JPH0420060Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a printing machine used in a cash register, etc., and in particular has a paper feeding mechanism in which a roller for feeding the paper is movable between an activated state and an inactive state. Regarding printing machines.

[Prior Art] Printing machines for cash registers generally print on receipts handed to customers and journals for recording sales, but they do not only print on paper on the receipt side; In order to perform stamping and cutting operations, in addition to a printing drive roller and a pressure roller that presses against the printing drive roller provided on the paper feed side of the printing point, a feed roller for slump and cutting and a pressure roller that presses against it. There was one that was installed closer to the paper feed side than the printing point. In addition, for devices that use an ink ribbon for the printing mechanism, the user needs to replace the ink ribbon at regular intervals, so when replacing the ink ribbon, the user opens the cover and then removes the drive roller and pressure contact. The ink ribbon was exchanged by passing the ink ribbon between the feed roller and the pressure roller with the rollers spaced apart from each other and in an inactive state. However, after this replacement, the user forgot to return the feed roller and pressure roller to working condition, and restarted the printing machine even though cutting and paper feeding to the stamp side were not performed properly. It has the disadvantage that situations often occur where it is lost.

Furthermore, as shown in, for example, Japanese Utility Model Application Publication No. 57-34447, a device has been proposed in which the recording paper is switched between being released and held in conjunction with opening and closing of the cover. However, in this device, the recording paper is automatically released from being held when the cover is opened. Therefore, even if the cover is opened inadvertently due to a factor that does not require release of the paper, the paper may be released from the paper and the printing position may be misaligned.

[Purpose] The present invention was made to eliminate the drawbacks of the conventional method, and the first purpose is to prevent forgetting to return the feed roller and the pressure roller from an inactive state to an operating state. Our goal is to provide printing machines.

A second object of the present invention is to provide a printing machine in which the printing position will not be distorted even if the cover is opened carelessly.

[Solution Means] Therefore, the present invention includes a printing mechanism that prints on paper at a printing point, a drive roller and a pressure roller that is pressed against the drive roller,
A paper feeding mechanism that transports paper to a printing point, a feeding roller disposed on the paper feeding side with the printing point in between with respect to the drive roller, and a pressure roller that is pressed against the feeding roller, and the paper is printed. a paper feed mechanism that feeds paper from a point, a first position in which the pressure roller is in pressure contact with the feed roller, and a second position in which the pressure roller is spaced apart from the feed roller; Said first
a support member that supports the position by the action of a spring;
a manually operated operating lever for moving the supporting member to the second position against the springing force; and an operating lever that engages when the operating lever is operated to move the supporting member against the springing force. an opposing pair that is held in the second position by resisting, an openable and closable cover that covers the printing mechanism, and an opposing pair that moves in contact with the cover when the cover is closed; It is characterized by comprising an operation part for releasing the engagement.

[Embodiment] The details will be explained below with reference to the drawings showing an embodiment in which this invention is embodied in a cash register.

In the figure, a platen 2 and a shaft 5 are fixed to a machine frame 1, and a carriage 4 to which a print head 3 is fixed is installed so as to be movable back and forth along the shaft 5. Further, an ink ribbon cassette 6 is detachably attached to the machine frame 1, and after the ink ribbon 7 is supplied from the ink ribbon cassette 6 between the platen 2 and the printing head 3,
The ink ribbon is stored in the ink ribbon cassette 6 again. As described above, the printing mechanism 10 that prints on paper at the printing point P is configured, and a known printing operation is performed.

Further, in the machine frame 1, below the printing point P, there is a drive roller 1 extending parallel to the platen 2 and interlocked with a drive mechanism (not shown).
1 is supported. Two support frames 12 extending parallel to the drive roller 11 are pivotally supported on the machine frame 1 by a shaft 13.
A pressure roller 14 is rotatably supported on each of the pressure rollers 14, and their support frames 12 are biased counterclockwise in FIG. 2 by springs (not shown). It is pressed against the drive roller 11.

The paper feeding mechanism 15 is configured as described above, and the paper is transported to the printing point P. Here, one of the pressure rollers 14 supported by the support frame 12 is used to transport a recording journal, and the other 14 (on the right side in FIG. 1) is used to transport a recording journal. This is for transporting receipt paper to be handed over.

Next, the paper feed mechanism 24 for transferring the receipt paper to the outside of the machine frame 1 will be explained.

