JPH0520024B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a scanner printer having an original reading section and a recording section in the same device, like a facsimile device having a copying function.

2. Description of the Related Art Scanner printers generally use three motors: a motor for conveying a document, a motor for conveying recording paper, and a cutter drive motor for cutting recording paper. However, since it is uneconomical to use three motors, proposals have been made to share the motors. As an example, there is known an apparatus shown in FIG. 3 in which a single motor is used to transport the document and drive the cutter.
To explain this simply, in Figure 3, 31
32 is a recording paper; 33a is a cutter rotary blade; 33
b is a cutter fixed blade, a pulley 35 is attached to the shaft of the document transport roller 31 via a one-way clutch 34, and a cutter rotating blade 33
A pulley 37 is also attached to the shaft of a through a one-way clutch 36, and these pulleys 3
5 and 37 are connected to a common motor 39 via a belt 38.
The structure is such that it is driven by The motor 39 used here is a reversible motor. A one-way clutch 34 attached to the document conveyance roller 31 transmits the rotation of the pulley 35 to the shaft when it rotates in the α direction, but causes the pulley to idle when it rotates in the β direction. Katsuta rotary blade 33
The one-way clutch 36 attached to a has the opposite effect, transmitting the rotation of the pulley 37 in the β direction to the cutter rotary blade, and causing the pulley to rotate idly in the α direction. In this way, in the device of FIG.
If the motor 39 is in one direction, e.g. the pulleys 35, 37
When the document transport roller 31 is rotated in the α direction, the document conveyance roller 31 is driven, and the cutter rotary blade 3 is rotated during that time.
3a is stopped, and when the motor 39 rotates in the opposite direction, the document conveyance roller 31 stops and the cutter rotary blade 33a is driven.

Problems to be Solved by the Invention However, the structure that includes the one-way clutch in the drive system as described above has the problem of causing uneven document feeding in the reading section in devices that operate intermittently, such as facsimile machines. It had That is, with a one-way clutch, there is always a delay in clutch operation at the time of startup, which causes uneven document feeding. Furthermore, in the conventional structure described above, the document transport roller and the cutter cannot be operated at the same time, so there is a problem that full-duplex communication of transmitting and receiving is not possible.

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

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a paper feeding means for taking out the original to be read placed in the paper feeding section, and a conveying means for transporting the original to be read through the reading section. A common motor that rotates in one direction drives the document conveyance mechanism and the cutter mechanism that cuts the recording paper, and a clutch mechanism is interposed between the cutter mechanism and the motor. The cutter mechanism is connected to the motor and driven only in certain cases.

By the way, it has been found that with a configuration in which the document transport mechanism and the cutter mechanism are simply driven by rotation of a motor in one direction, a new problem arises when copying multiple sheets of documents. That is, in a copying operation, one document is read and its contents are simultaneously recorded on a recording paper inside the device, and when the reading and recording of the document is completed, the cutter mechanism is activated to cut the recording paper. Since the document conveying mechanism is driven by a motor even when the mechanism is in operation, a problem arises in that the leading edge of the next document passes through the reading position, making it impossible to record that portion.

In order to solve this problem, in the present invention, when a plurality of originals are fed one after another, a means is provided to create a distance between the originals by a distance greater than the original transport distance by the rotation of the motor for operating the cutter mechanism. It also has a structure.

Effects The present invention, with the above-described configuration, eliminates the need for a clutch such as a one-way clutch in at least the conveyance means for conveying the document through the reading section in the document conveyance mechanism, and eliminates uneven feeding caused by the clutch mechanism. Can be removed.

Also, when copying multiple originals, the gap between the originals is longer than the distance that the originals are transported while the cutter mechanism is operating, so the cutter mechanism must be operated after the originals have been scanned. However, the leading edge of the next document does not pass the reading position, and it is possible to copy multiple documents without any problems.

Furthermore, since document conveyance and cutting operations can be performed simultaneously, full-duplex communication is also possible when the apparatus of the present invention is used as a facsimile apparatus.

