JPH0213411Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] This invention relates to a roll paper holding device in a printer.

[Technical background of the invention] FIG. 6 shows a typical conventional example of this type of roll paper holding device. That is, this conventional device has a pair of arms 2, 2 that are attached substantially parallel to each other at a predetermined interval on the paper feed side of the printer 1, and bosses 3, 3 are provided on the inner surfaces facing each other. are coaxially protruding. In this case, the arms 2, 2 are made of, for example, synthetic resin so as to be elastically deformable, and when holding the roll paper 4, one of the arms 2 is deformed to its outer shape to widen the distance between them. At the top, the bosses 3, 3 are fitted into the center hole 5 of the roll paper 4. However, according to this method, it is necessary to hold down one arm 2 by hand as described above until the roll paper 4 is attached, which is cumbersome to operate. Further, when a force is applied to the arm 2, the printer 1 may be moved by the force, which is a disadvantage.

[Purpose of the invention] This invention was devised in view of the above-mentioned drawbacks of the conventional technology.The purpose of this invention is to provide a roll paper holding device for a printer that allows roll paper to be loaded extremely easily without requiring much force. It is about providing.

[Examples] Hereinafter, this invention will be described in detail with reference to embodiments shown in the accompanying drawings.

Referring to FIG. 1, this roll paper holding device has arms 10, 10 erected in parallel at a predetermined interval on the paper feed side of the printer 1, and has arms 10, 10 erected in parallel with each other at a predetermined interval on the paper feeding side of the printer 1. According to this invention, as illustrated in FIGS. 2 and 3, one arm 10 is provided with a hinge means 1.
A tongue piece member 13 is provided in the shape of a door via 2, and one boss 11 is provided on this tongue piece member 13 in a protruding manner. In this invention, the arm 10 and the tongue member 13 are integrally molded from synthetic resin, and the tongue member 13 is formed by two slit grooves cut parallel to each other from the end of the arm 10.
It is formed to be cut and raised from 0. Also,
The hinge means 12 connects the proximal end of the tongue member 13 to a V
Consisting of a thin hinge cut into a letter shape,
Between the arm 10 and the tongue member 13, as illustrated in FIG. 5, there is a releasable locking means consisting of a protrusion 14 and a recess 15 that engages with an appropriate click force. It is provided. Note that reference numeral 16 is a knob for operating the tongue member 13.

In the above configuration, the tongue member 13 is normally held in a closed state within the arm 10 by the locking means 14 and 15 as shown in FIG.
When installing the roll paper 4, for example, by pulling the knob 16, it is opened outward as shown in FIG. In this state, one end of the center hole 5 of the roll paper 4 is connected to the mating boss 11.
The other end is coaxially aligned with the boss 11, and the tongue piece member 13 is closed. As a result, the boss 11 fits into the other end of the center hole,
Roll paper 4 is rotatably held between a pair of bosses 11, 11. On the other hand, in order to remove the roll paper 4, remove the tongue member 1 as shown in FIG.
Just close 3.

[Effects] As is clear from the above description of the embodiment, according to this invention, there is no need to deform the arm 10 itself when mounting the roll paper 4, so the operation is simple, and the roll paper 4 can be attached easily. A roll paper holding device that can hold roll paper reliably is provided.

Further, since the tongue piece member 13 having the boss 11 can be integrally molded with the arm 10, productivity is high and it is advantageous in terms of cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of this invention;
Fig. 2 is a perspective view showing the essential parts of one arm incorporated in Fig. 1, Fig. 3 is a cross-sectional view taken along the - line in Fig. 2, and Fig. 4 shows a different operating state from Fig. 3. FIG. 5 is a cross-sectional view taken along the line -- in FIG. 2, showing the arm and the tongue member separated, and FIG. 6 is a perspective view of a conventional example. In the figure, 1 is a printer, 10, 10 is an arm, 1
1 and 11 are bosses, 12 is a hinge means, 13 is a tongue member, and 14 and 15 are locking means.

Claims (1)

[Claims for Utility Model Registration] It has a pair of arms made of synthetic resin that are placed opposite each other at a predetermined distance, and a boss is coaxially protruded from each of the opposing inner surfaces of the arms. ,
In the roll paper holding device for a printer which rotatably holds the roll paper by fitting the boss into the center hole of the roll paper, at least one arm has the boss and a thin hinge. A tongue piece member integrally molded on the arm is provided in the form of a door through the arm, and a protrusion and a recess are provided between the arm and the tongue piece member for holding the boss in the fitted position with respect to the center hole. A releasable locking means is provided, and the boss is selected between a fitted position in which it fits into the center hole and a non-fitted position in which it separates from the center hole as the tongue member opens and closes. A roll paper holding device in a printer, characterized in that it is moved automatically.