As shown in FIGS. 2 and 3, a guide plate 17 is installed on the machine frame 1 and extends upward from the platen 2.
A guide portion 171 for journals and a guide portion 172 for receipts are formed. Further, the machine frame 1 is arranged opposite to the journal guide part 171.
An auxiliary guide 16 is integrally formed with the auxiliary guide 16. A feed roller 18 extending parallel to the drive roller 11 is supported on the guide portion 172 above the printing point P, and the feed roller 18 is rotated in conjunction with the drive mechanism. On the other hand, a support piece 19 is erected on the machine frame 1, and at the upper end of this support piece 19, a pair of left and right substantially L-shaped support members 21 are connected to each other by a shaft 20, as shown in FIG. As shown in FIG. 3, it is rotatably supported around a shaft 20. A pressure roller 22 extending parallel to the feed roller 18 is rotatably supported at one end of each of the pair of left and right support members 21, and a first pressure roller 22 whose one end is locked to the support piece 19 is rotatably supported at the other end. A spring 22 is locked, and the support member 21 is biased counterclockwise in FIG. 2 by the action of the first spring 22, and the pressure roller 23 is pressed against the feed roller 18. The paper feed mechanism 24 feeds the receipt paper from the printing point P as described above.
is configured.

Further, a solenoid 25 is installed in the machine frame 1, and the solenoid 25 is connected to a plunger 25.
1, the tip of the plunger 251 is formed into a bifurcated shape, and the bifurcated portion 252 has a pin 2.
53 is entered. An extending portion 211 provided on the left side in FIG. 1 of the pair of left and right supporting members 21 is inserted between the bifurcated portion 252 and the pin 253. 252 and the pin 253.

Therefore, when the solenoid 25 is energized, the plunger 251 is retracted and moved to the upper left in FIG. is rotated clockwise against the urging force of. As described above, this support member 21 has two positions: a first position (operating position) in which the pressure roller 23 is in pressure contact with the feed roller 18 and a second position in which the pressure roller 23 is separated from the feed roller 18. (non-operating position), and this pressing roller 23 is always in pressure contact with the feeding roller 18.

In FIG. 1, on the left side of the solenoid 25 are first and second operating levers 2 as holding bodies.
6 and 27 are mounted on the machine frame 1, and this first operating lever 26
has a first manual operation part 261 formed at one end, and an engagement piece 262 extending downwardly of the plunger 251 at the other end, and an engagement piece 262 extending substantially perpendicularly to the engagement piece 262 as shown in FIG. 1 at the other end. plunger 251
a small piece 26 extending so as to be able to engage with a pin 253 of the
3 are bent.

Further, as shown in FIG. 1, the second operating lever 27 is pivotally supported by the support base 28 on the right side of the first operating lever 26,
A manual operation part 271 is formed at one end, and the engagement piece 262 extends leftward at the other end.
A locking portion 272 that can be engaged with is integrally formed. This locking portion 272 has one end attached to the support base 272.
Since the second spring 30 is locked, the second operating lever 27 is always biased clockwise in FIG. In addition, the first
Since the third spring 31, one end of which is locked to the locking portion 272 of the second operating lever 27, is locked to the operating lever 26, the first operating lever 26 is rotated as shown in FIG. It is always urged clockwise in the state shown in FIG. 2, and is engaged with the upper end of the auxiliary guide 16.

Here, a cover 35 that covers the printing mechanism 10 and the like is pivotally supported on the machine frame 1 so as to be openable and closable.
On the bottom surface of the cover 35, as shown in FIG.
When the second operation lever 27 is closed, the second
An engaging portion 37 that engages with the manual operating portion 271 and rotates the second operating lever 27 in the counterclockwise direction in FIG. 2 is integrally formed. The engaging portion 37 functions as a return means for returning the pressure roller 23, which is located at a distance from the feed roller 18, to the pressure contact position.

In FIG. 1, a known stamp and cutting mechanism for printing and cutting stamps on receipt paper is installed on the machine frame 1 to the right of the solenoid 25.

The operation of the printing machine configured as described above will now be explained.

