JPS59190150A - Roll sheet feeding device - Google Patents

Abstract

PURPOSE:To have smooth feed of roll paper by furnishing a side, which is pressed to the paper in transportation by a resilient member, between the roll paper and the transport member. CONSTITUTION:A guide 23 is installed between a roll paper 1 loaded in a paper feed device and a pair of transport means 3, 4. This guide 23 is pressed to the paper in transportation by a resilient member 25, with the surface in contact with the paper. A soft elastical boss 24 is set on this contact surface as being planted. Accordingly slackness of the paper is eliminated by the guide to ensure proper attitude of the paper in transportation, and further degradation of the paper can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper feeding device, and more particularly, to an improvement in a paper feeding device for sequentially feeding roll paper as copy paper for a copying machine.

Prior art In order to feed roll paper, a roll paper metal is disposed on the opening force of a rotatable shaft, and the tip of the roll paper is pulled by a conveying means, so that the roll paper is fed while the shaft rotates. A one-and-one paper feeding device is used so that the paper sheets are unraveled and fed in sequence. That is, as shown in FIG. 1, the roll paper 1t is passed through the shaft 5 and supported by all 7 runs 2 on both sides of the roll paper, and these are received through the bearings 6'1il fitted to both ends of the shaft 50. is placed in the groove 7 of the material 8, and the nut 10 prevents the bearing 6 from coming off. At the same time, the receiver is pivotally connected to the member 8 through one pivot point 14t, and one end of the receiver is connected to the other end of a spring 12 fixed to the member 8, so that it can be attached toward the axis of the roll paper. The plate member 11 which is now being pushed presses the pair ring 6 to prevent the roll paper 1 from falling or floating from the support member 8. Thus, the leading end of the roll paper 1 is passed between a feed roll 3 and a pinch roll 4, which serve as transport means, to feed the paper. That is, the pinch roll 4 presses the paper against the feed roll 3 with a constant pressure, and when the feed roll 3 rotates, the paper sandwiched between these rolls is pulled, thereby making paper, and as the shaft 5 rotates, the roll paper 1 is They are fed sequentially.

Now, when such a paper feeding device is used to feed a predetermined amount of paper and the conveying means (rolls 3 and 4 in the case shown in the figure) is stopped, the roll paper continues to rotate even after the stop due to inertial force. Loose paper forms between the roll paper and the transport means. As a result, when the next paper feeding is restarted, the rolled paper is fed in a meandering manner to the left and right or is biased in one direction, which can lead to cutting errors and paper jams. Therefore, in the conventional device, as shown in FIG. 1, a brake device 9 biased by a spring member 12 presses the roll paper 1, and due to frictional resistance, back tension (in the opposite direction to the feeding direction) is applied to the pattern paper. tension in the direction) was applied to prevent the paper from loosening.

However, the weight of the roll paper changes depending on the size of the paper and the remaining amount used, and the weight of the roll paper changes depending on the size of the paper and the remaining amount
Frictional resistance changes depending on the type of paper such as paper, and spring pressure also changes depending on changes in roll paper diameter, etc.
For these reasons, in reality, it is not possible to completely control the relaxation of the paper, causing more or less the above-mentioned troubles and significantly reducing the stability of the machine.

Furthermore, when using a brake device like the one shown in Figure 1, the roll paper and the brake unit rub against each other with strong force, which compresses the paper surface and causes paper dust and denaturation of the fiber surface (paper surface). When roll paper is used as copying paper, the transfer efficiency may decrease in some areas, leading to problems such as copying errors (cutting out copies, etc.).

Purpose of the Invention The purpose of the present invention is to provide a roll paper feeding device that solves the above-mentioned problems, feeds paper correctly in a predetermined direction, and does not cause deterioration of the paper. It is something to do.

