JPH03162335A - Separating feed method for paper sheet and printer device thereof - Google Patents

Abstract

PURPOSE:To stably insure separation of a paper sheet and shorten paper feed time by lowering rotational speed of a paper feed roller at separation process, and increasing rotational speed of the paper feed roller at feed process after separation process. CONSTITUTION:At separation process, the uppermost paper sheet P of sheet layer piled on a paper feed stacker 7 and contacted with a paper feed roller 6 is suffered from sudden variation from static condition to dynamic condition by the rotating force of the paper feed roller 6, but separation of the paper sheets P is surely performed by lowering rotational speed of the paper feed roller 6. Meanwhile, at feed process, when the paper sheet P separated at the separation process is fed to the platen part 12 of a printer main body 2, rotational speed of the paper feed roller 6 is increased from the rotational speed at separation process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper separation and feeding method and a printer device thereof. [Prior Art] Regarding the performance of printer devices, not only quality but also shortening of printing time is required. This printing time is particularly important when printing a large amount, and the printing time is the sum of the time for feeding paper from the automatic paper feeder to the printer body and the printing time in the printer body. The paper feeding time for this paper is determined by the rotation speed of the paper feed roller of the automatic paper feeder.
As a printer device having such an automatic paper feeding device, for example, one shown in Japanese Utility Model Application Publication No. 163332/1983 is known.

9 to 14 show an example of this type of printer device.

In FIGS. 9 through 11, 101 is a printer device, and this printer device 101 is composed of a printer body 102 for printing on paper P and an automatic paper feeder 103. The automatic paper feeder 103 includes a frame body 104 that can be removably attached to the upper part of the printer body 102, and left and right side plates 104A that constitute this frame body 104.
A paper feed shaft 105 is rotatably suspended horizontally between them, and a rubber paper feed roller {06 is attached to the middle of the paper feed shaft 105.

Reference numeral 107 denotes a paper feed stacker located behind the paper feed shaft 105 and attached to the frame body 104. This paper feed stacker 107 stores unprinted paper P.
A pressure plate 107A is provided for pressing the entire paper feed roller 106 against the paper feed roller 106, and a pressing force is applied to this pressure plate 1-107A by a coil spring 107B.

Reference numeral 108 denotes a separation member that works together with the paper feed roller 106 to separate the sheets P stacked on the paper feed stacker 107 one by one.

In front of the paper feed roller 106, there is a discharging roller 10.
9 is provided on a wandering paper roller shaft 110 that is rotatably suspended horizontally between the left and right side plates 104A, and a discharge stacker 111 is provided on the frame body 1o4, and this paper discharge stacker 111 is used to collect paper P after printing has been completed. It accommodates.

112 is a platen portion of the printer main body 102, and a pulse motor M is connected to the drive shaft 113 via a gear train 114A.
are connected.

Further, 114 is a platen gear attached to the drive shaft 113, and a passive gear 115 attached to the frame body 104 of the automatic paper feeder l03 is engaged with this. A gear 119A of the drive disk 119 is engaged with this passive gear 115 via a first gear 116, a second gear L17, and a third gear 118. The drive disk 119 has a rotatable pawl 120 and is loosely fitted onto the paper feed shaft 105. In addition, a clutch disc 121 is loosely fitted to the paper feed shaft lO5, and the clutch disc! A pawl gear 122 is located within 21 and fixed to the paper feed shaft 105. A pawl gear 122 and a drive disk 119 can be freely connected via a pawl 120. That is,
A clutch 123 is formed by a drive disk 119, a clutch disk l21, and a pawl gear 122.

The third gear 118 meshes with a sixth gear 126 coaxially fixed to the ejecting roller shaft 110 via a fourth gear 124 and a fifth gear 125.

In addition, in the figure, 127 is a PE sensor, and the platen part 112
It is located at the bottom of the . 127A is a pinch roller,
It is provided near the PE sensor 127.

In FIG. 12, the control device 128 has a CPU 129 and a ROM 130, and a program shown in FIG. 13 for controlling the CPU 129 is stored in the ROMI 30.

Reference numeral 131 is a motor drive that sends a predetermined number of pulse signals to the pulse motor M in response to a command from the control device 12B, and is provided on the printer main body 102 side.

