JPH07197929A - Hinge device - Google Patents

Abstract

PURPOSE:To facilitate installation of document retainer, and properly set an opening angle for usage by regulating a document retainer in an upright state on an image forming device, and regulating the opening angle small. CONSTITUTION:In a hinge device, installation parts 20 and 21 are opened across a shaft member 22 by energizing force of a spring 23, and regulation parts 24, 25 are abutted against each other. When the installation part 20 is installed on a copy machine, an automatic document feeder(ADF) is erected upwards. The regulation part 29 is energized by an energizing means 30, and an end 29A of the regulation part is abutted against an engagement shaft 26. In the case that the installation part 20 is mounted on an upper surface of the copy machine and positioned, a line of force to be applied to a specific gravity of the ADF passes the installation part 20. Moment to incline the ADF is small, so that the installation part 20 can easily be fixed to the copy machine. When installation of the ADF to the copy machine is finished, the ADF falls to the side of platen, and is opened again. An engagement part 27 is engaged with an engagement shaft 26, to regulate the opening angle properly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device for opening and closing a document holding device for covering a document setting surface of an image processing device such as a copying machine or an image reader so that the document processing device can be opened and closed.

[0002]

2. Description of the Related Art An example of a hinge device for connecting an image processing device, for example, a copying machine, to a document pressing device for covering the document setting surface of the copying machine so that the document pressing device can be opened and closed vertically is, for example, the Japanese Utility Model Publication No.
There is one disclosed in Japanese Patent Publication No. 7-11544.

The document pressing device as in this publication is usually mounted in a forward tilted posture so that it can be easily opened and closed. That is, if the document pressing device is configured to open 90 degrees or more with respect to the horizontal document setting surface, and if there is a wall or the like on the back surface of the copying machine, the document pressing device will open on this wall or the like when opened. When hitting or closing, it is necessary to raise it up to 90 degrees and then close it, and it is difficult to operate, so it is not opened more than 90 degrees.

[0004]

However, when such a document holding device is attached to a copying machine, it is easy to fall forward in the forward tilted posture as described above, and the document holding device is supported by one hand or by other means. Need to get support from. In particular, the document holding device simply holds the document, blocks external light,
In the case of a so-called automatic document feeder having not only a cover function for providing a white background of the document but also an automatic document feeding function, the form is large and the weight is considerably large. There was a problem that it would be very difficult to attach if it was tilted forward if it was tilted forward.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hinge device which allows the document holding device to be easily attached to the image processing apparatus and which allows the document holding device to be set at an appropriate opening angle after use. To do.

[0006]

[Means for Solving the Problems]

(1) In a hinge device for connecting an original pressing device for covering an original setting surface of the image processing device to the image processing device in a freely openable and closable manner as in claim 1, a first attachment attached to the image processing device. Section, a second attachment section attached to the document pressing device, and the first attachment section.
And a shaft member that rotatably connects the second mounting portion, and a first mounting portion that is provided between the first mounting portion and the second mounting portion and that has the shaft member as a center. Energizing means for urging the second attachment portion in the opening direction and the urging means provided on the first and second attachment portions, respectively, and when the original document holding device is opened, they come into contact with each other and the original document holding device. Between the first mounting portion and the second mounting portion, and the first mounting portion and the second mounting portion for restricting a predetermined angle while standing on the image processing apparatus. When the is opened, an angle regulation for regulating the opening angle to an angle smaller than the predetermined angle and a regulation means for selectively canceling the angle regulation are provided.

(2) As set forth in claim 2, the first mounting portion is provided on one of the first mounting portion and the second mounting portion.
A first engaging portion for restricting an opening angle between the mounting portion of the second mounting portion and the mounting portion of the second mounting portion. , The first engaging portion is rotatably attached to the side where the first engaging portion is not provided, and when the first restricting portion and the second restricting portion are in contact with each other and closed by a predetermined amount, the first engaging member When the document holding device is opened by engaging with the joint portion, the first holding portion and the second engaging portion have a second engaging portion that restricts an opening angle thereof to an angle smaller than the predetermined angle. A restriction member having a pressing portion that is movable in a direction in which the first engaging portion and the second engaging portion are separated from each other in a closed state until the engagement with the engaging portion is released; The second engaging portion is the first
Second for urging the regulating member in the direction of engaging the engaging portion of
And an urging means of.

(3) As the restricting means as claimed in claim 3,
Of the first attachment portion and the second attachment portion, the first attachment portion is rotatably attached to the side where the first engagement portion is not provided, and from a narrower inlet than the first engagement portion. A second engaging portion and a space in which the first engaging portion can move, the first restricting portion and the second engaging portion.
When a predetermined amount is closed from the state of contact with the restriction portion of the
The second engaging portion is pushed open by the engaging portion of the first
When the document holding device is opened by entering the engaging portion of the above into the moving space, the opening angle is restricted to an angle smaller than the predetermined angle, and a force in the opening direction of a predetermined amount or more is applied to the second mounting portion. Is provided, the first engaging portion is disengaged from the second engaging portion.

