JP4577206B2 - Tray container - Google Patents

Description

  The present invention relates to a tray-type container, and more specifically, it is suitable for transporting precision articles that are handled in a clean room in order to maintain cleanliness, such as optical lenses and electronic components. The present invention relates to a tray type container.

  Conventionally, conveyance of precision articles such as optical lenses and electronic parts handled in a clean room in order to maintain cleanliness is performed as follows using two film containers heat-sealed on three sides. First, after containing precision articles in the first film container, the inside air is deaerated, the open part is heat-sealed, and after the whole is housed in the second film container, the inside air is deaerated. And heat-sealing the opening. And after conveyance, a 2nd film container is opened before carrying in in a clean room etc. As a result, the article can be carried into a clean room or the like in a state where it is stored in a clean first film container to which no dust is attached.

  However, the above method has the following problems. That is, by performing the above-described precision article storage operation in an appropriate clean room, the inner and outer surfaces of the first and second film containers can be maintained clean and the storage operation can be completed. The work of deaeration and heat sealing of the open part needs to be performed twice, and the work cost is high.

In order to solve the above problems, a packaging clean film comprising a base material portion having a heat seal layer on the inner side and a protective film layer laminated on both the outer side and the inner side of the base material portion has been proposed. Yes. Such a packaging clean film can be maintained in a clean state on both the outer and inner sides of the base material by producing and winding it into a web in an appropriate clean room. And when making a bag, after preparing a pair of web-shaped packaging clean film, peeling off the protective film layer laminated on the inner surface of each, then superimposing each other and feeding them into the clean room, Both sides are heat-sealed along the web flow direction and heat-sealed along the width direction, and then cut in the width direction.
JP 7-330020 A

  By the way, in the case of a film container as described above, it is uneconomical because a protective film layer as a peeling film is required on both the outer side and the inner side of the base material part having the heat seal layer in order to clean the inner surface and the outer surface. In addition, a large number of winders are required for peeling and winding of the peeling film, and the facilities become large. Further, when producing a clean film for web-like packaging, a high degree of cleanliness is required in a clean room because the inner and outer surfaces of the film are exposed to the outside air or come into contact with the roll.

  The present invention has been made in view of the above circumstances, and its purpose is a tray type in which the amount of peeling film is small, and cleanliness can be maintained at a lower cost with relatively simple equipment. To provide a container.

  In order to solve the above-mentioned problems, the present invention comprises a container using a raw material sheet formed by laminating a laminated sheet in which a conductive layer and a protective layer are laminated by integral molding to a base material sheet. When the container was accommodated, the protective layer was peeled off as a release sheet, and the interface with the conductive layer to which no dust adhered was exposed on the inner surface of the container. In addition, by adding rigidity to the container, dust on the outer surface of the container can be easily removed by a simple operation such as an air shower. Then, by providing a structure part that fits the containers when they are stacked, the adhesion of dust to the outer surface of the container during the conveyance is reduced.

  That is, the gist of the present invention is a tray type which is composed of a substantially flat container body and a substantially flat lid and contains articles to be kept clean in a substantially fixed state, and is used by being stacked in multiple stages. The container body and the lid are each formed by drawing a raw material sheet, and a laminated sheet in which a conductive layer and a protective layer are laminated by integral molding as the raw material sheet. By using a raw material sheet that is bonded to a base material sheet so that the protective layer is exposed on the surface, each inner surface of the container body and the lid is peeled off as a release sheet when storing an article. The protective layer is disposed, and the peripheral portions of the container main body and the lid are coupled to the container main body and the lid, and a groove-shaped uneven fitting portion for fitting the stacked containers together. It consists in a tray type container, wherein is provided.

