Silencer

A silencer for causing a reduction in exhaust noises of a pressure fluid exhausted from a fluid pressure device, comprising:

• a main body portion to which said fluid pressure device is connected and to which a pressure fluid from said fluid pressure device is introduced;
• a sound absorber retained within said main body portion and formed from filters made up of plural stacked layers having different opening areas;
• a disk shaped retaining member disposed coaxially with and separated a predetermined interval away from said main body portion, said sound absorber being sandwiched between said main body portion and said retaining member, said retaining member preventing said pressure fluid from flowing in an axial direction outside of said silencer, and forcing said pressure fluid to flow in a radial direction through said filters of said sound absorber and outside of said silencer;
• and
• a flow adjustment mechanism for gradually increasing a flow amount of the pressure fluid that flows in said radial direction and is exhausted to the outside from said main body portion through said sound absorber in a direction separating away from said fluid pressure device, said flow adjustment mechanism comprising a central core through which said pressure fluid flows in said axial direction, said central core extending in said axial direction and being disposed radially inward of all of said plural stacked layers that make up said filters, said retaining member sealing an end of said central core;
• wherein the opening areas of said filters are set so as to become gradually smaller directed from an upstream side formed at a side of said main body portion toward a downstream side formed at an exterior side of said sound absorber.