Composition of the Invention The present invention provides a mechanism in which the end portion of a roll paper disposed around a rotatable shaft is pulled by a conveying means so that the roll paper is sequentially fed while the shaft rotates. In the paper feeding device, the elastic member is arranged between the roll paper and the conveying means, and is urged toward the paper by an elastic member so that the surface thereof comes into contact with the paper, and the contact surface is flexible. This book achieves the above objective by providing a guide in which elastic projections are implanted.

In the roll paper feeding device of the present invention having such a configuration, the guide functions to feed paper by eliminating slack in the paper and controlling its posture, and also prevents deterioration of the paper unlike conventional devices. There are almost no such things. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and effects of the present invention, the present invention will be described below with reference to embodiments shown in the drawings.

Embodiment FIGS. 2 and 3 show an embodiment of the roll paper feeder of the present invention.

In the figure, the manner in which the roll paper 1 is arranged on the shaft 5, the function of the plate member 11, the mode of paper feeding by the roller 3.4, etc. are basically the same as those described above in connection with FIG. It is. Therefore, in FIGS. 2 and 3, members having the same configuration and function as those in FIG. 1 are given the same numbers as in FIG. 1, and their explanations are omitted.

However, in the roll paper feeding device of the present invention,
In the playing device 90 as shown in FIG. 1, an f-id 23 is arranged between the roll paper 1 and the transport means, ie the roll 3.4.

As shown in FIGS. 2 and 3, this f-id 23 is
It is pivotally connected to the main body of the machine via a pivot point 26, and is biased (pressurized) toward the fed paper from the back side by an elastic member, that is, a leaf spring 25, so that its surface comes into contact with the fed paper. It is arranged so that A large number of protrusions 24 made of a flexible elastic body are implanted on the contact surface.

In this way, when the feed roll 3 is driven by an external signal, the shaft 5 rotates with the plate member 11 holding down the bearing 6, and the roll paper 1 is unraveled in the 10th order, and the rolls 3 and 4 are unraveled. It is sent while passing between the At this time, the guide 23 functions to tension the paper to feed the paper smoothly.

When the roll 3 (conveying means) stops, the shaft 5 rotates in the negative direction due to inertia force, and the roll paper 1 is sent out to create a loose paper, but the guide that is biased towards the fed paper Eliminates or reduces such laxity by 2311%. When paper feeding is resumed, depending on the state of relaxation of the paper, the patterned paper will meander from side to side or try to be fed to one side. A guide 23 with an object prevents such movement of the paper and feeds it straight in a predetermined direction.

Effects of the Invention As can be understood from the above explanation, the roll paper feeding device of the present invention can feed roll paper regardless of paper size, paper quality, or amount of remaining roll paper (large or small diameter of roll paper). Since the guide disposed between the and the conveying means is pressed toward the paper feed, paper feeding is performed smoothly, the loosening of the paper when paper feeding is stopped is reduced, and furthermore, the paper feeding is The resumption of paper work will also be carried out smoothly. In addition, the guide of the device of the present invention does not compress the roll paper itself with strong force, so
The properties of the paper do not change, and therefore, when the paper feeding device of the present invention is used in a copying machine, the above-mentioned coby defect does not occur.

[Brief explanation of the drawing]

FIG. 1 is a partially exploded perspective view showing a typical example of a conventional roll paper feeding device. FIG. 2 is a partially exploded perspective view showing one embodiment of the roll paper feeding device of the present invention, and FIG. 3 shows an elastic member having a different shape from that shown in FIG. 2 as an elastic member that biases the guide. It is a perspective view which shows another Example of this invention used. 1... Roll paper, 3-... Feed roll, 4...
Pinch roll, 5... Rotating shaft, 23... Guide, 2
4...Elastic flocking part

Claims (1)

[Claims] In a paper feeding device, the end of the roll paper disposed around the periphery of a rotatable shaft is pulled by a conveying means, so that the roll paper is sequentially fed while the shaft rotates. , which is disposed between the roll paper and the conveyance means, is biased toward the second-feed paper by an elastic member, and has a surface that contacts the core-feed paper, and has a flexible outer elastic protrusion on the contact surface. A paper feeding device characterized by having a guide on which an object is planted.