Abstract: A carbody of a railcar includes: a roof bodyshell; a supporting body provided under the roof bodyshell, the supporting body being attached to the roof bodyshell in a state of being positioned in the vertical direction; a rotating body which is threadedly engaged with the supporting body and rotates relative to the supporting body about an axis extending in a vertical direction to be displaced relative to the supporting body in the vertical direction; and a support target member supported by the roof bodyshell through the supporting body and the rotating body, the support target member being attached to the rotating body in a state of being positioned in the vertical direction, a vertical distance between the roof bodyshell and the support target member being adjustable by displacement of the rotating body relative to the supporting body.

Abstract: A carbody of a railcar includes: a roof bodyshell; a supporting body provided under the roof bodyshell, the supporting body being attached to the roof bodyshell in a state of being positioned in the vertical direction; a rotating body which is threadedly engaged with the supporting body and rotates relative to the supporting body about an axis extending in a vertical direction to be displaced relative to the supporting body in the vertical direction; and a support target member supported by the roof bodyshell through the supporting body and the rotating body, the support target member being attached to the rotating body in a state of being positioned in the vertical direction, a vertical distance between the roof bodyshell and the support target member being adjustable by displacement of the rotating body relative to the supporting body.

Abstract: A door main body includes a through hole formed on an end surface located at an end of the door main body in a rotation axis direction of rotation of the door main body, a cable or a hose being inserted through the through hole. A door frame portion includes: a frame opening portion which is formed on a surface opposed to the through hole and has a shape corresponding to a movement trajectory of the through hole when the door main body is opened or closed; and a slide supporting member supporting the cable or the hose extending through the frame opening portion while sliding relative to the frame opening portion.

Abstract: A railcar door apparatus includes: a side sliding door that opens and closes an opening of a side bodyshell of a railcar; a first elastic member attached vertically to an end of the door; and a second elastic member opposed to the first so they do not touch when the door is closed. The first elastic member includes a first base portion and a first projecting wall portion projecting from the base toward the second elastic member; the second elastic member includes a second base portion and a second projecting wall portion projecting from the base toward the first elastic member; when the door is closed, a gap space is formed between the first and second elastic members, and the projecting wall portions overlap; and vertical grooves or projections are formed on the outside of at least one of the projecting wall portions, the outer surface facing the gap space.

Abstract: A door main body includes a through hole formed on an end surface located at an end of the door main body in a rotation axis direction of rotation of the door main body, a cable or a hose being inserted through the through hole. A door frame portion includes: a frame opening portion which is formed on a surface opposed to the through hole and has a shape corresponding to a movement trajectory of the through hole when the door main body is opened or closed; and a slide supporting member supporting the cable or the hose extending through the frame opening portion while sliding relative to the frame opening portion.

Abstract: A railcar door apparatus includes: a side sliding door that opens and closes an opening of a side bodyshell of a railcar; a first elastic member attached vertically to an end of the door; and a second elastic member opposed to the first so they do not touch when the door is closed. The first elastic member includes a first base portion and a first projecting wall portion projecting from the base toward the second elastic member; the second elastic member includes a second base portion and a second projecting wall portion projecting from the base toward the first elastic member; when the door is closed, a gap space is formed between the first and second elastic members, and the projecting wall portions overlap; and vertical grooves or projections are formed on the outside of at least one of the projecting wall portions, the outer surface facing the gap space.

Abstract: A glow plug with combustion pressure sensor is disclosed having a cover and a housing with which a piezoelectric element is hermetically accommodated. A lead wire having flexibility is employed to supply electric power to a heating member. The lead wire, fixedly connected to the heating member, extends through an insertion bore of the cover and is hermetically bonded to an inner circumferential wall of the insertion bore. When the heating member is axially displaced upon receipt of a combustion pressure, the lead wire flexes to absorb the resulting displacement, causing a joint portion between the cover and the lead wire to have no drag against the displacement. This allows the piezoelectric element to detect the combustion pressure with high precision.

Abstract: A glow plug with combustion pressure sensor is disclosed having a cover and a housing with which a piezoelectric element is hermetically accommodated. A lead wire having flexibility is employed to supply electric power to a heating member. The lead wire, fixedly connected to the heating member, extends through an insertion bore of the cover and is hermetically bonded to an inner circumferential wall of the insertion bore. When the heating member is axially displaced upon receipt of a combustion pressure, the lead wire flexes to absorb the resulting displacement, causing a joint portion between the cover and the lead wire to have no drag against the displacement. This allows the piezoelectric element to detect the combustion pressure with high precision.

