JPS5821472B2 - FAX SHIMIRITO NO TANYO SHIMAKITSUKESOUCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single sheet winding device for winding a single sheet of paper such as recording paper or manuscript paper around a drum in a facsimile machine or the like.

Conventionally, this type of winding device uses a presser bar that holds the starting edge of the paper sheet at a fixed position on the drum, and a removable bar that can adjust its position relative to the drum to hold the end end, which varies in position depending on the size of the paper sheet. It is configured to be held down by a presser bar, or by a presser bar that is pivoted on a movable metal fitting rotatably attached to the drum shaft and held at any position on the drum by a spring action. However, the operation of the presser at the end of the paper sheet is complicated, and in the former method, when winding the paper sheet, the end presser bar, which is attached to and removed from the drum, tends to fall into the mechanism or be lost. There is the inconvenience of having to attach a presser bar to match the end position each time the size of the paper changes, and in the latter method, the end presser bar is pivotally supported on a movable metal fitting, and the end presser bar is connected to the drum shaft via this. Since it is configured to rotate around the drum, there is a drawback that if some external force is applied to the end presser bar while the drum is rotating, the end presser bar will twist and displace, causing the presser of the single sheet to come off.

The present invention solves the drawbacks of the conventional winding device, and makes it possible to simply and reliably press the paper by linking the presser bars at both ends of the paper with the opening and closing of the lid plate of the machine. The monofilament winding provided by the device is as follows.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing an embodiment in which the present invention is applied to a facsimile.

In Figures 1 to 4, reference numeral 1 denotes a drum body around which a single sheet S such as recording paper or manuscript paper is wound, and a one-way rotation clutch 4 is connected to a drum shaft 3 pivotally supported by side plates 2 on both sides of the machine body. Rotationally driven through.

Reference numeral 5 indicates pins 6 (first
A pair of guide arms are fixed to the drum shaft 3 by means of a guide groove 5a (a second
(Fig.), both ends of a single sheet end valve bar 7 parallel to the drum circumferential surface are slidably fitted, and a presser bar 7
is movable in one diameter direction of the drum 1.

Reference numeral 8 denotes a tension coil spring stretched between each end of the presser bar 7 and the bottom of the corresponding guide groove 5a, which is always biased in the direction of pressing the presser bar 7 against the drum circumferential surface. There is.

A pair of left and right positioning levers 9 which are pivoted on the side plate 2 are provided on the upper part of the fuselage as positioning lever means for locking the guard arm 5 at a certain angular position. is constantly biased clockwise in FIG. 2 by a compression coil spring 11 acting on the

Each positioning lever 9 has a recess 9a on its front lower surface that engages with the protruding end portion 5b of the guide arm 5, and between both positioning levers 9, an ironing roller 12 that rotates in contact with the drum 1 is attached to both ends of each lever. It is pivoted and suspended at the front of the.

At the inclined rear end portion 9b of each positioning lever 9, an upper cover plate 13, which is pivotally supported to the fuselage so as to be openable and closable, is attached (see Fig. 2).
Then, the cam protrusion 13a provided on the lower edge engages, and the positioning lever 9 is swung counterclockwise against the compression coil spring 11, causing the roller 12 to separate from the drum 1.

At the same time, the recess 9a of the positioning lever 9 is disengaged from the tip protrusion 5b of the guide arm 5, thereby releasing the guide arm 5.

On both sides of the machine body, there is also a lever means for bringing the paper end valve bar 7 into contact with and away from the drum circumferential surface.

A pair of left and right cam levers 14 whose intermediate portions are pivotally supported by the side plate 2
Each cam lever 14 has a cam portion 14a formed at its front end portion, which abuts against the lower surface of both ends of the end presser bar 7.

These cam levers 14 are tension coils with one end locked at their rear ends.

Although it is always biased clockwise in FIG. 2 by the spring 15, when the upper cover plate 13 is opened, the cam protrusion 13b provided at the rear end of the cam lever 14 flips the rear end of the cam lever 14 into the coil 15.
(FIG. 3), the cam portion 14a at the front end of the lever separates the end presser bar 7 from the circumferential surface of the push-up drum 1 against the tension coil spring 8.

