JP4862614B2 - Glass plate packing method - Google Patents

Description

  The present invention relates to an improvement in a glass plate packing technique for packing a glass plate when the glass plate is transported.

  As is well known, when transporting various glass plates including glass substrates for flat panel displays (hereinafter referred to as FPD) such as liquid crystal displays, plasma displays, electroluminescence displays, field emission displays, etc. A plurality of glass plates are packed on a pallet (hereinafter also referred to simply as a pallet) in a stacked state in a vertical posture (substantially vertical posture) with a protective sheet such as a slip sheet interposed between the glass plates. It is customary (see, for example, Patent Document 1 below).

  However, in this type of packaging, since the stress due to its own weight always acts on the lower side of the glass plate that is vulnerable to impact, after the packaging of the glass plate is completed, the glass plate (the lower side of the glass plate) Damage may occur. In particular, when a glass plate is transported, further stress acts on the lower side portion of the glass plate due to shaking during transportation, and therefore the breakage of the glass plate appears as a more prominent problem.

Such a problem of breakage of the glass plate is caused by adopting a packaging form in which stress acts on the side portion of the glass plate which is vulnerable to impact, and therefore stress acts on the side portion of the glass plate. If a difficult packing form is adopted, it is possible to reduce such damage to the glass plate. And as a packing form in which a stress hardly acts on the side portion of the glass plate as compared with the case where the glass plate is packed in the vertical posture, a mode in which a plurality of glass plates are stacked in a horizontal posture can be mentioned. As a specific example of this packing form, for example, in Patent Document 2 below, a plurality of glass plates are stacked in a horizontal posture on a pallet (tray) assembled in a lattice shape and having a flat upper surface, and then stacked. It is disclosed that a film or a band is wound around a glass plate and fixed to a pallet. Further, in this document, as another configuration, the upper surface of the pallet (tray) for packing the glass plate is L-shaped bent at a right angle, and the L-shaped corner of the upper surface of the pallet is the lowermost end. It is disclosed that the glass plate is laminated and packed on the upper surface of the pallet in a horizontal posture inclined from the horizontal posture.
JP 2005-170399 A JP-A-62-180836

  By the way, since the glass plate packed in the pallet is usually transported in that state, the pallet is required to have a configuration capable of accurately holding the glass plate packed in the transportation. . However, in the packing form in which the glass plate is fixed to the pallet by the film disclosed in Patent Document 2 above, the glass plate is fixed to the pallet only by the film or the like. The fixing force of the glass plate varies depending on the winding strength. Therefore, depending on the winding mode of the film, etc., when the packed glass plate is transported, the packed glass plate may be misaligned and the packing state may become unstable. This may cause a fatal problem that the glass plate is damaged.

Moreover, in the packing form which packs a glass plate on the pallet which makes L shape disclosed by said patent document 2, the one side part of the glass plate laminated | stacked in the horizontal attitude | position inclined according to the pallet upper surface is right-angled. because it is supported at all times at the upper surface of the bent palette, as in the packaging form for fixing the pallet of the above film or the like only Thus the glass plate, the probability of a problem that the glass plate cause a positional shift during transport occurs reduction However, the following problems will arise.

  That is, a plurality of glass plates laminated in a horizontal posture on the pallet upper surface are in a horizontal posture inclined with respect to the horizontal posture following the upper surface of the pallet, and do not fall off from the upper surface of the pallet in the inclined state. In addition, it is supported in a state where the one side portion is always in contact with the pallet. And since the upper surface of this pallet is L-shaped bent at a right angle, it becomes a cube or a rectangular parallelepiped as a whole with the side portions of the laminated glass plates overlapping in the laminating direction. Therefore, the load of the glass plate laminated | stacked upwards is easy to be applied to the one side part which is contacting the pallet of the glass plate located in the lowest part in the laminated state. And the side part of the glass plate located in the lowest part is pressed on the pallet by the load. As a result, when the glass plate packed in this state is transported, an undue stress acts on the side portion of the glass plate located at the lowermost portion, and the glass plate located at the lowermost portion is damaged such as cracking. There is a fear. The same problem may occur with respect to a plurality of glass plates positioned in the lower part including the lowermost part.

