JPH09126696A - Electric detonator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric detonator which can prevent the accidental discharge caused by electrostatic induction and to guarantee sealing and low cost at high air permeability and to facilitate the manufacture. SOLUTION: A metal end plate 5 having a first lead pin insertion port 51 for one of a pair of lead pins 31, 32 and a second lead pin insertion port 52 for the other pin 32 is disposed in the state that the pins 31, 32 are respectively inserted into the ports 51, 52 at the lower surface of a plug 1, and the port 51 is sealed to the pin 31 inserted into the port 51 by welding 61. The port 52 is sealed from the pin 32 inserted into the port 52 by insulation sealer 62. The plug 1 is covered with a metal cylinder 7 with a bottom containing igniting explosive powder 71, and the periphery of the plate 5 is sealed to the opening of the cylinder 7 by welding 63.

Description

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

【０００１】[0001]

【発明の属する技術分野】本発明は電気***に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric detonator.

【０００２】[0002]

【従来の技術】***作業に用いる電気***、コンクリ−
トの破砕器の電気***、自動車用エアバックの電気***
等として、絶縁栓体に一対のリ−ドピンを貫設し、これ
らリ−ドピンの先端間に電橋線を接続し、着火薬を収納
した有底金属筒を前記の栓体で封止し、作動電流による
電橋線の通電発熱で着火薬を点火させると同時に有底金
属筒を破裂させるものが公知である。この電気***にお
いては、使用条件の如何によっては、静電誘導のために
リ−ドピンと有底金属筒との間に電位差が発生し、何れ
か一方のリ−ドピンと有底金属筒間に栓体表面に沿って
放電が生じ、その結果、両リ−ドピンの有底金属筒に対
する電位がアンバランスになって両リ−ドピン間に電位
差が発生し、この電位差のために電橋線に電流が流れて
暴発する畏れがある。2. Description of the Related Art Electric detonators and concrete used for blasting operations
As an electric detonator of a crusher for automobiles, an electric detonator of an automobile airbag, etc. It is known that a bottomed metal cylinder is sealed with the above-mentioned plug body, and the ignition powder is ignited by the energization and heat generation of the bridge wire by an operating current, and at the same time the bottomed metal cylinder is ruptured. In this electric detonator, a potential difference is generated between the lead pin and the bottomed metal cylinder due to electrostatic induction depending on the usage conditions, and between any one of the lead pins and the bottomed metal cylinder. Discharge occurs along the surface of the plug body, and as a result, the potential of both lead pins with respect to the bottomed metal cylinder becomes unbalanced, and a potential difference occurs between the lead pins. There is a fear that current will flow and it will explode.

【０００３】そこで、従来、図２に示すように、絶縁栓
体１’に一対のリ−ドピン３１’，３２’を貫設し、こ
れらリ−ドピンの先端間に電橋線４’を接続し、短絡用
金属筒５’を栓体１’の一端に配し、該短絡用金属筒
５’内への封着ガラス等の封止剤６２’の充填により、
リ−ドピン３１’（３２’）と栓体１’と短絡用金属筒
５’との相互間を封止し、一方のリ−ドピン３１’と短
絡用金属筒５’のリ−ド部５１’とを溶接し（符号６
１’で示されている）、栓体１’を着火薬７１’を収納
した有底薄肉金属筒７’内に挿入し、有底金属筒７’と
短絡用金属筒５’との間を溶接６３’により封止した電
気***が提案されている（実用新案登録第３００５７５
３号）。Therefore, conventionally, as shown in FIG. 2, a pair of lead pins 31 'and 32' are provided through an insulating plug 1'and a bridge wire 4'is connected between the tips of these lead pins. Then, the short-circuiting metal cylinder 5 ′ is arranged at one end of the plug 1 ′, and the short-circuiting metal cylinder 5 ′ is filled with the sealant 62 ′ such as sealing glass,
The lead pin 31 '(32'), the plug 1 ', and the short-circuiting metal cylinder 5'are sealed together, and the lead pin 31' and the lead portion 51 of the short-circuiting metal cylinder 5'are sealed. 'And welding (6
1 '), the plug 1'is inserted into the bottomed thin-walled metal cylinder 7'containing the ignition powder 71', and the space between the bottomed metal cylinder 7'and the short-circuiting metal cylinder 5'is An electric detonator sealed by welding 63 'has been proposed (utility model registration No. 300575).
No. 3).

