Corelation between Lumbar Spine...Background ・Requirement by a Drawing Hardness：75-85（Shore...

Ｃｏｒｅｌａｔｉｏｎｂｅｔｗｅｅｎ Lumbar Spine Ｈａｒｄｎｅｓｓ

and Chest Deflexion Characteristics

ＩＳＯ/ＴＣ22/ＳＣ12/ＷＧ5

2012/5/31

JASTI Co., Ltd.

Background

・Requirement by a Drawing

Hardness：75-85（Shore A）、 Angle：45.5°± 0.5°

Cable torque：1.1-1.4 N・m by User manual

→50th dummy Lumbar Spine is requested by Torso Flexion test

→Lumbar Spine Hardness is to support Upper torso and influence to Chest defluxion result.

＊Remarks: 5F Torso Flexion test

Multi-factors （Abdominal、Chest Jacket、Pelvis, Lumbar Spine.）

→Lumbar spine test is useful for evaluations

2012/5/31

2 ISO/TC22/SC/12/WG5 Kyoto

Quality control ①Production

・Rubber mold：

→No ｗeld problem, or

No sand blasted surface

②Static load test

・Bonded strength: 240kg

Metal – Rubber bonded

・Recovery performance

In 30min→Specification：

45.5°+/- 0.5°

2012/5/31


Test method ・Pelvic Adaptor+ Lumbar Spine +

Spine Box attachment

・Cable torque：1.25 N・m

・Spine Box attachment ：7.16kg

・Loaded radius： 584mm * Top of Pelvic Adaptor center～Neck Bracket

・Initial angle：13° *Angle at top of Spine Box attachment

・Pull Angle：30° *Top center of Pelvic Adaptor～Pull point

・ Cable to table angle at 59° at pull angle as 30°

5

Cable Torque

No. Test No Torque Bending Angle/°

Hardness 10 20 30

1 1 1.1N 0 92.77 147.13 236.02 80

2 2 1.1N 0 91.59 147.11 232.38 80

3 3 1.1N 0 91.54 145.22 230.08 80

4 4 1.1N 0 90.91 145.68 235.39 80

5 Aver. 1.1N 0 91.70 146.29 233.47 80

6 6 1.25N 0 96.28 153.63 237.81 80

7 7 1.25N 0 99.05 150.75 241.12 80

8 8 1.25N 0 97.62 152.83 227.91 80

9 9 1.25N 0 96.44 152.61 238.22 80

10 Aver. 1.25N 0 97.35 152.46 236.27 80

11 11 1.4N 0 97.07 154.42 249.49 80

12 12 1.4N 0 100.39 155.38 248.38 80

13 13 1.4N 0 100.39 163.36 248.52 80

14 14 1.4N 0 100.71 157.45 246.41 80

15 Aver. 1.4N 0 99.64 157.65 248.20 80

2012/5/31

ISO/TC22/SC/12/WG5 Kyoto

6

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2012/5/31

ISO/TC22/SC/12/WG5 Kyoto

2012/5/31


BendingTest Result by Hardness

0 10 20 301 1 1.25N 0 120.27 185.37 299.26 852 2 1.25N 0 120.10 191.02 308.22 853 3 1.25N 0 118.13 188.74 309.46 854 9 1.25N 0 109.85 176.47 270.85 835 10 1.25N 0 114.87 173.20 262.24 836 4 1.25N 0 96.28 153.63 237.81 807 5 1.25N 0 99.05 150.75 241.12 808 6 1.25N 0 97.62 152.83 227.91 809 8 1.25N 0 96.44 152.61 238.22 80

10 11 1.25N 0 92.12 151.35 239.92 8011 7 1.25N 0 72.65 118.44 193.95 7512 12 1.25N 0 71.92 118.10 191.55 7513 14 1.25N 0 72.05 117.20 194.11 75

Hardness

Hardness difference

No. Test No. TorqueBending Angle (Deg)

Bending Test Resulted by Various Hardness

0

50

100

150

200

250

300

350

0 5 10 15 20 25 30 35

85°_A

85°_B

85°_C

83°_A

83°_B

80°_A

80°_B

80°_C

80°_D

80°_E

75°_A

75°_B

75°_C

0

100

200

300

400

500

600

0 10 20 30 40 50 60 70

Max

. Im

pac

t Fo

rce

/ d

aN

Max. Deflexion / mm

Chest Impact Test

2012/5/31


Chest Impact test result 1 (By Lumbar Surface Shore A)

Max.Deflexion Hysterics Max. Force Probe Speed1 415 1.25 68.40 72.46 540.09 6.71 752 415 1.25 69.35 71.83 552.96 6.62 753 415 1.25 68.91 72.14 547.18 6.67 75

68.89 72.14 546.74 6.67 75


70.82 71.54 555.60 6.68 80


71.57 71.24 562.99 6.71 85

Hardness

平均

No. Test No. Torque

No. Test No. Torque

Hardness

平均

Hardness

平均

No. Test No. Torque

Chest Impact test result 2 (Chest Deflexion result)

75 80 851 68.40 71.82 71.452 69.35 70.71 71.563 68.91 69.94 71.70

Aver. 68.89 70.82 71.57

75 80 851 72.46 71.00 71.002 71.83 71.06 71.533 72.14 72.57 71.20

Aver. 72.14 71.54 71.24

75 80 85

1 540.09 558.79 562.42

2 552.96 555.82 563.353 547.18 552.19 563.21

Aver. 546.74 555.60 562.99

Test NoMax. Impact Force

Max. Chest Deflexion

Test No.Histrycs

Test No.


Test result 1

Hardness vs Chest Deflexion

R2 = 0.9385

65

67

69

71

73

75

75 80 85

Hardness

Max.D

eflexio

n

2012/5/31

Test Result 2

R2 = 0.9973

520

530

540

550

560

570

580

75 80 85

Hardness

Max.I

mapc

t F

orc

e/d

aN

Hardness vs Max. Impact Force

Test Result 3

Hardness vs Hysterics

R2 = 0.9643

65

67

69

71

73

75

75 80 85

Hardness

Hys

teri

cs/%

Result Summary

• Resulted by Lumbar Spine Hardness

• Test Shore A 75 ～85

Average of : 75 --- 85

Max. Chest deflection : 68.89 ～ 71.57mm

Hysterics : 72.14 ～ 71.24%

Max. Impact Force : 546.74 ～ 562.99N

Conclusion 1 ①.Different surface hardness influence on Torso Foreword / Rearward movement

⇒Harder Lumber spine keep Upper Torso in the original position, the impact force energy transferred more to Rib deflexion.

②.Hybrid-Ⅲ50th Lumbar Spine Required performance should be confirmed by the Bending hardness by Torso Flexion Test.

Conclusion 2 ・Current checking points:

Ｄｒａｗｉｎｇ specifications＝Surface hardness ;

Shore A 75°to 85°

・Standard ｐｒｏｄｕｃｔｉｏｎｒｅｑｕｅｓｔ； Shore A 80+/-1°

OR

・ＮｅｗＬｕｍｂａｒｓｐｉｎｅｐｒｏｄｕｃｔｉｏｎ corridor；

(Lumbar Spine Shore A 80+/-2°）

+10°： 86～106 N +20°：138～167 N +30°：220～267 N

0

50

100

150

200

250

300

350

0 5 10 15 20 25 30 35

85°_A

85°_B

85°_C

83°_A

83°_B

80°_A

80°_B

80°_C

80°_D

80°_E

75°_A

75°_B

75°_C

upper limit

lower limit

New Reccomendable Corridor

Further Study Ｔａｒｇｅｔ We continue ｍｏｒｅ Torso flexion test with Lumbar Spine Shore A 80+/-1 (or new corridor ) . We use Lumbar Spine ,Shore A 80+/-1 hardness for developing new Rib Dumping material.

By our Torso bending test for deterｍ in a reasonable corridor (bending force/angle) based on Shore A 80+/-2, as a next stage with Shore A 80+/-1. as well as Torso Flexion test as 5F.

Thank You

.

2012/5/31 ISO/TC22/SC/12/WG5 Kyoto

21

Corelation between Lumbar Spine...Background ・Requirement by a Drawing Hardness：75-85（Shore...

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