Exhaust gas purification device

1. An exhaust gas purification device comprising:

a gas purifying body which purifies an exhaust gas discharged by an engine; and

a gas purifying housing which is provided with the gas purifying body therein,

wherein the exhaust gas purification device has a structure provided with a support bracket which supports the gas purifying housing, and is configured such that a bolt hole is formed in the support bracket, an insertion guide is formed by a bolt inserting notch which is provided in the support bracket, the bolt hole is left open at a side edge of the support bracket via the bolt inserting notch, and a first attaching bolt is engaged with and disengaged from the bolt hole via the insertion guide,

wherein an exhaust gas inlet pipe, which allows exhaust gas to flow from the engine into the gas purifying housing, is provided on an outside face of the gas purifying housing, and an inlet flange body is provided on an end of an exhaust gas inlet-side opening of the exhaust gas inlet pipe for bolt-fastening the inlet flange body with the exhaust side of the engine by a second attaching bolt,

wherein an engagement-disengagement directional axis along which the first insertion bolt engages and disengages with the insertion guide is parallel to a direction by which the second attaching bolt bolt-fastens the inlet flange body with the exhaust side of the engine;

wherein said insertion guide, said inlet flange body, said second attaching bolt, and said parallel direction and directional axis are configured so that when the first attaching bolt is positioned in engagement along the insertion guide at the bolt hole, the support bracket supports the exhaust gas purification device on the engine prior to completion of bolting by the first attaching bolt and bolt-fastening by the second attaching bolt thereby allowing by presence of said support easier completion of said bolting and bolt-fastening during installation, and so that when the first attaching bolt is positioned in engagement with the insertion guide upon unbolting and removal of the bolt-fastening during maintenance said support remains thereby allowing maintenance to be performed without complete uninstallation; and

wherein said directional axis is parallel to the direction of movement of the exhaust gas when the exhaust gas moves from the engine toward the exhaust gas inlet pipe, and

wherein the bolt hole is engaged with the attaching bolt via the bolt inserting notch, and the gas purifying housing is supported via the first attaching bolt.

2. The exhaust gas purification device according to claim 1 , wherein an outside case body is fitted to an outer side of an exhaust gas purifying case which is provided with the gas purifying body therein, the gas purifying housing is formed by the exhaust gas purifying case and the outside case body, and the support bracket is firmly fixed to the outside case body integrally.

3. The exhaust gas purification device according to claim 2 , wherein plural sets of the gas purifying bodies, the exhaust gas purifying cases and the outside case bodies are provided, a flange body for connecting the plurality of outside case bodies is offset with respect to a connection boundary position of the plurality of the gas purifying bodies, and the support bracket is firmly fixed to at least any one of the plurality of outside case bodies integrally.

4. The exhaust gas purification device according to claim 2 , wherein plural sets of the gas purifying bodies, the exhaust gas purifying cases and the outside case bodies are provided, a flange body for connecting the plurality of outside case bodies is offset with respect to a connection boundary position of the plurality of the gas purifying bodies, and the support bracket in which the insertion guide is formed is firmly fixed to the outside case body in a side in which a dimension in an exhaust gas moving direction is longer, in the plurality of outside case bodies.

5. The exhaust gas purification device according to claim 2 , wherein plural sets of the gas purifying bodies, the exhaust gas purifying cases and the outside case bodies are provided, a flange body for connecting the plurality of outside case bodies is offset with respect to a connection boundary position of the plurality of the gas purifying bodies, and the support bracket in which the insertion guide is formed is firmly fixed to the outside case body in which an exhaust gas inlet pipe is provided, in the plurality of outside case bodies.