JPS6097345A - Image forming device - Google Patents

Abstract

PURPOSE:To place an original in an exposure position on an original placing member easily and accurately when the original is placed manually, by providing an original positioning member which can be projected from and drawn back to the surface of the original placing member and providing an original size display on the surface of the original positioning member. CONSTITUTION:An original stopping means 104 which stops the carried original in a prescribed position on a platen glass 204 to expose the original to light is so provided that it can be projected from and drawn back to the surface of the platen glass 204. When an operator detaches an original carrying device from the surface of the platen glass 204 and places directly the original on the surface of the platen glass 204 manually, he brings the front end of the original into contact with a positioning part 104a and positions the original on a basis of a size display sticker 104B, which is stuck to the upper face of a positioning member 104, with respect to the breadthwise direction and places the original in an exposure position Q1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus equipped with an automatic document feeding function.

[Technical background of the invention and its problems] This type of image forming apparatus, for example, sequentially conveys stacked originals one by one onto an original placing member, such as an original platen glass, and exposes the originals. In addition to copying based on the image, it is also possible to copy based on the exposed image of the document placed directly on the document table glass by the sweeper. Such a copying machine is equipped with a copying machine main body that performs copying based on the exposed image of the original on the document platen glass, and a document supply unit that sequentially takes out the stacked originals one by one and the surface of the document platen glass. A document feeding device is provided, which includes a document conveying section that can be moved toward and away from the document supplying section and conveys the document from the document supplying section onto the surface of the document table glass for exposure processing by the main body of the copying machine.

In addition, when the document feeder automatically feeds the document, in order to stop the document at the exposed position on the document table glass, the document being conveyed is brought into contact with the document and is moved against the conveyance force from the document conveyance unit. A collar was provided to stop the original at the exposure position.

By the way, this stopper is not only used when automatically feeding the original, but also as a reference when placing the original at the exposure position when the operator places the original directly on the platen glass for copying. be done.

However, in conventional devices, when manually placing various 1-size originals, the standard is not set in the direction that intersects the document conveyance direction. 1 cannot be performed accurately and easily.

"Object of the Invention" The present invention has been made in view of the above circumstances, and its purpose is to easily and accurately place the original at the exposure position on the original placing member when placing the original manually. The object of the present invention is to provide an image forming apparatus that can perform the following steps.

[Summary of the Invention] The present invention comprises: an image forming apparatus main body that forms an image based on an exposed image of a document on a document platform; a document transport section that transports the document onto the surface of a document support member; A document positioning member that can protrude and retract from the surface of the document support member in order to bring the document conveyed by the document conveyance unit into contact with the document and stop it at a predetermined position; It is characterized by comprising the following.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention applied to a copying machine equipped with an automatic document feeding function. In the figure, 201A indicates an image forming apparatus main body, such as a copying machine main body, which forms an image based on an exposure image of a document.

Note that this internal structure is well known, so a detailed explanation thereof will be omitted. A document feeder 201B is provided above it. The document feeder 201B includes at least a document supply section 202 and a document transport section 203. The document supply unit (hereinafter also simply referred to as a separating and feeding device) 202 is a device that sequentially feeds stacked paper sheets, such as documents, one by one, starting from the outermost layer, for example, the top layer. One end of the sent document is attached to the copying machine body 2.
A document carrying unit (hereinafter also referred to as a conveying device) 203, which is provided in the copying machine main body 201A and pivotally supported on the back side of the copying machine body 201A, can move the document table glass 204 toward and away from the document table glass 204. The document is sent to a predetermined position (exposure position) on the document tray 204, and after the copying of the 1 quintillion manuscript is completed, the document is sent to the document tray 205. Note that d3 in the figure, which is not indicated by 104, is a document conveyed onto the document platen glass 204 by, for example, the conveyance device 20.
This document stopping means positions and stops the document at the exposure position against the conveyance force of No. 3, and is arranged in a direction intersecting the conveyance direction of the document so as to be adjustable in position. The detailed structure will be described later. In this way, by passing through the separation and feeding device 51202, new documents are sent one after another and are provided for C copying. In addition, in the separation feeding device 202, 8! !
The configuration of the placement unit 206 on which the original document is placed is as follows. That is, a mounting table 206B forming a part of the bottom surface of the stack 206A capable of accommodating a plurality of originals at once in an inclined state is provided in an inclined state. A pair of side regulating plates 206C are disposed on the upper surface of the mounting table 206B and are slidable in a direction perpendicular to the feeding direction depending on the document size. Further, at the inclined upper end part, when setting the original in the transverse direction, it can be rotated and stored on the mounting table 206B as shown by the solid line in the first figure, and when setting the original in the longitudinal direction, the first As shown by the two-dot chain line in the figure, a document support member 206D is pivotally attached, which is rotated by approximately 150 degrees and constitutes an extension of the mounting table 206B.

Here, the internal mechanism of the separation and feeding device 202 will be explained based on FIG. 2(a), which is a schematic side view, and FIG. 2(b), which is a partial perspective view. . In the figure, the reference numeral 206B is the placement table, on which originals P are placed in a stacked state. As shown in FIG. 2(a), the placed document I] is moved by a stopper (which positions and regulates the placed paper sheets) that can swing in the direction of arrow AI and A2.
When the positioning restriction is released, this is an example of a positioning and pressing part that presses paper sheets in a four-layer state as if opening a hole, and also prevents the document on the mounting table 206B from sliding down due to its own weight. When this stopper 10 rotates in the direction of arrow Δ1 shown in FIG. 2(a), the document P slides diagonally downward under its own weight.

A friction braking member such as a urethane rubber sheet 101 is placed on the guide plate 100 via the third mylar guide 15G and comes into contact with the leading edge of at least a part of the document that has slipped down in the stacked state. (Figure 2 (1)
). Konniuna Urethane Rubber Sheet 1-101
If a document is placed in a stacked state and falls down, it will be affected by its own weight.
: The entire body will not slide sideways to the left in Figure 2 (a) due to frictional braking. Thereafter, when the original is rotated in the direction of arrow A2 shown in FIG. A feeding unit, for example, a feeding U-ra 11, is provided which reliably feeds the original forward by contacting the edgemost layer of the pressed original. Furthermore, this feed roller 11 and the stopper 10
Separation feed fll which separates the highest layer of the original from the other originals and sends it to the destination! 12
A pair of registration rollers 13△, 1 are provided at the other end of the document.
3B, and after timing t' for transporting the original is determined, the original is transported to h on the original platen glass 204. In addition, as shown in FIG. 2(a), this feed roller 11 is located in front of the feed roller 11.
the first Mylar guide 15AIfi in the direction of contact.
The originals in the 11th layer in the stacked state can be placed smoothly on the placing table 6B even if the leading edge in the direction of travel is curled in a concave manner. Moreover, a take-out roller 56 (
A second Mylar guide L5B is provided in the tangential direction of the paper (details will be described later), and is fed by the third Mylar guide 15C and the Aimatsu C feed roller 11, etc. to smoothly and reliably move the document. It can be sent to the separation and feeding section 12. Further, at the tip of the third Mylar guide 15C, there is a fourth guide bent in the shape of approximately 1.
A mylar guide 15D is provided facing the upper guide 103 (see also FIG. 2(b)). Therefore, the document taken out and conveyed from the separating and feeding section 12 is made into a convex shape at the top by the fourth mylar guide 151] and the upper kite 103, and its tip N; is transferred to the pair of registers 1 by the roller 13A. , 13B. Note that the tip of the fourth mylar guide 151 is not fixed (with respect to the conveyance direction of the document), so that it becomes substantially flat when pressed from above;

