JPS59185673A - Sheet supplying device - Google Patents

Abstract

PURPOSE:To unnecessitate an operation for separating a separating roller away from the surface of a sheet even when supplying the sheet, by a method wherein a shaft of a separating roller is supported by rotatable levers, an operating gear is fitted to the shaft, and an interlocking gear and a rotating cam are provided for the lever. CONSTITUTION:The rotating cam 47 is rotated through a one-way clutch 46, and only when the platen 13 is rotated reversely, the rotatable levers 32a, 32b are rotated to press the separating roller 34 against the surface of the sheet 57. By this, a rotating force of the platen 13 can be transmitted to the roller 34 irrespectively of the direction in which the platen 13 is rotated. By thus constituting, the construction can be simplified. In addition, since the roller 34 is pressed against the surface of the sheet 57 only when the platen 13 is rotated reversely, drawing-out and insertion of a sheet holding cassette 55 at the time of supplying the sheet or the like can be easily performed without requiring any operation for separating the roller 34 away from the surface of the sheet.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is detachably attached to an office machine such as a printer or a printer, and utilizes the rotational force of a platen provided on the office machine side. The present invention relates to a paper sheet feeding device that feeds paper sheets.

[Technical background of the invention]

2. Description of the Related Art Printers, tie writers, and the like are configured 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 stacked and held in the paper holding section are taken out one by one by a separating roller and placed between a platen and a pinch roller. However, while a sheet is being fed in a predetermined direction between the platen and the pinch roller, the next sheet is not fed from the sheet feeding device. On the other hand, it is desirable that the sheet feeding device is not provided with a drive source and that the rotational force of the platen on the office machine side is used to feed the sheets.

Therefore, when transmitting the rotational force of the platen to the separation roller on the sheet feeding device side, it is necessary to prevent the feeding operation by the platen and the sheet feeding operation by the separation roller from being performed at the same time. It has been proposed to transmit the rotational force to the separation roller only when the grating rotates in the reverse direction, and to feed the sheet between the graten and the pinch roller while rotating the graten in the reverse direction.

FIGS. 1 to 5 show examples of conventional devices developed based on this idea.

In the figure, reference numeral 1 denotes a passive rotating body provided on the side of the sheet feeding device, which is driven in conjunction with the platen by a common drive source. Further, reference numeral 2 denotes a cam plate mounted on a shaft 3 common to the passive rotating body 1, and the rotational force of this cam plate 2 is transmitted to the separation roller on the sheet feeding device side. An engaging piece 4 is rotatably supported on the passive rotating body 1.

The cam plate 2 has an engagement recess 5 in a part thereof, and a swinging piece 6 is pivotally supported in the vicinity of the engagement recess 5 . Swing piece 6
The spring 7 has one end brought into contact with the cam surface of the cam plate 2, and the other end covers the engagement opening 5. Further, the engagement piece 4 has an engagement pin 8 at its rotating end, and a spring 9 causes the locking pin 8 to come into contact with the cam surface and the outer surface of the swinging piece 6.

Therefore, in order to rotate the separation roller on the sheet feeding device side by the drive source for driving the platen on the office machine side, the passive rotating body 1 is first rotated in the direction of the arrow as shown in FIG. The rotational direction of the drive source at this time is the direction in which the platen is rotated in the opposite direction.

As the passive rotating body 1 rotates, the engagement pin 8 moves from the cam surface of the cam plate 2 to the outer surface of the swinging piece 6, and the position of the locking pin 8 exceeds the fulcrum position of the swinging piece 6. The pressing force of the engagement pin 8 by the barbs 9 overcomes the spring 7, causing the swinging piece 6 to swing as shown in FIG. 2, so that the other end of the swinging piece 6 comes into contact with the cam surface.

When the passive rotating body 1 further rotates in the same direction and the locking pin 8 moves from the swinging piece 6 to the cam surface as shown in FIG.
is returned to its original position by spring 2 again.

