Abstract: A required inventory calculating system includes a first section for calculating product importance level coefficients, a second section for calculating procurement risk level coefficients, a third section for calculating general coefficients by multiplying the product importance level coefficients by the procurement risk level coefficients, a fourth section for calculating required inventory periods respectively with respect to raw materials or partly finished products by multiplying the general coefficients by a predetermined longest inventory period, and, if the required inventory periods are shorter than a predetermined shortest inventory period, setting the required inventory periods as the shortest inventory period, and a fifth section for calculating required inventories respectively for the raw materials or the partly finished products by multiplying required quantities of the raw materials or the partly finished products required to supply the products to customers or wholesalers in a predetermined p

Abstract: Provided is a double-row self-aligning roller bearing including: an inner ring; an outer ring having a spherical raceway surface; and rollers arranged in two rows and interposed between the inner ring and the outer ring, wherein a ratio of a contact angle ?1 in one row to a contact angle ?2 in the other row falls within a range of 0.25??1/?2?0.5, and a ratio of distance B1 in a bearing width direction from an end face of the bearing on a side of the one of the rows to an intersection of two lines of action defining the contact angles of the two rows, relative to a distance B2 in the bearing width direction from an end face of the bearing on a side of the other of the rows to the intersection falls within a range of 0.5?B1/B2?0.6.

Abstract: The double-row self-aligning roller bearing includes an outer ring having a spherical raceway surface, and each of rollers in two rows has an outer peripheral surface whose cross-sectional shape corresponds to the raceway surface of the outer ring. The rollers in the two rows have different lengths from each other, and the length of the longer rollers is equal to or greater than 36% of a bearing width. A ratio of a contact angle of the shorter rollers relative to a contact angle of the longer rollers is within a range of 1:4 to 1:2. The contact angle of the shorter rollers has a range of 3° to 5°, and the contact angle of the longer rollers has a range of 11° to 14°.

Abstract: Provided is a double-row self-aligning roller bearing including: an inner ring; an outer ring having a spherical raceway surface; and rollers arranged in two rows and interposed between the inner ring and the outer ring, wherein a ratio of a contact angle ?1 in one row to a contact angle ?2 in the other row falls within a range of 0.25??1/?2?0.5, and a ratio of distance B1 in a bearing width direction from an end face of the bearing on a side of the one of the rows to an intersection of two lines of action defining the contact angles of the two rows, relative to a distance B2 in the bearing width direction from an end face of the bearing on a side of the other of the rows to the intersection falls within a range of 0.5?B1/B2?0.6.

Abstract: A double-row self-aligning roller bearing has rollers interposed, in two rows aligned in a bearing width direction, between an inner ring and an outer ring. The outer ring has a spherical raceway surface. Each of the rollers has an outer circumferential surface having a cross-sectional shape that matches the raceway surface of the outer ring. Either or both of shapes and contact angles of the rollers are different from each other. An attachment hole to which a protrusion prevention jig is attachable is provided in an end surface of at least either one of the inner ring and the outer ring. The protrusion prevention jig prevents protrusion of the end surface of the inner ring in the bearing width direction with respect to the end surface of the outer ring.

Abstract: An inspection system according to one embodiment includes: a first signal output unit that outputs to an illumination unit a first signal serving as a trigger to start outputting stripe patterns; a second signal output unit that outputs to the illumination unit a second signal serving as a trigger to switch the stripe patterns; an image-data acquisition unit that acquires time-correlation image data by starting superimposition of frames output from an image sensor at a timing based on the first signal; an image generation unit that generates a first time-correlation image and a second time-correlation image based on the time-correlation image data, the first time-correlation image corresponding to a first stripe pattern alone, the second time-correlation image corresponding to a second stripe pattern alone; and an abnormality detection unit that detects, based on the first time-correlation image and the second time-correlation image, an abnormality on the inspection target surface.

Abstract: A double-row self-aligning roller bearing has rollers interposed, in two rows aligned in a bearing width direction, between an inner ring and an outer ring. The outer ring has a spherical raceway surface. Each of the rollers has an outer circumferential surface having a cross-sectional shape that matches the raceway surface of the outer ring. The rollers have lengths equal to each other and maximum diameters equal to each other, and have different distances from centers of the roller lengths to positions at which the maximum diameters are obtained.

Abstract: The double-row self-aligning roller bearing includes an outer ring having a spherical raceway surface, and each of rollers in two rows has an outer peripheral surface whose cross-sectional shape corresponds to the raceway surface of the outer ring. The rollers in the two rows have different lengths from each other, and the length of the longer rollers is equal to or greater than 36% of a bearing width. A ratio of a contact angle of the shorter rollers relative to a contact angle of the longer rollers is within a range of 1:4 to 1:2. The contact angle of the shorter rollers has a range of 3° to 5°, and the contact angle of the longer rollers has a range of 11° to 14°.

Abstract: A double-row self-aligning roller bearing, which is suitable for receiving an axial load and a radial load, and loads having different magnitudes acting on rollers in two rows, and achieves sufficient load capacity for the rollers that receive axial load within the constraint of dimensional standards, is provided. The double-row self-aligning roller bearing includes inner and outer rings; and rollers in two rows arranged in a bearing width direction interposed between the inner and outer rings and having lengths different from each other. The roller has an outer peripheral surface of a cross-sectional shape along a raceway surface of the outer ring having a spherical shape. Length of the longer rollers is equal to or greater than 39% of the bearing width. A ratio of contact angle of the shorter rollers and contact angle of the longer rollers is within a range of 1:4 to 1:2.

Abstract: An inspection system according to one embodiment includes: a first signal output unit that outputs to an illumination unit a first signal serving as a trigger to start outputting stripe patterns; a second signal output unit that outputs to the illumination unit a second signal serving as a trigger to switch the stripe patterns; an image-data acquisition unit that acquires time-correlation image data by starting superimposition of frames output from an image sensor at a timing based on the first signal; an image generation unit that generates a first time-correlation image and a second time-correlation image based on the time-correlation image data, the first time-correlation image corresponding to a first stripe pattern alone, the second time-correlation image corresponding to a second stripe pattern alone; and an abnormality detection unit that detects, based on the first time-correlation image and the second time-correlation image, an abnormality on the inspection target surface.

Abstract: A double-row self-aligning roller bearing has rollers interposed, in two rows aligned in a bearing width direction, between an inner ring and an outer ring. The outer ring has a spherical raceway surface. Each of the rollers has an outer circumferential surface having a cross-sectional shape that matches the raceway surface of the outer ring. Either or both of shapes and contact angles of the rollers are different from each other. An attachment hole to which a protrusion prevention jig is attachable is provided in an end surface of at least either one of the inner ring and the outer ring. The protrusion prevention jig prevents protrusion of the end surface of the inner ring in the bearing width direction with respect to the end surface of the outer ring.

Abstract: A double-row self-aligning roller bearing has rollers interposed, in two rows aligned in a bearing width direction, between an inner ring and an outer ring. The outer ring has a spherical raceway surface. Each of the rollers has an outer circumferential surface having a cross-sectional shape that matches the raceway surface of the outer ring. The rollers have lengths equal to each other and maximum diameters equal to each other, and have different distances from centers of the roller lengths to positions at which the maximum diameters are obtained.

Abstract: A double-row self-aligning roller bearing, which is suitable for receiving an axial load and a radial load, and loads having different magnitudes acting on rollers in two rows, and achieves sufficient load capacity for the rollers that receive axial load within the constraint of dimensional standards, is provided. The double-row self-aligning roller bearing includes inner and outer rings; and rollers in two rows arranged in a bearing width direction interposed between the inner and outer rings and having lengths different from each other. The roller has an outer peripheral surface of a cross-sectional shape along a raceway surface of the outer ring having a spherical shape. Length of the longer rollers is equal to or greater than 39% of the bearing width. A ratio of contact angle of the shorter rollers and contact angle of the longer rollers is within a range of 1:4 to 1:2.