Next, the apparatus of this embodiment will be explained in detail with reference to FIG. 3, which shows the drive system of the separating and feeding apparatus.

The device of this embodiment has the stopper 10.3. ! Penetration 0
- roller 11, separation feeding section 12 and registration roller 13Δ,
13B and conveyor bells 1 to 71 (described later), etc., are selectively driven by forward and reverse rotation of one drive source. For this purpose, first, a driving source, for example, a motor 20 capable of forward and reverse rotation in the X1 and Y1 directions shown in the third figure, a first boolean 921Δ fixed to the motor shaft of this motor 20, and a first pulley 21A is required.
The second pulley 21[3, to which the rotation of is transmitted, and both pulleys 21Δ.

21B, a first IC timing belt 22A, a first idle gear 23A that rotates integrally with the second pulley 21B, and a second idle gear 23A that meshes with the first idle gear 23A.
An idle gear 23B, and a first shaft 25 that rotates integrally with the first dry gear 24A, such as a first drive 4''a 24A that meshes with the second idle gear 23B, are provided.
The first shaft 25 rotates in the x2 direction when the motor 20 rotates in the x1 direction, and rotates in the Y2 direction when the motor 20 rotates in the Y1 direction. Note that from the motor 20, the first
For details of the power transmission system up to drive gear 24A, see Part 4.
The structure is shown in an exploded perspective view and an assembled perspective view shown in Figures (a) and (b).

At the third right end of the first shaft 25 in the drawing, the Y of the first shaft 25 is
A second drive gear 2413 is fixed via a first one-way clutch 26Δ that transmits rotation in only two directions. Furthermore, this second drive gear 2 /I [3
The third drive gear 24C to which the rotation of
5, a fourth pulley 21D to which rotation is transmitted to the third pulley 2LC, and a second timing bell 1- stretched across both pulleys 21C, 21+). 22B and the fourth pulley 21D together with the arrow Y.
A take-out shaft 27 that rotates in four directions is provided.

Further, a first shaft 25 is located at the third left end of the second shaft 25 in the drawing.
The fifth pulley 21E is connected to the fifth pulley 21E via the second one-way clutch 26I3 that transmits only the rotation in the second illustrated arrow x two directions.
is fixed. Further, a sixth pulley 21F to which the rotation of the fifth pulley 21E is transmitted, both pulleys 21E,
Third timing bell 1 to 22 G installed on 21F
A second shaft 28 is installed at the right end of the second shaft 28 in the third diagram to rotate integrally with the sixth boot 921F in the three directions indicated by the arrows in the third diagram. Drive gear 24
D is fixed to the fifth drive gear 24E that meshes with the fourth drive gear 24D, and a first registration roller shaft 29 that is rotatable integrally with the jth drive gear 24E.
One of the registration rollers 13A described in FIG. 2 is mounted on the first registration roller shaft 29A and is rotatable in the direction of the third arrow X47j. J3, the other registration roller 13B explained in FIG. It is pressed by the registration roller 13A located at.

Further, a seventh pulley 21G is provided at the intermediate portion of the first shaft 25.
is fixed to the eighth pulley 211-1, and further the rotation from the seventh pulley 21G is transmitted, both pulleys 21G,
Fourth timing bell I-22 stretched to 211-1
1) has been established. This eighth pulley 21 I
As shown in FIG. 5(a), + is configured to be able to rotate integrally with a driving shaft 30△ having a through hole 30a and a coupling protrusion 3o1) at the other end, and is rotatably attached to a frame (not shown).
It is rotatably fitted to the supported driven shaft 30B through the through hole 30a and positioned to the right via the ring 301). Driven shaft 3
A spring clutch device 31 is installed between 0B and the first stop shaft 30A.

The details of the spring clutch device 31 are shown in Figure 5 (a).
) and (b).

