JPH089434B2 - Roll paper holder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll paper holder that can be used in printers and the like.

2. Description of the Related Art Generally, a roll paper holder as shown in FIGS. 4 and 5 is used in a printer.

An example of a conventional roll paper holder will be described below with reference to the drawings.

4 and 5 show a conventional roll paper holder. In both figures, 1 is roll paper, 2 is a shaft, 3 is a roll paper holder, and 4 is a case.

The operation of the roll paper holder configured as described above will be described below.

First, the shaft 2 is penetrated through the core of the roll paper 1, and both ends of the shaft 2 are fitted into the U-shaped roll paper holder 3 fixed to the inner wall of the case 4. When the roll paper 1 is used, it rotates using the roll paper holder 3 as a bearing and the shaft 2 as a rotation axis.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a roll paper holder, since the shape is U-shaped and the insertion opening is upward,
It is very difficult to fit the roll paper and the shaft into the roll paper holder inside the case due to the small space. Also, because the shaft is only placed on the roll paper holder, when strong vibration is applied,
If the device is tilted or turned upside down, it is easy to fall off.

In view of the above problems, the present invention provides a roll paper holder having a structure in which the roll paper can be easily mounted and which is unlikely to drop off after the mounting.

Means for Solving the Problems In order to solve the above problems, the roll paper holder of the present invention can be inserted into the core hole of the roll paper, and has a retractable shaft biased in the extension direction by a coil spring and a case. And a pair of roll paper holders each having a U-shaped groove into which both ends of the shaft are inserted, and a triangular cross-section rib projecting toward the shaft in a part of the U-shaped groove. It is a thing.

Action The present invention has the above-described configuration so that the U-shaped groove is directed in the direction of inserting the roll paper, the roll paper can be easily inserted, and the inserted roll paper does not return when the shaft reaches the regular position. By providing ribs of triangular cross section, the ribs are completely fixed, and after the roll paper is attached, the rolls are rotated so that the U-shaped groove inlet faces upward so that the shaft does not easily come off.

Embodiment A roll paper holder according to an embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1, 2, and 3, 1 is a case,
2 is a case lid, 3 is a lid holder, 4 is roll paper, 5 is a shaft, 6 is a flange for fixing the roll paper, 7 is a coil spring, 8 is an E-shaped washer, and 9a.
9e constitute a pair of roll paper holders, 9a is a U-shaped groove of the roll paper holder, 9b is a triangular cross-section rib provided in a part of the U-shaped groove so as to project toward the shaft 5, and 9c is a roll. The roller holder provided on the paper holder, 9d is the spring fixing part provided on the roll paper holder, 9e is the rotating shaft of the roll paper holder, 10
Is a roller, 11 is a spring for rotating the roll paper holder, 12 is a fixture for fixing the roll paper holder to the case, and 13 is a screw for fixing the fixture.

The operation of the roll paper holder configured as described above will be described below with reference to FIGS. 1, 2, and 3.

As shown in FIG. 2, the shaft 5, the flange 6, and the coil spring 7 are assembled in the core hole of the roll paper E.
The one fixed by the mold washer 8 is inserted as a shaft, and both ends of the shaft 5 are inserted into the U-shaped groove 9a of the roll paper holder as it is as shown in FIG. Second
As shown in the figure, since the shaft 5 is configured to be expandable and contractible and is urged in the extending direction by the coil spring 7,
The triangular cross-section rib 9b provided in the U-shaped groove 9a is passed over and completely fitted.

Next, as shown in FIG. 1, when the case lid 2 is closed, the roller 10 rotates along the cam portion of the lid holder 3 and U
The inlet of the character-shaped groove 9a rotates about the rotary shaft 9a, and the roll paper 4 moves upward from the direction in which the roll paper is inserted into the case 1 so that the roll paper 4 is unlikely to drop off. When the case lid 2 is opened reversely, the U-shaped groove 9a rotates in the above-described reverse direction, and the roll paper 4 stops at a position where it can be easily removed.

As described above, according to the present invention, by rotating the U-shaped groove so that the direction of the U-shaped groove is changed, the work of attaching / detaching the roll paper can be easily performed, and a triangular cross-section rib is formed in a part of the U-shaped groove. By providing the device, it is possible to obtain a configuration in which the roll paper and the shaft do not easily come off even when the device is subjected to vibration or impact, or when the device is installed at an angle.

[Brief description of drawings]

FIG. 1 is a side view of a roll paper holder and its peripheral portion in an embodiment of the present invention, and FIG. 2 is a partial sectional view thereof.
FIG. 3 is a partial detailed view thereof, FIG. 4 is a side view of a conventional holder, and FIG. 5 is a partial sectional view thereof. 9a ... U-shaped groove, 9b ... Triangular rib, 9c ... Roller holding part, 9d ... Spring fixing part, 9e ... Rotating shaft.

Claims (1)

[Claims] 1. A pair of expandable and retractable shafts which can be inserted into a core hole of a roll paper and are urged in an extension direction by a coil spring, and U-shaped grooves which are rotatably mounted on a case and into which both ends of the shafts are inserted. Of the U-shaped groove, and a triangular cross-section rib provided in a part of the U-shaped groove so as to project in the direction of the shaft, the roll-paper holder part has an inlet of the U-shaped groove in the roll-paper insertion direction of the case. And a roll paper holder that is rotatably attached so as to face upward.