JPS61166452A - Original-copy feeding device in copying machine - Google Patents

Abstract

PURPOSE:To facilitate correction and prevent an original copy from being sent onto a plater glass without being perfactly corrected, by releasing the presscontact of a transport roller during the correction for the skew feed by a gate and a paddle for correction. CONSTITUTION:The correction for skew feed of an original copy 11 is controlled by a microcomputer. At first, the original copy 11 is transported by the drive of a transporting roller 9, and the original copy 11 is detected by a transmission type photosensor 12, and a correcting paddle 7 is driven. Further, the transporting roller 9 which nips the original copy 11 in coperation with a pinch roller 10 is shifted upwardly, and the original copy 11 is released, and the lapse of time of about 600 m.sec is awaited. During this time, the original copy 11 is provided with a leftward force on the upper surface by the turning drive of the correcting paddle 7, and the skew feed is corrected so that the top edge of the original copy 11 is set along a gate 5. Then, the gate 5 is opened, and a platen belt 3 is driven, and the original copy 11 is transported onto a platen glass 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for correcting skew feeding of a document in a document feeder of a copying machine.

[An outline of the document feed RFt in which the correction mechanism corrects the skew feeding of the document sent by the double-sided document conveyance roller will be explained based on FIGS. 2 and 3.

In both figures, 2 is the bushing glass on the copying machine main body side.
Above it, a platen belt 3 is connected to a pair of platen belts [
1-La 4, and on the right side there is a gate 5 that can move up and down.
is located, and a pair of front and rear correction paddles 7 that are integrally fitted to the rotating shaft 6 supported in the front-rear direction are disposed to the right thereof, and further to the right of the rotating shaft 6 are arranged A conveyance roller 9 is fitted onto a rotating shaft 8 supported in parallel, and a pinch [1-ra 10 is pressed from above to the upper part]
I'm here.

Therefore, the document 11 that has been conveyed leftward while being sandwiched between the conveyance roller 9 and the pinch roller 10 reaches the gate 5 under the conveyance force of the correction paddle 7 .

Here, the replenishing paddle 7 has a brush-like tip and has a small coefficient of friction, so it does not have a conveying force exceeding a certain limit, so the document 11
If the document 11 is being fed diagonally as shown in FIG. Only the correction paddle 7 on the side transports the original, and the oblique feeding of the original is corrected so that one side of the original 11 runs parallel to the gate 5.

With the skew feeding corrected in this manner, the gate 5 opens and the conveyance of the original WA 11 is taken over by the platen belt 3, and the platen of the original 11 is set at a predetermined position on the lath 2.

After exposure, the platen belt 3 transports the film.

Conventionally, even when the correction paddle 7 is correcting the skew feed of the original 11, the conveying roller 9 is in pressure contact with the original 11 at the rear end of the original 11, which hinders the correction work and takes a considerable amount of time for correction. There are disadvantages in that it takes time and that the platen is sent to the lath 2 without sufficient correction, resulting in copying errors.

The present invention has been made in view of the above, and an object of the present invention is to provide a document feeding device in which the correction is facilitated by releasing the pressure contact of the conveying roller 9 during skew feed correction using the correction paddle 7. It is in.

The structure of the present invention will be explained based on FIG. 1.

In the document feeder of a multi-function machine, in which the skew feeding of the document C that was sent by the document conveyance roller A is corrected by the correction mechanism B, D is a detection device that detects that the document C has reached the position of the auxiliary E mechanism B. There are 3 steps.

E is a control stage 111, which controls the engagement and release of the document L4 by the document conveying roller based on the information from the detection means.

Reference numeral F denotes a-l position moving means, which moves the position of the document conveyance roller based on the control by the above-mentioned control means E.

According to the present invention, based on the above-described configuration, the correction mechanism B adjusts the n
- It is possible to release the pressure contact of the document C by driving the position moving means F, thereby facilitating correction of the skew feeding of the document C.

Hereinafter, embodiments according to the present invention illustrated in FIG. 4 and subsequent figures will be described.

Figure 4 shows the IP of this example! This is a side sectional view of the document feeding device @1, in which a platen has a lath 2, a platen belt 3, a gate 5, a correction paddle 7, a conveyance roller 9, and a pinch roller 10 are arranged as shown in the conventional example.

In this embodiment, a pair of upper and lower transmission photosensors 12 are provided at approximately the same position as the correction paddle 7.
The roller 9 is equipped with a rotary drive fl+ device 20 and a roller moving device 21 that moves the conveying roller 9 away from the pinch roller 10.

These devices in the conveyance roller 9 will be explained based on FIGS. 5 and 6.

The rotary shaft 8, which is integral with the pair of front and rear transport rows 59, is pivotally connected to a box-shaped bracket 22 at its center, and a gear 23 is fitted integrally with the rotary shaft 8 inside the bracket. The gear 24 engages with the platen 1-
22 with a support shaft 25, and a gear 27 fitted to the tip of a drive shaft of a motor 26 fixed to the rear side of the bracket 22 meshes with the gear 24.

Therefore, the clockwise rotational drive of the motor 26 causes the gear 23 to be rotated at a reduced speed via the gear 24, and together with this, the conveying roller 9 is rotated in the 51st direction. Original 11 is transported.

All of the rotational drive devices for the conveyance roller 9 are mounted on the bracket 2.
2, and the bracket 22 itself is pivotally connected at its left end to a support member 30 that protrudes upward from the bottom surface of the casing 1a of the document feeder 1 with a support shaft 31.

