JPH01176739A - Original transport apparatus - Google Patents

Abstract

PURPOSE:To provide a document transport apparatus having a document reversing mechanism which is small-sized, light and excellent in operability by providing a reversing portion on the upper portion of a transport portion. CONSTITUTION:A frame 11 holding a paper feed unit 10 is fixed to a copying apparatus main body 1 by a vis and covered with a cover member 12. A transport unit (transport portion) 20 having a transport belt 21 which can be rotated in the normal direction and in the reverse direction on the upper surface of a document table glass 2 and a discharged paper reversing unit (reversing portion) 40 are stored and held in a housing 22, and the housing 22 is supported at the frame 11 by a hinge to be opened counter-clockwise by a handle 22A. The drawing shows the condition where the transport unit 20 and the discharged paper reversing unit 40 are pushed down to the right and the document transport belt 21 presses the document table glass 2 disposed on the upper portion of the copying apparatus main body 1. As the discharged paper reversing unit 40 and a discharged paper tray (discharged paper portion) 80 are installed on the upper portion of the transport unit 20 above the document table glass 2, especially private installation plane area is not needed to be formed in a small size and excellent in operability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document feeder used in a copying apparatus, and more particularly to an automatic document feeder having a mechanism for reversing a double-sided document.

[Conventional technology]

An automated document feeder (hereinafter referred to as DF) has already been provided as a device that can efficiently supply originals to be copied to a copying machine even in an unattended state. t9 for those that copy only one side of
It was limited to 1g.

On the other hand, with the recent development of recording devices that can make continuous copies on both sides of recording paper, the need for an automatic reversing document feeder (hereinafter referred to as RADF) that can copy double-sided originals is increasing. Many proposals have been made as fi 6m for reversing the front and back of a document. Regarding them, see Japanese Patent Application Laid-Open No. 59-216159, Special 1m
Publication No. 112738/1982, Publication of Utility Model Application No. 4548/1983, Publication of Japanese Patent Application Publication No. 8834/1983, Japanese Patent Application Publication No. 62/62/1988
There are proposals such as JP-A No. 72 and JP-A-61-269169.

In the case of this type of RADF, the original is placed on the paper feed tray.
Only one sheet of the original is sent out from the paper feeding section, and the document table is pressed and fed on the lath by the forward running of the conveying belt of the fine feeding section, and is stopped at a predetermined position. Here, the first side (front side) of the document is scanned and exposed to form a copy image on the recording paper.

The document that has undergone the copying process on the first side is moved over the document table glass by the forward running of the conveyor belt, and is sent to the reversing section.

When the second side (back side) of the original is to be subsequently copied, the original is reversed inside the reversing section, and the original is fed from the leading edge onto the original glass surface again. Next, the conveyor belt is switched to run in the opposite direction by the reverse rotation of the reversible motor and the drive roller, and the document is conveyed in the opposite direction on the document table glass surface. When the leading edge of the document comes into contact with the stepped portion of the stopper plate provided at the edge of the document table glass, the conveyance of the document is stopped.

After reaching this document stop position, the second side of the document is scanned and exposed to form a copy image on the recording paper.

Thereafter, the conveyor belt is switched to the forward direction, and the document is conveyed in the forward direction on the document table glass surface, passes through the paper ejection path of the reversing section, is ejected through the ejection opening, and is discharged onto the paper ejection tray of the paper ejection section. sent to.

[Problem that the invention seeks to solve]

However, in the RADF according to each of the above-mentioned proposals, when the original is turned over after the front side has been exposed and the back side is exposed again, the transport mechanism is complicated because it passes through multiple paper paths. The conveyor belt must be driven frequently by switching between forward and reverse directions, and it is also necessary to provide many paper feed/discharge switching members for each paper passing path, making the device large and large.
It had to be complicated and therefore expensive.

In particular, since the total length of the document reversing conveyance path of the reversing section must be set to be sufficiently longer than the maximum length of various documents to be conveyed, the volume occupied by the reversing section must be large.

In conventional document conveying devices, the conveying section was provided above the document table glass, and the reversing section was provided in series on the extension of one end of the conveying section, which resulted in a long document conveying device and required a large amount of installation space. .

In addition, when it becomes necessary to open the document table glass surface of a copying machine equipped with such a document transport path, conventional large document transport devices in which the transport section and the reversing section are arranged in series require extensive manual operations. In addition, there were problems such as poor workability in removing jammed originals, pressing book-like originals, and special originals.

[Means for solving problems]

This invention solves and improves these problems, and is a small, lightweight document reversing device with a reduced footprint and excellent operability.
! A well-structured document transport system! 1 (RADF).

The above purpose is to provide a paper feeding section, a conveying section, a reversing section, and a paper ejecting section above the document glass, feed a single document from the paper feeding section onto the document glass, The document is conveyed by a belt, and after the first side of the document is exposed by a reversing section having a reversing path, the document is reversed to expose the second side of the fjS, and then the document is discharged to a paper discharge section having a document discharge tray. Original transport I! CR! The present invention is achieved by the document conveyance device according to No. 1, characterized in that a reversing section is provided above the conveyance section.

Furthermore, the above object is achieved by the document conveying device of the present invention, characterized in that a reversing section and a paper ejecting section are provided above the conveying section.

〔Example〕

Next, the present invention will be described based on embodiments shown in the accompanying drawings. FIG. 1 is an external perspective view of a copying machine equipped with a document conveying device@1. In the figure, 1 is the main body of the copying machine, and 5 is the original 1n 1m feeding device. In the document conveying device 5, a document table on the main body 1 of the copying apparatus is installed on the lath 2.

FIG. 2 is a sectional view of the document transport device 5 showing the document transport path. FIG. 3 shows the document transport device f? It is a perspective view showing the drive system of f5.

The document transport unit r115 includes a transport unit (20) having a transport belt 21 that can be rotated forward and backward on the upper surface of the document table glass 2, and a paper feeding unit (paper feeding section) 10 on one side end of the document table glass 2. , the document table includes a paper discharge reversing unit (reversing section) 40 above the other end side of the document table lath 2, and a discharge tray section (sheet discharging section) 8o above the transport unit F20. A frame 11 holding the paper feed unit 10 is screwed to the copying apparatus main body 1 and covered with a cover member 12. Conveying unit 20 Upstream discharge reversing unit 40
is housed and held in a housing 22, and the housing 22 is connected to the frame 11 and the butterfly.

