JPH0617175B2 - Cut sheet feeding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of a cut sheet feeding device, and more particularly to an opening / closing mechanism for setting a cut sheet in the device.

[Prior art]

The cut sheet feeding device is a device that loads sheets cut into a predetermined size in a stacked state and automatically feeds the sheets one by one to a recording unit (printing unit) or the like. Widely used in recording equipment.

As this cut sheet feeding device, a paper feed roller is installed in a space formed by an openable and closable front cover and a fixed cover (or a case), and the paper feed roller is provided between the paper feed roller and the fixed cover. A cut sheet holding middle plate that is spring-biased is provided, and a side presser that is spring-biased laterally is provided on the side of the fixed cover to regulate the side of the cut sheet. There has been proposed a type in which cut sheets are automatically fed while being separated by driving.

When replenishing and loading (setting) a cut sheet into this type of cut sheet feeding device, the front cover is opened, the middle plate is pushed down to move away from the sheet feeding roller, and is moved to the side pressing sideways, and the cut is performed between them. A sheet (a bundle of cut sheets) is inserted, the tip of the sheet is positioned below the separation claw, and then the operation of releasing the middle plate and the side retainer and closing the front cover is performed.

However, in the conventional cut sheet feeding device, since the operation of the middle plate and the side presser and the opening / closing operation of the front cover are performed by different mechanisms, it is possible to operate these before and after loading the cut sheet. There is a problem that two operations are required and therefore the operation is complicated.

〔Purpose〕

An object of the present invention is to solve such a problem of the prior art, and to provide a cut sheet feeding device that can be easily and reliably opened and closed by one operation by interlocking the middle plate, the side presser, and the front cover. It is to be.

〔Overview〕

The present invention relates to a cut sheet supply device provided in a recording device for supplying a cut sheet to the recording device, in which a middle plate for supporting the cut sheet in a fixed cover, and a cut sheet supported by the middle plate. Feeding means for sending out
Middle plate urging means for urging the cut sheet supported by the middle plate toward the feeding means by pressing the middle plate toward the feeding means, and a cut supported by the middle plate Side retainer to regulate the side of the seat,
And a side pressing urging means for urging the side pressing to the cut sheet, and rotating the side pressing to move the middle plate against the urging force of the middle plate urging means from the feeding means. Side plate release means for releasing the regulation of the cut sheet by the side retainer against the urging force of the side retainer urging means by rotating the middle plate release means for displacing in the direction of separating And a lever for rotating both of the middle plate releasing means and the side pressing release means.
The fixed cover is provided with a front cover that can be opened and closed to supplement the cut sheet on the middle plate, and the lever pushes up and opens the front cover according to the rotation of the lever in one direction. The above-described object is achieved by a configuration in which the release plate separates the middle plate from the feeding unit and the side press release unit releases the regulation of the cut sheet.

〔Example〕

 The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a use state of a cut sheet feeding apparatus according to an embodiment, which is detachably set in a main body 1 of a recording apparatus (printer or the like).

In the cut sheet feeding device, a front cover 4 is attached to a fixed cover 2 via a fulcrum 3 so that the front cover 4 can be opened and closed (oscillated), and a paper feed roller 5 axially supported on the fixed cover 2 side is provided in a space between these covers. is set up.

As shown in FIG. 3, two paper feed rollers 5 are installed at a predetermined interval, and are driven via a roller shaft 6 pivotally supported by the fixed cover 2.

In FIGS. 1 and 3, an intermediate plate 7 for holding cut sheets is provided between the paper feed roller 5 and the fixed cover 2. The middle plate has an ear portion 8 formed at the rear end thereof inserted through a groove hole 9 in the rear central portion of the fixed cover 2 so as to project the ear portion to the outside, and is swingably attached with the groove hole as a fulcrum. There is. However, the middle plate 7 is constantly urged toward the paper feed roller 5 by the spring 10 provided between the front portion of the middle plate 7 and the fixed cover 2.

