JPH09146437A - Copying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an image shift in the other recording paper caused by the fact that the read of a document content is not performed by the portion of the distance from the carrying start position of one document to the read position. SOLUTION: A drive transmitting means D for transmitting the rotation of the same driving motor M to a document carrying means A and a recording paper carrying means B has a clutch. A pulse motor is used as the driving motor M to count the pulse number, or a sensor is provided to detect that the top of a document reaches a read position by the sensor, whereby the clutch is connected according to the read starting timing by a reading means, and the rotation of the driving motor M is transmitted to the recording paper carrying means B to start the carrying the recording paper.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine for making a copy of a document. In particular, the present invention relates to a document-conveying-type copying apparatus that conveys a document to read the content of the document without moving the reading optical system, and also conveys a recording paper to record the read content on the recording paper.

[0002]

2. Description of the Related Art Conventionally, a copying machine of this type is provided with a drive motor for operating a document transporting means for transporting a document and a recording paper transporting means for transporting a recording sheet. is there.

However, in this case, there is a problem that the device becomes large and the cost becomes high because two drive motors are required.

In view of the above, there is a conventional copying machine of the original carrying type, for example, one in which the original carrying means and the recording paper carrying means are operated by using the same drive motor as shown in FIG. is there.

The copying machine includes an endless belt 1
Is provided with a document conveying means E which is stretched between the driving roller 2 and a driven roller (not shown) in the document conveying direction a. On the other hand, above the drive roller 2, a recording paper conveying means F including a platen 3 and the like is provided. The platen 3 is provided with a thermal head 4 which is pressed against the platen 3 so as to be able to come into contact with and separate from the platen 3. Further, the reading means H is provided on the upper side of the endless belt 1, and the traveling roller 5 is attached to the endless belt 1 on both front and rear sides of the reading means H.
Press a and 5b. Further, a drive motor 6 is provided in front of the drive roller 2, and the same drive force of the drive motor 6 is transmitted to the endless belt 1 via the timing belt 7 and also transmitted to the platen 3 via the timing belts 7 and 8. The configuration is

When making a copy, the original G is placed on the endless belt 1 and the leading end of the original G is abutted against the traveling roller 5b to be set at the original conveyance start position X, while the recording paper P is placed on the paper feed tray 9. Then, the tip is abutted between the platen 3 and the thermal head 4 to set. After setting, drive the drive motor 6 by operating the copy switch (not shown).
Is driven, the endless belt 1 is rotated to convey the original G, the contents of the original are read by the reading means H at the reading position Y, while the platen 3 is rotated to convey the recording paper P, and the recording paper P is conveyed. The read contents were recorded in.

[0007]

However, conventionally, in such a copying apparatus, the reading position Y is set after the start of conveyance of the document G.
Since the reading means H has not read the contents of the original document during the distance L until the arrival at, the image is not recorded on the recording paper P during that time. As a result, for example, as shown in FIG. 7, there is a problem in that the read content is recorded on the recording paper P with the distance L shifted from the actual document content in the transport direction a.

Therefore, an object of the present invention is to prevent the occurrence of such an image shift on the recording paper in the above copying apparatus.

[0009]

Therefore, the present invention described in claim 1 has, for example, the following features:
The original G and the recording paper P are set at the conveyance start positions X and X ', and the same driving motor M operates the original conveyance means A and the recording paper conveyance means B to convey the original G by the original conveyance means A. In the copying apparatus in which the document content of the document G is read by the reading means C, the recording paper P is conveyed by the recording paper conveying means B and the read content is recorded on the recording paper P, the reading start timing by the reading means C And a clutch for connecting the drive of the drive motor M to the recording paper conveying means B.

When making a copy, the drive motor M
Is driven to operate the document conveying means A, convey the document G, and read the document content of the document G by the reading means C. At the same time as the reading start timing of the reading means C, the clutch is engaged and the drive motor M is driven. Is transmitted to the recording sheet conveying means B, the conveying means B is operated, and the recording sheet P starts to be conveyed.

