JPS5935772Y2 - Recording paper feeding device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a recording paper feeding device.

2. Description of the Related Art In various recording devices or recording/reading devices, when feeding recording paper, it is necessary to ensure that the feeding direction is always perpendicular to the width of the recording paper.

If the feeding direction meanders, the recorded value or read value will change from the correct value.

For this reason, in the past, it was common to install a pair of sprockets coaxially with the feed drum, and to use recording paper with bar 7 oration at both ends.

According to this, the perforations are used to feed the recording paper through the pawls of the sprocket, so the recording paper is fed without any meandering.

However, according to this kind of usurpation, it is necessary to prepare a sprocket.
In addition, recording paper with perforations must be used.

In addition, only recording sheets with a width matching the spacing between the paired sprockets can be used, and recording sheets of different widths cannot be fed correctly.

The purpose of this invention is to correctly feed recording paper regardless of the width of the recording paper without using a sprocket.

An embodiment of this invention will be described with reference to the drawings.

1 is a recording paper, 2 is a feed drum, 3 is a screw roller, and 4 is a stopper.

The feed drum 2 is rotated in the direction of arrow A by a suitable driving source, and a screw roller 3 is arranged so as to be pressed against the feed drum 2 by a spring or the like.

This pressure brings the surface of the thread 3A of the screw roller 3 into pressure contact with the periphery of the feed drum 20.

As a result, the screw roller 3 is rotated by the rotation of the feed drum 2.
also begins to rotate in the direction of arrow B.

In the above-mentioned interception, the recording paper 1 is fed between the feed drum 2 and the screw roam 3 so as to be whirled around.

Then, the recording paper 1 is fed by the rotation of the feed drum 2 and the screw roller 3.

However, due to the rotation of the screw roller 3, the screw thread 3A
begins to move in the direction of its axis.

For example, in the example of FIG. 1, the screw thread 3A moves to the right.

As a result of this movement, the recording paper 1 in contact with the screw thread 3A is also given a force in the right direction (in the direction of arrow C) due to friction, and as a result, the recording paper 1 is fed while moving in the same direction. .

Due to this shift, one (right side) edge 1A of the recording paper 1 comes into contact with the stopper 4.

Since the recording paper 1 does not move beyond this contact, the recording paper 1 will eventually come into contact with the edge 1A and be sent while sliding.

Here, if the stopper 4 is installed at a fixed position on the edge 1A of the recording paper 1 when the recording paper 1 is fed by applying a feeding force in a direction perpendicular to the rotational axis of the feeding drum 2, , the edge 1A always passes through its fixed position correctly, and meandering of the recording paper 1 can thereby be reliably prevented.

It should be noted that as the moving distance (lead) of the screw thread 3A when the screw roller 3 makes one revolution increases, the force on the recording paper 1 in the direction of the arrow C increases.

If this force becomes too large, there is a risk that the recording paper 1 will bend and become wrinkled, so it is necessary to set the lead to an extent that prevents this from occurring.

As described above, according to this invention, one edge of the recording paper is fed through a fixed position regulated by the stopper, thus eliminating the need for the conventional recording paper with sprockets and perforations. Moreover, there is no need for recording paper of a certain width,
The effect is that recording paper having an arbitrary width can be fed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of this invention, and FIG. 2 is a side view of the same. 1... Recording paper, 2... Feed drum, 3... Screw roller, 4... Stopper 1A... Edge end.

Claims (1)

[Scope of utility model registration request] A screw roller is brought into contact with a rotatably driven feed drum, and a recording paper is sandwiched between the feed drum and the screw roller to give feed, and when the screw roller rotates, the screw thread is moved in the direction in which the screw thread moves. A recording paper feeding device comprising a stopper that is placed on one edge side of the recording paper, with which this edge comes into contact.