On the other hand, a cam shaft 12 which is rotated by a lever 11 is pivotally supported at the rear portion of the fixed cover 2.

The cam shaft 12 has a cam 13 that comes into contact with the ears 8 of the middle plate 7.
Is provided, and the middle plate 7 can be pushed down by operating the lever 11 with the slot 9 as a fulcrum. That is, the lever 11 allows the intermediate plate 7 to be separated from the sheet feeding roller 5 against the spring 10 and operated in the state shown in FIG.

Further, the lever 11 is attached so as to come into contact with a protrusion or an engaging portion 14 on the rear portion of the front cover 4,
By the turning operation, the front cover 4 can be opened to the state shown in FIG. That is, when the lever 11 is operated and the intermediate plate 7 is pushed down by the cam 13, the front cover 4 can be opened at the same time.

In FIGS. 1 and 3, one side of the fixed cover 2 (the side of the lever 11) has a release arm 16 rotatable around a vertical shaft 15 and a cut urged inward and laterally by a spring 17. Side retainer 1 that regulates the side of the seat
8, a support plate 19 fixed to the fixed cover 2, and a separation claw member 21 pivotally supported by a pin 20 on the support plate so as to be vertically swingable.

A paper width regulation plate 22 is fixed to the other side of the fixed cover 2 (opposite side of the lever 11), and a separation claw member 23, which is bilaterally symmetric with the above-mentioned one, is pivotally supported to this via a pin 20.

Separation claws 24 for separating the cut sheets one by one from the uppermost layer in cooperation with the sheet feeding roller 5 are formed at the tips of the separation claw members 21 and 23. In addition, each separation claw member 21, 23
At the rear end portion, an ear portion 25 is formed which can extend inward and engage with the middle plate 7. When the middle plate 7 is pushed down as shown in FIG. 24 is rocked upward.

The numeral 26 in FIG. 1 indicates a bundle of cut sheets loaded.

An end surface cam 27 is formed on the boss portion of the lever 1 as shown in FIGS. 3 and 4, and when the lever 11 is rotated clockwise in FIG.
4 is rotated around the support shaft 15 in the direction of the arrow (clockwise) in FIG. 4, so that the side presser 18 can be separated from the side of the cut sheet against the spring 17 as shown in FIG. There is.

That is, by operating the lever 11, it is possible to simultaneously push down the intermediate plate 7 and open the front cover 4, and simultaneously withdraw the side retainer 18.

When the cut sheet 26 is supplied, when the paper feed roller 5 is driven in the direction of the arrow in the use state of FIG. 1, one of the uppermost layers of the cut sheet 26 is separated to the outside of the separation claws 24, 24 and passed through the supply port 28. The paper is fed between the paper feed roller 29 and the pin 8-ch roller 30.

The cut sheet thus supplied to the paper feeding mechanism is fed to the printing section between the platen 31 and the print head 32 by the paper feeding roller 29.

The printed (recorded) cut sheet is sent to the discharge tray 34 by the discharge roller 33.

When the cut sheet 26 is consumed and replenished, the front cover is opened as shown in FIG. 2 and the intermediate plate 7 is pushed down, and the side presser 18 is retracted as shown in FIG. At this time, the separation claw 24 also moves to the upper retracted position at the same time.

Thus, after the automatic sheet feeder is operated to the open position, the cut sheet bundle is inserted from above, and then the front cover 4 is pressed from the outside or the lever 11 is rotated to the original position to close the sheet. The position (loading state), that is, the sheet feedable state of FIG. 1 is set.

However, according to the above configuration, the middle plate 7 and the side presser 1
8 and the front cover 4 are all interlocked with the lever 1, and all of them can be operated in one operation by the lever, so that the automatic sheet feeder is set to the open position for replenishment loading of the cut sheet 26 or internal inspection. The operation to perform was able to be performed very easily and reliably.

