【０００１】
【発明の属する技術分野】
本発明は、塩分などの電解質が多い魚介類・海草類などの一夜干し、味醂干し、干物、並びに干し芋や切り干しなど、海産物・農産物の干物等の乾燥用トレーに関する。詳しくは、耐腐食性、耐久性に優れ、安価、軽量で搬送性、積層性、洗浄作業性などに優れた、Ｌ字形枠付き干物等乾燥用トレーに関する。
【０００２】
【従来の技術】
従来の海産物・農産物の干物等の乾燥用トレーは、細竹や葦を編んだ「すのこ」や、木枠にステンレス製金網等を釘等で固定した「干し網」や、ステンレス等のＬ型鋼で構成したＬ字形枠体の底辺棚部にステンレス製エキスパンジョンメタル等の孔空き部材を溶接した「Ｌ字形枠付きトレー」などが用いられてきた。
【０００３】
【発明が解決しようとする課題】
しかしながら、前述の「すのこ」、「干し網」、「Ｌ字形枠付きトレー」等は、耐腐食性、耐久性、使い勝手などで大きな欠点がある。即ち、「すのこ」は素材が植物性であることから、腐食老朽化と加熱乾燥による劣化など、耐久性に問題があるほか、剛性がなく披乾燥物を搭載したままの搬送が困難であり、重ね置きで披乾燥物に重量がかかり披乾燥物が変形するなどの問題がある。また、金網等を木枠に釘などで固定した「干し網」は、披乾燥物や液汁が付着滞積し、含有する塩分などの電解質により、細い金網や釘などが腐食し脱落する問題と、湿潤〜乾燥の繰り返しにより木枠が変形劣化する問題がある。
【０００４】
一方、ステンレス等のＬ型鋼で構成したＬ字形枠体の底辺棚部の上面に、ステンレス製エキスパンジョンメタル等の孔空き部材を溶接法で接続した「Ｌ字形枠付きトレー」は、該Ｌ字形枠体の剛性と空間形成の効果により、披乾燥物を搭載したままの搬送や重ね置きが可能であり、加熱乾燥の温度にも耐えられるなどの利点がある。しかしながら、前述の「すのこ」「干し網」に比べ非常に高価でありながら、腐食・耐久性の問題とＬ型鋼使用による重量過大・取扱い作業性などの本質的な問題がある。この腐食・耐久性の問題は、該Ｌ字形枠体の底辺棚部の上面が、該孔空き部材のバーと孔部により、塩分などの電解質を含んだ披乾燥物や液汁が滞積する凹凸構造になることから、該孔空き部材のバーの溶接部が溶接酸化による肉痩せに加え、局部電池現象により電解腐食し、該孔空き部材が該Ｌ字形枠体から脱落するものである。
【０００５】
【課題を解決するための手段】
本発明は、長方形の薄板鋼板等の短辺をＶ字形若しくはＵ字形に成形した開口部に、披乾燥物の搭載部となるエキスパンジョンメタル等の孔空き部材の周辺端部を挿入し、該Ｖ字形若しくはＵ字形の開口部を狭窄かしめて、該孔空き部材の周辺端部を該薄板鋼板等で被覆一体構造とした後、該被覆一体構造部の周辺部をＬ字型に折り曲げ、隣接する該Ｌ字形に曲げた端部同士を接続してＬ字形枠体を構成してなるＬ字形枠付き干物等乾燥用トレーである。すなわち、披乾燥物を搭載する該孔空き部材の端部を、溶接法に頼らずに、Ｌ形鋼より軽量のＶ字形若しくはＵ字形に成形した該薄板鋼板等で狭窄被覆して、該薄板鋼板等＋該孔空き部材＋該薄板鋼板等の強固な三層一体構造とし、これをＬ字形に曲げてＬ字形枠体を構築することにより、該孔空き部材をＬ字形枠体の中核構造とする強固な構造のＬ字形枠付き干物等乾燥用トレーを製作するものである。これにより、前述した溶接法による従来の「Ｌ字形枠付きトレー」の各種課題を解決するものである。
【０００６】
ここで、該Ｌ型鋼によるＬ字形枠体と該孔空き部材を溶接法で接続した場合に発生する局部電池現象と電解腐食のメカニズムについて考察し、本発明のＬ字形枠付き干物等乾燥用トレーの新規性・進歩性を解説する。
【０００７】
異種の金属が、塩分などの電解質の中で近接すると、それぞれの金属のイオン化傾向の差によって電位差すなわち起電力（電池）が発生し、電解腐食することは知られている。しかしながら、この現象が、腐食しにくいものの代表格であるステンレスやアルマイト処理したアルミ合金等の表面でも、「ある条件下」で発生することは一般には知られていない。この「ある条件下」について、次に解説する。
【０００８】
