Abstract: A water hydraulic test on test pipes having a wide range of sizes is conducted accurately, efficiently, and economically, by using a plurality of booster cylinders arranged in parallel with respect to a test pipe and having respective boosting ratios increasing in stages. A plurality of servo motor driven pumps arranged in parallel is used as a drive source for the plurality of booster cylinders. Before a water pressure on an output side of the booster cylinder reaches a pressure near a test pressure, the plurality of servo motor driven pumps operates simultaneously. Then, the plurality of servo motor driven pumps stops operating except one and the water pressure on the output side of the booster cylinder is increased to the test pressure by the one servo motor driven pump. During pressure increase, the plurality of booster cylinders is used in turn in order of increasing boosting ratio.

Abstract: A helical blade cutter including multiple linear blades attached to an outer circumferential surface of a round body having an outer surface formed into a cylindrical circumferential surface. The blades tilt to a given helix angle ? from a straight line on the outer circumferential surface parallel to a rotational central axis O. Blade attachment surfaces are formed on the outer circumferential surface of the round body at given intervals in the circumferential direction. The blade attachment surfaces tilt to an angle same as the helix angle ? of the blade while tilting to a rake angle ? in a direction of an elevation angle from a tangent to the outer circumferential surface. The blades are each attached to a blade attachment part through intervention of a chip holder that allows detachment of the blade.

Abstract: A water hydraulic test on test pipes having a wide range of sizes is conducted accurately, efficiently, and economically, by using a plurality of booster cylinders arranged in parallel with respect to a test pipe and having respective boosting ratios increasing in stages. A plurality of servo motor driven pumps arranged in parallel is used as a drive source for the plurality of booster cylinders. Before a water pressure on an output side of the booster cylinder reaches a pressure near a test pressure, the plurality of servo motor driven pumps operates simultaneously. Then, the plurality of servo motor driven pumps stops operating except one and the water pressure on the output side of the booster cylinder is increased to the test pressure by the one servo motor driven pump. During pressure increase, the plurality of booster cylinders is used in turn in order of increasing boosting ratio.

Abstract: A helical blade cutter including multiple linear blades attached to an outer circumferential surface of a round body having an outer surface formed into a cylindrical circumferential surface. The blades tilt to a given helix angle ? from a straight line on the outer circumferential surface parallel to a rotational central axis O. Blade attachment surfaces are formed on the outer circumferential surface of the round body at given intervals in the circumferential direction. The blade attachment surfaces tilt to an angle same as the helix angle ? of the blade while tilting to a rake angle ? in a direction of an elevation angle from a tangent to the outer circumferential surface. The blades are each attached to a blade attachment part through intervention of a chip holder that allows detachment of the blade.

Abstract: A squeeze roll stand includes a combination of a fixed portion installed at a joint position of an electric resistance welded pipe manufacturing line, in which squeeze rolls excluding left and right upper rolls are detachably assembled, and a movable portion overlying the fixed portion, inside which left and right upper rolls are detachably assembled, the movable portion being inclined, taking a back surface downstream side as a fulcrum point, toward a same side from an assembling position on the fixed portion to a retreat position to open an upper part of the fixed portion. The movable portion is driven and reciprocated between the assembling position and the retreat position with cylinder type actuators as a drive mechanism. At the retreat position, the movable portion overlies a bead grinding device arranged on the back surface downstream side of the fixed portion with a front surface facing upward.

Abstract: A compact tube clamping device for inspecting an electric resistance welded tube quality. A lifting/lowering base including a tube support body is provided onto a fixed base. Clamp claws sandwich the tube support body. A claw drive body lifting/lowering independently of the lifting/lowering base is provided in the lifting/lowering base. Opposite side portions of the claw drive body are connected to opposite clamp claws by links to turn the opposite clamp claws in closing directions by lowering with respect to the lifting/lowering base. A first drive mechanism for the lifting/lowering base and a second drive body for lifting/lowering the claw drive body are provided to the fixed base. A lowering stroke of the claw drive body necessary for closing operations of the clamp claws is partially born by lifting of the lifting/lowering base in transferring the tube, thereby suppressing the lowering stroke of the claw drive body.

