JPH0739296B2 - Transfer paper feeding device - Google Patents
Transfer paper feeding deviceInfo
- Publication number
- JPH0739296B2 JPH0739296B2 JP60257258A JP25725885A JPH0739296B2 JP H0739296 B2 JPH0739296 B2 JP H0739296B2 JP 60257258 A JP60257258 A JP 60257258A JP 25725885 A JP25725885 A JP 25725885A JP H0739296 B2 JPH0739296 B2 JP H0739296B2
- Authority
- JP
- Japan
- Prior art keywords
- transfer paper
- transfer
- friction member
- pressing force
- spring
- 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
Links
Description
【発明の詳細な説明】 （イ）産業上の利用分野 この発明は、主に、複写機に使用される転写紙の送出装
置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention mainly relates to a transfer sheet feeding device used in a copying machine.
（ロ）従来の技術 転写紙をその収容ケースから順次１枚ずつ転写部へ送出
するために、転写紙の表面に接触して回転する送出ロー
ラと転写紙の裏面を押圧する摩擦部材とを使用し、送出
ローラと摩擦部材の摩擦力により転写紙を分離して送出
する送出装置が用いられている。ところで、このような
送出装置においては、転写紙の送出不良や分離不良を防
止するために、送出ローラと摩擦部材との転写紙に対す
る摩擦力を所定範囲に維持しておく必要があり、これに
対して、送出ローラの負荷トルクを検出し、それによっ
て送出ローラの摩擦部材の押圧力を変化させる送出装置
が提案されている（たとえば、特開昭58−74437号公報
参照）。(B) Conventional technology In order to sequentially send the transfer papers one by one from the storage case to the transfer unit, a sending roller that contacts the surface of the transfer paper and rotates, and a friction member that presses the back surface of the transfer paper are used. However, there is used a delivery device that separates and delivers the transfer paper by the frictional force of the delivery roller and the friction member. By the way, in such a delivery device, in order to prevent delivery failure and separation failure of the transfer sheet, it is necessary to maintain the frictional force between the delivery roller and the friction member with respect to the transfer sheet within a predetermined range. On the other hand, there has been proposed a delivery device that detects the load torque of the delivery roller and changes the pressing force of the friction member of the delivery roller according to the detected load torque (see, for example, JP-A-58-74437).
（ハ）発明が解決しようとする問題点 しかしながら、この従来技術では、転写紙の送出中に、
その送出ローラの負荷トルクを検出し、それに対応する
押圧力を算出して摩擦部材の送出ローラに対する押圧力
を制御する、いわゆる、フィードバック制御を採用して
いるため、制御系に遅れが生じて即応性に欠けるという
問題や、転写紙がスリップを生じた場合に、送出ローラ
および摩擦部材と転写紙との間の摩擦が静止摩擦から動
摩擦へと複雑に変化して、送出ローラの負荷トルクが不
連続に変化するため、その不安定な負荷トルクを検出す
るフィードバック制御系に乱調を生じ、安定した制御を
行うことが難かしいという問題点などがあった。(C) Problems to be Solved by the Invention However, in this conventional technique, during transfer paper transfer,
The so-called feedback control is used, in which the load torque of the delivery roller is detected and the corresponding pressing force is calculated to control the pressing force of the friction member with respect to the delivery roller. In addition, when the transfer paper slips, the friction between the transfer roller and the friction member and the transfer paper complicatedly changes from static friction to dynamic friction, and the load torque of the transfer roller becomes inconsistent. Since it continuously changes, a feedback control system that detects the unstable load torque is disturbed, and there is a problem that it is difficult to perform stable control.
