Kunimori Kagaku Co., Ltd.

Kunimorikagaku Ltd.

Hideo Matsuura

Hitoshi Fukao

Osamu Ozaki

A tubular joint adapted to connect a pair of pipes is formed by a joint body made of a synthetic resin having a pair of connection ports integrally formed on respective sides thereof. An engaging groove is formed around an axial line on an outside circumferential surface of each of the connection ports, and a synthetic resin-made fall-out preventing member is fixed at an end portion of each of the connection ports. An outside cylindrical portion of each of the fall-out preventing members has a tapered surface adapted to enable the fall-out preventing members to be press-fitted onto the respective connection ports, and includes a plurality of engaging portions that are engaged with the engaging groove formed around the axial line on the outside circumferential surface of each of the connection ports as the fall-out preventing members are press-fitted thereon. And an inside cylindrical portion of each of the fall-out preventing members extends toward a center of the connection ports in an inclined manner, and includes a plurality of fall-out stoppers whose tip ends are shaped so as to be engaged in a groove portion formed around an axial line on the outside circumferential surface of the respective pipes to be connected as the pipes are inserted and fitted in the connection ports.

Tubular joint

A tubular joint including at least a pair of connection ports having an inner diameter substantially equivalent to an outer diameter of tubes to be connected, and a tubular connection part connecting the connection ports to each other. The connection ports each have a sealing member formed integrally thereon by extruding elastomer resin into a first recess formed around an axial line on an inner circumferential face of the connection ports, and the connection ports each have a fall-out preventing member coupled to an end part of the connection ports. The fall-out preventing member includes a ring-like member having an outer diameter sized for insertion into the connection ports, and a number of claws having leading edges located in a second recess formed around the axial line on the inner circumferential face of the connection ports and extending toward a center of the connection ports. When a tube is inserted into one of the connection ports, the claws slidably contact an outer circumferential face of the tube and are elastically deformed in a diameter-swelling direction to thereby enable insertion of the tube, whereupon the claws are brought into contact with the outer circumferential face of the tube due to an elasticity return pressure to thereby prevent the inserted tube from falling out of the one of the connection ports. At the same time, the sealing member is simultaneously brought into contact with the outer circumferential face of the inserted tube to thereby achieve an airtight coupling between the inserted tube and the one of the connection ports.

A washer is positioned beneath a superimposed assembly of two or more flat thin objects (e.g. resin sheets) which is horizontally supported. A hollow joining pin is fitted about a metal pin supported vertically and coaxially with the washer. The joining pin has a head, a shank and a tapered end portion which is severable from the shank. The metal pin has a pointed end about which the tapered end portion of the joining pin is positioned. The metal pin is vertically movable with the joining pin, or independently of it. The metal pin and the joining pin are moved down to drive its pointed end and its tapered end portion, respectively, into the assembly to make a hole therein and force the shank through the hole until the shank is engaged with the washer, whereby the objects are secured together between the head of the joining pin and the washer. The metal pin is moved down through the joining pin to sever its tapered end portion from its shank. The objects, washer, and joining pin are all of the same material.

Growing community of inventors

Komaki, Japan

Hideo Matsuura