JPH10291679A - Paper feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use an operating lever, enable a paper feed roller shaft to move manually positively, in this way release a meshing condition of a paper feed gear with a power transmitting gear, also spread a space between a paper feed roller and a paper guide material, even in the case of paper firmly jammed, make easily removing possible of the jammed paper. SOLUTION: In one side wall 23 of a frame, a slot 30 is provided, also a base part of an operating lever 33 is turnably journalled. One end of a paper feed roller shaft 25 is inserted in the slot 30, to be rotatably journalled to the operating lever 33, also in a tip end thereof, a paper feed gear 43 is provided, the other end of the paper feed roller shaft 25 is rotatably journalled to the other side wall 22 of the frame, in the operating lever 33, a lever spring 48 is provided, which energizes the paper feed gear 43 in a direction meshing with a power transmitting gear 47. The operating lever 33 is turned against energizing of the lever spring 48, meshing of the paper feed gear 43 with the power transmitting gear 47 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder having a function for releasing a paper jam in a printer or the like when the paper jam occurs.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. Sho 62-180541 discloses a paper feeder in a printing apparatus in which a rotary shaft of a platen is fitted and supported in a bearing hole formed in an apparatus main body.
This device includes a print head, a head pressing spring that presses the print head against the platen, and a transmission gear mechanism that transmits the rotational force of the motor to the platen, and the bearing hole is driven by a gear fixed to the platen. It is a long hole extending to a position where the gear is disengaged from the gear on the side, and a rotating shaft pressing spring that urges the rotating shaft of the platen in the gear meshing direction is provided.

When the printing paper is wound around the platen to cause jamming, when the rear end of the printing paper is pulled, the rotation shaft of the platen is opposed to the other end of the elongated hole against the urging of the rotation shaft pressing spring. And the meshing state between the gear fixed to the platen and the gear on the driving side is released. As a result, the platen is in a free state, and the paper in the jamming state can be removed from the platen.

However, the paper jam release mechanism directly removes the paper jam by directly pulling the print paper in the jammed state. Therefore, when the jammed state is severe and the paper is tightly jammed, the platen is pulled by pulling the paper. There is a problem that it is difficult to set the free state, and it is difficult to remove the paper.

Further, by rotating the release lever, the meshing state between the power transmission gear and the paper feed gear fixed to the end of the paper feed shaft provided with the paper feed roller is released, and the occurrence of paper jam is reduced. A paper feeder for preventing the occurrence is disclosed in JP-A-7-276.
No. 720. However, what is moved by the rotation of the release lever is on the power transmission gear side, and is applied only to a device having an idle gear, not a paper feed shaft having a paper feed roller.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper feeder in which a paper feed roller shaft can be manually and positively moved by using an operation lever, whereby a meshing state between a paper feed gear and a power transmission gear can be achieved. And the gap between the paper feed roller and the paper guide member is enlarged so that even if the paper is firmly jammed, the jammed paper can be easily removed.

[0007]

The paper feed roller shaft has a paper feed roller for feeding the paper. The frame on which this is mounted may be any as long as it supports the end of the paper feed roller shaft. It is more preferable that the frame also serves as a paper guide, for example. One end of the paper feed roller shaft is movably disposed with respect to one side wall of the frame, and the other end of the paper feed roller shaft is pivotally supported on the other side wall of the frame. According to this configuration,
By manipulating one end of the paper feed roller shaft, the paper feed roller shaft can be tilted.

The above configuration can be configured as follows. An opening is provided on one side wall of the frame, a bearing member is movably arranged facing the opening, and one end of the paper feed roller shaft is supported by the bearing member, and one end of the paper feed roller shaft is connected to the frame. Is arranged movably with respect to one of the side walls. A support shaft is provided on one side wall of the frame, and a bearing member is rotatably supported on the support shaft. The rotation of the bearing member tilts the paper feed roller shaft. The bearing member may be formed integrally with an operation lever for rotating the bearing member. A paper feed gear is provided at one end of the paper feed roller shaft, and is configured to mesh with a power transmission gear that drives the paper feed gear.By moving one end of the paper feed roller shaft, the engagement between the paper feed gear and the power transmission gear is established. To release. The bearing member may be biased in a direction in which the paper feed gear meshes with the power transmission gear side, and the bearing member may be configured to be rotatable against the biasing force by the operation lever. One end of the lever spring is locked to the operation lever, and the other end of the lever spring is locked to and biased on one side wall of the frame.

