DK178865B1

DK178865B1 - Welded construction

Info

Publication number: DK178865B1
Application number: DKPA200700880A
Authority: DK
Inventors: Toyoda Masanobu; Tetsuo Okada; Takahito Yokura; Yoshiyuki Nakajima; Noboru Kiji
Original assignee: Japan Marine United Corp
Priority date: 2006-06-23
Filing date: 2007-06-19
Publication date: 2017-04-10
Also published as: KR20130103459A; JP5075421B2; CN101096974B; DK200700880A; KR101316807B1; JP2008023594A; KR101408313B1; KR20070122149A; CN101096974A

Abstract

En svejst konstruktion omfatter en samlingsplade bestående af to metalplader, der er forbundet ved svejsning og en tilsluttet plade forbundet til samlingspladen ved svejsning. De to metalplader har en mellemliggende svejsesamlingsdel, der strækker sig i retning mod den tilsluttede plade hen til en del, der ligger tæt ved en tilsluttet position mellem samlingspladen og den tilsluttede plade. I en retning, hvori svejsesamlingsdelen strækker sig mod den tilsluttede plade, er svejsesamlingsdelen og den tilsluttede plade konfigureret til ikke at være i kontakt med hinanden, og mellem svejsesamlingsdelen og den tilsluttede plade forekommer ingen svejst del, der forbinder samlingspladen og den tilsluttede plade.A welded construction comprises a joint plate consisting of two metal plates joined by welding and a connected plate connected to the joint plate by welding. The two metal plates have an intermediate weld joint portion extending in the direction of the connected plate to a portion which is close to a connected position between the connecting plate and the connected plate. In a direction in which the weld joint portion extends toward the connected plate, the weld joint portion and the connected plate are configured not to be in contact with each other, and between the weld joint portion and the connected plate there is no welded portion connecting the joint plate and the connected plate.

Description

Opfindelsen vedrorer en svejst konstruktion, der kan sikre den strukturelle styrke i den svejste konstruktion, sasom et containerskib en bulkcarrier eller lignende, hvortil der er anvendt en svejseprocedure. Opfindelsen vedrorer navnlig en svejst konstruktion, som kan hindre skorhedsrevner i at udbrede sig yderligere i det tilfaelde, at en sadan skor-hedsrevne opstar i en svejsesamlingsdel i den svejste konstruktion.The invention relates to a welded structure which can ensure the structural strength of the welded structure, such as a container ship, a bulk carrier or the like, to which a welding procedure has been used. In particular, the invention relates to a welded structure which may prevent chipping cracks from spreading further in the event that such checkered cracks occur in a welded assembly portion of the welded construction.

Containerskibet, bulkcarrieren eller lignende svarer til en svejst konstruktion opbygget ved at forbinde et antal stêlplader ved svejsning. En beskrivelse af den svejste konstruktion gives nedenfor i forbindelse med et eksempel i form af et containerskib og under henvisning til de vedfojede tegninger. Bulkcarrieren er imidlertid naesten en identisk svejst konstruktion, skont tvaersnitsformen erforskellig fra containerskibet.The container ship, bulk carrier or the like corresponds to a welded structure constructed by joining a plurality of steel plates by welding. A description of the welded structure is given below in connection with an example in the form of a container ship and with reference to the accompanying drawings. However, the bulk carrier is almost an identical welded construction, although the cross-sectional shape is different from the container ship.

Figur 1A er et planbillede af et containerskib og figur 1B er et billede taget langs linie b-b i figur 1A. Dernaest er figur 2A et forstorret billede af et afgraenset omrêde vist med en pil A i figur 1B, og figur 2B er et billede set fra pilelinien b-b i figur 2A.Figure 1A is a plan view of a container ship and Figure 1B is an image taken along line b-b of Figure 1A. Next, Figure 2A is an enlarged view of a bounded area shown by an arrow A in Figure 1B, and Figure 2B is a view from the arrow line b-b of Figure 2A.

Som vist i figur 1A straekker en ovre daeksplade 4 sig fra staevn til haek og er svejset til en sideklaedningsplade 14 (eller en ovre gang i sideklaedningspladen) og en inder-skrogplade 16 (eller en ovre gang i inderskrogpladen). Den ovre daeksplade 4, sideklaedningspladen 14 og den indre skra plade 16 udgor et skibsskrog. Yderligere er der som vist i figur 1B en lugekarmplade 2 fastgjort ved svejsning til den ovre daeksplade 4. Lugekarmspladen 2 tjener til at 0ge styrken af skibsskroget og er en af de allermest betydningsfulde dele for styrke deraf. Hver ovre daeksplade 4, sideklaedningspladen 14, inderskrogpladen 16 og lugekarmspladen 2 er hver isaer fremstillet ved at sam-menfoje et antal stêlplader ved svejsning.As shown in Figure 1A, an upper cover plate 4 extends from the bow to the stern and is welded to a side cover plate 14 (or an upper passage in the side cover plate) and an inner hull plate 16 (or an upper passage in the inner hull plate). The upper cover plate 4, the side cover plate 14 and the inner scraper plate 16 constitute a ship's hull. Furthermore, as shown in Figure 1B, a hatch plate 2 is attached by welding to the upper deck plate 4. The hatch plate 2 serves to increase the strength of the ship hull and is one of the most important parts for its strength. Each upper cover plate 4, the side cover plate 14, the inner hull plate 16 and the hatch plate 2 are each manufactured in particular by joining together a plurality of steel plates by welding.

Containerskibet har, indvendigt deri, et stort lastrum 32, som vist i figur 1A og 1B, og har en stor abning 34 i en ovre del af lastrummet, og det er derfor ikke tilladt indvendigt i lastrummet at oprette et taet arrangement af dele til forstaerkning af skibsskrogets strukturelle styrke. Folgelig er det npdvendigt at sikre den strukturelle styrke af skibsskroget i containerskibet.The container ship has, within it, a large cargo compartment 32, as shown in Figures 1A and 1B, and has a large aperture 34 in an upper part of the cargo compartment, and therefore a tight arrangement of parts for reinforcement is not allowed inside the cargo compartment. of the structural hull of the hull. Consequently, it is necessary to ensure the structural strength of the ship's hull in the container ship.

Med henblik pa at sikre styrken af den svejste konstruktion sèsom skibsskroget eller lignende er det fundamentalt at sikre sejheden af svejsesamlingsdelen (f.eks. en svejsesamlingsdel 6 i figur 2B) i den svejste konstruktion. Imidlertid forekommer det, at nêr svejsningen udfpres som en svejsning med stort varme input, sasom ved elektro- svejsning eller lignende, er der tilbojelighed til, at sejheden af svejsesamlingsdelen nedsaettes pa grund af termisk virkning. Ydermere er der sêledes en vis sandsynlighed for, at der vil kunne forekomme fejl i svejsesamlingsdelen. Folgelig er det muligt, at der opstêr skorhedsrevner som folge af disse forhold. I det tilfaelde, hvor skorhedsrevnen opstêr i svejsesamlingsdelen, se f.eks. figur 2B, sê vil skorhedsrevnen i de fleste tilfaelde afbojes fra svejsesamlingsdelen 6 til siden af et stalbaseret materiale 2A i kraft af restspaending i svejsesamlingsdelen 6. Denne type af udbredelseshindrende funktion bliver opnêet i stêlplader, som har en tykkelse lig med eller mindre end 50 mm.In order to ensure the strength of the welded structure such as the ship hull or the like, it is fundamental to ensure the toughness of the weld joint portion (e.g., a weld joint portion 6 in Figure 2B) of the welded structure. However, when the weld is expressed as a weld with high heat input, such as by electro-welding or the like, there is a tendency for the toughness of the weld joint to be reduced due to thermal effect. Furthermore, there is thus a certain likelihood that faults may occur in the weld joint section. Consequently, it is possible that cracks of morbidity arise from these conditions. In the case where the chimney crack arises in the weld joint section, see e.g. Figure 2B, say, in most cases, the cracking crack is deflected from the weld joint portion 6 to the side of a steel-based material 2A by virtue of residual stress in the weld joint portion 6. This type of propagation-inhibiting function is obtained in steel plates having a thickness equal to or less than 50 mm. .

Imidlertid har det i en stêlplade, som har en tykkelse storre end ovennaevnte tykkelse, vist sig, at der er en vis sandsynlighed for, at skorhedsrevnen udbreder sig langs svejsesamlingsdelen uden at afbojes til basismaterialesiden. For eksempel i det efter-folgende ikke-patentdokument 1 er der vist et eksperimentelt eksempel pê, at en skor-hedsrevne lober lige langs med svejsesamlingsdelen uden at afbojes til basismaterialesiden i den med stor varme input svejste samlingsdel af en temmelig tyk hoj-styrkestêlplade ved en tykkelse pa 70 mm, hvorved udbredelsen deraf ikke stopper, og denne saerligt tykke hojstyrkestêlplade skiller ad.However, in a steel plate having a thickness greater than the above thickness, it has been found that there is a certain probability that the chipping crack propagates along the weld joint portion without deflecting to the base material side. For example, in the following non-patent document 1, an experimental example is shown that a chimney-tipped loop runs straight along the weld joint portion without deflecting to the base material side of the high heat input welded joint portion of a rather thick, high strength steel plate at a thickness of 70 mm, thereby preventing its propagation, and this particularly thick high strength steel plate separates.

Navnlig i de senere ar er tykkelsen af stêlplader anvendt i containerskibe oget i for-bindelse med ogning af storrelsen af containerskibe. Specielt har der vaeret bygget et fartoj i stor storrelse over 6000 TEU, og tykkelsen af den deri anvendte stêlplade er lig med eller storre end 50 mm. I containerskibe lig med eller storre end 8000 TEU-klassen vil tykkelsen af det anvendte stêlmateriale overstige 70 mm.In particular, in recent years, the thickness of steel plates used in container vessels has increased in connection with increasing the size of container vessels. In particular, a vessel of a size larger than 6000 TEU has been built, and the thickness of the steel plate used therein is equal to or greater than 50 mm. In container vessels equal to or greater than the 8000 TEU class, the thickness of the steel material used will exceed 70 mm.

