JPH01200777A - Original reader - Google Patents

Abstract

PURPOSE:To remove an original pressing plate with a simple operation when a device is invert-used and to facilitate the alignment of the original by connecting a space between the original pressing plates to cover the top of an original placing table by the plane connecting means of a plane fastener and the like. CONSTITUTION:The original placing table 3 of an original reader main body 1 is covered by an original pressing body 4 freely attachably and detachably and a copy button 5, the setting button of the number of pieces 6 and an indicator part 7 are provided on the front end part of the original placing table 3. The original pressing body 4 is installed on the original placing holder 3 by a plane fastener 130 and its removal is facilitated. When the device main body 1 is used upon inverting, a member projecting onto the placing surface of the original placing table 3 is eliminated by removing the original pressing body 4 with a simple operation and a good original reading is attained without spoiling the adherence between the original and the original placing table.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a method for irradiating a document placed on a document table with light,
The present invention relates to a document reading device that reads image information of the document by guiding the reflected light to a reading sensor.

(Prior Art) Conventionally, there are many devices in which a document is placed on a document table provided on the top surface of the main body, and image information of the document is read by optical means.

In this type of document reading device, a document presser is usually rotatably provided in a state where it can overlap on the document placing table, so that the document can be brought into close contact with the document placing table.

However, with such conventional document reading devices,
When scanning a part of a document that is larger than the document tray, you must fold the document to ensure that the part you want to read is placed in the correct position on the document tray, which is extremely troublesome. Not only that, but also damage to the manuscript,
This has the disadvantage that the adhesion between the document and the document tray may be impaired, which may prevent good reading. Therefore, when scanning a part of a document that is larger than the document tray, the document should be spread out. One idea is to read the original by placing the original on a flat surface and inverting the main body of the original reading device onto the portion of the original that is desired to be read.

When using a document reading device that can be reversed, open the document holder so that the document mounting table is the top surface of the device (or the bottom surface when reversed). It is designed so that the document can be evacuated from the document table in a state where the document is placed in the original position.

However, since a member is attached to the end of the document mounting table to rotatably lock the document presser, when the main body of the device is turned over and placed on the document, the document and the document There was a problem in that a gap was created between the device and the mounting table, resulting in poor adhesion and poor reading. Further, since the document presser body needs to be in an open state, a part of the document becomes invisible, making positioning difficult.

(Problems to be Solved by the Invention) The present invention solves the problem that, as described above, when the main body of the apparatus is inverted and placed on the original, a gap is created between the original and the original placing table, and the adhesion is impaired. Problems such as not being able to read the
This was done to solve the problem that the document holding member had to be left open, making part of the document invisible and making positioning difficult. An object of the present invention is to provide a document reading device that can perform good reading even when the document is being scanned, and can easily align the document.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a document placing table on which a document is placed, a removable document pressing member that covers the document placing table, and a document holding table and the document placing table. It is characterized by comprising a planar connection means for connecting to the presser member.

(Function) The present invention connects a document holding table and a document holding member covering the top of the document placing table using a planar connection means such as a flat fastener, and makes it possible to remove the document holding member from the document placing table. And since it can be easily installed, when the device is used upside down, the document holding member can be removed with a simple operation, eliminating the gap between the document and the document table. This enables the documents to be brought into close contact with each other, allowing for good reading, and also allows for easy positioning since a portion of the document is not obscured by the document holding member.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows the external appearance of an image forming apparatus (scanner printer) 1 to which the original reading device of the present invention is applied. In the figure, 2 is the main body of the apparatus, and on its upper surface is a document mounting table made of a transparent acrylic plate. The original table (original table) 3 and the original holding member (platen cover) 4 are in a state where they are sequentially superposed. Furthermore, on the front side there is a copy button 5 and a number setting button 6.
．． A display section 7 consisting of seven segments is provided, and a power switch 8 is provided on the left side.

As shown in FIG. 3, the document presser 4 can be opened and closed via a hinge portion 9 formed of a thin wall formed along its rear edge so that it can be retracted from above the document placement table 3. .

As shown in FIGS. 4 and 5, the image forming apparatus 1 also includes a scanner unit section 10 as a reading device for reading image information of a document placed on a document table 3, and a scanner unit section]. The printer unit 11 serves as a recording device that records and outputs the image information read at 0 on recording paper P as a visible image.

