JP2800650B2 - Pressing mechanism for stacked paper in paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device for feeding paper stacked and stored in a storage section from a storage section in order from a lower end, and to a pressing mechanism for pressing the paper from above in order to facilitate the paper feeding. .

[0002]

2. Description of the Related Art In general, addresses, names, and the like are often written by hand on paper such as postcards for guidance for funerals and banquets. However, since the handwriting work is often provided by the elderly, it is desired to automate this work. In this case, a paper feeder is conceivable in which a lead-out port is provided at a lower end of a side portion of the storage unit that stores a large number of papers stacked vertically, and the paper is led out from the lead-out port sequentially from the lowermost sheet of the stacked paper.

As such a paper feeder, there is a method in which a feeding means such as a feed roller is disposed at the bottom of the storage section, and this is brought into contact with the lower surface of the lowermost sheet, and is led out of the storage section by contact friction. Conceivable. In this case, an appropriate contact friction is required between the lowermost sheet and the feeding means. The contact friction is obtained by a load from above on the lowermost paper. For this reason, it is conceivable that a weight is placed on the uppermost paper. However, the load applied to the lowermost sheet of paper greatly differs between when a large amount of paper is stacked and when a small amount of paper remains. Therefore, if the weight of the weight is set in accordance with the state where the paper is small, when the remaining amount of paper is large, a large load is applied to the lowermost paper, and the contact friction between the lower paper becomes large. Then, a phenomenon occurs in which the second and third papers from the bottom together with the paper at the bottom come out at the same time. Conversely, if the weight of the weight is set according to the state in which a lot of paper remains, the contact friction between the lowermost paper and the feeding means decreases as the remaining amount of paper decreases. However, there is a problem that feed failure occurs due to the inability to obtain.

[0004]

The object of the present invention is to solve the above-mentioned drawbacks, in particular, with a small force when the amount of paper stacked in the storage section is large.
It is an object of the present invention to provide a pressing mechanism that presses a stacked sheet with a large force when the remaining amount becomes small.

[0005]

In order to achieve the above object, in the paper feeder according to the present invention, a stacking paper pressing mechanism is provided at a lower end of a side portion of an accommodation section for accommodating a large number of papers stacked vertically. In a paper feeder that sequentially draws out from the above-described outlet from the lowest paper of the stacked paper, a vertical guide means is formed on the side wall of the storage section, and a rotation is provided on the side of the guide means. A shaft is provided, and an operating rod is pivotally attached to the rotating shaft, and a pressing member mounted on the uppermost portion of the stacked paper is provided with a slider that slides along the guide means. An engagement groove for engaging the slider is formed at one end of the operating rod. A spring biasing to slide is arranged, and the spring is The distance to the intersection which intersect at right angles to the roots,
The other end of the operating rod is increased as it rotates upward from below , and engages with the engaging groove of the operating rod.
The distance between the slider and the rotating shaft is
It gets smaller as one end gets under the guide groove
And the engaging groove of the operating rod is
The rotor engages with the groove wall of the above-mentioned engagement groove in a state close to a right angle.
It is characterized by being formed in a mountain shape so that it can be formed .

[0006]

According to the above construction, when a large amount of paper is stacked in the accommodating portion of the paper feeding device and a pressing member is placed thereon, a moment acts on the operating member by a spring, and the pressing member slides. The child is biased downward. Therefore, the paper in the storage section is subjected to a load due to the pressing member in addition to its own weight.

By the way, the distance from the axis of rotation of the actuating rod to the intersection intersecting at right angles to the spring, since the other end of the actuating rod is formed so as to be larger in accordance rotates from bottom to top, the The moment acting on the other end also increases as the other end rotates upward, and increases as one end of the operating rod rotates downward.
Therefore, the pressing force of the pressing member by the operating rod also increases as the paper feeding device operates and the remaining amount of paper in the storage unit decreases.

Further , the distance between the rotary shaft and the slider that engages with the engaging groove of the operating rod is formed so as to decrease as the one end of the operating rod approaches below the guide groove. Therefore, when the same moment is acting on the operating rod,
As one end of the operating rod rotates downward, the force acting on the slider increases. Due to the relationship between the bending piece and the spring,
This is even more so because the moment on the operating rod increases as the operating rod rotates downward.

Furthermore, the engaging groove of the actuating rod can be engaged with as perpendicular state close to the grooves walls of the slider always engaging groove of the pressing member. Therefore, the pressing force of the pressing member can be efficiently increased gradually.