  According to the tray-type container of the present invention, the container body and the lid are configured using a raw material sheet formed by laminating a laminated sheet in which a conductive layer and a protective layer are laminated by integral molding to a base sheet, When storing the article, by peeling only the protective layer as a release sheet, the interface with the conductive layer to which dust is not attached can be exposed to the inner surface of the container, so an advanced clean room is not required, Articles can be accommodated in a more clean state. Moreover, since it is a rigid container, dust on the outer surface of the container can be easily removed by an air shower or the like, and the containers can be stacked with each other by a groove-like uneven fitting part provided at the peripheral part. It is possible to reduce the adhesion of dust to the outer surface of the container during the conveyance.

  An embodiment of a tray-type container according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a basic structure of a tray-type container according to the present invention, and FIG. 2 is a perspective view showing a method for using the tray-type container according to the present invention during transportation. FIG. 3 is a plan view showing the shape of the container main body and the lid of the tray-type container. FIG. 4 is a vertical cross-sectional view showing the cross-sectional shapes of the container main body, the lid, and the release sheet, and FIG. FIG. 6 is a cross-sectional view of a raw material sheet schematically showing the effect of peeling the release sheet during use and the method for manufacturing a tray-type container according to the present invention. In the following description, the tray type container is abbreviated as “container”.

  The container of the present invention is a tray-type rigid container, as indicated by reference numeral (1A) in FIG. 1, and includes a substantially flat container body (1) and a substantially flat lid (2). Such a container (1A) accommodates an article to be kept clean, for example, a precision part such as an optical lens or electronic part indicated by reference numeral (5) in FIG. 5 in a substantially fixed state, and FIG. As shown, it is stacked and used for transportation and storage. The container (1A) of the present invention has rigidity sufficient to maintain the shape of the container in order to safely store the article (5) and easily remove dust on the surface of the container, Each of the lids (2) is formed by drawing a raw material sheet (3) described later (see FIG. 6).

  As shown in FIGS. 1 and 3, the container body (1) has a planar shape, for example, a substantially square shape, and an article (5) (for example, a lens of a small digital camera) is formed on the inner surface (upper surface in FIG. 1). ) Are provided in a number of accommodating portions (15). When the article (5) is, for example, the lens described above, the housing part (15) is formed as a circular shallow hole that is recessed toward the bottom surface. In addition, at one corner of the container body (1), a tongue-shaped tab for gripping the container body (1) when peeling a release sheet (4) described later and opening the lid (2). A piece (12) is overhanging.

  As shown in FIGS. 1 and 3, the lid (2) has a planar shape, for example, a substantially square shape similar to that of the container body (1), and the article (5) is formed on the inner surface (lower surface in FIG. 1). A large number of accommodating portions (25) are provided for accommodating. The accommodating part (25) is formed as a circular shallow hole that bulges to the upper surface side when the article (5) is, for example, the lens described above. Further, at one corner of the lid (2), when a release sheet (4) described later is peeled off and when the lid (2) is opened, a tongue-shaped tab (22) for gripping the lid Is overhanging.

  That is, the container main body (1) and the lid (2) are formed in substantially the same shape except that the protruding directions of the storage portion (15) and the storage portion (25) are different, and the container main body (1 ) And the storage part (25) of the lid (2) are provided at positions corresponding to each other, and when the cover (2) is closed, the storage part (15) and the storage part (25) and the storage space for holding the article (5) is formed.

  For example, when a lens having a diameter of 6.5 mm is accommodated, the length of each side of the container main body (1) and the lid (2) is about 140 to 180 mm, depending on the type of the article (5). Each thickness (height when viewed from the side) of (1) and the lid (2) is about 6 to 10 mm. The accommodating portion (15) and the accommodating portion (25) are designed to have a diameter of about 8 to 10 mm, and are provided at about 80 to 120 locations with respect to the container body (1) and the lid (2). Moreover, the depth of the accommodating part (15) of the container body (1) is about 2 to 3 mm, and the depth (internal height) of the accommodating part (25) of the lid (2) is about 0.8 to 1.2 mm. It is.

