JP2006225136A - Shaft fixing tool for coreless roll paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a core of roll paper used in a plotter and a large printer by providing a shaft fixing tool for the coreless roll paper which prevents wrinkles and break on the inner periphery of the coreless roll paper even when the coreless roll paper is replaced many times, to save resources. <P>SOLUTION: This shaft fixing tool to fix coreless roll paper 2 to a shaft 1 for filling roll paper of a plotter and large printer is provided with a fixation flange 10 fixed in the vicinity of one end part of the shaft 1 and equipped with a tapered pipe 11 of which outer periphery contacts an inner peripheral part in one side of the coreless roll paper 2, and with a movable sleeve 20 slidably provided in the vicinity of the other end part of the shaft 1 and equipped with a tapered pipe 21 of which outer periphery contacts an inner peripheral part in the other side of the coreless roll paper 2. The coreless roll paper 2 is fixed to the shaft 1 by inserting the coreless roll paper 2 into the tapered pipe 11 of the fixation flange 10 and then inserting the movable sleeve 20 into the shaft 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shaft fixture for setting coreless roll paper on a plotter or large printer when using coreless roll paper instead of cored roll paper used in a plotter or large printer.

  Plotters and large printers that print drafting drawings, architectural drawings, advertising banners, etc. can be printed on A3-A0 size or larger sheets or fabrics. In order to make the size of the printer compact, there are many that use roll paper to print by an ink jet printing method or a laser printing method. In this case, a roll paper having a core in which a paper is wound around a cylindrical core is used.

  The roll paper with a core used in these plotters and large printers is one in which the roll paper is passed through one shaft and the core of the roll paper is held by flanges provided at both ends of the shaft (for example, Patent Documents 1 to 3) and engaging parts provided on both holding parts, and both ends of the core of the roll paper are engaged between the engaging parts (for example, refer to Patent Document 4). .

  When the roll paper with the core is used up, the core remains as unnecessary garbage. As a material of the core, in the case of disposable, a paper tube (hereinafter referred to as “paper tube”) is used in consideration of environmental pollution after disposal, but in the A0 version, it is 841 mm, 36 type. The 914 mm and 60 type have a length of 1524 mm, and a design office or the like accumulates a number of them and is troubled by treatment. Unlike newspaper and magazine paper, paper tubes cannot be recycled, are wasteful of resources, and can only be incinerated, so there is also a problem of global warming.

  By the way, as a small printer paper, there is a receipt printing paper in a register or a receiving paper of a household facsimile in which a coreless roll paper is used so as to eliminate waste of resources (for example, see Patent Documents 5 and 6). ).

  Since the coreless roll paper used in such a small printer is lightweight, it can be stored in a storage section having a concave holding plate for receiving the roll paper, and if the paper leading mechanism is used to pull the leading edge of the paper, Following this, the roll paper is idled with respect to the holding plate, and the paper is unwound.

JP-A-7-232497 Japanese Patent Laid-Open No. 7-257092 JP-A-11-79481 JP-A-8-238826 Japanese Patent Laid-Open No. 10-329995 JP 2001-139192 A

  The aim of the present invention is to save resources by making the roll paper of plotters and large printers coreless, but this has the following problems to be solved.

  In other words, since the coreless roll paper is light in a small printer, even if it is held by a holding plate provided in the roll paper storage section, no particular problem occurs. Also, normal coreless roll paper is used until the paper is used up, and the type of paper is not changed halfway, so that the inner peripheral paper is less likely to be damaged.

  However, roll paper used in plotters and large printers is long and heavy, so when receiving coreless roll paper with a concave holding plate as disclosed in Patent Documents 5 and 6, Friction with the surface of the coreless roll paper is large, the load of the paper transport mechanism is large, and an excessive force is applied to the paper, causing tears and paper jams.

  When the coreless roll paper is used through a shaft for roll paper with a core of an existing plotter or large-sized printer, the inner peripheral paper of the coreless roll paper does not have the strength of the inner circumference of the paper tube and is easily broken. That is, a shaft for roll paper with a core of an existing plotter or large printer has a fixed-side receiving portion for mounting one end of a paper tube, which is a core of the roll paper, at one end of the shaft. A movable side receiving portion for mounting the other end portion of the paper tube can be mounted from the other end side of the shaft. These fixed side receiving part and movable side receiving part are parallel to the shaft and have a U-shaped cross section, and are received at 3 to 4 locations on the inner periphery of the paper tube. If the inner periphery of the coreless roll paper is attached here, a partial tension is applied to the inner periphery of the coreless roll paper, and the coreless roll paper is easily torn.