Hvis tykkelsen af det anvendte stalmateriale bliver oget, vil der vaere oget mulighed for, at skorhedsrevner, som opstêr i svejsesamlingsdelen, udbreder sig uden at af-bojes til basismaterialesiden. Den foretrukne antagelse er, at skorhedsrevner udbreder sig til de andre dele pê en penetrerende méde over svejsesamlingsdelen uden at afbojes til basismateriale. Felgelig foretraekkes det, at skibet er forsynet med en funktion til at forhindre skorhedsrevnen i at udbrede sig, for der opstêr en situation, hvor den i svejsesamlingsdelen frembragte skorhedsrevne traenger igennem til en an-den del uden at afbojes til basismaterialet.If the thickness of the steel material used increases, there will also be the possibility that cracks in the weld joint portion propagate without deflecting to the base material side. The preferred assumption is that cracks of crack propagate to the other parts in a penetrating manner across the weld joint portion without deflecting to base material. As a matter of fact, it is preferred that the ship be provided with a function to prevent the cracks from spreading, since a situation arises in which the chokes of the weld joint penetrate to one another without deflecting to the base material.

Det f0lgende dokument viser to stivere eller forbindelsesplader, som er forbundet med hinanden via dragere eller profilbjaelker: State of Maryland Department of Transportation State Highway Administration Office of Structures: "Superstructure-Steel". Standard no. BR-SS(8.07)-78-73, "Stiffener attachment details for steel girders. Angle clip", "Stiffener attachment details with optional radius clips for steel girders. 2 sider, dateret 17. oktober 1978, senest revideret 22. oktober 2003.The following document lists two struts or connecting plates connected to each other via supports or profile beams: State of Maryland Department of Transportation State Highway Administration Office of Structures: "Superstructure-Steel". Default no. BR-SS (8.07) -78-73, "Stiffener attachment details for steel girders. Angle clip", "Stiffener attachment details with optional radius clips for steel girders. 2 pages, dated October 17, 1978, last revised October 22, 2003 .

Det udbredelseshindrende organ til skorhedsrevner, der er naevnt ovenfor, er f.eks. beskrevet i patentdokumenterne 1 til 4.The anti-proliferation device for cracks mentioned above is e.g. disclosed in patent documents 1 to 4.

Patentdokumentet 1 beskriver anvendelsen af stal med finkornet overflade, som har gode anti-skorhedsrevneegenskaber som en forstaerkningsdel tilvejebragt til at over-skaere svejsesamlingsdelen.The patent document 1 describes the use of fine-grained steel which has good anti-abrasion cracking properties as a reinforcing member provided to cut the weld joint member.

Patentdokumentet 2 beskriver anvendelsen af svejsning til helt at traenge ind i et afsnit svarende til eller storre end 70% af tykkelsen fra en forreste overflade eller en bager-ste overflade af forstaerkningsdelen ved en bredde lig med eller storre end sem-bredden af svejsesamlingsdelen i det omrêde, hvori svejsesamlingsdelen og forstaerkningsdelen moder hinanden, samt brugen af stêlet med finkornet overflade og anti-skorhedsrevneegenskab som forstaerkningsdel lagt sêledes, at den skaerer svejsesamlingsdelen.The patent document 2 describes the use of welding to completely penetrate into a section equal to or greater than 70% of the thickness of a front surface or rear surface of the reinforcing member at a width equal to or greater than the sem width of the weld joint portion thereof. area in which the weld joint member and the reinforcement member are mutually reinforced, as well as the use of the fine-grained steel and anti-abrasion cracking property as the reinforcement member are sealed so as to cut the weld joint member.

Patentdokumentet 3 beskriver en konstruktion, som udhuler en lodret del og et svejse-metal i et omrade, hvori det er meningen, af en skorhedsrevne i den lodrette del bliver stoppet, og som indforer en bremsedel med en specifik tykkelse og laengde til stedet.The patent document 3 describes a construction which erupts a vertical part and a weld metal in an area in which it is intended to be stopped by a chisel-torn in the vertical part and which introduces a brake part of a specific thickness and length to the place.

Patentdokumentet 4 beskriver en konstruktion, som fjerner noget af en svejsesam-lingsdel i et omrade, hvori skorhedsrevnen forventes at blive stoppet, derefter udfores reparationssvejsning ρέ delen gennem brug af et svejsemateriale, der har en god rev-nesejhed, og saetter vinklen af en ydre kantretning pê den reparerede og svejste del til mellem 10° og 60° i forhold til laengderetningen af svejsesamlingsdelen.The patent document 4 describes a construction which removes some of a weld joint part in an area in which the cracks of crack are expected to be stopped, then repair weld ρέ part is performed using a weld material having good crack toughness and sets the angle of an outer edge direction of the repaired and welded part to between 10 ° and 60 ° relative to the longitudinal direction of the weld joint part.

Patentdokument 1: Japansk offentliggorelsesskrift nr. 2004-232052 "Weld Structure Having Excellent Brittle Fracture Resistance".Patent Document 1: Japanese Patent Publication No. 2004-232052 "Weld Structure Having Excellent Brittle Fracture Resistance".

Patentdokument 2: Japansk offentliggerelsesskrift nr. 2005-111501 "Weld Structure Having Excellent Brittle Fracture Propagation Resistance".Patent Document 2: Japanese Patent Publication No. 2005-111501 "Weld Structure Having Excellent Brittle Fracture Propagation Resistance".

Patentdokument 3: Japansk offentliggorelsesskrift nr. 2005-319516 "Welding Method of Weld Structure, and Weld Structure Having Excellent Brittleness Crack Propagation Resistance".Patent Document 3: Japanese Patent Publication No. 2005-319516 "Welding Method of Weld Structure, and Weld Structure Having Excellent Brittleness Crack Propagation Resistance".

Patentdokument 4: Japansk offentliggorelsesskrift nr.2005-131708 "Weld Structure Having Excellent Brittleness Crack Propagation Resistance and Welding Method Thereof".Patent Document 4: Japanese Patent Publication No. 2005-131708 "Weld Structure Having Excellent Brittleness Crack Propagation Resistance and Welding Method Thereof".

Ikke-patentdokument 1: "Development of Ultra-large Container Ship - Practical Use of New High Strength Local Thick Steel Plate", Japan Ship and Marine Engineers Institute Memoir nr. 3, side 73 og 74 (10. november 2005).Non-Patent Document 1: "Development of Ultra-Large Container Ship - Practical Use of New High Strength Local Thick Steel Plate", Japan Ship and Marine Engineers Institute Memoir No. 3, pages 73 and 74 (November 10, 2005).

Imidlertid er det i forbindelse med patentdokumenterne 1 og 2 nodvendigt at skabe en saerlig finkornet staloverflade. Ydermere er det i forbindelse med patentdokument 3 nedvendigt at anvende bremsematerialet, som har bremseegenskab og en hej pris. Ydermere er det i forbindelse med patentdokument 4 nedvendigt at udfere et fint ar-bejde til at bearbejde den reparerede og svejste del til en specifik form, i tillaeg til ar-bejdet med at udhule den specifikke del.However, in connection with patent documents 1 and 2, it is necessary to create a special fine-grained steel surface. Furthermore, in connection with patent document 3, it is necessary to use the brake material, which has braking properties and a high price. In addition, in connection with patent document 4, it is necessary to perform a fine work to work the repaired and welded part into a specific shape, in addition to the work of hollowing out the specific part.

Felgelig er det et formal med opfindelsen at tilvejebringe en svejst konstruktion, hvori udbredelsen af en skorhedsrevne kan stoppes ved hjaelp af midler, der er forskellig fra de i patentdokumenterne 1 til 4 anvendte, hvori den svejste konstruktion er konfigure-ret sSledes, at udbredelsen af skerhedsrevnen bliver stoppet af et simpelt tiltag uden brug af kostbart bremsemateriale indeholdende store maengder legeringer, endog i det tilfaelde hvor der optraeder en skerhedsrevne. Ifelge et ferste aspekt af opfindelsen (ferste opfindelse) er der tilvejebragt en svejst konstruktion pa basis af felgende an-tagelse. Navnlig i tilfaelde af svejsning af en samlingsplade (f.eks. lugekarmspladen 2 i figur 2B) samt en svejsesamlingsdel til en tilsluttet plade (f.eks. den evre daeksplade 4 i figur 2B), og hvis en svejsesamlingsdel (f.eks. svejsesamlingsdelen 6 i figur 2B) af samlingspladen er i kontakt med den svejste del mellem samlingspladen og den tilslut-tede plade, er der mulighed for, at en skerhedsrevne, der er opstSet og udbreder sig i svejsesamlingsdelen, kan brede sig ind i den tilsluttede plade gennem den svejste del mellem samlingspladen og den tilsluttede plade. Dette skyldes, at der er mulighed for, at sejheden nedsaettes i den svejste del mellem samlingspladen og den tilsluttede pla-de i kraft af varme input pé et tidspunkt i lobet af svejsningen, og den svejste del dan-ner en udbredelsesbane. Ved at rette opmaerksomheden mod dette punkt opnar den foreliggende opfindelse sSledes at forhindre en skorhedsrevne i at udbrede sig langs svejsesamlingsdelen af samlingspladen, i et graenseomrade mellem samlingspladen og den tilsluttede plade.Accordingly, it is an object of the invention to provide a welded structure in which the propagation of a tear can be stopped by means different from those used in the patent documents 1 to 4, wherein the welded structure is configured so that the propagation of the shear crack is stopped by a simple action without the use of costly brake material containing large amounts of alloys, even in the case where a shear crack occurs. According to a first aspect of the invention (first invention), a welded structure has been provided on the basis of the following assumption. In particular, in the case of welding a joint plate (e.g., hatch plate 2 in Figure 2B) and a welding joint part to a connected plate (e.g. the outer cover plate 4 in Figure 2B), and if a welding joint part (e.g. the welding joint part 6 in Figure 2B) of the joint plate is in contact with the welded part between the joint plate and the connected plate, there is a possibility that a shear tear which is set up and propagates in the weld joint part can extend into the connected plate through the welded part between the joint plate and the connected plate. This is because it is possible for the toughness to be reduced in the welded part between the joint plate and the connected plate by virtue of heat input at some point during the welding, and the welded part forms a propagation path. By drawing attention to this point, the present invention thus seeks to prevent a tear-rupture from propagating along the weld joint portion of the joint plate, in an interface between the joint plate and the connected plate.

