JP2500481Y2 - Roll paper holding device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper holding device used in a label printer or the like.

[0002]

2. Description of the Related Art A roll paper holding device used in a conventional label printer or the like is adapted to print on a roll of printing paper or a label sheet, for example. Therefore, a conventional example of such a roll paper holding device will be described with reference to FIG. In the roll paper holding device illustrated here, elongated grooves 2 are formed in the axial direction on both sides of the roll paper support shaft 1 fixed to the main body frame, and the roll paper support shaft 1 is made of a bar material bent in the grooves 2. The clamp 3 is adapted to be detachably fitted.

In such a roll paper holding device having such a structure, the roll paper support shaft 1 having the clamp 3 removed from the groove 2 supports the label sheet 4 which is roll paper and mounts the clamp 3. The label sheet 4 is rotatably held between the clamp 3 and the body frame.

[0004]

In the roll paper holding device as described above, the clamp 3 mounted on the roll paper support shaft 1 is used.
By rotatably supporting the label sheet 4 between the main body frame and the main body frame and supplying the label sheet 4 to a printing mechanism or the like, it is possible to perform a work such as label issuing.

In the roll paper holding device having the above structure, the label sheet 4 is held while being pressed by the clamp 3 against the main body frame, so that the clamp 3 is mounted at an appropriate position. Has become difficult. That is, when the clamp 3 is attached to the roll paper support shaft 1 so as to strongly press the label sheet 4, it becomes difficult for the label sheet 4 to smoothly rotate due to frictional force, which causes step out and the like. When the clamp 3 is mounted on the roll paper support shaft 1 so as to be slightly separated from the label sheet 4, the label sheet 4 fluctuates in the axial direction, and meandering or the like occurs. Therefore, it is desired to propose a mechanism for easily holding the roll sheet such as the label sheet 4 in a good state.

[0006]

A roll paper support shaft having an opening groove formed with an engagement groove in the circumferential direction and formed axially from the tip end portion is fixedly provided in a main body housing, and an opening of the roll paper support shaft is provided. A holding member having an engaging portion that is inserted from the groove and that engages with the engaging groove in a disengageable manner is provided, and a slide member that is slidably supported on the roll paper support shaft in the axial direction is provided on the roll paper support shaft. An elastic member is provided that urges the distal end from the end of the.

[0007]

The roll paper rotatably supported on the roll paper support shaft is elastically held between the holding member and the slide member by the urging force of the elastic member. The shaft can be supported in a smoothly rotatable state without changing in the axial direction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A roll paper holding device of the present invention will be described with reference to the drawings. First, in the roll paper holding device of this embodiment, as illustrated in FIG. 1, an opening groove 5 is formed in the axial direction from the tip end portion and a plurality of engagement grooves 6 are formed in the circumferential direction from the opening groove 5. The rolled roll paper support shaft 7 is fixedly provided on the box-shaped main body frame 9 with bolts 8. In this roll paper holding device, a box-shaped cover for the main body frame 9 is provided between the main frame 9 and a slide member 10 slidably supported by the roll paper support shaft 7 in the axial direction. A spring 11 as an elastic member is inserted, and guide bolts 12 attached to both sides of the slide member 10 are slidably locked in long grooves 13 formed on both sides of the body frame 9, The slide member 10 does not come off the roll paper support shaft 7. Further, in this roll paper holding device, the holding plate 1 which is a holding member in which the engaging portion 15 is formed between the two semicircular through holes 14.
6 engages with a predetermined engagement groove 6 of the roll paper support shaft 7.

With such a construction, in this roll paper holding device, as illustrated in FIG. 3A, the label sheet 4 is pressed so that the slide member 10 is pressed against the roll paper support shaft 7 from which the holding plate 16 is removed. 2A, the holding plate 16 is inserted from the tip of the roll paper support shaft 7 so that the engaging portion 15 is located in the opening groove 5, as shown in FIG. The holding plate 16 is rotated to engage the engaging portion 15 with the predetermined engaging groove 6 as illustrated in FIG.
By doing so, as illustrated in FIG. 3B, the label sheet 4 on the roll paper support shaft 7 is elastically held between the slide member 10 and the holding plate 16 by the elastic force of the spring 11. Therefore, the label sheet 4 that smoothly rotates without changing in the axial direction of the roll paper support shaft 7 can be used to perform good printing without step out or meandering. Moreover, in this roll paper holding and mounting, by using the spring 11 having a small spring constant, the sliding member 1
Even if the sliding amount of 0 is large, the fluctuation of the elastic force is small. Therefore, even if the error in the width of the label sheet 4 is large, it is possible to carry out the roll paper holding and mounting which can hold the roll sheet with a uniform elastic force.

In this roll paper holding device, a plurality of engagement grooves 6 are formed in the roll paper support shaft 7, so that a plurality of types of label sheets 4 having different widths can be used.
Further, in this roll paper holding device, the roll paper support shaft 7
By forming the rounded corners between the opening groove 5 and the engaging groove 6, it becomes easy to rotate the holding plate 16 inserted in the opening groove 5 to engage with the engaging groove 6. There is.

Further, in the present embodiment, the label sheet 4 in which the label is attached to the long and narrow mount is exemplified as one of the roll papers, but the roll paper mentioned here is a long sheet body wound. For example, it contains a printing paper, a film, an ink ribbon, or the like.

[0012]

As described above, according to the present invention, a roll paper support shaft having an opening groove formed with an engagement groove in the circumferential direction and formed axially from the tip end is fixedly provided in the main body housing, A holding member is provided that is inserted from the opening groove of the support shaft and has an engaging portion that engages with the engagement groove in a disengageable manner, and a slide member that is slidably supported on the roll paper support shaft in the axial direction is provided. An elastic member for urging the roll paper support shaft from the end to the tip is provided, and the roll paper rotatably supported on the roll paper support shaft is supported by the elastic member urging force between the holding member and the slide member. By keeping elastic between
Since the roll paper can be rotatably supported in a freely rotatable state without changing in the axial direction of the roll paper support shaft, it is possible to contribute to good printing and the like in which no step out or meandering occurs, and moreover, Since such good holding of the roll paper is obtained by the engagement of the holding member and the roll paper support shaft, the operability thereof is good and the work efficiency can be improved. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a front view illustrating the operation of the main part.

FIG. 3 is a cross-sectional plan view for explaining the operation of the main part.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 4 Roll Paper 5 Opening Groove 6 Engagement Groove 7 Roll Paper Support Shaft 9 Body Frame 10 Sliding Member 11 Elastic Member 15 Engaging Part 16 Holding Member

Claims (1)

(57) [Scope of utility model registration request] 1. A main body housing, a roll paper support shaft fixedly provided in the main body housing, wherein an opening groove having an engagement groove formed in a circumferential direction is axially formed from a tip end portion,
A holding member that is inserted from the opening groove of the roll paper support shaft and has an engaging portion that engages with the engagement groove in a disengageable manner, and is supported slidably in the axial direction on the roll paper support shaft. A slide member and a roll paper rotatably supported on the roll paper support shaft by urging the slide member from the end portion of the roll paper support shaft toward the tip end portion and the slide member. A roll paper holding device comprising an elastic member that elastically holds the member.