It has a structure that allows it to be opened counterclockwise by holding the handle 22A on the right side of the figure. The belt 21 is in a state in which the original table lath 2 disposed at the upper part of the main body 1 of the copying apparatus is pressed.

The document feeder fi5 according to the present invention enables automatic document feeding using the feeder fi mechanism described below, but can also be used as a normal platen cover by manually opening and closing the entire document feeder i5. It also has the following functions.

The paper feeding unit 10 has a document receiving section which separates the original document on the table 13 from the upper layer one by one and sends it out one by one, and supplies the document sent out from the first document feeding section to the conveyor belt 21. and a second paper feeding section.

First, a stack of originals to be copied is stacked on the original tray 13 with the first page, first side (front side) facing down.

Next, when the copy button is pressed, the relay for driving the motor in the document transport 1 and document storage is turned on, and the reversible motor M shown in FIG. 3 starts normal rotation. As a result of this motor drive, the mackerel evaluation belt 15, paper feed roller 17, and upward conveyance belt 21 all start rotating in the forward direction (counterclockwise direction). At the same time, a paper feed solenoid (not shown) is activated, and the movable guide plate 14 of the first paper feed section jumps up to press the document stacked thereon against the sorting belt 15. The sorting belt 15 begins to rotate in the direction of the arrow, and as a result, the document tray is squeezed by the rotating sorting belt 15 and the sorting roller 16, and only the topmost sheet of the stacked document bundle is sent out. It will be done. When the leading edge of the document reaches the vicinity of the paper feed roller 17 of the second paper feed unit rotating in the direction of the arrow, the paper feed solenoid is turned OFF by a detection signal from the sensor 18, and the movable guide plate 14 is lowered, allowing the following At the same time, the original document feeding is stopped, and only the previous original document is transported by the paper feed a-ra 1.

The document conveyed by the paper feed roller 17 passes above the stopper plate (scale plate) 3 that positions the rear end of the document, and the document is fixed above the copying machine main body 1. The conveyor belt 2 reaches the pressure contact position between the base glass 2 and the conveyor belt 21 of the conveyor unit 20 and rotates further.
Conveyance continues due to the frictional force of 1.

When the rear end of the original MD passes the sensor 18,
The size of the document jam is automatically detected, and a sensor 18 detects when a document jam occurs in the conveyance path.

The conveyor belt 21 includes a driving roller 23, a driven roller 24, and intermediate rollers 25A and 25B, which are rotatably supported by bearing plates fixed to both side walls of the housing 22.
The reversible motor M allows forward and reverse rotation. The upper running surface of the conveyor belt 21 is pressed by tension rollers 26A, 26B which are adjustable and supported by the bearing plate, and the lower running surface is pressed by a pressure roller 27A which is supported by a bearing member attached to the bearing plate.
, 27B, a belt press roller 28, and a separation roller 38.

FIGS. 4(A) and 4(B) are cross-sectional views showing the main parts near the drive roller 23 of the document conveying device 5, and FIG.
) shows a state in which the movement of the belt presser roller 28 is restricted, and FIG. 4(B) shows a state in which the restriction on the belt presser roller 28 is released and the belt is allowed to move freely.

Among the rollers, a bearing member 29 that supports both shaft ends of a belt presser roller (swingback roller) 28 located near the drive roller 23 is arranged so that the roller 28
R11 (Fig. 4(B)) located almost directly above the stepped portion 3a of the stopper plate (scale plate) 3 fixed to the i portion of the paper feed side of the
and a position to the right of that position, that is, in front of the paper feeding direction (Fig. 4 (
A)) It is configured to be able to move almost horizontally in conjunction with the running of the conveyor belt 21.

The bearing member 29 has a groove portion 29a having a cutout oval shape,
The shaft end 28a of the belt presser roller 28 is fitted into the groove 29a and is movable in the longitudinal direction of the groove 29a.

A belt presser roller 2 is provided at the lower end of the groove 29a.
A shaft support protrudes that rotatably supports the shaft end 28m of No. 8 and prevents it from falling downward. On the other hand, the groove portion 29a
The other lower end is cut out to form an opening. When the shaft end 28a of the belt press roller 28 fitted into the groove 29a is moved near the opening, it can descend downward from the opening.

Next, near the shaft end 28a of the belt presser roller 28, a tip 30a of a swing arm 30 can be fitted into and removed from the shaft end 28a.

The other end of the swing arm 30 is a swing shaft 31 having a prismatic shape.
is fixed with screws near both ends. Both shaft ends 31a of this swing shaft 31 are fitted into holes of a hinge member and are rotatably supported.

A link plate 33 is fixed near the center of the swing shaft 31. An elongated portion 33a is provided at the other end of the link plate 33, and a shaft portion 34a at one end of an L-shaped swinging lever 34 is slidably fitted into the elongated hole 33m.

The rotation center shaft portion 34b of the swing lever 34 has an integral shape protruding from both sides, and is fitted into through holes in both side plates of a box-shaped holding plate 36 that fixedly holds the electromagnetic solenoid 35, and is rotatably held. has been done. A torsion spring 37 is wound around this rotation center shaft portion 34b, one end of the spring 37 is hooked to the swing lever 34 and the holding plate 36, and the a-movement bar 34 is rotated in the - direction. energized.

An elongated hole 34c is provided at the upper end of the swing lever 34, and a fixing pin 35B implanted at the tip of the planter 35A of the electromagnetic solenoid 35 is slidably fitted into the elongated hole 34a. .

Next, the operation of the belt presser roller 28 will be explained.

A sheet of document sent out from the sheet feeding unit) 10 passes through the entrance formed by the gap between the conveyor belt 21 of the conveyor unit 20 and the stopper plate 3a, and then the document table is further connected to the lath 2 and the conveyor belt. 21, and conveyance is continued by the rotational frictional force of the conveyor belt 21.

In this document feeding and conveying process, when the conveyor belt 21 rotates counterclockwise (normally rotates), the belt presser roller 28 has a shaft end 28 a that is 30 m above the tip of the swing arm 30 .
However, as the conveyor belt 21 runs, it slides into contact with the conveyor belt 21 and moves to the right, and the stopper plate 3 moves away from the stepped portion 3a. That is, the shaft end 28a of the belt presser roller 28 rotates counterclockwise (while rolling rightward along the groove 29m of the bearing member 29, contacts the right end surface of the groove 29a, and moves rightward. Although it stops, driven rotation is still occurring.