Reference numeral 16 denotes a paper starting edge presser bar having a substantially U-shape, and its presser portion 16a along the circumferential surface of the drum is attached to the drum 1.
through the slit 1a formed on the end face of the both side parts 16b.
Both sides 16b are supported by pins 18 on the end face of the drum through two elongated holes 17, and are movable in the diametrical direction of the drum.

Also, a bridge portion 1 between the membranes 16b on both sides connected to the presser portion 16a is provided.
A leaf spring 19 passing through both ends of the drum 6c (Fig. 1) is in contact with the inner circumferential surface of the drum 1 at both ends to constantly bias the presser part 16a toward the center of the drum 1. Press it against the surrounding surface.

- In Fig. 2, reference numeral 20 denotes a lid plate at the front of the machine body that covers the front surface of the drum 1, which is pivotally supported by both side plates 2 via a shaft 21, and has leg pieces 20a extending rearward from the lower ends of both sides. A tension coil spring 22 is engaged to constantly bias the cover plate 20 toward the closed position shown.

Reference numeral 23 is a stopper that defines the closed position.

The leg piece 20a opposes the tip of the side leg 16b when the start end presser bar 16 is at a substantially vertical constant angle position as shown in FIG. 3, and tilts the cover plate 20 in the opening direction against the coil spring 22. Then, the side leg 16b is pushed up against the leaf spring 19 to separate the presser portion 16a from the drum circumferential surface.

Next, in order to wind the single sheet S around the drum 1 using the winding device configured as described above, first open the upper cover plate 13 upward from the closed state shown in FIG. 2, and then as shown in FIG. Then, the positioning lever 9 is released from the cam protrusion 13a of the cover plate 13 and rotates clockwise under the action of the compression coil spring 11, bringing the squeezing roller 12 into pressure contact with the circumferential surface of the drum, causing the drum 1 to rotate in the forward direction. As the positioning lever 9 moves, the protruding end portion 5b of the guide arm 5, which enters the lower side of the positioning lever 9, slides into the recess 9a on the lower surface of the lever and is locked, thereby preventing the drum shaft 3 from rotating.

On the other hand, at the same time as the upper cover plate 13 is opened, the rear part of the cam lever 14 is pushed down against the coil spring 15 by its cam protrusion 13b, so that the front end cam portion 14a pushes the paper end valve bar 7 against the coil spring 8. and separate it from the circumferential surface of the push-up drum.

Next, the drum 1 is further rotated in the forward direction, and as shown in FIG. When the cover plate 20 is opened forward against the tension coil spring 22, the side legs 16b of the presser bar 16 are pushed up by the leg pieces 20a as described above, and the presser portion 16a is separated from the drum circumferential surface.

Next, as shown in the figure, the starting end of the single sheet S is held down by a bar 16.
After inserting the holding part 16a into the gap between the drum circumferential surface,
When the front cover plate 20 is released and closed under the action of the coil spring 22, the presser bar 16 is lowered under the action of the leaf spring 19, and the presser portion 16a presses the starting end of the single sheet S against the drum circumferential surface. Fix it.

Then, when the drum 1 is rotated again in the direction of the arrow, the single sheet S
It is tightly wrapped around the circumferential surface of the drum by the ladder roller 12, and when the upper cover plate 13 is closed when the yarn end reaches the lower side of the end presser bar 7, the cam protrusion 13b
is released, the cam lever 14 rotates under the action of the tension coil spring 15, and the tip cam portion 14a descends, and following this, the end presser bar 7 moves into the guide groove a of the guide arm 5.
The end of the single sheet S is pressed and fixed against the circumferential surface of the drum.

On the other hand, when the cover plate 13 is closed, the rear part of the positioning lever 9 is pushed down by its cam protrusion 13a, and the recess 9a on the front lower surface is separated from the tip protrusion 5b of the guide arm 5, and is integrated with the guide arm 5. The drum shaft 3 of the drum shaft 3 is rotatably released.

That is, when the upper cover plate 13 is closed and the winding and pressing of the single sheet S is completed, each mechanical part returns to the state shown in FIG. 2.

