JPS62104776A - Recording apparatus - Google Patents

Abstract

PURPOSE:To make it possible to mount a recording medium between a platen and bail rollers without allowing the bail rollers to be spaced apart from the platen, by providing a recording medium guide having a height sufficient to extend up to the vicinity of a press contact means and supported in a freely slidable manner in the longitudinal direction of the platen. CONSTITUTION:Another press plate 10 is further supported in a freely slidable manner through a guide pawl 9a with respect to the press plate 9 mounted to the front end part of a carriage 7. The press plates 9, 10 have almost the same curvature as a platen 1 and guide a recording medium to the platen 1. The recording medium is inserted from the rear side of the platen 1 and guided by the press plate 9 to rise between the platen 1 and the press plate 9 and further advances under the press plate 10 to be smoothly sent to the area under a bail roller 3 and closely contacted with the platen 1 by a guide plate 11 and the bail roller 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing apparatus, and particularly to a printing apparatus having a cylindrical platen for conveying a printing medium and a printing means for performing printing scanning in parallel with the platen.

[Prior Art] In various recording devices such as impact printers and inkjet printers, a recording medium such as paper is wound around a cylindrical platen made of a material such as rubber, and recording is performed on this and the platen is 2. Description of the Related Art Devices that convey a recording medium by rotating it are known.

This type of device uses various types of recording heads that perform recording scanning parallel to the platen, and in order to ensure that the recording medium in the recording area of the recording head comes into contact with the platen, a pinch roller or a pail roller is used to press the recording medium against the platen. It is common practice to press the platen against the platen.

[Problems to be Solved by the Invention] By the way, the pail roller is used to press the recording medium against the platen over the entire width of the platen, that is, the recording scanning range, and to kite the recording medium to prevent it from floating in the recording area. Normally, several bail rollers are rotatably attached to a shaft with a length equivalent to the platen width.
Further, the position thereof can be changed in various ways depending on the width of the recording medium.

Since the pail roller makes pressure contact with the recording medium downstream of the recording head, conventionally, when loading a recording medium onto the platen, it was necessary to remove the pail roller from the platen and pass it between the two. . In the old days, this work was done manually on a typewriter, but in recent years, in conjunction with an auto feeder or an autorope ink device that performs automatic cueing, the pail roller is moved to the platen using the driving force of a solenoid or motor. A configuration that separates the However, if a driving means such as a solenoid or a motor is used, there are problems in that not only the cost of the device increases, but also the weight of the device increases and the external size of the device increases.

[Means for Solving the Problems] In order to solve the above problems, the present invention includes a cylindrical platen that conveys a recording medium, and a cylindrical platen that moves parallel to this platen to perform recording scanning on the +iii recording medium. The recording apparatus has a means for pressing the recording medium against the platen within a region extending in the longitudinal direction of the platen, and a length corresponding to the region and a height extending to the vicinity of the pressing means, and the recording device has a means for performing the recording scan. A configuration is adopted in which the recording medium guide means is slidably supported in the longitudinal direction of the platen.

[Function] According to the above configuration, the recording medium is smoothly and reliably loaded between the pressure contact means and the platen by the kite means extending to the vicinity of the pressure contact means, and furthermore, due to its sliding structure, the guide means can move the recording medium of the recording scanning means. Does not interfere with operation.

[Examples] The present invention will be described in detail below based on examples shown in the drawings.

FIG. 1 is a shoulder view showing the configuration of the main parts of the recording apparatus, and in FIG. 1, reference numeral 1 denotes a platen made of a material such as rubber and having a cylindrical shape. The platen 1 is fixed to a platen shaft 2 made of a material such as metal. Two wooden guide sleeves 5, 6 or side plates of the device (not shown) run parallel to this platen 1.
It passes through the carriage 7 on which the do 8 is mounted, for recording by a predetermined method such as the impact method.
As a result, the carriage 7 is supported so as to be able to swing freely parallel to the platen. The carriage 7 is connected to a drive means such as a motor (not shown) via a wire or the like, and is driven by this drive to move along the platen and perform recording on a recording medium wound around the platen.

The recording medium is inserted from behind the platen between the platen 1 and a guide plate 11 having a curvature substantially similar to that of the platen 1 at its leading end, and is led to the front surface of the recording disk 8 through the space between them. The recording medium is pressed into contact with the platen 1 by the pail roller 3 in the recording area of the recording head 8 so as to be in close contact with the platen 1. The pail roller 3 has a shaft 4 similar to the conventional device.
The shaft 4 is rotatably supported by the pail roller 3, and the shaft 4 receives a biasing force via a spring or the like (not shown) in order to obtain a predetermined pressing force of the pail roller 3.

At the front end of the carriage 7, a presser plate 9 similar to that in a known recording device is attached. The press plate 9 is made of a transparent material such as an acrylic plate so that the recording area can be visually recognized, and has an opening 9b in the center so as not to interfere with recording by the recording pad 8.

Furthermore, in this embodiment, another presser plate 10 is slidably supported on the presser plate 9 via a guide claw 9a. The holding plate 1o has a length corresponding to the width of the area 6 of the pail roller 3 described in 11h, and has an opening 9c in the center.The opening 9c is a rectangular square hole. Then, by this opening 1 part 9c, the presser plate 10
The sliding range in the left and right direction is determined.

