JP4184642B2 - Roll paper holding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roll paper holding device that can be mounted on an image forming apparatus having a paper feeding mechanism such as a copying machine, a printer, and a facsimile.
[0002]
[Prior art]
In an image forming apparatus such as a copying machine, a printer, or a facsimile, roll paper is used as transfer paper for transferring an image, and cutting to an arbitrary length according to the size of the original is disclosed in, for example, Japanese Patent Laid-Open No. 2000-289895. Proposed. In this conventional technology, a plurality of roll papers such as a normal paper roll and a paper roll such as tracing paper can be mounted, and the operator can select a paper having a width corresponding to the paper type and the document size. By selecting, the selected paper is sent to the image transfer unit. Further, this prior art discloses that flange members are attached to both ends of the roll paper in the axial direction, and support means for rotatably supporting the flange members is provided. With this configuration, the roll paper can be set with a simple structure.
[0003]
On the other hand, in the prior art, as shown in FIG. 12A, a support cylindrical portion 15 inserted into the paper tube 1 a that is the core of the roll paper 1 is provided at the center portion of the flange portion 14 of the flange member 13. In addition, an example in which a joint portion between the support cylindrical portion 15 and the flange portion 14 is formed in a step portion 18 having a slightly larger diameter than the support cylindrical portion 15 is disclosed. This is because the paper tube 1a has a stable shape in order to allow the roll paper 1 to be used to some extent with respect to the roll paper 1 in which the side surface of the roll paper 1 is not cut evenly or has absorbed moisture. This is to determine the position in the vicinity.
[0004]
Therefore, in the normal case where the end faces are cut and aligned neatly, a space is created between the end face of the roll paper 1 and the flange portion 14 as shown in FIG. Therefore, as shown in FIG. 12 (b), the management and the process are poor, the end face of the roll paper 1 is uneven, or the storage state is badly absorbed as shown in FIG. 12 (c). Even when the end portion is extended, by providing the step 18 described above, the flange member 13 comes into contact with the vicinity of the paper tube 1a that is least susceptible to variations and deformation, so that the roll paper 1 can be properly attached.
[0005]
[Problems to be solved by the invention]
However, in the actual use situation, there are few cases where the roll paper 1 having the above-described problems is used. Rather, although the normal roll paper is used, the step 18 provided for the above countermeasure is used. There may be concerns about the impact of. That is, when the roll of the roll paper 1 on which the flange member 13 is set is loosened, the roll may be shifted to the left and right, and may be shifted to the full gap generated by the step 18.
[0006]
The above-described holding mechanism using the flange type is easy to handle, and the number of cases in which the holding mechanism is stored upright while being attached to the roll paper 1 is not increased. However, as shown in FIG. 13A, when the roll paper 1 is stored vertically with the flange member 13 attached, the lower surface of the roll paper 1 has nothing to receive except for the step portion 18, and FIG. As shown in (b), there is a tendency to hang down by its own weight. In this case, the winding gradually collapses from the vicinity of the outer peripheral portion, and the gap generated by the step 18 may be filled with the winding deviation as shown in FIG. In this case, it is necessary to remove the flange member 13 and return the winding deviation.
[0007]
The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a roll paper holding device capable of preventing the collapse that occurs in holding the flange type roll paper.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the first means comprises a protrusion that fits into a hole in the center of the roll paper and a disk-like flange member, and is provided between the inner surface of the flange member and the end surface of the roll paper. In the roll paper holding device that holds both ends of the roll paper so that a predetermined gap is formed, a spacer member that is detachably inserted into the gap is provided.
[0009]
The second means is characterized in that, in the first means, the spacer member protrudes outward so as to prevent rotation of the flange member when inserted into the gap.
[0010]
The third means is characterized in that, in the first or second means, a handle portion is provided on the spacer member.
[0011]
According to a fourth means, in the first to third means, the spacer member is provided with a scale indicating a remaining amount corresponding to the outer diameter of the roll paper.
[0012]
A fifth means is characterized in that, in the first to fourth means, the spacer member is provided with a stopper for pressing a part of the outer peripheral surface of the roll paper.
[0014]
In addition, according to the 1st means, since the spacer member inserted detachably in a gap | interval is provided, the winding shift | offset | difference after setting to the flange member of roll paper can be prevented.
[0015]
According to the second means, if the spacer member remains attached, the rotation of the flange member is prevented and cannot be set in an image forming apparatus such as a copying machine, so that an erroneous operation can be prevented.
