Abstract: Provided is an output checking device for a wire rope flaw detector, with which the presence or absence of abnormality in an output of a wire rope flaw detector can be more reliably checked. The output checking device for a wire rope flaw detector includes: a pipe; and a test body to be allowed to move inside the pipe. The pipe is placed in a wire rope placement portion of a wire rope flaw detector, through which a wire rope moves when the wire rope flaw detector detects damage of the wire rope. The test body includes: a test piece guide made of a non-magnetic material; and a test piece made of a magnetic material, which is provided to the test piece guide.

Abstract: A wire rope flaw detection device includes: a base unit including a magnetizer for forming a main magnetic path in the axial direction of a wire rope, and a magnetic sensor for detecting a leakage magnetic flux generated by a wire rope damaged part; and a guide unit including guide members and a guide plate which are formed in U shapes along the outer circumference of the wire rope, wherein the guide unit is fixed to the base unit.

Abstract: Provided is a wire rope flaw detector including a magnetizer configured to form a main magnetic flux in a part of a wire rope in a longitudinal direction thereof. A plurality of search coils are configured to detect a leakage flux that occurs from a damaged part of the wire rope in a segment in which the main magnetic flux is formed. A control unit is configured to detect induced voltages generated in the plurality of search coils. Further, the control unit is configured to superimpose voltage waveforms of the plurality of search coils on one another while shifting the voltage waveforms by a time calculated based on an interval between the plurality of search coils adjacent to each other and on a relative moving speed of the wire rope with respect to the magnetizer, to thereby amplify a peak of the induced voltage.

Abstract: Provided is a wire rope flaw detector including a magnetizer configured to form a main magnetic flux in a part of a wire rope in a longitudinal direction thereof. A plurality of search coils are configured to detect a leakage flux that occurs from a damaged part of the wire rope in a segment in which the main magnetic flux is formed. A control unit is configured to detect induced voltages generated in the plurality of search coils. Further, the control unit is configured to superimpose voltage waveforms of the plurality of search coils on one another while shifting the voltage waveforms by a time calculated based on an interval between the plurality of search coils adjacent to each other and on a relative moving speed of the wire rope with respect to the magnetizer, to thereby amplify a peak of the induced voltage.

Abstract: A wire rope flaw detection device includes: a base unit including a magnetizer for forming a main magnetic path in the axial direction of a wire rope, and a magnetic sensor for detecting a leakage magnetic flux generated by a wire rope damaged part; and a guide unit including guide members and a guide plate which are formed in U shapes along the outer circumference of the wire rope, wherein the guide unit is fixed to the base unit.

Abstract: In a braking apparatus, a buffering member that is formed using a flexible material is disposed between a fixed portion and a movable portion. An accommodating recess portion that accommodates and holds the buffering member is disposed on a buffering member holding portion that includes at least one of the fixed portion and the movable portion. An opening portion that communicates with an external portion of the buffering member holding portion is disposed on a portion of a side surface of the accommodating recess portion. The buffering member is removable from and insertable into the accommodating recess portion through the opening portion from a direction that is perpendicular to a direction of displacement of the movable portion.

Abstract: A brake device for an elevator hoisting machine includes: a rod movable in an axial direction; a plurality of pistons provided to the rod so as to be arranged side by side in the axial direction; a cylinder configured to accommodate each of the pistons therein and including a pressure control chamber formed between the cylinder and each of the pistons; a lining provided to the rod so as to be capable of coming into contact with a contacted body; and a spring device configured to press the pistons in a direction in which the lining is pressed against the contacted body. Gaps are respectively formed between at least one of the plurality of pistons and the rod and between pistons adjacent to each other. Each of the pistons is configured to be driven by a change in air pressure in the pressure control chamber.

Abstract: In a braking apparatus, a buffering member that is formed using a flexible material is disposed between a fixed portion and a movable portion. An accommodating recess portion that accommodates and holds the buffering member is disposed on a buffering member holding portion that includes at least one of the fixed portion and the movable portion. An opening portion that communicates with an external portion of the buffering member holding portion is disposed on a portion of a side surface of the accommodating recess portion. The buffering member is removable from and insertable into the accommodating recess portion through the opening portion from a direction that is perpendicular to a direction of displacement of the movable portion.