Conventionally, a ruler tool to guide a tool depending on a tool (for example, an electric saw, electric router, or the like) or on types of working at time of cutting and/or machining of a member to be worked by using a tool, especially at time of performing working on a member to be worked specified to some extent (see Patent References 1 to 3).
According to Patent Reference 1, a ruler tool is secured to a portion to be worked of a square member at time of forming a tenon and/or a tenon groove at an end of a square member being a member to be worked and configured to have a pair of guide rails to support a circular saw being a tool and a bar-like coupled body with an approximately V-shape to support the guide rails.
According to Patent References 2 and 3, inclined grooves are cut on a corner portion of a square member being a member to be worked and a base to be secured to a member to be worked and a pair of guide rails supported by the base in a manner in which angles can be changed.    Patent Reference 1: Japanese Utility Model Laid-open No. Hei 06-06480    Patent Reference 2: Japanese Utility Model Laid-open No. Sho 54-175694    Patent Reference 3: Japanese Utility Model Publication No. Sho 62-0223323
However, any one of ruler tools configured as above is directly secured to a member to be worked.
Therefore, at time of fixing a ruler tool depending on a desired work position (portion to be worked), due to inequality on a material surface, it is difficult to maintain fixing strength and the deflection easily occurs at time of working, causing the occurrence of errors at working accuracy. Positioning between a tool and a portion to be worked becomes difficult and the conventional technology is limited only to usage of special working and delicate working, as a result, causing general versatility of the ruler tool to be low.
Moreover, another problem arises that it is difficult to assemble and disassemble the ruler tool which is made large-scaled, causing inconvenience carrying at working sites.
In view of the above, it is an object to provide the ruler tool which improves working accuracy and its general versatility for use of kinds of a member to be worked or of kinds of working by positioning the ruler tool to a member to be worked.