JPH0638829Y2 - Roll paper holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a roll paper holding device for rotatably holding a roll paper in a label printer or the like.

[Prior art and problems]

In general, a label printer that uses roll paper as recording paper includes a roll paper holding device that can sequentially supply roll paper to a recording unit.

A conventional holding device 30 of this kind is shown in FIG. Reference numeral 31 is a shaft rotatably arranged on the main body. A pair of flange bodies 32 and 33 are attached to the shaft 31. Each flange body 32, 33 is formed in a disk shape, and at the center thereof has mounting holes 35, 36 into which the shaft 31 is inserted, and on the inner surface of each flange body 32, 33 of the hollow core 37 of the roll paper 34. The convex holding portions 38 and 39 which are fitted and held in the openings are integrally provided, and the outer surface is integrally provided with the tubular portions 42 and 43 into which the fixing screws 40 and 41 are screwed. As a result, both ends of the roll paper 34 were sandwiched between the flange bodies 32 and 33, and the convex holding portions 38 and 39 were fitted in the hollow core 37 to hold the roll paper 34.

By the way, in such a conventional holding device 30, the roll paper 34 that can be used by the pair of flange bodies 32 and 33 is limited to only one type having the hollow core 37 having the same diameter. For this reason, it is necessary to prepare several types of flange bodies 32 and 33 corresponding to the diameter of the hollow core 37 of the roll paper 34, and there is a difficulty in cost and storability, and replacement work of the roll paper is difficult. There was a problem.

An object of the present invention is to provide a roll paper holding device that solves the above-mentioned problems existing in the prior art.

[Means for Solving the Problems]

The present invention is a roll paper comprising a pair of flange bodies 4 and 5 for holding the roll paper 2 by sandwiching both ends of the roll paper 2 and inserting the roll paper 2 into the openings 3a and 3b of the hollow core 3 of the roll paper 2. In constructing the holding device 1 of FIG. 3, the hole matrix 9 composed of arcuate holes 9a ..., 9e ... formed at two or more different positions in the circumferential direction and the radial direction of each flange body 4, 5 and the elastic body are used. Integrally formed, and curved in an arc shape having a curvature different from that of the holes 9a, so that the holes 9a can be press-fitted, and the inner surfaces of the flange bodies 4 and 5 when inserted into the holes 9a. Two or more engaging pieces 8a ..., 8e having engaging portions 15 ... Which can be engaged with the inner peripheral surface 3c of the hollow core 3 by protruding to 4i, 5i
It is characterized by comprising ...

[Action]

 Next, the operation of the present invention will be described.

A roll paper holding device 1 according to the present invention comprises a flange body 4,
5, the holes 9a ... Corresponding to the diameter of the hollow core 3 in the roll paper 2 are selected and the engaging pieces 8a are inserted, the engaging pieces 8a. Project to 5i.
Thereby, the roll paper 2 can be held by inserting the engaging pieces 8a into the openings 3a and 3b of the hollow core 3 and engaging the inner peripheral surface 3c. At this time, the engaging pieces 8a ... Can be fixed by being pressed into the hole portions 9a. On the other hand, by removing the engaging pieces 8a ... From this state and replacing the engaging pieces 8a with holes 9e corresponding to other diameters, the hollow cores 3 having different diameters can be similarly adapted.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

First, in order to clarify the present invention, an outline of the label printer will be described with reference to FIG.

50 is a main body, and the holding device 1 according to the present invention is provided at the rear end. Reference numeral 51 is a winding device provided at the front end. The roll paper 2 is held in the holding device 1. The leading end of the recording paper (roll paper 2) sent from the holding device 1 has guide posts 52, ...
A plurality of roller mechanisms 53 composed of driving rollers and driven rollers
, And is wound up by the winding device 51 through the traveling path N formed by the plurality of guide plates 54 and the like. At this time, the roll paper 2 is in contact with the peripheral surface of the photosensitive drum 56 arranged in the center of the main body 50.

On the other hand, a transfer charger 57 is arranged on the traveling path N, and a suction device 58 and a fixing device 59 are arranged on the traveling path N located after the photosensitive drum 56. A main charger 60, a head 61, and a developer 62 are sequentially arranged around the photosensitive drum 56 and on the drum surface before printing. On the other hand, a peeling claw mechanism 55 for peeling the roll paper 2 from the photosensitive drum 56, a cleaner 65 having a sponge roller 63 and a magnet roller 64, and a charge erasing eraser 66 are provided on the drum surface after transfer. I will do it.

Next, the holding device 1 for the roll paper 2 according to the present invention will be specifically described with reference to FIGS. 1 to 4.

First, the configuration of the holding device 1 will be described.

A shaft 6 is rotatably provided on the main body 50 of the printer.

On the other hand, 4 and 5 are a pair of flange bodies which are arranged substantially symmetrically. Each of the flange bodies 4, 5 has a disc shape, and has insertion holes 4a, 5a into which the shaft 6 is inserted in the center thereof,
On the outer surface, cylindrical parts 4b and 5b protruding in the axial direction
4i and 5i are integrally provided with convex holding portions 4c and 5c (diameter is R1) that fit into the smallest hollow core of the roll paper 2. Also,
A set screw 12 for fixing the flange body 4 to the shaft 6 is provided on the tubular portion 4b. In addition, the tubular portion 5b includes the insertion hole 5a and the shaft 6
Can be press-fitted and fixed in advance. In this case, a set screw may be used similarly to the tubular portion 4b.

