KR100538062B1 - paper supplying device for photocopier - Google Patents

Abstract

The present invention relates to a paper conveying apparatus for a copying machine, wherein one side of a one-way bearing having a first gear is formed with a cut angle having a first angle and a first and second sides in a range of a predetermined angle. The inside of the part is a structure in which the key of the rotating tubular body interlocking with the first driving roller part is freely rotated between the first and second surfaces of the incision angle part. It is possible to reduce the unit cost of the product by simplifying it, and to prevent the feeding by forming a loop just before the paper entry and transfer.

Description

Paper feeder for photocopiers {paper supplying device for photocopier}

The present invention relates to a paper feeder for a copier, and more particularly, to facilitate the transfer of copy paper while using one unidirectional bearing on the first axis, thereby simplifying the structure of the feeder and at the leading edge of the paper. A loop is formed to prevent feeding.

Generally, the copier is equipped with a plurality of paper cassettes for storing and accommodating copy papers of various specifications, and one side of the paper cassette is equipped with a conveying device inside the copier so as to transfer the loaded copy paper into the inside of the main body. Will be.

1 to 4 show a conventional paper conveying apparatus. First, on the housing 12 of the paper conveying apparatus 10, the first and second shafts 14 and 16 are disposed at a predetermined distance along the longitudinal direction. It is installed and supported in parallel while being spaced apart, and one end of the first shaft 14 is connected to an electronic clutch (not shown) for controlling power transmitted from the driving motor of the copier.

In addition, the one-way bearing 20 and the second gear part in which the first gear part 18 is formed on one side on the first and second shafts 14 and 16 which are horizontally penetrated through the side surface of the housing 12. The one-way bearing 24 forming the 22 is engaged, and the third gear portion 26 connects the hinge shaft 28 of the housing 12 between the first and second gear portions 18 and 22. The outer side of the one-way bearing 20 in which the first gear portion 18 is formed is engaged with each other in a state of rotating in the center, and the key grooves are formed on one side so as to freely rotate separately from the rotation of the one-way bearing 20. The one-way bearing 32 in which 30 is formed is provided.

In addition, the outer side of the one-way bearing 32 is coupled to the rotary tube 36 having the first roller portion 34 on both sides, the key 38 formed on one side of the rotary tube 36 is It is coupled to interlock with the key groove 30 of the corresponding one-way bearing 32.

In addition, the outer side of the one-way bearing 24 coupled to the second shaft 16, the rotary tube having a second roller portion 40 in the same structure as the rotary tube 36 installed on the first shaft 14 ( 42 is coupled, and the key 44 formed in the rotary tube 42 is inserted into and interlocked with the key groove 25 of the corresponding one-way bearing 24.

On the other hand, a rotary tube 48 having a third roller portion 46 is coupled to the third shaft 50 at the vertical lower portion of the first roller portion 34 so as to be in close contact therewith. The tubular body 48 is connected with the torque limit.

In addition, the bottom surface of one side of the second shaft 16 corresponding to the second roller portion 40 is configured to be seated on the upper surface of the lever that rotates around the hinge axis.

Reference numeral 52 denotes a transfer roller, 90 a sensor unit, and 53 and 53a are paper.

As shown in FIGS. 1 and 2 of the accompanying drawings, the conventional conveying apparatus configured as described above, first, when the paper cassette loaded and accommodated is slidably accommodated in the copier, the paper cassette is accommodated and the conveying apparatus ( 10) Push the lever (not shown) on the lower portion of the second shaft 16 in the clockwise direction, where the second shaft 16 is seated on the upper surface of the lever, so that the second shaft 16 When the paper cassette is completely mounted inside the copier, the second driving roller part 40 provided on the second shaft 16 may be formed of paper of the paper cassette. 53) It is settled on the upper surface and finishing the transfer preparation.

Simultaneously pressing the copy start button in this state, the copy paper 53 is conveyed while passing through the first and second drive rollers 34 and 40. First, the driving force of the motor installed on the side of the copier is connected to the power transmission gear. It is transmitted to the electromagnetic clutch provided at one end of the first shaft 14 through the part, and when this electromagnetic clutch is operated, the one-way bearing in which the first shaft 14 is rotated and the first gear portion 18 is formed at the same time. 20 is interlocked and rotated, and the rotary tubular body 36 having a pair of first roller parts 34 rotates in the feed direction of the paper in cooperation with the first shaft 14.

