JP3455657B2 - Transfer device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveying device for sandwiching a conveyed product by a driving roller which is rotated by a driving source and a driven roller which is pressed against the driving roller and is driven to rotate, and discharges the conveyed product. The present invention relates to a sheet conveying device.

[0002]

2. Description of the Related Art As a conveying device such as a copying machine or a printer,
There was a thing described in Japanese Patent Publication No. 7-84276.

In order to understand this carrying device, the configuration and operation of the prior art will be described using the scanner device shown in FIGS. 11 and 12.

In this scanner device, an upstream conveying roller 21 and an upstream driven roller 23, which is pressed against the upstream conveying roller 21 by a spring 22 and is rotated by being driven by the upstream conveying roller 21, are arranged on the upstream side of sheet conveying. It is arranged. The sheet P nipped and conveyed by the upstream side conveying roller 21 and the upstream side driven roller 23 is read by the image sensor 24 provided on the downstream side of the rollers 21 and 23, and further on the downstream side arranged further downstream. The sheet P is held by the transport roller 25 and the downstream driven roller 27 that is pressed against the downstream transport roller 25 by the spring 26, and is discharged.

When the leading edge of the paper P is between the upstream rollers 21 and 23 and the downstream rollers 25 and 27, the paper P is transported by the upstream rollers 21 and 23 to the image sensor 24. To read. The trailing edge of the paper P has upstream rollers 21 and 23 and downstream rollers 25 and 27.
When the sheet P is between the sheet and the sheet, the sheet P is conveyed by the rollers 25 and 27 on the downstream side, and the image sensor 24 reads the sheet P.

The upstream side transport roller 21 and the downstream side transport roller 25 are connected to a drive motor (not shown) via gears 21b and 25b fixed to the roller shafts 21a and 25a and a gear series (not shown). There is.

As the image sensor 24 for reading the paper P, a contact type image sensor or a reading type image sensor using a lens reduction optical system and CCD is used.

The upstream side transport roller 21 and the image sensor 2
A P-in lever 28 is arranged between the sheet and the sheet 4 to detect the entry of the sheet P. The P-in lever 28 rotates about a rotation shaft 28a, and a shutter portion 28b at the other end of the P-in lever 28 opens and closes a photo interrupter 29 in response to the entry of a sheet. When the photo interrupter 29 is turned on, the entry of the leading edge of the sheet P is detected, and when it is turned off, the passage of the trailing edge of the sheet P is detected (hereinafter, P-i).
n sensor).

Further, a P-out lever 30 and a photo interrupter 31 similar to the above-mentioned P-in sensor are arranged between the image sensor 24 and the downstream-side conveying roller 25, and the front end (rear end) of the paper P is set. ) Has reached that position (hereinafter referred to as the P-out sensor).

After the P-in sensor detects the passage of the leading edge of the paper P, the image sensor 24 starts reading after a predetermined time. After that, if the P-out sensor cannot detect the entry of the leading edge of the paper P after a predetermined time, the paper P
Indicates that a paper jam has occurred between the P-in sensor and the P-out sensor, the driving of the transport roller is stopped, and a message indicating that the paper is jammed is displayed.

If the P-out sensor cannot detect the entrance of the leading edge of the paper P and the P-in sensor cannot detect the passing of the trailing edge of the paper P after a predetermined time,
It is determined that the paper P is jammed at the downstream side transport roller portion, the driving of the transport roller is stopped, and an indication that the paper is jammed is displayed.

In such a structure, when the sheets are continuously inserted, the distance between the trailing edge of the passing sheet and the leading edge of the next sheet (inter-sheet distance) is shown in Japanese Patent Publication No. 7-84276. It is necessary to have a distance larger than the range in which the swinging member of the detection sensor swings. If the distance between the sheets is less than the swing range, the sensor will detect that a paper jam has occurred. Since the inter-paper distance is required to be greater than the swing range, if a swing member that requires a large swing range is provided, the total sheet transport speed (the number of sheets that can pass per unit time) becomes slow.