Abstract: A gas sensor is disclosed including a gas-concentration detecting element, a casing accommodating the gas-concentration detecting element, a lead wire delivering a detected voltage potential to an outside, an insulator holding the lead wire in electrical relationship with respect to the housing, a columnar elastic sealing member, air holes formed in the casing for admitting atmospheric air to an inside thereof, and a water repellent filter. The water repellent filter, formed in a cylindrical shape, is disposed between the casing and the insulator, and a cylindrical elastic member is disposed in at least one of an area between the water repellent filter and the casing and another area between the water repellent filter and the insulator. With the casing caulked, the water repellent filter and the cylindrical elastic member are fixed in place.

Abstract: Disclosed is a belt conveyor capable of greatly reducing friction resistance between side portions of a belt and troughs, comprising troughs (5), a belt moving above the troughs (5) along a longitudinal direction thereof, belt bending members (12) provided outside on both sides of the belt in the width direction so as to be located upstream of an entrance (5a) of the troughs, for abutting with both side portions of the belt to be bent upwardly, load cells (14) for detecting a reactive force exerted by the belt with which the belt bending members (12) make contact, guide rails (16) engaged to cause the belt bending members (12) to be displaced to be fixed at a desired position so as to bend the side portions of the belt or restore the bent belt, and rails (20) for moving the guide rails (16) along the longitudinal direction of the belt.

Abstract: Disclosed is a belt conveyor capable of greatly reducing friction resistance between side portions of a belt and troughs, comprising troughs (5), a belt moving above the troughs (5) along a longitudinal direction thereof, belt bending members (12) provided outside on both sides of the belt in the width direction so as to be located upstream of an entrance (5a) of the troughs, for abutting with both side portions of the belt to be bent upwardly, load cells (14) for detecting a reactive force exerted by the belt with which the belt bending members (12) make contact, guide rails (16) engaged to cause the belt bending members (12) to be displaced to be fixed at a desired position so as to bend the side portions of the belt or restore the bent belt, and rails (20) for moving the guide rails (16) along the longitudinal direction of the belt.

Abstract: A spark plug is provided which is designed to be compact without sacrificing a mechanical strength of a porcelain insulator. The spark plug includes a metal shell having a base end and a top end. The porcelain insulator is made of a hollow cylinder which includes a body and an insulator head. The body is retained within the metal shell. The insulator head extends from the base end of the metal shell in a lengthwise direction of the porcelain insulator and has a length made up of a major body leading to the body of the porcelain insulator and an end portion lying far away from the body. The major body has an outer diameter D1, an inner diameter D2, and a section modulus Z at a smallest-outer diameter portion thereof which meet relations of 7.1 mm?D1?8.8 mm, D2?2.8 mm, and Z?33 mm3.

Abstract: Disclosed is a belt conveyor capable of greatly reducing friction resistance between side portions of a belt and troughs, comprising troughs (5), a belt moving above the troughs (5) along a longitudinal direction thereof, belt bending members (12) provided outside on both sides of the belt in the width direction so as to be located upstream of an entrance (5a) of the troughs, for abutting with both side portions of the belt to be bent upwardly, load cells (14) for detecting a reactive force exerted by the belt with which the belt bending members (12) make contact, guide rails (16) engaged to cause the belt bending members (12) to be displaced to be fixed at a desired position so as to bend the side portions of the belt or restore the bent belt, and rails (20) for moving the guide rails (16) along the longitudinal direction of the belt.

Abstract: Disclosed is a belt conveyor capable of greatly reducing friction resistance between side portions of a belt and troughs, comprising troughs (5), a belt moving above the troughs (5) along a longitudinal direction thereof, belt bending members (12) provided outside on both sides of the belt in the width direction so as to be located upstream of an entrance (5a) of the troughs, for abutting with both side portions of the belt to be bent upwardly, load cells (14) for detecting a reactive force exerted by the belt with which the belt bending members (12) make contact, guide rails (16) engaged to cause the belt bending members (12) to be displaced to be fixed at a desired position so as to bend the side portions of the belt or restore the bent belt, and rails (20) for moving the guide rails (16) along the longitudinal direction of the belt.

