JPH0764459B2 - Roll paper set device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper setting device such as a printer using a roll-shaped recording medium.

2. Description of the Related Art Conventionally, roll paper setting devices such as printers and plotters that use roll paper insert a set shaft into the paper core of the roll paper and fix the roll paper with flanges from both ends.

FIG. 3 is a cross-sectional view showing a schematic configuration of a conventional roll paper setting device, 1 is a roll paper, 1a is a paper tube around which the roll paper 1 is wound, and 2 is a paper set inserted inside the paper tube 1a. Axis, 3a
And 3b are flanges for fixing the roll paper 1 in contact with the paper tube 1a, 4a and 4b are paper setting pins provided at both ends of the paper setting shaft 2, 5 is a paper setting pin 4b at one end and a spring stopper 6 at the other end. A compression spring attached to the printer, 7a and 7b are side plates of the printer, 8 is a bearing attached to the side plate 7a,
Reference numeral 9 is a rod directly connected to the motor 10.

The operation of the paper setting device configured as described above will be described below.

First, attach the paper set shaft 2 with the flange 3b to the paper tube.
The screw thread (not shown) provided on the flange 3a and the screw thread (not shown) provided on the paper setting shaft 2 are inserted into the inside of the 1a.
And are screwed together to fix the paper tube 1a and the paper setting shaft 2.

Next, when the roll paper 1 attached to the paper setting shaft 2 is mounted on the printer, the paper setting pin 4b is pressed against the rod 9 and the compression spring 6 is compressed. And
In this state, if the paper set pin 4a is aligned with the center of the bearing 8 and the force that is being pressed against the rod 9 is released, the paper set pins 4a and 4b are pressed against the bearing 8 and the rod 9 by the elastic force of the compression spring.

The roll paper 1 mounted on the printer as described above is
If the motor 10 rotates, the roll paper 1 will pass through the paper setting shaft 2.
Was rotated so that paper could be pulled out and rewound.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, when the roll paper 1 is set on the paper setting shaft 2, the flange 3a is rotated and removed, and the roll paper 1 is inserted. It took time. Further, when mounted on the printer, the paper set shaft 2 frequently rotates in the forward and reverse directions, so that the screw portion (not shown) between the paper set shaft 2 and the flange 3a is loosened,
There is a problem that the rotational force of the motor 10 is not accurately transmitted to the roll paper 1.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art, and to provide a roll paper setting device in which the roll paper can be mounted very easily and the rotational force can be accurately transmitted from the motor inside the printer. To do.

Means for Solving the Problems In order to achieve this object, a roll paper setting device of the present invention has a means for fixing a paper setting shaft and a paper tube of a roll paper by friction, and a cutout portion of the paper tube of the roll paper. And a means for transmitting the rotational force of the motor, which are fitted independently to each other, are provided separately from each other on the left and right sides, and a paper setting shaft connecting means is provided on the recording apparatus side.

With this configuration, when setting the roll paper, the work of inserting the paper set shaft into the roll paper core and fixing it with screws is unnecessary. The set axis can be integrated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are cross-sectional views showing a schematic configuration of a roll paper setting device in an embodiment of the present invention. In FIG. 1, 1 is a roll paper, 1a is a paper tube, 2 is a paper setting shaft 10, and a motor is the same as that of the conventional example. Reference numeral 11 is a set holder inscribed in the paper tube 1a, 12 is a projection for fitting into the notches A provided at both ends of the paper tube 1a, 13 is a flange incorporated inside the cassette holder 11, 14
Is the shaft connected to the flange 13, 15 is the shaft
L-shaped slide plate attached to one end of 14, 16
Is a spring wound around the shaft 14, 17 is a leaf spring protruding from a hole (not shown) formed in the slide plate 15, and 18a, 1
Reference numeral 8b is a paper set pin for mounting the roll paper on the printer, and 19 is a bearing provided around the paper set pins 18a and 18b. Further, 20a and 20b are side plates of the printer, 21 is a pedestal of bearings provided around the paper setting pins 18a and 18b, 22 is a drive shaft to which a rotational force is transmitted from the motor 10, and 23 is a paper setting pin 18a. The receiving shaft projection that fits into the concave portion D formed in 24, 24 is a receiving shaft consisting of three parts 24a, 24b and 24c, 25 is a compression spring wound around the receiving shaft 24c, and 26 is the side plate 20a. It is a bracket attached to.