In this state, the shaft end 28 of the belt presser roller 28
a is fitted into and supported by the shaft support 29b of the bearing member 29,
It contacts the conveyor bell (21) and rotates as a result, without descending downward.

Subsequently, the document being conveyed by the conveyor belt 21 while sliding to the right on the document table glass 2 passes the rear edge detection sensor 18 , and then the rear edge of the document passes the stopper plate 3 . After passing through, the sheet is further moved rightward on the document table glass 2 by the normal rotation of the conveyor belt 21, and is fed into the sheet discharge reversing unit 40.

MS5 (A) is a cross-sectional view showing a main part of the document transporting device 5 near the paper discharge reversing unit 40, and shows a state in which a document is reversely transported.

The paper discharge reversing unit 40 is provided with an original ff1D discharge path and a document reversing conveyance path for reversing the front and back sides of the document sheet for double-sided copying.

Then, the paper discharge reversing unit 40 includes a separation guide plate 49, U
A delivery passage 41 consisting of a turn guide plate 56, a reversal insertion passage 42, a reversal passage 43, 44, and a paper ejection roller 46.
It is composed of a B1 lower roller pair 47, a document conveyance switching member 50, a paper leading edge detection sensor (discharge sensor) 48A, a trailing edge detection sensor (reversed paper sensor) 48B, an exterior member 70, and the like.

The pair of paper ejection rollers 46 includes a central roller 46A, and a lower roller 46B1 and a lower roller 46C that are in pressure contact with the central roller 46A and can be driven to rotate. Similarly, the reversing roller pair 47 includes a center roller 47A and a center roller 47A.
It consists of an upper roller 47B and a lower roller 47C which are in pressure contact with A and can be driven to rotate.

FIG. 3 and tJS6 are a perspective view and a side sectional view illustrating the power transmission between the sheet discharging central roller 46A and the reversing central roller 47A. Figure 7 shows A-B-C-D- in Figure 6.
It is a 1Jlf sectional view cut along the E chain line.

In these figures, each shaft end of the opening rollers 25A and 25B, which are driven and rotated by the conveyor belt 21, has teeth JfiG1 with built-in one-way latches K1 and K2,
G2 is installed respectively. And these teeth $0
1 and G2 are always in mesh with the idle gear G3. The idle gear G3 is connected to the reversing central roller 47A.
It meshes with a gear G4 fixed to the shaft end of the shaft. The gear G
4, and a toothed pulley P1 that is integrated with
A toothed bell (B) is wound between toothed pulleys P2 fixed to the shaft end of A, and transmits the rotational force of the reversing central row 247A to the sheet discharging central roller 46A.

When the drive roller 23 rotates forward (counterclockwise) due to the forward rotation of the reversible motor M, and the resulting driving force rotates the conveyor belt 21 in the forward direction (counterclockwise), the lower intermediate roller 25B rotates. 2 in the built-in clutch
This results in idle rotation and no power is transmitted to idle gear G3. At this time, only the upper intermediate roller 25A is rotated counterclockwise by the clutch 1, and the idle gear G3 is rotated from the gear G1 to the idle gear G3.
The reversing intermediate roller 47A is rotated counterclockwise via the tooth $04. The toothed pulley P1 fixed coaxially with this drive rotation gear G4 is rotated, and the toothed belt B further rotates the toothed pulley P2, which rotates the central sheet discharge roller 46A coaxially with the toothed pulley P1 in the counterclockwise direction. let Thus, as the transport belt 21 travels in the forward direction, both central rollers 46A and 47A in the paper ejection and reversing unit 40 rotate counterclockwise to eject or reversely transport the fed document.

Next, when the reversible motor M is switched to reverse rotation, this driving force causes the conveyor belt 21 to run in reverse rotation (clockwise rotation) via the drive roller 23.

At this time, one intermediate roller 25A is connected to the one-way clutch.
is idle due to inoperation, and only the other intermediate row 225B,
The built-in clutch is integrated with the tooth $02 by 2, making it possible to transmit rotational force, and from this gear G2 to the idle gear G
3. The reversing center roller 47A is passed through the gear train of gear G4,
Furthermore, the sheet discharge center roller 48A is also moved counterclockwise via the toothed pulleys P1 and P2, and the toothed bell) B.

That is, when the conveyor belt 21 runs in either the forward or reverse direction, the reversing center roller 47A and the paper ejecting center roller 48A both rotate counterclockwise to rotate the document fed into the paper ejecting and reversing unit 40 in a fixed direction. Transport to.

FIG. 5(B) is a sectional view of the paper ejection reversing unit 40 showing a state in which originals are ejected toward the ejection tray section 80. As shown in FIG.

8 to $14 are diagrams showing the gist of the present invention, and FIG. 8 is a sectional view showing another broken surface of the paper discharge reversing unit 40 shown in FIG. 5(A). be. FIG. 9 is a perspective view of the document conveying device with the lid closed. f:1Sl
Figure O is a cross-sectional view of the document transport crrt in a state where the members of the paper ejection reversing unit (40) are opened, and Figure 11 is a perspective view of its external appearance.

A pair of paper ejection rollers 46, a pair of reversing rollers 47, and a document transport switching member 5 of a paper ejection reversing unit 40 provided above the housing 22 of the transport unit 20 in the document transport device RA5.
0, the document reversal ejection fi structure such as guide@67 is provided by the exterior member 7.
0, and the slow pP! has been done.

The external upper surface to the left of the exit opening of the exterior member 70 has a substantially flat inclined surface to receive the ejected document,
In addition, a paper discharge tray section 70A that can be stacked is formed.

A plurality of band-shaped protrusions 70B are formed on the surface of the paper ejection tray 70A in parallel in the direction in which the document travels in order to reduce friction and adhesion with the document in order to assist the movement of the document.

The protrusions 70B have a width of about 21 mm and a height of 1 to 3 mm, for example, and the spacing between the protrusions is appropriately selected depending on the size of the document to be conveyed.

