JPS59185670A - Paper feeder for printer - Google Patents

Abstract

PURPOSE:To enable to deal with both a slip paper and a continuous paper by a common controlling circuit and fasilitate handling operations, by a method wherein an action of detecting each paper is automatically changed over interlockedly with a clamping or releasing action of a pressing member for a slip paper, in a printer capable of feeding a slip paper and a continuous paper. CONSTITUTION:An actuator S2a for a switch S2 connected to a substrate of a circuit for controlling a printer by a change-over switch S3 on the basis of the action of a lever 24 is pressed against a continuous paper P2 tensioned by the pressing member 43 and a driving pin 44a, and is operated when the trailing end of the paper passes by, thereby stopping the operation of a recorder. When a continuous paper feeder 41 is detached and the lever 24 is rotated counterclockwise, a pressure roller 25 and a pressure plate 26 are pressed against a platen 22. Simultaneously, a circuit for the switch S3 is changed over by retraction of a projected piece 24a, and a switch S1 is connected to a circuit board.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a paper conveyance device for a printer used in a computer output printer, a word processor, etc., and particularly relates to a tractor feed device for conveying continuous paper having slotted holes, and a tractor feed device for conveying continuous paper having subholes. The present invention relates to a paper conveyance device of a printer that shares a friction feed device for feeding paper.

BACKGROUND ART In general, the feeding formats of paper conveying devices in the various printers described above can be broadly classified into tractor 7 feed, pin feed, friction feed, and the like. Further, some printers are dedicated to one of the above-mentioned feeding formats, while others are equipped to share two or more of them.

The recording paper used in these various printers includes continuous Kt fan fold paper with sprocket holes that can be folded, roll paper wound around a paper tube, etc., and paper cut into various predetermined sizes. Cut paper (kanoto paper) is used. When these recording sheets are loaded into the paper transport device and transported for recording, that is, the paper is fed during the period from insertion to paper ejection, the occurrence of slack, lifting, jamming, wrinkles, etc. of the recording paper must be avoided. It is essential to prevent this and to feed accurately and stably at a predetermined pitch. In particular, when recording output such as figures and tabulations, it is important to ensure feeding accuracy.

For this reason, printers are equipped with various pressure bonding devices in order to keep the recording paper under tension at all times, thereby maintaining feeding accuracy in the recording section.

However, for cut sheets, the pressure bonding device has to be installed on the platen due to the length of the paper.
Continuous paper has a thick conveyance path, and it is desirable to install it as far away from the platen as possible to avoid paper dust Z generated by pressure bonding.

In addition, for both cut paper and continuous paper, when the recording and feeding force continues to be 1 and the trailing edge of the paper passes the pressure bonding device, that is, when the paper loses its tension, or just before that,
Recording action must be stopped.

For that purpose, the trailing edge Z of each cut paper and continuous paper
The detection members are separately arranged in the pressure bonding device portion, and detect the presence or absence of paper, and control the recording device accordingly! I'm taking it.

Part 1 illustrates a printer with both a tractor feed mechanism and a friction feed mechanism for cut sheets.
To explain with a diagram, in the printer 1, the cut sheet P
1 is manually inserted along the paper feed guide member 5, and is pressed and recorded by the press roller 3 and the press plate 6 so that it is fed as one unit in close contact with the platen 2 rotating in a clockwise direction. Thereafter, it is again pressed by the pressure roller 4 and taken out from the printer 1. In this process, the first
When the detection member S1 detects the trailing edge of the paper P, the operation of the recording device (not shown) is stopped by a signal from the switch S1, and the paper is only fed.

A continuous paper conveying device 11 is mounted and attached to the printer 1, a tractor 12 is connected to rotate clockwise in synchronization with the platen 2, and the press rollers 3 and 4 of the printer 1 and the press plate 6 When the pressure is released, the printer 1 becomes able to convey and record the continuous paper P2.

That is, the continuous paper P folded and stacked outside the printer 1
2, after the press member 14 is crimped with the paper feed guide plate 13,
winding the platen 2 along the paper feed guide member 5;
After being recorded, the paper P2 is pulled by the drive bin 12a of the tractor 12 through sprocket holes provided on both sides and fed in the direction of the arrow, passes through the paper discharge tray 15, and is again folded and stacked outside the printer 1.

In this case, the continuous paper P2 is kept under tension by the pressing member 14 and the drive pin 12a of the tractor arm and is brought into close contact with the platen. Therefore, for the same reason as the case of cut paper, the continuous paper P2 When the trailing edge passes through the pressing member 14 and the heel paper loses its tension, the second detection member, that is, the switch S2 detects this state or the trailing edge of the paper P2, and uses the signal to trigger the recording device (not shown). (1) is stopped, and only the feeding of paper P2 is performed.

In this way, the switch S1 and 821-t. The operation must be switched depending on the situation, and the operation is complicated and easy to forget, along with the above-mentioned pressing and releasing of the press roller and press plate.Furthermore,
The spinches S1 and S2 must each have a separate control circuit for the recording device, and currently one printer has a duplicate paper detection device.