  The above description has been made on the transportation of the glass plate, but the same problem may occur when an inappropriate stress is applied to the side of the glass plate when the glass plate is laminated on the pallet. Therefore, it is desirable to prevent undue stress from acting on the sides of the glass plate even when the glass plates are laminated.

  In view of the above circumstances, the present invention reduces the stress acting on the side of the glass plate when laminating the glass plate in the horizontal position or when packing and transporting the glass plate laminated in the horizontal position. The technical problem is to reduce the breakage of the glass plate.

The glass plate packaging method according to the present invention, which was created to solve the above-mentioned problems, is a glass plate packaging method for laminating and packaging a plurality of glass plates in a horizontal posture, and is a flat portion of the laminated glass plates And a standing part that is erected on the base part so as to be located only on one side of the laminated glass plate and that supports the one side part of the laminated glass plate. The glass plate packaging pallet is used, the glass plate packaging pallet is held in a state in which the upright portion is positioned downward and the support surface of the base portion is raised, and a protective sheet is provided between the plurality of glass plates. While supporting the lower side of the glass plate with the support surface of the upright portion while supporting the flat portion of the glass plate with the support surface of the base portion, After laminating glass plates in a posture, the glass It is marked in particular wherein a state in which the glass plate is laminated in the vertical posture by tilting the support surface of the base portion of the plate packing pallets are stacked in the horizontal position.

According to such a method, glass sheets that are finally stacked in a horizontal posture (including a horizontal posture) can be handled in a vertical posture at the stage of loading on the pallet. When loading a glass plate in a vertical position on a pallet, for example, it can be loaded on the pallet by hanging it from the support means while the upper part of the glass plate is supported by a support means such as a suction pad. As in the case where the glass plate is loaded on the pallet with the posture, the situation in which the glass plate is bent can be reduced as much as possible. Moreover, since the glass plate of a vertical attitude | position and the glass plate of a horizontal attitude | position can be supported suitably with one pallet, it becomes possible to advance the packing operation | work of a glass plate including a lamination | stacking operation | work smoothly and reliably. . Furthermore, since the standing portion is erected only on one side of the glass plate, it is possible to prevent a situation in which the loading operation of the glass plate is hindered by the standing portion. In addition, after packing in this way, if the erected part of the pallet is placed so as to be positioned in front of the transportation method, even if the transportation speed of the glass plate is drastically reduced, the glass It is possible to suitably suppress the displacement of the plate at the standing portion. Here, regarding the attitude of the glass plate, “lateral attitude” means an attitude where the inclination angle with respect to the horizontal plane is 0 or more and less than 45 degrees, and “vertical attitude” means that the inclination angle of the glass sheet with respect to the horizontal plane is 45 degrees. This means an attitude of 90 degrees or less (the same applies hereinafter).

  In this case, the base portion supports the glass plate in an inclined posture in which the opposite side to the standing portion side is inclined downward by a slight angle (an angle that does not cause slippage between the glass plates, for example, within 5 degrees). It can also be configured as follows. This is preferable from the viewpoint of reducing the stress.

