JP2017052545A - Packaging structure of iron-based member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging structure of an iron-based member which hardly causes breakage of a packaging film.SOLUTION: A packaging structure includes a tray-like container, a lid covering the upper portion of the tray-like container, and a bag-like packaging film, where the inside of the packaging film is kept at a lower pressure state than an atomospheric pressure. The tray-like container includes a container peripheral edge portion formed by bending the peripheral edge portion thereof toward the side of the lid, the lid includes a lid peripheral edge portion formed by bending the peripheral edge portion thereof toward the side of the tray-like container, the end face of the container peripheral edge portion and the end face of the lid peripheral edge portion face each other, and the tray-like container and the lid are composed of a non-foamable resin, and the packaging film is composed of a resin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging structure for iron-based members.

  Cast materials containing iron, and iron-based members such as compacts and sintered bodies are used in various fields. For example, a reactor mounted on an electric vehicle such as a hybrid vehicle includes a magnetic core containing iron or an iron alloy.

  When transporting mass-produced iron-based members to parts assembly sites that use iron-based members, in addition to preventing damage to iron-based members, iron-based members do not rust or adhere to the surface of iron-based members. Thus, iron-based members are packed. For example, Patent Document 1 describes an iron-based member packing structure in which a plurality of rare earth magnets (iron-based members) are packed.

  In an embodiment with reference to FIG. 3 of Patent Document 1, a packing member (tray-like container) having a plurality of fitting recesses into which a plurality of iron-based members are individually fitted is sealed in the packing film, The packaging structure of the iron-type member which maintained the inside of this in the low pressure state lower than atmospheric pressure is disclosed. In the embodiment, among the packing members (tray-like containers) stacked in multiple stages, the iron-based member is not fitted into the fitting recess of the packing member arranged at the uppermost stage, so that the uppermost packaging member is placed. Is used for the lid.

JP 2007-197070 A

  In the configuration of Patent Document 1, a resin-molded tray-like container is used, and the tray-like container is thick and hard. Therefore, when the inside of the packing film is evacuated, the packing film may be damaged if the corners of the tray-like container or the corners of the lid come into contact with the inner peripheral surface of the packing film. In this case, the iron-based member may be damaged, foreign matter may adhere to the iron-based member, or the iron-based member may be rusted if the surface is an iron-based member that has not been rust-proofed.

  Further, in the configuration of Patent Document 1, the clearance between the tray-shaped container and the iron-based member is large, and the iron-based member is easily rattled in the tray-shaped container. If the iron-based member rattles in the tray-like container, the tray-like container is hard, and the iron-based member may be damaged.

  Furthermore, in the configuration of Patent Document 1, since there are almost no gaps between the tray-like containers stacked in multiple stages, it is difficult to deaerate the inside of the tray-like container even if the inside of the packing film is evacuated. Therefore, in the case of an iron-based member that has not been rust-proofed, the iron-based member may rust.

  This invention is made | formed in view of said situation, and the one of the objective is to provide the packing structure of the iron-type member which is hard to produce a damage to a packing film.

  An iron-based member packing structure according to an aspect of the present invention includes a tray-like container having a plurality of insertion recesses into which a plurality of iron-based members are individually fitted, a lid that covers an upper portion of the tray-like container, and the plurality of And a bag-like packing film that seals the assembly covered with the lid on the tray-like container in which the iron-based member is fitted, and the inside of the packing film is in a low-pressure state lower than atmospheric pressure. It is the packing structure of the iron-type member maintained. The tray-like container includes a container peripheral part formed by bending the peripheral part toward the side with the lid, and the lid is bent with the peripheral part toward the side with the tray-like container. The lid peripheral part formed by is provided. The end face of the container peripheral part and the end face of the cover peripheral part are opposed to each other, the tray-like container and the cover are made of non-foaming resin, and the packing film is made of resin.

  According to the packing structure of the iron-based member, the packing film is hardly damaged.

It is a longitudinal cross-sectional view of the packing structure of the iron-type member which concerns on Embodiment 1. FIG. It is a longitudinal cross-sectional view of the packing structure of the iron-type member which concerns on Embodiment 2. FIG. It is a longitudinal cross-sectional view of the packing structure of the iron-type member which concerns on Embodiment 3.

