PROBLEM TO BE SOLVED: To provide a connector for a switch attachment device which does not require refueling for preventing seizure and galling. SOLUTION: A connecting tool 31 is a connecting member of a switch attachment device, a connecting portion between an upper crank and a link, a connecting portion between a link 25a and an elbow metal 27a, a connecting portion between a lower crank and an offset link, and a connecting portion. , Used for the connection between the offset link and the crank of the switch. The connector 31 is made of a special copper alloy and has a shaft portion 51 to be inserted into the insertion holes 37 and 39 formed in the link 25a and the elbow metal 27a. The sliding surface 53 of the shaft portion 51, which slides along the inner surfaces of the insertion holes 37 and 39, is subjected to oil-impregnated treatment by dispersing and sintering a solid lubricant mainly composed of graphite. As a result, it is possible to prevent seizure and galling of the sliding surface 53 of the shaft portion 51, so that it is not necessary to perform periodic refueling work, maintenance work is not required, and costs can be suppressed. [Selection diagram] Fig. 3
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