Horizontal multiple articulation type robot

Abstract

A horizontal multijoint type robot is so constructed that it comprises a first arm connected through a first joint shaft to a base, a second arm connected through a second joint shaft to the first arm, and a working shaft provided rotatably and movably up and down on the distal end of the second arm, and that the arm length L 1 of the first arm and the arm length L 2 of the second arm are equal to each other so that the second arm is able to overlap the first arm.

1 . A horizontal multijoint type robot comprising a first arm connected through a first joint shaft to a base, a second arm connected through a second joint shaft to the first arm, and a working shaft provided rotatably and movably up and down on the distal end of the second arm, and the arm length of the first arm and the arm length of the second arm being equal to each other so that the second arm is able to overlap the first arm.  
   
   
       2 . A horizontal multijoint type robot comprising a first arm connected through a first joint shaft to a base, a second arm connected through a second joint shaft to the first arm, a third arm connected through a third joint shaft to the second arm, and a working shaft for working provided rotatably and movably up and down on the distal end of the third arm, and the arm length of the first arm and the sum of the arm lengths of the second arm and the third arm being equal to each other so that the second arm and the third arm are able to overlap the first arm.  
   
   
       3 . The horizontal multijoint type robot as set forth in  claim 2  wherein a second connection portion having the second joint shaft is elongated.  
   
   
       4 . The horizontal multijoint type robot as set forth in any one of  claim 3  wherein the base is able to be secured to a wall or ceiling.  
   
   
       5 . The horizontal multijoint type robot as set forth in  claim 4  wherein all the joint shafts are of hollow shafts to permit wiring to pass therethrough, and all the arms have a hollow portion.