As described above, as the paper feeding device operates and the remaining amount of paper in the storage portion decreases, the pressing force of the pressing member against the paper gradually increases. However, there is a problem that two or three sheets of paper are sent out simultaneously because the load on the paper is too large, or that when the remaining amount of paper is small, the load on the paper is too small and sufficient feeding force is not applied to the paper. In this case, a proper pressing force is always applied to the paper, so that a smooth paper feed can be realized.

[0011]

1 to 3 show a paper feed device and a mechanism for pressing stacked papers in the device. The paper feed device is a front side wall of a storage section 2 for storing a large number of papers 1 stacked vertically. The outlet 3 is provided at the lower end, and a feed roller 5 is disposed in an opening 4 formed at the bottom, and the feed roller 5 is driven to rotate so that the paper 1 is led out from the outlet 3 in order from the lowermost sheet 1. In addition, the storage unit 2 is provided with a pressing mechanism that presses the stacked papers 1 downward.

Namely, the housing 2 pressing member 6 is disposed to be placed on top of the stack paper 1. The pressing member 6 includes a roller portion 7 directly mounted on the paper 1.
A support member 8 for rotatably supporting the roller portion 7;
A running roller 9 provided on both sides of the support member 8 and a slider 10 protruding from the center of the support member 8 are formed.

A vertical guide groove 12 (guide means) and a guide groove 12a are formed in a front side wall 11 of the housing portion 2. The guide groove 12 is formed at the front center of a wall 13 having a U-shaped cross section integrally formed on the front side of the side wall 11. The support member 8 of the pressing member 6 is disposed between the U-shaped wall portion 13 and the front surface of the side wall 11 by a traveling roller 9 so as to run freely. The arm 8a of the support member 8 is moved from the guide groove 12a to the housing portion. 2, the slider 10 has a guide groove 12
From the front of the U-shaped wall 13.

[0014] Then, on the front surface of the side wall 11, the guide groove 1
The rotating shaft 14 is fixed to a lower portion on the side of the rotating shaft 2.
, An operating rod 15 is pivotally mounted. A curved engagement groove 16 is formed at one end of the operating rod 15, and the slider 10 of the pressing member 6 is engaged with the engagement groove 16. For this reason, the slider 10 is configured to slide along both the guide groove 12 and the engagement groove 16.

[0015] The other end of the actuating rod 15 is formed as a bent piece 15a which is bent from the pivot portion, the engagement provided on one side upper part of the engaging pin 17 and the side wall 11 of the end portion of the bent piece 15a A tension spring 19 is arranged between the extension spring 19 and the pin 18. The tension spring 19 connects the slider 10 to the guide groove 1.
2 is urged to slide downward from above.

[0016] Pulling the above from the rotating shaft 14 of the operating rod 15
The distance to the point of intersection with the spring 19 at right angles
The distance h when the 15 bent pieces 15a face the lowermost position
1 to the minimum, the larger as you rotate upwards,
The distance h2 when it is perpendicular to the tension spring 19 is the largest.
It is formed as follows.

Next, the distance h3 between the slider 10 to engage the engaging grooves 16 of the actuating rod 15 and the rotary shaft 14, the actuating rod 1
5 is formed so as to be smaller as the one end approaches below the guide groove 12.

[0018] By the way, it is formed at one end of the operating rod 15.
The engagement groove 16 is formed by a first curved portion 16 which is formed in a mountain shape.
a and a second curved portion that curves further from one end to the opposite side
16b. This is for the following reason.

That is, when the engaging groove 16 formed in the operating rod 15 is formed linearly along the longitudinal direction of the operating rod 15, one end of the operating rod 15 is rotated when the operating rod 15 is rotated downward from above. When is located at the upper end position of the guide groove 12, the operating rod 15 forms the maximum inclination angle with respect to the guide groove 12, so that it is difficult to rotate the operating rod 15 downward without applying a considerable force. In addition, the force applied when rotating from above to below decreases sharply as the operating rod 15 becomes perpendicular to the guide means. In addition, when the operating rod 15 is further rotated downward from the right angle state, a large force is again required for the operating rod 15.

On the other hand, when the operating rod 15 is engaged with the guide groove 12 at right angles, the operating rod 15 is in a state where the operating rod 15 can be most easily turned downward. Therefore, in order to eliminate such inconvenience and to rotate the inclined operating rod 15 as smoothly as possible, and the applied force is not so steep and gradually changes, the pressing member 6 is required.
It is preferable that the slider 10 always engages with the engagement groove 16 in a state as close to a right angle as possible. The above-described curved engagement groove 16 is formed to satisfy such a condition.

The links 20 and 21 are for manually moving the operating rod 15 to place the pressing member 6 on the newly stacked paper 1.

