Tray system and tray stack system

Abstract

The invention provides a tray system and a tray stack system. The tray system may include a tray. The tray may include: a tray body portion; a loading portion formed in the tray main body portion and accommodating an object; a stopper formed in the loading portion and positioned on one side of the object accommodated in the loading portion; and a step portion in which a step is formed in a portion of the stopper.

Description

[0001] This application claims the priority of Korean Patent Application No. 10-2024-0015592, filed with the Korean Intellectual Property Office on February 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The disclosure relates to a tray system and a tray stack system. Background Art

[0003] With the development of the information society, various demands for display devices are continuously increasing. For example, display devices are being adopted by various electronic devices such as smart phones, digital cameras, laptop computers, navigation devices, and smart TVs.

[0004] As such display devices, various types of display devices such as liquid crystal display (LCD) devices and organic light emitting display (OLED) devices are currently used. Among various types of display devices, an organic light emitting display device displays an image by using an organic light emitting element that emits light when electrons and holes are recombined. Such an organic light emitting display device includes a plurality of transistors for supplying a driving current to the organic light emitting element.

[0005] In particular, display panels such as organic light emitting display panels are becoming smaller and thinner. Therefore, it may be necessary to prevent defects from occurring during the process of loading and transporting a display device including such a display panel.

[0006] Generally, during various manufacturing processes, a display device can be loaded, transported, and stored on a tray. Even after the processing of the display device has been completed, a tray for the completed display device can be prepared, and the display device can be loaded onto such a tray for packing and transportation.

[0007] A single display device can be loaded and transported on a single tray. However, in order to improve process efficiency and loading efficiency, it may be desirable to load, transport, and store a plurality of display devices simultaneously. Therefore, a plurality of trays can be stacked on top of each other for storage and transportation.

[0008] Previously, in a stack of trays, a display device loaded on a tray could be damaged by the tray above it.

[0009] For example, a stopper protruding downward can be formed in the bottom surface of the tray to prevent warping of the tray. In a stack of trays, the stoppers of each tray face the display devices mounted on adjacent trays.

[0010] In a stack of such trays, a stopper of an upper tray may come into contact with a display device mounted on a lower tray. The stopper may come into contact with a cover sheet that may be positioned on the surface of the display device to protect the display device, and thus the cover sheet that adheres to the surface of the display device may be pressed by the stopper, resulting in contamination of the surface of the display device. In particular, if the cover sheet has a pattern or color, then the pattern or color may transfer to the surface of the display device, thereby contaminating it. Summary of the Invention

[0011] The disclosed aspects provide a tray system and a tray stack system that can prevent a stopper, which may be a lower structure of a tray, from contaminating the surface of an object mounted on an adjacent tray.

[0012] However, the disclosed aspects are not limited to the aspects set forth herein. By referring to the detailed disclosure given below, the above and other aspects of the disclosure will become clearer to those of ordinary skill in the art to which the disclosure pertains.

[0013] According to the disclosed aspects, a tray system may include a tray, wherein the tray may include: a tray body portion; a loading portion formed in the tray body portion and accommodating an object; a stopper formed in the loading portion and positioned on one side of the object accommodated in the loading portion; and a stepped portion having a step formed in a part of the stopper.

[0014] In an embodiment, the loading portion may be formed at the center of the tray body portion.

[0015] In an embodiment, the loading portion may be recessed downward from the tray body portion to have the same shape as the object.

[0016] In an embodiment, the loading portion may further include: a bottom surface on which the object may be placed, and wherein the stopper and the stepped portion may be formed on the bottom surface of the loading portion.

[0017] In an embodiment, the stopper may project downward from the bottom surface.

[0018] In an embodiment, the stopper may have a rectangular shape along the periphery of the loading portion in a plan view.

[0019] In an embodiment, the stopper may include a semi-circular cross-sectional shape.

[0020] In an embodiment, the height from the bottom surface of the loading portion to the lower surface of the stopper may be greater than the height from the bottom surface of the loading portion to the lower surface of the stepped portion.

[0021] In an embodiment, the stepped portion may project downward from the bottom surface at the said part of the stopper.

[0022] In an embodiment, the stepped portion may include a semi-circular cross-sectional shape.

[0023] In an embodiment, the tray system may further include: an object, wherein an upper protective film and a lower protective film may be respectively positioned on an upper surface and a lower surface of the object.

[0024] In an embodiment, the lower protective film may further include: an opening that exposes a part of the lower surface of the object.

[0025] In an embodiment, the object may further include: an upper cover sheet and a lower cover sheet, which are respectively positioned on the upper protective film and the lower protective film.

[0026] In an embodiment, the lower cover sheet may be positioned on the lower protective film to close the opening of the lower protective film and may be in contact with the lower protective film.