  There are various types of roll paper for plotters and large printers, such as plain paper, tracing paper, coated paper, recycled paper, and film paper. For this reason, when changing the type of paper, it is necessary to remove the roll paper used immediately before from the shaft and use the roll paper used this time after being attached to the shaft. If the coreless roll paper is repeatedly attached to or removed from the shaft, the coreless roll paper will be wrinkled or torn on the inner periphery, increasing the number of parts that cannot be used and wasted.

  Therefore, the present invention eliminates the problems when using coreless roll paper for plotters and large printers, and fixes the shaft of coreless roll paper that does not easily wrinkle or break the inner circumference of the coreless roll paper no matter how many times it is replaced. The purpose is to provide ingredients.

In order to solve the above-mentioned problem, a first configuration of the present invention is a shaft fixing tool for fixing a coreless roll paper to a roll paper loading shaft of a plotter or a large printer, in the vicinity of one end of the shaft A fixed flange with a taper having a substantially circular outer periphery, the outer periphery of which is in contact with one inner peripheral portion of the coreless roll paper, and slidable near the other end of the shaft, A shaft fixing tool for coreless roll paper, characterized in that a taper movable sleeve having an outer periphery whose outer periphery is in contact with the other inner peripheral portion of the coreless roll paper and has a substantially circular outer section is provided.
In this first configuration, when the coreless roll paper is fixed to the shaft, the movable sleeve is removed from the shaft, and the original coreless roll paper is pulled out from the taper portion of the fixed flange and removed. Thereafter, the coreless roll paper used this time is inserted into the taper portion of the fixed flange so that the end surface of the coreless roll paper abuts against the flange surface of the fixed flange. Next, the movable sleeve is inserted into the shaft so that the taper on the outer periphery of the movable sleeve is in contact with the inner periphery of the coreless roll paper. When the coreless roll paper is fixed, set the shaft on the shaft receiving part of the plotter or large printer. As described above, the shaft is provided with the fixed flange and the movable sleeve, and the inner periphery of the coreless roll paper is supported by the taper portion having the outer periphery having a substantially circular cross section. It is hard to break. Therefore, it is possible to save resources by making the roll paper of the plotter and large printer, which is the original aim of the present invention, coreless.

The second configuration of the present invention is a shaft fixing tool for fixing coreless roll paper to a roll paper loading shaft of a plotter or a large printer, which can be inserted from one or both of the shafts, and has a longitudinal length thereof. A support tube made of an elastic material having a C-shaped cross section having a slit along the direction and an expandable elastic material, and a diameter expansion sleeve that can be inserted from one of the shafts and expand the diameter of the support tube. The shaft fixing tool for coreless roll paper.
In this second configuration, when the coreless roll paper is fixed to the shaft, if the diameter-expanding sleeve is removed from the shaft, the diameter of the support tube that has been expanded by the diameter-expanding sleeve is reduced so that the original coreless roll The paper can be pulled out of the support tube and removed. After that, insert the coreless roll paper used this time into the support tube, and install the diameter expansion sleeve on the shaft to expand the diameter of the support tube. The support tube is pressed against the inner periphery of the coreless roll paper, and the coreless roll paper is supported. It will be fixed to the shaft via a tube. In this way, by providing the shaft with the support tube and the diameter-enlarging sleeve and supporting the inner periphery of the coreless roll paper with the expanded support tube, wrinkles and tears are less likely to occur on the inner periphery of the coreless roll paper. Therefore, it is possible to save resources by making the roll paper of the plotter and large printer, which is the original aim of the present invention, coreless.

  According to the present invention, it is possible to provide a shaft fixing tool for a coreless roll paper that is less likely to be wrinkled or torn on the inner periphery of the coreless roll paper, regardless of how many times it is replaced. Can save resources.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Embodiment 1]
FIG. 1 is a partially cutaway cross-sectional view showing the structure of a shaft fixture according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  In these drawings, the shaft fixing tool is fixed in the vicinity of one end of a roll paper loading shaft (hereinafter simply referred to as “shaft”) 1 of a plotter or printer, and the outer periphery is one inner periphery of the coreless roll paper 2. A tapered fixed flange 10 having an outer periphery with a substantially circular cross section in contact with the portion, and slidably provided in the vicinity of the other end of the shaft 1, and the outer periphery is in contact with the other inner peripheral portion of the coreless roll paper 2. A tapered movable sleeve 20 having a substantially circular outer periphery in section is provided.

