U.S. TSUBAKI FREE FLOW CHAIN
ENGINEERING INFORMATION
iii) Nominal spacing of conveyor supports. Proper operation of DOUBLE PLUS ® Chain is maintained by controlling the amount of deflection of the aluminum guide rail. This deflection is determined from the weight of the conveyed goods and the second moment of area, shown in Table 9c. To control deflection, supports should be spaced as shown in Fig. 3, in accordance with the following equation: Determining support spacing l (in.) = [ 384 • E • I • d • 12 ] 1 ⁄ 4 5 • 0.6 • W l = spacing support (inches) E = Young’s Modulus = 9.956 x 10 6 lbs./in. I = Second moment of area = in. 4 (See Table 9c.) d = Deflection = 0.079 in. W = Total conveyed weight = lbs./ft. Note: The total conveyed weight (W) is not always distrib- uted evenly between the two conveyor strands. This is taken into account with the factor 0.6.
iv) Finishing the ends of the conveying side. Put a chamfer on the ends of the upper rail that the chain’s small rollers travel on (Fig. 4). Figure 4–Location of Chamfer
Figure 3–Nominal spacing of conveyor supports ( l )
It is possible to prevent the chain’s large roller from dipping at the chamfered portion by installing a support for the large roller on the ends of the rail on the driven side. v) Aluminum frame with steel rail. (1) Two basic constructions are used when building guide rail with aluminum frame and steel rail: For C2030VRP-R3LS, a steel rail (no. 3) is arranged in the vertical position and lock screws (no. 4) are secured into the frame (no. 1) from both sides (see Fig. 5a). See Table 9d on page B-60 for dimensions and hardware.
Table 9c. Second Moment of Area Rail No.
Second moment of area ( I ) in. 4
C2030VRP-R3L C2040VRP-R4L
0.41148 0.96545
Figure 5a–Cross section of C2030VRP-R3LS
Aluminum Guide Rail C2050VRP-R4L
2.01905 C2050VRP-R3H 9.80904 C2060VRP-R4L 3.24668 C2060VRP-R4K 2.60692 C2030VRP-R3LS 0.42815 C2040VRP-R4LS 1.06460 C2050VRP-R4LS 2.29735 C2050VRP-R3HS 10.62133 C2060VRP-R4LS 4.12657 C2080VRP-R3LS 8.66648
Aluminum Frame
with Steel Rail
B-59
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