Abstract: The present invention relates to a method for producing a metal nitride, which is a method for synthesizing a metal nitride by igniting a raw material powder containing a metal powder housed in a reaction vessel (2) under a nitrogen atmosphere and propagating nitriding combustion heat of the metal powder to the whole of the housed raw material powder, characterized in that the raw material powder is housed in the reaction vessel (2) as a molded body (1B) having a void ratio of 40 to 70%. According to the present invention, it is possible to provide a method for producing a metal nitride capable of suppressing the occurrence of powder scattering and improving the recovery rate of the metal nitride.

Abstract: The present invention relates to a method for producing a metal nitride by igniting a raw material powder containing a metal powder filled in a reaction vessel under a nitrogen atmosphere and propagating nitriding combustion heat generated by a nitriding reaction of the metal to the whole raw material powder, the method including forming a heat insulating layer made of a material having nitrogen permeability and inert to the nitriding reaction on an upper surface of a layer made of the raw material powder. According to the present invention, it is possible to provide a method for reducing the amount of unreacted metal powder when producing a metal nitride by a combustion synthesis method.

Abstract: A speaker disposition structure comprises a hinge pillar extending in a vehicle up-down direction; a side sill extending in a vehicle front-rear direction; a speaker box fixed to the hinge pillar; and a gap portion for arranging a vehicle component at an upper part of a vehicle-interior side of the side sill. The speaker box includes an abutting part abutting the hinge pillar; an upper space portion that bulges inward in a vehicle width direction from the abutting part above the gap portion and that holds a speaker; and an extended space portion that extends downward from the upper space portion and is adjacent to a vehicle-width-direction inner side of the gap portion. A dimension in a cross section orthogonal to the vehicle front-rear direction is smaller in a lower portion of the extended space portion than in an upper portion of the extended space portion.

Abstract: A speaker disposition structure comprises a hinge pillar extending in a vehicle up-down direction; a side sill extending in a vehicle front-rear direction; a speaker box fixed to the hinge pillar; and a gap portion for arranging a vehicle component at an upper part of a vehicle-interior side of the side sill. The speaker box includes an abutting part abutting the hinge pillar; an upper space portion that bulges inward in a vehicle width direction from the abutting part above the gap portion and that holds a speaker; and an extended space portion that extends downward from the upper space portion and is adjacent to a vehicle-width-direction inner side of the gap portion. A dimension in a cross section orthogonal to the vehicle front-rear direction is smaller in a lower portion of the extended space portion than in an upper portion of the extended space portion.

Abstract: A speaker disposition structure of a vehicle comprises a left hinge pillar and a right hinge pillar both extending in a vehicle up-down direction; a speaker box fixed to a lower portion of one of the left and right hinge pillars, and the speaker box having a closed inner space; and a partition located on a vehicle width direction inner side of the speaker box. A port opening connects with the inner space of the speaker box and is located in a front face of the speaker box. A space portion is surrounded by the front face of the speaker box, the dash panel, the hinge pillar, and the partition. The space portion connects with an occupant space of the space portion. A length of the space portion, from the port opening in a front-rear direction of the vehicle, is greater than a maximum length of the port opening.

Abstract: To a hinge pillar including a hinge pillar inner and a hinge pillar outer that form a closed cross-section extending vertically, a speaker box configured to hold and house a speaker therein is joined and fixed. As necessary, the speaker box includes a box part formed of a sheet metal member including a bottom and side walls that form a housing space housing the speaker, together with the bottom. The box part is arranged in the opening, with the bottom located in the closed cross-section and with the housing space open inside a vehicle cabin, and is joined to an edge of the opening.

Abstract: To a hinge pillar including a hinge pillar inner and a hinge pillar outer that form a closed cross-section extending vertically, a speaker box configured to hold and house a speaker therein is joined and fixed. As necessary, the speaker box includes a box part formed of a sheet metal member including a bottom and side walls that form a housing space housing the speaker, together with the bottom. The box part is arranged in the opening, with the bottom located in the closed cross-section and with the housing space open inside a vehicle cabin, and is joined to an edge of the opening.

