JPH0245230Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a paper feeding device for feeding paper in an electronic copying machine, a printing machine, or the like.

Prior Art A paper feeding device includes a paper feeding tray that is removably disposed under a paper feeding roller, an elevating table that is disposed inside the paper feeding tray so as to be movable up and down,
The elevating table is equipped with an elevating means for elevating and lowering the elevating table, and a paper positioning means for determining the position of the sheets stacked and placed on the elevating table. It is known that a paper feed roller feeds paper while being in pressure contact with each other.

However, this paper feeding device has disadvantages in that it is not easy to replace the paper, and the paper taken out from the paper feeding tray is difficult to store, is easily damaged, and easily falls apart.

Purpose The purpose of the present invention is to provide a paper feed device in which paper can be easily replaced, paper taken out from a paper feed tray is easy to store, and the paper is not easily damaged and does not fall apart.

Configuration Next, the configuration of the present invention will be explained based on illustrated embodiments.

In FIG. 1, reference numeral 1 indicates a paper feed roller. The paper feed roller 1 is rotated in a predetermined direction during paper feeding, and can be moved up and down by a predetermined interval. A paper feed tray 2 is removably disposed below the paper feed roller 1. An elevating table 3 is arranged inside the paper feed tray 2 so as to be movable up and down. That is, as shown in FIG. 2, vertically long guide holes 2c and 2d are formed in the side plates 2a and 2b of the paper feed tray 2, and an elevating table 3 and a lift table 3 are formed in these guide holes 2c and 2d. Guide rods 3a and 3b are integrally inserted.

The lifting table 3 is raised and lowered by a lifting means 4 as shown in FIG. This elevating means 4 includes a motor 4a fixed outside the side plate 2b of the paper feed tray 2 and capable of forward and reverse rotation, and a motor 4a arranged perpendicular to a drive shaft 4b of the motor 4a and rotated by a bearing. A rotary shaft 4c that can be supported
, gears 4d and 4e that transmit the rotational force of the drive shaft 4b of the motor 4a to the rotating shaft 4c, and the rotating shaft 4.
Pulleys 4f and 4g fixed to both ends of c
A plurality of pulleys 4h, 4i are attached to the side plates 2a, 2b of the paper feed tray 2, and guide rods 3a, 3b of the lifting table 3 are attached to the pulleys 4f, 4h, and part of the pulleys 4h, 4i are attached to the side plates 2a, 2b of the paper feed tray 2. The fixed wire 4j and the pulley 4
g, 4i, and a wire 4k to which guide rods 3a, 3b of the lifting table 3 are fixed.

When a current is supplied to the motor 4a, the rotational force of the drive shaft 4b of the motor 4a is transferred to the wire 4 through the gears 4d, 4e, the rotating shaft 4c, and the pulleys 4f, 4g.
The lifting table 3 is raised and lowered by moving the wires 4j and 4k.

A paper feed cassette 5 is removably mounted on the elevating table 3. This paper feed cassette 5
As shown in the figure, the paper 6 is stored therein, and the top and front surfaces are open. The side plate 5a of this paper feed cassette 5 is the side plate 2a of the paper feed tray 2.
The paper feed cassette 5 is arranged so as to be in contact with the paper feed cassette 5. A paper presser piece 7 for regulating the upper limit of the paper sheets 6 to be accommodated in the paper feed cassette 5 is protruded from the rear upper part of the side plate 2a of the paper feed tray 2. Place the paper feed cassette 5 on the lifting table 3 and move the side plate 5a of the paper feed cassette 5 onto the side plate 2a of the paper feed tray 2.
A hole 5b is formed in the side plate 5a so that the side plate 5a does not come into contact with the paper presser piece 7 when the side plate 5a comes into contact with the paper holding piece 7.

Another side plate 5c of the paper feed cassette 5 has two positioning holes 5d formed therein. Place the paper feed cassette 5 on the lifting table 3 and move the side plate 5a of the paper feed cassette 5 onto the side plate 2a of the paper feed tray 2.
When the side plate 5 of the paper feed cassette 5 is in contact with
A cassette positioning means 8 is arranged to be inserted into the positioning hole 5d of a to determine the position of the paper feed cassette 5. As shown in FIG. 5, this cassette positioning means 8 includes two guide rods 8a arranged in a direction perpendicular to the feeding direction of the sheets 6, and a positioning piece movably attached to these guide rods 8a. 8b, and a stopper means 8c for stopping the positioning piece 8b at a predetermined position on the guide rod 8a.