Next, the operation of the printer device 101 having such a structure will be explained as follows.
Figure 3. This will be explained with reference to FIG.

According to the program shown in FIG. 13 and the time chart shown in FIG. 14, the paper is automatically fed and then printed as shown below.

As shown in FIGS. 9 to 11, first, the automatic paper feeder 103 is set in the printer main body 102, and the sheets P are stacked and stored in the paper feed stack 107. Automatic operation switch 132 (
When the program (shown in Figure 12) is input, the program shown in Figure 13 starts. Step S in FIG. . , automatic paper feeder 1
It is determined whether the initial setting of 03 (setting of the relative positional relationship between the drive disk 119 and the clutch disk 121) is necessary.

Step Sl6. If it is determined that it is necessary, the process moves to the next step S161, and the control device 128 sends the pulse motor M via the motor drive 131 to reverse rotation by a rotation angle corresponding to 15 printed lines in the printing line P. A pulse signal is sent to

As mentioned above, the pulse motor M is rotated in the reverse direction, and the gear train 1
Rotate the platen part 112 in the same direction via 14A,
Further, the rotation is transmitted from the platen gear 114 to the drive disk 119 of the clutch 123 via the rotation transmission system, and the drive disk 119 rotates the clutch disk 121 by a predetermined amount.

The program then proceeds to step S,. Proceeding to step 2, a pulse signal is sent from the control device 128 to the pulse motor M via the motor drive 131 to cause the pulse motor M to rotate forward by a rotation angle corresponding to 15 lines in terms of the number of printed lines of the printer P. As mentioned above,
Clutch disc 121 by drive disc II9
rotates a predetermined amount, and the clutch 123 is initialized. When the initialization of the clutch l23 is completed, the program proceeds to step S1o, where the control device if l28 gives a reverse rotation command to the pulse motor M at an angle corresponding to, for example, seven lines of printing, By reversing the pulse motor M, the dry disk 119 is rotated by an angle corresponding to seven lines. Accordingly, the pawl 120 of the drive disk 119 engages with the pawl gear 122, and the clutch 123 is turned on.

When the clutch 123 is turned on, step SI0
Proceeding to step 4, the control device 128 gives a forward rotation command to the pulse motor M at an angle corresponding to a predetermined number of printed lines, and the pulse motor M is rotated forward. Therefore, the rotation of the pulse motor M is transmitted to the paper feed shaft 105, and the paper feed roller 10
6 in the paper feeding direction by an angle corresponding to a predetermined number of print lines.

When this paper feed roller 106 rotates, the paper feed roller 106
Due to the cooperative action of the holder P and the separating member 108, the uppermost sheet of the sheets P stacked on the sheet feed stacker 107 is separated and sent out toward the platen section 112. That is, in step S1.4, the paper P is separated and fed, and the rotational speed of the paper feed roller l06 is 2. The paper P is fed to the platen section 112 by the rotational force of the paper feed roller 106.

Then, the blade P reaches between the platen portion 112 and the pinch roller 127A that presses the platen portion 112, and is squeezed in as both of them rotate. Then, it is determined whether the leading edge of the paper P has been detected by the PE sensor 127 (step S).

,). Step S1. , when the leading edge of the paper P is detected, the process moves to the next stent s+tb and the clutch 123
While in the on state, rotate it further by an angle corresponding to three lines in the normal direction.

After that, Stemp S. , and executes the skew prevention operation of the paper P.

That is, the control device 128 gives a reverse rotation command corresponding to, for example, 4 lines to the pulse motor M, causes the pulse motor M to rotate in the reverse direction, turns off the clasp 123 by this reverse rotation, and at the same time turns the platen section 112 into 4 rows. By rotating the line in the opposite direction, the tip of the paper clip P that is wedged between the platen section 112 and the pinch roller 127A is returned to the paper feed stacker 107 side, and is released from the platen section 112 and the pinch roller 127A to be bent. cause This allows the tip of the Yogi P to
The platen portion 112 and the pinch roller 127A are brought into contact with each other in alignment with the tangent line to prevent the paper P from skewing.

When the above skew prevention operation is completed, the step Stall
1, from the control device 128 to the pulse smoke M,
A paper feed command is given to feed the paper P with its leading edge aligned to the printing position, and the pulse motor M is caused to rotate in the normal direction. As a result, the deflected printing plate P is sent out to the printing side as the platen portion 112 rotates forward.

