JPH07251981A - Sheet material feeding device and facsimile device having the device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of unevenness in a position relation between a document and reading position during switching of drive by a method wherein a distance between the rear end of a preceding document and the forward end of a subsequent document determined by a document conveying means is increased to a value higher than a distance between a reading means and a detecting means for the forward end and the rear end of a document. CONSTITUTION:When two documents G1 and G2 are set through a document insertion slot, the document enters a gap between a separation roller 16a and a pressure contact piece 16b. When the separation roller 16a is rotated in the direction of an arrow mark, only one of the documents G1 on the side making contact with the separation roller 16a is conveyed. When the document G. is moved to a conveyance roller 17a, the separation roller 16a follows the document G1. When the rear end of the document G1 is separated away from a nip part between the separation roller 16a and the pressure contact piece 16b, the separation roller 16a is rotated in a document conveying direction and a second document G2 is fed. A specified distance Ld between the rear end of the first document G1 and the forward end of the second document G2 is provided. The distance Ld is set to a value higher than a distance between a document forward and rear end sensor 31 and the reading position 19a of a photoelectric conversion element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material feeding apparatus having a built-in mechanism for feeding an original or recording sheet of a predetermined size, and a facsimile apparatus equipped with this apparatus.

[0002]

2. Description of the Related Art In recent years, facsimile machines have become popular for general household use, and higher level of added value is required. In response to such demands, in particular, a facsimile machine capable of automatically feeding a cut sheet (plain-sized plain paper or the like) in place of the heat-sensitive recording roll sheet, which has been the mainstream in the past, is becoming mainstream.

Among the components of a facsimile apparatus using such a cut sheet, a motor driven structure is a document conveying means for conveying a document to a reading section, and an image is recorded on the sheet. There are a recording means and a paper feeding means for separating the sheets one by one and feeding them to the recording means. In order to drive each of these means in a prescribed manner,
In a conventional facsimile apparatus, a drive motor (stepping motor), a drive circuit, a drive power supply device, etc. are provided in each of the document conveying means, the recording means, the paper feeding means, etc., and the drive control is generally performed individually. is there.

[0004]

However, according to the structure in which the drive motors are provided in the document conveying means, the recording means, and the paper feeding means, respectively, as described above, the number of drive motors and the number of motors used are relatively high. As a result of an increase in the number of drive circuits and power sources, there is a problem in that the cost is increased and space is required, which hinders size reduction.

Therefore, a configuration is conceivable in which a switching mechanism for transmitting / disconnecting power is used to selectively drive the document conveying means and the paper feeding means by a common drive motor. According to this method, cost reduction and downsizing of the device can be achieved, but backlash occurs during drive switching by the switching mechanism, and the following inconveniences occur due to the influence of this backlash.

That is, due to the influence of the backlash,
In the reading system, the positional relationship between the original and the reading position varies, and reading starts before the original reaches the reading position, or after the original reaches the reading position, the reading starts after a while. As a result, there is a problem that the read image has a missing portion. Therefore, when the read image is copied by its own recording system or transmitted to the recording system of another machine, there is a problem that an image is recorded on a recording sheet in the recording system, and a missing portion is generated.

Further, if drive switching is performed by the switching mechanism during image reading, the read image also has a seam due to the influence of the backlash, and thus the recorded image has a seam, which deteriorates the image. There was a problem of being lost.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to prevent variations in the positional relationship between the document and the reading position due to the influence of backlash that occurs during drive switching. To prevent image deterioration.

[0009]

A typical structure of the present invention for achieving the above object is to provide a reading means for reading an image of an original, an original conveying means for conveying the original to the reading means, and a front and rear side of the original. A document front / rear edge detecting unit for detecting an edge, a document separating / conveying unit capable of separating and conveying a plurality of documents one by one in sequence and separating the conveyed documents from each other by a predetermined distance or more, and a recording sheet. A recording unit configured to record a predetermined image, a recording sheet conveyance unit configured to convey a recording sheet to the recording unit, a document conveyance unit and the recording sheet conveyance unit being selectively driven by a common drive motor. Control means for transporting the original and the recording sheet respectively, and the distance between the original and the original determined by the original separating / conveying means is determined by the reading position of the reading means and the front of the original. It is characterized in greater than the distance between the detection position of the detection means.