FIG. 5(a) is an exploded perspective view, and FIG. 5(b) is an assembled sectional view. In each figure, what is indicated by 31△ is a first dynamic force transmission member (hereinafter also referred to as a driving boss member) that connects the cylindrical engagement surface 3', and has a coupling hole 31G provided at one end. The driving shaft @ 30A is inserted into the shaft and is configured to be able to rotate integrally with the -C driving shaft 30A via its coupling protrusion 30b. A coil-shaped clutch spring 311 has an extending part 31D formed by horizontally extending one end and an upright part 31E formed at the other end on the 3'th C cylindrical engagement surface. : is fitted on the outside. On the other hand, a sleeve 31J having a locking groove 310 for locking the upright portion 31E and a release protrusion 311-1 protruding from the outer periphery is loosely fitted to the outer periphery of the clutch spring 31F. The cylindrical engagement surface 31 externally fitted onto the inner diameter portion of the clutch spring 311 has a locking portion 31m into which the extended portion 311 of the clutch spring 31 is inserted and locked, and is inserted through a set screw 31M. A second power transmission member, for example, a driven boss portion U31N, which can rotate integrally with the driven shaft 3013 is provided. Furthermore, an active member such as a cam 4 is inserted through the driven wheel 30B and can be fixed to the driven boss member at any position relative to the rotational direction of the driven boss member.
4 is numbered. For example, the boss portion 44A of this cam 44 is rotatably inserted into a positioning hole 31P formed at the end of the driven boss member 31N, and is inserted into the driven boss member 31N via a set screw 31Q at a predetermined position. It is constructed so that it can be fixed. Further, near the sleeve 31J, as shown in FIG.
f! II F-lever 31S and this intermittent lever 31S
a biasing member 311- which rotationally biases the in the direction of the arrow c1;
A clutch disconnection section 31X is provided, which is composed of a solenoid 31W and a Ny-C, which rotate the disconnection lever 31S in the direction of arrow C2 against the biasing force of the i=J force section IJ31T. a3, this clutch disconnecting portion 31X and nθ sleeve 31J restricts the rotation of the clutch spring 31F, and the driving boss member 31Δ is connected to the driven boss member 31N.
An example of a power transmission regulating means for cutting off power transmission to the active end 31S' (fifth
(see figure (C)) is the release protrusion 311-1 of the sleeve 31J.
J to engage with and restrict the rotation of this sleeve 31J.
ζ power transmission is cut off. Rinawara, sleeve 31
When the rotation of J is restricted, the locking groove 3 of this sleeve 31J
Clutch spring 31F with one end locked to 1G
The rotation of the cylindrical engagement surface 3 of the driving boss member 31A is restricted.
1B slips on the inner diameter of clutch spring 31 [=,
Rotation is not transmitted to the driven boss member 31N. In this way, from the driving boss member 31A to the driven boss part IJ
When the power to 31N is cut off, the release protrusion 311-1 of the sleeve 31J always stops at a predetermined position, but the cam 44 causes a driven member such as the cam lever 43 (see FIG. 6) to periodically move. It is something that gives/)s +
Since the stop position of the lie is an important reference position, the cam 44
Between the displacement phase of 1 and the relative position of the release protrusion 31 I+, the 1st thread is extremely -C important. In this regard, in the spring clutch device 31, the cam 44 is connected to the driven boss member 3.
It can be fixed at any position relative to 1N (14 is formed -C, so there is a relative angular error between the locking groove 31G and the release protrusion 3114, the presence of the clutch spring 311- with respect to the upright part 31E, and the relative angular error of the part 31D). However, in their manufacturing process, the displacement phase of the cam when the power transmission is cut off can be easily adjusted.
Moreover, the adjustment can be made before the assembly of the spring clutch device 31 is completed. In such a spring clutch device 31, when the solenoid 31W is demagnetized, the active end 31S' of the intermittent lever 315 is connected to the sleeve 1.
31J's release protrusion 311".
1 At this time, the sleeve 31J shown in FIG.
Since the rotation of the driving boss member 31A is restricted, the cylindrical engagement surface 3113 of the driving boss member 31A slips on the inner diameter part of the clutch spring 31F, and the torque of the eighth boob 92111 is transmitted to the driven boss part 4431N) Not done. Also, when the solenoid 31W is energized, the active end 3 of the intermittent lever 31S
18' is disengaged from the release protrusion 311-1 of the sleeve 31J, so at this time, as shown in FIG.
), the sleeve 31J becomes free, and the torque of the eighth pulley 21 (N 30 L3 transmitted to.

Next, the stopper 10 is driven via the first shaft 25, the separation and feeding shaft 35, the take-out roller shaft 27, and the third shaft (general term for the driving shaft 30Δ and the driven shaft 30B) 30. , the feed roller 11 and the separation feed 12 will be explained in detail. The drive system of this part corresponds to the part 0 in FIG. 3, and corresponds to the part shown in FIG. 2(a).

FIG. 6 is a perspective view of the portion J shown in the third figure.

As shown in FIG. 6, the collar 10 is slightly swayed via a pin 41 which is set at one end of the stopper holding member 40 over a medium heat. +J (direction perpendicular to the sending direction of original 1). This is to uniformly press the document 4 at the tip of the stopper 10.

The other end of the stopper holding portion 4Δ40 is fixed to the cam lever shaft 42, and a cam lever 43 is attached to the end of this @l+4'2 (-J l:J.
A biasing member 44 is mounted on the cam lever 43 and constantly biases the cam lever shaft 42 to rotate in the direction A21j shown in the fourth figure. Then, the cam lever 43 is actuated to move the stopper 10 along the arrow AI shown in FIG. 6 and ff'2 (a).
The cam 44 is for swinging in the A2 direction, and the relative positional relationship thereof is as shown in FIG. As a result, the rotation of the cam 44 causes the stopper 10 to swing in the direction shown in FIG. 2(a) and FIG. Figure 2 (a
) [This document I] falls diagonally downward naturally, and then rotates in the direction of arrow A2, the back side of the fallen manuscript I is pressed at the stroke <10 and is pushed diagonally upward upward V
13 t.

As shown in FIGS. 3 and 6, the feed U-ra 11 is movably inserted through the middle part of a pair of arms 50 that are rotatably attached to the take-out roller drive shaft 27. A feed roller shaft 51 is provided (pulled and attached to both IMI fils of the feed roller shaft 51 so as to be integrally rotatable).
It is being taken. In order to drive the feed roller 11, a first drive sprocket is attached to the driven shaft 3013! A third one-way clutch 26G, in which the clutch A is integrally rotatably attached 4() and transmits only the rotation in the J arrow x5 direction shown in FIGS. 3 and 6 to the feed roller shaft 51. through the second drive sprocket l-
52B is installed on the feed roller shaft 51, and is connected to both sprockets 1-552.
- 53A is installed. However, C11) When the driven shaft 3013 is rotated in the 5 directions of the arrows shown in FIGS. 113 and 6, the IJ feed roller 11 rotates in the 6 directions of the It will be driven, and will come into contact with the top layer of stacked documents and send it forward by friction.The document is forcibly sent forward, so it is not shown in 21st PI (a). It can be reliably fed to the separation feeding section 12.

As shown in FIGS. 3 and 6, the separation feeding section 12 includes a take-out roller shaft 55 that is rotatably inserted into the vicinity of the free ends of the pair of arms 50, and both ends of the take-out roller shaft 55. The take-out roller 56 is integrally rotatably attached to the take-out roller 56, the fourth drive block 1-52D is fixed to the intermediate portion of the take-out roller shaft 55, and the take-out port 27 shown in FIGS. Through the fourth one-way clutch 26I that transmits rotation only in the direction of arrow Y4 shown in FIG. The second ladder chain 53B stretched on 52G and 52D, and the small 8J shown in Figure 3.
A limited power transmission mechanism 58 is installed on the separation feeding shaft 35 and transmits the rotational torque of the separation feeding shaft 35 within a certain range.
Torque is transmitted through C and a fractionating roller 59 disposed opposite to the take-out roller 56.
C leaks even if configured. d3 The pair of arms 50 are
Since the roller 56 and the roller 59 are forced by a force (not shown) (downward in FIG. 6), a constant force is applied to the roller 56 and the roller 59.

The limited power transmission 1jl lateral 58 is shown in Fig. ε) (a).

