JPH0624601A - Sheet conveying device - Google Patents

Abstract

PURPOSE:To enhance the durability of a sheet conveying device in which a feeding device and a conveying device, constituted of a pair of rollers, are arranged sequentially on a conveying passage for a sheet body. CONSTITUTION:A detecting means 32 for detecting presence of a sheet body 3 in a conveying device 11 is provided. An inoperativeness imparting means for making a feeding device 10 inoperative when the sheet body 3 is detected by the detecting means 32 is provided, and a roller 12 of the feeding device 10, which is reduced in speed than the conveying device 11 in order to prevent a jam, is prevented from slipping with respect to the sheet body 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device used for conveying a sheet body such as a printer device or a cutter device.

[0002]

2. Description of the Related Art In a high-performance printer device, cutter device, or the like, a sheet conveying device is provided for automatically sequentially conveying the sheet bodies. This sheet conveying device is provided with a feeding device and a conveying device that press-contact a pair of feed rollers each of which is rotatably supported and at least one of which is connected to a drive source, and the feeding device and the conveying device are provided. The structure is such that the sheets are sequentially arranged on the conveying path.

A conventional example of such a sheet conveying apparatus will be described with reference to FIGS. 6 and 7. First, a sheet transporting device 1 which is a sheet transporting device exemplified here is formed as a part of a receipt printer 2 of an electronic cash register (not shown), and a transporting path 4 for a receipt sheet 3 which is a sheet body thereof. The line head 5 is arranged above.

First, in the sheet conveying device 1 of the receipt printer 2, the conveying path 4 communicating from the sheet feeding port 6 to the sheet discharging port 7 is formed by a pair of guide plates 8 and 9, and the sheet feeding port is formed. 6 and a discharge port 7 facing each other
0 and the transporting device 11 have a structure in which driving rollers 12 and 13 which are feed rollers and driven rollers 14 and 15 are pressed against each other. Here, these driven rollers 14,
Reference numeral 15 denotes a shaft that can rotate freely and is biased toward the drive rollers 12 and 13 by a spring plate 16 and a coil spring 17, respectively. These drive rollers 12 and 13 are gear trains 18 and 19 and a belt drive mechanism. Two
When 0 or the like, the stepping motor 21 which is one drive source is commonly connected and driven to rotate. It should be noted that in the paper transporting device 1 of the receipt printer 2, the transporting device 11 is controlled by the gear ratio of the gear trains 18 and 19.
The driving roller 13 of the feeding device 10 is the driving roller 12 of the feeding device 10.
It is designed to rotate slightly faster.

Further, in the sheet conveying device 1 of the receipt printer 2, the receipt sheet 3 in the feeding device 10 is received.
A detection switch 22 for detecting the presence / absence of the receipt sheet 3 is arranged below the sheet feeding port 6, and a detection unit for detecting the presence / absence of the receipt sheet 3 in the conveying device 11 is a drive circuit of the stepping motor 21 in this case. And a control circuit (both not shown).

First, the operation of setting the receipt paper 3 in the paper transporting device 1 of the receipt printer 2 in such a configuration will be described below. First, when the receipt paper 3 is manually inserted into the paper feed port 6 of the paper conveyance device 1, the receipt paper 3 is detected by the detection switch 22 and the driving of the stepping motor 21 is started. The driving rollers 12 and 13 of the feeding device 10 and the conveying device 11 are rotationally driven by the driven roller 1
4, 15 are driven to rotate. Therefore, these feeding devices 10
When the receipt paper 3 sequentially transported by the transport device 11 and the transport device 11 reaches the position of the paper exit 7, the drive of the stepping motor 21 is stopped at this point, and the receipt printer 2 enters the standby state. In the sheet conveying device 1 of the receipt printer 2, the timing control of the driving stop of the stepping motor 21 as described above is performed by the control circuit counting the number of steps of the driving circuit from the start of the driving. .