The paper feed gear receives power from the power transmission gear, and the paper feed roller shaft rotates integrally with the paper feed gear via the shaft support portion of the operation lever and the shaft support portion of the other side wall of the frame. Paper is fed by rollers.

When a paper jam occurs during paper feeding, the operation lever rotates against the bias of the lever spring. Then, one end of the paper feed roller shaft pivotally supported by the bearing member moves rotationally with the operation lever and moves within the opening provided in the frame, and one end of the paper feed roller shaft moves upward around the bearing portion at the other end. The paper feed gear and the power transmission gear are released from engagement with each other. As a result, the paper feed roller shaft becomes free from the power transmission gear, and the interval between the paper feed roller and the paper guide increases, so that the jammed paper can be easily removed.

As described above, the gist of the present invention is to move one end of the paper feed roller shaft to incline the roller shaft. At the same time, the engagement between the paper feed gear and the power transmission gear is released, the paper feed gear is urged toward the power transmission gear, or one end of the paper feed roller shaft is moved by the operation lever. There is.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a printer 1 according to an embodiment to which the present invention is applied, which is viewed from a substantially front side. The printer 1 includes a main body frame 2 that forms an outer shape of the printer 1. A cassette mounting frame 3 is provided on the upper front portion of the main body frame 2, and an ink ribbon cassette 4 is mounted on the upper surface of the cassette mounting frame 3. An upper frame 5 is mounted on an upper portion of the body frame 2 in the front-rear direction, and a printing unit 6 (not shown in FIG. 1) is provided below the upper frame 5. On the side, a platen plate 7 is disposed facing up and down. At the rear of the main body frame 2, a paper feeder 8 for feeding paper toward the printing unit 6 is provided.

FIG. 2 is a perspective view of the printer 1 with the cassette mounting frame 3, the ink ribbon cassette 4, and the upper frame 5 shown in FIG. 1 removed. The body frame 2 includes a left side frame 9 forming left and right sides,
It has a right side frame 10 and a base frame 11 forming a bottom.

In the center of the front part of the base frame 11, a drive motor M1 is disposed with its motor shaft 12 directed rightward. The distal end of the motor shaft 12 is extended to be supported near the front end of the right side frame 10, and a worm 13 is fixed in the middle of the motor shaft 12.

On the right side of the base frame 11, a wheel train mechanism 14 composed of a plurality of gear trains is horizontally arranged along the surface of the base frame 11 from the front to the rear. The power is transmitted to the wheel train mechanism 14.

The carriage shaft 15 extends horizontally in the left-right direction of the printer 1 between the middle rearward portion of the left side frame 9 and the middle rearward portion of the right side frame 10.
And a carriage sub-shaft 16 parallel to the carriage shaft 15 is provided between the middle front portion of the left side frame 9 and the middle front portion of the right side frame 10.
Is laid horizontally.

A platen plate 7 extends vertically between a rear middle position of the left side frame 9 and a rear middle position of the right side frame 10, and is provided on a front surface of the platen plate 7 facing the vertical direction. Is provided with a platen portion 17 in the left-right direction.

A lower portion of a rear portion of a carriage 19 on which a print head 18 is mounted is slidably fitted to the carriage shaft 15, and a lower portion of a front portion of the carriage 19 is slidably supported by the carriage sub-shaft 16. The carriage 19 is disposed so as to be able to reciprocate in the horizontal direction of the printer 1 in a horizontal state. On the base frame 11,
A carriage drive mechanism 20 for reciprocating the carriage 19 in the left-right direction of the printer 1 is provided below the movement locus of the carriage 19.

The print head 18 is mounted on a carriage 19 such that the head 18a at the front end faces the platen 17 from the front. The printing unit 6 includes a print head 18, a carriage 19, and a platen unit 17.

