LEAD-IN WIRE TENSION SHOCK ABSORBING DEVICE

• Main Author: NAKADA MASATO
• Format: Patent
• Language: English; Japanese
• Published: 18.01.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES

To provide a lead-in wire tension shock absorbing device capable of preventing a damage to a building even in the case where an abnormal tension equal to or more than a limit of a spring acts on the lead-in wire.SOLUTION: A lead-in wire tension shock absorbing device comprises: a long-length tension shock absorbing device main body 11 that builds a spring 14 therein; a forward-and-backward moving member 15 to which a lead-in wire 3 is hooked, and which elastically moves forward and backward in the tension shock absorbing device main body 11 by the spring 14; and a slide member 13 at a tension excessive timing in which a hook fixed to a building is hooked and an engagement part 13c at a rear end part of the slide member 13 at the tension excessive timing is provided at a rear end side. The tension shock absorbing device main body 11 is provided with: a stopper groove part 11a1 at a normal tension timing and a slide groove part 11a2 at an excessive tension timing; and a stopper cancelling part 12 that is fixed to the forward-and-backward moving member 15, moves the engagement part 13c at the rear end part of the slide member 13 at the tension excessive timing to the slide groove part 11a2 at the excessive tension timing from the stopper groove part 11a1 at the normal tension timing to extent the slide member 13 at the tension excessive timing when a tension acting on the forward-and-backward moving member 15 becomes excess.SELECTED DRAWING: Figure 21 【課題】スプリングの限界以上の異常張力が引込線に作用した場合でも建物の損傷を防止する引込線の張力緩衝装置を提供する。【解決手段】スプリング１４を内蔵した長尺の張力緩衝装置本体１１と、引込線３が掛止され、スプリング１４によって弾性的に張力緩衝装置本体１１内で進退する進退部材１５と、建物に固定されたフックが掛止され、後端側には張力過大時スライド部材１３後端部の係合部１３ｃが設けられた張力過大時スライド部材１３とを備え、張力緩衝装置本体１１には、通常張力時ストッパー用溝部１１ａ１と過大張力時スライド用溝部１１ａ２と、進退部材１５に固定され、進退部材１５に作用する張力が過大になった際に、張力過大時スライド部材１３後端部の係合部１３ｃを通常張力時ストッパー用溝部１１ａ１から過大張力時スライド用溝部１１ａ２へ移動させて張力過大時スライド部材１３を伸長させるストッパー解除部１２とを設ける。【選択図】図２１