(1)), and the above part lo-ra 59
is made of resin with a rotatable tC outside + fi on the separation roller shaft 35! A spring join 1-62 is located on one end surface side of the CI-LABOS 61 and is fitted onto the separation roller shaft 35. One end of this spring joint 1-62 is fixedly held by a spring support member 63 attached to the separation roller shaft 35 at a fixed position J, and the other end of the spring joint 62 is is separation roller boss 6
A cylindrical portion 61a protruding from one end surface of the cylindrical portion 1 is fitted onto the outside with its inner diameter portion being squeezed. and,
Inner diameter part of spring joint 62 and separation roller boss 6
The torque of the separation roller shaft 35 is transmitted to the separation roller boss 61 on which the separation roller 59 is attached, by eliminating the W vibration force with the outer peripheral surface of the n-shaped portion 618 of the separation roller shaft 35. Further, when a constant braking torque of 1-C is applied to the separation roller boss 61 via the separation roller 59, the cylindrical portion 61a of the separation roller boss 61 slips at the inner diameter portion of the spring joint 1-62, causing the separation roller boss 61 to slip at the inner diameter of the spring joint 1-62. l The rotation of the UJ-ra 59 is regulated. Note that the JI roller 59 is made of, for example, urethane material with a tIiP degree of 80° in order to obtain a constant braking force due to friction with the original. It is designed to cope with changes in temperature due to adhesion of paper waste, etc.

; Therefore, the take-out roller 56G rotates in the direction of arrow Y5/j shown in FIG.
3.It rotates in the direction of arrow Y3 shown in the figure, but when a plurality of originals are in contact with the nip portion of both rollers 56 and 59 in a stacked state, the topmost original is rotated by the rotation of the take-out roller 5G. The document that is sent forward is returned in the opposite direction by the rotation of the separation roller 59. ) Regarding the frictional force between the vehicle volumes, the limited power transmission mechanism 5
This is because 8 does not slip. As a result, the topmost layer of original documents is reliably taken out. 1 taken out
When the 6th original is conveyed, the frictional force between the 1100 and the separation roller 5') 9 during the conveyance reaches a sufficient braking torque to cause the limited power transmission mechanism 58 to slip. Since the lower surface of the document is rotated by the separation roller 59,
That will happen. Note that during the conveyance of the uppermost layer document, if the document below it tries to get between the take-out roller 56 and the separation roller 59, the brakes 1 to 59 are released and the separation roller 59 is moved to the position Y3 shown in the third figure in the same manner as described above. It rotates in the direction ゛C and returns in the opposite direction J.

J3, the original is placed on the mounting table mentioned above (Figures 1 and 2 (a'
))) A document detecting section 65 is provided to detect whether or not the document is placed on the document 6B. As shown in FIG. 9, this includes an Orad 66 fixed to a frame (not shown),
a detection lever 67 rotatably installed on the Urad 66; a release cam 68 fixed to the driven shaft 30B of the 33rd shaft 30 and capable of engaging with the back surface of the detection lever 67;
1) A detector 69 optically detects the presence or absence of the tip 67A of the detection lever 67;
When a document in a multi-layer state is inserted from the direction Dh shown in FIG. When the document is removed, the tip 67A of the detection lever 67 moves to the detector 6B.
As a result of blocking the screen, it is possible to determine if there is no original.

Next, FIGS. 10(a) and (+1) show a configuration for taking out a document when a document jam occurs in the paper sheet feeding product (separated feeding Hiσ) 202.

The explanation will be made while also referring to (c) and (d). In each figure, parts I that are the same as those shown in Figures 3 and 6 are designated with the same reference numerals (
It's J. What is shown in Figure 10(a) is 0 in Figure 3.
1 is a perspective view of the portion viewed from above, and as shown in FIG. 1, arrows S1. It is exposed by opening the cover 206 which can be opened in the S2 direction. The pair of arms 50.50 are rotatable about the extraction axis 27 in the direction of the central arrow 33.34, and 4-noid holders 300, 300 are arranged opposite each other inside the arms 50.50. has been done. A lock lever 301 that is operated by an attendant in the direction of 85 and S is provided on the small side lever 300, 300, and furthermore, this lock lever 30 is provided with a force member 302. The tortoise cock lever 301 is provided with a hook 301A at its lower part, and an engagement window 103Δ through which the hook 301Δ engages and disengages. The upper guide 103
It is formed on the upper side of. When the hook 301Δ is locked to this engagement window 103Δ, FIG. 10 (C,)
Shown in J: Trim the sea urchin so that it is, for example, 1 mm or less.
J-).

Then, as shown in FIG. 10(d'), when the staff member rotates and lifts the lock lever 301 in the direction of the arrow SSh, the hook 301A is moved from the engagement window 103A to 1llt [IB].
L,, feed roller 11 and lll1! The arm 50.50 is rotated in the direction of arrow S3 together with the output 1 cola 56 to widen the conveying path of the document, making it possible to easily take out the jammed document.

Next, the operation of the separating and feeding device 3 is shown in FIGS.
This will be explained with reference to on.

Figure 7A11 (a) is an explanatory diagram of the state before inputting the original.

First, a plurality of documents P are piled up and put into the stacking chamber 206A at once. The document P inserted into the accumulation chamber 20GA at this time is detected by the detection lever 67 as shown in FIG. 11(b).
Press to set the detector 68 to non-blocking, thereby
“Detect paper J.

Then, the original 1-) put into the collection chamber 206A is
On the mounting table 2) 0613, there is a stopper 10 protruding from the side regulating plate 206C and the lower end of the inclined surface of the mounting table 20G. End J3 J: The tip of the arm is held in a positioned position on standby.

Next, the document feeder 201 +3 stars 1 to 3 (not shown)
When the phase is pushed, the motor 20 is rotated in the third X1 direction shown in the figure, and the solenoid 31W is energized. When the solenoid 31W is excited, Fig. 5(a), (
As explained in d1 in b), the spring clutch device 31 becomes connected, and the rotation of the motor 20 in the x1 direction is transmitted from the first shaft 25 to the driven shaft 3013 via the driving shaft 30A and the spring clutch device 31. and this axis is rotated in the x515 direction shown in the third figure.

