JPH0452952Y2 - - Google Patents
Info
- Publication number
- JPH0452952Y2 JPH0452952Y2 JP12135787U JP12135787U JPH0452952Y2 JP H0452952 Y2 JPH0452952 Y2 JP H0452952Y2 JP 12135787 U JP12135787 U JP 12135787U JP 12135787 U JP12135787 U JP 12135787U JP H0452952 Y2 JPH0452952 Y2 JP H0452952Y2
- Authority
- JP
- Japan
- Prior art keywords
- sealing member
- metal tube
- end surface
- terminal
- sheathed heater
- 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.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims description 45
- 239000002184 metal Substances 0.000 claims description 33
- 239000011810 insulating material Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案はシーズヒータの両端開口部を封口する
ために用いるシーズヒータの封口部材に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sealing member for a sheathed heater that is used to seal openings at both ends of the sheathed heater.
［従来の技術］
従来、シーズヒータは、第６図に示すように、
発熱線１とこの発熱線１の両端部に接続した端子
３とを金属管５内にて、この金属管５の軸上方向
に設け、無機電気絶縁材料７を介して充填固着し
たものである。このシーズヒータにおいては金属
管５の内部から外部までに端子３が突出して設け
られている。[Prior Art] Conventionally, a sheathed heater, as shown in Fig. 6,
A heating wire 1 and terminals 3 connected to both ends of the heating wire 1 are provided in a metal tube 5 in the axial direction of the metal tube 5, and are filled and fixed with an inorganic electrical insulating material 7 interposed therebetween. . In this sheathed heater, a terminal 3 is provided to protrude from the inside of the metal tube 5 to the outside.
金属管５の両端部内には封口部材９が設けられ
ている。封口部材９はシリコーンゴムなどのゴム
材料が用いられ、筒形状に形成されている。 A sealing member 9 is provided inside both ends of the metal tube 5. The sealing member 9 is made of a rubber material such as silicone rubber, and is formed into a cylindrical shape.
したがつて、封口部材９は、その封口部材９の
軸方向の孔内に端子３を貫通した後に、金属管５
の両端部の内側に圧入される。 Therefore, after the terminal 3 is passed through the hole in the axial direction of the sealing member 9, the metal tube 5 is inserted into the sealing member 9.
is press-fitted inside both ends of the
このようにして作られたシーズヒータでは、金
属管５内の無機電気絶縁材料７と外気との間が封
口部材９によつて遮断されるため、無機電気絶縁
材料７の外部への流出や外気の吸湿を防いでい
る。 In the sheathed heater made in this way, the sealing member 9 blocks the inorganic electrical insulating material 7 inside the metal tube 5 from the outside air, so that the inorganic electrical insulating material 7 does not leak out and the outside air prevents moisture absorption.
［考案が解決しようとする問題点］
しかしながら、封口部材９はゴム材料が用いら
れているため軟らかく、端子３が偏心して金属管
５と端子３との間の絶縁距離が保てず、耐電圧不
良の要因となつていた。[Problems to be solved by the invention] However, since the sealing member 9 is made of a rubber material, it is soft, and the terminal 3 is eccentric, making it impossible to maintain the insulation distance between the metal tube 5 and the terminal 3, and the withstand voltage is low. This was a cause of defects.
また、このシーズヒータでは無機電気絶縁材料
７の充填密度を高めるために金属管５の外周から
ロールを用いて引き伸ばしが行われるが、この際
封口部材９が金属管５の内方向にもぐり込んだ
り、端子３が金属管５の内方向に引かれてしま
い、金属管５から突出している端子５の規定長が
得られなくなるという問題がある。 In addition, in this sheathed heater, in order to increase the packing density of the inorganic electrical insulating material 7, the metal tube 5 is stretched from the outer periphery using rolls, but at this time, the sealing member 9 may sink inward into the metal tube 5. There is a problem in that the terminal 3 is pulled inward of the metal tube 5, making it impossible to obtain a specified length of the terminal 5 protruding from the metal tube 5.
さらに、端子３は偏心を繰り返すと、端子３、
金属管５及び封口部材９のそれぞれの間に隙間が
できるため、金属管５の内部の無機電気絶縁材料
７が外部に流出してしまうという問題がある。 Furthermore, if terminal 3 is repeatedly eccentric, terminal 3,
Since a gap is created between each of the metal tube 5 and the sealing member 9, there is a problem that the inorganic electrical insulating material 7 inside the metal tube 5 flows out to the outside.
［考案の目的］
本考案の目的は、端子の偏心を防ぐとともにシ
ーズヒータの両端部に封口部材を強固に嵌合した
シーズヒータの封口部材を提供することにある。[Object of the invention] An object of the invention is to provide a sealing member for a sheathed heater that prevents eccentricity of the terminal and tightly fits the sealing member to both ends of the sheathed heater.
