ISO 5353 pdf download.Earth-moving machinery, and tractors and machinery for agriculture and forestry – Seat index point
1 Scope
This International Standard specifies a method and the device for use in determining the position of the seat index point (SIP) for any kind of seat designed for earth-moving machinery as defined in IS0 61 65, and tractors and machinery for agriculture and forestry as defined in IS0 3339-O. This provides a uniform method for defining the lo- cation of the SIP in relation to a fixing point on the seat. The SIP may be determined on a seat by itself or with the seat located in its operating environment on the machine. The SIP is a characteristic of the seat; therefore, it may be specified by the seat manufac- turer.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 3339-0.1 986, Tractors and machinery for agricul- ture and forestry – Classification and terminology – Part 0. Classification system and classification. IS0 61 65:1 987, Earth-moving machinery – Basic types – Vocabulary.
3 Definitions
For the purposes of this International Standard, the following definitions apply. 3.1 seat index point; (SIP): Point on the central vertical plane of the seat as determined by the device shown in figure 1 , when installed in the seat as specified in 5.3. NOTES 1 The SIP is fixed with respect to the machine and does not move with the seat through its adjustment and/or os- cillation range 2 The SIP as established and defined by this International Standard may be considered, for operator work-place design purposes, to be equivalent to the intersection on the central vertical plane through the seat centreline of the theoretical pivot axis between a human torso and thighs 3.2 fixing point: Point specified by the manufac- turer to which the SIP is referenced. See figures 2 and 3 for examples.
4 Multiple machine function seats
Some seats are designed to locate and fix an operator to perform more than one function with a given ma- chine. Where a second position of the seat is provided because the machine or tractor has a second set of controls, the SIP of the seat has two locations relative to the machine or tractor, one for each position, as if there were two seats in the machine or tractor. The first location of the SIP shall be used for those Inter- national Standards appropriate to the first location and set of controls and the second location of the SIP shall be used for those International Standards appropriate to the second location and set of controls.
5.1 Device for seat index point (SIP) determination The device for determining the SIP shall comply with figurel. The mass of the device shall be 6 kg k 1 kg. The work surfaces of the device shall be of hardwood (sanded with 200 or finer grit paper or equivalent and polished) or equivalent material with the same performance to provide minimum friction with the muslin cloth in 5.3.1 . 5.2 Adjustments when determining the seat index point (SIP) When the relevant adjustments are a part of the seat and its suspension, the seat shall be adjusted ac- cording to the following sequential steps before de- termining the SIP.