[0027] In an embodiment, the stepped portion may overlap with the opening in a plan view.

[0028] In an embodiment, the tray main body portion may further include: a guide groove formed at an edge of the loading portion to guide the removal of the object.

[0029] In an embodiment, the tray main body portion may have a rectangular shape.

[0030] According to another aspect of the disclosure, a tray stack system may include a plurality of trays sequentially stacked on one another, wherein each of the plurality of trays may include: a tray main body portion; a loading portion formed in the tray main body portion and accommodating an object; a stopper formed in the loading portion and positioned on one side of the object accommodated in the loading portion; and a stepped portion having a step formed in a part of the stopper.

[0031] In an embodiment, the plurality of trays may include a first tray and a second tray. The first tray accommodates an object in the loading portion, the second tray is stacked on the first tray, the object of the first tray may be in contact with the stopper of the second tray, and the object of the first tray may be spaced apart from the stepped portion of the second tray.

[0032] In an embodiment, the tray stack system may further include an object, wherein the object may further include an upper protective film and a lower protective film respectively positioned on an upper surface and a lower surface of the object, and an upper cover sheet and a lower cover sheet respectively positioned on the upper protective film and the lower protective film. The lower protective film may further include an opening covered by the lower cover sheet, and the opening of the lower protective film of the object in the first tray may overlap with the stepped portion of the second tray in the thickness direction of the plurality of trays.

[0033] By describing the disclosed embodiments in detail with reference to the accompanying drawings, the above and other features and advantages of the disclosure will become clearer.

[0034] In a stack of trays according to the disclosed embodiments, a stepped portion formed in a stopper of a tray may be spaced apart from a surface of an object loaded on an adjacent tray. Accordingly, it may be possible to prevent a cover sheet positioned between a stopper and an object loaded on an adjacent tray from being attached to the surface of the object when the cover sheet is pressed by the stopper in a conventional tray. It may be possible to prevent a pattern or color of the cover sheet from being transferred to the surface of the object and to prevent contamination of the surface of the object.

[0035] Since the pattern or color of the cover sheet is not transferred to the label sticker of the object, a stopper may be formed at a desired position without considering a position where the label sticker may be exposed, that is, without avoiding the label sticker. For example, the stopper may be positioned outside the object, thereby reducing a risk such as deformation of the tray.

[0036] It should be noted that the disclosed effects are not limited to the above effects, and according to the following description, other disclosed effects will be clear to those skilled in the art.

[0037] However, the disclosed effects are not limited to the foregoing effects, and various other effects may be included in the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other aspects and features of the disclosure will become clearer by describing the disclosed embodiments in detail with reference to the drawings.

[0039] Figure 1 is a perspective view showing an object loaded on a tray according to an embodiment.

[0040] Figure 2 is showing a loading on Figure 1 a schematic cross-sectional view of one side of an object on a tray of.

[0041] Figure 3 is showing Figure 2 a bottom view of the bottom of an object attached with a lower protective film without including a lower cover sheet in.

[0042] Figure 4 is Figure 1 a perspective view of a tray of.

[0043] Figure 5 is Figure 4 a top plan view of a tray of.

[0044] Figure 6 is positioned in Figure 4 an enlarged view of a stopper and a stepped portion in region A of.

[0045] Figure 7 is along Figure 6as shown by the section taken along line XI-XI' Figure 6 An enlarged perspective schematic sectional view of the stopper and the stepped portion.

[0046] Figure 8 is along Figure 6 as shown by the section taken along line XII-XII' Figure 6 An enlarged schematic sectional view of the stopper and the stepped portion.

[0047] Figure 9 is along Figure 6 as shown by the section taken along line XIII-XIII' Figure 6 An enlarged schematic sectional view of the stopper.

[0048] Figure 10 is along Figure 6 as shown by the section taken along line XIV-XIV' Figure 6 An enlarged schematic sectional view of the stopper and the stepped portion.

[0049] Figure 11 is a perspective view of a pallet stack formed by continuously stacking Figure 4 pallets.

[0050] Figure 12 shows the manner of loading an object onto the pallet of the Figure 11 pallet stack.

[0051] Figure 13 shows an object first loaded into the pallet of Figure 12 before attaching the Figure 12 lower cover sheet.

[0052] Figure 14 is a perspective view of a pallet stack formed by stacking a plurality of pallets with objects loaded thereon according to Figure 13 ...

[0053] Figure 15 shows Figure 14 an enlarged schematic sectional view of the first pallet for accommodating an object and the second pallet stacked on the first pallet in area B of

[0054] Figure 16 is along Figure 15 as shown by the section taken along line XV-XV' Figure 15 of the first pallet for accommodating an object and the second pallet stacked on the first pallet.