  The fixed flange 10 has a taper tube 11 so that it can be mounted even if the inner diameter of the coreless roll paper 2 is somewhat varied, and the inner side of the C-shaped cross section so that it can be mounted even if the outer diameter of the shaft 1 varies somewhat. It has a tube 12. The taper tube 11 also has a C-shaped cross section having a substantially circular outer periphery no matter where the cross section is taken, and is connected by the inner tube 12 and the rib 13. Therefore, the outer diameter of the taper tube 11 changes so as to match the inner diameter of the coreless roll paper 2. A flange portion 14 that receives the end portion of the coreless roll paper 2 is integrally coupled to the end portion of the inner tube 12, and is fixed to the shaft 1 at one or several places with a fixing tool 15 such as a cap nut. It can be done.

  Similar to the fixed flange 10, the movable sleeve 20 also has a taper tube 21 so that it can be mounted even if the inner diameter of the coreless roll paper 2 varies somewhat, and can be mounted even if the outer diameter of the shaft 1 varies somewhat. Has an inner tube 22 having a C-shaped cross section. The taper tube 21 also has a C-shaped cross section having a substantially circular outer periphery no matter where the cross section is taken, and is connected to the inner tube 22 by a rib (not shown). Accordingly, the outer diameter of the taper tube 21 changes so as to match the inner diameter of the coreless roll paper 2. A flange portion 23 for receiving the end portion of the coreless roll paper 2 is integrally coupled to the end portion of the inner tube 22, and is fixed to the shaft 1 at one or several places with a fixing tool 24 such as a cap nut. It can be done. If the movable sleeve 20 stops at an arbitrary position by the frictional force between the shaft 1 and the inner tube 22, the flange portion 23 may not be provided.

  In the first embodiment, when the coreless roll paper 2 is fixed to the shaft 1, the movable sleeve 20 is removed from the shaft 1, and the original coreless roll paper is pulled out from the taper tube 11 of the fixed flange 10 and removed. Thereafter, the coreless roll paper 2 used this time is inserted into the taper tube 11 of the fixed flange 10 so that the end surface of the coreless roll paper 2 abuts against the surface of the flange portion 14 of the fixed flange 10. Next, the movable sleeve 20 is inserted into the shaft 1 so that the outer periphery of the movable sleeve 20 is in contact with the inner periphery of the coreless roll paper 2. When the coreless roll paper 2 is fixed, the shaft 1 is set on a shaft receiving portion of a plotter or a large printer. In the present embodiment, small-diameter portions 1a and 1b are provided at both ends of the shaft, and the shaft can be rotatably set by being attached to a pair of shaft receiving portions of a plotter or a large printer.

  As described above, the fixed flange 10 and the movable sleeve 20 are attached to the shaft 1, and the inner periphery of the coreless roll paper 2 is supported by the taper tubes 11 and 21, so that the inner periphery of the coreless roll paper 2 is wrinkled or torn. Is less likely to occur.

  In the first embodiment, the fixed flange 10 having the above-described configuration is attached to the shaft 1, but the core-attached roll paper end portion formed on the shaft attached to the existing plotter or large printer A taper tube that wraps the outer periphery of the taper portion of the fixed side receiving portion from the outside can be provided by using the fixed side receiving portion to receive, and as a result, the configuration of FIG. 1 can be obtained.

[Embodiment 2]
FIG. 3 is a partially cutaway front view showing the structure of the shaft fixture according to Embodiment 2 of the present invention, and FIG. 4 is an exploded perspective view of the partially cutout.