This rotation causes the first drive block 1 to
52A, the feed roller 11 rotates in the direction The cam 44 attached (pushed) to the cam 30B rotates, and the stopper 10 moves in the direction of arrow △1 in Fig. 11<C) via the cam lever 43, cam lever shaft 42, etc. Rotate to the lower layer. Then, as shown in Fig. 11(C), the document 1 gradually slides down diagonally from the second layer to the lower part. Among the group of slipped originals, the originals closest to the loading table 20613 (originals located in the lower layer) receive a greater frictional force between the tip of the groove and the urethane rubber seal, and the braking force is greater as the document is in the upper layer. Because of the small size, the leading edge of the document group that has slipped down is reliably shaped like a step and is braked by friction. Therefore, it is possible to prevent the entire group of original documents that have slipped down from sliding forward and the uppermost document coming into contact with the outer circumferential surface of the take-out roller 56 at a position substantially above lj, thereby preventing the document from being heated. It is possible to completely avoid a situation in which the two-layered single-stop document cannot be inserted into any contact portion between the roller 56 and the separation roller 59. When the cam 44 is roughly rotated, the C stopper 10 is rotated in two directions in the direction of the arrow in FIG. 11(d) following the return stroke of the cam curve of the cam 44.
The uppermost document P is pushed onto the feeding roller 11. Pushed by the feed roller 11 1.J() 1: The top layer of the document is pushed by the arrow X6 in Fig. 11 <C>.
The feed roller 11 rotates in the direction J and is bitten into the contact portion between the take-out roller 5G and the separation roller 59.

This operation is performed during one rotation of the driven shaft 30B, and as the driven shaft 3013 is further rotated once, as shown in FIG.
) and FIG. 11 (The same operation as J shown in (1) is performed (FIG. 11 (0), (r)). As a result, the top layer I
The Ai document inevitably gets stuck between the take-out 1''-ra 56 and the separation 10-ra 59 before the original located below it.

Then, when this biting operation is completed, the motor 20 is reversed and rotates in the direction of the third arrow Y1 in the figure. Then, as shown in Fig. 3, J1 '11It+ 25,
The take-out roller 56 is connected to the 11th
It rotates at a low speed of about 11001I1/SeC in the direction of arrow Y:
The separation feed shaft 335 rotates in the 'j direction, and by the action of the limiting power transmission mechanism 1-8, the separation roller 59 is rotated in the opposite direction by λ·1 in the document feeding direction. do. At this time, according to FIG. At the moment when the take-out roller 56 is not biting the contact portion, the frictional rotational force transmitted by the take-out roller 56 to the separation roller 59 exceeds the reverse frictional rotational force of the separation roller 59 transmitted via the J spring joint 62, as shown in FIG. 9(a). Then, the take-out roller 56 rotates in the forward direction as a driving roller, and the separation roller 59 rotates in the forward direction as a driven roller. Continuing this operation, the outer periphery C3L of the take-out roller 56 made of natural rubber material with a large coefficient of friction m takes out the document P1 or Px between the take-out roller 56 and the separation roller as shown in FIG. 59's contact area.Due to the difference in frictional resistance, the minute-10-ra 59 rotates in the direction to remove the original when one sheet is taken out, and in the direction to return the original when two or more sheets are taken out. Then, as shown in FIG. 11 (IJ), the two pairs of rollers work together to ensure that one sheet is taken out. 15
J' between D and upper swordite 103; Then, as shown in FIG. 11(j), the leading edge of the document P bites into the contact portion of the registration rollers 13A and 13B, and the document P is pushed into the take-out U-roller 56 and the registration roller 11.
A and 1313, the document is waved and the leading edge deviation is corrected.The motor 20 stops at -Ul.

Here, regarding the feeding and separating actions of the document between the take-out roller 56 and the separating roller 59, we will explain the document feeding action and separating action between the take-out roller 56 and the separating roller 59.
This will be explained in further detail with reference to 1). When the stopper 10 drops and falls, the document on the suction section on the loading guide 206B bites into the contact area between the take-out roller 56 and the separation roller 59.

However, if originals of different paper quality are mixed and placed, or if the originals are separated in an ideal step-like manner, there is no guarantee that the originals located below the top original will be placed between the take-out roller 56 and the separation roller 59. It is extremely rare for a chip to bite into the contact part of the machine (this can happen). The above-mentioned <■, 10 1-minute delay - C! Take-out roller 56 subjected to IJI
And due to the action of 1'fl[L+-LA5)9, a forced separation t'i occurs. In reality, at the moment two or more originals are caught in the contact portion of the two eye-rollers 56 and 59 in any form, the frictional conveying force transmitted by the take-out roller 56 to the uppermost original P Above manuscript 1〕×1
PX2 and PX are conveyed by the conveying force of
2 (or I)
It is transmitted to the upper surface of the original m p +< which is in contact with the C separation roller 9. However, on the other hand, as shown in FIG. 9(a), the separation roller 5 is constantly receiving a reverse rotational load with respect to the pick-up and conveyance direction, which is transmitted through the Lee spring joint 1-62.
This can be achieved by setting the frictional conveying force transmitted by the separation roller 59 to the document P l' to be larger than the frictional conveying force between the originals received from the document P9. Therefore, the document 1)R is returned toward the mounting table 6Blj by the action of the separation roller 59, while the documents PXI, PX2 (PX3) above it are moved jμ in the take-out direction by the action of the take-out IJ-roller 59. Here, the circumferential speed V RIJ of the separation roller 59 is set to approximately three times the circumferential speed V RIJ of the separation roller 59, and the document 1 in contact with the take-out roller is If it advances 10mm from the multi-feed state, V or constant J-, it is 1lIt roller 5 (original F in contact with 3) R
It will be mIA for about 30m. But minute 1!
If the distance (not shown) from the contact point between the take-out roller 56 and the separation roller 59 to the leading edge of the original document 1 is 30 mm or less (
The return of X is to I (draft 1).
×2 (or PX3) is returned to m and that is transmitted and instantaneously J
You will be given 3 points back. Repeat this to perform the minute Fi1 action,
Retrieval 1]-Document 1 in contact with the roller 56 comes in contact with the lower surface of X1. Kai Do 1st - La b9 is drawn in 1) ×
I'm trying to put back the manuscript from 1, but it takes a while.
J-La 59 and min tl! As shown in Fig. 9(a), a spring joint 62 is inserted between the I1 roller shaft 35 and the rf
From the top 11 of the original 1) X1, I! i! Receives friction conveying force,
On the other hand, from the bottom of the original 1〕×10 spring join 1-
62 and receives the force of the separation roller 59, but the take-out U-ra 56 is
The frictional conveying force transmitted to the upper surface of P . Here, manuscript 1〕×
Since the frictional rotational force transmitted by the lower surface of the document PX1 to the separation roller 56 is greater than the frictional rotational force transmitted from the spring joint 62 to the separation roller 59, the lower surface of the document PX1 cooperates with the take-out roller 56 without being exposed to the separation roller 59. Then, the uppermost document PX1 () is surely separated from the roller contact portion and taken out and conveyed. Next, FIG. 11(1) shows the document separation ability of the take-out roller 56 and separation roller 59.
The explanation will be based on. From the contact 7!1t between the take-out roller 5G and the separation U-ra 59, which is in a state immediately before the start of separation, a pair of resist rollers 13A, 13 are located in front of the conveyance direction.
Determine the distance to the contact area of B and take it out. Distance 11.I2.j!3...lR1 take out 1-1-ra5
6 peripheral speed is VF, separation roller! If the circumferential speed of 'i9 is VR and we temporarily set 3VF = VR, then 3(L-
Zt) > Scarcity 2 + 13.1 ... Scarcity] (; Separation action is performed within one range of coins.

