JP2940125B2 - Printer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer which prints a printing paper on a printing paper by a printing head while feeding the printing paper onto a platen by a paper feeding device. is there.

[Prior Art] In a conventional printer of this type, a paper feeder having a pin tractor is configured to be repositionable on a frame of the printer between a position on a paper feed side and a position on a paper feed side with respect to a platen, At both of these positions, the paper feeder falls off the frame due to the engagement of the locking lever rotatably supported on the support plate of the paper feeder with a fixed portion such as a pin provided on the frame. It was to be locked on impossible.

[Problems to be Solved by the Invention] However, in this conventional printer, a locking lever for locking the paper feeder to the frame of the printer is not provided.
At a position away from the shaft end of the rotating shaft supported between the support plates for driving the pin tractor to rotate, it is attached to the support plate by a support shaft or the like so that it can be rotated. The structure is complicated, and it is necessary to protrude the operating portion of the latch lever in a direction that does not interfere with the shaft end of the rotating shaft, and thus there is a problem that the operating position is limited.

The present invention has been made in view of such a problem existing in the prior art, and an object thereof is to provide a locking lever for locking a paper feeder to a printer frame. The mounting structure can be simplified, the number of parts can be reduced, and the operating part of the latch lever can be freely protruded in any direction, so that the operating position can be set arbitrarily without restriction. It is to provide a printer that can do it.

[Means for Solving the Problems] In order to achieve the above object, according to the first aspect of the present invention, a platen extending in one direction and a platen reciprocating along the longitudinal direction of the platen are provided on the frame. In a printer, which supports a print head for performing printing on the upper printing paper, and also has a paper feeding device detachably provided on the frame, the paper feeding device is provided on the frame with a paper feeding side to a platen and a paper feeding side. A mounting portion for mounting at the side position is provided, and the paper feeding device can be rearranged between the two positions, and the paper feeding device is rotatably supported between the pair of left and right support plates and the two support plates. A rotating shaft, and a pin tractor provided on the rotating shaft and engaged with a feed hole of the printing paper to apply the feeding to the printing paper. In the attached state, a rotatable operation can be performed between a position where the paper feeder is hooked on the fixed portion of the frame and a position where it is released therefrom. In the hung state, a locking lever for preventing the paper feeder from dropping out of the frame is provided. It is a thing.

Further, in the invention according to claim 2, the fixing portion provided on the frame is constituted by a locking pin engaged with an engaging concave portion formed on a support plate of the paper feeding device, and The distal end is provided with a tapered head for guiding the support plate.

[Operation] In the printer configured as described above, when the paper feeder is mounted at the position on the paper feed side or the paper feed side with respect to the platen, the locking lever on the paper feeder side is attached to the fixing portion on the frame side. In engagement, the paper feeder is latched and held against the frame. When the paper feeder is rearranged to the other position, the paper feeder can be removed from the frame by rotating the latch lever to disengage the paper feeder from the fixed portion. Is attached to the other position, the latch lever is engaged with the fixing portion, and the paper feeder is latched and held on the frame.

Further, when the fixing portion is formed of a locking pin having a tapered head, when the paper feeder is mounted on the frame, the engaging recess of the support plate and the locking lever are locked by the locking pin. And is securely locked to the locking pin. Therefore, the paper feeding device can be securely latched and held on the frame without play.

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

As shown in FIG. 1, a frame 1 of the printer includes a casing 2 made of a synthetic resin having an open upper surface, a chassis 3 made of a steel plate disposed in the casing 2, and a composite mounted on the casing 2. And a cover 4 made of resin. The platen 5 is rotatably supported on both side plates of the chassis 3, and a guide rod 6 as a guide member is provided between both side plates of the chassis 3 so as to extend in parallel along the longitudinal direction of the platen 5. I have. The carriage 7 is supported on a guide rod 6 so as to be able to reciprocate, and a print head 8 for printing on print papers P1 and P2 on a platen 5 is mounted on an upper portion of the carriage 7 and a ribbon cassette 9
Is detachably mounted.

