JPH04135767A - Printer - Google Patents

Abstract

PURPOSE:To reduce the number of components by simplifying a fitting structure of a latch lever by a method wherein a fitting part for fitting a paper feeder to positions on a paper feed out side to a platen and a sending in side is provided to a frame, and the paper feeder is enabled to be rearranged between both positions. CONSTITUTION:A paper feeder 15 is on-off adjustably attached to a chassis 3 of a frame 1 and can be rearranged to a position opposed to a paper discharge opening 14 on a paper sending out side than a platen 5 and to a position opposed to a rear paper supply opening 12 on a paper sending in side than the platen 5. Then, when the paper feeder 15 is arranged on the paper sending out side to the platen 5, continuous forms printing paper to be supplied form a bottom surface side of a casing 2 via a lower part paper supply opening 13, after passing a printing position on the platen 5, is pulled out from the paper discharge opening 14 with this paper feeder 15.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a printer in which a print head prints on the printing paper while the paper is fed onto a platen by a paper feeding device. be.

2. Prior Art In conventional printers of this type, a paper feeding device equipped with a pin tractor is configured to be repositionable on the frame of the printer between a position on the paper feeding side and a position on the paper feeding side with respect to the platen. In both positions, a latch lever rotatably supported on the support plate of the paper feed device;
By engaging with fixed parts such as pins provided on the frame,
It was designed to be permanently latched to a paper feeder or frame.

5. Problems to be Solved by the Invention] However, in this conventional printer, either a latch lever for latching the paper feed device to the frame of the printer, or a latch lever supported between support plates to rotationally drive the pin tractor is used. Since the rotation shaft is rotatably attached to the support plate by a support shaft or the like at a position away from the shaft end of the rotation shaft, the installation structure of the locking lever is complicated, and the operation part of the locking lever is difficult to operate. Since it needs to protrude in a direction that does not interfere with the shaft end of the rotating shaft, there is a problem in that the operating position is limited.

The present invention was made by focusing on the problems existing in the conventional technology, and its purpose is to improve the latching lever for latching the paper feed device to the frame of the printer. The mounting configuration can be simplified and the number of parts can be reduced, and the operating part of the latch lever can be freely protruded in any direction, so the operating position can be set arbitrarily without being restricted. Our goal is to provide a printer that can do the following:

[Means for Solving the Problems] In order to achieve the above object, the invention according to claim 1 includes a frame that includes a platen that extends in one direction, and a platen that reciprocates along the longitudinal direction of the platen. In a printer that supports a print head that performs printing on the printing paper above, and also has a paper feed device removably attached to the frame, the frame has a paper feed device on the paper feed side and the paper feed side with respect to the platen. A mounting part is provided to attach the paper feed device to the side position, so that the paper feed device can be relocated between the same positions, and the paper feed device is rotatably supported by a pair of left and right support plates and between both support plates. It includes a rotating shaft, and a pin tractor provided on the rotating shaft to feed the printing paper by engaging with a feed hole of the printing paper, and on the support plate, the rotating shaft is provided with a paper feeding device. When installed, it can be rotated between the position where it is latched to the fixed part of the frame and the position where it is unlatched, and a latching lever is provided that prevents the paper feeder from falling off from the frame when it is latched. It is something.

Further, in the invention as set forth in claim 2, the fixing portion provided on the frame is constituted by a locking pin that is engaged with an engagement recess formed in the support plate of the paper feeding device, and the locking portion of the locking pin is The tip is provided with a tapered head that guides the support plate.

5. Effects] In the printer configured as described above, when the paper feed device is attached to the paper feed side position or the paper feed side position with respect to the platen, the latch lever on the paper feed device side or the fixed part on the frame side It is engaged and latched to the paper feeder or frame. In addition, when relocating the paper feeding device to the other position, the paper feeding device can be removed from the frame by rotating the latch lever and disengaging it from the fixed part, and then the paper feeding device can be removed from the frame. When it is attached to the other position, the paper feeding device is latched and held on the frame by engaging the latching lever or the fixing portion.

Furthermore, when the fixing portion is composed of a locking pin having a tapered head, when the paper feeding device is attached to the frame, the engagement recess of the support plate and the locking lever are
It engages with the tapered head of the locking pin and is securely locked to the locking pin. Therefore, the paper feeding device can be firmly hooked and held on the frame without wobbling.

