JPS61136833A - Cassette for loading sheets of paper - Google Patents

Abstract

PURPOSE:To prevent the erroneous operation due to the electric discharge of static electricity and improve reliability of equipment at the same time by grounding a metal member constituting a cassette to the earth part of the body of a copying machine, etc. CONSTITUTION:The electric conduction between the separating hooks 2-1 and 2-2 for separating sheets of paper one by one is secured by an intermediate plate 2-3. The right-side metal parts 2-4 of a cassette trough 2-13 is exposed to secure the electric conduction with the separating hooks, intermediate plate, etc. A leaf spring 2-5 grounded from the body side is arranged, and when a cassette 2 is set onto the body, the metal part 2-4 contacts with the leaf spring 2-5. Therefore, when the sheet of paper is supplied one by one the static electricity generated by the friction between paper is absorbed into the earth through the metal part 2-4 and the leaf spring 2-5 without being stored in the hook pats 2-1 and 2-2. Therefore, the erroneous operation due to the electric discharge of static electricity can be eliminated, and the reliability of equipment can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Scope of Industrial Application] The present invention relates to a paper loading cassette used in image forming apparatuses such as copying machines and printers.

[Conventional technology]

This type of conventional technology is configured as shown in Figure 2.
The separating claws 1-1, 1-7 were metal conductors, and were fixed to the tub 1-13 made of molded material by screws 1-io. In addition, since the head of the cassette 1-1O is recessed from the bottom of the tub 1-13, when the cassette L is set on the cassette stand (made of metal) of the main body of a copying machine, etc., the cassette L itself will be set floating above the main body chassis (GND).

Therefore, when frictionally charged paper is set in a cassette and a paper feeding operation is performed, the static charge moves to the separating claws 1-1, 1-7, the metal part of the claw gradually becomes high potential, and finally the screw part There was a drawback that the discharge noise caused by the discharge into the main body chassis caused malfunctions.

In addition, in Fig. 2, l-2 is the side presser spring,
l-3 is a cassette spring, 1-4 is a rear end regulating plate, 1-5 is a shaft for rotating the claw part, ■-11 is a tensioner for fixing the rotating shaft, l-6 is a middle plate for placing paper, ■ -6A is anti-slip affixed to the middle plate, 1-8 is Velcro tape for side holding, l-
9 is the cassette lid, '1-10 is the claw fixing screw, 1-1
2 is a cassette bucket (made of mold).

[Purpose of the invention]

The present invention prevents malfunctions caused by electrostatic discharge, which are the drawbacks of the prior art mentioned above, and at the same time improves the reliability of the device.

[Means for solving problems]

In order to achieve the above object, the paper loading cassette according to the present invention is characterized in that a metal member constituting the cassette is dropped into the ground of the main body of a copying machine or the like into which the cassette is loaded.

〔Example〕

The present invention will be explained below based on one embodiment shown in the drawings.

Figure 1 shows an embodiment of the present invention, in which 2-1 and 2-2 are claws for separating sheets of paper set in a cassette one by one, and conductivity is maintained by the middle plate 2-3. It looks like this. Also, a cassette tub? -13 has a metal part 2 on the right side.
-4 is exposed, and the claws 2-1, 2-2, and the middle plate 2
It is constructed to maintain continuity with parts such as -3. On the other hand, a plate spring 2-5 is arranged which is grounded from the main body side.

When the cassette 2 is set in the main body, the metal part 2-4 comes into contact with the leaf spring 2-5.

Therefore, when sheets of paper are fed one by one, static electricity generated due to friction between sheets is not stored in the claws 2-1, 2-2, and the metal parts 2-4. It is absorbed by the ground through the leaf spring 2-5.

Also, when dropping the metal part of the cassette to the ground, dropping it through a resistor can suppress sudden changes in current, creating a safer escape route for static electricity.

〔Effect of the invention〕

As explained above, connect the metal claw part of the cassette to the main body GND.
(GND) to conduct static electricity received from paper or the operator to GND (GND), which not only removes the accumulation of static electricity and prevents malfunctions due to discharge, but also improves confidence in the quality of the equipment. It is now possible to combine these things.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of a paper loading cassette according to the present invention, and FIG. 2 is an exploded perspective view of a conventional example. 2-1.2-2 is a metal claw part for paper separation, ? -3 is the cassette middle plate, ? -4 is a metal dowel, 2-5 is a leaf spring.

Claims (2)

[Claims] (1) In a paper loading cassette used in a copying machine, etc., a paper loading cassette whose constituent metal members are dropped into the ground of the main body of the copying machine, etc. into which it is loaded. (2) The paper loading cassette according to claim 1, wherein the metal member is dropped into the main body ground via a resistor.