JPH0883680A - Radio wave shield device and manufacture thereof - Google Patents

Radio wave shield device and manufacture thereof

Info

Publication number
JPH0883680A
JPH0883680A JP21709794A JP21709794A JPH0883680A JP H0883680 A JPH0883680 A JP H0883680A JP 21709794 A JP21709794 A JP 21709794A JP 21709794 A JP21709794 A JP 21709794A JP H0883680 A JPH0883680 A JP H0883680A
Authority
JP
Japan
Prior art keywords
radio wave
bent
sealing device
door
wave sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21709794A
Other languages
Japanese (ja)
Inventor
Hiroki Kitayama
博樹 北山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP21709794A priority Critical patent/JPH0883680A/en
Publication of JPH0883680A publication Critical patent/JPH0883680A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/763—Microwave radiation seals for doors

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

PURPOSE: To enhance a radio wave shield effect and restrain reduction in the effect due to deformation by eliminating a slit or a groove from the bent piece of a door as radio wave shield measures for the restraint of deformation. CONSTITUTION: A plate material is provided with square holes 6 for inserting a mold to form bent pieces 5, and subjected to pressing and bending processes, thereby forming a radio wave shield device. According to this construction, the bent pieces 5 as important elements for a radio wave shield and regularly arranged, do not need to have a slit or a groove otherwise required at the time of machining, and the radio wave shield effect can be enhanced. Also, reduction in strength can be eliminated, and the deformation of the pieces 5 can be restrained, thereby preventing reduction in the shield effect.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、高周波加熱装置や複
合加熱装置等に用いる、高周波電波を遮蔽する電波シー
ル装置及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave sealing device for shielding high frequency radio waves used in a high frequency heating device, a composite heating device and the like, and a method for manufacturing the same.

【０００２】[0002]

【従来の技術】高周波加熱装置は、高周波により調理物
を誘電加熱して調理するものであり、調理物を収納して
高周波加熱する加熱庫と、この加熱庫の調理物出入用開
口部を開閉自在に覆う扉とを備えている。加熱庫内の高
周波電磁波が庫外に漏洩すると、人体に弊害を及ぼすこ
とから、これを防止するためには、扉を閉めた時に、こ
の加熱庫と扉が完全に密着して間隙が生じないように、
上記密着面を仕上げる必要があるが、ある程度の間隙が
生じることは避けられないのが実情である。したがっ
て、間隙が生じることを前提とした対策として、扉の加
熱庫に接する側の外周全周に亙って電波シール対策が施
されている。2. Description of the Related Art A high-frequency heating device is a device for cooking food by induction heating with high frequency, and a heating cabinet for accommodating the cooking food and heating it in a high-frequency manner, and opening and closing a cooking product entrance / exit opening of the heating cabinet. It has a door that can be freely covered. If high-frequency electromagnetic waves in the heating cabinet leak to the outside of the cabinet, it will have a harmful effect on the human body.To prevent this, when the door is closed, the heating cabinet and the door are in close contact with each other and no gap is created. like,
Although it is necessary to finish the contact surface, it is unavoidable that a certain amount of gap is generated. Therefore, as a measure on the premise that a gap is generated, a radio wave sealing measure is taken over the entire outer circumference of the door in contact with the heating cabinet.

【０００３】従来の電波シール装置を図５乃至図１０と
ともに説明する。A conventional radio wave sealing device will be described with reference to FIGS.

【０００４】図において、２１は扉２２の周縁部に設け
られ、断面溝状に折曲された周縁折曲部、２３は周縁折
曲部２１の先端部に延設され、断面Ｌ字状に２段に折曲
された折り返し部、２４はこの折り返し部２２と周縁折
曲部２１の外側面に亙って形成されたスリットであっ
て、このスリット２４は扉２２の周縁折曲部２１の長手
方向に対し、横方向に多数規則的に形成されている。２
５はこのスリット２４の形成により隔てられて規則的に
配設された多数の折り返し片であり、それぞれの折り返
し片２５の各折曲段部位置には、周縁折曲部２１の長手
方向に向けてそれぞれ長孔２６ａ，２６ｂが夫々設けら
れている。In the figure, reference numeral 21 denotes a peripheral edge portion of the door 22, which is bent in a groove shape in cross section, and 23 extends to the tip of the peripheral edge bent portion 21, and has an L-shaped cross section. A folded-back portion bent in two steps, 24 is a slit formed over the outer surface of the folded-back portion 22 and the peripheral bent portion 21, and the slit 24 is a slit of the peripheral bent portion 21 of the door 22. A large number are regularly formed in the lateral direction with respect to the longitudinal direction. Two
Reference numeral 5 denotes a large number of folded pieces which are regularly arranged with being separated by the formation of the slits 24. The folded piece pieces 25 are oriented in the longitudinal direction of the peripheral bent portion 21 at the respective folding step portions. And elongated holes 26a and 26b are provided respectively.