Med andre ord er der til opnaelse af fornaevnte formal ifolge det forste aspekt af den foreliggende opfindelse tilvejebragt en svejst konstruktion omfattende: en samlingsplade bestaende af to metalplader, der erforbundet ved svejsning; og en tilsluttet plade forbundet til samlingspladen ved svejsning, hvorved de to metalplader har en mellemliggende svejsesamlingsdel, der straekker sig i retning mod den tilsluttede plade hen til en del, der ligger taet ved en tilsluttet position mellem samlingspladen og den tilsluttede plade, hvorved svejsesamlingsdelen og den tilsluttede plade i en retning, hvori svejsesamlingsdelen straekker sig mod den tilsluttede plade, er konfi-gureret til ikke at vaere i kontakt med hinanden, og mellem svejsesamlingsdelen og den tilsluttede plade forekommer ingen svejst del, der forbinder samlingspladen og den tilsluttede plade. I ovennaevnte konstruktion findes der ingen skorhedsrevne-udbredelsesbane sasom den svejste del eller lignende, mellem svejsesamlingsdelen og den tilsluttede plade i den retning, hvori svejsesamlingsdelen straekker sig mod den tilsluttede plade. Folge-lig kan udbredelsen af skorhedsrevnen blive stoppet i graenselaget mellem svejsesamlingsdelen og den tilsluttede plade.In other words, for the purpose of the aforementioned formula, according to the first aspect of the present invention, there is provided a welded structure comprising: a joint plate consisting of two metal sheets joined by welding; and a connected plate connected to the joint plate by welding, wherein the two metal plates have an intermediate weld joint portion extending in the direction of the connected plate to a portion close at a connected position between the joint plate and the connected plate, whereby the welding joint portion and the connected plate in a direction in which the weld joint portion extends toward the connected plate is configured not to be in contact with each other, and between the weld joint portion and the connected plate there is no welded portion connecting the joint plate and the connected plate. In the above construction, there is no chamfered propagation path such as the welded portion or the like, between the weld joint portion and the connected plate in the direction in which the weld joint portion extends toward the connected plate. Accordingly, the propagation of the chimney crack may be stopped in the boundary layer between the weld joint member and the connected plate.

Ydermere kan ovennaevnte konstruktion, hvori svejsesamlingsdelen og den tilsluttede plade ikke stêr i kontakt med hinanden i den retning, hvori svejsesamlingsdelen straekker sig mod den tilsluttede plade, og mellem svejsesamlingsdelen og den tilsluttede plade findes der ingen svejst del, som samler samlingspladen og den tilsluttede plade, kan let opnês uden behov for noget saerligt hejstyrkebremsestêlmateriale. Sèledes er det ifolge opfindelsen muligt at hindre en skorhedsrevne i udbredelse gen-nem et simpelt tiltag uden at anvende noget kostbart bremsemateriale og selv i et til-faelde, hvor der optraeder skorhedsrevne.Furthermore, the above-mentioned construction in which the welding joint part and the connected plate cannot interfere with each other in the direction in which the welding joint part extends towards the connected plate, and between the welding joint part and the connected plate there is no welded part which joins the joint plate and the connected plate. , can be easily obtained without the need for any special high-strength brake steel material. Thus, according to the invention, it is possible to prevent a tear-rupture in propagation by a simple operation without using any expensive brake material and even in a case where rupture-tearing occurs.

Ydermere er der ifolge et andet aspekt ved opfindelsen (anden opfindelse) tilvejebragt en svejst konstruktion pa basis af folgende antagelse. I den svejste konstruktion inklu-derende to metalplader (f.eks. to lugekarmsplader 2A i figur 2B) og den mellem-liggende svejsesamlingsdel antages det, at en skorhedsrevne udbreder sig langs svejsesamlingsdelen i svejseretningen. Gennem at rette opmaerksomheden mod dette punkt kan der ifolge det andet aspekt ved opfindelsen fjernes en udbredelsesbane for en skorhedsrevne gennem at indfore et hul, der gennemtraenger svejsemetallet, og en del, hvor sejheden er nedsat som folge af varmeinputtet pê svejsetidspunktet.Furthermore, according to another aspect of the invention (second invention), a welded structure is provided on the basis of the following assumption. In the welded structure, including two metal sheets (e.g., two hatch frame plates 2A in Figure 2B) and the intermediate weld joint portion, it is assumed that a ruptured crack propagates along the weld joint portion in the weld direction. By directing attention to this point, according to the second aspect of the invention, a propagation path for a sanitary tear can be removed by introducing a hole penetrating the weld metal and a portion where the toughness is reduced as a result of the heat input at the welding time.

Med andre ord er der med henblik pa at ορηέ det ovenfor beskrevne formêl og ifolge det andet aspekt ved opfindelsen tilvejebragt en svejst konstruktion omfattende en samlingsplade bestaende af to metalplader, der er forbundet ved svejsning, hvorved samlingspladen har en svejsesamlingsdel, der straekker sig mellem de to metalplader, og et hul er udformet til at gennemtraenge svejsesamlingsdelen i samlingspladens tyk-kelsesretning, sa svejsesamlingsdelen bliver opdelt. I den ovennaevnte konstruktion vil der, fordi hullet, der gennemtraenger svejsesamlingsdelen, er tilvejebragt saledes, at svejsesamlingsdelen, der straekker sig mellem to metalplader, er delt ved en mellemposition i svejsesamlingsdelen, ikke eksistere no-gen skorhedsrevne-udbredelsesbane mellem svejsesamlingsdelene, der er opdelt af hullet. Folgelig er det muligt at stoppe enhver skorhedsrevne mod udbredelse ved en position mellem de delte svejsesamlingsdele.In other words, for the purpose of the above-described formula and according to the second aspect of the invention, a welded structure is provided comprising a joint plate consisting of two metal plates joined by welding, the joint plate having a welding joint portion extending between the two metal plates, and a hole is designed to penetrate the weld joint portion in the thickness direction of the joint plate so that the weld joint portion is divided. In the above construction, because the hole penetrating the weld joint portion is provided so that the weld joint portion extending between two metal sheets is divided at an intermediate position in the weld joint portion, no chimney-tearing propagation path exists between the weld joint members. of the hole. Accordingly, it is possible to stop any chamois against propagation at a position between the split weld joint members.

Ydermere er det muligt let at skabe hullet, der deler svejsesamlingsdelen, uden behov for kostbart bremsestalmateriale af hoj styrke.Furthermore, it is possible to easily create the hole dividing the weld joint part, without the need for expensive high strength brake steel material.

Som beskrevet ovenfor og ifolge opfindelsen er det muligt at stoppe udbredelsen af en skorhedsrevne pa basis af et simpelt tiltag uden at bruge kostbart bremsemateriale, ogsê selv om der optraeder en skorhedsrevne.As described above and in accordance with the invention, it is possible to stop the propagation of a tear on the basis of a simple action without using expensive brake material, even if a tear is occurring.

Ydermere og fordi udbredelsen af skorhedsrevnen bliver stoppet gennem at tilveje-bringe hullet, der deler svejsesamlingsdelen, er det muligt at gore brug af den svejste konstruktion, som allerede er blevet fremstillet. For eksempel kan den fremstillede svejste konstruktion blive forsynet med den skorhedsrevne-udbredelseshindrende funktion gennem at indrette hullet, der gennemtraenger svejsesamlingsdelen, mellem to metalplader inkluderet i den fremstillede svejste konstruktion.Furthermore, and because the propagation of the chipping crack is stopped by providing the hole dividing the weld joint portion, it is possible to make use of the welded construction which has already been manufactured. For example, the fabricated welded structure may be provided with the abrasion-resistant propagation barrier function by aligning the hole penetrating the weld joint member between two metal sheets included in the fabricated welded structure.

Ifelge en foretrukken udforelsesform for det forste aspekt ved opfindelsen er et gen-nemtraengende hul i samlingspladens tykkelsesretning udformet i samlingspladen, sa det befinder sig mellem svejsesamlingsdelen og den tilsluttede plade, og ligger ved en position taet ved den tilsluttede position og derved tillader svejsesamlingsdelen og den tilsluttede plade at vaere uden kontakt med hinanden, og tillader ogsa, at der mellem svejsesamlingsdelen og den tilsluttede plade ikke forekommer en svejst del, der for-binder samlingspladen og den tilsluttede plade.According to a preferred embodiment of the first aspect of the invention, a self-tapping hole in the thickness direction of the joint plate is formed in the joint plate so that it is between the weld joint part and the connected plate, and lies at a position close to the connected position and thereby allows the weld joint part and the connected plate to be out of contact with each other, and also permits that between the weld joint portion and the connected plate there is no welded portion connecting the joint plate and the connected plate.

Folgelig er det muligt at udfore en konstruktion sêledes, at en skorhedsrevne-ud-bredelsesbane, sêsom den svejste del eller lignende, ikke optraeder mellem svejsesamlingsdelen og den tilsluttede plade i den retning, hvori svejsesamlingsdelen straek-ker sig mod den tilsluttede plade. Folgelig er det muligt at stoppe en skorhedsrevne mod udbredelse pê basis af et simpelt tiltag uden brug af kostbart bremsemateriale.Accordingly, it is possible to carry out a construction so that a chamfered propagation path, such as the welded portion or the like, does not occur between the weld joint portion and the connected plate in the direction in which the weld joint portion extends toward the connected plate. Consequently, it is possible to stop a chatter against propagation on the basis of a simple measure without the use of expensive brake material.

Der kan vaere tilvejebragt en daekningsdel til at lukke en êbning til hullet, og daek-ningsdelen kan vaere sluttet til mindst den ene af samlingsdelen og den tilsluttede del ved hjaelp af kantsomsvejsning.A cover portion may be provided to close an opening to the hole, and the cover portion may be connected to at least one of the connector portion and the connected portion by edge welding.

Som beskrevet ovenfor er det muligt at gore sammenfojningspladen vandtaet gennem at lukke hullet ved hjaelp af daekningsdelen. Yderligere og fordi kantsomsvejsning har en kort benlaengde, sa udover kantsomsvejsning kun ringe indflydelse pa udbredelsen skorhedsrevnen. Derfor er det, selvom daekningsdelen er fastgjort ved hjaelp af kantsomsvejsning, muligt at stoppe en skorhedsrevne mod udbredelse.As described above, it is possible to make the joint plate waterproof by closing the hole by means of the cover member. Further, and because edge welding has a short leg length, in addition to edge welding, there is only a small impact on the spread of the crack. Therefore, even if the cover part is fixed by means of edge welding, it is possible to stop a tear-off against propagation.

Ifolge en anden udforelsesform for opfindelsen og ved et forste aspekt af opfindelsen er en kontakthindrende del anbragt mellem svejsesamlingsdelen og den tilsluttede del ved en position taet ved den tilsluttede position, og tillader derved svejsesamlingsdelen og den tilsluttede plade at vaere uden kontakt med hinanden, og tillader ogsa at der mellem svejsesamlingsdelen og den tilsluttede plade ikke forekommer en svejst del, derforbinder samlingspladen og den tilsluttede plade.According to another embodiment of the invention, and in a first aspect of the invention, a contact obstructing member is disposed between the weld joint member and the connected member at a position close to the connected position, thereby allowing the welding joint member and the connected plate to be in contact with each other, allowing also that between the weld joint part and the connected plate there is no welded part, therefore the joint plate and the connected plate bind.

Folgelig findes der ikke en skorhedsrevne-udbredelsesbane sèsom den svejste del eller lignende, mellem svejsesamlingsdelen og den tilsluttede plade i den retning, hvori svejsesamlingsdelen straekker sig mod den tilsluttede plade. Folgelig er det muligt at stoppe skorhedsrevnen mod udbredelse gennem et simpelt tiltag uden brug af det kostbare bremsemateriale.Accordingly, there is no rupture-crack propagation path such as the welded portion or the like, between the weld joint portion and the connected plate in the direction in which the weld joint portion extends toward the connected plate. Consequently, it is possible to stop the cracks in the crack against propagation through a simple operation without the use of the expensive brake material.

Ifolge den ovenfor beskrevne opfindelse er det muligt at stoppe en skorhedsrevne mod udbredelse pa basis af et simpelt tiltag uden brug af det kostbare bremsemateriale, selv i det tilfaelde hvor der opstar en skorhedsrevne.According to the invention described above, it is possible to stop a tear-crack against propagation on the basis of a simple action without the use of the expensive brake material, even in the event of a tear-crack.

Andre formSI, traek og fordele ved opfindelsen vil fremga af den efterfolgende be-skrivelse under henvisning til de vedfojede tegninger, hvor:Other features, features and advantages of the invention will become apparent from the following description with reference to the accompanying drawings, in which:

Figur 1A er et planbillede af et containerskib,Figure 1A is a plan view of a container ship,

Figur 1B er et billede set i pilretningen ved linien b-b i figur 1 A,Figure 1B is a view in the arrow direction along line b-b of Figure 1A,

Figur 2A er et forstorret billede af et omrade angivet med en pil A i figur 1B,Figure 2A is an enlarged view of an area indicated by an arrow A in Figure 1B.

Figur 2B er et billede set i pileretningen ved linien b-b i figur 2A,Figure 2B is a view in the arrow direction along line b-b of Figure 2A,

Figur 3A er et skematisk billede, der viser en svejst konstruktion ifelge en forste udfe-relsesform for opfindelsen, og den svarer til et forstorret billede af det med pilen A viste omrêde i figur 1B,Figure 3A is a schematic view showing a welded construction according to a first embodiment of the invention, and it corresponds to an enlarged view of the area shown by arrow A in Figure 1B,

Figur 3B er et billede set i pilens retning ved linien b-b i figur 3A,Figure 3B is a view in the direction of the arrow at line b-b of Figure 3A,

Figur 3C er et forstorret billede af et omrade markeret af en pil C i figur 3B,Figure 3C is an enlarged view of an area marked by an arrow C in Figure 3B,

Figur 4A er et billede, der viser svejsning i den svejste konstruktion ifolge den forste udforelsesform og svarende til figur 3C,Figure 4A is a view showing welding in the welded construction according to the first embodiment and corresponding to Figure 3C,

Figur 4B er et billede set i pilens retning langs linien b-b i figur 4A,Figure 4B is a view in the direction of the arrow along line b-b of Figure 4A,

Figur 4C er et billede set i pilens retning langs linien c-c i figur 4A,Figure 4C is a view in the direction of the arrow along line c-c of Figure 4A,

Figur 4D er et billede set i pilens retning langs linien b-b i figur 4A og viser den anden svejsemetode,Figure 4D is a view in the direction of the arrow along line b-b of Figure 4A showing the second welding method;

Figur 5A er et delbillede, der viser en situation, hvor der er tilvejebragt en daeknings-plade til lukning af et hul i konstruktionen i figur 3C,Figure 5A is a partial view showing a situation where a cover plate is provided for closing a hole in the structure of Figure 3C.

Figur 5B er et billede set i pilens retning langs linien b-b i figur 5A,Figure 5B is a view in the direction of the arrow along line b-b of Figure 5A,

Figur 5C er et billede set i pilens retning langs linien c-c i figur 5B,Figure 5C is a view in the direction of the arrow along line c-c of Figure 5B,

Figur 6A er et forklarende delbillede, der viser en svejst konstruktion ifolge en anden udforelsesform for opfindelsen,Figure 6A is an explanatory sectional view showing a welded construction according to another embodiment of the invention,

Figur 6B er et billede set i pilens retning langs linien b-b i figur 6A,Figure 6B is a view in the direction of the arrow along line b-b of Figure 6A,

Figur 6C er et billede set i pilens retning langs linien b-b i figur 6A og viser den anden svejsemetode,Figure 6C is a view in the direction of the arrow along line b-b of Figure 6A showing the second welding method;

Figur 7 er et forstorret billede af et omrade indtegnet med den stiplede linie A i figur 6A, og viser en situation, hvor en nedtrykningdel er tilvejebragt i en kontakthindrende del,Figure 7 is an enlarged view of an area plotted with the dotted line A of Figure 6A, showing a situation where a depression portion is provided in a contact obstructing portion;

Figur 8 et delbillede, delvis i tvaersnit, der viser et tilfaelde, hvor der ikke er tilvejebragt en nedtrykningsdel i den kontakthindrende del bestêende af et blodt stél,Figure 8 is a partial cross-sectional view showing a case where a depression portion is not provided in the contact-obstructing portion of a blood frame;

Figur 9A er et delbillede, der viser en svejst konstruktion ifolge en tredje udforelses-form for opfindelsen og som svarer til billedet set i pilen retning langs linien b-b i figur 3A, ogFigure 9A is a partial view showing a welded construction according to a third embodiment of the invention and corresponding to the image seen in the arrow direction along line b-b of Figure 3A, and

Figur 9B er et forstorret billede af et omrade markeret med pilen B i figur 9A.Figure 9B is an enlarged view of an area marked by arrow B in Figure 9A.

Der folger nu beskrivelse af foretrukne udforelsesformer for opfindelsen under hen-visning til de vedfojede tegninger. Her benyttes samme referencenumre for ens dele i hver af tegningerne, og en overlappende beskrivelse vil blive udeladt. (Forste udforelsesform)DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION Referring now to the accompanying drawings. Here, the same reference numbers for identical parts are used in each of the drawings, and an overlapping description will be omitted. (First embodiment)

Figur 3A er et forstorret billede af et omrade markeret med en pil A i figur 1B og viser en situation, hvor en svejst konstruktion ifolge en forste udforelsesform (svarende til den forste opfindelse) for opfindelsen er anvendt pê en lugekarm og et ovre daek af et containerskib.Figure 3A is an enlarged view of an area marked by an arrow A in Figure 1B, showing a situation in which a welded construction according to a first embodiment (corresponding to the first invention) of the invention is applied to a hatch frame and an upper cover of a container ship.

Som vist i figur 3A er den svejste konstruktion ifolge den forste udforelsesform en konstruktion fremstillet ved at foje en lugekarmsplade 2 til en ovre daeksplade 4 ved svejsning.As shown in Figure 3A, the welded construction according to the first embodiment is a construction made by joining a hatch frame plate 2 to an upper cover plate 4 by welding.

Figur 3B er et billede set i pilens retning ved linien b-b i figur 3A. Som vist i figur 3B er lugekarmspladen 2 fremstillet ved at anbringe endefladerne af to eller fiere metal-plader 2a (stêlplader i denne udforelsesform) ind mod hinanden sê de kan samles ved svejsning. I dette tilfaelde bliver en forstaerkningsdel 8, der straekker sig vinkelret pê en svejsesamlingsdel 6, forbundet til en sideflade pê lugekarmspladen 2 ved kantsom-svejsning. Ydermere er en i vandret retning anbragt topplade 12 fojet til en ovre ende af lugekarmspladen 2 ved svejsning.Figure 3B is a view in the direction of the arrow at line b-b of Figure 3A. As shown in Figure 3B, the hatch frame plate 2 is made by affixing the end faces of two or four metal plates 2a (steel plates in this embodiment) to each other, which can be joined by welding. In this case, a reinforcing member 8 extending perpendicular to a weld joint member 6 is connected to a side face of the hatch plate 2 by edge welding. In addition, a top plate 12 arranged in a horizontal direction is joined to an upper end of the hatch plate 2 by welding.

Den ovre daeksplade 4 er sluttet til ovre endedele af en sideklaedningsplade 14 og en inderskrogsplade 16, som vist i figur 3A. En nedre endedel af lugekarmspladen 2 er sluttet til den ovre daeksplade 4 ved svejsning.The upper cover plate 4 is connected to the upper end portions of a side cover plate 14 and an inner hull plate 16, as shown in Figure 3A. A lower end portion of the hatch plate 2 is connected to the upper cover plate 4 by welding.

