摘要:
A vegetable fiber cement moulded body of the present invention includes a nitrate as an additive agent. A method of manufacturing the same includes the steps of mixing raw materials including at least a vegetable fiber material, cement and water, moulding the mixed material, and curing this molded body, wherein a nitrate is added at the time of the aforementioned raw material mixing step or the aforementioned molding step. The molded body is preferably heated at the time of the curing step. According to the present invention, a vegetable fiber cement molded body of high strength which is not easily affected by substances that inhibit cement hardening and a method of manufacturing the same efficiently and at low cost are provided.
摘要:
A strap-like layered resin film (4) having the same width as a semiconductor chip (2) is cut out from a layered resin film (4F) and pressurized while being heated to the temperature below the transition temperature of a resin ribbon (4b), to be bonded onto a predetermined region (1R) of a lead frame (1). Subsequently, removing a cover ribbon (4a) of non-stickiness from the film (4), the semiconductor chip (2) is bonded to the predetermined region (1R) with the resin ribbon (4b) of stickiness heated to about the transition temperature, and further pressurized. With this structure, in bonding the lead frame and the semiconductor chip with the resin film as a bonding material, it is possible to prevent emergence of a void caused by sucking air and extending-off of the bonding material.
摘要:
An apparatus for cutting running workpiece includes a cutter for cutting, while the workpiece is running, the workpiece continuously supplied to run in a direction, and a travel member secured to the cutter, movable along the workpiece in contact with the workpiece. Since the travel member movable along the workpiece in contact with the workpiece is secured to the cutter, the cutter can follow a workpiece which is straight, curving or curving with a changing curvature. The cutter can be supported to be two-dimensionally movable to cut the workpiece in any form.
摘要:
A pneumatic radial tire for a small-size passenger car having substantially the same structure as in the conventional tire includes a pair of bead portions each with a monostrand bead core of a particular cross-sectional shape made by spiral winding of a rubberized steel wire having a particular diameter. The bead core has a particular ratio of distance between center points of adjacent steel wire windings to the diameter of the steel wire and a length overlapping a winding start point of the steel wire with a winding terminal point thereof.
摘要:
A pneumatic tire for small passenger vehicles having a pair of bead portions located at the internal periphery of a pair of sidewalls connected to a tread at both its edges, wherein the bead core of the bead portion is a mono strand bead core and the cross-section of the bead core is a close-packed structure unit made of 3 to 20 wire windings. The diameter D of the wire is 1.2 to 1.8 mm, and the ratio H/D of the distance H between the centers of adjacent wire windings to the diameter D of the wire is 1.01 to 1.20. The cross-sectional configuration of the bead core is such that N2=N1+1, where N1 is the wire number of the first row and N2 is the wire number of the second row counted from the bead base side. It is possible to improve steering characteristics (maneuverability) of such a pneumatic tire for small passenger vehicles by restraining the disorder of uniformity of the tire in the circumferential and longitudinal directions.
摘要:
A method and an apparatus for performing measurement by a resistivity method in order to detect the thickness of a sludge layer on the outer periphery of a shield machine. A Wenner electrode row (14) on the outer periphery of the machine is used to measure reference resistivities to thereby detect certain resistivities in the depth direction of the natural ground and the sludge layer thickness. At the same time, a dipole electrode row (16) is used to measure voltage distributions in the depth direction of the natural ground and in the direction of the arrangement of the electrodes. The ratios of the values measured by the measurement dipole electrodes to those measured by the reference Wenner electrodes are calculated, and their distribution is charted. When mutually equal values in the distribution map are connected together by continuous curves, a contour-pattern image is obtained, which enables a configuration of the collapse of natural ground to be determined. Such as image can be displayed either two-dimensionally or three-dimensionally by image processing. If a plurality of sets of electrode rows (14) and (16) are arranged in the circumferential direction of the machine, and resistivities are detected while current having different frequencies is supplied, the collapse of the natural ground can be measured quickly.
摘要:
A drum brake in which a parking brake is incorporated. A parking brake lever is mounted in the interior of a vehicle and is operable to pull a parking lever through a cable. The rotation of the parking lever causes a pair of brake shoes to be forced tightly against a brake drum. This results in the generation of a braking force. A stopper member is provided to limit the maximum angular position of the parking brake. This design prevents contact of the parking lever with a rotary shaft due to excessive pulling of the parking lever and thus damage of the rotary shaft as well as the parking lever.
摘要:
A frequency shift receiver for periodically receiving frequency shift (FS) signals while cyclically turning on and off a power supply for a preceding section of the receiver. An output from the discriminator is turned on and off in synchronism with the turning on and off of the power supply to prevent noise even when a frequency difference exists between the transmitter and receiver.