この発明は、このような事情を考慮してなされたもの
で、転写紙の送出以前に送出手段と摩擦部材との押圧力
を適正値に自動的に設定し、安定した送出が可能な転写
紙の送出装置を提供するものである。The present invention has been made in view of the above circumstances, and the transfer paper which enables stable delivery by automatically setting the pressing force between the delivery means and the friction member to an appropriate value before the delivery of the transfer paper. The present invention provides a delivery device for
（ニ）問題点を解決するための手段 この発明は、複数の転写紙を重ねて収容する収容ケース
と、収容された転写紙の表面に接触しつつ回転する送出
手段と、収容ケースの転写紙を転写紙の総重量に対応す
る押圧力でを前記送出手段に押圧するよう付勢された押
圧手段と、送出される転写紙を前記送出手段に押圧し転
写紙の裏面に摩擦抵抗を与えるよう付勢された摩擦部材
と、前記摩擦部材の押圧力を収容ケース内の転写紙の重
量の増減に応じて動的かつ連続的に変化させる調整手段
とを備えてなる転写紙送出装置である。(D) Means for Solving the Problems The present invention relates to a storage case for accommodating a plurality of transfer papers in an overlapping manner, a feeding means for rotating while contacting the surface of the transfer papers stored therein, and a transfer paper for the storage case. A pressing means urged to press the delivery means with a pressing force corresponding to the total weight of the transfer paper; and a transfer paper to be delivered is pressed against the delivery means to give a frictional resistance to the back surface of the transfer paper. A transfer sheet feeding device comprising: a biased friction member; and an adjusting unit that dynamically and continuously changes the pressing force of the friction member according to an increase or decrease in the weight of the transfer sheet in the housing case.
（ホ）作 用 一般に、押圧手段の送出手段に対する押圧力が、摩擦部
材の送出手段に対する加圧力よりも過大になると、転写
紙は重なって送出され分離不良となり、逆に摩擦部材の
押圧力の方が過大になると送出不良となるので、両者の
バランスを適当に維持する必要がある。(E) Operation In general, when the pressing force of the pressing means against the sending means becomes larger than the pressing force of the friction member against the sending means, the transfer sheets are sent out in an overlapping manner, resulting in separation failure. If it becomes too large, it will result in defective delivery, so it is necessary to maintain an appropriate balance between the two.
ところで、押圧手段の押圧力は収容ケースの転写紙収容
枚数によって変化する。しかし、この発明によれば、そ
の程度は押圧手段の変位量によって検出され調整手段に
よって摩擦部材の押圧力が調整されるため、押圧手段と
摩擦部材の送給手段に対する加圧力が常に適正に設定さ
れ、安定した転写紙の送出が行われる。By the way, the pressing force of the pressing means changes depending on the number of transfer paper sheets stored in the storage case. However, according to the present invention, the degree is detected by the displacement amount of the pressing means and the pressing force of the friction member is adjusted by the adjusting means, so that the pressing force of the pressing means and the feeding means of the friction member is always set appropriately. Thus, stable transfer paper is delivered.
（ヘ）実施例 以下、図面に示す実施例に基づいてこの発明を詳述す
る。なお、これによってこの発明が限定されるものでは
ない。(F) Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. The present invention is not limited to this.
第１図はこの発明の一実施例を示す説明図であり、
（１）は複数の転写紙（３）を重ねて収容する収容ケー
ス、（２）は収容された転写紙（３）の表面に接触しつ
つ回転する送出ローラ、（４）は収容ケースの転写紙
（３）を送出ローラ（２）に押圧するよう支点（4a）に
支持されバネ（５）によって付勢された押圧手段、
（６）は送出される転写紙（３）を送出ローラ（２）に
押圧し転写紙（３）の裏面に摩擦抵抗を与えるようバネ
（７）によって付勢された摩擦部材、（８）は押圧手段
（４）にバネ（９）によって接続され押圧手段（４）の
変位量によって摩擦部材（６）の押圧力を変化させる調
整手段である。調整手段（８）は支点（8a）を中心に回
動可能に支持され、その一端には摩擦部材（６）が固定
されると共に、他端には押圧手段（４）の端部に一端が
係止されたバネ（９）の他端が係止されている。FIG. 1 is an explanatory view showing an embodiment of the present invention,
(1) is a storage case for accommodating a plurality of transfer papers (3) in a stack, (2) is a delivery roller that rotates while being in contact with the surface of the stored transfer papers (3), and (4) is a transfer of the storage case Pressing means supported by a fulcrum (4a) to press the paper (3) against the delivery roller (2) and urged by a spring (5),
(6) is a friction member urged by a spring (7) so as to press the transfer sheet (3) to be sent out to the sending roller (2) and give a frictional resistance to the back surface of the transfer sheet (3), and (8) is The adjusting means is connected to the pressing means (4) by a spring (9) and changes the pressing force of the friction member (6) according to the displacement amount of the pressing means (4). The adjusting means (8) is rotatably supported around a fulcrum (8a), a friction member (6) is fixed to one end thereof, and the other end has one end at the end of the pressing means (4). The other end of the locked spring (9) is locked.