In the middle of the rear part of the base frame 11 on the rear side of the platen plate 7, a paper guide frame 21 constituting a main part of the paper feeding device 8 is mounted on the base frame 11 along the left-right direction of the printer 1. Have been.

Next, the sheet feeder 8 will be described.
FIG. 3 is a perspective view of the sheet feeder 8, and FIG. 4 is a cross-sectional view of a main part of FIG. As shown in FIG. 3, the paper guide frame 21 includes a left side wall 22, a right side wall 23, and a paper guide portion 24 provided integrally between a lower portion of the left side wall 22 and a lower portion of the right side wall 23.
The paper feed roller shaft 25 is disposed above the paper guide unit 24 in the left-right direction of the printer 1, and a paper feed roller 26 is provided in the middle of the paper feed roller shaft 25.

Further, as shown in FIG.
The upper surface 24 a of the fourth roller 4 is formed as a concave curved surface along the peripheral surface of the paper feed roller 26. A window hole 27 is provided in the center of the paper guide portion 24 in the left-right direction. In the window hole 27, a pressure contact roller 28 that presses against the paper feed roller 26 from substantially below is disposed. Although not shown, the pressing roller 28 has shaft portions at both ends, and the shaft portions at both ends are rotatably supported by elastic support members mounted on the base frame 11. Further, FIG.
As shown in FIG. 4 to FIG. 4, a sheet guide plate 29 made of a thin metal plate is mounted along the left and right direction of the sheet guide section 24 at a lower portion outside the front part of the sheet guide section 24.

As shown in FIG. 3, the paper guide frame 2
In the central portion of the right side wall 23 of the first embodiment, there is a long hole 3 which is directed substantially vertically.
An opening made of zero is provided. One end of the paper feed roller shaft 25 passes through the long hole 30. A left bearing 32 having a shaft hole 31 is provided at the center of the left wall 22 of the paper guide frame 21. The other end of the paper feed roller shaft 25 is inserted into the left bearing 32 and rotatably supported. ing. On the outer surface of the right side wall 23, there is provided an operation lever 33 which is rotated to release a paper jam. Note that the paper guide frame 21 is made of synthetic resin, and the left side wall 2 that supports the other end of the paper feed roller shaft 25.
2 is capable of elastic deformation.

FIG. 5 is a side view of the sheet feeder 8 as viewed from the direction of arrow A in FIG. 3, and FIG. 6 is a perspective view showing the outer surface of the right side wall 23 of the sheet guide frame 21. Right side wall 2
A column-shaped support shaft portion 34 is provided near the rear edge in the middle of the outer surface of the outer wall 3, and a spring retaining projection 35 is provided near the front edge of the upper outer surface of the right side wall 23.

FIG. 7 shows the operation lever 3 partially broken away.
3 is a perspective view of FIG. The operation lever 33 is a plate-shaped lever body 36 disposed vertically along the outer surface of the right side wall 23 of the paper guide frame 21, and extends from the upper edge of the lever body 36 toward the front side of the lever body 36. Operation unit 3
7 is provided.

Near the lower front edge of the lever body 36, a right bearing 39 having a shaft hole 38 is provided. The lever body 36 also serves as the bearing member according to claim 2, which supports one end of the paper feed roller shaft 25. Near the lower rear edge of the lever main body 36, a shaft hole 40 serving as a rotation center of the operation lever 33 is provided, and near the upper rear edge on the front side of the lever main body 36, a spring retaining portion 41 is protruded. ing. The operation unit 37 is partially broken in the left-right direction in FIG. 7, and a finger-hook portion 42 having a convex cross-sectional shape is formed at an upper rear portion thereof.

As shown in FIG. 5, the operation lever 37 has a shaft hole 40 of the lever main body 36 inserted into a support shaft portion 34 provided on the outer surface of the right side wall 23 of the paper guide frame 21. It is supported rotatably. Further, as shown in FIG. 3, the right bearing 3 provided on the lever main body 36 is provided.
9 is inserted into a long hole 30 provided in the right side wall 23. One end of the paper feed roller shaft 25 passes through the elongated hole 30 and is inserted into the right bearing 39 of the lever body 36, and is rotatably supported by the operation lever 37. The tip of one end of the paper feed roller shaft 25 protrudes from the front side of the lever body 36, and the tip of the paper feed gear 4
3 is fixed. The paper feed gear 43 is formed of a large-diameter bevel gear.

