Linear guide rail holding device

A linear guide rail holding device for holding a linear guide rail along a linearly extending vertical reference face formed on an installation surface, said linear guide rail having a first side and a second side opposite said first side, wherein said installation surface is provided with an abutting face extending in parallel with said reference face to define therebetween a space in which said linear guide rail is positionable, said holding device comprising:

• a pressure contact piece rotatable about a rotational axis thereof and having a lower surface engageable with said installation surface, an upper surface, and a peripheral side surface formed between said lower and upper surfaces,
• said peripheral side surface having a first engaging face and a second engaging face opposite said first engaging face with respect to said rotational axis such that said first and second engaging faces are pressingly engageable with said first side of said linear guide rail and said abutting face, respectively, to press said second side of said linear guide rail against said vertical reference face,
• said pressure contact piece being shaped such that the distance from said rotational axis to at least one of said first and second engaging faces gradually increases in a circumferential direction thereof,
• a screw insertion hole formed in said pressure contact piece and coinciding with said rotational axis, and
• a screw insertible through said screw insertion hole,
• said installation surface having a female threaded hole between said vertical reference face and said abutting face with which said screw is threadedly engageable.