JP7032086B2 - Plate-shaped material transport container - Google Patents

Description

The present invention relates to a plate-shaped material transport container.

When a plate-shaped material such as a glass substrate or a semiconductor wafer is transported, the plate-shaped material is transported in a state of being stored in a coin stack type (horizontal) transport container (called a plate-shaped material transport container).

As the plate-shaped material transport container, for example, as shown in Patent Documents 1 and 2, the container body is covered with a lid after accommodating a plurality of plate-shaped materials in the state of the following laminated body. Is known. Here, the laminated body is formed by arranging a plurality of plate-shaped objects such as semiconductor wafers in the vertical direction so as to overlap each other in the plan view, and interposing a spacer between the vertically adjacent plate-shaped objects. It has a structure, and cushioning materials are arranged at the bottom and top of the structure as needed.

Japanese Unexamined Patent Publication No. 2004-43001 International Publication No. 2016/08482

When a plate-shaped material transport container as described in Patent Documents 1 and 2 is transported, usually, in order to prevent the plate-shaped material stored in the plate-shaped material transport container from being adversely affected by moisture, in order to prevent the plate-shaped material from being adversely affected by moisture. The plate-shaped material transport container is placed in a moisture-proof bag, the air inside the bag is degassed, and the moisture-proof bag is sealed.

In such a case, there is a risk that the corners of the plate-shaped material transport container may come into contact with the moisture-proof bag and cause tearing.

Further, a label in which predetermined information such as a lot number and a quantity of plate-shaped materials is marked on the label printing unit is affixed to the moisture-proof bag containing the plate-shaped material transport container. Then, the moisture-proof bag to which the label is attached is packed in a cardboard box or the like, so that the plate-shaped material transport container is in a packed state. At this time, normally, there is a space between the plate-shaped material transport container and the box body, and cushioning such as foam material is provided around the outer circumference of the moisture-proof bag in which the plate-shaped material transport container is stored so as to fill the space. The materials are arranged, and the misalignment of the plate-shaped material transport container inside the cardboard box is regulated.

The moisture-proof bag containing the plate-shaped material transport container is often labeled on the surface side of the portion facing the corner position on the upper surface side of the plate-shaped material transport container. When the moisture-proof bag with the label affixed in this way is packed in a cardboard box and the plate-shaped material transport container is transported in a packed state, the label rubs against the cushioning material or the box during transport. , There was a risk that the printed content of the label printing unit would be lost.

INDUSTRIAL APPLICABILITY The present invention provides a plate-shaped material transport container capable of suppressing the risk of damage to the moisture-proof bag and effectively suppressing the risk of loss of the printed content of the label printing portion even if the bag is transported in a packed state. With the goal.

The present invention comprises (1) a container body having a bottom plate, a standing wall portion rising from a predetermined position in the upper surface of the bottom plate, and a plate-shaped object accommodating space surrounded by the standing wall portion.
It is provided with a top plate having corners on the outer periphery and a lid body provided with a hanging side wall portion hanging from the lower surface side of the top plate and formed so as to be attached to the container body.
With the lid attached to the container body, the hanging side wall covers the outer surface of the standing wall, and in the plan view of the lid, the top plate covers the upper surface side of the bottom plate and faces the plate-shaped object storage space. A plate-shaped material transport container configured such that a predetermined portion including is formed as a first covering portion and an outer portion of the first covering portion is formed as a second covering portion.
The second covering portion of the top plate is directed from the boundary line formed at the boundary position between the first coating portion and the second coating portion to a predetermined portion of the outer peripheral edge of the top plate including the portion corresponding to the corner portion. An inclined surface that is inclined downward and is inclined downward from the straight line while being orthogonal to the straight line in the plan view of the top plate based on the position on the straight line connecting the tip of the corner and the center of the top plate. A plate-shaped material transport container, characterized in that
(2) The plate-shaped material transport container according to (1) above, wherein the top plate is formed in a shape in which the first covering portion is raised above the second covering portion.
(3) The plate-shaped material transport container according to (1) or (2) above, wherein the predetermined area of the first covering portion and / or the predetermined area of the hanging side wall portion is formed in a smooth surface shape. ..

According to the present invention, a plate-shaped material transport container capable of suppressing the risk of damage to the moisture-proof bag and effectively suppressing the risk of losing the printed content of the label printing portion even if the bag is transported in a packed state. Can be obtained.

