JP3845821B2 - Steel door - Google Patents

Steel door Download PDF

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Publication number
JP3845821B2
JP3845821B2 JP2002341934A JP2002341934A JP3845821B2 JP 3845821 B2 JP3845821 B2 JP 3845821B2 JP 2002341934 A JP2002341934 A JP 2002341934A JP 2002341934 A JP2002341934 A JP 2002341934A JP 3845821 B2 JP3845821 B2 JP 3845821B2
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Japan
Prior art keywords
bent
door
plate
edge
steel
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JP2002341934A
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JP2004176327A (en
Inventor
俊彦 塚山
良司 冨山
明邦 内田
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Sanwa Shutter Corp
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Sanwa Shutter Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、玄関等の建築物の開口部に設けられる鋼製ドアの技術分野に属するものである。
【0002】
【従来の技術】
一般に、この種玄関等の建築物の開口部に設けられるドアのなかには、表裏一対の鋼板の少なくとも三方に折曲部を形成し、これら折曲部同志を溶接により一体化することにより所定のドア厚を存するように構成した鋼製ドアが知られている。このような鋼製ドアにおいて、表裏鋼板同志の一体化をレーザービーム溶接により行うことが提唱されており、これによって、鋼板の変形を防止することができ、かつ、溶接痕の残らない一体化を実現している(例えば、特許文献1参照。)。
【0003】
【特許文献1】
特開2002−174082号公報
【0004】
【発明が解決しようとする課題】
ところで、前記従来のものは、表裏一対の鋼板の周縁部に形成される折曲部同志をレーザービーム溶接するにあたり、溶接可能な折曲部の突合せ状態についての提示がなされている。
一方、このような鋼製ドアを量産するにあたり、鋼板の切断時における寸法誤差、折曲部の形成時における誤差を考慮する必要がある。これに対し、前記特許文献1に提示されるものは、このような誤差を考慮するものではなく、特に、折曲部の端面同志をレーザービーム溶接するようなものにおいては、寸法誤差が生じたような場合では、折曲部の端面同志を全長にわたってぴったりと当接させることができない。この場合に、鋼板の板厚が厚いものであればレーザービーム溶接をすることで隙間を埋めることが可能であるが、鋼板の板厚が薄くなるほど隙間を埋めるのが難しく、寸法誤差の吸収ができないことも想定され、不良品の発生率が高くなってしまうという問題があり、ここに本発明が解決しようとする課題があった。
【0005】
【課題を解決するための手段】
本発明は、上記の如き実情に鑑み、これらの課題を解決することを目的として創作されたものであって、鋼板からなる表裏一対の面板の少なくとも上および左右三方の周縁部に折曲部を形成し、互いに対向する折曲部同志をレーザービーム溶接して所定のドア厚およびドア幅を有した鋼製ドアを構成するにあたり、鋼製ドアは、周縁部のうち上縁部または下縁部、あるいは上下両縁部の折曲部をそれぞれ対向する表裏面板方向に向けて折曲したL字状のL字状部に形成し、これらL字状部をドア厚調整自在に積層して構成すると共に、鋼製ドアの左右両縁部は、表面板の一方縁部を裏面板方向に向けて折曲したL字状部にし、他方縁部を折り返し状に折曲した折返し状部にし、裏面板の一方縁部を折り返し状に折曲した折返し状部にし、他方縁部を表面板方向に向けて折曲したL字状部にして、それぞれの縁部同士を、L字状部の板端面が折返し状部の板面にドア幅調整自在に突当てられるように構成されている鋼製ドアである。
そして、このようにすることにより、ドア厚方向の調整ができる状態で溶着することができて、左右縁部における折曲部同志の突合せ部に隙間ができないようにすることができ、レーザービーム溶接による溶着を確実、かつ、強固に行うことができ、鋼製ドアを量産するような場合に、不良品の発生を低減できる。
