Abstract: The present invention relates to light-scattering silica particles having a light scattering property, the light-scattering silica particles including: a plurality of hollow portions each having a closed pore structure inside the particle, in which the light-scattering silica particles have a volume-based cumulative 50% particle diameter of 1 ?m to 500 ?m and an average circularity of 0.80 or more, and in use of the light-scattering silica particles, a reflectance A of a water cake containing 20 mg/cm2 of silica per measurement cross-sectional area at an ultraviolet wavelength of 310 nm is 30% or more.

Abstract: A robot system and method for controlling a robot, wherein during learning, a detection unit detects, as waveform data for learning, the contact state when a socket is caused to contact a set position of the head of a bolt and is caused to rotate around the set position within a set movement range. A learning unit learns a plurality of detected sets of the waveform data for learning and writes the learning results to a determination unit. During practical operations, the determination unit recognizes the amount that the socket slips with respect to the bolt on the basis of actual waveform data indicating the change in the contact state when the socket is in contact with the head of the bolt and the written learning results.

Abstract: A cartridge includes a photosensitive drum having a rotational axis about which the photosensitive drum is rotatable, a developing roller having a rotational axis about which the developing roller is rotatable, and a casing rotatably supporting the photosensitive drum and the developing roller. The casing includes a groove open to outside of the casing, with the groove being defined by a first side surface, a second side surface, and a bottom surface between the first side surface and the second side surface. As seen in the direction of the rotational axis of the photosensitive drum, the rotational axis of the photosensitive drum and the groove are positioned along a line in an extended direction, with at least a portion of a first projected part being positioned on one side of the line and at least a portion of a second projected part being positioned on the other side of the line.

Abstract: A cartridge includes a photosensitive drum, a developing roller, and a casing rotatably supporting the photosensitive drum and the developing roller. The casing includes a groove open to outside of the casing. The casing also includes first and second projected parts that project from the first end portion of the casing in the direction of a rotational axis of the photosensitive drum and away from the photosensitive drum. As seen in the direction of the rotational axis of the photosensitive drum, the rotational axis of the photosensitive drum and the groove are positioned along a line in the extended direction, with the first projected part being positioned on one side of the line and the second projected part being positioned on the other side of the line. A first end of the groove and a second end of the groove are open such that the groove forms a channel in the casing along the extended direction.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: Provided is a tightening device capable of capturing a change in a contact state of a member to be tightened, such as a bolt or the like, and also performing fastening. The tightening device tightens a bolt to a work piece in a state where a main body is engaged with the bolt, and includes: a magnet that holds the bolt with respect to the main body; and at least one lower cam member that enables fixation in a fixed state where a binding force on the bolt is larger than a holding force of holding the bolt by the magnet. The at least one lower cam member is capable of maintaining the fixed state before a tightening work of tightening the bolt to the work piece is performed and releasing the fixed state after the tightening work is started.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: Provided is a tightening device capable of easily capturing a change in a contact state of a member to be tightened such as a bolt or the like and also reliably performing fastening. A tightening device (10) tightens a bolt (A) to a work piece (B) in a state where a main body (11) is engaged with the bolt (A), and includes: a magnet (11b) that holds the bolt (A) with respect to the main body (11); and lower cam members (15) that enable fixation in a fixed state where a binding force on the bolt (A) is larger than that in the held state by the magnet (11b). The lower cam member (15) is capable of maintaining the fixed state before the tightening work of tightening the bolt (A) to the work piece (B) is performed and releasing the fixed state after the tightening work is started.

Abstract: A robot system and method for controlling a robot, wherein during learning, a detection unit detects, as waveform data for learning, the contact state when a socket is caused to contact a set position of the head of a bolt and is caused to rotate around the set position within a set movement range. A learning unit learns a plurality of detected sets of the waveform data for learning and writes the learning results to a determination unit. During practical operations, the determination unit recognizes the amount that the socket slips with respect to the bolt on the basis of actual waveform data indicating the change in the contact state when the socket is in contact with the head of the bolt and the written learning results.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: The present invention provides an electrode tip with which cooling efficiency can be improved, and with which a pressurization withstanding performance enabling the electrode tip to withstand pressurization during welding can be improved. An electrode tip is provided with: an electrode tip main body portion; and a support post portion which is disposed inside the electrode tip main body portion, and abuts a reverse surface side of a distal end portion of the electrode tip main body portion at least during welding pressurization, to thereby suppress displacement of the distal end portion of the electrode tip main body portion. The support post portion is formed using a material having higher values of tensile strength and Young's modulus than those of the electrode tip main body portion.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.

Abstract: A cartridge mountable to a printer, said printer including a coupling guide contactable to a coupling of the cartridge to guide the coupling member. A case of the cartridge is provided with a hole for exposing a free end portion of the coupling to an outside of the cartridge, and a retracted portion provided in downstream of the hole with respect to the mounting direction of the cartridge. When the cartridge is mounted to a main assembly of the printer, the coupling guide enters the retracted portion from which the coupling member has retracted.