Abstract: A working machine is constituted so as to mount a guard cover hinge, a radiator duct, a canopy right support, a hood catch and the right end part of a seat stand on a radiator support. The working machine further comprises a mounting column provided on the opposite side of the radiator support so as to mount a hood hinge, a left side panel, the left end part of the seat stand and a muffler cover thereon. According to such a structure, a mounting member shared by a plurality of constituting members can be used also as a positioning support between members, and the workability in assembling can be improved.

Abstract: A rear half part of a surface of a main body of a working oil tank installed in line with a control valve opposing to the valve is dented in an inclining surface shape in the direction moving away from the valve so that between both the tank and the valve, is formed a working space for attaching and detaching a pressure compensating spool, while return tubes are separately connected to the upper and the lower side of a filter case side wall within the body. Within the body, is provided a cylindrical filter case having a bottom in which a return filter for return oil is housed, and the return tubes are connected to the case side wall in a state of communicating with the inside of the filter case.

Abstract: A return oil filter for filtering hydraulic oil is installed on a bottom within a box-like tank which is for storing hydraulic oil, and a window hole-like filter loading/unloading port, as well as a removable lid for closing the filter loading/unloading port, are provided in a rear surface of the tank body at a position higher than a highest level of the hydraulic oil L in the tank body. A connection pipe for connection between the filter and an outer pipe is disposed within the tank body in a state in which a main pipe thereof is inclined forwardly downward from the filter loading/unloading port side toward the filter, whereby the connection pipe and the filter can be removed backward in one piece with each other from the filter loading/unloading port.

Abstract: A counterweight mounting structure for construction machine to which a counterweight is connected through a gap to an exterior constituting an upper rotating body is constituted such that a recessed groove is provided on an end on a connection side of the counterweight, an elastic soundproof material is installed in the recessed groove, and the soundproof material protruding from the recessed groove is brought in contact with, and pressed against an end on the connection side of the exterior when the counterweight is mounted. As a result, there is provided the counterweight mounting structure whose soundproof capability does not decrease even after the counterweight is mounted/dismounted.

Abstract: In a manufacturing method for construction machine according to the present invention, an oil supply port of a fuel tank is disposed near an inner periphery-side guard panel as a standard which is mounted on an innermost periphery side, and in case of mounting the inner periphery-side guard panel, the same guard panel is mounted so that an opening formed in a side wall of the guard panel and the oil supply port are made corresponding to each other, while in case of mounting an outer periphery-side guard panel disposed outside the inner periphery-side guard panel, a depressed portion is formed in a side wall of the outer periphery-side guard panel in accordance with the spacing between the side wall of the outer periphery-side guard panel and the oil supply port, and the outer periphery-side guard panel is mounted so that an opening formed in the depressed portion and the oil supply port are made corresponding to each other.

Abstract: A counterweight mounting structure for construction machine to which a counterweight is connected through a gap to an exterior constituting an upper rotating body is constituted such that a recessed groove is provided on an end on a connection side of the counterweight, an elastic soundproof material is installed in the recessed groove, and the soundproof material protruding from the recessed groove is brought in contact with, and pressed against an end on the connection side of the exterior when the counterweight is mounted. As a result, there is provided the counterweight mounting structure whose soundproof capability does not decrease even after the counterweight is mounted/dismounted.

Abstract: A working machine is constituted so as to mount a guard cover hinge, a radiator duct, a canopy right support, a hood catch and the right end part of a seat stand on a radiator support. The working machine further comprises a mounting column provided on the opposite side of the radiator support so as to mount a hood hinge, a left side panel, the left end part of the seat stand and a muffler cover thereon. According to such a structure, a mounting member shared by a plurality of constituting members can be used also as a positioning support between members, and the workability in assembling can be improved.

Abstract: Disclosed is a sheathing material for a construction machine and a method for producing the same, in which lightweighting can be attained without using a reinforcing member, and which is not greatly flexed even if a load is applied. The sheathing material for a construction machine which is lightweighted and has a flexure rigidity is obtained by molding a resined shell 1d having a hollow construction by rotational molding, filling a resin foamed body 1e such as a hard polyurethane foam within the resined shell 1d to set it, thereby providing a sandwiching construction, and adjusting filling density of the resin foamed body 1e.

Abstract: A construction machine equipped with an air cleaner is disclosed which does not affect the efficiency of an engine and that of a radiator and which makes an effective utilization of space. A rotatable superstructure is partitioned into a front portion and a rear portion by means of a shielding plate, one end of an attachment capable of rise and fall is secured to near the center of the said front portion, an engine space and a radiator space for accommodating an engine and a radiator respectively therein are formed in said rear portion, and an air cleaner for filtering the air to be fed to the engine is disposed between the mounted portion of the attachment and the shielding plate.

Abstract: A guard cover for a construction machine includes first guard cover (12), the first guard cover covering devices to be inspected from both front and upper surface sides of the devices, the first guard cover capable of being opened and closed vertically, and a second guard cover (13) which becomes contiguous to the first guard cover (12) when closed and which covers devices to be subjected to servicing from a side of the devices, the second guard cover capable of being opened and closed in the transverse direction. According to this construction, the first and second guard covers can be opened each independently, so the devices to be subjected to inspection can be inspected by an operator within an opened range of the first guard cover (12) and the devices to be subjected to servicing can be serviced by a serviceman within an opened range of the second guard cover (13).

Abstract: A crystallizable, purified chondroitinase ABC having a molecular weight of about 100,000 dalton by the measurement of the SDS-polyacrylamide gel electrophoresis (SDS-PAGE) and the measurement by the gel permeation chromatography method, having alanine as the N-terminal amino acid and proline as the C-terminal amino acid is disclosed. A process for the purification of the crystallizable purified chondroitinase ABC comprising removing nucleic acid from an surfactant solution extract obtained from cells of chondroitinase ABC-producing microorganisms and chromatographically treating by concentration gradient elution using a weak cation exchange resin or a strong cation exchange resin is disclosed. A composition comprising a chondroitinase and serum albumin, gelatin, or a nonionic surfactant is used to treat disc displacement. The enzyme is isolate from Proteus vulgaris ATCC 6896.

Abstract: A hydraulic working machine includes a bonnet assembly extending along a rear end and opposite sides of a cab on a revolving upper structure so as to cover an internal combustion engine, a cooling fan, a radiator, and a hydraulic pump. The bonnet assembly is composed of first to three bonnets. The first bonnet and the second bonnet each cover an upper portion and a side portion of the internal combustion engine. The third bonnet covers a hydraulic oil tank and a fuel tank for the internal combustion engine. The first bonnet can be opened and closed in the horizontal direction and hence makes no contact or interference with a seat in the cab. The horizontally openable first bonnet is disposed above a counterweight and hence does never interfere with the counterweight. With the bonnet assembly thus arranged, the components mounted in the upper structure can be readily exposed in condition ready to maintain without involving dismounting of the seat even when the revolving upper structure is small in size.