JP2019014543A - Support tool for roll sheet - Google Patents

Abstract

To provide a support tool for a roll sheet capable of inhibiting defective printing from being caused by using a deformed roll sheet.SOLUTION: A support tool 9 is formed in such a manner that two layers of an elliptical layer 21 and a perfect circular layer 22 are integrated. The elliptical layer 21 is formed in a columnar form having an approximately elliptical bottom. The perfect circular layer 22 is formed in a columnar form having an approximate circular bottom. In the support tool 9, a deformed paper roll body 10 can be supported by the elliptical layer 21, and the paper roll body 10 having a core hole which is not deformed can be supported by the perfect circular layer 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a roll paper support that is used by being attached to a printer in a state of being fitted in a core hole of the roll paper in order to stabilize the rotation axis of the roll paper in a printer (printing apparatus).

  As a means of feeding paper to the printer, there is a paper that feeds paper by loading the roll paper wound in a substantially cylindrical shape around the core material into the printer and pulling the paper from the roll paper with the power of a motor or the like. .

  In printers that use roll paper, in order to stabilize the rotation axis of the roll paper, the core hole of the roll paper (refers to the space that can be formed at the center of the roll of paper; In some cases, a substantially cylindrical support is fitted in the space, and the support is fixed at a predetermined position of the printer (for example, an ink jet recording apparatus described in Patent Document 1).

JP 2009-23171 A

  In recent years, the core-free roll paper called “coreless”, which is wound without using core material, has also adopted the paper feeding means described above in order to reduce environmental costs and reduce the cost of roll paper production. Widely used in printers that do this.

  However, roll paper that does not use a core material may be deformed by a force received from the outside during transportation or storage. In particular, when a force substantially perpendicular to the substantially cylindrical side surface is applied, the shape of the roll paper is distorted, whereby the shape of the core hole is also distorted from the original substantially cylindrical shape.

  The above-mentioned support device assuming a substantially cylindrical core hole is configured to insert a substantially cylindrical portion into the core hole, and cannot be fitted into the strained core hole. When the support tool cannot be fitted into the core hole of the roll paper, it is impossible to feed paper in a printer on the premise that the roll paper is loaded via the support tool.

  In a printer having a structure in which roll paper and a support are rotated around a shaft, it is also possible to feed only the shaft through the roll paper without using the support and rotate the roll paper freely. However, if the deformed roll paper can be freely rotated, there is a large difference in the vertical position of the rotation axis of the roll paper between when the recessed portion is lifted upward and when the swollen portion is lifted upward. The power required for the printer to pull in the paper becomes unstable. If the printer cannot stably pull in the paper, printing misalignment or unevenness occurs.

  As described above, the conventional support has a problem that the printing function of the printer is defective when the roll paper is deformed.

  The present invention has been made to solve this problem and the like, and an object of the present invention is to provide a roll paper support that can suppress printing defects caused by using deformed roll paper.

  The present invention provides a roll paper support that stabilizes the rotation axis of the roll paper by being attached to a printer in a state of being fitted into a core hole of the roll paper, and is a columnar first having a substantially elliptical shape as a bottom. A fitting portion is provided, and the first fitting portion is inserted into the core hole of the roll paper from the bottom so as to be fitted into the core hole of the roll paper. This is a roll paper support.

  In the invention of the present application described above, a substantially cylindrical second fitting portion having the same center axis as the first fitting portion is provided, and the second fitting portion and the first fitting portion are provided. The structure characterized by being integrally molded is proposed.