Svejsesamlingsdelen 6 i lugekarmspladen 2 straekker sig i retning mod den ovre daeksplade 4 hen til en del taet ved en tilsluttet position mellem lugekarmspladen 2 og den ovre daeksplade 4 mod den ovre daeksplade 4.The weld joint portion 6 of the hatch plate 2 extends in the direction towards the upper cover plate 4 to a portion tightly at a connected position between the hatch plate 2 and the upper cover plate 4 towards the upper cover plate 4.

Figur 3C er et forstorret billede af et omrêde markeret med en pil C i figur 3B. Som vist i figur 3C er der ifolge den forste udforelsesform tilvejebragt et hul 18 svarende til et gennemgêende mellemrum i en tykkelsesretning, udformet naer tilslutningspositionen mellem lugekarmspladen 2 og den ovre daeksplade 4 for pê denne méde at forhindre svejsesamlingsdelen 6 i at blive bragt i kontakt med den ovre daeksplade 4.Figure 3C is an enlarged view of an area marked by an arrow C in Figure 3B. As shown in Figure 3C, according to the first embodiment, a hole 18, corresponding to a through space in a thickness direction, is provided when the connection position between the hatch plate 2 and the upper cover plate 4 is thereby prevented from being contacted with the weld joint member 6. the upper cover plate 4.

Som naevnt ovenfor er den svejste konstruktion ifolge den forste udforelsesform fremstillet sêledes, at svejsesamlingsdelen 6 ikke er bragt i kontakt med den ovre daeksplade 4 i den retning, hvori svejsesamlingsdelen 6 peger mod den ovre daeksplade 4, og den svejste del, der sammenfojer lugekarmspladen 2 og den ovre daeksplade 4, findes ikke mellem svejsesamlingsdelen 6 og den ovre daeksplade 4 som folge af hullet 18 i lugekarmspladen 2. Med andre ord findes der ikke en skorhedsrevne-udbredel- sesbane, sasom den svejste del eller lignende, mellem svejsesamlingsdelen 6 og den evre daeksplade 4 som fplge af hullet 18 i lugekarmspladen 2.As mentioned above, the welded construction according to the first embodiment is manufactured so that the weld joint portion 6 is not contacted with the upper cover plate 4 in the direction in which the weld joint portion 6 points to the upper cover plate 4 and the welded portion joining the hatch plate 2 and the upper cover plate 4, does not exist between the weld joint portion 6 and the upper cover plate 4 as a result of the hole 18 in the hatch plate 2. In other words, there is no chimney-tearing propagation path, such as the welded portion or the like, between the weld joint portion 6 and the each cover plate 4 as a result of the hole 18 in the hatch frame plate 2.

Folgelig er det muligt at stoppe skorhedsrevnen i at brede sig i svejsesamlingsdelen 6 i et graenselag mellem svejsesamlingsdelen 6 og den ovre daeksplade 4. If0lge op-findelsen er den svejste del i denne situation et begreb daekkende et svejsemetal og et omrêde, hvori sejheden er saenket pa grund af termisk pavirkning pa svejsetids-punktet.Accordingly, it is possible to stop the chipping crack from spreading in the weld joint portion 6 in a boundary layer between the weld joint member 6 and the upper cover plate 4. According to the invention, the welded member in this situation is a term comprising a weld metal and a region in which the toughness is lowered. due to thermal effect at the welding time point.

Figur 4A til 4D er billeder, der viser svejsningen mellem lugekarmspladen 2 og den 0vre daeksplade 4. I dette tilfaelde er der i figur 4A til 4D udeladt en svejsesamlingsdel 7, som naevnes nedenfor. Figur 4A er magen til figur 3C, figur 4B er et billede set i pilens retning lang en linien b-b i figur 4A, og figur 4C er et billede set i pilens retning lang en linie c-c i figur 4A. Som vist i figur 4B er lugekarmspladen 2 og den 0vre daeksplade 4 fojet sammen ved hjaelp af en kantsomsvejst del 22 i pilens A retning i et om-rêde, hvori hullet 18 ikke forekommer. Pê den anden side, som vist i figur C, er lugekarmspladen 2 og den 0vre daeksplade 4 ikke svejst i pilens A retning i et omrêde, hvori hullet 18 optraeder. I dette tilfaelde kan en svejst del 24, i stedet for svejsningen i figur 4B, straekke sig til indre dele af lugekarmen 2 og den ovre daeksplade 4 i pilens A retning i et omrêde, hvori hullet 18 ikke optraeder, og som er vist i figur 4D. I det tilfaelde, hvor lugekarmspladen 2 er vandtaet, kan en daekningsplade, der lukker hullet 18, blive fastgjort til lugekarmspladen 2.Figures 4A to 4D are images showing the weld between the hatch plate 2 and the upper cover plate 4. In this case, in Figures 4A to 4D, a weld joint portion 7, mentioned below, is omitted. Figure 4A is similar to Figure 3C, Figure 4B is an image seen in the direction of the arrow along a line b-b in Figure 4A, and Figure 4C is an image seen in the direction of the arrow along a line c-c in Figure 4A. As shown in Figure 4B, the hatch frame plate 2 and the upper cover plate 4 are joined together by means of an edge-welded portion 22 in the direction of arrow A in a region in which the hole 18 does not occur. On the other hand, as shown in Figure C, the hatch plate 2 and the upper cover plate 4 are not welded in the direction of arrow A in an area in which the hole 18 occurs. In this case, instead of the weld in Figure 4B, a welded portion 24 may extend to inner portions of the hatch frame 2 and the upper cover plate 4 in the direction of arrow A in an area in which the hole 18 does not appear and shown in FIG. 4D. In the case where the hatch plate 2 is watertight, a cover plate closing the hole 18 may be attached to the hatch plate 2.

Figur 5A viser et tilfaelde, hvor en daekningsplade 26 er fastgjort til konstruktionen i figur 3C. Figur 5B er et billede set i pilens retning langs linien b-b i figur 5A. Som vist i figur 5B er daekningspladen 26 sluttet til den ene sideflade af lugekarmspladen 2. F0I-gelig vil hullet 18, der er udformet i den forreste ende af svejsesamlingsdelen 6, vaere lukket. I dette tilfaelde svarer daekningspladen 26 til en daekningsdel, der lukker hullet 18. Det er unodvendigt, at daekningsdelen udformes med en plan pladeform.Figure 5A shows a case where a cover plate 26 is attached to the structure of Figure 3C. Figure 5B is a view in the direction of the arrow along line b-b of Figure 5A. As shown in Figure 5B, the cover plate 26 is connected to one side surface of the hatch plate 2. Accordingly, the hole 18 formed at the front end of the weld joint portion 6 will be closed. In this case, the cover plate 26 corresponds to a cover portion closing the hole 18. It is unnecessary for the cover portion to be formed with a flat plate shape.

Figur 5C er et billede set ind mod linien c-c i figur 5B. Som vist i figur 5A til 5C er daekningspladen 26 og lugekarmspladen 2 blevet sammenfojet ved kantsomsvejsning 22. Ydermere er daekningspladen 26 ogsa fpjet til den pvre daeksplade 4 ved kantspms-vejsning. I dette tilfaelde er kantsomsvejsningsdelen 22, som vises i figur 5A, udeladt i figur 5B og 5C, og den kantsomsvejste del 22 i figur 5B er udeladt i figurerne 5A og 5C, og den kantspmsvejste del 22 vist i figur 5C er udeladt i figurerne 5A og 5B.Figure 5C is a view towards line c-c of Figure 5B. As shown in Figures 5A to 5C, the cover plate 26 and the hatch plate 2 have been joined together by edge welding 22. In addition, the cover plate 26 is also joined to the upper cover plate 4 by edge spinning welding. In this case, the edge weld portion 22 shown in Figure 5A is omitted in Figures 5B and 5C and the edge welded portion 22 of Figure 5B is omitted in Figures 5A and 5C and the edge spun weld portion 22 shown in Figure 5C is omitted in Figures 5A. and 5B.

Fordi kants0msvejsningen har en kort benlaengde, har kantsomsvejsningen ringe ind-flydelse ρέ udbredelsen af skorhedsrevnen, og folgelig er det, selv om daeknings-pladen 26 er fastgjort ved hjaelp af kantsomsvejsning, muligt at forhindre skorheds-revnen i at udbrede sig fra svejsesamlingsdelen 6 ind i den evre daeksplade 4.Because the edge weld has a short leg length, the edge weld has little influence on the propagation of the chimney crack, and consequently, although the cover plate 26 is secured by the edge weld, it is possible to prevent the chimney crack from propagating from the weld assembly 6. in the evre cover plate 4.

Der gives nu beskrivelse af et positionsforhold mellem svejsesomdelen 6 i lugekarms-pladen 2 og en svejsesomdel 6' i sideklaedningspladen 14 eller inderskrogspladen 16. I det traditionelle containerskib vil svejsesamlingsdelen 6 og svejsesamlingsdelen 6' med henblik pa at skabe storre sikkerhed vaere anbragt forskudt fra hinanden i pilens A retning. som vist i figur 2B. I modsaetning hertil kan svejsesamlingsdelen 6 og svejsesamlingsdelen 6' i den fore-liggende udforelsesform blive anbragt ved samme position i pilens A retning, som vist i figur 3B. Dette skyldes, at udbredelsen af skorhedsrevnen kan stoppes af graenselaget mellem svejsesamlingsdelen 6 og den ovre daeksplade 4, som omtalt ovenfor, sêfremt skorhedsrevnen opstêr i svejsesamlingsdelen 6.Description is now given of a position relationship between the welding element 6 in the hatch plate 2 and a welding element 6 'in the side cladding plate 14 or the inner hull plate 16. In the traditional container ship, the weld joint part 6 and the weld joint part 6' are arranged to be displaced from one another for greater safety. in the A direction of the arrow. as shown in Figure 2B. In contrast, in the present embodiment, the weld joint portion 6 and the weld joint portion 6 'may be positioned at the same position in the direction of arrow A, as shown in Figure 3B. This is because the propagation of the chimney crack can be stopped by the boundary layer between the weld joint portion 6 and the upper cover plate 4, as discussed above, if the chimney crack is raised in the weld joint member 6.

