JPH0217452B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a paper storage device in which corner snubbers are automatically retracted in conjunction with a bottom plate when paper is replenished.

2. Description of the Related Art Conventionally, a paper tray that accommodates sheets in a stacked state is provided with a corner snubber to prevent double feeding of sheets. The above-mentioned corner snubber is installed at the corner of the paper tray on the paper output side, and prevents double feeding by separating the topmost paper and the paper below by utilizing the buckling of the paper during paper feeding. However, the corner snubber is pressed against the paper by its own weight or spring force, and when the paper runs out, it comes into contact with the bottom plate on which the paper is loaded, so it is difficult to load the paper into the paper tray. When replenishing paper or replacing paper in the paper tray, it is necessary to disengage the bottom plate from the corner snubbers, and the corner snubbers may get in the way and damage some of the paper or cause the corner snubbers to disengage. There was a problem where the snubber itself was deformed.

To improve the above problem, the corner snubber is stopped by a stopper so that it does not descend even if the bottom plate on which paper is loaded is lowered, or the corner snubber is moved to the bottom plate by a link mechanism when the bottom plate is lowered. There are also ones that are designed to move away from the wall and retreat upwards, such as in Publication of Utility Model Publication No. 54-30778 and Publication of Utility Model Publication No. 55-
It is publicly known from Publication No. 101540 and the like.

However, in each of the above-mentioned publications, the corner snubber moves in a direction perpendicular to the stacked paper within its plane, that is, upward, so that a gap is created between the paper and the corner snubber. Because the paper is configured as
The replenishment operation is troublesome, there is a risk of paper being damaged by the corner snubbers during replenishment, and the bottom plate and corner snubbers are linked by a large link mechanism, which requires extra space to accommodate the link mechanism. There were also problems such as the equipment itself becoming large and expensive due to the space required.

Purpose of the Invention The present invention has been made with the aim of improving the above-mentioned problems, and it is an object of the present invention to provide a paper storage device in which paper can be replenished and replaced without being obstructed by corner snubbers.

Structure of the Invention A paper storage device according to the present invention includes a paper tray 1 that has a vertically movable bottom plate 1a and stores paper 2 in a stacked state on the bottom plate 1a, and a paper tray 1 for storing paper 2 in a stacked state on the bottom plate 1a. A paper storage device comprising a corner snubber 3 located on the paper side and whose lower end is rotatably supported, and biasing means 5 for biasing the upper end side of the corner snubber 3 toward the paper 2 side. The corner snubber 3 is supported by a support shaft 4 at a position where the lower end is below the bottom plate 1a and a predetermined distance d ₁ from the tip of the bottom plate 1a, and extends the bottom plate 1a by a certain amount or more. A main part 3a that is pressed by the tip of the bottom plate 1a when the bottom plate 1a is lowered; and a stack of paper 2 that is connected to the main part 3a.
A rising portion 3b is provided upright along the leading end side, and the bottom plate 1a is connected to the rising portion 3b and is bent at a substantially right angle so as to be positioned on the upper surface of the stacked sheets 2. When the main part 3a is pressed by the main part 3a, it moves through the rising part 3b and is arranged so as to form a gap _d2 between it and the leading end of the paper 2 when stored in a stacked state. The claw portion 3c is characterized by comprising:

Embodiment The present invention will be described in detail below with reference to an illustrated embodiment. In the figure, reference numeral 1 denotes a paper tray set in a copying machine (not shown), and a bottom plate at the bottom is urged upward by a biasing means (not shown). 1a, and paper 2 is placed on this bottom plate 1a.
The bottom plate 1a is stored in a loaded state, and when the bottom plate 1a is lowered by means not shown when replenishing paper, it is locked in the lowered position. Further, the sheets of paper 2 accommodated in the paper tray 1 are conveyed one by one from the top in the direction of the arrow by a feed roll (not shown) and supplied to the copying machine. A corner snubber 3 is provided.