The scanner unit section 10 includes a xenon lamp 15 as a light source that illuminates the document tray, a mirror 16 that horizontally reflects the light reflected from the document tray, and a mirror 16 that receives the reflected light reflected by the mirror 16. It has an optical system 19 including a lens 18 that focuses light onto a CCD sensor 17 as a reduction type reading sensor. Also,
The optical system 19 is housed in an optical system accommodating portion 21 formed within a substantially fan-shaped partition frame 20 formed within the housing 2a of the main body 2 of the apparatus. The upper surface side of the optical system housing section 21 is closed by a cover 2b of the apparatus main body 2, and the lower surface side is closed by a light shielding plate 22. A slit 23 for passing reading light formed in the cover 2b is closed. This prevents light from entering from other sources.

Further, in the scanner unit section 10, short components such as the main control board 26 are placed in a short cavity 25 formed on the lower surface side of the optical system housing section 21. Tall parts such as a battery 28 and a motor 29 are accommodated in the tall gap 27 that is shifted from the position of the . Note that 30 (indicated by a two-dot chain line) shown in FIG. 4 indicates a mounting area for electronic components (not shown) to be mounted on the main control board 26.

Further, the printer unit 11 is removably attached to a printer unit accommodating portion 40 formed on the right end side of the apparatus main body 2, and is designed to accommodate the size of the recording paper P (for example, 83
It is possible to replace it with one equipped with an ink ribbon 41 suitable for A6).

The printer unit 11 is placed in a printer unit housing section 40.
When housed in the printer unit accommodating section 40, it is mechanically held in a predetermined position by positioning guide means formed in the printer unit accommodating section 40, and the printer side connector (male connector) 42 protruding from one end thereof is connected to the scanner side connector. By fitting into the (female connector) 43, it becomes electrically connected to the scanner unit section 10.

The printer unit section 11 also includes the connector 42.
A print head (thermal head) 45 is arranged which is connected to the scanner unit 10 side via the print head 45, and a platen serving as both a platen roller and a feed roller is arranged opposite to the heat generating part 45a (not shown in detail) of the print head 45. A feed roller 46 is provided.

Furthermore, an ink ribbon supply means 47 that tensions the ink ribbon 41 with a middle part interposed between the heat generating part 45a of the print head 45 and the platen feed roller 46.
has been incorporated. The ink ribbon 41
is fed out from a feeding side core 48 installed parallel to the platen feed roller 46, and is fed out from a winding side core 49.
It is designed to be wound up. Further, a guide shaft 50 is installed between the platen feed roller 46 and the winding side core 49, and the amount of winding of the ink ribbon 41 on the platen feed roller 46 is constant, and the ink ribbon 41 is folded back. recording paper P
The ink ribbon 41 can be effectively separated from the ink ribbon 41.

In addition, the platen feed roller 46 and the feeding side core 48
A paper insertion port 55 is formed at a position corresponding to the recording paper insertion port 55 , and the recording paper P inserted through the recording paper insertion port 55 is guided by a paper guide 56 between the ink ribbon 41 and the circumferential surface of the platen feed roller 46 . The ink ribbon 41 is guided into a V-shaped space formed by the ink ribbon 41 and is conveyed while being held between the ink ribbon 41 and the platen feed roller 46 as the platen feed roller 46 rotates. Further, the recording paper P that has passed through the heat generating section 45a is separated from the ink ribbon 41 at the guide shaft 50 which also serves as a separating means, and then guided to a paper discharge port 59 by a paper guide 58 and discharged. ing.

Further, a drive mechanism section 60 is incorporated in the apparatus main body 2, which uses the motor 29 as a drive source to reciprocate the document table 3 and drives the platen feed roller 46 and the take-up core 49. It becomes.

That is, the scanner unit section 10 includes a first timing pulley (drive pulley) 65 attached to the drive shaft 29a of the motor 29, as shown in FIGS.
and a second gear 67 interlocked with each other via a timing belt 66, and to which a first gear 67 as a driving gear is integrally attached.
A timing pulley (driven pulley) 68 is rotatably provided.

As shown in FIG. 5, a first drive force transmission system 69 for driving the original platen and a second drive force transmission system for driving the platen feed roller are connected to each other using the first gear 67 as a drive source. A system 70 is provided.

As shown in FIGS. 5 and 7, the first driving force transmission system 69 includes a second gear 71 that meshes with the first gear 67, and a third gear 72 that is integral with the second gear 71. And this third
A fourth gear 73 as a binion meshing with the gear 72 of
The fourth gear 73 is in mesh with a rack 76 attached to a rear movable frame 75 that is connected to the original table 3 via a connecting means 74.

Therefore, when the first gear 67 serving as the driving gear rotates in the direction of the solid line arrow due to the rotation of the motor 29 in the forward direction (the direction of the solid line arrow in FIG. 5), the second gear 67 constituting the first driving force transmission system 69 rotates. The gear 71, the third gear 72, and the fourth gear 73 as a pinion rotate in the direction of the solid line arrow, respectively, and move the rack 76 in the direction of the solid line arrow in FIG.

