Abstract: A fitting assembly for fluid device is provided, which includes a first port, a second port, a first annular member, a second annular member, and a connector. The first port is annular and installed at a first fluid device to be connected with its first fluid channel. The second port is annular and installed at a second fluid device to be connected with its second fluid channel. The first annular member is installed at the first port and has a first coupler. The second annular member is installed at the second port and has a second coupler to be coupled with the first coupler to fix the second annular member to the first annular member. The connector is installed between the first port and the second port and seals gaps between the connector and the first and second ports.

Abstract: An integrated block 1 serving as a fluid device includes: a flow port 13 open to form one end of a passage P; an annular groove 14 arranged along an outer circumferential edge of the flow port 13, the annular groove 14 being open so as to insert the gasket 2 therein; a first tapered portion 17 arranged on a radially-inner side interior wall 14b of the annular groove 14 and sloped radially outward from an open end of the annular groove 14 in a depth direction of the annular groove 14; and a guide 18 arranged on a radially-outer side interior wall 14a of the annular groove 14, extending throughout a predetermined range D from the open end of the annular groove 14 in the depth direction, and having a larger diameter than an outer circumferential surface 22a of a second sealing portion 22 of the gasket 2.

Abstract: One of an external thread of a fitting body and an internal thread of a sleeve includes two thread ridges and the other includes two thread grooves. The two thread ridges have transverse cross sections different in shape or size. A transverse cross section of the first thread groove allows that of the first thread ridge to be fit thereinto. A transverse cross section of the second thread groove prevents that of the first thread ridge from being fit thereinto but allows that of the second thread ridge to be fit thereinto. A leading portion of the second thread ridge is tapered in width. A leading portion of the first thread groove is inversely tapered in width. A leading portion of the first thread ridge has a transverse cross section that extends beyond a transverse cross section of the leading portion of the second thread groove.

Abstract: A fitting body is tubular, whose first and second axial end portions include a connector for a tube and an annular groove, respectively. A sleeve has first and second axial end portions including an annular protrusion and a connector for another tube, respectively. A nut is engaged with an external thread of the fitting body or the sleeve. Engagement of the external thread with the nut causes press—fit of the annular protrusion into the annular groove to form a seal region. Under a condition that a depth of the annular groove is three or more times as large as a thickness of a radially inward or outward wall of the annular groove, an axial distance from the seal region to a bottom of the annular groove exceeds ten times an increment width of the annular groove caused by the press-fit of the annular protrusion into the annular groove.

Abstract: A gasket-mounting structure includes a mounting member and a gasket. The mounting member includes a first base, an outer sleeve protruding from the first base, an inner sleeve protruding from the first base in the same direction of the outer sleeve radially inside the outer sleeve, and a groove surrounded by the first base, the outer sleeve, and the inner sleeve. The gasket includes an annular second base, an annular outer protrusion extending from the second base to be pressed in the groove, and an annular inner protrusion extending from the second base to be axially pressed on the inner sleeve radially inside the outer protrusion such that the inner sleeve is radially placed between the outer protrusion and the inner protrusion.

Abstract: A resin tube fitting prevents backwaters between its body and inner ring. The fitting includes a body, an inner ring, and a union nut. The body has main, outer, and inner sleeves, and a groove. The inner ring has a cylinder, an insert, and outer and inner protrusions. The union nut has a body and a pressing member. The inner sleeve has a through hole serving as a channel. The inner protrusion extends from the cylinder to an axial direction to contact the inner sleeve. The inner protrusion has a through hole serving as another channel connected with the inner sleeve's channel. The tip of the inner protrusion has an inner diameter not less than the minimum inner diameter of the inner sleeve. An inner peripheral surface is located at the inner periphery of the inner protrusion and causes it to reduce in inner diameter toward another axial direction.

Abstract: A resin tube fitting has a body with a sleeve allowing the longitudinal end of the tube to be put therein, an inner ring with a press-in portion configured to be pressed in the longitudinal end of the tube, and a union nut with a connector configured to be screwed to an outer periphery of the body to allow the longitudinal end of the tube to be put radially between the connector and the press-in portion. The inner ring and the union nut are made of resin, which has a property of contracting in response to change in ambient temperature. The radial contraction rate of the connector is higher by 0.05% or more than that of the press-in portion of the inner ring.

Abstract: A method for manufacturing a resin pipe joint with a joint body includes the following steps. Preparing a mold and a supply device configured to supply molten resin. The mold includes a first mold for an outer shape of the joint body and a second mold for an inner shape of the joint body. Combining the second mold with the first mold to form a cavity, into which the molten resin is injectable, inside the mold. Supplying the molten resin to the cavity in the mold. Solidifying the molten resin in the cavity after stop of the supply of the molten resin from the supply device. The second mold has a gap that connects the cavity to a discharge space outside the cavity and allows gas to flow.