[Embodiment] Hereinafter, an embodiment of a printer embodying the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a printer frame 1 includes a synthetic resin casing 2 with an open upper surface, a steel plate chassis 3 disposed inside the casing 2, and a casing 2.
It consists of a cover 4 made of synthetic resin attached to the top. The platen 5 is rotatably supported between both side plates of the chassis 3, and a guide rod 6 as a guide member is installed between the side plates of the chassis 3 so as to extend in parallel along the longitudinal direction of the platen 5. There is. The carriage 7 is supported on the guide rod 6 so as to be able to reciprocate, and a print head 8 for printing on the print sheets Pi and P2 on the platen 5 is mounted on the upper part of the carriage 7, and a ribbon cassette 9 is also attached and detached. Possibly installed.

A paper guide 10 is formed on the casing 2 in close proximity to the lower outer periphery of the platen 5, and feeds single-cut printing paper P1 onto the platen 5 from an upper paper supply port 11 provided in the cover 4 along the paper kite 10. Supplied. A rear paper supply port 12 and a lower paper supply port 13 are formed at the rear and bottom of the casing 2, and the continuous printing paper P2 is supplied onto the platen 5 from these paper supply ports 12,13. The paper discharge port 14 is formed in the upper part of the cover 4, and the paper discharge port 14 is formed in the upper part of the cover 4, and the paper discharge port 14 is used to collect the printing paper PI which has been printed by the print head 8 on the platen 5.
, P2 are discharged from this paper discharge port 14.

The paper feed device 15 is detachably attached to the yarn 3 of the frame 1, and is located at a position opposite to the paper outlet 14 on the paper feed side of the platen 5, as shown by the solid line in FIG. As shown in , it is possible to rearrange the position to a position facing the rear paper supply port 12 on the paper feeding side of the platen 5 . When the paper feed device 15 is disposed on the paper feed side with respect to the platen 5, the lower paper supply port 1 is inserted from the bottom side of the casing 2.
3 or the continuous printing paper P2 supplied via platen 5.
After passing through the upper printing position, the paper feed device 15 pulls out the paper from the paper outlet 14 . Further, when the paper feed device 15 is arranged on the paper feed side with respect to the platen 5, the continuous printing paper P2 is fed by the paper feed device 15 from the rear paper supply port 12 onto the platen 5,
After passing the printing position, the paper is discharged from the paper discharge port 14.

As shown in FIGS. 1 and 8, the introduction passage 16 is formed in the bottom surface of the casing 2 in a downward concave shape, leaving both sides thereof, and communicates with the lower paper supply port 13 at the front end, and at the rear. The end is opened to the rear of the casing 2. When printing is performed with the paper feeding device 15 disposed on the paper feeding side relative to the platen 5, the continuous printing paper P2 can be introduced into the lower paper supply port 13 from the rear of the casing through this introduction passage 16.

As shown in FIGS. 1 and 2, the paper feeding device 15 includes a pair of left and right support plates 19, a support rod 20 installed between both support plates 19, and a support rod 20 extending parallel to the support rods 20. The rotary shaft 22 is rotatably supported between both support plates 19 via a bearing 21, and a pair of pin tractors 23 are movably supported on the support rod 20 and the rotary shaft 22.

By rotating the rotating shaft 22 while the pin tractor 23 is engaged with the feed holes on both sides of the continuous printing paper P2, the continuous printing paper P2 is rotated through the pin tractor 23.
2 will be given a send-off.

As shown in FIG. 3 and FIG.
The paper feed device 15 is provided protrudingly on both outer surfaces of the platen 5, and constitutes a mounting portion and a fixing portion for mounting and fixing the paper feeding device 15 at a position on the paper feeding side with respect to the platen 5. Each pair of lower locking pins 26 and 27 are protruded from both outer surfaces of the chassis 3 facing the rear paper supply port 12, and fix the paper feed device 15 in a position on the paper feed side relative to the platen 5. It constitutes a mounting part and a fixing part for.

The three engaging recesses 28, 29, and 30 are connected to the paper feeding device 1.
They are formed at the tip, upper and lower parts of both support plates 19 of No. 5, respectively. As shown in FIG.
5, the paper feeding device 15 moves to the platen 5.
It is attached to the paper feed side position. In addition, as shown in FIG. 6, by engaging the other two engaging recesses 29 and 30 with the lower locking pins 26 and 27 of the chassis 3, the paper feeding device 15 and the paper feeding side relative to the platen 5 are engaged with each other. mounted in position.

A pair of left and right locking levers 31 are rotatably supported by a bearing 21 of a rotary shaft 22 on the outer surface of both support plates 19 of the paper feeding device 15, and are removably connected to a locking pin 25 at one end thereof. A hook portion 32 is provided at the other end, and an engaging portion 33 that can be engaged with and detached from the locking pin 26 and an operating portion 35 that opposes a finger hook portion 34 on the support plate 19 are provided at the other end.