Then, in the next step S+09, the PE sensor 1
27 determines whether or not the paper P is detected.

When the paper P is detected, the step S. . Then, the control device 128 gives a paper feed command corresponding to, for example, 46 lines to the pulse motor M. This causes the pulse motor M to rotate in the forward direction to rotate the platen section 112 and print on the paper P. Cue the starting position.

Thereafter, paper feed control related to the printing operation in the printer main body 102 is performed, and the printing process is executed until the end of the paper P is detected by the PE sensor 127, and step 31
Go to 1.

In Ste.Five S II1, Panole Smoke M
For example, continues to rotate forward by a rotation angle equivalent to 15 lines,
The paper P on which printing has been completed is sent into the paper discharge stun force 111 by the paper discharge roller 109 and stored.

In this way, the printing cycle of the first page is completed and the printing cycle of the second page is completed.
The print cycle for the page begins, but in this case, Crunch 1
23 has already been initialized, so step S
1.Return to step 3 and execute the steps after Step 103.

[Problems to be Solved by the Invention] However, in the conventional printer device 101, in order to shorten the printing time, the shorter the paper feeding time, the better. A problem arises in that double feeding occurs when separating the yōgi P from the yōgi P.

To describe this in detail, the paper P from the paper feed stunker 107
In the process of separating one sheet at a time, the relationship μ,〉μ2〉μ1 is required. Here, μ is the paper feed roller 10
6, μ2 is the friction coefficient between the handle P and the separating member 108, and μ3 is the friction coefficient between the handle P and the separate member 108.

When the sheets P are separated, the uppermost layer P in contact with the paper feed roller 106 receives the rotational force of the paper feed roller 106 and undergoes a sudden change from stationary to free. ，
The balance between 〉μ2〉μ3 becomes unstable, resulting in double feed.

Therefore, in order to stably separate the paper iPs, it is necessary to slow down the rotation speed of the paper feed roller 106.
There is a problem in that the paper feeding time becomes long, and especially when printing a large amount, the cumulative paper feeding time becomes large.

In short, it is difficult to both ensure stable separation of the paper sheets and shorten the paper feeding time.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a printer device that can shorten paper feeding time while maintaining stable separation of paper sheets. It is.

[Means to solve the problem]

In order to achieve the above object, the invention as set forth in claim 1 is composed of a printer main body and an automatic paper feeder, the printer main body has a platen portion rotated by its drive shaft, and the automatic paper feeder comprises: A paper feed scooper that stacks sheets of paper, a paper feed roller that is placed in front of this paper feed stacker and rotates by receiving a driving force, and a ta action of the paper feed roller that stacks and stacks the paper on the paper feed stacker. The printer device is equipped with a separating member that separates sheets one by one by a separating member, and after separating the sheets one by one from the paper feed stand of the automatic paper feeding device in the separating step, the separated sheets are transferred to the feeding step. In this method, the rotational speed of the paper feed roller in the separation process is set to be lower than the rotational speed of the paper feed roller in the feeding process.

In addition, the invention according to claim 2 is comprised of a printer main body and an automatic paper feeder, the printer main body has a platen portion rotated by its drive shaft, and the automatic paper feeder stacks and stacks sheets of paper. A paper feed stacker, a paper feed roller placed in front of the paper feed stacker that rotates under driving force, and a paper feed stacker stacked together! ! In a printer device equipped with a separation member that separates two sheets of paper one by one in cooperation with a paper feed roller, the paper is fed in the separation process until the leading edge of the separated paper is separated from the separation member by a predetermined distance. The apparatus is equipped with a control device that controls the rotational speed of the roller to be smaller than the rotational speed of the paper feeding roller in a subsequent feeding step after the leading edge of the paper is separated by a predetermined distance.

[Function] In the invention recited in claim 1, in the separation step, the uppermost sheet stacked on the paper feed stunker and in contact with the paper feed roller is moved from rest to motion by the rotational force of the paper feed roller. However, by reducing the rotational speed of the paper feed roller in the separation step, the balance between μ1>μ2>μ can be ensured.

Here, μ1 is the friction coefficient between the paper and the paper feed roller, μ
2 is the friction coefficient between the paper and the separation member, and μ3 is the friction coefficient between the paper and the paper.