In the case of reading a downward document by continuously inserting paper sheets, it is desirable that the continuously ejected paper sheets are stacked with the front side facing down. Depending on the curl or the like of the discharged paper P as shown in FIG. 13, the next paper is not always discharged on the front discharge paper, and when it is sunk to the lower side, the discharge order is the insertion order. Don't When the P-out sensor is arranged as in Japanese Patent Publication No. 7-84276, the discharge state of FIG. 13 is considered to have caused a paper jam because the detection lever continues to be pushed down, and the discharge of the paper is stopped. .

Further, in the case of reading an original document facing upwards as opposed to FIG. 13, or in a printer or the like which discharges with the printed surface facing upwards, the originals are discharged and stacked in the reverse order of the original insertion order, or printed. Documents are stacked in the reverse order.

In the paper jam detection that occurs after the front end of the paper is detected by the P-out sensor, the conveyance rollers continue to be driven for a predetermined time until the paper jam is detected.
As shown in FIG. 14, when the driving is stopped, the original has already been deformed into a bellows shape and the original has been damaged.

That is, when an A4 size original is read in the vertical feed mode, after the leading edge of the paper is detected by the P-in sensor, after the A4 vertical dimension of 297 mm + α is fed by the transport roller,
If the P-in sensor cannot detect the trailing edge of the paper, it is determined that a paper jam has occurred, and the driving of the roller is stopped. When the distance between the upstream side roller and the downstream side roller is about 50 mm, an A4 size document of about 297 mm is compressed into a bellows shape of 50 mm. Such a paper jam causes definite damage to the original document, and must be avoided.

Therefore, as shown in FIG. 15, a P-out sensor is arranged on the downstream side of the downstream side transport roller, and a third (sheet discharge) roller 32 dedicated to sheet discharge is provided. There is something.

If the P-out sensor cannot detect the entrance of the leading edge of the paper after a predetermined time has elapsed after the P-in sensor detects the entrance of the leading edge of the paper, the original paper is fed between the P-in sensor and the downstream side conveyance roller. If the paper jam occurs, the drive of the transport roller is stopped and a message indicating that the paper is jammed is displayed. The predetermined time in this case is the time + α for the leading edge of the paper to pass the distance between the P-in sensor and the P-out sensor, and even if a paper jam occurs, the roller drive is stopped before the original paper becomes bellows-shaped. It is possible.

After the P-out sensor detects the entry of the leading edge of the paper , the pressure contact force of the driven roller is set to be weak so as not to cause the paper jam at the paper discharge roller 32. Discharge outside the device. Further, the paper ejection roller 32 is provided with a projection 32a for kicking out the rear end of the paper so that the paper can be reliably ejected to the rear end of the paper in the paper ejection order.

[0020]

However, as shown in FIG.
With the above configuration, if a paper jam occurs in the paper ejection roller,
It has not been solved that the above-mentioned bellows-like paper jam occurs. Also, the projections for kicking out the trailing edge will slip on the surface of the document when the paper is conveyed, and may damage the document surface.Therefore, it is necessary to form it with a soft material and use a material with excellent wear resistance. It becomes an expensive part because it must be used. In addition, since the paper discharge roller that is the third roller is required, there is a problem that the cost increases due to the increase in the size of the device and the increase in the driving load.