At this time, the key 38 formed at one end of the rotary tube 36 is coupled to the key groove 30 of the one-way bearing 32 corresponding thereto, so that when the first shaft 14 rotates in the paper feed direction, , The one-way bearing 20 having the first gear portion 18 and the rotating tubular body 36 having the first roller part 34 and the one-way interlocking with and coupled to the key 38 of the rotating tubular body 36. The bearings 32 are all rotated at the same time.

In addition, when the first gear portion 18 rotates, the third gear portion 26 engaged in the horizontal state rotates in the counterclockwise direction, and when the third gear portion 26 rotates, The one-way bearing 24 of the second gear portion 22 engaged with the third gear portion 26 rotates separately from the second shaft 16.

When the one-way bearing 24 having the second gear 22 is rotated, the rotary tubular body having the second driving roller portion 40 in the key groove 25 of the one-way bearing 24 is formed. The key 44 of 42 is inserted and interlocked so that the second drive roller portion 40 rotates simultaneously with the rotation of the one-way bearing 24 having the second gear portion 22, and thus the first shaft. Only when the 14 is rotated, the first and second drive rollers 34 and 40 simultaneously rotate and interlock.

As the second driving roller part 40 seated on the upper surface of the paper 53 is rotated in the clockwise direction as described above, the first copy paper 53 is first shown in FIG. It passes between the first drive roller portion 34 and the third drive roller portion 46 in close contact with the vertical lower portion, wherein the paper 53 has the same friction force acting on the first and third drive roller portions 34 and 46. As a result, a predetermined force or more acts on the torque limit connected to the third shaft 50 of the third drive roller portion 46 to transfer the paper 53 to the inside of the copier.

Meanwhile, when two sheets of paper 53 are conveyed, the paper 35 abuts against the first driving roller part 34 and the third driving roller part 46 as shown in FIG. 4. The frictional force of the paper 53a acts the same, but the frictional force between the paper 53 and 53a is smaller than the frictional force of the paper 53 and 53a abutting against the first and third drive roller parts 34 and 46 so as to be instantaneously reversed. As a result, the paper 53 abutting against the first driving roller portion 34 is conveyed and the paper 53a abutting against the third driving roller portion 46 is not transferred.

In this way, the paper 53 passing through the first and third drive rollers 34 and 46 is converted by the feed roller 52 from the horizontal direction to the vertical direction, and the paper 53 is transferred to the feed roller. The moment the contact of the sensor unit 90 provided in the 52 stops the operation of the electromagnetic clutch, the rotation of the first shaft 14 is stopped. (See FIG. 7A)

At this time, when the electromagnetic clutch is in a stationary state, the rotational force transmission of the first, second, and third driving roller parts 34, 40, and 46 is stopped, and the copy paper 53 is a separate feed roller 52. The transfer paper 53 and the first and second copy paper 53 are completely passed through the first, second, and third drive roller parts 34, 40, and 46 as the transfer operation is continuously performed by The three drive roller parts 34, 40 and 46 are in contact with each other.

In addition, the first, second, third driving roller parts 34, 40, and 46 may be formed by the one-way bearings 32, 24, installed in the first, second, and third axes 14, 16, and 50. In the state in which the rotation of the shafts 14 and 16 is stopped, free rotation (wrong operation) is performed by the friction force of the paper 53.

Through this process, the one-way bearing 24 of the rotary tube 42 and the one-way bearing 18 are formed on one side of the moment when the copy paper 53 passes completely through the second driving roller 40. 20 is segmented with each other, so that the rotational force transmission of the one-way bearing 20 in which the first gear portion 18 is formed is not achieved.

