U.S. TSUBAKI CABLEVEYOR
SAMPLE SELECTION Example 1.Situation . . . . . . . . . . . . . . . . . . .Indoor, normal temperatures 5.Allowable bending radius 2.Moving stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29.5 ft. . . . . . . . . . . . . . . .cable 10.63 inches, oil hoses 10.24 inches 3.Number and external diameter of the cables or hoses . . . . . 6.The cables or hoses will be set horizontally on one line. . . . . . . . . . . . . . . . . . . .cables 1.73 • 2, oil hoses 1.42 • 2 7 The fixed bracket will be in the middle of the length of travel. 4.Weight at installation . . . . . . .cables 2.01 lbs./ft. • 2, oil hoses 8.Speed of travel . . . . . . . . . . . . . . . . . . . . . . . . . . .100 ft./min. . . . . . . . . . . . . . . . . . . .1.34 lbs./ft. • 2, total weight 6.7 lbs./ft. 9.Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .none
STEP 1. Specifications
STEP 6. Standard supporter selection Supporter hole diameter may be calculated by the following equation, where D 1.1d and where D is rounded off to the nearest even whole number, making the diameter 1.89 • 2, 1.58 • 2. The supporter length B ’ is – B ’ = D + C + Min.36 (C = Min.1.42) B ’ = {(1.89 • 2) + (1.58 • 2)} + (0.16 • 3) + 1.42 = 8.82 inches The supporter dimension table shows that a supporter of this size fits cables/hoses of 1.73 inches the best. When deciding on the supporter dimensions, the next largest size appearing on the table must be chosen when the calculated figure does not appear. For example, a value of 8.82 would take the next bigger figure on the table, or 0.98. As the supporter length B ’ becomes greater, the spaces between holes (C) must also increase to maintain balance.
See STEP 1 of the SELECTION outline (page B-101).
STEP 2. Tentative selection
From the capability graph on page B-102, TK130 would satisfy what is required since it has no supporting roller, and since the moving stroke is 29.5 ft. (length of travel) and 6.7 lbs./ft. for cable and hose weight.
STEP 3. Selection of the bending radius
R11.81 and R15.35 will satisfy the requirement for a larger than allowable bending radius (10.63 inches).
STEP 4. Calculation of the number of chain links
Once the chain size has tentatively been referred to, the number of chain links may be calculated according to the following equation. S 354 – + R +15.35 ––––––– + 11.81 + 15.35 2 2 l = ––––––––––– = ––––––––––––––––––––– = 44.9 links 5.12 5.12 The fraction is rounded off to l = 45 Links.
STEP 7. Amount of supporters needed. l – 1 45 – 1
‘
‘
Where: l = Number of chain links
n =
=
= 22 pieces
2
2
n = Number of supporters
STEP 8. Cableveyor choice
‘
Chain: TK130, R11.81 Assembly: 45 links + brackets at both ends Supporter size: 2.56 • 9.84 (split type)
Supporter hole diameter: D 1 = 1.89, D 2 = 1.89, D 3 = 1.58 D 4 = 1.58 Supporter hole pitch: b 1 = 1.77, b 2 = 2.36, b 3 = 2.17, b 4 = 1.97, b 5 = 1.58
STEP 5. Freespan confirmation
Freespan F (without support rollers) is confirmed by adding the margin length (K ’ ) + (S/2). 354 130 • 45 links – (––––– + 300 ) 2 K ’ = ––––––––––––––––––––––––––– = 8.03 inches 2 S 354 F 0 = – + K ’ + ––––– + 8.03 = 85.20 inches 2 2 From the capability graph on page B-102 a freespan of up to 17.22 ft. is approved for a cable/hose weight of 6.72 lbs./ft. Since F 0 = 15.43 ft. is less than 17.22 ft., the TK130, R11.81 chain size is the most suitable. If F 0 > 17.22 ft., a larger chain size should be used — TK180, R11.81, for example.
SAMPLE LAYOUT
Hole Diameter SUPPORTER CHOICE TABLE D 1 1.89 D 2 1.89 D 3 1.58 D 4 1.58
b 1 1.77
b 2 2.36
b 3 2.17
b 4 1.97
b 5 1.58
Hole Pitch
B-103
Made with FlippingBook Digital Proposal Creator