JPH0369379A - Paper feeder in printer - Google Patents

Abstract

PURPOSE:To ensure the selective use of continuous paper and cutform paper by a method wherein a guide plate which changes over the junction to a feed path and is energized by its own weight to shake so that the tip end thereof blocks a continuous paper path is mounted on the junction point of the continuous paper path and a cutform paper path. CONSTITUTION:On the junction point of a continuous paper path Cc and a cutform paper path Cs, a guide plate 24 is mounted. The guide plate 24 is formed so that the position of the center of gravity thereof is near a platen 2 in comparison with the position of a pivot pin 25. The guide plate 24 is energized by its own weight to shake, whereby the tip end thereof comes into contact with a paper guide plate 6 to block the continuous paper path Cc as well as connect the cutform paper path Cc to a feed path Cm. This can be changed over to such a state that the continuous paper path Cc is connected to the feed path Cm by shaking the guide plate 24. As a result, when continuous paper Pc is used, the leading end of the continuous paper Pc shakes the guide plate 24 to connect the continuous paper path Cc to the feed path Cm, and the tip end of the guide plate 24 appropriately presses the leading end of the continuous paper Pc against the paper guide plate 6 to prevent the leading end from being folded or jammed. When cutform paper Ps is used, the occurrence of wrinkle at the trailing end is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] Table 1 of the present invention relates to a paper feed device for a printer that can selectively use continuous paper and cut paper.

[Prior Art] Conventionally, printer paper feeding devices have been used that can selectively use either continuous paper or cut paper. In order to be able to selectively use such a device, a paper guide plate 52 is arranged on the extension line of the pin tractor 50 as shown in FIG. A paper guide 54 for paper sheets is provided above the pin tractor 50, and the paper guide plate 52 is positioned on an extension line of the paper guide 54 to form a continuous paper path for paper sheets. As a result, the continuous sheet path and the single sheet path are merged and communicated with the transfer path formed in the space between the platen 56 and the paper guide plate 52. When using ledger paper, continuous ledger paper is set on the pin tractor 50 and passed through the continuous ledger route and the transport route.Also, when cut paper is used (the single paper route and the transport route are I am trying to pass the route.

[Problems to be solved by the invention] However, with these conventional devices, 11
L When using cut paper, if the end of the cut paper approaches the merging point and the reverse feed is performed in that state, will the cut paper be sent to the cut route or to the continuous route? I didn't understand Also, special 1:.

If the width of the cut sheet is wide, the end of the cut sheet will appear wavy, so if it is fed backwards, it will
As shown in Figure 3, there is a problem that the end of the paper hits the edge of the paper guide 54, causing the end of the cut sheet to become wrinkled.Furthermore, when continuous paper is used, the printing ends. There are cases where continuous paper is cut off and operation is temporarily stopped with the leading edge of the continuous paper wrapped around the platen. As time elapses in this wrapped state, the leading edge of the continuous sheet forms a curling habit in accordance with the shape of the platen 56. In this state, the operation is restarted and, for example, in order to insert a cut sheet, the continuous sheet is reversely fed and temporarily evacuated to the continuous sheet path. Then, when the continuous paper is transported by the pin tractor 56 in order to load it onto the platen 56 again, the leading edge of the curled continuous paper gets caught in the platen 56 as it is, and a jam occurs in which the leading edge is folded over. Therefore, the present invention aims to solve the above problem,
To provide a paper feeding device for a printer that can reliably selectively use continuous paper and cut paper.

[Means for Solving the Problems] In order to achieve the above object, the present invention adopts the following configuration as a means for solving the problems. That is, the paper is arranged along the width direction of the paper on the transport path of the paper. A continuous paper path, through which the continuous paper is transferred from a pin tractor, which has a platen that is rotatably driven and is capable of transporting the continuous paper using a plurality of pins that are movable in rotation, and a continuous paper path above the continuous paper path. In a paper feeding device of a printer that selectively uses the continuous paper and the single cut paper by merging the single paper route through which the single paper passes and communicates with the transfer route, the continuous paper route and the single cut paper are connected to the transfer route. A guide plate is provided at the merging point with the platen, the guide plate swinging around an axis parallel to the platen to switch the merging with the transfer path and being biased so that its tip swings in a direction to block the continuous feeding path. This is the configuration of a paper feed device for a printer characterized by this.