According to a second aspect of the present invention, for example, as shown in the following embodiment, in the copying apparatus according to the first aspect, the detection means 50 for detecting the recording paper P set at the transport start position X '. And a control means for driving the drive motor M to rotate the conveying roller such as the platen 32 when the recording paper P is detected by the detection means 50 and winding the leading end of the recording paper P by the rotation. Characterize.

When making a copy, the recording paper P is set at the transport start position X '. Then, when the recording paper P is detected by the detection means 50, the drive motor M is driven to rotate the conveyance roller, and the leading end of the recording paper P is wound by the rotation.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows the external structure of a personal copy board according to the first aspect of the invention.

Reference numeral 10 in the drawing indicates the case of the copy board. The case 10 is formed in a box shape that is relatively thin and slightly long, has a long window 11 on the front side, and is arranged along the length direction of the window 11 to hold a handle / writing instrument holder 12
A belt feed switch 13 and a copy switch 14 are provided. Further, the cover 15 is provided on one side in the length direction of the case 10.
Is provided. The cover 15 is formed to be long in the width direction of the case 10, and has an elongated manual sheet feeding port 15a and a sheet discharging port 15b arranged side by side on the upper surface thereof.

As will be described later in detail, the copy board is provided with a document conveying means A in the case 10, and the cover 1
In FIG. 5, there are provided a recording paper conveying means and a reading means, which are denoted by reference characters B and C in FIG. 4, respectively. Further, inside the cover 15, there are provided a drive motor indicated by reference numeral M in FIG. 1 and a drive transmission means D for transmitting the drive force of the drive motor M to the document conveying means A and the recording sheet conveying means B.

The document conveying means A is provided with a frame (not shown) below the window 11, and a driving roller 21 and a driven roller 22 are provided at the front and rear of the frame in the longitudinal direction (left and right in FIG. 4). The shafts are arranged in the width direction, both ends of the roller shafts are rotatably supported by the frame, and an endless belt 25 is stretched between the rollers 21 and 22. Then, the driven roller 22 is urged by a tension spring (not shown) to move the endless belt 25 to both rollers 21, 22.
It will be stretched between them.

The endless belt 25 is made of a polymer plastic material such as polyester, which can be written on the surface with an appropriate marker while the written contents can be easily erased. Then, the inner surface of the tension side portion 25a is
The backing plate portion of the frame is used for backing, and the front side of the backing portion is exposed from the window 11 to the outside as shown in FIG. 5 to form a flat handwriting surface.

On the other hand, the recording paper conveying means B shown in FIG. 4 in the cover 15 is provided above the driving roller 21 in parallel therewith and rotatably provided with a platen 32 also serving as a conveying roller. Further, below the above-mentioned manual paper feeding port 15a, the paper feeding tray portion 34 is provided with its tip inclined toward the lower side of the platen 32.

A thermal head 33 is provided on the lower side of the platen 32, and the thermal head 33 is provided so as to be able to come into contact with and separate from the platen 32 by a contacting / separating mechanism (not shown).

The reading means C includes a reading sensor 26 above the front side of the endless belt 25. Also, the reading sensor 2
A pair of running rollers 2
8, the roller shafts of the traveling rollers 27 and 28 are rotatably held by the left and right arms 19.
Then, the case 26a of the reading sensor 26 is biased from above by the compression coil spring 31, and the traveling rollers 27, 28 are pressed against the tension side portion 25a of the endless belt 25.

The drive motor M and the drive transmission means D are arranged inside the cover 15 beside the drive roller 21 and the platen 32 of the endless belt 25 as shown in FIG. As the drive motor M, for example, a pulse motor that can be driven in the reverse direction is used.

The drive transmission means D has a platen gear 35 provided at one end of a platen shaft 32a of the platen 32, and a belt transfer gear 36 and a belt transfer pulley 37 provided at one end of the roller shaft 21a of the drive roller 21. And
The belt conveying gear 36 and the platen gear 35 are meshed with each other via an intermediate gear 38 between them. The intermediate gear 38 is provided at one end of a gear shaft 39 whose both ends are supported by shaft support members (not shown). A reduction gear 40 is provided at the other end on the gear shaft 39, and a belt conveyance pulley 41 is provided between the reduction gear 40 and the intermediate gear 38. Then, the belt transport pulley 41
-Hang the timing belt 42 between 37. Further, the reduction gear 40 meshes with a transmission gear 44 coaxial with the pulley 43 supported by the cover 15. And the pulley 43
The timing belt 46 is stretched between the motor pulleys 45 of the drive motor M.

