# US 2013/0153838 A1 · Clamper, in-channel-head operation device, and clamping method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153838 A1 - Document ID: US20130153838A1 - Status: Published application - Kind: A1 - Application number: 13/818,529 - Filed: 2011-07-28 - Published: 2013-06-20 - Earliest claimed: 2010-08-23 - Assignees: Mitsubishi Heavy Industries, Ltd. - Inventors: Atsushi Kamiyoshi; Takanori Baba; Hidekazu Tanaka - Web page: https://patentgrep.com/patent/US20130153838A1 ## CPC - B66F 3/24: fluid-pressure operated (water-pressure machines F03B; hydraulic gearings F16H; cylinders, pistons F16J; fluid-pressure servomotors F15B) - F22B 37/003: {Maintenance, repairing or inspecting equipment positioned in or via the headers} - G21C 17/01: Inspection of the inner surfaces of vessels - G21C 17/017: Inspection or maintenance of pipe-lines or tubes in nuclear installations - G21D 1/006: {primary side of steam generators (secondary side of steam generators F22B1/00, F22B35/00 or F22B37/00)} - Y02E 30/00: Energy generation of nuclear origin - Y02E 30/30: Nuclear fission reactors - B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00) - F22B: METHODS OF STEAM GENERATION; STEAM BOILERS - G21C: NUCLEAR REACTORS (fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J) - G21D: NUCLEAR POWER PLANT - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A clamper (23) is inserted into a tube member (132) disposed in a tube plate (137) and clamps the tube member (132). Further, the clamper (23) includes a clamp mechanism (231) which has a contact portion (2311b) that contacts the tube plate (137) or the tube member (132) and inserts an insertion portion (2311a) into the tube member (132) so as to clamp the tube member (132) and a lifting and lowering mechanism (232) which lifts and lowers the clamp mechanism (231) in the insertion direction of the insertion portion (2311a). ## Claims ### Claim 1 A clamper which clamps a subject clamping member, the clamper comprising: a clamp mechanism which clamps the subject clamping member; and a contact portion which contacts the subject clamping member at a position different from the clamping position of the clamp mechanism in the clamping state of the clamp mechanism. ### Claim 2 (depends on 1) The clamper according to claim 1, further comprising: a lifting and lowering mechanism which lifts and lowers the clamp mechanism with respect to the subject clamping member, wherein the clamp mechanism includes the contact portion. ### Claim 3 (depends on 1) The clamper according to claim 1, wherein the clamp mechanism includes a clamp body which has an insertion portion to be inserted into the subject clamping member, a cotter which protrudes from the insertion portion and comes into friction-contact with the subject clamping member, a piston rod which presses the cotter so that the cotter protrudes from the insertion portion, and a rod cylinder which is integrated with the clamp body and drives the piston rod. ### Claim 4 (depends on 3) The clamper according to claim 3, wherein when the rod cylinder pulls the piston rod toward the opposite side to the insertion direction of the insertion portion, the piston rod presses the cotter so that the cotter protrudes from the insertion portion. ### Claim 5 (depends on 3) The clamper according to claim 3, wherein the cotter is disposed inside the clamp body so as to be movable in a reciprocating manner. ### Claim 6 (depends on 1) The clamper according to claim 1, wherein the insertion portion is separated from the clamp body and is disposed so as to be slidable on the clamp body. ### Claim 7 (depends on 1) The clamper according to claim 1, further comprising: a lifting and lowering mechanism which lifts and lowers the clamp mechanism with respect to the subject clamping member and has the contact portion; and an adjusting mechanism which moves the lifting and lowering mechanism in a reciprocating manner with respect to the subject clamping member. ### Claim 8 (depends on 7) The clamper according to claim 7, wherein the clamp mechanism includes a clamp body which has an insertion portion to be inserted into the subject clamping member, a cotter which protrudes from the insertion portion and comes into friction-contact with the subject clamping member, a piston rod which presses the cotter so that the cotter protrudes from the insertion portion, and a rod cylinder which is integrated with the clamp body and drives the piston rod. ### Claim 9 (depends on 8) The clamper according to claim 8, wherein when the rod cylinder presses the piston rod in the insertion direction of the insertion portion, the piston rod presses the cotter so that the cotter protrudes from the insertion portion. ### Claim 10 (depends on 8) The clamper according to claim 8, wherein when the rod cylinder pulls the piston rod toward the opposite side to the insertion direction of the insertion portion, the piston rod presses the cotter so that the cotter protrudes from the insertion portion. ### Claim 11 (depends on 4) The clamper according to claim 4, wherein the rod cylinder includes a check valve which prevents a reverse flow of a hydraulic fluid for driving the piston rod. ### Claim 12 (depends on 1) The clamper according to claim 1, wherein the subject clamping member is a member that is formed by a tube member, and the contact portion contacts the member. ### Claim 13 (depends on 12) The clamper according to claim 12, wherein the member is a tube plate. ### Claim 14 (depends on 1) An in-channel-head operation device comprising: the clamper according to claim 1. ### Claim 15 A method of clamping a subject clamping member by a clamper, the method comprising: causing the clamper to clamp the subject clamping member and then a part of the other portion of the clamper to contact a position different from the position where the subject clamping member is clamped.