Therefore, the left side of the bracket 22 is pivotally supported by the support member 30, and the right side is supported by the document feeding device 1 in such a manner that the conveyance roller 9 is joined to the pinch roller 10.

A U-shaped protrusion 22a that protrudes upward and has a middle groove on the left side is provided on the rear side of the box-shaped bracket 22.

A support portion @ provided at the rear of the bracket 22 and protruding from the bottom surface of the casing 1a of the document feeder 1 in the direction F
A link 34 is pivotally attached to the link 32 with a support shaft 33 provided so as to be oriented in the front and rear directions, and an arm 34a extends rightward from the pivot portion, and an arm 34a is provided at the tip of the arm 34a. The bottle 35 is attached to the U-shaped protrusion 22a of the bracket 22.
It fits into the middle groove of the

Further, in the link 34, another arm part 34b extends downward from the pivot part behind the arm part 34a, and the tip end of the arm part 34b is moved from side to side of a solenoid 36 fixed behind the platens 1 to 22. It is pivotally connected to the plunger 37.

Therefore, the solenoid 36 is activated and the plunger 37
When the link 34 is pulled to the right, the link 34 is rotated counterclockwise around the support shaft 33, and the arm portion 34a is rotated upward together with the pin 35, so that the bracket 22 is moved toward the protrusion 22.
The transport roller 9 receives an upward force from a and is lifted upward about the support shaft 31, so that the conveyance roller 9 separates from the pinch roller 10 and can release the pinch () of the original [11].

When the drive of the solenoid 36 is released, the bracket 22 is lowered by the movement of the provided motor 26, etc., and the conveying roller 9 is supported in contact with the pinch roller 10, so that the document 11 can be conveyed.

Note that the gate 5 is connected to the upper part by a solenoid (not shown).
- The correction paddle 7 is also rotated clockwise by another rotor (not shown).

The control of the skew feeding compensation 1 of the sent original 11 is performed by the micro unit 1-1, and the movement and order of the originals 11 are set to the format 1~ shown in Fig. 7. explain.

First, the original 11 is transported by the transport [1-ra 9 is driven (to step)], and when the original 11 is detected by the transmissive photosensor 12 (step q)), the correction paddle 7 is driven. (Step ■), the solenoid 36 is further turned on (Step ■), and the conveyor 1-ra 9 that was pinching the original 11 between the pinch roller 10 is moved upward to release the original 11. It has a time lapse of about 600 m sec (step ■).

During this time, the original 11 receives a force to the left on the upper surface of the original due to the rotational drive of the correction paddle 7, and the diagonal feeding of the original 11 is compensated for so that the leading edge of the original 11 aligns with the gate 5.

The time of 600TrLsec is sufficient time to complete the correction of the skew feed, so after this time has elapsed, the gooses 1-5 are opened in the corrected state (step ■), and at the same time, the conduction of the solenoid 36 is released. (Step), the platen belt 3 is further driven (Step ■), and the original 11
is sent between the platen belt 3 and the platen glass 2,
It is carried by the platen belt 3 over the platen glass 2 to a predetermined position and used for copying.

The correction paddle 7 is stopped after a predetermined time (step 2), the gate 5 is closed (step [phase]), and the oblique feed correction process is completed.

As described above, during the skew feed correction using the gate 5 and the correction paddle 7, the conveyance roller 9 is raised upward and the document 11 is released, thereby making the correction easier and making it possible to always complete the correction within a certain period of time. .

Although the control system in this embodiment was controlled by a microcomputer, control by a logic circuit is also possible.

LE Group 51 Section The present invention uses skew feed compensation iL +'; i In an original feeder that has document transport rollers in front of the horizontal side -C During skew feed correction, the document is released from the document transport 11 - roller and corrected. This makes it possible to prevent the correction from taking a long time or from sending the original to the platen glass without being completely corrected, allowing for smooth and accurate copying work. .

[Brief explanation of the drawing]

FIG. 1 is a view corresponding to the claims of the present invention, FIG. 2 is a schematic side view of the original document feeder according to iW from 1, FIG. 3 is a plan view thereof, and FIG.
The figure is a schematic side view of a document feeding device according to an embodiment of the present invention;
FIG. 5 is a plan view of the peripheral equipment of the conveyor 11-shi of this embodiment;
FIG. 6 is a side view thereof, and FIG. 7 is a flowchart showing the operating procedure of the control system of this embodiment. 1... Document feeder, 2... Platen glass, 3...
... Graten bell +-14... Platen belt roller, 5... Goo 1~. 6... Rotation axis, 7... Correction paddle, 8... Rotation axis, 9... Conveyance [1-ra, 10
... Pinch roller, 11... Original, 12... Transparent!
X+1. Fo 1 - Len (No, 20... Rotation drive device, 21... Roller moving device, 22... Bracket 1~
．． 23.24...Gear, 25...Spindle, 26...
Motor, 27... Gear, 30... Support member, 31... Support shaft, 32... Support member, 33... Support shaft, 34... Link, 35...
Pin, 36... Solenoid, 37... Plunger.

Claims (1)

[Claims] In a document feeder of a copying machine, which uses a correction mechanism to correct skewed feeding of a document fed by a document conveyance roller,
A detection means for detecting that the original has reached the correction mechanism position; a control means for controlling the pressing and release of the original by the original transport roller based on information from the detection means; 1. A document feeding device for a copying machine, comprising: roller position moving means for moving the position of a conveying roller.