JP2522733Y2 - Paper transport mechanism - Google Patents

Description

[Detailed description of the invention] [Overview] Regarding the paper transport mechanism using the feed roller, the purpose is to secure the parallelism between the set of transport rollers and prevent paper jam, A first support fitting for rotatably supporting an end of a shaft and engaging and fixing wedge-shaped projections projecting from both side ends into holes, and a rotatable end of a central shaft of a roller pressed against a roller; A second support fitting that supports the wedge-shaped projections protruding at both ends and that can move in the direction perpendicular to the sheet conveyance direction by fitting into the other opposing hole, and the first and second support fittings have ends thereof. The part is provided with an engaging part that engages with each other.

[Industrial applications]

The present invention relates to a paper transport mechanism using a feed roller.

[Conventional technology]

As shown in the side view of FIG. 2, the paper transport mechanism includes a transport path 2 for guiding the paper to a predetermined position, a feed roller 3 provided in the transport path 2, and a pinch roller 4 pressed against the feed roller 3. Is generally used.

In such a configuration, the feed roller 3 is supported by a support member 5 that rotatably supports the end of the center shaft 3a, and the support member 5 is fixed to the transport path 2.

The fixing method is as follows: wedge-shaped protrusions 6
And is engaged with a through hole 7 of one wall 2a of the transport path 2 of the wedge-shaped projection 6.

The center shaft 3a is connected to a drive mechanism not shown,
It is rotationally driven by a driving mechanism.

On the other hand, the pinch roller 4 is also supported by support brackets 8 that rotatably support both ends of the center shaft 4a, and the support bracket 8 is attached to the transport path 2.

Attachment is performed by allowing wedge-shaped projections 9 projecting from both side ends of the support fitting 8 to fit into the through holes 10 of the other wall 2b of the transport path 2. It is possible to move in a direction perpendicular to the conveyance path 2 within the range.

The head of the pinch roller support bracket 8 is urged by a spring means such as a coil spring 11 to urge the supported pinch roller 4 so as to press it against the feed roller 3.

With such a configuration, the positioning of the feed roller 3 and the pinch roller 4 is determined by the two walls 2a and 2b of the transport path 2.

The transport path 2 can be opened and closed to take out the paper when the paper is jammed, and the two walls 2a and 2b
It is easy to be shifted or inclined.

Then, the rollers are displaced from each other, so that the parallelism cannot be ensured, which causes a paper jam.

For this reason, in order to position the two wall portions 2a and 2b relative to each other, the transport path 2 is provided with engaging portions 12 having irregularities so as to engage with each other.

The engaging portions 12 are provided on both sides of the walls 2a and 2b, avoiding the sheet transport area.

[Problems to be solved by the invention]

As described above, the positioning of the feed roller and the pinch roller is performed. However, since the positioning is performed at the engaging portion of the transport path, errors are accumulated and accuracy is hardly obtained.

In addition, sufficient rigidity is required for the wall portion, which increases the size of the mechanism and increases the weight.

Further, there is a problem that the wall portion is deflected due to the urging of the roller, and the parallelism cannot be secured.

SUMMARY OF THE INVENTION An object of the present invention is to prevent a paper jam by securing a parallelism between a set of conveying rollers.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, as shown in the side view of FIG. 1, wedge-shaped projections 14 are provided which rotatably support the end of the center shaft 3a of the roller 3 and project from both ends. The first support member 13 that is engaged with and fixed to the hole 15 is opposed to the wedge-shaped projection 17 that is rotatably supported at the end of the central shaft 4a of the roller 4 that is pressed against the roller 3 and that is provided at both ends. Local hole 18 in position
A second support fitting 16 which can move in the direction perpendicular to the sheet conveying direction while being fitted with the first support fitting 13; It is a thing.

[Action]

The feed roller and the pinch roller are directly positioned by the engagement portions at the ends of the first and second support fittings, and contact while ensuring parallelism.

For this reason, there is no influence from the positional error of the transport path.

〔Example〕

 FIG. 1 shows an embodiment of the present invention.

 The same parts are denoted by the same reference numerals throughout the drawings.

In the present invention, as shown in the side view of FIG. 1, similarly to the prior art, the end of the center shaft 3a of the feed roller 3 is rotatably supported, and the wedge-shaped projections 14 projecting from both ends are fed. A first support fitting which is engaged with and fixed to a hole 15 of one wall 2a of the road 2
13 and the center axis of the pinch roller 4 pressed against the feed roller 3
Both ends of 4a are rotatably supported, and wedge-shaped projections 17 projecting from both ends are loosely fitted into the other hole 18 at the opposite position of the other wall 2b of the paper transport path 2 to be perpendicular to the paper transport direction. A second support fitting 16 which is movable in a direction, and furthermore, opposite ends of the first and second support fittings 13 and 16 are engaged with each other.
It is equipped with 19.

That is, the central portions of the opposing ends of the first and second support fittings 13 and 16 project into the transport path 2, and one of the central portions has a convex portion 19a and the other has a concave portion 19b. It constitutes an engaging portion 19 which can be inserted and removed.

The head of the second support member 16 is urged by a spring means such as the coil spring 11 in the same manner as in the prior art, and urges the supported pinch roller 4 to press against the feed roller 3.

Because of such a configuration, the feed roller 3 and the pinch roller 4 are directly positioned by the engaging portions 19 at the ends of the first and second support fittings 13 and 16 to secure the parallelism. Touch

For this reason, even if the transport path 2 is opened and closed, it is not affected by the positional error.

[Effect of the invention]

According to the present invention, the feed roller and the pinch roller are directly positioned by the engaging portion of the support metal without being affected by the transport path, and contact with securing parallelism.

For this reason, a great deal of economic and industrial effects can be achieved, for example, the occurrence of paper jam can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of the paper transport mechanism of the present invention, and FIG. 2 is a side view of a conventional paper transport mechanism. In the drawing, 2 is a transport path, 2a and 2b are walls, 3 is a feed roller, 3a and 4a are center axes, 4 is a pinch roller, 5, 8 are support brackets, 6,
9, 17 are wedge-shaped projections, 7, 10, 15, and 18 are holes, 11 is a coil spring, 12 is an engaging portion, 13 is a first support fitting, 16 is a second support fitting, 19 is an engaging portion, 19a is a convex portion, and 19b is a concave portion.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoshi Nakamichi No. 35, Saho, Kato-gun, Hyogo (No address) Inside Fujitsu Peripheral Machinery Co., Ltd. (72) Michihiro Fujii, No. 35, Saho, Kato-gun, Hyogo (No address) Inside Fujitsu Peripheral Equipment Co., Ltd.

Claims (1)

(57) [Scope of request for utility model registration] 1. A first fixing means for rotatably supporting an end of a center shaft (3a) of a roller (3) and engaging a wedge-shaped projection (14) protruding at both ends with a hole (15). And the central axis (4) of the roller (4) pressed against the roller (3).
The end of (a) is rotatably supported, and the wedge-shaped projections (17) projecting from both ends are fitted into the other hole (18) located at the opposite position and can move in the direction perpendicular to the paper conveyance direction. A sheet transport, comprising: a second support (16); and the first and second support (13, 16) are provided with engaging portions (19) at their ends. mechanism.