  According to the roll paper support of the present invention, the first fitting portion inserted into the core hole of the roll paper is formed in a columnar shape with a substantially flat bottom, so that the core is deformed by the deformation of the roll paper. Even when the hole is distorted, the first fitting portion can be inserted in accordance with the distortion. When the roll paper is deformed, the original is a cylindrical shape, and in many cases, both the roll paper and the core hole are often deformed into an elliptical column shape. Therefore, by supporting the roll paper with the columnar first fitting portion having a substantially elliptical bottom, the deformed roll paper is in the vertical state (the long diameter is substantially vertical). In the state where the long diameter tip of the fitting part lifts the core hole upward and the roll paper is in the horizontal state (the long diameter is substantially horizontal), the short diameter tip of the first fitting part is the core hole. To support. As a result, the deviation between the rotation axis of the roll paper and the rotation axis of the roll paper support is reduced, and the roll paper rotates stably, so that the occurrence of printing defects by the printer can be suppressed. Therefore, according to the roll paper support of the present invention, there is an effect that the occurrence of defective printing can be suppressed even when deformed roll paper is used.

  Further, in the roll paper support of the present invention, the column-shaped first fitting part having a substantially elliptical bottom is inserted into the core hole of the deformed roll paper, and fitted to the roll paper. Can do. Therefore, according to the roll paper support of the present invention, there is an effect that the rotation of the roll paper deformed into an elliptical column shape can be further stabilized.

  In addition, the roll paper support of the present invention includes a second fitting portion having a substantially cylindrical shape that has the same axis as the first fitting portion, in addition to the first fitting portion. The unrolled paper can be supported by the second fitting portion. Therefore, according to the roll paper support of the present invention, the first fitting portion and the second fitting portion can be selectively used depending on whether or not the roll paper is deformed. There is also an effect that loading is easy.

2A is a schematic side view illustrating the printer 1, and FIG. 2B is a schematic top view illustrating the printer 1. FIG. It is a perspective view explaining the support tool. (A) The short diameter side view schematic diagram explaining the support tool 9, (b) The long diameter side view schematic diagram explaining the support tool 9. It is a schematic diagram of the upper view explaining the support tool 9. FIG.

(Example)
A support 9 will be described as an example of a roll paper support according to the present invention (hereinafter referred to as “the present invention”). The support 9 is a component that supports the paper roll body 10 in which the paper 11 is wound in a roll shape in the printer 1 described later.

  First, the configuration of the printer 1 in which the support tool 9 is used will be described with reference to FIG. FIG. 1A is a schematic side view of the printer 1. As shown in FIG. 1A, the printer 1 includes a printer main body 2 and a stand 6 attached to the main body 2.

  The printer main body 2 includes a conveyance guide 3, a printing unit 4, and a conveyance roller 5. The conveyance guide 3 is a component that guides the paper 11 supplied from the outside of the printer main body 2. The printing unit 4 is a component that performs predetermined printing on the paper 11 by computer control, and a known printing method such as a thermal (thermal transfer) method or an ink jet method is employed. The transport roller 5 is a component that is rotated by a motor, and functions as power for taking in the paper 11 from the outside of the printer main body 2.

  The stand 6 is provided with a paper roll body 10 in which the paper 11 to be supplied to the printer main body 2 is rolled. The stand 6 is provided to stabilize the position of the paper roll body 10 so that the paper 11 is smoothly transported toward the transport guide 3.

  A groove that functions as a bearing is formed in the stand 6, and the shaft 8 inserted through the core hole of the paper roll body 10 is supported by the groove. The shaft 8 functions as a rotation axis of the paper roll body 10 and is formed narrower than the core hole of the paper roll body 10. A support tool 9 is fitted into the open end of the core hole of the paper roll body 10, and the shaft 8 is inserted into the support tool 9 so that the paper roll body 10 and the shaft 8 are generally fixed by the support tool 9. Configured to be.

  FIG. 1B is a schematic view of the printer 1 as viewed from above. As shown in FIG. 1B, the paper roll body 10 is fixed to the shaft 8 via a support 9 fitted to both ends of the core hole, and supported by the stand 6 on both sides of the open end of the shaft 8. Is done. It should be noted that the two locations where the paper roll body 10 is supported by the stand 6 are not different and have almost the same configuration.

  In the printer 1, the transport roller 5 rotates and the paper 11 is sent out from the roll paper 10. The conveyance guide 3 guides the paper 11 to the printing unit 4. The printing unit 4 prints on paper by computer control.

