JPS58224932A - Paper transport apparatus - Google Patents

Abstract

PURPOSE:To prevent a paper jamming by driving an endless belt brought into pressure contact with a part of the outer peripheral surface of a rotatable cylindrical guide and clamping and transporting a sheet at a portion where the belt and the guide contact with each other and move in the same direction. CONSTITUTION:Paper 60 is transported in the direction of an arrow C and advanced between a cylindrical guide 33 and an endless belt 56, so that the paper is clamped and transported at a portion where the guide 33 and the belt 56 contact with each other and move in the same direction, and at the same time the direction of transporting the paper is changed substantially 180 deg. to feed out the paper in the direction of an arrow D. Therefore, even if the diameter of the guide 33 is reduced to a certain degree, no paper jam is caused. As the guide 33 and the belt 56 will not contact with a fixed member, there is no torque loss for rotating and running them, which results in that a motor 38 can be reduced to a compact size and the paper 60 can be transported without contacting with the fixed member so that there is no possibility of paper jamming.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper conveying device such as 84-J for facsimile machines, compound machines, etc.

For example, with hook 1 ximm... (, 1, small! In order to make vJ
There is one that changes the 751'inI to discharge C.

Further, for example, in a duplex 77' machine that performs double-sided printing (1-beam printing) or multicolor printing (11-color printing), there is one in which the conveyance direction of the recording paper that has passed through the previous recording section is changed and the paper is sent to the next recording section.

FIG. 1 shows an example of such a conventional sheet conveying device. In this device, a pair of sheet metal (feed rollers 3) are installed at the inlet [] and outlet of the U-shaped guide 1.2.
．． 4 and pinch roller 5.6 are respectively set. The paper 7 is fed into the feed roller 1.2 by the feed roller 3 and the pinch roller 5 on the side [1], where it is The conveyance direction can be changed by approximately 180 degrees, and the paper is then sent out by the feed I' [1-ra 4 and pinch "]-ra 6 on the 1 side.

By the way, in this type of 41 type, it is necessary to change the conveyance direction of the paper 7 by almost 180 degrees (...) [If the curvature of the U-shaped guide 1.2 is too small, it may not be possible to bend the paper 7 completely if the M7 is stiff. Sometimes paper jams may occur.

In addition, 1) The curvature of the U-shaped guide 1.2 has been increased, but if its length is shortened, the feeding direction (l) of the U-shaped guide 1.2 at the inlet and the outlet will change greatly. The paper 7 may bend 7) and cause a paper jam. 1) If the curvature of the glyph guide 1.2 is adjusted to a certain extent, the culm must be lengthened to a certain extent. In addition, if the length of the paper 7 is shorter than the guide 1.2", it cannot be conveyed, so there is a drawback that only paper of a certain size or more can be conveyed.

FIG. 2 shows an example of a conventional sheet conveying device with the drawbacks removed. In this device, a sheet-shaped guide 12 made of synthetic resin is brought into contact with the outer peripheral surface of square guides 1-11 made of sheet metal.

One end t of the kite IZ12 is fixed to the i-frame 13, and the other end (after being wound around the U-shaped kite 14, the spring 15 is pulled). A main pulley 16 and a slave pulley 1 are installed at both ends.
7, ]8 are provided respectively. Slave pulley 17,
A beltless belt 19 is wound around I E3. A part of the belt 1-19 is pressed against the outer peripheral surface of the guide 11, and the other part of the belt Guy 1~1
The paper 20, which is in contact with the outer circumferential surface facing 1 and 1, is bent in the transport direction of A while being held between the bell 19 and the kite 12 and being transported.

As a result, even if the curvature of 1J-shaped guide] 1 is reduced to a certain extent, paper jams will still occur.
It is possible to transport even 0.

However, in the conventional belt 11 like this, the bells 1 to 19 are in sliding contact with the fixed guide 11, and the paper 20 (also in sliding contact with the fixed guide 12). It is necessary to increase the torque to a certain extent, which increases the size of the drive source, the heptad. Also, the amount of wear on the belt 19 and the kite 12 is large. !”< Since I send m, my forehead is still very crowded.)
1. By the way, there is one main pulley 16 in the apparatus shown in FIG. 2, shown in FIG. 3. 1
-1-ri 16 is 11 U1 white right on shirt 1-21 (ε
A clutch device 2 is installed on one end surface of the slider 16, which slides in the direction of the axis 7.
There is C11. 1 nib 16 is Snow Ring 231J)
The clutch device 22 is normally held in a predetermined direction by the shaft 2! It has been determined that 11-
C is touched. When the shaft 21 is rotated by a motor (not shown), the second rotation horn is transmitted to the second rotation horn 22t via the collar 24, and the main pulley 16 is rotated by the second rotation horn.
The figure shows J5 (rotated in the direction of the arrow from 1 to G).
19, and the paper 20 (7) is transported as if it were distributed. At this time, the speed of the paper 20 being sent here may change or stop. For example, T
),・Kushimiri transmitting device T” 4; L, if there is no information for a part of one vehicle, increase the feeding speed, ma/,=
There is a system that temporarily stops the transmission of signals that take a long time to transmit or receive from the other party. The running speed 1 of the mokode bell 1-19 is set faster than the normal paper conveyance speed to appropriately prevent slip between the clutch plate 22 and collar 24 during normal paper conveyance or when stopping. This changes the speed IQ of the paper 20 and prevents it from stopping or causing damage to the paper 20.
Also, between this and l\le 1 to 19, C suritsuno' or 11. In this case, there is an advantage that the valve gt noise t1 is /1-1 noise 1.