-Description of embodiment of this invention First, the embodiment of this invention is listed and demonstrated.

<1> The packaging structure of iron-based members according to the embodiment includes a tray-shaped container having a plurality of recessed portions into which a plurality of iron-based members are individually fitted, a lid that covers an upper portion of the tray-shaped container, and the plurality of And a bag-like packing film that seals the assembly covered with the lid on the tray-like container in which the iron-based member is fitted, and the inside of the packing film is in a low-pressure state lower than atmospheric pressure. It is the packing structure of the iron-type member maintained. The tray-like container includes a container peripheral part formed by bending the peripheral part toward the side with the lid, and the lid is bent with the peripheral part toward the side with the tray-like container. The lid peripheral part formed by is provided. The end face of the container peripheral part and the end face of the cover peripheral part are opposed to each other, the tray-like container and the cover are made of non-foaming resin, and the packing film is made of resin.

  In the above configuration, the peripheral edge of the tray-like container is bent and the peripheral edge of the lid is bent, and the end surface of the peripheral edge of the tray-like container (tray peripheral edge) and the peripheral edge of the lid (lid peripheral edge) Since the end surfaces are opposed to each other, the end portions of the peripheral portions (portions in the vicinity of the end surfaces) that are likely to be sharp corners are difficult to touch the inner peripheral surface of the packaging film. Therefore, the possibility that the packing film is torn by the peripheral portion is low, the airtightness of the packing film is easily maintained, and the state in which the tray-like container and the lid are pressed by the packing film is easily maintained.

<2> As an aspect of the iron-based member packaging structure according to the embodiment, the tray-like container is bent toward the side where the lid is located after the peripheral edge portion is bent toward the side away from the lid. It can be mentioned that the peripheral edge of the container is formed at the part that bends to the lid side.

  In other words, the above-described configuration is a configuration in which the peripheral portion of the tray-like container is formed in a U-shaped section (or a V-shaped section), and the U-shaped section in the tray-like container is like a leaf spring. It becomes easy to bend to the center side. Therefore, with this configuration, when the degree of vacuum in the packing film is increased and the packing film is brought into close contact with the tray-like container, the U-shaped section is bent, so that the edge of the container peripheral edge is the packing film. Contact with the inner peripheral surface can be effectively suppressed. Here, the space formed inside the U-shaped section can be used for the arrangement of the desiccant described later.

<3> As one form of the iron-based member packing structure according to the embodiment, the lid is bent toward the side away from the tray-shaped container and then toward the side where the tray-shaped container is located. It can be mentioned that the peripheral edge of the lid is formed at the portion bent toward the tray-like container.

  In other words, the above-described configuration is a configuration in which the peripheral side portion of the lid is formed in a U-shaped cross section (or V-shaped cross section), and is similar to the case where the peripheral side portion of the tray-like container is formed in a U-shaped cross section. The effect of can be obtained. That is, with this configuration, when the degree of vacuum in the packaging film is increased and the packaging film is brought into close contact with the lid, the U-shaped section of the cross section bends, so that the end of the lid peripheral edge is within the packaging film. Contact with the peripheral surface can be effectively suppressed.

<4> As one form of the packing structure of the iron-type member which concerns on embodiment, the said non-foamable resin can mention the form which is a polyethylene terephthalate resin.

  Polyethylene terephthalate resin is preferred because it is inexpensive and easily available. Polyethylene terephthalate resin is strong and has advantages such as excellent gas barrier properties, water resistance, oil resistance, and chemical resistance. Furthermore, since the polyethylene terephthalate resin is excellent in transparency, an effect that the inside of the tray-like container (lid) can be visually confirmed can be obtained by forming the tray-like container (lid) with the polyethylene terephthalate resin.

<5> As an aspect of the iron-based member packing structure according to the embodiment, the packing film is transparent, and at least one of the tray-like container and the lid is also transparent.

  According to the said structure, the iron-type member accommodated in the tray-shaped container can be confirmed visually. As a result, it is possible to reduce the possibility that the type and quantity of the iron-based member are mistakenly packed. Here, by making the lid (tray-like container) transparent and coloring the tray-like container (lid) according to the type of the iron-based member, the type of the iron-based member in the packing structure can be distinguished even from a distance. .