  A mode in which printing is performed on the paper 11 by the printer 1 will be described based on the configuration described so far. As described above, the paper roll body 10 that is the supply source of the paper 11 is mounted on the stand 6 via the support 9 and the shaft 8. The paper 11 pulled out from the paper roll body 10 mounted on the stand 6 is guided by the transport guide 3 and reaches the printing unit 4 and the transport roller 5. When the printing unit 4 performs printing, the conveyance roller 5 rotates in conjunction with this, whereby the paper 11 is drawn from the paper roll body 10 and supplied into the printer main body 2. The paper 11 printed by the printing unit 4 is discharged to the front of the printer main body 2 (left side in FIG. 1).

  Next, the shape of the support 9 of the present invention will be described with reference to FIGS. 2, 3, and 4. FIG. 2 is a perspective view for explaining the shape of the support 9.

  The support 9 is formed by integrating two layers of an ellipse layer 21 and a perfect circle layer 22. The ellipse layer 21 is formed as a column having an approximately ellipse as the bottom. The perfect circle layer 22 is formed as a column having a substantially circular bottom. In addition, as a material of the support tool 9, it can select arbitrarily from a synthetic resin, a metal, etc. A central hole 25 penetrating both layers is formed at the center of the bottom of the integrally formed elliptical layer 21 and perfect circle layer 22. The center hole 25 is a hole for inserting the shaft 8 described above, and is adjusted to be slightly larger than the diameter of the shaft 8.

  When the support tool 9 is attached to the shaft 8 (in other words, when the support tool 9 is fitted to the paper roll body 10), the perfect circle layer 22 is outside (the open end side of the shaft 8), and the elliptical layer 21 is The inner side (the side that fits into the core hole of the paper roll body 10) is used.

  When the support tool 9 is attached to the shaft 8 (in other words, when the support tool 9 is fitted to the paper roll body 10), the support tool 9 is fitted from the elliptical layer 21 side toward the core hole of the roll paper.

  In the paper roll body 10, particularly a coreless material called coreless without using a core material, the core hole may be deformed by an external force, but in the support 9, the deformed core hole is a perfect circle layer. Even if it does not fit in 22, the paper roll body 10 can be supported by fitting the elliptical layer 21 into the core hole.

  When the core hole is deformed, it is necessary to discard the paper roll body 10 or to perform printing with only the shaft 8 inserted without a support. However, if the deformed paper roll body 10 is supported only by the shaft 8, the pulling of the paper 11 by the power of the transport roller 5 becomes uneven, and as a result, the printing by the printing unit 4 becomes defective. With the support 9 according to the present invention, even if the paper roll body 10 has a deformed core hole, the posture can be stabilized to some extent and used for printing. Therefore, the printing in the printer 1 can be stabilized.

  As described above, the support 9 supports the deformed paper roll body 10 by the elliptical layer 21, while supporting the paper roll body 10 whose core hole is not deformed by the perfect circular layer 22. it can. That is, there is no need to replace with another component depending on whether or not the paper roll body 10 is deformed, which is convenient.

  FIG. 3A is a diagram showing the support 9 inserted through the shaft 8 as viewed from the direction indicated by the arrow A in FIG. 2, and the support 9 as viewed in the major axis (longest diameter) direction of the elliptical layer 21. Represents the appearance of the side. On the other hand, FIG. 3 (b) is a diagram showing a state seen from the direction indicated by arrow B in FIG. .

  As best shown in FIG. 3A, the longest diameter of the elliptical layer 21 is substantially equal to the diameter of the perfect circular layer 22. As described above, since the support 9 is fitted into the core hole of the paper roll body 10 from the elliptical layer 21, the elliptical layer 21 may cause the perfect circle layer 22 to reach the core hole of the paper roll body 10. I can't interfere. According to the said structure, what is necessary is just to change the degree of fitting (insertion) of the support tool 9 with the presence or absence of a deformation | transformation of the paper roll body 10, and the paper roll body 10 can be mounted easily.

