JPS60188247A - Automatic paper feed device - Google Patents

Abstract

PURPOSE:To make it possible to surely carry out paper feed, by additionally providing a retractable feed roller for feeding papers on a paper setting surface, upstream of a feed roller in cooperation with a reverse roller having such a function that papers are sorted one by one and fed. CONSTITUTION:In such a condition that an auxiliary paper feed roller 15 is lowered separated from a pinch roller 23, when an original copy is set on an original copy setting surface 24 and a start button is depressed, a motor 14 rotates a shaft 13 in the direction of the arrow 30. This rotation is transmitted to the auxiliary paper feed roller 16 through a resilient belt 18 which produces a force for raising the auxiliary paper feed roller 16 that is therefore made into press- contact with the pinch roller 22 with the original copy being held therebetween. Simultaneously, a paper feed roller 12a is rotated in the same direction while a reverse roller 1a which is made in press-contact with the roller 12a is rotated in the reverse direction, thereby original copies which is fed by means of the auxiliary paper feed roller 16 are sorted one by one and are fed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic paper feeding device for feeding a plurality of originals stacked on a document table one by one into the main body of a copying machine, a facsimile machine, etc. .

In the conventional example (1) and its problems, as an automatic paper feeding device installed in a Noah's printer, a reversing roller is provided so as to contact the paper feeding roller with its own weight, and this reversing roller is used as a dork limiter. The torque is configured to drive the paper feed roller in the opposite direction (/?C rotation 1 through 1 stages) and to discriminate and feed the original documents set on the document table one by one. ') The Mino-T method is popular.

However, in such a conventional automatic paper feeder, if the paper is set in such a way that the tip of the original paper does not reach the paper feed roller, the paper cannot be fed. , :'s Seno [・ was α■11 reached. It's a flower, even if you write the manuscript correctly, the manuscript table and Le'! 1l
-1゛1 Due to the frictional force and static 7a force, the 2nd sheet and earlier:
There is a problem that the original 4'ltM does not reach the paper feed roller and the automatic paper feed operation stops midway]

OBJECTS OF THE INVENTION The present invention solves the problems of the conventional technology, and provides a paper that is easy to set, and can reliably print sheets of paper that have been set, 7+, or Simple device configuration
``1 automatic paper feeder 4jaIJ'' is defined as LI.

Am construction of the invention In addition to the paper feed roller that cooperates with the reversing roller, the present invention provides a feeder A1 (roller) for transferring the paper to the paper feed roller to improve the paper placement. This makes it possible to feed paper and make it easier to set paper.

Unfortunately, the present invention simplifies the device and reduces costs.
・In order to make a circle, the rotational force of the paper feed roller that works with the reverse roll is increased by 41JJII, and the rotation of the J-boarding roller is increased by 41JJII.
l)、、、とが1i：jをイ」wa Moetsu.

Embodiment 1'/Explanation of IJ From now on, an embodiment of the present invention will be explained based on the drawings.

1 and 2 are partially omitted schematic side views of an automatic paper feeder according to an embodiment of the present invention, respectively;
Figure 1 shows the automatic paper feeder in a non-operating state;
The figure shows the operating state of the automatic paper feeder. Figure 3 shows the paper feed roller and sleeve of the automatic paper feeder.

FIG. 4 is a partially omitted schematic plan view showing a supplementary paper roller and the like, and FIG. 4 is a partially omitted schematic plan view showing a reversing roller and its drive system of the automatic paper feeder. Figure 5 is v of Figure 4.
-V' line sectional view.

In each figure, the reversing rollers 1a and 1b are loosely inserted into the shaft 3 through sleeves 2a and 2b made of Duracon, and are supported so as to be rotatable integrally with the sleeves 2a and 2b and movable in the longitudinal direction of the shaft 3. ing. For both end notes 15 of 1111I3, there is a 42L phenol one-sided board.

4b is fixedly installed, and further outside it is a goo ') s '
+5b is fixed. Also, the shaft 3 has a sleeve 2a.
.
L.

2b together with the shaft 3 and the peaks of the reversing rollers 1a and 1b] constitute a dowel and gutter means.

Both ends of 'l'l 113 are rotatably and vertically movably held in vertical grooves sa and sb formed in support plates 7a and 7b.

The shaft 9 supported by the support plates 7a and 7b during rotation 1'' has a
Pulley 10! L, 10b is fixed.

