JPH06255831A - Conveying device for recording medium - Google Patents

Abstract

PURPOSE:To provide a conveying device having a relatively simple structure and capable of surely conveying a conveyed object such as a recording medium having low mechanical strength and relatively heavy weight. CONSTITUTION:A driving roller 10 connected to a motor 51 and provided with a peripheral face having a high friction coefficient and a mating roller 20 rockably arranged to face the driving roller 10 and provided with a peripheral face having a high friction coefficient are provided with a driving gear section 12 and a mating gear section 22 rotated and engaged with each other respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium such as a magnetic disk or a magneto-optical disk (hereinafter simply referred to as a recording medium) housed in a case between a driving roller and an opposing roller adjacent to the driving roller. The present invention relates to a recording medium conveying device that conveys a recording medium or the like by narrowing the drive roller and rotating the drive roller.

[0002]

2. Description of the Related Art FIG. 6 is a schematic view showing a main part of a conventional recording medium conveying apparatus. In FIG. 6, the transport device is connected to a drive source (not shown), and includes a drive roller 10 having a peripheral surface made of rubber or the like and having a relatively high friction coefficient,
A counter roller 20 facing the drive roller 10 and swingably arranged by a rocking plate 31 having a shaft 32 as a fulcrum and provided with a peripheral surface having a high friction coefficient, and a peripheral surface of the drive roller 10 and the counter roller 20. And a pressing spring 40 that presses the opposing roller 20 (swing plate 31) in a direction to reduce the peripheral surface gap L between the peripheral surface and the peripheral surface. Then, the carrying device operates as follows.

First, the power of the apparatus is turned on, and the drive roller 10 rotates in the direction of arrow 10. Now, a recording medium (not shown), which is an object to be conveyed, is inserted into the circumferential gap L from above in the drawing. Here, since the facing roller 20 is pressed by the pressing spring 40 in the direction to reduce the peripheral surface gap L as described above, the recording medium is pressed against the peripheral surface of the driving roller 10, and the frictional force of the recording medium causes the driving roller to rotate. It is conveyed according to the rotation of 10.

It should be noted that the opposing roller 20 is provided with a peripheral surface having a high friction coefficient, like the driving roller 10, not for the purpose of conveying the recording medium by the frictional force, but for the recording conveyed by the driving roller 10. This is for the purpose of preventing the recording medium from being scratched by moving with the medium.

[0005]

Although the apparatus is industrially useful because of its relatively simple structure, it can be transported, that is, the friction coefficient between the driving roller 10 and the recording medium. The pressing force of the opposing roller 20 is limited. In other words, if the friction coefficient is small, or if the pressing force of the opposing roller 20 cannot be increased due to the strength of the recording medium, the drive roller 10 runs idle and the recording medium cannot be conveyed. There is.

This is a particular problem in a recording medium having a low mechanical strength due to its relatively small number of constituent parts, and more particularly in a device of this kind using a relatively heavy magneto-optical disk as a material to be conveyed. Is.

On the other hand, it is conceivable that the opposed roller 20 in the above-mentioned device is also driven to transmit the drive from both sides, but since the opposed roller 20 has a swing structure, a mechanism for transmitting the driving force to the opposed roller 20. Is complicated.

An object of the present invention is to provide a recording medium conveying device having a relatively simple structure that can reliably convey a recording medium having a low mechanical strength and a relatively heavy weight, even if the recording medium is an object to be conveyed. Is.

[0009]

According to the present invention, a drive roller connected to a drive source and provided with a peripheral surface having a high friction coefficient,
An opposing roller that is swingably arranged facing the drive roller and that has a peripheral surface having a high friction coefficient, and a peripheral surface gap between the peripheral surface of the drive roller and the peripheral surface of the opposed roller. In a recording medium conveying device that has a pressing spring that presses the facing roller in a direction of decreasing the size and that conveys a recording medium that is inserted into the circumferential surface gap, the drive roller and the facing roller each rotate. A recording medium transporting device is provided which has gear parts that rotate together and mesh with each other.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording medium conveying apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

[Embodiment 1] FIG. 1 is a perspective view showing a recording medium conveying apparatus according to Embodiment 1. As shown in FIG. In the figure, the same parts as those of the conventional example or the same parts are denoted by the same reference numerals as in FIG.