Furthermore, as shown in the cross-sectional view of FIG. 2, the presser plate 9.10 has approximately the same curvature as that of the platen l, and is free from distortion over a range from the vicinity of the outlet of the kite plate 11 to the vicinity of the pressing area of the pail roller 3. The illustrated recording medium is kited against the platen 1.

Note that the reference numeral 12 in FIG. 2 is a pinch roller for pressing the recording medium against the platen 1.

Next, the operation in one or more configurations is shown in FIGS. 3(a) and 3(b).
) for a detailed explanation. When loading a recording medium onto the platen automatically using an autofeeder or autoloading mechanism or manually, first move the carriage 7 to the right or left end of the scanning area, and place the presser plate 10 on a side plate (not shown) or the like. Then, as shown in FIG. 3(b), the carriage 7, ie, the center of the presser plate 9, is moved to the end of the opening 9c of the presser plate IO.

Next, the carriage 7 is moved in the opposite direction to the end of the scanning area, the opposite side of the presser plate 1O is brought into contact with the opposite side plate, and the carriage 7 continues scanning by a predetermined amount from that position, thereby removing the presser plate 9. After aligning the centers of 10, Fig. 3 (a
), move the carriage 7 to the center of the scanning area.

After that, the recording medium is moved from the back of the platen to the platen l.
and the guide plate 11, and by rotating the platen 1 in the direction of the arrows in FIGS. 1 and 2 by a driving means such as a motor (not shown), the recording medium is moved between the guide plate 11 and the pinch roller 12. It passes between the platens 1 and is conveyed from below the platen 1 to the recording head side.

As is clear from FIG. 2, the leading end of the recording medium hits the presser plate 9 and is guided by the platen L and the presser plate 9.
rise between The position of the presser plate 10 at this time is shown in Figure 1 (
3(a)), the recording medium roughly advances under the paper presser 10. Press plate 9 as described above. l
Since the height of O reaches near the entrance of the pail roller 3, the leading edge of the recording medium is smoothly fed under the pail roller 3 from the exit of the presser plate 10 (9) as shown in FIGS. 1 and 2. . From there, the platen l continues to rotate by a predetermined amount, and the recording medium is transferred to the pinch roller 12 and the guide plate 11.
．． The hail roller 3 securely loads the platen 1 in close contact with the platen 1.

During the recording operation, when the recording head moves to the end of the scanning area, the presser plate 10 comes into contact with the side plate as shown in FIG. 3(b) and stops, and the recording head advances within the opening 9C. This allows recording of the edge region.

As described above, according to this embodiment, the recording medium can be loaded between the platen and the pail roller without separating the pail roller from the platen l, so there is no need for the troublesome work of manually separating the pail roller. Also, since there is no need for a drive mechanism to separate the pail rollers,
This has the advantage that the cost of the device can be greatly reduced and the device can be made smaller and lighter.

In the following, prior to the loading operation, the positioning of the presser plate 10 was performed by scanning the carriage, but it is also possible to support the presser plate 10 with respect to the presser plate 9 (or the carriage 7) via a biasing means such as a spring. If the center of the presser plate 10 is positioned at the center of the carriage, the recording medium can be loaded simply by moving the carriage to the center of the recording area, which has the advantage that the distance between processing surfaces can be shortened. .

The above configuration can be implemented in a recording device that uses various recording media such as paper and plastic sheets.
In that case, it goes without saying that a recording head of any recording method suitable for the recording medium can be used.

[Effects] As is clear from the above description, one aspect of the present invention includes a cylindrical platen for conveying a recording medium, and a means for moving parallel to the platen to perform recording scanning on the recording medium. The recording apparatus has a means for pressing the recording medium against the platen within a region extending in the longitudinal direction of the platen, a length corresponding to the region and a height extending to the vicinity of the pressing means, and the recording apparatus has a means for pressing the recording medium against the platen in a region extending in the longitudinal direction of the platen, and a length corresponding to the region and a height extending to the vicinity of the pressing means, Since the structure includes a recording medium guide means that is slidably supported in the longitudinal direction of the platen, there is no need for troublesome work or a separate drive means. A recording medium can be reliably loaded onto a platen only by rotation and recording scanning, and an excellent recording device that is simple, inexpensive, compact, and lightweight can be provided.

[Brief explanation of drawings]

FIG. 1 is a side view of a recording apparatus employing the present invention, FIG. 2 is a sectional view illustrating the arrangement of each member of the apparatus of FIG. 1, and FIG.
1A and 2B are explanatory diagrams showing the operation of the apparatus shown in FIG. 1, respectively. ■...Platen 2...Platen shaft 3a~3
c...Pail rollers 4a, 4b...Joint

Claims (1)

[Scope of Claims] 1) In a recording apparatus having a cylindrical platen for conveying a recording medium, and a means for moving parallel to the platen to perform recording scanning on the recording medium, means for pressing the recording medium against the platen within an extending area; and a record having a length corresponding to the area and a height extending to the vicinity of the pressing means, and supported by the recording scanning means so as to be slidable in the longitudinal direction of the platen. A recording device characterized by being provided with medium guide means. 2) Claim 1 is characterized in that a means is provided for biasing the recording medium guide means so that the central portion of the platen in the longitudinal direction substantially coincides with the central portion of the recording scanning means.
Recording device as described in section.