JP2503298B2 - Developer fluidity test method and test apparatus - Google Patents

Developer fluidity test method and test apparatus

Info

Publication number
JP2503298B2
JP2503298B2 JP2237777A JP23777790A JP2503298B2 JP 2503298 B2 JP2503298 B2 JP 2503298B2 JP 2237777 A JP2237777 A JP 2237777A JP 23777790 A JP23777790 A JP 23777790A JP 2503298 B2 JP2503298 B2 JP 2503298B2
Authority
JP
Japan
Prior art keywords
developer
inclination angle
mounting table
fluidity
flows out
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2237777A
Other languages
Japanese (ja)
Other versions
JPH04116449A (en
Inventor
和正 市位
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2237777A priority Critical patent/JP2503298B2/en
Publication of JPH04116449A publication Critical patent/JPH04116449A/en
Application granted granted Critical
Publication of JP2503298B2 publication Critical patent/JP2503298B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 〔概要〕 電子写真式プリンタや電子複写機などに用いる現像剤
の流動性試験方法及び試験装置に関し、 現像剤載置台を用い、その傾斜面に現像剤を載置して
滑らせ、現像剤の流動性を現像剤載置台の傾斜角度で評
価することを目的とし、 水平位置から傾斜可能に設置した現像剤載置台に試験
すべき所定量の現像剤を載置して徐々に傾斜させ、現像
剤の流れ出す傾斜角度と流れ終わる傾斜角度とで流動性
を判定するように構成する。
The present invention relates to a developer fluidity test method and a test device used in an electrophotographic printer, an electronic copying machine, etc., in which a developer mounting table is used and the developer is mounted on an inclined surface thereof. Slide the sample on the developer mounting table to evaluate the fluidity of the developer based on the inclination angle of the developer mounting table, and place a predetermined amount of the developer to be tested on the developer mounting table that can be tilted from the horizontal position. And is gradually inclined, and the fluidity is determined by the inclination angle at which the developer flows out and the inclination angle at which the developer ends.

〔産業上の利用分野〕[Industrial applications]

本発明は電子写真プリンタや電子複写機などに用いる
現像剤の流動性試験方法及び試験装置に関する。
The present invention relates to a developer fluidity testing method and testing apparatus used in an electrophotographic printer, an electronic copying machine, or the like.

電子写真式プリンタや電子複写機などにおいて、感光
体上の潜像を可視像化するのに用いるトナーあるいはト
ナーとキャリアとの混合物である現像剤は摩擦帯電させ
るため現像器内で攪拌するが、現像剤の流動性が悪く攪
拌むらがあると帯電量が低下したり帯電むらが生じるた
め、一定限度以上の流動性をもった現像剤を用いる必要
がある。そのため、砂時計式に現像剤を落下させ、その
落下時間を計時する流動性試験装置を用いて現像剤の流
動性をチェックしている。
In an electrophotographic printer, an electronic copying machine, etc., a developer used as a toner or a mixture of a toner and a carrier for visualizing a latent image on a photoconductor is agitated in a developing device because it is frictionally charged. However, if the developer has poor fluidity and there is uneven stirring, the amount of charge is reduced or uneven charging occurs. Therefore, it is necessary to use a developer having fluidity above a certain limit. Therefore, the flowability of the developer is checked using a fluidity test device that drops the developer in an hourglass manner and measures the fall time.

ところが、吸湿した現像剤では途中で落下しにくくな
って正確に落下時間を計時できない問題があり、他の流
動性試験方法による装置が要望されている。
However, a developer that has absorbed moisture has a problem that it is difficult to fall on the way and the fall time cannot be accurately measured. Therefore, an apparatus based on another fluidity test method is desired.

