JPH06596B2 - Pneumatic paper transport device - Google Patents
Pneumatic paper transport deviceInfo
- Publication number
- JPH06596B2 JPH06596B2 JP61008583A JP858386A JPH06596B2 JP H06596 B2 JPH06596 B2 JP H06596B2 JP 61008583 A JP61008583 A JP 61008583A JP 858386 A JP858386 A JP 858386A JP H06596 B2 JPH06596 B2 JP H06596B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- transport
- sheet
- negative pressure
- pressure
- 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
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- Paper Feeding For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は複写機等で使用される用紙搬送装置に関し、特
に空気圧を利用して用紙を搬送するものに関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device used in a copying machine or the like, and more particularly to a sheet conveying device that utilizes air pressure.
第9図は従来の空気圧利用式用紙搬送装置の平面図、第
10図は同横断面図、第11図は同縦断面図を示し、圧
力容器となる搬送筐体1の外周に複数本の細い搬送ベル
ト2を平行に巻装し、ローラ3及びローラ4により、搬
送筐体1の周りを回転させ、プラテンガラス5上の用紙
6を用紙止め7に突き当たるまで搬送するようになって
いる。FIG. 9 is a plan view of a conventional air pressure type sheet conveying apparatus, FIG. 10 is a horizontal sectional view of the same, and FIG. 11 is a vertical sectional view of the same. A thin conveyor belt 2 is wound in parallel, and the roller 3 and the roller 4 are rotated around the conveyor housing 1 to convey the paper 6 on the platen glass 5 until it abuts on the paper stopper 7.
搬送筐体1の表面の所定箇所には、第10図に示すよう
に複数の透孔8が設けられ、搬送筐体1の一方の端部の
吸引口9から空気を吸引することにより、搬送ベルト2
間の用紙吸引部10に負圧を発生させ、用紙6を搬送ベ
ルト2方向に吸引し用紙6が確実に搬送されるようにな
っている。なお、11は用紙吸引部10における負圧を均一
化するためのA字状の区切り板である。As shown in FIG. 10, a plurality of through holes 8 are provided at a predetermined position on the surface of the transport housing 1, and air is sucked from a suction port 9 at one end of the transport housing 1 to transport the air. Belt 2
A negative pressure is generated in the sheet suction unit 10 between them, and the sheet 6 is sucked toward the transport belt 2 so that the sheet 6 is reliably transported. Reference numeral 11 is an A-shaped separator for equalizing the negative pressure in the paper suction unit 10.
しかし、上述の搬送装置では、搬送筐体1の面積に比べ
て小さい用紙6を搬送する場合、用紙6を一旦用紙止め
7で停止させて再び搬送しようとすると、用紙6が用紙
吸引部10から落下し、用紙6を確実に搬送することがで
きず搬送不良となるという問題があった。However, in the above-described transport device, when transporting a sheet 6 that is smaller than the area of the transport housing 1, when the sheet 6 is once stopped by the sheet stopper 7 and is transported again, the sheet 6 is removed from the sheet suction unit 10. There is a problem in that the paper sheet 6 drops, and the paper sheet 6 cannot be reliably transported, resulting in poor transportation.
これは、用紙6が小さい場合、第9図において用紙6が
搬送筐体1の左上の隅部に位置し、搬送筐体1の表面
に、用紙6で塞がれない領域ができ、この部分の用紙吸
引部10から負圧が用紙6の裏側(第11図において用紙6
の下側)にまで広がり、第12図に示すように、搬送筐体
1内の静圧P1と、用紙6の裏側の静圧P2との差ΔPが小
さくなり、用紙6が用紙吸引部10に吸引される力が弱く
なるからである。This is because when the paper 6 is small, the paper 6 is located in the upper left corner of the transport housing 1 in FIG. 9, and there is a region on the surface of the transport housing 1 that is not blocked by the paper 6. Negative pressure is applied to the back side of the paper 6 (paper 6
12), the difference ΔP between the static pressure P1 in the transport housing 1 and the static pressure P2 on the back side of the sheet 6 becomes small, and the sheet 6 is sucked by the sheet suction unit 10 as shown in FIG. This is because the power to be sucked into is weakened.