[0009]

【Example】

<< First Embodiment >> A first embodiment of the present invention will be described below with reference to the drawings.

<Structure> In this embodiment, as shown in FIG. 1, an image processing apparatus such as a copying machine 1 is provided with a document pressing device such as an automatic document feeder 2 (hereinafter referred to as ADF 2) via a pair of left and right hinge devices 3. It is attached so that it can be opened and closed freely. Note that the document pressing device is not limited to the ADF 2, and may be a device that does not have a document transportation function and simply covers the document.

The copying machine 1 includes a power switch 4, an operation panel 6 having a copy button 5, a document setting surface, for example, a platen 7 on which a document is set and is covered by the ADF 2, and a document set on the platen 7. A stopper 10 as a reference, which is retractable, and a stepped hook 8 and a screw hole 9 for attaching the hinge device 3 are provided.

As shown in FIGS. 12 to 15, the hinge device 3 has a first mounting portion 20 formed of an iron plate mounted on the copying machine 1 and a second mounting portion 21 formed of an iron plate mounted on the ADF 2. And the first and second mounting portions 20 and 21 are rotatably coupled by a shaft member 22. A first biasing means, for example, two springs 23 are provided between the first mounting portion 20 and the second mounting portion 21, and the first mounting portion 20 and the second mounting portion 20 are provided around the shaft member 22. The mounting portion 21 is urged in the opening direction.

A is attached to the first and second mounting portions 20 and 21.
When the DF2 is opened, the ADF2 and the copier 1 are brought into contact with each other.
First and second restricting portions 24 and 25 for restricting to a predetermined angle while standing up are provided. Although the first and second restricting portions 24 and 25 are provided on the back surfaces of the first and second mounting portions 20 and 21 in this embodiment, they may be provided on the side surfaces.

One of the first mounting portion 20 and the second mounting portion 21, for example, the opening between the first mounting portion 20 and the second mounting portion 21 in the first mounting portion 20. A first engaging portion for regulating the angle, for example, an engaging shaft 26 is provided, and one of the first attaching portion 20 and the second attaching portion 21 where the engaging shaft 26 is not provided, here, The second mounting portion 21 has a shaft member 31 and a regulating member 29.
Is rotatably attached.

The regulating member 29 is changed from the state where the first regulating portion 24 and the second regulating portion 25 are in contact with each other as shown in FIG.
When a predetermined amount is closed as shown in 4, the engagement shaft 26 is engaged, and the ADF
A second engaging portion, for example, a U-shaped engaging concave portion 2 that restricts the opening angle to an angle smaller than the predetermined angle when the opening portion 2 is opened.
7, and the engagement shaft 2 in the closed state until the engagement between the engagement shaft 26 and the engagement recess 27 is released as shown in FIG.
It has a pressing portion 28 that is movable in a direction in which 6 and the engaging concave portion 27 separate from each other and is pushed by a finger. In addition, the regulation member 29
Is provided with a second urging means such as a leaf spring 30 for urging the engagement recess 27 in the direction of engaging the engagement shaft 26.

As shown in FIGS. 3 and 12, the first mounting portion 20 is provided with a hook hole 32 for mounting in the copying machine 1 and a hole 34 for mounting in the screw hole 9 with a screw 33.

One end of each of the two springs 23 is a shaft member 26.
The support member 35 attached to the shaft member 31 and the other end thereof are supported by the support member 36 attached to the shaft member 31. In addition, expandable shafts 37A and 37B are provided between the support members 35 and 36 in the spring 23.

As shown in FIGS. 1 and 2, the ADF 2 includes a paper feed table 101 (placement section) which is arranged above the platen 7 and on which a document is placed, and an inclination of 25 degrees on the paper feed table 101. And a paper feed unit 103 that separates a plurality of originals placed on the paper feed tray 101 into one and guides it downward to feed it onto the platen 7, and Paper section 1
Transporting means 104 for moving the document supplied from 03 from one end side to the other end side of the platen 7, and this transporting means 104.
And a paper discharge unit 105 that guides a document moving across the other end side of the platen 7 upward and discharges it to the paper discharge tray 102. A control means (not shown) having a step feed mode is provided.

The paper feed tray 101 has a gentle mountain shape as shown in FIG. 4, and has an uphill slope 106A and a downhill slope 1.
06B and a mounting surface 106, and the mounting surface 1
A pair of side edge regulating members 107L and 107R for regulating both side edges of the document placed on 06, and a stopper 109 for supporting the paper ejection tray 102 at the discharged document accommodating position 108A are provided.

