JPH0357518Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roller paper device in which paper is driven by a paper drive means consisting of a drive roller and a driven roller. Such roller paper drive devices are often used in recording devices.

[Conventional technology]

The prior art of this type of device will be explained with reference to FIG. In the figure, 1 is a drive roller, 11 is a drive roller shaft, 2 is a driven roller, 21 is a driven roller shaft, 5 is an operating lever, and 3 is paper.

As shown in FIG.
Since it is driven at both ends, one is provided at each end position. The drive roller 1 at each position is fixed to a drive roller shaft 11, and although not shown, is connected to a paper drive motor and driven in forward and reverse directions. The driven rollers 2 are each locked to a driven roller shaft 21 at a position corresponding to the driving roller 1. The operating lever 5 is used to bring about the engaged and disengaged states of the paper drive means consisting of the driving roller 1 and the driven roller 2. Rotation of the operating lever 5 causes the driven roller shaft 21 to rotate. As a result, the driven roller 2 engages and disengages the drive roller 1. When the paper drive means is not engaged, the paper 3 is attached, and when the paper drive means is engaged, the paper is driven.

However, such an apparatus has a drawback in that the types of paper 3 that can be used are limited. That is, the width of the paper 3 needs to be at least as large as the distance between the two paper drive means fixed to the apparatus.

In order to eliminate this drawback, an apparatus has been proposed in which the parts shown in bold lines in FIG. 2 are added. That is, at least one driven roller 2 is configured to be able to slide on a driven roller shaft 21 so as to accommodate various paper widths, and a driving roller 1 is further provided at a position corresponding to the paper width.

Although this solves the problem of having to limit the number of sheets of paper 3, it does cause problems in operability. To explain in more detail, for example, when this paper drive means is used in a recording device, the driven roller 2 will be placed in a very narrow space because a pen moving mechanism or a cover etc. will be provided. There were some points that were difficult to operate.

[Problem that the invention attempts to solve]

The present invention has been devised in view of the above points and provides a roller paper drive device with improved operability.

[Means for solving problems]

Therefore, in the present invention, a plurality of pairs of two paper driving means corresponding to various paper widths are provided, and engagement and disengagement are performed for each pair. Further, each set is connected to the operating means in relation to each other, so that only one operating means can control the paper drive means of each set. A cam is used as a connecting means between this operating means and each set of paper driving means.

[Effect]

Consider, for example, two pairs of paper driving means (paper A0 size, A3 size) corresponding to respective paper widths.

The first operation of the operating means disengages all sets of paper drive means, creating a paper loading mode. If this paper is A0 size, the second operation of the operating means (operation corresponding to A0 size)
As a result, only the pair of paper drive means corresponding to A0 size paper becomes engaged. The other sets of paper drive means remain disengaged.

When the paper is A3 size, the third operation means
The action corresponding to A3 size is selected.
In this case, only the paper drive means corresponding to A3 size paper is engaged.

When recording is completed and the paper is to be removed, the first operation of the operating means may be selected.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of main parts showing an embodiment of the present invention.

First, the state shown in FIG. 1 will be explained.

Only a pair of paper drive means (paper drive means at both ends) corresponding to the width of the paper 3 is in an engaged state. The paper 3 is driven in the Y-axis direction by this paper drive means, and the recording pen 6 is further driven in the X-axis direction.
Recording is performed by the relative movement of the two.

The engagement and disengagement between the drive roller 1 and the driven roller 2 forming the sheet driving means is achieved by forming the driven roller 2 as a pinch roller.
The driven roller 2 is attached to a driven roller holder 22 and is supported by a driven roller support member 21 via a driven roller attachment 211. To explain further, a driven roller holder 22 equipped with a driven roller 2
is rotatably attached to a driven roller attachment 211 provided at the lower end of the driven roller support member 21 via a pin 212. A spring support 231 is formed in the upper part of the driven roller support member 21, and a spring 23 is applied between the support 231 and the driven roller holder 22. This causes the driven roller 2 to engage the drive roller 1 under appropriate pressure.

