JPH0534261B2 - - Google Patents

Description

Detailed Description of the Invention <Technical Field> The present invention relates to a device for conveying and reversing sheet materials such as copy paper, transfer paper, and original documents to be read, and particularly to a device for conveying and reversing sheet materials such as copy paper, transfer paper, and original documents to be read. The present invention relates to a device for gripping, conveying, and reversing a sheet material for reliably reversing the front and back sides.

<Prior Art> Conventionally, as a device for conveying and reversing a sheet material such as a sheet of paper or a manuscript, it is common to use a device that pinches the sheet material with a pair of rollers and passes through a complicated conveyance path. However, since devices using this method utilize roller friction and require a complicated conveyance path, they tend to damage the sheet material and often stain the surface. In addition, it is easy to slip on art paper or coated paper with a low surface friction coefficient, and furthermore, it is easy to cause operational errors due to a decrease in the friction coefficient caused by paper dust or changes in the roller material over time. Not only is it easy for meandering to occur due to unbalanced roller shapes during the conveyance process, but also static electricity is likely to be generated due to the complicated path as described above, and troubles due to charging of the sheet material occur frequently. It has its drawbacks. Furthermore, it is difficult to avoid increasing the size of the device due to the construction of a more complicated route.

<Objective of the Invention> In view of the above-mentioned drawbacks, the present invention provides a sheet material that does not stain or damage the sheet material, and because the conveying process for reversing the document is very simple, it is difficult to charge, and To provide a small and highly reliable document reversing device which can prevent operation errors due to charging by using a reversing auxiliary bar having a charge eliminating material during reversing operation even if it is slightly charged.

<Embodiment> The document reversing device of the present invention will be described in detail below with reference to the drawings showing an embodiment of the present invention.

FIG. 1 is a schematic perspective view of a document reversing device according to the present invention, FIG. 2 is a partial sectional view of the document reversing device according to the present invention, FIG. 3 is a partial side view of the document reversing device according to the present invention, and FIG. 4 is a document according to the present invention. FIG. 5 is a partial side view of a document reversing auxiliary bar constituting a part of the reversing device, and is an explanatory view for explaining the operation of the present invention. Identical parts are given the same reference numerals.

Reference numeral 1 in the figure indicates a base plate of the document conveying device, and two frames 2 and 3 connected to stays 35 and 36 are provided on the base plate 1. At the top of the frames 2 and 3, there is a first arm 5 supported by first arm support shafts 4 and 4' (see Fig. 2).
is provided.

A rotating member (not shown) is provided inside the first arm 5 via a plurality of bearings 80, and the rotating member includes a shaft fixing plate 53 for mounting the alignment support shaft 52, and a gear mounting plate. A pipe 55 is attached, and a main shaft support block 16 is provided via a bearing 50 to an alignment support shaft 52 attached to the shaft fixing plate 53.
The main shaft 11 passes through the inside of the main shaft support block 16 via a bearing 51, and a solenoid mounting pipe 56 is provided on the outside of the main shaft 11 so as to be connected to the main shaft support block 16.

Next, reference numerals 9 and 10 indicate document gripping plates, each of which has elastic friction members 61 and 62 on the inner side of its leading end for gripping the edge of the document. The document gripping plates 9 and 10 are attached to the main shaft 1 via gripping plate fixing blocks 12 and 13, respectively, in order to be able to rotate around the main shaft 11.
It is rotatably provided around 1. The upper document gripping plate 9 is fixed together with a clutch 15 (pillar) and a main shaft support block via a gripping plate fixing block 12, and the main shaft 11
It is formed perpendicularly to the On the other hand, the lower document gripping plates 10 _-1 , 10 _-2 , and 10 _-3 are attached to the main shaft 11 via gripping plate fixing blocks 13, and are completely independent of the rotational movement of the main shaft 11. It is designed to be freely rotatable. The original gripping plates 9 and 10 are located at the inner depths between the lower original gripping plates 10 _-1 , 10 _-2 , 10 _-3 and the upper original gripping plate 9 so that they are closed in their free state. A plurality of spring members 71 are formed to extend around the document gripping plates 9 and 10, and are biased by a constant force to bring the elastic friction parts 61 and 62 formed at the tips of the document gripping plates 9 and 10 into contact with each other. .