As a result, the rear frame 78 of the main body is inserted through the slide rail 77.
The rear movable frame 75, which is reciprocatably attached to the rear movable frame 75, and the document mounting table 3, which is connected to the rear movable frame 75 through a connecting means 74, move back and forth.

Furthermore, when the first gear 67 serving as the driving gear rotates in the direction of the broken line arrow due to the rotation of the motor 29 in the opposite direction (the direction of the broken line arrow in FIG. 5), the second gear 67 constituting the first driving force transmission system 69 rotates. The gear 71, the third gear 72, and the fourth gear 73 as a pinion rotate in the direction of the dashed arrow, and the rack 7
6 in the direction of the dashed arrow in FIG.

As a result, the rear frame 78 of the main body is inserted through the slide rail 77.
The rear movable frame 75, which is reciprocatably attached to the rear movable frame 75, and the document mounting table 3, which is connected to the rear movable frame 75 through the connecting means 74, move back.

Further, the second driving force transmission system 70 for driving the platen feed roller includes a fifth gear 80 that meshes with the first gear 67 as the driving gear, as shown in FIGS. 5 and 8. , this fifth gear 80 and the ratchet type one-way clutch 8], and the third timing pulley 82 and the fourth timing pulley 82 and the second timing belt 83. a timing pulley 84, a first helical rain bevel gear 85 that is integrated with this fourth timing pulley 84, a second helical rain bevel gear 86 that meshes with this first helical rain bevel gear 85, and this fourth timing pulley 84; A fifth timing pulley 87 integrated with the second helical bevel gear 86
, a sixth timing pulley 89 interlocked with this fifth timing pulley 87 and a third timing belt 88 , and a seventh timing pulley 89 integrated with this sixth timing pulley 89 .
The seventh timing pulley 90 and the fourth timing belt 91 interlock with each other, and the drive shaft 46 of the platen feed roller 46
The eighth timing pulley 92 is fitted into the timing pulley 92a.

When the first gear 67 serving as a driving gear rotates in the direction of the solid line arrow due to the rotation of the motor 29 in the forward direction (the direction of the solid line arrow in FIG. 5), the fifth gear 80 meshing with the first gear 67 rotates in the direction of the solid line arrow.
rotates in the direction of the solid line arrow, and this rotational force is transmitted to the third timing pulley 82 via the one-way clutch 81. Furthermore, a second timing belt 83, a fourth timing pulley 84, a first helical rain bevel gear 85, a second helical rain bevel gear 86, a fifth timing pulley 87, a third timing belt 88, a sixth timing pulley 89, seventh timing pulley 90, fourth timing belt 9
] are sequentially activated to transmit the eighth timing ]B to the pulley 92.

This causes the platen feed roller 46 to move in a predetermined direction (
It will rotate in the direction of the arrow in FIG. At this time, the document placing table 3 is in the forward movement process of scanning the document tray via the first driving force transmission system 69 described above.

In addition, in order to move the original table 3 backward, the motor 29 is operated in the opposite direction (
When the first gear 67 as a driving gear rotates in the direction of the broken line arrow in FIG. The movement of the directional clutch 81 is not transmitted to the third timing pulley 82, so that the platen feed roller 46 and the four winding-side cores do not rotate in the opposite direction.

Further, the fifth gear 80 is a gear biasing means described later]
00, the first gear 67 as a driving gear is elastically engaged with the first gear 67 as a driving gear, and the driving force can be effectively transmitted to the printer unit section 11 which is detachable from the apparatus main body 2. It looks like this. That is, as shown in FIGS. 8 and 9, the printer unit section 11 is provided with an arm 102 that is rotatable about a pivot shaft 101, and the fifth arm is attached to one end of this arm 102. A gear 80 is installed coaxially with a one-way clutch 81, a third timing pulley 82, and the like. Moreover, the first helical rain bevel gear 85 and the fourth
The timing pulley 84 and the like are provided coaxially.

On the pivot end side of the arm 102, one end is connected to a spring receiving portion 14.
' 10 B is connected to the other end of the tension spring 104, and the fifth gear 80 is the printer unit part].

It is in a state where it is constantly biased in the direction of protruding outward from an opening (not shown) formed in the housing 1.05 of No. 1 (in the direction of the arrow in FIG. 9).

Further, as shown in FIG. 10, a seventh timing pulley 90 is connected to the winding-side core 49 for winding the ink ribbon 4 through a third driving force transmission system 110 for the winding-side core.
rotational force is transmitted.