The descending slope is inclined, for example, 3 degrees. Further, the side edge regulating member 107L serves as a reference for setting the original, and as shown in FIG. 7, an elongated hole 110 is provided on the bottom surface, and the position can be adjusted by the screw 11 in a direction intersecting the paper feeding direction. There is. Further, the side edge regulating member 107
The R is configured to be movable along the elongated hole 112 in a direction intersecting the sheet feeding direction according to the size of the document to be set.

As shown in FIG. 8, the paper feed port 113 of the paper feed unit 103.
A guide 114 that guides the stacked originals inserted from the paper feed port 113 along the placement surface 106 upward, and an elastically deformable synthetic resin sheet 115 attached to the tip of the guide 114, around A guide 129 provided above the guide 114, a stopper 116 formed at the tip of the guide 129 to regulate the leading edge of the stacked originals, and attached to the tip of the stopper 116, and fed out by a sheet feeding roller 118 described later. And an elastically deformable synthetic resin sheet 117 (first separating means) that follows the original of the lowermost paper and a rubber is formed on at least the peripheral surface of the inserted original that comes into contact with the lowermost paper and feeds it. Paper feed roller 118 and a pressing member 11 attached to the shaft 119A for contacting the top paper document and pressing the document against the paper feed roller 118.
9 and a paper feed port 11 rotatably attached to the shaft 119A.
Lever 120A and lever 1 for detecting the presence / absence of the document No. 3
An empty sensor 120 having a detection unit 120B that detects the position of 20 is provided.

The synthetic resin sheet 115 guides the original inserted into the paper feed port 113 toward the stopper 116 so that the leading edge of the original does not abut the peripheral surface of the paper feed roller 18. The pressing member 119 is driven by a solenoid (not shown) to rotate the shaft 1.
19A is configured to move up and down, and lowers before pushing out the document to press the document, and rises for a predetermined time after the motor 162 rotates normally or when the registration sensor 132 detects the document.

As shown in FIG. 5, the one-way clutch 160 is built in the paper feed roller 118 and is attached to the rotary shaft 124 (first drive shaft). This rotary shaft 124 has
Two wide guide rollers 125 (following rollers) are rotatably (idlely) provided on each side. Further, a plurality of narrow guide rollers 126 are rotatably (so as to idle) provided on the rotary shaft 124. The guide rollers 125 and 126 are made of synthetic resin such as plastic, and the friction coefficient of the peripheral surface is set smaller than that of the paper feed roller 118.

The rotary shaft 124 is driven by a motor 162 so that the pulley 170, the timing belt 171, the pulleys 172, 173, the timing belt 174, the pulley 175, the gears 176, 178 are driven as shown in FIGS.
Driven through.

In the one-way clutch 160, when the motor 162 rotates in the normal direction, the rotation of the rotary shaft 124 causes the feed roller 1 to rotate.
18 is set. That is, when the motor 162 rotates in the normal direction, the paper feed roller 118 rotates in the paper feed direction, and in the case of reverse rotation, the paper feed roller 118 does not rotate.

As shown in FIG. 8, a separation unit 121 (second separation means) having a separation pad 128 for preventing the document from following the bottommost sheet is attached to the paper feed roller 118.
Pressed at 7. The second separating means may be a roller that is pressed against the paper feed roller 118 and rotates in a direction opposite to the paper feed direction to prevent the document that follows the bottom sheet from advancing. Further, the second separating means may be arranged on both sides of the paper feed roller 118 so that the peripheral surfaces thereof intersect in the axial direction, and may be in a structure not in contact with the peripheral surface of the paper feed roller 118.

By the way, the side edge regulating member 10 as shown in FIG.
The widthwise center of each of the documents to be fed set on the paper feed tray 101 with one side edge regulated by 7L is positioned within the width of the paper feed roller 118 and the separation pad 128 in the direction intersecting the paper feed direction. The widths of the paper feed roller 118 and the separation pad 128 are set so as to prevent the document from skewing.

The size of the document to be fed is, for example, A3.
T / A4T / A4Y / B4T / B5T / B5Y / LED
GER-T / LEGAL-T / LETTER-T (LT
T) -LETTER-Y (LTY). It should be noted that T indicates the case of being set vertically in the sheet feeding direction, and Y is the case of setting to be horizontally long.

Further, the synthetic resin sheet 117 and the separating pad 128 are arranged on the rotary shaft 1 of the paper feed roller 118 as shown in FIG.
It is provided so as to be opposed to the peripheral surface above 24 and in front of the rotating shaft 124 in the sheet feeding direction.

Paper feed roller 118, guide roller 125,
A guide 122 that forms a curved path 123 is provided between the guide roller 126 and the guide roller 126, and guides one sheet separated by the sheet feed roller 118 and the separation unit 121 downward. At the tip of the guide 122, a synthetic resin sheet 130 is attached so as to contact the peripheral surface of the registration roller 131 so as to guide the document between the four pairs of guide rollers 125 and the registration roller 131.