FIGS. 5A and 5B schematically show the state immediately after the starting end is fixed when winding a single sheet, and the state after the end end is fixed.

Thereafter, the drum 1 is driven to rotate in the arrow direction by the drum shaft 3 via the clutch 4, and the single sheet S is printed or read by a printing device or a reading device (none of which is shown).

To remove the paper sheet S from the drum 1, first remove the upper cover plate 13.
is opened to release the positioning lever 9, and the protruding end portion 5b of the guide arm 5 is engaged with the recessed portion 9a to prevent rotation of the drum shaft 3.

At the same time, the cam lever 14 is driven counterclockwise,
Then, the front end cam portion 14a pushes up the end presser bar 7 to release the end of the sheet S, and then rotates the drum 1 to move the start end presser bar 16 to the same almost vertical corner position as the end presser bar 7. After that, the front cover plate 20 is opened to separate the presser portion 16a from the drum circumferential surface.

FIGS. 5C and 5D schematically illustrate the state immediately after the trailing end of the single sheet S is released and the state immediately before the starting end is released, respectively.

As is clear from the above explanation, the winding device of the present invention is
Holder bars for the beginning and end of the single-sheet paper are separately attached to the drum and the drum shaft, and by simply rotating the drum and drum shaft in relation to each other, different end-pressing positions can be determined depending on the size of the single-sheet paper. Since both presser bars move toward and away from the drum circumferential surface in conjunction with the opening and closing of the machine cover plate, wrapping and unwrapping paper sheets is extremely simple by opening and closing the cover plate without touching the presser bars at all. In addition, the end presser bar is guided by guide arms at both ends, so there is no risk of twisting or misalignment due to the rotation of the drum, and the paper can always be securely fixed to the drum circumference. The present invention has many practical effects in facsimiles and the like.

Note that the specific configuration of the device of the present invention is not limited to the above-mentioned embodiments, but can be modified in various ways as necessary, and the patent rights of the present invention are defined in the scope of the claims, including those modifications. All monofilament wraps to be applied to the device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and the first and second figures are a longitudinal sectional front view and a side view with the side plate removed, and Figure 3 shows a state in which the upper cover plate is opened and the starting end of a sheet of paper is inserted. FIG. 4 is a cutaway perspective view of one side, and FIGS. 5A, B, and 5C, D are schematic side views for explaining the process of winding and unwinding a single sheet, respectively. be. 1...Drum, 2...Side plate, 3...
...Drum shaft, 4...One-way rotation clutch,
5... Guide arm, 7... Single sheet end presser bar, 8... Tension coil spring, 9...
...Positioning lever, 11...Compression coil spring, 12...Stringing roller, 13...
・Top cover plate, 13a, 13b...Cam protrusion, 1
4...Cam lever, 15...Tension coil spring, 16...Single paper starting end presser bar, 16a
...Presser part, 16b...Side leg, 19.
...Plate spring, 20...Front cover plate, 22.
...Tension coil spring, 23...Stopper.

Claims (1)

[Claims] 1. A guide arm that is fixed to a drum shaft that rotationally drives the drum body via a one-way rotation clutch and guides a single sheet end presser bar in the diametrical direction of the drum, and an operation for opening the upper cover plate of the machine body. The guide arm and the single sheet end presser bar are locked at a certain angular position in conjunction with the closing operation of the upper cover plate, and the guide arm and the single sheet end presser bar are released from the corner position in conjunction with the closing operation of the upper cover plate. One means of positioning lever. Similarly, in conjunction with the opening operation of the upper cover plate, the single sheet end presser bar is separated from the drum peripheral surface at the corner position, and in conjunction with the closing operation of the upper cover plate, the single sheet end presser bar is moved away from the drum peripheral surface at the corner position. A lever means for pressing against the circumferential surface of the drum at a corner position, and a lever. It has a U-shape and is movably supported in the diametrical direction on both sides of the drum by membranes on both sides, and moves away from the drum circumferential surface in conjunction with the opening operation of the front cover plate of the fuselage, and in conjunction with the closing operation of the front cover plate. and a single sheet starting end valve bar that presses against the circumferential surface of the drum. A device is used to wrap paper such as Kushimiri.