As is clear from FIG. 1, the corner snubber 3 includes a main portion 3a having a substantially V-shaped cross section, and a sheet of paper stacked on the bottom plate 1a, which is connected to the main portion 3a and located at both ends. 2 and a rising portion 3b provided along the tip side of the rising portion 3b.
b A claw portion 3c connected to the upper end and bent at a substantially right angle so as to be positioned on the upper surface of the stacked sheets 2
It consists of As is clear from FIG. 2, the lower end of the main portion 3a of the corner snubber 3 is attached to a support shaft 4 at a position below the bottom plate 1a and a predetermined distance d ₁ from the tip of the bottom plate 1a. The bottom plate 1a is rotatably supported, and as shown in FIG. When the pret 1 is lowered
a contacts and presses the main portion 3a, rotates around the corner snubber 3 support shaft 4, and the claw portion 3
A gap d ₂ is formed between the paper 2 and the leading edge of the sheets 2 stacked and stored.

Further, between the protruding piece 3d protruding from the side of the rising portion 3b of the corner snubber 3 and the paper tray 1, there is a tension spring or the like that urges the upper end side of the corner snubber 3 toward the paper 2 side. Biasing means 5
is installed.

Therefore, when replenishing the paper tray 1 with paper 2 or replacing the paper 2 in the paper tray 1, when the bottom plate 1a of the paper tray 1 is lowered by means not shown, the bottom plate 1
As shown in FIG. In order to evacuate from above 2,
The paper 2 can be replenished or replaced without being hindered by the claw portion 3c of the corner snubber 3.

Effects of the Invention As described above, when the bottom plate 1a of the paper tray 1 is lowered when replenishing the paper 2 to the paper tray 1 or replacing the paper 2 in the paper tray 1, the tip of the bottom plate 1a But the third
As shown in the figure, the main part 3a of the corner snubber 3
Since the corner snubber 3 contacts and presses the corner snubber 3, the claw portion 3c located at the upper end of the corner snubber 3 is retracted from above the paper 2 against the biasing means 5. This eliminates the risk of the paper 2 being damaged by the claw portion 3c of the corner snubber 3 or the corner snubber 3 itself being deformed, and also facilitates the replenishment and replacement of the paper 2. Be able to do it. Furthermore, after replenishing the paper 2, by raising the bottom plate 1a, the corner snubber 3 automatically returns to its original position by the action of the biasing means 5, so there is no need to manually return it each time. , there are no problems such as forgetting to put it back.

In addition, the claw portion 3c of the corner snubber 3 is retracted to the side of the paper 2, and the upper part of the paper 2 is completely opened. Replenishment is easy, there is no risk of paper being damaged by the corner snubber 3 during replenishment, and the bottom plate 1
Since there is no need for a link mechanism for interlocking the corner snubber 3 with the corner snubber 3, the device itself can be made smaller and lower in price.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, with FIG. 1 being a perspective view, FIG. 2 being a side view, and FIG. 3 being an explanatory view of the operation. 1 is a paper tray, 1a is a bottom plate, 2 is paper, 3 is a corner snubber, 4 is a support shaft, and 5 is a biasing means.

Claims (1)

[Scope of Claims] 1. A paper tray 1 having a vertically movable bottom plate 1a and storing paper 2 in a stacked state on the bottom plate 1a; , and a corner snubber 3 whose lower end is rotatably supported, and a biasing means 5 that biases the upper end side of the corner snubber 3 toward the paper 2 side, the corner snubber 3 The lower end is supported by a support shaft 4 at a position below the bottom plate 1a and a predetermined distance d ₁ from the tip of the bottom plate 1a, and when the bottom plate 1a is lowered by a certain amount or more. , a main part 3a that is pressed by the tip of the bottom plate 1a, and a stack of sheets 2 connected to the main part 3a.
A rising portion 3b is provided upright along the leading end side, and the bottom plate 1a is connected to the rising portion 3b and is bent at a substantially right angle so as to be positioned on the upper surface of the stacked sheets 2. When the main part 3a is pressed by the main part 3a, it moves through the rising part 3b and is arranged so as to form a gap _d2 between it and the leading end of the paper 2 when stored in a stacked state. A paper storage device comprising: a claw portion 3c;