JPS61149385A - recording device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recording apparatus, and more particularly to a recording apparatus in which recording paper is sandwiched between a platen and a feed roller and the paper is fed by frictional force.

[Prior art] Examples of conventional recording devices of this type are shown in FIGS. 1 to 3.

Figures 1 to 3 show the paper feed mechanism, and what is indicated by the reference numeral 1 in the figures is recording paper, which is guided along the lower side of the platen 3 into a paper pan 2 whose cross section is arcuate. It is guided and guided between the platen 3 and the feed roller 4 that is pressed against it.

As shown in FIG. 1, there are four feed rollers 4 in total, two in the front and two in the rear, and one set is provided on each side.

As shown in FIG. 2, the front and rear feed rollers 4 are rotatably supported on both ends of an arc-shaped arm 7 via a shaft 5, and each feed roller 4 is inserted into an opening formed in the paper pan 2. It is pressed against the platen 3 side through the platen 3 side.

The arm 7 is rotatably supported on the tip of a rotary lever 9 via a shaft 6.

There are two sets of rotating levers 9, one on the left and one on the left.

It is rotatably supported midway through a shaft 10 by a bracket 8 fixed to the frame side of the device.

A spring 11 is stretched between the rear end of the rotary lever 9 and the bracket 8, giving the rotary lever 9 a tendency to rotate clockwise in the figure.

By the way, a release shaft 12, which is rotatably supported by a portion of the bracket 8 and has a zero-shaped cross section, is rotatably suspended between the left and right side plates 13, 13.

Further, a protruding piece 9a is provided protruding from the lower part of the rear end of the rotary lever 9, and this protruding piece 9a faces the release shaft 12.

Based on the structure described above, during normal paper feeding, the D-cut plane part of the release shaft 12 is brought into contact with the projection 9a of the rotary lever 9 as shown in FIG. In this state, the rotating lever 9 is rotated clockwise in FIG. 2 by the tension of the spring 11, the arm 7 is moved upward, and the feed roller 4.4 is pressed against the platen 3 through the recording paper 1. has been done.

In this state, if the platen 3 is rotated by a drive source (not shown), the recording paper 1 is freely fed.

On the other hand, when loading or removing recording paper, the release shaft 12 is rotated via a lever (not shown) so that its arcuate surface contacts the protrusion 9a of the rotary lever 9, as shown in FIG. , rotate lever 9 with spring 1
The rotating lever 9 is rotated counterclockwise in FIG. 2 against the tensile force of 1, and the feed roller 4 is separated from the platen 3.
The recording paper can be freely moved and the recording paper can be adjusted and attached/detached.

Note that the reference numeral 14 denotes a paper pressing roller, which is rotatably supported on a shaft 15 parallel to the platen 3.

Both ends of the shaft 15 are fixed to the upper end of a lever 16, and the lower end of the lever 16 is rotatably supported on the side plate 13 of the device.

This paper pressing roller 14 can press down the recording paper l guided along the platen 3 and prevent the recording paper from flapping during recording.

By the way, the reason why a plurality of feed rollers 4 are provided via the arm 7 is to enable the recording paper to be uniformly pressed against the platen at any location along the length of the platen 3. It's for a reason.

If the structure described above is adopted, recording paper can be fed and released freely, but the biggest drawback is that the number of parts is large and the number of assembly steps is increased, resulting in high costs.

[Purpose] The present invention has been made to eliminate the above-mentioned drawbacks of the conventional technology, and provides a recording device equipped with a paper feeding mechanism that is simple in structure, has a small number of parts, is easy to assemble, and can be manufactured at low cost. is intended to provide.

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

Figures 4 to 7 illustrate one embodiment of the present invention.
In the drawings, the same or corresponding parts as in FIGS. 1 to 3 are denoted by the same reference numerals, and the explanation thereof will be omitted.

In FIGS. 4 and below, the reference numeral 17 indicates a release plate which is bent at a plurality of locations as shown in FIG.

That is, it has four bent parts, first bent part 17a to fourth bent part 17d, in order from the front, the first, second and fourth bent parts are mountain bends, and the third bent part 17c is a valley. It was an occasion.

The ridge lines of each bent portion extend parallel to each other along the longitudinal direction of the release plate 17.

Further, the upper surface of the second bent portion 17b has an arc shape (2) with a predetermined curvature.

This release plate 17 is horizontally suspended between brackets 8, 8 located below near both ends of the platen 3, and its horizontal suspension structure is as follows.

That is, as shown in FIGS. 4 and 6, the release plate 17 is located near the upper end of the bracket 8 and between a pair of opposing triangular projections 8a, 8a punched out on the right shoulder. By sandwiching a protruding piece 18 protruding near the fourth bent portion 17d, it is supported rotatably within a predetermined angular range using this portion as a fulcrum.

A spring 11 is stretched between the rear edge side of the release plate 17 and the frame side of the device, giving the release plate 17 the ability to rotate clockwise in FIG. 4.