Belts 11a, 111) are passed between the pulleys 10a, 10b and the pulleys 5a, 5b. These pulley 6? L, 5b, 10a, 10b and belt 11a, 1
1b constitutes a power transmission system for transmitting the rotational force k+111+3 of 1I11119. Note that the bells 11a and 11b are elastic belts.

Below the reversing rollers 12L and 1b, the paper feed rollers 12&
, 12b are provided. This paper feed roller 12fL
, 12b are fixedly attached to the support plate 13 ((1, support plate sa
, sb are rotatably supported. This IQl113
and 11119 rotation of motor 14 lll1l115
The belt 16 is attached (see Figure 1).
, motor 14 (L-i/[to move], :1
llI9 and 13 are driven simultaneously by 1v.

An auxiliary paper feed roller 16 is provided in front of the paper feed rollers 122L and 12b.
Between the pulley 17 fixed to 3, the bullet 111 bell 1 18
4.1 I'm embarrassed. 19a and 19b are Q! of the auxiliary paper feed roller 16. There are guide rods that guide both ends of 1lI20, n1llll 2 Q is the guide rod 19zL, 1g
If it rotates while being guided by the guide surfaces 21 & 21 b of b, the downward movement by 1" is +J function. A pinch roller 22 is provided below the auxiliary paper feed roller 16.

The shaft 23 of this pinch roller 22 is supported &7a.

It is rotatably supported by 7b.

Reference numeral 24 denotes a document table, the tip of which is a paper feed roller 12 & .
12b is terminated in front of ``=''. Good luck, manuscript table 24
A notch 25 is provided in the portion corresponding to the auxiliary paper feed roller 16.
is formed.

In this embodiment, the elastic belt 18 is brought into contact with the pinch roller 23 after the auxiliary paper feed roller 16 is folded, but the length of the elastic belt 18 is 1 m.
Position the auxiliary A6 negative roller 16 inside the person, and directly connect the auxiliary paper feed roller 16 *+fI to the pinch roller 2.
3 may be brought into contact with and stirred.

The operation of the automatic paper feeder configured as above will be explained below.

=j1 In the operating state, the CJ1 sleeve support roller 16 is 15,011 as shown in FIG. 1, and is between the pinch roller 23 and f'ilf. In this state,
"One sheet" or "multiple sheets of originals] 1", j are set on the 1"4 machine 24. In this case, the ends of the originals 4't', 4'J1. are paper feed rollers 12a.

12b, at least all the originals 1"1.
The tip of paper feed roller 12a is lower than the pinch roller 23.
, 12b A rule and A11. 29(l(2IJ)
ij a'i, if set deviation rj, good. shi/kogatte, original A'i:+'s ce, 1・(r, the easiest.

In this way, 1 is also 1.4'f; After f is set to 1, press the start button (1-1-J, no), and morph 1.
4 is activated, and 弄 13 is rotated in the direction of arrow 30. This I 130 times ijj: Power (r, 1 bullet n2+
The auxiliary paper feed is transmitted via the belt 18 to the roller 16.
, the auxiliary paper feed roller 16 rotates in the direction of the arrow i1'3. At this time, the rational belt 18 generates a force that rubs the auxiliary path A roller 16 (Ji), and due to the collision between the shredded spider 120 and the guide surfaces 21a and 21b, A force is generated to make one thorn of the cola 16. Due to this force, the cola 16 is guided by the guide surfaces 211L and 2jbK, and gradually rotates in the direction of the arrow 31. Finally, it rises at the position shown in FIG. The original i'ia+ is fed in the paper feeding direction indicated by 32, and the tip of the original i'ia+ comes into contact with the paper feed rollers 12a and 12b.
1! l! do.

Note that the pinching force of the document between the auxiliary paper feed roller 16 and the pinch roller 22 is relatively weak, so when the leading edge of the document contacts the paper feed rollers 122L and 12b, the auxiliary paper feed roller 16 (91 belt 18) spins idly. Therefore, the leading edge of the original is the auxiliary paper feed roller 122L.

12b, there is no need to worry about the original being bent to the extent that it becomes a problem.

As described above, the auxiliary paper feed roller 16 and the pinch roller 22
gives bj's iK, WtO-ra 12a, 12b
Since 4 times are sent to one rule, there is no need to worry about the 11δ operation force or YrJ' % force between Hara] Taka and Hara Fukada 24 interfering with the delivery of Akakuchi.

Due to the action of the auxiliary paper feed roller 16 and the pinch roller 22, the paper feed roller 4'D'F+ is fed by the paper feed roller 12a.