本発明は、上記問題点を解決するために案出されたもの
であって、搬送筐体に比べて用紙が小さい場合でも確実
に用紙を搬送することができる用紙搬送装置を提供する
ことを目的とする。The present invention has been devised to solve the above problems, and an object of the present invention is to provide a paper transporting device that can reliably transport paper even when the paper is smaller than the transport housing. And
本発明は、周囲に複数の搬送ベルトが設けられた搬送筐
体に複数の透孔を設けると共に、上記搬送筐体内の空気
を吸引することにより、複数の搬送ベルト間に大気に対
して負圧となる用紙吸引部を形成した空気圧利用式用紙
搬送装置において、上記搬送筐体内に、同搬送筐体内
を、小サイズ用紙搬送用領域が大サイズ用紙搬送用領域
に比べて吸引口側且つ用紙搬送方向の下流側に位置する
ように小サイズ用紙搬送用領域と大サイズ用紙搬送用領
域とに分割し、上記小サイズ用紙搬送用領域の上記用紙
吸引部の負圧を上記大サイズ用紙搬送用領域の上記用紙
吸引部の負圧に比較して大とする圧力調節用部材を設け
たことを特徴とする。According to the present invention, a plurality of through holes are provided in a transport casing around which a plurality of transport belts are provided, and air in the transport casing is sucked, so that a negative pressure is applied to the atmosphere between the plurality of transport belts. In an air pressure type paper transporting device in which a paper suction unit is formed, the small size paper transport area is located inside the transport housing and is closer to the suction port than the large size paper transport area. It is divided into a small-sized sheet conveying area and a large-sized sheet conveying area so as to be located on the downstream side in the direction, and the negative pressure of the sheet suction section in the small-sized sheet conveying area is set to the large-sized sheet conveying area. The pressure adjusting member, which has a larger pressure than the negative pressure of the sheet suction section, is provided.
用紙は、用紙吸引部の負圧で引かれながら複数の搬送ベ
ルトにより搬送され搬送筐体の下流側に到って停止す
る。このとき、圧力調節用部材の存在により、用紙吸引
部の負圧は用紙搬送方向に関して上流側よりも下流側の
方が大とされているので、小さな用紙を搬送する場合
も、用紙が存在する下流側に集中して負圧が与えられ
る。これにより、搬送筐体における用紙の領域以外の負
圧雰囲気が大気圧に近いレベルまで近づき、小さな用紙
を搬送する場合も、用紙の搬送方向及びこれに直交する
方向の2方向に関して負圧が用紙の裏側に広がることが
なくなり、用紙が確実に吸引され搬送再開時に用紙が用
紙吸引部から落下することがなくなる。The sheet is conveyed by a plurality of conveying belts while being pulled by the negative pressure of the sheet suction unit, reaches the downstream side of the conveying case, and stops. At this time, due to the presence of the pressure adjusting member, the negative pressure of the paper suction unit is greater on the downstream side than on the upstream side in the paper transport direction, so that the paper exists even when transporting a small paper. Negative pressure is concentrated on the downstream side. As a result, even when a negative pressure atmosphere other than the area of the paper in the transport housing approaches a level close to the atmospheric pressure and a small paper is transported, the negative pressure is applied in the two directions of the paper transport direction and the direction orthogonal thereto. The sheet does not spread to the back side of the sheet, and the sheet is reliably sucked so that the sheet does not drop from the sheet suction unit when the conveyance is restarted.
以下、本発明の実施例について図面を参照して説明す
る。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第1図は本発明による用紙搬送装置の第1の実施例を示
し、第9図に対応する箇所には同一符号を付し重複説明
は省略する。FIG. 1 shows a first embodiment of the sheet conveying apparatus according to the present invention, the portions corresponding to those in FIG. 9 are designated by the same reference numerals, and the duplicate description will be omitted.
第1図において12,13及び14は板状の抵抗体を示し、そ
れぞれ搬送筐体1の側面、吸引口9の近傍及び区切り板
11の頂点近傍に設けられる。したがって、これらの抵抗
体12,13及び14によって、搬送筐体1内は、吸引口9に
近い小サイズ用紙搬送用の第1の領域R1と、大サイズ用
紙搬送用の台2の領域R2及び第3の領域R3の三つの領域
に分割される。ただし、これらの領域R1,R2及びR3は完
全に分離されるのではなく、抵抗体12と区切り板11との
隙間S1、及び抵抗体13と抵抗体14との隙間S2により連通
している。In FIG. 1, reference numerals 12, 13 and 14 denote plate-shaped resistors, which are the side surface of the transport housing 1, the vicinity of the suction port 9 and the partition plate, respectively.
It is provided near the apex of 11. Therefore, due to these resistors 12, 13, and 14, the inside of the transport housing 1 has a first region R1 for transporting small-sized paper near the suction port 9 and a region R2 of the table 2 for transporting large-sized paper. The third region R3 is divided into three regions. However, these regions R1, R2, and R3 are not completely separated, but communicate with each other through a gap S1 between the resistor 12 and the partition plate 11 and a gap S2 between the resistor 13 and the resistor 14.