On the other hand, the reference numeral 19 is a feed lever having a structure as shown in FIG.

That is, the feed lever 19 is formed in an arc shape concentric with the platen 3, and one end of the feed roller 4 is rotatably supported in notches 19a formed at both front and rear ends of the feed lever 19.

From the center of the feed lever 19, the feed lever 19
The left and right arms 20.20 extend integrally in a downward L-shape in a state perpendicular to a plane including 20b is provided protrudingly.

As shown in FIG. 7, each bent portion 20a of each arm 20 has its lower end inserted into an opening 21.21 formed across the second bent portion 17b of the release plate 17. They are fitted together while being elastically deformed to bring them closer together.

Then, when each pin 20b passes the side edge of the opening 21, the bent portion 20a returns to its original state due to its own elasticity, and the pin 20b
b acts as a stopper and does not come out of the opening 21.

On the other hand, a triangular notch 19b is formed on the lower surface of the central portion of the feed lever 19. The angle of this notch 19b is approximately 90 degrees.

This notch 19b is in contact with the upper surface of the second bent portion 17b of the release plate 17 having an arcuate curved surface.

Therefore, when the release plate 17 is rotated, the second bent portion 17b can be rotated while being in contact with the cutout portion 19b of the feed lever 19 because the upper surface thereof is arcuate. Similarly, the feed lever 19
Since the feed rollers 4 are rotatable, all the feed rollers 4 are arranged along the platen 3.

By the way, the feed lever 1 having the above structure
As shown in FIG. 5, 9 is a set of two cutouts on one end of the platen 3, and a set of two on the other end of the platen 3. A total of four cutouts 9 are formed in the feed levers 19 and 19 of each set. The shafts 4a at both ends of the feed roller 4 are rotatably supported in the shaft 19a.

On the other hand, the reference numeral 22 in FIG. 6 is a release lever, which is rotatably supported on the side plate 13 via a shaft 23. Its upper end extends rearward beyond the platen 3, and its lower end is connected to a cam. The second release plate 17 is inserted through the surface 22a.
is in contact with the upper surface of the bent portion 17b.

Next, the operation of this embodiment configured as described above will be explained.

When no force is applied to the release lever 22, the tensile force of the spring 11 applies a rotational force to the release plate 17 in the clockwise direction in FIG. Then, the feed lever 19 is pushed upward via the second bent portion 17b, and the feed roller 4.4 is pressed against the platen 3, and the recording paper is held between the platen 3 and the feed roller 4.4.

On the other hand, if you want to load or remove recording paper, put your finger on the upper end of the release lever 22 and rotate it counterclockwise in FIG. In order to rotate the release plate 17 counterclockwise in FIG. 6 against the tensile force of the spring 11, the feed lever 1
9 descends due to its own weight while remaining in contact with the notch 19a and the bent portion 17b, and the gap between the platen 3 and the feed roller 4 is widened, allowing the recording paper to be freely attached and detached.

In this way, the feed lever is always pressed toward the platen through the common release plate, and all the feed rollers can come into contact with the platen, allowing reliable paper feeding and a simple paper release mechanism. You can do it with

[Effects] As is clear from the above description, according to the present invention, the feed roller is rotatably supported by a plurality of sets of feed levers attached to a continuous release plate, and the feed roller is supported by a spring on the release plate. A structure is adopted in which a pressing force is applied through the feed lever so that the feed roller is always in contact with the platen, and the release plate can be rotated in the direction away from the platen through the release lever, so the number of parts is small and it is extremely easy to use. A simple mechanism allows for reliable paper feeding and paper release.
It is possible to provide an inexpensive recording device with excellent operability.

[Brief explanation of drawings]

Figures 1 to 3 explain the conventional structure. Figures 1 and 2 are a perspective view and side view of the paper feed mechanism, Figure 3 is a side view of the paper release state, and Figures 4 to 3. Fig. 7 illustrates an embodiment of the present invention, Fig. 4 is a side view, Fig. 5 is a plan view showing the state in which the release plate and feed lever are attached, and Fig. 6 is the state in which the release lever is attached. side view,
FIG. 7 is a perspective view showing the mounting structure of the feed lever and release lever. 1... Recording paper 3... Platen 4... Feed roller 11... Spring 17... Release plate 17a... Second bent portion 19... Feed lever 20... Arm 20a.・Bending part 20b・
...Bottle 21...Opening M1 Figure 2 Figure 3

Claims (2)

[Claims] (1) In a recording device that feeds paper by sandwiching recording paper between a platen and a feed roller that can come into contact with and separate from the platen, the platen is horizontally suspended below the platen so as to be rotatable along the platen, and A release plate to which a pressing force is applied, a plurality of feed levers attached to the release plate, and a feed roller rotatably supported on each set of the plurality of feed levers. A recording device characterized by: (2) A release lever is provided on the side plate of the device at one end of the platen, and the release lever is configured to allow the release plate and the feed lever to be separated from the platen. recording device.