<6> As one form of the packing structure of the iron-based member which concerns on embodiment, the form provided with a desiccant in the said packing film can be mentioned.

  According to the said structure, since the water | moisture content which remains in a packing film can be removed with a desiccant, the rusting of the iron-type member arrange | positioned in a packing film can be suppressed.

<7> As one form of the packing structure of the iron-type member which concerns on embodiment, the form whose moisture content of the said tray-shaped container and the said lid is less than 1% can be mentioned.

  According to the above configuration, after sealing the tray-like container and the lid in the packaging film, it is possible to suppress the release of moisture from the tray-like container and the lid into the packaging film, and the iron system disposed in the packaging film. Rust generation of the member can be suppressed.

<8> As one form of the packing structure of the iron-based member which concerns on embodiment, the form by which the inert gas is enclosed in the said packing film can be mentioned.

  According to the said structure, after evacuating the inside of a packing film, by sealing an appropriate amount of inert gas, it can suppress effectively that the inner peripheral surface of a packing film contacts the edge part of the peripheral part of a container. It is possible to prevent damage to the packaging film.

<9> As one form of the iron-based member packing structure according to the embodiment, the tray-like container and the lid are pressed toward each other by the packing film and face the fitting recess on the inner side surface of the lid. The form which at least one part of the part to contact contacts the said iron-type member, and the said iron-type member is pressed on at least one part of the inner bottom face of the said insertion recessed part can be mentioned.

  In the packing structure for iron-based members according to the embodiment, the inside of the packing film is in a reduced pressure state. At this time, when the degree of vacuum in the packing film is increased, the packing film is in close contact with the outer peripheral surface of the tray-like container and the lid, and presses the tray-like container and the lid in a direction approaching each other. If the iron-based member is sandwiched between the lid and the tray-shaped container as in the above configuration, the position of the iron-based member in the tray-shaped container can be fixed, and the iron-based member in the tray-shaped container can be fixed. The backlash can be suppressed. As a result, damage to the iron-based member during transportation and storage can be suppressed.

<10> As an aspect of the iron-based member packing structure according to the embodiment, a plurality of tray-like containers having the same shape are stacked in multiple stages, and the lid is placed on the uppermost tray-like container. Can be mentioned.

  According to the said structure, many iron-type members can be conveyed and stored. Therefore, the productivity of products using iron-based members can be improved.

<11> As one form of the packing structure of the iron-type member which concerns on embodiment, the form whose said tray-shaped container and the said lid are the same shapes can be mentioned.

  According to the said structure, a tray-shaped container and a lid can be produced with one metal mold | die, and the productivity of the packing structure of an iron-type member can be improved.

<12> As an aspect of the iron-based member packing structure according to the embodiment, the iron-based member may be a dust core.

  Powder magnetic cores used for magnetic parts such as reactors are susceptible to rust because they do not take anti-rust measures such as plating. Therefore, it is preferable to pack with the packing structure of the iron-based member which is difficult to break the packing film and has a high rust prevention effect. If the dust core is transported and stored in the iron-based member packing structure of the embodiment, the quality of the magnetic component using the dust core can be stabilized. Further, the transportation and storage described above may be performed by putting what is packed in the packing structure of the embodiment into a container such as a plastic container box.

Details of Embodiments of the Present Invention Details of embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

<Embodiment 1>
The packaging structure 1 for iron-based members shown in the longitudinal cross-sectional view of FIG. 1 is a packaging form that protects the iron-based members 9 when the plurality of iron-based members 9 are transported and stored. A tray-like container 2 to be placed, a lid 3 that covers the upper side of the tray-like container 2, and a bag-like packing film 4 that seals these inside are provided. One of the main features of this iron-based member packaging structure 1 is the shape of the peripheral edges of the tray-like container 2 and the lid 3. Hereinafter, each structure of the packing structure 1 is demonstrated in detail.

≪Iron-based materials≫
The iron-based member 9 packed in the iron-based member packing structure 1 is a member containing iron (Fe) as at least a part of the constituent elements. For example, powder magnetic cores (pressures) used in magnetic parts such as motors, transformers, reactors, choke coils, etc. used for in-vehicle parts mounted on vehicles such as hybrid cars and electric cars, and power supply circuit parts for various electric devices. Powder molded body).

