U.S.TSUBAKI, INC.
VII. Take-up. The amount of take-up l = (L x 0.02) + marginal length (0.02 = Allowable chain wear elongation 2%) Allow for some sagging (up to 10% of the span) in the chain on the bottom of the driver sprocket. Adjust the take-up so that the slack does not exceed the values in Table 5f. (see Fig. 10.) In addition, the total arc of contact between the chain and sprocket should be more than 130˚. If take-up cannot be set up as shown in Fig. 11 due to space limitations, refer to Fig. 12.
(3) Important points when handling steel guide rail • When cutting the guide rail with steel rail 1)Cut anywhere other than the central portion or screwed portions of the rail. 2)Remove burrs, etc., that occur on the cut surface. 3)Insert lock screws into the steel rail and inner rail along with the inner rail and main rail at 0.6 - 1.2 in.
(15 - 30 mm) from the cut end. 4)Machine all parts individually. 5)Completely remove all burrs before reassembly.
VI. Transferring objects between conveyors. To convey pallets in a stable condition at the transfer portion of the conveyor, install a roller between the two conveyors or the shafts of the sprockets (see Fig. 9). Be sure that the distance l from the ends of the rail to the roller that supports the pallets is less than 1/2.5 times the pallet length in the conveying direction. After connecting the rail, put small chamfers on the mating faces of the steel rail where steps occur (in both vertical and lateral direc- tions). These prevent the chain rollers from getting caught at these areas. Note: Use screws according to Table 5d when reassembling the conveyor. • When connecting the rail
Table 5f. Chain Slack for DOUBLE PLUS ® Chain size Normal slack in. (mm)
Maximum slack in. (mm)
C2030
.10 (25)
2.95 (75)
C2040
1.38 (35)
4.13 (105)
C2050
1.57 (40)
4.72 (120)
C2060
1.97 (50)
5.90 (150)
C2080
2.56 (65)
7.48 (190)
Figure 10–Slack tolerance
Figure 9–Install a roller as shown for a straight line transfer
Figure 11–Take-up arrangement
Figure 12–Take-up arrangement for limited space
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