〔従来の技術〕[Conventional technology]

従来の流動性試験方法及び試験装置は第4図の側断面
図に示すように漏斗11を用いる。漏斗11に一定量、100g
rの現像剤12を入れ、先端から自重によって垂れ流しそ
の落下時間を計時する構成とし、落下時間が規定時間内
にあるものを良品と判定している。
The conventional fluidity test method and test apparatus use a funnel 11 as shown in the side sectional view of FIG. Fixed amount in funnel 11, 100g
The developer 12 of r is put therein, and the developer is allowed to flow down from its tip by its own weight and the fall time is measured, and the product whose fall time is within the specified time is judged as a good product.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

しかしながら、このような上記落下時間を計時する方
法によれば、第5図の側断面図に示すように現像剤12が
吸湿していると、現像剤12の漏斗11内での流れが悪くな
り途中で止まって落下せず、正確に落下時間を計時でき
ないといった問題があった。
However, according to such a method of measuring the fall time, when the developer 12 absorbs moisture as shown in the side sectional view of FIG. 5, the flow of the developer 12 in the funnel 11 becomes poor. There was a problem that it did not stop in the middle and did not fall, and it was not possible to accurately measure the fall time.

上記問題点に鑑み、本発明は現像剤載置台を用い、そ
の傾斜面に現像剤を載置して滑らせ、現像剤の流動性を
現像剤載置台の傾斜角度で評価することのできる現像剤
の流動性試験方法及び試験装置を提供することを目的と
する。
In view of the above-mentioned problems, the present invention uses a developer mounting table, and the developer is mounted on the inclined surface and slid, and the fluidity of the developer can be evaluated by the inclination angle of the developer mounting table. An object of the present invention is to provide a method for testing the fluidity of an agent and a testing device.

〔課題を解決するための手段〕[Means for solving the problem]

上記目的を達成するために、本発明の現像剤の流動性
試験方法及び試験装置においては、水平位置から傾斜可
能に設置した現像剤載置台に試験すべき所定量の現像剤
を載置して徐々に傾斜させ、現像剤の流れ出す傾斜角度
と流れ終わる傾斜角度とで流動性を判定するように構成
する。
In order to achieve the above object, in the developer fluidity testing method and the testing device of the present invention, a predetermined amount of the developer to be tested is mounted on a developer mounting table installed so as to be tiltable from a horizontal position. It is configured to be gradually inclined, and the fluidity is determined by the inclination angle at which the developer flows out and the inclination angle at which the developer ends.

〔作用〕[Action]

現像剤載置台を水平状態から傾斜可能に載置すること
により、現像剤を現像剤載置台に載置すると現像剤には
重力のみが作用し開放状態にあるため、現像剤同士の相
互摩擦の影響が少なくなって傾斜面を自然の形で滑り流
れ易くなる。その流れ出す傾斜角度θ及び流れ終わる
傾斜角度θと現像剤の吸湿度(一定量の乾燥した現像
剤100grを長時間、ある湿度環境に放置した後の含有水
分量grで示す)との相関関係は第6図の含有水分量/傾
斜角度の曲線図で表される。図から分かるように、現像
剤の流動性は、吸湿度の差異によって左右される。現像
剤載置台の傾斜に従って吸湿度の小さい部分は傾斜角度
θで流れ始め、吸湿度のそれより大きい部分は流れず
に残る。そこで、さらに傾斜角度θまで傾斜させて流
れてしまえば使用可能と判定する。即ち、現像剤の許容
吸湿度を載置台の傾斜角度θ、θにおき替えること
ができるため、現像剤の流れ出す傾斜角度と流れ終わる
傾斜角度とを計測することによって現像剤の流動性の良
否を判定評価することができる。
By mounting the developer mounting table so that it can be tilted from the horizontal state, when the developer is mounted on the developer mounting table, only gravity acts on the developer and the developer is in an open state. The influence is reduced, and it becomes easier for the inclined surface to flow smoothly. Correlation between the inclination angle θ 1 that flows out and the inclination angle θ 2 that ends the flow and the moisture absorption of the developer (indicated by the water content gr after leaving a certain amount of dry developer 100 gr in a certain humidity environment for a long time) The relationship is represented by the curve diagram of water content / tilt angle in FIG. As can be seen from the figure, the fluidity of the developer depends on the difference in moisture absorption. According to the inclination of the developer mounting table, a portion having a small moisture absorption starts flowing at the inclination angle θ 1 , and a portion having a larger moisture absorption remains without flowing. Therefore, if the flow is further inclined to the inclination angle θ 2, it is determined to be usable. That is, since the allowable moisture absorption of the developer can be replaced by the inclination angles θ 1 and θ 2 of the mounting table, the developer flowability can be determined by measuring the inclination angle at which the developer flows out and the inclination angle at which the developer ends. The quality can be judged and evaluated.