  The dust core is obtained by press-molding soft magnetic powder, which is an aggregate of coated particles in which an insulating coating is provided on the outer periphery of soft magnetic metal particles such as iron or an iron-based alloy, together with a molding aid. Examples of the molding aid include an internal lubricant that is mixed with soft magnetic powder and suppresses damage to the insulation coating, and an external lubricant that is applied to the inner peripheral surface of a mold for pressure molding.

  The iron-based member 9 is not limited to the dust core. For example, it may be a sintered body, a cast body, a processed body obtained by subjecting the cast body to plastic working, or the like.

≪Tray container≫
The tray-like container 2 has a plurality of fitting recesses 20 into which a plurality of iron-based members 9 are fitted individually. The number and the arrangement of the fitting recesses 20 are not particularly limited. Moreover, the shape of the insertion recessed part 20 can be suitably selected according to the shape of the iron-type member 9, and is not specifically limited. Although the bottom surface of the insertion recess 20 of this example is flat, for example, the center portion of the bottom surface may be raised upward. Further, if the iron-based member 9 has a protruding portion, the center portion of the fitting recess 20 may protrude downward so that the protruding portion can be accommodated.

  A portion on the peripheral side of the tray-like container 2 (portion formed in a U-shaped cross section) is bent toward the side away from the lid 3 and then bent toward the side where the lid 3 is located. This U-shaped section is like a leaf spring, and of the U-shaped section, the outer end side portion (container peripheral portion 25) that bends to the side with the lid 3 is on the center side of the page. It is easy to bend. Here, the peripheral portion of the tray-like container 2 is a portion including the outer peripheral contour line when the tray-like container 2 is viewed from above, and accordingly, the left-side container peripheral portion 25 and the right-side container peripheral side 25 shown in FIG. Are connected.

  The thickness of the tray-like container 2 can be appropriately selected in consideration of the mass and number of the iron-based members 9 placed on the tray-like container 2, the material constituting the tray-like container 2, and the like. For example, the thickness of the tray-like container 2 is 0.3 mm or more and 1.5 mm or less, or 0.5 mm or more and 1.2 mm or less. The thickness of the tray-like container 2 of this example is 0.8 mm. In addition, regarding the shape of the tray-like container 2, the corner of the tray-like container 2, for example, the corner on the outer peripheral side of the fitting recess 20 is preferably rounded.

  The tray-like container 2 is made of resin. Examples of the resin include polyethylene resin, polypropylene resin, polyvinyl chloride resin, polystyrene resin, acrylonitrile resin (AS resin), acrylonitrile-butadiene-styrene copolymer resin (ABS resin), polyethylene terephthalate resin (PET resin), and polyamide resin. Thermoplastic resins such as polybutylene terephthalate resin and thermosetting resins such as phenol resin, polyurethane resin, epoxy resin, and unsaturated polyester resin can be used. In particular, a PET resin that is inexpensive and easily available, and is tough and excellent in gas barrier properties, oil resistance, and chemical resistance is preferable as the resin constituting the tray-like container 2. In this example, a transparent PET resin is used as the tray-like container. 2 is produced. Since PET resin is excellent in transparency, there is also an advantage that the iron-based member 9 housed in the tray-like container 2 can be visually recognized from the outside of the tray-like container 2.

  Here, considering the rust prevention of the iron-based member 9, it is preferable that the tray-like container 2 is made of a non-foamable resin rather than a foamed resin that easily contains air or moisture. For example, it is preferable that the moisture content (mass basis) of the tray-like container 2 is less than 1%. In view of satisfying the requirement that the moisture content is less than 1%, the tray-like container 2 is preferably made of polyethylene terephthalate resin. On the other hand, for example, a foamed resin such as polystyrene foam has a problem that the moisture content is high and bulky. In addition, the foamed resin is liable to be contaminated with foreign substances in the air bubbles, and is very soft, so that it is difficult to remove the dirt when it becomes dirty.