As shown in FIG. 3, the paper guide frame 2
A support shaft 44 is erected on the base frame 11 (not shown) outside and below the right side wall 23. Below the support shaft 44, a third transmission gear 45 constituting one gear of the wheel train mechanism 14 described later is rotatably supported. The third transmission gear 45 is a gear for transmitting power to the paper feed gear 43 of the paper feed device 8.

A ratchet wheel 46 is rotatably provided in the middle of the upper support shaft 44 of the third transmission gear 45, and a small bevel gear is provided integrally with the ratchet wheel 46 above the support shaft 44 above the ratchet wheel 46. 47 is provided rotatably. The paper feed roller shaft 25 is
The paper feed roller shaft 25 is disposed in the left-right direction of the printer 1 orthogonal to the axes of the transmission gear 45 and the small bevel gear 47.
A paper feed gear 43 (large bevel gear) provided at one end of the small bevel gear 47 is meshed with the small bevel gear 47. The power transmission gear according to the first aspect is constituted by a small bevel gear 47.

A spring clutch (not shown) is provided between the third transmission gear 45 and the ratchet wheel 46. The rotation of the ratchet wheel 46 is performed by a stopper operated by a solenoid (not shown). Is prevented, the spring clutch slips, and the transmission of the rotational force from the third transmission gear 45 to the small bevel gear 47 is interrupted.

As shown in FIG. 5, the paper guide frame 2
One end of a lever spring 48 is hooked on a spring hooking projection 35 provided on the right side wall 23 of the first unit 23, and the other end of the lever spring 48 is hooked on a spring hooking portion 41 provided on the lever body 36. The operation lever 33 is urged in a rotation direction in which the paper feed gear 43 pivotally supported by the right bearing 39 of the operation lever 33 meshes with the small bevel gear 47.

As shown in FIGS. 3 and 5, when the paper feed gear 43 and the small bevel gear 47 are engaged (normally), the paper feed roller shaft 25 is supported at one end. The right bearing portion 39 of the operating lever 33 is located at the lower end of the long hole 30 provided in the right wall 23.

Next, the wheel train mechanism 14 will be described. FIG. 8 is a perspective view of a main part of the printer 1 mainly showing the gear train mechanism 14. In FIG. 8, the paper guide frame 21
The operation lever 33 provided on the right side wall 23 is not shown.

The wheel train mechanism 14 includes a first transmission gear 50 rotatably provided on a support shaft 49 erected near the right front portion of the base frame 11, and a base frame 11 behind the first transmission gear 50. A carriage driving gear 52 rotatably provided on a first short shaft 51 erected on the base frame 11 and a second carriage driving gear 52 erected on the base frame 11 behind the carriage driving gear 52.
A second transmission gear 54 rotatably provided on the short shaft 53,
A third transmission gear 45 rotatably provided on a support shaft 44 erected on the base frame 11 behind the second transmission gear 54.
It is composed of

The worm 13 fixed to the motor shaft 12 of the drive motor M1 meshes with a worm wheel 55 provided at the tip of the first transmission gear 50, and is provided below the first transmission gear 50. A drive gear 57 of the carriage drive gear 52 meshes with the large diameter gear 56. A second transmission gear 54 meshes with a drive gear portion 57 of the carriage drive gear 52, and the second transmission gear 5
4, the third transmission gear 45 is meshed.

Although a detailed description is omitted, a small diameter gear portion 58 is provided at an intermediate portion of the first transmission gear 50. The small-diameter gear portion 58 is a gear portion for branching and transmitting power to the ribbon feed mechanism 59, and the first transmission gear 5
The gear is meshed with a large-diameter gear portion 62 below a fourth transmission gear 61 rotatably supported on a shaft 60 erected on the base frame 11 on the left side of 0. Also, the fourth transmission gear 61
Is meshed with the drive gear 65 of the ribbon feed gear 64. Ribbon feed gear 6
4 has the drive gear unit 65 integrally at the lower end of the ribbon feed shaft 66.

