ISO 3047:1982 シネマトグラフィー—スプール、昼光負荷タイプ、35 mm映画用カメラ用（容量30 m-100フィート）—寸法 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing International Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council.

International Standard ISO 3047 was developed by Technical Committee ISO/TC 36, Cinematography.

This second edition was submitted directly to the ISO Council, in accordance with clause 5.10.1 of part 1 of the Directives for the technical work of ISO. It cancels and replaces the first edition (i.e. ISO 3047-1975), which had been approved by the member bodies of the following countries:

The member body of the following country had expressed disapproval of the document on technical grounds:

United Kingdom

1 Scope and field of application

This International Standard specifies the dimensions and characteristics of the general purpose daylight loading spool with a nominal capacity of 30 m (100 ft) for use in 35 mm motion-picture cameras.

2 References

3 Dimensions

3.1 The dimensions shall be as shown in the figures and given in the table.

3.2 If the rivet heads or other fastening devices extend beyond the outer surface of the flange, they shall lie outside the K diameter area, but within the boundaries defined by the volume of rotation diagram.

3.3 Dimension F represents a slot in the spool core for attaching film. The slot sides, starting immediately adjacent to each flange and running a minimum distance of 6,0 mm (0.24 in) from each flange toward the other, should be straight, parallel, and 0,7 to 1,5 mm (0.03 to 0.06 in) apart. The slot sides may diverge over the remaining (central) portions of the slot.

3.4 Dimension J represents the thickness or effective thickness respectively of the spool within a K diameter area which is centred on the spindle hole axis of each flange.

3.5 A reference plane of rotation for each flange is defined by a plane perpendicular to the axis of the spindle and coincident with the surface of a flat 15,0 mm (0.59 in) diameter support which is in contact with the flange and centred on the spindle hole axis of the flange.

The dimension P is the distance measured outwardly from this reference plane ²⁾ of rotation to the plane of rotation generated by the thickest and/or most eccentric point on the flange outside the K diameter area when the spool is rotated on an accurate, tight-fitting spindle. This includes rivets or other fastening devices, variations in flange thickness, flatness and lateral runout of the flanges.

Selection of dimension P value is dependent upon the thickness of the material used for the flanges. According to the flange material thickness:

• a) the K diameter area may be depressed (with P greater than zero); or
• b) the outside surfaces of the flanges may be flat from spindle hole to periphery (with P equal to zero); or
• c) in the case of flanges made of very thin material, the K diameter area may be raised rather than recessed (effectively, P less than zero).

3.6 The maximum effective thickness of spools (including all the characteristics mentioned in 3.5) outside the K diameter area has not been stated because it is a function of a spool’s specific J value between the 15,0 mm (0.59 in) diameter reference zones on each flange. The largest such overall effective thickness, however, will be J_max + 2P_max = 38,90 mm (1.530 in).

3.7 The eccentricity of the core with respect to the spindle hole axis, Z, should not exceed a total radius variation (total indicator reading) of 1,0 mm (0.04 in) for all spool sizes.

Figure 1 — Flange No. 1 (that which first engages the camera spindle)

Table

Dimension	mm	in
A	7,6	0,30
B	3,1	0,12
C	8,05	0,317
D	5,40 min.	0.213 min.
E	32,0 ± 0,5	1.26 ± 0.02
F	0,7	0,03
H1	35,10	1,382
H2	35,00 min.	1.378 min.
J	37,9	1,49
K	25,5 min. 1)	1.00 min.
M	92,0	3,62
P (see 3.5)	0,50 max.	0.020 max.
U	8,15 ± 0,15	0.321 ± 0.006
V	11,2	0,44

Figure 2 — Volume of rotation diagram

Figure 3 — Spindle and drive holes in flange No. 1 (see 4.2.3)

Figure 4 — Optional spindle hole - Types in flange No. 2 (see 4.2)