The stopper means 8c includes a stopper lever 8d rotatably supported by the positioning piece 8b.
and a press-fitting piece 8e that is fixed to the lower end of the stopper lever 8d and can be press-fitted between the positioning piece 8b and the guide rod 8a, and the direction in which the lower end of the stopper lever 8d approaches the positioning piece 8b. It consists of a spring (not shown) that biases the waist stopper lever 8d. The stopper means 8c makes the positioning piece 8b movable by moving the upper end of the stopper lever 8d close to the positioning piece 8b with your fingers and separating the press-fit piece 8e from between the positioning piece 8b and the guide rod 8a. When the finger is separated from the stopper lever 8d and the press-fitting piece 8e is press-fitted between the positioning piece 8b and the guide rod 8a by the elastic force of the spring, the positioning piece 8b is stopped at a predetermined position of the guide rod 8a.

When the paper feed cassette 5 is placed on the lifting table 3 and the side plate 5a of the paper feed cassette 5 is in contact with the side plate 2a of the paper feed tray 2, the positioning piece 8b of the cassette positioning means 8 is placed on the paper feed cassette 5.
After inserting the paper feed cassette 5 into the positioning hole 5d of the side plate 5c, the positioning piece 8b is stopped at a predetermined position on the guide rod 8a by the stopper means 8c, thereby determining the position of the paper feed cassette 5.

The cassette positioning means 8 also has the function of positioning the paper 6 by bringing one end of the paper 6 stored in the paper cassette 5 into contact with the side plate 5a of the paper cassette 5.

The size of the paper feed cassette 5 is determined depending on the size of the sheets 6 stored therein. Friction pads 9, 9 are fixed to the front upper surface of the bottom plate 5e of the paper feed cassette 5. These friction pads 9 are for preventing double feeding of sheets 6 when the lowest sheet 6 is fed. Cushion pieces 10, 10 made of a flexible material such as chloroprene rubber are provided on the lower surface of the bottom plate 5e of the paper feed cassette 5. These cushion pieces 10 are provided to prevent noise from being generated when the paper feed cassette 5 is placed on the elevating table 3.

With paper 6 stored in the paper cassette 5, the paper cassette 5 is placed on the lifting table 3, and the side plate 5a of the paper cassette 5 is brought into contact with the side plate 2a of the paper feed tray 2, and the paper cassette 5 is placed on the elevating table 3. After the position of the paper feed tray 2 is determined by the cassette positioning means 8, the paper feed tray 2 is moved by hand to place the paper feed tray 2 under the paper feed roller 1 as shown in FIG. In this state, current is supplied to the motor 4a of the elevating means 4, the elevating table 3 is raised, and the paper 6 inside the paper feed cassette 5 is pressed against the paper feed roller 1. When the paper feed roller 1 is rotated in a predetermined direction while the paper 6 is in pressure contact with the paper feed roller 1, the paper feed roller 1 is rotated in the uppermost position due to these rotational forces and the frictional force between the paper feed roller 1 and the paper 6. The sheets of paper 6 are sequentially fed.

Effects The paper feed device of the present invention allows paper to be replaced while the paper is stored in the paper feed cassette.
To easily replace paper, to store paper taken out from a paper feed tray, to prevent damage, and to prevent the paper from falling apart.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view schematically showing the paper feeding device of the present invention, and Fig. 2 is a slope view showing the same paper feeding device.
FIG. 3 is a perspective view showing the elevating means of the above paper feeding device;
FIG. 4 is a perspective view showing the paper feed cassette of the above paper feed device, and FIG. 5 is a partially cutaway perspective view showing the cassette positioning means of the same above paper feed device. 1...Paper feed roller, 2...Paper feed tray, 3...
... Lifting table, 4... Lifting means, 5... Paper feed cassette, 6... Paper, 8... Cassette positioning means.

Claims (1)

[Scope of claim for utility model registration] A paper feed tray that is removably arranged under the paper feed roller, an elevating table that is disposed inside this paper feed tray so that it can be raised and lowered, and that is removably attached to this elevating table. a paper feed cassette which is placed and accommodates paper and has a positioning hole on its side for positioning on the elevating table; and a paper feed cassette which stands up on the elevating table and engages with the positioning hole. The paper feed cassette placed on the elevating table has a positioning piece for positioning the paper feed cassette on the elevating table, and a guide means for movably supporting the positioning piece. , a paper feeding device comprising a positioning means for positioning the paper, the paper feeding roller feeding the paper while the paper inside the paper feeding cassette is in pressure contact with the paper feeding roller. .