JPH0541818U - Roll paper feeder - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure that roll paper can be set in the specified curl direction. [Structure] When the roll paper is set in the roll paper setting position 1 in the wrong curl direction, the receiving roller 3 is prevented from rotating.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roll paper supply device equipped with a set error prevention mechanism when setting roll paper such as a receipt paper used in an electronic cash register (ECR), for example.

[0002]

[Prior Art]

 For example, a sheet that is continuously fed to a device such as a printer, such as a receipt sheet used for ECR, is generally wound in a roll shape. This roll paper is mounted at the set position in the roll paper supply device and guided from the set position to a predetermined device via the paper feed path.

FIG. 3 is a diagram showing an example of a paper feed path of the roll paper feeder. One end of the roll paper rotatably set at the setting position 11 is inserted into the insertion port 12, passes between the guide plates 14 by the rotation of the roller 13, and reaches the roller 15. Further, it is fed from the roller 15 between the print head 16 and the platen 17 and printed, and is fed to the outside by the roller 18 or wound by the winding device 19. The rollers 13, 15, 18 and the guide 14 which constitute these paper feed paths are all attached assuming the case where the roll paper is curled inside the paper feed path. That is, the paper feed path is configured so that the curl direction of the roll paper is defined as one winding direction. This is because the ease of passage of roll paper in the paper feed path is taken into consideration, which prevents the occurrence of jams. Conventionally, in such a roll paper feeding device, the roll paper can be rotated in the front-back direction by passing a shaft rod through a core or by placing it on two rotating rollers provided at the bottom of the setting position. Was set to.

[0004]

[Problems to be solved by the device]

 However, in the roll paper supply device described above, the curl direction of the roll paper in the paper feeding path is defined as one direction, whereas the rotation direction of the roll paper set in the setting position 11 is not defined at all. It was Therefore, there is no problem when the roll paper is set as shown in FIG. 4, but when it is set as shown in FIG. 5 and the curl direction of the roll paper inserted from the insertion slot 12 is opposite to the specified curl direction, There was a problem that the paper would get out of the paper path or jam inside the guide plate 14. Also, even if it passes the paper feed path well, the rotational force of the roller 13 becomes weak, so the paper feed pitch becomes uneven during printing, and the roll paper is pulled in the rotational direction, so the remaining amount is small. There was a problem that the rolled paper fell off the rotating roller and the remaining paper detector outside the figure malfunctioned.

An object of the present invention is to prevent the roll paper from rotating at the setting position during paper feeding when the roll paper is set in the direction opposite to the specified curl direction, and to ensure that the paper is fed to the paper feeding path in the correct curl direction. It is an object to provide a roll paper supply device that can set roll paper so that it can be inserted.

[0006]

[Means for Solving the Problems]

 The roll paper supply device of the present invention is characterized in that it is provided with a rotation direction control means for rotating the rotatably set roll paper only in the specified curl direction.

[0007]

[Action]

 In this invention, when the roll paper is set in the curl direction defined by the paper feed path, the roll paper is smoothly rotated and fed at the setting position. On the other hand, if the rotation direction of the roll paper at the time of setting is opposite, rotation of the roll paper is blocked by the rotation direction control means and the paper is not fed.

[0008]

【Example】

 FIG. 1 and FIG. 2 are views showing the configuration of the main part of a roll paper supply device according to an embodiment of the present invention. At the roll paper setting position 1 of the roll paper supply device, two receiving rollers 3 supported by a shaft rod 2 are rotatably provided. The receiving roller 3 is provided with a rubber ring 4 for increasing the frictional resistance with the roll paper, and a convex shape 5 is provided on a part of the side surface. Further, a plate-shaped elastic member 6 is provided at the bottom of the roll paper setting position 1, and when the receiving roller 3 rotates clockwise, the elastic member 6 comes into contact with the convex shape 5 and receives the receiving roller 3. Block the rotation of 3. The receiving roller 3 and the elastic member 6 having the convex shape 5 correspond to the rotation direction control means of the present invention.

When the roll paper is properly set at the roll paper setting position 1 of the roll paper supply device configured as described above, when one end of the roll paper is pulled at the time of paper feeding as shown in FIG. The paper rotates clockwise and the receiving roller 3 rotates counterclockwise. At this time, the convex shape 5 of the receiving roller 3 rotates while pushing down the elastic member 6 so that the paper can be smoothly inserted into the paper feeding path. On the other hand, if the roll paper is set in the roll paper setting position 1 in the wrong direction, the roll paper rotates counterclockwise and the receiving roller 3 rotates clockwise as shown in FIG. The partial shape 5 abuts against the end of the elastic member 6 and the rotation of the receiving roller 3 is blocked, and the roll paper is also difficult to rotate due to friction with the rubber ring 4.

As described above, according to the present invention, if the roll paper set in the roll paper setting position 1 is rotated in the wrong direction, the receiving roller 3 does not rotate, and only when the roll paper is set correctly Since it rotates in the direction of, the setting error can be easily detected when inserting the paper into the paper feed path when setting the roll paper.

[0011]

[Effect of the device]

 According to this invention, when the curl direction of the roll paper is different from the curl direction defined in the paper feed path, the rotation direction control means provided at the setting position prevents the roll paper from rotating. , It can be set in the correct rotation direction without fail, and even beginners can set roll paper easily and accurately.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a main part of a roll paper supply device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a configuration of a main part of the roll paper feeder.

FIG. 3 is a diagram illustrating a paper feed path of a roll paper supply device.

FIG. 4 is a diagram showing roll paper set in a set position in a correct rotation direction.

FIG. 5 is a diagram showing roll paper set in a setting position in an incorrect rotation direction.

[Explanation of symbols]

 1 Roll paper setting position 3 Receiving roller 5 Convex shape 6 Elastic member

Claims (1)

[Scope of utility model registration request] 1. A roll paper supply device in which the curl direction of the roll paper in the paper feed path is defined as one direction, and a roll direction control means for rotating the roll paper set rotatably only in the defined curl direction. A roll paper supply device characterized by being provided with.