【０００５】図５は、扉２２を閉じた状態であって、加
熱庫２７と扉２２の周縁の一部を拡大して示している。
図５の扉２２の周縁部２８と加熱庫２７の周縁全面２９
との間には、間隙３０が形成されている。間隙３０の寸
法は理想としては、零であるべきであるが、製作的な面
からは零とはならない場所が生じるものである。したが
って加熱庫２７から、この間隙３０内に入り込む高周波
が、高周波加熱装置の外部に漏洩させない為に、扉２２
の周縁部２８全周に亙って、空洞３１を有するチョーク
部３２が形成されている。FIG. 5 shows a state in which the door 22 is closed, and an enlarged view of a part of the heating chamber 27 and the peripheral edge of the door 22.
The peripheral edge portion 28 of the door 22 and the entire peripheral edge portion 29 of the heating chamber 27 shown in FIG.
A gap 30 is formed between and. The size of the gap 30 should ideally be zero, but from a manufacturing point of view, there are places where it is not zero. Therefore, since the high frequency waves that enter the gap 30 from the heating chamber 27 do not leak to the outside of the high frequency heating device, the door 22
A choke portion 32 having a cavity 31 is formed over the entire circumference of the peripheral edge portion 28.

【０００６】次に、上記の扉２２の電波シール装置の製
造方法を図７乃至図１０に基づいて説明する。Next, a method of manufacturing the radio wave sealing device for the door 22 will be described with reference to FIGS.

【０００７】まず、図７に示すように、材料である板材
３３の周囲に規則的に配設されたスリット２４を介して
多数の突出部３４を規則的に形成する。この各突出部３
４には、外方と内方の２列の横方向長孔２６ａ，２６ｂ
を窄設し（図７，８参照）、各長孔２６ａ，２６ｂの長
手方向両端部には線状の溝３５を形成しておく（図９参
照）。次いで、突出部３４内方の２点鎖線ｃ，ｄ，ｅが
折曲部となるように、板材３３をプレス機等により押圧
し、突出部３４内方の周縁部を断面溝状に折曲成型す
る。First, as shown in FIG. 7, a large number of protrusions 34 are regularly formed through slits 24 which are regularly arranged around a plate material 33 which is a material. Each protrusion 3
4, there are two rows of laterally elongated holes 26a, 26b on the outside and the inside.
(See FIGS. 7 and 8), and linear grooves 35 are formed at both longitudinal ends of the elongated holes 26a and 26b (see FIG. 9). Next, the plate member 33 is pressed by a press or the like so that the two-dot chain lines c, d, and e inside the protrusion 34 are bent, and the peripheral edge inside the protrusion 34 is bent into a groove shape in cross section. Mold.

【０００８】その後、図１０（ａ）に示すように、板材
３３の溝３５が形成されている方の面３６側（図９，１
０の右側）で、かつ２点鎖線ａの真下部に金型３７を配
設し、次いで突出部３４の２点鎖線ａ上方を図中左方か
ら右方に向けて金型３８を介して押圧する。すると、２
点鎖線ａ部即ち、突出部３４の外方の長孔２６ａ部が図
中Ｃ方向に折曲される。Thereafter, as shown in FIG. 10 (a), the surface 36 of the plate member 33 on which the groove 35 is formed (see FIGS. 9 and 1).
0) (right side of 0) and right below the two-dot chain line a, the mold 37 is disposed, and then the upper part of the two-dot chain line a of the protrusion 34 is directed from left to right in the figure through the mold 38. Press. Then 2
The dotted line a portion, that is, the elongated hole 26a portion outside the protruding portion 34 is bent in the C direction in the drawing.