According to the above configuration, the storage section 2 of the paper feeder
When a large number of papers 1 are stacked on top of each other and the pressing member 6 is placed thereon, the tension spring 19 is extended, the operating rod 15 is urged to rotate downward, and the slider 10 of the pressing member 6 is moved.
Is also biased downward. Therefore, a load due to the pressing member 6 is applied to the paper 1 in the storage section 2 in addition to its own weight.

By the way, the distance from the rotation shaft 14 of the operating rod 15 to the intersection that intersects the tension spring 19 at right angles is:
Since the distance when the bent piece 15a of the operating rod 15 is directed downward is increased so as to rotate upward, the moment acting on the bent piece 15a also increases. It becomes larger as it turns, and becomes larger as the opposite end of the operating rod 15 turns downward. Therefore, the pressing force of the pressing member 6 by the operating rod 15 increases as the paper feeding device operates and the remaining amount of the paper 1 in the storage unit 2 decreases. The tension force of the tension spring 19 increases as it expands due to its spring constant. However, since the change in force due to the change in the distance is much larger than that, the spring constant can be almost ignored. .

The distance h3 between the slider 10 and the rotary shaft 14 which engages with the engagement groove 16 of the operating rod 15 is determined by the operating rod 1
5 is formed so as to become smaller as it approaches the lower side of the guide groove 12, so that when the same moment is applied to the operating rod 15, as the operating rod 15 rotates downward, the slider The force acting on 10 increases. Due to the relationship between the bending piece 15a and the tension spring 19, the moment with respect to the operating rod 15 is further increased as the operating rod 15 rotates downward. The slider 1 that engages with the engagement groove 16 of the operating rod 15
0 and the rotating shaft 14, the operating rod 15 is
When the operating rod 15 rotates further, the effect of gradually increasing the pressure is weakened. However, in practice, the effect of smoothing the paper feed is impaired at this level. Not.

Further, the engaging groove 16 of the operating rod 15 is
Is formed by the curved portion 16a and the second curved portion 16b.
6 can be engaged as close to a right angle as possible. Therefore, the pressing force of the pressing member 6 can be gradually increased efficiently.

When the paper 1 in the storage section 2 has been completely consumed, the link may be operated to move the pressing member 6 upward, and then to place the paper 1 on the new paper 1 again.

The pressing mechanism for the stacked paper 1 may be configured so that the rotating shaft 14 of the operating rod 15 is aligned with the lower end of the guide groove 12 as shown in FIG. In this case, the engagement groove may be simply curved in a mountain shape. Since the pressing force of the pressing member 6 on the paper 1 gradually increases linearly, more effective paper feeding can be expected.

In each of the above embodiments, an example of a guide groove is disclosed as the guide means, but the present invention is not limited to the groove-shaped guide means. Means such as a guide rail may be used.

[Brief description of the drawings]

FIG. 1 is a front view of a stacking paper pressing mechanism in a paper feeding device according to the present invention.

FIG. 2 is a cross-sectional view of a main part of the pressing mechanism as viewed from a side.

FIG. 3 is a cross-sectional view of a main part of the pressing mechanism as viewed from above.

FIG. 4 is a front view of another example of the pressing mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper 2 Storage part 3 Outlet 6 Pressing member 10 Slider 14 Rotating shaft 15 Operating rod 16 Engagement groove 19 Tension spring

Claims (1)

(57) [Claims] 1. A paper feeder, wherein a discharge port is provided at a lower end of a side portion of a storage section for storing a large number of papers stacked vertically, and the paper is sequentially discharged from the lowermost paper of the stacked paper from the discharge port. A vertical guide means is formed on the side wall of the storage section, and a rotating shaft is provided on the side of the guide means, and an operating rod is pivotally mounted on the rotating shaft, and is mounted on the uppermost portion of the stacked paper. The pressing member is provided with a slider that slides along the guide means, and at one end of the operating rod, an engaging groove that engages with the slider is formed. The other end is provided with a spring for urging the slider to slide downward from above along the guide means, and the distance from the rotation axis of the operating rod to the intersection point intersecting the spring at a right angle is provided. The larger the other end of the operating rod is turned from below to above, the larger it becomes. So that the operating rod
The distance between the slider engaging with the engagement groove and the rotary shaft is
As the one end of the operating rod approaches below the guide groove,
It is formed so as to be small, and
The groove is set so that the slider is almost perpendicular to the groove wall of the engagement groove.
A stacking paper pressing mechanism in the paper feeder, wherein the stacking paper is formed so as to be capable of engaging in a state of being bent .