Further, both document gripping plates 9 and 10 are connected to the main shaft 1 by gripping plate fixing blocks 12 and 13, respectively.
Although the main shaft 11 is positioned at a predetermined position on the main shaft 11, a plurality of stoppers 14 are integrally formed on the shaft of the main shaft 11 to regulate the position so as to prevent the entire shaft from shifting in the axial direction during operation. . Further, the main shaft 11 having the document gripping plates 9 and 10 includes the aforementioned main shaft support block 16, the clutch 15 serving as its support, and the solenoid mounting pipe 5.
6 and grip plate fixing blocks 12 and 13 through a plurality of bearings 51 so as not to be affected by the main shaft 11, and the main shaft support block 16, clutch 15, and solenoid are mounted. Pipe 56, grip plate fixing blocks 12, 13, and main shaft 1
1 is a latch mounting unit 2 connected and fixed to the stopper 14 and the end 57 of the main shaft 11.
7 to prevent displacement in the axial direction.

The main shaft 11 has an end portion 57
The solenoid 23 is attached to the solenoid 23 via a latch 26 and a latch attachment unit 27 connected and fixed to the solenoid attachment pipe 5.
The latch 2 is attached to the solenoid mounting plate 24 fixed to the
6. Through the latch mounting unit 27, the rotational movement of the main shaft 11 is converted and the main shaft 1 is rotated by a certain angle proportional to the operating amount of the solenoid.
1 will rotate. This rotational movement causes the grip plate opener, which is integrally attached to the main shaft 11, to move the lower document grip plate 10 _-1 ,
A spring member 71 is formed in contact with the inside of each of the document gripping plates 9 _and 10 when the main shaft ₁₁ rotates.
The original gripping plates 10 _-1 , 10 _-2 , 10 _-3 on the lower side are separated by a certain amount from the upper original gripping plate 9 against the force of the original gripping plate 9 to open the original gripping plate. That is, the ON/OFF operation of the solenoid 23 causes the document gripping plate 9, 10 _-1 , 10 _-2 , and 10 _-3 to perform opening/closing movements (indicated by arrow C in the figure). Next, the main shaft 11 connected to the main shaft support block 16 and the document gripping plates 9 and 10 provided through the main shaft 11 and the bearing 51.
_-1 , 10 _-2 , 10 _-3 , the clutch 15, the solenoid mounting pipe 56, etc. are located within a certain range around the alignment support shaft 52 attached to the shaft fixing plate 53 via the bearing 50. It is configured to move in the direction of arrow D, and its driving source is an alignment motor 2.
It is 2. This alignment motor 22 is connected to an alignment motor mounting block 3 attached to a gear mounting pipe 55.
It is attached to an alignment motor mounting plate 33 provided at 1, and an alignment cam 45 and a slit 85 for detecting the position of the alignment cam are provided at the tip of the output shaft.

On the other hand, an alignment cam follower 28 is attached to the solenoid mounting block 32 via a follower mounting plate 29, and is brought into contact with the alignment cam 45 by a spring 40. , arrow D in the figure is driven by the alignment motor 20.
A movement in the direction will be made.

Next, each of the above series of component groups is connected to the first
The arm 5 is configured to rotate within a certain range in the direction of arrow B in the figure via a bearing 80 provided inside the arm 5. This drive source is a motor 17 for rotating the document gripping plate, and the motor 17 is connected to the first arm 5.
A motor mounting plate 25 for rotating the document gripping plate fixed to
A worm (not shown) provided on the output shaft is connected to a worm wheel 80 fixed to the gear mounting pipe 55, and its rotation range is within the timing range also fixed to the gear mounting pipe 55. It is controlled based on a signal from a sensor 8 attached to the first arm 5 through the slit 7.

As described above, when the document gripping plate rotation motor 17 is driven, the alignment motor 22 and the solenoid 23
The original holding plates 9 and 10 _-1 , 10 _-2 , and 10 _-3 move simultaneously.

Next, the first arm 5 is connected to the first arm support shafts 4 and 4'.
It is provided so as to be rotatable within a certain range in the direction shown by arrow A in the figure, with the fulcrum being a fulcrum, and its driving source is a motor 6, which is attached to a motor mounting plate 68 on the base plate 1. has been done. The first arm 5 is controlled and driven based on a signal from a sensor 21 via a timing slit 20 and a signal from a switch (not shown) provided on a stay 35 via a gear train (not shown) provided on the frame 3. be done. In addition, the above timing slit 2
0 is provided coaxially with a gear (not shown) via the gear train, and the sensor 21 is provided on the base plate 1.

Therefore, from the above, the alignment motor 22 and solenoid 23 that drive the motor 6 as well as the document gripping plate rotation motor 17 also rotate at the same time.

