Abstract: An object of the present invention is to provide a construction machine which precipitates the removal of earth that is churned up onto a vehicle body from the vehicle body, which reduces transfer loads on a blade bracket, which improves the attachability of the blade bracket, and which achieves standardization of the blade bracket. The construction machine according to the present invention is constituted such that a frame of a crawler belt-type traveling body comprises a center frame, a pair of truck frames disposed on the outside of two side portions of the center frame, a connecting member which connects the center frame to the truck frames, and a blade bracket which is joined to the center frame and the connecting member.

Abstract: A work vehicle with a tilt floor, which is capable of improving the maintainability around an engine and the operability and comfortability of a driver's seat and its periphery, is provided. The work vehicle with a tilt floor includes a hinge mechanism which is provided on the front end of the tilt floor to enable to turn the tilt floor toward the front of the vehicle body, the rear of the tilt floor is formed to be higher than the front of the tilt floor so to cover the headroom of an engine disposed on the rear of the vehicle body, and an operator seat is disposed on the top surface at the rear of the tilt floor.

Abstract: An object of the present invention is to provide a construction machine which precipitates the removal of earth that is churned up onto a vehicle body from the vehicle body, which reduces transfer loads on a blade bracket, which improves the attachability of the blade bracket, and which achieves standardization of the blade bracket. The construction machine according to the present invention is constituted such that a frame of a crawler belt-type traveling body comprises a center frame, a pair of truck frames disposed on the outside of two side portions of the center frame, a connecting member which connects the center frame to the truck frames, and a blade bracket which is joined to the center frame and the connecting member.

Abstract: A working vehicle which comprises a work machine in the front section of the vehicle body and is provided with a counterweight in the rear section of the vehicle body, in which the counterweight is formed in a condition that the upper surface of the counterweight is positioned higher than the seating surface of an operator seat provided in the vehicle body, and in which a moment of the rear section of the vehicle can be increased without forming the counterweight to bulge backward, thus the work range for the work machine can be expanded without damaging the work performance of other functions.

Abstract: A tunnel waterproofing method comprises spraying a primary coating of concrete onto the excavation surface of a tunnel, installing thereon a waterproofing sheet having an adhesive layer operative to bond with concrete, and spraying a secondary coating of concrete against the adhesive side of the waterproofing sheet. Preferably, a buffer water conducting sheet is established between the primary concrete coating sprayed onto the excavation surface and the waterproofing sheet.

Abstract: A work vehicle with a tilt floor, which is capable of improving the maintainability around an engine and the operability and comfortability of a driver's seat and its periphery, is provided. The work vehicle with a tilt floor includes a hinge mechanism which is provided on the front end of the tilt floor to enable to turn the tilt floor toward the front of the vehicle body, the rear of the tilt floor is formed to be higher than the front of the tilt floor so to cover the headroom of an engine disposed on the rear of the vehicle body, and an operator seat is disposed on the top surface at the rear of the tilt floor.

Abstract: A tunnel waterproofing construction method that avoids dripping and fogging during spray application, organic solvents, unpleasant odors, and cracking, while providing workability, superior tunnel waterproofing characteristics, and economic advantage. A primary spray cement concrete is sprayed onto the excavated tunnel surface, and an ambient-temperature vulcanization-type rubber emulsion is sprayed onto the primary concrete, thereby forming a rubber film, and a secondary concrete coating is then established on the rubber surface. The primary spray cement concrete may be used to even out the irregular earthen excavation surface, and a drainage layer may be used along with the primary spray cement concrete surface.

Abstract: A tunnel waterproofing construction method that avoids dripping and fogging during spray application, organic solvents, unpleasant odors, and cracking, while providing workability, superior tunnel waterproofing characteristics, and economic advantage. A primary spray cement concrete is sprayed onto the excavated tunnel surface, and an ambient-temperature vulcanization-type rubber emulsion is sprayed onto the primary concrete, thereby forming a rubber film, and a secondary concrete coating is then established on the rubber surface. The primary spray cement concrete may be used to even out the irregular earthen excavation surface, and a drainage layer may be used along with the primary spray cement concrete surface.

Abstract: To provide a waterproofing construction method with which excellent waterproofing capacity can be assured. A tunnel waterproofing method characterized in that a primary spray cement concrete is sprayed on the excavation surface of the tunnel, after which a waterproofing sheet having adhesiveness with a secondary coating cement concrete is installed on said primary spray cement concrete surface and a secondary coating cement concrete is established on said waterproofing sheet surface. A buffer-water conducting layer may also be established on said primary spray cement concrete surface and a multilayer waterproofing sheet having adhesiveness with the applied cement concete may also be installed as a waterproofing sheet.

Abstract: Multilayered moldings, which comprise a laminate structure of (A) a layer of a polyphenylene sulfide resin (hereinafter referred to as PPS resin) composition and (B) a layer of a thermoplastic resin except PPS resins and which are characterized in that the PPS resin composition constituting the layer (A) comprises (A1) 100 parts by weight of a PPS resin, (A2) from 1 to 80 parts by weight of a thermoplastic resin having at least one functional group selected from epoxy groups, acid anhydride groups, carboxyl group and its salts, and carboxylate groups, and (A3) from 5 to 80 parts by weight of a thermoplastic resin that is similar in kind to the thermoplastic resin constituting the layer (B), have good hot water resistance, antifreeze resistance, chemical resistance, heat resistance, abrasion resistance, gas permeation resistance and interlayer adhesion.

Abstract: In order to elevate dust collecting efficiency by improving a suction work efficiency of a water filter type vacuum cleaner, an air containing dust particles sucked through a sucking opening by virtue of a motor driven blower provided built in a casing of the vacuum cleaner is caused to strike against water previously placed in a water tank to capture inappropriately large dust particles by the water. Moreover, other dust particles pass through a wire netting and then, are sucked together with the water to the blower by channeling the dust particles and water through a suction duct communicated with the blower. The dust particles contained in the sucked air are completely captured by the water by stirring the air and water at a high speed rotation of the blower, and the air and water are then conveyed into the water of the water tank. In the water tank, bubbles are generated by a bubble generating filter to naturally separate the water and the air, whereby clean exhaust air is provided.

Abstract: A thermoplastic resin composition comprising:(A) from 10 to 50% by weight of a maleimide copolymer of from 30 to 70 mol % of an aromatic vinyl monomer, from 30 to 50 mol % of a maleimide monomer, from 3 to 20 mol % of an unsaturated dicarboxylic anhydride monomer and from 0 to 50 mol % of other copolymerizable monomer;(B) from 40 to 80% by weight of a polyamide; and(C) from 3 to 40% by weight of a polyolefin polymer modified by from 0.1 to 10% by weight of an unsaturated dicarboxylic anhydride monomer and/or an unsaturated carboxylic acid monomer,wherein said maleimide copolymer is in the form of dispersed particles of from 0.01 to 1.0 .mu.m.

Abstract: An extra-high pressure water pump includes a cylinder barrel, a piston and a pair of double check valves. The piston is composed of a main piston and a lubricating oil piston. The lubricating oil piston has a double piston ring and is slidably mounted on an additional piston rod connected to the main piston head. Lubricating oil is filled in a lubricating oil room made between the main piston and the lubricating oil piston in the cylinder barrel. The pressure between the lubricating oil and water in the pump is naturally kept at the same level by sliding a position of the lubricating oil piston on the additional piston rod, so that a sudden imbalanced pressure between the lubricating oil and the water in the cylinder barrel does not break the lubricating oil piston.The extra-high pressure water pump supplies extra-high pressured water to its small carriable water jet gun.