[0010]

According to the above structure, the original conveying means and the recording sheet conveying means are selectively driven by a common drive motor, and the originals and originals for separating and conveying a plurality of originals one by one And a plurality of originals by setting the distance between the originals to be larger than the distance between the original leading edge and trailing edge detection position and the image reading position. When scanning, the document of the next page will not reach the document leading edge and trailing edge detection position when the image reading of the document of a certain page is completed.At that time, the reading operation is interrupted and the recording sheet conveyance operation is stopped. By adding a control means for performing the reading operation again after that, detection of the leading edge of the document, conveyance to the reading position, reading,
It is possible to perform a series of reading operations of detecting the trailing edge of the document and transporting the trailing edge to the reading position. Even during the reading operation of multiple documents, even if the recording sheet transport operation is performed between each page of the document, A stable original reading area can be obtained.

[0011]

【Example】

[First Embodiment] An embodiment of a facsimile apparatus to which the present invention is applied will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the main configuration of the facsimile apparatus according to the first embodiment, showing the case where a serial type ink jet recording system is adopted as the recording means. FIG. 2 is an operation explanatory view of the facsimile machine, and FIG. 3 is an external perspective view showing an arrangement state of electric / electronic circuit boards of the facsimile machine.

{Overall Description of Facsimile Apparatus} First, the overall configuration of the facsimile apparatus will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, this facsimile apparatus has a sheet feeding system A for feeding recording sheets S one by one, a recording system B as a recording device, and a reading system C for reading an image written on a document G. , And the operation unit D.

(Paper Feeding System) This paper feeding system A feeds a recording sheet S placed in a paper feeding cassette 1 by a paper feeding roller 3 and a separation pad 4 which is in pressure contact with the recording sheet S. The sheets are separated one by one in the paper section and then fed downstream, and further fed downstream by the feed rollers 5a and 5b (in the direction of arrow a in the drawing) and fed to a recording system B described later.

In the vicinity of the recording system B for recording on the recording sheet S thus conveyed, a photo sensor / micro for detecting the position of the recording sheet S by detecting the front and rear edges of the recording sheet S. A sheet front and rear end sensor 6 including a switch and the like is provided.

On the other hand, the paper feed cassette 1 is detachably provided as shown in FIG. 2 through an opening 7e provided in the front surface 7a of the apparatus main body 7 having a gradually inclined transverse sectional shape as shown in FIG. ing. Further, the paper feed roller 3, the separation pad 4, the feed rollers 5a and 5b, and the sheet front / rear edge sensor 6 are provided for respective mounting portions (not shown) formed in the apparatus main body 7.

(Recording system) Next, the recording system B is supplied with an image signal transmitted from another apparatus, an image signal transmitted from a reading system C described later, or predetermined data output from a computer or the like. An image is recorded on the recording sheet S supplied from the paper system A, and more specifically, the platen roller 8 provided in the recording system B conveys the recording sheet S to the downstream side to generate an image signal. Alternatively, the ink droplets ejected from the head cartridge 9 in accordance with predetermined data are attached to the recording sheet S to form one line of an image, and then the sheet is appropriately conveyed.

A recording sheet S on which a predetermined image is recorded
Is further conveyed in the direction of arrow a, further conveyed downstream by the discharge rollers 10a and 10b, discharged to the outside of the apparatus, and stacked and discharged on the sheet tray 11. Here, recording system B
The platen roller 8 and the discharge rollers 10a and 10b are provided on the mounting portion (not shown) of the apparatus main body 7, respectively.

In the head cartridge 9 which performs the recording operation as described above, the recording cover 12 is opened in the direction of arrow c shown in FIG. 2 and rotated to a predetermined position (two-dot chain line in the figure), so that the direction of arrow d in the figure is obtained. It is configured to be detachable from the apparatus main body 7 by moving to.

(Reading System) On the other hand, the reading system C irradiates the original G shown in FIG. 1 with light, converts the reflected light into an electric signal, and performs each operation required for the facsimile machine. Depending on the mode, it is transmitted to another device or to the recording system B of its own described above.

That is, one or a plurality of originals G are placed on the original placing table 14 and the original tray 15, and the original G is separated into one sheet by the separation roller 16a and the pressure contact piece 16b which is pressed against the separation roller 16a. To the downstream side (direction of arrow b in the figure) from the original G
Is appropriately conveyed by the conveying rollers 17a and 17b and the discharge rollers 18a and 18b, and discharged from the opening 7e of the apparatus main body 7 to the outside.

While the document G is being conveyed in this way, the photoelectric conversion element 19 such as a contact sensor and the white roller 20 that faces the reading position 19a of the photoelectric conversion element 19 and defines the background at the time of reading. The image reading unit is configured to read image information, and the image signal is transmitted to its own recording system B in the copy mode and to the recording system of another machine in the transmission mode. Is configured to.