【０００４】この電気***においては、両リ−ドピン３
１’，３２’が電橋線４’で電気的に導通され、有底金
属筒７’と一方のリ−ドピン３１’との間が、有底金属
筒７’と短絡用金属筒５’との間の溶接６３’及び短絡
用金属筒５’のリ−ド５１’と一方のリ−ドピン３１’
との溶接６１’により電気的に導通されているから、静
電作用に曝されても、両リ−ドピン３１’，３２’と有
底金属筒７’との間での電位差の発生を防止し得る。従
って、この電位差が発生するときに懸念される放電に基
づく電気***の暴発を排除できる。In this electric detonator, both lead pins 3
1'and 32 'are electrically connected by a bridge wire 4', and the bottomed metal cylinder 7'and the short-circuited metal cylinder 5'between the bottomed metal cylinder 7'and one lead pin 31 '. Welding 63 'between the lead 63' and the lead 51 'of the short-circuiting metal cylinder 5'and one lead pin 31'.
Since it is electrically conducted by welding 61 ′ with, it prevents the occurrence of a potential difference between both lead pins 31 ′, 32 ′ and the bottomed metal cylinder 7 ′ even when exposed to electrostatic action. You can Therefore, it is possible to eliminate the sudden discharge of the electric detonator due to the electric discharge which is concerned when the potential difference occurs.

【０００５】上記電気***においては、封止（着火薬の
吸湿防止のために高度な気密性が要求される）を短絡用
金属筒５’内への封着ガラス６２’の充填及び短絡用金
属筒５’と有底金属筒７’との間の溶接６３’に依存
し、短絡のための電気的導通を短絡用金属筒５’と有底
金属筒７’との間の溶接６３’及び短絡用金属筒５’の
リ−ド５１’とリ−ドピン３１’との溶接６１’に依存
している。In the above electric detonator, sealing (high airtightness is required to prevent moisture absorption of the ignition powder) is filled with the sealing glass 62 'in the short-circuiting metal tube 5'and the short-circuiting metal is filled. Depending on the welding 63 'between the tube 5'and the bottomed metal tube 7', the electrical conduction for a short circuit is prevented by the welding 63 'between the shorting metal tube 5'and the bottomed metal tube 7'. It depends on the welding 61 ′ between the lead 51 ′ of the short-circuiting metal cylinder 5 ′ and the lead pin 31 ′.

【０００６】[0006]

【発明が解決しようとする課題】しかしながら、短絡用
金属筒５’内への封着ガラス６２’の充填においては、
短絡用金属筒５’の内径が栓体１’の端部を内包する相
当に大きな寸法であり、使用ガラス量が多く、かかるも
とではガラス固化時の冷却の不均一がそれだけ著しくな
り、内部残留応力が大となり、封着ガラス６２’のクラ
ック発生の危険性がそれだけ増大する。また、ガラス使
用量が多いために、コスト的にも高くつく。However, in filling the sealing glass 62 'into the short-circuiting metal cylinder 5',
The inner diameter of the short-circuiting metal cylinder 5'is a considerably large size that encloses the end portion of the plug 1 ', and a large amount of glass is used. Under such circumstances, uneven cooling during glass solidification becomes remarkable, and The residual stress becomes large, and the risk of cracking of the sealing glass 62 'increases accordingly. In addition, since the amount of glass used is large, the cost is high.