[0021]

In order to solve the above-mentioned problems, a conveying device according to a first aspect of the present invention is a sheet-like device comprising a driving roller which is rotated by a driving source and a driven roller which is rotated by being pressed against the driving roller. the conveyance was sandwiched in the transport device for discharging the sheet conveyed in the conveyance object stacking tray, in either of the rotational shaft of the driving roller or the driven roller is rotatably loosely, the projecting portion on one end , The
On the opposite side of the protrusion with the rotation axis sandwiched,
Was closed and a weight portion to be positioned towards, e Bei the rear end pressing member, the protrusions than the outer periphery of the rear end pressing member coaxial with the roller, is formed by projecting the other roller side, The trailing end pressing member is less than a roller coaxial with the trailing end pressing member.
Non-conveying surface that always has a small diameter and does not come into contact with sheet-like conveyed objects
And contact the sheet-like conveyed object to convey the sheet-like conveyed object.
The transport surface for rotating the rear end pressing member is formed by
And has a disk portion, the sheet conveying object is conveyed, the leading end of the sheet conveyed will abut on the protruding portion,
It is necessary to press the above-mentioned protrusion in the conveying direction of the sheet-like conveyed article .
The rear end pressing member rotates, and the rear end pressing member
When the member rotates, the above-mentioned transport surface transports the sheet
It comes into contact with the transported material and is driven by the transportation of the sheet-shaped transported material.
The trailing edge pressing member starts to rotate, and
The sending surface is positioned to face the conveyed sheet-like object
With the abutting of the protrusion on the lower surface of the conveyed sheet-shaped conveyed product, rotation of the rear end pressing member is blocked, and the rear end of the conveyed sheet-shaped conveyed product is
When passing the position of the protrusion , the rear end pressing member,
Rotated by the weight of the weight portion, the rear end of the conveyed Sea <br/> preparative shaped transport material, pressed by the protrusion rotates, is characterized in that kick into conveyed stacking tray.

[0022]

According to a second aspect of the present invention, the diameter of the upper disc portion on the conveying surface is made slightly smaller than the diameter of the roller coaxial with the rear end pressing member.

[0024]

According to a third aspect of the present invention, there is provided a conveyed object detection switch for detecting the sheet-like conveyed object, and when the rear end pressing member is forcibly rotated by the disk portion, the conveying device interlocks with the rear end pressing member. Switch operation means for opening and closing the object detection switch is provided.

According to a fourth aspect of the present invention, the protrusion of the rear end pressing member is provided at a position separated from the other roller by 5 mm or more.

According to a fifth aspect of the present invention, the projecting portion of the trailing end pressing member is formed so as to be tilted when a force larger than the carrying force of the sheet-shaped conveyed product is applied to the projecting portion.

The conveying apparatus of claim 6, the rear end pressing member is provided with a reverse rotation preventing means for preventing rotation of the conveying direction and opposite direction of the sheet conveyed.

According to a seventh aspect of the present invention, the protrusion of the trailing end pressing member is provided with a catching portion for catching the trailing end of the sheet-like conveyed product.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a carrying apparatus of the present invention will be described with reference to FIGS.

The transporting device of the present invention comprises a driving roller 1 rotated by a driving source (not shown) and a driven roller 3 which is rotated by being pressed against the driving roller 1 by a spring 2 and which is driven by a rotary shaft of the driven roller 3. A rear end pressing member 4 is rotatably fitted in the 3a.

The trailing edge pressing member 4 projects toward the drive roller 1 side from the outer periphery of the coaxial driven roller 3 and the leading edge of the sheet P, which is a sheet-like conveyed product, abuts and is pressed by the leading edge of the sheet P. A lever portion 4a, which is a projection portion that presses the rear end of the sheet P that has been rotated and conveyed before, is formed.
A weight portion 4b is formed on the opposite side of the rotation axis 3a of the a so that the lever portion 4a is always positioned above, that is, on the drive roller 1 side by its own weight, and is conveyed to the driven roller 3 side of the lever portion 4a. The trailing edge pressing member 4 that abuts the paper P that is
A disk portion 4c for forcibly rotating is provided.

A non-conveying surface 4d having a diameter much smaller than that of the driven roller 3 and not contacting the paper P is provided on the disk portion 4c.
And the paper P with a diameter slightly smaller than the diameter of the driven roller 3.
And a conveying surface 4e that abuts on the sheet P and rotates the trailing edge pressing member 4 by the conveying force of the sheet P.

