JPH0344765Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a paper ejection device provided at the paper ejection side end of the main body of an electrostatic recording machine such as an electronic copying machine or an electrostatic printer. In particular, when a paper jam occurs, the jammed paper can be easily removed.

(b) Prior Art Electronic copying machines capable of removing jammed paper are disclosed in, for example, Japanese Patent Application Laid-Open No. 60-80882 and Japanese Patent Application Laid-Open No. 1983-1989.
This is shown in Publication No. 70466.

The former type is a so-called clamshell type, in which the pair of paper ejection rollers is separated from the chassis, and the one described in the latter is configured so that only one of the pair of paper ejection rollers is separated. It is configured so that it can be rotated.

(c) Problems to be solved by the invention In the so-called clam shell type, the chassis is divided into two in the vertical direction, and when both chassis are closed, it is necessary to accurately match the rollers and gears. Chassis, rollers, etc. had to be manufactured and assembled with high precision, leading to high prices.

Further, in the case where only one of the pair of paper ejection rollers is rotated, the pair of rollers are simply rotated without being separated from each other, so it is not possible to easily remove jammed paper.

(d) Means for solving the problem The present invention is based on a method in which a paper ejection cover, on which a pair of paper ejection rollers is attached so as to be able to approach and separate from each other, is swung around one end of the cover on the electrostatic recording machine body. In a movably pivotally mounted sheet discharge device of an electrostatic recording machine, a first elastic member that presses at least one roller of the pair of sheet discharge rollers against the other roller, and one end portion of the first elastic member are provided. a lever that is fixedly installed and swingably attached to the paper ejection cover; and a second elastic member that biases the free end of the lever in a direction that releases the pressing force of the first elastic member. When the paper ejection cover is in a closed state with respect to the machine body, the free end of the lever comes into contact with the machine body, presses the paper ejection roller pair with the pressing force of the first elastic member, and presses the paper ejection roller pair. , the paper ejection device is characterized in that when the paper ejection cover is open from the machine body, the lever is biased by the second elastic member to release the pressure from the first elastic member. .

(e) Action When the paper ejection cover is released from the electrostatic recording machine body,
Since the pressing force of the first elastic member that presses the pair of paper ejection rollers against each other is released, the paper stuck between the pair of paper ejection rollers can be easily removed.

Furthermore, when the paper ejection cover is closed on the machine body after removing the jammed paper, the pair of paper ejection rollers are automatically pressed into contact with each other by the first elastic member.

(f) Embodiment FIGS. 1 and 2 are configuration diagrams showing different aspects of the first embodiment of the present invention. In FIG. 1, the cover is closed to the main body of the device, and in FIG. is shown in a state where it is released from the main body of the device.

In these figures, 1 and 2 are a pair of heat rollers that are rotatably installed in the main body of the apparatus (not shown), with the upper roller 1 having a heater inserted therein, and the lower roller 2 not being shown. The paper 3 on which unfixed toner has adhered is pushed between the pair of heat rollers 1 and 2 by the upper roller 1.
is fixed under heat and pressure by moving in the direction of the arrow.

Reference numeral 4 denotes a cover provided at the paper discharge side end of the apparatus main body, and is swingably mounted (openable and closable) on a support shaft 5 installed in the chassis of the apparatus main body.

Reference numeral 6 denotes a part of a chassis provided above and to the left of the pair of heat rollers 1 and 2.

A long hole 7 extending vertically in the upper part and a circular hole 8 in the lower part are formed in the center of the cover 4, respectively. Rotating shafts 11 and 12 are loosely fitted in a rotatable manner, respectively. Although not shown, the rotating shaft 12 of the lower pair of paper ejection rollers 10 is connected to rotational driving means.

A lever 13 as a spring control member is swingably mounted on the upper right side of the pair of paper ejection rollers 9 and 10 of the cover 4, and this lever 13 is moved clockwise by a torsion spring 14, that is, its free movement. The end portion is biased in the direction of contacting the chassis 6.