As shown in FIG. 2, the carriage drive gear 52 has the drive gear portion 57 at the lower part in the axial direction and the carriage drive pulley 67 at the upper part in the axial direction. The base frame 1 on the left of the first short axis 51
A pulley shaft (not shown) composed of a short shaft is erected near the left side of the center of the intermediate portion 1, and a driven pulley 69 is rotatably supported on the pulley shaft.

A drive belt 70 composed of a timing belt is wound horizontally between the carriage drive pulley 67 of the carriage drive gear 52 and the driven pulley 69. A carriage drive pin 71 is fixedly mounted on the outer peripheral surface of the drive belt 70 with the tip facing upward. The tip of the carriage drive pin 71 is provided on the right side of the carriage in the front-rear direction of the carriage. It is inserted into an engagement hole 72 formed of a long hole. The carriage drive mechanism 20 includes a carriage drive pulley 67 of the carriage drive gear 52, a driven pulley 69, and a drive belt 7.
0 and a carriage drive pin 71.

Next, the power transmission in the printer 1 and the sheet feeding operation of the sheet feeding device 8 will be described.

In FIG. 8, the motor shaft 12 of the drive motor M1 rotates clockwise as indicated by arrow B. Motor shaft 1
2 rotates clockwise, the worm 13 fixed to the motor shaft 12 rotates clockwise, and the first transmission gear 50 meshing with the worm 13 rotates clockwise in FIG. The meshing carriage drive gear 52 rotates counterclockwise. Further, the carriage driving gear 52
Is transmitted to the third transmission gear 45 via the second transmission gear 54, and the third transmission gear 45 is
Rotate counterclockwise around 4.

When the third transmission gear 45 rotates counterclockwise, rotational force is transmitted to the ratchet wheel 46 and the small bevel gear 47 through the spring clutch, and the ratchet wheel 46 and the small bevel gear 47 are rotated counterclockwise around the support shaft 44. The bevel gear 47 rotates integrally clockwise and
The paper feed gear 43 meshes with and rotates clockwise integrally with the paper feed roller shaft 25 (see FIG. 8).

Next, the sheet feeding operation of the sheet feeding device 8 will be described. 4, a paper insertion port 73 formed between the trailing edge of the paper guide section 24 and the paper feed roller 26.
, The leading edge of the paper P is inserted and fed. Since the sheet P is supported and guided from below by the concave curved surface 24a of the sheet guide section 24, the leading edge of the sheet P is pressed against the sheet feed roller 26 and the press roller 2 which presses the sheet P with the sheet P being fed.
8 and is pinched.

When the paper feed roller shaft 25 rotates clockwise, the paper feed roller 26 rotates clockwise integrally with the paper feed roller shaft 25, and the paper feed roller 26 and the pressing roller 28 cooperate to perform the paper feed operation. Is carried out, and the leading end of the sheet P sandwiched between the sheet feed roller 26 and the pressure roller 28 is sent out toward the sheet guide plate 29. When the leading end of the sheet P contacts the sheet guide plate 29, the sheet P is sent upward along the sheet guide plate 29, and is sent between the platen plate 7 and the print head 18.

Although not described in detail, the print head 18 is driven by the carriage driving mechanism 20 which receives power from the carriage driving gear 52 to drive the printer 1.
Are moved integrally with the carriage 19 which is reciprocated in the left-right direction, and printing is performed on the paper P while the print head 18 is moving. While printing is being performed, the above-described stopper is actuated to prevent the rotation of the ratchet wheel 46, thereby interrupting the transmission of the rotational force to the small bevel gear 47 (power transmission gear). Interrupt.

Incidentally, a paper jam may occur at the time of paper feeding. Next, the elimination of a paper jam will be described. To eliminate the paper jam, the operation lever 33 is manually rotated against the bias of the lever spring 48.

FIG. 9 is a side view of the paper feeder 8 when the operation lever 33 is rotated. FIG. 10 is a schematic sectional view of the paper feeder 8 in a normal state where the operation lever 33 is not rotated, as viewed from the front. FIG. 11 is a schematic sectional view of the sheet feeding device 8 when the operation lever 33 is rotated, as viewed from the front.

