JPS59201882A - Sheet-supplying device - Google Patents

Abstract

PURPOSE:To enable to widen a paper sheet containing part and to securely return a paper sheet which is fed reversely, by providing a lower guide plate so that an extension line thereof is positioned above the tip of an upper guide plate, in a typewriter or the like. CONSTITUTION:When supplying a paper sheet, a platen 13 is rotated reversely, and a solenoid 67 is energized to bring a separating roller 34 into contact with the paper sheet 57. Since the roller 34 is brought into contact with the paper sheet 57 only when supplying the latter, in the case of reversely feeding the paper sheet 57, e.g., for printing separately in two columns at left and right parts of the sheet, the sheet can not be erroneously supplied by the reverse rotation of the platen 13. In addition, since the lower guide plate 89 for guiding the paper sheet when supplying the sheet or reversely feeding the sheet is so positioned that the extension line thereof is positioned above the tip of the upper guide plate 88, the paper sheet 91 formed between the plate 89 and the third guide plate 90 is wide, so that when reversely feeding the paper sheet by reversely rotating the platen 13 after printing on the left side is completed, the paper sheet can be securely contained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet feeding device that is detachably attached to a business machine such as a printer or a typewriter and supplies paper sheets to the business machine.

[Technical background of the invention and its problems]

Printers, typewriters, and the like are constructed such that a pinch roller is circumferentially attached to a platen, and by rotating the platen in the forward direction, a sheet of paper inserted between the platen and the pinch roller is fed in a predetermined direction. This type of office machine is generally equipped with a paper feeder having a paper holding section, and the paper sheets held in the K and M layers are taken out one by one by a separating roller and placed on an upper guide plate and a lower guide plate. The material is supplied between the platen and the pinch roller through the space between the platen and the pinch roller.

There are two ways to print on a leaf: one is to start a new line sequentially from the top, and the other is to print separately in two rows on the left and right sides, as shown in Figure 1. In other words, on the left side of leaf 1 ( After completing the printing of part A in the figure, rotate the platen in the opposite direction and feed sheet 1 back to the original printing position. part) is printed.

At that time, instead of returning the reversely fed paper sheets between the upper guide plate and the lower guide plate, a third guide plate is provided below the lower guide plate, and the third guide plate and the lower guide plate are connected to each other. It is thought that it will be returned in time. This is because the space between the upper guide plate and the lower guide plate is narrow and the structure near the trench is also double Zf6.

However, the reversely fed paper sheet is securely connected to the lower guide plate and the third
It cannot be said that it will return between the upper guide plate and the lower guide plate, and there is a risk that it will return between the upper guide plate and the lower guide plate. It had been.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet feeding device that can reliably return reversely fed sheets between the lower guide plate and the third guide plate.

[Summary of the invention]

The paper sheet feeding device according to the present invention is configured such that a pinch roller is placed in circumferential contact with a platen, and the platen is rotated in the normal direction so that the paper sheet inserted between the platen and the pinch roller is fed in a predetermined direction. A main body of a feeding device is detachably attached to an office machine, and a plurality of sheets of paper at the inner magnetic end position of a plurality of sheets stacked and held in a paper holding section provided on the main body of the feeding device are transferred to the platen. and a pinch roller, and a sheet feeding mechanism that rotates the platen in the forward direction and guides the sheet from the upper surface side in the direction between the platen and the pinch roller when feeding the sheet to the sheet feeding mechanism. a lower guide plate which is provided at a distance below the upper guide plate and which guides the paper sheet from the lower surface side of the paper sheet to the platen and the pinch Ll-R; A 21'530 guide plate which is provided at a distance below the fire direction and forms a paper sheet storage section between the lower guide plate and the lower guide plate for storing the paper sheets when the platen is reversely rotated and the paper sheets are fed backwards. The lower guide plate is installed such that the extension line of the lower guide plate is located above the tip of the upper guide plate.

Therefore, since the lower guide plate is installed so that the extension line of the lower guide plate is located above the tip of the lower guide plate, the paper sheet storage area can be made wider and the paper sheets that are fed backwards can be reliably removed. It can be returned to the leaf storage section.

[Embodiments of the invention]

One embodiment of the present invention will be described with reference to FIGS. 2 to 10. FIG. 2 shows a state in which a sheet feeding device 12 is mounted on the top surface of an office machine 1 such as a printer or a typewriter. FIG. 3 is a longitudinal cross-sectional view showing the paper supply device 72 in relation to the office machine 1 side, with one (front side) side plate omitted.

