JP3004162U - Automatic paper feeders such as facsimile machines - Google Patents

Abstract

(57) [Summary] [Purpose] To make the structure simple and to reduce the production cost. A sun gear 21a fixed to one end of a paper take-in roller 5c and a tip end of a swing arm 22 pivotally supported at one end of the paper take-in roller 5c are rotatably supported. , Meshes with the sun gear 21a, and receives the rotational force of the sun gear 21a, is pressed toward the driven gear 23 fixed to one end of the front paper separating roller 5b, and can mesh with the driven gear 23. A planetary gear mechanism 21 including a planetary gear 21b is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic paper feeder used in, for example, a facsimile machine or a copying machine.

[0002]

[Prior art]

An example of a facsimile machine equipped with an automatic paper feeder will be described. As shown in FIG. 3, the facsimile machine includes a transmitter 1, a receiver 2, and a recording paper cutting unit 3. It has a recording head 11 and a receiving-side platen roller 12 that comes into contact with the recording head 11. The recording head 11 records a received signal on a recording paper P drawn from roll paper, and drives the platen roller 12 to rotate. By doing so, the recording paper P 1 on which the received signal is recorded is sent out from the output port 13 of the case main body S to the outside. The recording paper cutting section 3 is composed of a cutter 16 fixed to the support shaft 15 and a fixed blade 17 facing the cutter 16 with the recording paper P sandwiched therebetween. When the cutter 16 and the fixed blade 17 rotate reciprocally by a predetermined angle, the recording paper P sent out from the receiving unit 2 is cut and separated.

The sending unit 1 includes a front paper separating roller 5a, a rear paper separating roller 5b, a pair of upper and lower paper take-in rollers 5c, and a sending side, which are arranged at predetermined intervals along the paper feed direction A of the document G. An original feeding roller 5 including a platen roller 5d and a pair of upper and lower feeding rollers 5e, an elastic body 6 contacting the paper separating rollers 5a and 5b, and a reading head 7 are provided. When the paper is inserted into the insertion port 8, the document feed roller 5 is rotationally driven based on a detection signal from a sensor (not shown) that detects it, and the paper separation rollers 5a and 5b and the elastic bodies 6 and 6 are driven. A plurality of originals G supplied between the two are separated from each other in the front-rear direction along the paper feeding direction A, and are separated, and the separating action of the paper separating rollers 5a and 5b and the elastic bodies 6 and 6 is performed. The original G that passed between the It is sandwiched by a pair of paper take-in rollers 5c, 5c and fed forward, and is pressed against the reading head 7 by the transmission side platen roller 5d, and the information written in the original G is read by the head 7. After that, the pair of upper and lower feed rollers 5e feeds the paper from the take-out port 9 to the outside, and the information read by the reading head 7 is immediately transmitted.

Conventionally, as shown in FIG. 4, the front and rear paper separating rollers 5a and 5b are driven side gears 19a and 19b fixed to the ends of the paper separating rollers 5a and 5b, and the end of the paper take-in roller 5c. Is connected to the lower paper take-in roller 5c through a gear mechanism 19 including a drive-side gear 19c fixed to the section and intermediate gears 19d and 19e interposed between the respective gears 19a to 19c. The number of teeth of each driven-side gear 19a, 19b is larger than the number of teeth of the drive-side gear 19c, and when the paper take-in roller 5c is rotationally driven, the front and rear paper separating rollers 5a, 5b interlock with the paper take-up roller 5c. It is rotated slower than the insertion roller 5c, so that the separating operation of the document G by the front and rear paper separating rollers 5a, 5b and the elastic bodies 6, 6 can be surely performed, and the separated document G is moved up and down. A pair of The paper take-in rollers 5c, 5c feed at high speed so that the reading head 7 can quickly read the information.

In the above configuration, when the document G is sandwiched between the front and rear paper separating rollers 5a and 5b and the elastic bodies 6 and 6 and is fed at a high speed by the pair of upper and lower paper take-in rollers 5c and 5c, the pair of upper and lower paper take-in Due to the difference in rotational speed between the rollers 5c, 5c and the front and rear paper separating rollers 5a, 5b, a large tensile force acts on the original G.