On the other hand, in the feeding process, when the paper separated in the separation process is further sent to the platen section of the printer body,
By making the rotational speed of the paper feed roller higher than the rotational speed in the separation process, the time required for feeding in the feeding process is shortened.

Further, in the invention according to claim 2, the leading edge of the paper separated by the separating member is detected by the detection sensor, but the control device controls the feeding time until the leading edge of the separated paper is detected by the detection sensor. The rotation speed of the paper roller is controlled to be smaller than the rotation speed of the paper feed roller after being detected by the detection sensor.

Therefore, before the leading edge of the paper is detected by the detection sensor,
As described above, the balance μ1>μ2>μ is ensured.

Further, after the leading edge of the paper is detected by the detection sensor, the time required for feeding in the feeding process is shortened.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show the contents of a printer device according to an embodiment of the present invention.

In FIGS. 1 to 3, ■ is a printer device, and this printer device 1 is a printer main body 2 that prints paper P.
and an automatic paper feeder 3. The automatic paper feeder 3 includes a frame body 4 that can be removably set on the upper part of the printer body 2, and a paper feed shaft 5 is rotatably suspended horizontally between left and right side plates 4A that guard the frame body 4.
A rubber paper feed roller 6 is attached to the middle of the paper feed shaft 5.

Reference numeral 7 denotes a paper feed stacker located behind the paper feed shaft 5 and attached to the frame body 4. This paper feed stacker 7 accommodates unprinted paper sheets P, and feeds the entire paper sheet P. A preshear plate 7A for pressing against the roller 6 is provided, and a pressing force is applied to this preshear plate 7A by a coil spring 7B.

Reference numeral 8 denotes a separating member which, in cooperation with the paper feed roller 6, separates the sheets P stacked on the paper feed stacker 7 one by one.

In front of the paper feed roller 6, a wandering paper roller 9 is connected to a discharge roller shaft 1 rotatably suspended between the left and right side plates 4A.
A discharge stacker 11 is provided on the frame body 4 and located in front of the paper feed roller 6. This discharge stacker 11 stores the paper P on which printing has been completed.

l2 is the platen part of the printer main body 2, and its drive shaft 13
A pulse motor M is connected to the motor through a gear train 14A.

Further, reference numeral 14 denotes a platen gear attached to the drive shaft 13, and a passive gear l5 attached to the frame body 4 of the automatic paper feeder 3 is meshed with this. A gear 19A of the tribe disk 19 is engaged with this passive gear 15 via a first gear 16, a second gear 17, and a third gear. The drive disk 19 has a rotatable pawl 2o and is loosely fitted onto the paper feed shaft 5. Further, a clutch disk 2l is loosely fitted onto the paper feed shaft 5, and a pawl gear 22 is located within the clutch disk 2l and is fixed to the paper feed shaft 5. The pawl gear 22 and the drive disk 19 can be freely connected via the pawl 2o. That is, the drive disk 19, the clutch disk 21, and the pawl gear 22 form a clutch 23. In addition, the clutch 23
For example, the details are shown in Japanese Utility Model Application Publication No. 163332/1983.

The third gal 18 is connected to a sixth gal, which is coaxially fixed to the ejecting roller shaft 10 via the fourth gal 24 and the fifth gal 25.
Gear 26 is engaged.

In the figure, a detection sensor 27 is arranged at a predetermined distance from the separating member 8 and detects the tip of the separated pouch P. A PE sensor 28 is provided below the platen section 12. 28A is a Vinci roller and PE sensor 2
8.

In Figure 4, the system? The ffn device 29 has a CPU 30
and ROM31, and ROM31 contains a CP
A program shown in FIG. 5 for controlling U30 is stored. The control device 29 controls the rotational speed of the paper feed roller 6 in the separation process until the leading edge of the separated paper towel P is detected by the detection sensor 27 to change the rotation speed of the paper feed roller 6 in the feeding process after the detection sensor 27 detects The rotation speed of the pulse motor M is controlled to be lower than the rotation speed of 6.

A motor drive 32 is provided on the printer main body 2 side and sends a predetermined number of pulse signals to the pulse motor M in response to a command from the control device 29.

Next, the operation of this embodiment will be explained with reference to FIGS. 5 and 6.