Som naevnt ovenfor er det i den foreliggende opfindelse, fordi det er muligt at lade positionerne af svejsesamlingsdelene 6 og 6' i pilens A retning vaere ens, muligt at opnê folgende punkter (1) til (3). (1) Det er muligt at udforme og eksekvere uden at vaere saerlig opmaerksom pa positio-nen af svejsesamlingsdelen 6 i lugekarmspladen 2 og positionen af svejsesamlingsdelen 6' i den ovre daeksplade 4. (2) Det er muligt at montere lugekarmen og den ovre daeksplade 4 som en samlet blok i en dok (en bedding). (3) I containerskibet, hvori samme konstruktion gentages pr. lastrum, er det muligt at forene delene. I modsaetning hertil har de respektive laengder af lugekarmen og den ovre daeksplade traditionelt ikke vaeret regelmaessige pr. lastrum for derved at forhindre positionerne af svejsesamlingsdelene 6 og 6' i at ligge ved samme position. I denne situation er en svejsesamlingsdel 7 for den ovre daeksplade 4 vist i figur 3B, 3C og 2B, mens svejsesamlingsdelen 7 er udeladt i de andre tegninger. (Anden udforelsesform)As mentioned above, in the present invention, because it is possible to leave the positions of the welding joint parts 6 and 6 'in the direction of arrow A, the following points (1) to (3) can be obtained. (1) It is possible to design and execute without paying particular attention to the position of the weld joint part 6 in the hatch plate 2 and the position of the weld joint part 6 'in the upper cover plate 4. (2) It is possible to mount the hatch frame and the upper cover plate. 4 as a total block in a dock (a bedding). (3) In the container ship in which the same construction is repeated per cargo compartment, it is possible to unite the parts. In contrast, the respective lengths of the hatch frame and the upper cover plate have not traditionally been regular per day. cargo space thereby preventing the positions of the weld joint members 6 and 6 'from being at the same position. In this situation, a weld joint portion 7 of the upper cover plate 4 is shown in Figures 3B, 3C and 2B, while the weld joint portion 7 is omitted in the other drawings. (Second embodiment)

Derefter folger en beskrivelse af en svejst konstruktion ifolge en anden udforelsesform for opfindelsen. Konfigurationen ud over den nedenfor beskrevne konfiguration kan vaere den samme som konfigurationen af den forste udforelsesform.Then follows a description of a welded construction according to another embodiment of the invention. The configuration other than the configuration described below may be the same as the configuration of the first embodiment.

Figur 6A er et forstorret billede af et omrade vist i figur 3C, men viser dog den svejste konstruktion ifolge den anden udforelsesform. Ydermere er figur 6B et billede set i pilens retning langs linien b-b i figur 6A.Figure 6A is an enlarged view of an area shown in Figure 3C, but showing the welded construction according to the second embodiment. Furthermore, Figure 6B is a view seen in the direction of the arrow along line b-b of Figure 6A.

Som vist i figur 6A og 6B er en kontakthindrende del 28 anbragt mellem svejsesamlingsdelen 6 og den ovre daeksplade 4 naer ved tilslutningspositionen mellem svejsesamlingsdelen 6 og den ovre daeksplade 4, saledes at svejsesamlingsdelen 6 for-hindres i at blive bragt i kontakt med den ovre daeksplade 4. Den kontakthindrende del 28 kan f.eks. udformes af et blodt stél, der har en stor sejhed. Ydermere kan formen af den kontakthindrende del 28 vaere udformet plan, hvorved fire hjorner af en ovre overbade deraf danner en glat krum form, som vist i figur 6A og 6B.As shown in Figures 6A and 6B, a contact obstructing member 28 is disposed between the weld joint portion 6 and the upper cover plate 4 near the connection position between the weld joint member 6 and the upper cover plate 4, thus preventing the weld joint member 6 from being contacted with the upper cover plate. 4. The contact barrier part 28 can e.g. is made of a soft stele that has a great toughness. Furthermore, the shape of the contact obstructing part 28 may be formed plane, whereby four corners of an upper surface thereof form a smooth curved shape, as shown in Figures 6A and 6B.

For at kunne anbringe den kontakthindrende del 28 er lugekarmspladen 2 forsynet med et hul (som ikke er vist i figur 6A og 6B), der traenger ind i tykkelsesretningen naer den forreste ende af den ovre daeksplade 4 af svejsesamlingsdelen 6. Hullet og den kontakthindrende del 28 kan have samme tvaersnitsform vinkelret pa hullets penetre-ringsretning og samme storrelse. Alternativt kan den kontakthindrende del 28 have en tvaersnitsform vinkelret pê hullets penetreringsretning, som afviger fra hullet, eller kan have en mindre storrelse i tvaersnit vinkelret ρέ hullets penetreringsretning end hullet. I den svejste konstruktion ifolge den anden udforelsesform og fordi den kontakthindrende del 28 forhindrer svejsesamlingsdelen 6 i at blive bragt i kontakt med den ovre daeksplade 4, er det sikret, at der mellem svejsesamlingsdelen 6 og den ovre daekspladedel 4 i den retning, hvori svejsesamlingsdelen 6 peger hen mod den ovre daekspladedel 4, ikke findes en skorhedsrevne-udbredelsesbane mellem svejsesamlingsdelen 6 og den ovre daeksplade 4. Folgelig er det muligt at stoppe skorheds-revners udbredelse i svejsesamlingsdelen 6, i graenselaget mellem svejsesamlingsdelen 6 og den ovre daeksplade 4.In order to position the contact obstructing part 28, the hatch frame plate 2 is provided with a hole (not shown in Figures 6A and 6B) which penetrates in the thickness direction near the front end of the upper cover plate 4 of the welding joint part 6. The hole and the contact preventing part 28 may have the same cross-sectional shape perpendicular to the penetration direction of the hole and the same size. Alternatively, the contact obstruction portion 28 may have a cross-sectional shape perpendicular to the penetration direction of the hole which differs from the hole, or may have a smaller cross-sectional size perpendicular to the penetration direction of the hole than the hole. In the welded construction according to the second embodiment and because the contact obstructing part 28 prevents the welding joint part 6 from being contacted with the upper cover plate 4, it is ensured that between the welding joint part 6 and the upper cover plate part 4 in the direction in which the welding joint part 6 pointing toward the upper cover plate portion 4, there is no chimney-tearing propagation path between the weld assembly portion 6 and the upper cover plate 4. Accordingly, it is possible to stop the distribution of the tear cracks in the weld assembly portion 6, in the interface between the weld assembly portion 6 and the upper cover plate 4.

Ydermere er det som vist i figur 6B muligt at tilslutte den kontakthindrende del 28 til lugekarmspladen 2 og den 0vre daeksplade 4 ved at kantspmsvejse delen 22. Folgelig er det muligt at gore lugekarmspladen 2 vandtaet gennem at lukke et mellemrum, der danner en vandpassage mellem den kontakthindrende del 28 og lugekarmspladen 2 og den ovre daeksplade 4. Som naevnt ovenfor og fordi kantsomsvejsningen har den korte benlaengde, har kantspmsvejsningen ringe indflydelse pa udbredelsen af skor-hedsrevnen. Folgelig er det, selvom den kontakthindrende del 28 er fastgjort ved hjaelp af kantsomsvejsning, muligt at stoppe udbredelsen af skorhedsrevnen fra svej-sesamlingsdelen 6 ind i den 0vre daeksplade 4. I et omrade, hvori den kontakthindrende del 28 ikke findes i pilens A retning i figur 6B, kan lugekarmspladen 2 og den ovre daeksplade 4 i dette tilfaelde vaere fojet sammen med den samme svejsning som i figur 4B eller 4D.Furthermore, as shown in Figure 6B, it is possible to connect the contact obstructing part 28 to the hatch plate 2 and the upper cover plate 4 by edge welding part 22. Accordingly, it is possible to make the hatch plate 2 waterproof by closing a gap which forms a water passage between it. contact obstruction portion 28 and hatch plate 2 and upper cover plate 4. As mentioned above and because the edge weld has the short leg length, the edge spun weld has little influence on the spread of the chimney tear. Accordingly, although the contact barrier portion 28 is secured by edge welding, it is possible to stop the propagation of the cracks from the weld joint portion 6 into the upper cover plate 4. In an area where the contact barrier portion 28 is not in the direction of arrow A in the Figure 6B, the hatch frame plate 2 and the upper cover plate 4 may in this case be joined together with the same welding as in Figure 4B or 4D.

Som vist i figur 6C kan den kontakthindrende del 28 vaere fojet til lugekarmspladen 2 og den 0vre daeksplade 4 med en kantsomsvejset del 22 for at sammenfoje lugekarmspladen 2 og den ovre daeksplade 4.As shown in Figure 6C, the contact preventing portion 28 may be joined to the hatch plate 2 and the upper cover plate 4 with an edge welded portion 22 to join the hatch plate 2 and the upper cover plate 4.

Figur 7 er et forstprret billede af et omrède omkranset af en punkteret linie A i figur 6A, men her vises, at der er tilvejebragt en nedtrykningsdel 28A i den kontakthindrende del 28. I dette tilfaelde er den kantspmsvejste del 22 udeladt i figur 7. I den anden udfprelsesform foretraekkes det, at en nedtrykningdel 28A, som forhindrer et svejsemetal, der anvendes til at svejse lugekarmspladen 2, i at traenge ind i den kontakthindrende del 28, er udformet i en overflade (en ovre overflade i eksemplet i figur 7) af den kontakthindrende del 28, som peger i en retning, hvori svejsesamlings-delen 6 straekker sig mod den 0vre daeksplade 4, som vist i figur 7. Nedtrykningsdelen 28a er udformet glat. For eksempel er nedtrykningsdelen 28A udformet glat, sêledes at dybden af nedtrykningsdelen 28a, og dybden af nedtrykningen bliver gradvis mindre fra midten ud mod en periferikant af nedtrykningsdelen 28a.Figure 7 is an enlarged view of an area bordered by a dashed line A in Figure 6A, but it is shown here that a depression portion 28A is provided in the contact obstructing portion 28. In this case, the edge spun welded portion 22 is omitted in Figure 7. in the second embodiment, it is preferred that a depression portion 28A which prevents a weld metal used to weld the hatch plate 2 from penetrating into the contact obstructing portion 28 is formed in a surface (an upper surface of the example in Figure 7) of the contact obstructing portion 28 pointing in a direction in which the weld joint portion 6 extends toward the upper cover plate 4, as shown in Figure 7. The depression portion 28a is formed smoothly. For example, the depression portion 28A is formed smoothly, such that the depth of the depression portion 28a, and the depth of the depression gradually decrease from the center toward a peripheral edge of the depression portion 28a.