The operation of the roll paper setting device of this embodiment configured as described above will be described below.

First, as shown in FIG. 2, when the roll paper 1 is mounted on the paper setting shaft 2, the paper setting shaft 2 is indicated by arrows B on the right and left sides so that the notches 12 are inserted in the cutouts A of the paper tube 1a. Insert in the direction. At this time, the leaf spring 17 is inscribed in the paper tube 1a, the elastic force of the leaf spring 17 and the frictional force at the contact point between the leaf spring 17 and the paper tube 1a work, and moreover, the pawl 12 fits into the cutout portion A of the paper tube 1a. Therefore, the roll paper 1 and the paper setting shaft 2 are integrated. Needless to say, if the number of leaf springs 17 is increased, the frictional force with the paper tube 1a is increased and the roll paper 1 and the paper setting shaft 2 are fixed more strongly.

Next, when removing the roll paper 1, the flange 13 is held and pulled in the directions indicated by the arrows C, respectively. At this time, the pulled force is transmitted to the slide plate 15 via the shaft 14, and the leaf spring 17 protruding from the hole formed in the slide plate 15 is pushed down to be separated from the paper tube 1a. Therefore, the paper setting shaft can be easily pulled out from the paper tube 1a.

Further, a case where the roll paper 1 adhered to the paper setting shaft 2 is mounted on the printer will be described. In FIG. 1, the paper set pin 18b is connected to the drive shaft so that the rotation is transmitted from the motor 10, and then the other paper set pin 18a is pressed against the receiving shaft projection 23 to be connected in the recess D. It Here, the compression spring 25 provided inside the bracket 26 receives the receiving shaft 24b when the paper setting pin 18a is pressed.
Is compressed by. When the receiving shaft projection 23 is housed in the recess D, the elastic force of the compression spring 25 causes the paper setting pin
18a is connected, and the mounting of the roll paper 1 in the printer is completed. When removing the roll paper 1 from the printer, the receiving shaft projection 23 is pushed toward the side plate 20a, the paper setting pin 18a is removed, and the paper setting pin 18b is pulled out from the drive shaft 22.

As described above, according to the present embodiment, the roll paper 1 can be easily mounted on the paper setting shaft 2 and then mounted on and removed from the printer.

According to the present invention, the fixing means by friction between the paper setting shaft and the paper tube of the roll paper and the means for transmitting the rotational force of the motor by fitting in the notch provided in the paper tube are provided independently. This makes it extremely easy to install and remove the roll paper from the shaft of the paper set, and by providing the paper set shaft connecting means by elastic force on the recording device side such as a printer, This has an excellent effect that the shaft can be easily attached and detached, the roll paper can be easily replaced, and the working time can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a roll paper setting device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of essential parts of the roll paper setting device according to the same embodiment, and FIG. 3 is a cross-sectional view of a conventional roll paper setting device. Is. 1 …… Roll paper, 2 …… Paper set shaft, 11 …… Set halter, 12 …… Pawl, 13 …… Flange, 15 …… Slide plate, 16 …… Spring, 18a, 18b …… Paper set pin, 23 …… Bearing shaft protrusion, 25 …… Compression spring, A …… Notch, D …… Recess

Claims (1)

[Claims] 1. A fixing means provided on a paper setting shaft by a frictional force with a roll paper core, a means for reducing the frictional force, and a notch portion of the roll paper core fitted to the fixing means. A roll paper setting device characterized in that means for transmitting rotational force from a motor are provided independently on the left and right sides, and a connecting means by elastic force is provided on the recording apparatus side.