JP2868967B2 - Printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing device for printing on a single leaf printing medium such as a card or a sheet.

[0002]

2. Description of the Related Art In a conventional printing apparatus, a single-leaf printing medium is stored in a cassette case detachable from a machine body or using a hopper (for example, see Japanese Unexamined Patent Publication No.
0-174676).

A printing apparatus using the cassette case is:
When the cassette case is inserted to a predetermined position of the machine body, it is necessary to pressurize the print medium stored in the cassette case so as to come in contact with a feed roller provided in the machine body with a predetermined contact pressure. If the cassette case is inserted into the machine body with the feeding roller and the print medium in the cassette case kept in contact with each other, they interfere with each other and cannot be smoothly inserted.

For this reason, in a conventional printing apparatus, the feeding roller is retracted in advance when the cassette is inserted, and when the cassette case is inserted, the feeding roller contacts the print medium in the cassette case with a predetermined pressing force. Or the position of the print medium in the cassette case was previously lowered to a position not in contact with the feed roller, and the bottom plate or the like in the cassette case was temporarily lowered and locked, and the cassette case was inserted to a predetermined position. Sometimes, the lock is released and the print medium comes into contact with the feed roller with a predetermined pressure.

In a printing apparatus using a hopper, printing media are stored in a stacked state in the hopper, and the printing media are fed one by one from the lowest one by a feeding means in which a belt is stretched between rollers, for example. I was

Further, a conventional general printing apparatus is provided with a pair of transport rollers for transporting the fed print medium between the thermal head and the platen while pressing the print medium from both sides under pressure. Such a transport roller pair is configured to always press one roller against the other roller with a constant pressing force.

Further, there is no conventional printing apparatus provided with a mechanism for detecting a remaining amount in a storage section of a printing medium to be fed. Therefore, there is, of course, no printer capable of arbitrarily adjusting the remaining amount of the print medium to be detected. Further, in a printing apparatus using a cassette case or a hopper for storing the print medium as described above, even if the user tries to externally check the remaining amount of the print medium remaining in the cassette case or the hopper, the storage unit for the print medium may be used. Has a frame around
(Wall) could not be seen.

[0008]

In the case of a printing apparatus using a cassette case or a hopper as described above, the cassette case or the hopper must be removed each time a printing medium is set or supplied to the apparatus. There was a problem that it was troublesome.

In a printing apparatus using a cassette case, when inserting the removed cassette case into the apparatus, the feeding roller is previously retracted to a position in the cassette case where the feeding roller does not interfere with the printing medium. When the case was inserted, it was moved so as to come in contact with the print medium in the cassette case with a predetermined pressure, so a dedicated drive mechanism for moving the position of the feed roller was required,
Alternatively, before inserting the cassette case, the bottom plate or the like in the cassette case is temporarily locked at the lowered position so that the print medium stored therein is not in contact with the feeding roller, and the cassette is inserted. Since the lock was released later and the print medium was brought into contact with the feed roller with a predetermined pressing force, a dedicated mechanism for that purpose was required.

Further, in the cassette case inserted into such a printing apparatus, a considerable portion protrudes from the side of the body of the printing apparatus when the cassette case is inserted, so that the protruding portion takes up space. When the body or the like is caught on the portion, there is a fear that the cassette case may be damaged. For this reason, when not in use, the cassette case may be detached from the body and stored separately, but in such a case, the cassette case may be lost.

Further, in the case where one roller is always pressed against the other roller with a constant pressing force as in the conventional conveying roller pair, the printing medium is held between the conveying roller pair. If a jam occurs in this state, it is difficult to remove the jammed print medium as it is.Therefore, a separate manual switching lever for releasing the pressure contact between the rollers of the conveying roller pair is provided, and the paper is conveyed by operating it. The pressure contact between the rollers of the roller pair has been released.

However, it is troublesome to operate the switching lever every time a jam occurs in the portion of the conveying roller pair, and after removing the jammed print medium, the switching lever is moved to the original position (pressurizing). If the user forgets to return to the position, the conveying roller pair is left in a state where the pressure contact is released, which may result in defective conveyance.