Therefore, when the receipt printer 2 issues a receipt (not shown), the receipt paper 3 is set in advance in the transport path 4 as described above, and thus the stepping motor 21 is operated in this state. Driving rollers 12 and 1 for the feeding device 10 and the conveying device 11 by the driving force
3 will be rotationally driven. Then, since the receipt paper 3 pressed by the driven rollers 14 and 15 of the drive rollers 12 and 13 is sequentially conveyed, the line head 5 prints the product name, the selling price, etc. on the conveyed receipt paper 3. The receipt is issued by doing so.

In the sheet conveying device 1 of the receipt printer 2, the conveying device 11 has the gear ratio of the gear trains 18 and 19.
By rotating the driving roller 13 of the feeding device 10 at a speed slightly higher than that of the driving roller 12 of the feeding device 10, the feeding device 10 and the conveying device 11 stretch the receipt sheet 3 to guide the guide plates 8 and 9.
Prevents the occurrence of jams inside.

[0009]

In the above-described sheet conveying device 1 of the receipt printer 2, the conveying speed of the conveying device 11 is set to the feeding device 1 in order to prevent the receipt paper 3 from being jammed.
It is slightly faster than 0.

In the sheet conveying apparatus 1, the driving rollers 12 of the sheet feeding apparatus 10 are minute with respect to the receipt sheet 3 due to the difference in the conveying speed between the sheet feeding apparatus 10 and the sheet conveying apparatus 11 as described above. Since it slips, this drive roller 1
2 and the burden on the stepping motor 21 is increased, and the durability is reduced.

[0011]

A feeding device and a feeding device are provided which are in pressure contact with a pair of feed rollers, each of which is rotatably supported and at least one of which is connected to a drive source. The feeding device and the feeding device are provided. In a sheet conveying device in which and are sequentially arranged on the conveying path of the sheet body, a detecting means for detecting the presence or absence of the sheet body in the conveying device is provided, and when the detecting means detects the sheet body, the feeding device is invalidated. An invalidating means is provided.

[0012]

When the detecting means detects the sheet body in the conveying device, the invalidating means invalidates the feeding device, so that the sheet body set in the conveying path is conveyed only by the conveying device, so that a jam occurs. In addition, since the sheet body does not slip with respect to the feed roller of the feeding device which is slower than the conveying device in order to prevent such a jam, the feed roller is not worn or the drive source is damaged. The burden can be reduced.

[0013]

Embodiments of the present invention will be described with reference to FIGS. First, the sheet transporting device 23, which is the sheet transporting device of this embodiment, is mechanically formed as a part of a receipt printer 24 of an electronic cash register (not shown) as illustrated in FIGS. The line head 5 is arranged on the conveyance path 4 of the receipt paper 3 which is the sheet body.

First, in the sheet conveying device 23 of the receipt printer 24, the conveying path 4 communicating from the sheet feeding port 6 to the sheet discharging port 7 is formed by a pair of guide plates 8 and 9, and is connected to the sheet feeding port 6. The feeding device 10 and the conveying device 11 which are arranged to face the paper discharge port 7 have a structure in which the driving rollers 12 and 13 and the driven rollers 14 and 15 which are feed rollers are pressed against each other. Here, these driven rollers 14 and 15
Is rotatably supported and is pressed against the drive rollers 12, 13 by a spring plate 25 and a coil spring 17, and these drive rollers 12, 13 are connected to a gear train 18,
19, the belt drive mechanism 20 and the like are commonly connected to the feed motor 26, which is one drive source, and are rotationally driven. In the paper transporting device 23 of the receipt printer 24, the drive roller 13 of the transporting device 11 rotates slightly faster than the drive roller 12 of the feeding device 10 due to the gear ratio of the gear trains 18 and 19. Has become.