【0006】
【発明の実施の形態】
次に、本発明の実施の形態を図1〜図5の図面に基づいて説明する。
図面において、1は建築物の開口部に両開き状(開閉揺動自在)に取付けられる左右(親、子)一対の鋼製ドアのであって、これら鋼製ドア1の一方を構成する親扉2は、金属材で構成された表裏一対(前後)の面板(本発明の鋼板に相当)3、4を用いて構成されている。前記表裏面板3、4は、それぞれ矩形の金属製板材(鋼板)により構成されており、これら表裏面板3、4の左右縁部と上縁部とには、それぞれ折曲部が形成され、これら折曲部の対向するもの同志を、後述するような構成とするとともに、それぞれレーザービームによる溶接(溶着(一体化))をすることによって、表裏面板3、4とのあいだに折曲部によるドア厚(見込み面)が形成された親扉2が構成されるように構成されている。
【0007】
5は金属製板材を断面略冂字形状に折曲して構成した長尺状の骨材(所謂中骨として機能する)であって、該骨材5は、表裏面板3、4間の左右幅方向に所定間隔を存し、上下方向に伸長する状態で複数(本実施の形態では4本)配設されるとともに、下縁部に左右方向に伸長する状態で配設されている。尚、これら骨材5は、前後一対の脚片5a、5bと表裏面板3、4とのあいだに介装される両面テープ6により一体化されている。因みに、骨材5の表裏面板3、4への固定手段としては、一方の脚片5aと裏面板4とのあいだはレーザービーム(本実施の形態ではヤグレーザー)により溶着し、他方の脚片5bと表面板3とのあいだは両面テープ6により一体化することも可能である。
また、親扉2には、一方の側縁部に把手7、他方の側縁部(吊り元側の縁部)に躯体との連結のための上下方向複数箇所に配設された蝶番8、ドアクローザー(図示せず)等の必要な部材が取付けられている。
【0008】
さて、親扉2の左縁部における表裏面板3、4の一体化はつぎのようになされている。
まず、表面板3の左縁部に形成される折曲部は、先端が右縁部側を向き、かつ、表面板3の裏面に当接状態で折返し状に折曲された折曲片(本発明の折返し状部に相当する)3aに形成されている一方、裏面板4の左縁部に形成される折曲部は、先端が表面板3側を向くよう折曲された略L字状の折曲片(本発明のL字状部に相当する)4aに形成されている。そして、裏面側折曲片4aの先端面である板端面を、表面側折曲片3aの板面(裏面)に突当て、該突当て部に対し、略45度の傾斜方向を向くトーチ(図示せず)を用いてレーザービーム溶接することで一体化がなされており、該左縁側における親扉2のドア厚は、裏面側折曲片4aの長さ寸法に基づいて設定されている。このとき、裏面側折曲4aの板端面は、表面側折曲片3aの折返し端部(左端縁部)よりも内側に位置して突当てられており、これによって、折曲片3aの折返し部側が、子扉9側に突出する戸当り部2aに形成されている。
【0009】
一方、表面板3の右縁部に形成される折曲部は、先端が左縁部側を向き、かつ、表面板3とのあいだに所定の隙間を存する状態で折返し状に折曲(折返し状部に形成)されており、裏面板4側を向きドア厚を構成する第一折曲片3bと左縁部側を向く第二折曲片3cとを備えて構成されている。また、裏面板4の右縁部に形成される折曲部は、先端が表面板3側を向く状態の略L字状に折曲された折曲片(L字状部)4b部に形成されている。そして、裏面側折曲片4bの先端面である板端面を、表面側折曲部の第二折曲片3cの板面(裏面)に突当て、該突当て部に対し、略45度の傾斜方向を向くトーチ(図示せず)を用いてレーザービーム溶接することで一体化がなされており、該右縁側における親扉2のドア厚は、裏面側折曲片4bと表面側第一折曲片3bとの長さ寸法に基づいて設定されている。
【0010】
さらに、表面板3の上縁部に形成される折曲部は、先端が裏面板4側を向く状態の略L字状に折曲された折曲片(L字状部に相当)3dに形成される一方、裏面板4の上縁部に形成される折曲部は、先端が表面板3側を向く状態の略L字状に折曲された折曲片(L字状部に相当)4cに形成されている。そして、これら両折曲片3d、4cとは、板面同志が積層する状態、即ち、本実施の形態では、表面側折曲片3dの下側板面と、裏面側折曲片4cの上側板面とが当接する状態で重ね合わせた状態とし、該重ね合わせた部位に対し、二枚の板面に直交する方向を向くトーチ(図示せず)を用いてレーザービーム溶接することで一体化がなされており、該右縁側における親扉2のドア厚は、表面側第一折曲片3dと裏面側折曲片4cとに基づいて設定されている。
【0011】