In FIG. 1, the present conveying device includes a transmission roller 53 and a motor roller (which may be a gear) 52 of a motor 51 which is a drive source provided on a base (not shown).
(Or, the driving roller 10 connected via the transmission roller 53 and the reversing roller 54) and the facing roller 20 facing the driving roller 10 and swingably arranged by a swinging plate 31 having a shaft 32 as a fulcrum. And a pressing spring 40 that is provided on the projecting piece 61 that is a part of the base and that presses the facing roller 20 (oscillating plate 31) in a direction to reduce the gap between the driving roller 10 and the facing roller 20. A plurality of (4 sets in FIG. 1).

Each drive roller 10 comprises a drive roller portion 11 made of rubber or the like and provided with a peripheral surface having a relatively high friction coefficient,
It has a drive roller portion 11 and a drive gear portion 12 that is integrally provided coaxially. Each of the opposed rollers 20 includes an opposed roller portion 21 having a peripheral surface having a high friction coefficient, and an opposed roller portion 21.
And an opposed gear portion 22 that is coaxially and integrally provided. Further, between the drive roller 10 and the facing roller, a conveying path 70 having a surface with a low friction coefficient is provided.
The recording medium 100 is transported along the transport path 70 through the gap between the driving roller portion 11 and the facing roller portion 21 which face each other. The transport path 70 may be constituted by a belt conveyor or the like having a surface with a high friction coefficient that moves linearly in synchronization with the rotation of the drive roller 10.

Next, with reference to FIGS. 2 and 3, the present apparatus will be described in more detail based on the carrying operation.

2 and 3 are top views showing the main part of the present apparatus. FIG. 2 shows the recording medium 100 not inserted and FIG. 3 shows the recording medium 100 inserted.

In FIG. 1, when the power of the apparatus is turned on, the motor roller 52 of the motor 51 rotates, and this rotation is transmitted by the transmission roller 53 (or the transmission roller 53 and the reversing roller 54) to drive the motor. Roller 10,
That is, the drive gear unit 12 rotates together with the drive roller unit 11.

Here, when the recording medium 100 is not inserted, in FIG. 2, the opposed roller 20 arranged so as to face the drive roller 10 and is swingable is the pressing spring 4.
It is pressed in the direction to reduce the peripheral surface gap L by 0. The pressing force is large enough to allow the opposing gear part 22 and the drive gear part 12 facing each other to mesh with each other.

Further, in this device, the tip diameter of the opposed gear portion 22 does not come into contact with the root diameter of the drive gear portion 12 due to the pressing of the pressing spring 40, so that, for example, the pitch circles of each other overlap. A stopper (not shown) that restricts the swing amount of the swing plate 31 is provided. Now, when the swing plate 31 swings until it is regulated by the stopper, the circumferential surface gap L is set to L _o.
And

Further, the reduction gear ratio between both gear parts is 1: 1. Therefore, as the drive roller 10 rotates, the counter roller 20 rotates in the opposite direction at the same rotation speed.

Next, in FIG. 3, even when the recording medium 100 is inserted into the circumferential surface gap L from above in the drawing, the drive gear portion 12 and the counter gear portion 22 are still in mesh with each other, as will be described later. Therefore, the recording medium 100 is conveyed downward in the drawing by the rotation of both the driving roller unit 11 and the opposing roller unit 21.

Here, it is assumed that the thickness t of the recording medium 100 is larger than the L _o . Conversely, L _o is set to a value smaller than the thickness t of the recording medium 100. Therefore, when the recording medium 100 is inserted, the circumferential surface gap L becomes L _t , which is the same as the thickness t of the recording medium 100.

Further, as described above, in order for the drive gear portion 12 and the counter gear portion 22 to mesh with each other even when the recording medium 100 is inserted, the tip circle diameter D of the drive gear portion 12 is required.
h ₁ and the diameter Dh ₂ of the addendum circle of the counter gear part 22 are set to the following conditions.

