JPS6248578A - Paper supplying and discharging mechanism for rotary drum recorder - Google Patents

Abstract

PURPOSE:To contrive a simplified construction of a paper supplying and discharging mechanism in a rotary drum recorder, by using a single member both as a squeezing member for bringing a recording paper into close contact with the drum and as a releasing member for releasing the paper from the drum. CONSTITUTION:A recording paper 2 is fed to the position A of an opened clamping pawl for the leading end of the paper by driving a registration roller 4 to make the leading end abut against the pawl, which is then closed to clamp the leading end. A drum 5 is rotated, and when the pawl is moved past the position of combined releasing and a squeezing member 6, the member 6 is turned to be pressed against the drum 5, thereby bringing the paper 2 into close contact with the drum 5 while squeezing it. When discharging the paper, the drum 5 is rotated in the reverse direction, a clamping pawl for the trailing end of the paper is opened, the member 6 is stopped immediately before reaching the position for making contact with the drum 5, and a clamping roller 7 is pressed against the drum 5 to prevent the paper from dropping. The member 6 is pressed against the drum 5, which is again rotated, and the member 6 comes between the drum 5 and the paper to release the paper, and the paper is fed out to paper-discharging rollers.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical field The present invention relates to a rotating machine, such as a printer, plotter, facsimile, etc., in which recording paper, etc. is wound and fixed around a rotating drum, and the recording paper, etc. is peeled from the drum and ejected. The present invention relates to a paper feed/discharge mechanism of a drum recording device.

BACKGROUND TECHNOLOGY In general, when reading a transmitted document in a facsimile machine and recording it on recording paper, or when recording on a recording paper in a printer or printer, one end of the recording paper is clamped and wrapped around a rotating drum, and scanning for reading or recording is performed. Many rotary drum recording devices are used in which the recording paper is separated from the rotary drum and then ejected.

Conventionally, a paper feeding/discharging mechanism that feeds recording paper, etc. to the above-mentioned rotating drum, fixes it with metal, and then peels off the recording paper from the rotating drum and discharges the paper, was developed by the Japanese Patent Laid-Open Publication No. 56-59250
JP-A-59-118544-2 and JP-A-54-108711 are known.

However, when winding non-recording paper around the drum, many of these systems have separate mechanisms for bringing the recording paper into close contact with the drum and for separating the recording paper from the drum. This has led to a complicated mechanism, which has been a major obstacle in reducing the size and cost of the device.

Purpose This invention was made in order to solve the problems in the conventional rotating drum recording device as described above.
It is an object of the present invention to provide a paper feed/discharge mechanism for a rotating drum recording device that can simplify the mechanism.

In order to achieve the above object, the present invention clamps the leading end of the recording paper with a presser claw, rotates the cylindrical drum while squeezing the recording paper with a squeezing member, wraps the recording paper around the cylindrical drum, and presses the recording paper around the cylindrical drum. In the paper feed/discharge mechanism of a rotary drum recording device that ejects the recording paper by inserting a member for separating the recording paper between the wrapped recording paper and the cylindrical drum, the above-mentioned squeezing process is performed when the recording paper is peeled from the cylindrical drum. The member is inserted between the cylindrical drum and the recording paper.

The present invention will be explained in more detail below based on embodiments shown in the drawings.

In FIG. 1, a recording sheet 2 set in a cassette 1 is fed by a sheet feeding roller 3 and aligned so that its leading edge abuts against a registration roller 4. Then, the recording paper 2 is fed by the drive of the registration roller 4 to the position A of the recording paper leading edge claw, which is opened by a cam mechanism (not shown) of the drum 5, which has been rotated in advance and is in a standby state. Then, close the presser claw and clamp the leading edge of the recording paper.

Then, the drum 5 is rotated, and when the presser claw passes the position of the stripping and squeezing member 6, the squeezing member 6 is rotated and pressed against the drum 5, and as the recording paper is wound as the drum 5 rotates, While squeezing the recording paper, it is brought into close contact with the drum 5. After approximately one rotation, the trailing edge of the recording paper is clamped by a not-illustrated trailing four-fold claw.

Next, when the recording paper is to be ejected, the drum 5 is rotated in the opposite direction to the direction in which the recording paper is wound, and the trailing end presser claw is opened by a cam mechanism (not shown) to a position where the squeezing member 6 comes into contact with the drum 5. Stop just before. At this time, the presser roller 7 is pressed against the drum 5 to prevent the recording paper from slipping off. This presser roller 7 is rotatable and rotates together with the drum 5 when it is pressed against the drum 5.