Further, the conventional printing apparatus is not provided with a mechanism for detecting the remaining amount of the printing medium to be fed as described above. That is, in the case of a printing device that uses a cassette case or hopper in the storage section for the print medium, it was necessary to remove the cassette case or hopper once when setting or replenishing the print medium. This is because if sensors for detecting the remaining amount were to be attached, they had to be attached to the cassette case or the hopper side, which had a difficult problem.

That is, even if sensors for detecting the remaining amount are provided on the cassette case and the hopper side, it is a precondition that the cassette case and the hopper are detachable, so that the cassette case and the hopper are provided on the cassette case and the hopper. Electrical processing for transmitting a detection signal from the sensor to the printing apparatus is difficult. The detection of the remaining amount has a problem that the mechanism becomes more complicated when the remaining amount of the printing medium is transmitted from the cassette case or the hopper side to the printing apparatus side by a mechanical method.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and can easily perform a printing medium when setting or replenishing the printing medium. Requires a special mechanism for retracting the print media to a position where it does not interfere with the setting and replenishment of the print media, or for temporarily locking the portion where the print media is loaded away from the feeding means. It is an object of the present invention to be able to stably feed a set or replenished print medium without supplying it.

It is another object of the present invention to enable the presence or absence and the remaining amount of a print medium to be directly seen with eyes. further,
It is another object of the present invention to prevent a portion on which a print medium is loaded from protruding from a side surface of the apparatus body so as not to be obstructed.

Still another object of the present invention is to make it possible to easily remove the fed print medium even when the fed print medium is jammed while being held between the pair of transport rollers. It is also possible to detect when the print medium has reached a predetermined remaining amount so that the print medium can be replenished before the print medium is completely exhausted, or the remaining amount of the print medium to be detected can be arbitrarily determined. The purpose is to be able to adjust.

[0018]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a printing apparatus as described above, in which an airframe comprises a stationary body and an opening / closing body which is openably and closably attached to the stationary body. And a feeding means for feeding the printing medium, and a loading table for loading the printing medium, the leading end side of the printing medium loaded thereon being approached to the feeding means. A print medium loading means that rotates about a fulcrum in the direction of separation, and an interlocking mechanism that interlocks an opening / closing operation of the opening / closing body with respect to the fixed body and a rotation operation of the loading table of the print medium loading means. is there.

In the above-mentioned printing apparatus, it is effective if the loading table of the printing medium loading means is constituted by two loading table plates which respectively rotate about the fulcrum axis serving as the fulcrum. . Further, it is preferable that the interlocking mechanism has means for pressing the printing medium loaded on the printing medium loading means against the feeding means when the opening / closing body is closed with respect to the fixed body.

Further, in each of the above printing apparatuses, a pair of conveying rollers for pressing and conveying the printing medium fed from the printing medium stacking means by the feeding means from both sides under pressure is provided, and the opening and closing body is fixed to the fixed body. When closed, one roller of the transport roller pair is pressed and pressed against the other roller, and when the opening / closing body is opened relative to the fixed body, the one roller is pressed in conjunction with the opening operation. It is preferable to provide a transport roller pressurizing / releasing mechanism for releasing the pressure.

The print medium stacking means may include a print medium remaining amount detecting means for detecting when the print medium stacked on the loading table has reached a predetermined remaining amount. And the printing medium remaining amount detecting means is:
It is more effective if a detection remaining amount adjusting mechanism for arbitrarily adjusting the remaining amount of the print medium to be detected is provided.

[0022]

According to the printing apparatus configured as described above, when setting or replenishing a printing medium, when the opening and closing body is opened,
In conjunction with the opening operation, the loading table for loading the printing medium of the printing medium loading means is rotated by the interlocking mechanism, and the feeding tip side of the loading table is centered on the fulcrum in the direction approaching or separating from the feeding means. Therefore, the loading table can be retracted to a position where the printing medium can be easily set or replenished by the rotation. Then, if the switchgear is closed after the setting or replenishment, the loading table on which the printing medium is loaded returns to the original position.

