JP2524052B2 - Image communication device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication apparatus having a document reading section and a recording section in the same apparatus such as a facsimile apparatus having a copy function.

[0002]

2. Description of the Related Art Generally, an image communication apparatus uses a motor for conveying a document, a motor for conveying recording paper, and a cutter driving motor for cutting recording paper, and three motors. However, since it is uneconomical to use three motors, a proposal to share the motors has been made. As one example thereof, there is known a device shown in FIG. 3 which carries out document feeding and cutter driving by a single motor. This will be briefly described. In FIG. 3, reference numeral 31 is a document conveying roller that conveys a document through the reading unit, 32 is a recording sheet, 33a is a cutter rotary blade, and 33b is a cutter fixed blade. Is attached to a pulley 35 via a one-way clutch 34, and a pulley 37 is attached to the shaft of the cutter rotary blade 33a via a one-way clutch 36. These pulleys 35, 37 are attached to a common motor via a belt 38. It is structured to be driven by 39. The motor 39 used here is a reversible rotary motor. The one-way clutch 34 attached to the document conveying roller 31 transmits the rotation of the pulley 35 to the shaft when the pulley 35 rotates in the α direction, but idles the pulley when rotating in the β direction. The one-way clutch 36 attached to the cutter rotary blade 33a acts in the opposite manner, and transmits the rotation of the pulley 37 in the β direction to the cutter rotary blade, and idles the pulley in the α direction. In this way, in the apparatus of FIG. 3, when the motor 39 rotates in one direction, for example, in the direction of rotating the pulleys 35 and 37 in the α direction, the document conveying roller 31 is driven, and the cutter rotating blade 33a stops during that period. Therefore, when the motor 39 rotates in the opposite direction, the document conveying roller 31 stops and the cutter rotating blade 33a is driven.

[0003]

However, the structure including the one-way clutch in the drive system as described above causes the unevenness of the feeding of the document in the reading section in the intermittent operation like the facsimile machine. Had a point. That is, in the one-way clutch, there is always a delay in the clutch operation at the time of start-up, which causes unevenness in the feeding of the document. Further, in the above-mentioned conventional structure, since the document conveying roller and the cutter cannot be operated at the same time, there is a problem that full duplex communication of receiving while transmitting cannot be performed.

The present invention has been made in view of the above-mentioned problems, and does not use a clutch mechanism that causes unevenness in feeding in a document feeding means for feeding a document through a reading section, and further, with the same motor. An object of the present invention is to provide a scanner printer capable of driving a document transport mechanism and a cutter, and also capable of full-duplex communication when applied to a facsimile apparatus.

[0005]

In order to solve the above-mentioned problems, the present invention uses a motor that rotates only in one direction as a drive motor, and the rotation of this motor conveys a document by a first transmission mechanism. The second transmission mechanism transmits it to the cutter mechanism via the clutch.

[0006]

The present invention eliminates the need for a clutch such as a one-way clutch in the document transport mechanism for transporting at least a document through the reading section, and eliminates uneven feeding due to the clutch mechanism. can do.

Further, since the document conveyance and the cutter operation can be performed at the same time, full-duplex communication is also possible when the apparatus of the present invention is used as a facsimile apparatus.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing a drive system of a facsimile apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining a paper feed timing during a copying operation in the facsimile apparatus. In FIGS. 1 and 2, 1 is a document conveying roller, 2 is a document reading unit, and 3 is a pinch roller pressed against the document conveying roller 1. The document conveying roller 1 and the pinch roller 3 form a conveying unit that conveys the document 4 through the reading unit 2. A pulley 6 is attached to the shaft of the document conveying roller 1, and the pulley 6 is connected to a pulley 8 held by a drive shaft of a motor 7 by a belt 9 to form a first transmission mechanism. Motor 7 is in one direction (α direction)
The original conveying roller 1 is a motor that rotates to
During the rotation of, it is always driven to rotate in the α direction.