According to the program shown in FIG. 5 and the time chart shown in FIG. 6, the paper is automatically fed and then printed as shown below.

As shown in FIGS. 1 to 3, first, in a state where the automatic paper feeder 3 is attached to the printer main body 2 and the paper feed stack P is stacked and accommodated in the paper feed stacker 7, the printer main body 2 is When the automatic operation switch 33 (shown in FIG. 4) is turned on, the program shown in FIG. 5 starts.

In step S0, it is determined whether initial setting of the automatic paper feeder 3 (setting of the relative positional relationship between the drive disk 19 and the clutch disk 21) is necessary.

When it is determined in step S0 that it is necessary, the process moves to the next step S1, and the control device 29 sends the pulse motor M via the motor drive 32 a rotation angle corresponding to 15 lines in the number of printed lines of the iP. A pulse signal is sent to rotate it. Regarding confirmation of the rotation amount of the pulse motor M in the forward and reverse directions, even if the CPU 30 confirms that a predetermined number of pulse signals have been sent to the pulse motor M, After a predetermined time has elapsed, the CPU 30 determines that the B. '
It is also possible to move to the next step without doing J.

Hereinafter, the forward/reverse rotation amount (LijJ) of the pulse motor M is performed in the same manner as described above, and therefore the explanation thereof will be omitted.

As mentioned above, the pulse motor M is rotated in the reverse direction, and the gear train 1
4A, the platen portion 12 is rotated in the same direction, and the rotation is further transmitted from the platen gear 14 to the drive disk l9 of the clutch 23 via the rotation transmission system, and the drive disk l9 rotates the crunch disk 21 by a predetermined amount. .

? After that, the program proceeds to step S■, where the control device 2
9 to the pulse motor M via the motor drive 32,
A pulse signal is sent to rotate the iP in the forward direction by a rotation angle corresponding to 15 printed lines. As described above, the clutch disk 2l is rotated by a predetermined amount by the drive disk 19, and the clutch 23 is initialized.

When the initialization of the clutch 23 is completed, the program proceeds to Step S3, where the control device 29 gives a reverse rotation command to the pulse motor M at an angle corresponding to, for example, seven lines of printing, and the pulse motor M is rotated. By reversing, the drive disk 19 is rotated by an angle corresponding to seven lines. Along with this, the claw 20 of the drive disk t9
is engaged with the pawl gear 22, and the clutch 23 is turned on.

When the clutch 23 is turned on, the process proceeds to step S4, where the control device 29 gives a forward rotation command to the pulse motor M at an angle corresponding to, for example, four lines of printing, and causes the pulse motor M to rotate forward. . Therefore, the rotation of the pulse motor M is transmitted to the paper feed shaft 5, and the paper feed roller 6 is rotated in the paper feed direction by an angle corresponding to the number of print lines of four.

When this paper feed roller 6 rotates, the paper feed roller 6 and the
Due to the cooperative action of the separation member 8 and the separating member 8, the uppermost sheet of the sheets P stacked on the paper feed stacker 7 is separated and sent out toward the platen section 12. That is, step S4 corresponds to the step of separating the paper sheet P, and the rotational speed of the paper feed roller 6 is 1.

Next, the process proceeds to step S, where the detection sensor 27 determines whether or not there is a leading edge of the separated and sent out sheet P. When it is determined that the leading edge of paper P is present, this signal is
It is sent to the PU 30 and proceeds to step S6, which is a feeding process.

In step S6, the control device 29 causes the pulse motor M to make its forward rotation speed faster than the rotation speed in the separation process (V2), and gives a command to feed the paper until it reaches the platen portion l2. The pulse motor M is rotated in the normal direction, and the rotation is transmitted to the clutch 23 via the rotation transmission system described above, and the paper feed shaft 5 and the paper feed roller 6 are rotated in the normal direction at a rotational speed v2. The rotational speed (2) of the paper feed roller 6 in the feeding process is greater than the rotational speed vl in the separation process. The paper P is sent out to the platen portion l2 by the rotational force of the paper feed roller 6.

This blade P reaches between the platen portion l2 and the vinyl roller 2BA that presses the platen portion l2, and is penetrated by the rotation of both. Then, it is determined whether or not the tip of the balance P is detected by the PE sensor 28 (step 37). If the tip of the handle P is detected in step S7, the process moves to the next step S, and the clutch 23 is rotated forward by an angle equivalent to three lines while remaining in the on state. Thereafter, the process proceeds to step S, where the skew prevention operation for the paper P is executed.