A registration roller 131 for correcting the posture (registration correction) of the front end of the original is pressed against the guide roller 125 in the curved path 123. A registration sensor 132 for detecting the document is arranged immediately before the pressure contact between the guide roller 125 and the registration roller 131. At least the peripheral surface of the registration roller 131 is made of rubber, and the friction coefficient of the peripheral surface is set to be larger than that of the guide roller 125.

The rotary shaft 163 of the registrar roller 131 (second
The drive shaft) is a pulley 164 with a one-way clutch that meshes with the timing belt 174 as shown in FIG.
It is adapted to be driven by a motor 162 via 79 and 180.

The pulley 16 with a one-way clutch
No. 4 is set so that the rotation shaft 163 rotates in the sheet feeding direction when the motor 162 rotates in the reverse direction.

Further, as shown in FIG. 8, the guide 13 is placed in front of the pressure contact between the guide roller 125 and the registration roller 131.
3,134 forms a part of the curved path 123. The guide 134 is rotatable around a shaft 135 so that the curved path 123 can be jammed. The guide 134 is spring-biased in the closing direction.

As shown in FIG. 4, the conveying means 104 has a conveying belt 138 stretched between a pair of pulleys 136 and 137, and a conveying belt 138 arranged inside the conveying belt 138.
Is provided with a plurality of press roller units 139 and 140 and a press roller 141.

The pulley 136 is a pulley 173 as shown in FIG.
Timing belt 181, pulleys 182, 1 that mesh with
The motor 162 is driven via 83, the timing belt 184, the pulley 185, and the electromagnetic clutch 165.

As shown in FIG. 10, the press roller unit 139 is provided with press rollers 142 and 143, and is provided in the frames 144 and 145 in two rows in the document transport direction and four rows in the direction intersecting the document transport direction. Also, the frame 14
4 and 145 have mounting holes 144A and 144, respectively.
Four or more sets of B, 144C, 145A, 145B, and 145C are provided, and the mounting position can be changed in a direction intersecting the document transport direction of the press roller unit 139.

The press roller unit 140 is provided with a press roller 146 and has four rows in a direction intersecting with the document conveying direction.
It is attached to the frame 147.

As for the press roller 137, the document is the stopper 10
Although the conveyor belt 138 is pressed against the platen 7 in order to prevent the conveyor belt 138 from passing over the conveyor belt 138 at the lowest point.
Are configured so that they do not touch.

The stopper 10 is rotatably supported about the shaft 10A and is spring-biased toward the conveyor belt 138. As shown in FIG. 1, the stopper 10 is adapted to be retracted when pushed by an actuating member 11 which is projected by driving a solenoid (not shown) provided in the ADF 2.

As shown in FIG. 11, the paper discharge section 105 is a conveying means 10.
4 guides 149 and 15 that guide the document moving across the platen 7 upward along the curved path 148.
0, 151, a synthetic resin sheet 166 provided on the entrance side of the guide 149, a paper discharge sensor 152 for detecting the end portion of the document supplied to the curved path 148, and the curved path 148.
A plurality of paper discharge rollers 153 provided in a direction intersecting the paper discharge direction for discharging the document supplied to the paper, and pressing rollers 154 pressed against the peripheral surfaces of the paper discharge rollers 153.
It has and.

The rotary shaft 167 of the paper discharge roller 153 is driven by the rotational force of the pulley 137 via the pulley 186, the timing belt 187 and the pulley 188 as shown in FIG.

The discharge tray 102 has a shaft 155 as shown in FIG.
It is rotatably supported between the discharged document accommodation position 108A and the fed document setting position 108B. This is because the paper ejection tray 102 is arranged on the paper feed tray 101, and therefore when a document whose length in the paper feed direction exceeds A4Y, the paper ejection tray 1 is set when the document is set on the paper feed tray 101.
Since 02 is an obstacle and is difficult to set, it is possible to set the original on the paper feed tray 101 after the paper feed tray 101 is set to the paper feed original setting position 12B.

Further, the paper discharge tray 102 is provided with a retractable auxiliary tray 156 so that it can be expanded and contracted according to the size of the original. This is because if the size of the discharge tray 102 is set so that the maximum size of the original to be fed can be accommodated from the beginning, the discharge tray 102 covers most of the upper part of the paper feed table 101, and all of the above. In order to set a document of a size, the paper discharge tray 102 must be set up at the paper supply document setting position 108B. Therefore, at least a frequently used A4Y size document can be set without setting up the paper discharge tray 102. .

A sensor 157 is provided to detect that the paper discharge tray 102 is at the fed document storage position 108A. When the paper discharge tray 102 is standing, the sensor 1 is provided.
Even if 57 is turned off and the copy button 5 in FIG. 1 is pressed, the document conveyance is prohibited.

