JPH0556447U - Printer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to a printer including a printer and an automatic paper feeding device that is attached to and detached from the printer. Can be positioned and attached to the printer without engaging its front engaging legs with the platen shaft of the printer,
Moreover, it is an object of the present invention to prevent unnecessary force and impact from being exerted on the members related to each other during the operation of mounting and demounting the automatic paper feeder. [Structure] A pair of support portions located on or in front of a line connecting an axis of a drive gear and an axis of a drive receiving gear of a power transmission device is provided at a front portion of a printer frame, and both sides of an automatic paper feeding device are provided. The front part of the plate is provided with an engaging part which is placed on each support part and whose end faces are fitted and inserted in both width plates of the printer frame in the width direction.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a printing device including a printer and an automatic paper feeding device that is attached to and detached from the printer.

[0002]

[Prior Art]

 Generally, a printing device is composed of a printer and an automatic paper feeding device which can be attached to and detached from the printer. For example, the one disclosed in Japanese Patent Laid-Open No. 1-133823 is known.

In such a printing apparatus, the printer has a printer frame and a support member including rear support pins on the rear side. Further, the automatic sheet feeder has a front engaging leg in which an engaging groove is formed and a rear engaging leg.

In the automatic paper feeder, the engaging groove of the front engaging leg is engaged with and coupled to the platen shaft of the printer, and the rear engaging leg is supported by the rear supporting pin of the printer. It is mounted on the printer in a predetermined posture.

Further, the automatic paper feeder has a drive receiving gear that meshes with a drive gear of the printer, and the driving force from the drive receiving gear is transmitted to the paper feeding roller via a gear mechanism to rotate the paper feeding roller.・ It is driven.

[0006]

[Problems to be solved by the device]

 However, in the conventional printing apparatus, the front engaging leg of the automatic paper feeding device is engaged with the platen shaft of the printer to connect the automatic paper feeding device and the printer. There is an operation to insert and engage the compound leg, and the front engaging leg may be damaged or deformed by hitting the front engaging leg against the parts of the printer, or carefully automatic to avoid such trouble. You will have to attach and detach the paper feeder.

In addition, since it is necessary to provide a space for receiving the front engaging legs in the printer, the structure becomes large and various constituents such as designing the constituent parts small are required. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to mount an automatic paper feeder on a printer and to mount the front engaging leg on the platen of the printer. (EN) Provided is a printing device which can be positioned and mounted on a printer without engaging with a shaft, and which does not apply unnecessary force or impact to members related to each other when mounting or removing an automatic paper feeding device. That is.

[0008]

[Means for Solving the Problems]

 The present invention has a printer having a printer frame for printing fed paper, a hopper for storing laminated paper, a paper feed roller for contacting the laminated paper and feeding the paper to the printer, and a feeding roller. Separation means for separating the fed paper one by one and power transmission for rotationally driving the paper feed roller by receiving a driving force from a driving gear of the printer by removably positioning and locking the printer frame of the printer. And an automatic paper feeding device having a device, the printer is located at the front of the printer frame, on the line connecting the axis of the drive gear and the axis of the drive receiving gear of the power transmission device, or in front of this. A pair of bearings are provided, and at the front of both side plates of the automatic paper feeder, there are provided an engaging part that is placed on each bearing and the end faces of the printer frame are inserted in the widthwise direction. It is characterized in.

[0009]

[Action]

 In the present invention, on the front side of the printing device, the automatic paper feeding device has its engaging parts placed on the bearing parts of the printer, respectively, and is positioned in the height direction. The end faces are positioned in the width direction by both side plates of the printer frame.

In some cases, the attachment / detachment of the automatic paper feeding device to / from the printer is performed by using the front side as a rotation center and lifting the rear side. When the automatic paper feeder is detached, the rear side is lifted while supporting the engaging parts of the automatic paper feeder on the bearings of the printer, respectively. Since it is located on the line connecting the shaft center and the shaft center of the drive receiving gear or in front of this, the drive receiving gear is disengaged so as not to be caught in the drive gear.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a printer according to an embodiment of the present invention.

In the figure, a printer 1 according to an embodiment of the present invention comprises a printer 2 for printing fed sheets and an automatic sheet feeder 3. The printer 2 has a printer frame 4, and a platen shaft 5 is attached to a right side plate 4A and a left side plate 4B of the printer frame 4, and a platen 6 is provided on the platen shaft 5. A drive gear 7 is fixed to one end of the left side plate 4B. A limit switch 8 having a lever 8A is provided on the inner surface of the upper end of the right side plate 4A.