尚、表裏面板3、4の下縁部は切断状態のままになっており、あいだに前記骨材5が、両脚片5a、5bと面板4、3とのあいだに介装される両面テープ6により一体化された状態となっており、該骨材5の両脚片5a、5bのあいだの間隙であって、底片部5cの長さ寸法に基づいて下縁部におけるドア厚が設定されている。
【0012】
そして、表裏面板3、4や骨材5をそれぞれ製作する過程において、切断、折曲の各工程において生じる寸法誤差に対し、左右方向(ドア幅方向)における寸法誤差は、表面板3の左右方向幅のある折曲片3a、第二折曲片3cの板面に対する裏面板4の左右の折曲片4a、4bの板端面の突当て位置を調整することにより吸収できるように設定されている。また、前後方向(ドア厚方向)における寸法誤差は、表裏面板3、4の上縁部の折曲片3d、4cの重ね合わせ量を調整することにより吸収できるように設定されている。これによって、例えば左右縁部の折曲部同志のあいだに寸法誤差があったとしても、これを上縁部の折曲片3d、4cとの重ね合せ量を調整することで吸収することができるうえ、上縁部はもとより、左右縁部における折曲部同志の突合せ部において隙間が形成されてしまうことがないように構成されている。尚、上下方向(ドア高さ方向)における誤差は、下端縁部が切放し状態となっているので、組み立て上に問題が生じることはなく、あえて調整機構は設けられていない。
【0013】
一方、子扉9は、金属製板材で構成される表裏一対の面板(鋼板)10、11を用いて構成される設定となっており、子扉9を構成する表裏面板10、11の左右縁部に形成される折曲部はつぎのように構成されている。
つまり、子扉9を構成する表裏面板10、11の左右縁部の折曲部は、表面板10の左側折曲部については、先端が右縁部側を向き、かつ、表面板10とのあいだに所定の隙間を存する状態で折返し状に折曲されており、裏面板11側を向いてドア厚を構成する第一折曲片10aと左縁部側を向く第二折曲片10bとを備えて構成され、右側折曲部については、裏面板11側に向けて折曲する略L字状の折曲片10cに構成されている。また、裏面板11の左側折曲部については、表面板10側に向けて折曲する略L字状の折曲片11aに構成され、右側折曲部については、先端が左縁部側を向き、かつ、裏面板11とのあいだに所定の隙間を存する状態で折返し状に折曲されており、表面板10側を向いてドア厚を構成する第一折曲片11bと右縁部側を向く第二折曲片10cとを備えて構成されている。
【0014】
また、表裏面板10、11の上下縁部については、親扉2と同様であって、上側折曲部はL字状の折曲片10d、11dに形成される一方、下縁部は切放し状に構成されている。
そして、表裏面板10、11とは、これらのあいだに上下方向を向いて配設される複数の骨材5と、下部に左右方向を向いて配設される骨材5とを両面テープ6を用いて介装した状態とし、左右縁部及び上縁部を対向せしめ、左縁部における表面側第二折曲片10bの板面と裏面側折曲片11aの板端面とのあいだ、右縁部における裏面側第二折曲片11cの板面と表面側折曲片10cの板端面とのあいだ、上縁部における折曲片10d、11dの板面同志のあいだを、前記親扉2と同様にそれぞれレーザービームによる溶接で一体化することで子扉9が形成されている。このとき、左右方向(ドア幅方向)における誤差は、表裏面板10、11の左右方向幅のある第二折曲片10b、11cの板面に対してL字状の折曲片10c、11aの板端面の突当て位置を調整することにより吸収され、また、前後方向(ドア厚方向)における誤差は、表裏面板10、11の上縁部の折曲片10d、11dの重ね合わせ量を調整することにより吸収できるように設定されている。尚、上下方向(ドア高さ方向)における誤差は、下端縁部が切放し状態となっているので、組み立て上に問題が生じないことは親扉2と同様である。また、子扉9においては、表面板10の右縁部における裏面板11との一体化部位は、表面板10に対して段差状になっているが、親扉2とともに子扉9を閉鎖したとき、親扉2の戸当り部2aに、前記段差部9aが対向するように設定されている。
【0015】
叙述の如く構成された本発明の実施の形態において、親扉2と子扉9とは、それぞれ表裏面板3、4、10、11の左右縁部と上縁部とに折曲部が形成され、これら折曲部同志がレーザービーム溶接して一体化されることにより、ドア厚を有した鋼製ドア1に構成されている。この場合に、親扉2と子扉9とは、レーザービーム溶接をすることで、周縁部の骨材を設けるような補強を不要とするとともに、溶接痕の後処理を不要とする意匠性の高いものに構成されるが、このものにおいて、左右方向における寸法誤差については、それぞれ左右方向に長い折曲部の板面に対し折曲部の板端面を突当てる構成にすることにより吸収でき、さらに、前後方向(ドア厚方向)の寸法誤差については、それぞれ折曲部の板面同志の重ね合わせ量を調整することにより吸収できる。この結果、各面板3、4、10、11や骨材5を切断、折曲加工する工程において寸法誤差が発生したような場合であっても、表裏面板3と4、10と11とを突き合せる段階で誤差を吸収することができ、両面板3と4、10と11の溶接部、折曲部同志の突合せ部に隙間ができてしまうような不具合がなく、良好な突合せ状態でレーザービーム溶接を実施することができることになって、溶着が確実、かつ、強固になるうえ、鋼製ドア1を量産するような場合であっても、不良品の発生を低減することができる。