［問題点を解決するための手段］
本考案によれば、発熱線と該発熱線の両端部に
接続した端子とを金属管内にて該金属管の軸上方
向に無機電気絶縁材料を介して充填固着し、該金
属管の内部から外部にまで上記端子を突出したシ
ーズヒータと、上記金属管の内側端部面と上記端
子との間の空間部分に封入される筒形状の封口部
材において、該封口部材は軸方向に上記端子を貫
通する孔と、上記金属管の内側端部面に当接する
テーパ形状の側周面とを有し、上記封口部材の大
きな直径の一方端面から該一方端面より小さな直
径の他方端面に向け、かつ上記孔及び上記側周面
にかけて放射状に溝部を形成したことを特徴とす
るシーズヒータの封口部材が得られる。[Means for solving the problem] According to the present invention, a heating wire and terminals connected to both ends of the heating wire are connected in the axial direction of the metal tube through an inorganic electrical insulating material. A sheathed heater that is filled and fixed and has the terminal protruding from the inside to the outside of the metal tube, and a cylindrical sealing member that is sealed in a space between the inner end surface of the metal tube and the terminal, The sealing member has a hole passing through the terminal in the axial direction, and a tapered side circumferential surface that comes into contact with the inner end surface of the metal tube, and the sealing member has a large diameter end surface to the one end surface. There is obtained a sealing member for a sheathed heater characterized in that a groove is formed radially toward the other end surface having a smaller diameter and extending over the hole and the side circumferential surface.
［作用］
このシーズヒータの封口部材によれば、シーズ
ヒータの両端部に封口部材を圧入すると、封口部
材の放射状の溝部が金属管により押されて狭まり
端子を強固に挟み込む。封口部材の圧入後には、
金属管の内面と端子の側周面との方向に常に力が
加わる状態となる。[Function] When the sealing member for the sheathed heater is press-fitted into both ends of the sheathed heater, the radial grooves of the sealing member are pressed and narrowed by the metal tubes, firmly sandwiching the terminals.
A force is constantly applied in the direction between the inner surface of the metal tube and the side peripheral surface of the terminal.
［実施例］
第１図及び第２図は本考案のシーズヒータの封
口部材の一実施例を示している。[Embodiment] FIGS. 1 and 2 show an embodiment of a sealing member for a sheathed heater of the present invention.
実施例において、シーズヒータは、従来例にて
示した第６図のシーズヒータと同様なものを用い
るため図符号を同様にして詳しい説明は省略す
る。 In the embodiment, the sheathed heater is similar to the sheathed heater shown in FIG. 6 shown in the conventional example, so the reference numerals are the same and detailed explanation will be omitted.
図示のシーズヒータの封口部材１１は、ポリエ
チレンあるいはポリプロピレン等の樹脂材料を用
いて筒形状に形成されている。 The sealing member 11 of the illustrated sheathed heater is formed into a cylindrical shape using a resin material such as polyethylene or polypropylene.
封口部材１１には、軸上方向に端子３を貫通す
る孔１３と、金属管５の内側端部面に当接するテ
ーパ形状の側周面１５とが形成されている。 The sealing member 11 is formed with a hole 13 that passes through the terminal 3 in the axial direction, and a tapered side circumferential surface 15 that comes into contact with the inner end surface of the metal tube 5 .
封口部材１１の一方端面１７は他方端面１９よ
りも大きな直径を有している。封口部材１１の他
方端面１９の直径は金属管５の内径とほぼ等し
い。この封口部材１１の一方端面１５には孔１３
から一方端面１５の外周端にかけて放射状の溝部
２１が形成されている。 One end surface 17 of the sealing member 11 has a larger diameter than the other end surface 19. The diameter of the other end surface 19 of the sealing member 11 is approximately equal to the inner diameter of the metal tube 5. A hole 13 is provided in one end surface 15 of this sealing member 11.
A radial groove portion 21 is formed from the first end surface 15 to the outer peripheral end of the one end surface 15 .
溝部２１はこの封口部材１１の他方端面１９に
向けて封口部材１１の軸方向長の1/2以上の深さ
にまで形成されている。 The groove portion 21 is formed toward the other end surface 19 of the sealing member 11 to a depth of 1/2 or more of the axial length of the sealing member 11.
今、封口部材１１は、第２図に示すように、封
口部材１１の孔１３と端子３との軸方向を一致さ
せるとともに、封口部材１１の他方端面１９を金
属管５の端部に向けて、端子３を孔１３に貫通さ
せる。そして金属管５の内側端部面５ａとこの内
側端部面５ａ内に位置する端子３との間の空間部
分には、封口部材１１が圧入される。 Now, as shown in FIG. 2, the sealing member 11 is arranged so that the axial directions of the hole 13 of the sealing member 11 and the terminal 3 are aligned, and the other end surface 19 of the sealing member 11 is directed toward the end of the metal tube 5. , the terminal 3 is passed through the hole 13. A sealing member 11 is press-fitted into the space between the inner end surface 5a of the metal tube 5 and the terminal 3 located within the inner end surface 5a.
