JPS6235862A - Recorder - Google Patents

Abstract

PURPOSE:To securely bring a recording paper into close contact with a platen over the entire part of a scanning range and omit a means for releasing bail rollers when fitting the recording medium, by fixing one end of a flexible tape- form pressing means to a carriage and supporting the other end by a turnable shaft member. CONSTITUTION:When the recording medium is fed forward by continuously rotating the platen 1, 1 leading end part of the medium is exposed from upper edges of the pressing tapes 10, 12, and crawls under the bail rollers 3 provided in proximity to the upper edges of the tapes 10, 12. With the platen 1 further rotated, the medium is correctly fitted to a normal fitting position such that the upper end thereof passes under the bail rollers 3 to the upper side. The tapes 10, 12 function to smoothly fed to recording medium under the bail rollers, so that it is unnecessary to release the bail rollers 3. In addition, the recording scanning range can be covered by the tapes 10, 12 and a pressing plate 9 over the entire width thereof, irrespective of the position of the carriage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording apparatus, and particularly to a recording apparatus that performs recording by scanning a carriage mounted with a recording means in parallel to a recording medium on a platen.

[Prior Art] Conventionally, various recording devices such as impact printers, wire dot printers, and inkjet printers have been used as recording output devices for computers, word processors, and the like. Many of these devices have a simple mechanism, so they use a cylindrical platen made of an elastic material such as rubber, and a recording medium such as paper is wrapped around this platen, and the carriage is mounted parallel to the platen. The most widely used configuration is that printing is performed by scanning a mounted print head, and after forming one print line, the platen is rotated to perform line feeding.

In this type of device, in order to bring the recording medium within the scanning range of the recording head into close contact with the platen, a pressure contact means called a pail roller is used, and this pail roller presses the recording medium against the platen above the scanning range of the recording head. By doing this, the recording medium is brought into close contact with the platen in the recording area to obtain a constant recording quality. This configuration is
It is often used not only in impact type recording apparatuses that hit a recording medium on a platen, but also in non-impact type apparatuses such as inkjet printers in order to record to the lowest end of the recording medium.

[Problems to be Solved by the Invention] However, as has been known for a long time in devices such as typewriters, if this pail roller is not separated from the platen when loading the recording medium, it will be loaded from behind the platen. There is a problem in that the leading edge of the recording medium that has been removed hits the pail roller, making it impossible to load the medium normally. Additionally, in recent years, devices have been known that are equipped with a so-called autoloading mechanism that automatically loads sheet-like recording media stored in cassettes or the like onto a platen one by one. This is done using a drive means such as a motor, and the mechanism for this has been a factor that hinders cost reduction and miniaturization of the device.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a flexible tape-shaped pressing means with one end fixed to a carriage that performs recording scanning with respect to the platen. A configuration is adopted in which the other end is supported by a rotatable shaft member such that the pressing means moves while pressing the recording medium against the platen in a state parallel to the platen.

[Function] In the recording apparatus shown in FIG. 1, the carriage 7 on which the recording head 8 is mounted has a pressure plate 9 for pressing the recording medium in the vicinity of the recording area by the recording head 8 against the platen 1. It is provided.

Pressing tapes 10.12 are supported as pressing means between the pressing plate 9 and the left and right winding shafts 11.13, respectively.

The pressing tape 10, 12 moves in a stretched state between each winding shaft and the pressing plate 9 in accordance with the recording scan of the carriage 7, and presses the recording medium against the platen 1 over the entire platen 1. Guide plate 1 guides the recording medium from the rear of platen L.
4 and the platen 1, and when loading a recording medium onto the platen 1, the recording medium is pressed against the platen 1 over the entire area of the platen 1, so the pail roller 3
The recording medium is inserted between the pail roller 3 and the platen 1 from the outlet of the pressure tape 10 without separating the recording medium from the platen 1.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of a recording mechanism of a recording apparatus according to the present invention. What is indicated by the symbol l in the figure is a platen formed in a cylindrical shape from an elastic material such as rubber around a shaft 2, and this shaft 2 is rotatably supported between side plates (not shown). It is configured so that it can be rotated by a predetermined angle by a driving means. Two guide bars 6 are similarly supported between the side plates parallel to the platen, and these guide bars 6 penetrate a carriage 7 on which a recording disk 8 is mounted. The carriage 7 can move left and right along the guide bar 6 via a driving means (not shown) such as a belt and a pulley.

As shown in the cross-sectional view of FIG. 2, a guide plate 14 is arranged at the rear and lower positions of the platen 1, and guides the recording medium of the sheet plate loaded from the rear of the platen 1 downward. press against. Further, a pinch roller 15 is in pressure contact with the rear lower part of the platen 1, and is adapted to feed the recording medium while pressing it so that the recording medium does not become misaligned on the platen 1.

At a position above the scanning area of the recording head mounted on the carriage 7, two pail rollers 3 are attached to a pail roller shaft 4.
It is rotatably supported by the platen 1 and is pressed against the platen 1. The pail roller 3 does not need to be provided with a swinging mechanism that separates it from the platen 1 as in the prior art, and may be kept in pressure contact with the platen 1 at all times.

Furthermore, a press plate 9 made of a transparent material such as acrylic is provided in front of the carriage 7 so as to cover the vicinity of the recording area of the recording pad 8 on the carriage 7 . When recording scanning is performed by the carriage 7, the pressure contact plate 9 moves left and right with a slight clearance that allows the recording medium to pass between it and the platen 1, thereby preventing the recording medium from floating up from the platen 1.