Then, a pair of bearings composed of a front support pin 9A on the right side and a front support pin 9B on the left side are fixedly provided on the front parts of the left and right side plates 4A, 4B of the printer frame 4, respectively. On the rear part of the support member 2, a support member including a rear support pin 10 is provided.

On the other hand, the automatic paper feeding device 3 is fed with a hopper 3 A for storing the laminated paper, a paper feed roller (not shown) for contacting the laminated paper and feeding the paper to the printer 2. The printer 2 is provided with a separating means (not shown) for separating the sheets one by one, and further has a rear engaging leg 11 that is supported or released from the rear supporting pin 10 of the printer 2.

Further, at the front end of the lower end of the right side plate 13 of the automatic paper feeding device 3, an engaging portion formed of a right rib 14 having a flat lower surface is formed. An engaging portion composed of a left rib 15 having a flat lower surface is formed at the front portion of the lower end of the left side plate 12.

The right rib 14 is provided with a guide 16 protruding downward from the right rib 14 and having a guide slope 16A. In the automatic paper feeding device 3, a drive receiving gear 17A of a power transmission device 17 that meshes with a drive gear 7 of the printer 2 is arranged, and a driving force from the drive receiving gear 17A is transmitted via a gear mechanism 18 of the power transmission device 17. It is transmitted to the paper feed roller to rotate and drive the paper feed roller.

The front support pins 9A and 9B of the printer frame 4 are located on a line C connecting the axis of the drive gear 7 and the axis of the drive receiving gear 17A. Therefore, in this embodiment, on the front side of the printer 1, the automatic paper feeder 3 mounts the lower surface of the right rib 14 and the lower surface of the left rib 15 on the front support pins 9A and 9B of the printer 2. The right rib 14 and the left rib 15 have their end surfaces 14A and 15A positioned in the width direction on the inner surfaces of the left and right side plates 4A and 4B of the printer frame 4, respectively. Further, the rear engagement legs 11 of the automatic paper feeder 3 are supported by the rear support pins 10 of the printer 2.

In the automatic sheet feeder 3, the guide slope 16A of the guide 16 is guided by the right side plate 4A, and the mounting operation is easy. Therefore, the automatic paper feeder 3 is positioned and set on the printer 2 in a predetermined posture. At this time, the distance from the axis of the drive gear 7 to the axis of the drive receiving gear 17A is secured, accurate drive transmission is performed, and at the same time, the right rib 14 presses the lever 8A of the limit switch 8. As a result, a switch action is generated, the printer 2 senses that the automatic paper feeding device 3 is mounted, and is controlled to the automatic paper feeding mode.

In some cases, the automatic paper feeding device 3 may be attached / detached to / from the printer 2 while the front side thereof is the center of rotation and the rear side is lifted. When the automatic paper feeding device 3 is attached or detached, the right rib 14 and the left rib 15 of the automatic paper feeding device 3 are supported on the front support pins 9A and 9B of the printer 2 and the rear side is lifted. Since the front support pins 9A and 9B are located on the line C connecting the axis of the drive gear 7 and the axis of the drive receiving gear 17A, the drive receiving gear 17A should not be caught in the drive gear 7. Removed.

When the automatic paper feeding device 3 is attached / detached to / from the printer 2 with the rear side as the center of rotation and the front side is lifted, the drive receiving gear 17A and the drive gear 7 do not get caught. Of course.

According to the above-mentioned configuration, on the front side of the printing apparatus 1, the front support pins 9A and 9B of the printer frame 4 and the right ribs 14 and the left ribs 15 of the automatic sheet feeder 3 are positioned and set. Since the platen shaft 5 of the printer 2 is used as a supporting portion and the front engaging leg of the automatic paper feeding device 3 is supported by this, the restriction of the positioning structure is released. As a result, even if the printer 2 has a structure in which there is no room for receiving the front engaging legs of the automatic paper feeding device 3, the automatic paper feeding device 3 can be positioned and set in the printer 2 and can be easily attached and detached. Therefore, deformation and collision of parts can be reduced. From the perspective of the printer 2, it is possible to reduce the conditions for supporting and coupling the automatic sheet feeder 3 from the beginning in its design.

Further, since the front support pins 9A and 9B of the printer 2 are located on the line C connecting the shaft center of the drive gear 7 and the shaft center of the drive receiving gear 17A of the power transmission device 17, It is possible to prevent the drive gear 7 and the drive receiving gear 17A from being bitten during the attachment / detachment operation of the sheet feeding device 3 and prevent the engagement state from being adversely affected.