  FIG. 4 is a diagram illustrating the support 9 viewed from the direction indicated by the arrow C in FIG. As shown in FIG. 4, the elliptical layer 21 and the perfect circle layer 22 have a center hole 25 having the same center.

  Although the diameter of the center hole 25 is described as being slightly larger than the diameter of the shaft 8, it may be adjusted to be the same as or slightly smaller than the diameter of the shaft 8. In the former case, the support and the paper roll body 10 are separated from the shaft 8 and rotate. In the latter case, the support 9 and the shaft 8 rotate together. In any case, since the posture of the paper roll body 10 is stabilized to some extent by the support 9, the supply of the paper 11 to the printer 1 can be stabilized.

  In addition, according to the experiment conducted by the inventors, it was found that the ratio of the minor axis to the major axis of the elliptical layer 21 of the support 9 is preferably 0.6 or more, and preferably 0.8. If the minor axis of the elliptical layer 21 is extremely small with respect to the major axis, the vertical movement of the paper roll body 10 at the time of rotation becomes large, and the conveyance of the paper 11 becomes unstable.

  As described above, when the support tool 9 of the present invention is used, the paper roll body deformed by the elliptical layer 21 while having the function of supporting the core hole of the normal paper roll body 10 by the perfect circle layer 22. Even 10 can be favorably supported. Accordingly, the printer 1 can stably draw the paper 11 from the paper roll body 10, and can suppress the occurrence of printing defects such as unevenness.

  Up to this point, the support 9 has been described as the roll paper support of the present invention, but the embodiment of the roll paper support of the present invention is not limited to this, and changes are made within the scope of the present invention. Needless to say, you can.

  For example, it is described that the support 9 fixes the position with respect to the printer 1 by inserting the shaft 8 supported by a part (stand 6) of the printer 1 and supports the rotation of the paper roll body 10. However, as the roll paper support of the present invention, for example, the roll paper support fixed to the rotatable portion of the vertical surface rotates together with the rotatable portion as the roll paper rotates. You may do.

  Further, the thickness of the elliptical layer 21 and the perfect circle layer 22 in the support 9 can be arbitrarily determined, but the area where the center hole 25 is in contact with the shaft 8 and the side wall of the elliptical layer 21 or the perfect circle layer 22 are paper rolls. The sheet roll body 10 can be stably supported when the area of the body 10 in contact with the core hole is large to some extent.

  Further, in the description of the embodiment, the support tool 9 in which the perfect circle layer 22 and the elliptical layer 21 are integrally formed has been described. However, a support tool including only the elliptical layer 21 may be used. In this case, since the shape is simplified, it can be provided at a low cost as a support for the deformed paper roll body 10.

  In the description of the embodiments, the deformation of the coreless paper roll body 10 is mainly referred to, but the paper roll body 10 having a core material is not changed. Even if there is a core material, the core material may be deformed by external stress. In this case, the support 9 of the present invention is fitted to the deformed core material to support the paper roll body 10. Because it can.

  The paper roll body 10 can be selected from various types such as plain paper, thermal roll paper, and label roll paper according to the application of the printer 1 and the printing method of the printing unit 4.

DESCRIPTION OF SYMBOLS 1 Printer 2 Printer main body 3 Conveyance guide 4 Printing unit 5 Roller 6 Stand 8 Shaft 9 Support tool (support tool for roll paper)
10 Paper roll (roll paper)
11 Paper 21 Elliptic layer 22 Round layer 25 Center hole

Claims (2)

In the roll paper support that stabilizes the rotation axis of the roll paper by being attached to the printer in a state of being fitted into the core hole of the roll paper,
A columnar first fitting portion having a substantially elliptical shape at the bottom,
A roll paper support, wherein the first fitting portion is inserted from the bottom toward the back of the core hole of the roll paper so as to be fitted into the core hole of the roll paper. A substantially cylindrical second fitting portion having the same central axis as the first fitting portion;
The roll paper support according to claim 1, wherein the second fitting portion and the first fitting portion are integrally formed.

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