As shown in FIG. 3, the office machine 11 includes a platen 13, a pinch roller 14 surrounding the platen 13, a mother guide 15 disposed along the outer periphery of the platen 13, and a pinch roller 14 surrounding the platen 13.
and a motor 16 for driving the platen 1.

On the other hand, the sheet feeding device 12 is provided with a detachable mounting base 18 at the bottom of the feeding device main body 17.

A platen gear 20 and a platen pulley 2 are attached to the shaft (f-ten shaft) 19 of the platen 13, and the motor pulley 22 on the motor 16 side is configured to drive the platen pulley 21 via a belt 23. .

The sample table 18 of the paper sheet feeding device 12 has legs 24 provided on the front left and right sides (only one side is shown) attached to a platen shaft 19.
It is mounted on the office machine 11 with one leg 24
A pair of upper and lower transmission gears 25 and 26 are provided, and the lower transmission 1° general wheel 26 is meshed with the platen gear 20.

Further, a passive gear 27 and a timing pulley 28 serving as one driving pulley are coaxially provided at the lower part of one side plate of the supply device main body 12, and the passive float 27 is meshed with the transmission gear 25. Further, a timing pulley 29 is provided at the front of one of the side plates, and a timing pulley 29 is provided on the left and right side plates (only one side is shown) of the supply device main body 17. It is provided with rotation levers 32a and 32b.
Both levers 32a and 82b have roller shafts 33 with both ends 9η1.
1 is rotatably supported. A pair of left and right separation rollers 34 and a timing pulley 35 as an operating rotating body are integrally attached to the roller shaft 33, respectively.

A timing belt 36 is wrapped around these timing pulleys 28, 29° 35, and the transmission float 25.
26 and a rotation transmission mechanism 37 (14). In the figure, 98a, 38b".

39a, 39b are rotating levers, 32a, 32b
The episode;! It is a straight horn R that should be limited within the iIl range.

The timing pulley 29 is rotatably supported by +111+51 supported between the left and right side plates.

A sheet receiving roller 52 is integrally attached to this iη1151.

Furthermore, cassette loading grooves 54 are provided on the inner surfaces of the left and right side plates (only one side is shown) of the feeding device main body 17, and paper sheet holding cassettes 55 as sheet holding portions are mounted in both loading grooves 54 relative to the feeding device main body 17. It is loaded upwards at a slightly backward angle.

The sheet holding cassette 55 has a sheet placing plate 56 therein, and the sheet placing plate 56 is rotatably supported at its upper edge inside the cassette 55. Paper sheets 57 of a predetermined size are stacked and held on the paper sheet mounting plate 56.

Further, the lower end of the paper sheet placement plate 56 is urged outward by a spring 58 from the lower surface side, but the maximum amount of rotation in the direction of the urging force is the surface of the uppermost sheet of the stacked and held paper sheets 57. It is configured such that it is restricted by bringing it into contact with a stopper 59.

Both rotating levers 32a, 32b and paper holding cassette 5
Reference numeral 5 indicates a system 1 in which the separation roller 34 can be selectively brought into contact with the lower surface of the uppermost sheet 57 by rotation of the rotation levers 32a and 32b. and each rotating lever 32a.

,? 2b is biased in the direction '1' by application springs 6'Oa and 60b, respectively, in the direction of pulling the separating roller 34 away from the surface of the sheet 57, and the stopper 38a.

It is held in contact with 38b.

Further, a stocker 63 is provided at a position in front of the groove 54 of the cassette device ji to receive the processed paper left 57 sent out from the cassette device ji. The sheet receiving roller 52 is attached to this stocker 6.
A reed and a receiving pinch roller 64 are circumferentially disposed at the lower position of 3.

In the figure, 651 indicates a plant gloss mechanism, and this plant gloss a
J'Jj,') 65 is composed of a planter 66 and a solenoid 67 ('i'j). By moving the plunger in the direction shown by the arrow in the figure, the υ rotation lever 3
2a and 32b are turned into paper sheets 57 and decoys. The energization of the plunger mechanism 65 is controlled by a control section 69 (ff, shown in FIG. 5) provided in the office machine 1).

