Scroll type fluid machine

A scroll type fluid machine comprising:

• a stationary scroll,
• a movable scroll,
• a rotation preventing mechanism for preventing rotation of said movable scroll, and
• a rotary shaft,
• said stationary scroll including a stationary side wrap,
• said movable scroll including a first flat plate portion which engages with an eccentric portion of said rotary shaft, a movable side wrap which is formed as a separate body from said first flat plate portion and which matingly engages with said stationary side wrap, and a second flat plate portion which is formed integrally with said movable side wrap and which faces said first flat plate portion across said movable side wrap,
• said movable scroll being so constructed as to execute an orbital motion with said first flat plate portion coupled to said second flat plate portion or to said movable side wrap, and
• said stationary side wrap, said movable side wrap, said first flat plate portion, and said second flat plate portion together defining a fluid chamber.

A scroll type fluid machine comprising:

• a stationary scroll,
• a movable scroll,
• a rotation preventing mechanism for preventing rotation of said movable scroll, and
• a rotary shaft,
• said stationary scroll including a stationary side wrap,
• said movable scroll including a first flat plate portion which engages with an eccentric portion of said rotary shaft, a movable side wrap which is formed as a separate body from said first flat plate portion and which matingly engages with said stationary side wrap, and a second flat plate portion which is formed as a separate body from said first flat plate portion and said movable side wrap and which faces said first flat plate portion across said movable side wrap,
• said movable scroll being so constructed as to execute an orbital motion with said first flat plate portion, said movable side wrap, and said second flat plate portion coupled to one another, and
• said stationary side wrap, said movable side wrap, said first flat plate portion, and said second flat plate portion together defining a fluid chamber.