Abstract: A sound system for a vehicle driven by an engine is provide, which includes an audio device for an internal space of a cabin of the vehicle, and a traveling state determiner configured to determine a traveling state of the vehicle. The audio device is configured to change a quality of a sound reproduced by a sound source and, when the traveling state determined by the traveling state determiner is a given traveling state, degrade the quality of the reproduced sound.

Abstract: A sound system for a vehicle including an engine and an audio device for an internal space of a cabin as sound sources disposed at given positions of the vehicle is provided. The audio device is switchable between a first mode in which an audio sound including both an audible sound and an inaudible sound for a human is reproduced in the cabin and a second mode in which an audio sound including the audible sound but not including the inaudible sound is reproduced in the cabin. The sound system includes a traveling state detector configured to detect a traveling state of the vehicle, and a switch controlling module executable by a processor configured to reproduce the audio sound in the first mode under a condition that a given traveling state is detected by the traveling state detector.

Abstract: A sound system for a vehicle including an engine and an audio device for an internal space of a cabin as sound sources disposed at given positions of the vehicle is provided. The audio device is switchable between a first mode in which an audio sound including both an audible sound and an inaudible sound for a human is reproduced in the cabin and a second mode in which an audio sound including the audible sound but not including the inaudible sound is reproduced in the cabin. The sound system includes a traveling state detector configured to detect a traveling state of the vehicle, and a switch controlling module executable by a processor configured to reproduce the audio sound in the first mode under a condition that a given traveling state is detected by the traveling state detector.

Abstract: A sound system for a vehicle driven by an engine is provide, which includes an audio device for an internal space of a cabin of the vehicle, and a traveling state determiner configured to determine a traveling state of the vehicle. The audio device is configured to change a quality of a sound reproduced by a sound source and, when the traveling state determined by the traveling state determiner is a given traveling state, degrade the quality of the reproduced sound.

Abstract: An apparatus for manufacturing a reinforcing cloth of a seat pad which includes: a mold for fixing a sheet and having an outer shape substantially identical to a shape of the reinforcing cloth and provided with a plurality of air holes interconnecting an internal space with an outer surface; a closed space between the mold and a cover member formed by covering the sheet fixed on the mold with the cover member; a heating unit for heating the sheet; and an exhausting unit for exhausting air from the closed space is provided.

Abstract: A method of manufacturing a reinforcing cloth of a seat pad includes: fixing a sheet on a mold having an outer shape substantially identical to a shape of the reinforcing cloth and provided with a plurality of air holes interconnecting an internal space with an outer surface; forming a closed space between the mold and a cover member by covering the sheet fixed on the mold with the cover member; heating the sheet; shaping the heated sheet into a shape following the outer shape of the mold by exhausting air from the closed space through the air holes; and demolding the sheet from the mold after removing the cover member.

Abstract: A method of manufacturing a reinforcing cloth of a sheet pad includes: fixing a sheet on a mold having an outer shape substantially identical to a shape of the reinforcing cloth and provided with a plurality of air holes interconnecting an internal space with an outer surface; forming a closed space between the mold and a cover member by covering the sheet fixed on the mold with the cover member; heating the sheet; shaping the heated sheet into a shape following the outer shape of the mold by exhausting air from the closed space through the air holes; and demolding the sheet from the mold after removing the cover member.

Abstract: A method of manufacturing a reinforcing cloth of a sheet pad includes: fixing a sheet on a mold having an outer shape substantially identical to a shape of the reinforcing cloth and provided with a plurality of air holes interconnecting an internal space with an outer surface; forming a closed space between the mold and a cover member by covering the sheet fixed on the mold with the cover member; heating the sheet; shaping the heated sheet into a shape following the outer shape of the mold by exhausting air from the closed space through the air holes; and demolding the sheet from the mold after removing the cover member.