[0055] Figure 17 is along Figure 15 as shown by the section taken along line XVI-XVI' Figure 15Schematic cross-sectional view of a first tray for accommodating an object and a second tray stacked on the first tray. Detailed implementation

[0056] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments or implementations disclosed herein. As used herein, "embodiment" and "implementation" are interchangeable terms that serve as non-limiting examples of the apparatus or method disclosed herein. However, it is clear that the various embodiments may be practiced without these specific details or with one or more equivalent arrangements. Here, the various embodiments need not be exclusive and need not limit the disclosure. For example, the specific shapes, configurations, and characteristics of an embodiment may be used or implemented in another embodiment.

[0057] Unless otherwise stated, the embodiments shown should be understood to provide the disclosed features. Thus, without departing from the inventive concept, unless otherwise stated, the features, components, modules, layers, films, panels, regions, and / or aspects, etc. (hereinafter, individually or collectively referred to as "elements") of the various embodiments may be additionally combined, separated, interchanged, and / or rearranged.

[0058] The use of cross-hatching and / or shading in the drawings is generally provided to clarify the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonality between the elements shown, and / or any other characteristics, attributes, properties, etc. of the elements. Additionally, in the drawings, for clarity and / or descriptive purposes, the dimensions and relative dimensions of the elements may be exaggerated. When the embodiments can be implemented differently, a specific process order may be performed differently from the described order. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to the described order. Furthermore, the same reference numerals and / or reference symbols denote the same elements.

[0059] When an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, it can be directly on, directly connected to, or directly coupled to the other element or layer, or intervening elements or layers may be present. However, when an element or layer is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, no intervening elements or layers are present. For this reason, the term "connected" can refer to physical, electrical, and / or fluid connection with or without intervening elements. Additionally, the X-axis, Y-axis, and Z-axis (or the first direction DR1, second direction DR2, and third direction DR3) are not limited to the three axes of a rectangular coordinate system (such as the x-axis, y-axis, and z-axis) and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis can be perpendicular to each other, or they can be different directions that are not perpendicular to each other.

[0060] For the purposes of this disclosure, "at least one of A and B" can be interpreted as only A, only B, or any combination of A and B. Additionally, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0061] Although terms such as "first", "second", etc. may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Thus, the first element discussed below can be referred to as the second element without departing from the teachings of the disclosure.

[0062] For descriptive purposes, spatial relative terms such as "under", "below", "beneath", "lower", "above", "upper", "on", "higher", and "side" (e.g., as in "sidewall") may be used herein to describe the relationship of one element to another (or elements) as shown in the figures. In addition to the orientation depicted in the figures, spatial relative terms are intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the figures is flipped, an element described as "under" or "below" other elements or features will then be oriented "above" the other elements or features. Thus, the term "under" can encompass both an upper and a lower orientation. Additionally, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptors used herein are to be interpreted.

[0063] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly dictates otherwise, the singular forms "a," "an," and "the" are also intended to include the plural forms. Additionally, when the terms "comprises" and / or "comprising" and variations thereof are used in this specification, it is specified that the stated features, integers, steps, operations, elements, components, and / or groups thereof exist, but do not preclude the existence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as terms of degree, and thus are used to interpret the inherent deviations of measured, calculated, and / or provided values that would be recognized by a person of ordinary skill in the art.

[0064] Various embodiments are described herein with reference to cross-sectional views and / or exploded views that are schematic illustrations of embodiments and / or intermediate structures. As such, variations in the shapes of the illustrations due to, for example, manufacturing techniques and / or tolerances are to be expected. Accordingly, the embodiments disclosed herein should not necessarily be construed as limited to the particular shapes shown in the regions, but rather include shape deviations caused by, for example, manufacturing. In this manner, the regions shown in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and thus are not necessarily intended to be limiting.

[0065] In accordance with the convention in the art, some embodiments are described and illustrated in the drawings in terms of functional blocks, components, and / or modules. Those skilled in the art will understand that these blocks, components, and / or modules are physically implemented by electronic (or optical) circuits such as logic circuits, discrete components, microprocessors, hardwired circuits, memory elements, and wiring connections, which may be formed using semiconductor-based manufacturing techniques or other manufacturing techniques. In the case where the blocks, components, and / or modules are implemented by a microprocessor or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and may optionally be driven by firmware and / or software. It is also contemplated that each block, component, and / or module may be implemented by dedicated hardware, or as a combination of dedicated hardware and a processor (e.g., one or more programmed microprocessors and associated circuits) that performs some functions. Additionally, without departing from the scope of the inventive concept, each block, component, and / or module of some embodiments may be physically separated into two or more interacting and discrete blocks, components, and / or modules. Further, without departing from the scope of the inventive concept, the blocks, components, and / or modules of some embodiments may be physically combined into more complex blocks, components, and / or modules.