このような構成において、収容ケース（１）に多くの転
写紙（３）が装着される時、転写紙（３）の重力により
バネ（５）が引伸ばされて送出ローラへの押圧力（P1）
が増大する場合には、摩擦部材（６）の押圧力（P2）を
それに対応して増大させる必要がある。ところで、第１
図においてバネ（５）が引伸ばされると、押圧手段
（４）が支点（4a）を中心に反時計方向に回動するの
で、バネ（９）の引張力が減少する。従って、調整手段
（８）の支点（8a）を中心としてバネ（７）の引張力に
よって時計方向に作用する回転モーメントが増大し、そ
れによって摩擦部材（６）の送給ローラに対する押圧力
が増大する。In such a configuration, when many transfer papers (3) are mounted in the storage case (1), the spring (5) is stretched by the gravity of the transfer paper (3) and the pressing force (P1 )
In case of increasing, the pressing force (P2) of the friction member (6) needs to be correspondingly increased. By the way, first
In the figure, when the spring (5) is stretched, the pressing means (4) rotates counterclockwise around the fulcrum (4a), so that the tensile force of the spring (9) decreases. Therefore, the rotational moment acting clockwise by the tensile force of the spring (7) around the fulcrum (8a) of the adjusting means (8) increases, thereby increasing the pressing force of the friction member (6) against the feed roller. To do.
また、送出ローラ（２）によって転写紙（３）が送出さ
れて収容ケースの転写紙の残量が少くなると、バネ
（５）が収縮して送出ローラ（２）への押圧力（P1）が
減少すると共に、押圧手段（４）が支点（4a）を中心に
時計方向に回動するのでバネ（９）の引張力が増大す
る。従って、調整手段（８）の支点（8a）を中心として
バネ（７）の引張力によって時計方向に作用する回転モ
ーメントが減少し、それによって摩擦部材（６）の送給
ローラ（２）に対する押圧力が減少する。Further, when the transfer paper (3) is sent out by the sending roller (2) and the remaining amount of the transfer paper in the storage case becomes small, the spring (5) contracts and the pressing force (P1) to the sending roller (2) is reduced. With the decrease, the pressing means (4) rotates clockwise around the fulcrum (4a), so that the tensile force of the spring (9) increases. Therefore, the rotational moment acting in the clockwise direction by the tensile force of the spring (7) around the fulcrum (8a) of the adjusting means (8) is reduced, and thereby the friction member (6) is pressed against the feeding roller (2). The pressure decreases.
第２図はこの発明の他の実例例を示す説明図であり、収
容ケース（１）に収容される転写紙（３）が多いほどバ
ネ（５）が大きく引伸ばされるが、バネ（５）のバネ定
数と転写紙（３）の重力との関係から押圧力（P1）が、
前述の実施例とは逆に減少する場合に適用される構成で
ある。第２図では、一端に摩擦部材（６）を有する調整
手段（８）は、その他端の支点（8a）を中心に回動可能
に支持され、バネ（７）およびバネ（９）によって時計
方向に付勢されている。その他の構成は第１図と同等で
ある。FIG. 2 is an explanatory diagram showing another example of the present invention, in which the spring (5) is stretched greatly as the transfer paper (3) stored in the storage case (1) increases. From the relationship between the spring constant of and the gravity of the transfer paper (3), the pressing force (P1) is
This is a configuration applied when the number is reduced contrary to the above-mentioned embodiment. In FIG. 2, an adjusting means (8) having a friction member (6) at one end is rotatably supported around a fulcrum (8a) at the other end, and is rotated clockwise by a spring (7) and a spring (9). Is urged by. Other configurations are the same as those in FIG.
