Seesaws Flashcards
What are the different types of seesaws
Axel, Single point or rocking, Multi point or multi rock, Rocking seesaw like a horse Sweeping seesaw like a rocktapus Overhead single axis like a scale swing.
FHF for each type of seesaw
Axel 1.5m Single 1m Multi 1m Rocking 1m Sweeping 2m Overhead 2m
What is the GC required for each type of seesaw?
230MM EXCEPT on springs or there is damping, or mainly horizontal movement.
What is damping
combined effect of the supporting component(s) that moderates the speed at which the equipment can move and the reduction of shock effects at the outer positions of the equipment
When do foot rests need to be provided.
when the ground clearance is less than 230 mm and the structure is not damped.
What probe is often used on seesaws foot or hand rests?
When tested in accordance with Annex E, no part of the foot rest shall project beyond the outer face of the gauge.
Are foot rests allowed to rotate?
no.
Are foot rests allowed to rotate?
no.
Do hand holds need to be provided?
Yes, and must not rotate.
Do hand supports conform to grip or grasp?
Grip 14-16mm?? Check this measurement. EN 1176-1:2008, 4.2.4.6.
Those parts of the side profile, which may give an impact on children passing by or on the user shall not have projections with a radius of less than
20 mm
When tested in accordance with Annex C (check what this is) , the supporting component shall not compress by more how much?
more than 5 % and it shall be possible to insert the 12 mm diameter rod at all extreme positions. (that the fat chain probe)
For equipment Types 1, 2, 3 and 4, when measured from the perimeter of the equipment in its most extreme positions the falling space shall be a minimum of
1 000 mm
For equipment Types 5 (octopus) and 6 scale swing, the requirements for the impact and falling space shall be in accordance with
For equipment Types 5 and 6, the requirements for the impact and falling space shall be in accordance with EN 1176-1:2008, 4.2.8.2.4. and 4.2.8.2.5.
x = 2/3 y + 0,5
Axel SS - what is the max lateral deviation and at what distance is it measured?
When measured at a distance of 2 000 mm from the axis point, and tested in accordance with Annex D, the lateral deviation shall not be greater than 140 mm (Check annex D)
What is the total range of movement permitted on a rocking seesaw (Type 4).
600 mm.
What it the max FHF for an overhead single axis seesaw (scale swing) (type 6)
2 000 mm, when measured when measured 20 deg out from the vertical (centre of the swing seat).
What is the free space required for a scale swing (type 6).
Depends on height of seat.
How do you measure for seat slope? THIS ISTOO HARD< NEED TO GOV OVER.
SEAT SLOPE FOR AXEL AND ROCKING HORSE IS 20 DEG, 30 DEG FOR SPRINGY AND SCALE AND ROCTOPUS DON’T HAVE A SEAT SLOPE CONCERN.
DON’T HAVE DEVICE TO APPLY FORCE. FIND OUT WHADT THIS WOULD BE?. B.2.1 Device, capable of applying a force in accordance with EN 1176-1:2008, Table A.1.
B.2.2 Device for Type 2B, capable of applying a force of (167 ± 2,1) N for age group 0 to 4 years and/or a
force of (279 ± 5) N for age group 0 to 8 years.
B.3 Procedure
Load the seat/stand in its equilibrium position, in each user position, with 69.5KG
Incline the loaded seat/stand to the maximum specified seat/stand angle (20 DEG ON AXEL SS), and release the seat/stand. IF THE SEAT MOVES TO THE GROUND IT FAILS (I.E. PAST THE 20 DEG)
B.3.2 For Type 2B, apply the force in accordance with B.2.2.
Determination of freedom from pinch and crush points - what finger rod do you use, and how. NEED TO DO MORE ON THIS AND FIGURE IT OUT.
Determination of freedom from pinch and crush points
C.1 Principle
The support components are loaded with a known force and the compression at the support components is measured. The equipment is moved to its extreme positions and the support components and surround part of the equipment are tested to establish whether a 12 mm diameter rod can be inserted during the course of movement.
C.2 Apparatus
C.2.1 Device, capable of applying a force of 695 N ± 5 N vertically in the centre line of each seat/standing
surface.
C.2.2 Device for Type 2B (MULTI PIVOT SPRING), capable of applying a force of (167 ± 2,1) N for age group 0 to 4 years and/or a force of (279 ± 5) N for age group 0 to 8 years.
C.2.3 Rod, of 12 mm diameter. (THE ONE ON THE CHAIN PROBLE
C.3 Procedure
C.3.1 Load the equipment with a force at 695 N ± 5 N (C.2.1) and record whether the supporting component compresses by more than 5 %. For Type 2B, apply the force in accordance with C.2.2 selecting the age group that represents the worst case foreseeable use.
C.3.2 Move the equipment to one of its most extreme positions. Using the rod (C.2.3) examine the support- ing component and the surrounding area to check whether the rod can be inserted.
Repeat the procedure at all of the other extreme positions. Record whether the rod could be inserted at all extreme positions.
What is damping for?
to avoid sudden stop or sudden reversal of the motion. To reduce the risk of spinal injuries due to sudden shock load,
When do foot rests need to be a part of the seesaw?
when both of the following apply:
the ground clearance is less than 230 mm AND the structure is not damped.
What probe is used on the foot peg?
Ring gauge. It must not pass over.
Do hand supports always need to be provided?
Yes
Are hand supports allowed to rotate?
No
What is shall the diameter of hand supports be?
Grip 16-45mm
For seesaws for toddlers what is the recommend max grip?
30 mm
What probe is used on the handles?
Ring gauge - no part should project past the outer face of the gauge.
For kompan creature type springier etc that have a side profile what should the radius be and why?
radius of less than 20 mm
Changes in the shape of the edge of the front and the back of parts, projecting from the principal profile, shall be rounded with a radius of at least 20 mm to stop kids getting poked by them when passing by.
What is the min ground clearance?
230 mm
Other than ground clearance how else can you avoid entrapments in seesaws?
b) use of damping effects; or
c) deflecting effects from the construction of the equipment.
For rocking horses what should you look for in design to avoid hurting kids
deflecting effects and can deflect passing children from the equipment.
When you compress a springy how much can the spring compress? and what probe do you use /how
When tested in accordance with Annex C, the supporting component shall not compress by more than 5 % and it shall be possible to insert the 12 mm diameter rod at all extreme positions.
What is the min falling space for a seesaw
minimum of 1 000 mm (doesn’t include octopus or scale).
How do you check a springy for finger entrapment?
C.3.2 Move the equipment to one of its most extreme positions. Using the rod (C.2.3) examine the support- ing component and the surrounding area to check whether the rod can be inserted.
What does an Annual Inspector look for and what is the purpose of the inspection.
overall level of safety of equipment,
foundations and surfaces,
any changes made
effects of weather,
presence of rotting or corrosion,
and any change in the level of safety of the equipment as a result of repairs made, or of added or replaced compo- nents.
Special attention should be given to ‘sealed-for-life’ parts.