Next, the control of the plunger mechanism by the control section 69 will be explained with reference to FIGS. 5 to 7. FIG. 5 is a diagram showing a control unit 69 on the office machine 11 side that controls the sheet feeding device 12. First, a format signal is input from a control unit (not shown) installed outside the office machine 1, and the
PU 7 o starts control according to the program in ROM 71 . Then, in order to feed paper, the input/output cupo door 2 is opened.
The sheet feed mite control signal is outputted to the one-shot multi 73 via. The one-shot multi 73 uses this signal to set the time magnet drive 7.
4, the solenoid 67 of the plunger mechanism 65 is energized, the silane gloss 66 is moved in the direction of the arrow in FIG. Let them come into contact with you. On the other hand, at the same time, a control signal is output to the platen motor 16-2 via the output cupboard door 2 and the platen drive 75.
Rotate in the opposite direction. Paper feeding will now start. This is the 6th
To explain in the figure, the CPU 70 first performs 1ff118 to check whether there is an error. This error is, for example, the absence of a primer or the presence of a covered cover. If an error occurs, the error lamp is turned on and a BUSY signal is output. There is no error, I
The controller performs 'jkl Kid' to determine whether or not there is data in the data buffer of the IC card M77.

Then, after performing the data selection, confirming that the paper is πa paper Kg L/ and performing the previous control, that is, the net feeder control. A signal is output to energize the solenoid 67 of the predetermined 11:i1. By rotating in the air direction, the uppermost flf
1 leaf 5y is platen J,? J, and the punch roller 14b. Both CPUs are)
0 Latin drive 75, f The platen 13 is rotated forward by a predetermined amount fj'Th (13 amounts) via the latte 7 motor 16. By this sinking, the paper sheet 57 is fed to the printing start position. Now, a display (T, O, F set) is shown on the RUM 77 indicating that the printing start conditions have been met, and printing is started. For example, when printing on the paper sheet 57 in two rows on the left and right, after printing on the left side, the paper sheet 57 must be reversely fed and returned to its original position (printing start f to 11''). That is, the CPU 70 rotates the platen 13 in a predetermined air path via the input/output cupboard door 2, the platen drive 75, and the platen motor 16.
No sort feeder control signal is output from U 70,
Solenoid 67 is not energized. Therefore, the branching roller 34 does not come into contact with the paper sheet 57 and no paper feeding is performed. After the sheet of paper 57 has been reversed to a predetermined position, the CPU
701d: Rotate the f Latin 13 in the forward direction to start printing on the right side. After the printing on the right side is completed, the sheet 57 is fed into the stocker 63.

From paper feeding to feeding to the stocker 63" -
The operation of the process will be explained using the time chart shown in FIG. First, the solenoid 67 is energized at time To, and 1・rescue time ΔT
)H34 and the platen 13 starts to rotate in reverse (T1
Time). The minute time ΔT delay was provided by solenoid 6.
Even if 7 is excited, the two separation rollers 34 do not always come into contact with the paper sheet 57 at the same time, but after the two separation rollers 34 are surely brought into contact with the paper sheet 57, the flatten 13 is reversed. This is for rotating. Then, at time T2, the platen 13 starts to rotate forward and feeds the paper sheet to a predetermined printing position. At this time, the solenoid 67 is in a state where it is excited for a minute time ΔT'. This is because, as shown in FIG. 4, when a sheet of paper 57 is fed, the sheet of paper 57 bent by the dividing roller 34 is bent, and this deflection causes the sheet of paper 57 to be transferred to the platen 13.
and the pinch roller 14b, thereby smoothing the feeding of the paper sheet 57. Therefore, if the separation roller 34 separates at the same time as the grating 13 rotates in the forward direction, the effect of deflection cannot be obtained, and there is a possibility that the paper cannot be fed smoothly. Therefore, as mentioned above, even if the platen 13 starts rotating forward, there will be a small time Δ
The τ solenoid 67 is energized to press the nine sheets 57 against the separation roller 34.

After the paper sheet 57 is sent to a predetermined printing position, printing on the left side is started (between T3 and T4). 0 after printing on the left side
Rotate the Latin 13 in the opposite direction and return the paper sheet 57 to the printing position (
between T4 and T5). At this time, the solenoid 67 is not excited. Then, printing is performed on the right side (between Ts and T6), and after the printing is completed, the sheet 57 is fed into the stocker 63 (between T6 and T7).

In Fig. 5, 78 is an interface, 79 is a carriage drive, 80 is a carriage motor, 8 is a ribbon drive, 82 is a ribbon motor, 83 is a hammer drive,
Reference numeral 84 indicates a hammer magnet, and reference numeral 85 indicates a DP switch.

As shown in FIGS. 8 and 9, the timing googly 35 is formed with a fan-shaped (for example, θ=120°) convex portion 86, and the roller shaft 33 is provided with a locking portion 87. It is set up. This is because when the platen 13 starts rotating forward after paper feeding ends, the solenoid 67 is energized for a minute time ΔT', as described above, and the fermentation roller 34 is in contact with the paper sheet. Therefore, if the separation roller 34 rotates (in the counter-feeding direction) at the same time as the platen 13 starts to rotate forward, there is a risk that the fed paper sheet 57 will return.In order to prevent this, the above-mentioned The protruding iyQ portion 86 and the locking portion 87 are provided to prevent the separation roller 34 from moving one file until the convex portion 86 comes into contact with the locking portion 87.