しかも、このものにおいて、ドア厚調整可能な溶着構成は上縁部においてなされているため、表裏面板3、4または10、11の例えば左右縁部のあいだにおいて生じるドア厚方向の寸法誤差を、上縁部の折曲片3d、4cまたは10d、11dとの重ね合わせ量の調整によって吸収することができる。
【0016】
さらに、本発明が実施された形態では、ドア厚方向の調整に加えて左右幅方向についても調整自在となっていて、これら両方向の寸法誤差を吸収することができるので、表裏面板3、4または10、11の突合せ状態が各方向において良好となり、該良好な突合せ状態でのレーザービーム溶接ができることになって、より優れた製品を確実に量産することができる。
【0017】
尚、本発明は前記第一の実施の形態に限定されないことは勿論であって、折曲部をL字状部とし、これらL字状部を積層状に重ね合わせてレーザービーム溶接する部位を、前記第一の実施の形態のように鋼製ドアの上縁部ではなく、下縁部をL字状部として積層する構成とすることも可能であり、この場合では、上縁部を切放し状としてもよい。さらには、鋼板の四周に折曲部を設け、これら四周の折曲部同志をレーザービーム溶接するものにおいて、上下両縁部をL字状部に形成してドア厚方向に調整自在な状態とし、該上下縁部をレーザービーム溶接する構成とすることもでき、何れの場合であっても、これらの溶着部位(一体化部位)は上下端面に位置して目隠し状態となっているので、意匠的に劣るようなことはない。
【図面の簡単な説明】
【図1】 親扉の正面図である。
【図2】 親扉の横断面図である。
【図3】 親扉、子扉の縦断面図である。
【図4】 子扉の正面図である。
【図5】 子扉の横断面図である。
【符号の説明】
1 鋼製ドア
2 親扉
3 表面板
3a 折曲片
3b 第一折曲片
3c 第二折曲片
4 裏面板
5 骨材
6 両面テープ
9 子扉
10 表面板
10a 第一折曲片
10b 第二折曲片
10c 折曲片
11 裏面板
[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of steel doors provided in openings of buildings such as entrances.
[0002]
[Prior art]
In general, in a door provided at an opening of a building such as this kind of entrance, a predetermined door is formed by forming bent portions in at least three sides of a pair of front and back steel plates and integrating the bent portions by welding. Steel doors are known that are configured to be thick. In such steel doors, it has been proposed that the front and back steel plates be integrated by laser beam welding, thereby preventing deformation of the steel plates and ensuring that no welding marks remain. (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-174082
[Problems to be solved by the invention]
By the way, the said conventional thing is shown about the butt | matching state of the bendable part which can be welded in laser beam welding of the bend part formed in the peripheral part of a pair of front and back steel plates.
