JPH0481744A - Image reader - Google Patents

Abstract

PURPOSE:To visually confirm whether or not a document is at a specific position and correct the position while a document pressing means is closed by providing the document pressing means with a window part which can open and close a specific area, where part of a document mount means is visible, freely and partially. CONSTITUTION:The window part 13 which can freely be opened and closed in the same direction so that part of a transparent member 2 as the document mount means can be viewed is provided to the opening part 5c in the specific area of the top plate 5a of a cover 5. When read operation (trimming, etc.) wherein the mount position accuracy of a document H is required is performed, the window part 13 is opened while the document pressing means 4 is held closed and the mount state of the document H can be observed visually. Then if the document H deviates from a specific read position, a dial 10 is rotated while the document pressing means 4 is held closed, and the document is released from being pressed by a pressing part 6 and then corrected. Thus, whether or not the document H is at the specific read position can be confirmed visually and the position is corrected while the document pressing means 4 is held closed, so the operation efficiency is extremely good.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an image reading device, such as a copying machine, an image scanner, etc., that reads an image of a document placed on a reading position of document placement means.

(Prior Art) As shown in FIG. 9, a conventional image reading apparatus such as a copying machine or an image scanner has a document mounting means 101 made of a transparent member such as glass on the upper surface of a main body 100 of the apparatus. An index 102 is provided on the document placement means 101 as a document placement reference when placing the document G at a predetermined reading position. Reference numeral 103 denotes document holding means configured to be openable and closable relative to the document placing means 101 as shown by the arrow. This document holding means 103 is composed of a cover 104 made of molded plastic or the like, an elastic member 105 made of maltbrene or the like, and a pressure bonding part 106 made of a white sheet or the like.

In the image reading device configured as described above, the original G is placed on the original placing means 101 at a predetermined reading position in alignment with the index 102, and the original G is pressed by closing the original holding means 103. It is held at the reading position by the section 106. This document G is scanned and read by a known optical means (not shown) provided in the apparatus main body 100, and an image on the surface of the document G is formed on a photoreceptor or an image sensor.

(Problem to be Solved by the Invention) However, in the above conventional example, the original holding means 1
The document G may be deviated from the predetermined reading position due to the wind generated when closing the cover 03, which may result in poor or unreadable reading.

Here, the influence is particularly large when a portion of the document G is trimmed, read, and processed.

In such a case, in order to read the image normally, you must first open the original holding means 103, place the original G again, and then carefully close the original holding means 103 again (slowly to avoid creating wind). Therefore, the efficiency of the position correction work for document G was poor.

The present invention is intended to solve the above-mentioned problems, and provides an image reading device that can visually check whether the document is at the reading position and perform position correction work while the document holding means remains closed. It is intended to.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a document placing means for placing a document at a predetermined reading position, and a document placing means for holding the document at the reading position. In the image reading apparatus, the document holding means is provided with a window portion that can be partially opened and closed in a specific area through which a part of the document placing means can be visually viewed.

It is preferable that the specific area is an area where at least a part of the document placement reference formed on the document placement means can be visually observed.

Further, it is preferable that the document holding device is provided with a pressure-bonding portion that can be selectively switched between a first position, which is pressure-bonded to the document placement device, and a second position, which is remote from the document placement device.

Furthermore, the switching means for switching the pressure bonding section between the first position and the second position may be provided in the original holding means or in the main body of the apparatus including the original placing means.

(Function) The function of the present invention based on the above configuration is such that even when a document is placed on the reading position of the document placement device and the document holding device is closed,
By opening the window, you can visually check whether the document is in the reading position, and if it is out of position, you can correct the position of the document by inserting your finger through the window while keeping the document holding means closed.

Furthermore, at least a part of the document placement reference can be visually observed through the open window, and it can be confirmed whether or not the document placement reference matches the document.

In addition, the crimping part provided on the document holding means can be freely switched between crimping and separating from the document placing means, and when the crimping part is in the second position, it creates frictional resistance that tries to hold the document in the reading position. is canceled.

Further, the crimp section is switched between the first position and the second position by operating the document holding means or the switching means provided on the apparatus main body.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 8.

1 to 3 show an image reading device such as a copying machine or an image scanner according to a first embodiment.

In FIG. 1, reference numeral 1 denotes the main body of the apparatus, and at the top of the main body 1, a transparent member (original placing means) 2 made of glass or the like is provided horizontally, and an index 3 is provided as a reference for placing the original. Reference numeral 4 denotes document holding means for holding the document H placed on the transparent member 2 at a predetermined reading position.
It is completely assembled. The reading position of the original H is set by aligning it with the index 3, but if there is no index, the reading position of the document H is set by aligning it with the index 3.
The setting can also be made by matching the corner of the document H with the corner of the document H. The document holding means 4 is composed of a cover 5 made of molded plastic or the like, and a pressure bonding part 6 provided inside the cover 5.

