2-29
Installation
2Unpacking to Installation
2.2.8 Passing air hoses and cables through the shaft (RH-3FRH/6FRH/12FRH/20FRH series)
For this robot, customer prepared air hoses and cables can be pulled out from the No. 2 arm by passing through
the shaft. For how to pass air hoses and cables through the shaft, refer to the following.
(1) Specifications of internal air hoses and cables
Use the air hoses and the cables, which have flexibility, capability of being repeatedly bent and twisted, and high
wear resistance, for the internal use.
Select the air hose and the cable according to the specifications shown in
Table 2-7 ： Specifications of internal air hoses and cables
(2) Customer prepared products
shows the necessary products for passing air hoses and cables through the shaft. The user needs to
prepare the products.
Table 2-8 ： Customer prepared products
Model
Shaft inside
diameter
Space factor
(recommended)
Highest speed of
J3 axis
Minimum R of
bending
Operating angle of
J4 axis
RH-3FRH
φ11mm
50% or less
1,100mm/sec
20mm
±360deg
RH-6FRH
φ18mm
50% or less
2,400mm/sec
25mm
±360deg
RH-12FRH
φ18mm
50% or less
2,800mm/sec
25mm
±360deg
RH-20FRH
φ21mm
50% or less
2,400mm/sec
25mm
±360deg
Name
Qty.
Usage and recommended product
Expanding sleeve
Moderate
quantity
Protecting the air hoses and cables, and improving the twisting rigidity
Recommended expanding sleeve: EXP-13-PT (manufactured by Kitagawa Industries Co.,
Ltd.)
Cushion rubber
Moderate
quantity
Protecting the bent portion and the fixed portion of the twisted end.
Recommended cushion rubber: silicon rubber, thickness of 1mm, dimensions of 30mm ×
80mm
Cable tie
Moderate
quantity
Fixing the air hoses and the cables
Silicon grease
Moderate
amount
Reducing friction and wear when the air hoses and the cables slide
Recommended silicon grease: G-501 (manufactured by Shin-Etsu Chemical Co., Ltd.)
Liquid gasket
Moderate
amount
Sealing the outlet at the tip of the shaft (for the oil-mist and clean specification models
only)
Recommended liquid gasket: 1212 (manufactured by Three Bond Co., Ltd.)
1) The internal air hoses and cables are bent
and twisted according to the operations of
the J3 and J4 axes. Structurally, the
twisting occurs inside the shaft, and the
bending occurs inside the expanding sleeve.
Without the expanding sleeve, the twisted
air hoses and cables may run onto the guide
portion of the fixing plate, and the air hoses
may be bent or broken.
2) Do not place the connector connecting part
and the air hose relay part in the binding or
twisting range.
Bending range
Twisting
range
Expanding sleeve
Plate for fixation
【Precautions for implementation of moving part】