Next, the configuration of the portion that guides the sheet 57 during sheet feeding or reverse feeding will be explained with reference to FIG.

In the figure, reference numeral 88 indicates an upper guide plate that guides the paper sheet 57 from the upper side of the paper sheet 57 between the latin 13 and the pinch roller 14b.
It is curved to ft111. A lower guide plate 89 that guides the paper sheet 57 from the lower surface side is provided on the side facing the upper guide plate 88 and the paper sheet 57 between them. Additionally, a third guide plate 9° is provided between the lower guide plate 89 and the office machine 1), and a paper leaf storage is provided between the lower guide plate 89 and the paper leaf 57 that is fed backwards. 91 is formed. The extension line of the lower guide plate 89 is the upper guide plate 88.
It is located above the tip of the This is because the paper sheet storage section 91 is widened and the paper sheets 57 are reversely fed.
This is to ensure that the paper sheets are stored in the paper storage section 91 without returning between the upper guide plate 88 and the lower guide plate 89.

In FIGS. 3 and 4, reference numeral 92 indicates a receiving E-Δ guide, and reference numeral 93 indicates a printed body.

Next, the operation will be explained.

Paper sheets 57 of a certain size are stacked on the sheet mounting plate 56 of the sheet holding cassette 55, and the cassette 55 is inserted into the cassette loading groove 54.

When a predetermined operation is performed to feed the sheet 57, the solenoid 67 is energized and the motor 16 on the office machine 11 is activated to rotate the platen 13 in the reverse direction (rotation in the counterclockwise direction in FIG. 3). ) Dizzy. And platen car 20
The zero rotational force is transmitted to the passive gear 27 via the transmission i'i': i rli 26 , 25 . Further, the timing is 7° via the timing belt 36.
- Rotate the IJ 35 and 29 in the direction of 'rfl' in the figure. Then, as shown in Figure 21, the roller 34 applies pressure on the surface of the topmost paper sheet 57.
Due to the rotation of I'-ra 34, only one sheet of paper 57 is Jfy
The paper is taken out and supplied between the platen 13 and the pinch roller 14. At this time, since the platen 13 is rotating in the opposite direction, the paper sheet 57 that is IL-fed from above is not drawn between the platen 13 and the pinch roller 14, and the paper sheet 57 is not drawn between the platen 13 and the pinch roller 14. The 570F end is held at a fixed position where it touches the platen 13 and the pinch roller 14.

At this point, the above-mentioned mechanism 1 (*57IISl: the lower end is brought into contact with the platen 13 and the pinch roller 14, and the upper end is brought into contact with the separation roller 34]) 2 is prohibited from returning upward, and the center 813 is It has an elastic force that makes it slightly sagging and stretches up and down゛, :C-)? ] It is held in the 1 position.

When a process is performed on the paper blower 57, for example, an operation to start printing, the motor 16 moves to the platen 13.
514 in the direction of forward rotation, and the rotational force of the platen 13 is transmitted to the timing pulleys 29, 29 through the transmission gears 26, 25, the passive gear 27, and the timing belt 36.
? , 5, ÷--.

Therefore, the paper sheet 57 that has come into a standby state with its lower end in contact with the platen 13 and the pinch roller 14 is placed between the platen 13 and the pinch roller 14 when the platen 13 rotates.
When the platen 13 is rotated, the paper is drawn into the wave A guide 15 and wrapped around the outer periphery of the platen 13, and printing on the left side, for example, starts.

Thereafter, after the printing on the left side is completed, the platen 13 is reversely rotated and the sheet 52 is returned to the original printing start position.

At this time, the paper sheets 57 that are reversely fed are stored in the paper sheet storage section 91.
stored inside. Also, at this time, the solenoid 67 is not excited. When the paper sheet 57 returns to the predetermined position, the platen 13 (W, forward rotation υ1) is started and printing on the right side is started.

After printing is completed, the sheet is sent into the stocker 63 via the receiving wave/flat guide 92 and the receiving pinch roller 64.

As described above, according to this embodiment, the control unit 69
Solenoid 67 only rotates in reverse for the purpose of feeding paper.
is excited to bring the separation roller 34 into contact with the paper sheet 57. For example, when printing is performed separately on the left and right two stages, the platen 13 is rotated in the reverse direction after printing on the left side is completed, and the paper sheet 57 is reversely fed 9. In this case, the solenoid 67 is not energized and paper feeding is not started.