The lever 13 has a base end portion of a leaf spring 15 bent in an “inverted F” shape fixed to the lever 13.
Near the free end of 5 is the upper paper ejection roller pair 9.
The upper part of the rotating shaft 11 is in sliding contact with the upper part of the rotating shaft 11 so as to urge the rotating shaft 11 downward, that is, to press the upper paper ejecting roller 9 to the lower paper ejecting roller 10.

When the cover 4 is closed to the main body of the apparatus (FIG. 1), the free end of the lever 13 comes into contact with the chassis 6 and moves counterclockwise against the torsion spring 14. bias towards Then, the vicinity of the free end of the leaf spring 15 presses the rotating shaft 11 of the upper paper discharge roller 9 downward, and the paper discharge roller pair 9 and 10 are pressed against each other. Therefore, the paper 3 is conveyed while being held between the pair of paper discharge rollers 9 and 10, and is discharged from the main body of the apparatus.

On the other hand, when the cover 4 rotates counterclockwise about the support shaft 5 and is released from the main body of the apparatus (FIG. 2). The lever 13 is biased clockwise by the elastic force of the torsion spring 14. Then, the vicinity of the free end of the leaf spring 15 is separated from the rotating shaft 11 of the upper paper discharge roller 9.

When the upper paper ejection roller 9 is lifted upward in this state, the paper ejection roller 9 moves upward along the elongated hole 7 formed in the cover 4, and the paper ejection roller pair 9 and 10 are separated from each other. do. Therefore, it is possible to easily remove the paper 3 that is jammed between the pair of paper ejection rollers 9 and 10.

3 and 4 are block diagrams showing a second embodiment of the present invention, with FIG. 3 corresponding to FIG. 1 and FIG. 4 corresponding to FIG. 2. In this second embodiment, the same parts as in the first embodiment are designated by the same reference numerals, and their explanation will be omitted.

The second embodiment differs from the first embodiment only in the shape of the leaf spring 16 that presses the upper paper ejection roller 9 downward. In this second embodiment, the vicinity of the free end of the leaf spring 16 is wound around the rotating shaft 11 of the upper paper ejection roller 9 so as to allow rotation.

Therefore, when the cover 4 is opened from the main body of the apparatus (FIG. 4). Since the vicinity of the free end of the leaf spring 16 lifts the rotating shaft 11 of the upper paper discharge roller 9 upward, the paper discharge roller pair 9 and 10 are automatically separated.

(G) Effects of the invention In this invention, when the paper ejection cover is released from the electrostatic recording machine main body, the pressing force of the spring (first elastic member) that presses the paper ejection roller pair against each other is released.
Even if it is not the so-called clamshell type, jammed paper can be easily removed.

Therefore, the structure of the electrostatic recorder main body can be simplified and the cost can be reduced.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a block diagram with the cover closed, and FIG. 2 is a block diagram with the cover open. 3 and 4 show a second embodiment of the present invention, with FIG. 3 being a block diagram corresponding to FIG. 1, and FIG. 4 being a block diagram corresponding to FIG. 2. 3...Paper, 4...Cover, 5...Spindle, 6...
... Chassis, 9, 10 ... Paper ejection roller pair, 11,
12... Rotating shaft, 13... Lever, 15, 16...
...Leaf spring.

Claims (1)

[Scope of Claim for Utility Model Registration] An electrostatic recording machine in which a paper ejection cover, on which a pair of paper ejection rollers are attached so as to be able to approach and separate from each other, is pivotably pivoted about one end of the cover to the main body of the electrostatic recording machine. A paper ejecting device for an electric recording machine includes: a first elastic member that presses at least one roller of the pair of paper ejecting rollers against the other roller; one end of the first elastic member is fixedly provided; The paper ejection cover includes a lever that is swingably attached to the cover, and a second elastic member that biases a free end of the lever in a direction to release the pressing force from the first elastic member. When the lever is in the closed state with respect to the machine body, the free end of the lever comes into contact with the machine body, and the pressing force of the first elastic member presses the paper ejecting roller pair, and the paper ejecting cover also closes against the machine body. A paper ejecting device characterized in that when the lever is released from the main body, the lever is biased by the second elastic member to release the pressure applied by the first elastic member.