In this embodiment, the front support pins 9A and 9B of the printer frame 4 are located on the line C connecting the axis of the drive gear 7 and the axis of the drive receiving gear 17A. , The line C can be located in front of the line C. Even in this case, it is possible to prevent the drive gear 7 and the drive receiving gear 17A from being caught during the attachment / detachment operation of the automatic paper feeding device 3 and adversely affect the meshing state. Of course, it can be prevented.

Further, in the present embodiment, the right rib 14 is provided with the guide 16 projecting downward from the right rib 14, but the guide 16 does not necessarily have the above-mentioned predetermined effect. Can be generated.

Further, in the present embodiment, the lower surface of the right rib 14 and the left rib 15 of the automatic paper feeder 3 is configured to be flat, but as shown in FIGS. It is also possible to provide the lower rib 15 with an engaging portion 21 engageable with the front support pins 9A and 9B on the lower surface thereof. This prevents the rotational force of the drive gear 7 from pushing up the drive receiving gear 17A and floating upward when the rotation direction of the paper feed roller is switched while the printer 1 is operating.

In the present embodiment, the right rib 14 and the left rib 15 are described as an example of the pair of engaging portions, but the pair of engaging portions is not limited to this. Further, in this embodiment, the end surface 15A of the right rib 14 and the end surface 15A of the left rib 15 are positioned in the width direction by the inner side surfaces of the left and right side plates of the printer frame 4, but The distance between the left and right side plates is made larger than the distance between the left and right side plates of the printer frame 4 of the printer 2, and left and right ribs are formed on the left and right side plates of the automatic paper feeder 2, respectively, and the end faces thereof are formed. Can be brought into contact with the outer side surfaces of the left and right side plates of the printer frame 4 and thereby be positioned in the width direction.

Further, in the present embodiment, the pair of bearing portions are the front support pins 9A and 9B, but the shape of the bearing portions is not limited to the pin shape.

[0028]

[Effect of the device]

 As described above, according to the present invention, on the front side of the printing apparatus, the pair of supporting portions of the printer frame and the corresponding pair of engaging portions of the automatic paper feeding device are positioned and set. Since this is a means, the constraint of the positioning structure that the platen shaft of the printer is used as the supporting portion to support the front engaging legs of the automatic paper feeder is released. As a result, even if the printer has a structure in which there is no room for receiving the front engaging legs of the automatic paper feeder, the automatic paper feeder can be positioned and set in the printer, and it is easy to attach and detach, and the parts are not deformed. Also, the number of collisions can be reduced.

Further, since the support portion of the printer is located on the line connecting the shaft center of the drive gear and the shaft center of the drive receiving gear of the power transmission device or in front of this line, it is possible to perform the attachment / detachment operation of the automatic paper feeding device. There is an effect that it is possible to prevent the drive gear and the drive receiving gear from being caught, and to prevent the meshing state from being adversely affected.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the printing apparatus.

FIG. 3 is an enlarged front view of a main part of the printing apparatus.

FIG. 4 is a partial cross-sectional side view showing a relationship between a drive gear of a printer and a drive receiving gear of an automatic paper feeder in the printing apparatus.

FIG. 5 is a partial cross-sectional side view showing a modified example of the printing apparatus according to the embodiment of the present invention.

FIG. 6 is a front view showing an engaging portion of FIG.

[Explanation of symbols]

 1 Printer 2 Printer 3 Automatic Paper Feeder 4 Printer Frame 4A Right Side Plate 4B Left Side Plate 7 Drive Gear 9A Front Support Pin (Bearing) 9B Front Support Pin (Bearing) 14 Right Rib (Engagement) 15 Left Rib (engagement part) 17 Power transmission device 17A Drive receiving gear

Claims (1)

[Scope of utility model registration request] 1. A printer having a printer frame for printing fed paper, a hopper for storing laminated paper, a paper feed roller for contacting the laminated paper and feeding the paper to the printer, A separating means for separating the fed sheets one by one; and a power transmission device for removably positioning and locking the printer frame of the printer to receive a driving force from a driving gear of the printer to rotationally drive the sheet feeding roller. In a printing device comprising an automatic paper feeding device having a pair of front and rear lines of the printer frame, a pair of front and rear lines are provided on a line connecting the shaft center of the drive gear and the shaft center of the drive receiving gear of the power transmission device. Supporting parts are provided, and at the front parts of both side plates of the automatic paper feeder, engaging parts which are placed on the respective supporting parts and whose widthwise end faces are inserted into both side plates of the printer frame are respectively provided. A printing device characterized by the above.