[Function] The paper feeding device of the printer having the above configuration (the upper guide plate swings at the merging point, and the tip of the biased guide plate blocks the continuous sheet path and communicates the ticket path with the transport path. Then, when using continuous paper (tomo), the continuous paper is set on the pin tractor, the pin tractor transports the continuous paper to pass through the continuous paper path, and the leading edge of the continuous paper is guided at the confluence point. The guide plate is swung with the tip of the plate resisting the biasing force to communicate the continuous paper route and the transfer route.Also, in this limit, the tip of the guide plate presses the leading edge of the continuous paper, so that the leading edge of the continuous paper is To ensure that even if it is curled up, it passes through a transfer route.

On the other hand, when using cut paper (t,, even if you set the cut paper by passing it through the cut path and then feeding it backwards,
Since the guide board blocks the continuous paper path, the end of the cut sheet will not get caught.

[Example] Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a schematic diagram of a paper feeding device of a printer according to an embodiment of the present invention. As shown, Punonta case 1
(Above) A platen 2 is rotatably supported by a platen shaft 3 along the width direction of the paper on the transport path Cm of the paper.A platen gear 4 is fixed to one end of the platen shaft 3. A paper guide plate 6 rotatably supporting a plurality of paper press rollers 5 is disposed below the platen 2. A print head 7 that can reciprocate along the platen 2 is disposed on the front side of the platen 2. It is set up.

On the other hand, an upper tractor unit 8 is provided upstream of the platen 2 in the paper transport direction.

The tractor unit 8 includes a transmission shaft 9 and a guide shaft 10 that extend parallel to the platen 2 and are rotatably supported by the printer case 1. On both shafts 9 and 10, movement adjustment is made in the width direction of the continuous paper Pc. A possible pair of left and right pin tractors 11 are supported.

Each pin tractor 111 has a (
A pin belt 15 having a plurality of pins 15a that can move in a circular motion is hung thereon.

The tractor frame 12 is also provided with a paper holding plate 16 which can be switched between a collapsed position and an upright position.

As shown in FIG. 1, a tractor gear 17 is fixed to the end of the transmission shaft 9 on the outside of one of the pin tractors 8. Moreover, this tractor gear 17 includes a pair of intermediate gears 18.1 rotatably supported by the printer case 1.
It is meshingly connected to the platen gear 4 via 9.

Further 1: A motor gear 21 of a paper feed motor 20, which serves as a drive source that can be rotated in forward and reverse directions, is meshingly connected to one of the intermediate gears 18.Transmission from the intermediate shaft 18 to the transmission shaft 9 A well-known clutch mechanism (not shown) is provided in the path to selectively transmit the rotation of the tag paper feed motor 20 to the pin tractor 8.

In this embodiment, the gears 4, 18, and 19 constitute a transmission mechanism. When the paper feed motor 20 is driven, its rotational motion is transmitted to the platen 2 and the pin tractor 8.

The paper guide plate 6 is arranged so as to be located on the extension line of the pin tractor 8, and the continuous paper sheet Pc can pass therebetween, thereby forming a continuous paper path Cc. A paper guide 22 is provided so as to overlap above the continuous paper path Cc. This paper guide 22 (t,
Printer case 11: Supported at a predetermined angle by a fulcrum pin 23, a pillar (not shown), and the like. Then, the paper guide plate 6 is placed on the extension line of the upper surface of the paper guide 22.
is arranged so that the cut paper Ps slides on the paper guide 22 to form a cut path Cs. The continuous sheet path Cc and the single sheet path Cs merge on the paper guide plate 6, and the paper guide plate 6 and the platen 2
A transport path Cm is formed by allowing the paper to pass through the space between the two.