≪Lid≫
The lid 3 of this example includes a fitting recess 30 into which an upper portion of the iron-based member 9 is fitted. The lid 3 of the present example has the same shape as the tray-like container 2 described above. Therefore, the fitting recess 30 provided in the lid 3 is located at a position corresponding to the fitting recess 20 of the tray-like container 2. The same number is provided. Here, the lid 3 may have a shape different from that of the tray-like container 2 as shown in Embodiments 2 and 3 described later.

  A portion on the peripheral side of the lid 3 (portion formed in a U-shaped cross section) becomes a leaf spring that bends toward the side away from the tray-like container 2 and then curves toward the side with the tray-like container 2. Yes. Of the U-shaped section, the outer end portion (the lid peripheral edge portion 35) that bends to the side where the tray-like container 2 is located is easily bent toward the center of the paper surface. The left lid peripheral edge 35 and the right lid peripheral edge 35 shown in FIG. 1 are connected.

  The end surface of the lid peripheral portion 35 in the lid 3 and the end surface of the container peripheral portion 25 of the tray-like container 2 described above are in a state of facing each other. More specifically, a gap is formed between the end surface of the lid peripheral portion 35 and the end surface of the container peripheral portion 25 in a state where the iron-based member 9 is accommodated in the tray-shaped container 2 and the cover 3 is covered. Due to the gap, air is easily discharged from the space surrounded by the tray-like container 2 and the lid 3 when the inside of the packing film 4 is evacuated as will be described later. In addition, because of the gap, the end surface of the container peripheral portion 25 and the end surface of the cover peripheral portion 35 are unlikely to interfere with each other, and the U-shaped section including the tray peripheral portion 25 (the cover peripheral portion 35) Easy to deform.

  The lid 3 is made of resin in the same manner as the tray-like container 2. Any resin that can be used for the tray-like container 2 may be used as the resin constituting the lid 3. The resin constituting the lid 3 is preferably a PET resin for the same reason as that of the tray-like container 2. In this example, the lid 3 is composed of a transparent PET resin. If it is PET resin, the moisture content of the lid 3 can be less than 1%, and rusting of the iron-based member 9 can be suppressed.

  Here, it is preferable that the total D of the depth of the fitting recess 20 of the tray-like container 2 and the depth of the fitting recess 30 of the lid 3 is smaller than the height T of the iron-based member 9. In this example, the total depth D of the fitting recesses 20 and 30 is about 5 mm smaller than the height T (30 mm) of the iron-based member 9. As a result, a gap is formed between the tray-like container 2 and the lid 3 at a position between two adjacent iron-based members 9. Due to this gap, when the inside of the packaging film 4 is evacuated as will be described later, air is easily discharged from the space surrounded by the tray-like container 2 and the lid 3. The difference between the total depth D and the height T is preferably 1 mm or more and 10 mm or less, and more preferably 3 mm or more and 7 mm or less. In addition, the height of the iron-based member 9 described above is the length in the vertical direction of the drawing, and is not necessarily the same as the length in the height direction when the iron-based member 9 is used.

[Tray-like container and lid manufacturing method]
The tray-like container 2 and the lid 3 can be produced, for example, as follows. First, a thin plate (sheet) of PET resin is prepared. Next, this sheet is heated, and a sheet of PET resin is press-molded with a mold having irregularities corresponding to the shape of the tray-like container 2 (lid 3). At the time of press molding, at least one of the sheet and the mold is heated in order to facilitate molding. After press forming, unnecessary portions are trimmed to obtain a tray-like container 2 (lid 3). Trimming is performed so that burrs protruding outward from the container peripheral edge 25 (lid peripheral edge 35) of the tray-like container 2 (lid 3) remain as little as possible. It is preferable that the burrs are completely removed. Here, when the tray-like container 2 and the lid 3 are produced by resin molding as in Patent Document 1, the tray-like container 2 and the lid 3 are thick and heavy, and the transparency is lowered.

≪Packing film≫
The packing film 4 is a bag-like member that seals an assembly in which a lid 3 is covered on a tray-like container 2 in which a plurality of iron-based members 9 are fitted. The shape and size of the packing film 4 can be appropriately selected according to the shape and size of the braid sealed inside.