したがって、吸引口9から空気が吸引されると、第2の
領域R2内の空気は隙間S1を通って第1の領域R1に移動
し、その後、搬送筐体1外に排出される。また、第3の
領域R3内の空気は隙間S2を通って第1の領域R1に移動
し、その後搬送筐体1外に排出される。Therefore, when the air is sucked from the suction port 9, the air in the second region R2 moves to the first region R1 through the gap S1 and is then discharged to the outside of the transport casing 1. Further, the air in the third region R3 moves to the first region R1 through the gap S2 and is then discharged to the outside of the transport housing 1.
このとき、隙間S1,S2の間隔を適当に選定することによ
り、各領域R1,R2及びR3の圧力は第3図に示すように、
第1の領域R1の負圧PS0が最も大きく、第2の領域R2及
び第3の領域R3の負圧は(0.5〜0.6)PSO程度となる。At this time, the pressure in each of the regions R1, R2, and R3 can be set as shown in FIG. 3 by appropriately selecting the gaps S1 and S2.
The negative pressure P S0 in the first region R1 is the largest, and the negative pressures in the second region R2 and the third region R3 are about (0.5 to 0.6) P SO .
いま、小さい用紙6が搬送される場合を考えると、用紙
6が用紙止め7で停止されている状態では、用紙6は小
サイズ用紙搬送用の第1の領域R1に位置する。このと
き、抵抗体12,13及び14の通気抵抗作用により、用紙6
で塞がれていない領域R2,R3の負圧は小さくなっている
ので、用紙6の裏側に広がる負圧が小さくなる。Now, considering the case where the small paper 6 is conveyed, when the paper 6 is stopped by the paper stopper 7, the paper 6 is located in the first region R1 for small-size paper conveyance. At this time, due to the air flow resistance action of the resistors 12, 13 and 14, the paper 6
Since the negative pressure in the regions R2 and R3 that are not blocked by is small, the negative pressure that spreads to the back side of the paper 6 is small.
したがって、第4図に示すように、圧力計PG1で測定し
た搬送筐体1内の静圧P1と、圧力計PG2で測定した用紙
6の裏側の静圧P2との差ΔPが充分大きくなり、用紙6
が用紙吸引部10に確実に吸引される。Therefore, as shown in FIG. 4, the difference ΔP between the static pressure P1 in the transport housing 1 measured by the pressure gauge PG1 and the static pressure P2 on the back side of the sheet 6 measured by the pressure gauge PG2 becomes sufficiently large, Paper 6
Are reliably sucked by the paper suction unit 10.
なお、大きい用紙を搬送する場合は、小サイズ用紙搬送
用の第1の領域R1と、大サイズ用紙搬送用の第2の領域
R2及び第3の領域R3の三つの領域の用紙吸引部10により
吸引され、搬送される。When transporting large paper, the first region R1 for transporting small size paper and the second region for transporting large size paper
The sheet is sucked and conveyed by the sheet suction unit 10 in the three areas R2 and the third area R3.
第5図は本発明による用紙搬送装置の第2の実施例を示
し、第1の実施例に対応する箇所には同一符号を付し重
複説明は省略する。FIG. 5 shows a second embodiment of the paper transporting apparatus according to the present invention. The parts corresponding to those of the first embodiment are designated by the same reference numerals and their duplicate description will be omitted.
第5図において15及び16は遮蔽板を示し、それぞれ搬送
筐体1の側面と区切り板11との間、及び区切り板11の頂
点近傍と吸引9の近傍との間に設けられると共に、各遮
蔽板15,16には電磁バルブ17,18が貫通して設けられ
る。したがって、各遮蔽板15,16によって、搬送筐体1
内は第1の領域R1、第2の領域R2及び第3の領域R3に分
割され、電磁バルブ17,18の開閉によりこれらの領域R
1,R2及びR3が分離されたり、連通されたりする。In FIG. 5, reference numerals 15 and 16 denote shielding plates, which are provided between the side surface of the transport housing 1 and the partition plate 11, and between the vicinity of the top of the partition plate 11 and the suction 9, respectively. Electromagnetic valves 17 and 18 are provided penetrating the plates 15 and 16. Therefore, the transport housing 1 is provided by the shielding plates 15 and 16.
The inside is divided into a first region R1, a second region R2 and a third region R3, and these regions R are opened and closed by opening and closing the electromagnetic valves 17 and 18.
1, R2 and R3 are separated or connected.
また、搬送筐体1に用紙6の位置を検出するセンサ19が
設けられ、用紙6の搬送状態に応じて上記の電磁バルブ
17,18の開閉を制御する。Further, a sensor 19 for detecting the position of the sheet 6 is provided in the transport case 1, and the electromagnetic valve described above is selected according to the transport state of the sheet 6.