このような構成において、収容ケース（１）に多くの転
写紙（３）が装着されると、転写紙（３）の重力とバネ
（５）の引張力との関係から送出ローラへの押圧力（P
1）が減少するので押圧力（P2）をそれに対応して減少
させる必要がある。ところで、第２図においてバネ
（５）が引張されると、押圧手段（４）が支点（4a）を
中心に反時計方向に回動するのでバネ（９）の引張力が
減少する。従って、調整手段（８）の支点（8a）を中心
としてバネ（７）によって時計方向に作用する回転モー
メントが減少し、それによって摩擦部材（６）の送給ロ
ーラに対する押圧力が減少する。In such a structure, when many transfer papers (3) are attached to the storage case (1), the pressing force to the delivery roller is caused by the relationship between the gravity of the transfer paper (3) and the tensile force of the spring (5). (P
Since 1) decreases, it is necessary to decrease the pressing force (P2) correspondingly. By the way, in FIG. 2, when the spring (5) is pulled, the pressing means (4) rotates counterclockwise around the fulcrum (4a), so that the pulling force of the spring (9) decreases. Therefore, the rotational moment acting clockwise by the spring (7) around the fulcrum (8a) of the adjusting means (8) is reduced, and thereby the pressing force of the friction member (6) against the feed roller is reduced.
また、送出ローラ（２）によって転写紙（３）が送出さ
れて収容ケースの転写紙の重力が小さくなると、バネ
（５）が収縮して送出ローラへの押圧力（P1）が増大す
ると共に、押圧手段（４）が支点（4a）を中心に時計方
向に回動するのでバネ（９）の引張力が増大する。従っ
て、調整手段（８）の支点（8a）を中心としてバネ
（７）によって時計方向に作用する回転モーメントが増
大し、それによって摩擦部材（６）の送給ローラ（２）
に対する押圧力が増大する。When the transfer paper (3) is sent out by the sending roller (2) and the gravity of the transfer paper in the storage case is reduced, the spring (5) contracts and the pressing force (P1) to the sending roller increases, and Since the pressing means (4) rotates clockwise around the fulcrum (4a), the tensile force of the spring (9) increases. Therefore, the rotational moment acting clockwise by the spring (7) around the fulcrum (8a) of the adjusting means (8) is increased, whereby the feeding roller (2) of the friction member (6) is increased.
The pressing force against increases.
いずれの実施例においても、押圧手段の送出ロールに対
する押圧力（P1）が増減すると摩擦部圧の送出ロールに
対する押圧力（P2）がそれに対応して増減され、押圧力
（P1）と（P2）との関係が常に適正に自動調整されるの
で、転写紙は安定して送出される。In any of the embodiments, when the pressing force (P1) of the pressing means against the delivery roll increases or decreases, the pressing force (P2) of the friction portion pressure against the delivery roll increases or decreases correspondingly, and the pressing forces (P1) and (P2) The transfer paper is always sent out stably because the relationship with and is automatically adjusted appropriately.
なお、押圧力（P1）（P2）の関係はバネ（５）（７）
（９）のバネ定数および調整手段（８）の腕長さによっ
て適正に調整される。The relationship between the pressing force (P1) and (P2) is the spring (5) (7).
It is properly adjusted by the spring constant of (9) and the arm length of the adjusting means (8).
また、押圧力（P1）に対応する押圧力（P2）は送出ロー
ラ（３）の作動以前に常に適正値に設定されるので、調
整動作が時間遅れを生じたり、乱調を生じることがな
い。Further, the pressing force (P2) corresponding to the pressing force (P1) is always set to an appropriate value before the operation of the delivery roller (3), so that the adjusting operation does not cause a time delay or disorder.
さらに、複雑な信号処理を要するセンサなどを必要とせ
ず、構成が簡単である。Furthermore, the structure is simple without requiring a sensor that requires complicated signal processing.
（ト）発明の効果 この発明によれば、収容する転写紙の量に対応して摩擦
部材の押圧力が自動的に適正値に調整され、安定した転
写紙の分離・送出が確実に行うことが可能な転写紙送出
装置が提供される。(G) Effect of the Invention According to the present invention, the pressing force of the friction member is automatically adjusted to an appropriate value in accordance with the amount of transfer paper to be stored, and stable separation and delivery of the transfer paper can be reliably performed. There is provided a transfer paper feeding device capable of performing the above.
第１図はこの発明の一実施例を示す説明図、第２図はこ
の発明の他の実施例を示す説明図である。 （１）……収容ケース、（２）……送出ローラ、 （３）……転写紙、（４）……押圧手段、 （５）（７）（９）……バネ、（６）……摩擦部材、 （８）……調整手段。FIG. 1 is an explanatory view showing one embodiment of the present invention, and FIG. 2 is an explanatory view showing another embodiment of the present invention. (1) ... Accommodation case, (2) ... Sending roller, (3) ... Transfer paper, (4) ... Pressing means, (5) (7) (9) ... Spring, (6) ... Friction member (8) ... Adjusting means.
