JP3743785B2 - Paper transport device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet conveying apparatus that is applied to an image forming unit that forms an image on a sheet such as a facsimile machine and a copying machine, and includes a pair of rollers for conveying the sheet in a predetermined direction.
[0002]
[Prior art]
Consumables in components such as copying machines have an attachment mechanism that can be replaced without using a tool such as a screwdriver so that a general user can easily replace the consumables.
[0003]
Usually, in an attachment structure in which a part can be exchanged without using a screw, it can be removed by pulling the part to be exchanged with respect to the attachment part and can be attached by inserting the part.
[0004]
[Problems to be solved by the invention]
In the conventional mounting structure, if the component can be easily removed by a too weak tensile force, it may be easily detached even in a normal use state. It is necessary to design to.
[0005]
However, if the parts to be replaced are large and the storage space is large, the operator's fingers can be sufficiently applied to the parts during replacement work, and a large tensile force can be applied. However, the parts are small and the storage space is narrow. In addition, since sufficient force cannot be applied, it is not possible to easily remove and attach the parts.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet conveying apparatus that solves the above-mentioned conventional problems and that can easily exchange conveying rollers with a simple configuration.
[0007]
[Means for Solving the Problems]
To achieve the above object, the present invention includes a conveying roller for conveying the sheet, and a bracket for holding the transport roller rotatably, and a cover member for supporting the bracket rotatably, the cover body In the paper conveying apparatus that is rotatably supported with respect to the apparatus body, the storage part of the apparatus body can be opened and closed, and the bracket can be inserted into and removed from the storage part together with the opening and closing operation of the cover body . The bracket is provided with a protrusion that engages with a part of the cover body when the cover body is pivotally moved, and the bracket is rotated to release the engagement between the protrusion and the cover body. are those in which a knob is located outside of the cover member, this structure, when replacing the conveying roller, the conveying roller by rotating the bracket, knob It is possible to put to the outside from the housing portion of the apparatus main body by the operation, it is possible to perform the replacement in the external wide working space.
[0009]
Further, the present invention, when releasing the locking of the rotated projection and said cover member said bracket, so as to release the locking by receiving rotational force of the knob is bent part of the bracket With this configuration, smooth rotation movement in the bracket and click feeling at the time of unlocking are performed, and the bracket easily rotates from the stored state. Can be prevented.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
[0011]
FIG. 2 is a block diagram of an original reading apparatus for explaining an embodiment of the present invention. In FIG. 2, 1 is an apparatus main body, 2 is an original setting table installed on the upper part of the apparatus main body 1, and 3 is an original setting table 2. Pickup rollers for feeding the original to be set, 4 and 5 are known feed rollers and separation rollers for separating and conveying the fed originals one by one, and 6 is a known optically reading document information , An optical reading sensor 7, a reading roller 7 for conveying the document to the optical reading sensor 6, and a discharge roller 8 for discharging the document to the paper discharge unit 9. The arrows in the figure indicate the document conveyance path.
[0012]
FIG. 1 is an exploded perspective view showing in detail an attachment portion of the separation roller 5 in FIG. 2, and 10 is a storage portion installed on the upper portion of the apparatus main body 1, and this storage section 10 is attached to the apparatus main body 1. The cover body 11 is rotatably supported on a support shaft 8a of one paper discharge roller 8. The cover body 11 includes a separation roller 5, one reading roller 7, the one paper discharge roller 8, and the like. Is retained. Further, holding frame bodies 12 are installed on both sides of the cover body 11, and a bracket 14 is fixed to the approximate center of a rotating shaft 13 rotatably supported by the holding frame body 12, and a separation roller is attached to the bracket 14. 5 is installed. A knob 15 is attached to one end of the rotating shaft 13 so that the rotating shaft 13 can be rotated from the outside.
[0013]
The bracket 14 has a pair of opposing arm portions 20, the rotary shaft 13 is fixed to one end portion of each arm portion 20, and a locking groove 21 is formed at the other end portion of each arm portion 20. . A central shaft 22 protruding from both ends of the separation roller 5 is detachably fitted into the groove from the opening 21a of each locking groove 21. Further, a stopper projection 23 is projected from the upper end of one end of each arm portion 20 (the upper left end in the figure).
[0014]
FIG. 3 is an explanatory view showing a set state of the feed roller 4 and the separation roller 5. The separation roller 5 is in contact with the feed roller 4 while being held by the bracket 14, and a sheet (not shown) is known as is well known. The double feeding of the paper is prevented by the difference in the frictional resistance at the nip portion N with the feed roller 4.