  On the other hand, when laminating a glass plate in a horizontal posture, it is possible to reduce stress acting on the side of the glass plate as shown below. First, the pallet having the above-described configuration is raised so that the standing portion is positioned below, and the glass plate is mounted on the base portion with the side portion (lower side portion) of the glass plate supported by the standing portion. The glass plates are sequentially stacked in a vertical posture so as to lean on the surface. Thereafter, the pallet is tilted, and the glass plate laminated in the vertical posture is changed to a state of being laminated in the horizontal posture on the base portion. If it does in this way, the glass plate finally laminated | stacked with a horizontal attitude | position (horizontal attitude | position) can be handled with a vertical attitude | position in the step which loads on a pallet. When loading a glass plate in a vertical position on a pallet, for example, it can be loaded on the pallet by hanging it from the support means while the upper part of the glass plate is supported by a support means such as a suction pad. As in the case where the glass plate is loaded on the pallet with the posture, the situation in which the glass plate is bent can be reduced as much as possible. Regarding the orientation of the glass plate, “lateral orientation” means an orientation in which the inclination angle of the glass plate with respect to the horizontal plane is not less than 0 degree and less than 45 degrees, and “vertical attitude” means the inclination angle of the glass plate with respect to the horizontal plane. Means an attitude of 45 degrees to 90 degrees (hereinafter the same).

In the above method, the glass plate packing pallet may have an angle formed by the support surface of the base portion and the support surface of the standing portion of less than 90 degrees (preferably 60 degrees or more and 80 degrees or less). Good.

Since the to lever, a supporting surface of the base portion of the pallet, the angle between the standing portion of the support surface is less than 90 degrees, one side portion of the glass plate is in contact with the supporting surface of the standing portion Thus, when the glass plates are stacked in a horizontal posture on the support surface of the base portion, each glass plate is sequentially reciprocated according to the angle formed by the support surface of the base portion and the support surface of the standing portion. They are stacked while being displaced. Therefore, the side part of the laminated | stacked glass plate exhibits step shape. That is, the load of the glass plate above it is not directly applied to the side portion of the laminated glass plate, and the stress acting on the side portion of the glass plate is reduced. As a result, it is possible to reduce the probability of occurrence of a situation in which the glass plate is broken during transportation of the glass plate. In addition, when the support surface of the base part is inclined from the horizontal plane, the same advantage can be enjoyed. In this case, the base part is configured to be able to stack the glass plates in a horizontal posture. The inclination angle of the support surface of the base portion with respect to the horizontal plane is set to be less than 45 degrees (preferably 30 degrees or less).

Even in the case of a pallet having such a configuration, by laminating the glass plates in a horizontal posture by the above method , it is possible to suitably reduce the situation where the glass plates are bent when the glass plates are loaded on the pallet. can do. Furthermore, in the pallet having such a configuration, when the glass plate laminated in the vertical posture on the pallet is changed to the horizontal posture by tilting the pallet, the side portion of the glass plate becomes the standing portion. Since it smoothly moves downward without being caught, it is possible to prevent a situation in which bending occurs around the side portion of the glass plate after being changed to the horizontal posture. Therefore, the stress which acts on the side part of a glass plate can be reduced more reliably.

In the above method , it is preferable that the standing part is configured to be detachable from the base part.

In this way, at the stage of changing the posture of the glass plate are stacked in vertical orientation on the provisional the lateral orientation, even deflected in a state where the side portion of the glass plate is Tsu scratching the standing portion, once The bent portion can be removed by removing the standing portion. In addition, if a standing part is attached to a base part again, the said function which a standing part performs when transporting a glass plate can be enjoyed similarly.

In the above method , it is preferable that the standing portion is configured to be tiltable with respect to the base portion.

If it does in this way, it will become possible to adjust the inclination-angle of the standing part with respect to a base part arbitrarily. Therefore, even if the side portion of the glass plate that is stacked in horizontal posture as deflected in a state of Tsu scratched the standing portion, the standing portion when caused to tilt in a direction away from the glass plate, releasing the deflection can do. Then, if the standing portion is tilted again and returned to a predetermined inclination angle, the above function performed by the standing portion when the glass plate is transported can be similarly enjoyed. In this case, if the angle formed between the support surface of the base portion and the support surface of the standing portion is adjusted within a range of less than 90 degrees according to the use mode or the like, it has been described in the above paragraph [0015]. The effects can be enjoyed more reliably.

  In this case, the protective sheet is preferably a foamed resin sheet.