【０００７】更に、上記の溶接においては、部材の寸法
が小であるために（栓体外径は７ｍｍ程度、リ−ドピン
の外径は１ｍｍ程度）、加熱スポットのサイズを光学的
に高精度でコントロ−ルでき、微小部位の溶接に有利な
レ−ザ溶接を使用することが望まれるが、短絡用金属筒
５’のリ−ド５１’とリ−ドピン３１’とをレ−ザ溶接
すると、溶接箇所６１’に照射されたレ−ザビ−ムが封
着ガラス６２’表面に入射してそのガラス表面が損傷さ
れる畏れがある。或いは、封着ガラス６２’の充填前
に、そのレ−ザ溶接を行う場合は、栓体１’を傷付ける
畏れがある。Further, in the above-mentioned welding, the size of the member is small (outer diameter of the plug body is about 7 mm, outer diameter of the lead pin is about 1 mm). It is desirable to use laser welding which is controllable and advantageous for welding minute parts. However, when the lead 51 'and the lead pin 31' of the short-circuiting metal cylinder 5'are laser-welded. However, there is a fear that the laser beam irradiated on the welded portion 61 'is incident on the surface of the sealing glass 62' and the glass surface is damaged. Alternatively, when the laser welding is performed before filling the sealing glass 62 ′, there is a fear of damaging the stopper 1 ′.

【０００８】本発明の目的は、静電誘導に起因する暴発
の防止、高気密性での封止、低コスト等を保証でき、製
作も容易である電気***を提供することにある。It is an object of the present invention to provide an electric detonator which can prevent outbursts caused by electrostatic induction, can ensure high airtight sealing, can be manufactured at low cost, and is easy to manufacture.

【０００９】[0009]

【課題を解決するための手段】本発明に係る電気***
は、絶縁栓体に一対のリ−ドピンが貫設され、該栓体の
一端側においてリ−ドピン間に電橋線が接続され、上記
一対のリ−ドピンの一方のリ−ドピンに対する第１リ−
ドピン挿通口と他方のリ−ドピンに対する第２リ−ドピ
ン挿通口とを有する金属端板が上記栓体の他端側に各リ
−ドピン挿通口に各リ−ドピンが挿通された状態で配設
され、上記第１リ−ドピン挿通口とその挿通されたリ−
ドピンとの間が溶接により封止され、上記第２リ−ドピ
ン挿通口とその挿通されたリ−ドピンとの間が絶縁封止
剤により封止され、着火薬が収納された有底金属筒が上
記栓体上に被せられ、上記金属端板の周囲が上記有底金
属筒の開口に溶接により封止されていることを特徴とす
る構成であり、金属端板周囲にスカ−ト部を設け、該ス
カ−ト部を有底金属筒の開口に溶接により封止すること
が好ましく、更に、各リ−ドピンに皿形頭部を設け、そ
のリ−ドピン頭部を受容するリ−ドピン挿通口をテ−パ
孔とし、各テ−パ孔と皿形頭部との間を封止剤で封止す
ることが好ましい。In an electric detonator according to the present invention, a pair of lead pins are provided through an insulating plug, and a bridge wire is connected between the lead pins at one end of the plug. A first lead for one lead pin of the pair of lead pins
A metal end plate having a lead pin insertion port and a second lead pin insertion port for the other lead pin is arranged at the other end of the plug body with each lead pin inserted in each lead pin insertion port. The first lead pin insertion opening and the lead inserted therethrough.
A bottomed metal cylinder in which an ignition agent is housed is sealed by welding between the lead pin and the second lead pin insertion port and the lead pin inserted through the second lead pin insertion port. Is covered on the plug body, and the periphery of the metal end plate is sealed by welding in the opening of the bottomed metal cylinder, and a skirt portion is provided around the metal end plate. It is preferable that the skirt portion is provided and the skirt portion is sealed in the opening of the bottomed metal cylinder by welding. Further, each lead pin is provided with a dish-shaped head, and the lead pin receives the lead pin head. It is preferable that the insertion port is a taper hole and a space between each taper hole and the dish-shaped head is sealed with a sealant.

【００１０】[0010]

