JPH0533097Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a facsimile device, and more specifically, the present invention aims to improve the document reading accuracy by improving the state in which the document is held at the document reading position by the optical system. The present invention also proposes a facsimile machine that is designed to prevent paper jams.

[Prior art]

In recent years, facsimile devices have become widespread, but with conventional facsimile devices, when a document is inserted into the device and read, the document is not held securely, resulting in a decrease in resolution, a change in the scanning width, etc. In addition, in a configuration using two systems of sensors and lens systems for reading a document, overlaps or conversely omissions may occur at the boundary portions. On the other hand, if the configuration was such that the document could be held more reliably, paper jams could occur.

FIG. 5 is a schematic partial side sectional view showing the configuration of a conventional general facsimile device.

In the figure, 30 is the main body of the apparatus, which is equipped with a control device, various drive devices, etc. (not shown), and side plates 31, 31 on both sides are frames that pivotally support the separation roller 18, paper feed rollers 2, 3, etc., which will be described later. It's summery.
40 is a cover, which is not shown in the figure,
The lower end portion of the shaft 7 is pivotally supported on a support member extending from the main body 30 to the cover 40 side. At the upper end of the cover 40, a lock pin 9 is provided, which is pivoted at its approximate center on the cover 40, has one end engageable with a lock pin 9 provided on the main body 30, and is stretched between the other end and the cover 40. A lock lever 8 is provided with one end biased toward the lock pin 9 by a tension spring 21. By engaging these lock levers 8 and lock pins 9,
The cover 40 is in a closed state with respect to the main body 30,
A document conveying path 1 is formed by a gap between a side plate 32 provided on a surface of the main body 30 facing the cover 40 and side plates 42 and 43 provided on a surface of the cover 40 facing the main body 30 .

Further, when the engagement between the lock lever 8 and the lock pin 9 is released, the upper part of the cover 40 is
Since the cover 40 is opened by rotating in the left direction of the arrow in the figure, maintenance such as handling paper jams and replacing parts can be easily performed.

The upper part of the side plate 32 of the main body 30 is connected to the main body 3 from a slightly lower part than the position of the lock pin 9 mentioned above.
The document mounting table 33 is bent obliquely toward the 0 side.

Reference numeral 18 in the figure is mounted on a shaft between the side plates 31, 31 so that its outer periphery protrudes slightly toward the document conveyance path 1 side beyond the surface of the bent portion of the side plate 32, and is rotated in FIG. 5 by a drive device (not shown). It is a separating roller that is rotated in a clockwise direction. The other end of a brake piece 19 whose one end is fixed to the cover 40 extends downstream of the document transport path 1 and comes into contact with the separation roller 18 . With this brake piece 19,
The plurality of originals 10 placed on the original placing table 33 are once locked, but only the lowest one is dragged by the separation roller 18 and sent into the original transport path 1.

2 in the figure indicates the document transport path 1 of the separation roller 18.
This is a paper feed roller that is mounted on a shaft between the side plates 31, 31 with its outer periphery protruding slightly from the surface of the side plate 32 toward the document conveyance path 1 at a position on the downstream side, and 3 is near the exit B of the document conveyance path 1. This is a paper feed roller that is mounted between the side plates 31, 31 with its outer periphery slightly protruding toward the document conveyance path 1 side from the surface of the side plate 32 at the position.

Tension rollers 5 and 6, which are mounted between side plates 41 and 41 of the cover 40, are brought into contact with these paper feed rollers 2 and 3 with appropriate pressure, respectively. Both paper feed rollers 5 and 6 are driven to rotate counterclockwise in FIG. 5 at a predetermined speed by a drive device (not shown).

Therefore, the original 10 sent into the original transport path 1 by the separation roller 18 is inserted between the paper transport roller 2 and the tension roller 5, is transported to the exit B side at a predetermined speed, and is further prepared for the exit B. The paper is inserted between the paper feed roller 3 and the tension roller 6, and is discharged from the outlet B.

The opposing gap between the side plate 32 of the main body 30 and the side plate 43 of the cover 40 in a portion of the document conveyance path 1 slightly closer to the entrance A than the paper feed roller 3 is formed to be narrower than other portions, forming the document reading section 11 . This manuscript reading section 1
Reference numeral 1 denotes a document reading plate 12 with a side plate of the main body 30 protruding in one direction of the document conveyance path, and a side plate 43 of the cover 40.
and a back plate 16 with a white surface attached to the side of the document conveyance path 1, and the opposing gap between the two is approximately the same as that of the side plates 32 and 42 in other parts of the document conveyance path 1. Manuscript 10
It has been narrowed to a point that is slightly wider than the thickness of.