  In this way, since the foamed resin sheet is interposed between the laminated glass plates, a good cushioning property can be obtained as compared with the interleaf paper, the resin film, etc. The impact acting on the glass plate can be moderated appropriately. In addition, since the foamed resin sheet has higher adhesion to the glass plate than the interleaf paper, the glass plate is less likely to slip with respect to the foamed resin sheet, and the glass plate is more misaligned during transportation. It becomes possible to prevent reliably.

  In the present invention described above, the laminated glass plate preferably has a side dimension of 700 mm or more and a plate thickness of 2.8 mm or less, and has a side dimension of 1000 mm or more and a plate thickness. More preferably, it is 1.8 mm or less.

  That is, according to the present invention as described above, as typified by a glass substrate for a liquid crystal display in recent years, such a glass plate can be appropriately met in response to the demand for an increase in size and a reduction in the thickness of various glass plates. It is possible to suitably transport a glass plate laminated or packed on a glass plate packing pallet.

  As described above, according to the present invention, when laminating a glass plate in a horizontal posture, or when packing and transporting a glass plate packed in a state of being laminated in a horizontal posture, on the side of the glass plate Since it is possible to reduce the situation in which undue stress acts, it is possible to reduce as much as possible the situation in which the glass plate is damaged during the laminating operation of the glass plate or during transportation.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a side view schematically showing the glass plate package according to the first embodiment of the present invention. As shown in the figure, this glass plate package 1 is formed by packing a plurality of glass plates 3 in a horizontal posture on a glass plate packing pallet 2 having an L shape in a side view. In addition, although not shown in figure, the foamed resin sheet as a protection sheet is interposed between the glass plates 3 of several sheets.

  More specifically, the pallet 2 has a base part 2a on which the glass plate 3 is laminated in a horizontal posture and a base part so as to be positioned only on one side of the glass plate 3 laminated on the base part 2a. It is comprised from the standing part 2b erected by 2a. As for the base part 2a, the upper surface is exhibiting the horizontal surface so that the glass plate 3 laminated | stacked with the horizontal attitude | position may be supported with a horizontal attitude | position. The standing portion 2b is erected at a right angle to the upper surface of the base portion 2a.

  Since the glass plate 3 laminated | stacked on the pallet 2 provided with such a structure will be laminated | stacked with a horizontal attitude | position, the load of the glass plate 3 will press the edge part of the glass plate 3 against the standing part 2b. No undue stress is applied to the side portion. Therefore, when the glass plate 3 is transported, stress is not always applied to the side portion of the glass plate 3, so that the situation that the glass plate 3 is damaged due to shaking during transportation is reduced as much as possible. be able to. Further, if the packaging body 1 is arranged so that the upright portion 2b of the pallet 2 is positioned in front of the transport direction, even when the transport speed of the glass plate 3 is transported, the glass plate 3 can be suitably suppressed by the standing portion 2b.

  In this embodiment, the glass plate 3 is a glass substrate for a liquid crystal display having a plate surface size of 1900 mm × 1600 mm and a thickness of 0.7 mm. The foamed resin sheet is a foamed polyethylene sheet (trade name: mirror mat) 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. It is larger than the plate surface of the glass plate 3.

  Next, the packing method for manufacturing the said package 1 is demonstrated.

  Basically, as a method for packing the packing body 1, a method is adopted in which the glass plates 3 that have been placed in a horizontal posture in advance are sequentially loaded onto the pallet 2 in the same posture. Specifically, a method of sequentially loading the pallet 2 in a state where the upper surface of the glass plate 3 placed in a horizontal posture is supported by a support means such as a suction pad is employed.

  However, in recent years, as typified by glass substrates for FPD, various types of glass plates have been promoted to be large and thin, so when loading large and thin glass plates onto a pallet by the above method. Then, the glass plate supported in the horizontal posture by the support means is bent. And when such a bending arises, there exists a possibility of causing the situation that an undue stress acts on the side part of a glass plate, and a glass plate is damaged. In particular, since a fine circuit or element is formed on the surface of a glass substrate for FPD, when a glass plate is loaded on a pallet, the area where the supporting means can be contacted is limited to a very small area. Therefore, the glass substrate supported in the horizontal posture by the support means will bend more greatly, and the stress acting on the side portion of the glass substrate may be increased.