この「ある条件下」とは、電解質の存在下で、合金表面の金属粒塊が不均一分布であったり、特定の金属粒塊が成長発達している場合である。この場合、局部的に電位差すなわち局部電池が発生し、その部分と周辺が電解腐食する。この金属粒塊の不均一分布や、特定の金属粒塊の成長発達を後天的にもたらす要因は、溶接による加熱溶融であり、異種金属を含有する溶接棒等の溶接助材である。
【０００９】
従来の溶接法による「Ｌ字形枠付きトレー」の構造と使用条件を分析すると、Ｌ型鋼によるＬ字形枠体の底辺は棚構造であり、その上面と該孔空き部材のバーとの積層・溶接部は、凹凸構造で露出状態であり、電解質を多量に含有する披乾燥物や液汁等が滞留・滞積し易い構造である。しかも電解質の作用が活発となる湿潤状態で使用する。したがって、従来の溶接法による「Ｌ字形枠付きトレー」は、構造上ならびに製法上に電解腐食が避けられない重大な欠陥があると言える。
【００１０】
本発明は、かかる問題に鑑みてなされたものである。すなわち、本発明のＬ字形枠付き干物等乾燥用トレーは、該Ｌ字形枠を構成する薄板鋼板等と該孔空き部材との接続方法を、電解腐食し易い溶接法ではなく、三層一体構造の狭窄かしめ方式とし、該接続部の上下の面は、該薄板鋼板等で被覆された平坦構造で、披乾燥物や液汁が滞積し難い構造である。また、該Ｌ字形枠を構成する薄板鋼板等は、曲げ構造にすることにより、必要強度・剛性が得られることから、従来のＬ型鋼に比べ軽量化できる特長がある。更に、この三層一体構造の狭窄かしめ方式による接続方法は、溶接が困難な金属やメッキ処理した部材ならびにプラスチック製や繊維製網などの孔空き部材に対しても、有効な接続方法を提供するもので、使用材質の範囲を大幅に拡大できる利点がある。よって、本発明のＬ字形枠付き干物等乾燥用トレーは、格段の新規性と進歩性があると言える。
【００１１】
なお、本発明のＬ字形枠付き干物等乾燥用トレーは、該Ｌ字形折り曲げ部の端部同士を接続し、該孔空き部材を含めてＬ字形枠体を構成するが、この接続方法は、溶接法やリベット工法等が簡便で実用的である。この接続部は、該Ｌ字形枠体の立上り部で、披乾燥物や液汁が滞積しにくい箇所であるから、溶接法でも電解腐食の影響は少なく強度低下の恐れはない。また、Ｖ字形やＵ字形に成形した該薄板鋼板等の開口部に該孔空き部材を挿入し狭窄かしめる際、予め該孔空き部材の端部の２〜３箇所を電気スポット溶接や接着剤工法等で該Ｖ字形部の内部に点付けすると、狭窄かしめ工程が精度よく効率よくできる。この場合の電気スポット溶接は、位置決めのための仮止めが目的であり、接続強度を要求するものではないことから、電解腐食による強度低下を問題視する必要はない。該薄板鋼板等のＶ字形やＵ字形の開口角度は、電気スポット溶接等による仮止め作業と狭窄かしめ工程の作業性を考慮して２０〜４５度の角度が好ましい。また、狭窄かしめ工程では、硬質ゴム等のクッション材を該Ｖ字形若しくはＵ字形の開口部にあてがいプレスすると、該Ｖ字形若しくはＵ字形の開口部の端部が該孔空き部材の孔空き部に隙間なく食い込む形でかしめることができる。これにより接続部への披乾燥物等の滞積を防止でき、洗浄作業性も向上する。
【００１２】
【実施例】
本発明のＬ字形枠付き干物等乾燥用トレーを、図面を用いて詳述する。図１は、本発明の一実施例になるＬ字形枠付き干物等乾燥用トレーである。（ａ）はＬ字形枠付き干物乾燥用トレーの全体を示す斜視図。（ｂ）はＳＵＳ３０４鋼板のＶ字形成形品の斜視図。（ｃ）は披乾燥物搭載部の孔空き部材であるＳＵＳ３０４製エキスパンジョンメタルの平面図。（ｄ）は（ｂ）のＶ字形開口部に（ｃ）の端部を挿入仮止めした断面図。（ｅ）は三層一体構造部をＬ字形に曲げ立上げた断面図。
【００１３】
次に、本発明の一実施例の製作過程を以下に示す。▲１▼大きさが、短辺９６ｍｍ×長辺（イ）５９４ｍｍ、及び短辺９６ｍｍ×長辺（イ）１１９８ｍｍのＳＵＳ３０４鋼板（厚み１．０ｍｍ）の短辺中央部（ロ）を、溝付き曲げ型で図１（ｂ）のように曲げ、開口角度３５度のＶ字形成形品を製作した。▲２▼披乾燥物を搭載する孔空き部材となる、大きさが短辺（ハ）６２０ｍｍ×長編（ニ）１２２５ｍｍのＳＵＳ３０４製エキスパンジョンメタル（厚み１．２ｍｍ、メッシュ短辺１２ｍｍ×長辺３０．５ｍｍ）の四角（ホ）を図１（ｃ）のように１２．５ｍｍ×１２．５ｍｍ切除した。▲３▼図１（ｄ）に示すように、▲１▼のＶ字形成形品の開口部に▲２▼の孔空き部材の端部を挿入し、重複幅（ヘ）３２．５ｍｍの位置で、該孔空き部材端部のバーの２〜３箇所を該Ｖ字形成形品に電気スポット溶接で仮止めした。同様にして、該孔空き部材の反対側の端部も▲１▼のＶ字形成形品に仮止めした。▲４▼次に、Ｖ字形成形品の開口部を加圧平坦化して狭窄かしめ、該孔空き部材の端部を中核とする三層一体構造で強固に接続した。▲５▼同様にして、該孔空き部材の残りの端部も該Ｖ字型成形品と三層一体構造で強固に接続した。▲６▼次に、該孔空き部材周辺の該三層一体構造部を、溝付き曲げ型で、図１（ｅ）のように端部から２８ｍｍの位置をＬ字形に曲げ立上げた。このとき該三層一体構造部の中核である該孔空き部材の立上げ長さは１２．５ｍｍとなる。▲７▼▲６▼の各Ｌ字形立上げ部の端部同士を溶接法で接続してＬ字形枠体を形成し、Ｌ字形枠付き干物等乾燥用トレーを製作した。
【００１４】
以上により製作した本発明のＬ字型枠付き干物等乾燥用トレーは、大きさが、Ｌ字形枠体の高さ（ト）２８ｍｍ×幅（チ）１２００ｍｍ×奥行き（リ）５９５ｍｍで、重量は４．５ｋｇである。なお、従来のＬ型鋼を枠体とした溶接法による「Ｌ字形枠付きトレー」の重量は、その１．５倍の６．７ｋｇである。
【００１５】
【発明の効果】
請求項１記載の発明は、次に示す従来のＬ型鋼を枠体とした溶接法による「Ｌ字形枠付きトレー」の重大な欠陥を改良するものである。
（１）該Ｌ形枠体と該孔空き部材接続部の電解腐食による脱落、耐久性不良の問題に対し、原因である溶接接続法を廃止して、これに替わる該三層一体構造の接続法を考案し、根本的に改善した。
（２）電解腐食の促進要因であり、清掃作業が困難な、披乾燥物や液汁等の滞積し易い該溶接接続部の凹凸構造の問題に対し、接続部が平坦な該三層一体構造の接続法を考案し、根本的に改善した。
（３）重量物であるＬ型鋼の枠体使用による重量過大・取扱い作業性不良の問題に対し、軽量の薄板鋼板等を使用した該三層一体構造のＬ形枠体を考案し、重量を２／３に低減して取扱い作業性を改善した。
（４）併せて使用部材費を低減した。
（５）使用部材が溶接可能な材質に限定される問題に対し、該三層一体構造の接続法を考案したことにより、用途目的に応じて溶接困難な材質の選択も可能にした。
以上示した通り、本発明のＬ字形枠付き干物等乾燥用トレーは、従来のＬ型鋼を枠体とした溶接法による「Ｌ字形枠付きトレー」の重大な欠陥を改良し、耐腐食性・耐久性に優れ、安価、軽量、搬送性、積層性に優れ、清掃作業性など使い勝手も優れた、Ｌ字形枠付き干物等乾燥用トレーを提供するものである。
よって本発明のＬ字形枠付き干物等乾燥用トレーは、格段の新規性と進歩性があると言える。
【図面の簡単な説明】
【図１】図１は、本発明の一実施例になるＬ字形枠付き干物等乾燥用トレー。
（ａ）はＬ字形枠付き干物乾燥用トレーの全体を示す斜視図。
（ｂ）はＳＵＳ３０４鋼板のＶ字形成形品の斜視図。
（ｃ）は披乾燥物搭載部の孔空き部材であるＳＵＳ３０４製エキスパンジョンメタルの平面図。
（ｄ）は（ｂ）のＶ字形開口部に（ｃ）の端部を挿入仮止めした断面図。
（ｅ）は三層一体構造部をＬ字形に曲げ立上げた断面図。
【図２】従来の「Ｌ字形枠付きトレー」のＬ型鋼と孔空き部材の溶接接続図。
【符号の説明】
１ ＳＵＳ製の薄板鋼板等
２ 披乾燥物搭載部のＳＵＳ製エキスパンジョンメタル等の孔空き部材
３ 該薄板鋼板等のＶ字型成形品
４ 仮止めスポット溶接箇所
５ 該薄板鋼板等と該孔空き部材の三層一体構造部
６ Ｌ字形立上げ部・Ｌ字形枠体
７ Ｌ字形枠体の端部接続部
８ Ｌ型鋼によるＬ字形枠体
９ Ｌ型鋼と孔空き部材の溶接接続部