The third driving force transmission system 110 has the following configuration. That is, a disk 113 having a felt 112 is rotatably provided on a shaft 111 that rotatably supports the sixth and seventh timing pulleys 89, 90. This disk 113 and the end of the seventh timing pulley 90 are connected via a truncated conical compression spring 114, and the seventh timing pulley 90
The rotational force is applied to the disk 113 via this compression spring 114.
At the same time, the felt 112 is constantly biased so as to come into pressure contact with the disk 115 press-fitted into one end of the winding-side core 49.

Thus, the rotational force of the seventh timing pulley 90 is transmitted to the disk 113 equipped with the compression spring 114 and the felt 112, and further transmitted to the disk 115 by the frictional force between the felt 112 and the disk 115,
The winding-side core 49, which is integral with the core 15, is rotated.

The rotational speed of the winding-side core 49 at this time is = 16
- It is set to be faster than the platen feed roller 46, and even when the winding amount of the ink ribbon 41 on the winding side core 49 is small and the circumferential speed is slow, the ink ribbon 4
1 can be wound up without loosening it. At this time, when a predetermined tension is applied to the ink ribbon 41, the felt 112 and the disk 1
15, so that rotational force is not transmitted to the winding-side core 49. In addition, 1 in Figure 10
16 is a support member, 117 is an ink ribbon holder, 1]8
is a stopper for preventing the disc 113 from coming off.

Further, as shown in FIGS. 5 and 11, one lens 18 of the optical system of the scanner unit section 10 is connected to the partition frame 2.
[0 etc. rib] 20... is housed in a U-shaped lens storage recess 121, and is fitted with a screw 122.12.
The pressing is fixed by the leaf spring attached by 2]-23.

Further, as shown in FIG. 1, the document presser 4 that covers the document placement table 3 has a first fastener 1-- which is made of a loop-shaped portion.
30 a and a second fastener 13 consisting of a hook-shaped portion
It can be attached and detached extremely easily by a flat fastener made of 0b, so-called velcro tape (velcro tape) 130.

When the original holding plate 4 is removed, the original placing table 3 forms the uppermost surface of the main body 2 of the apparatus. In the case of a document tray larger than the document table 3, the image forming apparatus 1 can be used by inverting the image forming apparatus 1 with the document presser 4 removed, as shown in FIG.

Further, as shown in FIGS. 13 and 14, the rear end frame portion of the frame member 135 of the document placement table 3 is connected to the rear movable frame 75 via the hinge 136, and this document The table 3 is rotatable as shown in FIG. 14. As shown in FIG. 15, when the image forming apparatus 1 is used upside down, it is possible to align the document placement table 3 to a predetermined position on the document tray while visually observing the document tray. Further, a scale 137 is provided around the document mounting table 3, so that alignment with a document matching the size of the recording paper P can be performed extremely easily.

Further, the front edge side (free end side) of the document placement table 3 is slidably supported on the upper surface of the apparatus main body 2 via a support means 138, and the pivot end side is on the side of the document placement table 3. The magnetic body 139 and the rear movable frame 75 provided in
The flatness with respect to the apparatus main body 2 is maintained by suction means 141 consisting of a magnet 140 attached to the horizontal piece of the apparatus.

Next, the handling and operation of the image forming apparatus 1 configured as described above will be explained.

First, if the document tray is of a size (A3 to A6 size) that can be placed on the document tray 3, the document tray 3 is placed in the normal usage state with the document tray 3 on top as shown in FIG. The document placed on top is held down by the document presser 4, and the recording paper P is set in the printer unit section 11.

After setting the number of copies using the number setting button 6, the user presses the copy button 5. As a result, first, the drive mechanism section 6
0 motor 29 once rotates in the reverse direction (rotates in the direction of the dashed arrow in FIG. 5), and the rotational force is transmitted to the six first power transmission systems for the original table (see FIGS. 5 and 7). This action is converted into a backward motion of the document placement table 3, and the document placement table 3 moves to the start position.

Next, the xenon lamp 15 of the optical system 19 of the scanner unit 10 is turned on, and the motor 29 of the drive mechanism section 60 rotates in the forward direction (in the direction of the solid line arrow in FIG. 5), and its rotational force is applied to the first Due to the action of the power transmission system 69, the document placing table 3 is converted into a forward movement, and the document placing table 3 starts to move forward. As a result, the image surface of the document is scanned, and the reflected light is sent to the CCD sensor 17.
The image signal is photoelectrically converted and sent to the printer unit section 11.

