JP2008037344A - Fastening fitting for lashing chain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening fitting in which mounting workability is not complicated and fear of that a welded portion of a pressing fitting is removed or the pressing fitting is deformed even if it is repeatedly trodden by a caterpillar of a heavy vehicle at any time is made less. <P>SOLUTION: Both side edges in a width direction of the pressing fitting (20) having a cross section shape having a center in a width direction swelled as compared with both side edges in the width direction are fixed to a steel plate deck (31) by welding, and a base part (10A) of a D type eye plate (10) engaged with a hook of a lashing chain is inclinably engaged with the pressing fitting. Whereas, the pressing fitting is manufactured by a steel material having a hot forging organization. Both ends (21) in a longitudinal direction of the pressing fitting may be swelled/formed to a thick portion as compared with a central portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明はラッシングチェンの固縛金具に関し、特に鋼板デッキへの取付け作業性を煩雑化させず、しかも重車輛のキャタピラ等で何度も繰り返し踏みつけられても、押さえ金具の溶接箇所が外れたりあるいは押さえ金具が変形するおそれを少なくした固縛金具に関する。   The present invention relates to a lashing chain lashing bracket, and in particular, does not complicate the workability of mounting to a steel plate deck, and even if it is repeatedly stepped on with a caterpillar of a heavy vehicle, the welded part of the pressing bracket may come off or The present invention relates to a securing metal fitting that is less likely to be deformed.

例えば、船舶で積み荷を運搬する場合、積み荷をデッキに搭載し、積み荷から延びたラッシングチェン先端のフックをカーデッキ上に係止させることによりラッシングチェンを固縛し、積み荷を固定し荷崩れを防止することが行われる。   For example, when carrying a load on a ship, the load is mounted on the deck, and the hook at the tip of the lashing chain extending from the load is locked onto the car deck to secure the lashing chain and fix the load to prevent collapse. To be done.

従来、一般構造用圧延鋼材の鋼板を所定の大きさに切断し、冷間曲げ加工によって中央から∩形状に折り曲げて押さえ金具を製作し、押さえ金具にＤ型リング状のアイプレートの基部を傾倒自在に係止するとともに、押さえ金具の幅方向の両側縁を船舶の鋼板デッキに溶接して固定するようにしたラッシングチェンの固縛金具が採用されていた。   Conventionally, rolled steel sheets for general structural use are cut into a predetermined size, bent into a bowl shape from the center by cold bending, and a press bracket is manufactured. The base of the D-shaped ring-shaped eye plate is tilted to the press bracket. A lashing chain lashing metal fitting that was freely locked and was fixed by welding both side edges in the width direction of the metal fitting to the steel plate deck of the ship.

ところで、車輛の運搬船ではデッキ上に多数の車輛を搭載する関係上、押さえ金具が例えば重車輛のキャタピラで何度も繰り返し踏みつけられるが、押さえ金具によっては溶接が外れたりあるいは変形してしまうことがあった。そして、押さえ金具の変形の仕方によってはアイプレートを起立させるのに大きな力を必要とし、車輛搭載の作業性が悪化していた。   By the way, in the case of a vehicle carrier ship, because of the large number of vehicles mounted on the deck, the presser bracket can be stepped on many times with, for example, the caterpillar of a heavy vehicle, but depending on the presser bracket, welding may be removed or deformed. there were. Depending on how the presser fitting is deformed, a large force is required to erect the eye plate, and the workability of mounting the vehicle has deteriorated.

これに対し、円盤状をなし、デッキに溶接等で固定され、フックを引っ掛ける係止ホールが形成された固縛金具、あるいは逆円盤状のソケット内にフックを引っ掛ける係止バーを十字状に固定し、これをデッキに穿設した取付け穴に嵌め込んで溶接等で固定するようにした固縛金具が提案されている（特許文献１、特許文献２、特許文献３）。   On the other hand, it has a disk shape and is fixed to the deck by welding, etc., and the locking bar that hooks the hook in the reverse disk-shaped socket is fixed in a cross shape. And the securing metal fitting which fits this in the attachment hole drilled in the deck, and was fixed with welding etc. is proposed (patent document 1, patent document 2, patent document 3).