  In the container (1A) of the present invention, as shown in FIGS. 1 and 3, each peripheral edge of the container body (1) and the lid (2) is provided to improve handling and reduce adhesion of dust during transportation. The container is connected to the container body (1) and the lid (2), and the grooved concave / convex fitting part (11) and the concave / convex fitting for fitting the stacked containers (1A) to each other (see FIG. 2). A part (21) is provided. As shown in FIG. 1, the concave / convex fitting portion (11) and the concave / convex fitting portion (21) protrude from the upper surface side of the container body (1) and the lid (2), respectively, and the lower surface side is formed as a groove. Structure part.

  The concave-convex fitting portion (11) and the concave-convex fitting portion (21) are each formed with a groove on the lower surface side as described above, so that when the lid (2) is closed, the concave-convex fitting of the container body (1) is performed. The joint (11) is fitted in a state where the concave and convex fitting portion (21) of the lid (2) is covered, and when the containers (1A) are overlapped as shown in FIG. 2, the lower container (1A) The concave / convex fitting portion (21) of the lid (2) is fitted to the concave / convex fitting portion (11) of the container body (1) of the upper container (1A). Therefore, each of the concavo-convex fitting portions (11) and the concavo-convex fitting portion (21) can close each container (1A) in an airtight manner, and a large number of containers (1A) can be stacked and integrated. I can do it.

  In the container (1A) of the present invention, the article (5) is accommodated inside the container, that is, in each accommodating space composed of the accommodating portions (15) and (25) without dust adhering thereto. As shown, a release sheet (4) is provided on each inner surface of the container body (1) and the lid (2). As will be described later, the release sheet (4) is molded integrally with the container body (1) and the lid (2) from the raw material sheet (3), and after the molding, the protective layer (34) ( As shown in FIG. 6, it is located on each inner surface side of the container body (1) and the lid (2). In other words, the protective layer (34) is disposed as the release sheet (4) on each inner surface of the container main body (1) and the lid (2) before use.

  Next, the manufacturing method of the container (1A) of the present invention and the function of the release sheet (4) will be described. As described above, the container (1A) of the present invention is formed by drawing a raw material sheet (3) as shown in FIG. As a constituent material of the container (1A), that is, a raw material sheet (3) constituting the container body (1) and the lid (2), as shown in FIG. 6, a conductive layer (33) and a protective layer (34) A raw material sheet is used in which a laminated sheet (36) is laminated on the base sheet (3a) so that the protective layer (34) is exposed on the surface.

  As the base material sheet (3a), a sheet of polystyrene, polypropylene, polyethylene terephthalate, polyphenylene ether or the like, preferably a polystyrene sheet is preferably used in order to give the container body (1) and the lid (2) the required rigidity. Is done. And in the case of the above-mentioned lens, the thickness of a base material sheet (3a) is about 0.3-2 mm, Preferably it sets to 0.4-0.6 mm.

  The laminated sheet (36) is produced by laminating at least two kinds of resins by a method to be described later. The conductive layer (33) of the laminated sheet (36) is provided to reduce the adhesion of dust. As resin which comprises a conductive layer (33), what mix | blended the antistatic agent with resin similar to said base material sheet (3a) is used. The antistatic agent is a polymer type antistatic agent used by blending with the target resin and alloying. Examples of the antistatic agent include polyvinyl alcohol, polyether, polyether polyamide, polyester, and polyester polyamide. Etc. The blending amount of the antistatic agent is usually 5 to 25% by weight, preferably 10 to 20% by weight as a ratio per resin. The thickness of the conductive layer (33) is not particularly limited as long as it can exhibit an antistatic function, but is usually set to 20 to 50 μm, preferably 20 to 30 μm from the viewpoint of performance and cost. Is done.

  On the other hand, as described above, the protective layer (34) of the laminated sheet (36) is a resin layer that is peeled off as the release sheet (4) during use, and is peeled off as the resin constituting the protective layer (34). From the viewpoint of easy handling, various flexible polyolefin resins, preferably polyethylene, can be used. And the thickness of a protective layer (34) is about 60-100 micrometers normally, Preferably it sets to 70-85 micrometers.

