WE CLAIM:
Claim 1. A rod assembly (17A to 17R) configured to reciprocate along a slide hole (13, 103) of a fluid pressure 5 device, comprising:
a rod member (20, 20A to 20J, 108); and
a packing (34, 34A, 34B) attached to an outer circumferential part of the rod member (20, 20A to 20J, 108) and configured to slide along the slide hole (13, 103). 10
Claim 2. The rod assembly (17A to 17R) according to claim 1, wherein:
the rod member (20, 20A to 20J, 108) includes, in the outer circumferential part, a stopper receiving groove (50) 15 extending in a circumferential direction;
a stopper member (52) divided into a plurality of elements in the circumferential direction is installed into the stopper receiving groove (50); and
the packing (34, 34A, 34B) covers the stopper member 20 (52), and thus the stopper member (52) supports the packing (34, 34A, 34B) and is prevented from coming off the stopper receiving groove (50).
Claim 3. The rod assembly (17A to 17R) according to 25 claim 1, wherein the packing (34, 34A, 34B) also functions as a damper configured to relieve impact occurring when the rod member reaches a stroke end.
Claim 4. The rod assembly according to claim 1, 30 wherein the rod member has a hollow shape.
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Claim 5. The rod assembly according to claim 4, wherein:
a damper member (40, 40A, 4OB) configured to relieve 5 impact occurring when the rod member reaches a stroke end is attached to an end portion of the rod member; and
the damper member (40, 40A, 40B) airtightly or liquid-tightly blocks up a hollow portion of the rod member.
10 Claim 6. The rod assembly according to claim 5,
wherein an outer circumferential part of the damper member (40, 40A, 40B) is attached to an inner circumferential part of the rod member.
15 Claim 7. The rod assembly according to claim 5,
wherein a supporting member (62) configured to be harder than the damper member (40, 40A, 40B) and to support the damper member (40, 40A, 40B) is disposed in the hollow portion of the rod member.
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Claim 8. The rod assembly according to claim 1, wherein:
the rod member includes a magnet receiving groove (49) in an outer circumferential part thereof; and
25 a magnet (48, 48A) having an annular shape is installed
in the magnet receiving groove (49).
Claim 9. The rod assembly (17B) according to claim 1,
wherein:
30 the packing (34A) is provided with at least one magnet
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receiving groove (70) having a depth in an axial direction; and
a magnet (72) is installed in the at least one magnet receiving groove (70). 5
Claim 10. The rod assembly (17B) according to claim 9, wherein:
an outer circumference of the packing (34A) has a non-
circular shape;
10 the at least one magnet receiving groove (70) comprises
a plurality of magnet receiving grooves (70) disposed at intervals in a circumferential direction; and
the magnet (72) is installed in only part of the plurality of magnet receiving grooves (70). 15
Claim 11. A fluid pressure device, comprising:
a body containing therein a slide hole (13, 103); and
a rod assembly (17A to 17R) disposed so as to
reciprocate along the slide hole (13, 103);
20 wherein the rod assembly (17A to 17R) includes a rod
member (20, 20A to 20J, 108) and a packing (34, 34A, 34B) attached to an outer circumferential part of the rod member (20, 20A to 20J, 108) and configured to slide along the slide hole (13, 103). 25
Claim 12. The fluid pressure device according to claim 11, wherein the fluid pressure device is configured as a fluid pressure cylinder (10A to 10G), a valve device, a length-measurement cylinder, a sliding table, or a chuck 30 device.
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