Therefore, a special drive mechanism for retracting the feeding means so as not to interfere with the printing medium when setting or replenishing the printing medium, or a portion of the loading table for loading the printing medium from the feeding roller. There is no need to provide a dedicated mechanism for temporarily locking the remote position.
Since the portion on which the print medium is loaded is trapezoidal and has no frame around it, the presence or absence and the remaining amount of the print medium can be directly seen with the eyes.

Further, if the loading table for loading the printing medium of the printing medium loading means is constituted by two rotating loading tables, one of the loading tables located on the upstream side in the feeding direction of the printing medium can be used. Even when the apparatus is arranged so as to protrude from the side of the machine body, when the apparatus is not used, the loading base plate can be rotated around the fulcrum shaft and folded to eliminate the protrusion from the side of the machine body. Further, the folded loading base plate closes the opening on the side of the machine body, so that dust and the like can be prevented from entering the machine body.

Further, if the interlocking mechanism has means for pressing the printing medium loaded on the printing medium loading means against the feeding means when the opening / closing body is closed with respect to the fixed body, When the machine is closed from the open state, the interlocking mechanism presses the print medium loaded on the loading table of the print medium loading means to the feeding means in conjunction with the operation, so that the print medium is simply closed by closing the opening / closing body. It can be in a feedable state.

In addition, if the conveying roller pressing / releasing mechanism is provided, one roller of the conveying roller pair is pressed by the conveying roller pressing / releasing mechanism when the opening / closing body is closed, and the other roller is pressed. When the switch body is opened, the pressure applied to the one roller is released and the pressure applied to the other roller is released in conjunction with the opening operation.

Therefore, even when the fed print medium is jammed while being held between the pair of transport rollers, the jammed print medium can be easily removed by opening the opening / closing body. Further, if the print medium loading means is provided with the above-described print medium remaining amount detection means,
Since it is possible to detect when a predetermined amount of the print medium loaded on the loading table on which the print medium is loaded reaches a predetermined remaining amount, the print medium can be replenished before the print medium is completely exhausted. If the remaining amount detecting means has a detection remaining amount adjusting mechanism for arbitrarily adjusting the remaining amount of the printing medium to be detected, the remaining amount of the printing medium detected according to the content of the work performed by the operator at that time. Can be adjusted.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a printing apparatus showing one embodiment of the present invention, FIG. 2 is a side view showing a state where a divided opening / closing body of the printing apparatus is divided, and FIG. 3 is a front view thereof.

As shown in FIG. 2 and FIG. 3, the printer P, which is a printing apparatus, has a lower frame 2 as a fixed body and an opening / closing body attached to the lower frame 2 so as to be openable and closable. It is a split open / close body composed of the upper frame 3.

Then, on the upper frame 3 side, as shown in FIG. 2, a supply side ribbon mounting portion 5 for mounting a supply side of an ink ribbon 4 used for printing, and a winding of the ink ribbon 4 used for printing. A take-up side ribbon attachment portion 6 for attaching the take-up side is provided, and a thermal head 9 is attached to a position near a division position with the lower frame 2 via a head attachment stay (not shown).

A pickup roller 18 serving as a feeding means for feeding a single leaf print medium 1 such as a card and a sheet to the lower frame 2, and a front feed table 15 serving as a loading table for loading the print medium 1. And the rear feeding table 16 is centered on a fulcrum shaft 29 serving as a fulcrum in a direction in which the leading end side (left side in FIG. 2) of the printing medium 1 loaded thereon approaches or separates from the pickup roller 18. Interlocking the opening and closing operation of the print medium stacking means with respect to the lower frame 2 of the upper frame 3 and the rotating operation of the front feeding base 15 and the rear feeding base 16 of the printing medium stacking means. A mechanism 30 is provided.

Although the detailed structure and operation of the interlocking mechanism 30 will be described later, as shown in FIG.
Is closed with respect to the lower frame 2, the front feed table 15
The uppermost one of the print media 1 loaded on the rear feeder 16 is pushed up from the lower side of the front feeder 15 so that the front end of the feed is fed to the pickup roller 18. There is provided a means for pressing with a suitable predetermined pressure.

