BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an assembly diagram showing the entire side elevation of an X-type robot welding gun according to an embodiment of a resistance spot welder of the invention.
FIG. 2 is an exterior front elevation of the apparatus of the invention.
FIG. 3 is an exterior front elevation of the apparatus of the invention.
FIG. 4 is a side elevation showing an embodiment of the invention apparatus and presents an assembly diagram corresponding to various gun arms.
FIG. 5 is an enlarged sectional view taken in the direction of arrow A-A of FIG. 1 and showing a spindle connecting device.
FIG. 6 is a sectional view showing another embodiment of a spindle connecting device according to the invention.