A photointerrupter 5 which is a paper detection switch for detecting the paper P is provided in the vicinity of the rear end pressing member 4, and an operation lever 6 for blocking the light of the photointerrupter 5 and turning the photointerrupter 5 on and off. Is provided.

The operation lever 6 has one end serving as a light-shielding portion that blocks light from the photointerrupter 5 and the other end serving as a contact portion that abuts on the weight portion 4b of the rear end pressing member 4 to swing the operation lever 6. There is.

The protrusion 4a of the rear end pressing member 4 is shown in FIG.
, The driven roller 3 coaxial with the rear end pressing member 4
Distance x (for example, 5 m from the end of the driving roller 1 facing the
m) are provided separately.

The operation of the transporting device having the above-mentioned structure will be described with reference to FIG. 4. First, as shown in FIG. 4A, in the state before the leading edge of the paper P enters between the drive roller 1 and the driven roller 3. If so, the protrusion 4a of the trailing end pressing member 4 is located on the drive roller 1 side due to the weight of the weight portion 4b, that is, the non-conveying surface 4d of the disk portion 4c of the trailing end pressing member 4 serves as the driving roller 1. They are opposed to each other, and the trailing end pressing member 4 is not rotated by the rotation of the driving roller 1.

As shown in FIG. 4B, when the leading edge of the paper P enters between the drive roller 1 and the driven roller 3, the paper P
The front end of the rear end pressing member 4 abuts on the protruding portion 4a of the rear end pressing member 4 and presses the protruding portion 4a in the conveyance direction of the paper P to rotate the rear end pressing member 4.

When the trailing end pressing member 4 rotates, the transport surface 4e of the disk portion 4c rotates to the drive roller 1 side, and the transport surface 4e comes into contact with the paper P (the transport surface 4c and the drive roller 1 form the paper. (P is sandwiched), and the disc portion 4c (rear end pressing member 4) rotates following the conveyance direction of the paper P, and the weight portion 4
b contacts the other end of the operating lever 6, and the operating lever 6 swings so that one end of the operating lever 6 moves to a position where the light of the photointerrupter 5 is blocked, as shown in FIG. It is detected that the paper P has entered between the driving roller 1 and the driven roller 3 by blocking the light of the photo interrupter 5 by 6.

Thereafter, as the paper P is conveyed, as shown in FIG. 4D, the non-conveying surface 4d of the disk portion 4c is driven by the drive roller 1.
When the rear end pressing member 4 is rotated to a position facing the driving roller 1, the trailing end pressing member 4 tries to come to a position facing the driving roller 1 as shown in FIG. Since the trailing edge of paper P has not yet passed, paper P
The projection 4a comes into contact with the surface of the rear end pressing member 4 and
Since it is loosely fitted in a, rotation is blocked by the paper P,
The state shown in FIG. 4D remains until the trailing edge of the sheet P passes.

At this time, the contact between the weight portion 4b of the rear end pressing member 4 and the other end of the operating lever 6 is released, and the operating lever 6 returns to the initial position as shown in FIG. 4 (a). The light blocking of the photo interrupter 5 is released.

When the trailing edge of the sheet P passes through the position of the protrusion 4a , the trailing edge pressing member 4 is rotated by the weight of the weight portion 4b as shown in FIG. 4 (e), and the protrusion 4a is driven by the driving roller 1.
Try to be positioned to face .

The photo interrupter 5 is turned on and off during the forced rotation operation of the rear end pressing member 4 from the above-mentioned FIGS. 4 (c) to 4 (d), and this photo interrupter is P-ou.
Used as a t-sensor.

When the next sheet of paper P enters between the drive roller 1 and the driven roller 3, the trailing edge pressing member 4 rotates again as shown in FIG. 4B , but prior to this. ,
The trailing edge of the sheet P that has been conveyed immediately before is set to the trailing edge pressing member 4
The protrusion 4a of the
Pressed by moving the the paper P downward, the conveyance is the paper P, already been discharged onto the sheet P being discharged is conveyed on the tray, to discharge the sheet P to the conveyance order on the tray Build up.