Svejsemetallet fra svejsesamlingsdelen 6 rummes i nedtrykningsdelen 28a pê tids-punktet for svejsning af lugekarmspladerne 2 (metalpladerne 2a) til hinanden i en stilling, hvori den kontakthindrende del 28 er indrettet som vist i figur 7 gennem udform-ning af nedtrykningsdelen 28a, hvorved et er muligt at forhindre svejsemetal i at traenge ind i den kontakthindrende del 28.The weld metal from the weld assembly 6 is contained in the depression part 28a at the time of welding the hatch plate 2 (metal plates 2a) to each other in a position in which the contact obstructing part 28 is arranged as shown in Figure 7 by forming the depression part 28a, whereby one is it is possible to prevent weld metal from penetrating into the contact barrier part 28.

Ydermere er det muligt at udforme svejsemetallet i graenselaget mellem svejsesam-lingsdelen og den kontakthindrende del 28 i en glat form gennem at forme nedtryk-ningsdelen 28a glat.Furthermore, it is possible to form the weld metal in the interfacial layer between the weld joint member and the contact obstructing member 28 in a smooth shape by smoothly forming the depression member 28a.

Folgelig er det muligt at forhindre et traethedsbrud i at opsta i den kontakthindrende del 28. Der foretages nu sammenligning med situationen i figur 8. Figur 8 viser en situation, hvor nedtrykningsdelen 28a ikke er tilvejebragt i den kontakthindrende del 28a, som bestar af blodt stal. I tilfaeldet i figur 8, og fordi der ikke er formet en nedtryknings-del 28a, traenger svejsemetal ind i den kontakthindrende del 28, og det er umuligt at regulere formen af svejsemetal i graenselaget imellem svejsesamlingsdelen 76 og den kontakthindrende del 28. Folgelig bliver formen af svejsemetallet ikke glat, og der er mulighed for, at der opstar en spaendingskoncentration, og det er muligt at traetheds-styrken med hensyn til gentagne belastninger bliver lavere. I eksemplet i figur 7 er det derimod, fordi det er muligt at forhindre svejsemetallet i at traenge ind i den kontakthindrende del 28 pa grund af nedtrykningsdelen 28a, og det er muligt at gore formen af svejsemetallet glat i graenselaget mellem svejsesamlingsdelen 6 og den kontakthindrende del 28, at forhindre spaendingskoncentration i at opstê i den kontakthindrende del 28.Accordingly, it is possible to prevent a fatigue fracture from arising in the contact obstruction part 28. Comparison is now made with the situation in Figure 8. Figure 8 shows a situation where the depression part 28a is not provided in the contact obstruction part 28a consisting of blood steel. . In the case of Figure 8, and because no depression portion 28a is formed, weld metal penetrates into the contact-inhibiting portion 28, and it is impossible to regulate the shape of weld metal in the boundary layer between the weld joint portion 76 and the contact-inhibitory portion 28. Accordingly, the mold becomes of the weld metal is not smooth, and there is a possibility that a stress concentration is created and it is possible that the fatigue strength with regard to repetitive loads is lower. In the example of Figure 7, on the other hand, it is possible to prevent the weld metal from penetrating into the contact-inhibiting part 28 due to the depression part 28a, and it is possible to smooth the shape of the weld metal in the interface between the welding joint part 6 and the contact-preventing part. 28, to prevent stress concentration from occurring in the contact inhibiting part 28.

Det foretraekkes ydermere, at den kontakthindrende del 28 er fremstillet af et materiale (f.eks. et keramisk materiale), hvori svejsemetallet ikke traenger ind. Folgelig er det muligt mere sikkert at forhindre svejsemetallet i at traenge ind i den kontakthindrende del 28, og det er muligt at gore formen af svejsemetallet glat i graenselaget mellem svejsesamlingsdelen 6 og den kontakthindrende del 28. Den kontakthindrende del 28 kan uden at skabe nedtrykningsdelen 28a vaere fremstillet af det materiale, hvori svejsemetallet ikke traenger ind.It is further preferred that the contact barrier part 28 is made of a material (e.g. a ceramic material) in which the weld metal does not penetrate. Accordingly, it is possible to more safely prevent the weld metal from penetrating into the contact barrier part 28, and it is possible to smooth the shape of the weld metal in the interfacial layer between the weld joint member 6 and the contact preventive member 28. The contact inhibitor member 28 can, without creating the depression member 28a. be made of the material in which the weld metal does not penetrate.

Det foretraekkes ydermere, at formen og dimensionen af den kontakthindrende del 28, som har nedtrykningsdelen 28a, omtrent svarer til formen og dimensionen af det i lu-gekarmspladen 2 udformede hul 2b til fastgoring af den kontakthindrende del 28 pê samme made som vist i figur 6A og 6B. Herved foretraekkes det, at hullet 2b er fremstillet med en indforingsmargen for at indfore den kontakthindrende del 28 i hullet 2b. (Tredje udforelsesform)It is further preferred that the shape and dimension of the contact obstructing portion 28 having the depression portion 28a approximately correspond to the shape and dimension of the hole 2b formed in the locking frame plate 2 for securing the contact obstructing portion 28 in the same manner as shown in Figure 6A. and 6B. Hereby, it is preferred that the hole 2b is made with an insertion margin to insert the contact obstructing portion 28 into the hole 2b. (Third embodiment)

Figur 9A er et billede set ind mod linien b-b i figur 3A, men her vises en svejst kon-struktion ifelge en tredje udforelsesform (svarende til den anden opfindelse) for op-findelsen anvendt til en lugekarm pê et containerskib. Som vist i figur 9A inkluderer den svejste konstruktion ifolge den tredje udforelsesform en konfiguration, hvori ende-fladerne af to eller fiere metalplader 2a (stêlplader i denne udforelsesform) bringes ind mod hinanden for at kunne blive samlet ved svejsning.Figure 9A is a view towards line b-b of Figure 3A, but here is shown a welded construction according to a third embodiment (similar to the second invention) of the invention used for a hatch frame on a container ship. As shown in Figure 9A, the welded construction according to the third embodiment includes a configuration in which the end faces of two or four metal plates 2a (steel plates in this embodiment) are brought together to be joined by welding.

Figur 9B er et forstorret billede af et omrêde markeret med pilen B i figur 9A. Som vist i figur 9B og ifolge den tredje udforelsesform er et hul 29, som traenger gennem svejse-samlingsdelen 6, udformet i tykkelsesretningen af lugekarmspladen 2 pê en sédan made, at svejsesamlingsdelen 6, der straekker sig mellem to metalplader 2a, deles pê straekningen derimellem.Figure 9B is an enlarged view of an area marked by arrow B in Figure 9A. As shown in Figure 9B and according to the third embodiment, a hole 29 which penetrates through the weld joint portion 6 is formed in the thickness direction of the hatch plate 2 in such a way that the weld joint portion 6 extending between two metal plates 2a is divided on the stretch therebetween. .

Som naevnt ovenfor vil der ifolge den tredje udforelsesform, og fordi hullet 29 er tilveje-bragt gennem svejsesamlingsdelen 6, ikke eksistere en skorhedsrevne-udbredelses-bane mellem de adskilte svejsesamlingsdele 6. Folgelig er det muligt at stoppe en skorhedsrevne mod udbredelse mellem de delte svejsesamlingsdele 6. Folgelig kan skorhedsrevnen, som opstar i svejsesamlingsdelen 6 og udbredes i svejsesamlingsdelen 6, blive stoppet mellem de delte svejsesamlingsdele 6.As mentioned above, according to the third embodiment, and because the hole 29 is provided through the weld joint portion 6, there will be no rupture-crack propagation path between the separate weld joint members 6. Accordingly, it is possible to stop a rupture-crack propagation between the shared weld joint members. 6. Accordingly, the chipping crack that arises in the weld joint portion 6 and propagates in the weld joint portion 6 can be stopped between the divided weld joint members 6.

Ydermere er det, fordi konstruktionen er fremstillet sédan, at den stopper skor-hedsrevner mod udbredelse gennem udformning af hullet 29 til opdeling af svejsesamlingsdelen 6, muligt at anvende den pê et eksisterende containerskib. For eksem-pel kan det eksisterende containerskib kun blive forsynet med skorhedsrevne-ud-bredelseshindrende funktion gennem at lade hullet 29 penetrere svejsesamlingsdelen 6 mellem to metalplader 2a derfindes i det eksisterende containerskib.Furthermore, because the structure is manufactured such that it stops chipping cracks against propagation through the design of the hole 29 for dividing the weld joint portion 6, it can be applied to an existing container ship. For example, the existing container ship can only be provided with chimney-tear expansion preventing function by allowing the hole 29 to penetrate the weld joint portion 6 between two metal plates 2a found in the existing container ship.

Som naevnt ovenfor og ifolge opfindelsen er den svejste del et koncept inkluderende et svejsemetal og et omrêde, hvori sejheden er saenket pê grund af termisk pêvirkning pê tidspunktet for svejsningen. I et eksempel i figur 9B inkluderer svejsesamlingsdelen 6 en svejsemetaldel 6a og en varmepêvirket zone 6b, hvori sejheden er saenket gennem den termiske virkning pê svejsetidspunktet. Folgelig bliver ikke kun svejsemetaldelen 6a men ogsê den varmepêvirkede zone 6b delt af hullet 29.As mentioned above and according to the invention, the welded part is a concept including a weld metal and an area in which the toughness is lowered due to thermal effect at the time of welding. In an example in Figure 9B, the weld joint member 6 includes a weld metal member 6a and a heat-affected zone 6b wherein the toughness is lowered by the thermal effect at the time of welding. Consequently, not only the weld metal part 6a but also the heat-affected zone 6b is divided by the hole 29.