Controls the opening and closing of 17 and 18.
いま、用紙6が搬送ベルト2により搬入される状態を考
えると、最初は電磁バルブ17,18が第8図Aに示すよう
に「開」、センサ19の出力は第8図Bに示すよに
「低」、搬送ベルト2の回転停止を制御する搬送ベルト
駆動用クラッチ(図示せず)は第8図Cに示すように
「オン」となっており、用紙6は各領域R1,R2及びR3の
用紙吸引部10により吸引された状態で搬送される。Now, considering the state where the paper 6 is carried in by the conveyor belt 2, initially the electromagnetic valves 17 and 18 are “open” as shown in FIG. 8A, and the output of the sensor 19 is as shown in FIG. 8B. "Low", the conveyor belt driving clutch (not shown) that controls the rotation stop of the conveyor belt 2 is "on" as shown in FIG. 8C, and the paper 6 is in each of the areas R1, R2 and R3. The sheet is conveyed while being sucked by the sheet suction unit 10.
時点T1で、センサ19により用紙6が検出されると、セン
サ19の出力は「高」となって、搬送ベルト駆動用クラッ
チは「オフ」となり、搬送ベルト2が停止するととも
に、電磁バルブ17,18が「閉」となる。したがって、領
域R2,R3の通気孔8からは空気が吸引されず、用紙6で
塞がれていない領域R2,R3の負圧は小さくなるので、用
紙6の裏側に広がる負圧が小さくなり、第8図Dに示す
ように搬送筐体1内の静圧P1と、用紙6の裏側の静圧P2
との差ΔPが充分大きくなり、用紙6が用紙吸引部10に
確実に吸引される。At time T1, when the sensor 6 detects the sheet 6, the output of the sensor 19 becomes “high”, the conveyor belt driving clutch becomes “off”, the conveyor belt 2 stops, and the electromagnetic valve 17, 18 becomes "closed". Therefore, air is not sucked from the vent holes 8 in the regions R2 and R3, and the negative pressure in the regions R2 and R3 not blocked by the paper 6 becomes small, so that the negative pressure spreading to the back side of the paper 6 becomes small. As shown in FIG. 8D, the static pressure P1 in the transport housing 1 and the static pressure P2 on the back side of the paper 6
The difference .DELTA.P from .DELTA. Becomes sufficiently large, and the sheet 6 is reliably sucked by the sheet suction unit 10.
なお、電磁バルブ17,18が「閉」の状態でも、領域R2,
R3の負圧は零にはならないが、第7図に示すように、第
1の領域R1の負圧PSOに対して、第2の領域R2及び第3
の領域R3の負圧が(0.4〜0.5)PSO程度になれば実用上
有効である。Even when the electromagnetic valves 17 and 18 are closed, the area R2,
Although the negative pressure of R3 does not become zero, as shown in FIG. 7, the negative pressure P SO of the first region R1 is different from that of the second region R2 and the third region.
It is practically effective if the negative pressure in the region R3 is about (0.4 to 0.5) P SO .
また、所定時間が経過すると、時点T2で搬送ベルト駆動
用クラッチが再度「オン」とされて搬送ベルト2が回転
し、またこれをトリガとして電磁バルブ17,18が「開」
とされ、用紙6は各領域R1,R2及びR3の用紙吸引部10に
より吸引された状態で搬送される。Further, when a predetermined time elapses, the conveyor belt drive clutch is turned on again at time T2, the conveyor belt 2 rotates, and this triggers the electromagnetic valves 17 and 18 to open.
Thus, the sheet 6 is conveyed while being sucked by the sheet suction unit 10 in each of the areas R1, R2 and R3.
以上述べたように本発明によれば、小さな用紙を搬送す
る場合でも、用紙の搬送方向及びこれに直交する方向の
2方向に関して負圧が用紙の裏側に負圧が広がることが
ないので、用紙が確実に吸引され搬送不良となることが
ない。As described above, according to the present invention, even when a small sheet is conveyed, the negative pressure does not spread to the back side of the sheet in the two directions of the sheet conveying direction and the direction orthogonal to the sheet conveying direction. Will not be sucked reliably and will not result in poor conveyance.