【０００９】次いで、金型３７を除去し、図１０（ｂ）
に示すように、突出部３４の２点鎖線ｂの上方を図中左
方から右方に向けて金型３８を介して押圧する。この時
には面３９側には金型を配設していないが、折曲部に長
孔２６ａと溝３５ａが予め成形されているので、金型３
８による押圧のみで２点鎖線ａ部、即ち内方の長孔２６
ａが矢印Ｄ方向に折曲される。Then, the mold 37 is removed, and FIG.
As shown in, the upper part of the two-dot chain line b of the protrusion 34 is pressed from the left side to the right side in the drawing through the mold 38. At this time, the mold is not arranged on the surface 39 side, but since the elongated hole 26a and the groove 35a are formed in the bent portion in advance, the mold 3
Only by the pressing by 8, the two-dot chain line a part, that is, the inner long hole 26
a is bent in the direction of arrow D.

【００１０】[0010]

【発明が解決しようとする課題】上記のような電波シー
ル装置においては、スリットにより隔てられて規則的に
配設された折り返し片１１の形状精度が電波シール効果
に対して、極めて重要な要素となる。この電波シール装
置の折り返し片の折曲部には、長孔と溝が成形されてい
るので、折り返し片の強度が極めて小さく、加工時や運
搬時の取り扱いによって、曲げ角度が容易に変化する。
この為、電波シール効果が低下し、加熱庫内の高周波電
磁波が庫外に漏洩し、人体に弊害を及ぼすという問題点
があった。In the radio wave sealing device as described above, the shape accuracy of the folded pieces 11 which are regularly arranged by being separated by the slit is an extremely important factor for the radio wave sealing effect. Become. Since the elongated portion and the groove are formed in the bent portion of the folded piece of this radio wave sealing device, the strength of the folded piece is extremely small, and the bending angle easily changes depending on the handling during processing or transportation.
For this reason, there is a problem in that the radio wave sealing effect is reduced, and high-frequency electromagnetic waves inside the heating chamber leak to the outside of the chamber, which adversely affects the human body.

【００１１】[0011]

【課題を解決するための手段】この発明に係る電波シー
ル装置は、開口部が形成され内部に高周波電波が供給さ
れる加熱庫の開口部を開閉自在に覆い、断面溝状に折曲
された周縁折曲部を具備し、この周縁折曲部の先端部に
は断面Ｌ字状に２段に折曲した折り返し片を延設し、こ
の折り返し片には横方向に多数のスリットを設けた１枚
の板材からなる扉であって、上記周縁折曲部の上記スリ
ットに隔てられたそれぞれの折り返し片に対応する位置
に当該折り返し片を折曲する角穴を設けたものである。
そして、上記角穴を高周波電波が漏洩しない大きさに形
成したものである。In a radio wave sealing device according to the present invention, an opening is formed so as to openably and closably cover an opening of a heating chamber in which high frequency radio waves are supplied, and is bent in a groove shape in cross section. A peripheral bent portion is provided, and a folded-back piece bent in two steps in an L-shaped cross section is provided at a tip portion of the peripheral bent portion, and the folded-back piece is provided with a large number of slits in a lateral direction. A door made of a single plate material, in which a rectangular hole for bending the folded piece is provided at a position corresponding to each folded piece separated by the slit of the peripheral bent portion.
The square hole is formed to have a size such that high frequency radio waves do not leak.

【００１２】また、板材の周囲にスリットを介して多数
の突出部を形成し、突出部内側の周縁部に各突出部それ
ぞれに対応するように角穴を設け、上記周縁部を断面溝
状に折曲成型した後、上記角穴に金型を挿入し該金型に
より各突出部を折曲して断面Ｌ字状の折り返し片を周縁
折曲部先端に形成させたものである。Further, a large number of projecting portions are formed around the plate material through slits, and square holes are provided in the peripheral portions inside the projecting portions so as to correspond to the respective projecting portions. After bending and forming, a mold is inserted into the square hole, and each protruding portion is bent by the mold to form a folded piece having an L-shaped cross section at the tip of the peripheral bent portion.

【００１３】[0013]

【作用】この発明においては、折り返し片に長孔や溝な
ど強度低下の要素がなく、加工時や運搬時の取り扱いに
よって、折り返し片の変形がなく、電波シール効果を発
揮できる。According to the present invention, the folding piece does not have a strength reducing element such as a long hole or a groove, and the folding piece is not deformed by handling during processing or transportation, and a radio wave sealing effect can be exhibited.