Reference numeral 10 is a recording paper, and 11 is a cutter mechanism for cutting the recording paper 10 at a predetermined position. The cutter mechanism 11 has a cutter rotary blade 11a and a cutter fixed blade 11b, and a shaft 12 of the cutter rotary blade 11a is provided with a gear 13 and a spring clutch mechanism 14. The gear 13 is rotatably provided with respect to the shaft 12, and meshes with a gear 16 that rotates together with a pulley 15 driven by a belt 9 driven by a motor 7 to form a second transmission mechanism. ing. Therefore, the gear 13 rotates in the β direction by the rotation of the motor 7 in the α direction. The spring clutch mechanism 14 selectively transmits the rotation of the gear 13 to the shaft 12, and in order to control the spring clutch mechanism 14, the swingable pawl 17 and the pawl 17 are normally connected to the spring clutch mechanism 14. A spring 18 for urging a built-in power transmission spring (not shown) and a solenoid 19 for rotating the pawl 17 upward to disengage the spring 18 are provided. . Solenoid 1
When the pawl 17 is lifted by 9, the rotation of the gear 13 is transmitted to the cutter rotary blade 11a, and the cutter rotary blade 11a rotates in the β direction to cut the recording paper. The motor 7
The clutch mechanism for selectively transmitting the rotation of No. 1 to the cutter rotary blade 11a is not limited to the illustrated spring clutch mechanism, and other types of clutches may be used.

In FIG. 2, a paper feed section 21 for accommodating a large number of originals 4 and an original 1 are provided upstream of the original conveying roller 1.
A sheet feeding unit for taking out the sheets one by one, that is, a sheet feeding roller 22 is provided. The paper feed roller 22 is drivingly connected to the shaft of the document feeding roller 1 via an appropriate clutch (not shown), and is driven by the motor 7 together with the document feeding roller 1 when the clutch is operated. The paper feeding means 22 and the conveying means such as the original conveying roller 1 and the pinch roller 3 constitute an original conveying mechanism. The document reading unit 2 includes a sensor 24 that detects the end of the document, a fluorescent lamp 25 that illuminates the document 4, a lens 26 that focuses reflected light from the document, and an image sensor 27.
Etc. are provided.

The clutch provided on the paper feed roller 22 is provided with a control circuit for controlling the operation timing of the clutch. The operation timing is such that the interval between the originals supplied to the reading unit during the copy operation is the same as the original conveyance mechanism (the paper feed roller 22 and the original conveyance roller 1) during the rotation of the motor for one cutter operation. Is set so that the document is conveyed at a distance of 1 or more. For example, as shown in FIG. 2, when the distance between the paper feed roller 22 and the document reading position is set to be separated by the document conveyance distance 1 in one cutter operation, the paper feed roller 22 is operated. The operation timing of the clutch is set such that the end of the document after reading has passed the reading position or after that. If the distance between the paper feed roller 22 and the reading position is shorter than the document conveyance distance 1 described above, the operation timing is delayed accordingly. On the contrary, when the interval is long, the operation timing can be advanced.
As described above, the control circuit that controls the operation timing of the clutch provided on the paper feed roller 22 determines the interval between the documents supplied to the reading unit during the copy operation during the rotation of the motor for one cutter operation. In addition, a means for moving the document by a document transport mechanism at a distance of 1 or more is configured.

Next, the operation of the facsimile apparatus having the above configuration will be described. Send to a fax machine,
There are three operation states, reception and copy, and each of them will be described.

In the transmitting state, the motor 7 rotates in the α direction, the original feeding roller 1 rotates, the original 4 is conveyed through the reading unit, and the reading unit sequentially reads. At this time, the gear 13 on the shaft 12 of the cutter rotary blade 11a is rotating in the β direction, but the claw 17 engages with the built-in spring of the spring clutch mechanism 14 so as not to transmit power. Only the gear 13 idles and the cutter rotary blade 1
1a is stopped.

