Abstract: A connector device comprises a connector and a mating connector. The connector and the mating connector are mateable with each other. The connector comprises a housing and a terminal. The housing is provided with an axis portion and a maintenance portion. The mating connector comprises a mating housing and a mating terminal. The mating housing is provided with a mating axis portion and a mating maintenance portion. One of the axis portion and the mating axis portion is a rotation axis with an axis direction. A remaining one of the axis portion and the mating axis portion is a bearing. The connector is rotatable around the rotation axis between an open position and a close position when the axis portion and the mating axis portion are combined with each other. The maintenance portion and the mating maintenance portion temporarily maintain a position of the connector at the open position.

Abstract: A method of improving corrosion resistance of a cylinder cover including a port that is an intake port or an exhaust port. The cylinder cover is configured such that an annular cooling water passage is formed between an inner peripheral surface of the port and a valve seat ring when the valve seat ring is inserted in the port. The method includes forming a weld overlay layer on each of sealed regions of the inner peripheral surface of the port by laser metal deposition using a welding material made of a nickel-based alloy, a copper alloy, stainless steel, or a titanium alloy, the sealed regions being positioned at both sides of the cooling water passage, respectively.

Abstract: A method of improving corrosion resistance of a cylinder cover including a port that is an intake port or an exhaust port. The cylinder cover is configured such that an annular cooling water passage is formed between an inner peripheral surface of the port and a valve seat ring when the valve seat ring is inserted in the port. The method includes forming a weld overlay layer on each of sealed regions of the inner peripheral surface of the port by laser metal deposition using a welding material made of a nickel-based alloy, a copper alloy, stainless steel, or a titanium alloy, the sealed regions being positioned at both sides of the cooling water passage, respectively.

Abstract: A connector device comprises a connector and a mating connector. The connector comprises a housing and a slider having a second regulated portion. The mating connector comprises a mating housing having a second regulation portion. The connector is movable between an open position and a closed position. The slider is held by the housing to be movable between a first position and a second position. When the connector is moved to a predetermined position together with the slider which is located at the second position upon a movement of the connector from the closed position toward the open position, the second regulated portion is brought into abutment with the second regulation portion, and a movement of the connector toward the open position beyond the predetermined position is regulated. When the slider is moved to the first position, the connector is movable to the open position.

Abstract: A connector device comprises a connector and a mating connector. The connector comprises a housing and a slider having a second regulated portion. The mating connector comprises a mating housing having a second regulation portion. The connector is movable between an open position and a closed position. The slider is held by the housing to be movable between a first position and a second position. When the connector is moved to a predetermined position together with the slider which is located at the second position upon a movement of the connector from the closed position toward the open position, the second regulated portion is brought into abutment with the second regulation portion, and a movement of the connector toward the open position beyond the predetermined position is regulated. When the slider is moved to the first position, the connector is movable to the open position.

Abstract: Provided is an alkaline water electrolyzer in which leakage of aqueous alkali solutions is prevented. The alkaline water electrolyzer 10 includes an anode chamber frame 11 defining an anode chamber 12; a cathode chamber frame 17 defining a cathode chamber 18; a porous diaphragm 16 disposed between the anode and cathode chamber frames 11 and 17 and partitioning the anode and cathode chambers 12 and 18; an anode gasket 15 disposed on the anode chamber frame 11; and a cathode gasket 21 disposed on the cathode chamber frame 17, wherein when the anode and cathode chamber frames 11 and 17 are fastened, the porous diaphragm 16 is held between the anode and cathode chamber frames 11 and 17 via the anode and cathode gaskets 15 and 21 and the anode and cathode gaskets 15 and 21 are in contact with each other around the peripheral edge of the porous diaphragm 16 by compressing the anode and cathode gaskets 15 and 21.

Abstract: A diaphragm includes a porous supporting body and a polymer porous membrane. When one of surfaces of the porous membrane is defined as a surface A, the other surface opposite to the surface A is defined as a surface B, a section of the porous membrane parallel to the surfaces A and B is defined as a section C, an average pore diameter on the surface A is defined as an average pore diameter DA, an average pore diameter on the surface B is defined as an average pore diameter DB, and an average pore diameter on the section C is defined as an average pore diameter DC, the average pore diameters DA and DB are substantially equal to each other, and the average pore diameter DC is larger than each of the average pore diameters DA and DB.

Abstract: Provided are an anode for alkaline water electrolysis that can achieve a low overpotential at low cost, and a method for producing the anode for alkaline water electrolysis. An anode for alkaline water electrolysis having electrode catalyst layers 2, 3 composed of a first catalyst component having either a nickel-cobalt spinel oxide or a lanthanide-nickel-cobalt perovskite oxide and a second catalyst component having at least one of iridium oxide and ruthenium oxide formed on the surface of a conductive substrate 1 composed of nickel or a nickel-based alloy, and a method for producing the anode for alkaline water electrolysis.

Abstract: Provided is an alkaline water electrolyzer in which leakage of aqueous alkali solutions is prevented. The alkaline water electrolyzer 10 includes an anode chamber frame 11 defining an anode chamber 12; a cathode chamber frame 17 defining a cathode chamber 18; a porous diaphragm 16 disposed between the anode and cathode chamber frames 11 and 17 and partitioning the anode and cathode chambers 12 and 18; an anode gasket 15 disposed on the anode chamber frame 11; and a cathode gasket 21 disposed on the cathode chamber frame 17, wherein when the anode and cathode chamber frames 11 and 17 are fastened, the porous diaphragm 16 is held between the anode and cathode chamber frames 11 and 17 via the anode and cathode gaskets 15 and 21 and the anode and cathode gaskets 15 and 21 are in contact with each other around the peripheral edge of the porous diaphragm 16 by compressing the anode and cathode gaskets 15 and 21.