Then, the squeezing member 6 is pressed against the drum 5, and then the drum 5 rotates, so that the squeezing member 6 enters between the drum 5 and the recording paper wound around it, and the recording paper is pushed onto the drum 5. The sheet is peeled off from the sheet and sent to the sheet discharge roller 8. Furthermore, the claw at the tip is opened by a cam mechanism,
The leading edge of the recording paper comes off and is conveyed by the paper ejection roller 8.
Recording sheets are stacked on the stacker 9.

FIG. 2 shows the squeezing member 6 of the drum 5 and the recording paper leading edge claw. A plurality of them are arranged, and their tips come into contact with and separate from the outer peripheral surface of the drum 5 as the shaft 12 rotates.

Further, in the slits formed along the generatrix line on the circumferential surface of the drum 50, a tip claw lO and a rear presser claw 11 are provided, respectively.
A leading end lever LQa and a trailing end lever IL&, which are substantially integrally attached, are rotatably housed, so that the leading end clamping claw 10 and the trailing end clamping claw 11 are swingably received with respect to the drum 5. It's attached. and both presser claws 10
．． 1 and 11 are projectable to and from the drum surface by an opening/closing mechanism (not shown).

The front end presser claw 10' and the rear end presser claw 11 are divided into two portions corresponding to the squeezing member 6, and thereby, as shown in FIG. H
12 is brought into close contact with the drum 5, and the 6 presser claws can be closed while holding down the rear 4 parts of the recording paper, making it possible to wrap the recording paper so that it does not float off the drum 5.

Fig. 4 shows an embodiment in which the tip of the squeezing member 6 has elastic force, and the squeezing member 6'
is attached to the mounting plate 3 fixed to the shaft 12, with one end attached to -7
The tip of the squeezing member 6' is urged downward by a torsion coil spring 15 which is split between the squeezing member 6' and the mounting plate 13. It is now possible to do so.

In the embodiment shown in FIG. 4, when the squeezing member 6' is pressed against the drum 5, there is no half of each squeezing member 6', and a constant pressing force is applied over the entire area in the moving direction of the drum. Can be maintained and recorded! It is possible to make the drum 5 (dense) by pushing it evenly.

The fifth row shows an implementation row in which a notch groove is provided on the outer peripheral surface of the drum 5 facing the divided portion of the T6 immersion end presser claw 11 corresponding to the squeezing member 6. Normally, when the presser foot opens, the edge of the recording paper moves from the drum to A However, if the recording paper is in complete contact with the drum, the squeezing member cannot be inserted between the recording paper and the drum.

Therefore, in order to constantly and stably peel the recording paper from the drum 5, the outer peripheral surface of the drum, where the rear end of the recording paper 2 is located, is located at a position f facing the squeezing member 6, and a swinging mechanism that fixes the presser pawl 11. A notch groove 17 is provided in the bracket 16 so that the squeezing member 6 can easily enter between the drum 5 and the recording paper 2 even when the rear end of the recording paper is in close contact with the drum. be.

In the paper feed/discharge mechanism of the rotary drum recording device, the squeezing member 6 serves as a squeezing member for bringing the recording paper into close contact with the drum 5 when the recording paper is wound around the drum 5.
When the recording paper is discharged from the drum 5, each member functions as a recording paper peeling member.

Effects As described above, this invention eliminates the need for the squeezing member for bringing the recording paper into close contact with the drum and the peeling member for peeling the recording paper from the drum, which were conventionally provided separately. This has the excellent effect of simplifying the paper feeding and discharging mechanism of the rotary drum recording device.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a rotary drum recording device according to the present invention, FIG. 2 is a schematic perspective view showing an embodiment of a paper feed/discharge mechanism in the rotary drum recording device, and FIG. 3 is a schematic diagram of the paper feed/discharge mechanism of the rotary drum recording device. A side view, FIG. 4 is a perspective view showing another embodiment of the squeezing member according to the present invention, and FIG. 5 is a partial side sectional view showing a further embodiment of the present invention. 2... Recording paper 5... Drum 6.6'...
・Stringing member 10...Tip presser claw 11...Rear end presser claw 1 person outside - 1 person, 2 figures

Claims (1)

[Claims] 1. Clamp the leading edge of the recording paper with a presser claw, rotate the cylindrical drum while squeezing the recording paper with a squeezing member, and wrap the recording paper around the cylindrical drum. In a paper feed/discharge mechanism of a rotating drum recording device that inserts a member that peels off the recording paper and discharges the recording paper, when peeling the recording paper from the cylindrical drum, the squeezing member is inserted between the cylindrical drum and the recording paper. A paper feed/discharge mechanism for a rotating drum recording device, characterized in that the paper is inserted into the rotating drum recording device.