The compression bonding part 6 is made by sequentially bonding a substrate 7, an elastic member (such as maltbrene) 8, and a white sheet 8a. Further, the crimping part 6 is configured to be able to selectively switch between a first position in which it is crimped to the transparent member 2 and a second position away from the transparent member 2 when the document holding means 4 is closed. . cover 5
A tension spring 9 is provided between the upper plate 5a and the substrate 7, and a force that constantly tries to pull up the crimp part 6 upward in the figure and store it in the cover 5, that is, an even-odd force is acting. .

Further, in a circular insertion hole 5b provided approximately in the center of the upper plate 5a of the cover 5, a dial 10 serving as a switching means for switching the crimp portion 6 between the first position and the second position is rotatable in the horizontal direction. It can be set freely. A male thread (not shown) is formed in the cylindrical portion 10a provided at the lower part of the dial 1o.

Further, an annular nut plate 11 having a female thread (not shown) on the inner peripheral surface is fixed on the upper surface of the substrate 7 at a position corresponding to the dial 10, and the female thread has a male thread of the dial 10. are mated. Furthermore, nut plate 11
A vertical guide hole 11a is provided in the guide hole 11a.
A guide bin 12 hanging down from the cover 5 is inserted into the hole a. Therefore, the nut plate 11 can slide vertically in the figure along the guide bin 12, but cannot rotate horizontally.

2 and 3 are perspective views of the original holding means 4, showing a window 13 that can be opened and closed in the same direction as the original holding means 4 so that a part of the transparent member 2 can be viewed. This window part 13
is provided in the opening 5C in a specific area of the upper plate 5a of the cover 5. The specific area refers to a position where a corner of the document H placed on the transparent member 2 can be viewed, preferably a position where the transparent member 2 and at least part of the indicator 3 can be viewed simultaneously.

Next, the operation of the above embodiment will be explained.

First, open the document holding means 4, place the document H on the transparent member 2 at a predetermined reading position in alignment with the mark 3, and then close the document holding means 4. The document H to be read is held at the reading position. and,
An optical means (not shown) in the apparatus main body 1 scans and reads an image on the document surface. Note that the distance between the device main body 1 and the cover 5 is maintained at a predetermined value by a stopper of a known hinge means (not shown).

Normally, this operation is all that is needed, but when performing reading work (trimming, etc.) that requires precision in the placement position of the document H, keep the document holding means 4 closed, hold the hook 14, and press the window 13. When opened as shown in FIG. 3, the state in which the document H is placed can be visually observed. If it is found that the document H has deviated from the predetermined reading position, the position correction work is performed as follows.

When the dial 10 is rotated in a predetermined direction by 90° with the document holding means 4 closed, the nut plate 11 is rotated due to the fact that the male thread of the cylindrical portion 10a and the female thread of the nut plate 11 are fitted and the even-odd force of the tension spring 9 Slide upward in the figure along the guide bin 12. The cover 5 is prevented from lowering by the aforementioned stopper. Then, the crimping part 6 switches to the second position, and the pressing force against the document H, that is, the frictional resistance, is released, so the operator inserts his finger through the opening 5C and moves the document H to the predetermined reading position. It can be repositioned correctly. Thereafter, when the dial 10 is rotated by 90 degrees in the opposite direction to that described above, the crimp section 6 returns to its initial first position, so it is sufficient to close the window section 13 and perform a predetermined image reading operation.

As described above, in the present invention, it is possible to visually check whether the document H is at a predetermined reading position and to correct the position while keeping the document holding means 4 closed, resulting in very high work efficiency.

Note that in the above embodiment, the window portion 13 is connected to the document holding means 4.
Although the opening/closing direction is the same as that of the opening/closing direction, the opening/closing direction is not limited to this, and the opening/closing direction may be perpendicular to the opening/closing direction of the document suppressing means 4.

FIG. 4 shows another embodiment of the window section. The circular window portion 15 is
It is configured to be detachable from the circular opening 17 of the cover 5 of the document holding means 4. That is, the operator presses the knob 16.
The window part 15 can be removed by grasping it. A part of the transparent member 2 including the indicator 3 is visible through the opening 17.

Other functions and effects of Structure 1 are the same as those in FIGS. 2 and 3.

FIG. 5 shows a second embodiment of the invention.

In FIG. 5, the document holding means 4 is located inside the cover 5.
It has a crimping part 6 that can be switched between a first position and a second position. The crimp portion 6 is made by sequentially joining a substrate 18 made of a magnetic material, an elastic member 8, and a white sheet 8a. It is configured to be able to move up and down with respect to the cover 5, and is normally pressed against the transparent member 2 by its own weight (first position).In addition, an electromagnet 19 is placed inside the cover 5, facing the substrate 18. Further, the end of the substrate 18 is inserted into a guide hole 18a provided in the cover 5.