The control means receives the signals from the copying machine 1, the empty sensor 120, the registration sensor 132, the paper discharge sensor 152, etc., and the motor 162, the electromagnetic clutch 165, and the like.
The drive solenoid of the pressing member 119, the drive solenoid of the stopper 10 and the like are controlled to convey the document in the normal conveyance mode or the step feed mode.

In the normal transport mode, the original is large and
This is a document feed mode when only one document can be set on the platen 7.

In the step feed mode, the document is A4 size.
When two originals can be set on the platen 7 like Y / B5Y, two originals are supplied on the platen 7,
This is a mode in which the original replacement time is shortened and the speed is increased by copying the sheets one by one.

<Operation> (1) Attachment of ADF 2 to Copying Machine 1 In the above-mentioned structure, the hinge device 3 is opened by the urging force of the spring 23 so that the attachment portion 20 and the attachment portion 21 are opened around the shaft member 22. The regulation portion 24 and the second regulation portion 25 are in contact with each other. Therefore, when the mounting portion 20 is mounted on the copying machine 1, the ADF 2 is in a standing state. In this state, the regulation member 29 is biased toward the engagement shaft 26 by the biasing means 30, and the tip 29A of the regulation member 29 is in contact with the engagement shaft 26.

Therefore, when the mounting portion 20 is placed on the upper surface of the copying machine 1 and the hook hole 32 of the mounting portion 20 is engaged with the stepped hook 8 to be positioned, the gravity force line applied to the center of gravity of the ADF 2 is almost this. ADF2 through the mounting part 20
The moment to try to tilt forward or backward is small,
It can be supported with a little hand, the screw 33 can be easily tightened, and the mounting portion 20 can be easily fixed to the copying machine 1.

When the ADF 2 is completely attached to the copying machine 1, the ADF 2 is pulled down to the platen 7 side. As a result, the tip 29A of the regulating member 29 moves on the peripheral surface of the engagement shaft 26, and when the tip 29A is inclined by a predetermined angle, the engagement portion 27 engages with the engagement shaft 26. When the ADF 2 is further pulled down, the engagement between the engagement portion 27 and the engagement shaft 26 is disengaged, and the arcuate portion 29B of the regulating member 18 comes into sliding contact with the engagement shaft 26. Conveyor belt 138 when completely closed
Contacts the platen 7.

When the ADF 2 is opened, the engagement shaft 26 and the arc portion 2
9B is rotated while being in contact with 9B, and the engaging portion 27 is engaged with the engaging shaft 26.
When it is engaged with, it is regulated to an appropriate opening angle. Therefore, when setting the original on the platen 7, the original can only be opened up to this angle.

AD such as when removing ADF2
When it becomes necessary to stand F2 vertically, the arc portion 29
The ADF 2 is tilted to the angle at which B is in contact with the engagement shaft 26, and the pressing portion 28 provided on the regulation portion 29 is biased by the biasing means 3.
When pressed with a finger against the biasing force of 0, the circular arc portion 29B engages with the engaging shaft 2
No contact with 6. ADF with pressing part 28 pressed
When 2 is raised, the engaging portion 27 passes over the engaging shaft 26 and opens at a predetermined angle or more, and the restricting portion 24 and the restricting portion 25 come into contact with each other to be in a vertical state.

In such a state, the screw 33 can be removed by the driver, and the ADF 2 can be removed. (2) Operation of ADF 2 First, by turning on the power switch 4 of the copying machine 1, a predetermined initial setting is made, and the pressing member 119 is raised,
The stopper 10 is in a state of protruding from the surface of the platen 7. In such a state, the operator inserts a plurality of documents into the paper feed port 113 while lowering them from the upper side to the lower side of the paper feed tray 101 with the front side facing up, and sets the originals on the paper feed tray 101. At this time, if the size of the document is small, such as A4Y or smaller, the paper ejection tray 102 is moved to the paper ejection document storage position 12.
The original can be set even when it is tilted to A. When the document size is A4T / B4T / A3T larger than A4Y, the paper ejection tray 102 on the paper feed tray 101 becomes an obstacle, so the paper ejection tray 102 is set at the paper feeding original document setting position 108B.
It is also possible to set it upright.

When the setting of the originals is completed, the discharge tray 1
If 02 stands at the set position 108B of the document to be fed, it is tilted to the position 108A for storing the document to be discharged. When the size of the fed document is larger than A4Y, the auxiliary tray 156 is pulled out so that the discharged document can be supported. It should be noted that if the paper ejection tray 102 is located at the fed document setting position 108B, the sensor 1
57 detects the discharge tray 102, and the paper feeding operation is prohibited. Therefore, even if the operator turns on the copy button 5, the ADF 2 does not carry out the document conveying operation.