Further, in the vicinity of the upstream side of the separation roller 16a,
A document presence / absence sensor 30 for detecting the presence / absence of a document and determining whether or not the document is in a readable state is further provided with a conveyance roller
A document including a photosensor / micro switch or the like for detecting the leading and trailing ends of the document G between the photoelectric conversion elements 19 and 17a and 17b and setting the start / end timing of the reading operation by the photoelectric conversion element 19. A front and rear end sensor 31 is provided.

The original placing table 14, the original tray 15, the separating roller 16a, the conveying roller 17a, the discharge roller 18a, the photoelectric conversion element 19, and the white roller 20 are provided at the mounting portion (not shown) of the apparatus main body 7, respectively. There is.

(Operation Unit) Next, the operation unit D is for performing operations such as a mode switching operation, a copy operation, a transmission operation, a printer operation, etc., and is provided in the front portion of the apparatus with an inclination as described above. On the other hand, keys (not shown) corresponding to various operations are provided.

The operation section D is provided above the document conveying mechanism in the reading system C, and with respect to the apparatus body 7.
It is configured to be rotatable and openable / closable in the direction of arrow e shown in FIG. Although not shown, one end of the operation unit D is equipped with a telephone (handset) for transmitting / receiving.

According to the schematic configuration described above, the components essential to the facsimile apparatus are disposed in the apparatus body 7 without waste, and the replacement work of the head cartridge 9 and the access to the reading unit and the feeding cassette 1 are performed. It is designed for easy replacement.

Incidentally, FIG. 3 is an external perspective view showing an arrangement state of electric / electronic circuits of the above-mentioned device. As shown in FIG.
The system board 21a of this apparatus is provided on the bottom surface 7g of the apparatus body 7, and the power supply unit board 21b is provided on the right side of the apparatus. Further, a board 21c for controlling the operation section D, a relay board 21d, a board for controlling the telephone and the telephone line.
21e, substrate 21f on which printer interface 21f1 is placed
Are respectively provided at the positions shown in the figure. By providing each electronic circuit board as described above, it is possible to easily take measures against heat generation, maintenance and inspection.

(Structure of Driving System) Next, the structure of the driving system of this apparatus will be described with reference to the schematic isometric schematic diagram of FIG. In this figure, the drive source is the paper feed system A.
The sheet feeding / reading motor 32 for driving the reading system C, the recording motor 34 for driving the cleaning device 40 for conveying the sheet of the recording system B and the head of the head cartridge 9, and the head cartridge 9. A carriage motor 35 that moves in the scanning direction is provided as shown in the figure, and a total of three stepping motors are provided in the entire apparatus.

Among the above stepping motors, the power of the paper feeding / reading motor 32 is in a state of being connected to either the paper feeding system A or the reading system C by the switching arm 33 swinging depending on the rotation direction. It is composed. As shown in FIG.
On the switching arm 33, a switching gear 33a that swings together with the switching arm 33 is rotatably attached to a shaft 33c fixed to the switching arm 33, while for the switching arm 33, the switching gear 33a is attached to the shaft 33c. Lateral pressure is applied by the coil spring 33d compressed by the retaining ring 36, and a frictional force between the switching arm 33 and the switching gear 33a is generated to generate a certain weak rotational load.

The switching arm 33 and the rotation center gear 33b are rotatably arranged on a shaft 38 fixed to a drive base 37, and the switching gear 33a and the rotation center gear 33b have a constant interval and always mesh with each other. It is in a state. With the above configuration, when rotation is applied to the rotation center gear 33b by the paper feeding / reading motor 32, the switching gear 33a and the switching arm 33 are relatively stopped by a rotational load, and as a result, the switching arm 33b is stopped.
The 33 swings around the rotation center gear 33b in the same direction as the rotation direction. Since the switching arm 33 is prevented from swinging by meshing the other gear with the switching gear 33a, the switching gear 33a is rotated by the rotation of the rotation center gear 33b to transmit power. That is, by rotating the sheet feeding / reading motor 32 in the direction of arrow g in the figure, the reading system C is driven to drive the gears w1 to w11, while conversely, when it is rotationally driven in the direction of arrow h. Paper system A
Is driven to drive the gear pulley wp1 to drive the belt T1.
Via the gear pulley wp2 and the gear w meshed with this.
20 to w22 are driven to rotate the paper feed roller 3 described above.

On the other hand, also in the recording system B, a similar power switching mechanism is built in the cleaning device 40, and by rotating the recording motor 34 in the direction of the arrow i in the drawing, the gears w23 to w25 are passed. By driving the cleaning device 40 and rotating in the direction of arrow j in the figure, the gear w
The recording sheet S is conveyed and driven through 23 to w26.