【発明の実施の形態】以下、図面を参照しつつ本発明の
実施の形態について説明する。図１の（イ）は本発明に
係る電気***の一例を示す断面図、図１の（ロ）は図１
の（イ）におけるロ−ロ断面図である。図１の（イ）及
び図１の（ロ）において、１は絶縁栓体であり、一対の
リ−ドピン挿通孔２１，２１が穿孔され、各挿通孔の口
部がテ−パ孔２２，２２とされている。この絶縁栓体１
には、通常セラミックスが使用される。３１，３２は一
対のリ−ドピンであり、皿形頭部３３を有し、各リ−ド
ピン３１，３２が栓体１のリ−ドピン挿通孔２１，２１
に挿通され、各皿形頭部３３が上記の各テ−パ孔２２に
受容されている。この皿形頭部３３とテ−パ孔２２との
間は、封着ガラスやエポキシ樹脂等の封止剤３４で封止
・固定することが好ましい。Embodiments of the present invention will be described below with reference to the drawings. 1A is a cross-sectional view showing an example of the electric detonator according to the present invention, and FIG. 1B is FIG.
FIG. In FIG. 1A and FIG. 1B, 1 is an insulating plug, and a pair of lead pin insertion holes 21 and 21 are bored, and the mouth of each insertion hole is a taper hole 22, It is supposed to be 22. This insulation plug 1
For this, ceramics are usually used. Reference numerals 31 and 32 are a pair of lead pins, each of which has a dish-shaped head 33, and each of the lead pins 31 and 32 has a lead pin insertion hole 21 or 21 of the plug body 1.
, And each dish-shaped head 33 is received in each taper hole 22. The space between the dish-shaped head 33 and the taper hole 22 is preferably sealed and fixed with a sealant 34 such as sealing glass or epoxy resin.

【００１１】４は電橋線であり、栓体１の一端側におい
てリ−ドピン３１，３２間に溶接により接続されてい
る。この電橋線４には通常、鉄、ニッケル、モリブデ
ン、白金、タングステン、タンタル等の単体金属、ニッ
ケル−クロム系、鉄−クロム−アルミニウム系等の合金
が使用される。上記のリ−ドピン３１，３２には、電橋
線４との溶接が容易で、かつ栓体１とのガラス等の封止
剤による封止が容易な材質（特に、封止剤と熱膨張・収
縮係数が等しい材質）、例えば、鉄、ニッケル、銅等の
単体金属、ニッケル−鉄系等の合金が使用される。Reference numeral 4 denotes a bridge wire, which is connected by welding between the lead pins 31 and 32 on one end side of the plug body 1. For the bridge wire 4, a simple metal such as iron, nickel, molybdenum, platinum, tungsten, tantalum, etc., or an alloy of nickel-chromium, iron-chromium-aluminum, etc. is usually used. The lead pins 31 and 32 are made of a material that can be easily welded to the bridge wire 4 and can be easily sealed with the plug 1 by a sealing agent such as glass (in particular, the sealing agent and the thermal expansion). -Materials having the same shrinkage coefficient), for example, simple metals such as iron, nickel and copper, and nickel-iron alloys are used.