Then, the original that has been completely separated by N1 is moved to the registration roller 13 as explained based on FIG. 11(j).
△, 1313 and is waved, and the motor 2
0 will be temporarily stopped. Then, after a predetermined period of time has elapsed, the motor 2o is rotated in the direction of the third arrow x1, and as a result, the mm1 axis 25. Second one-way clutch 26 [3, third timing bell 1-22C1
Second shaft 28, fourth and fifth drive gears 2/ID, 2
/III first and second registration roller shafts 29A, 2
A pair of registration rollers 1.1:3A through 98 etc.
13 [3 is rotated, and the manuscript shows Figure 11 (m) 1J
: The sea urchin C image is conveyed to the aforementioned conveyance device 3 at a predetermined timing such as press release.

When a document jam occurs in the 1'N position 202 and the conveyance device 203, the jam is detected by a detection means (not shown) and the period of the eighth Clara: It takes more than 19J for one revolution of the r-i neck 31. (The motor 20 continues to rotate and the solenoid 31W is demagnetized.Then the release protrusion 311) is the function of the intermittent lever 31S! 111 end pull 31S is latched to
As a result, the stopper 10 comes into contact with the outer periphery of the feed roller 11 and is stopped with one stroke.

In this way, all the suppressing parts are in the star 1-ii1 functional state (
It is returned to the initial position.

Here, the take-out roller 5G and separation roller 59 of the separation feeding device
We will explain what to do if a document jam occurs between the two pages. If you look at the cover 206E of the accumulation chamber 206A, you can directly see the minute M feeding section 12 in a small state as shown in FIG. 10(a). The staff member moves the lock lever 301 in Fig. 10 (1).
), the lock lever 30 is rotated in the direction of arrow 85.
1 hook 301A is the engagement window 1 of the upper guide 103
03A, the arm 50 is rotated in the direction of arrow S3 along with the feed roller 11 and the take-out roller 6), and the conveyance path for one document is expanded. The 10th thing I wanted to do
As shown in Figure (d), the feed roller 1 is disconnected from the stopper 10 or the top layer original, and the ejection roller 1 is separated from the stopper 10 or the top layer document 11] - the top layer document is removed Since the contact with the document is cut off, the jammed document can be easily removed from the loading table 2.
It is possible to withdraw to h of 06B. At this time, there is one or more sheets of manuscript 1] on the mounting table 20613, but the contact between the two sheets 56 and 59 is cut off, and the J5
However, the document cannot be separated and fed.

It should be noted that the hook 301A and the engagement '18103A are in a locked state, so that the document cannot be separated and fed. -j: When one document is taken out, if the original (4) exceeds the stopper 10 and falls by the own vehicle, the horn will be removed by the force at that time L1-L1]O! ! ! However, as explained based on FIG. 10(C), the maximum separation movement path 1111@- of the take-out roller 56 with respect to the roller 59 is 1 mm or less. Since the knock 30'I A and the engagement K 103A are configured in the same way, take out the top layer document [1-R 56 and 11].
1. It can be reliably guided to the u-ra b9 and nip part,
Moreover, the uppermost layer of originals can be smoothly fed without causing the separation roller 59 to reversely return more than necessary.

Next, the conveying device 203 will be explained in detail. In FIG. 3, 203 F schematically shows the drive system of the conveying device, and FIG. 12 is a schematic side cross-section of the conveying device, etc. This 119. The feeding device is a pair of bells 1~
Rollers 70A, 7013 and both bells 1~[''-Rough 0A
, the original on the glass 204 is
An endless conveyor belt 71 that slides and conveys by frictional force, and an endless conveyor belt 71 that is arranged on the inner diameter side of the conveyor belt 71 and faces the original platen glass 20/l.
a plurality of pressing means 109 for applying pressure to the bells 1 to 1;
Power intermittent device 7 for intermittent power method) 1
2, and a 4J1 output roller 733 driven by the power from the bell 1 to the roller 70B. In the vicinity of the tip of the original platen glass 204, which has been cured in the conveying direction of the original, as described above, a document that is fed 1ffJ onto the original platen glass 204 and is scolded by -C, for example, is placed against the conveying force of the conveying device 203. A first document stopping means 104 that stops at the exposure position is arranged so as to intersect with the document feeding direction in an adjustable position.

This conveyance device 203 is connected to the motor 20 by the 33rd illustrated arrow
Due to the rotation in one direction, the conveyor belts 1 to 71, which rotate in the direction of the arrow "C" The document table glass 204 is shown in Figure 12.
It') IIrt feed and stop the original at the 15th point 1 means 1° 4 and stop at the exposure position, and copying of the document by the applicator main body 201Δ as shown in FIG. 1 is completed. After that, the original is transported and discharged to the original tray 205.

Details of the pressing means 109 will now be explained. For example, the pressing force means 109 is, for example, the conveyor bells 1 to 71
A pressure roller 109A is rotatably arranged on the inner diameter side of the
The lift (not shown) of each pressure [J-RA 109Δ is biased by a biasing member (not shown) such as a leaf spring (not shown) and the document platen glass 20
Pressure is applied to 71 toward the surface of 4 ([C conveyor bell]).

By providing this pusher 1'1u109,
It becomes possible to smoothly slide and convey the original on the original platen glass 204. In particular, even after the document contacts the document stopping means 104, the conveying force is applied to the document by the conveying bells 1 to 71, and the entire leading edge of the document is transferred to the document stopping means 104.
Since the pusher is aligned so that it comes into contact with the pusher 04, the pressure roller 109Δ located at the far side (the front in the conveying direction) where waves are likely to occur when aligning the presser is 109Δ. The force section (A) (not shown) is selected so that a larger pressure force is applied than the other pressure rollers. Therefore, the tension is particularly increased in the portion of the first general feed bell 1-71 near the document 4 stopping means 104, which prevents the document from waving, and allows image information without distortion during exposure in the copying machine main body 201A. It becomes possible to obtain 1+1r IJ from the manuscript. In addition, in order to have four pressurizing parts for the conveyor bells 1 to 71 at predetermined intervals in a direction crossing the document feeding direction, a pressure roller 109A and a special part (not shown) are used. The suppressing means 10 is arranged in
9, the appropriate continuous Ua transmission speed for the original can be set to 1.
If the frictional conveyance force that would otherwise occur in one machine can be reduced to 117, the strong conveyance force would be applied to the original in a way that would easily cause the document to bulge. “Affordable and highly reliable”! What happens is e-saru.