特開平１１−２７８３６８号公報Japanese Patent Laid-Open No. 11-278368 実公平０４−４３４３５号公報No. 04-43435 実公平０３−４７０３６号公報No. 03-47036

しかし、特許文献１〜３記載の固縛金具では円盤の全周にわたって連続的に又は間欠的に溶接を行う必要があって、固縛金具の取付け作業が非常に煩雑である。しかも、特許文献３記載の固縛金具ではデッキに取付け穴を穿設しなければならず、取付け作業性がさらに悪いという問題があった。   However, in the securing metal fittings described in Patent Documents 1 to 3, it is necessary to perform welding continuously or intermittently over the entire circumference of the disk, and the attaching work of the securing metal fitting is very complicated. In addition, the securing metal fitting described in Patent Document 3 has a problem in that the mounting hole must be formed in the deck, and the mounting workability is further deteriorated.

本発明はかかる問題点に鑑み、デッキへの取付け作業性を煩雑化させず、しかも重車輛のキャタピラ等で何度も繰り返し踏みつけられても押さえ金具の溶接箇所が外れたりあるいは押さえ金具が変形するおそれを少なくしたラッシングチェンの固縛金具を提供することを課題とする。   In view of such a problem, the present invention does not complicate the mounting workability to the deck, and even if it is repeatedly stepped on by a caterpillar or the like of a heavy vehicle, the welded part of the pressing metal comes off or the pressing metal is deformed. It is an object of the present invention to provide a lashing chain securing metal fitting with reduced fear.

そこで、本発明に係るラッシングチェンの固縛金具は、幅方向中央が幅方向両側縁に比して盛り上がった断面形状を有する押さえ金具の幅方向両側縁が鋼板デッキに溶接によって固定され、該押さえ金具にはラッシングチェンのフックが係止されるＤ型アイプレートの基部が傾倒自在に係止されている一方、上記押さえ金具は熱間鍛造組織を有する鋼材によって製作されていることを特徴とする。   Accordingly, the lashing chain lashing metal fitting according to the present invention has a pressing metal fitting having a cross-sectional shape in which the center in the width direction is raised as compared with the both side edges in the width direction, and is fixed to the steel plate deck by welding. The base of the D-type eye plate, to which the hook of the lashing chain is locked, is tiltably locked to the metal fitting, while the pressing metal is made of a steel material having a hot forged structure. .

従来の固縛金具では一般構造用圧延鋼材の鋼板を冷間曲げ加工することによって断面ほぼ半円弧状の押さえ金具を製作していたが、デッキ上に膨大な数の固縛金具を取付ける必要があるので、押さえ金具の幅方向の両側縁に溶接開先を加工することはコスト的に困難であり、押さえ金具の幅方向両側縁をそのまま溶接すると、溶込みが不十分となって十分な溶接強度が得られないことがある。   In conventional lashing brackets, a general structural rolled steel plate was cold-bent to produce a pressing bracket with a semi-circular cross section. However, it is necessary to mount a large number of lashing brackets on the deck. Therefore, it is difficult in terms of cost to process the weld groove on both side edges in the width direction of the presser fitting. Strength may not be obtained.

また、一般構造用圧延鋼材の冷間加工組織は比較的大きな残留応力が存在し、結晶組織も粗く、熱影響部と非熱影響部との間の物性の差が大きい。その結果、重車輛のキャタピラ等によって繰り返し踏みつけられ、Ｄ型アイプレートから大きな引っ張り力が繰り返し作用すると、押さえ金具、特に長手方向の両端の溶接箇所で溶接外れが引き起こされていたものと考えられる。   Further, the cold-worked structure of the general structural rolled steel has a relatively large residual stress, the crystal structure is rough, and the difference in physical properties between the heat-affected zone and the non-heat-affected zone is large. As a result, it was considered that when the heavy treadle was repeatedly stepped on by a caterpillar or the like, and a large pulling force acted repeatedly from the D-type eyeplate, the welding was caused at the press fitting, particularly at the welded portions at both ends in the longitudinal direction.

