Abstract: This shock absorber includes a friction generating member which is provided at a position on a side defined by a seal member of a cylinder and comes into sliding contact with a piston rod. The friction generating member has an annular elastic rubber portion which comes into sliding contact with the piston rod and a base portion to which the elastic rubber portion is fixedly attached. The elastic rubber portion is formed such that an upstream side and a downstream side are able to communicate with each other when a differential pressure between a one side chamber of the cylinder and a reservoir chamber reaches a predetermined pressure.

Abstract: A linear friction welding method capable of accurately controlling a welding temperature and capable of lowering the welding temperature is provided. The present invention is a linear friction welding method comprising: a first step of forming a welded interface by bringing one member into contact with the other member; a second step of repeatedly sliding one member and the other member on the same locus and discharging flash from the welded interface in a state where pressure is applied substantially perpendicularly to the welded interface; and a third step of forming a welded surface by stopping the sliding and setting the pressure to be not less than the yield stress and not more than the tensile strength of one member and/or the other member at a desired welding temperature.

Abstract: The present invention relates to a laminated film for fiber adhesion and/or fiber sheet surface protection in which a layer [I] containing a thermosetting composition [i] and a support film [II] are laminated, wherein the thermosetting composition [i] contains a thermal polymerization initiator (C) having a 10-hour half-life temperature of 65° C. or higher.

Abstract: Electrorheological fluid is loaded in a shock absorber 1 as hydraulic fluid 2. The shock absorber 1 controls a generated damping force by producing a potential difference in an electrode passage 19 to thus change viscosity of electrorheological fluid flowing in the electrode passage 19. A plurality of partition walls 20 is provided in the electrode passage 19 formed between an inner tube 3 and an electrode tube 18. Due to this configuration, a plurality of helical flow passages 24 is formed in the electrode passage 19. In this case, the flow passages 24 are each provided with a flow passage cross-sectional area change portion that allows the flow passage 24 to have a larger cross-sectional area on one side spaced apart from an entrance 24A1 side (an intermediate region F) at least compared to the entrance 24A1 side of the extension-side flow passage 24 (an inflow region E).

Abstract: The present invention provides a friction welding method capable of reducing the welding temperature and a friction welding method capable of obtaining a welded portion free of defects regardless the type of material. A frictional welding method in which one member is brought into contact with the other member and slides while a load is applied substantially perpendicularly to the interface to be welded, the frictional welding method comprising: a first step in which frictional welding is carried out by setting a pressure calculated from the area and the load of the interface to be welded to be equal to or higher than the yield stress and the tensile strength of one member and/or the other member at a desired welding temperature; and a second step in which frictional welding is carried out by lowering the load, wherein the first step and the second step are continuously carried out.

Abstract: Electrorheological fluid is loaded in a shock absorber (1) as hydraulic fluid (2). The shock absorber (1) controls a generated damping force by causing a potential difference to be generated in an electrode passage (19) and controlling a viscosity of the electrorheological fluid passing through this electrode passage (19). A plurality of partition walls (20) is provided between an inner cylinder (3) and an electrode cylinder (18). By being configured in this manner, the shock absorber (1) forms a plurality of helical flow passages (21) between the inner cylinder (3) and the electrode cylinder (18). In this case, an inclination angle of each of the partition walls (20) is not constant, and each of the partition walls (20) includes a sharply inclined portion (20A) inclined at a large angle on at least an entrance side of an extension-side flow passage (21).

Abstract: Provided are a long-life and inexpensive friction stir welding tool that is not dependent on the mode of friction stir welding or the type of material to be welded, and a friction stir welding method using the friction stir welding tool. The friction stir welding tool comprises a body portion having a shoulder portion, and a probe portion disposed on a bottom surface of the body portion, and is characterized in that the probe portion is spherical-crown shaped. Preferably, the shoulder portion is flat or convex, and preferably the hardness of the shoulder portion is greater than the hardness of the probe portion.

Abstract: A linear friction welding method capable of accurately controlling a welding temperature and capable of lowering the welding temperature is provided. The present invention is a linear friction welding method comprising: a first step of forming a welded interface by bringing one member into contact with the other member; a second step of repeatedly sliding one member and the other member on the same locus and discharging flash from the welded interface in a state where pressure is applied substantially perpendicularly to the welded interface; and a third step of forming a welded surface by stopping the sliding and setting the pressure to be not less than the yield stress and not more than the tensile strength of one member and/or the other member at a desired welding temperature.

Abstract: To provide a solid phase welding method and a solid phase welding apparatus which are possible to accurately control the welding temperature, to lower the welding temperature and to achieve a solid phase welding of the metallic materials. The present invention provides a solid phase welding method for metallic materials comprising, a first step of forming an interface to be welded by abutting end portions of one material to be welded and the other material to be welded and applying a pressure in a direction substantially perpendicular to the interface to be welded, a second step of raising a temperature of the vicinity of the interface to be welded to a welding temperature by an external heating means, wherein the pressure is set to equal to or more than the yield strength of the one material to be welded and/or the other material to be welded at the welding temperature.

Abstract: A shock absorber includes an outer tube, an inner tube fitted to the outer tube so as to be able to move forward and backward, a cylinder provided inside the outer tube and extending inside the inner tube, a rod extending from an end portion of the inner tube exposed from the outer tube to an inside of the cylinder, and a piston which is provided on the rod and divides the inside of the cylinder to form a gas chamber. On an outer peripheral surface of the piston, a first lubricating member, a first seal member, and a second seal member are provided in this order from a side closest to the gas chamber to a side away from the gas chamber. The members are in sliding contact with an inner peripheral surface of the cylinder.