OBJECTS OF THE INVENTION The present invention provides a printer configured to be able to convey both cut sheets and continuous sheets, and a detection method that detects each of the sheets in conjunction with the operation of pressing or releasing a pressing member of the cut sheets. The object of the present invention is to provide a paper conveyance device for a printer configured to automatically switch the functions of members.

Structure of the Invention The present invention includes two detection members that respectively detect single sheets and continuous paper, and a VTV tatami paper that can be rotated by the detection members.
This is a first detection member that detects the trailing edge of a cut sheet during the conveyance process in a paper conveyance device for a printer that combines cut paper and continuous paper. and a second detection member that detects the trailing edge of the continuous paper during the conveyance process. This is achieved by a BRINOTA paper conveyance device characterized in that the operations of the first detection member and the second detection member are switchable.

Embodiment FIG. 2 shows a paper conveyance device for a printer according to an embodiment of the present invention.The continuous paper conveyance device is mounted and installed, and the state is switched to the continuous paper conveyance state at -7"3". The margin is shown below.

Continuous paper P2 is pressed by pressing member 43 on paper feed guide plate 42.
, the platen n is wound along the paper feed guide member 4, and is pulled by the drive pin 44a of the tractor a and transported out of the printer 21 via the paper discharge tray 45. In this case, as shown in FIG. 3, the second
, that is, the actuator S2a of the switch S2
passes through the window 42at provided in the paper feed guide plate 42 and comes into pressure contact with the continuous paper P2, which is tensioned by the pressing member 43 and the drive bin 44a, and as the trailing edge passes, the actuator S2a is actuated to record the paper. It acts to stop the operation of the device.

Next, when the continuous paper conveying device 41 is removed from the printer 21 and the lever is rotated counterclockwise, the first pressing lever rotates the shaft 23m clockwise, so that the pressing roller δ on the first pressing lever is rotated. and the pressure plate is the platen 22
At the same time, as the projection 24a of the lever U is retracted, the circuit of the switch S3 is switched, and the first detection member, that is, the switch S1 is connected to the circuit board as shown by the dotted line in FIG. Further, the second pressing lever n is also released from the locking device C (not shown), and the shaft 2'7a is rotated counterclockwise, so that the pressing roller n presses the platen 4. The first and second detection members include other contacts,
Various sensors can be used regardless of contact. For example, a reflective type 7 sensor can also be used.

As a result, the printer is switched to a state in which cut sheets t are transported, and the cut sheets manually inserted along the paper feed guide member 4 are fed in close contact with the platen 22 as one unit. After being recorded and recorded, the pressing roller 28
After that, it is taken out from Burinota 2L. During this process, the actuator Sla of the switch S1 was in pressure contact with the cut sheet through the window 29a provided in the paper feed guide member 4.
is the groove 2 formed in the platen ρ through which the trailing edge of the cut sheet passes.
2.The sui-nochi S1 enters the milk and the resulting displacement causes the suinochi S1 to stop the operation of the recording device.

In this way, the two first and second detection members, that is, the switches S1 and S2 are arranged according to the type of paper,
If either one of them is connected to the control circuit through one switching unit/one D material switch 83K, only one circuit is required to control the recording apparatus.

The above-mentioned lever can be operated manually or automatically in conjunction with the attachment/detachment of the continuous paper conveying device 410).
It can also be applied to a paper conveying device of a printer having a built-in feeding function.

Effects of the Invention The present invention provides a printer configured to be able to convey both cut sheets and continuous sheets, in which two detection members for detecting the rear edge of each sheet are linked to switching of a pressing member of the printer. This makes it possible to automatically select one of the two and process the resulting signal using a common control circuit. That is, according to the present invention, a conveyance device that is easy to handle and has a simple function and can be used for printer single sheets and continuous paper has been realized.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing a paper conveyance path in a U printer. FIG. 2 is a schematic diagram of a Burinota paper conveying device according to the present invention. FIG. 3 is a diagram illustrating switching of the detection member according to the present invention. 21...Burinota 22...Platen n...il push EE lever...lever...protrusion 25.28--
・Press roller part...Press plate 4...Paper feed guide member 41...Continuous paper conveyance device 42...Paper feed guide plate 4
3...pressing member required...tractor 44a-driving pin 45...sheet discharge tray Sl. s2,S
3... Switch Sla, 32a... Actuator P1... Slip paper P2... Continuous paper -361-.

Claims (3)

[Claims] (1) In the Burinota paper conveyance device for single sheets and continuous paper, there is a first detection member that detects the trailing edge t with Th for single sheets, and a second detection member that detects the trailing edge during the conveyance process of continuous sheets. This paper conveying device for a printer is characterized in that it is provided with two members and the operation of a first detection member and a second detection member can be switched. (2) The dual-purpose printer includes a printer having a cut sheet conveying device in which a cut sheet pressing member is arranged, and a printer that can be removably mounted on the printer, and a continuous sheet conveying tractor and a continuous sheet pressing member. Consisting of the installed continuous paper conveyance device 'PI? @'Scope of patent visit 1st
The paper conveyance device of the printer described in Section 1. (3) A patent characterized in that the first detection member and the second detection member are switched and leaked in conjunction with the pressure of a cut paper pressing member or the rotation of a lever that releases the pressure. A paper conveyance device for a printer according to claim 1 or 2.