Next, the carriage motor 35 is configured to drive the timing belt T2 fixed to the carriage (not shown) of the head cartridge 9 via the pulleys wp3 and wp4.
Is rotationally driven in the direction of arrow k, the cartridge 9 moves leftward, and conversely, the cartridge 9 moves rightward in the direction of arrow l. Along with this movement, an image is recorded while performing a predetermined inkjet recording operation.

Here, the peripheral speed Vf of the feed rollers 5a and 5b for conveying the recording sheet S and the above-mentioned paper feed roller 3
The peripheral speed Vp is set to Vf> Vp, while the one-way clutch 3a is provided between the paper feed roller 3 and the drive shaft fixed to the gear w22 described above. When being conveyed, the recording sheet S separated and fed by the feed roller 3 is fed to the feed rollers 5a,
At the time when the conveyance by 5b is started, the paper feed roller 3 is adapted to simply follow the recording sheet S. As a result, the recording sheet S is transported by the driving of the recording system B even if the driving of the paper feeding system A is stopped at the time when the transportation by the feed rollers 5a and 5b is started.

Also in the reading system C, as in the recording system B, the conveying rollers 17a and 17b for conveying the document G, the discharge rollers 18a and 18b, the peripheral speed Vh of the white roller 20 and the peripheral speed of the separating roller 16a. Vb sets the gear ratio of the reading system gears w9, w10, w11 so that Vh> Vb, and provides a one-way clutch 16c between the separation roller 16a and the drive shaft fixed to the gear w11. The one-way clutch
16c and the separation roller 16a have a play (play amount) in the rotational direction, that is, the projection 16c1 of the one-way clutch 16c and the recess 16a1 of the separation roller 16a.
Constitutes a mechanical timer.

The interval between the originals determined by the original conveying system (the interval between the trailing edge of the preceding original and the leading edge of the following original) will be described with reference to FIG.

As shown in FIG. 6A, when two originals G ₁ and G ₂ are set from the original insertion port, the separation roller
It enters between the wedge-shaped parts formed by 16a and the pressure contact piece 16b. Here, the friction coefficient μ _A between the separation roller 16a and the original G, the friction coefficient μ _B between the pressure contact piece 16b and the original G,
The friction coefficient μ _C between the originals G is set such that μ _A > μ _B > μ _C , and when the separating roller 16a is rotated in the direction of the arrow in the figure, the separating roller 16a having the largest friction coefficient is obtained. Only one original (the original G _{1 in} this figure) on the side in contact with the sheet can be conveyed.

When the sheet feeding / reading motor 32 is driven to drive the reading system C, the gears w1 to w11 are rotated and the conveying roller 17 is driven.
a, the discharge roller 18, and the white roller 20 rotate in the document conveying direction (direction of arrow b in FIG. 1). At the same time, the drive shaft fixed to the gear w11 also rotates in the transport direction, the one-way clutch 16c locks and follows the drive shaft, and the projection 16c1 of the one-way clutch 16c causes one end surface of the recess 16a1 of the separation roller 16a to move. The pushing force is transmitted to the separating roller 16a, and the separating roller 16a also rotates in the conveying direction.
The original document G ₁ is selectively conveyed.

As shown in FIG. 6B, the separation roller 16a
When the document G ₁ is rotated by a certain amount on the conveying roller 17a, the peripheral speed Vh of the conveying roller 17a is faster than the peripheral speed Vb of the separating roller 16a, so that the separating roller 16a follows the document G ₁ . Then, the rotation speed of the separation roller 16a becomes faster than the rotation speed of the one-way clutch 16c, so that the one-way clutch 16c that has transmitted the driving force is transmitted.
The projection 16c1 and the end surface of the recess 16a1 of the separation roller 16a are separated from each other, and the gap therebetween is gradually widened.

As shown in FIG. 6C, when the gap is widened, the projection 16c1 of the one-way clutch 16c abuts on the other end surface of the recess 16a1 of the separation roller 16a. Then, the one-way clutch 16c itself follows the separating roller 16a, and the one-way clutch is more than the drive shaft.
Since 16c rotates faster, it is in a clutch-free state.

As shown in FIG. 6 (d), the first original G
_When the rear end of ₁ comes out of the nip portion between the separation roller 16a and the pressure contact piece 16b, the separation roller 16a stops. Then,
One-way clutch 16c that was in a clutch-free state
Locks again and begins to rotate with the drive shaft.