In addition, when the rotation of the second gear unit 22 connected to the first gear unit 18 is stopped and the rotation of the second drive roller unit 40 is stopped, the bottom surface of the second drive roller unit 40 is stopped. The paper 53 which is in close contact with the paper waiting to be transported is not made, and the paper 53 passing through the first driving roller part 34 has the first driving roller part 34 by mutual frictional force, and Only one-way bearing 32 in conjunction with this will be free to rotate (turning state).

On the other hand, when the paper 53 completely passes through the first driving roller part 34, the frictional force with the paper 53 is released and the free rotation of the rotary tube 36 having the first driving roller part 34 is stopped. The paper 53 is transported by repeatedly performing such a series of processes.

However, as described above, the conventional paper feeder for the copier firstly rotates only the rotary tube 36 of the first driving roller portion 34 so that the paper 53 finally passes, the second gear portion 22. The rotary tubular 36 and the first gear 18 are separated in order to prevent the feeding of the next sheet or the middle feed due to the rotation of the second driving roller portion 40 by dividing the power with the one-way bearing 24 having The separate one-way bearings 32 should be provided between the one-way bearings 20 provided, thereby increasing the number of parts, which complicates the configuration of the paper conveying device and increases the unit cost of the product according to mass production. There is a problem.

In addition, when the second driving roller part 40 is rotated by 360 °, the tip of the paper 53 is not in close contact with the first driving roller part 34 and thus does not form a loop. There was a problem in that the paper 53 is not quickly entered and conveyed at the time of rotation, thereby preventing the jam and the feeding of the paper.

The present invention has been made in order to solve the above problems, a certain portion of the one-way bearing formed with the first gear portion is formed by the incision angle portion, the rotating tubular body having a first driving roller in the range of the incision angle portion is free. It is an object of the present invention to provide a paper transfer device for a copying machine that can reduce the cost of the product by simplifying the structure while simplifying the transfer of the copying paper.

The present invention for achieving the above object is formed in one side of the one-way bearing provided with the first gear portion has a constant angle range and the incision angle portion having a first and second surfaces inside both sides is formed, this inclination angle portion The inside of the structure is installed so that the key of the rotating tubular body interlocking with the first driving roller part freely rotates between the first and second surfaces of the incision angle part, thereby making it possible to smoothly convey the paper by using only one unidirectional bearing. The configuration is simple, and there is a feature that can reduce the cost of the product.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

5 and 7 are views illustrating a paper feed apparatus for a copying machine of the present invention, the same reference numerals as in the attached exemplary drawings 1 to 4 denote the same parts, and thus a description thereof will be omitted. Only the points different from FIGS. 1 to 4 will be described.

5 to 7, first, first and second axes 14 and 16 horizontally supported on the housing 12 and first and second axes 14 and 16 on the first and second axes 14 and 16. Rotating pipes 36 and 42 having two drive roller parts 34 and 40, one-way bearing 24 and third gear part having a second gear part 22 on the second shaft 16. 26 is provided in the same structure as in the prior art, in which the present invention firstly comprises a one-way bearing 60 in which the first gear portion 18 is formed to be engaged with the third gear portion 26 on the first shaft 14. ) Is provided, and the other end portion of the one-way bearing 60 corresponding to the first gear portion 18 is cut by a predetermined angle to form the first and second surfaces 62 and 64 on the inner surfaces of both sides. The key 38 of the rotating tubular body 36 is formed in the part 66 so that the key 38 of the rotary tubular body 36 is positioned inside the inclined angled part 66, so that the rotary tubular body 36 is finally formed in the incidence angled part 66. Installed freely rotating in the range of A.

In the figure, reference numeral 80 denotes a paper leading end.

In the present invention configured as described above, first, when the paper cassette is completely accommodated in the inside of the copier, the second shaft 16 is lowered about the first shaft 14 by its own weight to the second shaft 16. The provided second driving roller part 40 is seated on the top surface 53 of the paper cassette, and the cut angle part 66 formed on one side of the one-way bearing 60 corresponding to the first gear part 18. The first surface 62 is brought into close contact with the key 38 of the corresponding rotary tube 36, as shown in the accompanying drawings, FIGS. 7 (a) and 7 (b). ) You are ready to move.

