# US 2014/0150229 A1 · Lock ring mounting/demounting jig > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150229 A1 - Document ID: US20140150229A1 - Status: Published application - Kind: A1 - Application number: 14/094,755 - Filed: 2013-12-02 - Published: 2014-06-05 - Earliest claimed: 2007-08-14 - Assignees: Topy Kogyo Kabushiki Kaisha - Applicants: Topy Kogyo Kabushiki Kaisha - Inventors: Kentaro OBA; Yukio NAKAMURA; Etsuro SUGISAKI - Web page: https://patentgrep.com/patent/US20140150229A1 ## CPC - B60B 25/04: Rims with dismountable flange rings, seat rings, or lock rings - B60B 25/20: Arrangement of screws, bolts, or shouldered pins - Y10T 29/53657: to apply or remove a resilient article [e.g., tube, sleeve, etc.] - B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An object of the present invention is to provide a jig that does not require an operator to hold a lock ring against the elastic repulsion force of the lock ring that attempts to contract in a radial direction when the lock ring is attached to a rim base, the jig that is safe because there is no need for the operator to support the weight of the lock ring and can maintain a state in which, when the space between the ends of the lock ring is increased, the inside diameter side of the lock ring is a perfect circle or is close to a perfect circle. Thus, a lock ring mounting/demounting jig of the present invention is formed of a pair of jigs, the pair of jigs can be attached at both ends (4a, 4b) of a lock ring (4) and on the radial outside of the lock ring (4), and the angle formed by the direction in which the space between the pair of jigs expands and contracts and the longitudinal direction of each jig is changeable. ## Claims ### Claim 1 A lock ring mounting/demounting jig, wherein the lock ring mounting/demounting jig is formed of a pair of jigs, the pair of jigs can be attached at both ends of a lock ring and on a radial outside of the lock ring, an angle formed by a direction in which a space between the pair of jigs expands and contracts and a longitudinal direction of each jig is changeable, and centers with respect to which the angle changes are located on a central axis of a bolt that connects the jigs. ### Claim 2 (depends on 1) The lock ring mounting/demounting jig according to claim 1, wherein female screw holes are formed at both ends of the lock ring, fixing bolts threadably engage the female screw holes, and the fixing bolts are placed through through-holes formed in support members of the jigs. ### Claim 3 (depends on 1) The lock ring mounting/demounting jig according to claim 1, wherein each of the pair of jigs is further divided into two parts, and the lock ring is fixed by being clamped between the two parts. ### Claim 4 (depends on 3) The lock ring mounting/demounting jig according to claim 3, wherein the two parts have formed therein grooves of U-shaped cross section, and the two parts clamp the lock ring in a state in which the lock ring is inserted in the grooves of U-shaped cross section. ### Claim 5 (depends on 1) The lock ring mounting/demounting jig according to claim 1, comprising: a rod-like expansion member with a male screw portion, wherein one of the pair of jigs includes a support mechanism that rotatably supports the expansion member and supports a thrust acting on the expansion member, and in the other of the pair of jigs, a female screw hole threadably engaging the male screw portion of the expansion member is formed, and the space between the pair of jigs expands or contracts by rotation of the expansion member. ### Claim 6 (depends on 1) The lock ring mounting/demounting jig according to claim 1, wherein the expansion member includes two male screw portions in which male screws, of which one is opposite in direction to the other, are formed, in each of the pair of jigs, a female screw hole is formed, female screws of the female screw holes in the pair of jigs are opposite in direction, one male screw portion of the expansion member threadably engages the female screw hole of one jig, the other male screw portion of the expansion member threadably engages the female screw hole of the other jig, and the space between the pair of jigs expands or contracts by rotation of the expansion member. ### Claim 7 (depends on 1) The lock ring mounting/demounting jig according to claim 1, wherein each of the pair of jigs is attached to an outer side of a vehicle with respect to an axial direction of a rim base to which the lock ring is attached. ### Claim 8 (depends on 1) The lock ring mounting/demounting jig according to claim 1, wherein in place of making the angle formed by the direction in which the space between the pair of jigs expands and contracts and the longitudinal direction of each jig changeable, the angle formed by the direction in which the space between the pair of jigs expands and contracts and the longitudinal direction of each jig is fixed.