Abstract: The present invention makes a proposal of a heating component for a pipe joint which can be easily mounted on a pipe joint and also can stabilize the assembly quality to the pipe joint. The heating component for a pipe joint is characterized in that the heating component for a pipe joint has partially thereon fitting portions each having an inner face shape fitted with a part of an outer shape of the pipe joint, and also, a holding recess portion for holding therein a heating wire is formed on an inner face portion other than the fitting portions; when the heating wire is held in the holding recess portion, and then, the heating component for piping joint is mounted to the joint by fitting the fitting portions with the parts of the outer shape of the joint, the heating wire held in the holding recess portion comes in contact with the pipe joint.

Abstract: A quick connector includes a female pipe having a flange in the outer peripheral part thereof, a male pipe having a retainer mounting part, and a retainer slidably mounted on the retainer mounting part of the male pipe to slide at a right angle to the axial direction of the male pipe, in which the female pipe and the male pipe are connected with each other by the retainer holding the flange of the female pipe, and the retainer is allowed to move from a temporarily fixed position to a completely pushed-in position on the retainer mounting part only when the female pipe and the male pipe are in a completely connected state, so that a worker can easily and reliably check whether the pipes are in an incompletely connected state or in a completely connected state by means of hand feeling only without relying on a visual check.

Abstract: A connection structure for a resin pipe, in which leakage of fluid from between a metal pipe and the resin pipe fitted on the metal pipe is prevented for a long time. In the connection structure, at least two diameter-expanded sections (10, 11) are formed with a spacing on an end region of a metal pipe (1), the spacing between the two diameter-expanded sections (10, 11) functioning as a circumferential groove (12) in which a seal ring (SR) is received, and a resin tube (2) is fitted up to a position beyond a far side diameter-expanded section (11) of the two diameter-expanded sections (10, 11). A back ring (BR) is received in the circumferential groove (12) together with the seal ring (SR). The diameter-expanded sections (10, 11) of the metal tube (1) are formed by bulging or spool shape-forming process.

Abstract: A problem solved by this invention is to enable prevention of damage to a connector in a fluid transfer tube that is made by mounting a connector to an end of a tube, even when an outside air temperature falls below freezing point. The problem is solved as follows. In a fluid transfer tube that is made by mounting pipe joints to ends of a tube that has elasticity, tube connecting portions of the pipe joints and sections of the tube in the vicinity of the tube connecting portions are covered with heat radiation preventing covers to thereby delay freezing of a fluid inside the tube sections that are covered by the heat radiation preventing covers.

Abstract: A problem solved by this invention is to enable prevention of damage to a connector in a fluid transfer tube that is made by mounting a connector to an end of a tube, even when an outside air temperature falls below freezing point. The problem is solved as follows. In a fluid transfer tube that is made by mounting pipe joints to ends of a tube that has elasticity, tube connecting portions of the pipe joints and sections of the tube in the vicinity of the tube connecting portions are covered with heat radiation preventing covers to thereby delay freezing of a fluid inside the tube sections that are covered by the heat radiation preventing covers.

Abstract: A device having a tube for heating or heat retaining of fluid includes a first path in which a connection section of a cord heater led out of the tube and a lead wire connected to a power supply is provided, a second path provided between the tube and the first path, and a drainage path for removing leaked fluid of the second path. In this device, the connection section is sandwiched by a pair of first sealing members to retain a sealed state and the cord heater passes through the second path in a sealed state by a second sealing member. This device can effectively prevent gas or liquid from leaking into the space where the connection section of a lead wire and a cord heater is provided.

Abstract: A piping structure of a tube for heating or heat-retaining of fluid such as gas and liquid includes a conduit through which fluid is transported and a plurality of heater lines inserted into the conduit, in which the heater lines are connected in parallel. The piping structure is capable of transporting fluid over a long distance while heating the fluid or keeping the temperature of the heated fluid constant even when the total piping length is long.

Abstract: A quick connector includes a female pipe having a flange in the outer peripheral part thereof, a male pipe having a retainer mounting part, and a retainer slidably mounted on the retainer mounting part of the male pipe to slide at a right angle to the axial direction of the male pipe, in which the female pipe and the male pipe are connected with each other by the retainer holding the flange of the female pipe, and the retainer is allowed to move from a temporarily fixed position to a completely pushed-in position on the retainer mounting part only when the female pipe and the male pipe are in a completely connected state, so that a worker can easily and reliably check whether the pipes are in an incompletely connected state or in a completely connected state by means of hand feeling only without relying on a visual check.

Abstract: A connection structure for a lead wire and a heater wire includes a tube member, a body housed in the tube member in a watertight manner, a through hole extending in an axial direction of the tube member in the body, seal members respectively arranged at both sides of the through hole, and stopper members each having a hole formed coaxially with the through hole and allowing the seal members to be removably attached with respect to the body wherein the heater wire is extended into the body from a liquid side in such a manner as to pass through both the hole and the seal member at one side, the lead wire is extended out of the body toward an electric power supply to be connected with in such a manner as to pass through both the hole and the seal member at the other side, and a connecting section of the heater wire and the lead wire is located in a space of the through hole between the seal members.

Abstract: A heat-resistant plastic tube is mainly made of a polyester-based elastomer and exhibits a change amount in angle of ±10° or less in a shape retainability performance test, a change rate in inner diameter of ±2% or less in a dimensional stability performance test, a change rate in yield strength of ±30% or less in a flexibility retainability performance test. The heat-resistant plastic tube can be subjected to a thermal bending at a temperature in a use environment or higher and exhibits excellent retention of the bent shape through the thermal bending after being left in the use environment.