1 above at the confluence of the continuous sheet route Cc and the single sheet route Cs.
A guide plate 24 is provided. This guide plate 24 is provided along the axial direction of the platen 2, and fulcrum pins 25 are formed at both ends thereof.

A fulcrum pin 25 is swingably supported by a support arm 26 extending from the printer case 1, so that it can swing around an axis parallel to the platen 2.

Pins 27 are installed at both ends of the guide plate 24 in parallel with the fulcrum pin 25 to prevent the fulcrum pin 25 from coming off the support arm 26.
is provided.

In addition, in this embodiment, the position of the center of gravity of the guide plate 24 is 1t.
It is formed so as to be closer to the platen 2 than the position of the fulcrum pin 25, and is biased by the weight of the guide plate 24 and swings.
The tip of the guide plate 24 contacts the paper guide plate 6, and the continuous paper path C
It is designed to block c. Therefore, by swinging the tag guide plate 24 against the biasing force, the ticket route Cs and the transfer route Cm are communicated with each other, so that the continuous ticket route Cc and the transfer route Cm are connected.
It can be switched so that they communicate with each other. In particular, the guide plate 24 may be configured to swing by being urged in a direction to close the continuous book path Cc using a spring or the like, instead of being urged by its own weight.

Next, the operation of the paper feeding device of the printer of this embodiment will be explained.

First, in a state in which the continuous paper Pc is set by engaging each pin 15a of the pin tractor 8 with the feed hole at the leading end thereof,
The paper feed motor 20 is driven to rotate forward by a predetermined amount in order to apply a predetermined amount of normal feed to the continuous paper Pc. As a result, the rotational motion is transmitted to the pin tractor 8 via each gear 4.17 to 19.21. be transported. When the leading edge of the continuous paper sheet Pc to be transferred comes into contact with the guide plate 24, the guide plate 241 is swung against the biasing force due to its own weight, as shown by the arrow in FIG. are communicated. Then, the continuous sheet PC is sent in the forward direction via the continuous sheet path CC, the transfer path Cm between the platen 2 and the paper guide plate 6.

While the print head 7 is driven, the pin tractor 8 and platen 2 are driven by the paper feed motor 20, and predetermined printing is performed on the continuous paper Pc.

After printing is completed, the continuous paper Pc is cut off, the power is turned off, and the paper is left as it is for a predetermined period of time, for example.

Then, since the leading edge of the continuous paper Pc remains wrapped around the platen 2, the leading edge becomes curly. In this state, the power is turned on again and the operation is resumed.In order to use the single-sheet paper Ps, the paper feed motor 20 is rotated in the reverse direction to temporarily retreat the continuous paper Pc from the platen 2, and the pin tractor 8 evacuate until In this state, a clutch mechanism (not shown) is operated to cut off power transmission between the paper feed motor 20 and the pin tractor 8, and the cut sheet Ps is loaded onto the platen 2. Thereafter, in order to use the continuous paper Pc again, the clutch mechanism is connected and the paper feed motor 20 is driven in the forward direction to transport the continuous paper Pc from the pin tractor 8.

Then, the leading edge of the continuous paper Pc (top) is curled into a round shape, so it is transferred with the leading edge flipped up, but when the leading edge contacts the guide plate 24, a biasing force corresponding to the guide plate 24's own weight is applied. The paper is pressed appropriately against the paper guide plate 6. As a result, the curled tip (flattened) is sent to the transfer path Cm between the platen 2 and the paper guide plate 6.

On the other hand, when using single-sheet paper Ps,
c from the pin tractor 8, put the cut sheet PS on the paper guide 22, and slide it downward. At this time, the guide plate 24 (upper part) swings due to the urging force due to its own weight, and its tip contacts the paper guide plate 6 to block the continuous paper path Cc. It passes over the plate 24 and is sent to the transfer path Cm between the platen 2 and the paper guide plate 6.Then, by rotating the platen 2, the cut sheet Ps is sent to a predetermined position.
When the print head 7 is driven, the platen 2 is driven by the paper feed motor 20, and predetermined printing is performed on the cut sheet Ps.

