Nippon Pillar Packing Co., Ltd.

Kiyotaka Ohmae

Masashi Katanaya

Kazukiyo Teshima

Atsushi Nakano

Shingo Higuchi

Tomoyuki Koike

Ayumi Kurosaki

Hiroki Sakamoto

Tomohiro Adachi

Daisuke Urata

Masaki Miyamoto

Satoru Matsuda

A first peripheral wall end portion of a conversion adapter is connected to a tubular body across a gasket, and has either an annular protrusion to be pressed into an annular groove on a side surface of the gasket, or an annular groove to allow an annular protrusion projecting from a side surface of the gasket to be pressed thereinto. The first peripheral wall end portion has either an internally threaded portion to allow an externally threaded portion of the tubular body to be screwed thereinto, or an externally threaded portion to allow a nut to be screwed thereonto. The nut also allows an externally threaded portion of the tubular body to be screwed thereinto. A second peripheral wall end portion of the conversion adapter has an externally threaded portion to allow another nut to be screwed thereonto, and then, to allow the sleeve to make contact with the inside.

Conversion adapter and fitting with the same

A flow passage unitincludes a base plateand a plurality of fluid devicesprovided on the base plate. The plurality of fluid devicesinclude a first fluid devicehaving a first flow passage hole, and a second fluid devicehaving a second flow passage hole. The first fluid deviceis disposed on an upper side of the base plateand detachably provided on the base plate, and the second fluid deviceis disposed on a lower side of the base plateand detachably provided on the base plate. The base platehas a first through holeformed so as to penetrate the base platein a thickness direction of the base plateto provide communication between the first flow passage holeand the second flow passage hole

Flow passage unit

A tapered surface is formed at each axially outer end portion of an inner circumferential surface of a gasket such that a diameter thereof gradually increases from an axially inner side toward an axially outer end thereof in a state before an annular primary sealing portion of the gasket is press-fitted into an annular primary sealing groove of a fluid device. A diameter increase starting point of the tapered surface is located in a range from a deformation starting point position serving as a starting point from which the inner circumferential surface is deformed due to the primary sealing portion receiving external force form the fluid device when the primary sealing portion is press-fitted into the primary sealing groove, to a center position in an axial direction of the inner circumferential surface.

Gasket and flow passage joint structure

An inner ringof a pipe jointincludes a cylindrical body portionhaving a communication holefor providing communication between flow passage holesandof a joint bodyand a tube, and an annular primary sealing portionprojecting from a radially inner side of an axially outer end portion of the body portiontoward an axially outer side and to be press-fitted into an annular primary sealing grooveformed on the joint body. The primary sealing portionis formed so as to be tapered from an axially inner end thereof toward an axially outer end thereof in an axial cross-sectional view, and has a flat surfaceextending from a radially outer endof the axially outer end thereof toward the radially inner side.

Sealing member and pipe joint

A flow passage joint structure includes: a first external thread portion formed, at an end portion of first piping block, radially outward of flow passage hole; a second external thread portion formed, at an end portion of second piping block, radially outward of flow passage hole; a union nut having a first internal thread portion to be screwed to the first external thread portion, on one side in an axial direction thereof, and having a second internal thread portion to be screwed to the second external thread portion, on another side in the axial direction thereof; and a gasket configured to seal a connection portion between the flow passage holes on a radially inner side of the union nut. The first external thread portion and the first internal thread portion are right-hand threads, and the second external thread portion and the second internal thread portion are left-hand threads.

Flow passage joint structure

A sleeve, a cylindrical member for connecting a tube to a tubular body of a fitting, includes a first peripheral wall end portion facing a peripheral wall end portion of the tubular body, and a second peripheral wall end portion pressed into an open end of the tube. The first peripheral wall end portion includes either an annular protrusion or groove. The annular protrusion is pressed into an annular groove in the peripheral wall end portion of the tubular body. The annular groove allows an annular protrusion axially projecting from the peripheral wall end portion of the tubular body to be pressed thereinto. The second peripheral wall end portion includes a bulge portion to expand the diameter of the open end of the tube. An outer periphery of the first peripheral wall end portion includes a flange to axially face the peripheral wall end portion of the tubular body.

Sleeve and fitting with the same

Gasket

A resin joint includes a joint body having a flow path, sleeves, and union nuts that fix tubes to the joint body. The joint body has a body portion with a curved inner peripheral surface and a straight portion protruding from an end portion of the body portion. The straight portion has outer and inner cylindrical portions radially arranged inside the outer cylindrical portion. An end portion of the inner cylindrical portion is positioned closer to the body portion than is an end portion of the outer cylindrical portion. A groove portion extending parallel with the outer and inner cylindrical portions in an axial direction is formed between an inner peripheral surface of the outer cylindrical portion and an outer peripheral surface of the inner cylindrical portion. The tube is fixed to the joint body such that a press-fit portion of the sleeve is press-fitted in the groove portion.

Resin joint, channel block, and fluid control device

An antistatic cover which, when the cover covers an insulating resin-made tube, can enhance the certainty of preventing the tube from being electrically charged, and can facilitate attachment to and detachment from the tube. The tubular cover body, is divided in a circumferential direction to form first and second divided portions. The cover body is elastically deformed such that the first and second divided portions separate from each other, and allow the tube to pass through between the first and second divided portions. The cover body has a plurality of first cutaway portions, which pass through at least one of the first and second divided portions in a radial direction of the cover body, and is configured such that, when the cover body is fitted onto the tube, a part of the tube can be exposed through the plurality of first cutaway portions.

Growing community of inventors

Osaka, Japan

Kiyotaka Ohmae