A long hole into which a glass plate is fitted is formed in the document reading plate 12 over substantially the entire width direction of the document transport path 1, and a document reading window 13 is formed by this long hole. Document conveyance path 1 of this document reading window 13
A document reading device 34 including a lens system 14 and a photo sensor 15 is provided on the main body 30 side in a direction orthogonal to the main body 30 . A light source 17 is provided near the document reading section 11 of the main body 30, and the reflected light of the light projected from the light source 17 onto the document 10 located in the document reading section 11 through the document reading window 13 is reflected by the lens system 14.
The document 10 is read by entering the photo sensor 15 via the photo sensor 15 .

By the way, in the conventional facsimile device, the cover 40 can be opened and closed by releasing the engagement between the lock lever 8 and the lock pin 9, as described above. This is done in consideration of maintenance etc., but in such a configuration, the cover 40
Each time the cover 40 is opened and closed, the opposing gap between the back plate 16 of the document reading unit 11 and the document reading plate 12 may be damaged due to wear over time of the pivot shaft 7 of the cover 40, the engaging portion of the lock lever 8, etc., or due to assembly tolerances during manufacturing. Although it is unavoidable that some variation will occur,
This variation in the facing gap between the back plate 16 and the original reading plate 12 is caused by the fact that if this gap is larger than the designed value, the holding of the original 10 at the original reading position 11 becomes uncertain, and the original 10 oscillates, causing the light source 17 to deviate from the light source 17. Since the optical path length passing through the document 10 and reaching the photo sensor 15 changes, the resolution of the photo sensor 15 decreases,
A change in reading width (field of view width) occurs.

FIG. 6 shows that the reading device 34 has two sets of lens systems 1
4, 14' and a photo sensor 15, 15'. In such a configuration, both photo sensors 15,
Although the connecting portion X of the reading range of the photo sensor 15' for the original 10 is strictly aligned, if the original 10 is not held securely as described above, the reading range of both photo sensors 15, 15' for the original 10 may be Connection part X is both photo sensors 15, 15'
may be read twice, or may be missing.

On the other hand, if the facing gap between the back plate 16 and the original reading plate 12 becomes narrower than the designed value, the original 1
Sometimes 0 got stuck in this part.

[Purpose of invention]

The present invention was developed in view of the above-mentioned circumstances, and the gap in the document conveyance path is too wide to maintain a constant gap in the portion of the document conveyance path where the document is read by the document reading device. To provide a facsimile device which prevents a decrease in resolution and a fluctuation in reading width due to the shaking of a document, and conversely prevents a paper jam from occurring due to being too narrow.

[Structure of the idea]

A facsimile device according to the present invention is a facsimile device configured to read a document from one side of a document reading section formed by two plate-like members placed opposite each other during conveyance of the document. The two plate-like members are biased toward each other, and at least one of the plate-like members is formed with a protrusion that maintains a gap slightly larger than the thickness of the document between the two plate-like members. It is characterized by

〔Example〕

Hereinafter, the present invention will be described in detail based on drawings showing embodiments thereof.

FIG. 1 is a schematic partial side sectional view showing the configuration of a facsimile device according to the present invention (hereinafter referred to as the device of the present invention), and the same members as those of the conventional facsimile device shown in FIG. It is attached.

In the figure, 30 is the main body of the apparatus, which is equipped with a control device, various drive devices, etc. (not shown), and side plates 31, 31 on both sides are frames that pivotally support the separation roller 18, paper feed rollers 2, 3, etc., which will be described later. It's summery.
40 is a cover, which is not shown in the figure,
The lower end portion of the shaft 7 is pivotally supported on a support member extending from the main body 30 to the cover 40 side. At the upper end of the cover 40, a lock pin 9 is provided, which is pivoted at its approximate center on the cover 40, has one end engageable with a lock pin 9 provided on the main body 30, and is stretched between the other end and the cover 40. A lock lever 8 is provided with one end biased toward the lock pin 9 by a tension spring 21. By engaging these lock levers 8 and lock pins 9,
The cover 40 is in a closed state with respect to the main body 30,
A side plate 32 provided on the surface of the main body 30 facing the cover 40, and side plates 42, 43' and 42, 4 provided on the surface of the cover 40 facing the main body 30.
A back plate 1 with a white surface provided between 3'
A document conveyance path 1 is formed by the opposing gap with 6'.