When the rotational direction of the drive source is changed and the passive rotating body 1 is slightly rotated in the opposite direction (the direction in which the platen is rotated forward), the retaining pin 8 is moved into the engagement recess 5 of the cam plate 2 as shown in FIG.
It will fall into.

Next, when the rotational direction of the drive source is switched again and the passive rotary body 1 is returned to the initial rotational direction, the passive The rotating body 1 and the cam plate 2 rotate together, the rotational force of the cam plate 2 is transmitted to the separation roller on the paper sheet feeding device side, and the rotation of the separation roller feeds the paper sheets to the office machine side. become.

[Problems with background technology]

As described above, in the conventional device that feeds paper sheets using a drive source for driving the platen on the office machine side, the separation roller is rotated only when the platen is rotated in the reverse direction. ．． Engagement piece 4. Swing piece 6
In addition, the rotational direction of the drive source must be changed over and over again, and the control system of the office machine that controls the drive source is also complicated.

Furthermore, it is necessary to replenish the sheet feeding device with sheets with the separating roller separated from the surface of the sheet, but this operation also has to be performed as a separate operation, which is troublesome.

[Purpose of the invention]

The present invention was made based on these circumstances, and
The purpose of this is to use an extremely simple configuration to feed paper sheets by transmitting the rotational force of the platen on the office machine to the separation roller, and to supply paper sheets without the need for troublesome operations when replenishing paper sheets, etc. The goal is to provide equipment.

[Summary of the invention]

The present invention provides a paper sheet feeding device that feeds paper sheets to an office machine using the rotational force of a platen on the office machine, in which the roller shaft of a separation roller is supported by a rotary lever, and the roller shaft is An operating gear is attached to the rotary lever, and an interlocking gear that meshes with the operating gear and a rotating cam coaxial therewith are provided on the rotating lever.Furthermore, a cam engaging member is provided on the feeder main body 1, and this member is connected to the rotating cam. The rotational force of the platen is transmitted to the operating gear or the interlocking gear by a rotation transmission mechanism, and only when the platen rotates in the opposite direction, the rotational force of the interlocking gear is transmitted through the one-way clutch to the rotating cam. As the rotating cam rotates, the rotating cams rotate back and forth, and while the separation roller is in contact with the sheet surface, the rotational force of the separation roller separates the sheet. This is characterized in that the supply operation is performed repeatedly.

[Embodiments of the invention]

Figures 6 to 9 show an embodiment of the present invention,
FIG. 6 shows a state in which a sheet feeding device 12 is attached to the top surface of an office machine 11 such as a printer or a paper writer. The paper sheet supply device N12 is detachable from the office machine 11. Further, FIG. 7 is a longitudinal cross-sectional view showing the sheet feeding device 12 in relation to the office machine 11 side, with one (front side) side plate omitted.

As shown in FIG. 7, the office machine 11 includes a platen 13 and a pinch roller 14 surrounding the platen. It includes a <-A guide 15 disposed along the outer periphery of the platen 13, a motor 16 for driving the platen, and the like.

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 grating gear 20 and a platen pulley 2 are attached to the shaft (platen shaft) 1g of the platen 13, and the motor pulley 22 on the motor 16 side is configured to drive the platen drive 21 via a belt 23. .

The mounting base 18 of the sheet feeding device 12 has legs 24 provided on the front left and right sides (only one side is shown) connected to the 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 gear 26 meshes with the platen gear 2θ.

Further, a passive gear 27 and a timing pulley 28 are coaxially provided at the lower part of one side plate of the supply device main body 17, and the passive gear 27 is meshed with the transmission gear 25. Furthermore, timing pulleys 29 and 30 are provided at the front and center portions of one of the side plates, respectively.

Left and right side plates of trench supply device main body 17 (only one side is shown)
A rotating shaft 31 is supported at both ends. Rotating levers 32a are provided at both ends of this rotating shaft 31, respectively.

32b is fixed as shown in FIG. 8, and both levers 32a.