Further, in the sheet conveying device 23 of the receipt printer 24, the spring plate 25 in which the driven roller 14 of the feeding device 10 is pressed against the driven roller 14 at its front end portion.
Is rotatably supported at the rear end of the spring plate 25, and an arm 27 protruding downward from the rear end of the spring plate 25.
On the slider 29 of the solenoid 28 and the coil spring 3
0 and 0 are connected from the front and back. By doing so, in the paper transporting device 23 of the receipt printer 24, the roller support mechanism 31 that supports the driven roller 14 of the feeding device 10 so as to come in contact with and away from the drive roller 12 is provided with the spring plate 25. It is formed of the solenoid 28 and the coil spring 30. Further, in the paper transporting device 23 of the receipt printer 24, the detection switch 22 for detecting the presence or absence of the receipt paper 3 in the feeding device 10 is arranged below the paper feed port 6, and the transporting device 1
A photo sensor 32, which is a detection unit that detects the presence or absence of the receipt paper 3 in the sheet 1, is arranged above the paper discharge port 7.

The receipt printer 24 has a circuit (CPU) as shown in FIG.
ssing Unit), RAM (Random Access Memory) and RO
The line head 5, the feed motor 26, and the solenoid 2 are provided in a control unit 33 including an M (Read Only Memory) or the like.
8, detection switch 22, the photo sensor 32, communication I
/ F (Inter / Face) 34 and the like are connected. For example, a control unit (not shown) of an electronic cash register is connected to this communication I / F 34. Therefore, in the receipt printer 24, an invalidating unit that drives the roller support mechanism 31 in a direction in which the rollers of the feeding device 10 separate when the photo sensor 32 detects the presence or absence of the receipt paper 3 in the transport device 11, The control unit 33
Is formed by.

In such a configuration, first, the receipt paper 3 is loaded into the paper transport device 23 of the receipt printer 24.
The operation for setting the will be described below with reference to the operation process chart of FIG. 4 and the flowchart of FIG.

First, in the paper transport device 23, as shown in FIG.
As illustrated in (b), since the driving of the solenoid 28 is normally stopped, the lower end of the arm 27 of the spring plate 25 is pulled leftward in the figure by the tension of the coil spring 30, and the spring plate 25 is supported. The driven roller 14 of the feeding device 10 is lowered and separated from the drive roller 12. Therefore, when the receipt paper 3 is manually inserted into the paper feed opening 6 in this state, the detection switch 22 detects the receipt paper 3 and the control unit 33 starts driving the feed motor 26 and the solenoid 28.

Then, the slider 2 of this solenoid 28
Since 9 pulls the lower end of the arm 27 of the spring plate 25 to the right in the figure against the tension of the coil spring 30,
As illustrated in FIG. 3A, the driven roller 14 of the feeding device 10 supported by the spring plate 25 moves up to press the receipt paper 3 against the drive roller 12. Therefore, in this state, the driving force of the feed motor 26 causes the driving rollers 12 and 13 of the feeding device 10 and the conveying device 11 to move.
Is driven to rotate and the driven rollers 14 and 15 are driven to rotate, so that the receipt paper 3 is sequentially transported on the transport path 4.

When the receipt paper 3 conveyed by the feeding device 10 and the conveying device 11 reaches the sheet discharge port 7 in this way, the photo sensor 32 detects the receipt paper 3 and the control unit 33. Stops the drive of the feed motor 26 and the solenoid 28. Then, the conveying device 11 stops while holding the receipt paper 3 by the rollers 13 and 15, and as illustrated in FIG. 2B, the feeding device 10 causes the rollers 12 and 14 to move from the receipt paper 3 to the receipt paper 3. It will stop in the separated state.

In this way, in the receipt printer 24, the receipt paper 3 passes through the gap between the separated rollers 12 and 14 of the feeding device 10 and is held by the rollers 13 and 15 of the conveying device 11. Has become. Therefore, a receipt (not shown) is received by the receipt printer 24.
Is issued, the driving rollers 12, 1 of the feeding device 10 and the conveying device 11 are driven by the driving force of the feed motor 26.
Even if 3 is rotationally driven, the receipt paper 3 is conveyed by the transport device 11
Only the rollers 13 and 15 of FIG. Therefore, since the control unit 33 drives the line head 5 in synchronization with the conveyance of the receipt paper 3, the line head 5 prints the product name, the selling price, etc. on the receipt paper 3 to issue the receipt.