Abstract: The present invention provides a compact tube clamping device 50 with a simple structure and used suitably for a hydraulic pressure tester for inspecting quality of an electric resistance welded tube. To achieve this object, a lifting/lowering base 52 including a tube support body 55 on itself is provided onto a fixed base 51 to be able to lift and lower. Clamp claws 56 are mounted in positions, between which the tube support body 55 of the lifting/lowering base 52 is sandwiched, to be able to turn. A claw drive body 58 for lifting and lowering independently of the lifting/lowering base 52 is provided in the lifting/lowering base 52. Opposite side portions of the claw drive body 58 are connected to the opposite clamp claws 56 by links 59 so as to turn the opposite clamp claws 56 in closing directions by lowering with respect to the lifting/lowering base 52.

Abstract: A squeeze roll stand includes a combination of a fixed portion installed at a joint position of an electric resistance welded pipe manufacturing line, in which squeeze rolls excluding left and right upper rolls are detachably assembled, and a movable portion overlying the fixed portion, inside which left and right upper rolls are detachably assembled, the movable portion being inclined, taking a back surface downstream side as a fulcrum point, toward a same side from an assembling position on the fixed portion to a retreat position to open an upper part of the fixed portion. The movable portion is driven and reciprocated between the assembling position and the retreat position with cylinder type actuators as a drive mechanism. At the retreat position, the movable portion overlies a bead grinding device arranged on the back surface downstream side of the fixed portion with a front surface facing upward.

Abstract: A male connector (10) is mounted to a case (C) of a device and includes a bolt (B) with a tightening portion (B1) to be engaged by a tool for screwing the bolt into a bolt hole (C2). A shield (20) includes an insertion hole (22) for receiving the bolt (B) and a bolt cap (40) covers the tightening portion (B1). A seat (21) is provided adjacent the insertion hole (22) and is sandwiched by an edge of the bolt hole (C2) and the tightening portion (B1) in the axial direction. A flange (B12) projects out from the tightening portion (B1). A mounting recess (D) is formed between the flange (B12) and the seat (21). A mounting portion (42) is mounted in the mounting recess (D) and engages the bolt cap (40) to hold the bolt cap (40) on the tightening portion (B1).

Abstract: An object of the invention is to provide a device and a method for controlling a welding angle which is capable of resolving restrictions occurred when a conventional float type welding angle control device is used to manufacture a welded pipe, and giving full play to the ability of such a float type welding angle control device, by adopting a new mechanism for supporting and adjusting a fin roll. When the welding angle is controlled by inserting the fin roll between opposing edges of a band steel at a position located in an upstream side of squeeze rolls, the fin roll is attached to a link mechanism in which two arms are coupled so as to be pivotable within a plane defined by a pipe manufacturing line direction and a perpendicular direction thereof, and positions of gripping points of the arms are changed to adjust a position of the fin roll within the plane.

Abstract: A male connector (10) is mounted to a case (C) of a device and includes a bolt (B) with a tightening portion (B1) to be engaged by a tool for screwing the bolt into a bolt hole (C2). A shield (20) includes an insertion hole (22) for receiving the bolt (B) and a bolt cap (40) covers the tightening portion (B1). A seat (21) is provided adjacent the insertion hole (22) and is sandwiched by an edge of the bolt hole (C2) and the tightening portion (B1) in the axial direction. A flange (B12) projects out from the tightening portion (B1). A mounting recess (D) is formed between the flange (B12) and the seat (21). A mounting portion (42) is mounted in the mounting recess (D) and engages the bolt cap (40) to hold the bolt cap (40) on the tightening portion (B1).

Abstract: A male connector (10) has a male terminal fitting (20) mounted in a male housing (10A). The male housing (10A) has tube (11) surrounding the male terminal fitting (20). The tube (11) is spaced out from a conductive part (23) of the male terminal fitting (20) by a distance so that a finger cannot be inserted between the tube (11) and the male terminal fitting (20). A fit-on part (31) of a female connector (30) can be inserted between the tube (11) and the male terminal fitting (20) so that a female terminal fitting (34) can contact the conductive part (23) of the male terminal fitting (20). An insulating coating (26) is formed on a front end of the male terminal fitting (20) by molding a resin to prevent shocks.

Abstract: A shielding connector apparatus includes an equipment-side shielding connector (50) with an equipment-side shielding housing (51) and an electric wire-side shielding connector (20) with an electric wire-side shielding housing (21). A connector fit-on nut (65) is formed on the equipment-side shielding housing (51). The electric wire-side shielding housing (21) has a fit-on bolt (39) that is screwed into the connector fit-on nut (65) to fit both shielding connectors together. An equipment-side contact surface (64) is formed on the equipment-side shielding housing (51). An electric wire-side contact surface (38) is formed on the electric wire-side shielding housing (21).

Abstract: A shielding connector has a housing (20) accommodating female terminals (15) connected to electric wires (10). The housing (20) is inserted in a die cast tubular shielding shell (40). An elastic locking piece (34) is provided on the housing (20) and locks an open edge (48) of the shielding shell (40) to prevent removal of the housing (20) that has been mounted properly in the housing (20). A retainer (50) is mounted on the housing (20) from the rear and prevents the elastic locking piece (34) from flexibly displacing in an unlocking direction. An open end (70A) of a braided wire (70) is placed on a mounting groove (46) formed on the shielding shell (40) and is fixed to the mounting groove (46) with a tightening band (60) whose diameter can be decreased with a tool.

Abstract: A connecting structure for relay terminals (10) made of enameled wires and adapted to electrically connect motor side terminals (51) provided on a motor (50) and inverter side terminals (61) provided on an inverter (60) includes motor side annular connecting portions (11) to be connected to the motor side terminals (51), inverter side annular connecting portions (12) to be connected to the inverter side terminals (61) and coil springs (13) spirally wound and electrically conductively connecting the motor side annular connecting portions (11) and the inverter side annular connecting portions (12).

Abstract: A connector has first and second housings (10A, 30A) that can be fit together along a fit-on direction. A female terminal (14) is mounted in a cavity (12) of a first housing (10A). A lance (19) is formed inside the first housing (10A) and locks the female terminal (14) in the cavity (12). The lance (19) can deform elastically in the flexibility allowance space (22) to unlock the female terminal (14). A retainer projection (34) is provided in a second housing (30A) and projects along a fit-in direction of the first and second housings (10A, 30A). The retainer projection (34) penetrates into the flexibility allowance space (22) as the first and second housings (10A, 30A) are fit together to prevent the lance (19) from flexing in an unlocking direction.

Abstract: A shielding connector has shielding electric wires (10) and a terminal fitting (20) mounted on an end of each of the shielding electric wires (10). The connector also has a housing (30) made of synthetic resin and configured to fit in a mounting hole (62) in a case (60). Terminal insertion chambers (32) are provided inside the housing (30) and receive the terminal fittings (20). A rubber stopper (37) is fitted on an entrance (36) of each of the terminal insertion chambers (32). A metal shielding shell (50) is mounted to cover a rear surface of the housing (30) and has a mounting plate (57) to be fixed to the case (60). Connection tubes (53) project on a rear surface of the shielding shell (50) and communicate with the terminal insertion chambers (32). Braided wires (13) of the shielding electric wires (10) can be connected the connection tubes (53).

Abstract: A shielding connector apparatus includes an equipment-side shielding connector (50) with an equipment-side shielding housing (51) and an electric wire-side shielding connector (20) with an electric wire-side shielding housing (21). A connector fit-on nut (65) is formed on the equipment-side shielding housing (51). The electric wire-side shielding housing (21) has a fit-on bolt (39) that is screwed into the connector fit-on nut (65) to fit both shielding connectors together. An equipment-side contact surface (64) is formed on the equipment-side shielding housing (51). An electric wire-side contact surface (38) is formed on the electric wire-side shielding housing (21).

Abstract: A male connector (10) has a male terminal fitting (20) mounted in a male housing (10A). The male housing (10A) has tube (11) surrounding the male terminal fitting (20). The tube (11) is spaced out from a conductive part (23) of the male terminal fitting (20) by a distance so that a finger cannot be inserted between the tube (11) and the male terminal fitting (20). A fit-on part (31) of a female connector (30) can be inserted between the tube (11) and the male terminal fitting (20) so that a female terminal fitting (34) can contact the conductive part (23) of the male terminal fitting (20). An insulating coating (26) is formed on a front end of the male terminal fitting (20) by molding a resin to prevent shocks.

Abstract: A connector has first and second housings (10A, 30A) that can be fit together along a fit-on direction. A female terminal (14) is mounted in a cavity (12) of a first housing (10A). A lance (19) is formed inside the first housing (10A) and locks the female terminal (14) in the cavity (12). The lance (19) can deform elastically in the flexibility allowance space (22) to unlock the female terminal (14). A retainer projection (34) is provided in a second housing (30A) and projects along a fit-in direction of the first and second housings (10A, 30A). The retainer projection (34) penetrates into the flexibility allowance space (22) as the first and second housings (10A, 30A) are fit together to prevent the lance (19) from flexing in an unlocking direction.