Japan TRIZ symposium in 2013

Research of Development type TRIZ Technique (Part 7)

Case study of technicalcontradiction
Japan VE Association (Kansai Branch, West Japan)
Easy-to-use TRIZ Study Group (former TRIZ Spreading and Utilizing Study Group)
Hisayoshi Tanaka (Shimadzu Corporation), Makoto Unno ( ),Kazuyasu Ikeda (Sekisui Engineering Co Ltd.), et al.

1Case study project members
Project members other than those on cover slide (INPO)
Masayuki Ishii

Toru Kawai (Sharp)(Sumitomo Electric Industries, Ltd.)

Seiya Sato (Dainippon Screen Mfg.)

Hiroshi Oyatani (Mazda)

Naohiko Takayama (Shimadzu Corporation)

Takashi Suzuki (Mazda)

Ryuji Naka

Chiaki Hayashi(Mitsubishi Electric Corporation)(Kawasaki Industries, Ltd.)

Hiromi Fujiwara (Shimadzu Corporation)

Satoshi Hirono (Omron)

Shigeaki Matsui

Toshiaki Masaki (Nitto Denko)(Mitsubishi Electric Corporation)

Shinichi Matsue (West Japan Railway)

Bunta Matsuhana (Shimadzu Corporation)

Manabu Mizobuchi (Panasonic)

Naoshi Yoshida

Etsuo Yamada (Canon Inc.)(Mitsubishi Heavy Industries)

Masayuki Inoguchi (Panasonic)

Takashi Shitaka (Kubota)

Ichiro Inoue (Kyoto Sangyo University)

Hirofumi Sato (Brother Industries, Ltd.)
2Current content of activity
The case study project was done from 2006 to 2011.
①Problem definition
The 1st report②Product analysis
1.Entrance③Analysis why why
The 2nd report④Attribute analysis⑤technical contradiction
2.Individual tool 1⑥Physical contradiction

technicalcontradiction
report omission
The 3rd report

3.Individual tool 2⑦Place material-analysis

The 4th report⑧Law of technologicalsystem evolution

The 5th report⑨SLPThe 6th report3Content of presentation
1.Purport of this report
2.Introduction of "Examination procedure of technicalcontradiction cancellation (idea)"
3.Introduction of outline of case study
4.Reflection of finding obtained by case study
5.Summary41. Main message of this report
The case study project was done during 2006 - 2011.
From 2012, it is examined to maintain it as a guidance usedeasily.
This time, it reports concerning the technical contradiction
omitted in past reports.

5

2. Introduction of "Examination procedure oftechnical contradiction cancellation (idea)""Examination procedure of the technical contradiction cancellation (idea)" obtained from the casestudy project executed in 2006 - fiscal year 2011 is as follows.

Step1: Problem definition
Step2: Product analysis"Problem analysis"
Phase

Step3: Analysis why why
Step4: Attribute analysis"Measures plan"
Phase

Step5: Setting of technicalcontradiction

Step6: Idea creation

This time,It explains around"Step5: the settingof technicalcontradiction".
6

Step5: Setting of technical contradiction

Step5-1: Selection of primary cause
Step5-2: Definition of profitable action
Step5-3: Definition of excessive harmful/shortage/action
Step5-4: The contradiction model's making
Step5-5: Setting of technical contradiction

7

3. Introduction of the outline of the case study"Problem of the inclination of the picture frame" was caught asa theme, it examined according to "Examination procedure of
the technical contradiction cancellation" made with this society,and it verified it concerning this procedure.

8New case: Problem of inclination of picture
frame
WallNail (1)String (1)Hook(2 pieces)

Vibration
The string shifts by
the vibrationtransmitted from thewall.

Picture frame

I want to prevent the picture frame from inclining even if there is a vibration thatexists in standard living conditions. Measures against the inclination of the picture
frame in the environment with an abnormally large vibration that the train passes
immediately side near the construction site are not done this time.
9Step1: Problem definition
1.System namePicture frame set

2.BackgroundThe going string on the nail shifts gradually by the vibration transmitted
from the wall, and the picture frame inclines.

3.Ideal solution

The picture frame doesn't incline even if detaching and the registrationof the picture frame are easy and there is a vibration.

4.The main element that composes
technological system and thefunction

Omission (Refer to the product analysis).

5.Solution problem

It improves it so that the picture frame should not incline even if there
is a vibration that exists without greatly basically changing a present
method in standard living conditions.

6.Limiting condition･Measures against the inclination of the picture frame in theenvironment with an abnormally large vibration that the train passes
immediately side near the construction site are not done this time.
･The string is 1, and both sides are fixed in the hook.
･The string is not wrapped around the nail.
･The bottom of the picture frame has come in contact with the wall.
･Only the roll : the vibration transmitted from the wall.