  The laminated sheet (36) shown in FIG. 6 (a) is usually formed by co-extrusion of the resin constituting the conductive layer (33) and the above-mentioned fat constituting the protective layer (34). Manufactured by. The co-extrusion molding is a multilayer extrusion molding using a multilayer extrusion die, a so-called T-die method. As such a molding method, a single block die is used to combine materials in front of a die, a multi-layer extrusion die, Examples include a die-in-adhesion method in which materials are combined inside a die using a manifold die, and a die-outside adhesion method using a multi-slot die.

  Moreover, the multilayer sheet (36) having the multilayer structure can be manufactured by processing a tube-shaped multilayer sheet obtained by a co-extrusion inflation method. That is, a plurality of types of raw material resins are co-extruded from an annular die so as not to be substantially stretched, passed through an air ring and cooled with cooling air, and then wound on an an inner plate through a cylindrical body of a laminated sheet. By supplying to a take-up roll, it can wind up in the state folded flat, Furthermore, it can produce in a planar sheet | seat by cut | disconnecting the lamination sheet drawn | fed out from the take-up roll at a folding part.

  As described above, the raw material sheet (3) is obtained by replacing the laminated sheet (36) in which the conductive layer (33) and the protective layer (34) are laminated by an integral molding method such as a co-extrusion molding method or an inflation method. It is manufactured by pasting together (3a). In laminating the laminated sheet (36) to the base sheet (3a), the laminated sheet (36) is laminated by dry lamination or thermal lamination so that the protective layer (34) is exposed on the surface. That is, the laminated sheet (36) is bonded so that the conductive layer (33) is disposed on one surface side of the base sheet (3a).

  In the laminated sheet (36), in order to increase the adhesion between the base sheet (3a) and the laminated sheet (36), the surface of the conductive layer (33) opposite to the protective layer (34) is further made of polystyrene. An adhesive layer may be provided. That is, the laminated sheet (36) may have a three-layer structure. In that case, the thickness of the adhesive layer is set to about 20 to 50 μm, preferably 20 to 35 μm.

  After the raw material sheet (3) is manufactured as described above, the raw material sheet is inserted into a molding machine, and as shown in FIG. 6 (b), the laminated sheet (36) has the container body (1) and the lid. The container body (1) and the lid (2) are formed by drawing so as to be inside each of (2). As a result, in the obtained container (1A), on the inner surfaces of the container body (1) and the lid (2), a protective layer (as a release sheet (4) peeled off when the article (5) is stored) 34) is arranged.

  The method of using the container (1A) of the present invention is as follows. That is, when the above-mentioned lens is packaged as a clean article (5) in a clean room, for example, the container (1A), in other words, the container body (1) and the lid (2) are carried into the clean room. At that time, since the container (1A) of the present invention has rigidity, dust attached to the surface can be easily removed to some extent by passing through an air shower.

  Next, when the article (5) is accommodated in the container (1A), as shown in FIGS. 4 and 6 (c), the container body (1) and the lid (2) are both laminated on the inner surface. The protective layer (34) of the sheet (36), that is, the release sheet (4) is peeled off. In that case, about the container main body (1), the picking piece (12) of the container main body (1) and the picking piece (42) of the release sheet (4) are held, and the release sheet (4) is peeled off. Similarly, for the lid (2), the gripping piece (22) of the lid (2) and the gripping piece (42) of the release sheet (4) are grasped and the release sheet (4) is peeled off (FIG. 1). reference). Thereby, both the container main body (1) and the lid | cover (2) can make the inner surface into the clean surface which is not contaminated at all.