Abstract: A spark plug is provided which is designed to be compact without sacrificing a mechanical strength of a porcelain insulator. The spark plug includes a metal shell having a base end and a top end. The porcelain insulator is made of a hollow cylinder which includes a body and an insulator head. The body is retained within the metal shell. The insulator head extends from the base end of the metal shell in a lengthwise direction of the porcelain insulator and has a length made up of a major body leading to the body of the porcelain insulator and an end portion lying far away from the body. The major body has an outer diameter D1, an inner diameter D2, and a section modulus Z at a smallest-outer diameter portion thereof which meet relations of 7.1 mm?D1?8.8 mm, D2?2.8 mm, and Z?33 mm3.

Abstract: Disclosed is a belt conveyor capable of greatly reducing friction resistance between side portions of a belt and troughs, comprising troughs (5), a belt moving above the troughs (5) along a longitudinal direction thereof, belt bending members (12) provided outside on both sides of the belt in the width direction so as to be located upstream of an entrance (5a) of the troughs, for abutting with both side portions of the belt to be bent upwardly, load cells (14) for detecting a reactive force exerted by the belt with which the belt bending members (12) make contact, guide rails (16) engaged to cause the belt bending members (12) to be displaced to be fixed at a desired position so as to bend the side portions of the belt or restore the bent belt, and rails (20) for moving the guide rails (16) along the longitudinal direction of the belt.

Abstract: Ir alloy firing tips are bonded on opposed surfaces of a center electrode and a ground electrode facing to a discharge gap. The configuration of a cross-sectional area of the Ir alloy firing tip taken along a plane perpendicular to the axis of the Ir alloy firing tip is out of round. In this cross-sectional area of this Ir alloy firing tip, when it is assumed that a circumscribed circle has a largest diameter A among virtual circles each contacting at least three portions of a visible outline of the cross-sectional area and an inscribed circle has a largest diameter B among inscribed circles each being coaxial with the circumscribed circle, a ratio of the diameter B to the diameter A (i.e., B/A) is equal to or larger than 0.8 and is less than 1.0.

Abstract: Ir alloy firing tips are bonded on opposed surfaces of a center electrode and a ground electrode facing to a discharge gap. The configuration of a cross-sectional area of the Ir alloy firing tip taken along a plane perpendicular to the axis of the Ir alloy firing tip is out of round. In this cross-sectional area of this Ir alloy firing tip, when it is assumed that a circumscribed circle has a largest diameter A among virtual circles each contacting at least three portions of a visible outline of the cross-sectional area and an inscribed circle has a largest diameter B among inscribed circles each being coaxial with the circumscribed circle, a ratio of the diameter B to the diameter A (i.e., B/A) is equal to or larger than 0.8 and is less than 1.0.

Abstract: An object of the present invention is to provide a spark plug gasket (provided on the outer surface of the metal member of a spark plug) which assures a sealing between the spark plug and engine head by elastically deforming itself during screwing in the spark plug into an engine head and at the same time does not easily suffer an plastic deformation during driving the engine. The two requirements for assuring the close contact capability and suppressing the plastic deformation are simultaneously satisfied by a twice or three-times bent gasket with Hv0.5 of greater than or equal to 200 and smaller than or equal to 400. particularly, the twice bent gasket of the thickness of the gasket plate itself of 0.3 mm and made of SUS 304 of Hv0.5 of 350 did hardly suffer a loss of springiness under 50 G vibration.

Abstract: Disclosed is a belt conveyor capable of greatly reducing friction resistance between side portions of a belt and troughs, comprising troughs (5), a belt moving above the troughs (5) along a longitudinal direction thereof, belt bending members (12) provided outside on both sides of the belt in the width direction so as to be located upstream of an entrance (5a) of the troughs, for abutting with both side portions of the belt to be bent upwardly, load cells (14) for detecting a reactive force exerted by the belt with which the belt bending members (12) make contact, guide rails (16) engaged to cause the belt bending members (12) to be displaced to be fixed at a desired position so as to bend the side portions of the belt or restore the bent belt, and rails (20) for moving the guide rails (16) along the longitudinal direction of the belt.