The springs 36 are respectively hung between the latch lever 31 and the support plate 19, and are placed in positions on the paper feed side or the paper feed side relative to the paper feed device 15 or the platen 5, as shown in FIGS. 3 and 6. In the attached state, this spring 36 locks the locking lever 31 or the locking pin 25 or the locking pin 26.2.
The paper feeding device 15 is rotatably biased to the position where it engages with the paper feeding device 7, and is held and latched to the chassis 3 so that it cannot fall off.

As shown in FIGS. 2 and 4, each of the locking pins 24,
25, 26, and 27 have a tapered head 37 at their tip.
have. When the paper feed device 15 is mounted on the paper feed side or the paper feed side position with respect to the platen 5, the tapered heads 37 of the locking pins 24 to 27 allow the support plate 19 to be attached to the shear 3 and to be engaged with it. The locking of the locking lever 31 on the locking pins 25, 26, 27 is guided.

As shown in FIGS. 1, 3, and 6, a pair of left and right guide grooves 38 are formed on both side plates of the chassis 3 behind the rear paper supply port 12, and extend forward from the rear end of the chassis 3. It extends diagonally upward. As shown by the chain line in FIG. 3, when the paper feed device 15 is mounted on the paper feed side position with respect to the platen 5, the bearings 21 at both ends of the rotating shaft 22 engage with the guide groove 38, and the paper When the feeding device 15 is guided diagonally upward from the rear of the chassis 3 toward the front and the bearing 21 reaches the inner end of the guide groove 38 as shown in FIG.
It is located at a lower height than that at the rear of the vehicle.

Further, in this embodiment, a holding means is constituted by the lower locking pin 26 located above the kite groove 38 and the upper end edges 39 of both support plates 19 of the paper feeding device 15, and the third
As shown by the chain line in the figure, when the paper feed device 15 is guided toward the inner end of the guide groove 38 due to the engagement between the bearing 21 and the guide groove 38, the upper edge 39 of the support plate 19 is engaged with the lower part. Engaged with the pin 26, the paper feed device 15 is held in use. The engaging piece 40 is provided in a protruding manner inside the operating portion 35 of the both locking levers 31 in the paper feeding device 15, and is guided toward the inner end of the paper feeding device 15 or the guide groove 38, as shown by the chain line in FIG. When moved, this engagement piece 40 or the kite groove 38
The locking lever 31 is engaged with the upper edge of the rear end and is rotated to the disengaged position prior to engagement with the lower locking pin 27.

As shown in FIGS. 5 and 7, the drive mechanism 43 is provided on the right outer surface of the chassis 3, and is composed of a motor 44 and a gear train consisting of a plurality of gears 45, 46, and 47. The platen gear 48 is fitted and fixed to the right end of a platen shaft 49 that supports the platen 5, and is meshed with a gear 47 of a gear train.

Then, when the gear 44 is rotated, the gears 45 to 47
The platen 5 is also rotated via the platen gear 48, and feeding is applied to the print sheets PI and P2.

As shown in FIGS. 2, 5, and 7, the drive gear 50
is fixed to the right end of the rotation shaft 22 on the outer surface of the right support plate 19 of the paper feeding device 15. The connecting gear 51 is rotatably and movably supported in the axial direction by a support shaft 52 on the outer surface of the right support plate 19 so as to be releasably engaged with the driving gear 50, and is normally supported by a spring 53 to engage the driving gear 50 in a removable manner.
0 and is urged to move to a position where it meshes with 0.

As shown in FIG. 5, when the paper feeding device I5 is installed at a position on the paper feeding side relative to the platen 5, the connecting gear 51 is meshed with the platen gear 48, and the rotation of the platen gear 48 is caused by the rotation of the connecting gear 51. and drive gear 50
The signal is transmitted to the rotating shaft 22 via the pin tractor 23, and the pin tractor 23 is rotationally driven. Further, as shown in FIG. 7, when the paper feeding device 15 is installed at a position on the paper feeding side relative to the platen 5, it is meshed with the connecting gear 51 or the gear 47 of the gear train, and the rotation of the gear 47 is caused by the rotation of the connecting gear. 51 and the drive gear 50 to the rotating shaft 22, and the pin tractor 2
3 rotationally driven.

Next, the operation of the printer configured as described above will be explained.

