JPH03243548A - Paper jamming removal method for paper feeder - Google Patents

Abstract

PURPOSE:To easily remove paper jamming by providing an engaging member which is engaged with a paper feed cassette and a carrying guide and switches the carrying guide over to a set condition and releasing attitude as the paper feed cassette is mounted and/or demounted, and thereby releasing a recording chart carrying passage as the paper feed cassette is removed. CONSTITUTION:When a paper feed cassette 1 is removed, a device is turned out to be in a releasing attitude releasing a recording chart carrying passage with a carrying guide 3 moved via an energizing member 2. And the carrying guide 3 is moved into a set condition via the engaging member 2 with the paper feed cassette 1 inserted into the device. when the recording chart carrying passage is therefore jammed with papers, the paper feed cassette 1 is removed, accompanied with which, the carrying guide 3 is easily released so that jammed papers are thereby removed. when the paper feed cassette 1 is inserted in again after jammed papers have been removed, the paper carrying cassette 3 is restored to a set condition as the cassette is inserted.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a paper jam release mechanism of a paper feeder for easily clearing paper jams in copying machines, facsimile machines, printers, etc. when recording paper jams in a conveyance path. The paper feed cassette that stores recording paper is designed to facilitate clearing paper jams with a simple structure by enabling the transport guide to be switched between the set state and the release position in conjunction with the attachment/detachment of the paper feed cassette. A swingable conveyance guide for conveying the recording paper, and an engaging member that engages with the paper feed cassette and the conveyance guide and switches the conveyance guide between a set state and a released position in conjunction with attachment and detachment of the paper feed cassette. Configure.

[Industrial application field]

The present invention relates to a paper jam release mechanism for a paper feeder for easily clearing a paper jam in a copying machine, facsimile machine, printer, etc. when recording paper jams in a conveyance path.

[Conventional technology]

2. Description of the Related Art In recent years, in various copying machines, facsimile machines, printers, and the like, ordinary recording paper of various sizes has been increasingly used by loading them into respective paper feed cassettes. Along with this,
There is a need for a mechanism that can easily clear the jam when the recording paper becomes jammed.

Conventionally, in a paper feeding device that uses a paper cassette, if a paper jam occurs in the recording paper conveyance path, you can remove the paper cassette, then pull out the jammed paper, or remove the paper cassette and press the manual lever. After opening the recording paper transport path, the jammed paper was removed.

[Problem to be solved by the invention]

However, if a paper jam occurs in the recording paper transport path,
The conveyance path could not be opened simply by removing the paper feed cassette, and some machines were equipped with a mechanism to release the recording paper conveyance path using a manual lever. However, since such a mechanism is not linked to the attachment/detachment operation of the paper feed cassette, new problems such as paper feeding mistakes may occur if the paper feed cassette is inserted while the recording paper transport path is open.

Furthermore, even if a mechanism is provided that prevents insertion of the paper feed cassette when the recording paper transport path is open, such a mechanism will increase the cost of the mechanism, and furthermore, when inserting the paper feed cassette, the mechanism Sometimes, one of the paper cassettes could be damaged by hitting the paper cassette.

This invention was made in view of the above problems, and
To enable a conveyance guide to be switched between a set state and a released position in conjunction with the attachment/detachment operation of a paper feed cassette, and to facilitate clearing of paper jams with a simple structure.

[Means to solve the problem]

In order to solve the above problems, the present invention, as shown in FIGS. 1 and 2, includes a paper feed cassette 1 that stores recording paper, a swingable conveyance guide 3 that conveys the recording paper, and a A paper jam release mechanism for a paper feeding device is provided, which comprises an engaging member 2 that engages with a paper feeding cassette 1 and a transport guide 3 and switches the transport guide 3 between a set state and a released position in conjunction with attachment/detachment of the paper feeding cassette 1. It is composed of

[Effect]

In this invention, when the paper feed cassette 1 is removed as shown in FIG. 2, the conveyance guide 3 moves via the engaging member 2 to take the release position to release the recording paper conveyance path. By inserting the paper feed cassette 1 into the apparatus as shown in FIG. 2, the conveyance guide 3 is moved to the cent state via the engagement member 2.