  The packaging film 4 can be formed, for example, by superimposing two films having the same shape and thermally fusing the edges of the two films. You may form the opening part for putting a braid into the packing film 4 by not heat-sealing a part of edge. In that case, a braid can be sealed in the packing film 4 by putting the braid into the packing film 4 from the opening and heat-sealing the opening. The assembly may be sealed in the packaging film 4 by sandwiching the assembly between two films and thermally fusing the edges of both films over the entire circumference.

  The packaging film 4 is preferably made of a resin that is tough and hardly torn and has a certain degree of flexibility. Examples of such resins include polyethylene resins and polyolefin resins such as polypropylene resins. These resins are preferable in that they are excellent in gas barrier properties and excellent in water resistance, oil resistance, and chemical resistance. Moreover, since these resin is excellent in transparency, it is also preferable at the point which can confirm the iron-type member 9 visually from the exterior of the packing film 4. FIG. If the packaging film 4 is composed of an aluminum laminate film, the iron-based member 9 in the packaging film 4 cannot be visually confirmed.

  The inside of the packing film 4 is brought into a low pressure state lower than the atmospheric pressure by evacuation. For example, the pressure of the internal atmosphere of the packing film 4 is preferably 0.02 MPa or less, more preferably 0.01 MPa or less, and most preferably 0.005 MPa or less. In this example, since there is a gap between the tray-like container 2 and the lid 3 at the positions of the peripheral portions 25 and 35 and between the adjacent iron-based members 9, the tray-like container 2 and the lid 3 are surrounded. It is easy to deaerate from the space where it is. Therefore, the pressure can be easily achieved.

  By maintaining the inside of the packaging film 4 in a low pressure state, the packaging film 4 is brought into close contact with the outer peripheral surfaces of the tray-like container 2 and the lid 3, and the tray-like container 2 and the lid 3 are brought closer to each other by tightening with the packaging film 4. Can be pressed. At this time, in this example, since the total depth D of the fitting recesses 20 and 30 is smaller than the height T of the iron-based member 9, the iron-based member 9 is sandwiched between the tray-like container 2 and the lid 3. It becomes a state. Since the iron-based member 9 is sandwiched between the tray-shaped container 2 and the lid 3, the position of the iron-based member 9 in the tray-shaped container 2 can be fixed, and rattling of the iron-based member 9 in the tray-shaped container 2 is prevented. Can be suppressed. As a result, damage to the iron-based member 9 during transportation or storage can be suppressed.

  An appropriate amount of inert gas may be sealed after the packaging film 4 is evacuated. It can suppress effectively that the inner peripheral surface of the packing film 4 contacts the edge part of the peripheral parts 25 and 35 of the tray-shaped container 2 and the lid | cover 3, and can make it difficult to produce the damage of the packing film 4. FIG. Examples of the inert gas include nitrogen gas and argon gas. Even when the inert gas is sealed, the inside of the packaging film 4 is in a low pressure state. For example, the pressure of the internal atmosphere of the packing film 4 is preferably 0.08 MPa or less, and more preferably 0.05 MPa or less.

≪Others≫
In order to suppress rusting of the iron-based member 9 in the packing film 4, a desiccant 5 may be disposed inside the packing film 4. In this example, since the portion having a U-shaped cross section on the peripheral side of the tray-like container 2 is a depression, the desiccant 5 is disposed in the depression. Of course, the position where the desiccant 5 is disposed is not particularly limited. For example, the desiccant 5 may be disposed between the tray-like container 2 and the packaging film 4 or between the lid 3 and the packaging film 4.

  As the desiccant 5, for example, silica gel can be used. In addition to the desiccant 5, an oxygen scavenger can also be used.

