JPH02117507U - - Google Patents
Info
- Publication number
- JPH02117507U JPH02117507U JP2585289U JP2585289U JPH02117507U JP H02117507 U JPH02117507 U JP H02117507U JP 2585289 U JP2585289 U JP 2585289U JP 2585289 U JP2585289 U JP 2585289U JP H02117507 U JPH02117507 U JP H02117507U
- Authority
- JP
- Japan
- Prior art keywords
- optical cable
- plastic layer
- slot rod
- spiral groove
- rod
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000004804 winding Methods 0.000 description 1
Description
第１図、第２図および第３図はそれぞれ本考案
のスロツトロツドの第一、第二および第三の実施
例の断面構造図、第４図は従来のスロツト形光ケ
ーブルの断面構造図である。
１，４１……中心抗張力体、２，２１，２２…
…切り裂き紐、３，４３……プラスチツク層、４
……スロツトロツド、５，４５……らせん溝、８
……外層プラスチツク層、９……内層プラスチツ
ク層、４０……テープ心線、４６……押え巻、４
７……外被。
1, 2 and 3 are sectional structural views of first, second and third embodiments of the slotted rod of the present invention, respectively, and FIG. 4 is a sectional structural view of a conventional slotted optical cable. 1,41...Central tensile strength member, 2,2 1,2 2 ...
...Tear string, 3,43...Plastic layer, 4
...Slot rod, 5,45...Spiral groove, 8
...Outer plastic layer, 9...Inner plastic layer, 40...Tape core wire, 46...Press winding, 4
7... Outer covering.
Claims (1)
チツク層の外周にらせん溝を形成した構造の光ケ
ーブル用スロツトロツドにおいて、 前記中心抗張力体とプラスチツク層の境界面に
切り裂き紐２を配設してなる ことを特徴とする光ケーブル用スロツトロツド。 (2) 中心抗張力体の周囲に押出成形したプラス
チツク層の外周にらせん溝を形成した構造の光ケ
ーブル用スロツトロツドにおいて、 前記プラスチツク層内に切り裂き紐２を配設し
てなる ことを特徴とする光ケーブル用スロツトロツド。 (3) 中心抗張力体の周囲に押出成形したプラス
チツク層の外周にらせん溝を形成した構造の光ケ
ーブル用スロツトロツドにおいて、 前記プラスチツク層は内層プラスチツク層およ
び外層プラスチツク層の複数層構成からなり、か
つ 前記内層プラスチツク層と外層プラスチツク層
の境界面に切り裂き紐を配設してなる ことを特徴とする光ケーブル用スロツトロツド。 (4) 前記らせん溝は、一方向撚構造からなるこ
とを特徴とする請求項１，２または３記載の光ケ
ーブル用スロツトロツド。 (5) 前記らせん溝は、ＳＺ撚構造からなること
を特徴とする請求項１，２または３記載の光ケー
ブル用スロツトロツド。 (6) 前記切り裂き紐は複数本からなることを特
徴とする請求項１，２または３記載の光ケーブル
用スロツトロツド。 (7) 前記切り裂き紐は、前記らせん溝の溝底に
沿つて埋設してなることを特徴とする請求項１，
２または３記載の光ケーブル用スロツトロツド。 (8) 前記切り裂き紐の配設位置にマークを施し
てなることを特徴とする請求項１，２または３記
載の光ケーブル用スロツトロツド。[Claims for Utility Model Registration] (1) In a slotted rod for an optical cable having a structure in which a spiral groove is formed on the outer periphery of a plastic layer extruded around a central tensile strength member, a tearing string is provided at the interface between the central tensile strength member and the plastic layer. 2. A slot rod for an optical cable. (2) A slot rod for an optical cable having a structure in which a spiral groove is formed on the outer periphery of a plastic layer extruded around a central tensile strength member, characterized in that a tearing string 2 is disposed within the plastic layer. Throttled. (3) In a slot rod for an optical cable having a structure in which a helical groove is formed on the outer periphery of a plastic layer extruded around a central tensile strength member, the plastic layer has a multilayer structure of an inner plastic layer and an outer plastic layer, and the inner layer A slotted rod for an optical cable, characterized in that a tearing cord is provided at the interface between a plastic layer and an outer plastic layer. (4) The slot rod for an optical cable according to claim 1, 2 or 3, wherein the spiral groove has a unidirectionally twisted structure. (5) The slot rod for an optical cable according to claim 1, 2 or 3, wherein the spiral groove has an SZ twist structure. (6) The slot rod for an optical cable according to claim 1, 2 or 3, wherein the tearing string consists of a plurality of pieces. (7) Claim 1, wherein the tearing string is embedded along the bottom of the spiral groove.
3. Slot rod for optical cable according to 2 or 3. (8) The slot rod for an optical cable according to claim 1, 2 or 3, wherein a mark is provided at a position where the tearing string is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2585289U JPH02117507U (en) | 1989-03-07 | 1989-03-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2585289U JPH02117507U (en) | 1989-03-07 | 1989-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02117507U true JPH02117507U (en) | 1990-09-20 |
Family
ID=31246955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2585289U Pending JPH02117507U (en) | 1989-03-07 | 1989-03-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02117507U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004240061A (en) * | 2003-02-04 | 2004-08-26 | Furukawa Electric Co Ltd:The | Optical fiber cable |
-
1989
- 1989-03-07 JP JP2585289U patent/JPH02117507U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004240061A (en) * | 2003-02-04 | 2004-08-26 | Furukawa Electric Co Ltd:The | Optical fiber cable |
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