本発明の特徴の１つは一般構造用圧延鋼材を熱間鍛造することによって断面ほぼ半円弧状の押さえ金具を製作するようにした点にある。   One of the features of the present invention resides in that a press fitting having a substantially semicircular cross section is manufactured by hot forging a general structural rolled steel material.

これにより、押さえ金具の熱間鍛造時に幅方向の両側縁に望ましい形状の溶接開先を同時に加工することができ、押さえ金具の幅方向両側縁の溶接開先を溶接すると、十分に溶込み、大きな溶接強度が得られる。   As a result, it is possible to simultaneously process a weld groove of a desired shape on both side edges in the width direction at the time of hot forging of the press fitting, and when welding the weld grooves on both side edges of the press fitting, Large welding strength can be obtained.

また、一般構造用圧延鋼材の熱間鍛造組織は残留応力が冷間加工組織に比して少なく、しかも結晶組織も整粒されており、熱影響部と非熱影響部との間の物性の差は小さい。その結果、船上鋼板デッキに対して押さえ金具を十分な強度でもって溶接することができるので、過大な荷重や衝撃によって溶接外れが引き起こされることは少なくなる。   In addition, the hot forged structure of general structural rolled steel has less residual stress than the cold-worked structure, and the crystal structure is also sized, and the physical properties between the heat-affected zone and the non-heat-affected zone are The difference is small. As a result, since the presser fitting can be welded to the onboard steel plate deck with sufficient strength, it is less likely that the welding will be detached due to an excessive load or impact.

その結果、押さえ金具が重車輛のキャタピラ等によって繰り返し踏みつけられ、Ｄ型アイプレートから大きな引っ張り力が繰り返し作用しても、溶接が外れることは少なく、固縛金具の信頼性を保証できる。   As a result, even if the presser fitting is repeatedly stepped on by a caterpillar or the like of the heavy vehicle and a large pulling force acts repeatedly from the D-type eyeplate, the welding is rarely released, and the reliability of the securing metal fitting can be guaranteed.

また、押さえ金具の幅方向両側縁の直線部分をデッキに溶接すればよく、特許文献１〜３記載の固縛金具のように円盤の全周にわたって連続的に又は間欠的に溶接を行う必要がないので、押さえ金具の取付け作業が簡単である。   Further, it is only necessary to weld the straight portions on both side edges in the width direction of the holding metal to the deck, and it is necessary to perform welding continuously or intermittently over the entire circumference of the disk like the securing metal fittings described in Patent Documents 1 to 3. Because there is no, mounting work of the presser bracket is easy.

押さえ金具は均一な肉厚としてもよいが、踏みつけ荷重に確実に耐え得る形状とするのが好ましい。そこで、押さえ金具の長手方向の両端部を中央部分に比して厚肉に盛り上がり形成するのがよい。これにより、押さえ金具が重車輛のキャタピラ等によって繰り返し踏みつけられても、押さえ金具の両端の厚肉部分が踏みつけ荷重を分散して受け、耐変形性能が向上するので、Ｄ型アイプレートを通常の力でもって軽く起立させることができ、車輛搭載の作業性を保証できる。   The presser fitting may have a uniform wall thickness, but it is preferable to have a shape that can reliably withstand the stepping load. Therefore, it is preferable that both end portions in the longitudinal direction of the presser fitting are formed so as to be thicker than the center portion. As a result, even if the presser bracket is repeatedly stepped on by a heavy vehicle caterpillar, etc., the thick wall portions at both ends of the presser bracket receive the stepping load in a distributed manner and the deformation resistance is improved. It is possible to stand up lightly with force and to guarantee the workability of mounting on a vehicle.

押さえ金具の両端部と中央部分の厚みの差は特に限定されず、１ｍｍないし１．５ｍｍ以上あれば十分である。また、両端の厚肉部分の長さも特に限定されず、２ｍｍないし３ｍｍ以上あれば十分である。   The difference in thickness between the both end portions and the central portion of the presser fitting is not particularly limited, and 1 mm to 1.5 mm or more is sufficient. Moreover, the length of the thick part of both ends is not specifically limited, 2 mm thru | or 3 mm or more is enough.