In addition, when the copy button is pressed in the above state, the first shaft 14 is rotated and only the one-way bearing 60 provided on the first shaft 14 is rotated so that the key of the rotary tube 36 The second surface 64 of the incision angle portion 66 is in close contact with 38.

At this time, when the first surface 62 in close contact with the key 38 of the rotary pipe 36 rotates and the second surface 64 comes into close contact with the key 38, the rotary pipe body 36 having the first driving roller part 34 is provided. ) Remains stationary regardless of the rotation of the first shaft 14, and at the same time the rotational force of the first gear portion 18 rotates the second gear portion 22 through the third gear portion 26. It is to be made.

Then, the one-way bearing 24 and the second driving roller portion 40 rotate by the rotation of the second gear portion 22, so that the first copy paper 53 is immediately before the first driving roller portion 34 enters. It will be located in the transported state.

That is, the first angle 62 of the cutting angle portion 66 of the one-way bearing 60 provided on the first shaft 14 is in close contact with the key 38 of the rotary tube 36, and then rotates for the first time. Just before the second surface 64 is brought into close contact with the second surface 64, the first drive roller part 34 rotates only the second drive roller part 40 in the stopped state, thereby turning the tip of the paper 53 to the first drive roller. At the same time as closely contacting the portion 34, the tip portion of the copy paper 53 is finely looped.

In addition, while the second surface 64 continues to rotate and closely adhere to the key 38, the second driving roller part 40 continues to rotate to transfer the paper to the first driving roller part 34.

Then, when the second surface 64 continues to rotate while being in close contact with the key 38 of the corresponding rotary tube 36 in the above state, as shown in Figure 7 (c) attached The first driving roller 34 is rotated to convey the paper 53. At this time, the tip portion of the paper 53 forms a loop, and then the paper is instantaneously horizontally formed by the elastic force of the paper 53. The front end of the 53 is quickly entered between the first driving roller part 34 and the third driving roller part 46 vertically installed to prevent the feeding and jamming of the paper 53. .

On the other hand, due to the rotation of the first shaft 14, the first and second drive rollers 34 and 40 rotate for a predetermined time to transfer the copy paper 53 for a predetermined time so that the leading edge of the paper in the sensor unit 90. When detected, as shown in the accompanying drawing of FIG. 7 (d), an electromagnetic clutch (not shown) installed on the first shaft 14 may interrupt the power to stop the rotation of the first shaft 14. The rotation of the first and third drive rollers 34 and 46 stops the transfer of the paper 53 loaded on the paper cassette.

Then, when the copy paper 53 is started to be transported by a separate transport roller 52, the second surface 64 of the first driving roller portion 34 and the incision angle portion 66 is the rotary tube 36. Copy paper 53 in a state in which the key 38 of the rotary tube 36 is free to rotate in the range of the incision angle portion 66 to be in close contact with the second surface 62. ) Continues to be transported. At this time, the first and third drive roller parts 34 and 46 are free to rotate (rotate) with the frictional force of the paper while the rotation is stopped, and the copy paper 53 is the first and third drive roller parts 34 and 46. After passing through), free rotation of the first drive roller part 34 is no longer made and stops, waiting for the next paper 53 to be transported. The paper 53 is conveyed by repeatedly performing this series of processes. It is to be made.

Meanwhile, the distance between the shaft ₁ between the first shaft 14 and the second shaft 16, the outer diameters D ₁ and D _{2 of the first} and second roller parts 34 and 40, and the paper in the cassette. According to the distance l ₂ between the tip portion 80 and the second axis 16, the angle of the incision angle portion 66 can be adjusted and accordingly the fine loop amount L _P can be adjusted.

For example, the distance between the shafts l _{1 of the first and} second shafts 14 and 16 is 32 mm, and the distance l ₂ between the second shafts 16 from the paper leading edge 80 in the cassette is 15 mm. When the outer diameters D ₁ and D _{2 of the first} and second roller parts 34 and 40 are 19.7 mm, the angle range of the incision angle part 66 is as follows by Equations 1 and 2 below. . (Dc is the cutting angle of the cutting angle section 66, Lp is the loop amount)

That is, as shown in the above equation, when the cutting angle Dc of the cutting angle part 66 is 186 °, the distance l ₂ is approximately 15 mm, and the loop amount Lp is set accordingly.