FIG. 1 is a schematic perspective view schematically showing an embodiment of a plate-shaped material transport container of the present invention. FIG. 2A is a schematic plan view schematically showing a lid in an embodiment of the plate-shaped material transport container of the present invention. FIG. 2B is a schematic plan view for schematically explaining the first covering portion and the second covering portion of the lid in one embodiment of the plate-shaped material transport container of the present invention. FIG. 3 is a schematic side view schematically showing a lid in an embodiment of the plate-shaped material transport container of the present invention. FIG. 4 is a schematic exploded perspective view schematically showing an embodiment of the plate-shaped material transport container of the present invention. FIG. 5 is a schematic exploded perspective view schematically showing a structure in which a plate-shaped material is housed in the plate-shaped material transport container of the present invention. FIG. 6 is a schematic perspective view schematically showing a state in which the plate-shaped material transport container of the present invention is stored in a moisture-proof bag. FIG. 7 is a schematic perspective view schematically showing a process of attaching a cushioning material to a plate-shaped material transport container of the present invention housed in a moisture-proof bag and storing it in a box body. FIG. 8 is a schematic perspective view schematically showing an embodiment in the case where a locking structure is formed in the plate-shaped material transport container of the present invention. FIG. 9 is a schematic perspective view schematically showing an embodiment in the case where the inner wall structure is formed on the back surface side of the bottom plate in the embodiment of the plate-shaped material transport container of the present invention.

[Plate-shaped material transport container]
As shown in FIGS. 1, 4, and the like, the plate-shaped material transport container 1 includes a container body 2 and a lid 3.

(Material of container body 2 and lid 3)
Both the container body 2 and the lid 3 are preferably made of conductive plastic. Examples of the conductive plastic include plastics to which a conductive filler is added, plastics treated with a polymer alloy, and the like. Examples of the conductive filler include carbon black, graphite carbon, graphite, carbon fiber, metal powder, metal fiber, metal oxide powder, metal-coated inorganic fine powder, organic fine powder and fiber.

(Container body 2)
The container body 2 is a plate formed in an internal space surrounded by a bottom plate 4, a standing wall portion 6 rising from the upper surface of the bottom plate 4, and a standing wall portion 6 and capable of accommodating plate-like objects. It is provided with an object accommodating space 5. The vertical direction is the direction indicated by the arrow G in FIGS. 1, 3, 4, 5, and the like, and is specifically the thickness direction of the bottom plate 4. As for the inner and outer directions, the direction along the plane having the normal vector in the direction parallel to the vertical direction and the direction from the center of the bottom plate 4 to the outside is the outward direction, and the normal vector is in the direction parallel to the vertical direction. The direction along the plane having the above and from the outside toward the center of the bottom plate 4 is the inward direction.

(Bottom plate 4)
The shape of the bottom plate 4 is not particularly limited as long as the standing wall portion 6 can be erected, and the bottom plate 4 has a polygonal shape such as a rectangular shape or an octagonal shape, a circular shape, or the like in a plan view of the bottom plate 4. May be formed in. In the examples shown in FIGS. 1 to 4 and the like, the bottom plate 4 is formed in a rectangular shape with four corners chamfered.

As illustrated in FIG. 9, a side wall 7 may be formed on the back surface side of the bottom plate 4 along the peripheral edge of the bottom plate 4. Further, an inner wall structure 8 hanging from the bottom plate 4 may be formed in a portion surrounded by the side wall 7 in the bottom view of the bottom plate 4. By forming the side wall 7 and the inner wall structure 8 on the back surface side of the bottom plate 4 in this way, the strength of the bottom plate 4 can be reinforced. Further, when the side wall 7 and the inner wall structure 8 are formed in this way, it is preferable that the tips of the side wall 7 and the inner wall structure 8 are formed in a convex curved surface shape in a chamfered state. Since the tips of the side wall 7 and the inner wall structure 8 are formed in a convex curved shape, the moisture-proof bag has the side wall 7 and the inner wall structure when the plate-shaped material transport container 1 is placed in the moisture-proof bag and degassed. It becomes possible to reduce the possibility that a hole is opened in the moisture-proof bag due to the pressing force received from the tip of 8. When the tips of the side wall 7 and the inner wall structure 8 are formed in a convex curved surface shape, the convex curved surface shape is preferably such that the radius of curvature is 2 mm or more. When the tip of the side wall 7 or the inner wall structure 8 has a convex curved surface shape such that the radius of curvature is 2 mm or more, the moisture-proof bag has a hole in the moisture-proof bag due to the pressing force received from the tip of the side wall 7 or the inner wall structure 8. Can be more effectively suppressed from opening.