In such a conventional device, two or more belts 19 are provided at intervals in the width direction of the paper 20, and these belts 19 are used to convey the paper 20 evenly over the entire surface. In other words, the rotational force is transmitted to each main row 516 via each clutch plate 22, and its performance is influenced by the surface condition of each clutch plate 22 and collar 2/I, as well as the elastic force of each spring 23. However, if these strips f[ are all uniformly rotated (this is extremely rotational), and if used for a long period of time, variations will occur.
The direction of conveyance of the condensed paper 20 is skew: r - (skew
) may occur. In addition, since a main roller 16, a clutch plate 22, a spring 23, a paralytic collar 24, etc. are provided every 19 times to each bell 1, the structure becomes complicated and the number of strokes increases.

The present invention has been made in view of the above circumstances.
I learned that it was possible to make the device more compact and to convey paper (not only can it be done, but it is also relatively small).
1. : The purpose is to provide a paper conveying device that is free from paper jams.

In the present invention, a cylindrical guide is rotatably provided, a part of the endless belt is pressed against a part of the outer circumferential surface of the guide, and these are driven into contact with each other. The paper is conveyed while being held between the parts that move in the same direction as the above (L1 target described above).

The present invention will now be described in detail with reference to Examples.

FIG. 4 shows a side view of the LL paper conveyance device, and FIG. 5 shows its hemostatic diagram. A shaft 331 is rotatably attached to a frame (not shown) of this device via a bearing 32. Number 1 is 31, and the cylindrical guide 3 has a length corresponding to the width of the largest sheet of paper to be used.
3 is fixed.

A clutch plate 3 is provided at one end of the cylindrical guide 33. Opposed to the clutch plate 34, C, S1? ]1
A pulley 35 with a two-stage structure is installed in the rotation direction I and slidably in the direction of the arrow △ and 13h.
is fixed. ) A spring 37 is installed between the 35 and 36.

The pulley 35 is urged in the direction of the arrow by the force of the spring 67, and its large diameter portion is normally pressed against the clutch plate 34. Small diameter part of pulley 35 and output shaft 3 of motor 38
Between the pulley/IO fixed to 9 is a toothed bell i~41
is wound.

A shaft 1/ft/+5 is provided below the shaft 31. A shaft 45 is rotatably mounted on the frame via a bearing 46. shaft 45
Four pulleys/17 are fixed at equal intervals.

These pulleys 47 are slightly spaced apart from the cylindrical guide 33. A gear r48 is fixed to one end of the shaft 45. Gear A748 is meshed with gear r49 fixed to shifts 1-31. The shaft 50 is installed on the side 1 of the shafts 1 to 31. Place 7 No. 1-5'O install the bearing 51 on the frame -cr
It is attached to the right of the +1r rotation. Sea 11ft 50i
Here, four boos 952 are fixed at equal intervals. These pulleys 52 move from the cylindrical guide 33 to a certain culm,
It's been canceled.

The proximal ends of arms 53 are rotatably attached to both ends of the shirt t":>0. The arms 53 have a diameter of 31 and a shaft of 31.50. A shaft 54 is rotatably suspended horizontally at the tips of these horns 53. One pulley 55 is attached to the shaft 54. are fixed at equal intervals.Three corresponding pulleys 47, 52, and 55 have T-node dress bells 1.
~56 are each wound.

A portion of these cone dress belts 56 is exposed and pressed against the outer circumferential surface of the cylindrical guide 33 facing the 1-ri 52 . A bottle 57 is installed at a predetermined location on each of the two arms 53. Further, at predetermined locations on the frame, bins 58 are arranged in hti stages, respectively, and both ends of the 1-1 springs 59 are fitted in these bins 57 and 58, respectively. In the diagram, the arm 53 is in the 5J state shown by the solid line. ~31
1. /'+-, and the (1) knotless belt 56 is in contact with Jf over approximately half the outer circumferential surface of the cylindrical guide; 33. The pressure force of this endless belt 56 is 1 to -
Changing the elastic force of John spring 5''g (adjusted by this).