  That is, in the container (1A) of the present invention, a raw material sheet formed by laminating a laminated sheet (36) in which a conductive layer (33) and a protective layer (34) are laminated by integral molding to a base sheet (3a). (3), when the article (5) is accommodated, the protective layer (34) is peeled off as the release sheet (4), and the conductive layer (33) to which dust is not attached. The interface can be exposed on the inner surface of the container. Accordingly, the article (5) is put into the housing part (15) of the container body (1) from which the release sheet (4) has been peeled off, and the lid (2) from which the release sheet (4) has been peeled is closed to clean the container body (1). Articles can be stored in a very high storage space. In addition, when the lid | cover (2) is assembled | attached to the container main body (1), the inside of a container can be sealed airtight by fitting of an uneven | corrugated fitting part (11) and (21).

  After the article (5) is accommodated in the container (1A), as shown in FIG. 2, an appropriate number of containers (1A) are transported in one lot. At that time, in the clean room, the concave / convex fitting portion (21) of the lid (2) of the lower container (1A) is placed on the back surface of the concave / convex fitting portion (11) of the container body (1) of the upper container (1A). By fitting and stacking the containers (1A) in multiple stages, the outer surface of each container (1A) other than the container (1A) in the lowermost stage can be maintained in a relatively clean state. Accordingly, when the container (1A) is carried into the assembly rain (clean room) or the like using the lens after the conveyance, the container (1A) can be carried in a clean state by simply washing the outer periphery of the lot.

  As described above, according to the container (1A) of the present invention, the laminated sheet (36) in which the conductive layer (33) and the protective layer (34) are laminated by integral molding without substantially touching the outside air is used as the base material. The container body (1) and the lid (2) are configured using the raw material sheet (3) bonded to the sheet (3a), and when the article (5) is accommodated, as a release sheet (4) By peeling only the protective layer (34), the surface of the conductive layer (33) to which no dust is attached can be exposed to the inner surface of the container, and a completely clean storage space (accommodating portions (15), (25 ) Can be configured, so that an advanced clean room is not required, and the article (5) can be accommodated in a more clean state. Since the container (1A) of the present invention is a rigid container, dust on the outer surface can be easily removed by an air shower or the like. Moreover, since the containers can be stacked by the concave and convex fitting portions (11) and (21) provided on the peripheral portions of the container main body (1) and the lid (2), the outer surface of the container (1A) in the middle of conveyance It is possible to reduce the adhesion of dust to the surface.

It is a perspective view which shows the basic structure of the tray type container which concerns on this invention. It is a perspective view which shows the usage method at the time of conveyance of the tray type container which concerns on this invention. It is a top view which shows the shape of the container main body and lid | cover of a tray type container. It is a longitudinal cross-sectional view which shows the cross-sectional shape of a container main body, a lid | cover, and a peeling sheet. It is a longitudinal cross-sectional view which shows the accommodation space of the articles | goods comprised with a container main body and a lid | cover. It is sectional drawing of the raw material sheet which shows typically the manufacturing method of the tray type container which concerns on this invention, and the effect by peeling of the peeling sheet at the time of use.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A: Tray type container 1: Container body 11: Concave fitting part 12: Picking piece 15: Storage part 2: Cover 21: Concave fitting part 22: Picking piece 25: Storage part 3: Raw material sheet 3a: Base material sheet 33 : Conductive layer 34: Protective layer (release sheet)
36: Laminated sheet 4: Release sheet 42: Pick piece 5: Article (lens)

Claims (2)

  It is a tray-type rigid container comprising a substantially flat container body and a substantially flat lid and containing articles to be kept clean in a substantially fixed state, and being used by being stacked in multiple stages, Each of the container body and the lid is formed by drawing a raw material sheet, and the protective layer exposes the surface of the laminated sheet in which the conductive layer and the protective layer are laminated by integral molding as the raw material sheet. In this way, by using the raw material sheet bonded to the base material sheet, the protective layer that is peeled off as a release sheet when the article is accommodated is disposed on each inner surface of the container body and the lid. In addition, each peripheral portion of the container main body and the lid is provided with a groove-shaped uneven fitting portion for coupling the container main body and the lid and fitting the stacked containers together. You Tray-type container.   The tray-type container according to claim 1, wherein the base sheet is a sheet made of polystyrene and having a thickness of 0.2 to 2 mm.

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