Embodiments Hereinafter, preferred embodiments of the present invention will be described 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 illustrating paper feeding timing during a copying operation in the facsimile apparatus. In FIGS. 1 and 2, 1 is a document transport roller, 2 is a document reading section, and 3 is a document conveyance roller.
is a pinch roller pressed against the document transport roller 1. Original transport roller 1 and pinch roller 3
constitutes a conveying means for conveying the original 4 through the reading section 2. The shaft of the document transport roller 1 has a first
A pulley 6 is attached, and the pulley 6 is connected to a motor 7.
A belt 9, which is a first transmission means, is connected to a second pulley 8 held on a drive shaft. The motor 7 is a motor that rotates in one direction (α direction), and the document conveying roller 1 is always driven to rotate in the α direction while the motor 7 is rotating.

Reference numeral 10 denotes a recording paper, and 11 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 has a second
A gear 13 and a spring clutch mechanism 14 are provided as transmission means. The gear 13 is rotatably provided with respect to the shaft 12, and meshes with a gear 16, which is a third transmission means, and rotates together with a third pulley 15 driven by a belt 9 driven by a motor 7. Together, they constitute a transmission mechanism. Therefore, the gear 13 rotates in the β direction due to 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. In order to control the spring clutch mechanism 14, a swingable pawl 17, which is normally connected to the spring clutch mechanism 14, is provided. A spring 18 is provided which urges a built-in power transmission spring (not shown) into a position where it engages, and a solenoid 19 which pivots the pawl 17 upward to disengage it from the spring. solenoid 1
When the claw 17 is lifted by the lever 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. Note that the rotation of the motor 7 is controlled by the cutter rotary blade 11a.
The clutch mechanism for selectively transmitting the clutch is not limited to the illustrated spring clutch mechanism, but other types of clutches may be used.

In FIG. 2, upstream of the document conveyance roller 1, there is a paper feed unit 21 that accommodates a large number of documents 4, and a paper feed unit that takes out the documents one by one, that is, a paper feed roller 2.
2 is provided. The paper feed roller 22 is drivingly connected to the shaft of the document transport roller 1 via a suitable clutch (not shown), and is driven by the motor 7 together with the document transport roller 1 when the clutch is operated. This paper feeding means 22 and conveyance means such as the document conveyance roller 1 and the pinch roller 3 constitute a document conveyance mechanism.The document reading section 2 includes a sensor 24 that detects the end of the document, and a sensor 24 that irradiates the document 4. Fluorescent lamp 25, lens 26 that focuses reflected light from the original
An image sensor 27 and the like are provided.

The clutch provided on the paper feed roller 22 is provided with a control circuit for controlling its actuation timing. This operation timing is such that the interval between the documents fed to the reading section during the copying operation is adjusted so that the document conveyance mechanism (the paper feed roller 22 and the document conveyance roller 1) rotates between the rotations of the motor for one cutter operation. is set to be greater than the distance l for conveying the document. For example, as shown in FIG. 2, the distance between the paper feed roller 22 and the document reading position is
If the structure is such that the document is separated by the document conveyance distance l during one cutter operation, the timing of actuation of the clutch that operates the paper feed roller 22 is when the end of the document passes the reading position after reading, or when the end of the document passes the reading position. It is decided that it will happen after that. If the distance between the paper feed roller 22 and the reading position is shorter than the document transport distance l described above, the operation timing is delayed accordingly. Conversely, if the interval is long, the activation timing can be advanced. In this way, the control circuit that controls the actuation timing of the clutch provided on the paper feed roller 22 adjusts the interval between the documents fed to the reading section during the copying operation.
The present invention constitutes a means for allowing a distance l or more for the document conveyance mechanism to convey the document during rotation of the motor for one cutter operation.

Next, regarding the facsimile device with the above configuration,
Let's explain its operation. A facsimile machine has three operating states: sending, receiving, and copying, and each will be explained below.

In the transmitting state, the motor 7 rotates in the α direction,
The document conveyance roller 1 rotates to convey the document 4 through the reading section, and the document 4 is sequentially read by the reading section. At this time,
Gear 13 on the shaft 12 of the cutter rotary blade 11a
is rotating in the β direction, but since the pawl 17 engages with the built-in spring of the spring clutch mechanism 14 and does not transmit power, the gear 13
The cutter rotating blade 11a is stopped.