The paper guide 10 is formed on the casing 2 close to the outer periphery of the lower part of the platen 5. The paper guide 10 extends from the upper paper supply port 11 provided in the cover 4 along the paper guide 10.
The cut sheet printing paper P1 is supplied above. The rear paper supply port 12 and the lower paper supply port 13 are formed at the rear and lower parts of the casing 2, and the continuous printing paper P2 is supplied onto the platen 5 from these paper supply ports 12 and 13. Paper exit 14 is cover 4
And a print head 8 on the platen 5.
Printing paper P1 and P2 printed by
Emitted from 4.

The paper feeder 15 is detachably attached to the chassis 3 of the frame 1 and, as shown by a solid line in FIG. 1, a position facing the paper discharge port 14 on the paper feed side with respect to the platen 5, and a chain line in FIG. As shown in the figure, the position can be changed to a position facing the rear paper supply port 12 on the paper feeding side of the platen 5. And the paper feeder 15
Is arranged on the paper feed side with respect to the platen 5, the continuous printing paper P2 supplied from the bottom surface side of the casing 2 through the lower paper supply port 13 passes through the printing position on the platen 5, The paper is fed from the paper discharge port 14 by the paper feeder 15. In addition, the paper feeder 15 is
When the paper feed side is arranged on the paper feed side, the continuous printing paper P2 is fed from the rear paper supply port 12 onto the platen 5 by the paper feed device 15, and discharged from the paper discharge port 14 after passing the printing position. Is done.

As shown in FIG. 1 and FIG. 8, the introduction passage 16 is formed in the bottom surface of the casing 2 in a downwardly concave shape, leaving both side portions thereof. The end is open behind the casing 2.
When printing is performed by disposing the paper feeder 15 on the paper feed side with respect 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 the introduction passage 16.

As shown in FIG. 1 and FIG.
A pair of left and right support plates 19, a support rod 20 spanned between the two support plates 19, and rotatably supported via a bearing 21 between the two support plates 19 so as to extend in parallel with the support rods 20. Rotating shaft 22
And a pair of pin tractors 23 movably supported on a support rod 20 and a rotating shaft 22. Then, when the rotation shaft 22 is rotated in a state where the pin tractor 23 is engaged with the feed holes on both side edges of the continuous printing paper P2, the continuous printing paper P2 is fed through the pin tractor 23. You.

As shown in FIGS. 3 and 6, a pair of upper locking pins 24, 25 are provided on both outer surfaces of the chassis 3 so as to face the paper discharge port 14, and connect the paper feeder 15 to the platen 5. It constitutes a mounting portion and a fixing portion for mounting and fixing at a position on the paper feeding side. Each pair of lower locking pins 26, 27
Are provided on both outer surfaces of the chassis 3 so as to face the rear paper supply port 12, and constitute 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. .

The three engaging recesses 28, 29, 30 are formed at the tip, upper and lower portions of both support plates 19 of the paper feeder 15, respectively. Then, as shown in FIG.
When the “0” is engaged with the upper locking pins 24 and 25 of the chassis 3, the paper feeding device 15 is attached to a position on the paper feeding side with respect to the platen 5. Also, as shown in FIG. 6, another two engaging recesses 29, 30 are provided with lower locking pins 26, 27 of the chassis 3.
, The paper feeding device 15 is attached to a position on the paper feeding side with respect to the platen 5.

A pair of left and right locking levers 31 are rotatably supported on bearings 21 of a rotating shaft 22 on the outer surfaces of both support plates 19 of the paper feeding device 15 and one end thereof is detachably engaged with locking pins 25, 27. In addition to the hook portion 32, an engaging portion 33 that can be engaged with and disengaged from the locking pin 26 and an operating portion 35 that faces the finger hook 34 on the support plate 19 are provided at the other end. The springs 36 are respectively mounted between the latch lever 31 and the support plate 19, and as shown in FIGS. 3 and 6, the paper feeding device 15 is positioned at the paper feeding side or the paper feeding side with respect to the platen 5. In the attached state, the latch lever 31 is rotationally urged by the spring 36 to a position where the latch lever 31 is engaged with the locking pin 25 or the locking pins 26 and 27, so that the paper feeder 15 cannot fall off the chassis 3. It is latched and held.