During this printing, when performing color printing or printing enlarged characters, select 1:.

The cut sheet Ps may be fed backwards. At that time, even if the end of the cut sheet Ps has reached the transfer path Cm between the platen 2 and the paper guide plate 6, the end of the cut sheet Ps when it is fed backwards is at the tip of the guide plate 24. You can be scooped up. Therefore, when reversely fed 1:, the cut sheet Ps is reliably returned to the cut path Cs side. Also, even if the cut sheet P
Even if the width of the sheet Ps is wide and the end is wavy, the end of the cut sheet Ps is scooped up by the tip of the guide plate 24, so the end will not be crumpled.

As mentioned above, when using the paper feeding device 1 of the printer of this embodiment, the leading edge of the continuous paper Pc swings the guide plate 24 against the urging force. In this way, the continuous book path Cc and the transfer path Cm are communicated with each other.

At this time, the leading edge of the guide plate 24 appropriately presses the leading edge of the continuous paper Pc against the paper guide plate 6, and even if the leading edge of the continuous paper Pc is curled, it is flattened and connected between the platen and the paper guide plate 6. This prevents the occurrence of jams in which the ends of the paper are bent over each other.

On the other hand, when using the cut sheet Ps (above), even if the cut sheet Ps is fed backwards during printing, the guide plate 24 blocks the continuous paper path Cc, so the end of the cut sheet PS is not guided. Board 2
It can be scooped up with the tip of 4.

Therefore, when reversely fed, the cut sheet Ps is reliably returned to the cut path Cs side. Furthermore, even if the cut sheet Ps has a wide width and the end is wavy, the end of the cut sheet Ps will be scooped up by the tip of the guide plate 24, so the end will not be wrinkled. There is no.

The present invention is not limited to these embodiments in any way, and may be implemented in various forms without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, the printer paper feeding device of the present invention (
Top: The guide plate swings and the biased tip of the guide plate blocks the continuous paper route, so when using continuous paper, the tip of the continuous paper resists the force and pushes the guide plate It is oscillated to connect the continuous sheet path and the transfer path, and the tip of the guide plate appropriately presses the continuous sheet paper to flatten it and send it to the transfer path, preventing the occurrence of jams where the leading edge folds over. When using slip paper, there is a problem with it.Even if the slip paper is fed backwards during printing, etc.
If the end of the cut sheet is scooped up at the tip of the guide plate, the tag is returned to the ticket route side.Also, even if the cut sheet is wide and the end is wavy, the end will be wrinkled. This has the effect that it will not cause any damage.

[Brief explanation of drawings]

Fig. 1 shows a partially broken side view of a paper feed device of a printer as an embodiment of the present invention. Fig. 2 shows a partially broken side view of a pin tractor of this embodiment. Fig. 3 shows a partially broken side view of a paper feed device of a conventional printer. It is a diagram. 1...Printer case 2.56...Platen 6
, 52...Paper guide plate 22...Paper guide Pc...Continuous paper Cc...Continuous paper route Cm...Transfer route

Claims (1)

[Claims] The continuous form paper is transported from a pin tractor that has a platen arranged along the width direction of the paper on the paper transport path and is rotationally driven, and is capable of transporting the continuous form paper using a plurality of circularly movable pins. The continuous paper route through which the continuous paper passes and the single paper route through which the cut paper passes over the continuous paper route are merged and communicated with the transfer route, and the continuous paper and the cut paper are selectively used. In the paper feeding device of the printer, the paper feed device swings around an axis parallel to the platen at the merging point of the continuous paper path and the single sheet path to switch the merging with the transfer path, and is energized so that the leading edge A paper feeding device for a printer, characterized in that a guide plate is provided that swings in a direction to block the continuous paper path.