Hullet 29 kan f.eks. udformes ved maskinbearbejdning under brug af en skaere-braender eller andre egnede maskiner. Folgelig er det muligt at tilkoble den skorheds-revne-udbredelseshindrende funktion uden brug af noget specifikt stêlmateriale eller svejse metal.The hole 29 may e.g. is designed by machining using a cutter burner or other suitable machines. Accordingly, it is possible to engage in the crack-crack propagation-inhibiting function without the use of any specific steel material or weld metal.

Hullet 29 er udformet cirkulaert i et tvaersnit vinkelret pê tykkelsesretningen af luge-karmspladen 2 i udforelsesformen i figur 9B, men kan dog udformes med andre egnede former sêsom en oval form eller lignende set i tvaersnit. I dette tilfaelde har hullet 29 fortrinsvis en form, hvor en yderkant af hullet 29 er glat set i tvaersnit.The hole 29 is formed in a cross-section perpendicular to the thickness direction of the hatch plate 2 in the embodiment of Fig. 9B, but can however be formed with other suitable shapes such as an oval shape or the like seen in cross-section. In this case, the hole 29 preferably has a shape in which an outer edge of the hole 29 is smooth in cross-section.

Dimensionen af hullet 29 i én retning (en lateral retning i figur 9B), hvori endefladerne af metalpladerne 2a peger mod hinanden, saettes storre end dimensionen af svejse-samlingsdelen 6 i samme retning. Dimensionen af hullet 29 fastsaettes pê en sédan made, at styrkereduktionen af den svejste konstruktion som folge af det fjernede tvaer-snitsareal ligger inden for et tilladeligt interval. Ydermere kan dimensionen af hullet 29 i lodret retning i figur 9B saettes til omtrent samme niveau som dimensionen af hullet 29 i lateral retning i figur 9B. I dette tilfaelde, og sêfremt dimensionen af svejsesamlingsdelen 6 i lodret retning i figur 5C stiger fra en venstre side til en hojre side i figur 5C i tvaersnit vinkelret pê tykkelsesretningen af lugekarmspladen 2, som vist i figur 5C, kan dimensionen af hullet 29 i lodret retning i figur 5C blive oget pa samme méde som svejsesamlingsdelen 6, eller kan vaere konstant fra venstre side mod hojre side i figur 5C. I det tilfaelde, hvor lugekarmspladen 2 er gjort vandtaet, kan daekningspladen 26, der lukker hullet 29, ydermere blive fastgjort til lugekarmspladen 2 pê samme méde som i den forste udforelsesform. Daekningspladen 26 kan tilsluttes til lugekarmspladen 2 ved kantsomsvejsning pê samme méde som i den forste udforelsesform. I det tilfaelde, at hullet 29 er tilvejebragt ved en position taet den ovre daeksplade, kan daekningspladen 26 blive samlet med den ovre daeksplade i tillaeg til lugekarmspladen 2 gennem kant-somsvejsning. (Andre udforelsesformer)The dimension of the hole 29 in one direction (a lateral direction in Fig. 9B), in which the end faces of the metal plates 2a face each other, is set larger than the dimension of the welding joint part 6 in the same direction. The dimension of the hole 29 is determined in such a way that the strength reduction of the welded structure as a result of the removed cross-sectional area is within a permissible range. Furthermore, the dimension of the hole 29 in the vertical direction in Figure 9B can be set to about the same level as the dimension of the hole 29 in the lateral direction in Figure 9B. In this case, and if the dimension of the weld joint portion 6 in the vertical direction in Figure 5C increases from a left side to a right side in Figure 5C in a cross-section perpendicular to the thickness direction of the hatch plate 2, as shown in Figure 5C, the dimension of the hole 29 in the vertical direction in Figure 5C is increased in the same manner as the weld joint portion 6, or may be constant from the left side to the right side in Figure 5C. Furthermore, in the case where the hatch plate 2 is waterproofed, the cover plate 26 closing the hole 29 may be attached to the hatch plate 2 in the same manner as in the first embodiment. The cover plate 26 can be connected to the hatch plate 2 by edge welding in the same manner as in the first embodiment. In the event that the hole 29 is provided at a position close to the upper cover plate, the cover plate 26 may be joined with the upper cover plate in addition to the hatch plate 2 through edge seam welding. (Other embodiments)

Lugekarmspladen 2 og den ovre daeksplade 4 svarer hver isaer til samlingspladen og den tilsluttede plade i kravene, men de andre dele vil ogsê kunne udgore sammenfoj-ningspladen og den tilsluttede plade. For eksempel kan den ovre daeksplade 4 i con- tainerskib vaere samlingspladen, og sideklaedningspladen 14 kan vaere den tilsluttede plade, eller inderskrogspladen 16 kan vaere sammenfojningspladen, og den ovre daeksplade 4 kan vaere den tilsluttede plade.The hatch plate 2 and the upper cover plate 4 each correspond, in particular, to the assembly plate and the connected plate in the claims, but the other parts will also constitute the joining plate and the connected plate. For example, the upper cover plate 4 in container ship may be the collecting plate and the side cover plate 14 may be the connected plate, or the inner hull plate 16 may be the joining plate and the upper cover plate 4 may be the connected plate.

Selvom hullet 18 og den kontakthindrende del 28 kan have andre former eller dimen-sioner end den pa tegningen viste form eller dimension, er det muligt at opna virknin-gen ifolge opfindelsen. Folgelig vil hullet og den kontakthindrende del 28 i kravene ikke vaere begraenset til den viste form eller dimension.Although the hole 18 and the contact obstruction part 28 may have shapes or dimensions other than the shape or dimension shown in the drawing, it is possible to achieve the effect of the invention. Accordingly, the hole and contact obstruction portion 28 of the claims will not be limited to the shape or dimension shown.

Ydermere kan opfindelsen anvendes pa andre svejste konstruktioner uden at vaere begraenset til et containerskib. For eksempel kan opfindelsen anvendes pê en egnet svejst konstruktion, hvori der kraeves en skorhedsrevne-udbredelseshindrende funk-tion, f.eks. i en bulk carrier, en marin konstruktion, en bygning (eller konstruktion) over jorden eller lignende. I den tredje udforelsesform er et hul 29 tilvejebragt ved positionen taet ved den ovre daeksplade 4, som vist i figur 9A og 9B, men den kan ogsa vaere tilvejebragt ved en anden position, eller et storre antal huiler kan vaere tilvejebragt ved et forudbestemt interval i en retning, hvori svejsesamlingsdelen 6 straekker sig. Ydermere kan hullet 29 ifolge den tredje udforelsesform vaere tilvejebragt i tillaeg til hullet 18 ifolge den forste udforelsesform.Furthermore, the invention can be applied to other welded structures without being limited to a container ship. For example, the invention may be applied to a suitable welded construction which requires a tear-off anti-rollout function, e.g. in a bulk carrier, a marine structure, a building (or construction) above ground, or the like. In the third embodiment, a hole 29 is provided at the position closed at the upper cover plate 4, as shown in Figures 9A and 9B, but it may also be provided at a different position, or a larger number of weights may be provided at a predetermined interval in a direction in which the weld joint portion 6 extends. Further, the hole 29 according to the third embodiment may be provided in addition to the hole 18 according to the first embodiment.

Som naevnt ovenfor er det helt klart, at opfindelsen ikke begraenser sig til de ovenfor naevnte udforelsesformer, men kan vaere modificeret pê forskellig méde inden for rammerne af opfindelsen.As mentioned above, it is quite clear that the invention is not limited to the above mentioned embodiments, but may be modified in various ways within the scope of the invention.

Claims

A welded structure comprising: a joint plate formed of two metal plates (2) connected directly to each other by welding; and a connected plate (4) connected to the junction plate by welding, wherein the two metal plates (2) have an intermediate welding joint portion (6) extending in the direction of the connected plate (4) to a portion close to a connected position between the connecting plate and the connected plate (4), characterized in that in the direction in which the welding joint part (6) extends towards the connected plate (4), the welding joint part (6) and the connected plate (4) are configured. so as not to be in contact with each other, and between the weld joint portion (6) and the connected plate (4), no welded portion is present, therefore, the joint plate and the connected plate (4) bond a hole (18) through the joint plate in the thickness direction. is formed in the joint plate to be located between the weld joint portion (6) and the connected plate (4) and to be in a position close at the connection position, and an interior space of the hole (18) is maintained to hold the weld joint portions. the connector (6) and the connected plate (4) out of contact with each other and also prevent a welding part connecting the connecting plate and the connected plate (4) between the welding joint part (6) and the connected plate (4).

A welded structure comprising a joint plate formed of two metal plates (2) directly connected by welding, wherein the joint plate has a weld joint portion (6) extending between the two metal plates (2), characterized in that a hole (18). ) is designed to penetrate the weld joint portion (6) in the thickness direction of the joint plate so that the weld joint portion (6) is divided and an interior space of the hole (18) is maintained.

3. A welded construction according to claim 1 or 2, wherein a cover part (26) is provided which closes an opening to the hole (18) and the cover part (26) is connected to at least one of the connecting part and the connected part by means of kantsemsvejsning.

A welded structure comprising: a joint plate formed of two metal plates (2) which are directly connected to each other by welding; and a connected plate (4) connected to the junction plate by welding, wherein the two metal plates (2) have an intermediate welding joint portion (6) extending in the direction of the connected plate (4) to a portion close to a connection position between the connecting plate and the connected plate (4), characterized in that in a direction in which the welding joint part (6) extends towards the connected plate (4), the welding joint part (6) and the connected plate (4) are configured not to are in contact with each other and between the weld joint part (6) and the connected plate (4) no welded part is present, therefore the joint plate and the connected plate (4), a hole (18) extending through the joint plate in the thickness direction is formed in the the connecting plate for being between the welding assembly part (6) and the connected plate (4) and being in a position close at the connecting position, and a contact obstruction (28) part being placed in an interior space in the hole (18) ) to keep the weld joint portion (6) and the connected plate (4) out of contact with one another and also prevent any weld portion between the weld joint portion (6) and the connected plate (4), therefore, the joint plate and the connected plate (4) ).