JPH04191218A - Paper sheet feeding device - Google Patents

Abstract

PURPOSE:To improve positioning precision by providing guide support rod free to reciprocally move in the right and left directions on a width regulating guide, and forming an engagement hole to engage the head end of the support rod at the time when the support rod is positioned at a position corresponding to the size of record paper on a deck side part in a paper sheet feeding device with the width regulating guide of a copying machine and others. CONSTITUTION:A width regulating guide 6 is constituted of a pair of right and left cylindrical vertical members 12, 13 and a cylindrical grip 14 with its both ends closed, and it is formed free to slide against a bottom plate 1. Thereafter, a width regulating guide support rod 17 projected in the right direction is supported free to advance and retreat on the grip 14, and it is devised to advance and retreat to the right and the left against an energizing force of a spring 24 by the pressing-down operation of a press button 23. Subsequently, a plural number of engagement holes 8 are formed at the same height as that of the support rod 17 and at positions corresponding to the size of the record paper in the longitudinal direction on a right side plate 5 of a paper sheet feeding deck 50, and the width regulating guide 6 is devised so that its head edge is engaged when the width regulating guide 6 is positioned in accordance with the record paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device for an image forming apparatus such as a copying machine, and more particularly to a paper feeding device having a pull-out paper feeding deck.

[Prior Art] Conventionally, as shown in FIG. 4, a paper feeding device 200 is known which is attached to a copying machine main body 100 and has a plurality of pullout type paper feeding decks 201.

Inside each paper feed deck 201, a large number of recording papers are stacked and placed on an elevating tray 202. Each paper feed deck has
A width adjustment kite 203 that slides in the front and back direction is provided for positioning the recording paper.

To store recording paper in the paper feed deck 201-, first pull out the paper feed deck 20 and then adjust the position of the width adjustment guide 203 according to the size of the recording paper. Next, the fifth
As shown in the figure, recording paper is placed on the elevating tray 202. Then, push in the paper feed deck 20 to return it to its original position.

However, when the paper feed deck 201 is returned to its original position,
Due to the impact and the weight of the recording paper, as shown in Figure 6,
The width alignment guide 203 may be bent and the recording paper may not be accurately positioned at the paper feeding position.

Therefore, conventionally, a reinforcing member corresponding to the size of the recording paper is fitted between the width adjustment guide 203 and the rear plate 204 located behind it.

[Problems to be Solved by the Invention] In the conventional method of fitting a reinforcing member according to the size of the recording paper between the width adjustment guide 203 and the rear plate 204 located behind it, the reinforcement member is inserted every time the size of the recording paper is changed. There is a problem in that the parts must be replaced, which is troublesome. In addition, it is necessary to prepare reinforcing members in a plurality of sizes depending on the size of the recording paper, and there is a problem in that it is not easy to store the reinforcing members.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feeding device that can stably support a width alignment guide at a predetermined position with a simple operation and accurately position recording paper at a paper feeding position.

[Means for Solving the Problems] A paper feeding device according to the present invention is provided in a paper feeding deck so as to be movable back and forth, and has a width alignment guide for positioning recording paper. A width-adjusting kite support rod extending in the left-right direction is attached so that it can move back and forth in the left-right direction, and is attached to the side of the paper feed deck.
An engagement member having a plurality of engagement holes through which the tip of the width alignment guide support rod enters and exits when the width alignment guide is positioned at a position corresponding to the size of a predetermined recording paper is provided. It is characterized by

[Operation of the Invention] The tip of the support rod is moved out of the engagement hole of the engagement member, and the width adjustment guide is moved together with the support rod to a position corresponding to the recording size. Thereafter, the tip of the support rod is inserted into the engagement hole of the engagement member.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

In the following description, the front means the lower side of FIG. 3, the rear means the upper side of the figure, the left means the left side of the figure, and the right means the right side of the figure.

FIG. 1 shows a paper feed deck of a paper feed device.

1 to 3, the paper feed deck 50 includes a bottom plate 1, a front plate 2 fixed to the front end of the bottom plate 1, a rear plate 3 fixed to the rear end of the bottom plate 1, and a bottom plate 1. A left side plate 4 fixed to the left side of the bottom plate 1, a right side plate 5 fixed to the right side of the bottom plate 1, a recording paper front end guide plate (path shown) fixed to the rear surface of the front plate 2, It is provided with a recording paper width adjustment guide 6 that is freely guided, and an elevating tray 7 that is supported by a recording paper front end guide plate and a rear plate 3 so as to be movable up and down.

The elevating tray 7 is raised and lowered by an electric motor (not shown).

The width adjustment guide 6 includes a base (path shown) supported by the bottom plate l via a rail member (not shown) so as to be movable back and forth, and a pair of left and right cylindrical vertical members 12 and 13 whose lower ends are fixed to the base.
and a cylindrical grip 14 closed at both ends supported on the upper ends of both vertical members 12,13. A step portion 14a is formed on the left side of the grip 14.

The elevating tray 7 is formed with guide holes 15, 16 that are long in the front and rear direction, through which the vertical members 12, 13 respectively pass.

The grip 14 supports a width adjustment guide support rod 17 that protrudes rightward from inside the grip 14 so as to be movable forward and backward. In the grip 14, one end of a pair of front and rear levers 18 is pivotally attached to the left end of the support rod 17 by a pin 19.

This lever 18 is swingably supported by the grip 14 by a support shaft 20. The other end of each lever 18 has a stepped portion 1
It is connected to a push button 23 disposed above the stepped portion 14a via a link 22 passing through a hole 21 long in the left and right direction formed in the horizontal wall of the step portion 14a.

A compression spring 24 is provided in the grip 14 between the inner surface of the vertical wall of the stepped portion 14a and the left end of the support rod 17, and this spring 24 always moves the support rod 17 in the rightward direction. It is energized.

A plurality of engagement holes 8 are formed in the right side plate 5 of the paper feed deck 50 at the same height as the support rod 17 and spaced apart from each other in the front-rear direction in accordance with the size of the recording paper. The tip of the support rod 17 has entered a predetermined engagement hole 8 .

In the above configuration, in order to position the width adjustment guide 6 according to the size of the recording paper, first, by pressing the push button 23, the support rod 17 is moved to the left against the biasing force of the spring 24. Then, remove the tip of the support rod 17 from the engagement hole 8.

Next, while holding down the push button 23, the grip 14 is held and the width adjustment guide 6 is moved to a predetermined position according to the size of the recording paper. After this, let go of the push button 23. Then, due to the biasing force of the spring 24, the support rod 17 advances to the right, and its tip enters and engages the engagement hole 8 corresponding to the size of the recording paper. Therefore, the width adjustment guide 6 is firmly supported in that position.

[Effects of the Invention] According to the present invention, the width adjustment guide can be stably supported at a predetermined position with a simple operation, so that the recording paper can be accurately positioned at the paper feeding position.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a perspective view of the paper feed deck, Figure 2 being an enlarged partially cutaway front view showing the clip and support rod, and Figure 3 being an enlarged front view showing the clip and support rod. ■ in Figure 2
4 to 6 are diagrams for explaining the conventional example, and FIG. 4 is a perspective view showing the paper feeding device.
FIG. 5 is a side view showing the state in which recording paper is stored in the paper feed deck, and FIG. 6 is a schematic view showing the state in which the paper feed deck is pushed into the main body of the paper feed apparatus. 6... Recording paper width alignment guide, 5... Right side plate, 8...
...Engagement hole, 14...Grip, 17...Support rod, 18...Lever, 22...Link, 24...Spring, 50...Paper feed deck. that's all

Claims (1)

[Claims] (1) In a paper feed device that is provided on the paper feed deck so as to be movable back and forth and has a width alignment guide for positioning the recording paper, a width alignment guide support rod that extends in the left and right direction reciprocates in the left and right direction on the width alignment guide. It is movably attached to the side of the paper feed deck, and the tip of the width alignment guide support rod enters and exits when the width alignment guide is positioned at a position corresponding to the specified recording paper size. A paper feeding device characterized in that an engaging member having a plurality of engaging holes is provided.