第1図は本発明による用紙搬送装置の第1の実施例の横
断面図、第2図は同縦断面図、第3図は第1の実施例に
おける搬送筐体内の各領域の圧力を示すグラフ、第4図
は第1の実施例における静圧の経時変化を示すグラフ、
第5図は本発明による用紙搬送装置の第2の実施例の横
断面図、第6図は第5図のI−I線断面図、第7図は第
2の実施例における搬送筐体内の各領域の圧力を示すグ
ラフ、第8図は第2の実施例における各部の動作状態及
び静圧の経時変化を示すグラフ、第9図は従来の空気圧
利用式用紙搬送装置の平面図、第10図は同横断面図、第
11図は同縦断面図、第12図は従来例における静圧の経時
変化を示すグラフである。 1:搬送筐体 2:ベルト 3,4:ローラ 5:プラテンガラス 6:用紙 7:用紙止め 8:透孔 9:吸引口 10:用紙吸引部 11:区切り板 12,13,14:抵抗体 15,16:遮蔽板 17,18:電磁バルブ 19:センサFIG. 1 is a transverse sectional view of a first embodiment of a sheet conveying apparatus according to the present invention, FIG. 2 is a longitudinal sectional view of the same, and FIG. 3 shows pressures in respective regions in a conveying case in the first embodiment. Graph, FIG. 4 is a graph showing changes in static pressure with time in the first embodiment,
FIG. 5 is a cross-sectional view of a second embodiment of the paper transporting device according to the present invention, FIG. 6 is a cross-sectional view taken along the line I--I of FIG. 5, and FIG. FIG. 8 is a graph showing the pressure in each region, FIG. 8 is a graph showing the operating state of each part in the second embodiment and the change over time in static pressure, and FIG. 9 is a plan view of a conventional air pressure type sheet conveying device. The figure shows the same cross section,
FIG. 11 is a longitudinal sectional view of the same, and FIG. 12 is a graph showing changes with time of static pressure in a conventional example. 1: Transport case 2: Belt 3, 4: Roller 5: Platen glass 6: Paper 7: Paper stop 8: Through hole 9: Suction port 10: Paper suction part 11: Separation plate 12, 13, 14: Resistor 15 , 16: Shielding plate 17, 18: Electromagnetic valve 19: Sensor
Claims (1)
筐体に複数の透孔を設けると共に、上記搬送筐体内の空
気を吸引することにより、複数の搬送ベルト間に大気に
対して負圧となる用紙吸引部を形成した空気圧利用式用
紙搬送装置において、 上記搬送筐体内に、同搬送筐体内を、小サイズ用紙搬送
用領域が大サイズ用紙搬送用領域に比べて吸引口側且つ
用紙搬送方向の下流側に位置するように小サイズ用紙搬
送用領域と大サイズ用紙搬送用領域とに分割し、上記小
サイズ用紙搬送用領域の上記用紙吸引部の負圧を上記大
サイズ用紙搬送用領域の上記用紙吸引部の負圧に比較し
て大とする圧力調節用部材を設けたことを特徴とする空
気圧利用式用紙搬送装置。1. A plurality of through holes are provided in a transport casing around which a plurality of transport belts are provided, and air in the transport casing is sucked so that a negative pressure is applied to the atmosphere between the plurality of transport belts. In an air pressure type paper transporting device in which a paper suction unit that serves as pressure is formed, in the above-mentioned transport housing, a small size paper transport area has a suction port side compared to a large size paper transport area It is divided into a small-size paper transport area and a large-size paper transport area so as to be located on the downstream side in the transport direction, and the negative pressure of the paper suction unit in the small-size paper transport area is used for the large-size paper transport area. An air pressure type sheet conveying device, characterized in that a pressure adjusting member is provided which is larger than the negative pressure of the sheet suction portion in the area.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61008583A JPH06596B2 (en) | 1986-01-17 | 1986-01-17 | Pneumatic paper transport device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61008583A JPH06596B2 (en) | 1986-01-17 | 1986-01-17 | Pneumatic paper transport device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62167155A JPS62167155A (en) | 1987-07-23 |
JPH06596B2 true JPH06596B2 (en) | 1994-01-05 |
Family
ID=11697026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61008583A Expired - Lifetime JPH06596B2 (en) | 1986-01-17 | 1986-01-17 | Pneumatic paper transport device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06596B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018056245A1 (en) * | 2016-09-23 | 2018-03-29 | コニカミノルタ株式会社 | Recording medium conveyance device and image-recording device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2707170C2 (en) * | 1977-02-18 | 1982-07-15 | Siemens AG, 1000 Berlin und 8000 München | Pneumatic brake for a recording medium |
JPS57181563A (en) * | 1981-05-02 | 1982-11-09 | Ricoh Co Ltd | Conveyor for transfer paper |
-
1986
- 1986-01-17 JP JP61008583A patent/JPH06596B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS62167155A (en) | 1987-07-23 |
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