[0016]
According to the third means, since the handle portion is provided, the portability can be improved.
[0017]
According to the fourth means, it is possible to easily grasp the remaining amount, and it is easy to grasp the remaining amount necessary for the work even when using the roll paper that has been used.
[0018]
According to the fifth means, since the stopper is provided, it is possible to prevent the roll paper from being loosened together with the winding deviation, and it is possible to store the used roll paper in a state where no looseness occurs. .
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in the prior art mentioned above and each following embodiment, each part which can be considered equivalent is attached | subjected the same reference number, and the overlapping description is abbreviate | omitted suitably.
[0021]
First, a first embodiment will be described with reference to FIGS. FIG. 1 is a schematic structural diagram of a copying machine main body equipped with a roll paper holding device according to the present invention. Although not shown, the copying machine main body is provided with a drawer-type paper feed tray, and the roll paper 1 can be set from the top or front (left side in FIG. 1) with the paper feed tray pulled out. It is like that. Each roll paper 1 is pulled out by the feed roller pair 2 and conveyed to the image transfer unit 5. The transport path of each roll paper 1 is joined before the paper cutter 3. Each roll paper 1 is cut into a predetermined length required for image formation.
[0022]
The roll paper 1 that has passed through the paper cutter 3 is synchronized with the image forming timing by the registration roller 4, and after the toner is transferred by the image transfer unit 5, it is thermally fixed by the fixing unit 6, and is taken out of the machine. Discharged. On the other hand, in the document reading section 7, a document of an image to be transferred is conveyed, the image information is read, and the photosensitive member 5a of the image transfer section 5 is exposed based on the read image information.
[0023]
The roll paper 1 is set in the roll paper setting unit. This roll paper setting unit will be described with reference to FIGS. 2 is an exploded perspective view showing the roll paper setting unit in an exploded manner, and FIG. 3 is a side view schematically showing a state in which the roll paper is set in the roll paper setting unit. A bottom plate 9 on which the cradle 8 is placed is provided on the bottom surface of the roll set unit. The bottom plate 9 is provided with a plurality of fitting holes 11 into which boss portions 10 provided on the lower surface of the cradle 8 can be fitted. This is because the standard size of the roll paper 1 can be supported. Further, the bottom plate 9 is made of metal or the like to be attracted to the magnet 12 (see FIG. 3) attached to the back surface of the cradle 8. Accordingly, the cradle 8 can be fixed to the bottom plate 9 by fitting the boss portion 10 into the fitting hole 11.
[0024]
On the other hand, the flange member 13 is fitted to the roll paper 1 from both axial ends. Each flange member 13 includes a flange portion 14 and a support cylindrical portion 15 that is inserted into and fixed to the paper tube 1 a that is the core of the roll paper 1. A stepped portion 18 is formed at the base of the supporting cylindrical portion 15 by making the cylindrical portion having a size near the diameter of the paper tube 1a into a convex shape. The height of the step portion 18 is generally about 5 mm, and is provided to cope with the problem of the roll paper 1 as described in the above-described prior art.
[0025]
When the roll paper 1 is set, the flange portion 14 of the flange member 13 on one side (left side in FIG. 2) is sandwiched by the position restricting member 16 provided in the sheet feeding portion, and fluctuations in the lateral position can be suppressed. The position regulating member 16 can be fixed at an appropriate position in the unit. Inside the cradle 8, two rollers 17 are arranged side by side so as to be freely rotatable, and by receiving the flange portion 14 with these rollers 17, the roll paper 1 is configured to be freely rotated.
[0026]
In the first embodiment, as shown in FIGS. 4 to 7, a spacer having substantially the same thickness as the gap is formed in the gap formed by the step portion 18 between the flange portion 14 of the flange member 13 and the roll paper 1. The member 19 is inserted in advance. The spacer member 19 eliminates room for the roll paper 1 to collapse and is removed during use, so that a good storage state is always maintained. FIG. 4 is a plan view showing a state in which the roll paper is mounted on the flange of the roll paper setting unit and a spacer member mounted between the flange and the roll paper, and FIG. 5 is a diagram in which the spacer member is mounted between the flange and the roll paper. FIG. 6 is a perspective view showing only the spacer member, and FIG. 7 is a side view schematically showing a state in which the roll paper is conveyed with the spacer member attached.