As shown in FIG. 6 (e), when the one-way clutch 16c rotates a certain amount, the separating roller 16a is rotated.
The projection 16c1 of the one-way clutch 16c, which was in contact with the other end surface of the recessed portion 16a1, is in contact with one end surface of the recessed portion 16a1 of the separation roller 16a in the same manner as in FIG. 6A, and the driving force is transmitted. Accordingly, the separating roller 16a rotates in the document conveying direction and sends out the _second document G2.

As shown in FIG. 6 (f), the first original G
_{As in the case of 1} , when the separation roller 16a is rotated again by a certain amount, the leading edge of the _second original G ₂ is applied to the transport roller 17a. At this time, the rear end of the _first document G ₁ is conveyed by a constant amount after leaving the separation roller 16a, and the front end of the second document G ₂ is caught by the conveyance roller 17a after the constant amount is conveyed. Therefore, a constant distance Ld is obtained between the rear end of the _first original G ₁ and the front end of the second original G ₂ . The distance Ld is determined by the reduction ratio (gear ratio of the gears w9 to w11) between the transport roller 17a and the separation roller 16a,
The recessed portion 16a1 of the separation roller 16a and the protrusion 16c1 of the one-way clutch 16c in the rotational direction can be freely set by changing the design (play amount). In this embodiment, the distance Ld is set to the original front / rear edge sensor 31 and the photoelectric conversion element.
It is set to be larger than the distance between the reading position 19a of 19 and the reading position 19a.

(Structure of Control System) Next, the structure of the control system for driving and controlling the above-mentioned parts will be described with reference to the block diagram of FIG.

In FIG. 7, reference numeral 41 is a control unit of the above-mentioned facsimile apparatus, which is a CPU 41a for controlling the entire apparatus,
ROM 41b storing various programs and various data,
The RAM 41c is used as a work area of the CPU 41a and temporarily stores various data such as the number of recorded sheets.

The control unit 41 includes the paper feed / read motor.
Motor drive circuits 42, 43, 44 for rotationally driving 32, the recording motor 34, and the carriage motor 35, respectively, are connected, and control signals from the control unit 41 are sent to the motor drive circuits 42, 43, 44, respectively. The motors 32, 34 and 35 are drive-controlled. Although the stepping motor is used as the drive motor in the present embodiment, the present invention is not limited to this and may be, for example, a DC motor or a servo motor.

The control section 41 is also connected to the recording sheet front and rear edge sensor 6, the document presence / absence sensor 30, and the document front and rear edge sensor 31 so that respective detection signals can be input.

(Example of Driving Control of Each Motor) Next, with reference to the timing chart of FIG. 8, the movement of each motor when two originals G are continuously copied in the facsimile apparatus having the above-described configuration will be described in detail. I will describe.

S1: When two originals G are set on the original placing table 14, the original presence / absence sensor 30 detects the presence of the original, and the copy or transmission becomes possible.

S2: When a copy start operation is performed from the operation unit D, the paper feed / read motor 32 rotates in the direction of the arrow h, and the paper feed roller 3 starts to rotate to start the paper feed operation. At the same time, the recording motor 34 also rotates in the direction of arrow j to rotate the feed rollers 5a and 5b and the platen roller 8 to convey the recording sheet S fed from the paper feeding system A.

S3: When the recording sheet front / rear edge sensor 6 detects the sheet front end, the recording sheet S can be conveyed only by driving the recording motor 34.
The drive of (paper feeding system A) is stopped.

S4: In S3, the front end of the recording sheet S with respect to the recording position is completed by conveying the recording sheet S by a certain amount after detecting the leading edge of the sheet, and the driving of the recording motor 34 is stopped. Further, the paper feeding / reading motor 32 is rotated in the direction of the arrow g to start the separation conveyance of the document G.

S5: The document front / rear edge sensor 31 detects the leading edge of the first document G.

S6: In S5, when the front end of the original G reaches the reading position 19a of the photoelectric conversion element 19 when the front end of the original G reaches the reading position 19a of the photoelectric conversion element 19 when the front end of the original G is conveyed after detecting the front end of the original. The signal is sent to the recording system B. Receiving the image signal, the recording system B rotates the recording motor 34 in the direction of the arrow j to convey the recording sheet S, and drives the carriage motor 35 in the forward and reverse directions to perform predetermined serial recording by the head cartridge 9. Take action.

S7: The trailing edge sensor 6 detects the trailing edge of the recording sheet S.

S8: The trailing edge sensor 31 detects the trailing edge of the first document G.