Further, the paper discharge tray @7OA having the protrusion 70B has an inclined surface with the paper discharge downstream side elevated. When a document is ejected, the document is sent out from the nip position between the paper ejection center roller 46A and the driven roller 46B to the exit opening along the convex curved surface above the document transport switching member 50 of the paper ejection path 45. placed on the protrusion 70B of the paper discharge tray 70A,
When the trailing edge of the document rising along the slope is ejected from the nip position by the paper ejection speed, the trailing edge of the document is placed on the protrusion 70B and then retreats and slides down, causing the document conveyance switch to be switched. It comes into contact with the back side of the member 50 and stops, aligns the rear edges of the documents, and enters the stacked state.

On the other hand, inside the exterior member 70, there are a plurality of guide plate portions 70C for feeding the document carried out from the delivery path 41 to the nip position between the paper ejection center roller 46A and the driven upper roller 46B, and A plurality of guide plates 70D for feeding the reversing center roller 47A and the driven upper roller 47B to the nip position are integrally formed.

The guide plate portions 70C and 70D are plate-shaped with a thickness of about 2 mm, and the interval between the guide plates is appropriately selected depending on the various sizes of the documents to be transported.

The gap in the sending path 41 between the guide plate 1111s70c and the gap in the reversing path 43 between the guide plate portion 70D and the movable id 67 are respectively set to appropriate predetermined values for guiding the document through.

Further, on the inner wall side of the exterior member 70, four mounting seats 70E protrude, and the leaf spring members 72.7
3 are each fixed with screws. The upper driven roller 46B is rotatably supported by the leaf spring member 72. The upper driven roller 47B is rotatably supported by the leaf spring member 73.

When the exterior member 70 is rotated about the exterior hinge shaft 71 and is in use, the driven rows 246B and 47B are in pressure contact with the outer peripheries of the paper ejection center roller 46A and the reversing center roller 47A, respectively. Leaf spring member 72.7
3 to form a nip.

A movable hook member 74 is fixed to the inner surface of the exterior member 70 near the bottom of the handle portion 70F at the upper left end of the exterior member 70. The left wall portion of the hook member 74 is
It can be swung by a thin bending portion, and is biased outward by a coil spring 75 wound around an inner boss. The lower end of the left wall of the hook member 74 is a locking claw portion 74A, which engages and separates from a fixed side hook 22B formed integrally with a part of the housing ring 22.

When a document becomes jammed in the document transport path in the paper ejection reversing unit 40, or if the component parts in the unit 40 are repaired or
When inspecting, by grasping the gripping part 70F of the exterior member f0 and pressing the front wall part 74G of the movable hook member 74, the locking claw part 74A retracts and engages with the fixed hook 22B. The connection is released and the state becomes open. Subsequently, when the exterior member 70 is rotated around the exterior hinge pongee 71 to the open state shown in FIGS. 10 and 11, the reversing passage 43, the delivery passage 41, etc. are exposed. .

Next, when the movable guide plate 67 is opened in the summer clockwise direction around the hinge ring 67Δ as indicated by the dashed dotted line arrow in the tIS12 diagram, the entire circumferential surface of the paper ejection center roller 46A and the paper ejection center roller Most of the reversing path (original reversing transport path) 44 near the upstream and downstream sides of transport 46A, the opening of the reversing insertion path 42 above the separation ID plate 49, and the opening of the delivery path 41 above the U-turn guide plate 56 Each part will be exposed and opened.

By creating such an open state, a jammed document can be easily, quickly, and safely taken out without being damaged. Further, it is easy to inspect and repair the above-mentioned reversing conveyance member. After taking out the document and inspecting the parts, the inner guide member and the outer guide member are sequentially moved and returned to their original positions, so that the document can be transported again immediately.

FIG. 13 is a cross-sectional view of the document conveying device 5 partially lifted to open the upper surface of the document table glass 2. As shown in FIG.

When copying with Ike's special original sheet placed on the surface of the glass platen glass 2, or when copying with a book-like IQ manuscript placed on the surface of the glass platen glass 2, or when copying originals that have remained on the surface of the glass platen glass 2 due to transport failure. When taking out the document or cleaning the surface of the document table glass 2, the housing 2 of the transport unit 20
Lift the handle 22A protruding from one end of the handle 22A and rotate it counterclockwise as shown by the dashed line in the figure to open the handle 22A.

By this opening operation, the conveyance unit 20 and the paper discharge reversing unit 40 are tilted, and the paper discharge tray 70A of the exterior member 70 is also tilted, centering on the pongee of the paper feed roller 17.

At the same time, the paper discharge tray support rod 83 is rotated counterclockwise about the shaft support 1ff+12A on the upper part of the cover member 12 of the paper feed unit 10 as a rotational reference point, and the upper j! The part a pushes up the bottom of the paper discharge tray 81 of the discharge tray section 80. As a result, the paper ejection tray 81 is attached to the supporting shaft portion 82 provided in the housing 22.
The paper discharge tray 70A and the paper discharge tray 81 are tilted in a V-shape by rotating clockwise around the center. □ If the original fiD is moved onto the surface of the paper ejection tray 81 before the above-mentioned opening operation, the original document tray comes into contact with the protrusion 81A and comes to a halt as described above, and the paper ejection tray 70A and the paper ejection tray 81
The document will not enter the vicinity of the boundary of the document 22 and become caught in the document 22, making it difficult to take out the document or causing damage to the document.

Figure MS14 is a perspective view of the document conveying device with the paper ejection tray 81 and the support member removed.

Two shaft supports 12A are integrally provided on a part of the upper surface of the cover member 12 that covers the paper feed unit 10. A support member (sheet discharge tray support rod) is provided in the bearing hole of the shaft support 12A.
The tips of both legs i' 583a at one end of 83 are respectively fitted. The support member 83 is made by bending a metal round bar or the like, has elasticity, and can be easily pushed into the bearing hole of the shaft support 12A at a fixed position.

The arm portion 83b of the support member 83 is bent at an obtuse angle, and the upper arm portion 83b comes into contact with the bottom protrusion 81C of the paper ejection tray 81 when the document conveyance device is used.

A further upper portion of the support member 83 is a connecting portion 83c, and near both ends of the connecting portion 83c, a receiving portion 81B for a paper discharge tray, which will be described later, is fitted into the connecting portion 83c.

A pocket portion 81E having an opening is formed in the receiving portion 81B of the paper discharge tray 81. The paper discharge tray 81 is ^BS
It is made of resin etc. The vicinity of the opening is elastically deformed by the press-fitting of the connecting shaft portion 83c of the support member 83, and is pushed through. The press-fitted connection shaft portion 83c of the support member 83 is
It enters the pocket section 81E.

