Abstract: Provided is an inter-shaft distance measuring device for measuring a distance between two shafts or an amount of a change in the distance that includes: measuring elements that are respectively in contact with peripheral surfaces of the two shafts at a time of measurement and that are used as measurement references; a moving mechanism that includes an elastic member and that holds the measuring elements to move the measuring elements relatively and adds a force in opposite directions separating the measuring elements by an elastic force of the elastic member; and a measurer that measures the change in the distance between the measuring elements. In a state at the time of the measurement, the measuring elements between the two shafts add a pressing force by the moving mechanism respectively to the two shafts in directions widening the distance, and the state at the time of the measurement is maintainable.

Abstract: A survey machine capturing control part captures a captured image including a 2D mark on a survey object using a telescope. A survey machine recognizing control part detects a 2D mark image as a captured pattern, and recognizes a specific identification pattern by collating the detected captured pattern with an identification pattern of a 2D mark. A survey machine information displaying control part acquires and displays survey information on the captured image. A calculating control part calculates differences between a mark center position of 2D coordinates and a center position of 2D coordinates of a crosshair of the telescope. An adjusting control part adjusts a direction of the telescope so that the center position of the crosshair matches the mark center position. A ranging control part ranges the mark center position as measured values of coordinates. An information storing control part stores the measured values in the mark information table.

Abstract: A survey machine capturing control part captures a captured image including a 2D mark on a survey object using a telescope. A survey machine recognizing control part detects a 2D mark image as a captured pattern, and recognizes a specific identification pattern by collating the detected captured pattern with an identification pattern of a 2D mark. A survey machine information displaying control part acquires and displays survey information on the captured image. A calculating control part calculates differences between a mark center position of 2D coordinates and a center position of 2D coordinates of a crosshair of the telescope. An adjusting control part adjusts a direction of the telescope so that the center position of the crosshair matches the mark center position. A ranging control part ranges the mark center position as measured values of coordinates. An information storing control part stores the measured values in the mark information table.

Abstract: Provided is an inter-shaft distance measuring device for measuring a distance between two shafts or an amount of a change in the distance that includes: measuring elements that are respectively in contact with peripheral surfaces of the two shafts at a time of measurement and that are used as measurement references; a moving mechanism that includes an elastic member and that holds the measuring elements to move the measuring elements relatively and adds a force in opposite directions separating the measuring elements by an elastic force of the elastic member; and a measurer that measures the change in the distance between the measuring elements. In a state at the time of the measurement, the measuring elements between the two shafts add a pressing force by the moving mechanism respectively to the two shafts in directions widening the distance, and the state at the time of the measurement is maintainable.

Abstract: A fixing apparatus comprises: a fixing member and a pressing member; and a pressing mechanism that forms a fixing nip part by pressing the pressing member against the fixing member. The pressing mechanism has: a pressure cam to press the pressing member against the fixing member; a camshaft that the pressure cam is attached to, and that is rotated integrally with the pressure cam; a stepping motor; and a power transmission part that transmits a driving force of the stepping motor to the camshaft. The power transmission part includes a worm provided on a power transmission path from the stepping motor to the camshaft.

Abstract: A fixing apparatus comprises: a fixing member and a pressing member; and a pressing mechanism that forms a fixing nip part by pressing the pressing member against the fixing member. The pressing mechanism has: a pressure cam to press the pressing member against the fixing member; a camshaft that the pressure cam is attached to, and that is rotated integrally with the pressure cam; a stepping motor; and a power transmission part that transmits a driving force of the stepping motor to the camshaft. The power transmission part includes a worm provided on a power transmission path from the stepping motor to the camshaft.

Abstract: An image forming apparatus includes: a first suction path for sucking and recovering dust from a place where the dust is generated; and a second suction path for sucking and recovering a predetermined gas from a place where the gas is generated, wherein the first suction path includes a first filter that collects the dust, a first suction fan provided downstream of the first filter, and an exhaust path of the first suction path, the second suction path includes a second filter that collects the gas, a second suction fan provided downstream of the second filter, and an exhaust path of the second suction path, and a connection in which the exhaust path of the first suction path is connected upstream of the second filter in the second suction path is included.

Abstract: An image forming apparatus includes: a first suction path for sucking and recovering dust from a place where the dust is generated; and a second suction path for sucking and recovering a predetermined gas from a place where the gas is generated, wherein the first suction path includes a first filter that collects the dust, a first suction fan provided downstream of the first filter, and an exhaust path of the first suction path, the second suction path includes a second filter that collects the gas, a second suction fan provided downstream of the second filter, and an exhaust path of the second suction path, and a connection in which the exhaust path of the first suction path is connected upstream of the second filter in the second suction path is included.

Abstract: The print performance of an image forming apparatus is improved by adequately estimating the behavior of a sheet receiving separation air and controlling the output of separation air. A fixing control unit 50 controls a shutter drive unit 52 defining the flow passage area on the basis of the displacement detected of the separation claw 42 to control the output of separation air. Since the sheet receiving separation air exerts a force on the separation claw 42, it is possible to estimate whether or not the behavior of the sheet is appropriate by monitoring the displacement of the separation claw 42. While different types of paper may move in different ways, the influence of separation air is dominant in the behavior of a sheet which is conveyed, and therefore the sheet can be prevented from moving in an inappropriate condition by controlling the output of separation air.

Abstract: The print performance of an image forming apparatus is improved by adequately estimating the behavior of a sheet receiving separation air and controlling the output of separation air. A fixing control unit 50 controls a shutter drive unit 52 defining the flow passage area on the basis of the displacement detected of the separation claw 42 to control the output of separation air. Since the sheet receiving separation air exerts a force on the separation claw 42, it is possible to estimate whether or not the behavior of the sheet is appropriate by monitoring the displacement of the separation claw 42. While different types of paper may move in different ways, the influence of separation air is dominant in the behavior of a sheet which is conveyed, and therefore the sheet can be prevented from moving in an inappropriate condition by controlling the output of separation air.