Therefore, when a paper jam occurs in the recording paper conveyance path, by removing the paper feed cassette 1, the conveyance guide 3 is easily released, and the jammed paper can be removed after removing the zero paper. By reinserting the paper feed cassette 1, the conveyance guide 3 is restored to its set state (normal state).

〔Example〕

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

FIG. 1 is an explanatory view of the first embodiment, showing a state in which a paper feed cassette is inserted, and FIG. 2 is an explanatory view of the first embodiment, showing a state in which the paper feed cassette is removed.

As shown in the figure, a paper feed cassette 1, which can be freely attached to and detached from a paper feed device A, is capable of storing single sheets of recording paper of a predetermined paper size, and the rotation of a paper feed roller 5 in the paper feed device A allows the paper feed cassette 1 to store recording sheets of a predetermined paper size. are transferred to the conveyance guide 3 side one by one. Also,
At the bottom of the paper feed cassette 1, there is a lever 2 on one side 2, which will be described later.
A protrusion 1a is formed with a gently sloped peripheral edge so that the protrusion 1a comes into contact with the protrusion 1a. The conveyance guide 3 is equipped with a driven roller 3a in a frame body, and the front side of the conveyance guide 3 is pivoted to serve as a movable fulcrum 8, and the rear side is mounted so as to swing downward under its own weight. The driven roller 3a of the conveyance guide 3 is for gripping the conveyed recording paper between the circumferential surfaces of the conveyance roller 6 located above within the paper feeder A. The recording paper tends to become jammed in the recording paper conveyance path 9 between the upper surface side of the conveyance guide 3 after the driven roller 3a and the upper conveyance roller 6 side. Note that the reference numeral 10 represents a jammed paper, and the reference numeral 7 represents a print conveyance roller. In addition,
The code inside is a frame.

On the other hand, a lever 2 which is an engaging member is provided below between the paper feed cassette 1 and the conveyance guide 3 via a support member 11.
For example, it is pivoted at two places on the left and right (in the direction perpendicular to the page). This lever 2 is pivoted on the horizontal part of the center shaft so that it can swing in the left-right direction in the drawing. The shape is bent upward at an angle of . When the paper feed cassette 1 is inserted as shown in FIG.
One side 2a slides against the bottom of the paper feed cassette l and contacts the protrusion 1a via the inclined surface, and the other side 2b of the lever 2 constantly contacts the bottom of the conveyance guide 3 to push up the conveyance guide 3. This makes it possible to maintain the gripping posture of the recording paper. In addition, as shown in the second part, when the paper feed cassette 1 is removed, one side 2a of the lever 2 leaves the contact state with the paper feed cassette 1, so the rear side of the conveyance guide 3 is pushed downward due to its own weight. and pushes down the other side 2b of the lever 2. In this state, that is, in a state in which the paper feed cassette l is removed, the conveyance guide 3 assumes the released position, and the recording paper conveyance path 9 is released.

Therefore, if a paper jam occurs for some reason, by removing the paper feed cassette 1, the conveyance guide 3 will take the release position under its own weight, making it easier to remove the jammed paper 10, and after removing the jammed paper 10. By simply inserting the paper feed cassette 1, the conveyance guide 3 can be automatically restored to the set state by the action of the lever 2.

In the first embodiment, although not shown in the drawings, a torsion coil spring with one end hooked to each of the lever 2 and the support member 11 is wound to apply a biasing force in the direction of constantly pushing down the other side 2b of the lever 2. It may also be configured to occur. This allows the lever 2 to swing more reliably when the paper feed cassette 1 is removed.

Next, a second embodiment of the invention will be described.

FIG. 3 is an explanatory view of the second embodiment, showing a state in which the paper feed cassette is inserted, and FIG. 4 is an explanatory view of the second embodiment, showing a state in which the paper feed cassette is removed. Note that the same parts as in the first embodiment will be described with the same reference numerals.

The second embodiment is a paper feed device A in which a paper feed force cell l-1 can be inserted into the upper and lower stages, and in this example, the release mechanism according to the present invention is provided on the lower stage.