押さえ金具は熱間鍛造し得る鋼材であれば特に材質は限定されず、例えばＳＳ３３０、ＳＳ４００、ＳＳ４９０、ＳＳ５４０などの一般構造用圧延鋼材を採用することができる。また、Ｄ型アイプレートはラッシングチェンのフックを係止できれば特に材質は限定されず、例えば合金鋼などを採用することができる。   The material of the presser fitting is not particularly limited as long as it is a steel material that can be hot forged. For example, general structural rolled steel materials such as SS330, SS400, SS490, and SS540 can be adopted. Further, the material of the D-type eye plate is not particularly limited as long as the hook of the lashing chain can be locked. For example, alloy steel or the like can be used.

以下、本発明を図面に示す具体例に基づいて詳細に説明する。図１ないし図４は本発明に係るラッシングチェンの固縛金具の好ましい実施形態を示す。本例のラッシングチェンの固縛金具はＤ型アイプレート１０と押さえ金具２０とから構成され、Ｄ型アイプレート１０は例えば合金鋼を用いてＤ型リング形状に製作されている。   Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 4 show a preferred embodiment of a lashing chain securing metal fitting according to the present invention. The lashing chain securing metal fitting of this example is composed of a D-type eye plate 10 and a holding metal fitting 20, and the D-type eye plate 10 is manufactured in a D-shaped ring shape using, for example, alloy steel.

押さえ金具２０は一般構造用圧延鋼材、例えばＳＳ４００の鋼材を所定寸法に切断し、熱間鍛造によって幅方向の中央が両側縁に比して盛り上がった形状に加工されている。この押さえ金具２０は長手方向の両端部２１が帯状にかつ中央部分に比して厚肉に形成され、又幅方向両側縁には溶接開先２２が形成されている。   The presser fitting 20 is formed by cutting a general structural rolled steel material, for example, a steel material of SS400, into a predetermined size, and by hot forging, the center in the width direction rises as compared to the side edges. The presser fitting 20 has both end portions 21 in the longitudinal direction formed in a strip shape and thicker than the center portion, and weld grooves 22 are formed on both side edges in the width direction.

Ｄ型アイプレート１０の基部１０Ａに押さえ金具２０を跨がせ、押さえ金具２０の溶接開先２１を船舶のデッキ３１に溶接すると、本例のラッシングチェンの固縛金具が得られる。図中３０は溶接ビードである。   When the presser fitting 20 is straddled on the base portion 10A of the D-type eye plate 10 and the welding groove 21 of the presser fitting 20 is welded to the deck 31 of the ship, the lashing chain securing metal fixture of this example is obtained. In the figure, reference numeral 30 denotes a weld bead.

自動車を船舶に搭載して固定する場合、Ｄ型アイプレート１０を押さえ金具２０の廻りに起立させ、自動車から延びるラッシングチェンの先端フックをＤ型アイプレート１０に引っ掛けると、ラッシングチェンを固縛することができる。   When an automobile is mounted and fixed on a ship, the D-type eye plate 10 is erected around the holding metal 20 and the hook of the lashing chain extending from the automobile is hooked on the D-type eye plate 10 to lock the lashing chain. be able to.

Ｄ型アイプレート１０を押さえ金具２０の廻りに倒している場合であっても押さえ金具２０はデッキ３１から盛り上がっており、自動車の積み卸し時に重車輛のキャタピラによって何度も踏みつけられる。   Even when the D-type eye plate 10 is tilted around the presser bracket 20, the presser bracket 20 rises from the deck 31, and can be stepped on many times by a caterpillar of a heavy vehicle when loading and unloading a car.

本例の固縛金具では一般構造用圧延鋼材を熱間鍛造することによって押さえ金具２０を製造しており、幅方向の両側縁に望ましい形状の溶接開先２２を熱間鍛造時に加工することができるので、溶接開先２２を鋼板デッキ３１に十分な溶け込みでもって溶接することができ、高い強度の溶接ビード３２が形成される。   In the securing metal fitting of this example, the holding metal fitting 20 is manufactured by hot forging a general structural rolled steel material, and the welding groove 22 having a desired shape on both side edges in the width direction can be processed during the hot forging. Therefore, the weld groove 22 can be welded to the steel plate deck 31 with sufficient penetration, and a high strength weld bead 32 is formed.