Abstract: A double-row self-aligning roller bearing includes an inner ring, an outer ring having a spherical raceway surface, and rollers in a left row and rollers in a right row interposed between the inner ring and the outer ring, the rollers in the left row and the rollers in the right row each having an outer peripheral surface having a cross-sectional shape along the raceway surface of the outer ring. The length of each roller in the left row and the length of each roller in the right row are different from each other, and the number of the rollers in the left row and the number of the rollers in the right row are different from each other.

Abstract: In a method for adjusting parameters of impedance control, an overshoot amount allowable value is set as an allowable maximum value of an overshoot amount of a time response of a force feedback from a force sensor provided for an end effector of a robot manipulator, and a setting time allowable value is set as an allowable maximum value of a setting time of the time response of the force feedback. A viscosity parameter with which the setting time is shortest is calculated while fixing the inertia parameter. An overshoot amount adjustment value and a setting time adjustment value which are obtained from a result of the calculating of the viscosity parameter are compared with the overshoot amount allowable value and the setting time allowable value, respectively, to determine whether a repeating process is finished or continued.

Abstract: A robot system includes: a robot including a camera unit shooting an object in a container, a hand gripping the object, and a contact detector detecting that the hand contacts the container; and a robot control device, which includes a control unit causing the hand to contact the container; a contact detection unit detecting by the contact detector that the hand contacts the container, and finding a contact position thereof; a first processing unit calculating a position of the container from a stereo image of the container acquired by the camera unit; a second processing unit calculating a difference between the position of the container calculated by the first processing unit and the contact position found by the contact detection unit as a correction amount; and a third processing unit correcting information on a position in a height direction of the object in the container based on the correction amount.

Abstract: An optical wavelength multi/demultiplexing circuit is provided in which temperature dependence at a transmission center wavelength remained in an athermalized AWG is compensated. An AWG according to an embodiment of the present invention is compensated for the main temperature dependence at the transmission center wavelength. The AWG comprises an optical splitter, a first and second arm waveguides, an optical mode combining coupler and a multimode waveguide between an input/output waveguide and a slab waveguide. The optical mode combining coupler couples fundamental mode light from the first arm waveguide as fundamental mode and the fundamental mode light from the second arm waveguide as first mode. The multimode waveguide is capable of propagating the fundamental and first mode light. This AWG is configured such that the temperature dependence remained in the arrayed waveguide grating is compensated by changing the optical path length difference between the first and second arm waveguides with temperature.

Abstract: An apparatus for detecting a contact position where a robot makes contact with an object includes a probe, a probe-position calculating unit, a contact detecting unit, and a contact-position calculating unit. The probe is attached to the robot and is configured to make a displacement in a direction of making contact with the object in an elastic manner. The probe-position calculating unit calculates a position of the probe of the robot in operation. The contact detecting unit detects a contact state of the probe with the object. When the contact state of the probe is detected, the contact-position calculating unit derives the contact position based on a calculated position of the probe.

Abstract: A force sensor and a robot that can suppress a load applied to load sensor elements are provided. A force sensor includes: a first base member one surface of which is fixed on a fixed member; a plurality of load sensor elements that is provided on another surface of the first base member to detect a load; a second base member that is disposed facing the other surface of the first base member to generate a preload to be applied to each of the load sensor elements toward the first base member; a preload adjusting unit that adjusts the magnitude of the preload generated by the second base member; and buffer bodies that receive a part of an external load to be applied to each of the load sensor elements from the outside.

Abstract: A robot system includes: a robot including a camera unit shooting an object in a container, a hand gripping the object, and a contact detector detecting that the hand contacts the container; and a robot control device, which includes a control unit causing the hand to contact the container; a contact detection unit detecting by the contact detector that the hand contacts the container, and finding a contact position thereof; a first processing unit calculating a position of the container from a stereo image of the container acquired by the camera unit; a second processing unit calculating a difference between the position of the container calculated by the first processing unit and the contact position found by the contact detection unit as a correction amount; and a third processing unit correcting information on a position in a height direction of the object in the container based on the correction amount.