In FIG. 5, when the operation lever 33 is rotated clockwise around the support shaft portion 34 against the bias of the lever spring 48, one end of the paper feed roller shaft 25 together with the operation lever 33 rotates clockwise. The paper guide frame 2 rotates
1 moves toward the upper end in the long hole 30 provided in the right side wall 23 and is lifted upward. The rotation range of the operation lever 33 is such that the right bearing 3 of the operation lever 33 is located at the upper end of the elongated hole 30.
9 is regulated by the contact.

As shown in FIGS. 9 and 11, when one end of the paper feed roller shaft 25 is lifted upward, the paper feed gear 4
3 is disengaged from the small bevel gear 47 (power transmission gear), the paper feed roller shaft 25 becomes free from the power transmission gear 47, and the paper feed roller shaft 25 moves the left bearing 32 at the other end. The distance between the paper feed roller 26 and the pressure contact roller 28 and the distance between the paper feed roller 26 and the paper guide portion 24 are increased by inclining to the center, and the jammed paper is easily removed. Since the gap between the paper feed roller 26 and the paper guide portion 24 increases, even if the paper is firmly jammed, the jammed paper can be easily removed.

As shown in FIG. 11, the paper feed roller shaft 25
When one end of the paper feed roller shaft 2
The other end of the paper guide frame 21 is supported by the left shaft support 32 of the left wall 22 of the paper guide frame 21 and does not move while maintaining a fixed position. The left side wall 22 is slightly elastically deformed to absorb the bending force.

After clearing the paper jam, the operation lever 33
When the manual operation is stopped, the operation lever 33 is rotated counterclockwise by the urging of the lever spring 48, and the paper feed gear 43 and the small bevel gear 47 are engaged with each other. Returns to the state.

In the present embodiment, the frame supporting the paper feed roller shaft is the paper guide frame 21 which also serves as a guide for paper feed, but the frame may support the end of the paper feed roller shaft 25. One side wall and the other side wall of the frame may be formed separately from the paper guide.

[0052]

According to the first aspect of the present invention, when the paper feed roller shaft is tilted by manipulating one end of the paper feed roller shaft at the time of jamming the paper, the paper feed path can be enlarged, and the jamming can be performed. Torn paper can be easily removed. In addition, the configuration in which one end of the paper feed roller shaft is moved to incline this roller shaft requires only one end operation of the paper feed roller shaft as compared with the structure in which both ends are moved, and is easy with one hand. , And the configuration can be simplified. Further, since the other end of the paper feed roller shaft remains supported, the paper feed roller shaft is less likely to be displaced. Therefore, the present invention is suitable as a paper feed device for a printer having a simple structure that does not require very high precision in terms of mechanism.

According to the second aspect of the invention, since one end of the paper feed roller shaft is supported by the bearing member, means for moving one end of the paper feed roller shaft is constructed using the bearing member. The means for moving one end of the paper feed roller shaft can be designed in a wide range.

According to the third aspect of the present invention, one end of the paper feed roller shaft can be moved by a simple structure of a bearing member that rotates around the support shaft of the frame,
The configuration of the sheet feeder can be simplified.

According to the configuration of the fourth aspect, one end of the paper feed roller shaft can be manually moved by the operation lever, and jamming of the paper can be reliably released with a simple structure. Since the sheet feed path can be enlarged by the operation lever, it is easy to remove jammed sheets that have been tightly jammed.

According to the fifth aspect of the present invention, by moving one end of the paper feed roller shaft, the transmission of power to the paper feed gear is also cut off at the same time, so that the jamming paper can be more easily taken out.

According to the configuration of the sixth aspect, the engagement between the paper feed gear and the power transmission gear during normal operation can be surely prevented, and an accident such as disengagement during paper feeding can be prevented. Further, if the operation lever is released after the jamming of the paper is released, the paper feed roller shaft automatically returns to the original correct position, so that the user does not forget to return it.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a printer according to an embodiment to which a paper feeding device of the present invention is applied.