[0066] Unless otherwise defined or implied herein, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0067] Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings.

[0068] Figure 1 is a perspective view showing an object loaded on a tray according to an embodiment.

[0069] Referring to Figure 1 , the tray 100 can accommodate an object (or an object to be loaded) 200 at its center to protect it. The tray 100 can accommodate the object 200 such that a lower cover sheet 221 attached to the bottom of the object 200, which will be described later, can be exposed on the upper side.

[0070] The tray 100 can accommodate only a single object 200, but the disclosure is not limited thereto. A plurality of objects 200 can be mounted on a single tray 100.

[0071] Figure 2 is a schematic cross-sectional view showing Figure 1 one side of the object.

[0072] Referring to Figure 2 , the object 200 can be loaded on Figure 1 the tray 100 for storage or transportation.

[0073] The object 200 can be, for example, an electronic device or a display device. Examples of the display device can include an organic light-emitting display device, a micro LED display device, a nano LED display device, a quantum dot light-emitting display device, a liquid crystal display device, a plasma display device, a field emission display device, an electrophoretic display device, an electro-wetting display device, etc. The display device can be applied to electronic devices such as smart phones, smart watches, tablet PCs, and laptop computers (such as notebook computers).

[0074] Such a display device can include a substrate. The display device can be manufactured by forming various thin films on the substrate and processing the various thin films. The display device during the process of the process before processing and the completed display device after processing can be loaded on the tray 100 for transportation and storage.

[0075] The object 200 can be any one of various devices such as a smart phone, a tablet PC, or a laptop computer (such as a notebook computer). For example, when the laptop computer can be used as the object 200, it can include a display unit and a main computer. The display unit includes a display panel, and the display panel can be an upper device 202 positioned on the upper side of the position where the user uses the laptop computer, and the main computer can be a lower device 201 positioned on the lower side.

[0076] It should be noted that although the laptop computer can be described as an example of the object 200 to be loaded, the disclosure is not limited thereto. For example, when the object 200 is a smart phone or a tablet PC, the front-side display can correspond to the upper device 202, and the back cover can correspond to the lower device 201.

[0077] Referring to Figure 2 , the object 200 can include a lower surface 201a and an upper surface 202a that can be the outer surface, but is not limited thereto. In an embodiment, the object 200 can further include a pair of lower protective films 211 and upper protective films 212, and a pair of lower cover sheets 221 and upper cover sheets 222 at the outermost position.

[0078] A pair of lower protective films 211 and upper protective films 212 can be respectively attached to the lower surface 201a and the upper surface 202a so that the lower surface 201a of the object 200 and the upper surface 202a of the object 200 can be protected from external impacts and external forces. The outer surface of the object 200 can be covered by the lower protective films 211 and the upper protective films 212, so that the object 200 can not be exposed (for example, directly exposed) to the outside.

[0079] A pair of lower protective films 211 and upper protective films 212 can include at least one of a polyethylene terephthalate (PET) film, a polypropylene (PP) film, and a polyethylene (PE) film, but the disclosure is not limited thereto. They can be formed as plastic films of various materials and can be formed as transparent films or opaque films.

[0080] A pair of lower cover sheets 221 and upper cover sheets 222 can be positioned at the outermost position of the object 200.

[0081] For example, a pair of lower cover sheets 221 and upper cover sheets 222 can be formed as a PE film, and can also be formed as a transparent film or a patterned film or a colored film.

[0082] A pair of lower cover sheets 221 and upper cover sheets 222 can have the same size as the object 200, or can have a size smaller than or larger than the object 200.

[0083] A pair of lower cover sheets 221 and upper cover sheets 222 can be respectively attached to a pair of lower protective films 211 and upper protective films 212 to protect the object 200 from external impacts or external forces at the outermost position. In particular, in a stack of trays 100, it is possible to prevent the object 200 on the tray 100 from being damaged by other trays 100 in the stack.

[0084] As Figure 2 shown, a pair of lower cover sheets 221 and upper cover sheets 222 can be stacked on the object 200. The object 200 including the lower cover sheet 221 and the upper cover sheet 222 can be mounted on the tray 100 as Figure 1 shown, but is not limited thereto. For example, before the object 200 can be mounted on Figure 1 the tray 100, the upper cover sheet 222 can first be received in the tray 100, the object 200 with a pair of lower protective films 211 and upper protective films 212 attached thereto can be received in the tray 100 including the upper cover sheet 222, and then the lower cover sheet 221 can be disposed on the lower protective film 211 attached to the object 200.