【００１２】５は金属端板であり、上記一対のリ−ドピ
ンの一方のリ−ドピン３１に対するリ−ドピン外径にほ
ぼ等しい内径の第１リ−ドピン挿通口５１と他方のリ−
ドピン３２に対するリ−ドピン外径よりも大なる内径の
第２リ−ドピン挿通口５２とを有する円板部５０及び円
板部５０周囲のスカ−ト部５３からなり、リ−ドピン３
１，３２に挿通された状態で栓体１の下端に配設されて
いる。この金属端板５はリ−ドピン外径よりも大なる内
径の同じボス付きリ−ドピン挿通口を２つ設けたものを
使用してもよい。この場合、溶接前あるいは溶接時に片
方のボス先端をリ−ドピン外径にほぼ等しく絞り、溶接
すればよい。６１は金属端板５の第１リ−ドピン挿通口
５１とリ−ドピン３１との間の溶接部であり、リ−ドピ
ン３１の全周に沿う溶接であって、電気的導通と共に封
止が確保されている。６２は金属端板５の第２リ−ドピ
ン挿通口５２とリ−ドピン３２との間に充填された絶縁
封止剤、例えば、封着ガラス、エポキシ樹脂等であり、
金属端板５とリ−ドピン３２との相互間が封止されてい
ると共に金属端板５とリ−ドピン３２との間の絶縁が確
保されている。なお、金属端板５には、ガラス等の封止
剤による上記の封止６２が容易な材質、例えば、鉄、ニ
ッケル、銅等の単体金属、ニッケル−鉄系等の合金が使
用される。７は底部に着火薬７１が収納された薄肉の有
底金属筒であり、上記の栓体１が挿入され、有底金属筒
７の開口７２と金属端板５周囲のスカ−ト部５３とが全
周に沿い溶接（符号６３で示されている）されて電気的
導通と共に封止が確保されている。有底金属筒には、例
えば、銅やアルミニウム等の軟質の導電性金属が使用さ
れる。Reference numeral 5 denotes a metal end plate, which has a first lead pin insertion opening 51 having an inner diameter substantially equal to the outer diameter of the lead pin for one lead pin 31 of the pair of lead pins and the other lead pin.
The lead pin 3 includes a disc portion 50 having a second lead pin insertion opening 52 having an inner diameter larger than the lead pin outer diameter with respect to the lead pin 32, and a skirt portion 53 around the disc portion 50.
It is arranged at the lower end of the plug body 1 in a state of being inserted into the plugs 1, 32. The metal end plate 5 may be provided with two bossed lead pin insertion holes having the same inner diameter larger than the outer diameter of the lead pin. In this case, before or during welding, the tip of one of the bosses may be squeezed to be approximately equal to the outer diameter of the lead pin and then welded. Reference numeral 61 denotes a welded portion between the first lead pin insertion opening 51 and the lead pin 31 of the metal end plate 5, which is a weld along the entire circumference of the lead pin 31 and is electrically conductive and sealed. Has been secured. Reference numeral 62 denotes an insulating sealant filled between the second lead pin insertion opening 52 of the metal end plate 5 and the lead pin 32, such as sealing glass or epoxy resin.
The metal end plate 5 and the lead pin 32 are sealed together, and the insulation between the metal end plate 5 and the lead pin 32 is ensured. The metal end plate 5 is made of a material that facilitates the above-described sealing 62 with a sealing agent such as glass, for example, a single metal such as iron, nickel, or copper, or an alloy of nickel-iron system. Reference numeral 7 is a thin-walled bottomed metal cylinder having an ignition charge 71 stored in the bottom, into which the plug 1 is inserted, and an opening 72 of the bottomed metal cylinder 7 and a skirt 53 around the metal end plate 5. Are welded along the entire circumference (indicated by reference numeral 63) to ensure electrical conduction and sealing. For the bottomed metal cylinder, for example, a soft conductive metal such as copper or aluminum is used.

【００１３】上記において、電気***の封止性は、溶接
部６１及び６３と封止剤充填部６２とにより保証されて
いるから、リ−ドピン頭部２２，２２の封止は補助的と
し、リ−ドピン３１，３２を栓体１に仮固定できる程度
のものとしてもよい。In the above, since the sealing performance of the electric detonator is guaranteed by the welded portions 61 and 63 and the sealant filling portion 62, the lead pin heads 22 and 22 are sealed auxiliary. The lead pins 31 and 32 may be temporarily fixed to the stopper 1.

【００１４】上記電気***の製作にあたっては、まず、
栓体１にリ−ドピン３１，３２を挿通したのち、各リ−
ドピン３１，３２の頭部３３，３３をリ−ドピン挿通孔
の口部２２，２２に封止・固定し（或いは、固定のみを
行い）、次いで、栓体１の下端に金属端板５を固定す
る。この金属端板５の固定においては、リ−ドピン３１
と第１リ−ドピン挿通口５１との溶接６１を先に行い、
この溶接後に、第２リ−ドピン挿通口５２への絶縁封止
剤６２の充填を行うことが、絶縁封止剤６２の万一の溶
接熱による劣化を防止するうえにおいて有利である。ま
た、リ−ドピン３１と第１リ−ドピン挿通口５１との溶
接６１には、リ−ドピン３１の外径が細いので（１．０
ｍｍ程度）、加熱スポットのサイズを光学的に高精度で
コントロ−ルできるレ−ザ溶接を使用することが望まし
い。In manufacturing the above electric detonator, first,
After inserting the lead pins 31 and 32 into the stopper body 1,
The head portions 33, 33 of the lead pins 31, 32 are sealed and fixed (or only fixed) to the mouth portions 22, 22 of the lead pin insertion hole, and then the metal end plate 5 is attached to the lower end of the plug body 1. Fix it. In fixing the metal end plate 5, the lead pin 31 is used.
And the first lead pin insertion opening 51 are welded 61 first,
It is advantageous to fill the second lead pin insertion port 52 with the insulating sealant 62 after this welding in order to prevent the insulating sealant 62 from deteriorating due to welding heat. In addition, since the outer diameter of the lead pin 31 is small in the welding 61 between the lead pin 31 and the first lead pin insertion port 51 (1.0
It is desirable to use laser welding which can optically control the size of the heating spot with high precision.