That is, the control device 29 controls the pulse motor M to
A reverse rotation command corresponding to the number of rows is given, the pulse motor M is reversely rotated, and the clutch 23 is turned off by this reverse rotation, and at the same time, the platen section 12 is reversely rotated by four rows. The leading edge of the sheet P held between the rollers 28A is returned to the sheet feed stacker 7 side, and is released from the platen section 12 and the vinch rollers 28A to cause flexure. Thereby, the tip of the handle P is brought into contact with the platen portion 12 in alignment with the tangent to the pinch roller 28A, thereby preventing the handle P from skewing.

When the above-mentioned skew prevention operation is completed, the stenop S,. Then, the control device 29 gives a paper feed command to the pulse motor M to send the paper sheet P with the leading edges aligned to the printing position, and the pulse motor M is rotated in the forward direction. As a result, the paper P, which is in a state of one bite, is sent out to the printing side as the platen portion 12 rotates in the normal direction.

Then, the next step S. Now, it is determined whether the PE sensor 28 has detected the paper P again. When the paper feed P is detected, the process moves to step S1■, where the control device 29 gives a paper feed command corresponding to, for example, 46 lines to the pulse motor M, which drives the pulse motor M in forward rotation. The platen section 12 is rotated to locate the print start position on the paper P. After that, the printer body 2
Performs paper feed control related to printing operations in PE
The printing process is executed until the end of the printing line P is detected by the sensor 28, and the process proceeds to step Sl1. Note that the speed in the printing/trailing paper process is equal to the rotational speed V2 of the paper feed roller 6 in the feeding process.

In step ski, the pulse motor M is, for example, l5.
After continuing to rotate in the normal direction by a rotation angle corresponding to the number of lines, the printed paper P is fed into the discharge stacker 11 by the iJI paper roller 9 and stored therein.

In this way, the printing cycle of the first page is completed, and the printing cycle of the second page is completed.
The page printing cycle begins, but in this case clutch 2
Since the initialization of step 3 has already been performed, the process returns to step S3 and executes step S and subsequent steps.

According to the above configuration, the rotational speed v1 of the paper feed roller 6 is reduced in the separation process to ensure separation of the paper feed P, and the rotational speed of the paper feed roller 6 in the feeding process after the separation process. By making V2 larger than vI, it is possible to shorten the time required to feed the paper P from the automatic paper feeder 3 other than the printing process in the printer main body 2. As a result, one sheet of paper P
The required printing time for one cycle can be shortened.

In particular, when printing in large quantities, the overall printing time can be significantly reduced.

In this embodiment, the rotational speed v2 of the paper feed roller 6 in the feeding process is equal to the speed in the printing/discharging process, but as shown in FIG. The rotational speed of the paper feed roller 6 in the printing/discharging process is set to ■2, and the rotational speed V3 of the paper feeding roller 6 in the feeding process S is set to the speed v2 in the printing/paper discharging process.
Can be made larger. Even in such cases,
While ensuring the separation of paper sheets P, it is possible to shorten the feeding time of paper P in automatic paper feeder 3 other than the printing process in printer main body 2.

In addition, in this example, the separation process (step S.)
Although the rotation speed of the paper feed roller 6 in the separation step is constant at the value of (■), the rotation speed of the paper feed roller 6 during the separation process can be gradually increased as shown in FIG. Even in such a case, it is possible to reliably separate the paper P and shorten the paper feeding time of the automatic paper feeder 3 for operations other than the printing process in the printer main body 2.

Furthermore, in this embodiment, the detection sensor 27 detects the rotational speed (1) of the paper feed roller 6 in the separation process, and the signal is sent manually to the control device 29.
9, the rotational speed (2) of the paper feed roller 6 in the feeding process is made larger than (2), but the detection sensor 27
Even if there is no rotation speed of the paper feed roller 6, the rotation speed of the paper feed roller 6 will be set to 1 during a predetermined time period from the end of step S3, and the paper feed roller 6 will be set to It is also possible to sequentially control the rotational speed of the paper feed roller 6 by storing a program such that the rotational speed of the paper feed roller 6 is set to ■z.