Abstract: Provided are an anode for alkaline water electrolysis that can achieve a low overpotential at low cost, and a method for producing the anode for alkaline water electrolysis. An anode for alkaline water electrolysis having electrode catalyst layers 2, 3 composed of a first catalyst component having either a nickel-cobalt spinel oxide or a lanthanide-nickel-cobalt perovskite oxide and a second catalyst component having at least one of iridium oxide and ruthenium oxide formed on the surface of a conductive substrate 1 composed of nickel or a nickel-based alloy, and a method for producing the anode for alkaline water electrolysis.

Abstract: A railcar includes: an underframe including a pair of side sills located at both respective ends of the underframe in a car width direction and extending in a car longitudinal direction and a plurality of cross beams coupling the pair of side sills to each other in a car width direction; and an underfloor cover covering an underfloor portion of the underframe. The underfloor cover includes upper and lower plate-shaped members (a shielding plate and a closing plate) made of stainless steel, and the upper and lower plate-shaped members are at least partially spaced apart from each other.

Abstract: A diaphragm includes a porous supporting body and a polymer porous membrane. When one of surfaces of the porous membrane is defined as a surface A, the other surface opposite to the surface A is defined as a surface B, a section of the porous membrane parallel to the surfaces A and B is defined as a section C, an average pore diameter on the surface A is defined as an average pore diameter DA, an average pore diameter on the surface B is defined as an average pore diameter DB, and an average pore diameter on the section C is defined as an average pore diameter DC, the average pore diameters DA and DB are substantially equal to each other, and the average pore diameter DC is larger than each of the average pore diameters DA and DB.

Abstract: A contact increased in contact reliability by suppressing variation in contact area between the contact and a mating contact. A contact body including a contact portion that is brought into contact with a contact portion of a male-side contact, and a supporting member formed separate from the contact body, for receiving therein the contact portion and movably supporting the contact portion form a female-side contact. The supporting member includes a supporting member body for receiving therein the contact portion and the contact portion, first and second spring portions and provided on the supporting member body, for bringing the contact portion inserted in the supporting member body and the contact portion into contact with each other, and restricting portions provided on the supporting member body, for restricting movement of the male-side contact in a spring portion-bending direction of the first and second spring portions.

Abstract: A connector comprises a housing, a contact and a connection structure. The connection structure is a structure other than the housing and comprises a conductive member, a protection portion and an electric-shock prevention portion. The conductive member has a first end portion and a second end portion. The first end portion is attached to or integrally formed with the contact. The protection portion covers a part of the conductive member, which is positioned between the first end portion and the second end portion. The housing has an accommodation portion formed therewithin. The accommodation portion has an opening. The contact is accommodated in the accommodation portion together with the first end portion of the conductive member. The electric-shock prevention portion, at least in part, blocks the opening of the accommodation portion and obstructs entrance of a finger into the accommodation portion beyond the electric-shock prevention portion.

Abstract: A connector comprises a housing, a contact and a connection structure. The connection structure is a structure other than the housing and comprises a conductive member, a protection portion and an electric-shock prevention portion. The conductive member has a first end portion and a second end portion. The first end portion is attached to or integrally formed with the contact. The protection portion covers a part of the conductive member, which is positioned between the first end portion and the second end portion. The housing has an accommodation portion formed therewithin. The accommodation portion has an opening. The contact is accommodated in the accommodation portion together with the first end portion of the conductive member. The electric-shock prevention portion, at least in part, blocks the opening of the accommodation portion and obstructs entrance of a finger into the accommodation portion beyond the electric-shock prevention portion.

Abstract: A connector device comprises a connector and a mating connector connectable with each other. The mating connector comprises a mating primary terminal and a mating secondary terminal. The connector comprises a primary terminal, a secondary terminal, an operation member and a push-back mechanism. The operation member changes its state from an initial state to a second state via a second state. When the state of the operation member is changed to the first state, the primary terminal is connected to the mating primary terminal. When the state of the operation member is changed to the second state, the secondary terminal is connected to the mating secondary terminal. When the state of the operation member is changed to the first state, the push-back mechanism applies a push-back force to the operation member to change the state of the operation member back toward the initial state.

Abstract: An alkaline water electrolysis diaphragm includes: a polymer porous layer containing at least one polymer compound selected from polyether sulfone having a contact angle of 20 to 90° and polysulfone having the contact angle of 20 to 90°; and an organic fiber fabric layer coupled to the polymer porous layer. The polyether sulfone having the contact angle of 20 to 90° is at least one polymer compound selected from the group made of polyether sulfone, hydrophilic polyether sulfone, cationic polyether sulfone, and cationic hydrophilic polyether sulfone. The polysulfone having the contact angle of 20 to 90° is at least one polymer compound selected from the group made of polysulfone, hydrophilic polysulfone, cationic polysulfone, and cationic hydrophilic polysulfone.

Abstract: A railcar includes: an underframe including a pair of side sills located at both respective ends of the underframe in a car width direction and extending in a car longitudinal direction and a plurality of cross beams coupling the pair of side sills to each other in a car width direction; and an underfloor cover covering an underfloor portion of the underframe. The underfloor cover includes upper and lower plate-shaped members (a shielding plate and a closing plate) made of stainless steel, and the upper and lower plate-shaped members are at least partially spaced apart from each other.