Also, at predetermined intervals along the feeding direction of Ijit IQ, the four rows of pressurized parts are moved to the right J-
The pressure roller 109A and a biasing member (not shown) are specially arranged to form the suppressing means into an IM structure (if J24, the straight conveyance property of be able to.

Next, details of the power interrupter @72 will be explained with reference to FIG. 13.

This power interruption 'JA recommendation 72 is shown in FIG. Indication: The rotation transmission of the second shaft 28 (which is an example of a drive unit 81 in which the drive system from the motor 20 to the second shaft 28 is fixedly arranged with respect to the transport surface of the paper 1i) is cut off, When the transport device @ 203 is rotated in the direction of the first arrow E in the figure, the document table glass 204 is in contact with the transport bells 1 to 71 (as shown in FIG. 33, the rotation of the second shaft 28 can be transmitted) l
It has come to be in a layered state. Nakawara, 133rd
As shown in the figure, a power intermittent drive 1'7' (also referred to as a sixth drive gear) 241- is mounted integrally and rotatably in the middle part of the second shaft 28. The holder arm 75 is rotatably attached to the two shafts 28, and the holder arm 75 is rotated in the direction of the arrow shown in the 13th figure. i
j ~ Engages with the router arm 75 and locks it in a predetermined position (
the holder arm 7 and the holder arm 7;
5, and the sixth driver (7"
Gear 24]: The power that meshes with the intermediate gear (hereinafter simply referred to as idle gear) 78, and the outside diameter of this idle gear 78 is equal to (J), and its center of rotation is The idle gear 78 can be moved into and out of contact with the first pitch leakage j' isk 107 whose rotation center axis is the same as the axis and is attached to the roller lj+lI70Δ' of the roller 70A. The sixth drive gear 2/l is connected to the idle gear 78 by 1'[
The direction of the line 171 of the applied force is between the center of rotation and the sixth
A driven gear for power intermittent = tya (hereinafter also simply referred to as the seventh drive gear) 24 G and this The first pitch circle disk 107 has an outer diameter approximately equal to the bit circle diameter of the driven gear for intermittent moving power, and has a rotation center that is the same as its rotation center axis.
A second pit leak disk 10 that can be in rolling contact with
It is composed of 8 and J:.

However, when the conveyor belt 71 is in contact with the original platen glass 2.4 (state !1 shown in Figures 1 and 3), the second
The rotation of ffl+ 28 is transmitted to the sixth drive gear 24F, and the idle gear 78 is rotated in the direction of the arrow in the figure. However, the position and rotational direction of the idle gear 78 relative to the seventh drive gear 24G are set in such a direction that the rotation of the idle gear 78 bites into the seventh drive gear 24G and reduces the force as described above. has been done. Therefore, since the conveyance device 203 can be separated from the document glass 204, when the conveyance device 203 is closed and the conveyance bells 1 to 71 are about to come into contact with the document glass 204, the Idol 1! 778's Yamabe and 7th Drive Gear 2'l G's Yamabe meet C Part 11. 'I point C may be unable to transmit power, but the seventh drive gear 24G and idle gear 78
instantaneously engages at the peaks and valleys, and the C drive system is completely connected. When the idler 21 nearer 78 and the seventh drive gear 2/IG are engaged, the first pitch circle disk 107 and the second pitch circle disk 108 come into contact at their outer peripheries so as to be able to roll and come into contact with each other. Zuru. Therefore, the distance between the centers of the C idle gear 78 and the seventh dry nozzle 1, 2', and 2' is regulated by both discs 107 and 108, and both gears are in rolling contact with the pitch reakle to achieve ideal meshing rotation. By preventing noise and vibration during power transmission, it is also possible to prevent wear on both gears. In addition, especially when such a configuration is applied to a gear with low precision, it is possible to prevent noise and vibration caused by the low precision of the gear. Then, the rotation of the seventh drive gear 24G is transmitted to the roller 70A, and the document is moved between the lower surface of the conveyor bells 1 to 71 and the upper surface of the first stacking table glass 204 through the pressure from the pressing means 109. It will be transported by friction. If the original is jammed between the original platen glass 204 and the conveyor bell 1-71, or if the original is directly transferred to the original platen glass 20/I using the feeder 202, !, as shown in Fig. 1, turn the sea urchin transport device 203 in the direction of arrow 1/'J. When the iJ luda arm 75 is urged to rotate in the direction of the 131st arrow 1 through the A4 force member 76 and rotated by a predetermined amount, 1.', j'l
:" Its rotation is regulated by the stopper 77. In this state, even if the motor 20 is driven, the conveyor belt 1-71 does not rotate, so the work (cleaning of the IIR conveyor belt 71) 111 work, removal of one-finger document jam], manual setting work of the original) is ensured.

Next, details of the document stopping means 104 will be explained.

14(a), (1), and (c) are side views, schematic perspective views, and perspective views showing essential parts of the original fg stopping means; FIG. In the figure, Jj shows 104ΔC,
A positioning portion 104a that locks and positions the leading edge of the document by protruding and retracting from the surface of the document table glass 204, and when this positioning portion 104a appears on the surface of the document table glass 204, the back surface of the document table glass 204 This document positioning member includes a protrusion 104b that protrudes from the positioning portion 1071a so as to come into contact with the document, and a flat portion 104C that extends in the opposite direction to the protrusion 104b and guides the document. Note that this document positioning member 104
The position where the positioning portion 104a protrudes from the surface of the document table glass 2040 is the exposure position Q1. On the upper surface of the flat part 104C of the document positioning member 104A, it is possible to easily and accurately place three-dimensional objects or thick objects that are not suitable for automatic document feeding into a predetermined exposure position. The display angle 104B of the sheet-like sheet with a size scale showing various original sizes is shown as 104B. As shown in (a) J, the size display sticker 10/I1 is placed in Uni Ichikawa section 104C.
3 is attached, the upper edge 10/Ia of the positioning portion 104a protrudes beyond the upper surface of the LEIS display sticker 104.8.
is configured. Therefore, when the original is moved 111 sheets further from the exposure position Q1, the leading edge of the original comes into contact with the leading edge of the size display sticker 104 [3], thereby preventing the size display sticker 10413 from being blown away. be able to. And this document positioning member 1
The flat part 104 to 04 has an IJ at the lower end located on the c side.
A driving shaft (104C) bent into an L-shape is fixed with both ends protruding. Then, as shown in FIG.
04Ca is loosely attached to the first stop holder 104D, and the second protrusion 104.04 of the driving shirts 1 to 104C. Cb
is loosely fitted into the second stop holder 104E, and the document positioning member 104A is loosely fitted into the second stop holder 104E.
[It can be rotated freely against []. In this state, the tenth stop bolt 104D is movable in the document conveyance direction, for example, in the elongated hole 104. The document positioning member 104A is attached to the upper surface of the copying machine main body 201A with a screw (J) via Da, and the second stop holder 104 is rotatably attached with a screw.
The second stop holder 104 can be rotated in the directions of the arrows a1 and α2 shown in FIG. 14(C) about the second stop holder 104, thereby making it possible to adjust the exposure position. Na J3
, both the stop holders 104-D and 104E are,
The tip also has a function of positioning the document table glass 204 by pressing the end surface of the document table glass 204 and the upper surface near the groove. Further, as shown in FIG. 14(b), the L-shaped bent portion 10/
A tension coil spring 104F is attached to the middle part of 4CC. [The plunger 104'G- of a plunger type solenoid 104G is connected to the bent end, and the drive shaft 10
It is configured to be rotatable about 4G in the directions of arrows β1 and β2 shown in FIG. 14(b).