Therefore, as a packing method for the packing body 1, the pallet 2 is stood up so that the standing portion 2b is positioned below, and the side portion (lower side portion) of the glass plate 3 is raised as the standing portion 2b. In a state where the glass plate 3 is supported on the base portion 2a, the glass plates 3 are sequentially stacked in a vertical posture, and then the pallet 2 is tilted, and the glass plates 3 stacked in a vertical posture are A method of changing to a state of being stacked in a horizontal posture (horizontal posture) on the base portion 2a is adopted. If it does in this way, the glass plate 3 finally laminated | stacked with a horizontal attitude | position (horizontal attitude | position) can be handled with a vertical attitude | position in the stage loaded on the pallet 2. FIG. When the glass plate 3 is loaded on the pallet 2 in the vertical posture, for example, the upper part of the glass plate 3 is supported by a support means such as a suction pad and is suspended from the support means to the pallet 2. Since it can be loaded, it is possible to reduce as much as possible the situation in which the glass plate 3 is bent as in the case where the glass plate 3 is loaded on the pallet with the horizontal posture. Note that when the glass plate 3 is a glass substrate or the like for liquid crystal displays, down-draw method (eg Overclocking flow down draw method, a scan Lock preparative down draw method) As a forming method of is employed in customary In this case, since the glass plate 3 is formed in a vertical posture, the glass plate 3 can be handled in a vertical posture at the stage of being stacked on the pallet 2, and this packing method becomes more useful.

  Specific examples of the method for changing the glass plate 3 in the vertical posture to the horizontal posture as described above include the following.

  For example, as shown in FIG. 2 (a), the pallet 2 is placed on the jig 4 in a state where it is erected so that the standing portion 2b is positioned below. With the pallet 2 placed on the jig 4 in this way, the base part 2a of the pallet 2 is slightly inclined with respect to the vertical surface, and a glass plate is leaned against the inclined base part 2a. Laminate in a vertical position. After this stacking operation is completed, as shown in FIG. 2B, the pallet 2 is placed integrally with the jig 4 on the pallet tilting means 5 disposed at a predetermined work position. Is rotated to tilt the glass plate 3 together with the pallet 2 and the tilted pallet 2 is taken out from the pallet tilting means 5 to obtain the package 1 in the state shown in FIG. If it does in this way, since the jig | tool 4 can be moved freely, the place which laminates | stacks the glass plate 3 on the pallet 2 with a vertical attitude | position can be set arbitrarily.

  Further, as shown in FIG. 3, the pallet tilting means 6 may also serve as the jig 4. Specifically, the pallet tilting means 6 can be tilted on the mounting portion 6a on which the pallet 2 in an upright state is mounted and on the opposite side of the mounting portion 6a from the glass plate 3 mounting side. And a tilting mechanism 6b composed of a cylinder, a link mechanism, etc. Moreover, as shown in FIG. 4, you may comprise so that the pallet 7 itself may be equipped with the function of the pallet tilting means 6 shown in FIG. More specifically, the base portion 7a of the pallet 7 is connected to the first base portion 7a1 on which the standing portion 7b is erected and the tilting mechanism 8 that tilts the first base portion 7a1. It may be divided into two base parts 7b.

  FIGS. 5A and 5B are side views schematically showing a glass plate package according to the second embodiment of the present invention. The difference between the package 11 according to the second embodiment and the package 1 according to the first embodiment is the structure of the pallet. Only this difference will be described below.