圧入された封口部材１１は、第３図及び第４図
に示すように、溝部２１が挟まるように、金属管
５の内側端部面５ａによつて押圧されて、封口部
材１１の孔１３の内面が端子３の外周面を挟み込
む。 As shown in FIGS. 3 and 4, the press-fitted sealing member 11 is pressed by the inner end surface 5a of the metal tube 5 so that the groove 21 is sandwiched between the holes 13 of the sealing member 11. The inner surface sandwiches the outer peripheral surface of the terminal 3.
このように、シーズヒータの端部に嵌合された
封口部材１１は、第５図の矢印にて示すように、
金属管５の内側端部面５ａの向きと、端子３の外
周面との向きに力が加わり、金属管５の端部を強
固に封口する。 In this way, the sealing member 11 fitted to the end of the sheathed heater, as shown by the arrow in FIG.
Force is applied in the direction of the inner end surface 5a of the metal tube 5 and the direction of the outer peripheral surface of the terminal 3, and the end of the metal tube 5 is firmly sealed.
［考案の効果］
以上、実施例により説明したように本考案のシ
ーズヒータの封口部材によれば、封口部材に放射
状の溝部を形成して、この封口部材をシーズヒー
タの金属管の端部に圧入したため、金属管の端部
内側面と端子の外周面とを強固に保持出来る。[Effects of the invention] As described above with reference to the embodiments, according to the sealing member of the sheathed heater of the present invention, radial grooves are formed in the sealing member, and the sealing member is attached to the end of the metal tube of the sheathed heater. Since it is press-fitted, the inner surface of the end of the metal tube and the outer peripheral surface of the terminal can be firmly held.
このため、端子は偏心が防げるとともに、端子
の軸方向での引つ張りが発生せずシーズヒータの
端部をしつかりと封口することができる。 Therefore, eccentricity of the terminal can be prevented, and the end of the sheathed heater can be firmly sealed without causing any tension in the axial direction of the terminal.
第１図は本考案のシーズヒータの封口部材の一
実施例を示す斜視図、第２図は第１図の封口部材
とシーズヒータとを示す断面図、第３図は第２図
の封口部材をシーズヒータに圧入した状態の平面
図、第４図は第３図の−断面図、第５図は封
口部材の圧力方向を示す説明図、第６図は従来の
封口部材をシーズヒータに圧入した状態の断面図
である。
１……発熱線、３……端子、５……金属管、７
……無機電気絶縁材料、１１……封口部材、１３
……孔、２１……溝部。
FIG. 1 is a perspective view showing an embodiment of the sealing member of the sheathed heater of the present invention, FIG. 2 is a sectional view showing the sealing member of FIG. 1 and the sheathed heater, and FIG. 3 is the sealing member of FIG. 2. 4 is a cross-sectional view of FIG. 3, FIG. 5 is an explanatory diagram showing the pressure direction of the sealing member, and FIG. 6 is a diagram showing a conventional sealing member press-fitted into a sheathed heater. FIG. 1...Heating wire, 3...Terminal, 5...Metal tube, 7
... Inorganic electrical insulating material, 11 ... Sealing member, 13
... Hole, 21 ... Groove.
Claims (1)
金属管内にて該金属管の軸上方向に無機電気絶縁
材料を介して充填固着し、該金属管の内部から外
部にまで上記端子を突出したシーズヒータと、上
記金属管の内側端部面と上記端子との間の空間部
分に封入される筒形状の封口部材において、該封
口部材は軸方向に上記端子を貫通する孔と、上記
金属管の内側端部面に当接するテーパ形状の側周
面とを有し、上記封口部材の大きな直径の一方端
面から該一方端面より小さな直径の他方端面に向
け、かつ上記孔及び上記側周面にかけて放射状に
溝部を形成したことを特徴とするシーズヒータの
封口部材。 A heating wire and terminals connected to both ends of the heating wire are filled and fixed in the axial direction of the metal tube via an inorganic electrical insulating material, and the terminals are connected from the inside to the outside of the metal tube. A cylindrical sealing member sealed in a space between the protruding sheathed heater, the inner end surface of the metal tube, and the terminal, the sealing member having a hole passing through the terminal in the axial direction; a tapered side circumferential surface that abuts the inner end surface of the metal tube, and extends from one end surface of the sealing member having a large diameter to the other end surface having a smaller diameter than the one end surface; A sealing member for a sheathed heater, characterized in that grooves are formed radially across the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12135787U JPH0452952Y2 (en) | 1987-08-07 | 1987-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12135787U JPH0452952Y2 (en) | 1987-08-07 | 1987-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6427885U JPS6427885U (en) | 1989-02-17 |
| JPH0452952Y2 true JPH0452952Y2 (en) | 1992-12-11 |
Family
ID=31368291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12135787U Expired JPH0452952Y2 (en) | 1987-08-07 | 1987-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452952Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3702257B2 (en) | 2002-08-23 | 2005-10-05 | ファナック株式会社 | Robot handling device |
-
1987
- 1987-08-07 JP JP12135787U patent/JPH0452952Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6427885U (en) | 1989-02-17 |
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