しかも、押さえ金具２０の長手方向の両端部２１を厚肉に形成しているので、重車輛のキャタピラ等から押さえ金具２１に過大な荷重が加わると、過大な荷重は厚肉の両端部２１で分散して受けられる。   In addition, since both end portions 21 in the longitudinal direction of the presser fitting 20 are formed thick, if an excessive load is applied to the presser fitting 21 from a caterpillar or the like of a heavy vehicle, the excessive load is applied to the thick end portions 21. Received in a distributed manner.

その結果、押さえ金具２０が重車輛のキャタピラ等によって何度も繰り返して踏みつけられても押さえ金具２０の溶接ビード３０にクラックが入ったり欠損したりすることはなく、所定の溶接強度を維持するので、溶接外れが発生するおそれは少ない。   As a result, even if the presser fitting 20 is repeatedly stepped on by a caterpillar or the like of a heavy vehicle, the weld bead 30 of the presser fitting 20 is not cracked or lost, and a predetermined welding strength is maintained. , There is little risk of detachment.

しかも、押さえ金具２０が十分な耐変形性能を有する立体形状となっているので、押さえ金具２０が潰れるおそれは少なく、Ｄ型アイプレート１０の起立・倒伏に大きな力を必要とすることはなく、例えば運搬船への車輛搭載の作業性が悪くなることはない。   Moreover, since the presser fitting 20 has a three-dimensional shape with sufficient deformation resistance, there is little risk of the presser fitting 20 being crushed, and a large force is not required for standing and lying down of the D-type eye plate 10. For example, the workability of loading a vehicle on a transport ship does not deteriorate.

本発明に係るラッシングチェンの固縛金具の好ましい実施形態を模式的に示す概略斜視図である。It is a schematic perspective view which shows typically preferable embodiment of the securing metal fitting of the lashing chain which concerns on this invention. 上記実施形態を示す正面図である。It is a front view which shows the said embodiment. 上記実施形態を示す側面図である。It is a side view which shows the said embodiment. 上記実施形態における押さえ金具を示す図である。It is a figure which shows the pressing metal fitting in the said embodiment.

符号の説明Explanation of symbols

１０ Ｄ型アイプレート
１０Ａ 基部
２０ 押さえ金具
２１ 両端部
２２ 溶接開先
３０ 溶接ビード
３１ デッキ
10 D-type eye plate 10A Base 20 Presser bracket 21 Both ends 22 Weld groove 30 Weld bead 31 Deck

Claims (3)

幅方向中央が幅方向両側縁に比して盛り上がった断面形状を有する押さえ金具の幅方向両側縁が鋼板デッキに溶接によって固定され、該押さえ金具にはラッシングチェンのフックが係止されるＤ型アイプレートの基部が傾倒自在に係止されている一方、
上記押さえ金具は熱間鍛造組織を有する鋼材によって製作されていることを特徴とするラッシングチェンの固縛金具。 A D-type in which both side edges in the width direction of the presser fitting having a cross-sectional shape in which the center in the width direction rises compared to both side edges in the widthwise direction are fixed to the steel plate deck by welding, and a hook of a lashing chain is locked to the presser fitting While the base of the eye plate is tiltably locked,
A lashing chain securing metal fitting, wherein the pressing metal fitting is made of a steel material having a hot forged structure. 上記押さえ金具の長手方向の両端部は中央部分に比して厚肉に盛り上がり形成されている請求項１記載のラッシングチェンの固縛金具。   The lashing chain lashing metal fitting according to claim 1, wherein both end portions in the longitudinal direction of the presser fitting are formed to be thicker than the center portion. 上記押さえ金具が一般構造用圧延鋼材を用いて製作されている請求項１記載のラッシングチェンの固縛金具。
The lashing chain securing metal fitting according to claim 1, wherein the holding metal fitting is manufactured using a general structural rolled steel material.

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