【００１４】また、突出部内側の周縁部に、各突出部に
それぞれ対応する様に、角穴を設けたことから、この角
穴より金型が入り込み、突出部を容易に折曲することが
できる。Further, since the rectangular hole is provided on the inner peripheral edge of the projecting portion so as to correspond to each projecting portion, the mold can be inserted through the square hole and the projecting portion can be easily bent. it can.

【００１５】[0015]

【実施例】以下、図１乃至図４に基づいて、この発明に
係る電波シール装置の構成の一実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the configuration of a radio wave sealing device according to the present invention will be described below with reference to FIGS.

【００１６】図１，２において、１は、扉２の周縁部に
設けられ断面溝状に折曲（図３のｃ，ｄ，ｅ位置）され
た周縁折曲部であり、３は周縁折曲部１の先端に延設さ
れ、断面Ｌ字状に２段（図３のａ，ｂ位置）に折曲され
た折り返し部であり、４はこの折り返し部３と４周縁折
曲部１の外側面とに亙って形成されたスリットである。
このスリット４は、扉２の周縁折曲部１の長手方向に対
し、横方向に多数規則的に形成されている。５はこのス
リット４の形成により隔てられて規則的に配設された多
数の折り返し片である。６は周縁折曲部１面上に形成さ
れた折曲部ｃに一辺が接し、かつ折り返し片５に対応す
る位置にある角穴である。この角穴６は、下記に示すよ
うに、突出部７を折曲して折り返し片５を形成する為の
金型が入り込む大きささえあれば十分であり、また、高
周波電波が漏洩しない大きさに形成されており、形状
は、図３の角穴６のような長方形でなくてもかまわな
い。In FIGS. 1 and 2, reference numeral 1 denotes a peripheral bent portion which is provided in the peripheral portion of the door 2 and is bent in a groove shape in cross section (positions c, d and e in FIG. 3), and 3 is a peripheral bent portion. Reference numeral 4 denotes a folded-back portion which extends from the tip of the bent portion 1 and is bent in two steps (positions a and b in FIG. 3) in an L-shaped cross section. It is a slit formed over the outer side surface.
The slits 4 are regularly formed in a lateral direction with respect to the longitudinal direction of the peripheral edge bent portion 1 of the door 2. Reference numeral 5 denotes a large number of folded pieces which are regularly arranged with being separated by the formation of the slits 4. Reference numeral 6 denotes a square hole having one side in contact with the bent portion c formed on the surface of the peripheral bent portion 1 and at a position corresponding to the folded piece 5. As shown below, the square hole 6 only needs to have a size into which a mold for bending the protruding portion 7 to form the folded piece 5 is inserted, and has a size that does not allow high-frequency radio waves to leak. It is formed and the shape does not need to be a rectangle like the square hole 6 of FIG.

【００１７】次に、上記の扉２の電波シール装置の製造
方法を図３，４に基づいて説明する。Next, a method of manufacturing the radio wave sealing device for the door 2 will be described with reference to FIGS.

【００１８】まず、図３に示すように、材料である板材
８の周囲に、規則的に配設されたスリット４を介して多
数の突出部７を規則的に形成する。次に、板材８の突出
部７の内方に、各突出部７に対応する位置に角穴６を形
成する。First, as shown in FIG. 3, a large number of protrusions 7 are regularly formed around the plate material 8 through the slits 4 which are regularly arranged. Next, the square holes 6 are formed inside the protrusions 7 of the plate member 8 at positions corresponding to the respective protrusions 7.

【００１９】そして、突出部７の内方の２点鎖線ｃ，
ｄ，ｅ（ｃは、角穴６の外方の一辺と同じ位置）が、折
曲部となるように、板材８をプレス機等により押圧し、
突出部７内方の周縁部を断面溝状に折曲成型する。Then, the two-dot chain line c inside the protrusion 7
d, e (c is the same position as the outer side of the square hole 6) is a bent portion, the plate material 8 is pressed by a pressing machine,
The inner peripheral edge of the projecting portion 7 is bent and formed into a groove shape in cross section.