１０ 披乾燥物や液汁が滞積し易い部位[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tray for drying seafood and agricultural products such as dried seafood and agricultural products such as dried seafood, seaweed, and dried seaweed and dried seaweed and dried seaweeds and dried seaweeds. More specifically, the present invention relates to a tray for drying a dried product such as dried fish with an L-shaped frame, which is excellent in corrosion resistance and durability, inexpensive, lightweight, and excellent in transportability, lamination properties, cleaning workability and the like.
[0002]
[Prior art]
Conventional trays for drying dried seafood and agricultural products are made of thin bamboo or reeds, such as "Sonoko", "Dry net" with a stainless steel wire mesh fixed on a wooden frame with nails, or L-shaped steel such as stainless steel. A “tray with an L-shaped frame” in which a perforated member such as a stainless steel expansion metal is welded to a bottom shelf of the L-shaped frame thus configured has been used.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned "sunoko", "dried net", "tray with L-shaped frame" and the like have serious drawbacks in corrosion resistance, durability, usability, and the like. In other words, since the material is vegetable, it has problems in durability, such as corrosion aging and deterioration due to heating and drying, and it has no rigidity, and it is difficult to transport it with the dried material mounted. There are problems such as the weight of the dried product being overlaid and the dried product being deformed. In addition, `` dried nets '' in which wire meshes and the like are fixed to wooden frames with nails have the problem that dried wire and sap adhere and accumulate, and thin wire meshes and nails corrode and fall off due to electrolytes such as salt contained. There is a problem that the wooden frame is deformed and deteriorated due to repetition of wet to dry.