Therefore, in the related art, the first driving roller part 34 prevents rotation of the second driving roller part 40 by dividing the rotational force with the one-way bearing 20 in which the first gear part 18 is formed during free rotation. In order to install a separate one-way bearing 32 in between, eventually to use a pair of one-way bearing (20, 32) to complicate the configuration of the paper conveying device is a factor of the increase in the unit cost of the product due to mass production, In addition, it was not possible to prevent the feeding due to the formation of a loop at the leading end when the paper 53 enters, but the present invention cuts the rear end portion of the one-way bearing 60 in which the first gear portion 18 is formed. It is possible to make it possible to smoothly convey the paper 53 by using only one unidirectional bearing 60, thereby simplifying the configuration and reduce the unit cost of the product, and at the leading end when entering the paper 53 Form a loop to quickly So to be capable of preventing jam and jungsong phenomenon of the paper in advance.

By using one unidirectional bearing on the first axis to facilitate the transfer of copy paper, it is possible to simplify the configuration of the paper feeder and to prevent the feeding by forming a loop during the paper entry movement.

1 is a perspective view showing a paper feeder for a conventional copier

2 is a plan view of FIG.

3 is a side view showing a conveyance state of one sheet of paper;

4 is a side view showing a conveyance state of two sheets of paper;

Figure 5 is a perspective view showing a paper feed apparatus for a copying machine of the present invention

Figure 6 is a perspective view showing a drive roller unit of the present invention

Figure 7 (a) is a side view showing the paper conveying state of the paper cassette (b) is a side view showing the entering state of the paper (c) is a side view showing the conveying state of the paper (d) shows a state that the paper finally passes through Side view

<Explanation of symbols for main parts of the drawings>

10: paper feed device 12: housing

14: first axis 16: second axis

18: first gear 20, 24, 32, 60: one-way bearing

22: second gear part 26: third gear part

28: hinge axis 30: key groove

34: first roller portion 36, 42, 48: rotary tube

38,44: height 40: second roller portion

46: third roller portion 50: third axis

62: first page 64: second page

66: incision angle part

Claims (2)

The housing 12 is provided in parallel with the first and second shafts 14 and 16 spaced apart from each other, and the first and second gear portions 18 and 22 are disposed on one side of the first and second shafts 14 and 16. And one-way bearings 20 and 24 having a) are coupled, and a third gear portion 26 for transmitting power is engaged between the first and second gear portions 18 and 22, and the first On the outer side of the one-way bearing 20 in which the gear portion 18 is formed, the one-way bearing 32 in which the key groove 30 is formed on one side is freely rotated. The rotary tubular body 36 having the first driving roller part 34 is coupled, and the key 38 formed on one side of the rotary tubular body 36 corresponds to the key groove 30 of the one-way bearing 32. The second drive roller portion 40 is the same as the rotary tubular body 36 installed on the first shaft 14 on the outside of the one-way bearing 24 coupled to the second shaft 16. ) Compared to the rotary tube 42 is coupled, the key 44 formed in the rotary tube 42 is inserted into the key groove 25 of the corresponding one-way bearing 22 to the paper feeder coupled to interlock In One side portion of the one-way bearing 60 having the first gear portion 18 forms a range of angles, and an incision angle portion 66 having first and second surfaces 62 and 64 is formed on both sides thereof. The key 38 of the rotary tube 36, which interlocks with the first driving roller portion 34, is formed on the inside of the incision angle portion 66, and the first and second surfaces 62 and 64 of the incision angle portion 66. Paper feeder for copiers, characterized in that installed so as to rotate freely between. The method of claim 1, The angle Dc of the incision angle portion 66 is the interaxial distance l _{1 of the first} and second axes 14 and 16 and the outer diameters D ₁ and D of the _first and second drive roller parts 34 and 40. ₂ ) and a paper feed device for a copying machine, characterized in that set in accordance with the distance (l ₂ ) between the cassette paper leading end (80) and the second shaft (16).