Claims (1)
と、収容された転写紙の表面に接触しつつ回転する送出
手段と、収容ケースの転写紙を転写紙の総重量に対応す
る押圧力で前記送出手段に押圧するよう付勢された押圧
手段と、送出される転写紙を前記送出手段に押圧し転写
紙の裏面に摩擦抵抗を与えるよう付勢された摩擦部材
と、前記摩擦部材の押圧力を収容ケース内の転写紙の重
量の増減に応じて動的かつ連続的に変化させる調整手段
とを備えてなる転写紙送出装置。1. A storage case for accommodating a plurality of transfer papers in an overlapping manner, a feeding means that rotates while contacting the surface of the transfer papers stored therein, and a transfer paper in the storage case corresponding to the total weight of the transfer papers. A pressing member that is urged to press the sending device by pressure; a friction member that is urged to press the transfer paper to be sent to the sending device to give a frictional resistance to the back surface of the transfer paper; and the friction member. A transfer paper feeding device comprising: an adjusting unit that dynamically and continuously changes the pressing force of the transfer paper according to the increase or decrease of the weight of the transfer paper in the housing case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60257258A JPH0739296B2 (en) | 1985-11-15 | 1985-11-15 | Transfer paper feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60257258A JPH0739296B2 (en) | 1985-11-15 | 1985-11-15 | Transfer paper feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62116437A JPS62116437A (en) | 1987-05-28 |
| JPH0739296B2 true JPH0739296B2 (en) | 1995-05-01 |
Family
ID=17303881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60257258A Expired - Lifetime JPH0739296B2 (en) | 1985-11-15 | 1985-11-15 | Transfer paper feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739296B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2712308B2 (en) * | 1988-06-22 | 1998-02-10 | キヤノン株式会社 | Sheet material separation device |
| US5244191A (en) * | 1991-07-08 | 1993-09-14 | Matsushita Electric Industrial Co., Ltd. | Sheet feeding apparatus for image recording system |
| JP3119424B2 (en) * | 1995-03-07 | 2000-12-18 | キヤノン株式会社 | Sheet feeding device and document reading device using the same |
| JP6205862B2 (en) * | 2013-06-03 | 2017-10-04 | ブラザー工業株式会社 | Sheet separation device |
| JP6800576B2 (en) * | 2015-11-09 | 2020-12-16 | キヤノン株式会社 | Sheet feeding device and image forming device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6048844A (en) * | 1983-08-26 | 1985-03-16 | Fuji Xerox Co Ltd | Sheet feeder |
| JPS6064928U (en) * | 1983-10-13 | 1985-05-08 | 株式会社リコー | Friction separation roller paper feeding device |
-
1985
- 1985-11-15 JP JP60257258A patent/JPH0739296B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62116437A (en) | 1987-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0739296B2 (en) | Transfer paper feeding device | |
| JP2680223B2 (en) | Friction separating roller type paper feeder | |
| JP2712308B2 (en) | Sheet material separation device | |
| JP2001026327A (en) | Paper feeder | |
| JP2720361B2 (en) | Sheet material feeding device | |
| JP2754858B2 (en) | Paper feeder of image forming device | |
| JP3502720B2 (en) | Paper feeder | |
| JPH1111717A (en) | Sheet material conveying device and image forming device | |
| JPS6048843A (en) | Sheet feeder | |
| JP2929795B2 (en) | Sheet feeding device | |
| JPH0558493A (en) | Paper separator for paper feeder | |
| JPH0539136A (en) | Automatic sheet feeder | |
| JPH0522513Y2 (en) | ||
| JPS63258335A (en) | Automatic sheet feed device | |
| JPH05229682A (en) | Paper feeding device | |
| JP2572102B2 (en) | Sheet feeding device | |
| JPH05238576A (en) | Pad pressure adjusting device for paper feed cassette | |
| JPH09255172A (en) | Paper feeder | |
| JP2001031271A (en) | Paper feeder | |
| JP2923418B2 (en) | Paper feeder | |
| JP3327609B2 (en) | Paper feeder / transporter | |
| JPH019798Y2 (en) | ||
| JP2001180835A (en) | Printer device | |
| JPH07206196A (en) | Paper sheet handling device of paper feed device | |
| JPH10218411A (en) | Paper feeding cassette |