JPS6164475A - Paper holding mechanism of printer - Google Patents

Abstract

PURPOSE:To dispense with the fixing and attachment of a paper holding member and to prevent the levitation of paper at the time of printing, by attaching the paper holding member to a carrier so as to freely reciprocate in the direction of a platen and moving the same to the direction of the platen at the time of printing but separating the same from the platen at the other time. CONSTITUTION:When paper is inserted and fed, a solenoid 4 receives no supply of a current and holds a released state. At this time, a paper holding member 1 is retracted by a spring 5 until impinges to a stopper 13 and, because the gap between the paper holding member 1 and a platen 7 becomes large, paper feed is easily enabled. At the time of printing, the solenoid 4 receives the supply of a current to attract a spring 6. By this mechanism, the paper holding member 1 is pressed to printing paper 8 which is, in turn, closely contacted with the platen 7 to prevent the levitation of the paper at the time of printing. At this time, the paper holding member 1 is not directly contacted with the printing paper 8 by a strip member 9.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention enables a paper holding member to be moved in the direction of the platen, particularly in a serial printer, and guides the paper according to the paper condition and prevents the paper from floating. This invention relates to a paper holding mechanism of a printing device.

[Conventional technology]

In the conventional character 8 device, as shown in FIG.
This prevents contact between the ink ribbon and the ink ribbon, or guides the paper when feeding the paper.

Note that the carrier 3 slides using the rails 17 and 18 as guides. Further, 16 is a paper guide.

[Problems to be solved]

In the paper holding mechanism of a conventional printing device, the paper holding member l does not press the paper 8 directly against the platen 7;
When attaching the paper holding member 1, the delicate spacing between the holding member 1 and the paper 8 or the platen 7 is adjusted and set in advance.

Therefore, there was a problem in that adjustment required time.

Further, in the conventional method, it was not possible to prevent the sheet 8 from floating, and the sheet 8 could not be brought into close contact with the platen 7.

Therefore, there was a problem that the distance between the ink ribbon and the paper 8 could not be utilized to the fullest, and it was not necessarily an effective method for preventing J@paper stains.

Another problem is that the conventional paper holding member IFi has almost no effect on preventing vibration of the paper 8.

Solution to Problem c] The present invention solves the above problems, and in the paper holding mechanism of a printing device mounted on a carrier that reciprocates along the platen, A paper holding member that is freely attached and guides the paper and applies a pressing force to the paper, and the paper guiding member 9 are connected to each other, and the paper holding member is biased toward the platen during printing. The drive unit generates a pressing force and retracts the layered paper holding member in a direction opposite to the platen direction during paper insertion, paper feeding, or non-printing, and enables the paper to be guided. It is something.

That is, in the present invention, the paper holding member is attached to the carrier so as to be able to reciprocate in the direction of the platen, and is moved by the drive unit toward the platen to press the paper during printing, and is moved away from the platen at other times. This makes it possible to guide the paper, thereby reducing assembly man-hours by eliminating the need for accurate fixation of the paper holding member, and reliably prevents paper from floating during printing to prevent paper from becoming dirty. sell.

〔Example〕

Next, the embodiment will be described with reference to IE1 to IE4.

1 and 1E2 are respectively a side view and a front view of the printing device to which the present invention (one embodiment of the paper holding mechanism of such printing device is applied), and FIGS. 3 and 84 are respectively the above-mentioned printing These are gR diagrams showing various operating states of the main parts of the device. In each figure, the same parts as in FIG. 5 are given the same reference numerals.

In FIG. tl/C1 and FIG. 2, a paper holding member 1iFi is fixed to an arm 2, and the arm 2 is pivotally supported by a carrier 3 by its both side convex portions 2a. Therefore, #Ii&holding member 11 is
As the arm 2 swings, it can move in the platen direction (approximately reciprocating) in FIG. Furthermore, the band-like member 9 is interposed between the paper holding member 11 and the printing paper 8 to prevent the paper holding member 11 from directly contacting the printing portion of the printing paper 8, and is attached to the frame. Tension is applied by a spring 14 which is stretched between the paper sheet and the sheet guide member 15. In FIG. 1, 10 is a paper guide member.

In this configuration, when inserting paper and feeding paper, the solenoid 4 is not energized and is in a released state, as shown in FIG. 3. At this time, paper holding member 1'
1 is retracted by the spring 5 until it comes into contact with the υ stopper 13, and the gap between the paper holding member 11 and the platen 7 becomes large, making it possible to easily feed the paper.

Next, when printing, solenoid 4# is energized to attract spring 6 as shown in FIG. This K-side paper holding member 11Fi is pressed against the printing paper 8, and the printing paper 8 is brought into close contact with the platen 7, thereby preventing floating during printing. At this time, the paper holding member 11 does not come into contact with the strip member 9 [directly or with the printing paper 8].

In addition, the t-IP printer 3 can be driven while maintaining a constant gap equal to the thickness of the strip member 9 between the paper holding member 11 and the paper 8, and the print head 12 can be reciprocated along the planar plane 7. It is possible to perform good printing.

By repeating the above-described operations, it is possible to construct a paper holding mechanism that suppresses vibrations of paper without stains.

According to this embodiment, the solenoid 4 is used as the drive source, but other drive sources or mechanisms may also be used.

〔Effect of the invention〕

As explained above, in the present invention, the paper holding member is attached to the carrier so as to be able to reciprocate in the direction of the platen, and is moved by the drive unit and moved towards the platen during printing to press the paper, and is moved away from the platen at other times. Since it is possible to guide the paper by moving it in the direction, it eliminates the need for accurate fixation of the paper holding member, reducing assembly man-hours, and also reliably prevents the paper from floating during printing. It has the effect of preventing stains.

[Brief explanation of the drawing]

1 and 2 are a side view and a front view, respectively, of a printing device to which an embodiment of the paper holding mechanism of the printing device according to the present invention is applied, and FIGS. 3 and 4 are respectively a front view as seen from the platen side. FIG. 5 is a side view of the printing apparatus to which an embodiment of the paper holding mechanism of the conventional printing apparatus is applied. 1.11...Paper holding member 2...Arm 3...
・Carrier 4... Solenoid 5.6.14
... Spring 7 ... Platen 8 ... Printing paper 9 ... Strip member 10 ... Paper guide member 12 ... Head Fig. 1 Fig. 3 Fig. 4

Claims (2)

[Claims] (1) In a paper holding mechanism of a printing device mounted on a carrier that reciprocates along the platen, the paper holding mechanism is attached to the carrier so that it can freely move back and forth in the direction of the platen, and guides the paper and applies a pressing force to the paper. and a member disposed in connection with the paper holding member, which urges the paper holding member to move toward the platen during printing to generate the pressing force, and when inserting paper, feeding paper, or not printing. 1. A paper holding mechanism comprising: a drive unit that retracts the paper holding member in a direction opposite to the platen direction and enables the paper to be guided. (2) An intervening member is provided between at least one end of the paper holding member and the paper, and the intervening member prevents the paper holding member from directly contacting the paper. The paper holding mechanism of the printing device described in Section 1.