【００２０】その後、図４（ａ）に示すように、第１金
型９が角穴６を通り抜け、図中下方から上方へ移動し、
第１金型９の先端部が、２点鎖線ａの位置で固定する。
次いで、２点鎖線ａの上方を、図中左方から右方へ第２
金型１０を介して押圧する。すると、突出部７の２点鎖
線ａの位置で、図中矢印Ａ方向に折曲される。Thereafter, as shown in FIG. 4 (a), the first die 9 passes through the square hole 6 and moves from the lower side to the upper side in the figure,
The tip of the first mold 9 is fixed at the position of the chain double-dashed line a.
Next, from the left side to the right side in the figure,
Press through the mold 10. Then, it is bent in the direction of arrow A in the figure at the position of the two-dot chain line a of the protrusion 7.

【００２１】次いで、第１金型９が図中上方から下方へ
移動し、第１金型９の先端部が、２点鎖線ｂの位置で固
定する。次いで、図４（ｂ）に示すように、２点鎖線ｂ
の上方を図中左方へ右へ、第２金型１０を介して押圧す
る。すると、突出部７の２点鎖線ｂの位置で、図中矢印
Ｂ方向に折曲される。このようにして、図１に示すよう
な断面Ｌ字状の折り返し部３が周縁折曲部１先端に形成
されることになる。したがって、１枚の板材８をプレス
加工及び折曲加工することにより、電波シール装置を容
易に製造することができる。Next, the first die 9 moves from the upper side to the lower side in the figure, and the tip of the first die 9 is fixed at the position of the chain double-dashed line b. Then, as shown in FIG. 4B, a two-dot chain line b
Is pressed to the left in the drawing to the right through the second mold 10. Then, it is bent in the direction of the arrow B in the figure at the position of the two-dot chain line b of the protruding portion 7. In this way, the folded portion 3 having an L-shaped cross section as shown in FIG. 1 is formed at the tip of the peripheral bent portion 1. Therefore, the radio wave sealing device can be easily manufactured by pressing and bending one plate member 8.

【００２２】[0022]

【発明の効果】この発明は、上記説明したとおり、周縁
折曲部の先端部の多数のスリットを持つ折り返し片に
は、長孔や溝など強度低下がなく、加工時や運搬時の取
り扱いによって折り返し片の変形を防止し、しかも、構
造が簡単でかつ高性能な電波シール効果を有する電波シ
ール装置を得ることができるという効果がある。As described above, according to the present invention, the folding piece having a large number of slits at the tip of the peripheral bent portion does not have strength reduction such as long holes and grooves, and is easy to handle during processing or transportation. There is an effect that it is possible to obtain a radio wave sealing device having a simple structure and a high performance radio wave sealing effect, which prevents deformation of the folded piece.

【００２３】また、突出部内側の周縁部に各突出部に、
それぞれ対応するように角穴を設けたことによって、こ
の角穴より金型が入り込み、突出部を容易に折曲するこ
とができることになり、１枚の板材から、電波シール装
置を容易に製造することができるという効果がある。In addition, at each of the protrusions on the inner peripheral edge of the protrusion,
Since the square holes are provided so as to correspond to each other, the mold can be inserted through the square holes and the projecting portion can be easily bent, and the radio wave sealing device can be easily manufactured from one plate material. The effect is that you can.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の扉と加熱庫の周縁の一部を示した断面
図である。FIG. 1 is a cross-sectional view showing a part of the periphery of a door and a heating chamber of the present invention.

【図２】本発明の扉の一部を示す斜視図である。FIG. 2 is a perspective view showing a part of the door of the present invention.

【図３】本発明の扉の材料の板材周囲の一部を示す詳細
図である。FIG. 3 is a detailed view showing a part of the periphery of the plate material of the door material of the present invention.

【図４】本発明の電波シール装置の製造方法を示す説明
図である。FIG. 4 is an explanatory view showing a method of manufacturing the radio wave sealing device of the present invention.

【図５】従来の扉と加熱庫の周縁の一部を示した断面図
である。FIG. 5 is a cross-sectional view showing a part of peripheral edges of a conventional door and a heating chamber.

【図６】従来の扉の一部を示す斜視図である。FIG. 6 is a perspective view showing a part of a conventional door.

【図７】本発明の扉の材料の板材周囲の一部を示す詳細
図である。FIG. 7 is a detailed view showing a part around the plate material of the door material of the present invention.

【図８】図７のＹ−Ｙ断面図である。8 is a cross-sectional view taken along line YY of FIG.

【図９】図７のＸ−Ｘ断面図である。9 is a cross-sectional view taken along line XX of FIG.