Therefore, when a large tensile force acts on the original G by incorporating the one-way clutches 20a and 20b into the driven gears 19a and 19b, the tensile force causes the front and rear paper separating rollers 5a and 5b to idle. It rotates at the same speed as the pair of upper and lower paper take-in rollers 5c, 5c, so that the original G can be smoothly fed.

[0008]

[Problems to be solved by the device]

 In the above structure, the one-way clutch, which is complicated and expensive, is incorporated in the driven gear, which causes a problem that the manufacturing cost is high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an automatic paper feeder such as a facsimile machine which has a simple structure and can be manufactured at a low cost.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, in the device according to the first aspect, a paper separating roller, an elastic body in contact with the paper separating roller, and a pair of upper and lower paper taking-in rollers are arranged at a predetermined distance in the paper feeding direction. The paper separating roller and the elastic body separate a plurality of papers supplied between them by slightly shifting the position in the front-back direction along the paper feeding direction and separating the papers. In an automatic paper feeding device such as a facsimile machine in which the paper passing between the roller and the elastic body is sandwiched by a pair of upper and lower paper take-in rollers to feed the paper forward, the paper take-in roller and the paper separating roller are used. A planetary gear mechanism is provided for interlocking with and interlocking with each other, and for canceling the interlocking connected state when the rotation speed of the paper separating roller increases.

A second aspect of the present invention is the device of the first aspect, wherein the planetary gear mechanism meshes with a sun gear fixed to an end of the paper take-in roller, and It is characterized in that it is composed of a planetary gear that is pressed against a driven gear fixed to the end of the paper separation roller by receiving the rotational force of the sun gear and meshes with the driven gear.

According to a third aspect of the present invention, in the device according to the first or second aspect, the paper separating roller and the elastic body are provided in a front and rear pair along the sheet feeding direction. It is characterized in that they are interlocked and connected through an interlocking mechanism.

A fourth aspect of the invention is the device of the third aspect, wherein the interlocking mechanism is a pair of pulleys provided at the ends of the front and rear paper separating rollers, and an endless belt wound around the pulleys. It is characterized by consisting of and.

[0014]

[Action]

 In the invention according to claim 1, when a plurality of sheets of paper are inserted between the paper separating roller and the elastic body, the plurality of sheets of paper are interlockingly connected to the paper taking-in roller via a planetary gear mechanism. By the separating action of the elastic member and the rotating paper separating roller, the paper is separated by the front and rear along the paper feeding direction by a slight amount, and then sandwiched by a pair of upper and lower paper take-in rollers. It is fed at high speed in the front. At this time, a large tensile force acts on the above-mentioned paper due to the difference in rotational speed between the pair of upper and lower paper take-in rollers and the front and rear paper separating rollers, and the pulling force increases the rotational speed of the paper separating roller. Since the interlocking coupling action due to is eliminated, the paper separating roller rotates idly and is rotated at the same speed as the paper take-in roller, which makes it possible to smoothly feed the paper.

In this case, since the planetary gear mechanism having a simple structure and low cost is used, the manufacturing cost can be reduced as compared with the conventional automatic paper feeder using the one-way clutch which is complicated and expensive. it can.

According to the second aspect of the present invention, when the paper take-in roller rotates in the paper feeding direction to integrally rotate the sun gear, the planetary gear revolves in synchronism with the rotation of the sun gear. The planetary gear can rotate to rotate the paper separating roller while automatically meshing with the driven side gear integrated with the roller, whereby the paper separating roller is inserted between the elastic member and the paper separating roller. It is possible to automatically shift several sheets of paper one by one and separate them one by one, and the sheets separated one by one are automatically pinched by a pair of upper and lower paper take-up rollers and forwarded automatically. In addition, a large tensile force acts on the paper due to the difference in rotational speed between the pair of upper and lower paper take-in rollers and the front and rear paper separating rollers, and the tensile force increases the rotation speed of the paper separating roller. If the planet gear is from the driven gear It automatically separates, and the paper separating roller idles at the same speed as the paper take-in roller, which allows the paper to be smoothly fed, and the paper take-in roller and the paper separating roller are interlocked and connected. It is possible to solve the problem automatically and smoothly by using the revolution and rotation of the planetary gears.