S9: After the trailing edge of the recording sheet S is detected in S7, the recording motor 34 is stopped after the trailing edge of the sheet is conveyed to a recording position by a certain amount.
Similarly, after the trailing edge of the first original G is detected in S8, the feeding / reading motor 32 is stopped after the trailing edge of the original is conveyed by a certain amount until it reaches the reading position. At this time, the above-mentioned interval Ld is secured between the rear end of the first original G and the front end of the second original G.

S10: Similar to S2, the paper feeding / reading motor 32 is driven to start the paper feeding operation of the second recording sheet S. At the same time, the recording motor 34 is driven to eject the first recording sheet S, and the second recording sheet S fed from the paper feeding system A is also conveyed.

S11: Similar to S3, when the recording sheet front and rear edge sensor 6 detects the leading edge of the second recording sheet S, the sheet S can be conveyed only by driving the recording motor 34. The drive of the paper / reading motor 32 (paper feeding system A) is stopped.

S12: Similar to S4, after the recording sheet S has been set to the top, the driving of the recording motor 34 is stopped and the feeding / reading motor 32 is rotated in the direction of arrow g to move the second original. G is fed and the first original G is ejected.

S13: The leading edge and trailing edge sensor 31 detects the leading edge of the second document G.

S14: Similar to S6, when the front end of the original G is conveyed by a predetermined amount after the front end of the original is detected in S13, the front end of the original G reaches the reading position 19a of the photoelectric conversion element 19, so that the reading operation is started. Then, the image signal is sent to the recording system B. Receiving the image signal, the recording system B rotates the recording motor 34 in the direction of the arrow j to convey the recording sheet S, and drives the carriage motor 35 in the forward and reverse directions to perform predetermined serial recording by the head cartridge 9. Take action.

S15: Similar to S7, the sheet front / rear sensor 6 detects the rear edge of the second recording sheet S.

S16: The second document G is also conveyed, and the document presence / absence sensor 30 detects that there is no document remaining on the document table 14.

S17: Similar to S8, the document leading edge sensor 31 detects the trailing edge of the second document G.

S18: In the same manner as in S9, after the trailing edge of the recording sheet S is conveyed by a predetermined amount until it reaches the recording position,
The driving of the recording motor 34 is stopped, and the rear end of the original G is conveyed by a predetermined amount until it reaches the reading position, and then the paper feed / feeding is performed.
The driving of the reading motor 32 is stopped.

S19: The recording motor 34 is rotated by a certain amount in the direction of arrow j, and the trailing edge of the recording sheet S is discharged from the recording system B. At the same time, the feeding / reading motor 32 is rotated in the direction of arrow g, and the trailing edge of the document G on the last page is discharged.

S20: The recording motor 34 is rotated by a certain amount in the direction of arrow i, the cleaning device 40 cleans the recording head portion of the head cartridge 9, and the process ends.

The copy mode is executed by the operations described above. On the other hand, in the transmission mode, only the operation of reading the original G is performed by performing the operations of the paper feed / reading motor 32, the original presence / absence sensor 30 and the original front / back edge sensor 31 in the same manner.

In the receiving mode, only the sheet feeding and recording operation of the recording sheet S is performed, and the sheet feeding / reading motor 32 described above is used.
And the recording motor 34 and the sheet front and rear end sensor 6 are similarly operated.

[Second Embodiment] Next, a second embodiment of the facsimile apparatus to which the present invention is applied will be described with reference to FIG. It should be noted that those having the same functions and configurations as those of the above-described first embodiment are designated by the same reference numerals and the description thereof is omitted.

FIG. 9 is a front view showing the construction of the switching means in the drive system. In this embodiment, the solenoid is used to switch the driving force transmission. In the figure, splines, grooves, etc. are formed on the outer peripheral surface of the output shaft 32s of the paper feeding / reading motor 32, and fixed in the rotation direction with respect to the sliding hole provided at the rotation center of the output gear 32a. The structure is slidable in the state and in the longitudinal direction (thrust direction). Further, the position of the output gear 32a in the thrust direction is constrained by the actuator 39a connected to the solenoid 39, and the actuator 39a is moved by the solenoid in the direction of arrow p, so that the output gear 32a moves from the position m. Move to n. Therefore, the output gear 32a is connected to the sheet feeding system gear wp1 when it is at the position m, and is connected to the reading system gear w1 when it is at the position n.

By driving the solenoid 47 with the above configuration and operation, the rotation direction of the motor is not changed,
It is possible to switch the drive between the paper feed system and the reading system.

[Other Embodiments] In the embodiments described above,
Although the switching mechanism is used to drive the paper feeding system and the reading system by a common drive motor, the present invention is not limited to this. For example, the reading system and the recording system are driven by a common drive motor. It may be configured to do so.