When the rear end pressing member 4 is rotated from FIG. 4D to FIG. 4E, the weight portion 4 of the rear end pressing member 4 is rotated.
Since it is rotated by the posture return force due to the weight of b,
During this rotation, a sufficient rotational force for operating the operation lever 6 cannot be obtained, so that the operation lever 6 is operated while the rear end pressing member 4 is rotating by the transport surface 4e of the disk portion 4c of the rear end pressing member 4. It is arranged to operate. Such an arrangement, it is possible to obtain a sufficient rotational force for operating the operation lever 6, it is possible to reliable operation of the operating lever 6.

The radius of the conveying surface 4e of the disk portion 4c is 6 mm + 0, which is the radius of the driven roller 3 coaxially supported.
It is set to 5.95 mm or less for ~ -0.05. By setting in this way, it is possible to prevent one-sided contact (uneven contact) of the driven roller 3 with the drive roller 1,
A sufficient carrying force of the driving roller 1 and uniform carrying performance can be obtained. At this time, if the radius of the transport surface 4e of the disk portion 4c is 5.9 mm or more, a sufficient forced rotating force can be obtained.

Then, as shown in FIG. 3, the rear end pressing member 4
Distance x (5 m from the end of the drive roller 1)
m) Since they are arranged apart from each other, when the paper jam occurs, the paper P is pulled and the rear end pressing member 4 is forcedly rotated beyond the position shown in FIG. 4D. Even if there is, since the protrusion 4 is separated from the drive roller 1 by the distance x, the protrusion P does not pierce the paper P and pierce the paper P when the paper P bends as shown in FIG. .

A second embodiment of the carrying device of the present invention will be described with reference to FIG.

In the second embodiment of the conveying device of the present invention, the driven roller gear 7 is formed at one end of the driven roller 3 and the disk portion 4 of the first embodiment is provided on the trailing end pressing member 4 on the driven roller 3 side.
The pressing member gear 8 is formed in place of the driven roller gear 7
Also, a transmission gear 9 is arranged to face both the pressing member gear 8 and mesh with both gears 7 and 8 to transmit the rotation of the driven roller 3 to the rear end pressing member 4.

The pressing member gear 8 of the rear end pressing member 4 is
The transmission gear 9 has a gear portion 8a having teeth that mesh with each other, and the transmission gear 9 has a non-meshing portion 8b that does not mesh, and the gear portion 8a corresponds to the rear end pressing member 4 of the first embodiment. Transport surface 4
It has a function similar to that of e, and the non-toothed portion 8b is the same as in
It has the same function as the non-conveying surface 4d. The driven roller 3 has a diameter of 12 mm, and the driven roller gear 7 has a tooth tip diameter of 9 mm.
mm, and the pressing member gear 8 is formed to have a tip circle diameter of 9 mm.

When the driven roller 3 is driven and rotated by the driving roller 1, the transmission gear 9 meshed with the driven roller gear 7 of the driven roller 3 is rotated. After that, when the paper P enters between the drive roller 1 and the driven roller 3, when the leading end of the paper P contacts and presses the protrusion 4a of the trailing end pressing member 4, the trailing end pressing member 4 rotates and the transmission gear The gear portion 8a of the pressing member gear 8 rotates toward the facing portion of the gear 9, the gear portion 8a meshes with the transmission gear 9, and the rotation of the driven roller gear 7 is transmitted to the pressing member gear 8 via the transmission gear 9. Transmitted,
The rear end pressing member 4 performs the forced rotation operation.