According to the third aspect of the present invention, the paper separating roller and the elastic body are provided in a front and rear pair along the sheet feeding direction, and both the front and rear paper separating rollers are interlocked and coupled through the interlocking mechanism. Therefore, the plurality of sheets of paper inserted between the paper separating roller and the elastic body are subjected to the separating action in the two steps before and after, and the paper is surely supplied one by one between the pair of upper and lower paper taking rollers. be able to.

According to the invention of claim 4, the interlocking mechanism includes a pair of pulleys provided at the ends of the front and rear paper separating rollers, and an endless belt wound around the pulleys. , The front and rear paper separating rollers can be reliably interlocked, and the construction is simple and the manufacturing cost can be reduced.

[0019]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show an automatic paper feeding device in a facsimile apparatus according to an embodiment of the present invention, which comprises a sun gear 21a fixed to one end of a paper take-in roller 5c and the paper take-in roller 5c. Is rotatably supported by the tip of a swing arm 22 pivotally supported at one end of the front gear, meshes with the sun gear 21a, and receives the rotational force of the sun gear 21a. A planetary gear mechanism 21 including a planetary gear 21b, which is pressed toward a driven gear 23 fixed to one end of the separation roller 5b and is meshable with the driven gear 23, is provided. 5b is provided with an interlocking mechanism 24 composed of pulleys 24a, 24b fixed to the other end and an endless belt 24c wound between the pulleys 24a, 24b, and the number of teeth of the driven gear 23 is equal to that of the sun. Gear 21a When the paper take-in roller 5c is rotationally driven by the drive motor (not shown), the front and rear paper separating rollers 5a and 5b are rotated later than the paper take-in roller 5c in synchronization with the above. It has become so.

In the above structure, when a plurality of originals (paper) G are inserted into the insertion port 8, the paper take-in roller 5c moves in the paper feeding direction based on a detection signal from a sensor (not shown) that detects the insertion. When the sun gear 21a is rotated integrally by the rotation, the planetary gear 21b revolves in response to the sun gear 21a to automatically mesh with the driven gear 23 integrated with the front paper separating roller 5b, and at the same time, The planetary gear 21b can rotate to rotate the front paper separating roller 5b and rotate the rear paper separating roller 5a via the interlocking mechanism 24. As a result, as shown in FIG. 2 (a). , A plurality of originals G inserted between the front and rear paper separating rollers 5a and 5b and the elastic bodies 6 and 6 are automatically misaligned in the paper feeding direction A to be separated one by one. be able to.

In this case, since the planetary gear mechanism 21 having a simple structure and low cost is used, the manufacturing cost can be reduced as compared with the conventional automatic paper feeder using the one-way clutch which is complicated and expensive. be able to. Further, since the paper separating rollers 5a and 5b and the elastic bodies 6 and 6 are provided in a front and rear pair along the paper feeding direction, a plurality of originals G are subjected to a separating action in two front and rear steps, and a pair of upper and lower sheets are provided. It is possible to reliably feed the originals one by one between the paper take-in rollers 5c. Further, since the pulleys 24a, 24b and the endless belt 24c are used as the interlocking mechanism 24 for interlocking the front and rear paper separating rollers 5a, 5b, it is possible to surely interlock the front and rear paper separating rollers 5a, 5b. In addition to being able to do it, the configuration is simple and the production cost can be reduced.

The originals separated one by one as described above are automatically sandwiched by the pair of upper and lower paper take-in rollers 5c while being sandwiched between the paper separating rollers 5a and 5b and the elastic bodies 6 and 6. Will be forwarded to. In this case, a large pulling force acts on the document G due to the difference in rotation speed between the pair of upper and lower paper take-in rollers 5c and the front and rear paper separating rollers 5a and 5b, and the pulling force rotates the paper separating rollers 5a and 5b. When the speed increases, the meshing state between the planetary gear 21b and the front driven gear 23 cannot be maintained, and the planetary gear 21b is automatically separated from the front driven gear 23 as shown in FIG. 2 (b). The paper separating rollers 5a and 5b are spun at the same speed as the paper take-in roller 5c, so that the document G can be fed smoothly.

In the above-described embodiment, the automatic sheet feeder of the facsimile machine is described as an example, but the invention is not limited to this, and the invention can be applied to the automatic sheet feeder of a copying machine, for example. Further, although the pulleys 24a and 24b and the endless belt 24c are used as the interlocking mechanism 24, other than this, for example, a gear mechanism may be used.

[0024]

[Effect of device]

 According to the first aspect of the present invention, since the planetary gear mechanism having a simple and inexpensive structure is used as the means for interlocking and connecting the paper take-in roller and the paper separating roller, the conventional structure is complicated and expensive. The manufacturing cost can be reduced as compared with the automatic paper feeder using the directional clutch.

According to the second aspect of the present invention, the interlocking connection between the paper take-in roller and the paper separating roller and their cancellation can be automatically performed smoothly by utilizing the revolution and rotation of the planetary gears. .

According to the third aspect of the invention, the paper separating roller and the elastic body are provided in a front and rear pair along the sheet feeding direction, and both the front and rear paper separating rollers are interlocked and coupled by the interlocking mechanism. A plurality of sheets of paper inserted between the paper separating roller and the elastic body are subjected to the separating action in two steps in the front and rear, and the paper can be reliably supplied one by one between the pair of upper and lower paper taking rollers.

According to the invention of claim 4, the interlocking mechanism comprises a pair of pulleys provided at the ends of the front and rear paper separating rollers, and an endless belt wound around the pulleys. , The front and rear paper separating rollers can be reliably interlocked, and the construction is simple and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an automatic paper feeder in a facsimile apparatus according to an embodiment of the present invention.

FIG. 2A is a schematic explanatory view showing a state in which the paper take-in roller and the paper separating roller are interlockingly connected by a planetary gear mechanism;
(B) is a schematic explanatory drawing which shows the state which canceled the same interlocking connection.

FIG. 3 is a vertical sectional view of the facsimile apparatus.

FIG. 4 is a schematic explanatory view showing a conventional example.

[Explanation of symbols]

 5a Paper Separation Roller 5b Paper Separation Roller 5c Paper Intake Roller 6 Elastic Body 21 Planetary Gear Mechanism 21a Sun Gear 21b Planetary Gear 23 Driven Side Gear 24 Interlocking Mechanism 24a Pulley 24b Pulley 24c Endless Belt G Original (Paper)

Claims (4)

[Scope of utility model registration request] 1. A paper separating roller, an elastic body in contact with the paper separating roller, and a pair of upper and lower paper take-in rollers are arranged at a predetermined distance in the paper feeding direction. The body separates a plurality of papers supplied between them by shifting the position slightly back and forth along the paper feeding direction, and receives the papers that have passed between the paper separation roller and the elastic body by the separating action. In an automatic paper feeding device such as a facsimile machine which is sandwiched by a pair of upper and lower paper take-in rollers to feed the paper, the paper take-in roller and the paper separating roller are interlockingly connected, and the rotation speed of the separating roller is An automatic paper feeding device such as a facsimile machine, which is provided with a planetary gear mechanism that cancels the interlocking linked state when the paper is raised. 2. The planetary gear mechanism meshes with a sun gear fixed to an end of a paper take-in roller, and receives the rotational force of the sun gear at the end of the paper separating roller. 2. An automatic paper feeder such as a facsimile machine according to claim 1, comprising a planetary gear which is pressed against the fixed driven gear and meshes with the driven gear. 3. The paper separating roller and the elastic body are provided as a front and rear pair along the sheet feeding direction, and both the front and rear paper separating rollers are interlockingly connected through an interlocking mechanism. An automatic paper feeder such as the facsimile machine described in 2. 4. The facsimile machine according to claim 3, wherein the interlocking mechanism comprises a pair of pulleys provided at the ends of the front and rear paper separating rollers, and an endless belt wound around the pulleys. Automatic paper feeder such as machine.