That is, the diameter of the driving roller portion 11 is set to Dr ₁ ,
If the diameter of the opposed roller portion 21 is Dr ₂ , (Dh ₁ +
Dh ₂ ) / 2> (Dr ₁ + Dr ₂ ) / 2 + L _t .

Further, in order to ensure the meshing of the drive gear portion 12 and the counter gear portion 22 when the recording medium 100 is inserted, the drive gear portion 12 shown by a chain line in FIG.
The pitch circle diameter Dp ₂ pitch diameter Dp ₁ and the counter gear portion 22 _{of, (Dp 1 + Dp 2)} / 2 = (Dr 1 + D
The condition r ₂ ) / 2 + L _t is set, that is, the pitch circles of the drive gear unit 12 and the counter gear unit 22 are set to overlap each other. However, in order for the pitch circles of the drive gear unit 12 and the counter gear unit 22 to overlap each other when the recording medium 100 is inserted, the drive gear unit 12 and the counter gear unit 22 must be dislocation gears.

[Embodiment 2] The recording medium conveying apparatus according to Embodiment 2 has basically the same configuration as that of Embodiment 1, and the pitch circles of the drive gear unit 12 and the counter gear unit 22 are shown in FIG. As shown in the drawing, when the recording medium 100 is not inserted, the pitch circles are overlapped with each other, while as shown in FIG. 5, at least the respective tip circles are engaged with each other when the recording medium 100 is inserted. Is.

In FIG. 5, the apparatus is a recording medium 100.
At the time of insertion, the pitch circles of the drive gear portion 12 and the counter gear portion 22 are separated from each other, and only the addendum circles are overlapped with each other, so that the addendum portions are engaged. Therefore, backlash will occur between both gears, but in practical use,
That is, it was found that there is no problem in power transmission when the recording medium is conveyed. As described above, according to the second embodiment, the intended purpose can be achieved without using the dislocation gears as the drive gear portion 12 and the counter gear portion 22 as in the first embodiment.

[0027]

In the recording medium conveying device according to the present invention, the drive roller and the counter roller each have a drive gear portion and a counter gear portion that rotate with each rotation and mesh with each other. Since both rollers rotate and exert a comparatively large carrying force, even when carrying a magnetic disk or the like, which has a low mechanical strength and cannot be strongly pressed by the opposing roller, or a relatively heavy magneto-optical disk. It can be transported reliably. Moreover, since the structure is relatively simple, the device is excellent in terms of reliability, maintainability, and economy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a recording medium transport device according to a first embodiment of the present invention.

FIG. 2 is a top view showing a main part of the apparatus shown in FIG. 1, showing a case where a recording medium is not inserted.

FIG. 3 is a top view showing a main part of the apparatus shown in FIG. 1, showing a case where a recording medium is inserted.

FIG. 4 is a top view showing a main part of the apparatus according to the second embodiment, showing a case where a recording medium is not inserted.

FIG. 5 is a top view showing a main part of the apparatus according to the second embodiment, showing a case where a recording medium is inserted.

FIG. 6 is a top view showing a main part of a recording medium conveying device according to a conventional example.

[Explanation of symbols]

 10 Drive Roller 11 Drive Roller Part 12 Drive Gear Part 20 Opposing Roller 21 Opposing Roller Part 22 Opposing Gear Part 31 Oscillating Plate 32 Shaft 40 Pressing Spring 51 Motor 70 Conveying Path 100 Recording Medium L Peripheral Gap

Claims (1)

[Claims] 1. A drive roller connected to a drive source, the drive roller having a peripheral surface having a high friction coefficient, and a facing roller having a peripheral surface having a high friction coefficient, which is arranged so as to be capable of swinging so as to face the drive roller. A recording which has a pressing spring for pressing the counter roller in a direction to reduce the peripheral surface gap between the peripheral surface of the drive roller and the peripheral surface of the counter roller, and is inserted into the peripheral surface gap. A recording medium conveying device for conveying a medium, wherein the driving roller and the facing roller each have a gear portion that rotates with each rotation and meshes with each other.