Abstract:
PROBLEM TO BE SOLVED: To provide a miniaturizable ball screw capable of easily arranging a circulating part for circulating balls at a low load position. SOLUTION: This ball screw 20 has connection grooves 27 for ball circulation formed on a ball screw shaft 21 and shielding members 28. The connecting grooves 27 connect screw grooves 24 of the ball screw shaft 21 and circulate balls 23. The shielding members 28 are guiding members for returning balls 23 to the initial screw grooves 24 and end surfaces 28a thereof are guiding surfaces. The ball screw shaft 21 is unrotatable and is movable in an axial direction. Piece members having connecting grooves can be installed on the ball screw shaft 21 instead of the connecting grooves 27 and the shielding members 28. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a box pallet for carrying a heavy object which is easy to pack and unpack and produces no industrial waste, and a method for carrying a heavy object using the box pallet. SOLUTION: The box pallet has legs 2 at four corners on a lower part of a base 1, and a box-formed storage portion 3 comprising a base 3a, a rear face 3b, both side faces 3c and 3d and a front face 3e mounted on an upper part of the base 1, wherein the front face 3e is made removable and a belt 10 is attached over the rear face 3b and the front face 3d. With this box pallet, a heavy object is received by horizontal movement from the front of a front opening formed by removing the front face 3e or is made to be capable of being taken out toward the front. In carrying, a cushion is put in the box-formed storage portion, partitioning members are put between heavy objects, an upper cushion is put over them, and the pallet is fastened with the belt 10 for carrying. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a swing arm unit which enables stabilized support of imbalanced load of an oscillating swing arm and which can be made thin. SOLUTION: A swing arm 10 equipped with a magnetic head at one end is installed on a rotary supporting shaft 12 via a bearing 1 so as to freely rotate both in normal direction and reverse direction. The bearing 1 is constituted of a single-row radial rolling bearing 6 and a thrust sliding bearing 5. The width surface of an inner ring 2 or an outer ring 3 in the radial rolling bearing 6 is constituted of a sliding bearing surface in the thrust sliding bearing 5. The thrust sliding bearing 5 is constituted of a pair of thrust plates 15. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a heat-resistant, high speed, and high-loaded rolling bearing, which is used for accessory units or electrically-powered components, having non abnormal flaking phenomena, sufficiently long life, and superior durability under high temperature, high speed, and high loading operating conditions. SOLUTION: Grease composition, in which diurea compound showed in the following chemical expression 5 is combined as a thickener and a passive agent such as sodium nitrite is also added at 0.1 to 5 wt.% in base oil mixed alkyl diphenyl ether oil and aromatic ether oil with 20 to 150 mm 2 /s of dynamic viscosity at 40°C in a range from 50:50 to 80:20 (weight ratio) and is filled in the heat-resistant, high speed, and high-loaded rolling bearing. (where, R 2 shows an aromatic hydrocarbon group having 6 to 15C, R 1 and R 3 show an aromatic hydrocarbon group having 6 to 12C, or an cycloalkane family hydrocarbon group having 6 to 20C, a rate of aromatic hydrocarbon of R 1 and R 3 occupied in a full amount are 1/2 or more in a mole ratio, and R 1 and R 3 may be the same or different. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an abrasion resistant fluororesin composition having excellent non-sticking and abrasion resistance, useful as a coating film not deteriorating surface roughness thereof, a coating film using the resin composition, and a seamless pipe for a fixing device having the coating film as a surface releasing layer. SOLUTION: This fluororesin composition is obtained by blending a fluororesin, specifically a fluororesin having melting point of 320°C or lower, further specifically a tetrafluoroethylene-perfluoroalkylvinylether copolymer resin with powder of a heat resistant resin having 10 μm or smaller average particle size, especially powder of an aromatic polyimide-based resin, an aromatic polyimide-based resin obtained from an aromatic polyimide-based precursor or an aromatic polyamide resin. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a door opener, by which a door open-close unit is miniaturized and lightened and a door can be opened efficiently by only one of the operation of a touch switch and which is silent. SOLUTION: In the door opener 1 opening the rotary type door 10 in which one end section is supported rotatably by a hinge, the door opener 1 has a motor 2, a screw shaft 4, which is housed in a bottomed cylindrical housing 3 and to which the rotation of the motor 2 is transmitted, a nut 5 screwed to the screw shaft 4 and internally inserted into the housing 3 and a spring 6 housed between the bottom section 3a of the housing 3 and the motor 2. A spiral thread groove 4a is formed to the outer circumference of the screw shaft 4, and slid and contacted with the thread groove 5a formed to the inner circumference of the nut 5 and the rotation of the motor 2 is converted into the linear motion of the nut 5. Since the nut 5 is formed retractively and irrotationally to the housing 3 and the screw shaft 4 is formed integrally with an output shaft of the motor 2 and the motor 2 is abutted against a shoulder section 3c formed to the housing 3, the screw shaft 4 is constituted rotatably but unretractively.
Abstract:
PROBLEM TO BE SOLVED: To provide a production line capable of easily changing process and a method for changing the process. SOLUTION: A production line 71 comprises a plurality of production facilities 72 and physical distribution facilities. As the plurality of production facilities 72 constituting the production line, there are used unit construction special purpose machines prepared by exchangeably combining a modular unit 76 and a main body machine 75 of common specification. These unit construction special purpose machines are capable of changing their functions by exchange of the modular unit 76, and process of the production line can be changed by this function change.
Abstract:
PROBLEM TO BE SOLVED: To prevent the operation fault by wiring of a lens holder 6 of an optical pickup device constituted by turnably supporting the lens holder 6 at a supporting shaft 2 disposed at an optical head body 1. SOLUTION: The supporting shaft 2 is formed as a hollow shaft and a jumper wire 12 is passed and wired into the through-hole of this hollow shaft, by which the operation fault by the wiring of the lens holder 6 is prevented. COPYRIGHT: (C)2003,JPO