12 b: l', -J: HiJiro 'l'J, D-La 1a
, 1b, the paper is fed by discriminating one sheet from the other.This operation will be explained below.

When the morph 14 operates, the paper feed roller 12a.

12b is driven once in the direction of arrow quotient f 30, and
119 is rotated in the direction of the arrow 33. 1 rule 9 times 111L, force is belt 11? L and pulley 52L, sb.

101&, 10b and rotate to the middle 1i13, i'll 3 is the force of the arrow 34 +; This rotational force C1 of 11-113, I of the torque limit means! 14% fq, 1 engaged jψ] Jurisdiction 4
J through 2L, 4b and sleeve 22L, 2'b
Yurika, Laura 1 a, 1. b to i, 1゛[2.

Here, as shown in the second I/l, there is one sheet of paper 21) moss J storage 11f, rollers 1a, 1b and h;
2a.

12t), there is even one intervening claw,! If J is not available, paper feed slot to J12
a.

From 12b” Fire J, Laura 1? L, 1 b (
((7th generation) The torque limit is tightened at 11 times when the torque limit is exceeded.A torque exceeding the torque limit by 1 kB is applied to the torque limit means, and the L/RUC limit means idles, causing the reverse rotation roller to tighten. IN, 1b is paper feed roller 1
22L, according to the 111th time of 1 2b, the arrow iJ3i
2 0 and is rotated in the opposite direction. As a result, the paper 21 interposed between the rollers is transported in the paper feeding direction.

On the other hand, the paper feed rollers 122L, 12b and the reverse rotation roller 12L
, Ib, the rotational force transmitted from the paper ejection rollers 1 2 & , 1 2b to the reversing rollers 6a, 6b is
This is smaller than the +rp +tg force generated in the IMI between L, 4b and sleeves 22L, 2b. In other words, the value of the torque applied to the means becomes smaller than the torque limit value. As a result, the reverse rotation rollers 12L and 1b rotate in the direction of the arrow 34, and the paper feed roller 12a.

Only the bottom paper that comes into contact with 12b is fed in the paper feeding direction,
The remaining claws are sent back by the reverse 11=i D-ra 1a, 1b in the opposite direction to the paper feeding direction.

Now, the paper feed rollers 12a, 12b and the reverse rotation roller 1a. 1
b,l-14 Kakuchu IT' Irt-2r Mon.
-/Bajshihei J-R? ? ．． ! Ji mouth-ra 12a,
The rotational force transmitted from the rollers 12b to the reversing rollers 1a, 1b increases, and conversely, when the contact pressure is small, the transmitted rotational force decreases. Therefore, this contact pressure is the torque limit,
1. This is an important point in setting the value.

FIG. 4 is a diagram showing the relationship between such contact pressure and torque limit value. In this figure, a shaded area C indicates an area where the automatic paper feeder can discriminate and feed sheets one by one. For example, when the contact pressure is constant as indicated by the straight line 23, the range of torque limit values that allows tlL'7:'+1 to 1+paper feeding is A.

On the other hand, in this example, 1illll 3 'tc
17tJa a, B b, supported so as to be movable up and down,
A roaring reversing roller 12L.

The rotational force of the rotation '11119 provided in the first rule in front of 1b is transmitted to the shaft 3 by belts 112L and 11b, and when the reversing force is transmitted, the component force of the transmitted force is applied to the reversing rollers 1a and 1bi paper feeding rollers. 12&, 12b] is applied to the reversing rollers 12L, 1b.

(At t”L, the reverse rotation rollers 1a, *b and the paper feed roller 12
? The contact between L and 12b (1- to 17) is the resultant force of the pressing force due to the component of inertia force and the own weight of the reversing rollers 12L and 1b.The pressing force due to the component of this transmitted force is: The coefficient of kinetic friction increases as the torque limit value increases.Moreover, between the phenol friction plates 4&, 4b'' that constitute the torque limit means and the Duracon sleeves 2a, 2b, the coefficient of dynamic friction increases. The larger the static 1# coefficient of friction is, and the greater the difference in relative rotational speed between the shaft 3 and the reversing rollers 1a, 1b, the greater the frictional force between the friction plates 4?L, 4b and the sleeves 2&, 2b. In the case of the embodiment, the contact pressure il'l is approximately proportional to the torque limit value, as shown by the solid line 41 in FIG.

Therefore, the setting range of the torque limit value that allows normal automatic paper feeding is B, which is clearly wider than range A.
This will make it easier to set the torque limit means.The torque limit value is determined mainly by the repulsion force of Sublinova, but as mentioned above, torque IJ... 1. When the setting range of the value is wide, the nitrification condition of the spring spring 6 is relaxed, and it is possible to achieve regulation.