【００１５】上記リ−ドピン３１，３２間への電橋線４
の接続には、リ−ドピン頭部２２，２２の栓体１への封
止固定後（固定のみを行う場合は、固定後）、または金
属端板５の固定後に行い、その接続には、抵抗溶接法を
使用することが好ましい。この抵抗溶接の際、溶接電極
がリ−ドピン頭部縁端外の電橋線部分に接しても、その
電橋線部分の圧潰薄肉化を防止するために、図１の
（イ）に示すように、皿形頭部３３の周囲に等厚縁部３
５（厚みは０．１ｍｍ〜０．４ｍｍ程度）を設け、この
厚み分だけ、抵抗溶接時に電橋線４の直下に隙間を保つ
ことが好ましい。上記金属端板５周囲のスカ−ト部５３
と有底金属筒７の開口７２との間の溶接６３もレ−ザ溶
接とすることが好ましい。Bridge line 4 between the lead pins 31 and 32
Connection is made after sealing and fixing the lead pin heads 22 and 22 to the plug body 1 (after fixing when only fixing is performed) or after fixing the metal end plate 5. It is preferred to use the resistance welding method. In this resistance welding, even if the welding electrode contacts the bridge wire portion outside the edge of the lead pin head, it is shown in (a) of FIG. 1 in order to prevent the collapse and thinning of the bridge wire portion. As shown in FIG.
5 (thickness is about 0.1 mm to 0.4 mm), and it is preferable to maintain a gap just below the bridge wire 4 during resistance welding by this thickness. The skirt portion 53 around the metal end plate 5
It is preferable that the welding 63 between the opening and the opening 72 of the bottomed metal cylinder 7 is also laser welding.

【００１６】本発明に係る電気***においては、電橋線
４で電気的に導通された一対のリ−ドピン３１，３２の
一方３１が、両リ−ドピンを包囲する有底金属筒７に金
属端板５を介して電気的に導通されているから、何れの
リ−ドピン３１，３２をも常に有底金属筒７に対し実質
的に同電位に保ち得、有底金属筒７と各リ−ドピン３
１，３２間での放電を排除でき、この放電が発生する場
合に懸念される電気***の暴発を回避できる。In the electric detonator according to the present invention, one of the pair of lead pins 31, 32 electrically connected by the bridge wire 4 is made of metal in the bottomed metal cylinder 7 surrounding both lead pins. Since the lead pins 31 and 32 are electrically connected to each other through the end plate 5, the lead pins 31 and 32 can be kept at substantially the same potential as the bottomed metal cylinder 7 at all times. -Dopin 3
It is possible to eliminate the discharge between 1 and 32, and to avoid the sudden explosion of the electric detonator which is a concern when this discharge occurs.

【００１７】また、溶接箇所が２ヵ所（６１，６３）で
あり、封止剤の充填が１ヵ所（６２）である点は、図２
に示した従来の電気***と共通しているが、封止剤６
２の量を従来例よりも少なくできるから、封止剤固化時
での冷却を充分一様に行なわせることができ、それだけ
残留応力をよく減少でき、固化封止剤のクラック発生の
危険性を低減できる。また、使用封止剤量の減少による
低コスト化を達成できる、金属端板５の第１リ−ドピ
ン挿通口５１とリ−ドピン３１との溶接６１をレ−ザ溶
接により行っても、その溶接箇所に対し封止剤６２によ
る封止箇所がレ−ザビ−ムの方向線上から外れているか
ら、封止剤６２の損傷、または封止前の栓体露出面の傷
付を回避できる、等の利点がある。Further, FIG. 2 shows that there are two welding points (61, 63) and one filling point of the sealant (62).
Although it is common with the conventional electric detonator shown in, the sealant 6
Since the amount of 2 can be made smaller than that of the conventional example, the cooling at the time of solidifying the sealant can be performed sufficiently uniformly, the residual stress can be reduced accordingly, and the risk of cracking of the solidified sealant can be reduced. It can be reduced. Further, even if the welding 61 of the first lead pin insertion opening 51 of the metal end plate 5 and the lead pin 31 which can achieve cost reduction by reducing the amount of the used sealant is performed by laser welding, Since the sealing portion with the sealing agent 62 deviates from the direction line of the laser beam with respect to the welded portion, damage to the sealing agent 62 or damage to the exposed surface of the plug body before sealing can be avoided. And so on.