That is, in the sheet conveying device 23 of the receipt printer 24, the receipt sheet 3 inserted into the paper feed port 6 is conveyed to the conveying device 11 by the rollers 12 and 14 of the feeding device 10, and the conveying device 11 When the receipt paper 3 is held, the rollers 12 and 14 of the feeding device 10 separate from each other, so that the receipt paper 3 set in the transport path 4 is only transported by the transport device 11. By doing so, the receipt paper 3 set in the transport path 4 is transported only by the transport device 11 in the paper transport device 23, so that the receipt paper 3 is curved in the guide plates 8 and 9. The occurrence of jams is prevented. Further, in the paper transport device 23, the receipt paper 3 as described above is used.
The receipt paper 3 is attached to the drive roller 12 of the feeding device 10 that is slower than the conveying device 11 in order to prevent jamming of the receipt paper 3.
Are less likely to come into contact with each other, the wear of the drive roller 12 and the load on the feed motor 26 are reduced, and the durability is improved.

In the receipt printer 24 of the present embodiment, the photo sensor 32 is arranged as the detecting means in the vicinity of the conveying device 11, but the present invention is not limited to the above structure and the conventional example. Receipt printer 1
It is also possible to form the detection means for detecting the presence / absence of the receipt paper 3 by a drive circuit or a control circuit of the feed motor 26 as exemplified in FIG.

[0024]

As described above, the present invention is provided with a feeding device and a feeding device which are in pressure contact with a pair of feed rollers each of which is rotatably supported and at least one of which is connected to a drive source. In a sheet conveying device in which an apparatus and a conveying device are sequentially arranged on a conveying path of a sheet body, a detecting unit for detecting the presence or absence of the sheet body in the conveying device is provided, and when the detecting unit detects the sheet body, the sheet feeding is performed. By providing the invalidating means for invalidating the device, the sheet body to be set in the transport path is conveyed to the conveying device by the feeding device, and the feed roller of the feeding device separates when detected by the detecting means, The sheet set in the transport path is transported only by the transport device, preventing jams,
Further, in order to prevent such a jam, the sheet body does not slip with respect to the feed roller of the feeding device whose speed is slower than that of the conveying device, so that the wear of the feed roller and the load of the driving source are reduced. It has an effect that it can contribute to the improvement of durability.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view.

FIG. 3 is a block diagram.

FIG. 4 is a vertical sectional side view showing the operation of the enlarged main part.

FIG. 5 is a flowchart.

FIG. 6 is a perspective view showing a conventional example.

FIG. 7 is a vertical sectional side view.

[Explanation of symbols]

 3 Sheet Body 4 Conveying Path 10 Feeding Device 11 Conveying Device 12 to 15 Feed Roller 23 Sheet Conveying Device 26 Drive Source 32 Detecting Means 33 Invalidating Means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Kawaguchi 570, Ohito, Ohito-cho, Takata-gun, Shizuoka Tokyo Electric Co., Ltd. Ohito factory (72) Inventor Tomomi Iijima 570, Ohito, Ohito-cho, Shizuoka Prefecture Tokyo Denki Ohi Factory Co., Ltd.

Claims (1)

[Claims] 1. A sheet feeding device and a sheet feeding device, wherein a pair of feed rollers rotatably supported and at least one of which is connected to a drive source are in pressure contact with each other, and a sheet feeding device. In the sheet conveying device sequentially arranged on the conveying path, a detecting unit for detecting the presence / absence of the sheet body in the conveying unit is provided, and when the detecting unit detects the sheet body, the invalidating unit for invalidating the feeding device. A sheet conveying device characterized by being provided with.