Now, FIG. 1, FIG. 3, and FIG. 5 show a state in which the paper feeding device 15 is attached to a position on the paper feeding side with respect to the platen 5. In this state, the engagement recesses 28 and 30 of both support plates 19 on the paper feeding device 15 side engage with the upper locking pins 24 and 25 on both sides of the chassis 3, and
The hook portions 32 of both latch levers 31 are engaged with the upper latch pins 25, so that the paper feeding device 15 is latch-held with respect to the chassis 3. Also, in this state, the paper feed device 15
The side connecting gear 51 is meshed with the platen gear 48.

Therefore, in this state, when the passbook printing paper P2 is passed from the lower paper supply port 13 to the printing position on the platen 5 and the paper discharge port 14, and set on the pin tractor 23 of the paper feed device 15, the printer is operated. At the printing position on the platen 5, since the printing head 8 does not print on the continuous printing paper P2, the platen 5 is rotated by the motor 44 of the drive mechanism 43 via the gears 45 to 48 and the platen shaft 49. At the same time, the gear 51 of the paper feed device 15.
50 and the rotation shaft 22, the continuous printing paper P2 is pulled out from the printing position on the platen 5.

At this time, a lower paper supply port 13 is provided on the bottom of the casing 2.
Since there is an introduction passage 16 that communicates with It is opened to Therefore, there is no need to use a special desk or the like having a paper supply opening in the top plate portion corresponding to the lower paper supply port 13 on the bottom of the casing 2, and the continuous printing paper P2 can be fed from the rear of the casing 2.
The paper can be introduced into the printing position on the platen 5 through the introduction passage 16 and the lower paper supply port 13 without any trouble.

Furthermore, when relocating the paper feeding device 15 from a position on the paper feeding side relative to the platen 5 to a position on the paper feeding side, the paper feeding device 15 should be moved in the state shown in FIGS.
When the operating portions 35 of both of the locking levers 31 are rotated backward, the hook portions 32 of the locking levers 31 are disengaged from the upper locking pins 25, and the paper feeding device 15 relative to the shear 3 is released.
The lock is released. Therefore, when the paper feed device 15 is lifted from above the chassis 3 in this state, both support plates 19
The engaging recesses 28 and 30 are disengaged from the upper locking pins 24 and 25, and the paper feeding device 15 can be removed.

Thereafter, as shown by the chain lines in FIG. 3, when the paper feeding device 15 is moved forward with both bearings 21 of the paper feeding device 15 engaged with the guide groove 384 of the chassis 3, the paper feeding device 15 is guided diagonally upward from the rear of the chassis 3 toward the front along the guide groove 38, and as shown in FIG. 6, when the bearing 21 reaches the inner end of the kite groove 38,
The paper feeding device 15 is arranged at a position lower than the height of the platen 5 at the rear thereof.

When the paper feed device 15 is guided toward the inner end of the kite groove 38, it engages with the upper edge 39 of the support plate 19 or the lower locking pin 26 to hold the paper feed device 15 in the used state. At the same time, the engagement piece 40 of the locking lever 31 engages with the upper edge of the rear end of the kite groove 38, and the locking lever 31 is rotated to the disengaged position prior to engagement with the lower locking pin 27. be moved. Therefore, the user does not need to operate the latch lever 31, and when attaching the paper feeding device 15 to the paper feeder 3 from the rear to the front, the paper feeding device 15 does not need to be operated.
The paper feeding device 15 can be attached very easily without having to maintain the posture in use. Therefore, when installing the paper feeding device at the paper feeding position, it is generally possible to do the installation work without going around to the rear of the printer, or to do the installation work in a fumbling manner, or even in such a case, the work can be done easily and quickly. .

When the paper feeding device 15 reaches the inner end of the guide groove 38 as described above, as shown in FIG.
The engaging recesses 29 and 30 of both side support plates 19 engage with the lower locking pins 26 and 27 on both sides of the chassis 3, and the hook portions 32 and engaging portions 33 of both locking levers 31 engage with the lower locking pins 26 and 27 on both sides of the chassis 3. Engaged with the pins 27 and 26, the paper feed device 15 is latched to the chassis 3 at a position on the paper feed side relative to the platen 5. Also, at this time, as shown in Figure 7,
The connecting gear 5I on the paper feeding device I5 side is meshed with the gear 47 of the gear train in the drive mechanism 43.

Therefore, in this state, if the continuous printing paper P2 is passed from the rear paper supply port 12 to the printing position on the platen 5 and the paper discharge port 14, and set on the pin tractor 23 of the paper feed device 15, the printer is operated. The motor 44 of the drive mechanism 43 rotates the platen 5 via the gears 45 to 48 and the platen shaft 49, and the pin tractor 23 is rotated via the gears 51 and 50 of the paper feeding device 15 and the rotating shaft 22. , while the continuous printing paper P2 is fed to the printing position on the platen 5, printing is performed on the continuous printing paper P2 by the print head 8.