[0027]
As shown in detail in FIG. 6, the spacer member 19 is roughly composed of a spacer portion 20, a lock lever 21, and a handle portion 24. The spacer portion 20 has a thickness t that is substantially the same as the gap generated by the step portion 18, and an inner peripheral surface thereof has an arc shape, and the outer periphery of the step portion 18 is combined with the lock lever 21. It comes to hold. A taper 21a is formed at the tip of the arc-shaped portion on the inner peripheral surface of the spacer portion 20 so as to be easily inserted. The lock lever 21 can be rotated about the fulcrum 23, and the free end side is pressed toward the spacer portion 20 by the lock spring 22. As for the shape of the lock lever 22, like the spacer portion 20, the inner peripheral surface thereof has an arc shape, and a taper 22a is formed at the tip of the arc-shaped portion. Thus, the lock lever 22 pressurizes and holds the outer periphery of the step portion 18 by the pressure applied by the lock spring 22. A protrusion 29 is integrally formed in the vicinity of the fulcrum 23 of the lock lever 22, and this protrusion 29 becomes a lever at the time of release, and when removing, the protrusion 29 is pulled to open the lock lever 21. By this operation, the spacer member 19 can be easily attached and detached without removing the flange member 13 attached to the roll paper 1. Further, even when the leading end of the roll paper 1 is set on the feed roller 2 and the roll paper 1 is to be conveyed while the spacer member 19 is mistakenly attached, the handle 24 rotates clockwise in FIG. 9 interferes with the edge of X at X and paper feeding is not performed, so that the operator easily notices that it is erroneously set, that is, the paper is transported without removing the spacer member 19. .
[0028]
The handle portion 24 is provided with a through-hole 27 that is large enough to allow a hand to pass through, so that the operator can put his / her hand into the through-hole 27 as indicated by the arrow line indicated by * in FIG. It has become. Thereby, the roll paper 1 can be easily lifted and conveyed. In addition, a sheet presser 25 can be moved in the normal direction of the roll paper 1 with a long hole 24 a provided in the handle part 24 as a guide at a portion facing the fulcrum 23 of the handle part 24. One end of the sheet presser 25 protrudes from the long hole 24a, and the outer peripheral surface of the roll paper 1 can be pressed by a pressure force of a pressure spring 26 inserted into the long hole 24a as will be described later. ing. A scale 28 indicating the remaining amount of the roll paper 1 is provided on the handle portion 24 at the side edge in the longitudinal direction of the long hole 24 a, and the remaining amount of the roll paper 1 is read according to the position of the paper presser 25. Be able to. Therefore, a protrusion 25 a is formed on the side of the paper presser 25 on the scale 28 side.
[0029]
On the other hand, the paper presser 25 can prevent loose winding of the roll paper 1. This will be described with reference to FIGS. FIG. 8 is a side view for explaining a state in which the roll paper is loosened and loosened, and FIG. 9 is a view for explaining a state in which the roll is suppressed by the spacer member. The state in which the roll of the roll paper 1 is loosened and loosened as shown in FIG. 8 is often caused by the removal of the fixing member 31 that fixes the winding end of the paper such as tape. In such a case, even if the winding is not misaligned, it is necessary to rewind at the time of setting, which causes a problem. However, when the spacer member 19 is attached, the paper presser 25 restrains the winding end of the paper as shown in FIG. It is effective. As described above, since the paper presser 25 serving as a stopper is provided so that the roll of the roll paper 1 does not loosen even if the fixing member 31 is detached, the roll paper 1 can be prevented from loosening along with the winding deviation. The used roll paper can be stored without any looseness.
[0030]
Furthermore, as shown in FIG. 10, the approximate remaining amount of the roll paper 1 can be known from the paper presser 5 and the scale 28. FIG. 10 is an enlarged partial side view showing the paper pressing portion of the spacer member. As is apparent from this figure, the sheet presser 25 restrains the outer periphery of the roll paper 1 in a state where the spacer member 19 is attached. Since one end of the sheet presser 25 is provided with a projection 25a serving as an index for reading the scale 28, the approximate remaining amount of the roll paper 1 can be known by reading the value of the scale 28 corresponding to this. it can. In this way, the remaining amount of the roll paper 1 can be easily grasped, and even when using a roll paper that is already in use, it is easy to grasp the remaining amount necessary for the work, and it is possible to prevent running out of paper.
[0031]
Next, a second embodiment of the present invention will be described with reference to FIG. FIGS. 11A and 11B are views showing a second embodiment of the roll holding device of the present invention, in which FIG. 11A is a perspective view showing the flange, and FIG. 11B is a partial side view showing a state where the roll is mounted on roll paper. This second embodiment is an example of correcting the roll deviation of the roll paper more easily. That is, at least one modified elongated hole 41 extending in the outer peripheral direction is provided in the flange portion 14 of the flange member 13. As shown in FIG. 11 (b), by allowing the operator to insert a hand (finger) through the corrected elongated hole 41, the winding displacement of the portion normally hidden in the flange portion 14 can be easily corrected. Can do. If the spacer member 19 described in the first embodiment is inserted into the stepped portion 18 of the flange member 13 after correcting the winding deviation in this manner, the spacer member 19 loosens due to the winding deviation when the spacer member 19 is inserted. It is possible to prevent the sheet from entering the gap between the flange member 13 and the end of the roll paper 1.
[0032]
【The invention's effect】
As described above, according to the present invention, since the spacer member is detachably inserted in the gap between the side edge of the roll paper and the opposing surface of the flange member, the winding deviation after the flange member is set on the roll paper. The roll paper can be attached and detached without removing the flange member, and the operability can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic structural diagram of a copying machine main body equipped with a roll paper holding device according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view showing an exploded roll paper setting unit.
FIG. 3 is a side view schematically showing a state in which roll paper is set in a roll paper setting unit.
FIG. 4 is a plan view showing a state in which roll paper is mounted on the flange of the roll paper setting unit, and a spacer member mounted between the flange and the roll paper.
FIG. 5 is a plan view showing a state in which a spacer member is mounted between the flange and the roll paper.
FIG. 6 is a perspective view showing only a spacer member.
FIG. 7 is a side view schematically showing a state in which the roll paper is conveyed with the spacer member mounted.
FIG. 8 is a side view for explaining a state in which the roll paper is loosened and loosened.
FIG. 9 is a view for explaining a state in which the spacer member suppresses the fraying.
FIG. 10 is an enlarged partial side view showing a sheet presser portion of a spacer member.
11A and 11B are views showing a roll holding device according to a second embodiment of the present invention, in which FIG. 11A is a perspective view showing a flange thereof, and FIG. 11B is a partial side view showing a state where the roll is mounted on roll paper. .
FIGS. 12A and 12B are diagrams showing a relationship between a flange and an edge of a roll paper in a conventional roll paper holding device, where FIG. 12A shows a normal state, and FIG. 12B shows a state in which management and processes are poorly dispersed. (C) shows a state where the end of the roll paper has expanded due to moisture absorption.
13A and 13B are diagrams illustrating a case where the flange is attached and stored in a standing state, in which FIG. 13A is a perspective view thereof, and FIG. 13B is a partial side view illustrating a state in which winding deviation occurs at the edge of the roll paper. It is.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roll paper 3 Paper cutter 4 Registration roller 5 Image transfer part 6 Fixing part 7 Original reading part 8 Receptacle 13 Flange member 14 Flange part 15 Support cylindrical part 17 Roller 18 Step part 19 Spacer member 20 Spacer part 21 Lock lever 24 Handle part 22 Lock spring 25 Paper presser 25a Protrusion 26 Pressure spring 27 Through hole 28 Scale 41 Correction slot

Claims (5)

Has a support cylinder portion fitted into the hole of the central portion of the roll paper, a disc-shaped flange portion, the flange member comprising a stepped portion formed at the base of the support cylindrical portion, said by the stepped portion In a roll paper holding device that holds both ends of a roll paper so that a predetermined gap is formed between the inner surface of the flange portion and the end surface of the roll paper, the roll paper is detachably inserted into the gap and is inserted into the step portion. A roll paper holding device comprising a spacer member that is attached and removed during use . The roll paper holder according to claim 1, wherein the spacer member has a portion protruding outward from an outer periphery of the roll paper when the spacer member is inserted into the gap and attached to the step portion of the flange member. apparatus.   The roll paper holding device according to claim 1, wherein a handle portion is provided on the spacer member.   The roll paper holding device according to claim 1, wherein the spacer member is provided with a scale indicating a remaining amount corresponding to an outer diameter of the roll paper. 5. The roll paper holding device according to claim 1, wherein the spacer member is provided with a stopper for pressing a part of the outer peripheral surface of the roll paper.

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