[0004]
On the other hand, an “L-shaped frame-attached tray” in which a perforated member such as stainless steel expansion metal is connected to the upper surface of the bottom shelf of an L-shaped frame made of L-shaped steel such as stainless steel by a welding method. Due to the rigidity of the character-shaped frame and the effect of forming the space, it is possible to carry or stack the dried articles mounted thereon, and there are advantages such as withstanding the temperature of heating and drying. However, although it is much more expensive than the above-mentioned "sunoko" and "dried net", there are inherent problems such as corrosion and durability, and excessive weight and handling workability due to the use of L-shaped steel. The problem of corrosion and durability is that the upper surface of the bottom shelf of the L-shaped frame is uneven due to the accumulation of dried matter and sap containing electrolytes such as salt due to the bars and holes of the perforated member. Due to the structure, the welded portion of the bar of the perforated member becomes thinner due to welding oxidation, and electrolytically corrodes due to a local battery phenomenon, so that the perforated member falls off from the L-shaped frame.
[0005]
[Means for Solving the Problems]
The present invention inserts a peripheral end of a perforated member such as an expansion metal to be a mounting portion for a dried product in an opening formed by forming a short side of a rectangular thin steel plate into a V-shape or a U-shape, The V-shaped or U-shaped opening is narrowed and crimped, and the peripheral end of the perforated member is covered with the thin steel plate or the like to form an integral structure. Then, the periphery of the covering integrated structure is bent into an L-shape. An L-shaped frame-shaped drying tray with an L-shaped frame formed by connecting adjacent ends bent into the L-shape. That is, the end of the perforated member on which the dried material is mounted is not narrowly covered with the thin steel plate or the like formed into a V-shape or U-shape, which is lighter than an L-shaped steel, without relying on a welding method. The core structure of the L-shaped frame is formed by forming a strong three-layer integrated structure of a steel plate or the like + the perforated member + the thin steel plate or the like, and bending the L-shaped frame to form an L-shaped frame. And a tray for drying a dried product such as dried fish with an L-shaped frame having a strong structure. This solves the various problems of the conventional "tray with L-shaped frame" by the welding method described above.
[0006]
Here, the local battery phenomenon and the mechanism of electrolytic corrosion that occur when the L-shaped frame made of the L-shaped steel and the perforated member are connected by a welding method are considered, and the tray for drying a dried product such as dried fish with the L-shaped frame according to the present invention is considered. Explains the novelty and inventive step of.
[0007]
It is known that when different kinds of metals come close to each other in an electrolyte such as a salt, a potential difference, that is, an electromotive force (battery) is generated due to a difference in ionization tendency of each metal, and electrolytic corrosion occurs. However, it is not generally known that this phenomenon occurs under "under certain conditions" even on the surface of stainless steel or alumite-treated aluminum alloy, which is a typical example of those hardly corroded. The "under certain conditions" will be described next.
[0008]
The “under certain conditions” refers to a case where the metal particles on the alloy surface are unevenly distributed or a specific metal particle is growing and developing in the presence of the electrolyte. In this case, a potential difference, that is, a local battery is locally generated, and the portion and its periphery are electrolytically corroded. A factor that causes the uneven distribution of the metal agglomerates and the growth and development of the specific metal agglomerates is heating and melting by welding, and is a welding aid such as a welding rod containing a dissimilar metal.
[0009]
An analysis of the structure and operating conditions of the "tray with L-shaped frame" by the conventional welding method shows that the bottom of the L-shaped frame made of L-shaped steel has a shelf structure, and the lamination and welding of the upper surface and the bar of the perforated member are performed. The portion is in an exposed state with a concavo-convex structure, and has a structure in which dried matter, liquid juice, and the like containing a large amount of electrolyte easily accumulate and accumulate. Moreover, it is used in a wet state where the action of the electrolyte becomes active. Therefore, it can be said that the “tray with an L-shaped frame” formed by the conventional welding method has a serious defect in which electrolytic corrosion is unavoidable in structure and manufacturing method.
