First joint

Abstract

To provide a first joint that can suppress malfunctions of the operating part. [Solution] The first joint comprises a first joint body 1, an axially opposing portion 75, an operating portion 71, and a mounting portion 3, with the first joint body connected to the second joint. When the first joint body is connected to the second joint, the axially opposing portion faces a projection protruding from the outer circumferential surface of the second joint from the axial front end side of the first joint body in the axial direction. The operating portion 71 is connected to the axially opposing portion and operates along the axial crossing direction intersecting the central axis, thereby switching between a facing state and a non-facing state between the axially opposing portion and the projection in the axial direction. The mounting member is mounted on the outer circumferential surface of the first joint body and has an operating portion restricting portion movement when the axially opposing portion and the projection are facing each other. When the operating portion is pressed toward the other side in the axial crossing direction, the axially opposing portion is displaced toward the other side in the axial crossing direction, and the axially opposing portion and the projection switch from a facing state to a non-facing state.

Claims

1. A first joint having a central axis and extending in the axial direction along the central axis, The first joint body is connected to the second joint along the aforementioned central axis, In the state in which the first joint body is connected to the second joint, the projection protruding from the outer circumferential surface of the second joint is opposed to the axially facing portion of the first joint body from the axial front end side, An operating unit connected to the axially opposing portion and operating along the axial intersection direction intersecting the central axis, thereby switching between an opposing state and a non-opposing state between the axially opposing portion and the projection in the axial direction, Mounting member attached to the outer circumferential surface of the first joint body and It has, The mounting member has an operating part restricting portion that restricts the movement of the operating part when the axially opposing portion and the projection portion are facing each other. A first joint, wherein the operating part is pressed toward the other side in the direction of the axial intersection, causing the axially opposing part to be displaced toward the other side in the direction of the axial intersection, and the axially opposing part and the projection to switch from the opposing state to the non-opposing state.

2. The operating part has a hole that extends along the axial direction, The first joint according to claim 1, wherein the mounting member has a mounting member projection that is positioned in the hole when the axially opposing portion and the projection are facing each other, as the operating portion restricting portion.

3. The first joint according to claim 1, wherein the mounting member has a cover portion that, as the operating portion restricting portion, is positioned radially outward from the radially outward surface of the operating portion in the state in which the axially opposing portion and the projection portion are facing each other.

4. The mounting member is movable between a first position and a second position along the axial direction, the first position being the position where the cover portion faces the operating portion in the direction intersecting the axis. The second position indicates a position where the cover portion is located away from the first position in the axial direction. In the first position, the radially inner surface of the cover portion and the radially outer surface of the operating portion face each other with a space between them, as described in claim 3.

5. The mounting member further includes a movement restricting portion that restricts the movement of the mounting member in the circumferential direction with respect to the central axis, The operating part is positioned radially outward from the radially outward surface of the first joint body in the state in which the axially opposing part and the projection part are facing each other. The first joint according to claim 3 or 4, wherein the movement restricting portion faces both end faces of the operating portion in the circumferential direction when the axially opposing portion and the projection portion are facing each other.

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