When it becomes necessary to disengage the paper ejection tray 81 and the support member 83, lift a part of the document conveyance device and
After tilting as shown in Figure 3, if the support member 83 is pulled out a little forcefully, the connecting shaft part 83e will escape from the pocket part 81E and can be easily disassembled as shown in Figure WS13.

If the document platen during automatic transport stalls on the surface of the document lath 2, or if you wish to clean the document platen lath 2 or the transport belt 21, lift the handle 22A at the right end of the housing 22 of the transport unit 20. Then, the housing 22 is rotated counterclockwise to a stop position where the housing 22 is approximately upright. At this time, the conveyor belt 21 is also in an almost upright position, and the upper part of the document table lath 2 is wide (open).
Then, the paper ejection reversing unit 40 is tilted to an upright state.

In this upright state, the support shaft 8 at the top of the housing 22
2 moves along a trajectory shown by a dashed line centered on the paper feed roller 17. As a result, the right end of the paper discharge tray 81 is held by the support shaft portion 82 and rotates, and the connecting shaft portion 83c of the support member 83 held in the center portion 81B of the paper discharge tray 81 is The arm portion 83b of the support member 83 moves while drawing a locus shown by the dashed line in the figure, and then rotates around the shaft support 12A and comes to a stopped state. During this rotation, the inclination angle of the paper ejection tray 81 hardly changes from the beginning to the stop position, and the document placed on the upper surface of the paper ejection tray 81 comes into contact with the lower protrusion 81A. The paper is held stationary in an aligned state and does not fall off.

Next, the double-sided document conveying operation of the document conveying device according to the present invention will be explained in detail based on the chart 70 in FIG. 15, the timing chart in FIG. 16, and the block diagram in FIG. 17.

By driving the drive roller 23 in forward rotation (counterclockwise rotation), the conveyor belt 2 stretched between it and the driven roller 24 is rotated.
1 is rotated, and an intermediate roller 25A and pressing rollers 27A and 27B are disposed inside the conveyor belt 21.

Both the belt pressing roller 28 and the separation roller 3B rotate in the same direction.

At this time, the roller surface 38b of the separation roller 38 comes into pressure contact with the conveyor belt 21 and rotates as a result of the rotation.
8a rotates to the right from the left abutment surface 39a of the separated loaf bearing 39 and moves upwardly along the id inclined surface 39c. This movement of the separation row 238 to the right causes the conveyor belt 21 to protrude outward to the right.

FIG. 2, FIG. 5(A), FIG. 6, and FIG. 8 show the state at the start of the shaft movement, and FIG. aS (B) shows the state after the shaft movement, respectively.

When the state shown in FIG. 5(B) is reached, the tip of the separation guide plate 49 that partitions both the document sending path 41 and the reverse insertion path 42 is located close to the rightward protrusion of the conveyor belt 21, and the reverse insertion path 42 openings (e.g. approximately Q, 5++
++a). Note that if the visible plate 49A1, for example, film-like polyethylene terephthalate, is attached to the tip of the separation guide plate 49 so as to slightly protrude, the conveyor belt 21 can be made flexible even when the conveyor belt 21 is sagging or fluttering. Since it only contacts the tip of the plate 49A, it does not directly contact the rigid separation guide plate 49 and cause wear or damage to the conveyor belt 21.

When the drive roller 23 is driven to rotate in the reverse direction, the conveyor belt 21,
The driven roller 24 begins to rotate in reverse. As a result, the separation roller 38, which is in pressure contact with the conveyor belt 21 and rotates as a result, is reversely rotated, and its sleeve ends begin to move leftward from the right abutment surface of the separation roller bearing 39, and rotate along the id slope. plS5 (A) shows this retrograde stopped state.

On the other hand, a document conveyance switching member (hereinafter referred to as a switching member) 50 provided near the upper part of the paper ejection reversing unit 40 is integrated with a support shaft portion 50a. It is installed between both side plates and is rotatable.

A plurality of guide plate portions are integrally provided in the middle of the supporting shaft portions 50a at both ends of the switching member 50 to restrict the bifurcation of the original document into the paper discharge path 45 and the reversing path 43,44. A plurality of the guide plate portions are provided in parallel in the axial direction at intervals corresponding to the maximum paper width of the original document passing through each of the passages, and among them, the guide plate portions on both sides of the roller portion of the paper ejection central roller 46A are provided in a predetermined manner. The interval is maintained at .

Further, the upper surface of the guide plate portion forms a gently upwardly curved convex surface, and when the switching member 50 is in the IJX draft paper state (FIG. 5(B)), the convex curved surface is ejected. paper center roller 4
6A and the upper roller 46B press against each other to form a nip, the upper roller 46B forms an inclined surface that rises obliquely upward toward the downstream direction of sheet discharge, and the top surface of the upper roller 46B is higher than the nip position.

The document sent from the delivery path 41 to the paper ejection rollers 46A, 46B is sent out almost horizontally from the nip position by the pressure rotation of both rollers, but it is sent diagonally upward along the convex curved surface of the guide plate. The sheet rises, passes through the top curved surface, passes through the sheet discharge path 45, and is discharged onto the tray section 80 outside.

During this paper ejection process, the original fiD in a flat shape that is pinched and sent out from the nip position of the paper ejection rollers 46A and 46B is moved between the document conveyance switching members 50 on both sides of the paper ejection roller 46A. When the original fJliD passes through the upwardly convex mountain surface, the original surface is bent into a wave shape parallel to the paper ejection direction, so that strength is imparted to the original fJliD in the traveling direction.

Therefore, the document is ejected outside in a large arc along the convex curved surface, and the rear end of the document is in the paper ejection path 4.
Since the paper does not stay near 5, the problem of paper ejection is solved.

On the other hand, the lower curved surface of the guide plate portion forms a gentle concave curved surface, and when the original 8'SD is introduced from the nip position of the paper discharge center roller 46Δ into the reversing path 43 as shown in FIG. 5(A). It forms the guide surface of.

When a copied document is to be discharged to the discharge tray section 80, the original mD enters the discharge path 41 from the right end of the document glass 2 and rises due to the pressing force of the pressure rollers 27A and 2713 and the conveying force of the conveyor belt 21. The paper is made a U-turn, is pressed and held between the paper ejection rollers 46A and 46B, is ejected outward from the right ejection opening, and is placed on the ejection tray section 80 with the first side facing upward.