≪Effect≫
The tray-like container 2 and the lid 3 formed by resin molding or the like are easily formed with burrs at the end portions (near end surfaces) of the peripheral portions 25 and 35. If the burr contacts the inner peripheral surface of the packaging film 4, the packaging film 4 is likely to be broken, and the iron-based member 9 cannot be partitioned from the external atmosphere. However, in this example, the end surfaces of the peripheral edge portions 25 and 35 of the tray-like container 2 and the lid 3 are opposed to each other, and the vicinity of the end surfaces of the peripheral edge portions 25 and 35 is difficult to directly contact the packing film 4. This makes it difficult for the packing film 4 to be torn. Moreover, in this example, the peripheral edge portions 25 and 35 are formed in a leaf spring shape, and a gap is formed between the end faces of the peripheral edge portions 25 and 35, so that the packing film 4 is placed on the tray-like container 2 and the lid 3. When closely attached, both peripheral edge portions 25 and 35 bend inward. As a result, the vicinity of the end surfaces of the peripheral edge portions 25 and 35 is difficult to directly contact the packaging film 4 and the packaging film 4 is not easily torn. If it is possible to prevent the packaging film 4 from being broken, problems associated with the tearing of the packaging film 4 can be avoided. For example, it is possible to effectively suppress rusting on the iron-based member 9 during transportation / storage of the iron-based member 9.

<Embodiment 2>
In Embodiment 2, an iron-based member packing structure 1 in which the shape of the lid 3 is different from that in Embodiment 1 will be described with reference to FIG. Here, in the second and subsequent embodiments, members having the same functions as those described in the first embodiment are denoted by the same reference numerals.

  In the tray-like container 2 of the present embodiment, the depth of the fitting recess 20 is deeper than that of the first embodiment. Specifically, the depth of the fitting recess 20 is at least half the height of the iron-based member 9. As a result, the arrangement state of the iron-based member 9 in the fitting recess 20 is stabilized. For example, when the iron-based member 9 is fitted in the fitting recess 20 and the tray 3 is covered with the lid 3, the iron-based member 9 is difficult to roll over.

  The lid 3 of the present embodiment is formed in a substantially flat plate shape. The fitting recess 30 of the lid 3 is deep enough to accommodate a small part of the upper end of the iron-based member 9. Although the insertion recess 30 is very shallow, the presence of the insertion recess 30 determines the position of the lid 3 relative to the tray-like container 2.

  The outer peripheral surface of the lid 3 (surface above the paper surface) is substantially flat. Since the outer peripheral surface of the lid 3 is flat, the packing film 4 that is in close contact with the outer peripheral surface is not easily torn, and an extra space is formed between the outer peripheral surface of the lid 3 and the inner peripheral surface of the packing film 4. It becomes difficult.

  Even in the configuration of this example, the peripheral portions 25 and 35 are difficult to directly contact the inner peripheral surface of the packaging film 4, so that the packaging film 4 is not easily torn. The container peripheral portion 25 is made shorter than the illustrated example, the lid peripheral portion 35 is made longer than the illustrated example, and the position where both peripheral portions 25 and 35 are opposed is the thickness direction of the packaging film 4 (up and down direction on the paper surface). If it arrange | positions in the intermediate part of this, the edge part of both the peripheral parts 25 and 35 will become difficult to contact the packing film 4 further.

<Embodiment 3>
In Embodiment 3, a packaging structure 1 of iron-based members in which a plurality of tray-like containers 2 are stacked in multiple stages and the uppermost tray-like container 2 is covered with a lid 3 will be described with reference to FIG.

  The tray-like container 2 of the present example includes a mortar-shaped fitting recess 20 having a narrow bottom and a wide opening. The depth of the fitting recess 20 is longer than the height of the iron-based member 9. Moreover, the connection part 21 which connects the adjacent insertion recessed part 20 is narrower than the space 22 formed between the bottom surfaces of the adjacent insertion recessed part 20. Because of the above shape, when the two tray-like containers 2 are stacked one above the other, the bottom of the upper fitting recess 20 fits inside the lower fitting recess 20 and the lower connecting portion 21 is It fits into the upper space 22. As a result, the bottom surface of the upper insertion recess 20 contacts the top surface of the iron-based member 9.

  The lid 3 of this example is formed in a substantially flat plate shape. The lid 3 includes a pressing portion 31 formed by a portion corresponding to the fitting recess 20 of the upper tray-like container 2 being recessed downward. Therefore, when the lid 3 is put on the tray-like container 2, the pressing portion 31 is fitted into the fitting recess 20, and the bottom surface of the pressing portion 31 is in contact with the upper surface of the iron-based member 9.

  According to the configuration of the third embodiment, a large number of iron-based members 9 can be transported and stored at a time. Of course, since the peripheral edge portions 25 and 35 are difficult to directly contact the inner peripheral surface of the packaging film 4 even in the configuration of this example, the packaging film 4 is hardly broken.

