Abstract: Provided is a short-circuit isolator capable of earlier detection of recovery from short circuit of a disconnected line and reconnecting the line.

Abstract: A pipe expanding device inserts a pipe expanding punch into an opening end portion of a steel pipe with a special shape in the state where the opening end portion of the steel pipe with a special shape is pressed in an insertion direction of the punch.

Abstract: A cab includes left and right rear pole members having internal spaces and prescribed shapes in cross-section. The right rear pole member includes a first hole portion that extends along the longitudinal direction of the right rear pole member and penetrates the right rear pole member in the left-and-right direction of the right rear pole member, and a first plate-shaped member inserted into and secured in the first hole portion.

Abstract: A cab for a construction machine includes a pillar member and a beam member. The pillar member is disposed generally along a vertical direction, and includes a cutout portion and a protruding portion. The cutout portion is formed on an upper end thereof. The protruding portion is formed on the upper end on an inner side of the cutout portion with respect to a widthwise direction of the cab. The beam member is disposed generally along a direction perpendicular to the vertical direction. The beam member is joined to the pillar member with the beam member partially overlapping the cutout portion on the upper end of the pillar member in a plan view, and a lateral surface of the beam member abutting against the protruding portion.

Abstract: Provided is an audible alarm device including a piezoelectric buzzer, which is capable of suppressing wasted current consumption not contributing to increased sound pressure of the piezoelectric buzzer. The audible alarm device includes: a piezoelectric buzzer; a coil connected in parallel to the piezoelectric buzzer; a current limiting means for adjusting a current supply period for the piezoelectric buzzer and the coil, and limiting a current to the coil during current supply; and a control circuit for controlling on/off time of the current limiting means.

Abstract: Provided is a short-circuit isolator capable of earlier detection of recovery from short circuit of a disconnected line and reconnecting the line.

Abstract: A reinforcement structure for a pipe includes a hole section and a plate member. The hole section is formed on an outer peripheral surface of the pipe along a longitudinal direction of the pipe to pass through a peripheral wall of the pipe to reach an interior portion of the pipe. The plate member is inserted in the hole section and secured to the pipe.

Abstract: A cab for a construction machine includes a pillar member and a beam member. The pillar member is disposed generally along a vertical direction, and includes a cutout portion and a protruding portion. The cutout portion is formed on an upper end thereof. The protruding portion is formed on the upper end on an inner side of the cutout portion with respect to a widthwise direction of the cab. The beam member is disposed generally along a direction perpendicular to the vertical direction. The beam member is joined to the pillar member with the beam member partially overlapping the cutout portion on the upper end of the pillar member in a plan view, and a lateral surface of the beam member abutting against the protruding portion.

Abstract: A cab includes left and right rear pole members having internal spaces and prescribed shapes in cross-section. The right rear pole member includes a first hole portion that extends along the longitudinal direction of the right rear pole member and penetrates the right rear pole member in the left-and-right direction of the right rear pole member, and a first plate-shaped member inserted into and secured in the first hole portion.

Abstract: A reinforcement structure for a pipe includes a hole section and a plate member. The hole section is formed on an outer peripheral surface of the pipe along a longitudinal direction of the pipe to pass through a peripheral wall of the pipe to reach an interior portion of the pipe. The plate member is inserted in the hole section and secured to the pipe.

Abstract: A pipe expanding device inserts a pipe expanding punch into an opening end portion of a steel pipe with a special shape in the state where the opening end portion of the steel pipe with a special shape is pressed in an insertion direction of the punch.

Abstract: Imaging forming apparatus includes an image bearing member, an image formation unit for forming an image on the image bearing member, and a detection unit for detecting a voltage-current characteristic between the image bearing member and the charging member. The image formation unit has a charging member contactable to the image bearing member to charge the image bearing member. An image formation condition for the image bearing member is determined on the basis of a plurality of detection operations of the detection unit.

Abstract: An electrophotographic apparatus includes an electrophotographic photosensitive member; a charging member contactable to the photosensitive member for charging the photosensitive member at a charging position; exposure means for exposing the photosensitive member to electrically discharging the photosensitive member, wherein when a region of the photosensitive member discharged by the exposure means is at the charging position, a voltage-current characteristic between the charging member and the photosensitive member is detected; changing means for changing an incident light quantity to the photosensitive member from the exposure means.