Therefore, it is possible to perform operations such as printing separately in two rows on the left and right, or returning the paper sheet 57 once sent in the printing direction to the printing start position again. and timing pulley 35
By providing a convex portion 86 on the roller 33 and a locking portion 87 on the roller 33, it is possible to prevent the rotation of the separating roller 34 (in the counter-feeding direction) at certain times when the platen 13 is rotated forward after paper feeding is completed. ) can be stopped, so the fed paper sheet 5
7 returns, there is no problem and it is reliably wound between the platen 13 and the pinch roller 14b. Furthermore, in the configuration of the part that guides the paper sheet 57 during paper feeding or reverse feeding, a lower guide plate 89 is provided so that its extension line is located above the tip of the upper guide plate 88, and a third guide plate Since the paper sheet storage section 9 formed between the paper sheet storage section 90 and the paper sheet storage section 90 is widened, for example, when the platen 13 is rotated in the reverse direction after printing on the left side and the sheet sheet 57 is reversely fed, the sheet sheet 57 can be securely transported. It can be stored in the paper sheet storage section 91.

[Effects of the Invention] The paper sheet feeding device according to the present invention allows the paper sheets inserted between the platen and the pinch roller to be fed in a predetermined direction by placing the pinch roller in circumferential contact with the platen and rotating the platen in the forward direction. A main body of a feeding device is detachably attached to an office machine configured to be attached to an office machine, and a plurality of sheets of paper are stacked and held in a paper holding section provided on the main body of this feeding device, and paper sheets are placed at the inner end position of the plurality of sheets. a paper feed mechanism that feeds the paper sheet between the platen and the pinch roller, and a paper feed mechanism that rotates the platen in the forward direction to feed the paper sheet to the paper feed mechanism, the top surface of the paper sheet in the direction between the platen and the pinch roller. an upper guide plate that guides from the side; a lower guide plate that is spaced apart below the upper guide plate and guides the paper sheet from the lower surface side of the paper sheet toward between the platen and the pinch roller; a third guide plate that is spaced apart from the lower guide plate and forms a paper sheet storage section that stores the paper sheets when the platen is reversely rotated and the paper sheets are fed backward; The lower guide plate is installed such that the extension of the lower guide plate is located above the tip of the upper guide plate.

Therefore, the lower guide plate is set so that the extension line of the lower guide plate is one line above the tip of the -L guide plate, so that the paper sheet storage area can be widened and the paper sheets cannot be fed backwards. To ensure that paper sheets that have been removed can be returned to a paper sheet storage section.

[Brief explanation of the drawing]

Figure 1 is a plan view of paper No. 21 showing the case of printing in two rows on the left and right, and Figures 2 to 10 are examples of the present invention.
Figure 2 is a diagram showing the paper sheet feeding device attached to the office machine, Figure 3 is a vertical cross-sectional view showing the paper sheet feeding device in relation to the office machine, and Figure 4 is an separated view of the i example. The same figure shows the state in which the roller is in contact with the uppermost sheet of paper, FIG. 5 is a diagram showing the configuration of the control section, and FIG. 6 is a diagram for explaining the control of the control section.
Figure 7 is a diagram for explaining the operation of the platen and solenoid, Figure 8 is a perspective view of the rotating lever and separation roller, etc., Figure 9 is a front view showing some details of Figure 8, and Figure 10. is a partial vertical sectional view of the vicinity of the platen. 11... Office machine, 12... Paper sheet feeding device, 13...
Platen, 14a, 14b...pinch roller, 88.
... Upper guide plate, 89... Lower guide plate, 90... Third guide plate.

Claims (1)

[Claims] An office machine configured so that a pinch roller is placed around the platen and the platen is rotated in the normal direction so that the paper sheet can be inserted between the 7" latin and the pinch roller and run in a predetermined direction. A main body of the feeding device is detachably attached to the main body of the feeding device, and the main body of the feeding device C is provided, and the paper sheets at the inner shell end position of several sheets stacked and held in the paper sheet holding section are attached to the platen. A paper feeding mechanism that feeds the sheet between the pinch roller and the flatten rotates forward to feed the nine sheets to the sheet feeding mechanism. an upper guide plate that guides the sheet; a lower guide plate that is spaced apart below the upper guide plate and guides the paper sheet from the lower surface side of the sheet toward between the platen and the pinch roller; and a third guide plate formed between the lower guide plate and the third guide plate to store the paper sheets when the platen is rotated in the reverse direction and the paper sheets are fed backwards, A paper sheet feeding device characterized in that the guide plate is installed such that the extension line of the lower guide plate is located above the tip of the lower guide plate.