  In this embodiment, the shaft fixture includes a support tube 30 made of an elastic material such as a paper tube or a plastic tube having a smaller outer diameter than the inner peripheral part of the coreless roll paper 2 and having a C-shaped cross section. The diameter-expanding sleeve 31 has an inner diameter slightly larger than the outer diameter of the shaft 1 and an outer diameter slightly smaller than the inner diameter of the support tube 30. The tip 31a of the diameter-expanding sleeve 31 has a wedge-like diameter and is provided with a protrusion 32 along the longitudinal direction. The protrusion 32 has a narrow tip end and a wide base end so as to spread the slit 30a when entering the slit 30a of the support tube 30, and also widens the slit 30a. It is wavy so that the resistance is sometimes reduced. Further, the height of the ridge 32 is set so as not to be higher than the thickness of the support tube 30 so that the inner peripheral paper of the coreless roll paper 2 is not damaged when the diameter-expansion sleeve 31 is inserted into the support tube 30. ing.

  In the second embodiment, when the coreless roll paper 2 is fixed to the shaft 1, if the diameter-expanding sleeve 31 is removed from the shaft 1, the diameter of the support tube 30 that has been expanded by the diameter-expanding sleeve 31 is reduced. Then, the original coreless roll paper 2 can be pulled out from the support tube 30 and removed. Thereafter, the coreless roll paper 2 used this time is inserted into the support tube 30, the support tube 30 is pressed against the flange 3 with the tapered portion 3 a attached to one end of the shaft 1, and the diameter-enlarging sleeve 31 is placed on the shaft 1. When the diameter of the support tube 30 is increased by mounting, the support tube 30 is pressed against the inner periphery of the coreless roll paper 2, and the coreless roll paper 2 is fixed to the shaft 1 via the support tube 30.

  In addition to expanding the slit 30 a by the wedge-shaped side portion of the protrusion 32, the outer diameter of the diameter-expanding sleeve 31 is gradually increased, and the diameter of the support tube 30 is increased by the diameter-expanding sleeve 31. You can also. In that case, a protrusion along the longitudinal direction is provided on the outer periphery of the diameter-enlarged sleeve 31 so that friction does not increase between the outer periphery of the diameter-enlarged sleeve 31 and the inner periphery of the support tube 30, or the entire surface is uneven. It may be provided.

  In the second embodiment, an example in which the diameter-expanding sleeve 31 is inserted from one side of the support tube 30 has been shown. However, by preparing two diameter-expansion sleeves 31 and inserting them from both the support tubes 30, the support tube 30 is provided. Can be expanded.

  In this way, the shaft 1 is provided with the support tube 30 and the diameter-expanding sleeve 31, and the inner periphery of the coreless roll paper 2 is supported by the expanded diameter support tube 30, thereby causing wrinkles and tears on the inner periphery of the coreless roll paper 2. Is less likely to occur.

  The present invention can be used in a plotter or a large printer as a shaft fixing tool for coreless roll paper that is less likely to be wrinkled or torn on the inner periphery of the coreless roll paper, no matter how many times it is replaced.

It is a partially cutaway sectional view showing the structure of the shaft fixture according to Embodiment 1 of the present invention. It is sectional drawing in the AA of FIG. It is a partially notched front view which shows the structure of the shaft fixing tool which concerns on Embodiment 2 of this invention. It is a partially cutaway exploded perspective view of a shaft fixture according to Embodiment 2 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft 1a, 1b Small diameter part 2 Coreless roll paper 3 Flange 3a Tapered part 10 Fixed flange 11 Tapered pipe 12 Inner pipe 13 Rib 14 Flange part 15 Fixing tool 20 Movable sleeve 21 Taper pipe 22 Inner pipe 23 Flange part 24 Fixing tool 30 Support Pipe 30a Slit 31 Expanding sleeve 31a Tip 32 Projection

Claims (2)

A shaft fixing tool for fixing coreless roll paper to a roll paper loading shaft of a plotter or large printer,
A tapered fixed flange having an outer periphery with a substantially circular cross section, the outer periphery being fixed in the vicinity of one end of the shaft and the outer periphery being in contact with one inner peripheral portion of the coreless roll paper;
A taper movable sleeve having a substantially circular outer periphery having a substantially circular cross section, which is slidably provided near the other end of the shaft, and whose outer periphery is in contact with the other inner peripheral portion of the coreless roll paper. A coreless roll paper shaft fixture. A shaft fixing tool for fixing coreless roll paper to a roll paper loading shaft of a plotter or large printer,
A support tube made of an elastic material that can be inserted from one or both of the shafts and that has a slit in the longitudinal direction and has a C-shaped cross section;
A coreless roll paper shaft fixing tool, comprising: a diameter-expanding sleeve that is insertable from one of the shafts and expands the diameter of the support tube.

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