In the reception state, the recorded recording paper 10 passes through the cutter mechanism 11, and when the cutter is operated, the motor 7 rotates in the α direction, the solenoid 17 raises the pawl 17, and the spring clutch mechanism 14 operates. The rotation of the gear 13 is transmitted to the cutter rotary blade 11a,
a rotates. At this time, the document conveying roller 1 also rotates with the rotation of the motor 7 for the cutter operation, but since the document conveying roller is in the receiving operation, there is no problem as the apparatus even if the document conveying roller rotates.

In the transmission / reception state, the motor 7G rotates and the original is conveyed by the original conveying roller while reading is performed, and at the same time, the recording sheet is received. At this time, when the predetermined reception is completed, the solenoid 19 is operated to operate the cutter mechanism 11 to cut the recording paper. When a high-speed data transmission path is used, the rotation speed of the motor 7 during the reading operation becomes high, and the rotation time of the cutter rotary blade 11a can be shortened. Therefore, even if the cutter mechanism is operated during the reading, there is no problem. Therefore, full-duplex communication becomes possible.

In the copy state, as shown in FIG. 2, the motor 7 rotates in the direction .alpha., And the original 4 is conveyed from the paper feeding section 21 by the original conveying rollers 1 through the reading section 2 and the contents thereof are imaged. It is read at 27 and recorded on the recording paper 10 at the same time. The latch of the paper feed roller 22 is deactivated at an appropriate time after the document 4 of the paper feed unit 21 is fed to the document feed roller 1, and the paper feed roller 22 is not forcibly driven. When the end of the document being read passes through the sensor 24 and is fed by a specified amount after that, the end of the document reaches the reading position and the reading of one document is completed, and at the same time, the cutter mechanism is cut for cutting the recording paper 10. 11 is activated. This cutter mechanism 1
The operation 1 is performed by counting an appropriate time from the detection signal of the end of the document by the sensor 24. Cutter mechanism 1
Since the motor 7 is naturally rotating during the operation of 1, the original 4 after reading is sent out by the original conveying roller 1. on the other hand,
After the end of the document passes through the sensor 24, the clutch of the paper feed roller 22 is activated at an appropriate timing, and the paper feed unit 21
The new original document is sent out by the paper feed roller 22. Less than,
The same operation is repeated to copy.

[0018]

As is apparent from the above description, according to the present invention, the drive motor for the document conveying mechanism is used as the drive source of the cutter mechanism, and the rotation direction of the drive motor is one direction. No need for a clutch mechanism in the conveying means for conveying the original through the reading section, unevenness in the feeding of the original can be reduced, and the original conveying mechanism and the cutter mechanism can be operated at the same time. Has the effect of enabling full-duplex communication.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a drive system of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a paper feed timing during a copy operation in a facsimile apparatus.

FIG. 3 is a perspective view schematically showing a drive system of a conventional facsimile device.

[Explanation of symbols]

 1 Document Conveying Roller 2 Reading Part 4 Document 7 Motor 10 Recording Paper 11 Cutter Mechanism 11a Cutter Rotating Blade 11b Cutter Fixed Blade 12 Shaft 13 Gear 14 Spring Clutch Mechanism 17 Claw 19 Solenoid 21 Paper Feeding Section 22 Paper Feeding Roller 24 Sensor 27 Image Sensor

Claims (1)

(57) [Claims] 1. A conveying means for conveying a document taken out from a paper feeding section through a reading section, a motor rotating in one direction, and a first transmitting means for directly transmitting the rotation of the motor to a shaft of the conveying means. A cutter rotary blade for cutting the recording paper together with the cutter fixed blade, and a second transmission means for transmitting the rotation of the motor to the cutter rotary blade via a clutch , the motor being for transporting the recording paper. Separate from motor
An image communication device characterized by being individual .