  As a modification of the third embodiment, the depth of the fitting recess 20 can be made smaller than the height T of the iron-based member 9. In that case, gaps can be formed between the tray-like containers 2 and 2 arranged in the vertical direction and between the tray-like container 2 and the lid 3, and it becomes easy to exhaust from the packing film 4.

<Embodiment 4>
At least one of the tray-like container 2 and the lid 3 of the first to third embodiments may be transparent, and the other may be opaque (or colored). In particular, when the lid 3 is transparent, it is easy to visually confirm the type of the iron-based member 9 from the outside of the iron-based member packing structure 1. On the other hand, by coloring the opaque member in a color corresponding to the type of the iron-based member 9, the type of the iron-based member 9 can be determined even from a distance. For example, among the split cores constituting the magnetic core of the reactor, if the inner core piece is disposed inside the coil, the tray-like container 2 is colored yellow and the outer core piece is disposed outside the coil. For example, the tray-like container 2 can be colored blue.

  The packing structure for iron-based members of the present invention can be suitably used particularly for transporting and storing dust cores.

DESCRIPTION OF SYMBOLS 1 Packing structure of iron-type member 2 Tray-shaped container 20 Insertion recessed part 25 Container peripheral part 21 Connection part 22 Space 3 Lid 30 Insertion recessed part 35 Lid peripheral part 31 Holding | suppressing part 4 Packing film 5 Desiccant 9 Iron-based member

Claims (12)

A tray-like container having a plurality of recessed portions into which a plurality of iron-based members are individually fitted; a lid that covers an upper portion of the tray-like container; and the lid on the tray-like container in which the plurality of iron-based members are fitted. A bag-shaped packing film that seals the assembly covered with the inside, and a packing structure of an iron-based member in which the inside of the packing film is maintained in a low-pressure state lower than atmospheric pressure,
The tray-like container includes a container peripheral portion formed by bending the peripheral portion toward the side with the lid,
The lid includes a lid peripheral portion formed by bending the peripheral portion toward a side of the tray-like container,
The end surface of the peripheral edge of the container and the end surface of the peripheral edge of the lid are opposed,
The tray-like container and the lid are made of non-foamable resin,
The packing film is an iron-based member packing structure made of resin.   The tray-like container is bent toward the side where the lid is located after the peripheral side portion is bent toward the side away from the lid, and the peripheral edge of the container is formed at the portion bent toward the lid side. The packaging structure for iron-based members according to claim 1.   The lid is bent toward the side where the tray-shaped container is located after the peripheral portion is bent toward the side away from the tray-shaped container, and the lid peripheral edge is bent toward the side of the tray-shaped container. The packing structure of the iron-based member according to claim 1 or 2, wherein a portion is formed.   The iron-based member packaging structure according to any one of claims 1 to 3, wherein the non-foamable resin is a polyethylene terephthalate resin.   5. The iron-based member packing structure according to claim 1, wherein the packing film is transparent, and at least one of the tray-like container and the lid is also transparent.   The packaging structure for iron-based members according to any one of claims 1 to 5, wherein a desiccant is provided in the packaging film.   The iron-based member packaging structure according to any one of claims 1 to 6, wherein the moisture content of the tray-like container and the lid is less than 1%.   The packing structure for iron-based members according to any one of claims 1 to 7, wherein an inert gas is enclosed in the packing film.   The tray-like container and the lid are pressed toward each other by the packing film, and at least a part of the portion facing the fitting recess on the inner surface of the lid is in contact with the iron-based member, and the iron The packing structure of the iron-based member according to any one of claims 1 to 8, wherein the system member is pressed against at least a part of the inner bottom surface of the fitting recess.   The packaging of the iron-based member according to any one of claims 1 to 9, wherein a plurality of tray-like containers having the same shape are stacked in multiple stages, and the uppermost tray-like container is covered with the lid. Construction.   The packing structure for an iron-based member according to any one of claims 1 to 10, wherein the tray-like container and the lid have the same shape.   The iron-based member packing structure according to any one of claims 1 to 11, wherein the iron-based member is a dust core.

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