{
  "abstract": "An extension/contraction device that is used when tensioning a wire is provided. This extension/contraction device comprises an extension/contraction device body and a power unit. The extension/contraction device body has: an outside tubular part; an inside tubular part inserted into the outside tubular part from one axial end thereof; a moving part that has a threaded shaft that passes through the outside tubular part and the inside tubular part, and a nut that is fixed to the other axial end of the inside tubular part and is screwed onto the threaded shaft; and an operating part that rotates the threaded shaft about the center axis to move the nut along the threaded shaft. The power unit is detachably attached to the extension/contraction device body. An engagement part that engages with the operating part, and a motor for rotating the engagement part, are also provided.",
  "assignees": [
    "NAGAKI SEIKI KK"
  ],
  "authors": [
    "KIMURA SHINGO",
    "MIYAKO TAKASHI",
    "SAIJO NAOKI"
  ],
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    "name": "Creative Commons Attribution 4.0 International",
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  "publication_id": "OT-2026-000001963",
  "published_at": "2026-09-15T19:09:47.917802Z",
  "publisher": "Nebula Innovations Limited",
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  "source_date": "2026-03-12",
  "source_id": "US-2026070198-A1",
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  "supersedes": null,
  "title": "Extension/contraction device and wire tensioning device",
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}