The upper part of the side plate 32 of the main body 30 is connected to the main body 3 from a slightly lower part than the position of the lock pin 9 mentioned above.
The document mounting table 33 is bent obliquely toward the 0 side.

Reference numeral 18 in the figure is mounted on a shaft between the side plates 31, 31 so that its outer periphery protrudes slightly toward the document conveyance path 1 side beyond the surface of the bent portion of the side plate 32, and is rotated in FIG. 5 by a drive device (not shown). It is a separating roller that is rotated in a clockwise direction. The other end of a brake piece 19 whose one end is fixed to the cover 40 extends downstream of the document transport path 1 and comes into contact with the separation roller 18 . With this brake piece 19,
The plurality of originals 10 placed on the original placing table 33 are once locked, but only the lowest one is dragged by the separation roller 18 and sent into the original transport path 1.

2 in the figure indicates the document transport path 1 of the separation roller 18.
This is a paper feed roller that is mounted on a shaft between the side plates 31, 31 with its outer periphery protruding slightly from the surface of the side plate 32 toward the document conveyance path 1 at a position on the downstream side, and 3 is near the exit B of the document conveyance path 1. This is a paper feed roller that is mounted between the side plates 31, 31 with its outer periphery slightly protruding toward the document conveyance path 1 side from the surface of the side plate 32 at the position.

Tension rollers 5 and 6, which are mounted between side plates 41 and 41 of the cover 40, are brought into contact with these paper feed rollers 2 and 3 with appropriate pressure, respectively. Both paper feed rollers 5 and 6 are driven to rotate counterclockwise in FIG. 5 at a predetermined speed by a drive device (not shown).

Therefore, the original 10 sent into the original transport path 1 by the separation roller 18 is inserted between the paper transport roller 2 and the tension roller 5, and is transported to the exit B side at a predetermined speed. The paper is inserted between the paper feed roller 3 and the tension roller 6, and is discharged from the outlet B.

A document reading section 11 is formed in a portion of the document conveyance path 1 that is slightly closer to the entrance A than the paper feed roller 3 .

FIG. 2 shows a cover 40 around the document reading section 11.
It is a schematic diagram seen from the side.

A side plate 32 on the side of the main body 30 of the document reading section 11 is formed to protrude in one direction of the document conveyance path, and the document reading plate 12 has a long hole in which a glass plate is fitted over substantially the entire width direction of the document conveyance path 1. A document reading window 13 is formed by this elongated hole.
A lens system 14 and a photo sensor 1 are provided on the main body 30 side of the document reading window 13 in the direction orthogonal to the document conveyance path 1.
5 is provided. A light source 17 is provided near the document reading section 11 of the main body 30, and the reflected light of the light projected from the light source 17 onto the document 10 located in the document reading section 11 through the document reading window 13 is reflected by the lens system 14. The document 10 is read by entering the photo sensor 15 via the photo sensor 15 .

The above-mentioned configuration is the same as that of the conventional device shown in FIG. Two protrusions 23 are provided on the document conveyance path 1 side (further outward) along the direction of the document conveyance path.

Protrusions 23, 23 in the width direction of the document transport path 1
The spacing between the projections 23 is slightly wider than the width of the largest document 10 that can be processed by the apparatus of this invention, and the height of each protrusion 23, that is, the length of the projection, is slightly wider than the thickness of the document 10 normally used. It's getting expensive.

On the other hand, the side plate 43 near the outlet B on the cover 40 side is divided into two parts. That is, it is divided into a side plate 43' that extends from the exit B to the document reading section 11, and a back plate 16' that extends from the document reading section 11.

When viewed from the side, the rear plate 16' of the present device has a lower part bent at a right angle toward the cover 40, an upper part bent once in a hypotenuse shape toward the cover 40, and then a document conveyance path 16' further bent toward the cover 40. is bent in a direction perpendicular to the document conveyance direction, and an intermediate portion connecting the upper and lower sides is formed parallel to the document conveyance direction. Further, L-shaped angles 16a, 16a are provided at both ends in the width direction of the document conveyance path 1 in a portion of the back plate 16' that is formed parallel to the document conveyance path 1. The tip edge of the other rib is fixed so that the rib is parallel to the back plate 16' and faces toward the center of the back plate 16'. Round holes 16b, 16b, into which pins 24, 24 (described later), can be loosely inserted, are formed in one rib of the angles 16a, 16a (the rib parallel to the back plate 16).