Although not shown, the drive transmission means D is in one direction between the platen gear 35 and the platen shaft 32a, between the belt transfer gear 36 and the roller shaft 21a, and between the belt transfer pulley 37 and the roller shaft 21a. Install a clutch. When the rotation in the direction of the arrow m shown by the dotted line in FIG. 1 is transmitted to the platen gear 35, the one-way clutch is engaged to transmit the rotation of the platen gear 35 to the platen shaft 32a. Further, when the rotation in the direction of arrow m is transmitted to the belt conveyance gear 36 or the belt conveyance pulley 37, the one-way clutch is engaged to transmit the rotation of the belt conveyance gear 36 or the belt conveyance pulley 37 to the roller shaft 21a. .

By the way, in the above-mentioned copy board, a control means (CPU) for controlling the whole is provided in an electric part (not shown).
In addition to the copy switch 14, the control means electrically connects the drive motor M that receives and drives a pulse signal from the control means, the reading means C, the thermal head 33, and the like.

By the way, in the invention described in claim 2, for example, as shown in FIG. 4, the above-mentioned paper feed tray portion 34 is provided with the detection means 50 for detecting the recording paper P. Detection means 5
For example, a micro switch is used as 0. Then, before the copy switch 14 is turned on, when the detection means 50 detects the recording paper P, the control means drives the drive motor M for a certain period of time.

The copy board described above is used, for example, in a state of being placed on a table or the like. First, when making a copy of a document, as shown in FIG. The paper P is put in, the leading end thereof is abutted between the platen 32 and the thermal head 34, and the paper P is set at the transport start position X ′ on the paper feed tray unit 34.

Then, as shown in FIG.
Is turned on to detect the recording paper P, and the control means drives the drive motor M for a predetermined time to feed the original G and the recording paper a little. In that case, the drive motor M is driven, and as shown in FIG. 1, the timing belt 46 is rotated in the direction of the solid line arrow to rotate each transmission member of the drive transmission means D in the direction of the solid line arrow. Then, in that rotation direction, the platen gear 3
Since the one-way clutch 5 and the one-way clutch of the belt transport gear 36 are activated, the driving force of the drive motor M is transmitted to the platen 32 and the drive roller 21, rotating the platen 32 and sending the endless belt 25. And
By rotating the platen 32, the leading end of the recording paper P is sandwiched between the platen 32 and the thermal head 33. Then, as shown in FIG. 4, the original G is placed on the endless belt 25, and the leading end of the original G is abutted against the traveling roller 28, and the original is placed at the conveyance start position X at a predetermined reference such as a center reference or one side reference. set.

Thereafter, as shown in FIG. 3, when the copy switch 14 is turned on, the drive motor M is reversely driven by the control means, and as shown in FIG. 2, the timing belt 46 is reversed from that in FIG. By rotating in the direction, each transmission member of the drive transmission means D is reversely rotated in the direction of the chain line arrow in FIG. Then, in that rotation direction, the one-way clutch of the platen gear 35 is not engaged, and the platen gear 35 idles, so that the driving force of the drive motor M is not transmitted to the platen 32, and the recording paper P is not yet delivered. On the other hand, although the one-way clutch of the belt transfer gear 36 is not provided, the one-way clutch of the belt transfer pulley 37 on the same axis is connected. Therefore, the driving force of the drive motor M is transmitted to the drive roller 21 via the clutch. Endless belt 25
2 in the direction of arrow a in FIG.
Then, the traveling rollers 27 and 28 are rotated to send out the document G.

Then, as shown in FIG. 4, when the control means C counts the number of drive pulses by which the document G advances the distance L from the conveyance start position X to the reading position Y, that is, the reading by the reading means C. The drive direction of the drive motor M is switched as shown in FIG. 3 in accordance with the start timing. Then, as shown in FIG. 1, each transmission member of the drive transmission means D is rotated again in the direction of the solid arrow. Then, in this rotation direction, the one-way clutch of the belt conveying gear 36 is engaged, so that the driving force of the driving motor M is transmitted to the driving roller 21 as it is and the endless belt 25 is continuously fed. On the other hand, since the one-way clutch of the platen gear 35 is also connected, the same driving force of the drive motor M is transmitted to the platen 32. Then, the conveyance of the recording paper P is started at the same time when the reading of the original G is started.

Therefore, the contents of the original G are read by the reading means C.
While being read by, the read contents are recorded on the recording paper P by the thermal head 34. Then, the recording paper P after recording is discharged upward from the paper discharge port 15b, while the document G after reading is discharged forward from a document discharge port (not shown).

The copy board can also be used as a handwriting board. In that case, a drawing tool such as a water-based pen is used to directly draw a picture or character on the handwriting surface. The handwritten content can be erased by wiping the handwriting surface with a board wipe as appropriate. Then, when making a copy of the handwritten content, the copy switch 14 described above is turned on to drive the endless belt 25 in the direction a, and while the handwriting surface is fed, the handwritten content is similarly read by the reading means C, and the read content is read. Is recorded on the recording paper P.

By the way, in the above-described embodiment, the conveyance start timing of the recording paper P is adjusted to the reading timing of the original G based on the number of drive pulses of the drive motor M. By detecting that the leading edge of the document has reached the reading position using
It is also possible to make the conveyance start timing of the recording paper coincide with the reading timing of the document.

The inventions described in claims 1 and 2 are
The present invention is not limited to the above-mentioned personal copy board, and can naturally be applied to other document-conveying copy machines, facsimiles, and the like.

[0034]

Therefore, according to the first aspect of the present invention, the clutch is engaged in synchronization with the reading start timing of the reading means, and the driving of the drive motor is transmitted to the recording paper feeding means to start the feeding of the recording paper. Therefore, it is possible to prevent the document contents from being read by the distance from the conveyance start position of one document to the reading position as in the conventional art, and to prevent the image misregistration on the other recording paper due to that. You can

According to the second aspect of the present invention, when the recording sheet is set at the conveyance start position and the recording sheet is detected by the detecting means, the conveying roller is rotated so that the leading end of the recording sheet is wound. Since the recording paper is held, it is possible to prevent the recording paper from being displaced or dropped from the transport start position, especially in the case of a wall-mounted copying machine.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a drive transmission system provided in a copy board of the invention described in claim 1 in a state in which a drive motor is driven in one direction.

FIG. 2 is a perspective view similar to FIG. 1, showing the drive transmission system in a state in which a drive motor is driven in one direction.

FIG. 3 is a timing chart showing drive timings of an endless belt and a platen in the copy board.

FIG. 4 is a schematic configuration diagram showing an internal mechanism of the copy board.

FIG. 5 is an external perspective view of the copy board.

FIG. 6 is a schematic configuration diagram showing an internal mechanism of a conventional copying apparatus.

FIG. 7 is an explanatory diagram showing a state where a document content on a document and an image on a recording sheet are misaligned.

[Explanation of symbols]

 32 platen 50 detecting means A document transporting means B recording paper transporting means C reading means G document X document transporting start position X'recording paper transporting start position

Claims (2)

[Claims] 1. An original document and a recording sheet are set at respective conveyance start positions, the same drive motor operates the original document conveying means and the recording sheet conveying means, the original document conveying means conveys the original document, and the original contents of the original document are conveyed. In the copying machine which conveys the recording paper by the recording paper conveying means and records the read contents on the recording paper while the reading means reads the recording paper, the drive motor is driven by connecting the recording paper at the reading start timing by the reading means. A copying machine having a clutch for transmitting the recording paper to the conveying means. 2. A detecting means for detecting the recording paper set at the conveyance start position, and when the detecting means detects the recording paper, the drive motor is driven to rotate the conveying roller, and the rotation causes the leading end of the recording paper. The copying apparatus according to claim 1, further comprising a control unit that winds up.