In the above structure, for example, the paper P is formed after the protruding portion 4a of the trailing end pressing member 4 is at the position as shown in FIG.
If a paper jam occurs during the transportation of the sheet P, the trailing edge pressing member 4 is pulled to the position shown in FIG.
Although the rotation should stop at (d), even when the paper P is pulled out obliquely downward in the transport direction, the tip end circle diameter of the pressing member gear 8 of the trailing end pressing member 4 is the driven roller. Since it is formed to be considerably smaller than the diameter of 3,
The sheet P does not come into contact with the pressing member gear 8 to give a rotational force to the trailing edge pressing member 4, and the protrusion 4a of the trailing edge pressing member 4 does not break through the sheet P.

A third embodiment of the carrying device of the present invention will be described with reference to FIG.

In the third embodiment of the conveying device of the present invention, the notch 10 is formed in the base portion of the rear end pressing member 4 on the side opposite to the driven roller 3 of the protrusion 4a, and the protrusion 4a is made of an elastic material such as rubber. It is formed of a member having.

Therefore, when the paper jam occurs and the paper P is pulled out, even if the paper P comes into contact with the projection 4a, this contact force causes the projection 4a to be the notch 10 and is in the state of the broken line shown in FIG. 6 (a). Therefore, the protrusion 4a does not break through the sheet P. At this time, since the paper P does not bend, the paper P is not habited or scratched.

Further, the notch 10 is not provided in the protrusion 4a, and the thickness of the protrusion 4a orthogonal to the sheet conveying direction is formed thin.
By forming the protrusion 4a with an elastic member, the protrusion 4a may be formed to incline in a direction orthogonal to the transport direction by utilizing elasticity.

A fourth embodiment of the carrying device of the present invention will be described with reference to FIG.

In the fourth embodiment of the conveying device of the present invention, the outer peripheral surface of the rear end pressing member 4 is corrugated in order to prevent the rear end pressing member 4 from rotating in the direction opposite to the conveying direction. The engaging portion 11 is provided, and the engaging lever 13 that is constantly urged toward the engaging portion 11 side by the spring 12 that engages with the engaging portion 11.

In the above structure, when the rear end pressing member 4 is rotating in the carrying direction, the engaging lever 13 moves the engaging portion 1
1 is slid on the inclined surface to get over the engaging portion 11,
The rear end pressing member 4 rotates in the transport direction without engaging 1 with the engaging lever 13.

When the paper P due to the paper jam is pulled out in the direction opposite to the carrying direction, the trailing end pressing member 4 tries to rotate in the direction opposite to the carrying direction by the paper P, but the engaging lever 13 is engaged. Since the rear end pressing member 4 is prevented from rotating in the reverse direction because it engages with the portion 11, the projection portion 4 is attached to the paper P.
a does not stick.

A fifth embodiment of the carrying device of the present invention will be described with reference to FIG.

In the fifth embodiment of the carrying apparatus of the present invention, the operating lever 6 of the photo interrupter 5 is biased by the spring 14 so as to be positioned at the initial position where the light of the photo interrupter 5 is not blocked.

Therefore, when the paper jam occurs and the paper P is pulled out in the direction opposite to the conveying direction, the trailing end pressing member 4 rotates in the reverse direction to the biased position by the spring 14 of the operating lever 6. As a result, the movement of the operation lever 6 is prevented, so that the reverse rotation of the rear end pressing member 4 is also prevented at this position, and the anti-damage of the paper P due to the reverse rotation is prevented.

A sixth embodiment of the carrying device of the present invention will be described with reference to FIGS. 9 and 10.

In the sixth embodiment of the conveying device of the present invention, as shown in FIG. 9, the rear end pressing member 4 is rotatably loosely fitted to the rotary shaft of the drive roller 1 side, and the projection 15 is on the driven roller side. A notch 15a is formed at the tip of the protrusion 15 so that the rear end of the paper P is hooked.

A stopper 17 with which the leading end of the paper P contacts the leading end of the tray 16 on which the paper P is conveyed and discharged is provided. The stopper 17 is provided so as to be movable with respect to the transport direction, and the stopper 17 is moved to move a distance y from the drive roller 1 and the driven roller 3 of the tray 16 to the stopper 17 and the length of the sheet P transported in the transport direction. Set to the same length as.