When the user wants to replace the ink ribbon cassette 6 in the usage state shown in FIG.
First, open the cover 35. Next, when the first manual operation part 261 of the first operation lever 26 is pressed to the left in FIG.
The small piece 263 is rotated counterclockwise against the biasing force of the spring 31, and the small piece 263 pushes the plunger 251 through the pin 253. As a result, the support member 21
The extending portion 211 is rotated clockwise in FIG. 2 via the pin 253 against the first spring 22, and the pressing roller 23 is separated from the feed roller 18. At this time, as the first operating lever 26 rotates counterclockwise, the second operating lever 27, on which the locking portion 272 has been locked until now, is moved to the second operating lever 27. The second operating lever 2 is rotated clockwise in FIG. 2 by the action of the spring 30.
The lower end of 7 is the engagement piece 262 of the first operation lever 26.
It is abutted on top. After that, the first operating lever 26
When the pressure is released, the engaging piece 262 is engaged with the locking portion 272 of the second operating lever 27, and as shown in FIG. It is held in a supported position.

Next, the user inserts the ink ribbon cassette 6 into the machine frame 1.
At the same time, the ink ribbon 7 is passed between the pressure roller 23 and the feed roller 18 to reach the printing point P.
After removing the previously used ink ribbon cassette 6, a new ink ribbon cassette 6 is attached, and the ink ribbon 7 is placed at the printing point P again.

Thereafter, when the user closes the cover 35, the engaging portion 37 presses the second manual operation portion 271 of the second operation lever 27 downward. As a result, the second operating lever 27 is rotated counterclockwise in FIG.
The first operating lever 26 is disengaged from the engaging piece 262, and the first operating lever 26 is rotated clockwise in FIG. 2 and comes into contact with the auxiliary guide 11. As a result, the support member 21 is connected to the first spring 22.
The press roller 23 is rotated counterclockwise as shown in FIG. 2, and the press roller 23 is brought into pressure contact with the feed roller 18, making restart possible.

[Effects] As explained above, the present invention is capable of returning the inactive roller to the operating state based on the closing of the cover. This has the effect of preventing forgetting work.

Furthermore, in the printing machine of the present invention, even when the cover is opened, the recording paper remains clamped, and the clamping is released only by operating the operating lever. Therefore, even if the cover is opened carelessly due to factors that do not require opening, the printing position will not shift. Further, once the operating lever is operated, the engagement pair maintains that state even if the operating lever is released, making it easy to perform tasks such as replacing the ink ribbon.

[Brief explanation of the drawing]

The drawings show an embodiment embodying the present invention; FIG. 1 is a plan view showing the support member in the first position, FIG. 2 is a cross-sectional view taken along the line A-A in FIG.
FIG. 3 is a sectional view corresponding to FIG. 2 showing a state in which the support member is held at the second position. In the figure, 1 is the machine frame, 10 is the printing mechanism, 11
1 is a drive roller, 14 is a pressure roller, 15 is a paper feed mechanism, 18 is a feed roller, 21 is a support member, 23 is a pressure roller, 24 is a paper feed mechanism, 26 is a first operating lever (holding body), 27 is a 2nd operation lever (holding body), 35 is a cover, 3
7 is an engaging portion, and P is a printing point.

Claims (1)

[Claims for Utility Model Registration] 1. A printer comprising a printing mechanism 10 that prints on paper at a printing point P, a drive roller 11 and a pressure roller 14 that is pressed against the drive roller 11, and which moves the paper to the printing point P. a paper feeding mechanism 15 for transporting the paper; and a feeding roller 18 disposed on the paper feeding side with respect to the drive roller 11 across the printing point P.
and a press roller 23 that is pressed against the feed roller 18, and feeds the paper from the printing point P; a first position where the press roller 23 is pressed against the feed roller 18; Pressing roller 23
a support member 21 that is movably supported at a second position spaced apart from the feed roller 18 and normally supported at the first position by the action of a spring;
an operating lever 26 that is manually operated to move the supporting member 21 to the second position against the springing force; and an operating lever 26 that is engaged when operating the operating lever 26 and moves the supporting member 21 to the second position. an engaging pair 262, 272 that holds the printing mechanism 21 in the second position against the spring force; a cover 35 that can be opened and closed to cover the printing mechanism 10; The engagement pair 262, 272 moves in contact with the cover.
A printing machine characterized by comprising: an operation section 27 for disengaging the . 2. The printing machine according to claim 1, wherein the cover 35 is rotatably supported by the machine frame 1.