Abstract: A connection structure for a lead wire and a heater wire includes a tube member, a body housed in the tube member in a watertight manner, a through hole extending in an axial direction of the tube member in the body, seal members respectively arranged at both sides of the through hole, and stopper members each having a hole formed coaxially with the through hole and allowing the seal members to be removably attached with respect to the body wherein the heater wire is extended into the body from a liquid side in such a manner as to pass through both the hole and the seal member at one side, the lead wire is extended out of the body toward an electric power supply to be connected with in such a manner as to pass through both the hole and the seal member at the other side, and a connecting section of the heater wire and the lead wire is located in a space of the through hole between the seal members.

Abstract: A connection structure for a resin pipe, in which leakage of fluid from between a metal pipe and the resin pipe fitted on the metal pipe is prevented for a long time. In the connection structure, at least two diameter-expanded sections (10, 11) are formed with a spacing on an end region of a metal pipe (1), the spacing between the two diameter-expanded sections (10, 11) functioning as a circumferential groove (12) in which a seal ring (SR) is received, and a resin tube (2) is fitted up to a position beyond a far side diameter-expanded section (11) of the two diameter-expanded sections (10, 11). A back ring (BR) is received in the circumferential groove (12) together with the seal ring (SR). The diameter-expanded sections (10, 11) of the metal tube (1) are formed by bulging or spool shape-forming process.

Abstract: A resin tube for automotive piping is made of a resin composition containing 6,6-nylon, an impact improver, 6/6,6-copolymer nylon and a plasticizer with a proportion in a mass ratio of the 6,6-nylon:the impact improver:the 6/6,6-copolymer nylon:the plasticizer to be in a range of 100:5-40:5-50:3-20. The resin tube for automotive piping is manufactured by preparing the above resin composition and molding the composition into a tube by extraction. The 6,6-nylon and the impact improver are mixed together in advance and/or the 6/6,6-copolymer nylon and the plasticizer are mixed together in advance.

Abstract: A pure-water pipe for fuel cell has an innermost layer made of fluoro resin or polyolefin resin wherein an entire body of the pipe is made of resin and the pipe has a value of (a total thickness of the pipe)/(a thickness of the innermost layer) in a range of 1.1 to 40. The pure-water pipe further has a layer in the outside of the innermost layer which contains one of polyamide, polyester elastomer and polyolefin elastomer or a layer in the outside of the innermost layer which contains non-plastic polyamide. The pure-water pipe further has a low hydrogen-permeable layer in the outside of the innermost layer. The low hydrogen-permeable layer contains ethylene-vinyl alcohol copolymer, polymethaxyleneadipamide, or polybutylene naphthalate.

Abstract: A heat-resistant plastic tube is mainly made of a polyester-based elastomer and exhibits a change amount in angle of ±10° or less in a shape retainability performance test, a change rate in inner diameter of ±2% or less in a dimensional stability performance test, a change rate in yield strength of ±30% or less in a flexibility retainability performance test. The heat-resistant plastic tube can be subjected to a thermal bending at a temperature in a use environment or higher and exhibits excellent retention of the bent shape through the thermal bending after being left in the use environment.

Abstract: A tube for fuel transportation according to the present invention includes an innermost layer comprising one selected from the group consisting of fluorine type resins and polyamide type resins, a middle layer comprising a polyalkylene naphthalate resin, an outer layer comprising a thermoplastic resin or a thermoplastic elastomer, and an adhesive layer formed between the innermost layer and the middle layer. Polybutylene naphthalate may be used as the polyalkylene naphthalate resin. The tube for fuel transportation according to the present invention has excellent barrier action against fuels and is highly kink-proof.

Abstract: The connector includes a male member with an engaging portion on its outer face, a female member with an inner space for receiving the male member and a pair of manipulating members provided in the female member from opposite sides. The engaging portion of the male member is received through and behind the pair of manipulating members in the inner space. Each manipulating member has a part which enters the track region of the engaging portion and an elastic piece. The coupling of the male and female members is reliably obtained by two opposite side engagements between the engaging portion of the male member and the pair of manipulating members and maintained by the thrusting force by the elastic piece.

Abstract: A tube for fuel transportation according to the present invention includes an innermost layer comprising one selected from the group consisting of fluorine type resins and polyamide type resins, a middle layer comprising a polyalkylene naphthalate resin, an outer layer comprising a thermoplastic resin or a thermoplastic elastomer, and an adhesive layer formed between the innermost layer and the middle layer. Polybutylene naphthalate may be used as the polyalkylene naphthalate resin. The tube for fuel transportation according to the present invention has excellent barrier action against fuels and is highly kink-proof.

Abstract: A fuel transfer tube comprises an inner layer of hot-melt fluororesin and an outer layer of partial aromatic polyamide resin or ethylene-vinyl alcohol copolymer. The layer of hot-melt fluororesin reliably prevents alcohol from permeating into the tube, while gasoline is effectively prevented from permeating into the tube by the layer of partial aromatic polyamide resin or ethylene-vinyl alcohol copolymer. The fuel transfer tube, therefore, is suitable for transferring alcohol, gasoline and a mixture thereof.

Abstract: A fuel transfer tube is capable of being used reliably for transferring alcohol, gasoline, or the mixure thereof. The fuel transfer tube has a polyamide resin layer containing metaxylene group, thickness of which is 0.3mm or less, and a polyolefin resin layer. The tube is formed by simultaneous extrusion method.