Abstract: A heat exchanger includes a header part that is arranged on an outer surface side of a sidewall part of a case into which a combustion gas is supplied, and has hole parts through which end parts of heat transfer tubes are inserted and forms a chamber communicating between insides of the heat transfer tubes. The heat exchanger further includes a burring part in a tubular shape that protrudes from a circumferential edge part of each hole part of the header part toward the sidewall part side and is externally fitted to the end part of each heat transfer tube, and an extension part that partially extends from a part of a tip circumferential edge part of the burring part toward the sidewall part side and has a tip part abutting against the sidewall part.

Abstract: A tape cassette that includes a box-shaped cassette case whose outline being defined by a bottom wall, a top wall, and a side wall and including a plurality of corner portions, at least one tape contained within a tape containment area defined within the outline, a pair of cavities extending from the bottom wall and being provided between the tape containment area and the outline at opposite ends of a diagonal line connecting one of the corner portions to another of the corner portions, and a side face indicator portion provided in the side wall, indicating a type of the tape, and including a plurality of indicator portions disposed in a pattern in accordance with the type of the tape, each of the indicator portions being one of a switch hole and a surface portion.

Abstract: A tape cassette that includes a box-shaped cassette case whose outline being defined by a bottom wall, a top wall, and a side wall and including a plurality of corner portions, at least one tape contained within a tape containment area defined within the outline, a pair of cavities extending from the bottom wall and being provided between the tape containment area and the outline at opposite ends of a diagonal line connecting one of the corner portions to another of the corner portions, and a side face indicator portion provided in the side wall, indicating a type of the tape, and including a plurality of indicator portions disposed in a pattern in accordance with the type of the tape, each of the indicator portions being one of a switch hole and a surface portion.

Abstract: A hunting and fishing gear includes a haft (1), a harpoon body (2) extending in a longitudinal direction of the haft (1) from one end of the haft (1), and a plurality of harpoon tips (3) extending in a lateral direction Y from one side portion of the harpoon body (2) in a direction intersecting the longitudinal direction X of the harpoon body (2), and a barb (5) or a come-off prevention section (11; 12) provided to protrude into a space part (4) from at least one of the harpoon tips (3) located in the space part (4). Therefore, when a person grips a handle (7) with the person's hand (17) to use the hunting and fishing gear by swinging it in the direction of an arrow Z, the plurality of harpoon tips easily pierce a prey.

Abstract: A heat exchanger includes a case, a first and second heat exchanger disposed inside the case, a partition member disposed inside the case, and a duct. The case has a first side wall and a second side wall spaced apart from and facing each other in a first direction, a third side wall and a fourth side wall spaced apart from and facing each other in a second direction orthogonal to the first direction, and a bottom wall. A gas outlet communicating with an interior of the case is formed in the first side wall. The first heat exchanger is farther from the bottom wall than the second heat exchanger in a third direction orthogonal to the first and second directions. The second heat exchanger includes meandering heat transfer tubes meandering within a plane orthogonal to the first direction and overlapping along the first direction.

Abstract: A heat exchanger includes: a casing into which heating gas is supplied; and a plurality of heat transfer tubes which are arranged in the casing, wherein the plurality of heat transfer tubes are set in a posture in which a plurality of straight tube portions are arranged in a direction intersecting a heating gas flow direction, are stacked a plurality of stages in the heating gas flow direction, and are distinguished into first and second heat transfer tubes respectively located on an upstream side and a downstream side in the heating gas flow direction, and wherein the second heat transfer tube is formed so that an outer diameter of the tube and an arrangement pitch of the plurality of straight tube portions are smaller than those of the first heat transfer tube.

Abstract: Provided is a knife facilitating haft replacement to suit a person's preference and purpose of use. On the front side of a tang 3 extending in the front-rear direction, a protrusion portion 7 capable of biting into a haft 50 made of, for example, a wooden rod such as a tree branch is provided so as to be separated from the tang 3 and protrude to the rear side of the tang 3. A first receiving portion 8 receiving the haft 50 with the protrusion portion 7 biting into the haft 50 is provided on the rear side of the tang 3. The end surface of one end portion of the haft 50 is bitten by being pushed in from the protruding end side of the protrusion portion 7 toward the front side of the tang 3. With the protrusion portion 7 biting into the haft 50, the other end portion side of the haft 50 extending to the rear side of the tang 3 is received by the first receiving portion 8. As a result, the haft 50 is attached to a knife 1.