The pickup roller 18 rotates in the direction indicated by the arrow in FIG. 1 while the printing medium 1 is pressed on its peripheral surface.
The printing media 1 loaded on the front feeding base 15 and the rear feeding base 16 are sequentially fed from the upper side. The lower frame 2 on the left side of the pickup roller 18 in FIG. 1 is provided with a feed roller 23 and a reverse roller 24 (the details of the operation will be described later) which are pressed against each other in the vertical direction.

Further, a platen 19 is rotatably mounted on the lower frame 2 side in correspondence with the thermal head 9 on the upper frame 3 side, and the platen 19 is vertically mounted on a transport path between the platen 19 and the feed roller 23. A pair of platen-side transport rollers 7 and a pair of feed-side transport rollers 8, each of which is constituted by a pair of rollers in the direction, are disposed at intervals, and a front feed table 15 and a rear feed table 16 are The print medium 1 fed from above is conveyed toward the space between the thermal head 9 and the platen 19 while pressing and holding the print medium 1 from both sides.

Therefore, in the printer P, the pickup roller 18 is rotated in the direction indicated by the arrow in FIG. 1 from the uppermost position of the print medium 1 loaded on the front feed table 15 and the rear feed table 16. The sheet is separated into one sheet by a feed roller 23 and a reverse roller 24 which are a pair of conveying rollers also having a separating function, and is separated by a pair of conveying rollers 8 and 7 into a thermal head 9 and a platen 19. Conveyed during

The supply-side ribbon mounting portion 5 shown in FIG.
The ink ribbon 4 wound in a roll is set in advance,
Pull out one end of the thermal head 9 and platen 19
When the upper frame 3 is closed as shown in FIG. 1 when the upper frame 3 is closed as shown in FIG.
The ink ribbon 4 includes a thermal head 9 and a platen 19.
When the platen 19 is rotated in the direction indicated by the arrow, the platen 19 is conveyed to the left along with the print medium 1 in the figure, and predetermined printing is performed on the print medium 1.

The upper frame 3 is attached to the lower frame 2 by a hinge 17 shown in FIG. 3. The upper frame 3 can be opened and closed in the direction of arrow A with the hinge 17 as a fulcrum. I have.

As shown in FIG. 4, the hinge portion 17 has two pairs of hinge plates 101 and 102 formed at intervals on the upper frame 3 side, and the hinge plates 101 and 102 formed on the lower frame 2 side. The two pairs of hinge plates 103 and 104 formed at intervals so as to correspond to
The shafts 105 and 106 are rotatably connected at 05 and 106, respectively.
7 and 107, the hooks at one end are attached to a shaft 108 fixed between the hinge plates 101 and 102 on the upper frame 3 side, and the hooks at the other end are attached to the hinges on the lower frame 2 side. Each is locked to a shaft 109 fixed between the plates 103 and 104.

As described above, since the torsion coil spring 107 is mounted on the hinge portion 17, when the upper frame 3 is opened with respect to the lower frame 2, the upper frame 3 is rapidly rotated by the weight, and It also serves as a buffer function to prevent hands from being pinched. Since the torsion coil springs 107 are mounted on the shafts 105 and 106 serving as fulcrums when the upper frame 3 is opened and closed, the torsion coil springs 107 and 107 occupy no space, so that the hinge portion 17 is made compact (minimum mechanical mechanism). it can.

The printer P shown in FIG. 1 is provided with a lock mechanism (not shown) for preventing the upper frame 3 from being opened when the upper frame 3 is used in a closed state. Therefore, when the upper frame 3 is opened, a lock (not shown) provided separately is lifted to release the lock, and then the upper frame 3 is opened.

The upper frame 3 is opened when the transported print medium 1 is jammed or when the print medium 1 is set or replenished on the front and rear feed tables 15 and 16. Or when the printing medium 1 is exchanged for a different size or type, or when the ink ribbon 4 is exchanged or maintenance is performed.

As shown in FIG. 3, the upper frame 3 is an upper frame left side plate 21 which is erected in parallel with a space therebetween.
And an upper frame right side plate 22 connected by a plurality of stays (not shown), and the outside thereof is covered with an upper frame cover 31. The thermal head 9 is mounted between the upper frame left side plate 21 and the upper frame right side plate 22 as shown.