When the document is inserted into the paper feed port 113, the lever is pushed up to turn off the empty sensor 120, and the leading end of the document is restricted by the stopper 116.

When the copy button 5 is turned on, the pressing member 11
9 descends, the original is pressed against the paper feed roller 118, and after a predetermined time, the motor 162 is rotated in the forward direction to rotate the rotary shaft 12
4 rotates. Therefore, the paper feed roller 118 rotates,
The guide roller 125 and the guide roller 126 run idle. The registration roller 131 does not rotate because the one-way clutch 164 is interposed, and the pulley 136 does not rotate because the electromagnetic clutch 165 is off.

By rotating the paper feed roller 118, a plurality of lower layer papers of the original are sent out. These documents are fed by the paper feed roller 1.
When passing through a narrow space between 18 and the synthetic resin sheet 117, the upper layer original document is displaced by the synthetic resin sheet 117, and the number of original documents passing through this space is reduced.

A plurality of originals which have passed through this gap are separated into one by a separation pad 128 pressed against the paper feed roller 118, and only the lowermost paper is sent out. Then, the leading edge of the original is detected by the registration sensor 132 and abuts between the stopped guide roller 125 and the registration roller 131. After a lapse of a predetermined time from the time when the registration sensor 132 detects the leading edge of the document, the motor 162 stops and the paper feed roller 118 stops. During this time, the trailing edge of the original is slightly fed, and the original is curved in the resist space to correct the posture.

Then, the electromagnetic clutch 165 is turned on by the paper feed progress command, the motor 162 is rotated in the reverse direction, the registration roller 131 and the pulley 136 are driven, and the document abutted against the registration roller 131 is sent out, and along the platen 7. Be transported.

When the registration sensor 131 detects the trailing edge of the document, the motor 162 rotates and then the registration sensor 1
The size of the original is detected by the amount of rotation of the motor 162 until 31 detects the trailing edge. In the case of B5Y / A4Y, the step feed mode is automatically selected, and in other cases, the normal transport mode is selected. It

For example, when the step feed mode is set, the fed document is not transported until it hits the stopper 10, and the driving of the motor 162 is stopped before the leading edge of the document reaches the center of the platen 7 in the transport direction. Then, the electromagnetic clutch 165 is also turned off.

The motor 162 is again driven in the normal direction, the next original is fed out by the above-described operation, and is abutted against the registration roller 8131 to correct the registration. At this time, the motor 162 is rotated in the reverse direction after the registration is corrected in order to adjust the distance to the original conveyed on the platen, and the original is slightly fed.

In this state, when the electromagnetic clutch 165 is turned on, the conveyor belt 138 also rotates, the original document on the platen 7 and the next registered original document are conveyed at the same time, and the motor 162 is turned on when the leading original document hits the stopper 10. Stop. As a result, two originals are set on the platen 7 on the left and right. Then, the copying machine 1 starts the copying operation, and the document abutted against the stopper 10 is copied. In the meantime, the next original is registered by the registration roller 13.
The operation is advanced from 1 to the position slightly fed.

When the copying is completed, the stopper 10 is retracted, and the motor 162 is driven in the reverse direction and the electromagnetic clutch 16 is driven.
When the switch 5 is turned on, the registration roller 131 and the conveyor belt 1
38, the paper discharge roller 153 is driven to discharge the copy original and move the right original of the platen 7 toward the stopper 10;
The leading document is conveyed onto the platen 7. The stopper 10 projects onto the platen 7 and stops the original before the next original passes. When the document hits the stopper 10, the motor 162 is stopped and copying is performed. At this point, if the copied document has not passed the sheet discharge roller 153, it is discharged when the conveyor belt 138 rotates next time.

Thereafter, this operation is repeated and the final document is copied and discharged to the discharge tray 109, and then the operation ends.

On the other hand, when the normal transport mode is selected, the originals are set on the platen 7 one by one and copied. Therefore, the processing speed becomes slower than in the step feed mode. << Second Embodiment >> The hinge device 3 may have a configuration as shown in FIGS. In the hinge device 3 of this embodiment, one of the first mounting portion 20 and the second mounting portion 21 not provided with the engaging shaft 26, here, the mounting member 21 is rotatably made of synthetic resin or the like. The restriction member 52 formed of the elastic material is provided. This restriction member 52
Has a second engaging portion 50 which is an inlet having a width narrower than that of the engaging shaft 26, and has a space (oblong hole) 51 in which the engaging shaft 26 can move, as shown in FIG. Regulatory part 2 of 1
4 and the second restricting portion 25 are in contact with each other, and when a predetermined amount is closed as shown in FIG. 18, the engaging shaft 26 causes the second engaging portion 5 to move.
When 0 is pushed open and the engaging shaft 26 enters the moving space 51 inside, and the ADF 2 is opened, the opening angle is restricted to an angle smaller than the predetermined angle and the second mounting portion 2
The engaging shaft 26 is disengaged from the second engaging portion 50 when a force in the opening direction more than a predetermined value is applied to 1.

