Pipe fitting
AssigneeSMC Corporation
InventorsShuichi SAITO, Masanobu YAMANASHI, Takahiro SUZUKI, Akihito TAKANASHI
Life of this patent
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Abstract
A chuck stored in a sleeve has an engagement piece formed with a claw part capable of being locked to an outer surface of a tube. The sleeve is rotatable between a first rotation position and a second rotation position relative to a body. A pipe fitting includes a cam part that guides the engagement piece along with the rotation of the sleeve in such a way that the distance from the engagement piece to the axial center of the chuck changes. An unlock mechanism removes restriction on the rotation of the sleeve in accordance with the insertion of the tube to a predetermined position.
Claims12
A fitting to which a tube is to be connected, the fitting comprising a chuck, a body, and a sleeve,
- wherein the chuck accommodated in the sleeve includes an engaging piece provided with a claw portion configured to be locked to an outer surface of the tube,
- the sleeve disposed outside the chuck is rotatable relative to the body between a first rotational position and a second rotational position,
- the fitting comprises:
- a guide mechanism configured to guide the engaging piece in a manner so that a distance from the engaging piece to an axis of the chuck changes in accordance with rotation of the sleeve;
- a rotation locking mechanism configured to restrict the rotation of the sleeve at the first rotational position and the second rotational position;
- and
- a lock release mechanism configured to, due to the tube being inserted to a predetermined position, release restriction on the rotation of the sleeve located at the first rotational position, and
- the claw portion does not contact the tube when the sleeve is located at the first rotational position, and the claw portion is locked to the outer surface of the tube when the sleeve is located at the second rotational position.
Dependencies are inferred from the claim text.