In the lower frame 2, the lower frame left side plate 25 and the lower frame right side plate 26 are erected in parallel at an interval, and the latch side plate 27 is arranged outside the lower frame right side plate 26 at an interval. Are erected in parallel, their side plates are connected by a plurality of stays (not shown), and the outside thereof is covered by a lower frame cover 32.

A side plate cover 28 is attached between the upper part of the lower frame right side plate 26 and the latch side plate 27, and is stored in a space formed between the lower frame right side plate 26 and the latch side plate 27. The driving system (not shown) is covered.

A platen 19 is rotatably mounted between the lower frame left side plate 25 and the lower frame right side plate 26 via bearings 36, 36, and between the side plates as shown in FIG. Both ends of the fulcrum shaft 29 are fixed, and the front and rear feed tables 15 and 16 are rotatably supported on the fulcrum shaft 29 via bearings 40 and 40, respectively.

Therefore, the front feed table 15 and the rear feed table 16 can be individually rotated about the fulcrum shaft 29 as a fulcrum. The rear feeding table 16 is formed of, for example, a ferromagnetic material such as an iron plate, and can be rotated to a substantially vertical position when the rear feeding table 16 is closed by lifting the rear section 16a side as shown in FIG. The upper frame cover 31 is formed with a stepped portion 31a corresponding to the rear feeding base 16 so as to be able to store the rear part 16a of the rear feeding base 16.

Then, a magnet catch 33 is attached to the outside of the stepped portion 31a, and when the printer P is not used, the rear feeding base 16 is turned to the position shown in FIG. It can be fixed and held by suction by magnetic attraction.

As described above, when the rear feeding table 16 is closed,
Since the rear feed base 16 does not protrude from the side surface of the upper frame cover 31, or by moving the printer P, pre
When the center P is not used, there is no obstructive projecting portion, which is convenient, and the space of the portion can be effectively used. The rear feeding table 16 may be made of a ferromagnetic material only in the vicinity of the rear part 16a, and the other parts may be made of resin or the like.

The rear feed base 16 is formed with a protruding portion 16b projecting downward in FIG. 6 from the fulcrum shaft 29. When the rear feed base 16 is used, it is shown in FIG. When the front feeder 15 and the print medium loading surface (upper surface) are rotated to a position where they are substantially flush with each other, the projecting portion 16b abuts on the back side of the print medium load surface of the front feeder 15, Further rotation in the clockwise direction is restricted and the position is determined.

On the other hand, as shown in FIG. 5, the front feeding table 15 has stays 1 on its outer surfaces on both front sides (left side in the figure).
One end of each of the arms 4 and 14 is rotatably attached to each of the stop pins 34 and 34, and the other end of each of the arms 13 and 13 (see also FIG. 5) is rotated by a stop pin as shown in FIG. Mounted as possible.

The arms 13, 13 are provided on the fulcrum shaft 2 for pressing.
The supporting shaft 20 for pressurizing is fixed between the lower frame left side plate 25 and the lower frame right side plate 26 via bearings 35, 35 as shown in FIG. It is rotatably supported in the state.

One end of a plate-like arm 12 is fixed to the right end of the pressing fulcrum shaft 20 in FIG. 3 as shown in FIG. 1, and the other end of the arm 12 is fixed to the other end of the arm 12 as shown in FIG. Pin 3 having a sleeve 11 penetrated near its lower end.
The arm 7 is connected by being movably fitted into an elongated hole 12a formed in the arm 12, so that the arm 12 rotates in the direction of arrow B when the sleeve 11 moves up and down.

The sleeve 11 is supported by a supporting member (not shown) so as to be movable only in the vertical direction. A pressing shaft 38 is inserted into the sleeve 11 so as to be movable vertically, and is integrally formed with the lower end of the pressing shaft 38. The sliding member 39 is fixed, and the sliding member 39 moves up and down while sliding on the inner peripheral surface of the sleeve 11.

