Air chuck with measuring function
AssigneeSMC Corporation
InventorsSeiji Takanashi, Katsumi Hagiwara, Kouichirou Kanda
Life of this patent
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Abstract
A pair of jaw components 7a and 7b positioned on both sides of a casing 1 are attached to both the tips of a pair of parallel piston rods 6a and 6b which synchronously extend and contract in opposite directions by an action of an air pressure and the tips of a pair of guide rods 13a and 13b which synchronously extend and contract in opposite directions by a rack-and-pinion mechanism. By forming a magnetic scale 18 on a side face of one of the guide rods, 13b, the guide rod 13a is also used as a part of a dimension measuring mechanism. A sensor unit 20 for reading the magnetic scale 18 is attached to the casing 1.
Claims4
An air chuck with a measuring function, comprising:
- a casing having therein a pair of cylindrical holes and a pair of guide holes which extend in parallel with each other;
- pistons slidably housed in the pair of cylindrical holes and synchronously driven in opposite directions by an action of air pressure;
- a pair of piston rods which are integrally connected to the pistons and whose tips are protruded in opposite directions from both end faces of the casing;
- a pair of guide rods which are slidably inserted in the guide holes and whose tips are protruded in opposite directions from both end faces of the casing;
- racks formed in the pair of guide rods;
- a pinion which is rotatably mounted in a position between the pair of guide rods in the casing and which meshes with each of the racks;
- a pair of jaw components for gripping a workpiece, commonly attached to the tips of the piston rods and the tips of the guide rods on both sides of the casing;
- a magnetic scale which is formed along the axial line of the guide rods on a side face of one of the guide rod and is composed by a plurality of magnetic portions and non-magnetic portions which are arranged alternately;
- and
- a sensor unit for reading the magnetic scale, attached to the casing.
Dependencies are inferred from the claim text.