Further, as shown in FIGS. 15(a) and 15(b), an exposure lamp 201Δ built in the copying machine main body 201Δ is located on the rear surface of the document positioning member 104A (where the document does not travel), especially on the protrusion 104a side. A white painted portion 10411 is formed to reflect the light from '. Therefore, on the photoreceptor drum (not shown) built in the copy 1 IKI IA 201Δ, the outside of the image area of the original document is not formed, and wasteful consumption of developer can be prevented.

Next, the operation of the document stopping means 104 will be explained.

First, when the branch type solenoid 104G is de-energized, the positioning part IJ104 is biased by the tension coil spring 104F, and as shown in FIG. 204, and the document can be positioned by abutting against this positioning portion 104a.

Therefore, when the document is conveyed by the conveyor belt 71, the leading edge of the document comes into contact with the positioning section 104a, and the document is actually stopped at the exposure position Qt. If the operator directly places the document on the surface of the document table glass 20/1 by placing the original document away from the surface of the document table glass 204, the leading edge of the document is brought into contact with the positioning part 104a and the document is moved in the width direction of the document. The size display sticker 104.[3] is used as a reference for positioning and placing the document at the exposure position Q1. Therefore, the document can be placed accurately and easily both when placing the document in a time-consuming manner and when using the document feeder. It can be placed at the exposure position Q1.Moreover, when the positioning part 104a is projected as shown in FIG.
is in contact with the back surface of the document platen glass 204, so the document positioning member 104 is maintained in an extremely stable protruding state. It is possible to reliably prevent the position of J3 from shifting when it is placed. Furthermore, this protrusion 104b creates a gap between the IJTI platen glass 204 and the positioning part 104a near the back surface of the document platen glass 204, so foreign objects such as clips can fall into the copying machine main body 201A from this gap. You can prevent this from happening.

Note that when the document is automatically fed by the document feeder 201B, after the exposure for the first image at the exposure position Q1 is completed, the plancito type sonoid 1041E3 is energized to move the 'cljt document 11'/positioning member 1048 to the 12th position. The positioning part 104 rotates in the direction β1 shown in the figure.
It is assumed that a is lowered from the surface -F of the document platen glass 204 and the document is ejected. This point 1) Positioning n! The upper edge 104a' of i 104a protrudes beyond the upper surface of the size display sticker 104B.
: The original to be printed on JJI paper does not come into contact with the tip of the size display sticker 104B, and this size display sticker is prevented from peeling off.

It should be noted that the above embodiment is just an example, and it goes without saying that each member can be replaced with another part 44 having the same function.

[Effects of the Invention] As is clear from the above description, the image forming apparatus of the present invention has excellent effects such as being able to accurately and easily place a document when manually placing the document. It is something that you have.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of one embodiment of the present invention in which a position A is applied to a copying machine equipped with a 15I whiteboard feeder.
Figures (a)' and (b) are schematic side views and partial schematic perspective views showing the internal mechanism of the paper sheet separation and feeding device. 4 (a) and 4 (m) show a part of the drive system; Figure 5 (a), (b)
), (c) are an exploded perspective view of the spring clutch device, its assembled cross-sectional view, an exploded perspective view of the clutch disconnection part, FIG. 6 is a detailed perspective view of the J section shown in Figure 3, and FIG. 8(a) and (b) are an exploded perspective view of the limited power transmission mechanism; FIG. 9 is a schematic perspective view of the document detection unit; FIGS. 10(a) and (b). ), (c
). (d> is a perspective view without showing the structure for handling document jams, a side sectional view showing the opened state, a partial side sectional view showing the opened state, a side sectional view showing the expanded state, and Figs. 11(a) to (I) ) is an explanatory diagram of the operation of the separating and feeding device, FIG. 12 is a sectional side view of the conveying device, etc., FIG. 13 is a schematic perspective view of the power interrupting device, and FIG.
Figure<a), (L+). (C) is a side view showing the main parts of the document stopping means, *schematic perspective view, and a perspective view showing the attached state; FIG. 15(a). (b) is a top view showing the painted part of the document positioning member. It is a rear perspective view. 104... Original positioning member, 104a...
...Positioning part, 104a-...Top edge 10413
...Document size display (size display sticker), 201A...Image forming apparatus body, 202...
. . . Original supply section, 203 . . . Original transport section. Figure 2 (0) Figure 2 (b) 1 Figure 4 (b) 0B 43 Figure 8 5 ) 9 Figure 10 (G) Figure 10 (b) (C) ＼ 9 Figure 10 (d) 'D9 ((1) 59 9 Fig. 14 (b) 04ca Fig. 14 (C) Fig. 15 (b)

Claims (3)

[Claims] (1) The image forming apparatus main body that forms an image based on the exposed image of the original in ``Original Placement Member''-1;
A document conveying section that conveys the document on the surface of Δ, and a document conveying section that can protrude and retract from the surface of the document placement section 4A in order to bring the document conveyed by this document conveying section into contact with each other and stop it at a predetermined position. An image forming apparatus characterized by comprising a document positioning member and a document rise display provided on the surface of the document 131ζ positioning member. (2) The image forming apparatus according to claim 1, wherein the document size display is a size display sticker on which the document size is written and affixed to the document positioning member. (3) The document positioning member has a document abutting positioning portion that protrudes beyond the upper surface of the attached size display sticker and has an upper edge against which the document comes into contact. The image forming apparatus described in .