On the other hand, in mass production of such a steel door, it is necessary to consider a dimensional error when cutting a steel plate and an error when forming a bent portion. On the other hand, what is presented in Patent Document 1 does not consider such an error, and in particular, in the case where laser beam welding is performed on the end faces of the bent portion, a dimensional error has occurred. In such a case, the end faces of the bent portion cannot be brought into close contact over the entire length. In this case, if the plate thickness of the steel plate is thick, it is possible to fill the gap by laser beam welding, but the thinner the plate thickness of the steel plate, the more difficult it is to fill the gap and absorption of dimensional errors. There is also a problem that the occurrence rate of defective products is increased, and there is a problem to be solved by the present invention.
[0005]
[Means for Solving the Problems]
The present invention has been created in order to solve these problems in view of the circumstances as described above, and has bent portions at least on a pair of front and back face plates made of steel plates and on the peripheral portions of the left and right sides. In forming a steel door having a predetermined door thickness and door width by laser beam welding of the bent portions facing each other, the steel door has an upper edge portion or a lower edge portion of the peripheral portion. Alternatively, the bent portions at both the upper and lower edges are formed into L-shaped L-shaped portions that are bent toward the opposite front and back plates , and the L-shaped portions are laminated so that the door thickness can be adjusted. The left and right edges of the steel door are L-shaped parts that are bent with the one edge of the front plate facing the direction of the back plate, and the other edge is a folded part that is folded back. One edge of the back plate is folded into a folded shape, and the other Parts in the L-shaped portion which is bent toward the surface plate direction, each of the edge portions, as plate end face of the L-shaped portion is not abutting freely door width adjustment on the plate surface of the folded-shaped portion It is a constructed steel door.
And by doing in this way, it can weld in the state where adjustment of the door thickness direction is possible, and it can be made so that there is no gap in the butt portion between the bent portions at the left and right edge portions, and laser beam welding It is possible to reliably and firmly perform welding by means of, and in the case of mass production of steel doors, it is possible to reduce the occurrence of defective products.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described based on the drawings of FIGS.
In the drawings, reference numeral 1 denotes a pair of left and right (parent and child) steel doors attached to an opening of a building in a double-opened manner (open and close swingable), and a parent door 2 constituting one of these steel doors 1 Is configured using a pair of front and back (front and rear) face plates (corresponding to the steel plate of the present invention) 3 and 4 made of a metal material. The front and back plates 3 and 4 are each composed of a rectangular metal plate (steel plate), and bent portions are formed on the left and right edges and the upper edge of the front and back plates 3 and 4, respectively. The doors formed by the bent portions between the front and back plates 3 and 4 are configured by forming the members facing each other at the bent portions as described later and welding (welding (integrating)) each with a laser beam. It is comprised so that the main door 2 in which thickness (expected surface) was formed may be comprised.
[0007]
Reference numeral 5 denotes a long aggregate (functioning as a so-called central bone) formed by bending a metal plate material into a substantially cross-sectional shape. A plurality of (four in the present embodiment) are arranged in a state of having a predetermined interval in the width direction and extending in the vertical direction, and arranged in a state of extending in the left-right direction at the lower edge portion. These aggregates 5 are integrated by a double-sided tape 6 interposed between the pair of front and rear leg pieces 5a, 5b and the front and back plates 3, 4. Incidentally, as a means for fixing the aggregate 5 to the front and back plates 3 and 4, the one leg piece 5a and the back plate 4 are welded by a laser beam (in this embodiment, a yag laser), and the other leg piece. The double-sided tape 6 can be integrated between 5b and the surface plate 3.
In addition, the main door 2 has a handle 7 on one side edge, and hinges 8 disposed at a plurality of locations in the vertical direction for connection to the housing on the other side edge (edge on the suspension side), Necessary members such as a door closer (not shown) are attached.
[0008]
Now, the front and back plates 3, 4 at the left edge of the main door 2 are integrated as follows.