In the reception state, the recorded recording paper 10 passes through the cutter mechanism 11, and when the cutter operation is performed, the motor 7
rotates in the α direction, and the claw 17 is rotated by the solenoid 19.
rises, the spring clutch mechanism 14 operates to transmit the rotation of the gear 13 to the cutter rotary blade 11a, and the cutter rotary blade 11a rotates. At this time, as the motor 7 rotates for the cutter operation, the document transport roller 1 also rotates, but since the receiving operation is in progress,
Even if the document transport roller rotates, there is no problem with the apparatus.

In the transmitting/receiving state, the motor 7 rotates and the document is read while being fed by the document conveyance roller, and at the same time, the document is received onto the recording paper. At this time, when the predetermined reception is completed, the solenoid 19 is activated 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 reading operation becomes high, and the rotation time of the cutter rotary blade 11a can be shortened, so there is no problem in operating the cutter mechanism during reading. , therefore,
Full duplex communication becomes possible.

In the copying state, the motor 7 rotates in the α direction as shown in FIG. The information is read and recorded on the recording paper 10 at the same time. Note that the clutch of the paper feed roller 22 is deactivated at an appropriate time after the document 4 from the paper feed section 21 is sent to the document transport roller 1.
The paper feed roller 22 is not forcibly driven. When the end of the document being read passes the sensor 24 and is then fed a specified amount, the end of the document reaches the reading position and reading of one document is completed, and at the same time, the recording paper 10
For cutting, the cutter mechanism 11 is activated. The operation of the cutter mechanism 11 is performed by counting an appropriate amount of time from the detection signal of the end of the document by the sensor 24. While the cutter mechanism 11 is in operation, the motor 7 is of course rotating, so the original 4 after being read is sent out by the original transport roller 1. On the other hand, after the end of the document passes the sensor 24, the clutch of the paper feed roller 22 is operated at an appropriate timing, and a new document from the paper feed section 21 is sent out by the paper feed roller 22. This paper feed roller 22 is connected to the motor 7 for operating the cutter mechanism 11 when the clutch is in operation.
Since it is also driven during rotation, a new document from the paper feed section is sent toward the reading section 2 while the cutter is in operation. However, as described above, the operation timing of the paper feed roller 22 is such that the interval between the leading edge of a new document and the end of the scanned document is determined by the rotation of the motor 7 during one cutter operation. Paper feed roller 22 and document transport roller 1)
is determined to be equal to or longer than the distance l for conveying the document, so that the leading edge of a new document does not pass the reading position during the cutting operation, and copying can be performed without any trouble in reading.

Effects of the Invention As is clear from the above description, the present invention utilizes the drive motor for the document transport mechanism as a drive source for the cutter mechanism, and the rotation direction of the drive motor is unidirectional. A clutch mechanism is not required for the conveyance means that conveys the document through the copying machine, reducing unevenness in document feeding, and during continuous copying operations, an appropriate interval is left between successively fed documents. The cutter operation does not interfere with original reading, and good copying is possible.Furthermore, it is possible to operate the document transport mechanism and the cutter mechanism at the same time.
In a facsimile device, it has effects such as enabling full-duplex communication.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing the drive system of a facsimile machine according to an embodiment of the present invention, FIG. FIG. 2 is a perspective view schematically showing a drive system of the facsimile device. 1...Document transport roller, 2...Reading unit, 4...
Original, 7...Motor, 10...Recording paper, 11...
Katsuta mechanism, 11a...Katsuta rotary blade, 11b...
...Katsuta fixed blade, 12...Shaft, 13...Gear, 14...Spring clutch mechanism, 17...
Claw, 19... Solenoid, 21... Paper feed section, 22
...Paper feed roller, 24...Sensor, 27...Image sensor.

Claims (1)

[Claims] 1. A document transport mechanism including a paper feed means for taking out a document placed in a paper feed section and a transport means for transporting the document through a reading section; a first pulley attached to a shaft of the transport means; a motor that rotates in a direction, a second pulley held on a drive shaft of the motor, and a second pulley that connects the first pulley and the second pulley and transmits the rotation of the motor to the conveying means. 1, a rotary cutter blade that cuts the recording paper together with a fixed cutter blade, a transmission mechanism that transmits the rotation of the motor to the rotary cutter blade via a clutch, and an interval between documents supplied to the reading unit; A scanner printer characterized in that the scanner printer comprises means for allowing a distance greater than a distance for the document transport mechanism to transport the document during rotation of the motor for one cutter operation.