Furthermore, one end of a pressure tape 10 made of a transparent film-like material and having a width approximately equal to the height of the pressure plate 9 is fixed to the left end of the pressure plate 9.

The remaining portion of the pressure tape 10 is wound around a winding shaft 11 provided near the left end of the platen 1. The winding shaft 11 is biased by biasing means such as a mainspring spring so as to rotate in the direction of the arrow in FIG. Further, an end portion of a pressure tape 12 configured in exactly the same manner is fixed to the right end portion of the pressure contact plate 9, and the other end is wound around a winding shaft 13 similarly applied with an urging force.

Furthermore, a scale 12a is provided on the upper edge of the pressure tape 12 by a method such as printing according to the number of digits recorded by the recording head 8.

In the above configuration, as in the conventional case, the carriage 7 is scanned by a drive means (not shown), and the recording pad 8 is driven at a desired position to record on the recording medium on the platen l, thereby forming a recording line. do. After forming a predetermined recording line, the platen l is rotated to feed the line. During such a recording operation, the left and right pressing tapes 10.12 are pulled by the winding shaft 11.13, and as a result, only a predetermined amount of tape is fed out in a straight line between the winding shaft and the pressure plate.
The recording medium on the platen l is pressed against the platen so that it does not lift up over the entire scanning area.

When the carriage 7 is scanned, the pressure tape 10.12 is unwound or wound up from the winding shaft 11.13 and moves in parallel over the recording medium on the platen l. At this time, the scale 12 provided on the pressure tape 12
Since the scales a move simultaneously, they can be used to relatively know how many digits a desired position on the recording medium is away from the recording head 8. Furthermore, by indicating this scale with other indicators, it can also be used to indicate the digit position of the recording head from the margin.

As described above, during the recording operation, the recording medium can be stabilized by being pressed against the platen l over the entire recording scanning area using the pressure tape 10° 12.

On the other hand, when loading a recording medium onto the platen 1, the recording medium is manually or automatically inserted between the guide plate 14 and the platen l from the rear of the platen 1. At this time, the recording medium is first guided by the guide plate 14 and pinched. Roller 15 and platen l
By rotating the platen 1 manually or automatically here, the platen 1 is further conveyed through the pinch roller 15. along platen 1 toward the recording head side.

Guide plate 14 curved with the same curvature as platen 1
When the recording medium advances along the pressure contact plate 9, the leading edge of the recording medium is formed to have the same width as the height of the pressure contact plate 9, and enters under the pressure tape IO stretched across the entire platen. .

If you continue to rotate platen 1 and advance the recording medium,
The leading edge of the pressure tape 10.12 is exposed from the upper edge of the pressure tape 10.12, and slips under the pail roller provided close to the upper edge of the pressure tape.As the platen l continues to rotate, the recording medium is transferred so that its upper end is exposed to the pail roller. It passes under 3 and exits upwards, and is correctly loaded into the proper loading position.

At this time, the pressure tape 10.12 smoothly feeds the recording medium under the bail roller 3 disposed close to the upper edge of the pressure tape 10.12. Particularly, no matter which position the carriage 7 is in, the entire width of the recording scanning range is covered by the pressing tape and the pressing plate, so there is no need to remove the carriage 7 when loading. does not require.

In the above embodiment, the unnecessary part of the pressure tape is wound up on the winding shaft, but as shown in FIG. A loop-shaped pressure tape lO is passed from the four guide shafts 13a to 13d to the rear of the carriage 7,
It may be supported so as to surround the scanning range of the carriage 7.

In FIG. 3, the endless pressure tape 1O may be placed so as to surround the rear of the platen 1 instead of passing through the rear of the carriage.

In any of the above embodiments, the recording head 8 may be an impact head such as a wire dot type or a daisy wheel type, or an impact head such as a thermal transfer type or an inkjet type.

[Effects] As is clear from the above description, according to the present invention, in a recording apparatus that performs recording by scanning a carrier on which a recording means is mounted parallel to a recording medium on a platen, one end is attached to the carriage. A fixed flexible tape-like pressing means is provided.

The other end of the pressing means is supported by a rotatable shaft member so that the pressing means can move parallel to the platen while pressing the recording medium against the platen, so that it can be reliably scanned over the entire scanning range. It is possible to provide an excellent recording device which has a simple and inexpensive configuration by bringing the recording medium into close contact with the platen and omitting a means for separating the pail roller when loading the recording medium.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a recording mechanism of a recording apparatus according to the present invention, FIG. 2 is a sectional view of the recording mechanism shown in FIG. 1, and FIG. 3 is a perspective view showing a different embodiment of the recording mechanism according to the present invention. It is a diagram. l...Platen 3...Pail roller 7.
... Carriage 8 ... Recording head 10.12
... Pressure tape 11.13 ... Winding shaft 14 ... Guide plate 15.
... Pinch roller 2t @ nsl Aida Fig. 2 tI grunting/scratching Fig. 3

Claims (1)

[Claims] 1) In a recording device that performs recording by scanning a carriage carrying a recording means in parallel to a recording medium on a platen, a flexible tape-shaped pressing means fixed at one end to the carriage is provided. 1. A recording apparatus, wherein the other end of the pressing means is supported by a rotatable shaft member such that the pressing means moves while pressing the recording medium against the platen in a state parallel to the platen. 2) The recording apparatus according to claim 1, further comprising means for biasing the pressing member so that the shaft member stretches the pressing member between the carriage and the shaft member. 3) The recording device according to claim 1 or 2, wherein the pressing means is made of a transparent material. 4) The recording device according to any one of claims 1 to 3, wherein the pressing means is provided with a scale for displaying recording digits.