Incidentally, the more the reversing rollers 1a and 1b are arranged, the easier the torque limit setting becomes.

It is set as above and the final original 41":,i
After feeding the paper, when the operator presses a stop switch (not shown), the motor 14 is operated in the opposite direction for a predetermined period of time and then stopped. Note that this control may be performed based on a detection signal from a sensor that completely detects the presence or absence of a document on the document table 24.

The reverse rotation of the motor 14 causes the shaft 13 to rotate 11 for a short time in the direction opposite to the arrow 30, and as a result, the auxiliary paper feed roller 16 is lowered to the position shown in FIG.

As mentioned above, in the automatic paper feeder according to this embodiment, it is much easier to set a document than in the past, and it is possible to reliably load a document that has been cut down to the last one in a bowl. In addition, the paper feed rollers 12&, 12
In order to rotate and raise/lower the auxiliary paper feeding cola 16 using the rotational power of the auxiliary paper feeding roller 16, one embodiment of the dedicated power source for the auxiliary paper feeding roller 16 has been described above in detail. The embodiment is not limited to the above embodiment.For example, the support plate 7a,
It may be rotatably supported at the tip of a frame member rotatably supported on the 7bi or 13. Similarly, the shafts 3 of the reversing rollers 1a, 1b are connected to the rotating shaft 9 or the support plate 7.
It may be rotatably supported by an arm member rotatably supported by 1L and 7b.

Further, the rotating shaft 9 may be rotationally driven by a motor separate from the motor 14. However, in this case, in addition to the weight of the reversing rollers 1a and 1b, the weight of the paulownia arm is also added to the paper feed rollers 12&, 12b.
It is desirable to make the combined weight Ql as light as possible in order to widen the setting range of the torque limit value.

Now, the rotating shaft 9 is rotated 11 times by the motor 14 and another motor.
((It may be possible to move the motor at -l
/]×7 and A8 Furthermore, in the above embodiment, 42 quality of the Vrcrg friction plates 41L, 4b and sleeves 2a, 2b are selected so that the coefficient of dynamic friction is larger than the coefficient of static friction. It is also possible to change the torque limit value so that it is less than or equal to the static friction coefficient.However, the setting range of the torque limit value is narrower than in the above embodiment.

Effects of the Invention As described in detail above, according to the present invention, it is easy to set a document, and it is possible to reliably feed paper that has been censed to the last sheet. This makes it possible to realize an excellent automatic paper feeding device that is easy to use.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted schematic side view showing an automatic paper feeder according to an embodiment of the present invention in a non-operating state, and FIG. 2 is a partially omitted schematic side view showing the automatic paper feeder in an operating state. Figure 3 (partially omitted) shows the details of the paper feed roller and auxiliary paper feed roller of the automatic paper feeder. Figure 1 and Figure 4 show the reversing roller and its drive system of the automatic paper feeder 1σ. 5 is a cross-sectional view taken along line v-r in FIG. 4, and FIG. 6 is a diagram showing the relationship between torque limit value and contact pressure of the torque limit means. 12L, 1b... Reversing roller, 2i1, 2b, hammer, Duracon sleeve, 3, 9, 13, 20.23-
= -i1'111.5a, 5b, 10a, 10b, 1
7-=-...P'J, 6...Coil spring, 72
L, 7b...Support plate, 8a, 8b-=...Groove, 1
1a, 11b, 16°18...Belt, 12&,
12b...Paper feed roller, 14...Motor, 1
6...Auxiliary paper feed rollers, 19a, 19b-
・Guide rod, 21 & , 21 b-... Guide surface, 2
2...Pinch roller, 24...Document stand. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2

Claims (1)

[Claims] A first paper feed roller for transporting the paper on the paper placement surface in the paper feeding direction, a rotating reversing roller, and the first paper feeding roller working in cooperation with the reversing roller)l-! ! , distinguish the crowded monthly newspapers one by one and calculate -1-recording method 4 (
A rotating second color-grain type roller for conveying the sheet in the direction, and a direction in which the roller approaches and separates from the paper on the paper placement surface-1-. and a means for transmitting the rotating force of the second paper feed roller to the first paper feed roller,
B. An automatic feeder comprising a power transmission means that applies a force in the direction of moving the first paper feed roller toward and away from the paper when the first paper feed roller is rotated. paper equipment.