[0085] The object 200 can include the lower surface 201a of the lower device 201 of the object 200 and the upper surface 202a of the upper device 202 of the object 200 as outer surfaces forming the appearance.

[0086] The upper surface 202a of the object 200 can be received in the tray 100, and the lower surface 201a of the object 200 can be exposed to the upper side of the tray 100.

[0087] Figure 3 is a bottom view showing the bottom of an object attached with a lower protective film and not including a lower cover sheet in Figure 2 .

[0088] Referring to Figure 3 , the object 200 can further include a label sticker 203 that can be attached to a part of the lower surface 201a of the object 200 and can display device information.

[0089] The label sticker 203 can be attached to the lower surface 201a of the object 200. The label sticker 203 can be exposed to the outside through an opening 211b in the lower protective film 211 covering the lower surface 201a of the object 200.

[0090] The lower protective film 211 can include a protective surface 211a that protects the entire lower surface 201a of the object 200 and an opening 211b that exposes the label sticker 203 to the outside.

[0091] The protective surface 211a may refer to the entire lower protective film 211 except for the opening 211b, and may cover the portion of the lower surface 201a of the object 200 that is outside the label sticker 203.

[0092] The opening 211b may be formed by cutting a part of the lower protective film 211, and may expose a part of the lower surface 201a of the object 200 and the label sticker 203 to the outside.

[0093] By disposing the lower cover sheet 221 on the lower protective film 211, the protective surface 211a of the lower protective film 211, and the opening 211b, the label sticker 203 exposed by the opening 211b and the portion of the lower surface 201a exposed by the opening 211b may be covered by the lower cover sheet 221, and thus the lower cover sheet 221 may be finally exposed to the outside as shown in Figure 1 shown.

[0094] Figure 4 is Figure 1 a perspective view of the tray of Figure 5 is Figure 4 a top plan view of the tray of Figure 6 is a stop and a step portion located in Figure 4 region A of Figure 7 is along Figure 6 line XI-XI' of Figure 6 showing an enlarged perspective schematic cross-sectional view of the stop and the step portion of Figure 8 is along Figure 6 line XII-XII' of Figure 6 showing an enlarged schematic cross-sectional view of the stop and the step portion of Figure 9 is along Figure 6 line XIII-XIII' of Figure 6 showing an enlarged schematic cross-sectional view of the stop of Figure 10 is along Figure 6 line XIV-XIV' of Figure 6 showing an enlarged schematic cross-sectional view of the stop and the step portion of

[0095] Referring to Figure 4 , the tray 100 may form a space for accommodating the object 200 at the center, and accommodate the object 200 to prevent damage to the object 200 during transportation.

[0096] The tray 100 may be formed of various materials, and considering process convenience and manufacturing cost, may include an injectable polymer compound.

[0097] The polymeric compound may include at least one of polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS) copolymer, and polystyrene (PS). The tray 100 may preferably be made of an ABS resin (acrylonitrile butadiene styrene copolymer), but the disclosure is not limited thereto.

[0098] Referring to Figure 4 , the tray 100 may include a loading portion 110 and a tray main body portion 120. The object 200 may be accommodated in the loading portion 110, and the tray main body portion 120 forms the appearance of the tray 100.

[0099] The tray main body portion 120 may form the appearance of the tray 100 having a rectangular shape with a long side in the first direction DR1 (see Figure 1 ) and a short side in the second direction DR2 (see Figure 1 ), and the loading portion 110 may be positioned at the center of the tray main body portion 120. The shape of the tray main body portion 120 may not be limited to a rectangular shape, but may be formed in various shapes.

[0100] The tray main body portion 120 may include a stacking support 112, an object support 113, and a guide groove 130 formed at an edge that may be the periphery of the loading portion 110.

[0101] The stacking support 112 may have a groove shape at the top and a downward protruding shape at the bottom. A plurality of stacking supports 112 may be formed along the periphery of the tray 100 and formed at the same positions in the same shape for different trays 100. Thus, the stacking supports 112 can be combined with each other to support a plurality of trays 100 stacked on each other in sequence.

[0102] A plurality of object supports 113 may be arranged adjacent to the loading portion 110 along the peripheral direction of the loading portion 110 to support the side surface of the object 200 accommodated in the loading portion 110.

[0103] The guide groove 130 may be used to unload the object 200 from the loading portion 110. For example, the finger or a specific tool of an operator or user may be inserted into the guide groove 130 to separate the object 200 accommodated in the loading portion 110 from the loading portion 110, or to place the object 200 in the loading portion 110. Thus, the object 200 can be easily loaded into and unloaded from the loading portion 110 through the guide groove 130.

[0104] The loading portion 110 may form a space in which the object 200 can be accommodated and may be formed to have dimensions equal to those of the object 200 such that the object 20 can be fitted into the loading portion 110.

