JPH0466458A - Paper feed device - Google Patents

Abstract

PURPOSE:To prevent deflection by the dead weight of a roller or a paper winding shaft and to stably feed paper by supporting the outer surface of a bearing by way of installing the bearing free to rotate in the central part of the paper winding shaft and providing a bearing receiver under the bearing. CONSTITUTION:The outer surface of a bearing 12 installed in the central part of a paper winding shaft 6 is supported by a bearing receiver 13. Consequently, the central part of the paper winding shaft 6 is supported by this so that deflection of the paper winding shaft 6 is prevented and stable paper feed is carried out. Additionally, the paper winding shaft 6 is never damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper conveyance device for conveying paper such as recording paper in a recording device, a printing device, or the like.

2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, a roll of recording paper 1, a recording head 2, a head pressing roller 3, a developing device 4, and a paper conveyance device 5 are provided. A recording apparatus is known in which a recording paper is pulled out from a roller-shaped recording paper 1 by a device 5, and an image is created on the recording paper by a recording head 2 and a developing device 4. The paper conveyance device 5 used here includes a roller shaft 6 that is rotationally driven, a plurality of rollers 7 fixed to the roller shaft 6 at intervals, and a rotatable presser foot that is pressed against the roller 7. It has rollers 8 and the like, and the recording paper is pinched and conveyed by the driven roller 7 and presser roller 8. Such a paper conveyance device consisting of a roller shaft and a plurality of rollers held by the roller shaft was widely used in other recording devices (for example, Japanese Patent Application Laid-Open No. 1-220
(See Publication No. 699).

Problem to be Solved by the Invention However, with this configuration, when the roller shaft becomes long, the roller shaft 6 and the roller 7 bend due to their own weight as shown in an exaggerated manner in FIG. 1
There was a problem that paper feeding became unstable.

In order to solve this problem, as shown in FIG. It is conceivable to support it on the outer peripheral surface. However, with this configuration, a problem arises in that the bearing 11 damages the roller shaft 6.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a paper conveying device that can prevent deflection of the roller shaft without damaging it and constantly convey paper stably. shall be.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a structure in which a bearing is rotatably attached to the center of the roller shaft, and a bearing receiver is provided below the bearing to support the outer surface of the bearing. It is composed of

Function As described above, the present invention supports the center part of the roller shaft by supporting the outer surface of the bearing attached to the center part of the roller shaft with a bearing receiver, thereby preventing the deflection of the roller shaft and making it stable. Paper feeding υ is possible, and the roller shaft will not be damaged.

Embodiment FIG. 1 is a perspective view schematically showing a part of a recording device using a paper conveyance device according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part thereof, and FIG. This is a perspective view showing the roller shaft used in the conveying device, nine rollers and bearings attached thereto, and the same or similar parts as in the conventional example of FIG. 5 are shown with the same reference numerals. In FIGS. 1 to 3, 1 is recording paper, 2 is a recording head, 4 is a developing device, 5 is a paper conveyance device, and 6 is rotatably held at both ends and is connected to a drive device (not shown). The roller shaft 7 is a plurality of rollers fixed at intervals to the roller shaft 6, and 8Fi is a presser roller arranged to be pressed against the roller 7.

A bearing 12 is rotatably attached to the center of the roller shaft 6, and a bearing receiver 13 for supporting the bearing 12 is provided below the bearing I2. This bearing receiver 13 includes a first support body 14 having a U-shaped cross section that is fixed in a fixed position, and a U-shaped cross section that is held swingably about a support shaft 15a with respect to the first support body 14. a second support 15;
two support shafts 16 fixed to and an adjustment screw 17 that adjusts the attachment angle of the second support 15 to the first support 14.
Two support shafts 16 support the outer peripheral surface of the bearing 12.

The paper conveyance device 5 having the above configuration also conveys paper in the same manner as in the conventional case.

That is, the roller shaft 6 is driven and rotated, and the press roller 8 presses the recording paper 1 against the rotationally driven roller rough, thereby transporting the recording paper 1. At this time, the roller shaft 6
Since the bearing 12 provided at the center of the roller shaft 16 is supported by the support shaft 16, deflection of the roller shaft 6 is prevented, and stable conveyance of the recording paper is possible at all times. Moreover, since the roller shaft 6 is rotatably held within the bearing 12, the roller shaft 6 is protected and will not be damaged. Furthermore, by tightening or loosening the adjustment screw 17, the second support body 15 swings around the support shaft 15a and moves the support shaft 16 up and down, so that the adjustment screw 17 allows the roller shaft 6 to move up and down. And the height of the roller 7 held therein can be easily adjusted.

In the above embodiment, the bearing I2 is connected to the two support shafts 1.
6, but this support structure can be changed as appropriate.
For example, the width of the second support body 15 may be narrowed, and four parts on which the bearing 12 is placed are formed on the upper end thereof, and the bearing 12 may be supported by the four parts. In the above embodiment, the present invention is applied to conveying recording paper in a recording device, but the present invention is not limited to this case, but can also be applied to conveying recording paper in other devices or other paper. It is possible.

Effects of the Invention As is clear from the above description, the present invention has a bearing rotatably attached to the center of the roller shaft, and a bearing receiver provided below the bearing to support the outer surface of the bearing. This has the effect of preventing the roller shaft from deflecting due to its own weight, allowing stable paper feeding, and preventing damage to the roller shaft.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a part of a recording device using a paper conveyance device according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part thereof, and FIG. Perspective view showing the roller shaft, the rollers attached to it, and the bearings, No. 4
The figure is a schematic side view of a conventional recording device, FIG. 5 is a schematic perspective view thereof, FIG. 6 is a front view exaggerating the deflection of the roller shaft used in the device, and FIG. 7 is a schematic diagram showing the deflection of the roller shaft. FIG. 3 is a cross-sectional view showing an example of a mechanism for preventing this. DESCRIPTION OF SYMBOLS 1... Recording paper, 2... Recording head, 3... Head pressing roller, 4... Developing device, 5... Paper conveying device, 6
...Roller shaft, 7...Roller, 8...Press roller, 12...Bearing, 13...Bearing receiver,
14... first support body, 15... second support body, 16.
...Support shaft, 17...adjustment screw. Name of agent: Patent attorney Shigetaka Awano and one other person Figure 2 / / Figure 1 Figure 1...Recording paper 2, recording head 4, developing device 5, paper transport device 6, roller shaft 7, roller 8, presser roller 12, - Bearing 13...Bearing receiver 14...First support body 15 Second support body 16-Support shaft diagram diagram

Claims (1)

[Claims] A roller shaft rotatably held at both ends, a plurality of rollers mounted at intervals on the roller shaft, and a bearing rotatably mounted in the center of the roller shaft;
A paper conveying device including a bearing receiver provided below the bearing and supporting the bearing.