JPH10101252A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make exchanging work of a roll paper simple by mounting a roll paper storing part storing for paying out a printing roll paper in a movable frame such that the storing part moves frontward when the frame is opened interlocking with opening and closing action of the movable frame. SOLUTION: An open holding member 19 of a plate spring is mounted on substantially center upper part of a fixed frame and an open holding member 20 is mounted in base end side lower part of a movable frame 2. shaped engaging parts 19a, 20a are mounted relatively corresponding each other in the open holding member 19 and the open holding member 20 and The movable frame 2 is relatively engaged by the engaging parts 19a, 20a with the frame opened and the movable frame 2 is held at open position. As the movable frame 2 is held at the open position by an open holding mechanism, it is not necessary to hold the movable frame 2 at the open position by hand and a series of operation of taking in and out of the roll paper, pulling out of a new roll paper and closing of the movable frame may be performed smoothly and rapidly by using both hands.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer incorporated in a register (cash register) or the like.

[0002]

2. Description of the Related Art Conventionally, as a printing apparatus of this type, as disclosed in Japanese Patent Publication No. Hei 6-43224, a frame portion of the apparatus is provided to facilitate processing at the time of paper jam.
It consists of a fixed frame and a movable frame pivotally attached to the fixed frame so as to be openable and closable (rotatable). A print head (thermal head in the case of a thermal printer) for printing and a platen roller are divided into these two frames. What is provided is known.

[0003]

However, according to this conventional apparatus, the roll paper is merely stored in a state where it is simply placed in a roll paper storage section provided on a fixed frame. The roll paper storage unit is located at the innermost position of the device where it is difficult to access from the front. The problem of having trouble was left.

Accordingly, the present invention is to provide a printing apparatus capable of easily performing a roll paper exchange operation.

[0005]

According to a first aspect of the present invention, there is provided a fixed frame, and a movable frame pivotally attached to the fixed frame so as to be openable and closable. In the printing apparatus in which the platen rollers are provided respectively, the roll frame accommodating section for accommodating the roll paper for printing is capable of being fed out in the movable frame, interlocking with the opening and closing operation of the movable frame, and when the frame is opened, the front side is opened. It is provided in a state where it moves.

According to a second aspect of the present invention, in the configuration of the first aspect, the fixed frame is disposed on the lower side and the movable frame is disposed on the upper side, and the roll paper accommodating portion is turned forward and upward when the movable frame is opened. It is provided integrally with the movable frame in a moving state.

According to a third aspect of the present invention, in the configuration of the first or second aspect, an open position holding means for holding the movable frame at the open position is provided.

According to a fourth aspect of the present invention, in the configuration of any one of the first to third aspects, the roll paper storage section is configured to store roll paper in a mounted state, and the roll paper in the roll paper storage section is provided. A stopper for suppressing the forward movement of the paper is provided.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the stopper is rotatable, and the forward movement of the roll paper can be suppressed by its own weight when the roll paper has a predetermined diameter or less. It is constituted in.

According to a sixth aspect of the present invention, in the configuration of any one of the first to fifth aspects, a first accommodating portion accommodating a roll paper for ejection is provided as a roll paper accommodating portion of the movable frame; A second storage section for storing paper; and a take-up roller for winding the unwinding portion of the storage roll paper is provided on the movable frame in a state where its rotation center coincides with the open / close center of the movable frame. It was done.

According to the above arrangement, when the movable frame is opened, the roll paper accommodating portion protrudes toward the front side in conjunction with the opening. For this reason, the roll paper can be taken in and out quickly and easily on the entrance side having a large opening amount.

In particular, according to the configuration of the second aspect, the roll paper accommodating portion protrudes forward and upward, that is, toward the center of the entrance, so that the roll paper can be more easily taken out, and the work of replacing the roll paper becomes easier.

According to the third aspect of the present invention, since the movable frame is held in the open position, it is not necessary to hold the frame in the open position by hand, so that roll paper can be taken in and out, new roll paper can be pulled out, and movable. A series of operations for closing the frame can be performed smoothly and quickly using both hands.

By the way, in this type of printing apparatus, a sensor for detecting the end (end of feeding) or near end (immediately before end) of the roll paper is provided in the roll paper storage section.

On the other hand, when the roll paper is stored only in the roll paper storage section, the roll paper can roll back and forth due to the pulling force applied when the roll paper is fed or when the fed portion is cut. There is. In this case, the rolling of the roll paper at this time may cause the sensor to erroneously detect the end or near end of the roll paper.

In this regard, according to the structure of the fourth aspect, the stopper prevents the roll paper from moving forward, so that erroneous detection of the sensor can be prevented.

Here, the above-mentioned rolling of the roll paper before and after occurs mainly when the above-mentioned pulling force acts while the roll paper diameter is reduced and its own weight is reduced.

In this respect, according to the structure of the fifth aspect, the stopper is rotatable by its own weight, and when the roll paper diameter becomes equal to or smaller than a predetermined diameter, the stopper acts by its own weight. The length of the stopper can be minimized as compared with the case where the stopper function is performed from the beginning of use. Therefore, the space occupied by the stopper can be reduced.

According to a sixth aspect of the present invention, there is provided a so-called two-sheet type printing apparatus for simultaneously printing on two roll papers for embossing and storage, wherein the recording paper for storage is wound when the movable frame is opened. Since the position of the take-off roller does not change, the slack of the recording paper for storage can be reduced.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

In this embodiment, the object of application is a thermal printer incorporated in a register, which is used for receipt issuance (launching) and journal (storage).
Two roll paper (thermal paper)
A printer that prints on these at the same time is taken as an example.

Reference numeral 1 denotes a fixed frame.
The movable frame 2 is pivoted between a closed position shown in FIG. 1 to FIG. 3 and an open position shown in FIG. It can be opened and closed.

The fixed frame 1 is provided with a thermal head 4 at the front end, and the movable frame 2 is provided with a platen roller 5 at the front end, and they come into contact with the movable frame 2 closed.

In the movable frame 2, a first roll paper storage section 6 in which a roll paper A for ejection is placed and stored, and a second roll paper in which a roll paper (journal paper) B for storage is placed and stored. The storage portions 7 are provided side by side, and the roll papers A and B are fed out of the storage portions 6 and 7 and passed between the thermal head 4 and the platen roller 5 to print.

The roller shaft 5a of the platen roller 5
Is driven to rotate by a feeding drive mechanism using a motor (not shown) as a drive source, and the rolls 5 are rotated to discharge printed roll paper A and B to the outside.

The roll paper storage sections 6 and 7 are small box-shaped rear supports 8 for supporting the roll paper A and B from the rear side, respectively.
And a lower support 9 for supporting the roll papers A and B from below. The rear support 8 is fixed to the movable frame 2.

As a result, the roll paper storage units 6, 7 rotate integrally with the movable frame 2 when the movable frame 2 is opened and closed, and when opened, move from the back of the apparatus to the front side as shown in FIG. Has become.

In this way, as shown in FIG. 4, when the movable frame 2 is opened and the roll papers A and B are replaced, the roll papers A and B protrude forward. It can be done quickly and easily on the large inlet side.

Further, since the roll paper accommodating portions 6 and 7 are moved forward and upward, that is, toward the center of the entrance by the rotational movement, the roll papers A and B can be more easily taken out, and the roll paper exchange operation can be performed more easily. It's easy.

The lower support 9 is formed by bending a wire into a U-shape, and has a rear end pivotally supported by the rear support 8 to be rotatable.

The fixed frame 1 has a lower guide wall 10 for supporting the lower support 9 from below, and roll paper A,
Side guide walls (only one side is shown) 11 are provided to guide B by sandwiching B from both right and left sides.

This device is provided with the following mechanism.

Stopper 12 Since both roll papers A and B are stored in a state of being merely placed in roll paper storage portions 6 and 7, there is a possibility that they roll forward and backward due to the pulling force. In particular, this movement
This is likely to occur when the diameter of the roll paper A and B is reduced (the weight is reduced) as the drawing of the roll paper proceeds.

When this occurs, a sensor (not shown) for detecting the end or near end of the roll paper A, B (for example, attached to the rear support member 8) detects the rolling of the roll paper A, B at this time. End or near end may be erroneously detected.

Therefore, a stopper 12 for suppressing the rolling of the roll papers A and B in the front-rear direction is provided behind the roll papers A and B.

The stopper 12, like the lower support 9, is formed by bending a wire into a U-shape, and has a lower end pivotally supported by the rear support 8 to be rotatable.

When the roll paper A, B has a small feeding amount and a large diameter, the stopper 12 can be used as shown in FIGS.
As shown in FIG. 5, the roll papers A and B come into contact with the rear sides thereof in an upright state. In this state, the stopper function does not work.

As the roll papers A and B are advanced and the diameter of the roll papers A and B is reduced, the stopper 12 rotates in the forward tilting direction by its own weight as shown in FIGS. Contacts the upper surface of the roll paper.

Thus, the stopper 12 presses the roll papers A and B from above by its own weight, and suppresses the forward and backward movements of the roll papers A and B.

Accordingly, by setting the shape, dimensions, and the like of the stopper 12 in accordance with the diameter at which the roll papers A and B start rolling, the rolling of the roll papers A and B is suppressed, and the sensor is erroneously detected. Can be prevented.

Further, when the roll paper diameter becomes equal to or smaller than a predetermined diameter, the stopper action is performed by the weight of the stopper, so that the stopper 12 is lengthened to perform the stopper action from the start of using the roll paper. In comparison, the length of the stopper 12 can be minimized. For this reason, the space occupied by the stopper 12 can be reduced.

It should be noted that the stopper 12 is not rotated backwards than the upright posture shown in FIGS.
A wire spring (shown in FIGS. 5 to 7) 13 is provided at the pivotal portion of.

Closed Lock Mechanism (See FIGS. 2, 3, 4, and 8) A lock frame 14 is pivotally supported on the front end of the fixed frame 1 so as to be rotatable about a horizontal shaft 15.

The lock frame 14 is provided over substantially the entire width of the fixed frame 1. When the movable frame 2 is closed, the locking portions 14a provided at the upper left and right ends of the lock frame 14 are provided with platen roller shafts. The movable frame 2 is locked in a closed state by being locked to the left and right ends of the 5a from above.

On the other hand, when the movable frame 2 is to be opened, the lock frame 14 may be rotated forward as shown by the imaginary line in FIG. 8 to release the locking portion 14a from the platen roller shaft 5a.

In FIGS. 1, 3, 5, and 8, reference numeral 15 denotes a handle for this unlocking operation; in FIG. 8, reference numeral 16 denotes a tension spring for urging the lock frame 14 in the locking direction; A stopper 18 stops at the lock position, and a stopper 18 stops at the unlock position.

Open holding mechanism (see FIG. 8) An open holding member 19 made of a leaf spring is provided substantially at the upper center of the fixed frame 1, and an open holding member 20 is provided at a lower portion on the base end side of the movable frame 2.

The open holding body 19 and the open holding member 20 are provided with corresponding U-shaped engaging portions 19a and 20a, respectively. When the movable frame 2 is opened, these engaging portions 19a and 20a are provided. Are engaged with each other to hold the frame 2 in the open position.

When the movable frame 2 is rotated in the closing direction from this state, the open holding member 19 bends forward and the holding member 19 and the open holding member 20 are disengaged.

As described above, since the movable frame 2 is held at the open position by the opening and holding mechanism, it is not necessary to hold the frame 2 at the open position by hand, so that the roll papers A and B can be taken in and out, and the new roll paper can be pulled out. A series of operations for closing the movable frame can be performed smoothly and quickly using both hands.

The take-up roll paper A, after printing, as shown in FIG.
It is discharged forward and cut off by a cutting blade (not shown) provided on the fixed frame 1.

On the other hand, the unwinding portion of the storage roll paper B is turned from the front to the rear, and is sequentially wound by a winding roller 21 provided on the upper rear end side of the movable frame 2.

As shown in FIGS. 1 and 3, the take-up roller 21 is rotatably supported by the shaft portions 21a, 21a at the left and right ends thereof, and is rotatably supported by the movable frame 2. (Not shown) to automatically wind up the unwinding portion of the roll paper B.

By the way, the roll paper B is
When the roll paper A is moved forward together with the roll paper A, the distance between the feeding point of the roll paper B and the winding roller 21 is reduced, and the fed roll paper B is slackened accordingly.

Here, as shown in FIGS. 1 and 3, the take-up roller 21 has its rotation center (center of the shaft portion 21a) O coincident with the opening / closing center of the movable frame 2 (center of the shaft portion 3). Is provided.

In this way, the position of the take-up roller 21 does not fluctuate when the movable frame 2 is opened and closed, so that the slack of the fed roll paper B can be reduced.

For this reason, when the movable frame 2 is closed,
The unwinding portion of the roll paper B smoothly returns to its original state without slack, and no wrinkling or paper jam occurs.

Other Embodiments (1) In the above embodiment, the roll paper storage units 6, 7 are provided so as to rotate integrally with the movable frame 2. However, the storage units 6, 7 are connected to an interlocking mechanism (for example, a rack and The movable frame 2 may be linked to the movable frame 2 via a pinion, and may be configured to move in the front-rear direction in conjunction with the opening / closing operation of the frame 2.

(2) In the above embodiment, the thermal head 4 is provided on the fixed frame 1 and the platen roller 5 is provided on the movable frame 2, but conversely, the thermal head 4 is fixed on the movable frame 2 and the platen roller 5 is fixed. It may be provided on the frame 1.

(3) In the above embodiment, a so-called two-sheet type printing apparatus which simultaneously prints on a roll paper A for ejection and a roll paper (journal paper) for storage is taken as an example. The present invention can of course be applied to a one-sheet type printing apparatus for printing on only one roll paper.

(4) The present invention can be widely applied to thermal printers other than the register printers described in the above embodiments and printing devices other than the thermal printers.

[0062]

As described above, according to the present invention, in the opening / closing type printing apparatus, the roll paper accommodating portion for accommodating the roll paper is protruded forward when the frame is opened, in conjunction with the opening / closing operation of the movable frame. Since the roll paper is provided in the state, the roll paper can be taken in and out quickly and easily at the entrance side having a large opening amount.

In particular, according to the second aspect of the present invention, the roll paper accommodating portion protrudes forward and upward, that is, toward the center of the entrance, so that the roll paper can be more easily taken out, and the work of replacing the roll paper becomes easier.

According to the third aspect of the present invention, since the movable frame is held at the open position, it is not necessary to hold the frame at the open position by hand. A series of operations for closing the frame can be performed smoothly and quickly using both hands.

On the other hand, according to the invention of claim 4, since the forward movement of the roll paper can be suppressed by the stopper, erroneous detection of the sensor for detecting the end or near end of the roll paper can be prevented.

In particular, according to the fifth aspect of the present invention, the stopper is rotatable, and when the roll paper diameter becomes equal to or smaller than a predetermined diameter, the stopper function is performed by its own weight. The length of the stopper can be reduced to a minimum as compared with the case where the configuration for performing the stopper action is adopted. Therefore, the space occupied by the stopper can be reduced.

According to a sixth aspect of the present invention, in a so-called two-sheet type printing apparatus for simultaneously printing on two roll papers for embossing and storing, a take-up for winding the recording paper for storage when the movable frame is opened. Since the position of the roller does not change, the slack of the recording paper for storage can be reduced.

For this reason, when the movable frame is closed, the roll paper feeding portion smoothly returns to the original state without slack, and wrinkles and paper jams do not occur.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a cross-sectional view showing a state where a movable frame is opened from the state shown in FIG. 2;

FIG. 5 is a diagram for explaining the operation of a stopper for suppressing forward movement of the roll paper, and is a side view in a state where the roll paper diameter is large.

FIG. 6 is a side view of a state where the roll paper diameter has been reduced from the state of FIG. 5;

FIG. 7 is a side view of a state where the roll paper diameter is further reduced from the state of FIG.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed frame 2 Movable frame 3 Shaft part as a center axis of opening and closing of a movable frame 4 Thermal head (print head) 5 Platen roller 6 1st accommodation part 7 2nd accommodation part 8 Rear support which constitutes both accommodation parts 9 Lower part Supporting member 12 Stopper 19 Opening holding member constituting opening holding means 20 Opening holding member 19a, 20a Engaging portion 21 Winding roller 21a Shaft portion as rotation center axis of winding roller O Rotation center of winding roller

Claims (6)

[Claims] 1. A printing apparatus comprising: a fixed frame; and a movable frame pivotally attached to the fixed frame so as to be openable and closable. A printing head is provided on one of the fixed frame and the movable frame, and a platen roller is provided on the other. ,
The movable frame is provided with a roll paper accommodating section for accommodating a roll paper for printing so as to be able to be fed out, and is provided in a state of moving forward when the frame is opened in conjunction with opening and closing operation of the movable frame. Printing device. 2. A fixed frame is provided on a lower side, and a movable frame is provided on an upper side, and a roll paper accommodating portion is provided integrally with the movable frame in a state of rotating forward and upward when the movable frame is opened. The printing device according to claim 1, wherein: 3. The printing apparatus according to claim 1, further comprising an open position holding means for holding the movable frame at the open position. 4. The roll paper storage section is configured to store roll paper in a mounted state, and a stopper is provided for suppressing forward movement of the roll paper in the roll paper storage section. The printing device according to claim 1. 5. The printing apparatus according to claim 4, wherein the stopper is rotatable and is configured such that the forward movement of the roll paper can be suppressed by its own weight when the roll paper has a predetermined diameter or less. A printing device, characterized in that: 6. The printing apparatus according to claim 1, wherein the movable frame includes a roll paper storage section.
A first accommodating portion for accommodating roll paper for ejection and a second accommodating portion for accommodating roll paper for storage are provided, and a take-up roller for winding the unwinding portion of the roll paper for storage is provided. A printing apparatus provided on the movable frame such that a center of rotation thereof coincides with an opening / closing center of the movable frame.