In addition, the operation of returning from the open position to the original state can be performed extremely easily and surely by one operation of pushing down the front cover 4 or rotating the lever 11.

〔effect〕

As is clear from the above description, according to the present invention, in the cut sheet supply device provided in the recording device for supplying the cut sheet to the recording device, in the fixed cover,
An intermediate plate that supports the cut sheet, a feeding unit that feeds the cut sheet supported by the intermediate plate, and a cut sheet that is supported by the intermediate plate by pressing the intermediate plate toward the feeding unit For biasing the sheet feeding means to the sheet feeding means, a side retainer for regulating the side of the cut sheet supported by the intermediate sheet, and for biasing the side retainer to the cut sheet And a side pressing urging means for arranging and rotating the middle plate against the urging force of the middle plate urging means to displace the middle plate in a direction of separating from the feeding means. A side press release means for releasing the regulation of the cut sheet by the side press against the urging force of the side press urging means by providing the means, and the middle plate releasing means, One lever for rotating both of the side pressing release means is provided, and a front cover that can be opened and closed to supplement the cut sheet on the middle plate is provided on the fixed cover. The lever is pushed up to open the front cover in response to the rotation of the sheet, the intermediate plate releasing means separates the intermediate plate from the feeding means, and the side pressing release means releases the regulation of the cut sheet. Therefore, by interlocking the middle plate, the side presser, and the front cover, there is provided a cut sheet feeding device that can be opened and closed easily and reliably by one operation.

[Brief description of drawings]

1 is a vertical cross-sectional view of the cut sheet feeding apparatus according to the present invention in use, FIG. 2 is a vertical cross-sectional view of the cut sheet feeding apparatus of FIG. 1 with a front cover opened, and FIG. FIG. 4 is a plan view of the cut sheet feeding device with the front cover removed, and FIG. 4 is a partial plan view of the cut sheet feeding device with the side presser retracted. 2 ... Fixed cover, 4 ... Front cover, 5 ... Paper feed roller (feeding means), 7 ... Middle plate, 10 ... Spring (center plate biasing means), 11 ... Lever, 13 ... Cam (Middle plate releasing means), 16 ... Release arm (side pressing releasing means), 17 ... Spring (side pressing biasing means), 18 ...
… Side presser, 26 …… Cut sheet, 27 …… End face cam (side presser release means).

Claims (2)

[Claims] 1. A cut sheet feeding device provided in a recording device for feeding a cut sheet to the recording device, wherein an intermediate plate for supporting the cut sheet and a cut supported by the intermediate plate are provided in a fixed cover. A feeding means for feeding a sheet; a middle plate urging means for urging the cut sheet supported by the middle plate toward the feeding means by pressing the middle plate toward the feeding means; By arranging a side retainer for regulating the side of the cut sheet supported by the middle plate and a side retainer urging means for urging the side retainer to the cut sheet, and performing a rotating operation. Provided with an intermediate plate releasing means for displacing the intermediate plate in a direction of separating from the feeding means against the urging force of the intermediate plate urging means, and by pivoting the side plate urging means. of Side press release means for releasing the regulation of the cut sheet by the side press against the force is provided, and one lever for rotating both the middle plate release means and the side press release means is provided. The fixed cover is provided with a front cover that can be opened and closed to supplement a cut sheet on the middle plate, and the lever pushes up and opens the front cover in response to rotation of the lever in one direction. A cut sheet feeding device characterized in that the middle plate releasing means separates the middle plate from the feeding means and the side pressing release means releases the regulation of the cut sheet. 2. The middle plate releasing means has a first cam for separating the middle plate from the feeding means by rotating the middle plate releasing means, and the side pressing release means for rotating the middle plate releasing means. The second to release the regulation by the side presser
2. The cut sheet feeding device according to claim 1, wherein the cut sheet feeding device has a cam of claim 1, and the first and second cams are arranged on a shaft which is rotated by the lever.