Further, in the above-mentioned embodiment, the structure in which the timer means having a predetermined play amount at the engaging portion is interposed between the document conveying system and its power transmission mechanism has been exemplified.
The present invention is not limited to this. For example, the timer means may be interposed between the recording sheet conveying system and its power transmission mechanism.

Further, in the above-mentioned embodiment, the drive switching by the switching mechanism is engaged with either the paper feeding system or the reading system, but the present invention is not limited to this, and for example, the paper feeding system. Alternatively, the configuration may be such that switching to a neutral position that does not mesh with any gear of the reading system is possible.

Further, in the above-mentioned embodiment, the facsimile apparatus equipped with the ink jet printer has been exemplified, but the recording system includes a thermal transfer printer, a laser beam printer and the like, and the recording means can be appropriately selected.

[0077]

As described above, according to the present invention,
In a facsimile apparatus including at least a document feeding unit, a recording unit, and a paper feeding unit, a drive motor is not provided for each unit, but a required minimum number of drive motors is provided, thereby achieving cost reduction, size reduction, and weight reduction. You can

Further, according to the present invention, in the facsimile apparatus configured to selectively drive paper feeding / reading by the common drive motor, even when the reading operation of a plurality of originals is performed, the recording sheet is inserted between each page of the originals. Even if the paper feeding operation is performed, it is possible to always obtain a stable original reading area.

Further, according to the present invention, by interposing the timer means having a predetermined amount of play in the engaging portion between the document conveying means and the power transmission mechanism thereof, the influence of backlash occurring at the time of drive switching. It is possible to prevent variations in the positional relationship between the document and the reading position due to the, and to prevent image deterioration. That is, the reading area of the original and the read image can always be stabilized. Further, the same effect can be obtained by applying the above-described present invention to the recording sheet conveying system.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main configuration of a facsimile apparatus.

FIG. 2 is a cross-sectional view for explaining the operation of the facsimile device.

FIG. 3 is an external perspective view showing an arrangement state of electric / electronic circuit boards of the facsimile apparatus.

FIG. 4 is a schematic diagram showing a configuration of a drive system of a facsimile device.

FIG. 5 is a cross-sectional view of essential parts showing the configuration of a switching mechanism in a drive system.

FIG. 6 is an explanatory diagram of a document separating mechanism.

FIG. 7 is a block diagram showing a configuration of a control system of the facsimile apparatus.

FIG. 8 is a timing chart of motor drive control of the facsimile apparatus.

FIG. 9 is an explanatory view of a main part showing another configuration of the switching mechanism in the drive system.

[Explanation of sign]

A ... paper feeding system, B ... recording system, C ... reading system, D ... operating unit, G
... manuscript, S ... recording sheet, T1, T2 ... timing belt, w1-w11 ... gear, wp1-wp4 ... gear pulley,
w20 to w26 ... Gear, 1 ... Paper feed cassette, 3 ... Paper feed roller, 3a ... One-way clutch, 4 ... Separation pad, 5
a, 5b ... Feed roller, 6 ... Sheet leading edge sensor,
Reference numeral 7 ... Device body, 7a ... Front surface, 7e ... Opening portion, 8 ... Platen roller, 9 ... Head cartridge, 10a, 10b ... Ejection roller, 11 ... Sheet tray, 12 ... Recording cover, 14 ... Original placing table, 15 ... Original Tray, 16a ... Separation roller, 16a1 ... Recessed portion, 16b ... Pressure contact piece, 16c ... One-way clutch, 16c1 ...
Protrusion, 17a, 17b ... Conveying roller, 18a, 18b ... Ejecting roller, 19 ... Photoelectric conversion element, 20 ... White roller, 21a, 21b, 21
c, 21d, 21e, 21f ... Substrate, 21f1 ... Printer interface, 30 ... Original presence / absence sensor, 31 ... Original front / rear sensor, 32 ... Paper feeding / reading motor, 32a ... Output gear, 32s ... Output shaft, 33 ... Switching arm , 33a ... Switching gear, 33b ... Rotation center gear, 33c ... Shaft, 33d ... Coil spring, 34 ... Recording motor, 35 ... Carriage motor, 36 ... Retaining ring, 37 ... Drive base, 38 ... Shaft, 39 ... Solenoid, 39a ... actuator,
40 ... Cleaning device, 41 ... Control part, 41a ... CPU, 41
b ... ROM, 41c ... RAM, 42, 43, 44 ... Motor drive circuit

Claims (11)