First, the bent portion formed on the left edge portion of the front plate 3 is a bent piece that is folded back in a state in which the tip faces the right edge portion and is in contact with the back surface of the front plate 3 ( 3a (corresponding to the folded portion of the present invention), while the bent portion formed at the left edge of the back plate 4 is substantially L-shaped with the tip bent toward the front plate 3 side. A bent piece (corresponding to the L-shaped portion of the present invention) 4a is formed. Then, the plate end surface which is the front end surface of the back surface side bent piece 4a is abutted against the plate surface (back surface) of the front surface side bent piece 3a, and the torch which faces an inclination direction of about 45 degrees with respect to the abutting portion ( Integration is performed by laser beam welding using an unillustrated), and the door thickness of the main door 2 on the left edge side is set based on the length dimension of the back side bent piece 4a. At this time, the plate end surface of the back surface side bent piece 4a is abutted and located on the inner side of the folded end portion (left edge portion) of the front surface side bent piece 3a. The turned-up portion side is formed in the door contact portion 2a protruding to the child door 9 side.
[0009]
On the other hand, the bent portion formed at the right edge of the surface plate 3 is folded in a folded shape with the tip facing the left edge and a predetermined gap between the surface plate 3 and the surface plate 3 (folded back). The first bent piece 3b that faces the back plate 4 side and constitutes the door thickness and the second bent piece 3c that faces the left edge side are formed. Further, the bent portion formed at the right edge portion of the back plate 4 is formed in a bent piece (L-shaped portion) 4b that is bent in a substantially L shape with the front end facing the front plate 3 side. Has been. And the plate end surface which is the front end surface of the back surface side bent piece 4b is abutted against the plate surface (back surface) of the second bent piece 3c of the front surface side bent portion, and about 45 degrees with respect to the abutted portion. Integration is performed by laser beam welding using a torch (not shown) that faces an inclined direction, and the door thickness of the main door 2 on the right edge side is the back side bent piece 4b and the front side first fold. It is set based on the length dimension with the curved piece 3b.
[0010]
Further, the bent portion formed on the upper edge portion of the front plate 3 is a bent piece (corresponding to the L-shaped portion) 3d bent in a substantially L shape with the front end facing the back plate 4 side. On the other hand, the bent portion formed at the upper edge of the back plate 4 is a bent piece (corresponding to the L-shaped portion) bent in a substantially L shape with the tip facing the front plate 3 side. ) 4c. The two folded pieces 3d and 4c are in a state in which the plate surfaces are stacked, that is, in this embodiment, the lower plate surface of the front surface side bent piece 3d and the upper plate of the back surface side bent piece 4c. Integration is achieved by laser beam welding using a torch (not shown) facing the direction perpendicular to the two plate surfaces with respect to the overlapped portion. The door thickness of the main door 2 on the right edge side is set based on the front surface side first bent piece 3d and the back surface side bent piece 4c.
[0011]
The lower edge portions of the front and back plates 3 and 4 are left in a cut state, and the aggregate 5 is interposed between the leg pieces 5a and 5b and the face plates 4 and 3 with the double-sided tape 6 interposed therebetween. The door thickness at the lower edge is set based on the length of the bottom piece 5c, which is a gap between the leg pieces 5a and 5b of the aggregate 5. .
[0012]
In the process of manufacturing the front and back plates 3 and 4 and the aggregate 5, the dimensional error in the left and right direction (door width direction) is the left and right direction of the front surface plate 3 in contrast to the dimensional error that occurs in each of the cutting and bending processes. It is set so that it can be absorbed by adjusting the abutting positions of the plate end surfaces of the left and right bent pieces 4a, 4b of the back plate 4 with respect to the plate surfaces of the wide bent piece 3a and the second bent piece 3c. . Further, the dimensional error in the front-rear direction (door thickness direction) is set so as to be absorbed by adjusting the overlapping amount of the bent pieces 3d, 4c at the upper edge portions of the front and back plates 3, 4. As a result, even if there is a dimensional error between the bent portions at the left and right edge portions, for example, this can be absorbed by adjusting the amount of overlap with the bent pieces 3d and 4c at the upper edge portion. In addition, a gap is not formed at the abutting portion between the bent portions at the left and right edge portions as well as the upper edge portion. The error in the vertical direction (door height direction) is such that the lower end edge is in a state of being cut off, so that there is no problem in assembling, and no adjustment mechanism is provided.