As described above, all the mechanisms for performing the operations indicated by arrows A, B, C, and D in the figure are provided on the base plate 1, and this base plate 1 is moved by the transport motor 90 as shown by the arrows. It will be moved in the E direction.

First, a slider 60 having a plurality of bearing members 38 therein and a plurality of bearing rollers 65 are provided at the bottom of the base plate 1. The slider 60 is provided on a sliding shaft 70 which is fixed to an external frame (not shown) via a bearing member 38, and a driving wire 100 is attached to the lower part of the slider 60. On the other hand, the bearing roller 65 is configured to be able to freely rotate on a guide rail 75 which is also fixed to an external frame or the like. The drive wire 100 is passed around a main pulley 91 attached to the transport motor 90 via a plurality of auxiliary pulleys 95, a tension pulley (not shown), etc., and transmits the movement of the transport motor 90. . At this time, the movement of the entire document conveyance device in the direction of arrow E is controlled by a timing slit (not shown) provided on the output shaft of the conveyance motor 90 based on signals from a sensor (also not shown) and signals from a plurality of switches. There is.

Further, reference numeral 102 denotes a reversal assisting bar, which protrudes from the side opposite to the document gripping portion, as shown in the figure. As shown in FIG.
A static eliminating brush 110 is rotatably provided on the 9.

Next, the operation of the document reversing device of the invention constructed as described above will be explained with reference to FIGS. 1 and 5.

FIG. 5 shows the steps of a document reading device as an embodiment using the document reversing device according to the present invention. In FIG. 5, reference numeral 67 indicates the upper surface of the platen glass, and reference numeral 105 indicates a document suction device that pulls up the document to a predetermined paper feeding position by, for example, air suction. Further, reference numeral 88 indicates the tip end portions of the document gripping plate 9 and 10 _-1 , 10 _-2 , 10 _-3 , and P indicates a sheet-like paper (original) to be conveyed.

After first setting the mode for single-sided or double-sided scanning of the original, an instruction is given to start reading the original. First, the process for single-sided scanning will be explained.

When an instruction is given to start reading a document, the document suction device 10
5 pulls up the document P to a predetermined paper feeding position shown in FIG. 5a. At this time, the document conveyance device is in the standby position and is not in operation.

Next, after confirming that the document P has been lifted up by the document suction device 105, the first arm 5 and the document gripping plates 9 and 10 _-1 , as shown in FIG.
At 10 _-2 and 10 _-3 , the document conveying device is moved so that the tip 88 of the document gripping section approximately follows the trajectory indicated by A in FIG. Advance. At the same time as this forward movement is started, the document gripping plates 9 and 1
0 _-1 , 10 _-2 , and 10 _-3 are opened via the grip plate opener 101 by the action of the solenoid 23 (see FIGS. 3 and 5b). When the edge of the document is detected by the action of two pairs of sensors (consisting of 18 and 19) for detecting the edge of the document, the document feeder prevents the document from being detected, and at the same time, the solenoid 23 is turned OFF, and the document gripping plate 9 and 10
_-1 , _10-2 , and _10-3 are closed by the action of the spring material 71 stretched between them. In this _{state ,} as shown in FIG.
Elastic friction members 61, 6 provided at the tip of 0 _-3
It is sandwiched between 2. However, when the document P pulled up into the document suction device 105 is set diagonally, the two pairs of sensors detect the tilt by the drive of the alignment motor 22 and the action of the cam 45 and the cam follower 28. An operation is performed such that the end of the original document P which has become obsolete is held between the document gripping plates 9 and 10 _-1 , 10 _-2 , and 10 _-3 by the same distance over the entire gripping section.

As described above, the document holding plates 9 and 10 _-1 , 10
_-2 , 10 _-3 The sandwiched original P is shown by arrow E in the figure c.
The document is conveyed in the direction shown by , and then stopped at the position shown in d in the same figure, that is, the document reading position. This operation is performed by a position detection means (not shown). If the document P held at this time is tilted as described above, the document is positioned so that it is parallel to the document reading sensor.
That is, an alignment operation is performed. After stopping at this original reading position, original holding plates 9 and 10 are used to make it easier for the reading surface of the original to come into contact with the platen glass 67.
_-1 , 10 _-2 , 10 _-3 rotate at a certain angle while holding the original P, that is, the tip 88 of the original gripping part
After the document is almost in contact with the upper surface 67 of the platen glass, the original reading operation is performed. The original P whose one side has been scanned in the above manner is moved to a reversing operation as shown in FIG.