On the other hand, in the printer unit section 11, the drive mechanism section 6
Second driving force transmission system 7 for platen feed roller 0
0 (see FIGS. 5 and 8), the platen feed roller 46 rotates, and the recording paper P and the ink ribbon 41 are rotated.
is sent at a predetermined speed, a group of heating elements (not shown) of the heating section 45a of the print head 45 selectively generates heat, and recording corresponding to the image information on the recording paper P, that is, copying is performed. It turns out.

Note that the recording paper P and the ink ribbon 41 are separated by a guide shaft 50 serving as a separating means, and the recording paper P
is discharged from the paper outlet 59, and the ink ribbon 41 is wound onto the rotating take-up core 49 via the third power transmission system 110 for the take-up core (see FIGS. 5 and 10). taken.

When copying of the original is completed in this way, the xenon lamp 15 is turned off, the motor 29 of the drive mechanism section 60 is rotated in the opposite direction, and the original placing table 3 is moved back so that it overlaps the main body 2 of the apparatus. He will return to Pojinyong.

In addition, if the document tray is thick such as a book, the document presser 4 should be left open as shown in FIG. 3, or the document presser 4 should be left open as shown in FIG. It will be used with 4 removed.

In addition, when reading a part of a document plate larger than the size of the document table 3, first remove the document presser 4 as shown in FIG.
As shown in FIG. 2, the original is placed on the original plate, and in this state, the original plate is copied.

In this way, the original holding body 4 is attached to the original placing table 3 by the plane fastener 130, and can be removed very easily. Therefore, when the image forming apparatus 1 is used upside down, by removing the document presser 4 with a simple operation, there is no member protruding above the placement surface of the document tray 3, so that the document tray and the document tray 3 can be easily removed. The adhesion is not impaired and good reading is possible. Furthermore, by removing the document presser 4, it is no longer possible for a part of the document sheet to become invisible on the document presser 4, making it easier to align the part you want to read. It is also easy to handle.

Furthermore, when used in reverse, the document table 3 remains in close contact with the surface of the document, as shown in FIG.
The sides are designed to move.

Therefore, copying can be performed without folding the original. Therefore, compared to the conventional case of folding and setting the original paper, the work is much easier, and it also prevents damage to the original paper or poor reading due to loss of adhesion between the original paper and the original table 3. You can prevent it from inviting them.

In addition, in such a state of use, alignment with the document tray can be easily performed by visually observing from the back side of the document placement table 3 as shown in FIG. This facilitates positioning that corresponds to the size of the recording paper P.

Although the reading device of the present invention has been described as being integrated with a printer unit as a recording device, the present invention is not limited to this, and it goes without saying that it may be used alone.

In addition, it goes without saying that the present invention can be modified in various ways without departing from the gist.

[Effects of the Invention] As explained above, according to the present invention, the document mounting table;
The document holding member that covers the top of the document placing table is connected to the document holding member using a plane fastener, and the document holding member can be easily removed and attached to the document placing table, so that the device can be used inverted. To provide a document reading device which can bring a document and a document table into close contact with each other by sometimes removing a document holding member, thereby enabling good reading and facilitating alignment of the document. I can do it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view showing the state in which the document holder is separated from the main body of the apparatus, and Fig. 2
3 is a perspective view of the document holder in an open state, FIG. 4 is a schematic front view showing the internal mechanism, FIG. 5 is a schematic plan view showing the internal mechanism, and FIG. Figure 6 is a diagram of the configuration of the drive source side of the drive mechanism unit as seen from the rear side, Figure 7 is a schematic side view showing the drive force transmission system for the document table of the drive mechanism unit, and Figure 8 is the drive mechanism. FIG. 9 is a schematic side view showing a driving force transmission system for the platen feed roller in FIG. FIG. 11 is a side view showing how the lens is mounted; FIG. 12 is a side view showing the image forming apparatus in reverse use; Figures 13 and 14 are schematic side views showing the state in which the document mounting table is installed; Figure 15 is a perspective view showing the alignment state with the original when used in reverse;
FIG. 6 is an explanatory diagram schematically showing the operating state during inversion use. 2. Apparatus main body, 3.. Original placing table, 4.. Original holding body (original holding part IJ'), 10. Reading device (scanner unit l-), 11.. Recording device (printer unit h), 1.
30a-first fastener, 130b-second fastener, 130...plane fastener (plane connection means)
, D... Manuscript. Applicant's agent Patent attorney Takehiko Suzue Figure 16

Claims (1)

[Scope of Claims] A document mounting table on which a document is placed, a removable document holding member that covers the document placing table, and a planar connection means for connecting the document placing table and the document holding member. A document reading device characterized by: