JPH04257874A - Automatic document feeder for copying machine - Google Patents

Abstract

PURPOSE:To easily perform both operation for setting a document and operation for taking out a document after copying operation on a automatic document feeder for the copying machine which has a document setting part where the document to be copied is mounted and a document discharging tray where the copied document is discharged and is installed on the top surface of a copying main body whose installation area is limited. CONSTITUTION:The automatic document feeder for the copying machine is equipped with a tray supporting means which supports the document discharge tray (T2) rotatably between a document storage position (P1) arranged above the document setting part (T1) and a raising position (P2) distant from above the document setting part (T1), a document storage position holding means (14b) which holds the discharge tray (T2) at the document storage position (P1), and raising position holding means (16 and 17) which hold the discharge tray (T2) at the raising position (P2).

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a copying machine installed on the upper surface of a copying machine body having a platen glass, and conveys an original for copying to an original copying position on the upper surface of the platen glass, and copies a copy at the original copying position. The present invention relates to an automatic document conveyance device for a copying machine that includes a document conveyance means for automatically conveying a document to a document discharge tray.

0002

2. Description of the Related Art Recently, as copying machines have become faster and more automated, automatic document feeders for copying machines have come into use that automatically feed multiple sheets of originals one after another to the original copying position on the top of the platen glass. It's here. This type of automatic document feeder for a copying machine is rotatably supported on the copying machine body via a frame support means between an open position away from the platen glass and a copying position close to the platen glass. A frame is provided, and the frame allows a document setting section into which a document to be copied is set, a document ejection tray into which a copied document is ejected, and a document placed in the document setting section to be placed on the upper surface of the platen glass. and a document conveying means for conveying the copied document to the document copying position and conveying the copied document copied at the document copying position to the document ejection tray. The document conveying means normally uses a document conveying belt to convey the document to a document copying position on the top surface of the platen glass of the main body of the copying machine, with the copy surface facing downward.

0003

SUMMARY OF THE INVENTION The automatic document feeder for a copying machine is used by being installed on the top surface of the main body of the copying machine. Since the area of the top surface of the copying machine body is limited, if the original document setting section and the document ejection tray are installed on the same plane, the automatic document feeder for the copying machine will be located laterally than the side surface of the copying machine body. There was a problem that it would stick out.

[0004] Therefore, the above-mentioned problem can be solved if the original document setting section and the original document ejection tray are placed one above the other in the vertical direction. However, for example, if the original ejection tray is placed below the original setting section, it is easy to set the original, but it is difficult to take out the copied original that has been ejected to the original ejection tray. occurs. Furthermore, if the document setting section and the document discharge tray, which are arranged one above the other in the vertical direction, are arranged upside down, a problem arises in that it becomes difficult to set the document.

In view of the above-mentioned problems, the present invention has an original setting section for setting originals to be copied, an original ejection tray for ejecting copied originals, etc., and the present invention is designed to fit onto the upper surface of the copying machine main body, which has a limited installation area. An object of the present invention is to make it possible to easily perform both the work of setting a document and the work of taking out a copied document in an automatic document feeder for a copying machine installed in a machine.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned problems, an automatic document feeder for a copying machine according to the present invention has the configuration described below. In the description of the present invention, in order to easily understand the correspondence with the constituent elements of the embodiments described later, the same reference numerals as those of the corresponding embodiments are used for the constituent elements of the present invention. Enclose and write. The parenthesized symbols attached to the constituent elements of the present invention should be referred to in order to facilitate understanding of the present invention, and should not be interpreted as limiting the present invention to the examples. Should not be referenced. In order to solve the above problem, an automatic document feeder for a copying machine according to the present invention is provided with a copying machine body (A) having a platen glass (A1) on the top surface, an open position away from the platen glass (A1), and an open position away from the platen glass (A1). A frame (F) is rotatably supported between a copying position close to a platen glass (A1), and an original setting section (T1) sets an original to be copied on the frame (F).
, an original ejection tray (T2) from which the copied original is ejected;
and the original set in the original setting section (T1) (
A document conveying means (H) for conveying the copied document (G) to the document copying position on the upper surface of the platen glass (A1) and conveying the copied document (G) copied at the document copying position to the document ejection tray (T2); In the supported automatic document feeder for a copying machine, the document ejection tray (T2) is placed at a document storage position (P1) located above the document setting section (T1) and separated from above the document setting section (T1). a tray supporting means (Ts) rotatably supported between the upright position (P2) and a document storage position holding means (14b) for holding the document ejection tray (T2) at the document storage position (P1); , upright position holding means (16, 17) that holds the document ejection tray (T2) at the upright position (P2).
).

[0007]

[Operation] When using the automatic document feeder for a copying machine of the present invention having the above-mentioned configuration, when setting a document (G), the document ejection tray (T2) is moved from the document setting section (
T1) Rotate to the standing position (P2) away from above. In this state, there is nothing above the document setting section (T1) that will obstruct the document setting operation, so the document setting operation can be performed easily. After setting a document (G) in the document setting section (T1), the document discharge tray (T2) is rotated from the upright position (P2) to the document storage position (P1). When a copying operation is executed in this state, the document conveying means (H) conveys the document (G) set in the document setting section (T1) to the document copying position on the top surface of the platen glass (A1). The copied original (G) that has been copied at the original copying position is conveyed to the original output tray (T2). Therefore, when the copying operation is completed, the copied original (G) is placed on the original discharge tray (T2). The document output tray (T2
) Since there is nothing obstructing the document output tray (T2), the document (G) placed on the document discharge tray (T2) can be easily taken out.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Note that in the figure, the direction of arrow X1 indicates the normal conveyance direction (ie, forward direction) of the document. FIG. 1 is a diagram showing a state in which an embodiment of an automatic document feeder B for a copying machine according to the present invention is installed on the top surface of a copying machine main body A. Figure 2
is an enlarged sectional view of the automatic document feeder B shown in FIG. 1, FIG. 3 is a view taken from arrow III in FIG. 2, and FIG.
FIG. 5 is a sectional view taken along the line IV-IV of the automatic document feeder B.
6 is a sectional view taken along the line VI-VI in FIG. 2, and FIG. 7 is a registration sensor S3 and a document size sensor S4 disposed in the document conveyance path of the automatic document feeder B.
It is an explanatory diagram of S5.

In FIG. 1, an automatic document feeder B for a copying machine according to an embodiment of the present invention is installed on the top surface of a platen glass A1 on the main body side of a main body A of the copying machine. The automatic document feeder B includes a document setting section T1 on which documents G of various sizes to be copied are stacked, a document discharge tray T2 from which copied documents G are discharged, and the document setting section T1.
a document transporting means H for sequentially taking out the originals G set on the platen glass A1 and transporting them to the original copying position on the platen glass A1, and transporting the copied originals G that have been copied at the original copying position to the original document ejection tray T2; We are prepared. The document setting section T1, document ejection tray T2, document conveyance means H, etc. of the automatic document feeder B are supported by a frame F. This frame F is shown in Figs.
5.

In FIGS. 2, 4, and 5, the frame F is composed of a flat front frame F1, a rear frame F2, and a pair of tie plates F3, F3 connecting the two frames F1, F2. A frame tip abutting member 1 is provided at the lower end of the front frame F1. This frame tip abutment member 1 comes into contact with the top surface of the copying machine main body A to maintain the position (height) of the top end of the frame F relative to the top surface of the copying machine main body A at a predetermined value. Further, a similar frame base end abutment member 2 is provided at the lower end of the rear frame F2. The tie plate F3 has a horizontal upper wall 3 and a pair of side walls 4, 4.
It is formed into a substantially inverted U-shape in cross section. As shown in FIG. 5, hinge pin insertion holes 4a, 4a are formed in the intermediate portion of the tie plate F3. An opening 5 is formed in the rear frame F2 at a connecting portion with the tie plate F3, and a tip end portion of a rotating arm 6 having a substantially U-shaped cross section is inserted into the tie plate F3 through the opening 5. is configured to be

Hinge pin insertion holes 6a, 6a are formed at the distal end of the rotation arm 6, and rotation shaft insertion holes 6b, 6b are formed at the base end. A rotation shaft 7 (see FIG. 4) is inserted and fixed into the rotation shaft insertion holes 6b, 6b of the rotation arm 6, and this rotation shaft 7 is connected to a support bracket fixed to the upper surface of the copying machine main body A. It is rotatably supported by 8. The hinge pin insertion holes 6a, 6a at the tip of the rotating arm 6 and the hinge pin insertion holes 4a, 4a (see FIG. 5) of the tie plate F3 are connected to the hinge pin, that is, the hinge connecting member 9 (see FIGS. 2, 4, 5). (see).

Therefore, the rotating arm 6 and the frame F are connected by the hinge connecting member 9 so as to be relatively rotatable. The frame support means U is constituted by the components indicated by the above-mentioned numerals 6 to 9, etc. In the state shown in FIG. 4, the frame front end contact member 1 and the frame base end contact member 2 contact the upper surface of the copying machine main body A, and the position (height) of the frame F relative to the upper surface of the platen glass A1 is adjusted. is held in place. Holding the frame F at the predetermined position in this way is necessary in order to press the original G against the platen glass A1 with a predetermined pressure.

The relative rotatable amount between the rotating arm 6 and the frame F is restricted for the following reasons. That is, when the front frame F1 is lifted from the state shown in FIG. 4, the frame F rotates clockwise relative to the pivot arm 6 about the hinge connection member 9. During the relative rotation, the rotating arm 6 is attached to the base end (right end in FIG. 4) 3a of the upper wall 3 of the frame F.
When the upper edges of the frame F and the rotating arm 6 come into contact with each other, no further relative rotation between the frame F and the rotating arm 6 is performed. Further, when the frame F rotates counterclockwise relative to the rotating arm 6 around the hinge connecting member 9, the tip 6c of the upper edge of the rotating arm 6 (the left end in FIG. 4) When the frame F comes into contact with the upper wall 3 of the frame F, no further relative rotation between the frame F and the rotating arm 6 takes place. In this way frame F
The amount of relative rotation between the rotary arm 6 and the rotary arm 6 is regulated. Therefore, the proximal end of the upper wall 3 of the frame F (Fig.
the upper edge of the rotating arm 6 that contacts this, the tip (left end in FIG. 4) 6c of the upper edge of the rotating arm 6, and the upper edge of the frame F that contacts this. The wall 3 constitutes a rotatable amount regulating means R of this embodiment. The rotatable amount regulating means R is disposed between the frame F and the rotating arm 6, and regulates the relative rotatable amount thereof around the hinge connecting member 9.

The frame F includes various other components of the automatic document feeder, such as a front cover K1, a main cover K2, a rear cover K3, and a document feeder H (which will be described in detail later) as shown in FIG. ) etc. are supported.

2, 3, 4, 6, and 7, the main cover K2 is formed with an original setting portion T1 for placing an original G for copying.
1 is formed with a recess 11 into which the fingers of the hand are inserted when handling the placed document G. The main cover K2 also supports a document output tray T2 so as to be rotatable between a document storage position (the position shown by the solid line in FIG. 2) P1 and an upright position (the position shown by the two-dot chain line in FIG. 2) P2. bearing hole 13 for
13 (see FIGS. 3 and 6). The document ejection tray T2 includes a tray body 14 and a tray body 14.
An auxiliary tray 15 is provided at the distal end of the tray 15, which is supported movably between a storage position (solid line position in FIGS. 2 and 3) and a protruding position (double-dashed line position in FIGS. 2 and 3). This auxiliary tray 15
is moved to the protruding position and used when the document G to be discharged is large (long) in shape.

The tray body 14 has protruding shafts 14a, 14a inserted into the bearing holes 13, 13 at its base end.
and a pair of leg portions 14b, 14b (Fig. 6
). The pair of legs 14b, 14b
This constitutes the document storage position holding means of this embodiment. Tray support means Ts (FIGS. 3 and 6
) is configured.

The protruding shafts 14a of the tray body 14 are inserted into the bearing holes 13, 13 provided in the main cover K2.
14a, the tray body 14 is bent to bring the distance between the protruding shafts 14a, 14a closer to each other so that it is narrower than the distance between the bearing holes 13, 13. In this state, the protruding shaft 14 is placed between the bearing holes 13, 13.
a, 14a, and the tray body is released from the curved position to be in a flat state. Then, the protruding shafts 14a, 14a of the tray body 14 are inserted into the bearing holes 13, 13 provided in the main cover K2.

A pair of magnets 16 are fixed to the upper surface of the base end of the tray body 14. those magnets 1
Reference numeral 6 denotes a pair of magnetic metal plates 1 fixed to the main cover K2 when the document ejection tray T2 is in the upright position.
7 and acts to hold the document ejection tray T2 in the upright position. Therefore, the magnet 16 and the magnetic sheet metal 17 constitute the standing position holding means of this embodiment.

Next, the original G placed on the original setting section T1 is conveyed to the original copying position on the platen glass A1, and the copied original G is transferred to the original output tray T2.
The document conveying means H that discharges the document will be explained. Figure 2
In this case, the document conveyance means H has a first conveyance path 21 connected to the document setting section T1. The first transport path 21 is provided with a document presence sensor S1 that detects the presence or absence of a document G placed on the document setting section T1, and a nudger roll 22 that sequentially takes out the document G. This nudger roll 22 is detected by a nudger roll home sensor S2 that detects its attitude, and is held in a predetermined attitude when not in operation. A sorting roll device 24 is provided between the first conveyance path 21 and the second conveyance path 23 connected thereto. Sorting conveyance roll device 2
4 has a drive roll 24a and a non-rotatable retard roll 24b, and takes out the documents G conveyed through the first conveyance path 21 by the nudger roll 22 one by one into the second conveyance path 23. It has the role of transporting vehicles.

A registration roll device 26 is provided between the second conveyance path 23 and the third conveyance path 25 connected thereto. The registration roll device 26 has a drive roll 26a and a pinch roll 26b, and has the role of transporting the document G, which has been transported through the second transport path 23 by the sorting roll device 24, within the third transport path 25. are doing. The surfaces of each of the rolls 26a and 26b form a frictional contact surface with the document G being conveyed.
When the drive roll 26a rotates with the document G being supplied between the friction contact surfaces a and 26b, the document G is conveyed in the direction of movement of the friction contact surfaces.

FIG. 7 is an explanatory diagram of the inside of the second conveyance path 23. In FIG. 7, the straight line indicated by the reference numeral 26 indicates the position of the register roll device 26 (hereinafter, this position will be referred to as the "pre-registration position").
), and reference numeral 27 indicates a guide wall for positioning and guiding one side edge of the document G being conveyed through the second conveyance path 23 . As shown in Figure 7, the second
The conveyance path 23 has a length of 14 m in front of the register roll device 26.
A registration sensor S3, and a first size sensor S4 and a second size sensor S5 for detecting the size of the document G are disposed at a position m. Therefore, 14 m after the registration sensor S3 detects the front end of the transported document G.
When the original G is conveyed by m, the front end of the original G reaches the position of the registration roll device 26, that is, the pre-registration position. Normally, the document G currently being copied is held at the document copying position on the platen glass A1, and the document G to be copied next is configured such that its front end stops at the pre-registration position and waits. Hereinafter, the position of the original G in which the front end of the original G is stopped at the pre-registration position will also be referred to as the original standby position.

The registration sensor S3 is connected to the guide wall 27.
It is located 80mm away from the Further, the first size sensor S4 is connected to the guide wall 27 to 236.
The third size sensor S5 is arranged at a distance of 288 mm from the guide wall 27. When the document G is conveyed while being guided along one side edge by the guide wall 27 of the second conveyance path 23, the width size of the document G can be detected by detecting the other side edge. For example, the width is 236m
Originals G with a width of m or less are small size width, and originals G with a width exceeding 236mm and 288mm or less are medium size width with a width of 288mm.
If the document G that exceeds the width of the document G is a large document, the width of the document G can be detected from the combination of the detection signals of the size sensors S4 and S5.

The lengthwise size of the original G is detected from the amount of transport of the original G from when the registration sensor S3 detects the front end of the original G until when the registration sensor S3 detects the rear end of the original G. Then, on the side of the copying machine main body A, a copy sheet corresponding to the detected size of the original document G is taken out from the copy paper tray and a copy is made. Furthermore, when a large number of original documents G are placed on the original document setting section T1 at one time, a high-speed copy mode is provided as a method for successively copying the plurality of original documents G. In this high-speed copying mode, when copying the nth original G, n+1
In addition to transporting the original sheet to the original standby position, it is also necessary to transport the (n+1)th sheet of copy paper to the paper standby position on the copying machine main body A side. However, when the (n+1)th document G is in the document standby position,
Since the rear end of the original G has not reached the position of the registration sensor S3, the lengthwise size of the (n+1)th original G is still unknown. In this way, in the high-speed copy mode, it is necessary to take out the copy sheet corresponding to the document G from the tray and transport it to the paper standby position in a state where the size of the document G is unknown. Therefore, in the high-speed copying mode, the length of the first transported original G among the many originals is detected, and the length of the second and subsequent originals G is the same as the first transported original G. The copy paper is selected based on the size of the original.

A registration gate 28 is provided below the third conveyance path 25 and is rotationally controlled around a shaft 28a by a solenoid (not shown). This regigate 28
is normally held in the state shown in FIG. 2, but is rotated downward from the state shown in FIG. 2 when the document G is reversed for double-sided copying. Said third conveyance path 25
The fourth conveyance path 31 connected to the platen glass A
1 and a conveyor belt 32 disposed in contact with the upper surface. A register position is set in this fourth conveyance path 31. This registration position is the position where the rear end of the original G is placed when the original G is conveyed to the copying position on the platen glass A1, that is, the original reading start position. A main body side registration sensor Sg is arranged to detect the position of. Hereinafter, the position of the original G in which the trailing edge of the original G is stopped at the registration position will be referred to as the original copying position. Placing the original G at the original copying position is carried out by transporting the original G by a predetermined amount from the original waiting position.

The conveyor belt 32 is an endless belt, and is wound between a belt drive roll 33 and a free roll 34. The belt driven roll 33 and the free roll 34
A plurality of pressure rolls 35 are arranged between. These pressure rolls 35 press the conveyor belt 32 against the upper surface of the platen glass A1 with a predetermined pressure.

A fifth conveyance path 36 is connected to the fourth conveyance path 31 . A discharge side conveyance roll device 38 is provided between the fifth conveyance path 36 and the sixth conveyance path 37 connected thereto. The discharge side conveyance roll device 38 is
It has a drive roll 38a and a pinch roll 38b, and has the role of transporting the document G, which has been transported through the fifth transport path 36 by the transport belt 32, within the sixth transport path 37.

A document ejection sensor S6 for managing the ejection of the document G is disposed in the middle of the sixth conveyance path 37.
A discharge roll device 39 is disposed at the end of the sixth conveyance path 37. The discharge roll device 39 includes a drive roll 39
a and pinch rolls 39b, and has the role of discharging the document G conveyed through the sixth conveyance path 36 by the discharge side conveyance roll device 38 onto the discharge tray T2.

Further, as shown in FIG. 2, the document conveying means H is
It includes a double-sided copying conveyance path 40 used when performing double-sided copying, and double-sided copying conveyance roll devices 41 and 42 disposed along the double-sided copying conveyance path 40. Further, the document transport means H includes a manual document insertion slot 43 and a manual document transport path 44 that connects the manual document insertion port 43 and the second transport path 23 . The manual document transport path 44 is provided with a manual document transport roll device 45, a manual document sensor S7, and the like.

The document conveying means H is constituted by the components indicated by the numerals 21 to 45.

Next, the operation of an embodiment of the automatic document feeder for a copying machine according to the present invention having the above-described configuration will be explained. When using the automatic document feeder B for a copying machine of this embodiment having the above-described configuration, when setting a document G, the document ejection tray T2 is rotated to a standing position P2 that is away from above the document setting section T1. make it move. In this state, there is nothing above the document setting section T1 that will obstruct the document setting operation, so the document setting operation can be performed easily. Said original setting section T
After setting the original G on the original output tray T2,
is rotated from the upright position P2 to the document storage position P1. When a copying operation is executed in this state, a large number of originals G placed on the original setting section T1 are transported along the first transport path 21 by the nudger roll 22, and one by one the originals G are transferred by the sorting roll device 24. 2 conveyance path 23.

For example, in the high-speed copying mode, the first document G among the plurality of documents G is conveyed to the document copying position on the platen glass A1, but the registration sensor S3 of the second conveyance path The size in the length direction is detected by the conveyance amount from when the front end is detected to when the rear end is detected. Further, the size sensor S of the second conveyance path
4, the size in the width direction is detected by S5. Then, on the copying machine main body A side, a copy sheet corresponding to the size of the document G is taken out from the paper tray and conveyed to a toner transfer position. While the first original G is being copied, the next original G is conveyed to the original standby position, and the next original G is copied on the copying machine main body A side. The paper is taken out from the tray and conveyed to a paper standby position (that is, a position before the toner transfer position).

When copying the second and subsequent originals G, the original G is conveyed a relatively short distance from the original standby position and reaches the original copying position, and the copy paper is also transferred to the original standby position. Since the toner is conveyed a relatively short distance from the toner transfer position to the toner transfer position, copying is performed at high speed. Further, when conveying the second and subsequent documents G to the document copying position, the registration roll device 26, the conveyance belt 32,
Discharge side transport roll device 38 and discharge roll device 39
are driven at the same time, the copied originals G are simultaneously discharged by the conveyor belt 32. When the original G is transported from the original standby position to the original copying position, the transport belt 32 stops. At this time, the copied original G has not yet been discharged to the discharge tray T2. The copied original G is detected by the original discharge sensor S6, and the discharge side transport roll device 38 and the discharge roll device 39 are operated until the discharge is completed.

The ejection side transport roll device 38 and the ejection roll device 39 need force to pull out the copied original sandwiched between the stopped transport belt 32 and the upper surface of the platen glass A1. Therefore, the discharge side transport roll device 38 and the discharge roll device 39 are given a torque that satisfies the above requirements. Since the document G to be copied next is placed at the document copying position between the stopped conveyor belt 32 and the top surface of the platen glass A1, the conveyor belt 32 moves when pulling out the copied document G. Then, the original G at the original copying position also moves. Therefore, it is necessary to prevent the conveyor belt 32 from moving when pulling out the copied original G. For this purpose, a stepping motor is used as a drive motor (not shown) for the conveyor belt 32. Since the stepping motor has a braking force acting on its rotating shaft due to the magnetic force acting from the stator side, the conveyor belt 32 can be prevented from moving when the copied original G is pulled out.

It is also possible to use a motor other than a stepping motor, such as a DC servo motor, as the drive motor (not shown) for the conveyor belt 32, but in that case, when the copied original G is pulled out. In some cases, it is necessary to provide a braking force applying means for applying an appropriate braking force to the conveyor belt 32.

[0035] When the copying work is completed as described above,
A copied original G is placed on the original discharge tray T2. Since there is nothing obstructing the document discharge tray T2 above, the document G placed on the document discharge tray T2 can be easily taken out.

In the automatic document feeder for a copying machine according to the first embodiment, which is equipped with the above-mentioned document feed means H, the frame F is attached to the tip end side of the rotating arm 6 which is rotatably supported by the copying machine main body A. rotatably connected to the parts. Therefore, the automatic document feeder for the copying machine is at the copying position (the position shown in FIG. 4).
, the frame F rotates around the hinge connection member 9 at the tip side of the rotating arm 6, and the frame tip contact member 1 at the lower end of the front frame F1 (lower tip of the frame F). Both the frame proximal end abutting member 2 of the rear frame F2 (the lower proximal end of the frame F) abut against the upper surface of the copying machine main body. Therefore, frame F
The platen glass A of the distal end portion and proximal end portion of
1. Positioning in the height direction with respect to the top surface can be easily performed. In this way, the frame F relative to the top surface of the platen glass A1
When the positioning in the height direction is performed, the positioning of the document conveying means H supported by the frame F in the height direction with respect to the upper surface of the platen glass A1 is also performed at the same time.

As described above, when the height of the document transport means H held by the frame F relative to the top surface of the platen glass A1 is determined, the distance between the transport belt 32 of the document transport means H and the top surface of the platen glass A1 is determined. Incidentally, the pressing force acting on the original G that is transported by the original transport means H to the original copying position on the upper surface of the platen glass A1 and pressed against the upper surface of the platen glass A1 by the transport belt 32 is due to
is determined by the height relative to the upper surface of the platen glass A1. Therefore, by attaching the document conveying means H at a predetermined height with respect to the frame F,
The pressing force with which the conveyance belt 32 presses the original G against the upper surface of the platen glass A1 can be easily set to an appropriate value.

Furthermore, the frame F and the rotating arm 6
The relative rotatable amount with respect to the rotatable amount regulating means R
regulated by. Therefore, the frame F
When attempting to rotate the frame F between an open position away from the platen glass A1 and a copying position close to the platen glass A1, the frame F is rotated around the hinge connecting member 9 with respect to the rotation arm 6. , they rotate relative to each other by an amount regulated by the rotatable amount regulating means R, but no further relative rotation occurs. Therefore, when it is attempted to further rotate the frame F, the frame F rotates around the base end portion of the rotary arm 6.
rotates with. Therefore, the frame F can be easily rotated between an open position away from the platen glass A1 and a copying position close to the platen glass A1.

Although the embodiments of the automatic document feeder for a copying machine according to the present invention have been described in detail above, the present invention is not limited to the above embodiments, and the present invention as set forth in the claims Various minor design changes can be made without deviation. For example, the tray support means Ts is
Instead of the bearing holes 13, 13 provided in the main cover K2 and the protruding shafts 14a, 14a provided in the tray body 14, a protruding shaft is provided in the main cover K2 and a bearing hole is provided in the tray body 14. It is also possible to do so. Further, the auxiliary tray 15 can also be omitted. Furthermore, various means other than those shown in the embodiments can be employed as the means for holding the document ejection tray T2 at the document storage position and the means for holding it at the upright position.

[0040]

Effects of the Invention The above-described automatic document feeder for a copying machine of the present invention has a state in which the document ejection tray is rotated to an upright position away from above the document setting section. Since the original can be set without anything interfering with the original setting work, the original setting work can be performed easily. Further, since there is nothing obstructing the upper part of the original ejection tray from which the copied original has been ejected, the original placed on the original ejection tray can be easily taken out.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a state in which an embodiment of an automatic document feeder B for a copying machine according to the present invention is installed on the top surface of a copying machine main body A.

2 is a front cross-sectional view of the automatic document feeder B shown in FIG. 1. FIG.

FIG. 3 is a view seen from arrow III in FIG. 2;

4 is a sectional view taken along the line IV-IV in FIG. 2, and is a side sectional view of the automatic document feeder B. FIG.

FIG. 5 is an exploded perspective view of the frame of the automatic document feeder B. FIG.

6 is a sectional view taken along the line VI-VI in FIG. 2; FIG.

FIG. 7: Registration sensor S3 and document size sensors S4 and S5 arranged in the document conveyance path of the automatic document feeder B.
FIG.

[Explanation of symbols]

A　Copier main body A1 platen glass B. Automatic document feeder for copying machines F Frame F1 front frame F2 rear frame F3 tie plate G　Document transport device H Original transport means K1 Front cover K1 Main cover K1 Rear cover P1 Original storage position P2 Standing position R　Rotatable amount regulating means S1 Original sensor S2 Nudger roll home sensor S3 Register sensor S4 1st size sensor S5 2nd size sensor S6 Original discharge sensor S7 Manual feed original sensor Sg Main body side register sensor T1 Original setting section T2 Original output tray Ts Tray support means U Frame support means 1 Frame tip contact member 2 Frame base end contact member 3 Upper wall 4 Side wall 4a Hinge pin insertion hole 5 Opening 6 Rotating arm 6a Hinge pin insertion port 6b Rotation shaft insertion port 6c Upper edge tip 7 Rotation axis 8 Support bracket 9 Hinge connection member 11 Recessed part 13 Bearing hole 14 Tray body 14a Protruding shaft 14b Legs 15 Auxiliary tray 16 Magnet 17 Magnetic sheet metal 21 First conveyance path 22 Najar Roll 23 Second conveyance path 24 Sorting roll device 24a Drive roll 24b Retard roll 25 Third conveyance path 26 Cash register roll device 26a Drive roll 26b Pinch roll 27 Guide wall 28 Regigate 28a axis 31 4th conveyance path 32 Conveyor belt 33 Belt driven roll 34 Free roll 35 Pressure roll 36 5th conveyance path 37 6th conveyance path 38 Discharge side conveyance roll device 38a Drive roll 38b Pinch roll 39 Discharge roll device 39a Drive roll 39b Pinch roll 40 Conveyance path for double-sided copying 41 Conveyance roll device for double-sided copying 42 Conveyance roll device for double-sided copying 43 Manual feed original insertion slot 44 Manual document feed path 45 Manual feed document transport roll device

Claims (1)

[Claims] 1. A copying machine main body (A) having a platen glass (A1) on the top surface is provided with a rotating mechanism that rotates between an open position away from the platen glass (A1) and a copying position close to the platen glass (A1). A frame (F) is movably supported, and the frame (F) includes an original setting section (T1) for setting an original to be copied, an original ejection tray (T2) for ejecting a copied original, and the original. The original (G) set in the setting section (T1) is conveyed to the original copying position on the top surface of the platen glass (A1), and the copied original (G) is copied at the original copying position.
) in an automatic document feeder for a copying machine in which a document conveying means (H) for conveying documents to the document discharge tray (T2) is supported, in which the document discharge tray (T2) is conveyed to the document setting section (T2).
T1) tray support means (Ts) rotatably supported between a document storage position (P1) arranged above and an upright position (P2) remote from above the document setting section (T1);
The document ejection tray (T2) is moved to the document storage position (P1).
); and upright position holding means (16, 17) to hold the ejection tray (T2) at the upright position (P2). automatic document feeder.