Abstract: A seal member for a linear guide including a guide rail and slider movably set on the guide rail through rolling elements, the seal member, attached to the slider, configured to seal an opening of a gap between the guide rail and slider, the seal member includes: fibers having been impregnated with rubber or resin, wherein a sliding contact part of said seal member, which is in sliding contact with the guide rail, is made of the fibers.

Abstract: Electrorheological fluid is loaded in a shock absorber 1 as hydraulic fluid 2. The shock absorber 1 controls a generated damping force by producing a potential difference in an electrode passage 19 to thus change viscosity of electrorheological fluid flowing in the electrode passage 19. A plurality of partition walls 20 is provided in the electrode passage 19 formed between an inner tube 3 and an electrode tube 18. Due to this configuration, a plurality of helical flow passages 24 is formed in the electrode passage 19. In this case, the flow passages 24 are each provided with a flow passage cross-sectional area change portion that allows the flow passage 24 to have a larger cross-sectional area on one side spaced apart from an entrance 24A1 side (an intermediate region F) at least compared to the entrance 24A1 side of the extension-side flow passage 24 (an inflow region E).

Abstract: In order to make a configuration which achieves a new appeal to viewers such as players by emitting light while having a simple structure, a light emitting device attached to a housing (2) constituting a game device (1) includes a tubular member (30) having flexibility and translucency, and a light source disposed in the tubular member (30). An installation member on which the tubular member (30) is installed is provided in the housing (2) of the game device (1). An attachment portion for installing the tubular member (30) on the installation member may be formed on the tubular member (30). An installation protrusion may be provided in the installation member, and the attachment portion of the tubular member (30) may be configured by a groove having the same shape as a cross-sectional shape of the protrusion for attachment.

Abstract: A damping force control type shock absorber capable of achieving both air bleeding performance and damping force responsiveness at reduced cost. When a pilot valve (47) is closed during the extension stroke of a piston rod (6), a cylinder upper chamber (2A) is communicated with a back-pressure chamber (46) through a passage (73) including an orifice (76), a communicating passage (70), a pilot chamber (33), and a communicating passage (50). At this time, the cylinder upper chamber (2A) is not communicated with a cylinder lower chamber (2B); therefore, damping force responsiveness is ensured. Further, because there is no need to provide a check valve in the passage, it is possible to suppress an increase in manufacturing cost. Further, air entering the pilot chamber (33) moves upward through the communicating passage (70). Therefore, the air can be discharged into the cylinder upper chamber (2A) through the passage (73).

Abstract: Electrorheological fluid is loaded in a shock absorber (1) as hydraulic fluid (2). The shock absorber (1) controls a generated damping force by causing a potential difference to be generated in an electrode passage (19) and controlling a viscosity of the electrorheological fluid passing through this electrode passage (19). A plurality of partition walls (20) is provided between an inner cylinder (3) and an electrode cylinder (18). By being configured in this manner, the shock absorber (1) forms a plurality of helical flow passages (21) between the inner cylinder (3) and the electrode cylinder (18). In this case, an inclination angle of each of the partition walls (20) is not constant, and each of the partition walls (20) includes a sharply inclined portion (20A) inclined at a large angle on at least an entrance side of an extension-side flow passage (21).

Abstract: The present invention provides a friction welding method capable of reducing the welding temperature and a friction welding method capable of obtaining a welded portion free of defects regardless the type of material. A frictional welding method in which one member is brought into contact with the other member and slides while a load is applied substantially perpendicularly to the interface to be welded, the frictional welding method comprising: a first step in which frictional welding is carried out by setting a pressure calculated from the area and the load of the interface to be welded to be equal to or higher than the yield stress and the tensile strength of one member and/or the other member at a desired welding temperature; and a second step in which frictional welding is carried out by lowering the load, wherein the first step and the second step are continuously carried out.

Abstract: A seal member for a linear guide including a guide rail and slider movably set on the guide rail through rolling elements, the seal member, attached to the slider, configured to seal an opening of a gap between the guide rail and slider, the seal member includes: fibers having been impregnated with rubber or resin, wherein a sliding contact part of said seal member, which is in sliding contact with the guide rail, is made of the fibers.

Abstract: The present invention relates to a laminated film for fiber adhesion and/or fiber sheet surface protection in which a layer [I] containing a thermosetting composition [i] and a support film [II] are laminated, wherein the thermosetting composition [i] contains a thermal polymerization initiator (C) having a 10-hour half-life temperature of 65° C. or higher.

Abstract: A shaft structure installed in a shaft capable of making a power-transmission, the shaft structure including: a male component having a plurality of male splines formed on an outer peripheral part thereof; and a female component having a plurality of female splines formed on an inner peripheral part thereof, the inner peripheral part configured to allow the outer peripheral part of the male component to be engaged therein so that the male component and the female component can be slidably fitted with respect to each other in an axial direction thereby making up said shaft structure, wherein the outer peripheral part of the male component and the inner peripheral part of the female component have a fabric impregnated with rubber or resin interposed therebetween.

Abstract: A front fork includes a first shock absorber and a second shock absorber disposed respectively on both sides of a vehicle wheel. The first shock absorber includes a set of tubes configured to slide relative to each other; damping force generation parts configured to generate a damping force in accordance with the sliding of the tubes; and a spring configured to urge the set of tubes in a stretching direction. The second shock absorber includes a set of tubes configured to slide relative to each other; and a coil spring configured to urge the set of tubes in the stretching direction.