[0010]
The present invention has been made in view of such a problem. That is, the drying tray for dried fish with an L-shaped frame according to the present invention uses a three-layer integrated structure instead of a welding method that easily causes electrolytic corrosion and a method of connecting the thin steel plate or the like constituting the L-shaped frame and the perforated member. And the upper and lower surfaces of the connecting portion have a flat structure covered with the thin steel plate or the like, and have a structure in which dried matter and liquid juice are unlikely to accumulate. Further, the thin steel plate or the like constituting the L-shaped frame has a feature that the required strength and rigidity can be obtained by forming it into a bent structure, so that the weight can be reduced as compared with the conventional L-shaped steel. Further, the connection method by the constriction caulking method of the three-layer integrated structure provides an effective connection method even for a metal or a plated member that is difficult to weld and a perforated member such as a plastic or fiber net. This has the advantage that the range of materials used can be greatly expanded. Therefore, it can be said that the drying tray with an L-shaped frame according to the present invention has remarkable novelty and inventive step.
[0011]
In addition, the drying tray such as dried fish with an L-shaped frame of the present invention connects the ends of the L-shaped bent portions to form an L-shaped frame including the perforated member. The welding method and the rivet method are simple and practical. Since the connecting portion is a rising portion of the L-shaped frame and is a place where dried matter and liquid juice are unlikely to accumulate, the effect of electrolytic corrosion is small even by the welding method, and there is no possibility of a decrease in strength. Further, when inserting the perforated member into the opening of the thin steel plate or the like formed into a V-shape or U-shape and tightening the hole, a few spots at the ends of the perforated member are previously subjected to electric spot welding or adhesive. By spotting the inside of the V-shaped portion by a construction method or the like, the stenosis caulking process can be performed accurately and efficiently. Since electric spot welding in this case is intended for temporary fixing for positioning and does not require connection strength, there is no need to consider a decrease in strength due to electrolytic corrosion. The V-shaped or U-shaped opening angle of the thin steel plate or the like is preferably an angle of 20 to 45 degrees in consideration of the workability of the temporary fixing work by electric spot welding and the like and the narrowing and caulking process. Further, in the narrowing and caulking step, when a cushion material such as hard rubber is applied to the V-shaped or U-shaped opening and pressed, the end of the V-shaped or U-shaped opening is formed in the hole of the holed member. It can be swaged without any gaps. As a result, accumulation of dry matter and the like on the connection portion can be prevented, and the cleaning workability is improved.
[0012]
【Example】
DETAILED DESCRIPTION OF THE INVENTION A tray for drying a dried fish or the like with an L-shaped frame according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a tray for drying a dried product such as dried fish with an L-shaped frame according to an embodiment of the present invention. (A) is a perspective view showing the whole of the tray for drying dried fish with an L-shaped frame. (B) is a perspective view of a V-shaped product of SUS304 steel plate. (C) is a plan view of a SUS304 expansion metal which is a perforated member of the dried product mounting portion. (D) is sectional drawing which inserted and temporarily fixed the edge part of (c) to the V-shaped opening part of (b). (E) is a cross-sectional view in which the three-layer integrated structure is bent and raised in an L shape.
[0013]
Next, a manufacturing process of one embodiment of the present invention will be described below. (1) The short side center (b) of a SUS304 steel plate (1.0 mm thick) with a short side of 96 mm x long side (a) 594 mm and a short side of 96 mm x long side (a) 1198 mm is grooved. By bending as shown in FIG. 1B using a bending die, a V-shaped product having an opening angle of 35 degrees was manufactured. (2) SUS304 expansion metal with a short side (c) of 620 mm long and a length of 1225 mm (short side: 12 mm, mesh short side: 12 mm x long side) A square (30.5 mm) was excised as 12.5 mm × 12.5 mm as shown in FIG. {Circle around (3)} As shown in FIG. 1 (d), insert the end of the perforated member of [2] into the opening of the V-shaped molded product of [1], and at the position of the overlap width (f) 32.5 mm A few spots of the bar at the end of the perforated member were temporarily fixed to the V-shaped product by electric spot welding. Similarly, the opposite end of the perforated member was temporarily fixed to the V-shaped product (1). {Circle around (4)} Next, the opening of the V-shaped product was flattened by pressurization and flattened, and tightly connected in a three-layer integrated structure with the end of the perforated member as the core. (5) Similarly, the remaining end of the perforated member was firmly connected to the V-shaped molded product in a three-layer integrated structure. {Circle around (6)} Next, the three-layer integrated structure around the perforated member was bent into a L-shape at a position 28 mm from the end as shown in FIG. At this time, the rising length of the perforated member, which is the core of the three-layer integrated structure, is 12.5 mm. The ends of each of the L-shaped rising portions of (7) and (6) were connected to each other by a welding method to form an L-shaped frame, and a tray for drying, such as dried fish, with an L-shaped frame was manufactured.