2 is a frame for mounting a cassette in FIG.
FIG. 2 is a perspective view of the printer shown with the ink ribbon cassette and the upper frame removed.

FIG. 3 is a perspective view of the paper feeder according to the first embodiment;

FIG. 4 is a sectional view of a main part of a printer including the paper feeder according to the first embodiment;

FIG. 5 is a side view of the sheet feeder shown in the direction of arrow A in FIG. 3;

FIG. 6 is a perspective view showing an outer surface of a right side wall of the paper guide frame according to the first embodiment;

FIG. 7 is a perspective view of the operation lever, with a part of the same being cut away.

FIG. 8 is a perspective view of a main part of the printer, mainly showing a wheel train mechanism of the printer.

FIG. 9 is a side view of the sheet feeding device when the operation lever is rotated.

FIG. 10 is a schematic cross-sectional view in the axial direction of the sheet feeding device in a normal state where the operation lever is not rotated.

FIG. 11 is a schematic cross-sectional view in the axial direction of the sheet feeding device when the operation lever is rotated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer 2 Body frame 3 Cassette mounting frame 4 Ink ribbon cassette 5 Upper frame 6 Printing section 7 Platen plate 8 Paper feeder 9 Left side frame 10 Right side frame 11 Base frame 12 Motor shaft 13 Worm 14 Wheel train mechanism 15 Carriage shaft 16 Carriage Sub shaft 17 Platen section 18 Print head 18a Head section 19 Carriage 20 Carriage drive mechanism 21 Paper guide frame 22 Left side wall 23 Right side wall 24 Paper guide section 25 Paper feed roller shaft 26 Paper feed roller 27 Window hole 28 Pressure contact roller 29 Paper guide plate Reference Signs List 30 long hole (opening) 31 support hole 32 left bearing 33 operating lever 34 support 35 spring retaining projection 36 lever body (bearing member) 37 operating part 38 support hole 39 right bearing 0 shaft hole 41 spring retaining portion 42 finger retaining portion 43 paper feed gear 44 support shaft 45 third transmission gear 46 ratchet wheel 47 small bevel gear (power transmission gear) 48 lever spring 49 support shaft 50 first transmission gear 51 first short axis 52 Carriage drive gear 53 Second short axis 54 Second transmission gear 55 Worm wheel part 56 Large diameter gear part 57 Drive gear part 58 Small diameter gear part 59 Ribbon feed mechanism 60 Shaft 61 Fourth transmission gear 62 Large diameter gear part 63 Small diameter gear Unit 64 ribbon feed gear 65 drive gear unit 66 ribbon feed shaft 67 carriage drive pulley unit 68 pulley shaft 69 driven pulley 70 drive belt 71 carriage drive pin 72 engagement hole 73 paper insertion port M1 drive motor P paper

Claims (6)

[Claims] A frame is provided with a paper feed roller shaft, wherein one end of the paper feed roller shaft is movably disposed with respect to one side wall of the frame, and the other end is provided on the other side wall of the frame. A paper feed device which is supported by a shaft and can tilt the paper feed roller shaft by operating one end of the paper feed roller shaft. 2. An opening is provided in one side wall of the frame,
2. The sheet feeder according to claim 1, wherein the bearing member is movably disposed facing the opening, and one end of a paper feed roller shaft is supported by the bearing member. 3. The paper feed roller shaft according to claim 2, wherein the bearing member is rotatably supported by a support shaft provided on a side wall of the frame, and the paper feed roller shaft is inclined by the rotation of the bearing member. Paper feeder. 4. The sheet feeding device according to claim 2, wherein the bearing member and an operation lever for rotating the bearing member are integrally formed. 5. A paper feed gear is provided at one end of a paper feed roller shaft, and the engagement between the paper feed gear and a power transmission gear for driving the paper feed gear is released by moving one end of the paper feed roller shaft. The sheet feeder according to any one of claims 1 to 4, wherein: 6. The bearing according to claim 5, wherein the bearing member is biased in a direction in which the paper feed gear meshes with the power transmission gear side, and the bearing member can be turned by the operating lever against the biasing force. Paper feed device as described in the above.