[0013]
On the other hand, the child door 9 is configured to use a pair of front and back face plates (steel plates) 10 and 11 made of a metal plate material, and left and right edges of the front and back plates 10 and 11 constituting the child door 9. The bent part formed in the part is configured as follows.
In other words, the bent portions of the left and right edge portions of the front and back plates 10 and 11 constituting the child door 9 are the left bent portion of the surface plate 10 with the front end facing the right edge portion side and the surface plate 10. Between the first bent piece 10a and the second bent piece 10b facing the back edge plate side, facing the back plate 11 side, and the second bent piece 10b facing the left edge side. The right bent portion is configured as a substantially L-shaped bent piece 10c that bends toward the back plate 11 side. Moreover, about the left side bending part of the back surface board 11, it is comprised in the substantially L-shaped bending piece 11a bent toward the surface board 10, and the front-end | tip is a left edge part side about a right side bending part. The first bent piece 11b and the right edge side, which are bent in a folded shape with a predetermined gap between the direction and the back plate 11, facing the front plate 10 side And a second bent piece 10c facing the direction.
[0014]
Further, the upper and lower edges of the front and back plates 10 and 11 are the same as those of the main door 2, and the upper bent portion is formed into L-shaped bent pieces 10d and 11d, while the lower edge is cut off. It is configured.
The front and back plates 10 and 11 include a plurality of aggregates 5 arranged in the vertical direction between them and an aggregate 5 arranged in the horizontal direction in the lower part with a double-sided tape 6. The right edge between the plate surface of the front side second bent piece 10b and the plate end surface of the back side bent piece 11a at the left edge, with the left and right edges and the upper edge facing each other. Between the plate surface of the back surface side second bent piece 11c and the plate end surface of the front surface side bent piece 10c in the portion, between the plate surfaces of the bent pieces 10d and 11d in the upper edge portion, Similarly, the child doors 9 are formed by integrating them by welding with laser beams. At this time, the error in the left-right direction (door width direction) is that the L-shaped bent pieces 10c, 11a are in the left-right width of the front and back plates 10, 11 with respect to the plate surfaces of the second bent pieces 10b, 11c. It is absorbed by adjusting the abutting position of the plate end surface, and the error in the front-rear direction (door thickness direction) adjusts the overlapping amount of the bent pieces 10d, 11d at the upper edge portions of the front and back plates 10, 11. It is set so that it can be absorbed. Note that the error in the vertical direction (door height direction) is the same as that of the main door 2 because no problem occurs in assembly because the lower edge is cut off. Further, in the child door 9, the integrated part with the back surface plate 11 in the right edge portion of the front surface plate 10 is stepped with respect to the front surface plate 10, but the child door 9 is closed together with the main door 2. At this time, the stepped portion 9a is set to face the door stop portion 2a of the main door 2.
[0015]
In the embodiment of the present invention configured as described, the main door 2 and the child door 9 are formed with bent portions at the left and right edge portions and the upper edge portions of the front and back plates 3, 4, 10, 11 respectively. These bent portions are integrated by laser beam welding to form a steel door 1 having a door thickness. In this case, the main door 2 and the child door 9 have a design property that eliminates the need for reinforcement such as providing aggregate at the periphery by laser beam welding and eliminates the need for post-processing of the welding marks. Although it is configured to be high, in this case, the dimensional error in the left-right direction can be absorbed by making the plate end surface of the bent portion abut against the plate surface of the bent portion long in the left-right direction, Further, dimensional errors in the front-rear direction (door thickness direction) can be absorbed by adjusting the overlapping amount of the plate surfaces of the bent portions. As a result, even if a dimensional error occurs in the process of cutting and bending each face plate 3, 4, 10, 11 and aggregate 5, the front and back plates 3, 4, 10, and 11 are bumped. The error can be absorbed at the stage of combining, and there is no problem that a gap is formed between the welded parts of the double-sided plates 3, 4, 10 and 11, and the butt part of the bent parts. Since welding can be carried out, the welding is reliable and strong, and even when the steel door 1 is mass-produced, the occurrence of defective products can be reduced.