By doing so, the driving roller 1
And the paper P that is conveyed and ejected by being sandwiched by the driven roller 3
Its front end abuts against the stopper 17, the trailing edge of the sheet P as shown in FIG. 9 positioned near the driving roller 1 and driven roller 3.

Then, when the next sheet P is conveyed and the trailing edge pressing member 4 rotates, the trailing edge of the sheet P previously conveyed is caught in the notch 15a of the protrusion 15 and is lifted upward,
The conveyed paper P is inserted under the previously conveyed paper P, and the tray 1 is not changed in the stacking order of the paper P.
6 can be deposited.

[0069]

Effects of the Invention] According to the transport apparatus of claim 1, wherein, by pressing the rear end of the sheet conveyed that has been transferred earlier in the protrusion of the rear end pressing member, the conveyance of the sheet over preparative shaped transport material It is possible to accurately accumulate the conveyed sheet-shaped conveyed objects on the conveyed object accumulation tray in the conveying order without causing clogging. Further, the rear end pressing member can be formed coaxially with the rotation shaft of the driving roller or the driven roller,
It is possible to reduce the size of the device.

[0070]

According to the conveying device of the second aspect , since the diameter of the disk portion is made slightly smaller than the diameter of the coaxial roller, the disk portion does not contact the other roller,
The drive roller and the driven roller can be brought into contact with each other uniformly, the sheet-like conveyed object can be surely conveyed, and the conveying clogging due to the oblique feeding of the sheet-like conveyed object can be surely prevented.

[0072]

According to the third aspect of the present invention, the switch operating means for operating the conveyed object detection switch is operated when the rear end pressing member is forcedly rotated by the action of the conveying surface of the disk portion. It is possible to obtain a sufficient operation force for operating the, and it is possible to reliably operate the conveyed object detection switch and prevent erroneous detection.

According to the conveying device of the fourth aspect , when the sheet-shaped conveyed product is pulled out, the protrusion is provided at a position separated by 5 mm or more from the other roller, so that the sheet-shaped conveyed product is bent. It is possible to prevent damage due to the protrusion of the conveyed object.

According to the conveying apparatus of the fifth aspect, when a force larger than the conveying force is applied to the protrusion when pulling out the sheet-shaped conveyed product, the protrusion is tilted. It is possible to prevent damage.

According to the sixth aspect of the present invention, since the rear end pressing member is prevented from rotating in the opposite direction to the conveying direction, the sheet-like conveyed object is moved in the opposite direction to the conveying direction when the conveyance jam occurs. Since the trailing end pressing member does not rotate in the reverse direction even when pulled out, it is possible to prevent damage to the sheet-like conveyed product due to the protrusion.

According to the transporting device of the seventh aspect , since the catching portion for hooking the rear end of the sheet-like conveyed product is formed on the protrusion, the rear end of the previously conveyed sheet-like conveyed product is surely secured. It is possible to press, and sheet-like conveyed materials can be sequentially and accurately deposited.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a carrying device of the present invention.

2A is a front view of a rear end pressing member, and FIG. 2B is a side view of the rear end pressing member.

FIG. 3 is a front view of FIG.

FIG. 4 is an explanatory diagram illustrating an operation of the first exemplary embodiment of the transport device of the present invention.

FIG. 5 shows a second embodiment of the transport device of the present invention, (a)
Is a top view thereof, and (b) is a side view thereof.

FIG. 6 shows Embodiment 3 of the carrying device of the present invention, (a)
Is a front view thereof, and (b) is a side view thereof.

FIG. 7 shows Embodiment 4 of the carrying device of the present invention, (a)
Is a front view thereof, and (b) is a side view thereof.

FIG. 8 shows Embodiment 5 of the transport device of the present invention, (a)
Is a top view thereof, and (b) is a side view thereof.