As shown in the figure, a tension coil spring 4 is stretched between the lower side of the conveyance guide 3 and the frame F. This tension coil spring 4 always applies a biasing force to the conveyance guide 3 in the direction of the released position, and when the load on the lever 2 is removed, the biasing force pushes down the other side 2b of the lever 2 and causes the conveyance guide 3 to convey the recording paper. The lever 2 is bent at an angle such that one side 2a of the lever 2 comes into contact with the protrusion 1a of the paper feed cassette l, and the other side of the lever 2 2b is also bent at an appropriate angle to allow swinging to push up the conveyance guide 3 in a direction that resists the biasing force of the tension coil spring 4, and is brought into contact with the bottom of the conveyance guide 3.

Then, the recording paper transferred from the lower paper feed cassette by the rotation of the paper feed roller 5 is grabbed by the transport roller 6 and the driven roller 3a of the transport guide 3, passes through the recording paper transport path 9 in the upward direction, and then passes through the upper stage. The paper feed cassette 1 and the print conveyance roller 7 side are used to send the paper to the print conveyance roller 7 side.

Therefore, if a paper jam occurs, removing the paper feed cassette 1 will eliminate the load on the lever 2.
The biasing force of the tension coil spring 4 acts, and the conveyance guide 3 moves to the release position while pushing down the other side 2b of the lever 2, releasing the recording paper conveyance path 9 as shown in FIG. Make it easier to eliminate Gio 10. After removing the jammed paper 10, the paper feed cassette 1 is inserted, and the conveyance guide 3 is automatically restored to the set state.

Note that although the second embodiment uses two cassettes (upper and lower) as an example, it may be a paper feeding device that allows loading of paper cassettes in three or more stages. The release mechanism becomes effective.

Also, 1st. In the second embodiment, the protrusion 1a of the paper feed cassette 1 is formed on the bottom thereof, but it may be formed on the side of the paper feed cassette 1. In this case, the shape and mounting position of the lever 2 may be changed as appropriate, and the lever 2 may be configured to engage with the paper feed cassette 1 and the conveyance guide.

Note that in the first and second embodiments, the driven roller 3
a. Paper feed roller 5. Conveyance roller 6, print conveyance roller 7,
Each support shaft of the movable fulcrum 8 is fixed to two side frames (not shown) (provided on the back side and the front side of the paper).

〔Effect of the invention〕

As explained above, according to the present invention, the transport guide can be switched between the set state and the released position in conjunction with the attachment/detachment operation of the paper cassette, so if a paper jam occurs, the paper cassette can be removed. In conjunction with this, the conveyance guide assumes the released position. If the paper feed cassette is inserted after removing the jammed paper, the conveyance guide is restored to the set state in conjunction with this.

Therefore, by removing the paper feed cassette, the recording paper transport path can be released and paper jams can be easily cleared.Furthermore, when the paper feed cassette is inserted, the transport guide can be easily moved to the normal position. It is possible to restore the system without forgetting it, and to prevent new problems such as paper feeding errors after clearing a jam.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG.
The figure is an explanatory diagram of the first embodiment with the paper feed cassette removed, Figure 3 is an explanatory diagram of the second embodiment with the paper feed cassette inserted, and Figure 4 is an explanatory diagram of the second embodiment with the paper feed cassette removed. It is an explanatory diagram of a 2nd example showing a state. A...Paper feeder F...Frame...Paper feed cassette 1a...Protrusion 2 of paper feed cassette...Lever (engaging member) 2a...One side of lever 2b... Other side of lever 3... Conveyance guide 3a... Driven roller 4... Tension coil wing 5... Paper feed roller 6... Conveyance roller 7... Print conveyance roller 8... Movable fulcrum 9. ... Recording paper transport path 10... Jammed paper 11... Support member 1o Jammed K 9 Recording paper transport path 11th example of the first embodiment showing the state in which the paper feed cassette is inserted!
I Two Fu 噸 ``Easy Paper Feeding cassette is removed in the first embodiment Figure 2 The paper feed cassette is inserted in the state of the second embodiment Figure 3 is the paper feed cassette is removed in the second embodiment Example Figure 4

Claims (1)

[Claims] A paper feed cassette (1) that stores recording paper; a swingable conveyance guide (3) that conveys the recording paper; and the paper feed cassette (1) and the conveyance guide (3). engage,
The transport guide (3) is linked to the installation and removal of the paper cassette (1).
A paper jam release mechanism for a paper feeder, comprising an engaging member (2) for switching between a set state and a released position.