During this printing operation, the paper feed device 1
Since the continuous printing paper P2 fed by the paper feeding device 15 is placed at a position lower than the height position of the platen 5 at the rear of the platen 5, the print head 8 This shortens the contact length in the circumferential direction to the position where printing is performed on the continuous printing paper P2, and it is possible to reduce the occurrence of jamming of the continuous printing paper P2 in contact with the platen 5.

Further, in this embodiment, as shown in FIG. 4, tapered heads 37 are provided at the tips of the upper locking pin 24.25 and the lower locking pin 26.27, so that the paper When attaching the feeding device 15 to the chassis 3 of the frame 1, the engagement recesses 28, 29, 30 of the support plate 19 and the hook portion 32 and engagement portion 33 of the latch lever 31 are connected to the tapered head 3T. It is engaged with the locking pins 24 to 27 to be securely locked. Therefore, the paper feeding device 15 can be firmly hooked and held on the shear 3 without rattling.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and includes, for example, a mounting portion for attaching the paper feed device 15 and a fixing portion for latching the latch lever 31 of the paper feed device 15. It is also possible to change the configuration of each part arbitrarily and embody it without departing from the spirit of the invention, such as by appropriately changing the configuration.

``Effects of the Invention Since this invention is configured as explained above,
It has the following excellent effects:

In the invention described in claim 1, the latch lever for latching the paper feeding device to the frame of the printer is rotatably supported on the support plate about the rotating shaft, so that the mounting structure of the latch lever is improved. It is possible to simplify and reduce the number of parts, and the operating part of the latch lever can be freely protruded in any direction, and the operating position can be set arbitrarily without being restricted. can.

In the invention according to claim 2, since the fixing portion is provided on the frame side so as to be engaged with and disengaged from the latching lever, or the latching pin has a tapered head. Due to the action of this section, the engaging recess of the support plate and the locking lever are reliably engaged with the locking pin, so that the paper feeding device can be firmly locked and held on the frame without wobbling.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a printer embodying the present invention, FIG. 2 is a partial front view showing a paper feeding device thereof, and FIG. 3 is a position of the paper feeding device on the paper feeding side with respect to the platen. 4 is an enlarged partial sectional view showing a locking pin for hooking the paper feeding device to the frame, and FIG. 5 is a partial sectional side view showing the state in which the paper feeding device is attached to the platen. FIG. 6 is a partial side sectional view showing the drive configuration when the paper feeding device is installed at the side position relative to the platen, and FIG. FIG. 8 is a partial side cross-sectional view showing the drive configuration, and FIG. 8 is a cross-sectional view showing the introduction passage connected to the paper supply port on the bottom surface of the frame. DESCRIPTION OF SYMBOLS 1... Frame, 5... Platen, 8... Print head, 15... Paper feed device, 19... Support plate, 22
...Rotating shaft, 23...Pin tractor, 24-27.
... Locking pins forming the mounting part and fixing part, 28 to 30
...Engagement recess, 31...Latching lever 37...Tapered head, Pl...Single sheet printing paper, P2...Continuous printing paper. Patent applicant Bracer Industries Co., Ltd. Agent
Patent Attorney On 1) Hironobu (and 1 other person) Figure 7

Claims (1)

[Claims] 1. A platen (5) extending in one direction on the frame (1)
and a print head (8) that reciprocates along the longitudinal direction of the platen (5) to print on the print paper (P1, P2) on the platen (5), and also supports the frame (1). ), in which the paper feeding device (15) is removably attached to the frame (1);
15) at the paper feed side and paper feed side positions with respect to the platen (5).
) to enable the paper feeding device (15) to be relocated between both positions, and the paper feeding device (15) is connected to a pair of left and right support plates (19).
, a rotating shaft (22) rotatably supported between both support plates (19), and a rotating shaft (22) provided on the rotating shaft (22) that engages with the feed hole of the printing paper (P2) to feed the printing paper (P2). a pin tractor (23) that applies feeding to the paper feeder (15); (25, 27) can be rotated between the position where it is latched and the position where it is unlatched, and in the latched state, the latching prevents the paper feeder (15) from falling off the frame (1). A printer characterized by being provided with a lever (31). 2. The fixing part provided on the frame (1) is connected to the engagement recess (2) formed in the support plate (19) of the paper feeding device (15).
locking pins (24, 25, 26,
27), and its locking pins (24, 25, 26, 27)
2. The printer according to claim 1, wherein a tapered head (37) for guiding said support plate (19) is provided at a tip end of said support plate (19).