〔実施例〕〔Example〕

以下図面に示した実施例に基づいて本発明の要旨を詳
細に説明する。
Hereinafter, the gist of the present invention will be described in detail based on the embodiments shown in the drawings.

現像剤の流動性試験方法及び試験装置は第1図の斜視
図に示すように、基台1に平滑な面を有し現像剤が摩擦
帯電しない例えば、ステンレス板などからなる現像剤載
置台2を用い、その一端をヒンジ3で回動自在に枢着し
構成する。
As shown in the perspective view of FIG. 1, the developer fluidity testing method and testing apparatus are such that a developer mounting base 2 made of, for example, a stainless steel plate or the like has a smooth surface on a base 1 and the developer is not triboelectrically charged. , And one end thereof is rotatably pivoted by a hinge 3.

図示するように、現像剤載置台2はヒンジ3を支点に
水平位置から矢印方向に回動傾斜する。現像剤載置台2
上には一定量、例えば100grの現像剤5を一定形状に入
れて載置するための底無しの枠形枡4を置く。
As shown in the figure, the developer mounting table 2 is pivotally tilted in the arrow direction from the horizontal position with the hinge 3 as a fulcrum. Developer mounting table 2
On the top, there is placed a bottomless frame 4 for placing a fixed amount, for example, 100 gr of the developer 5 in a fixed shape.

この流動性試験装置を用いて現像剤の流動性を試験す
るには、現像剤載置台2を水平状態にし、枠形枡4に現
像剤5を入れる。そうして、枠形枡4を静かに持ち上げ
取り除き現像剤5を開放した後(現像剤5は一旦、枠形
枡4に入れることにより周囲は崩れるが山形、略一定形
状に載せることができる)、現像剤載置台2をヒンジ3
を支点に徐々に傾けていく。傾斜角度θを変化させ、第
2図の一部破断を含む側面図に示すように載置した現像
剤5の流れ出す傾斜角度θと、第3図の一部破断を含
む側面図に示すように流れ終わる傾斜角度θとを視認
する。現像剤5は第2図の状態で一旦、流れ出すが、流
れ終わらずに途中で止まる。その時、傾斜角度を増して
は流すを繰り返し最後の角度を流れ終わる傾斜角度θ
とする。
To test the fluidity of the developer using this fluidity test device, the developer mounting table 2 is placed in a horizontal state, and the developer 5 is placed in the frame-shaped box 4. Then, after gently lifting the frame-shaped box 4 and removing the developer 5, the developer 5 can be placed in a chevron shape or a substantially constant shape although the periphery is collapsed by putting it in the frame-shaped box 4 once. , Developer holder 2 with hinge 3
Gradually tilt with the fulcrum as the fulcrum. When the inclination angle θ is changed, the inclination angle θ 1 at which the placed developer 5 flows out as shown in the side view including partial breakage in FIG. 2 and the side view including partial breakage in FIG. 3 are shown. The inclination angle θ 2 at which the flow ends is visually confirmed. The developer 5 flows out once in the state shown in FIG. 2, but stops in the middle without ending the flow. At that time, the tilt angle θ 2
And

傾斜角度θ、θは図示するように例えば、デジタ
ル表示角度計6を現像剤載置台2の一端に載せておくこ
とにより、簡単に直読することができる。
The tilt angles θ 1 and θ 2 can be easily read directly by, for example, placing a digital display angle meter 6 on one end of the developer mounting table 2 as shown in the drawing.