As shown in FIG. 2 and FIG.
5, 26 and 27 have a tapered head 37 at the tip. When the paper feeder 15 is mounted at a position on the paper feed side or the paper feed side with respect to the platen 5, the taper head 37 of the locking pins 24 to 27 attaches the support plate 19 to the chassis 3 and The locking of the locking lever 31 with respect to 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 are directed forward from the rear end of the chassis 3. Extending diagonally upward. 3, when the paper feeder 15 is mounted at a position on the paper feed side with respect to the platen 5, the bearings 21 at both ends of the rotary shaft 22 engage with the guide grooves 38, and The feeding device 15 is guided obliquely upward from the rear of the chassis 3 toward the front,
As shown in FIG. 6, when the bearing 21 reaches the inner end of the guide groove 38, the paper feeder 15 is located behind the platen 5 at a position lower than its height.

In this embodiment, the lower locking pin 26 located above the guide groove 38 and the two supporting plates 19 of the paper feeder 15 are provided.
The holding means is constituted by the upper edge 39 of the paper feeder 15 and the paper feeder 15 is guided and moved to the inner end side of the guide groove 38 by the engagement between the bearing 21 and the guide groove 38 as shown by a chain line in FIG. When the upper edge 39 of the support plate 19 is engaged with the lower locking pin 26,
The paper feeder 15 is kept in the used state. The engagement piece 40 projects from the inside of the operating portion 35 of the both-latch lever 31 in the paper feeder 15, and guides the paper feeder 15 to the inner end side of the guide groove 38 as shown by a chain line in FIG. 3. When moved, this engagement piece 40
Engages with the upper edge of the rear end of the guide groove 38, and the locking lever 31 is rotated to the disengagement position prior to engagement with the lower locking pin 27.

As shown in FIGS. 5 and 7, the driving mechanism 43 is provided on the right outer surface of the chassis 3 and includes a motor 44 and a plurality of gears.
45, 46, 47. The platen gear 48 is fitted and fixed to the right end of a platen shaft 49 that supports the platen 5, and meshes with a gear 47 of a gear train. When the motor 44 is rotated, the platen 5 is rotated via the gears 45 to 47 and the platen gear 48, and the printing paper P
Feed is given to 1, P2.

As shown in FIG. 2, FIG. 5 and FIG.
Is fixed to the right end of the rotating shaft 22 on the outer surface of the right support plate 19 of the paper feeder 15. The connection gear 51 is a drive gear
The support shaft 52 is rotatably and axially movably supported on the outer surface of the right support plate 19 by a support shaft 52 so as to be removably engaged with the drive gear 50. Have been.

Then, as shown in FIG. 5, when the paper feeder 15 is mounted at a position on the paper feed side with respect to the platen 5, the connecting gear 51 is meshed with the platen gear 48, and the rotation of the platen gear 48 causes the connecting gear 51 to rotate. The driving force is transmitted to the rotating shaft 22 via the driving gear 50, and the pin tractor 23 is rotationally driven. As shown in FIG. 7, when the paper feeder 15 is mounted at a position on the paper feed side with respect to the platen 5,
The connecting gear 51 is meshed with the gear 47 of the gear train, and the rotation of the gear 47 is transmitted to the rotating shaft 22 via the connecting gear 51 and the driving gear 50, and the pin tractor 23 is driven to rotate.

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

FIGS. 1, 3, and 5 show a state in which the paper feeder 15 is attached to a position on the paper feed side with respect to the platen 5. FIG. In this state, the paper feeder
The engaging recesses 28, 30 of both support plates 19 on the 15 side engage with the upper locking pins 24, 25 on both sides of the chassis 3, and the two locking levers 3
The first hook portion 32 is engaged with the upper locking pin 25, and the paper feeder 15 is hooked and held on the chassis 3.
In this state, the connection gear 51 on the paper feeder 15 side is meshed with the platen gear 48.

Therefore, in this state, the continuous printing paper P2 is inserted into the lower paper supply port.
When the printer is activated after passing from 13 to the print position on the platen 5 and the paper discharge port 14 and set in the pin tractor 23 of the paper feeder 15, the print head 8 at the print position on the platen 5 While printing is performed on the printing paper P2, the gears 45 to 48 are driven by the motor 44 of the driving mechanism 43.
The platen 5 is rotated via the platen shaft 49, and the pin tractor 23 is rotated via the gears 51 and 50 of the paper feeder 15 and the rotating shaft 22, so that the continuous printing paper P2 is placed on the platen 5. Pulled out of the print position.

