JPH06329271A - Paper feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a paper feeding device capable of finely adjusting the span between side fences in accordance with the size of a transfer paper on the premise of a designated position lock type. [Structure] A pair of side fences 2, which regulate both side surfaces of a transfer sheet placed on a sheet feed tray 1 in the feeding direction.
3, one side fence 2 is fixed to each position by a positioning member 6 in accordance with the size of the transfer paper, and the other side fence 3 is positioned in conjunction with the rack portion 3a and the gear 4. In the sheet feeding device, a fulcrum 5 that rotatably supports the gear 4 is provided so as to be movable in a direction orthogonal to the feeding direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device applied to a copying machine, a printer, a facsimile machine, etc., and more particularly to a sheet feeding device characterized by a side fence moving mechanism for regulating the width direction of a transfer sheet. .

[0002]

2. Description of the Related Art In a paper feed tray for stacking transfer paper, a side fence for regulating the width of the transfer paper is required, but the paper size is set so that the transfer paper of any paper size can be stacked. Correspondingly, a universal type side fence is known in which the user can move the side fence. The universal type side fence is further divided into a free stop type that can be fixed at an arbitrary position and a specified position lock type that can be fixed only at a position that matches each paper size.

[0003]

However, although the above free-stop type can be applied to transfer sheets of any size, it has a problem such as a skew when the user forgets to set the side fence or the set is incomplete. May occur.

In the designated position lock type, the user's erroneous operation is unlikely to occur, but even if the paper should be the same size, there is a difference in size depending on the manufacturer, and the conventional designated position lock type side fence cannot handle this. The gap between the transfer paper and the size of the gap with respect to the transfer paper for a certain span between the side fences is large, which causes skew and non-feeding.

The present invention has been made on the basis of such a background, and on the premise of a designated position lock type, to provide a paper feeding device capable of finely adjusting the span between side fences according to the size of the transfer paper. With the goal.

[0006]

The object is to have a pair of side fences for regulating both side surfaces of a transfer sheet placed on a paper feed tray in the feeding direction, and one side fence is a positioning member. Is fixed at each position according to the size of the transfer paper, and the other side fence is positioned so as to be interlocked with the rack portion and the gear, and a fulcrum that rotatably supports the gear is provided. This is achieved by being provided so as to be movable in a direction orthogonal to the feed direction.

Further, instead of the fulcrum of the gear, the positioning member may be provided so as to be movable in a direction orthogonal to the feed direction.

[0008]

In the former method, the fulcrum position of the gear is moved in the direction orthogonal to the feed direction, and the span between the side fences is finely adjusted to set the optimum position for each transfer paper width.

In the latter means, the positioning member is moved in the direction orthogonal to the feeding direction and the span between the side fences is finely adjusted to set the optimum position for each transfer paper width.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a sheet feeding device according to the first embodiment.

The paper feed tray 1 has a front side fence 2 on the front side of the apparatus and a rear side fence 3 on the rear side of the apparatus so as to regulate the side surface of the transfer sheet. Each side fence 2 and 3 has a rack portion 2a and 3a,
The gear 4 is meshed with the gear 4 so that they are interlocked. The gear 4 is rotatably supported by a fulcrum 5 which is movable in the directions of arrows A and B.

The front side fence 2 is adapted to be locked by the respective groove portions 6a, 6b, 6c of the positioning plate 6 provided integrally therewith. Therefore, by setting the front side fence 2 in any of the groove portions 6a, 6b, 6c, the position of the rear side fence 3 that is interlocked by the gear 4 is determined, and by this, the side that matches the set transfer paper, respectively. The span between the fences 2 and 3 can be set.

With this structure, when the span between the side fences 2 and 3 is too large for the width of the transfer paper, the position of the fulcrum 5 is moved in the direction of arrow A. As a result, with respect to the movement amount L of the fulcrum 5, the side fence 2,
The span between 3 is 2L smaller. Similarly, when the span between the side fences 2 and 3 is too small, if the position of the fulcrum 5 is moved in the direction of arrow B by L ′, the side fences 2 and 3 are moved.
The span between 3 is 2L 'larger.

As described above, by finely adjusting and fixing the fulcrum 5 in the directions of the arrows A and B, it is possible to set the optimum span between the side fences 2 and 3 for the transfer paper. Normally, when setting the front side fence 2,
The size display section 7 in the paper feed tray 1 is used as a guide, but in the case of this configuration, the positional relationship between the front side fence 2 and the size display section 7 does not change even if the span between the side fences 2 and 3 is adjusted.

FIG. 2 is a plan view of the sheet feeding device according to the second embodiment.

Each component structure is the same as that of the first embodiment, but in this embodiment, the fulcrum 5 supporting the gear 4 is fixed to the paper feed tray 1. Further, the positioning plate 6 having the groove portions 6a, 6b, 6c for locking the front side fence 2 is movable in the directions of arrows A and B and can be fixed at any position.

Here, if the span between the side fences 2 and 3 is too large relative to the width of the transfer paper and the positioning plate 6 is moved L in the direction of arrow A, the span between the side fences 2 and 3 becomes 2L smaller. . Similarly, side fence 2,
If the span between 3 is too small, move the positioning plate 6 to the arrow B
By moving L'in the direction of, the span between the side fences 2 and 3 increases by 2L '.

By finely adjusting and fixing the positioning plate 6 in the directions of the arrows A and B as described above, the optimum side-fence span can be set for the transfer paper.
In the case of this configuration, the center between the side fences 2 and 3 does not change even if the span between the side fences is adjusted.

[0020]

According to the first aspect of the present invention, the fulcrum position of the gear is moved and the span between the side fences is finely adjusted to set the optimum position for each transfer paper width. Stable paper feeding without feeding is possible. Further, since the position of one side fence position does not change even if the span between side fences is finely adjusted, there is also an effect that there is no deviation from the size display portion.

According to the second aspect of the present invention, the positioning member is moved and the span between the side fences is finely adjusted to set the optimum position for each transfer paper width, so that there is no skew or non-feeding. You can feed paper.
Further, even if the span between the side fences is finely adjusted, the center between the side fences does not change, so that there is an effect that the transfer paper and the image do not shift during the image formation.

[Brief description of drawings]

FIG. 1 is a plan view of a paper feeding device according to a first embodiment of the present invention.

FIG. 2 is a plan view of a paper feeding device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Paper Feed Tray 2 Front Side Fence 2a Rack 3 Rear Side Fence 3a Rack 4 Gear 5 Support 6 Positioning Plate

Claims (2)

[Claims] 1. A pair of side fences for regulating both side surfaces of a transfer paper placed on a paper feed tray in the feeding direction, one side fence being matched with a transfer paper size by a positioning member. In the paper feeding device which is fixed at the position of 1 and the other side fence is positioned by interlocking with the rack portion and the gear, the fulcrum for rotatably supporting the gear is orthogonal to the feeding direction. A sheet feeding device, which is provided so as to be movable in any direction. 2. A pair of side fences for restricting both side surfaces of a transfer paper placed on a paper feed tray in the feeding direction are provided, and one side fence is respectively adjusted by a positioning member according to the size of the transfer paper. In the paper feeding device configured to be fixed at the position, and the other side fence to be positioned by interlocking with the rack portion and the gear, the positioning member has a position in a direction orthogonal to the feeding direction. A sheet feeding device, which is movably provided.