[Claims] 1. A reading unit for reading an image of an original, an original conveying unit for conveying the originals one by one to the reading unit, and a front and rear end of the original interposed between the reading unit and the original conveying unit. A document front / rear end detection unit for detecting the front end of the preceding document and a front end of the trailing document determined by the document conveyance unit. A sheet material feeding device characterized by being larger than the interval. 2. A recording means for recording a predetermined image on a recording sheet, a recording sheet conveying means for conveying recording sheets one by one to the recording means, and between the recording means and the recording sheet conveying means. An intervening recording sheet front and rear edge detecting means for detecting the front and rear edges of the recording sheet, and the distance between the rear edge of the preceding recording sheet and the front edge of the following recording sheet determined by the recording sheet conveying means is A sheet material feeding device, characterized in that the distance is larger than the distance between the recording means and the recording sheet front and rear edge detecting means. 3. A conveyance means for conveying a sheet material, a drive motor for driving the conveyance means, a switching means capable of transmitting / disconnecting the power of the drive motor to a power transmission mechanism of the conveyance means, and the drive motor. And a control means for controlling the drive of the switching means, and the power transmission mechanism has a timer means for transmitting the power from the drive motor to the conveying means after a lapse of a predetermined time. 1
Alternatively, the sheet material feeding device according to claim 2. 4. The sheet material feeding device according to claim 3, wherein the timer means comprises an engaging convex portion and an engaging concave portion having a predetermined amount of play in the engaging portion. 5. A reading unit for reading an image of an original, an original conveying unit for conveying the originals one by one to the reading unit, and a front and rear end of the original interposed between the reading unit and the original conveying unit. A facsimile device comprising: a document leading edge / trailing edge detecting unit for detecting a recording sheet; a recording unit for recording a predetermined image on a recording sheet; and a recording sheet conveying unit for conveying the recording sheet to the recording unit. Switching means for selectively meshing with each power transmission mechanism of the conveying means and the recording sheet conveying means, and a drive motor for selectively driving the original conveying means and the recording sheet conveying means via the switching means. And control means for controlling the drive of the drive motor and the switching means, and the power transmission mechanism transmits the power from the drive motor to the transport means after a predetermined time has elapsed. Facsimile apparatus characterized by having a timer means. 6. The facsimile apparatus according to claim 5, wherein the timer means comprises an engaging convex portion and an engaging concave portion having a predetermined amount of play in the engaging portion. 7. In the facsimile device, the distance between the trailing edge of the leading document and the leading edge of the trailing document determined by the document feeding means is larger than the distance between the reading means and the document leading and trailing edge detecting means. 7. The facsimile apparatus according to claim 5 or 6, characterized in that. 8. The facsimile apparatus according to claim 7, wherein the facsimile apparatus drives and controls so as to convey the recording sheet after the image reading of the document is completed. 9. The facsimile device, when carrying the recording sheet while reading images of a plurality of originals, records the recording sheet after the image reading of the preceding original is completed and before the image reading of the succeeding original is started. 8. The facsimile apparatus according to claim 7, wherein the driving is controlled so that the image reading of the succeeding document is started after the recording sheet is conveyed. 10. A reading unit for reading an image of a document, a document conveying unit for conveying the document to the reading unit, a document front / rear end detecting unit for detecting a front / rear end of the document, and a plurality of documents. An original separating / conveying unit capable of separating and conveying the originals one by one and the distance between the conveyed originals by a predetermined distance or more; a recording unit for recording a predetermined image on a recording sheet;
The recording sheet conveying unit that conveys the recording sheet to the recording unit, and the original document conveying unit and the recording sheet conveying unit are selectively driven by a common drive motor to drive the original document and the recording sheet. A distance between the original determined by the original separating / conveying means and the original is larger than an interval between the reading position of the reading means and the detection position of the original leading / trailing edge detecting means. Characteristic facsimile machine. 11. A reading unit for reading an image of a document, a document conveying unit for conveying the document to the reading unit, a document front / rear end detecting unit for detecting a front / rear end of the document, and a plurality of documents. An original separating / conveying unit capable of separating and conveying the originals one by one and the distance between the conveyed originals by a predetermined distance or more; a recording unit for recording a predetermined image on a recording sheet;
A recording sheet conveying unit that conveys a recording sheet to the recording unit, and the document conveying unit and the recording unit are selectively driven by a common drive motor to drive the document conveying and the recording, respectively. And a distance between the original and the original determined by the original separating / conveying means is larger than an interval between the reading position of the reading means and the detection position of the original front and rear edge detecting means. Facsimile machine.