A portion of the side plates 41, 41 (only one is shown in FIG. 2) of the cover 40 that corresponds to the height position of the document reading section 11 has a section from approximately the center in the direction orthogonal to the document conveyance path 1. The back plate mounting portions 22 are bent at right angles to the inside of the cover 40, respectively.
22 is formed. Pins 24, 24 are installed vertically in the back plate mounting portions 22, 22, respectively, facing the direction of the document conveyance path. The pins 24, 24 allow the rear plate 1 to
6' is attached to the cover 40, and its attachment is done by attaching the coil springs 25, 25 to the pins 24, 24.
After externally fitting the angles 16a, 16a described above,
Pins 24 and 2 are inserted into the round holes 16b and 16b opened in
4 and fitting the E-ring 26 into the groove provided around the tips of the pins 24, 24.

Regarding the operation of the present device configured as described above, the third
The explanation will be made according to the schematic plan view shown in FIG.

FIG. 3 shows the state of the back plate 16' when the lock lever 8 and the lock pin 9 are disengaged and the cover 40 is opened.
0, that is, by separating the upper part from the main body 30 with its lower part as the center of rotation, the back plate 1
6' is the main body 30 due to the pressing force of the coil springs 25, 25.
It is projected in the direction.

When the upper side of the cover 40 is rotated in the direction of the main body 30 from the above-mentioned state, the back plate 16' eventually touches the protrusions 23, 23, . come into contact with
When the upper side of the cover 40 is further rotated toward the main body 30 and the lock lever 8 and the lock pin 9 are engaged to close the cover 40, the back plate 16' is moved to the fourth position.
As shown in the figure, it is pressed against protrusions 23, 23, . . . protruding from the document reading plate 12.

Therefore, when the cover 40 is closed, the gap in the document conveying path 1 of the document reading section 11, that is, the gap between the back plate 16' and the document reading plate 12, is the gap between the protrusions 23, 23, . . . Since the protruding height is always maintained, the document 10 does not move and the reading accuracy does not deteriorate. In addition, documents do not get jammed and are always kept in a stable state.

In the above embodiment, a protrusion was provided on the fixed document reading plate to maintain a constant gap between the facing plate and the document reading plate, that is, the gap in the document conveyance path. Of course, it is also possible to have a configuration in which the document is provided, or a configuration in which both devices are provided.Furthermore, in the above embodiment, point-like protrusions are provided, but instead of this, belt-like protrusions extending in the document conveyance direction are provided. It may also be a thing.

〔effect〕

As described in detail above, the facsimile device according to the present invention has at least one of the two plate-like members arranged oppositely to form a conveyance path for the document in the document reading section. Protrusions are provided to maintain a large gap between the two plate-like members, thereby preventing the document from moving as it passes through the document reading section, improving reading accuracy, and preventing document jams. Furthermore, the simple structure provided with the protrusions provides excellent effects such as miniaturization and cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a schematic partial side sectional view showing the configuration of the facsimile device according to the present invention, Fig. 2 is a schematic view of the vicinity of the document reading section, and Figs. 3 and 4 are for explaining the operation of the back plate. FIG. 5 is a schematic partial side sectional view showing the configuration of a conventional facsimile device, and FIG. 6 is an explanatory diagram of the reading width for an original with a configuration including two sets of lens systems and two sensors. . DESCRIPTION OF SYMBOLS 1... Original conveyance path, 10... Original, 11... Original reading section, 12... Original reading plate, 16, 16'...
...Back plate, 23, 23...Protrusion, 25...
coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A main body-side plate-like member that forms a document reading window and is fixed to the main body side, and a cover that is pivoted to the main body so that it can be opened and closed and is locked to the main body when the lid is closed. , a facsimile apparatus having a cover-side plate-like member provided inside the cover and facing the main body-side plate-like member to form a document conveyance path, wherein the cover-side plate-like member forms a part of the cover-side plate-like member; a back plate facing the document reading window; a biasing means inserted between the cover and the back plate to bias the back plate toward the main body side plate-like member; and a protrusion formed on the opposite plate-like member side of the main body side and defining an interval between opposing gaps of the document conveyance path.