This reversing operation is performed when the document P held by the document gripping section
This is accomplished by rotating around the document reversing assist bar 102 protruding from the side opposite to the document gripping section (see also FIG. 1). This reversal assist bar 10
2 has a static elimination brush 110 via a bearing material 108.
Since it comes into contact with the surface of the document undergoing an inversion operation, it is possible to remove static electricity from the document that has been charged during movement. Then, as the original P is conveyed in the direction of arrow E' as shown in Figure f, the static electricity is further removed, and the original P is completely turned over. Then, the original is conveyed again in the direction shown by arrow E in h of the same figure, and when it reaches the same position where the original was reversed, the original holding plates 9 and 10 are moved as shown by i in the same figure.
_-1 , 10 _-2 , and 10 _-3 are opened and the original P is ejected. Next, by rotating the first arm 5 and document gripping plates 9 and 10 _-1 , 10 _-2 , and 10 _-3 as shown in FIG. , in the state shown by the solid line in the same figure, moves in the direction of arrow E', returns to the standby position shown by a in the figure, and moves on to the next document conveyance operation.

Next, the case of reading both sides of a document will be explained.

The same explanation will be given with reference to FIG. 5, but since the operation from instructing the start of reading the original to reversing the original (see e in FIG. 5) is the same as in the case of single-sided reading, the description will be omitted. Next, move the reversed original P to the arrow f in the same figure.
After conveying in the direction shown by E' and stopping the document conveying and reversing device at the reading position of the reversed document shown in g in the same figure, the tip 88 of the document gripping section is
The document reading operation is performed while the document is in almost contact with the upper surface 67 of the platen glass. The original P whose both sides have been read in the above manner is conveyed in the direction indicated by the arrow E in FIG. The following operations are also the same as those described above for single-sided reading, and will therefore be omitted.

However, the original P sucked by the original suction device 105
If there is a large deviation, the above-mentioned sensors 18 and 1 provided on the document gripping section of the document conveying and reversing device
Until the end of the document is detected by the document transport/inverter 9, the document transport/inverter continues to move forward, rotate the first arm 5, document gripping unit, etc. When the document suction device 105 reaches a position where it starts to come into contact with the document suction device 105, a limit switch (not shown) stops these operations and notifies the user that the document cannot be gripped.

Furthermore, in this device, if the gripped document shifts or falls during transportation, the sensors 18 and 19 detect the presence or absence of the document and immediately stop all operations. It is configured to send a report.

<Effects> As described above, the document reversing device according to the present invention does not stain or damage the sheet material, and the conveying process for reversing the document is very simple and easy, so that it can be easily charged. To provide a small and highly reliable document reversing device that is not easily charged, and can prevent operational errors caused by charging by using a reversing auxiliary bar having a static eliminating brush during reversing operation even if the document is slightly charged. can do.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the document conveying and reversing device according to the present invention, FIG. 2 is a partial sectional view of the document conveying and reversing device according to the present invention, and FIG. 3 is a portion viewed from the direction indicated by arrow H in FIG. 1. The side view and FIG. 4 are explanatory diagrams for explaining the operation of the present invention, and FIGS. 5 a to 5 j are explanatory diagrams for explaining the reversing operation. 1... base plate, 2, 3... frame, 5... first
Arm, 6... First arm rotation motor, 7, 2
0,85...slit disk, 8,21,86...
Sensor, 9, 10 _-1 , 10 _-2 , 10 _-3 ... Document gripping plate, 11 ... Main shaft, 17 ... Document gripping plate rotation motor, 18, 19 ... Sensor, 2
2... Alignment motor, 23... Solenoid, 28
...Cam follower, 45...Cam, 55...Gear mounting pipe, 56...Solenoid mounting pipe, 6
0...Slider, 65...Roller, 70...Slide shaft, 75...Guide rail, 90
...Conveyance motor, 91...Main pulley, 10
0... Drive wire, 102... Document reversal assist bar, 110... Static elimination brush, 105... Original suction device.

Claims (1)

[Scope of Claims] 1. A document gripping portion that grips a document, a rotation portion that rotates the document gripping portion around a predetermined fulcrum, and a moving portion that moves the document gripping portion and the rotation portion, A document conveyor comprising a document reversing means for rotating a document gripping section that has been moved to a predetermined position around the specific bar and inverting the document gripped by the document gripping section. The document conveying device, wherein the specific bar is provided with a static eliminating material for removing static electricity charged on the document. 2. The document conveying device according to claim 1, wherein the static eliminating material is a static eliminating brush.