JPH0225788Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electronic copying device, and particularly to a paper feed cassette for storing transfer paper.

[Prior art]

Normally, the paper feed cassette is provided with a positioning and fixing member to prevent the transfer paper from shifting during the copying operation.

FIG. 2 shows a conventional paper feed cassette in a fixed state, with a protrusion 2 on the bottom of the paper feed cassette 1.
The paper feed cassette 1 is positioned by fitting the paper feed cassette 1 into a recess 4 provided in the main body 3 of the copying apparatus.

FIG. 3 is a diagram showing another example of fixing a conventional paper feed cassette, using a cassette stopper. By operating a lever 6 provided on the main body 5 of the copying apparatus, the cassette stopper 7 moves into the recess 10 of the paper feed cassette 8 in conjunction with the pressure lever 9, thereby fixing the paper feed cassette 8.

[Problems with conventional technology]

In the paper feed cassette fixing device as shown in FIG. 2, if the protrusion 2 of the paper feed cassette 1 does not fit into the hole 4 accurately, the transfer paper will be misaligned.
The transfer paper is conveyed by the paper feed roller 11 at an incomplete position, causing a paper jam or the like. Further, when removing the paper feed cassette 1, it is difficult to disengage the protrusion 2 and the hole 4, and the paper feed cassette 1 cannot be pulled out smoothly.

Furthermore, in the positioning device shown in FIG. 3, an interlocking mechanism linked to the lever 6 is required.
The mechanism becomes complicated and a large space is required.

[Purpose of invention]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the conventional art, it is an object of the present invention to provide a paper feed cassette which has a simple mechanism and which can be easily taken in and out of a copying machine.

[Summary of the invention] In order to achieve the above object, the present invention provides a paper feed cassette having a box-shaped cassette for storing transfer paper and a bottom plate built into the cassette for placing the transfer paper and pushing it upward. , a force point portion that engages with a part of the bottom plate when the bottom plate is lowered and is disengaged when the bottom plate rises, an action point portion that projects outside the cassette when the bottom plate rises, and a force point portion that is moved forward. The cassette fixing means includes a connecting part that can be connected to the cassette, and the action point part is locked to a mounting part of the cassette when the cassette is projected outside the cassette.

[Example of idea]

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

FIG. 4 shows a state in which the paper feed cassette 12 is inserted into the copying machine 13.

In the figure, there is paper 1 in the paper feed cassette 12.
4 is housed therein, and a paper feed roller 15 is attached above the tip of the paper feed cassette 12. Paper 1
4, a bottom plate 16 is provided rotatably around a fulcrum 16a, and during copying, the bottom plate 16 is rotated upward by a crimping lever 17 to press the paper 14 at the top and the paper feed roller 15. . Further, a cassette stop lever 18 is provided between the bottom 12a of the paper feed cassette 12 and the bottom plate 16 so as to be rotatable about a fulcrum 18a.

FIG. 5 is a perspective view showing in detail the cassette stop lever 18 attached to the paper cassette 12 before the paper cassette 12 is inserted into the copying machine. Due to its own weight, the cassette stop lever 18 is moved at the end (action point) 18c of the cassette stop lever 18.
is heavier than the end portion (force point portion) 18b, and the end portion (force point portion) 18c is depressed into the hole 19 provided in the bottom portion 12a.

Therefore, as shown in FIG. 4, after the paper feed cassette 12 is inserted into the copying device 13, the end portion (power point) 18b of the cassette stop lever 18 is pushed by the bottom plate 16, and the cassette stop lever 18 is brought into a horizontal state. .

FIG. 1 is a diagram showing that the paper feed cassette 12 inserted into the copying apparatus 13 is in the copying state. When the copying apparatus 13 enters the copying state, a mechanism (not shown) rotates the pressure lever 17 upward about the fulcrum 17a, pushes up the bottom plate 16, and presses the paper feed roller 15 and the paper 14 together. At this time, the end (action point) 18c of the cassette stop lever 18 also falls into the hole 19 of the paper feed cassette 12 due to its own weight and is inserted into the recess 21 of the cassette stand 20.

By providing the positioning mechanism for the paper feed cassette 12 as described above, even if the copying device 13 vibrates slightly or if you accidentally try to pull out the paper feed cassette 12, if the copying device is in the copying state, the cassette stop will stop. It does not move due to the lever 18,
There is no possibility that the transfer paper 14 and the paper feed roller 15 will be misaligned. Therefore, the transfer paper 14 in the paper feed cassette 12 is reliably conveyed into the machine by the paper feed rollers 15, and no paper jams or the like occur.

After copying is completed, the crimp lever 17 rotates downward, and at the same time, the cassette stop lever 18 disengages the end (action point) 18c from the recess 21 and becomes horizontal, as shown in FIG. state. Therefore, when taking out the paper feed cassette 12, it can be taken out simply by pulling out the paper feed cassette 12 horizontally. Similarly, when inserting the paper feed cassette 12, it is only necessary to insert the paper feed cassette 12 horizontally, and the operation of inserting and removing the paper feed cassette 12 can be easily performed.

The embodiment of the present invention is not limited to the above, and the cassette stop lever 18 always has an end (point of action) 18c at the bottom 1 due to the urging force of a torsion spring or the like.
The same effect can be achieved by configuring it to fall into the hole 19 of 2a.

Also, this biasing force is applied to the bottom plate 1 without the transfer paper 14.
Even if the own weight of 6 is on the end (point of effort) 18b,
The cassette stop lever 18 needs only enough force to be horizontal.

[Effect of idea]

As explained in detail above, according to the present invention, it can be constructed by simply providing a cassette stop lever between the bottom of the paper feed cassette and the bottom plate and providing a recess in the cassette base, and can be implemented with a very simple mechanism. Can be done.

Furthermore, since the cassette stop lever operates in conjunction with the movement of the bottom plate, it is possible to reliably lock the paper feed cassette and accurately position the transfer paper during copying.

Furthermore, when not copying, the lock is released and the paper feed cassette can be smoothly inserted and removed.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the paper feed cassette of the present invention in the copying state, Fig. 2 is a block diagram showing the conventional paper feed cassette in the copying state, and Fig. 3 is a block diagram showing the paper feed cassette of the present invention in the copying state. Fig. 4 is a block diagram showing the paper cassette in the copying state, Fig. 4 is a block diagram showing the paper cassette of the present invention inserted into the copying machine, and Fig. 5 is a diagram of the fixing mechanism of the paper cassette of the present invention. FIG. 12... Paper feed cassette, 13... Copying device, 1
4... Transfer paper, 15... Paper feed roller, 16... Bottom plate, 16a, 18a... Fulcrum, 17... Pressure lever, 18... Cassette stop lever, 18b...
... end (point of force), 18c... end (point of action),
19...hole, 20...cassette stand, 21...recess.

Claims (1)

[Scope of utility model registration request] A paper feed cassette comprising a box-shaped cassette for storing transfer paper, and a bottom plate built into the cassette for placing the transfer paper and pushing it upward,
A force point portion that engages with a portion of the bottom plate when the bottom plate is lowered and is disengaged when the bottom plate rises, and a force point portion that projects outside the cassette when the bottom plate rises, and the force point portion and the force point portion can be interlocked. cassette fixing means comprising a connecting portion connected to the
A paper feed cassette, characterized in that the paper feed cassette is locked to a mounting portion of the cassette when the paper feed cassette is projected outside the cassette.