[0014]
The tray for drying dried fish and the like with the L-shaped frame of the present invention manufactured as described above has a size of 28 mm in height (g) × 1200 mm in width (h) × 1200 mm in depth (g) of 595 mm of the L-shaped frame, and weighs in. It is 4.5 kg. In addition, the weight of the "tray with an L-shaped frame" by a welding method using a conventional L-shaped steel frame is 1.5 times that of 6.7 kg.
[0015]
【The invention's effect】
The first aspect of the present invention is to improve a serious defect of the "tray with an L-shaped frame" by the following conventional welding method using an L-shaped steel as a frame.
(1) In connection with the problem of dropout of the L-shaped frame and the perforated member connection portion due to electrolytic corrosion and poor durability, the welding connection method which is the cause is abolished, and the connection of the three-layer integrated structure is replaced. A law was devised and fundamentally improved.
(2) The three-layer integrated structure in which the connection is flat against the problem of the uneven structure of the welding connection, which is a factor promoting electrolytic corrosion and is difficult to clean, and is liable to accumulate dried matter, liquid juice, etc. A connection method was devised and fundamentally improved.
(3) To solve the problem of excessive weight and poor handling workability due to the use of heavy L-shaped steel frame, we devised the three-layer integrated L-shaped frame using lightweight thin steel plate and the like, and reduced the weight. It was reduced to 2/3 to improve the handling workability.
(4) The cost of materials used has been reduced.
(5) To solve the problem that the members to be used are limited to weldable materials, by devising the connection method of the three-layer integrated structure, it is possible to select a material that is difficult to weld according to the purpose of use.
As described above, the tray for drying dried fish and the like with an L-shaped frame according to the present invention improves the serious defect of the “tray with an L-shaped frame” by a welding method using a conventional L-shaped steel as a frame, and provides corrosion resistance. An object of the present invention is to provide a tray for drying dried fish and the like with an L-shaped frame, which is excellent in durability, inexpensive, lightweight, excellent in transportability and lamination properties, and excellent in usability such as cleaning workability.
Therefore, it can be said that the tray for drying, such as dried fish, with an L-shaped frame of the present invention has remarkable novelty and inventive step.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram illustrating a tray for drying dried fish and the like with an L-shaped frame according to an embodiment of the present invention.
(A) is a perspective view showing the whole of the tray for drying dried fish with an L-shaped frame.
(B) is a perspective view of a V-shaped product of SUS304 steel plate.
(C) is a plan view of a SUS304 expansion metal which is a perforated member of the dried product mounting portion.
(D) is sectional drawing which inserted and temporarily fixed the edge part of (c) to the V-shaped opening part of (b).
(E) is a cross-sectional view in which the three-layer integrated structure is bent and raised in an L shape.
FIG. 2 is a welding connection diagram of an L-shaped steel and a holed member of a conventional “tray with an L-shaped frame”.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 SUS thin steel plate etc. 2 Perforated member, such as SUS expansion metal, etc. of the drying material mounting part 3 V-shaped molded product such as thin steel plate 4 Temporary spot welding spot 5 Thin steel plate etc. and hole Three-layer integrated structure portion of empty member 6 L-shaped rising portion / L-shaped frame 7 L-shaped frame end connecting portion 8 L-shaped frame 9 made of L-shaped steel Welded connecting portion 10 between L-shaped steel and perforated member 10 Sites where dry matter and sap easily accumulate