[0015]
4 and 5 are explanatory views of the replacement operation of the separation roller 5. At the time of replacement, the operator first rotates the cover body 11 counterclockwise around the support shaft 8a from the state shown in FIG. Then, the storage section 10 of the apparatus main body 1 is opened. Then, as shown in FIG. 4, the separation roller 5 moves upward together with the cover body 11 while being held in the cover body 11 together with the bracket 14. In this state, the separation roller 5 is locked with the stopper protrusion 23 of the bracket 14 in contact with the inner wall of the cover body 11 and is not sufficiently exposed to the outside.
[0016]
From this state, when the operator turns the rotary shaft 13 clockwise by turning the knob 15 shown in FIG. 1, the bracket 14 is centered on the rotary shaft 13 as shown in FIG. By rotating clockwise, the separation roller 5 comes out of the cover body 11. Even if the stopper projection 23 is locked by the inner wall of the cover body 11 during the pivoting movement of the bracket 14, the locking relationship is released by the deflection of the bracket 14 itself or the rotating shaft 13. At the time of releasing the lock, the operator can get a click feeling and recognize that the release is complete.
[0017]
In the state of FIG. 5, since the opening 21 a of the locking groove 21 of the separation roller 5 and the bracket 14 is located outside the storage unit 10 portion of the apparatus body 1, the operator's finger is sufficiently hung on the separation roller 5. In addition, since there is sufficient space in the removal direction of the separation roller 5, the separation roller 5 can be easily removed from the bracket 14 against the holding force of the locking groove 21 against the central shaft 22 of the separation roller 5. Can be pulled out.
[0018]
When the replacement of the separation roller 5 is completed and returned, the operator turns the rotating shaft 13 counterclockwise by the knob 15 from the state shown in FIG. 5, and the bracket 14 is rotated as shown in FIG. The separation roller 5 enters the cover body 11 by rotating counterclockwise about 13. In the middle of the pivoting movement of the bracket 14, the stopper projection 23 is locked by the inner wall of the cover body 11. However, the locking relationship is released by bending the bracket 14 itself or the rotating shaft 13 as described above. The At the time of releasing the lock, the operator can get a click feeling and recognize that the storage has been completed.
[0019]
If the operator turns the cover body 11 clockwise about the support shaft 8a from the storage state of FIG. 4, the cover body 11 closes the storage portion 10 of the apparatus main body 1, and the set shown in FIG. It can be returned to the state.
[0020]
In the present embodiment, the attachment structure in the separation roller 5 portion is exemplified, but the same attachment structure can be adopted in other roller portions.
[0021]
【The invention's effect】
As described above, according to the paper conveyance device of the present invention, a general user can take out a conveyance roller to a predetermined position with a simple configuration. And the practical effect that it can remove and attach reliably is acquired.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a mounting portion of a separation roller in an original reading apparatus according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a document reading apparatus for explaining an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing a set state of a feed roller and a separation roller in the apparatus of the present embodiment.
FIG. 4 is an explanatory view showing a state in the middle of an operation of replacing the separation roller in the apparatus according to the present embodiment.
FIG. 5 is an explanatory diagram showing a state when the separation roller is replaced in the apparatus of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Apparatus body, 4 ... Feed roller, 5 ... Separation roller, 10 ... Storage part, 11 ... Cover body, 12 ... Holding frame, 13 ... Rotating shaft, 14 ... Bracket, 15 ... Pick, 20 ... Arm part of bracket 21 ... Locking groove, 21a ... Groove opening, 22 ... Central shaft, 23 ... Stopper projection.

Claims (2)

A conveying roller for conveying the sheet, and a bracket for holding the transport roller rotatably, and a cover member for supporting the bracket rotatably, pivotally supporting the cover body relative to the apparatus main body In the paper conveying apparatus in which the housing portion of the apparatus main body can be opened and closed, and the bracket can be inserted into and removed from the housing portion together with the opening and closing operation of the cover body , the bracket is pivoted relative to the cover body . Providing a protrusion to be locked to a part of the cover body sometimes, and releasing a lock between the protrusion and the cover body by rotating the bracket to provide a knob for positioning the bracket outside the cover body A paper conveying apparatus characterized by the above. To release the engagement between the cover member and the projection by rotating the bracket, characterized in that receiving the rotational force of the knob and configured to release the locking is bent part of the bracket The sheet conveying apparatus according to claim 1.

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