In addition, in this case, since the welding structure capable of adjusting the door thickness is formed at the upper edge portion, for example, the dimensional error in the door thickness direction occurring between the left and right edge portions of the front and back plates 3, 4 or 10, 11 is increased. It can be absorbed by adjusting the amount of overlap with the bent pieces 3d, 4c or 10d, 11d at the edge.
[0016]
Further, in the embodiment in which the present invention is implemented, in addition to the adjustment in the door thickness direction, the left and right width direction can also be adjusted, and dimensional errors in both directions can be absorbed. The butt state of 10 and 11 becomes good in each direction, and laser beam welding in the good butt state can be performed, so that more excellent products can be reliably mass-produced.
[0017]
Of course, the present invention is not limited to the first embodiment, and the bent portion is an L-shaped portion, and the L-shaped portion is laminated in a laminated shape to be laser beam welded. It is also possible to have a structure in which the lower edge portion is laminated as an L-shaped portion instead of the upper edge portion of the steel door as in the first embodiment. In this case, the upper edge portion is cut off. It is good also as a shape. Furthermore, in the case where bent portions are provided on the four circumferences of the steel plate and the bent portions on the four circumferences are laser beam welded, both upper and lower edges are formed in an L-shaped portion so that the thickness can be adjusted in the door thickness direction. The upper and lower edge portions can be configured to be laser beam welded, and in any case, these welded portions (integrated portions) are located on the upper and lower end surfaces and are in a blinded state. There is nothing inferior.
[Brief description of the drawings]
FIG. 1 is a front view of a main door.
FIG. 2 is a cross-sectional view of the main door.
FIG. 3 is a longitudinal sectional view of a main door and a child door.
FIG. 4 is a front view of a child door.
FIG. 5 is a cross-sectional view of a child door.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steel door 2 Main door 3 Surface plate 3a Folding piece 3b First bent piece 3c Second bent piece 4 Back plate 5 Aggregate 6 Double-sided tape 9 Child door 10 Front plate 10a First bent piece 10b Second Folded piece 10c Folded piece 11 Back plate

Claims (1)

鋼板からなる表裏一対の面板の少なくとも上および左右三方の周縁部に折曲部を形成し、互いに対向する折曲部同志をレーザービーム溶接して所定のドア厚およびドア幅を有した鋼製ドアを構成するにあたり、鋼製ドアは、周縁部のうち上縁部または下縁部、あるいは上下両縁部の折曲部をそれぞれ対向する表裏面板方向に向けて折曲したL字状のL字状部に形成し、これらL字状部をドア厚調整自在に積層して構成すると共に、鋼製ドアの左右両縁部は、表面板の一方縁部を裏面板方向に向けて折曲したL字状部にし、他方縁部を折り返し状に折曲した折返し状部にし、裏面板の一方縁部を折り返し状に折曲した折返し状部にし、他方縁部を表面板方向に向けて折曲したL字状部にして、それぞれの縁部同士を、L字状部の板端面が折返し状部の板面にドア幅調整自在に突当てられるように構成されている鋼製ドア。 A steel door having a predetermined door thickness and door width by forming a bent portion on at least the upper and left and right peripheral edges of a pair of front and back face plates made of steel plates and laser beam welding the bent portions facing each other. The steel door is formed in an L-shaped L-shape that is bent in the direction of the front and back plates facing the upper or lower edge of the peripheral edge or the bent portions of the upper and lower edges respectively. The L-shaped part is formed by laminating the L-shaped part so that the door thickness can be adjusted, and the left and right edges of the steel door are bent with one edge of the surface plate facing the back plate. L-shaped part, the other edge is folded back, the one side edge of the back plate is folded back, and the other edge is folded toward the surface plate. Turn the L-shaped part into a bent L-shaped part, and the edge of the L-shaped part is folded back Steel doors are configured to be not abutting freely door width adjustment on the plate surface parts.
JP2002341934A 2002-11-26 2002-11-26 Steel door Expired - Lifetime JP3845821B2 (en)

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