A roller shaft 33 is rotatably supported at both ends of the roller shaft 32b. A pair of left and right separation rollers 3 are provided on this shaft 33.
A timing pulley 35 is integrally attached to each of the 4 and one end sides. A timing belt 36 is attached to these timing pulleys 2B, 29, 35°30.
The rotation transmission mechanism 37 is constructed together with the transmission gears 25 and 26. In addition, 41 in Fig. 7 is the spring 4.
This is a tension pulley that is pressed against the back surface of the belt 36 by the elasticity of the belt 36.

A small diameter operating gear 44 is attached to one end of the roller shaft 33 integrally with the timing pulley 35.

Further, a large-diameter interlocking gear 45 that meshes with an operating gear 44 is pivotally supported on one of the rotating levers 32a. Furthermore, a rotating cam 46 is provided coaxially with the interlocking gear 45, so that when the interlocking gear 45 rotates clockwise in FIG. It is composed of The rotating cams 47 have radius dimensions that differ by about 180'', with approximately half of the outer periphery being a long radius portion 47a, and the other half being a short radius portion 47b.

On the other hand, the supply device main body 17 has an f-
48 is rotatably provided. A spring hook provided on a part of the rotating cam 47 connects the pin 49 and the pulley 4.
A return spring 50 is hung between the shaft of 8 and the spring 50.
The annular cam surface, that is, the outer periphery of the rotating cam 47 is constantly pressed against the outer periphery of the pulley 48, and the rotating cam 47
is elastically held at a certain position, and in this state, the rotating cam 47
The terminal end of the short radius portion 47b is configured to be in contact with the pulley 48.

The timing pulley 29 is rotatably supported by a shaft 51 supported between left and right side plates. And this axis 51
A paper sheet receiving row 252 is integrally attached to the , and a one-way clutch 53 is provided at one end of the coaxial shaft 51. This one-way clutch 53 is connected to the timing pulley 29
When the timing pulley 29 rotates counterclockwise in FIG. 7, the rotational force is transmitted to the sheet receiving row 252 via the shaft 5, but when the timing pulley 29 rotates clockwise, the rotational force is not transmitted.

In addition, 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 installed in both loading grooves 54. On the other hand, it is loaded from above 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. And this #,
Paper leaves 57 of a certain size are stacked and held on the leaf placement plate 56. Further, the lower end of the paper sheet placement plate 56 is biased outwardly by a spring 58 to force the lower surface side. It is configured to be restricted by bringing the surface of the object into contact with the stopper 59.

Both rotating levers 32a, 32b and paper holding cassette 5
5 is such a relationship that the separation roller 34 can be brought into selective contact with the lower surface of the uppermost sheet 57 by rotation of the rotation levers 32a, 32b.

Further, in a position in front of the cassette loading groove 54, a stocker 63 is provided for receiving processed paper sheets 57 sent out from the office machine 1 side.

The sheet receiving roller 52 is located at a lower position of the stocker 63 and has a receiving pinch roller 64 in contact therewith.

Note that 65 and 66 in FIG. 7 are a supply page guide and a receiving vapor guide provided at the lower part of the supply device main body 17. The supply wave guide 65 guides the nine sheets of paper 57 taken out by the separating roller 34 between the platen 13 and the pinch roller 14 on the office machine 11 side, and the receiving paper guide 66 guides the nine sheets 57 taken out by the separation roller 34 between the platen 13 and the pinch roller 14 on the office machine 11 side. The processed paper sheet 57 sent out from the paper sheet receiving roller 52
and the receiving pinch roller 64 from below. In addition, at the lower end of the back plate of the cover 63,
A single sheet insertion guide 67 is provided which leads from the inside of the stocker 63 to the supply wave=Δ guide 65 .

Next, the operation will be explained.

First, sheets 57 of a certain size are stacked on the sheet placement plate 56 of the sheet holding cassette 55, and the cassette 55 is inserted into the cassette loading groove 54 to create the state shown in FIG.

Therefore, when a predetermined operation for feeding paper sheets 57 is performed, the motor 16 on the office machine 11 side is activated to rotate the platen 13 in the reverse direction (counterclockwise rotation in FIG. 7). The rotational force of the platen gear 20 is transferred to the transmission gear 26.
．． 25 and is transmitted to the driven gear 27. Then, the timing pulley 29°35.30 is further rotated clockwise in the figure via the timing belt 36, and the rotational force of the timing pulley 35 is transferred to the operating gear 44. It is transmitted to rotating cam 47 via interlocking gear 45 and one-way clutch 46 .

As a result, the rotating cam 47 rotates counterclockwise in the figure. At this time, the long radius portion 47a of the rotating cam 47 is connected to the pulley 48.
7, the pivot levers 32h and 32b pivot to the right in FIG. Side separation roller 3
4 is pressed against the surface of the paper sheet 570 at the top position as shown in FIG.
While the long radius portion 47a of the rotating cam 47 is in contact with the pulley 48, 91 sheets of paper 57 are taken out by the rotation of the separation roller 34, and passed through the supply vapor guide 65 to the grating 1.
3 and the pinch roller 14.

At this time, the platen 13 is rotating in the opposite direction, so the paper sheet 57 fed upward is not drawn into between the grating 13 and the pinch roller 14, and the lower end of the paper sheet 57 is not connected to the platen 13. It is held at a fixed position in contact with the pinch roller 14.

On the other hand, when the rotating cam 47 has rotated about 1800 times, the short radius portion 47b is brought into contact with the pulley 48.
At this time, the rotating levers 32g and 32b rotate to the left in FIG. 7 to separate the separation roller 34 from the surface of the sheet 57.

Next, when processing is performed on the paper sheet 57, for example, an operation to start printing is performed, the motor 16 is driven in the direction of forward rotation of the platen 3, and the rotational force of the platen 13 is transferred to the transmission gear 26, 25 and the passive gear 27. and is transmitted to the timing pulleys 30, 35, 29 via the timing belt 36.

The paper sheet 57, which was in a waiting state with its lower end in contact with the platen 13 and the pinch roller 14, is drawn between the platen 13 and the pinch roller 14 at the same time as the platen 13 starts to rotate. The paper is fed along the vane e-guide 15 so as to wrap around the outer periphery of the platen 13.

At this time, the rotational direction of the timing pulley 30 is in the opposite direction to the one-way clutch 46, so the rotational force of the interlocking gear 45 is not transmitted to the rotating cam 47. and,
Since the separating roller 34 is spaced apart from the surface of the sheet 57, the next sheet is fed while the platen 13 rotates forward, even though the rotation direction of the separating roller 340 is opposite to the sheet feeding direction. It won't happen.

On the other hand, the paper sheets 57 processed in the office machine 11 are guided through the receiving paper guide 66 between the paper sheet receiving row 252 and the receiving pinch rollers 64; Since the rotational force from the platen 13 side is transmitted via the directional clutch 53, and the direction of rotation is to send the paper sheets 57 upward, the paper sheets 57 are sent out from the office machine 11 side through the receiving paper guide 66. The paper sheet 57 is drawn between the paper sheet receiving roller 52 and the receiving pinch roller 64, and is sent upward and stored in the stocker 63.

Therefore, according to the sheet feeding device configured in this way, the rotary cam 47 is rotated via the one-way clutch 46, and the rotary lever 32 is rotated only when the platen 13 rotates in the reverse direction.
Since the separation roller 34 is brought into pressure contact with the surface of the sheet 57 by rotating IL, 32b, when the flatten 13 rotates in any direction, the rotational force is transferred to the separation roller 23.
It can be transmitted to 4. By adopting such a structure, a complicated mechanism as shown in FIGS. 1 to 5 is not required, and a simple structure can be obtained.

In addition, since the separation roller 234 does not come into pressure contact with the surface of the paper sheet 57 unless the platen 13 is rotated in the reverse direction, the separation roller 34 must be pulled out and inserted separately when the paper sheet holding cassette 55 is pulled out and inserted when replenishing paper sheets, etc. without any release operation.
You can go there easily.

Note that the present invention is not limited to the above embodiments. For example, in the embodiment described above, a mechanism using gears and belt transmission is employed as the rotation transmission mechanism 37, but the rotation transmission mechanism is not limited to this, and may be configured using only gears, for example.