10

Step2: Product analysis
Nail

It is possible totry to put it.

Weight issupported.

The bear againstby the frictionalforce.

Thevibration
is caused.

It holds.

string is fixed.

The end of aWallThevibration
is caused.

Cause the vibration
Thevibration
is caused.

It maintains it.

The bearagainst by thefrictional force.

Two hooks

Cause the vibration

StringPicture frame (product)11

Step3: “Why why” Analysis
The picture frame inclines.

Center of gravity is not understood easily.
Center of gravity is not matched easily.

When putting it on thewall

Center of gravity doesn't encounter it.

The position in which thestring catches on a nailshifts.

The vibration of the outside is transmitted.

The vibration cannot be absorbed.

After time passes

The string slips.

The frictional force of the picture frame and the wall is weak.
The frictional force of the nail and the string is weak.
The center of gravity of the picture frame has changed.

12Change in product analysis by passage of time
When putting
it on the wallAfter timepasses

13

Step4: Attribute analysis
AttributeThing/that cannot be called
which investigationnecessity

Increase Problem
Relation (bad effect)
AttributeStringNail

A decrease
ProblemRelation (bad effect)
Attribute-Thickness
Elasticity
Flat rate
Transformation

Water permeability
WeightFrictional properties-Thickness
Inclination (installation angle)
Flat rate

Easiness to rust
Frictional properties

14

Step5-1: Selection of primary cause
The picture frame inclines.
Center of gravity doesn't encounter it.

Center of gravity is not understood easily.
Center of gravity is not matched easily.

The position in which the string
catches on a nail shifts.

The string slips.
The vibration of the outside is transmitted.

It examined it by thisthis time.

The vibration cannot be absorbed.
The frictional force of the picture frame and the wall is weak.
The frictional force of the nail and the string is weak.

.

The center of gravity of the picture frame has changed15

Step5-2: Definition of profitable action
Selected primary cause

Primary cause selected fromresult of analysis why why.

Object (The thing that is original of theprimary cause . The attribute is notincluded).

The thing (object) that isoriginal of the selected primarycause is clarified.

Purpose of object (reason wanting it likecurrent state each other)Being acted thing (thing to receiveaction from object)
Action that causes it for thing that it
acts object

Because it is that the reason wanting
it like the current state each other(purpose) is sure to exist, thepurpose is clarified to the object.

When some actions have beencaused for the thing (being actedthing) to achieve the purpose,the object is caught.
16

Step5-2: Definition of profitable action
Selected primary cause

The frictional force of the nail and the string is weak.
Object (The thing that is original of the primary cause . The attribute isnot included).

StringPurpose of object (reason wanting it like current state each other)???
The purpose of the object (string) was
not defined easily.

Being acted thing (thing to receive action from object)

NailAction that causes it for thing that it acts object
17

Consideration concerning reason why purposeof object is not put out easily
Because the action is not correctly expressible by the productanalysis, it is likely not to think easily.
After deciding the object, you should review the productanalysis for the thing and the action of the object
surroundings.

18

Review of product analysis
Nail
It is possible totry to put it.

Weight issupported.

The bear against by
the frictional force.

The
vibration iscaused.

One of "Can start starting"of theThereasons(purpose) tovibration
use thestring. It doesn'tis told.
describe it as an action.

StringThe end of astring is fixed.

It holds.

Thevibration iscaused.

Because the object is a string, you
should think as an action of theobject.

Wall

Two hooks
It maintains it.

Thevibration iscaused.

Picture frame (product)
19

Reviewed product analysis
Nail

Weight istold.

The bear againstby the frictionalforce.

The
vibration iscaused.

Wall
The
vibration iscaused.

It holds.

The end of astring is fixed.

The bearagainst by thefrictional force.

Two hooks

Cause the vibration

StringThevibration iscaused.

It maintains it.

Cause the vibration

Picture frame (product)20

Step5-2: Definition of profitable actionSelected primary cause

The frictional force of the nail and the string is weak.
Object (The thing that is original of the primary cause . The attribute is notincluded).

StringPurpose of object (reason wanting it like current state each other)
Detaching the picture frame is easy and the adjustment of
the inclination is facilitated.
Being acted thing (thing to receive action from object)

NailAction that causes it for thing that it acts object

The weight of the picture frame is told.
21

Rule of drawing
The model expresses the clarification.
 It models because of object (S), being acted thing (O), andaction (V).

 A profitable action is shown by the solid line.
The lack action is shown in the short dashed line.
An excessive action is shown in a double line.
The adverse effect is shown in the wavy line.
22

Step5-2: Definition of profitable action

The purpose: Detaching the picture frame is easy and theadjustment of the inclination is facilitated.
A profitable action: The weight of the picture frame is told.

StringNail23

Step5-3: Definition of harmful/insufficient/excessive actions
Selected primary causeAt each embarrassment that the
selected primary cause causes
Object (The thing that is original of theprimary cause . The attribute is notincluded).
Being acted thing (thing to receive
action from object)
Action that causes it for thing that it
acts object

In general, a high-ranking
factor shows one about the
primary cause selected whenanalyzing it why why at thiseach embarrassment.

"Each embarrassment" that the
selected primary cause causes
is caught when having caused
as a result of causing someactions for the thing that it acts
the object.
24Step5-3: Definition of harmful/insufficient/excessive actions
Selected primary cause
The frictional force of the nail and the string is weak.
At each embarrassment (a ..one.. high-ranking factor of the selected primarycause)

The string slips.
Object (The thing that is original of the primary cause . The attribute is notincluded).

StringBeing acted thing (thing to receive action from object)

NailExcessive harmful/shortage/action that causes it for thing that it acts object

The bear against by the frictional force (lack action).
25

Step5-3: Definition of harmful/insufficient/excessive actions

The result: The string slips.
The lack action: Bear against by the frictional force.
StringNail26

Step5-3: Definition of harmful/insufficient/excessive actions
Action model assumed at first

Purpose:□□□Profitable action：○○○Being acted
thing

ObjectExcessive action：●●●Result：■■■Excessive harmful/shortage/action in problem ofinclination of picture frame

StringThe action model is made from theobject as a model that the being
acted thing and the action work.
(above figure)
However, there is impossibility inthe expression as the action thatworks at one direction to the thingact from the object because thefrictional force is power to work
mutually between two things.
(figure below)

NailThe lack action: Bear against by the frictionalforce.

The way things are going, thecontradiction model cannot bemade. ｡｡

The result: The string slips.
27

Consideration on the model structuring
What is the purpose of structuring the action model?
→Device to make contradiction easy to see.
The model might not have to express contradiction forcibly.
The model was made in the image that pulled out the part(surroundings of the object) that became a focus from theproduct analysis, contradiction was expressed in the wordreferring to this model, and it changed to the method.
The name of the model also changed from "Contradiction
model" to "Action model".
28

Step5-4: Structuring the action model
The purpose: Detaching the picture frame is easy and the adjustment of
the inclination is facilitated.

A profitable action: The weight of the picture frame is told.
StringNail

The lack action: Bear against by the frictional force.
The result: The string slips.
Explanation ≫ of model of record on ≪I have occurred the phenomenon "The string slips" because of "Bear against by
the frictional force" insufficient, and want to prevent this from occurring.
It becomes impossible to achieve the purpose "Detaching the picture frame iseasy and the adjustment of the inclination is facilitated" though it only has tofix the string to the nail and to prevent the position of the string and the nailfrom shifting for that.
29Step5-5: Setting of technical contradictions
The improved characteristic and the deteriorating characteristic are defined.
I have occurred the phenomenon "The string slips" because of "Bear againstby the frictional force" insufficient, and want to prevent this from occurring.
It becomes impossible to achieve the purpose "Detaching the picture frame iseasy and the adjustment of the inclination is facilitated" though it only has tofix the string to the nail and to prevent the position of the string and the nailfrom shifting for that.
The improved characteristic and the deteriorating
characteristic are chosen referring to the above-mentionedsentences.

Improvedcharacteristic

Power (power to fix position of string and nail)

Deteriorating
characteristic

Easiness of operation (easiness of detaching andregistration of picture frame to do)30

4. Reflection of findings obtained by the case study
The procedure of "Step5: the setting of technicalcontradiction" was changed as follows.
Step5-1: Selection of primary cause
Step5-2: Review of product analysis

It newly adds it.

Step5-3: Definition of profitable action
Step5-4: Definition of excessive harmful/shortage/action
Step5-5: The action model's making"Contradiction model"
is changed to "Actionmodel".

Step5-6: Setting of technical contradiction31

5. Summary: Result of the case study
The following result was achieved as a result of doing the case study
concerning technical contradiction that assumed "Problem of theinclination of the picture frame" to be a theme.
When you set technical contradiction
1.Necessity and the method of reviewing product analysis
2.Method of making more logical "Action model"[Ni] was concerned, and the new insight was able to be obtained.
When the product was analyzed, awareness with an importantconsideration analysis of the time passage was obtained.
The above-mentioned finding was reflected in "Examination procedureof the technical contradiction cancellation", and this examination
procedure was able to be made a refinement.
32

Thank you for your attention

ＥＮＤ

33