現像剤の流れ出す傾斜角度θと流れ終わる傾斜角度
θは第6図に示したようにそれぞれ現像剤の吸湿度と
流動性とは相関関係があって流動性、即ち吸湿度は傾斜
角度におき替えできることから一定基準以下(ある現像
剤においてはθ≦15°、θ≦30°を基準にしてい
る)の傾斜角度の現像剤を良品として判定評価すること
ができる。試験試料の吸湿度の小さい部分は傾斜角度θ
で流れ始め、吸湿度のそれより大きい部分は流れずに
残る。そこで、さらに傾斜角度θまで傾斜させて流れ
てしまえば使用可能と判定する。もちろん、傾斜角度θ
ですべてが流れてしまえば判定良とするが、傾斜角度
θから流れを監視して或る程度湿った部分があって流
れずに残れば、傾斜角度θまで傾斜させて最終判定を
行う。
As shown in FIG. 6, the inclination angle θ 1 at which the developer flows out and the inclination angle θ 2 at which the developer ends are correlated with the moisture absorption and the fluidity of the developer, respectively. Since they can be exchanged, it is possible to judge and evaluate a developer having a tilt angle of a certain standard or less (based on θ 1 ≦ 15 ° and θ 2 ≦ 30 ° for a certain developer) as a non-defective product. The angle of inclination θ
The flow starts at 1 , and the larger part of the moisture absorption remains unflowed. Therefore, if the flow is further inclined to the inclination angle θ 2, it is determined to be usable. Of course, the tilt angle θ
If everything flows in 1 , the flow is judged to be good, but if the flow is monitored from the tilt angle θ 1 and there is a part that is moist and there is no flow, the tilt angle θ 2 is tilted until the final judgment. To do.

このように、一端を支点に水平位置から回動傾斜する
現像剤載置台を基台に枢着し構成することにより、現像
剤は現像剤載置台に開放状態で一定形状に載置すること
ができるため現像剤同士の相互摩擦を最小にして傾斜面
を安定に滑らせることができる。また、現像剤載置台の
傾斜角度は現像剤の流動性を左右する吸湿度と密接な関
係があることから傾斜角度を計測することによって流動
性を評価することができる。その傾斜角度は現像剤載置
台に一緒に載せたデジタル表示角度計で即座、簡便に視
認することができる。
In this way, by constructing the developer mounting table that pivots and inclines from the horizontal position with one end as a fulcrum to the base, the developer can be mounted on the developer mounting table in a fixed shape in an open state. Therefore, the mutual friction between the developers can be minimized and the inclined surface can be slid stably. Further, since the inclination angle of the developer mounting table is closely related to the moisture absorption that affects the fluidity of the developer, the fluidity can be evaluated by measuring the inclination angle. The tilt angle can be visually recognized immediately and easily with a digital display goniometer mounted together on the developer mounting table.

この流動性試験装置の構成は、吸湿した現像剤では途
中で落下しにくくなって落下時間が計時できない従来の
砂時計式の漏斗構成に比べ、現像剤の流動性を簡便に良
否判定することができる。
The structure of this fluidity test device makes it possible to easily judge the flowability of the developer, as compared with the conventional hourglass-type funnel structure in which the moisture-absorbed developer is less likely to fall in the middle and the fall time cannot be measured. .