FIG. 9 shows Embodiment 6 of the transporting device of the present invention, (a)
Is a left side view thereof, (b) is a front view thereof, and (c) is a right side view thereof.

FIG. 10 is a side view including a tray according to the sixth exemplary embodiment of the transport device of the present invention.

FIG. 11 is a conventional example 1 of a scanner using a conventional transport device.
FIG.

12 is a cross-sectional view of FIG.

FIG. 13 is an explanatory diagram showing a conveyance state of the paper in FIG.

FIG. 14 is an explanatory diagram showing a paper jam state in FIG. 11.

FIG. 15 is a second conventional example of a scanner using a conventional transport device.
3A is a sectional view thereof, and FIG. 3B is a front view of the paper discharge roller.

[Explanation of symbols]

1 drive roller 2 spring 3 Driven roller 4 Rear end pressing member 4a protrusion 4b weight section 4c Disk part 4d Non-transport surface 4e Transport surface

Claims (7)

(57) [Claims] 1. A conveying device for sandwiching a sheet-like conveyed product by a driving roller rotated by a driving source and a driven roller which is pressed against the driving roller and is driven to rotate, and discharges the sheet-like conveyed product to a conveyed product accumulation tray. In the above, in either one of the drive roller and the driven roller, the rotary shaft is rotatably loosely fitted, and the projection portion is provided at one end and the projection portion.
On the opposite side of the axis of rotation of the
Was closed and a weight portion to be location, Bei the rear end pressing member
For example, the protrusions than the outer periphery of the rear end pressing member coaxial with the roller, is formed by projecting the other roller side, the rear end pressing member is much smaller than the rear end pressing member coaxial with the roller In diameter,
The non-conveying surface that does not contact the sheet-shaped conveyed object and the non-conveying surface that contacts the sheet-shaped conveyed object
A conveying surface for the rear end pressing member rotates Ri is, has a formed disk portion, the sheet conveying object is conveyed, the leading end of the sheet conveyed will abut on the protruding portion , Carrying the above-mentioned protrusion in sheet form
When the trailing end pressing member is rotated to press in the conveying direction of the sent article , and when the trailing end pressing member is rotated, the conveying surface is moved.
The sheet-like conveyed object comes into contact with the conveyed sheet-like conveyed object.
The trailing end pressing member is rotated following the conveyance of
Ri, and the sheet-like conveyed the non-conveying surface is conveyed paired
When it comes to the facing position, the protrusion is brought into contact with the lower surface of the conveyed sheet-like conveyed product, so that the rear end pressing member is pushed.
Rotation is prevented, and then the rear end of the conveyed sheet-like conveyed material is, the
When passing through the position of the protrusion , the rear end pressing member
Transport apparatus to rotate by the weight of the weight portion, the rear end of the conveyed sheet-like conveyed material, pressed by the protrusion rotates, characterized in that the kick to the conveyed stacking tray. 2. The conveying device according to claim 1 , wherein the diameter of the disc portion on the conveying surface is made slightly smaller than the diameter of the roller coaxial with the rear end pressing member. 3. A conveyed object detecting switch for detecting the sheet conveyed object is provided, and when the rear end pressing member is forcedly rotated by the disk portion, the conveyed object detecting switch is opened / closed in conjunction with the rear end pressing member. claim, characterized in that a switch operating means 1
The transport device described. 4. The conveying device according to claim 1, wherein the protrusion of the rear end pressing member is provided at a position separated from the other roller by 5 mm or more. 5. The projection of the rear end pressing member is formed so as to be tilted when a force larger than the carrying force of the sheet-like conveyed product is applied to the projection. Transport device. 6. The conveying apparatus according to claim 1, further comprising a reverse rotation preventing means for preventing the rear end pressing member from rotating in a direction opposite to the conveying direction of the sheet-shaped conveyed product. 7. The conveying device according to claim 1, wherein a hooking portion for hooking a rear end of the sheet-shaped conveyed product is provided on the protrusion of the rear end pressing member.