In the above structure, when the engaging shaft 26 is not in the moving space 51 as shown in FIG. 17, the first regulating portion 24 and the second regulating portion 25 are in contact with each other by the urging force of the spring 23. Therefore, when the mounting portion 20 is mounted on the copying machine 1, the ADF 2 is in a standing state.

Then, the hook hole 32 of the mounting portion 20 is engaged with the stepped hook 8 to be positioned, and the screw 33 is tightened to fix it to the copying machine 1.

When the connection of the ADF 2 to the copying machine 1 is completed, the ADF 2 is pulled down to the platen 7 side. As a result, the second engaging portion 50 is pushed open by the engagement shaft 26, and the engagement shaft 26 enters the internal movement space 51, and the movement range of the engagement shaft 26 is within the movement space 51 as shown in FIG. Regulated by.

Therefore, when the ADF 2 is opened, the engaging portion 50 restricts the movement of the engaging shaft 26, and the opening angle is set to an angle smaller than the predetermined angle.

When a force is applied to the second mounting portion 21 in the opening direction more than a predetermined value, the engaging shaft 26 is moved to the second position.
It disengages from the engaging portion 50, and the restricting portion 24 and the restricting portion 25 come into contact with each other to be in a vertical state. In such a state, the screw 33 can be removed by a screwdriver.

[0073]

According to the invention of claim 1, when the first attachment portion is attached to the image processing apparatus, the first and second restricting portions are in contact with each other so that the document pressing device stands on the image processing apparatus. Since the document holding device is regulated to a predetermined angle in a closed state, it is easy for an operator to support the document holding device and the work of attaching the document holding device to the image processing apparatus is easy. When opened, the opening angle is regulated to be smaller than the predetermined angle, so that the document holding device can be set to an appropriate opening angle for use. Further, by releasing the restricting means, the opening angle of the document pressing device can be easily returned to the predetermined angle.

According to the second aspect of the present invention, when the first attachment portion is attached to the image processing apparatus, the first and second restricting portions are in contact with each other and the document pressing device is standing on the image processing apparatus. Since the document pressing device is restricted to a predetermined angle, it is easy for the operator to support the document pressing device and the work of attaching the document pressing device to the image processing apparatus is easy, and of course, the second biasing means allows the second engaging portion to be attached. Urging the regulating member in the direction of engaging the first engaging portion, the first engaging portion and the second engaging portion are closed when the document pressing device is closed by a predetermined amount after the attachment is completed. By engaging, the opening angle of the document pressing device is automatically regulated to an angle smaller than the predetermined angle, and the opening angle of the document pressing device can be set to an appropriate opening angle for use. Further, when the pressing portion is pushed in the closed state until the engagement between the first engaging portion and the second engaging portion is released, the first engaging portion and the second engaging portion are separated from each other. By moving in the away direction, the angle regulation is released, and the opening angle of the document pressing device can be easily returned to the predetermined angle.

According to the third aspect of the present invention, when the first mounting portion is mounted on the image processing apparatus, the operator can easily support the document holding apparatus, and the work of mounting the document holding apparatus on the image processing apparatus is easy. Of course, the first restriction part and the second
The second engaging portion is pushed open by the first engaging portion and the first engaging portion enters the moving space inside the regulating member when the second engaging portion is opened by a predetermined amount while the regulating portion is in contact with the original pressing member. When the device is opened, the opening angle can be restricted to an angle smaller than the predetermined angle, and the document holding device can be set to an appropriate opening angle for use. Further, when the document pressing device is opened so that a force in the opening direction of a predetermined amount or more acts on the second mounting part, the first engaging part is disengaged from the second engaging part, and the opening angle of the document pressing device becomes smaller than the above. It is possible to easily return to the predetermined angle.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounted state of a copying machine and an automatic document feeder.

FIG. 2 is a perspective view of the automatic document feeder as seen from above.

FIG. 3 is a perspective view of the automatic document feeder as viewed from the bottom.

FIG. 4 is a cross-sectional view showing an overall configuration of an automatic document feeder.

FIG. 5 is an explanatory diagram of a drive mechanism of the automatic document feeder.

FIG. 6 is an explanatory diagram of a drive mechanism of the automatic document feeder.

FIG. 7 is a diagram showing a part of a configuration of a paper feed tray of the automatic document feeder.

FIG. 8 is a cross-sectional view showing a configuration of a paper feed unit of the automatic document feeder.

FIG. 9 is a diagram showing a configuration of a paper feed roller and a guide roller of a paper feed unit.

FIG. 10 is a diagram showing a configuration of a conveyance unit of the automatic document feeder.

FIG. 11 is a cross-sectional view showing a configuration of a paper discharge unit of the automatic document feeder.