〔発明の効果〕〔The invention's effect〕

以上、詳述したように本発明によれば、現像剤載置台
の傾斜角度で現像剤の流動性を評価することができるた
め、吸湿した現像剤でも簡便に流動性の評価が可能とな
り、流動性の良好な現像剤を供給することで帯電量を均
一にすることができるといった産業上極めて有用な効果
を発揮する。
As described above in detail, according to the present invention, since the fluidity of the developer can be evaluated by the inclination angle of the developer mounting table, it becomes possible to easily evaluate the fluidity even with a moisture-absorbed developer. By supplying a developer having good properties, an extremely useful effect in the industry that the charge amount can be made uniform is exhibited.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明による一実施例の斜視図、 第2図は第1図の現像剤の流れ出す傾斜角度を示す一部
破断を含む側面図、 第3図は第2図の現像剤の流れ終わる傾斜角度を示す一
部破断を含む側面図、 第4図は従来技術による側断面図、 第5図は第4図の現像剤が落下しない状態を示す側断面
図、 第6図は含有水分量と傾斜角度との相関曲線図、 である。 図において、 1は基台、2は現像剤載置台、5は現像剤をそれぞれ示
す。
1 is a perspective view of an embodiment according to the present invention, FIG. 2 is a side view including a partial breakage showing an inclination angle at which the developer of FIG. 1 flows out, and FIG. 3 is a flow of the developer of FIG. FIG. 4 is a side cross-sectional view showing a state in which the developer is not dropped, and FIG. 6 is a moisture content chart showing a moisture content. It is a correlation curve figure of a quantity and a tilt angle. In the figure, 1 is a base, 2 is a developer mounting table, and 5 is a developer.

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】水平位置から傾斜可能に設置した現像剤載
置台に試験すべき所定量の現像剤を載置して徐々に傾斜
させ、現像剤の流れ出す傾斜角度と流れ終わる傾斜角度
とで流動性を判定することを特徴とする現像剤の流動性
試験方法。
1. A predetermined amount of developer to be tested is placed on a developer mounting table that is tiltable from a horizontal position and is gradually tilted, and the developer flows at an inclination angle at which the developer flows out and an inclination angle at which the developer ends. A fluidity test method for a developer, which comprises determining the property.
【請求項2】所定量の現像剤を載置して水平位置から傾
斜可能に設置した現像剤載置台と、該現像剤載置台の現
像剤が流れ出す傾斜角度と流れ終わる傾斜角度とを測定
する角度計と、 からなることを特徴とする現像剤の流動性試験装置。
2. A developer mounting table on which a predetermined amount of developer is mounted and is tiltable from a horizontal position, and an inclination angle at which the developer on the developer mounting table flows out and an inclination angle at which the developer ends are measured. A developer fluidity testing device comprising a goniometer and.
JP2237777A 1990-09-07 1990-09-07 Developer fluidity test method and test apparatus Expired - Lifetime JP2503298B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2237777A JP2503298B2 (en) 1990-09-07 1990-09-07 Developer fluidity test method and test apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2237777A JP2503298B2 (en) 1990-09-07 1990-09-07 Developer fluidity test method and test apparatus

Publications (2)

Publication Number Publication Date
JPH04116449A JPH04116449A (en) 1992-04-16
JP2503298B2 true JP2503298B2 (en) 1996-06-05

Family

ID=17020277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2237777A Expired - Lifetime JP2503298B2 (en) 1990-09-07 1990-09-07 Developer fluidity test method and test apparatus

Country Status (1)

Country Link
JP (1) JP2503298B2 (en)

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JP3081524B2 (en) * 1995-06-23 2000-08-28 三洋電機株式会社 Communication equipment
JP2006078238A (en) * 2004-09-08 2006-03-23 Ricoh Co Ltd Powder evaluation device and toner for static charge development
NL1029189C2 (en) * 2005-06-06 2006-12-14 Oce Tech Bv Printing process in combination with a toner suitable for use in this process.
JP5111027B2 (en) * 2007-09-06 2012-12-26 株式会社リコー Development fluidity evaluation system
JP6323896B2 (en) * 2013-05-08 2018-05-16 ディーアイティー株式会社 Powder flowability evaluation apparatus and powder flowability evaluation method
CN105324656B (en) * 2013-05-09 2018-08-03 荷兰联合利华有限公司 Method for the non-dropping performance for proving hair dye

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109031904A (en) * 2015-05-28 2018-12-18 湖北鼎龙控股股份有限公司 The test method of toner-particle mobility

Also Published As

Publication number Publication date
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