【００１８】更に、本発明に係る電気***においては、
金属端板５の周囲にスカ−ト部５３を形成し、有底金属
筒７の開口７２との溶接をそのスカ−ト部５３の端部で
行うことにより、この溶接箇所６３と前記封止剤６２に
よる封止箇所との間を充分に隔離でき、当該溶接箇所６
３の溶接時の熱からその封止剤６２を熱的に保護でき
る。更にまた、本発明に係る電気***においては、一方
のリ−ドピン３１に対する封止を溶接部６１以外にリ−
ドピン３１の頭部３３でも行って二重に封止にでき、他
方のリ−ドピン３２に対する封止を封止剤６２による以
外にリ−ドピン３２の頭部３３でも行って二重に封止に
でき、しかも、それらのリ−ドピン頭部３３の封止が、
当該頭部３３のテ−パ裏面とテ−パ孔２２との間への封
止剤３４の充填により行われており、そのテ−パのため
に気泡をよく逃がし得るから、高度の安定な封止性を保
証できる。Further, in the electric detonator according to the present invention,
By forming the skirt portion 53 around the metal end plate 5 and performing welding with the opening 72 of the bottomed metal cylinder 7 at the end portion of the skirt portion 53, the welded portion 63 and the sealing are formed. The welded portion 6 can be sufficiently isolated from the portion sealed with the agent 62.
The sealant 62 can be thermally protected from the heat generated when welding No. 3 is welded. Furthermore, in the electric detonator according to the present invention, the sealing for one of the lead pins 31 is performed except for the welded portion 61.
The head 33 of the lead pin 31 can also be double-sealed, and the other lead pin 32 can be sealed by the head 33 of the lead pin 32 in addition to the sealing agent 62. And the sealing of the lead pin heads 33 is
This is performed by filling the sealant 34 between the taper back surface of the head 33 and the taper hole 22, and bubbles can be well escaped due to the taper, so that highly stable. The sealing property can be guaranteed.

【００１９】[0019]

【発明の効果】本発明に係る電気***においては、静電
誘導に起因する暴発の防止のために有底金属筒と一方の
リ−ドピンとを電気的に導通する短絡部材を、一対のリ
−ドピンの一方のリ−ドピンに対する第１リ−ドピン挿
通口と他方のリ−ドピンに対する第２リ−ドピン挿通口
とを有する金属端板で構成し、第１リ−ドピン挿通口と
その挿通リ−ドピンとを溶接し、第２リ−ドピン挿通口
とその挿通リ−ドピンとの間に絶縁封止剤を充填してお
り、絶縁封止剤の使用量を少なくできるから、当該封止
剤の冷却固化時での残量応力の発生を抑制して優れた封
止性を保証でき、かつ、封止剤の使用量の減少による低
コスト化を図ることができる。更に、高密度、高エネル
ギ−のレ−ザ溶接を使用しても、封止剤または封止前の
露出栓体面へのレ−ザの入射を確実に回避でき、レ−ザ
溶接を容易に安全に行うことができる。In the electric detonator according to the present invention, in order to prevent the explosion caused by electrostatic induction, a short-circuit member electrically connecting the bottomed metal cylinder and one lead pin is provided with a pair of lead wires. -A metal end plate having a first lead pin insertion opening for one lead pin of the lead pin and a second lead pin insertion opening for the other lead pin, and the first lead pin insertion opening and its insertion Since the lead pin is welded and the insulating sealant is filled between the second lead pin insertion port and the insertion lead pin, the amount of the insulating sealant used can be reduced. It is possible to suppress the generation of residual stress during cooling and solidification of the agent, ensure excellent sealing performance, and reduce the cost by reducing the amount of the sealing agent used. Furthermore, even if high-density, high-energy laser welding is used, it is possible to surely prevent the laser from entering the sealant or the exposed plug body surface before sealing, thus facilitating the laser welding. You can do it safely.