In the paper discharge path 45, a static elimination brush 58 having substantially the same shape as the static elimination brush 57 is fixed to a lid member of the document conveying device, and rubs against the document to be discharged to the outside to eliminate static electricity on the document.

When copying both sides of a document, the switching member 50 is swung counterclockwise as shown in FIGS. The lower surface of the plate guides the Ig paper conveyed from the upper pressure contact position of the paper discharge central roller 46A to the lower left. This original MD is sent to the reversing path 43, makes a U-turn again at the reversing center roller 4FA, passes through the reversing path 44, passes through the downward pressure contact position of the sheet discharge center roller 46A and the lower roller 46C, and is reversed. It is sent out in the direction of the feeding passage 42. At this time, since the conveyor belt 21 is rotating in the reverse direction, the separation roller 38 is retracted to the left, and the opening of the reversing insertion passage 42 is open.

In addition, from the front end detection sensor 48A to the rear end detection sensor 4
The path length of the reversal section leading to 8B is determined by each Kashihara 1 used in advance.
It is set to be sufficiently longer than the maximum length of the iD.

Further, as described above, the pair of paper ejecting rollers 46 and the pair of reversing rollers 47 are both connected to the conveyor belt 21 by the intermediate rollers 25A and 25B which have one-way latches Kl and 2 built-in.
It always rotates counterclockwise regardless of the pod rotation, and the original fi
Convey D in one direction.

R that has been sent onto the document table glass 2 and has finished exposing the document surface.
mD is from the delivery path 41 to the paper ejection roller 46 of the paper ejection reversal unit 40, the reversal row 247, and the reversal path 43.
44, the front and back sides are reversed, and the document is conveyed from the reversing insertion passage 42 by the conveyor belt 21 with the second side facing the upper surface of the lath 2.

During this document reversal conveyance, when the trailing edge of the original passes through the leading edge detection sensor 48A installed near the upper part of the paper ejection roller pair 46 in the paper ejection reversing unit 40, the leading edge detection sensor 48A After a predetermined count has elapsed since the detection signal J:, the motor drive relay is activated and the normal rotation of the motor M is temporarily stopped. As a result, the forward running of the conveyor belt 21 is also temporarily stopped.

Even after this motor stop signal is input, the motor drive shaft rotates slightly due to inertia, and an encoder E directly connected to the drive shaft counts inertia pulses until the motor stops. The conveyor belt 21 is temporarily stopped for a predetermined short time (for example, 100 Ils) after the interval of inertia pulses due to the decrease in the rotational speed of the drive shaft exceeds 10 m5.

After the predetermined short time has elapsed, a reverse rotation ON signal is input to the reversible motor M, and the reversible motor M starts reverse rotation.

As a result, the rotation of the conveyor belt 21 is switched to the clockwise direction (reverse rotation), but the paper discharge rollers 46A and 47A continue to rotate in the same direction.

Immediately before the reverse transfer row of the conveyance belt 21 is started, a signal is input to the electromagnetic slide/id 35 after the sensor 48A detects the trailing edge of the document. As a result, Bluntsuya 35
A is sucked, and the fixing pin 35B of the plunger 35A is
It engages with the elongated hole 34a of the swing lever 34, and the fixed center shaft a
The swing lever 34 is swung clockwise around the IS 34b.

Along with this, the shaft portion 34m at the other end of the swing lever 34 is
Since it is engaged with the elongated hole 33a of the link plate 33, the swing lever 34 can be swung clockwise, and the link plate 33, which forms an integral part,
The swinging wheel 31 and the swinging arm 30 are connected to both shaft ends 11i33.
Rock counterclockwise around a! ! I am made to do ilJ.

This counterclockwise swing causes the recess 30 of the swing arm 30 to
a is fitted into and grips the stepped portion 28b of the belt press roller 28, and restricts the horizontal movement of the belt press roller 28;
Hold it so that it can rotate freely.

When the double-sided copying mode of the original document is set, after a predetermined count has elapsed after the trailing edge of the original is detected by the sensor 18, the solenoid is energized, and the R document conveyance switching member 50 interlocked with this is activated as shown in FIGS. 2 and 5. As shown in (A), the switching member 50 is swung counterclockwise to block the paper ejection passage 45 (1111), and the lower surface of the switching member 50 directs the original document conveyed from the upper pressure contact position of the paper ejection roller pair 46 to the lower left. This original 1iD is sent to the reversing passage 43, makes a U-turn again at the reversing row 2 pair 47, passes through the reversing passage 44, passes the downward pressure contact position of the paper ejection roller pair 46, and passes through the reversing insertion passage. 42 in the direction of the document glass 2. While the document is passing through, the charge eliminating brush 57 rubs the surface of the document plate to ground and eliminate static electricity on the original 8%D surface.

In this way, during the reverse transfer of the conveyor belt 21, the belt holding roller 28 near the left end of the document platen glass 2 is latched onto the swinging member 30 and is at a position away from the stopper plate 3. Rotate from the paper feed unit 10 to the original platen.
This facilitates insertion into the lath 2. At the same time, the separation roller 38 near the right end of the document table lath 2 rotates from the reverse transfer line of the conveyor belt 21 to a position where it closes the opening of the reversal insertion path 42, preventing the original 1iD from entering and moving it toward the delivery path 41 side. It is only possible to pass through.

By passing through the reversing path of the paper ejection reversing unit 40, the original document is inverted on its front and back sides, and is sent onto the document glass platen 2 with its back side, that is, the second side, facing the upper surface of the document platen glass plate 2, and then transferred to the conveyor belt 21. further conveyed.

When the rear edge of the document passes through the rear edge detection sensor 48B, the rear edge detection signal activates the motor drive relay to temporarily stop the reversible motor M from rotating in reverse. As a result, the reverse running of the conveyor belt 21 is temporarily stopped, and the rotation of the belt press roller 28, which is in sliding contact with the conveyor belt 21 and rotates as a result, is also stopped.

After the belt holding roller 28 stops rotating, the solenoid 35 is activated! The B1 signal is input, and the belt presser roller 28
Release the axis position restriction.

Before the second restriction was lifted, the belt presser roller 28 had a shaft end 2
8a is in the upper position resting on each shaft support of the bearing member 29,
It is driven and rotated by a conveyor bell) 21.