[0105] The shape of the loading portion 110 can conform to the shape of the object 200. For example, the loading portion 110 can have a rectangular shape as shown in Figure 4 and Figure 5 .

[0106] The loading portion 110 can be a space recessed downward from the plate surface of the upper surface 121 of the tray main body portion 120, and can include a bottom surface 111 on which the object 200 can be placed, a stopper 150 formed in the bottom surface 111, and a stepped portion 151.

[0107] Referring to Figure 5 , the stopper 150 can be formed in a hollow rectangular shape along the periphery of the tray 100 in the bottom surface 111. The overall shape of the stopper 150 can be formed in various shapes such as a polygon and an ellipse. However, it should be understood that the disclosed embodiments are not limited thereto.

[0108] Referring to Figure 6 and Figure 7 , the stopper 150 can protrude downward from the bottom surface 111 of the loading portion 110, and can have a schematic cross-sectional shape of a semi-ellipse (or semi-circle).

[0109] Referring to Figure 8 and Figure 9 , the height H1 from the bottom surface 111 of the loading portion 110 to the lower surface 150a of the stopper 150 can be greater than the height H2 from the bottom surface 111 of the loading portion 110 to the lower surface 151a of the stepped portion 151, and the height H1 can be the height by which the stopper 150 protrudes downward.

[0110] In the case of stacking and transporting a plurality of trays 100, the stopper 150 can contact the object 200 accommodated in the adjacent tray 100 located below the stopper 150 to inhibit the vertical movement of the object 200 and prevent damage to the object 200.

[0111] The stopper 150 can be formed along the periphery of the bottom surface 111 of the tray 100 (e.g., the loading portion 110) so that the stopper 150 can enhance the strength of the lower part of the tray 100. In particular, it can be possible to prevent the appearance of the tray 100 from changing due to the storage environment and transportation environment of the tray 100. For example, it can be possible to prevent the warping or deformation of the tray 100.

[0112] Referring to Figure 10 , the stepped portion 151 can be formed in a specific part of the stopper 150. The stepped portion 151 can have a height H2, and the height H2 forms a step with the height H1 of the stopper 150.

[0113] For example, the height H2 from the bottom surface 111 of the loading portion 110 to the lower surface 151a of the stepped portion 151 may be less than the height H1 from the bottom surface 111 of the loading portion 110 to the lower surface 150a of the stopper 150.

[0114] The stepped portion 151 may be formed in the stopper 150 such that, when the object 200 is received in the tray 100, the stepped portion 151 may overlap with the label sticker 203 of the object 200 in a plan view (or in the thickness direction of the tray 100). The stepped portion 151 may have a schematic cross-sectional shape that is semi-elliptical (or semi-circular).

[0115] Therefore, when the trays 100 are continuously stacked on top of each other, since the height H2 of the stepped portion 151 can be small, the stepped portion 151 can be spaced apart from the lower cover sheet 221 of the object 200 received in the adjacent tray 100 positioned below the stepped portion 151 (i.e., the stepped portion 151 may not contact the lower cover sheet 221), thereby being able to prevent the lower cover sheet 221 from being pressed by the stepped portion 151 and prevent contamination of the object 200.

[0116] Hereinafter, a method of loading the object 200 onto the tray 100 and a tray stack 1000 formed by continuously stacking the trays 100 with the loaded object 200 will be described.

[0117] Figure 11 is a perspective view of a tray stack formed by continuously stacking Figure 4 trays. Figure 12 is a view showing the manner of loading an object onto Figure 11 one tray of the tray stack. Figure 13 is a view showing an object that is first loaded into Figure 12 the tray before attaching Figure 12 the lower cover sheet. Figure 14 is a perspective view of a tray stack formed by stacking a plurality of trays having objects loaded thereon according to Figure 13 the above.

[0118] Referring to Figure 11 , the tray stack 1000 may be formed by sequentially stacking individual trays 100 having the same shape and structure in the vertical direction (e.g., the third direction DR3).

[0119] The object 200 may be mounted on a single tray 100 of the tray stack 1000 as follows.

[0120] Referring to Figure 12, the upper cover sheet 222 can be positioned in a plan view at a position overlapping with the loading section 110 of the tray 100. An object 200 with a lower protective film 211 and an upper protective film 212 attached thereto can be positioned on the loading section 110 including the upper cover sheet 222, and the lower cover sheet 221 can be placed above the lower protective film 211, and the lower protective film 211 is disposed on the object 200 disposed on the loading section 110.

[0121] When doing so, the lower protective film 211 can be positioned on the upper side (i.e., the label sticker 203 can be positioned on the upper side), and the upper protective film 212 can be positioned to face the upper cover sheet 222 that can contact the bottom surface 111 of the loading section 110.