  As shown in FIG. 5 (a), the pallet 12 used in the packing body 11 has an angle θ formed by the base portion 12a and the standing portion 12b on the laminated glass plate 3 side of less than 90 degrees ( Preferably, it is set to 60 degrees or more and 80 degrees or less. In this way, when the glass plate 3 is laminated in a horizontal posture on the base portion 12a so that one side portion of the glass plate 3 is in contact with the standing portion 12b, each glass plate 3 has a base portion. In accordance with the angle θ formed by 12a and the standing portion 12b, the layers are sequentially stacked while being shifted from each other. Therefore, as shown in FIG.5 (b), the side part of the laminated | stacked glass plate 3 will exhibit step shape. That is, the load of the glass plate 3 above the side of the laminated glass plate 3 is not directly applied, and the stress acting on the side of the glass plate 3 is reduced. As a result, breakage of the glass plate 3 can be reduced. In addition, the base part 20a may incline from the horizontal surface.

  The present invention is not limited to the above embodiment, and various modifications can be made.

  For example, the erected part of the pallet may be configured to be detachable from the base part, or may be configured to be tiltable.

  Further, when transporting, if necessary, after laminating a glass plate in a horizontal posture on the pallet described above, the glass plate may be fixed to the pallet with a belt, a stretch film or the like to form a package. In addition, after laminating glass plates on a pallet in a horizontal position, a separate plate material is added to surround the remaining three sides of the laminated glass plates, and a belt or stretch film is wound around them. May be fixed to the pallet.

  Furthermore, in the above embodiment, the case of packing a glass substrate for a liquid crystal display has been described as an example. However, the glass plate packing pallet and the glass plate packing method according to the present invention are limited to a glass substrate for a liquid crystal display. Suitable for packaging technology for glass substrates for various image display devices such as plasma displays, electroluminescence displays, field emission displays, etc., and glass substrates used as substrates for forming various electronic display functional elements and thin films can do.

It is a side view which shows typically the whole structure of the glass plate package which concerns on 1st embodiment of this invention. It is a figure which shows the packing procedure of the said package, Comprising: (a) is a figure which shows the initial stage process, (b) is a figure which shows the process of the last stage. It is a figure which shows another example of the said packing procedure. It is a figure which shows another example of the said packing procedure. (A) is a side view which shows typically the whole structure of the glass plate package which concerns on 2nd embodiment of this invention, (b) is a principal part enlarged view of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Glass plate packing body 2,12 Glass plate packing pallet 2a, 12a Base part 2b, 12b Standing part 3 Glass plate

Claims (6)

It is a glass plate packing method for stacking and packing a plurality of glass plates in a horizontal posture,
A base part that supports the flat part of the laminated glass plate, and the one side part of the laminated glass plate that is erected on the base part so as to be positioned only on one side of the laminated glass plate Using a pallet for packing glass plates composed of a standing part to support,
Said standing portion and is positioned below hold the glass plate packaging pallet while being erected a support surface of the base portion, while interposing a protective sheet to a plurality of glass plates, of the standing portion to support the lower side of the glass plate support surface, by supporting the planar portion of the glass plate support surface of the base portion, after laminating the glass plate in a vertical orientation on the glass plate packaging pallet on the A glass plate packing method characterized in that the support surface of the base portion of the glass plate packing pallet is tilted so that the glass plates stacked in the vertical posture are stacked in a horizontal posture. 2. The glass plate packing method according to claim 1, wherein the glass plate packing pallet has an angle formed by a support surface of the base portion and a support surface of the upright portion of less than 90 degrees. The glass plate packing method according to claim 1, wherein the erected portion of the glass plate packing pallet is detachable from the base portion. The glass plate packing method according to any one of claims 1 to 3, wherein the erected portion of the glass plate packing pallet is tiltable with respect to the base portion. The glass sheet packing method according to claim 1, wherein the protective sheet is a foamed resin sheet. The glass plate packaging method according to any one of claims 1 to 5, wherein the laminated glass plates have a side dimension of 700 mm or more and a plate thickness of 2.8 mm or less.

Images