Even in such a case, while ensuring separation of Yogi P,
It is possible to shorten the paper feeding time of the paper feeder P of the automatic paper feeding device 3 other than the printing process in the printer main body 2.

In this embodiment, the paper feed roller 6 is configured to rotate in response to the rotational force from the drive shaft 13 of the printer body 2, but the rotation of the paper feed roller 6 is not referred to as the rotation of the drive shaft l3. In addition to making it independent, the valve motor is directly connected to the paper feed shaft 5, and the rotation speed of this valve motor is controlled. Time etc. can also be controlled by commands from a control device. Even in such a case, it is possible to reliably separate the paper sheets P and to shorten the time required to feed the paper sheets P in the automatic paper feeder 3 in processes other than the printing process in the printer main body 2.

Additionally, in this embodiment, the drive shaft l3 of the printer body 2 is driven by the pulse motor M, but a servo motor may be used instead of the pulse motor M.

〔Effect of the invention〕

As described above, according to the invention described in claims 1 and 2, the rotational speed of the paper feed roller is reduced in the separation process to ensure paper separation, while the paper feed in the feeding process after the separation process is reduced. By increasing the rotational speed of the paper roller, it is possible to shorten the paper feeding time of the automatic paper feeding device other than the printing process in the printer main body. As a result, the required printing time for one cycle of one sheet of paper can be shortened. In particular, when printing in large quantities, the overall printing time can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a printer device according to an embodiment of the present invention. FIG. 2 is a partially sectional front view of the printer device. FIG. 3 is an 8-directional view of FIG. 2. FIG. 4 is an explanatory diagram of the control system of the printer device. FIG. 5 is a flowchart of the printer device. FIG. 6 is a time chart diagram of the printer device. FIG. 7 is another time chart of the rotational speed of the platen section of the same printer. FIG. 8 is yet another time chart of the rotational speed of the platen section of the same printer. FIG. 9 is a longitudinal sectional view of a conventional printer device. FIG. 10 is a partially sectional front view of the printer device. FIG. 11 is an eight-directional view of FIG. 10. FIG. 12 is an explanatory diagram of the control system of the printer device. FIG. 13 is a flowchart of the printer device. FIG. 14 is a time chart of the rotational speed of the platen section of the same printer. [Explanation of symbols of main parts] 1...Printer device 2...Printer main body 3...Automatic paper feeder 6...Paper feed roller 7...Paper feed stacker 8 ・ ・ 1 2 ・ l 3 ・ 27 ・ 28 ・ P ・ ・ Separation member ・ Platen section ・ Drive shaft ・ Detection sensor ・ PE sensor ・ Paper. Figure 3 Figure 4 Figure 5 Figure 7 Figure 8 Figure 9 Figure 1l Figure 12 Figure 14 Figure 13

Claims (2)

[Claims] (1) Consists of a printer main body and an automatic paper feeder. The printer main body has a platen that rotates by its drive shaft, and the automatic paper feeder includes a paper feed stacker that stacks sheets of paper, and It includes a paper feed roller that is placed in front of the paper stacker and rotates by receiving a driving force, and a separation member that works together with the paper feed roller to separate the sheets stacked on the paper feed stacker one by one. In a printer device, the paper is separated one by one from the paper feed stacker of an automatic paper feeder in a separation process, and then the separated paper is sent to the platen part of the printer body in a feeding process. 1. A method for separating and feeding sheets, characterized in that the rotation speed of the paper feed roller in the separation step is lower than the rotation speed of the paper feed roller in the feeding step. (2) Consists of a printer main body and an automatic paper feeder. The printer main body has a platen that rotates by its drive shaft, and the automatic paper feeder has a paper feed stacker that stacks sheets of paper and this feeder. It includes a paper feed roller that is placed in front of the paper stacker and rotates under driving force, and a separation member that works together with the paper feed roller to separate the sheets stacked on the paper stacker one by one. In a printer device, the rotation speed of the paper feed roller during the separation process until the leading edge of the separated paper is separated by a predetermined distance from the separating member is the rotation speed of the paper feed roller in the subsequent feeding process after the leading edge of the paper is separated by a predetermined distance. A printer device comprising: a control device that controls the speed to be smaller than the speed of the printer.