Abstract: A hunting and fishing gear includes a haft (1), a harpoon body (2) extending in a longitudinal direction of the haft (1) from one end of the haft (1), and a plurality of harpoon tips (3) extending in a lateral direction Y from one side portion of the harpoon body (2) in a direction intersecting the longitudinal direction X of the harpoon body (2), and a barb (5) or a come-off prevention section (11; 12) provided to protrude into a space part (4) from at least one of the harpoon tips (3) located in the space part (4). Therefore, when a person grips a handle (7) with the person's hand (17) to use the hunting and fishing gear by swinging it in the direction of an arrow Z, the plurality of harpoon tips easily pierce a prey.

Abstract: A heat exchanger includes: a casing into which heating gas is supplied; and a plurality of heat transfer tubes which are arranged in the casing, wherein the plurality of heat transfer tubes are set in a posture in which a plurality of straight tube portions are arranged in a direction intersecting a heating gas flow direction, are stacked a plurality of stages in the heating gas flow direction, and are distinguished into first and second heat transfer tubes respectively located on an upstream side and a downstream side in the heating gas flow direction, and wherein the second heat transfer tube is formed so that an outer diameter of the tube and an arrangement pitch of the plurality of straight tube portions are smaller than those of the first heat transfer tube.

Abstract: A hunting and fishing gear includes a haft (1), a harpoon body (2) extending in a longitudinal direction of the haft (1) from one end of the haft (1), and a plurality of harpoon tips (3) extending in a lateral direction Y from one side portion of the harpoon body (2) in a direction intersecting the longitudinal direction X of the harpoon body (2), and a barb (5) or a come-off prevention section (11; 12) provided to protrude into a space part (4) from at least one of the harpoon tips (3) located in the space part (4). Therefore, when a person grips a handle (7) with the person's hand (17) to use the hunting and fishing gear by swinging it in the direction of an arrow Z, the plurality of harpoon tips easily pierce a prey.

Abstract: Spread of leaking combustion exhaust or the like is suppressed and a thermal fuse is made to operate in definitive fashion. A back flange is made to protrude so as to be directed toward a rear wall of an outer casing from a joint between a combustor casing and a heat exchanger casing to a location in the vicinity of the rear wall. A thermal fuse is arranged about the periphery of the heat exchanger casing so as to extend along a region near a protruding end edge of the back flange. The back flange is provided with a through hole, and combustion exhaust which leaks from the combustor casing is guided to the thermal fuse. A back flange which is similar thereto is installed at an upper location so as to straddle a tubing elbow. The two flanges are made to protrude beyond the tubing elbow.

Abstract: Spread of leaking combustion exhaust or the like is suppressed and a thermal fuse is made to operate in definitive fashion. A back flange is made to protrude so as to be directed toward a rear wall of an outer casing from a joint between a combustor casing and a heat exchanger casing to a location in the vicinity of the rear wall. A thermal fuse is arranged about the periphery of the heat exchanger casing so as to extend along a region near a protruding end edge of the back flange. The back flange is provided with a through hole, and combustion exhaust which leaks from the combustor casing is guided to the thermal fuse. A back flange which is similar thereto is installed at an upper location so as to straddle a tubing elbow. The two flanges are made to protrude beyond the tubing elbow.

Abstract: A camera supporting structure comprises a plurality of flexible legs (2) each of which has a leg supporting member (3) at an end thereof, a first member (4) and a second member (5) arranged parallel to each other at a spaced interval for supporting said flexible legs, and a camera attaching screw (1) for attaching the camera to the first member and the second member, said first member being placed adjacent to the camera attached and having an inner screw (42) engaging with said camera attaching screw. By screwing the camera attaching screw into the inner screw, the leg supporting members are supported between the first member and the second member. The camera is screwed onto the camera supporting structure by the camera attaching screw and abutted onto a setting place by bending the flexible legs. The flexible legs are adjustably bent to support the camera that is oriented toward a subject of the photograph.

Abstract: A keyless drill chuck includes a raising-and-lowering member which moves back and forth with reference to a shaft in order to secure a rear portion of the cutting tool, and jaws which grip the cutting tool in association with the movement of the raising-and-lowering member toward the jaws while the internal diameter of a circle defined by the jaws. The rear portion of the cutting tool is automatically gripped without the use of a chuck handle by means of a machining resistance transmitted to the jaws from the cutting tool and of the movement of the raising-and-lowering member caused by torsional torque transmitted to a shaft. A V-shaped recess is formed in the end of the raising-and-lowering member facing the jaws, so that the rear portion of the cutting tool can be removable, yet attached to the V-shaped recess.