate of the glass plate package.

  And if the glass plate package is stacked and stored in a plurality of stages, it will be possible to store a sufficient number of glass plates in one packing unit even if the depth of each box is reduced. The glass plate package can be made lighter and more compact, and the glass plate package can be handled easily and easily at the time of packing operation and at the time of taking out the glass plate after conveyance.

  Furthermore, if 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 adhesion to the surface of the glass plate can be achieved. Since it is higher than paper such as slip paper, the glass plate is less likely to slide with respect to the foamed resin sheet, and the probability of relative movement between the two becomes extremely low.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view schematically illustrating a glass plate package according to an embodiment of the present invention, and FIG. 2 is a glass plate packing unit (hereinafter referred to as a packing unit) using the glass plate package of FIG. ) Is a schematic perspective view schematically showing the overall configuration of FIG. 3, and FIG. 3 is a schematic perspective view showing the production status of the packaging unit of FIG. 2.

  As shown in FIG. 1, the glass plate package 1 includes a box body 2 having four side wall portions 2 a that cover the entire surface of the four side portions and a bottom wall portion 2 b that covers the entire surface of the bottom portion. In the storage space 3, the foamed resin sheet 4 and the glass plate 5 as the protective sheet material are stored in a stacked manner in a horizontal posture sequentially from the lower side, and the uppermost portion is used as the foamed resin sheet 4, and The entire surface is covered with an upper lid plate 2c made of a buffer plate material. A sheet-like shock absorber 6 is disposed on the inner bottom surface of the box 2.

  As shown in FIG. 2, the glass plate package 1 is formed into a packing unit 8 by being stacked in a plurality of stages (for example, 10 to 50 stages) vertically on a conveyance base (pallet) 7. Further, the periphery of the glass plate package 1 is covered with a box-shaped outer enclosure 9, and the outer enclosure 9 is fixed on the upper surface of the transport base 7.

  In this embodiment, the glass plate 5 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. Moreover, the impact absorber 6 is, for example, a silicone gel (trade name: α gel) manufactured by Geltech Co., Ltd. having dimensions of 100 mm × 100 mm × 2 mm. Furthermore, the foamed resin sheet 4 is, for example, 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 a foaming ratio of 20 to 25, and has a widthwise dimension. Is 1550 mm and the dimension in the depth direction is 1900 mm. And the inner surface of the four side wall parts 2a of the box 2 in the glass plate package 1 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 4. In this case, since the glass plate 5 is placed at the center of the foamed resin sheet 4, the foamed resin sheet 4 protrudes from the entire outer peripheral edge of the glass plate 5 by about 25 mm.

  The packaging unit 8 configured as described above is manufactured as follows. That is, as shown in FIG. 3, in the clean room 10, the glass plate 5 conveyed by the conveyor 11 and the foamed resin sheet 4 similarly placed in the clean room 10 in a laminated form are lifted by, for example, a vacuum means. In a state where one foamed resin sheet 4 is placed on the upper surface of one glass plate 5, the sheets are sequentially stacked in a horizontal posture in the internal space of the box 2. At this time, a plurality of shock absorbers 6 are disposed in advance on the inner bottom surface of the box 2 so as to cover the entire surface. Then, when the glass plate 5 of about 5 to 20, preferably about 10, is stored in the box 2, the production of the glass plate package 1 is completed by placing the upper cover plate 2c on the upper end thereof. Then, the manufactured glass plate package 1 is sequentially carried out of the clean room 10. Note that the shock absorber 6 is not necessarily disposed on the entire inner bottom surface of the box body 2 and may be disposed at a predetermined position with a gap. Further, a bottom plate may be placed on the shock absorber 6 and the glass plate 5 may be placed thereon for storage.

  In this way, the glass plate package 1 sequentially carried out to the outside of the clean room 10 is stacked in a horizontal posture sequentially from the bottom inside the outer enclosure 9 that is in a standby state outside the clean room 10. At this time, the front side plate of the outer enclosure 9 is in a removed state, and thus the glass plate package 1 can be placed on the transport base 7 using the front opening of the outer enclosure 9. . Then, when the glass plate package 1 is stacked in about 30 stages, the side unit that has been removed is fitted and fixed in the front opening of the outer enclosure 9 to complete the production of the packaging unit 8. The glass plate packing unit 8 manufactured in this way is conveyed from the site to, for example, a display manufacturing factory or the like with the glass plate 5 maintained in a horizontal posture.

It is a components disassembled arrangement perspective view showing typically the glass plate packing object concerning the embodiment of the present invention. It is a schematic perspective view which shows typically the whole structure of the glass plate packing unit (henceforth a packing unit) using the glass plate package of FIG. It is a schematic perspective view which shows the manufacture condition of the packaging unit of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glass plate package 2 Box 2a Four side wall part 1a
2b Bottom wall portion 3 Internal storage space 4 Foamed resin sheet 5 Glass plate 6 Shock absorber 7 Transport base 8 Packing unit 9 Outer enclosure 10 Clean room

Claims (6)

  A protective sheet material is interposed between each of a plurality of glass plates in an internal storage space of a box having four side walls and a bottom wall covering the entire surface or substantially the entire surface of at least four sides and the bottom. Then, in the glass plate package housed in a stacked manner in a horizontal posture, a shock absorber is disposed on the inner bottom surface of the box body.   The glass plate package according to claim 1, wherein the shock absorber is made of a soft elastomer.   The glass plate package according to claim 1 or 2, wherein the shock absorber is in the form of a sheet.   The glass sheet package according to any one of claims 1 to 3, wherein the protective sheet material is a foamed resin sheet.   The short side of a glass plate is 1500 mm or more, a long side is 1800 mm or more, and thickness is 0.7 mm or less, The glass plate package in any one of Claims 1-4 characterized by the above-mentioned.   The glass plate package according to claim 5, wherein the glass plate is used as a display substrate.