FIG. 12 is a perspective view of the first embodiment of the hinge device.

FIG. 13 is an operation explanatory view of the hinge device in FIG.

FIG. 14 is an operation explanatory view of the hinge device in FIG.

FIG. 15 is an operation explanatory view of the hinge device in FIG.

FIG. 16 is a perspective view of a second embodiment of the hinge device.

FIG. 17 is an operation explanatory view of the hinge device in FIG. 16.

FIG. 18 is an operation explanatory view of the hinge device of FIG. 16.

FIG. 19 is an operation explanatory view of the hinge device in FIG. 16.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copier (image processing apparatus) 2 Automatic document feeder 3 Hinge device 20 1st attachment part 21 2nd attachment part 22 Shaft member 23 Spring (1st biasing means) 24 1st control part 25 2nd Regulating portion 26 engaging shaft (first engaging portion) 27 engaging concave portion (second engaging portion) 29 regulating member 30 leaf spring (second urging means) 50 second engaging portion 51 space 52 Control member

Claims (3)

[Claims] 1. A hinge device for opening and closing a document pressing device covering a document setting surface of an image processing device so as to be openable and closable with respect to the image processing device, the first attachment part being attached to the image processing device, and the document. A second attachment portion attached to the pressing device, a shaft member that rotatably connects the first and second attachment portions, and a shaft member provided between the first attachment portion and the second attachment portion. Urging means for urging the first mounting portion and the second mounting portion in the opening direction about the shaft member, and the manuscript provided in the first and second mounting portions, respectively. When the pressing device is opened, the document pressing device comes into contact with each other and restricts the document pressing device to a predetermined angle while standing on the image processing device; first and second restricting parts; Take two An angle regulation that acts between the attachment section and the document holding apparatus to regulate the opening angle to an angle smaller than the predetermined angle when the document holding apparatus is opened, and a regulation unit that selectively releases the angle regulation. A hinge device characterized by the above. 2. A hinge device for connecting a document pressing device for covering a document setting surface of the image processing device to the image processing device so as to be openable and closable, a first mounting portion mounted on the image processing device, and the document. A second attachment portion attached to the pressing device, a shaft member that rotatably connects the first and second attachment portions, and a shaft member provided between the first attachment portion and the second attachment portion. And a first urging means for urging the first mounting portion and the second mounting portion in the opening direction around the shaft member, and the first and second mounting portions, respectively. First and second restricting portions that contact each other when the document pressing device is opened and restrict the document pressing device to a predetermined angle while standing on the image processing device; and the first mounting part. And the second A first engaging portion provided on any one of the mounting portions for restricting an opening angle between the first mounting portion and the second mounting portion, the first mounting portion, and the first mounting portion. Of the second attachment portions, the first engagement portion is rotatably attached to the side where the first engagement portion is not provided, and a predetermined amount from the state where the first regulation portion and the second regulation portion are in contact with each other. It has a second engaging portion that engages with the first engaging portion when closed and restricts the opening angle to an angle smaller than the predetermined angle when the document pressing device is opened. A pressing portion that is movable in a direction in which the first engaging portion and the second engaging portion are separated from each other in a closed state until the engagement between the engaging portion and the second engaging portion is released. A regulating member that has, and urges the regulating member in a direction in which the second engaging portion engages with the first engaging portion. Hinge device being characterized in that a second urging means. 3. A hinge device for connecting a document pressing device for covering a document setting surface of the image processing device to the image processing device so as to be openable and closable, a first mounting portion mounted on the image processing device, and the document. A second attachment portion attached to the pressing device, a shaft member that rotatably connects the first and second attachment portions, and a shaft member provided between the first attachment portion and the second attachment portion. Urging means for urging the first mounting portion and the second mounting portion in the opening direction about the shaft member, and the manuscript provided in the first and second mounting portions, respectively. When the pressing device is opened, the document pressing device comes into contact with each other and restricts the document pressing device to a predetermined angle while standing on the image processing device; first and second restricting parts; Take two A first engagement portion provided on either one of the attachment portions for restricting an opening angle between the first attachment portion and the second attachment portion; the first attachment portion and the first attachment portion; Of the two attachment portions, the second engagement portion is rotatably attached to the side where the first engagement portion is not provided and has a narrower inlet width than the first engagement portion. At the same time, it has a space in which the first engaging portion can move, the first restricting portion and the second
When a predetermined amount is closed from the state of contact with the restriction portion of the
The second engaging portion is pushed open by the engaging portion of the first
When the document holding device is opened by entering the engaging portion of the above into the moving space, the opening angle is restricted to an angle smaller than the predetermined angle, and a force in the opening direction of a predetermined amount or more is applied to the second mounting portion. And a regulating member formed of an elastic material, the first engaging portion being disengaged from the second engaging portion.