Abstract: A structure for mounting a gasket on a block includes a block with a fluid channel and an annular gasket surrounding an opening of the fluid channel. The block has an annular inner wall and an annular outer wall. The annular inner wall is made of resin and located radially outside the opening of the fluid channel. The annular outer wall is made of resin and located radially outside the annular inner wall. The annular inner wall and the annular outer wall allow an axial side of the gasket to be press-fitted therebetween and are elastically deformable in their radial directions.

Abstract: A resin tube fitting has: a body with an outer sleeve; an inner ring including an insert portion insertable into the outer sleeve to contact the outer sleeve radially, and a press-in portion configured to be pressed into a longitudinal end of the tube; and a union nut configured to be engageable with the body. The body and the inner ring are made of resin, which has a property of contracting in response to change in ambient temperature. A radial contraction rate of the outer sleeve of the body is designed to be higher by 0.09% or more than that of the insert portion of the inner ring.

Abstract: A fitting assembly for fluid device is provided, which can reduce space for installation of fluid devices. The assembly includes a first port, a second port, a first annular member, a second annular member, and a connector. The first port is annular and installed at a first fluid device to be connected with its first fluid channel. The second port is annular and installed at a second fluid device to be connected with its second fluid channel. The first annular member is installed at the first port and has a first coupler. The second annular member is installed at the second port and has a second coupler to be coupled with the first coupler to fix the second annular member to the first annular member. The connector is installed between the first port and the second port and seals gaps between the connector and the first and second ports.

Abstract: A gasket for connecting flow passage holes formed in two piping blocks, respectively, includes, at both sides in an axial direction, a pair of tubular radially outer press-fitting portions configured to be respectively press-fitted into tubular radially outer sealing grooves formed, radially outward of the flow passage holes, on end surfaces of both piping blocks, and a sealing peripheral surface configured to come into close contact with an outer peripheral surface of the radially outer sealing groove to exert a sealing function is formed on an outer peripheral surface of each radially outer press-fitting portion. A groove portion is formed on an outer peripheral surface of the gasket such that, in a state where either one of the pair of radially outer press-fitting portions is press-fitted into a sealing groove of the piping block, the groove portion is open axially outward of the end surface of the piping block.

Abstract: An integrated block 1 serving as a fluid device includes: a flow port 13 open to form one end of a passage P; an annular groove 14 arranged along an outer circumferential edge of the flow port 13, the annular groove 14 being open so as to insert the gasket 2 therein; a first tapered portion 17 arranged on a radially-inner side interior wall 14b of the annular groove 14 and sloped radially outward from an open end of the annular groove 14 in a depth direction of the annular groove 14; and a guide 18 arranged on a radially-outer side interior wall 14a of the annular groove 14, extending throughout a predetermined range D from the open end of the annular groove 14 in the depth direction, and having a larger diameter than an outer circumferential surface 22a of a second sealing portion 22 of the gasket 2.

Abstract: A gasket-mounting structure includes a mounting member and a gasket. The mounting member includes a first base, an outer sleeve protruding from the first base, an inner sleeve protruding from the first base in the same direction of the outer sleeve radially inside the outer sleeve, and a groove surrounded by the first base, the outer sleeve, and the inner sleeve. The gasket includes an annular second base, an annular outer protrusion extending from the second base to be pressed in the groove, and an annular inner protrusion extending from the second base to be axially pressed on the inner sleeve radially inside the outer protrusion such that the inner sleeve is radially placed between the outer protrusion and the inner protrusion.

Abstract: A pipe joint, made of synthetic resin, including: an inner ring; a joint body having an annular sealing groove and a male screw portion formed on an outer circumference; a union nut having a female screw portion formed on an inner circumference to be tightened onto the male screw portion of the joint body, such that a first opposing surface is formed in the joint body to be perpendicular to an axial direction, and a second opposing surface is formed in the union nut to oppose the first opposing surface. An engagement projection is provided in one of the first opposing surface and the second opposing surface. An engagement recess is provided in the other of the first opposing surface and the second opposing surface such that the engagement projection engages with the engagement recess when the union nut has been tightened up to an appropriate position.

Abstract: Provided is a coating base material having a new configuration capable of enhancing the durability of a coating regardless of the adhesion strength of a primer. A coating base material 1 whose surface is subjected to application of a coating includes: a mesh-like valley portion 2 formed on the surface; and a plurality of island portions 3 formed on the surface and surrounded by the valley portion 2. Each island portion 3 has a crater-like recess 4 formed on an upper surface thereof.

Abstract: A structure of a resin-made pipe joint includes a sleeve which is press-insertable from one axial side into one longitudinal end portion of a flexible tube to flare the one longitudinal end portion to hold the flared state, a joint body which is couplable to the sleeve, and a union nut which is fastenable to the joint body to hold a state where the sleeve press-inserted into the one longitudinal end portion is coupled to the joint body. The sleeve has a taper-like first outer circumferential surface, a second outer circumferential surface having an outer diameter that is smaller than a maximum outer diameter of the first outer circumferential surface, and an annular step portion which is an annular step portion that is disposed between the first outer circumferential surface and the second outer circumferential surface and comprises an edge portion on a side of the first outer circumferential surface.