Therefore, the conveyor belt that comes into pressure contact with the belt presser a-ra 28)
The lower surface of document plate 21 is separated from the upper surface of document table glass 2 by a slight gap g below this pressure contact position. That is, the conveyor belt 21 pressed against the upper surface of the document table glass 2 by the pressing rollers 27A and 27B is in a non-contact state at the position of the belt pressing roller 28 located near the stopper plate 3, so that the above-mentioned The original W4 is transported in the direction of the stopper plate 3 by the reverse transfer line of the transport belt 21.
The running tip of D is caused by excessive conveyance pressing force, and the stopper plate 3
There is no possibility that the document will strongly abut against the stepped portion 3a, causing problems such as edge folding, wrinkles, and poor copy positioning of the document.

The approach of the leading edge of the document tray to the stepped portion 3a is detected by setting a predetermined count based on the document passing signal and document size detection signal of the trailing edge detection sensor 48B, and by increasing this count.

Based on this document passing signal, a signal is input to the electromagnetic solenoid 35, and the plunger 35A protrudes after the motor reverses and stops 1, the conveyor belt 21 runs in reverse and stops, and the driven rotation of the belt presser roller 28 stops. do. As a result, the swing lever 34 swings counterclockwise around the rotation center shaft 34b, and the swing arm 30 is rotated clockwise around the swing shaft 31 via the link plate 33 that engages with the swing lever 34. Since the belt is swung in the direction and flipped up, the engagement between the swinging arm 30 and the belt presser roller 28 is released, the shaft position restriction of the belt presser row 228 is released, and the belt presser row 228 becomes movable.

The belt presser roller 28 is deregulated during the reverse running of the conveyor belt 21 due to the motor reversal and stop, and after a short period of time, the motor drive relay is activated again and the motor M resumes reversing. Then, the conveyor belt 21 starts running in reverse again.

The roller surface 28e of the belt presser roller 28, which is in sliding contact with the inner surface of the conveyor belt 21 that is traveling in reverse, is movably driven and rotates clockwise, and the shaft end 28a is guided into each groove 29a of the bearing member 29. The robot is moved and pulled leftward, approaching the left end surface of the groove 29a.

When the belt presser row 228 is moved to the left, its shaft end 28a separates from each groove 29a of the bearing member 29, falls into the opening below, and moves to the position shown in FIG. 4(B). do.

In this illustrated state, the conveyor belt 21 is pressed from the back side by the roller surface 28c of the belt presser roller 28, and the front side of the conveyor belt 21 is lightly pressed against the stepped portion 3a of the stopper plate 3, thereby closing the gap g. , the leading edge of the document transported in the reverse direction reliably abuts against the stepped portion 3a of the stopper plate 3 and stops, and does not enter the paper feeding unit side. After one end of the document tray comes into contact with the stopper plate 3, the motor drive is stopped, the reverse rotation of the conveyor belt 21 is stopped, and the document tray stands still.

The document placed at this precise stopping position is transferred to the conveyor belt under pressure from multiple belt pressers A-RA 2 A and 28B).
21, the document is pressed onto the document table lath 2, and exposure of the second side (back side) is started. After that, an image is formed and transferred to the recording paper through a well-known process, and one-sided copying is completed. At this time, the image position on the recording paper and the original image position on the document are accurately maintained.

After the exposure of the back side of the document is completed, the conveyor belt 21 rotates in the normal direction, and the original fiD is fed into the paper ejection reversing unit 40 from the delivery path 41, and as described above, the paper ejection roller pair 46 and the reversing The document is reversely conveyed from the reversing insertion path 42 onto the document glass 2 through passages 43 and 44 and a pair of reversing rollers 47. At this point, the conveyor belt 21 performs a reverse transfer row, and during this time, the belt pressing roller 28 is regulated by the slip/id 35. Further, the temporary stop at the end of the reverse feeding and the release of the restriction on the belt pressing roller 28 are performed in the same manner as described above.

The document is thus transported onto the document platen glass 2, its tip is brought into contact with the stepped portion 3a of the stopper plate 3, and stopped at a predetermined position.The first side (front surface) of the document is exposed, and an image The forming process takes place within the main body of the copying machine. After the exposure of the back side of the document tray is completed, the conveyor belt 21 is rotated in the normal direction, and the document tray is transferred from the feeding path 41 to the switching member 50 with the reversing path closed between the pair of paper ejection rollers 46. It passes through the upper surface and is sent out onto the ejection tray section 80 via the ejection passage 45. As copying is repeated, the original IDs are sequentially stacked.

Figure f518 (A> is a diagram showing the document transport path,
The -1αa line shows the path. According to this conveyance device, the document receiver of the feeding unit 10 places the document f! on the table 13. The bundle D is placed with the front (second side) DIA of the first page (Dl) of the original facing down. Then, the document is fed from the last page (for example, D6), and after being reversed, the back side D6B of the document D6 is copied, and then after being reversed again, the front side D6A of the original fiD6 is copied. Original fiD
The surface D6A of No. 6 is placed facing upward.

Subsequently, the next original document D5 is transported and copied, and the next document D5 is transferred to the output tray section 8.
It is placed on the original D6 at 0.1=.

All the original documents that have been copied in this manner are stacked on the ejection tray section 80 with the pages aligned with the front surface (DIA) of the first page (Dl) facing upward.

The document conveyance device of the present invention can also be set to a copy mode for only one side of the original fiffi. tjStS diagram (
B) is a diagram showing the document conveyance path in this case, and - point M
m is the original passage path. Furthermore, the area within the circular broken line is a partially enlarged view illustrating the document stacking state.

In the document tray 10, the stack of documents stacked on the stand 13 is placed with the first page (the front side) facing down, with the first page at the bottom, and the document tray 10 is placed with the first page (front side) facing down. ) 20 and a paper ejection reversing unit ) 40 before being ejected to the ejection tray section 80 . At this time, the document does not pass through the reversing passages 43, 44 and the reversing insertion passage 42, but passes from the delivery passage 41 to the paper ejection roller pair 46, and then from the paper ejection passage 45 to the ejection tray. ! It reaches 1s8G. In addition, the belt pressing roller 28 at the entrance of the conveyance unit 20 has
The regulating operation of the swing arm 30 by the solenoid 35 is not activated, and the roller 28 slides in contact with and follows the forward and reverse rotation of the conveyor belt 21, and is freely movable in the forward and reverse directions and left and right by the bearing member 29.