〔Effect of the invention〕

As described in detail above, the present invention provides a paper sheet feeding device that feeds paper sheets to an office machine using the rotational force of a platen on the side of the office machine, in which the roller shaft of the separation roller is rotated by a rotating lever. In addition to supporting the roller shaft, an operating gear is attached to the roller shaft, and the rotating lever is provided with an interlocking gear that meshes with the operating gear and a rotating cam that is coaxial with the interlocking gear, and furthermore, a cam engagement member is provided on the supply device main body 1. A lever member is brought into contact with the annular cam surface of the rotary cam, and a rotation transmission mechanism transmits the rotational force of the platen to the operating gear or the interlocking gear, so that the rotational force of the interlocking gear is transferred in one direction only when the platen rotates in the opposite direction. The rotation lever is configured to rotate back and forth as the rotating cam rotates, and while the separating roller is in contact with the sheet surface, the rotation of the separating roller is transmitted to the rotating cam via a clutch. It is characterized in that the paper sheet feeding operation is performed by force.

Therefore, with an extremely simple configuration, the rotational force of the platen can be transmitted to the separation roller to feed paper sheets, and the separation roller is pressed against the surface of the paper sheet only when the platen rotates in the opposite direction. , it is possible to obtain excellent effects such as no special operation required to separate the separation roller from the surface of the paper sheets when replenishing paper sheets, etc.

[Brief explanation of the drawing]

Figures 1 to 5 are plan views showing a conventional example, Figures 6 to 9 show an embodiment of the present invention, and Figure 6 shows a state in which a paper sheet feeding device is installed in an office machine. Perspective view shown, No. 7
The figure is a longitudinal sectional view showing the paper sheet feeding device in relation to an office machine.
FIG. 8 is a schematic perspective view showing the relationship between the rotary lever and the crank, and FIG. 9 is a schematic sectional view showing the paper sheet feeding operation state. 11... Office machine, 12... Paper sheet feeding device, 13...
・Platen, 14...Pinch roller, 32g, 32b
... Rotation lever, 34 ... Separation roller, 37 ... Rotation transmission mechanism, 44 ... Operating gear, 45 ... Interlocking gear, 46 ... One-way clutch, 47 ... Rotating cam, 4
8... Pulley (cam engagement member), 50... Return spring, 55... Paper sheet holding cassette (paper sheet holding section), 57.
...Paper leaf. Applicant's representative Patent attorney Takeshi Suzue Syllable 1 Figure 2 Figure 3 Mouth Figure 4

Claims (1)

[Claims] A pinch roller is placed around the platen, and by rotating the platen in the normal direction, it is inserted between the jig grating and the pinch roller and can be detachably attached to an office machine configured to feed nine sheets of paper in a predetermined direction. A feeding device main body to be mounted, a rotation lever rotatably provided on the feeding device main body,
This rotary lever is pivotally supported, and when the rotary lever rotates in one direction, it comes into pressure contact with the surface of the outermost sheet among the multiple sheets stacked and held in the sheet holder and rotates in a predetermined direction. a separation roller that feeds the paper sheet at the extreme end position between the platen and the pinch roller; an operating gear that rotates together with the separation roller; and a rotary lever that is pivotally supported so as to mesh with the operating gear. a rotational force transmission mechanism that transmits the rotational force of the grating to one of the operating gears, a rotary cam coaxially provided with the interlocking gear, and a platen that rotates in the opposite direction. a one-way clutch that transmits the rotational force of the interlocking gear to the rotary cam only when the rotational gear is rotated, and the rotary lever that is provided on the supply device main body so as to come into contact with the annular cam surface of the rotary cam as the rotary cam rotates. a cam engaging member that rotates back and forth to temporarily hold the separating roller in a position where it is brought into pressure contact with the sheet surface; and a cam engaging member that holds the rotating cam in a constant position to separate the separating roller from the sheet surface. A paper sheet feeding device comprising: a return spring that elastically holds the rotary lever in a position where the rotary lever is rotated.