[0122] As Figure 12 prepared as shown in, the upper cover sheet 222 can be placed on the bottom surface 111 of the loading section 110, and then the object 200 can be stacked on the upper cover sheet 222 placed on the bottom surface 111 of the loading section 110, so that the object 200 can be received in the loading section 110.

[0123] Referring to Figure 13 , the object 200 can be received, and the lower protective film 211 is on the upper side (i.e., the label sticker 203 is positioned on the upper side). The lower cover sheet 221 can be positioned on the lower protective film 211, and the upper protective film 212 can contact the upper cover sheet 222 positioned on the bottom surface 111.

[0124] At this time, the portion of the lower surface 201a of the object 200 exposed to the upper side and the label sticker 203 can overlap with the stepped portion 151 in a plan view (or can be positioned on the same vertical axis (or third direction) DR3 as the stepped portion 151), and the vertical axis DR3 can be the thickness direction of the tray 100.

[0125] Referring to Figure 14 , the lower cover sheet 221 can be attached to the lower protective film 211 so that the label sticker 203 exposed through the opening 211b and the portion of the lower surface 201a of the object 200 exposed through the opening 211b can be covered.

[0126] In this way, the lower cover sheet 221 can be finally exposed to the upper side. Although in the example shown in Figures 12 to 14 , the upper cover sheet 222, the object 200, and the lower cover sheet 221 can be stacked separately and sequentially, the order and method of stacking them are not limited thereto. For example, the upper cover sheet 222, the object 200, and the lower cover sheet 221 can be formed as one piece and can be received in the loading section 110 at one time.

[0127] As Figure 14As shown, trays 100 that accommodate objects 200 with lower cover sheets 221 attached thereto can be stacked sequentially in the vertical direction (e.g., the third direction DR3) to form a tray stack 1000.

[0128] After fully loading each of the objects 200 into the tray stack 1000 as described above, a detailed description will be given with reference to Figures 15 to 17 the objects 200 accommodated in, for example, a first tray 100a and a second tray 100b that form the tray stack 1000.

[0129] Figure 15 is an enlarged schematic cross-sectional view showing Figure 14 a first tray that accommodates an object and a second tray stacked on the first tray in region B. Figure 16 is taken along Figure 15 line XV-XV' of Figure 15 and is a schematic cross-sectional view showing a first tray that accommodates an object and a second tray stacked on the first tray. Figure 17 is taken along Figure 15 line XVI-XVI' of Figure 15 and is a schematic cross-sectional view showing a first tray that accommodates an object and a second tray stacked on the first tray.

[0130] With reference to Figure 15 , in the case where the first tray 100a and the second tray 100b are stacked sequentially on each other, the object 200 placed on the first tray 100a can be positioned between the stopper 150 and the stepped portion 151 of the first tray 100a and the second tray 100b.

[0131] With reference to Figure 16 , the object 200 placed on the first tray 100a can be oriented such that the label sticker 203 of the object 200 and the opening 211b of the lower protective film 211 can overlap with the stepped portion 151 of the second tray 100b provided above the object 200 in a plan view and can be spaced apart from the stepped portion 151 of the second tray 100b.

[0132] As described above, in the region where the label sticker 203 and the opening 211b are located, the stepped portion 151 of the second tray 100b and the lower cover sheet 221 of the object 200 attached to the first tray 100a may not contact each other. Therefore, on the upper side of the region where the label sticker 203 and the opening 211b are located, the lower cover sheet 221 may not be pressed by the stepped portion 151 of the second tray 100b.

[0133] Therefore, the lower cover sheet 221 may not be pressed by the stepped portion 151 of the second tray 100b, so that it is possible to avoid the lower cover sheet 221 being pressed and transferred to the surface of the object 200 on the first tray 100a through the opening 211b of the lower protective film 211 of the object 200 attached to the first tray 100a. Therefore, it is possible to prevent the surface of the lower device 201 of the object 200 from being contaminated by the lower cover sheet 221.

[0134] Referring to Figure 17 , when the first tray 100a and the second tray 100b are continuously stacked on each other, the object 200 placed on the first tray 100a may be pressed by the stopper 150 of the second tray 100b positioned on the object 200, and the stopper 150 is at a position outside (or excluding the stepped portion 151) of the stepped portion 151 of the second tray 100b. Therefore, the position of the object 200 placed on the first tray 100a may be supported by the second tray 100b positioned thereon. At this time, the lower cover sheet 221 of the object 200 placed on the first tray 100a may contact the stopper 150 of the second tray 100b positioned thereon.