The trailing edge of the document being conveyed by the conveyance belt 21 while sliding to the right on the document table glass 2 passes the sheet trailing edge detection sensor 18 , and then the trailing edge of the document fnD passes the stopper plate 3 . After that, it overruns slightly and stops temporarily. This is determined by counting up a clock pulse value set according to the length of the detected document size, starting from the generation of the trailing edge detection signal by the sensor 18.

At this point, the drive signal for forward rotation of the reversible motor M is turned off, and then a start signal for reverse rotation is applied to the motor.

As the motor M starts to drive in the reverse direction, the conveyor belt 21 starts running in the reverse direction, causing the overrun document to move backward, and after the reversible motor M is rotated in the reverse direction by a predetermined pulse, the rear end of the document is brought to a stopper. When it comes into contact with the stepped portion 3a of the plate 3, the conveyor belt 21 stops running.

When the conveyor belt 21 runs in reverse, the belt presser roller 28 whose shaft end is movable is rotated clockwise by the frictional tension of the circumscribing conveyor belt 21, while the shaft end 28a is rotated clockwise by the bearing. Groove portion 29a of member 29
It rolls to the left along. When the roller surface of the belt press roller 28 is located above the stepped portion 3aL:R of the S)7 pa 3, the shaft end 28a of the belt press roller 28 is located on the left end surface of the groove 29& of the bearing member 29. , and here only driven rotation occurs. At this left end position, the belt presser row 228 comes into light pressure contact with the stepped portion 3a of the stopper plate 3 via the conveyor belt 21, thereby closing the mFiXg.

The leading edge of the original document fed in the reverse direction reliably hits near the stepped portion 3a of the stopper 3 in this closed state,
By stopping the transport belt 21, the document tray is placed at an accurate stop position. In other words, original paper is completely prevented from entering the paper feed unit 10 through the gap.

The document placed at this precise stop position is pressed onto the document table glass 2 by the conveyor belt 21 under pressure from the plurality of pressure rollers 27A and 27B, and exposure of the first side (front surface) is started. Thereafter, an image is formed and transferred to the recording paper through a well-known process to complete one-sided copying.

At this time, the image position on the recording paper and the original image position on the document are accurately maintained.

The original ID that has completed the copying process on the first side is moved to the right on the original and stacking table glass 2 by the normal rotation of the conveyor belt 21, and is fed into the paper discharge reversing unit 40.

The document is transferred to the document table lath 2 by the conveyance force of the conveyor belt 21.
The paper enters the delivery passage 41 from the right end, ascends, makes a U-turn, is held in pressure contact with the upper position of the paper ejection roller pair 46, and is ejected outward from the left paper ejection passage 45.
It is placed on top with the first side facing upward. At this time, the switching member 50 is lowered and enters the sheet discharge center roller 46A, and guides the document toward the sheet discharge path.

Note that the stacking order of the stack of originals stacked on the table 13 of the original document receiver and the stacking order of the originals discharged onto the discharge tray section 80 are both the same as in the double-sided original copying mode described above.

〔Effect of the invention〕

As described above, the present invention provides an automatic document feeder that inserts and sends a document onto a platen glass platen using a conveyor belt that runs in forward and reverse directions, thereby making it possible to copy the document. By installing the document tray above the document transport section above the lath, it does not require any special installation space and is compact, making it easy to operate when opening and closing the document transport device. ing. Furthermore, by making the transport section openable and closable, document jamming, repair, and inspection within the reversing transport section can be done quickly and easily.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a copying machine equipped with a document conveyance device according to the present invention, FIG. 2 is a sectional view of the document conveyance device showing the document conveyance path, and FIG. 3 is a perspective view showing the drive system of the document conveyance device. Figures 4(A) and 4(B) are cross-sectional views showing the main parts near the drive roller of the document conveying device, MS5(A),
(B) is a sectional view of the document ejection reversing unit, FIG. 6 is a side sectional view showing the drive system of the document ejection reversing unit, and FIG. 7 is its A
-B-C-D-E The developed cross-sectional views taken along the chain line, FIGS. 8 to 11, illustrate the gist of the present invention.
The figure is a cross-sectional view showing another broken surface of the paper discharge reversing unit shown in FIG. FIG. 11 is a cross-sectional view of the document conveying device with its members opened, FIG. Cross-sectional view of the state in which the document platen glass is opened by lifting the unit, 1st
Figure 4 is a perspective view with the paper ejection tray open, Figure 15 is a flowchart explaining the document conveyance process, figure @16 is a timing chart, figure m17 is a block diagram showing control of document conveyance c position, figure ptS18. (A) and (B) are explanatory diagrams showing conveyance paths for a double-sided original and a single-sided original. 1...Copying device main body 2...Original table is lath 3.
...Stopper plate 5...Document transport device 10...
・Paper feeding unit (paper picking section) 20... Conveying unit (conveying section) 21... Conveying belt 22... Housing 22A...
・Handle 22B...Fixed side 7 hooks 23...
・Drive roller 24...Followed roller 25A, 2
5B...Intermediate roller 40...Sheet discharge reversing unit (reversing section) 43.44.
... Reversing path 46 ... Paper ejection roller pair 47 ...
Reversing roller pair 49... Separation ID plate 50...
Document conveyance switching member 56...U-turn guide plate 57.
58... Static elimination brush 67... Movable ID plate 70
...Exterior member 70A... Paper discharge tray section 71.
... Exterior hinge pongee 74 ... Movable side hook member 8
0... Ejection tray section (paper ejection section) 81... Paper ejection tray 82... Hinge pongee 83
... Support shaft member (sheet discharge tray support rod) D, Di, D2. D3. D4. D5. D6... Manuscript applicant Konishiroku Photo Industry Co., Ltd. Procedural amendment August 21, 1986

Claims (2)

[Claims] (1) A paper feeding section, a conveying section, a reversing section, and a paper ejecting section are provided above the document glass, and a sheet of original is fed from the paper feeding section onto the document glass, and the conveyor belt of the conveying section feeds the document onto the document glass. Transport the original,
Further, in a document conveying device configured to expose a first side of a document by a reversing section configured with a reversing path, and then invert the document to expose a second side, the document is then discharged to a paper discharge section having a document discharge tray. . A document conveying device, characterized in that a reversing section is provided above the conveying section. (2) The document conveying device according to claim 1, further comprising a reversing section and a paper ejecting section provided above the conveying section.