At this time, the lower paper supply port 13 is
Since the introduction passage 16 communicating with the printer is provided, even if the printer is mounted on the upper surface of a normal desk or the like, the casing 2
The lower paper supply opening 13 on the bottom surface of the housing 2 is opened to the rear of the casing 2 via the introduction passage 16. Therefore, the casing 2
There is no need to use a special desk or the like that has an opening for paper supply in the top plate part corresponding to the lower paper supply port 13 on the bottom of the
From the rear of the casing 2, the continuous printing paper P2 is
Further, the print position on the platen 5 can be introduced through the lower paper supply port 13 without any trouble.

When the paper feed device 15 is rearranged from the position on the paper feed side with respect to the platen 5 to the position on the paper feed side, in the state shown in FIG. 3 and FIG. When the operation portion 35 of the 31 is rotated rearward, the hook portion 32 of the latch lever 31 is disengaged from the upper locking pin 25, and the locking of the paper feeder 15 to the chassis 3 is released. Therefore, when the paper feeder 15 is lifted from above the chassis 3 in this state, the engagement recesses 28, 30 of both support plates 19 are disengaged from the upper locking pins 24, 25, and the paper feeder 15 can be removed. .

Thereafter, as shown by a chain line in FIG. 3, when the paper feeder 15 is moved forward with the dual bearings 21 of the paper feeder 15 engaged with the guide grooves 38 of the chassis 3, the paper feeder is moved. 15 is guided obliquely upward from the rear of the chassis 3 to the front along the guide groove 38. When the bearing 21 reaches the inner end of the guide groove 38, as shown in FIG. Behind the platen 5, it is arranged at a position lower than its height position.

When the paper feeder 15 is guided toward the inner end of the guide groove 38, the upper edge 39 of the support plate 19 is
26, the paper feeder 15 is held in use, and the engaging piece 30 of the locking lever 31 is engaged with the upper end of the rear end of the guide groove 38, and the locking lever 31 is moved downward. Prior to the engagement with the locking pin 27, it is rotated to the disengaged position. For this reason, the user does not need to operate the latch lever 31, and the paper feed device 15
When attaching the paper feeder 15 to the chassis 3 from the rear to the front, it is not necessary to keep the posture of the paper feeder 15 in the used state, and the paper feeder 15 can be mounted extremely easily. Therefore, when the paper feeding device is generally mounted at the paper feeding position, the mounting work is performed in a groping state without going around the printer, but in such a case, the work can be performed easily and quickly. .

When the paper feed device 15 reaches the inner end of the guide groove 38 as described above, the engagement recesses 29 and 30 of the support plates 19 on the paper feed device 15 side are moved to the chassis 3 as shown in FIG. The hooks 32 and the engaging portions 33 of the both-latch levers 31 engage the lower locking pins 27 and 26, respectively, and the paper feeder 15 At a position on the paper feed side with respect to the chassis 3. At this time, as shown in FIG.
The gear 51 meshes with the gear 47 of the gear train in the drive mechanism 43.

Therefore, in this state, the continuous printing paper P2 is inserted into the rear paper supply port.
When the printer is operated after setting the pin feeder 23 of the paper feeder 15 through the printing position on the platen 5 and the paper discharge port 14 from 12, the gears 45 to 48 and the platen shaft are driven by the motor 44 of the drive mechanism 43. The platen 5 is rotated via 49, and the pin tractor 23 is rotated via the gears 51 and 50 of the paper feeder 15 and the rotating shaft 22, so that the continuous printing paper P2 is sent to the printing position on the platen 5. While printing, printing is performed by the print head 8 on the continuous printing paper P2.

During this printing operation, as described above,
15 is located at a position lower than the height position behind the platen 5, the printing head 8 is positioned on the platen 5 from the position where the continuous printing paper P <b> 2 sent by the paper feeder 15 contacts the platen 5. Accordingly, the contact length in the circumferential direction up to the position where printing is performed on the continuous printing paper P2 is shortened, and the occurrence of jams in the continuous printing paper P2 that contacts the platen 5 can be reduced.