When the motor 38 of this device is driven, this rotational force is transmitted to the cylindrical guide J (3) and the shaft noft 31 via the toothed belt 41, pulley 35, clutch plate 35, etc. G and T are rotated counterclockwise.The rotational force of shirts 1 to 31 is transmitted via gear A749.48 to shirt /I5 and pulley /I7, which are connected to the same figure! J is rotated in the vertical cutting direction.The belt-1-1~rest belt 56 is run in the direction of the h1 corner in the figure.The circular guide 33 and the rest belt 5G The running speed of 1 k can be maintained at the same speed by appropriately selecting and changing the rotation ratio of the gear 748.49. The paper 60 in this state is shown by the arrow C.
-Entered between 56 and 56. ＼RelJ Take. This approach is IJ
River use 60&ma, cylindrical guide 33 and endless bells 1 to 5
6-7-/1,] Since the C and C are in contact and are not conveyed while being held by the parts that move in the same direction, the direction of conveyance can be changed by approximately ]80 degrees. After this, the paper 60 is moved to the cylindrical guide 33
It is fed out from between the top of the belt and the belt 56 as shown by the arrow]] ().

In this way, the tj of the cylindrical guide 33 and the 1st dress bells 1 to 56 (this contact 1.
, -) while holding and transporting the paper 60.
Therefore, if the diameter of the cylindrical guide 33 is made smaller by a certain culm, there will be no more than 6 paper jams, and the short paper 60 can be conveyed 6 times.

In addition, the sheet 60 and the cylindrical guide 33 that transports it are lined up with M I-entresses 1 to 5 (5). (1) for running the belt 56
- It is <j- that [1s occurs in Luk. By reducing the size of the motor 38, which is the drive source for these components, to some extent,
,"b can get enough 1 herk (・kiru.malgosimplificationg)J iF',"33 a> J, U, -1
'／ トL／ 、'l え）Lt ト56! , L It
Since there are no fixed or contacting parts, there is little chance that these will become stained. Since the paper 60 can be roughly conveyed without coming into contact with the fixing member, there is less risk of paper jamming.

゛If the speed of the paper 6o sent to this device slows down or stops, the paper 6o that is being sent to this device should be moved between the clutch plate 34 and the pulley 35 or between the cylindrical guide 33 and the clutch plate 34.
Slip occurs appropriately during the period C. Therefore, even if the speed of the paper 60 changes or it stops, damage to the paper 60 is prevented.
1? l-can also be used with this and the cylindrical guide 33. B
, J, and the endless belt 56, there is no noise that would occur if slippage occurs.

Also, in case C, the paper 60 is not in its normal state, for example, it is bent or water droplets have not adhered to it, and the paper jams during transportation. Cylindrical guide 33 clutch plate 34
Since there is a lot of slip between the two, this does not cause any load on the motor 38. eThis J again, Ui T
When the phenomenon occurs, the node 53 is rotated in the hour h1 direction at the fourth piece using the shirts 1 to 50 as fulcrums. J and 1 - Due to the action of the John spring 59, the arm 53 is held in the state shown by the two-dot chain line in the same figure, and a part of the L beltless belt 56 is attached to the cylindrical guide 3.
separated from 3. Therefore, it is possible to easily remove paper jams.

In addition, the transmission of the rotational force from the motor 38 to the cylindrical guide 33 and the torque bells 1 to 47 is carried out by a set of glues such as 334, so that the performance of
C can be stably moved over the length of 1 to 56, and when conveying the paper 60 (the key L- will not be 1. Also, even if there are multiple address bells 1 to 56, the iN clutch to 3
All you need to do is to set 4 etc., the configuration is in the cylinder, and
[This] It is possible to aim for a downturn.

4. In the embodiment described below, gear 1//I8.40 is used (the rotation of the shutter 31 is set) l~45 LJ transmission (but it is limited to this) R.

For example, install a cylindrical guide 3' corresponding to both ends of the cylindrical guide 33,
It is also possible to transmit 11 points tj (1'i!1 inverted horn) to S3.

As explained above, according to the present invention, since the paper and the member that conveys it do not come into contact with the identification member, the conveyance direction of the paper can be changed with a relatively small torque of 1, and the drive line ( The motor can be made smaller.Also, the paper can be transported without contacting the fixing member, and there are almost no paper jams.
^ This can be achieved by performing stable paper transport with high performance. Furthermore, since the paper conveyance device does not come into contact with the fixed member, it hardly wears out, improving durability.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an example of a conventional paper transport device, Fig. 2 is a schematic side view showing another example of a conventional paper transport device, and Fig. 3 is a front view of a part thereof. , FIG. 4 is a side view showing a paper wJ feeding unit in an embodiment of the present invention, and FIG.
33...Cylindrical blade 34...Clutch class; 38...Motor 47.52.55... ...L-53...Arm 56...Endless Bell 1-60...Form application Hitotomi Juze [1 Tsukusu Co., Ltd. Ne1 Agent] Valve 1゛+l+ inside 4N #1

Claims (1)

[Claims] Equipped with a rotatably provided cylindrical guide, an endless belt whose part is pressed against a part of the outer circumferential surface of the cylindrical guide, and a driving means for rotating the cylindrical guide and driving the endless belt. A paper conveying device characterized in that a cylindrical kite and an endless belt are in contact with each other and move together in two directions to grip and convey the paper.