[0135] In this way, the position of the object 200 placed on the first tray 100a may be supported by the stopper 150 of the second tray 100b, and the stopper 150 is at a position outside the stepped portion 151 of the second tray 100b. Therefore, it is possible to suppress damage to the object 200 placed on the first tray 100a while the tray stack 1000 can be transported.

[0136] In this way, according to the disclosed embodiment, since the stepped portion 151 may be formed in the stopper 150 which may be the lower structure of the tray 100, the stepped portion 151 may not contact the lower cover sheet 221, so that it is possible to prevent the lower cover sheet 221 from contaminating the surface of the object 200 accommodated in the subsequently stacked tray 100.

[0137] The stopper 150 may be mainly formed along the periphery of the bottom surface 111 of the tray 100, and to a large extent, this can prevent the appearance of the tray 100 from changing due to the storage environment and transportation environment of the tray 100. For example, it is possible to prevent the warping or deformation of the tray 100.

[0138] In summarizing the detailed description, those skilled in the art will understand that many variations and modifications can be made to the embodiments without substantially departing from the disclosed principles. Therefore, the disclosed embodiments can be used only in a general and descriptive sense and not for the purpose of limitation. Each component specifically shown in the disclosed embodiments can be implemented by modification, and such modifications and differences related to the present application should be construed as being included within the scope of the disclosure defined in the appended claims.

Claims

1. A tray system, the tray system comprising: A tray, wherein the tray comprises: a tray main body; a loading portion formed in the tray main body and accommodating an object; a stopper formed in the loading portion and positioned on one side of the object accommodated in the loading portion; and a stepped portion having a step formed in a part of the stopper.

2. The pallet system according to claim 1, wherein The loading portion is formed at the center of the tray main body.

3. The pallet system according to claim 1, wherein, The loading portion is recessed downward from the tray main body to have the same shape as the object.

4. The pallet system according to claim 1, wherein, The loading portion further comprises: A bottom surface on which the object is placed, wherein the stopper and the stepped portion are formed on the bottom surface of the loading portion.

5. The pallet system according to claim 4, wherein, The stopper projects downward from the bottom surface.

6. The pallet system according to claim 1, wherein, The stopper has a rectangular shape along the periphery of the loading portion in a plan view.

7. The pallet system according to claim 1, wherein, The stopper includes a semi-circular cross-sectional shape.

8. The pallet system according to claim 4, wherein, The height from the bottom surface of the loading portion to the lower surface of the stopper is greater than the height from the bottom surface of the loading portion to the lower surface of the stepped portion.

9. The pallet system according to claim 4, wherein, The stepped portion projects downward from the bottom surface at the part of the stopper.

10. The pallet system according to claim 1, wherein, The stepped portion includes a semi-circular cross-sectional shape.

11. The tray system according to claim 1, the tray system further comprising: The object, wherein an upper protective film and a lower protective film are respectively positioned on the upper surface and the lower surface of the object.

12. The pallet system according to claim 11, wherein, The lower protective film further comprises: An opening exposing a part of the lower surface of the object.

13. The tray system according to claim 12, wherein, The object further comprises: An upper covering sheet and a lower covering sheet respectively positioned on the upper protective film and the lower protective film.

14. The tray system according to claim 13, wherein, The lower covering sheet is positioned on the lower protective film to close the opening of the lower protective film, and The lower covering sheet is in contact with the lower protective film.

15. The tray system according to claim 12, wherein, The stepped portion overlaps with the opening in a plan view.

16. The tray system according to claim 1, wherein, The tray main body further comprises: A guide groove formed at the edge of the loading portion to guide the removal of the object.

17. The tray system according to claim 1, wherein, The tray main body has a rectangular shape.

18. A tray stack system, the tray stack system comprising: A plurality of trays stacked on one another in sequence, wherein each of the plurality of trays comprises: a tray main body; a loading portion formed in the tray main body and accommodating an object; a stopper formed in the loading portion and positioned on one side of the object accommodated in the loading portion; and a stepped portion having a step formed in a part of the stopper.

19. The tray stack system according to claim 18, wherein, The plurality of trays include a first tray and a second tray, the first tray accommodating the object in the loading portion, the second tray being stacked on the first tray, The object of the first tray is in contact with the stopper of the second tray, and The object of the first tray is spaced apart from the stepped portion of the second tray.

20. The tray stack system according to claim 19, the tray stack system further comprising: The object, Wherein, the object further includes an upper protective film and a lower protective film respectively positioned on the upper surface and the lower surface of the object, and an upper cover sheet and a lower cover sheet respectively positioned on the upper protective film and the lower protective film, the lower protective film further includes an opening covered by the lower cover sheet, and the opening of the lower protective film of the object in the first tray is superimposed on the stepped portion of the second tray in the thickness direction of the plurality of trays.

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