【図１０】従来の電波シール装置の製造方法を示す説明
図である。FIG. 10 is an explanatory view showing a method of manufacturing a conventional radio wave sealing device.

【符号の説明】[Explanation of symbols]

１ 周縁折曲部 ２ 扉 ３ 折り返し部 ４ スリット ５ 折り返し片 ６ 角穴 ７ 突出部 ８ 板材 ９ 第１金型 １０ 第２金型 １１ 折り返し片 １２ 長孔 1 Peripheral bent part 2 Door 3 Folded part 4 Slit 5 Folded piece 6 Square hole 7 Projection part 8 Plate material 9 1st die 10 2nd die 11 Folded piece 12 Long hole

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 開口部が形成され内部に高周波電波が供
給される加熱庫の開口部を開閉自在に覆い、断面溝状に
折曲された周縁折曲部を具備し、この周縁折曲部の先端
部には断面Ｌ字状に２段に折曲した折り返し片を延設
し、この折り返し片には横方向に多数のスリットを設け
た１枚の板材からなる扉の電波シール装置において、上
記周縁折曲部の上記スリットにより隔てられたそれぞれ
の折り返し片に対応する位置に当該折り返し片を折曲す
る金型を挿入する角穴を設けたことを特徴とする電波シ
ール装置。1. A peripheral edge bent portion, which has an opening formed therein, covers the opening of a heating chamber to which high-frequency radio waves are supplied and which can be opened and closed, and is bent in a groove shape in cross section. In a radio wave sealing device for a door, which is formed by a single plate member having a folded piece that is bent in two steps in an L-shaped cross section and is provided with a number of slits in the lateral direction, A radio wave sealing device, characterized in that a square hole into which a die for bending the folded piece is inserted is provided at a position corresponding to each folded piece separated by the slit of the peripheral bent portion. 【請求項２】 上記角穴を高周波電波が漏洩しない大き
さに形成したことを特徴とする請求項１記載の電波シー
ル装置。2. The radio wave sealing device according to claim 1, wherein the square hole is formed in such a size that high frequency radio waves do not leak. 【請求項３】 板材の周囲にスリットを介して多数の突
出部を形成し、突出部内側の周縁部に、各突出部それぞ
れに対応するように角穴を設け、上記周縁部を断面溝状
に折曲成型した後、上記角穴に金型を挿入し該金型によ
り各突出部を折曲して断面Ｌ字状の折り返し片を周縁折
曲部先端に形成させたことを特徴とする電波シール装置
の製造方法。3. A plurality of projecting portions are formed around a plate material through slits, and square holes are provided in the peripheral edge portion inside the projecting portion so as to correspond to the respective projecting portions, and the peripheral edge portion is grooved in cross section. After being bent and molded into a rectangular shape, a mold is inserted into the square hole, and each protrusion is bent by the mold to form a folded piece having an L-shaped cross section at the tip of the peripheral bent portion. Manufacturing method of radio wave sealing device.
JP21709794A 1994-09-12 1994-09-12 Radio wave shield device and manufacture thereof Pending JPH0883680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21709794A JPH0883680A (en) 1994-09-12 1994-09-12 Radio wave shield device and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21709794A JPH0883680A (en) 1994-09-12 1994-09-12 Radio wave shield device and manufacture thereof

Publications (1)

Publication Number Publication Date
JPH0883680A true JPH0883680A (en) 1996-03-26

Family

ID=16698802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21709794A Pending JPH0883680A (en) 1994-09-12 1994-09-12 Radio wave shield device and manufacture thereof

Country Status (1)

Country Link
JP (1) JPH0883680A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003046288A (en) * 2001-08-02 2003-02-14 Matsushita Electric Ind Co Ltd Electromagnetic wave shielding device and electronic oven
JP2003046289A (en) * 2001-08-02 2003-02-14 Matsushita Electric Ind Co Ltd Electromagnetic wave shielding device and electronic oven
JP2015153636A (en) * 2014-02-17 2015-08-24 株式会社日立産機システム circuit breaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003046288A (en) * 2001-08-02 2003-02-14 Matsushita Electric Ind Co Ltd Electromagnetic wave shielding device and electronic oven
JP2003046289A (en) * 2001-08-02 2003-02-14 Matsushita Electric Ind Co Ltd Electromagnetic wave shielding device and electronic oven
JP2015153636A (en) * 2014-02-17 2015-08-24 株式会社日立産機システム circuit breaker

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