JPH0321967Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for attaching a pinch roller in a printer.

[Prior Art] Conventionally, the mounting structure of the pinch roller in a printer has been such that a shaft is installed between frames that are swingable against a spring and are provided facing each other, and the pinch roller is supported by this shaft. By swinging this frame, the pinch roller is separated from the paper feed roller, and the printing paper is inserted between them, and then by returning the frame to its original position, the pinch roller comes into elastic contact with the paper feed roller. It was hot.

[Problems to be solved] As a result, the entire structure is complex, requires a large mechanical space, and is complicated to assemble.Also, when inserting paper, it is necessary to swing the frame to release the pinch roller, resulting in poor operability. It was bad.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pinch roller mounting structure that has a simple structure, reduces the number of parts, does not require fasteners, is easy to assemble, and occupies less space in the mechanism.

Another object of the present invention is to provide a pinch roller mounting structure that eliminates the need to release the pinch roller when inserting paper and improves operability when using the printer.

[Means for Solving the Problems] The present invention is characterized in that a paper guide body that extends along the paper feed roller is fixed at a position close to the paper feed roller, and there are A bearing part is arranged, and an elongated hole and a mounting hole for partially enlarging the diameter of this elongated hole are bored on the line connecting both bearing parts of the paper guide body, and both ends are inside the elongated hole. An elastically deformable axis supported by the bearing part is inserted, a pinch roller attached to the middle part of the axis is inserted into the mounting hole, and a pinch roller is inserted into the paper guide body from between the paper feed roller and the pinch roller. There is a guide groove drilled there for feeding out the recording paper.

[Example] Embodiments of the present invention will be described based on the drawings.

In FIG. 1, a printing mechanism and a paper feeding mechanism are installed inside a frame constituted by an upper case 1, a lower case 2, and a lid 3. As shown in FIG.

By the way, there are two support plates (base plate) inside the frame.
4, 4 are installed on the lower case 3 facing each other.
Between the base plates 4, 4, two guide plates 6, 7 forming a guide path 5, two paper feed rollers 8, 9,
A platen 10 and the like are installed, and a hammer 12 which is driven by a printer head 11 for printing is located in front of the platen. A recording paper 13a pulled out from a roll paper 13 rotatably supported by the upper case 1 passes through a guide passage 5 and is printed by a hammer 12.

By the way, the pinch roller attachment structure according to the present invention is a structure in which the pinch roller 17 is attached to the paper guide body 16.

As shown in FIGS. 1 and 4, the paper guide body 16 is installed and fixed between the support plates 4, 4 at a position close to the paper feed roller 9, and is stretched along the paper feed roller 9. It is something that exists. As shown in the second figure, bearings 6 are provided on the inner surfaces of both sides of the paper guide body 16.
a, 6a are formed. Note that the bearing parts 6a, 6a
can be formed on the paper guide body 16 itself, but may also be formed on the guide plate 6 to which the paper guide body 16 joins, as shown in FIG. The bearing portion may be formed by.

On a line connecting the bearing parts 6a, 6a of the paper guide body 16, an elongated hole 16a and two attachment holes 16b, 16b, which partially enlarge the diameter of this elongated hole, are bored. Therefore, there is a pinch roller 1 in the middle part.
To attach the shaft 18 made of an elastically deformable material, such as stainless steel, to which the shafts 7 and 17 are attached, to the paper guide body 16, bend this shaft and bring both ends of the shaft close together. Axis line 1
When the end of 8 is inserted into the elongated hole 16a and released,
Due to the restoring force, both ends of this axis are
Pinch rollers 17, 17 are pivotally supported at a, 6a.
are inserted into the mounting holes 16b, 16b.

Pinch roller 1 installed in this way
7 comes into elastic contact with the paper feed roller 9 and helps the paper feed roller to feed the recording paper 13a. Further, the paper guide body 16 is provided with a guide groove 16c above the paper feed roller 9 for feeding out the recording paper 13a sent out by the paper feed roller and the pinch roller 17, as shown in the fourth figure. It has been done. Furthermore, the end surface of the paper guide body 16 below the installation position of the pinch roller 17 is formed in an inclined shape to serve as a guide surface 16d, and this guide surface guides the printed recording paper 13a between the paper feed roller 9 and the pinch roller 17. This is to guide you in between.

Since the paper guide body 16 is close to the paper feed roller 9, it is also necessarily close to the platen 10, and therefore the recording paper 13a is pressed toward the paper feed roller 9 by the pinch roller 17 at a position close to the printing section. As a result, vibrations of the recording paper can be easily suppressed and printing noise can be reduced.

Therefore, the operation when inserting the recording paper 13a will be explained. Recording paper 1 pulled out from roll paper 13
When the tip of the recording paper 3a is inserted through the guide path 5, it is caught between the paper feed roller 8 and a friction roller (not shown), and the recording paper moves up inside the guide path due to the driving force of this paper feed roller. The image is then passed in front of the platen 10 and printed by the hammer 12 at this time. Further, the recording paper 13a is guided between the paper feed roller 9 and the pinch roller 17 along the guide surface 16d at the lower end of the paper guide body 1, passes through the guide groove 16c by the paper feed roller, and is further guided through the outer case. 1 and the lid 3 to exit the frame.

[Effects] As described above, according to the present invention, the structure is simpler than the conventional structure, the number of parts is small, the work to incorporate the pinch roller is easy, and there is no need to release the pinch roller when inserting paper, making it easier to use the printer. It is easy to operate, and can also reduce printing noise by suppressing the vibration of the recording paper.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of the entire printer device, FIG. 2 is a front view of the main parts, FIG. 3 is a sectional view taken along the line of FIG. 2 is a sectional view taken along the line in FIG. 2, and FIG. 5 is a sectional view taken along the line in FIG. 4... Support plate, 6a... Bearing part, 9... Paper roller, 16... Paper guide body, 16a... Elongated hole, 1
6b...Mounting hole, 16c...Guide groove, 16d...
...Guide surface, 17...Pinch roller, 18...Axis line.

Claims (1)

[Claims for Utility Model Registration] (1) In a printer in which recording paper is inserted between a paper feed roller and a pinch roller that is in elastic contact with the paper feed roller, and the paper is fed by the paper feed roller. A paper guide body extending along the paper feed roller is fixed at a position close to the paper feed roller, and bearings are arranged on the inner surfaces of both sides of the paper guide body, An elongated hole and a mounting hole that partially enlarges the diameter of this elongated hole are bored on the line connecting the above-mentioned both bearing parts of the paper guide body, and inside the elongated hole, both ends are attached to the above-mentioned bearing part. A pivotably supported elastically deformable axis is inserted, the pinch roller attached to the middle part of the axis is inserted into the mounting hole, and the paper guide body has the paper feed roller and the A structure for mounting pinch rollers in a printer, characterized in that a guide groove is provided for feeding out the recording paper fed out from between the pinch rollers. (2) Claim 1 of the utility model registration claim is characterized in that a paper guide surface is formed on the leading end surface of the paper guide body to guide the recording paper between the paper feed roller and the pinch roller. Mounting structure of pinch roller in printer.