Fastened assembly body, connector, and hydraulic cylinder unit

A fastener for fastening two members, the fastener comprising:

• a first engaging piece whose fastening surface is formed in a longitudinal direction;
• a second engaging piece whose fastening surface is opposed to said fastening surface and formed in the longitudinal direction;
• a connecting portion having a width smaller than those of said engaging pieces and connecting the engaging pieces at a base end;
• and
• a fastening member for elastically deforming tips of said engaging pieces in a direction in which the respective fastening surfaces approach each other.

A fastener for connecting two members, the fastener comprising:

• a first engaging piece integrally provided with a first connecting portion, and having a fastening surface wider than said first connecting portion and formed in a longitudinal direction and an abutting face formed so as to be inclined at a tip thereof;
• a second engaging piece integrally provided with a second connecting portion, and having a fastening surface wider than said second connecting portion and shifted in the longitudinal direction from and mutually opposed to said fastening surface and formed in the longitudinal direction, and a second engaging piece having an abutting face abutting on said abutting face and formed at a tip thereof;
• and
• a screw member screw-connected to a screw hole formed in one of said engaging pieces, penetrating a through hole formed in the other of said engaging piece with a diameter larger than that of said screw hole, and making said engaging pieces move along said abutting face in a direction in which the respective fastening surfaces approach each other.

A fluid pressure cylinder unit for driving an object to be driven in a straight-line direction by a fluid pressure, the unit comprising:

• a cylinder tube, in which a communication groove extending and opened in a longitudinal direction along a connection surface and an engagement groove provided with an engagement surface parallel to said connection surface and communicating with said communication groove are formed and a piston provided with a piston rod is accommodated axially and reciprocably;
• an attachment, in which a communication groove extending and opened in the longitudinal direction along a connection surface contacting with said connection surface and an engagement groove provided with an engagement surface parallel to said connection surface and communicating with said communication groove are formed;
• and
• a fastener including, in a state in which said communication grooves are opposed to each other and said cylinder tube and said attachment are made to contact by said connection surfaces, a first engaging piece whose fastening surface is formed in the longitudinal direction and which is inserted into said engagement groove of said cylinder tube in the longitudinal direction, a second engaging piece whose fastening surface is opposed to said fastening surface and formed in the longitudinal direction and which is inserted into said engagement groove of said attachment in the longitudinal direction, and a connecting portion having a width smaller than those of said engaging pieces and connecting each of said engaging pieces at a base end thereof,
• wherein when said fastener is embedded in said cylinder tube and said attachment and said engagement surfaces and said fastening surfaces contact with one another, said cylinder tube and said attachment are connected.

A fluid pressure cylinder unit employing a rodless cylinder for driving a reciprocating body in a straight-line direction by fluid pressure, the unit comprising:

• a casing of the rodless cylinder in which a piston reciprocated in the straight-line direction by the fluid pressure and connected to said reciprocating body is incorporated and in which a communication groove extending and opened along a connection surface formed at an outer periphery and an engagement groove communicating with said communication groove and being wider than said communication groove are formed;
• an attachment in which a communication groove extending and opened along a connection surface contacting with said connection surface and an engagement groove communicating with said communication groove and being wider than said communication groove are formed;
• and
• a fastener including, in a state in which the respective communication grooves are opposed to each other and said casing and said attachment are made to contact respectively by said connection surfaces, a first engaging piece inserted into said engagement groove of said casing in a longitudinal direction, a second engaging piece inserted into said engagement groove of said attachment in the longitudinal direction, and a connecting portion for connecting those engaging pieces, the fastener being embedded in said casing and said attachment.

A fluid pressure cylinder unit for driving an object to be driven in a straight-line direction by fluid pressure, the unit comprising:

• a cylinder tube for accommodating a piston;
• a piston rod attached to said piston and protruding from an end face of said cylinder tube to outside;
• and
• a rod cover mounted attachably and detachably on the end face of said cylinder tube,
• wherein said rod cover is provided with a functional component exhibiting a functional effect in accordance with a use application.