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

【図１】図１の（イ）は本発明に係る電気***を示す断
面図、図１の（ロ）は図１の（イ）におけるロ−ロ断面
図である。1A is a cross-sectional view showing an electric detonator according to the present invention, and FIG. 1B is a cross-sectional view taken along line A-B in FIG.

【図２】従来の電気***を示す断面図である。FIG. 2 is a sectional view showing a conventional electric detonator.

【符号の説明】[Explanation of symbols]

１ 栓体 ２１ リ−ドピン挿通孔 ２２ テ−パ孔 ３１ リ−ドピン ３２ リ−ドピン ３４ 封止剤 ４ 電橋線 ５ 金属端板 ５１ 第１リ−ドピン挿通口 ５２ 第２リ−ドピン挿通口 ５３ スカ−ト部 ６１ 溶接部 ６２ 絶縁封止剤 ６３ 溶接部 ７ 有底金属筒 ７１ 着火薬 DESCRIPTION OF SYMBOLS 1 Plug 21 Lead pin insertion hole 22 Taper hole 31 Lead pin 32 Lead pin 34 Sealant 4 Bridge wire 5 Metal end plate 51 First lead pin insertion opening 52 Second lead pin insertion opening 53 skirt part 61 welded part 62 insulating sealant 63 welded part 7 bottomed metal cylinder 71 ignition agent

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】絶縁栓体に一対のリ−ドピンが貫設され、
該栓体の一端側においてリ−ドピン間に電橋線が接続さ
れ、上記一対のリ−ドピンの一方のリ−ドピンに対する
第１リ−ドピン挿通口と他方のリ−ドピンに対する第２
リ−ドピン挿通口とを有する金属端板が上記栓体の他端
側に各リ−ドピン挿通口に各リ−ドピンが挿通された状
態で配設され、上記第１リ−ドピン挿通口とその挿通さ
れたリ−ドピンとの間が溶接により封止され、上記第２
リ−ドピン挿通口とその挿通されたリ−ドピンとの間が
絶縁封止剤により封止され、着火薬が収納された有底金
属筒が上記栓体上に被せられ、上記金属端板の周囲が上
記有底金属筒の開口に溶接により封止されていることを
特徴とする電気***。1. A pair of lead pins are penetratingly provided on the insulating plug body,
A bridge wire is connected between the lead pins on one end side of the plug body, and a first lead pin insertion opening for one lead pin of the pair of lead pins and a second lead pin for the other lead pin.
A metal end plate having a lead pin insertion port is arranged on the other end side of the plug body in a state where each lead pin is inserted into each lead pin insertion port, and the first lead pin insertion port. The space between the inserted lead pin and the lead pin is sealed by welding, and the second pin
A space between the lead pin insertion port and the inserted lead pin is sealed with an insulating sealant, and a bottomed metal cylinder containing an igniting agent is covered on the plug body, and the metal end plate An electric detonator, the periphery of which is sealed by welding in the opening of the bottomed metal cylinder. 【請求項２】金属端板周囲にスカ−ト部が設けられ、該
スカ−ト部が有底金属筒の開口に溶接により封止されて
いる請求項１記載の電気***。2. The electric detonator according to claim 1, wherein a skirt portion is provided around the metal end plate, and the skirt portion is sealed by welding in the opening of the bottomed metal cylinder. 【請求項３】各リ−ドピンに皿形頭部が設けられ、その
リ−ドピン頭部を受容するリ−ドピン挿通口部がテ−パ
孔とされ、各テ−パ孔と皿形頭部との間が封止剤で封止
されている請求項１または２記載の電気***。3. A lead-shaped head is provided on each lead pin, and a lead-pin insertion opening for receiving the lead-pin head is a taper hole. The electric detonator according to claim 1 or 2, wherein a space between the portion and the portion is sealed with a sealant.