In the above configuration, if the operator recognizes the need to correct the placement position of the document H (by opening the window (not shown)), he/she turns on a switch (○N) (not shown) and the electromagnet 19
is energized and the substrate 18 is attracted. That is, the crimping portion 6 is displaced from the state in which it is crimped to the document H (first position) to the non-crimped state (second position). Therefore, the operator can put his/her finger through the window to correctly place the document H at a predetermined position. Thereafter, when the switch is turned off, the crimp portion 6 will again be displaced to the first position by its own weight.

6 to 8 show a third embodiment of the present invention. In FIG. 6, the document holding means 4 has a crimping portion 6 on the inside of the cover 5. As shown in FIG. The pressure bonding unit 6 has a substrate 20, an elastic member 8, and a white sheet 8a bonded in sequence,
It is configured so that it can be freely switched between the first position and the second position by closing the cover, and is normally pressed against the document H by its own weight. Note that the end of the substrate 20 is inserted into the guide hole Oa of the cover 5. On the other hand, a cam 21 is disposed in the main body 1 of the apparatus and can be retracted from an opening 23 around the transparent member 2 .

That is, as shown in FIG. 7, four cams 21 emerge and retract from an opening 23 by operating a switching lever (switching means) 22 provided on the top surface of the device main body 1.

FIG. 8 shows only the main parts of the retracting mechanism. The cams 21 are fixed to the ends of two shafts 24 that are supported in parallel by bearings (not shown), with their phases being the same. A lever 26 is swingably disposed on the fixed fulcrum shaft 25, and one end of the lever 26 is pin-jointed to a switching lever 22 that is slidable in the direction of the arrow. Further, the other end of the lever 26 is fixed to one of the cams 21 by a connecting rod 26a. Further, the cams 21 located on the opposite side of the switching lever 22 are connected by a link 27. In addition,
Although not particularly shown, the cover 5 is provided with a window similar to that described above.

In the above configuration, when the operator recognizes the need to correct the document placement position by opening the window, he slides the switching lever 22 in the direction of arrow A. Then, the fallen cam 2
1 rotates around the shaft 24, stands up as shown in FIG. 8, protrudes from the opening 23, and pushes up the substrate 20 (FIG. 6).

That is, the crimping portion 6 is displaced from the first position to the second position where it is not crimped. Therefore, the operator can correctly place the original at a predetermined position.

Thereafter, the switching lever 22 is slid in the direction of arrow B. Then, the cam 21 is retracted into the opening 23, and the crimp portion 6 is again displaced to the first position.

(Effects of the Invention) Since the present invention is configured as described above, it is possible to visually check whether the document is at a predetermined reading position and to correct the position while the document holding means is closed. Good work efficiency.

[Brief explanation of the drawing]

1 to 8 show embodiments of the present invention, FIG. 1 is a longitudinal sectional view showing the first embodiment, FIGS. 2 and 3 are perspective views of the original holding means in the same embodiment, and FIG. FIG. 4 is a perspective view showing another example of the structure of the window portion, FIG. 5 is a partial longitudinal sectional view of the second embodiment, FIG. 6 is a longitudinal sectional view of the third embodiment, and FIG. FIG. 8 is a perspective view of the apparatus body in the embodiment, FIG. 8 is a perspective view showing a cam retraction mechanism in the same embodiment, and FIG. 9 is a perspective view of a conventional image reading device. Explanation of symbols 1... Apparatus main body 2... Transparent member (original placement means) 3... Indicator (original placement reference) 4... Document holding means 6... Crimping section 10... Dial (Switching means) 13, 17... Window 22... Switching lever (switching means) H... Manuscript Figure 4

Claims (5)

[Claims] (1) In an image reading device having a document placing means on which a document is placed at a predetermined reading position, and a document holding means provided to be openable and closable with respect to the document placing means to hold the document at the reading position, An image reading device characterized in that the document holding device is provided with a window portion that can partially open and close a specific area through which a part of the document placing device can be viewed. (2) The image reading device according to claim 1, wherein the specific area is an area where at least a part of the document placement reference formed on the document placement means can be visually observed. (3) The original holding means is provided with a crimping part that can be selectively switched between a first position crimped to the original placing means and a second position remote from the original placing means. 2. The image reading device according to 2. (4) The image reading device according to claim 3, wherein the document holding means is provided with a switching means for switching the crimping part between the first position and the second position. (5) Claim 3, wherein a switching means for switching the crimping part between the first position and the second position is provided in the main body of the apparatus including the original placing means.
The image reading device described in .