(Standing wall part 6)
The standing wall portion 6 is formed in a shape corresponding to the shape of the plate-shaped object. Since the shape of the plate-like object is usually disk-shaped, as shown in FIG. 4, the overall shape of the standing wall portion 6 is usually formed in a cylindrical shape and is formed inside the standing wall portion 6. The space forms the plate-shaped object accommodating space 5. The inner diameter of the standing wall portion 6 is set to a size slightly larger than the size of the plate-shaped object. The height of the standing wall portion 6 is appropriately set according to conditions such as the number of plate-shaped objects to be accommodated. Further, a notch portion 6a is formed in the standing wall portion 6, and a plate-shaped object accommodating space 5 formed inside the standing wall portion 6 communicates in the inward and outward directions at the position of the notch portion 6a. .. The notch portion 6a is taken out by using a gripping means such as an arm of a machine such as an industrial robot, and the plate-shaped object stored in the plate-shaped object accommodating space 5 is taken out. When gripping a plate-shaped object, the notch portion 6a is used as an insertion port for inserting the gripping means toward the plate-shaped object accommodating space 5. Therefore, the size and shape of the notch portion 6a are appropriately determined according to various conditions such as the size of the gripping means.

In the example of FIG. 4, the standing wall portion 6 is formed so as to stand up vertically from the bottom plate 4.

(Cover 3)
As exemplified in FIGS. 1, 2A, 2B, 3, 4, 4 and the like, the lid 3 has a top plate 10 having corners 9 on its outer periphery and a hanging surface plate 10 hanging from the lower surface side of the top plate 10. The side wall portion 11 is provided and is formed so as to be mountable on the container body 2.

(Dripping side wall portion 11)
The shape of the hanging side wall portion 11 is not particularly limited as long as it is configured to cover the outer surface of the standing wall portion 6 with the lid 3 attached to the container body 2. Specifically, in the examples shown in FIGS. 1, 4, and the like, the hanging side wall portion 11 is configured to be connected downward from the lower surface side of the top plate 10 and cover the outer surface of the standing wall portion 6.

By the way, as shown in FIG. 6, when transporting the plate-shaped material transport container 1, after the plate-shaped material transport container 1 is stored in the moisture-proof bag, the moisture-proof bag 12 in which the plate-shaped material transport container 1 is stored has a lot number or a plate shape. A label 13 on which predetermined information such as the quantity of goods is described in the label printing unit 14 is attached. The label 13 is usually affixed to the surface side of the portion of the moisture-proof bag 12 facing the corner portion 9 of the top plate or a portion in the vicinity thereof, but even if the label 13 is affixed to the position corresponding to the hanging side wall portion 11. good. Looking at the case where the label 13 is attached to the hanging side wall portion 11, it is preferable that the hanging side wall portion 11 is formed with a predetermined region of the outer peripheral surface thereof in a smooth surface shape. In this case, the surface side of the portion of the moisture-proof bag 12 facing the portion formed in a smooth surface shape as a predetermined portion of the hanging side wall portion 11 is the portion to which the label is attached. For this reason, it is possible to regulate the occurrence of unevenness in the label affixed portion, and when the moisture-proof bag to which the label is affixed is housed in a cardboard box or the like, packed and transported, the printed content of the label printing part is rubbed and disappears. It becomes possible to reduce the risk of printing.

(Top plate 10)
As shown in FIG. 1 and the like, the top plate 10 has the top plate 10 in a plan view (that is, in a plan view of the plate-shaped material transport container 1) and the bottom plate 4 in a state where the lid 3 is attached to the container body 2. It is configured to cover the upper surface side of the.

The shape of the top plate 10 is not particularly limited, and the top plate 10 may be formed into a polygonal shape such as a rectangular shape or an octagonal shape, or a circular shape in the plan view of the lid 3. In the example shown in FIGS. 2A and 2B, the top plate 10 of the lid 3 is formed in a rectangular shape with four corners chamfered.

(First covering portion 15 and second covering portion 16)
In the plan view of the lid 3, the top plate 10 has a predetermined portion including a portion facing the plate-shaped object accommodating space 5 as a first covering portion 15 and an outer portion of the first covering portion 15 as a second covering portion 16. Eggplant. In the example shown in FIG. 2B, the first covering portion 15 is a portion of the top plate 10 facing the entire portion of the plate-shaped object accommodating space 5 in the plan view of the lid 3 (in FIG. 2B, the top plate. The second covering portion 16 is specified as a portion specified by the shaded area including the center C1), and the second covering portion 16 has a pattern different from the portion outside the first covering portion 15 (in FIG. 2B, the portion specified by the shaded area including the center C1 of the top plate). It is specified as the part specified by the shaded area of.

(Corner 9)
The top plate 10 has a corner portion 9 on the outside of the first covering portion 15 (second covering portion 16), and the shape of the top plate 10 is rectangular as in the examples of FIGS. 1, 2A, 2B and the like. In the case of, each predetermined portion including the corner position with respect to each of the four corner positions on the top plate 10 corresponds to the corner portion 9. As shown in the examples of FIGS. 2A and 2B, the corner portion 9 of the top plate 10 is formed in a shape in which the tip thereof is chamfered, and the corner portion 9 is smoothly formed in the plan view of the top plate 10. It is preferable that the exterior contour shape is curved outward.

(Inclined surface 17)
In the second covering portion 16 of the top plate 10, a boundary line formed at the boundary position between the first covering portion 15 and the second covering portion 16 as shown in FIGS. 2A and 2B (examples of FIGS. 2A and 2B). Then, from the ridge line M1), the portion of the outer contour line (the ridge line M2 in the examples of FIGS. 2A and 2B) along the outer peripheral edge of the top plate 10 which is the outer peripheral edge of the top plate 10 corresponds to the corner portion 9. An inclined surface 17 that inclines downward toward a predetermined portion including the portion is formed. Here, the fact that the inclined surface 17 is inclined downward in the second covering portion 16 means that the surface of the second covering portion 16 is inclined diagonally downward from the center C1 of the top plate 10 in the outward direction. Show that. Since the inclined surface 17 that is inclined downward is formed in the predetermined portion including the corner portion 9 of the second covering portion 16 in this way, the moisture-proof bag 12 containing the plate-shaped material transport container 1 as shown in FIG. In the state where the label 13 having the label printing portion 14 is attached to the position corresponding to the corner portion 9 of the top plate 10 or in the vicinity thereof, the moisture-proof bag 12 is arranged with the shock absorber 18 as shown in FIG. It is possible to reduce the possibility that the printed contents of the label printing unit 14 will be rubbed and lost when the label printing unit 14 is housed in a cardboard box 19 or the like, packed and transported.

In addition, in order to obtain the effect of reducing the possibility that the printed content of the label printing unit 14 is rubbed and disappears, examples of the formation pattern of the inclined surface 17 that is inclined downwards are shown in FIGS. 2A, 2B, 3 and the like. As shown in the above, the inclined surface 17 is not only radially downwardly inclined from the center C1 of the top plate 10 toward the outside direction (for example, in the direction of arrow P1 in FIG. 2A), but also is further inclined at the tip of the corner portion 9. With reference to the position on the straight line L connecting C2 and the center C1 of the top plate, also in the direction away from the straight line L while being orthogonal to the straight line L in the plan view of the top plate 10 (arrows P2 and P3 in FIG. 2A). It is preferable to have a downward slope. That is, in the example of FIG. 2A, it is more preferable that the inclined surface 17 has a portion formed in a convex curved surface shape. In the case of FIG. 2A, a variable curve M3 is formed between the ridge line M1 and the ridge line M2 on the inclined surface 17, and the curved surface portion between the ridge line M1 and the variable curve M3 and the variable curve M3 to the ridge line M2. The curved surface between them is smoothly connected. The curved surface portion between the ridge line M1 and the variable curve M3 is an inclined surface that slopes downward while projecting slightly diagonally upward from the center C1 of the top plate toward the outside (radial direction), and the ridge line from the variable curve M3. The curved surface portion between M2 is an inclined surface that gradually becomes gentle from the position of the variable curve M3 toward the ridgeline M2 in the radial direction. The inclined surface 17 is formed in a convex curved surface shape that inclines downward in the direction of the arrow P2 and the direction of the arrow P3 with the position on the straight line L as the center.

It is more preferable that the top plate 10 is prevented from being in an angular state at the position of the ridge line M2. In this case, the curved surface portion between the variable curve M3 and the ridge line M2 gradually has a gentle slope toward the ridge line M2 in the radial direction from the position of the variable curve M3, and the slope becomes gentle in the position of the ridge line M2 and the region in the vicinity thereof. The slope becomes steeper gradually.

Here, the ridge line M2 forms a boundary between the side peripheral end surface of the top plate 10 and the second covering portion. By avoiding an angular state at the position of the ridge line M2, a state is formed in which the curve is smoothly curved at the position of the ridge line M2 and the second covering portion is smoothly connected to the side peripheral end surface, which is more effective. Therefore, it is possible to suppress the risk of damage to the moisture-proof bag 12 and the risk of the printed content of the label printing portion being rubbed and disappearing.

The top plate 10 may have the first covering portion 15 formed in a shape that is raised above the second covering portion 16. In this case, the base end of the raised portion becomes the boundary position between the first covering portion 15 and the second covering portion 16, and a boundary line can be formed at that position.

By the way, as described above, a label in which predetermined information such as a lot number and a quantity of plate-shaped materials is marked on the label printing unit is attached to the moisture-proof bag 12 containing the plate-shaped material transport container 1. The label is usually affixed to the surface side of the portion of the moisture-proof bag facing the position of the corner 9 of the top plate 10, but the top plate 10 in the packaging bag is the same as described above for the hanging side wall portion. It may be attached to the surface side of the portion facing the first covering portion 15 of the above. When the label is affixed to the surface side of the portion of the top plate 10 facing the position of the first covering portion 15 in the packaging bag, the top plate 10 is formed with a predetermined area of the first covering portion 15 in a smooth surface shape. Is preferable. In this case, the portion of the surface of the moisture-proof bag 10 facing the portion of the surface of the first covering portion 15 that is formed in a smooth surface shape as a predetermined portion is the portion to which the label is attached. For this reason, it is possible to regulate the occurrence of unevenness in the label affixed portion, and when the moisture-proof bag to which the label is affixed is housed in a cardboard box or the like, packed and transported, the printed content of the label printing part is rubbed and disappears. It becomes possible to reduce the risk of printing.

(Locking structure)
The plate-shaped material transport container 1 of the present invention may be configured so that a locking structure can be formed when the lid 3 is attached to the container body 2.

In the example of FIG. 8, the container body 2 is provided with a locking piece 21 having a locking claw 20 at a corner of the bottom plate 4. Then, in the lid body 3, a claw hole 22 is formed at a position corresponding to the position of the locking claw 20 when the lid body 3 is attached to the container body 2. As a result, the formation of the locking structure between the container body 2 and the lid 3 can be realized as follows. That is, the locking piece 21 of the container body 2 is inserted into the locking hole 22 of the lid 3, and the locking claw 20 is inserted to the upper surface side of the top plate 10 of the lid 3 around the locking hole 22 to be the locking claw. By locking 20 to the locking hole 22, a locking structure between the container body 2 and the lid 3 is formed. The lid 3 can be easily removed by releasing the locking in the locking hole 22 by the locking claw 20.

[Use of plate-shaped material transport container 1]
The plate-shaped material transfer container 1 can store the plate-shaped material 23 as follows, for example.

As shown in the example of FIG. 5, the cushion material 24 and the ring spacer 25 are arranged in order from the bottom in the plate-shaped material accommodating space 1 formed inside the standing wall portion 6 of the container body 2, and the plate-shaped material is placed on the cushion material 24 and the ring spacer 25. 23 is placed. After that, the ring spacer 25 and the plate-shaped object 23 are alternately stacked in the vertical direction in order, and after further arranging the ring spacer 25, the cushion material 24 is arranged on the upper side thereof. Then, the lid 3 is attached to the container body 2 from above the cushion material 24. As a result, the plate-shaped material 23 can be stored in the plate-shaped material transport container 1.

(Plate)
The plate-shaped object 23 indicates a glass substrate, a semiconductor wafer, or the like, and its shape is usually disk-shaped. Further, the plate-shaped object 23 is highly required to have no scratches or cracks according to the purpose of use thereof.

(Ring spacer 25)
The ring spacer 25 can exemplify a spacer made of a ring body formed in the shape of a ring plate, and the adjacent plates are laminated so that the plate-like objects 23 adjacent to each other in the vertical direction are laminated in a non-contact manner. It can be used by being interposed between the objects 23.

(Cushion material 24)
The cushion material 24 buffers the vertical movement of the plate-shaped object 23. The material of the cushion material 24 can be appropriately selected, but a synthetic resin foam material can be used, and specific examples thereof include flexible polyurethane foam, polyethylene foam, polypropylene foam, and polystyrene foam.

The plate-shaped material transport container 1 containing the plate-shaped material 23 is usually stored in a moisture-proof bag 12 as illustrated in FIG. 6 during transportation. As the moisture-proof bag 12, an aluminum moisture-proof bag is preferably used. Usually, the aluminum moisture-proof bag is made of an electrostatic-shielding moisture-proof film, and a laminated sheet in which a film material and an aluminum sheet are laminated is preferably used as the electrostatic-shielding moisture-proof film.

Further, as shown in FIG. 6, a label 13 having a label printing portion 14 is generally attached to the surface of the moisture-proof bag 12 containing the plate-shaped material transport container 1. Then, as shown in FIG. 7, the moisture-proof bag 12 containing the plate-shaped material transport container 1 is housed in the corrugated cardboard box body 19. At this time, the cushioning material 18 is attached to the outer surface side of the moisture-proof bag 12 to form a combination, and the combination is inserted into the corrugated cardboard box 19 to form a transport container package, and a plate-shaped transport container is formed. The packing state of 1 is formed. Then, the plate-shaped material transport container 1 is transported in this packed state. As the cushioning material 18, a material made of a foam molded body formed into a shape matching the shape of the gap between the box body 19 and the plate-shaped material transport container 1 is preferably used.

Further, according to the plate-shaped material transport container 1 of the present invention, the risk of damage to the moisture-proof bag can be effectively suppressed. Further, according to the plate-shaped material transport container 1, the risk of the label printing portion disappearing can be effectively suppressed even if the label-shaped material is transported in a packed state.

Next, it will be described in more detail below with reference to Examples and Comparative Examples. However, the present invention does not have to be limited to these examples.

Example 1
First, the container body and the lid constituting the plate-shaped material transport container as shown in FIGS. 1 to 4 are injection-molded with the following raw material resin compositions in the mold corresponding to each shape. Molded in. As the raw material resin composition, a conductive resin composition was prepared by adding a conductive filler (carbon black) to polypropylene resin (Prime Polypro (trademark), J705ZA manufactured by Prime Polymer Co., Ltd.). The amount of the conductive filler added to the raw material resin composition was adjusted so that the surface resistance value of the plate-shaped material transport container was in the range of ¹⁰¹ Ω or more and ¹⁰⁶ Ω or less. For the surface resistance value, refer to IEC 61340-5-1, and use a resistance measurement system (manufactured by PROSTAT Co., Ltd., model number: PRS-801, probe used: PRF-922B) to measure the surface resistance value (Ω) of the surface of the molded body. Measured using. The surface resistance value of the plate-shaped material transport container of Example 1 was in the range of ^{approximately} 103 Ω or more and ¹⁰⁴ Ω or less.

The obtained plate-shaped material transport container is stored in a moisture-proof bag (aluminum moisture-proof bag (Achilles Corporation, Moisture Barrier Bag, thickness: 93 μm)), and a bag tearability confirmation test and a print loss confirmation test are carried out as follows. did.

(Bag tear confirmation test)
The bag tearability confirmation test was carried out by the following drop test. The drop test was carried out in accordance with ISO2248. That is, the plate-shaped material transport container packaged in the moisture-proof bag is set in a drop tester (DTS-100 type drop tester manufactured by Shinei Technology Co., Ltd.) and falls freely from a drop height of 120 cm (fall direction: 1 angle, 3 ridges, 6 sides). Then, it was visually confirmed whether or not the plate-shaped material transport container packaged in the moisture-proof bag after the fall and the moisture-proof bag were torn (bag-breaking property). As a result, no tearing of the moisture-proof bag was observed.

(Print loss confirmation test)
The print loss confirmation test was carried out by the following vibration test. First, a label having a label printing portion was attached to the surface side of the portion of the surface of the plate-shaped material transport container facing the corner of the moisture-proof bag. In addition, a corrugated cardboard box body for accommodating a plate-shaped material transport container packaged in a moisture-proof bag in advance is prepared, and foam formed in a shape matching the shape of the gap between the box body and the plate-shaped material transport container. A cushioning material made of a molded body was prepared. A cushioning material was attached to the outer surface side of the moisture-proof bag to form a combination of the plate-shaped material transport containers packaged in the moisture-proof bag, and the combination was inserted into a cardboard box. In this way, the plate-shaped material transport container packaged in the moisture-proof bag was packed in a corrugated cardboard box to obtain a transport container package.

A vibration test was carried out in accordance with ISTA 2A using the contents packed in the transport container. In the vibration test, a vibration tester (G-9230L type manufactured by Shinken Co., Ltd.) was used to apply random vibration (vibration frequency: 1 Hz to 200 Hz) to the packaged container (vibration frequency: 60 minutes). After applying random vibration, the package of the transport container was opened, and it was confirmed whether or not the content printed on the label printing part of the label attached to the moisture-proof bag containing the plate-shaped transport container had disappeared. As a result, no loss of printed content was observed in the label printing section.

Comparative Example 1
A transport container (comparative transport container) having the same structure as the plate-shaped material transport container prepared in Example 1 was formed except that there was no inclined surface. The comparative transport container was molded using the same raw material resin composition and molding method as in Example 1.

The surface resistance value of the comparative transport container was measured in the same manner as in Example 1, and after the plate-shaped transport container was stored in an aluminum moisture-proof bag, a bag tearability confirmation test and a print loss confirmation test were performed. It was implemented. As a result, the surface resistance value of the plate-shaped material transport container of Example 1 was in the range of about ¹⁰³ Ω or more and ¹⁰⁴ Ω or less. In the bag tearability confirmation test, the aluminum moisture-proof bag was found to be torn, and in the print loss confirmation test, the printed content was found to be lost in the label printing section.

1 Plate-shaped material transport container 2 Container body 3 Cover body 4 Bottom plate 5 Plate-shaped material storage space 6 Standing wall part 6a Notch part 7 Side wall 8 Inner wall structure 9 Corner part 10 Top plate 11 Hanging side wall part 12 Moisture-proof bag 13 Label 14 Label printing part 15 First covering part 16 Second covering part 17 Inclined surface 18 Cushioning body 19 Box body 20 Locking claw 21 Locking piece 22 Locking hole 23 Plate-like material 24 Cushion material 25 Ring spacer

Claims (3)

A container body having a bottom plate, a standing wall portion rising from a predetermined position in the upper surface of the bottom plate, and a plate-shaped object accommodating space surrounded by the standing wall portion.
It is provided with a top plate having corners on the outer periphery and a lid body provided with a hanging side wall portion hanging from the lower surface side of the top plate and formed so as to be attached to the container body.
With the lid attached to the container body, the hanging side wall covers the outer surface of the standing wall, and in the plan view of the lid, the top plate covers the upper surface side of the bottom plate and faces the plate-shaped object storage space. A plate-shaped material transport container configured such that a predetermined portion including is formed as a first covering portion and an outer portion of the first covering portion is formed as a second covering portion.
The second covering portion of the top plate is directed from the boundary line formed at the boundary position between the first coating portion and the second coating portion to a predetermined portion of the outer peripheral edge of the top plate including the portion corresponding to the corner portion. An inclined surface that is inclined downward and is inclined downward from the straight line while being orthogonal to the straight line in the plan view of the top plate based on the position on the straight line connecting the tip of the corner and the center of the top plate. A plate-shaped material transport container, characterized in that the above-mentioned is formed. The plate-shaped material transport container according to claim 1, wherein the top plate is formed in a shape in which the first covering portion is raised above the second covering portion. The plate-shaped material transport container according to claim 1 or 2, wherein a predetermined region of the first covering portion and / or a predetermined region of the hanging side wall portion is formed in a smooth surface shape.

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