On the other hand, at the position of R2, which has a larger diameter than the convex holding portion 4c in the flange body 4 (similarly to the flange body 5), hole portions 9e, 9f ... Arrange at 90 ° intervals. Further, at positions of R3 having a diameter larger than the diameter R2, hole portions 9a, 9b ... Similarly formed by arcuate slits along the circumferential direction are arranged at 90 ° intervals in the circumferential direction. With the above configuration, the hole matrix 9 in which a plurality of holes 9a are arranged is formed on the surface of the flange 4 as shown in FIG.

Further, four engaging pieces 8a shown in FIG. 4 are prepared. Engagement piece 8a
Is integrally formed of an elastic material such as synthetic resin, and includes an engaging portion 15 curved in an arc shape that can be inserted into the holes 9a ..., and a flange portion 16 extending in a direction perpendicular to one end. Engagement part 15 and hole
9a ... has a different arcuate curvature, and the elasticity of the engaging portion 15 causes a hole
Can be pressed into 9a. A notch 17 is provided at the center of the collar 16 so that the engaging portion 15 is easily bent.

Next, a method of using the roll paper holding device 1 will be described.

First, the holes 9a corresponding to the diameter of the hollow core 3 of the roll paper 2 to be supported are selected, and the engagement pieces 8a are inserted from the outer surface side to the inner surface side. In this case, as shown in FIG. 3, the engaging portion 15 is deformed against the elasticity and can be pressed into the holes 9a. At this time, the notch 17
The engaging portion 15 can be easily deformed by the
Acts as a stopper.

Therefore, the hollow core 3 of the roll paper 2 is passed through the shaft 6,
Engagement piece on the other flange body 5 that is fixed in advance
8e ... Is inserted into the opening 3b of the hollow core 3 and engaged with the inner peripheral surface 3c thereof. Next, one flange body 4 is fitted into the shaft 6, and the engaging pieces 8a ... Are inserted into the openings 3a of the hollow core 3 and engaged with the inner peripheral surface 3c. Then, by rotating and fixing the set screw 12, the roll paper 2 can be held in the holding device 1. Further, in the case of the roll paper 2 having hollow cores having different diameters, the engaging pieces 8a ... Can be removed and replaced with the hole portions 9e .. at positions of other diameters, which can be easily changed. .
As a result, the set of flange bodies 4 and 5 can be commonly used for a plurality of different types of roll paper.

The above-described embodiment is advantageous in that it is cost-effective and can be carried out only by drilling the existing flange body.

Incidentally, as another embodiment, the engagement pieces 8a ...
5 may be mounted so that its position can be changed, and can be set steplessly by cooperating symmetrically. Further, it is desirable that the number of engaging pieces for supporting the roll paper is three or more, but it is also possible if the curved surface of the engaging portion of the engaging piece is formed so as to make surface contact with the hollow core.

Although the embodiments have been described in detail above, the present invention is not limited to such embodiments, and detailed configurations,
The shape, quantity, material, etc. can be arbitrarily changed and implemented without departing from the gist of the present invention.

[Effect of device]

As described above, the roll paper holding device according to the present invention is integrally formed by the elastic body with the hole matrix including the arcuate hole portions formed at two or more different positions in the circumferential direction and the radial direction of each flange body. In addition, it is formed into a bow shape having a curvature different from that of the hole so that it can be press-fitted into the hole, and when inserted into the hole, it projects to the inner surface of the flange body and engages with the inner peripheral surface of the hollow core. Since two or more engaging pieces having engaging parts that can be fitted are provided, the following remarkable effects are obtained.

Since it can be implemented by combining the hole and the relatively small engaging piece, cost (economy), storability, and easiness of change can be dramatically improved.

Since the existing flange body can be processed and used as it is, it is versatile.

[Brief description of drawings]

FIG. 1: Partial cross-sectional side view of a holding device according to the present invention, FIG. 2: Partial front view of a flange body of the holding device, and FIG. 3: Relationship between engagement piece and hole in the holding device. FIG. 4 is an inner view showing the same, FIG. 4 is a perspective view of the engaging piece, FIG. 5 is a sectional side view of a holding device according to the prior art, and FIG. 6 is a front view showing an outline of a label printer. In the drawing, 1: holding device, 2: roll paper 3: hollow core, 3a, 3b: opening 3c: inner peripheral surface, 4,5: flange body 4i, 5i: inner surface, 8a ...: engagement piece 9 : Hole matrix, 9a ...: Hole 15: Engagement part

Claims (1)

[Scope of utility model registration request] 1. A roll paper holding device comprising a pair of flanges for holding the roll paper by sandwiching both ends of the roll paper and inserting the roll paper into an opening of a hollow core of the roll paper.
A hole matrix composed of arcuate hole portions formed at two or more different positions in the circumferential direction and the radial direction of each flange body is integrally formed with an elastic body, and is curved in an arc shape having a curvature different from that of the hole portion. Two or more having an engaging portion that is formed so as to be press-fitted into the hole portion and that projects into the inner surface of the flange body when inserted into the hole portion and is engageable with the inner peripheral surface of the hollow core. A roll paper holding device comprising an engagement piece.