A protrusion 23 is further provided on the upper part of the driven roller holder 22. Cams 4 that engage with the protrusions 23 are provided at respective positions on the cam drive shaft 42 in correspondence with each other. An operating lever 5 serving as an operating means is provided at one end of the cam drive shaft 42, and by operating this operating lever 5, an engaged/disengaged state is brought out. The cam 4 is provided with a notch 41, and when this notch 41 and the protrusion 23 provided on the driven roller holder 22 are engaged, the driving roller 1 and the driven roller 2, that is, the paper driving means are engaged. However, when the protrusion 23 and the notch 41 do not engage, the paper driving means is disengaged. When the operating lever 5 is in the B position, that is, in the second operation, the paper drive means at both ends of the three paper drive means shown in FIG. 1 are engaged (cams 4 at both ends and driven roller holders 22 at both ends). interlock)
becomes. When the operating lever 5 is in the A position, that is, in the first operation, each cam 4 rotates approximately 90°. Therefore, the cam 4 and the driven roller holder 22 do not engage with each other, and all paper driving means are disengaged. When the operating lever 5 is set to the C position, that is, the third operation, the cam 4 and the driven roller holder 22 are engaged except for the right end position in FIG. 1, and the two paper drive means on the left side are therefore engaged. do.

By the way, in this embodiment, paper having two widths is considered (A0 size and A3 size in FIG. 1). In this case, two pairs of paper drive means are required to correspond to each paper width, but in this embodiment, one of the paper drive means is common to both sets. The paper drive means provided on the left side is common. Engaging each set of paper drive means for each set,
Disengagement can be achieved by relating the engagement positions of the cams 4 and protrusions 23 provided corresponding to each set. Therefore, the position of the notch 41 of the cam 4 belonging to each group may be set to the same position for each group. Referring to FIG. 1, two notches 41 are provided on the left side, that is, the cam 4 corresponding to the common paper driving means, so as to be substantially opposed to each other (shifted by 180 degrees). One notch 41 is provided in each of the cams 4 corresponding to the two paper drive means on the right side. The notch 41 of the cam 4 corresponding to the paper driving means at the right end corresponds to the lower notch 41 of the cam 4 corresponding to the common paper driving means at the left end. The notch 41 of the cam 4 corresponding to the central sheet driving means corresponds to the upper notch 41 of the cam 4 corresponding to the common sheet driving means at the left end.

When the operating lever 5 described above is set to the A position, all the cams 4 are out of engagement with the driven roller mounting device 22, making it convenient to attach and detach the paper 3.

In the embodiment of the present application, a case has been described in which the driving roller 1 is divided and provided, but it may be provided over the entire paper width.

[Effect of idea]

As described above, according to the present invention, it is possible to obtain a roller paper drive device with a simple configuration and good operability.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention;
FIG. 2 is a configuration explanatory diagram showing a conventional roller paper drive device. 4...Cam, 23...Protrusion, 5...Operation lever.

Claims (1)

[Claims for Utility Model Registration] In a paper drive device of a recording apparatus configured to insert and drive both ends of recording paper of a plurality of widths by a paper drive means consisting of a drive roller and a driven roller, recording of a plurality of widths is possible. When each sheet of paper is loaded into this recording device, one end of each recording sheet is installed at approximately the same common position, and the other end is installed at a different paper width position according to its width, so that the common position of the recording device and the above A driven roller mechanism provided at two or more paper width positions corresponding to the paper width, an operating means for displaying a plurality of operating states, and a driven roller of each of the driven roller mechanisms respectively attached to the operating means. , a cam mechanism that moves these driven rollers up and down according to the operating state of the operating means, and a driven roller of each of the attached driven roller mechanisms is moved to a lower position by the action of each of the cam mechanisms. and a driving roller disposed so that when positioned, an engaged state is formed and paper can be driven, and the operating means disengages the driven rollers of all of the driven roller mechanisms from the driving roller. and two or more operating states in which the driven roller of the driven roller mechanism at the common position and any one of the driven rollers of the two or more driven roller mechanisms at the paper width position are engaged with the drive roller. A roller paper drive device comprising: