JP3558282B2 - Sheet conveyance width adjustment device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sheet conveying width adjusting device.
[0002]
[Prior art]
Conventionally, in a device such as a facsimile device that uses a sheet to convey a sheet, in order to improve straightness during sheet conveyance, a sheet conveyance width adjustment device that guides the sheet in a width direction is provided. Such a conventional sheet conveying width adjusting device will be described with reference to FIGS.
[0003]
FIG. 2 is a top view showing the external configuration of a general facsimile machine, FIG. 3 is a rear cross-sectional view showing the configuration of a sheet conveyance width adjustment device provided in the facsimile machine, and FIG. 4 is the configuration of the sheet conveyance width adjustment device. FIG.
[0004]
2 to 4, reference numeral 11 denotes an operation panel, and 12 denotes a rear cover. The rear cover 12 has stoppers 12a and 12b formed thereon. Reference numeral 13 denotes a right original hopper movably attached to the rear cover 12 in the left-right direction. Reference numeral 14 denotes a left original hopper movably attached to the rear cover 12 in the left-right direction. The hopper 14 is formed with convex portions 13a and 14a for guiding the document width, rack portions 13b and 14b, and stoppers 13c and 14c.
[0005]
Reference numeral 15 denotes a pinion that meshes with the rack portions 13b and 14b of the right document hopper 13 and the left document hopper 14. The pinion 15 has a right document hopper 13 and a left document hopper 14 on its lower surface such that the fixed document hopper 13 and the left document hopper 14 do not float more than a certain amount. Is formed. Reference numeral 16 denotes a screw for rotatably attaching the pinion 15 to the rear cover 12, and reference numeral 17 denotes a spring interposed between the pinion 15 and the rear cover 12. A load such that the right document hopper 13 and the left document hopper 14 do not move due to the document conveyance load is applied to the right document hopper 13 and the left document hopper 14 via the pinion 15.
[0006]
In such a configuration, the right document hopper 13 and the left document hopper 14 are mounted so as to be located at target positions in the left-right direction with respect to a point A which is a center at the time of document conveyance. The right document hopper 13 and the left document hopper 14 are moved in conjunction with each other by the same amount so that the right document hopper 13 and the left document hopper 14 are moved in the left and right directions to obtain various sizes. The document guides the width direction of the document to improve the straightness of the document when transmitting or copying the document.
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, the right document hopper 13 and the left document hopper 14 are attached so that the right document hopper 13 and the left document hopper 14 are located at target positions in the left and right directions around a point A which is a center during document conveyance. The hopper 14 must be moved until the stoppers 2a and 2b of the rear cover 2 contact the stoppers 13c and 14c of the right document hopper 13 and the left document hopper 14, respectively, and the pinion 5 must be assembled while maintaining the positions. If the teeth of the racks 13b and 14b of the right original hopper 13 or the left original hopper 14 and the tooth grooves of the pinion 15 are displaced by one tooth, the right original hopper 13 and the left original hopper 14 are the point A which is the center at the time of original conveyance. Facsimile machine may not be found even if it is asymmetric It is necessary to check the print data by the sending and receiving test or copying test.
[0008]
Further, the user has noticed that the image is deviated to the left or right by print data from a transmission / reception test or a copy test of a facsimile apparatus or the like, and the right document hopper 13 and the left document hopper 14 are positioned with respect to point A, which is the center during document conveyance. Even if it is found that the facsimile machine is located in an asymmetric position, the facsimile machine is an assembled product, so it is not possible to reassemble without removing many parts, so it is necessary to pay close attention to assembly. there were.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet conveying width adjusting device capable of easily finding whether or not an original hopper is located at an asymmetric position and improving operability when assembling the original hopper. is there.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a pair of sheet width adjustment plates that are arranged movably in parallel with each other and that have racks on opposing surfaces, and a common pinion that meshes with the racks of the sheet width adjustment plates. A first tooth and a second tooth having a thickness greater than the first tooth are meshed with the pair of racks only with the pinion and the first tooth only. A first tooth space to be formed and a second tooth space to be engaged with both the first and second teeth, respectively, while the pair of sheet width adjusting plates are attached to target positions with respect to the center. In this case, the first and second teeth and the first and second tooth spaces are arranged so that the second teeth and the second tooth spaces mesh with each other.
[0011]
Therefore, according to the present invention, when the pair of seat width adjustment plates are attached to the target position with respect to the center, the second teeth formed on the rack and the second tooth grooves formed on the pinion are formed. By arranging the first and second teeth and the first and second tooth grooves formed on the rack and the pinion so as to mesh with each other, the pair of sheet width adjusting plates are mounted at target positions with respect to the center. Only when is it possible to make the sheet width adjustment plate operate normally.
[0012]
In addition, in addition to the above configuration, the present invention has a configuration in which a flange is formed on the lower surface of the pinion, and the engagement of the second tooth and the first tooth space is prevented by the flange. .
[0013]
Therefore, according to the present invention, when the field adjustment plate is not attached to the target position with respect to the center, the pair of sheets have the second teeth formed on the rack and the first tooth grooves formed on the pinion. Is prevented by a flange formed on the lower surface of the pinion, so that only when the pair of sheet width adjustment plates are attached to the target position with respect to the center, the sheet width adjustment plate operates normally. Can be done.
[0014]
Further, according to the present invention, in addition to any one of the above configurations, the second teeth are arranged at the same position of the pair of racks, and the second tooth grooves are respectively arranged at point-symmetric positions of the pinion. It is configured to be arranged.
[0015]
Therefore, according to the present invention, when assembling the sheet width adjusting plate and the pinion, the second teeth formed on the pair of racks are respectively inserted into the second tooth grooves arranged and formed at point-symmetric positions of the pinion. The engagement allows the pair of sheet width adjusting plates to be attached to the target position with respect to the center.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is an exploded perspective view showing a configuration of a sheet conveying width adjusting apparatus according to an embodiment of the present invention, and FIG. 2 is a top view showing an external configuration of a general facsimile apparatus.
[0018]
Hereinafter, a sheet conveying width adjusting device according to an embodiment of the present invention will be described with reference to FIGS.
[0019]
1 and 2, reference numeral 1 denotes an operation panel, 2 denotes a rear cover, 3 denotes a right document hopper which is movably attached to the rear cover 2 in the left and right direction, and 4 denotes a right and left movement to the rear cover 2. The right document hopper 3 and the left document hopper 4 are formed with convex portions 3a, 4a for guiding the document width and rack portions 3b, 4b, and further with rack portions 3b, 4b. Are formed with first teeth 3c and 4c having a normal tooth thickness and second teeth 3d and 4d having a tooth thickness larger than the tooth thickness of the first tooth gaps 3c and 4c.
[0020]
Reference numeral 5 denotes a pinion meshing with the rack portions 3b, 4b of the right document hopper 3 and the left document hopper 4, and the pinion 5 has a first tooth groove 5a having a groove thickness equivalent to that of the first teeth 3c, 4c. And a second tooth groove 5b having a groove thickness equivalent to that of the second teeth 3d, 4d, and a flange portion 5c for closing the lower surfaces of the first tooth groove 5a and the second tooth groove 5b are formed. The flange 5c regulates the right document hopper 3 and the left document hopper 4 so that they do not float above a certain level, and regulates the second teeth 3d, 4d so as not to mesh with the first tooth grooves 5a. .
[0021]
Reference numeral 6 denotes a screw for rotatably attaching the pinion 5 to the rear cover 2. Reference numeral 7 denotes a spring interposed between the pinion 5 and the rear cover 2. When the original is guided by the urging force of the spring 7. A load such that the right document hopper 3 and the left document hopper 4 do not move due to the document transport load is applied to the right document hopper 3 and the left document hopper 4 via the pinion 5.
[0022]
Then, in the above configuration, for example, when 18 tooth grooves are formed in the pinion 5, the first tooth grooves 5a are formed in the first to eighth and tenth to 17th positions, The second tooth groove 5b is formed in the 0th and ninth positions, while the first teeth 3c, 4c and the second teeth 3d, 4d are formed in the same positions of the rack portions 3b, 4b, thereby forming the 0th position. The center is formed by assembling the components in a state where the second teeth 3d mesh with the formed second tooth grooves 5b and the second teeth 4d mesh with the ninth formed second tooth grooves 5b. The positions of the left and right original hoppers 3 and 4 can be adjusted with the point A as the center.
[0023]
Moreover, even if each part is assembled in a state where the first teeth 3c and 4c are engaged with the second tooth space 5b by mistake, when the right or left original hoppers 3 and 4 are slid and checked, 5 also rotates together and the second teeth 3d and 4d abut on the flange 5c and do not mesh with each other, so that the right or left original hoppers 3 and 4 cannot slide. 4 position deviations can be found.
[0024]
【The invention's effect】
As described above, according to the present invention, the second teeth formed on the rack and the second teeth formed on the pinion when the pair of seat width adjustment plates are attached to the target position with respect to the center. By arranging the first and second teeth and the first and second tooth grooves formed on the rack and the pinion so that the grooves mesh with each other, the pair of sheet width adjustment plates is positioned at the target position with respect to the center. Only when the seat width adjustment plate is mounted, the seat width adjustment plate can be operated normally.By operating the sheet width adjustment plate, it is determined whether or not the pair of sheet width adjustment plates are in the asymmetric position. It can be easily found and the outflow of defective products to the market can be reliably prevented.
[0025]
Further, according to the present invention, when the sheet width adjusting plate and the pinion are assembled, the second teeth formed on the pair of racks are respectively inserted into the second tooth grooves arranged and formed at point-symmetric positions of the pinion. By meshing, the pair of sheet width adjusting plates can be mounted at target positions with respect to the center, so that each component can be easily assembled, and assembling workability can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a configuration of a sheet conveying width adjusting device according to an embodiment of the present invention.
FIG. 2 is a top view showing an external configuration of a general facsimile apparatus.
FIG. 3 is a rear cross-sectional view showing a configuration of a conventional sheet conveying width adjusting device.
FIG. 4 is an exploded perspective view showing the configuration of the sheet conveyance width adjusting device.
[Explanation of symbols]
3 right original hopper 3a convex portion 3b rack portion 3c first tooth 3d second tooth 4 left original hopper 4a convex portion 4b rack portion 4c first tooth 4d second tooth 5 pinion 5a first tooth groove 5b 2 tooth groove 5c flange

Claims (3)

In a sheet conveying width adjusting device comprising a pair of sheet width adjusting plates arranged so as to be movable in parallel with each other and having a rack on the opposing surface and a common pinion meshing with the rack of the sheet width adjusting plate,
A first tooth, a second tooth having a greater tooth thickness than the first tooth, a first tooth groove meshing only with the first tooth on the pinion, A second tooth space meshing with both the first and second teeth is respectively formed,
The first and second teeth and the second teeth are arranged such that the second teeth mesh with the second tooth spaces when the pair of seat width adjustment plates are mounted at target positions with respect to the center. A sheet conveying width adjusting device, wherein a first and a second tooth space are arranged. The sheet conveying width adjusting device according to claim 1, wherein a flange portion is formed on a lower surface of the pinion, and the engagement of the second tooth and the first tooth groove is prevented by the flange portion. The said 2nd tooth is arrange | positioned at the same position of a pair of said racks, The said 2nd tooth groove is each arrange | positioned at the point symmetry position of the said pinion, The said 1st or 2nd characterized by the above-mentioned. Sheet width adjustment device.

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