In this embodiment, as shown in FIG. 4, since the upper locking pins 24, 25 and the lower locking pins 26, 27 are provided with tapered heads 37 at the tips thereof, Feeder 15
When the frame is mounted on the chassis 3 of the frame 1, the engagement recesses 28, 29, 30 of the support plate 19 and the hook portion 32 and the engagement portion 33 of the latch lever 31 engage with the tapered head 37. And lock pin 24 ~
Locked securely to 27. Therefore, the paper feeder 15 can be firmly latched and held on the chassis 3 without play.

The present invention is not limited to the configuration of the above-described embodiment, and includes, for example, a mounting portion for mounting the paper feeding device 15 and a fixing portion for hooking the locking lever 31 of the paper feeding device 15. The configuration of each unit may be arbitrarily changed and embodied without departing from the spirit of the present invention, such as by appropriately changing the configuration.

[Effects of the Invention] Since the present invention is configured as described above, it has the following excellent effects.

According to the first aspect of the present invention, the locking lever for locking the paper feeder to the frame of the printer is supported on the support plate so as to be rotatable on the rotating shaft. Simplification can reduce the number of parts, and the operating portion of the latch lever can be freely protruded in any direction, so that the operating position can be set arbitrarily without limitation. it can.

According to the second aspect of the present invention, since the fixing portion provided on the frame side so as to be engaged with and disengaged from the locking lever is constituted by a locking pin having a tapered head, the tapered head is provided. By the action of the portion, the engaging concave portion of the support plate and the engaging lever are securely engaged with the engaging pin, and the paper feeding device can be firmly engaged and held on the frame without play.

[Brief description of the drawings]

1 is a partial sectional view showing an embodiment of a printer embodying the present invention, FIG. 2 is a partial front view showing the paper feeder, and FIG. 3 is a position of the paper feeder on a paper feed side with respect to a platen. FIG. 4 is an enlarged partial cross-sectional view showing a locking pin for hooking the paper feeder to the frame, and FIG. 5 is a paper feeder for feeding the paper feeder to a platen. FIG. 6 is a partial side sectional view showing a driving configuration in a state where the paper feeder is attached to a platen, and FIG. FIG. 8 is a partial side sectional view showing a driving configuration, and FIG. 8 is a sectional view showing an introduction passage portion connected to a paper supply port on the bottom surface of the frame. 1 ... frame, 5 ... platen, 8 ... print head,
15 ... paper feeder, 19 ... support plate, 22 ... rotary shaft, 23 ...
... pin tractors, 24 to 27 ... locking pins that constitute the mounting portion and fixing portion, 28 to 30 ... engaging recesses, 31 ... locking levers,
37: Tapered head, P1: Single-sheet printing paper, P2: Continuous printing paper.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-51369 (JP, A) JP-A-60-52376 (JP, A) Real opening Sho-61-192852 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) B65H 20/00-20/40 B41J 11/00-11/70

Claims (2)

(57) [Claims] 1. A frame (1) having a platen (5) extending in one direction and reciprocating along the longitudinal direction of the platen (5) to form printing paper (P1, P2) on the platen (5). On the other hand, in a printer supporting a print head (8) for performing printing and also having a frame (1) detachably provided with a paper feeder (15), the frame (1) is provided with a paper feeder (15). ) Are provided at the positions on the paper feed side and the paper feed side with respect to the platen (5), and the paper feed device (15) can be rearranged between the two positions. The device (15) includes a pair of left and right support plates (19),
Rotating shaft (22) rotatably supported between both support plates (19)
And a pin tractor (23) provided on the rotation shaft (22) for engaging with a feed hole of the printing paper (P2) to apply feeding to the printing paper (P2). ), The rotation shaft (22) has a position between the position where the paper feed device (15) is hooked on the fixing portion (25, 27) of the frame (1) and the position where it is released therefrom. A printer which is provided with a locking lever (31) which can be rotated and which prevents the paper feeder (15) from dropping from the frame (1) in a locked state. 2. A fixing portion provided on the frame (1) is provided with a locking pin (28-30) which is engaged with an engaging concave portion (28-30) formed on a support plate (19) of the paper feeder (15). 24, 25, 26, 27) and a tapered head (37) for guiding the support plate (19) is provided at the tip of the locking pin (24, 25, 26, 27). Item 1. The printer according to Item 1.