Kubota Corporation

Daichi Higasa

Kohei Ikeda

Yuito Komaru

Masataka Shimomura

Shozo Kishi

A watertightness testing device () for performing a watertightness test of a joined section between joined pipes (and), the watertightness testing device () including a testing device body () and a moving operation rod () for moving the testing device body () in the pipes in a pipe axial direction (B) from outside an end section of the pipes, wherein the moving operation rod () is provided in the testing device body () and extends along the pipe axial direction (B), main supporting members (and) for supporting the moving operation rod () are provided on the moving operation rod () outside the pipe (), and the main supporting members (and) have a rotatable main rolling member () in a lower end section, the main supporting members (and) are switchable between a supporting posture (K) in which the main supporting members (and) support the moving operation rod () outside of the pipes and a folded posture in which the main supporting members (and) are folded inside the pipes, and the main supporting members (and) are urged from the folded posture toward the supporting posture (K).

Watertightness testing device and watertightness testing method

A watertightness testing method for testing watertightness of a joined section () where one end section of a second pipe () is joined to a first pipe (), the watertightness testing method including: inserting a testing device body () into the first pipe (); attaching an assembling device () to another end section of the second pipe (); attaching a pulling device () to the assembling device () and connecting the pulling device () to a strap-shaped member () having been wound in advance around an outer circumference of the first pipe (); operating the pulling device () and pulling the strap-shaped member () in a separating direction of the second pipe () to have a reaction force generated in the second pipe () cause the second pipe () to be pulled in a joining direction (G), the one end section of the second pipe () to be inserted into the first pipe (), and the second pipe () to be joined to the first pipe (); and operating a moving operation rod () provided in the testing device body () from outside of the other end section of the second pipe () in a state where the second pipe () is being pulled in the joining direction (G) to move the testing device body () to the joined section ().

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Amagasaki, Japan

Daichi Higasa