A pressing spring 41 is interposed between the lower end of the pressing shaft 38 and the bottom of the sleeve 11, whereby the pressing shaft 38 is constantly urged upward. An annular stopper 42 is integrally fixed to the inner peripheral surface on the upper end side of the sleeve 11, and the inner peripheral surface also serves as a bearing for suppressing lateral vibration of the pressing shaft 38.
1 prevents the sleeve 11 from falling out of the sleeve 11.

A washer 43 is provided near the upper end of the pressing shaft 38, and the washer 43 is positioned so as to be sandwiched between two E-rings respectively fitted in two grooves formed in the pressing shaft 38 in the circumferential direction. ing. Then, a return spring 45 is interposed between the washer 43 and the side plate cover 28 (see also FIG. 3) so as to constantly urge the pressing shaft 38 upward.

On the other hand, the pressing shaft 38 is
As shown in FIG. 3, the bracket 46 is fixed to the right side plate 22 of the upper frame by screwing, and when the upper frame 3 is closed, the lower surface 46 a of the bracket 46 comes into contact with the upper end of the pressing shaft 38. Is pushed down. When the printer P is first set or supplied with the print medium 1 on the front feeding base 15 and the rear feeding base 16, the upper frame 3 is illustrated with the hinge 17 as a fulcrum as shown in FIG. Open like.

Then, as shown in FIG. 2, the return spring 45 is extended, and the pressing shaft 38 is raised, whereby the pressurizing spring 41 is extended, and the pressing spring 41 is extended from the sleeve 11 through the arms 12 and 13 and the stay 14 to the front part. Feeding table 1
Since the pressing force acting on the distal end side of the feed roller 5 is weakened, the front feed base 15 rotates counterclockwise about the fulcrum shaft 29 together with the rear feed base 16.

Accordingly, the pressurizing of the print medium 1 positioned at the uppermost position on the front feed table 15 and the rear feed table 16 by the pickup roller 18 is released, so that the print medium 1 is supplied to the upper portion thereof. Becomes easier. And print medium 1
When the upper frame 3 is closed as shown in FIG. 1 after replenishment, the lower surface 46a of the bracket 46 abuts on the upper end of the pressing shaft 38 and pushes it down, so that the return spring 45 is compressed and the pressing spring is pressed. 41 is also compressed.

Accordingly, since the compressed reaction force of the pressure spring 41 acts on the bottom of the sleeve 11 and pushes it down, the arm 12 rotates counterclockwise in FIG. Is rotated in the same direction, and the arm 13 integral therewith also rotates counterclockwise about the pressure fulcrum shaft 20 as a fulcrum. (Left side in Fig. 1)
Is pushed up.

As a result, the uppermost one of the print media 1 replenished on the front feeding base 15 and the rear feeding base 16 is applied to the pickup roller 18 by a predetermined pressing force (contact) suitable for feeding. Pressure).

As described above, when the upper frame 3 is closed, both the return spring 45 and the pressurizing spring 41 are in a compressed state, but the print medium 1 on the front feed base 15 and the rear feed base 16 is Only the urging force of the pressure spring 41 acts on the pressure applied by the pickup roller 18 (the front feed table 15 is pushed up and consequently pressurized).

That is, the return spring 45 extends the pressurizing spring 41 by raising the pressing shaft 38 when the upper frame 3 is opened, weakens the spring force, and raises the sleeve 11, whereby the front spring 3 is moved forward. It merely serves to lower the tip side of the unit feed table 15 and does not affect the above-mentioned pressing force. In setting the pressurizing spring 41, when the printing medium 1 is fully loaded on the front feeding base 15 and the rear feeding base 16 and when the printing medium 1 becomes the last sheet, the printing medium 1 is set. It is preferable to use a biasing force (spring pressure) so that the above-mentioned pressing force acting on the medium surface becomes substantially the same.

The printer P has an upper frame 3
Is closed when the return spring 4 of the interlocking mechanism 30 is closed.
Since both the pressure spring 5 and the pressure spring 41 are compressed and function as a shock absorber, the shock when the upper frame 3 is closed can be softened even if the hinges 17 are compacted as described with reference to FIG. Therefore, the entire apparatus can be configured with a minimum of mechanical mechanisms.

Therefore, the body structure of a conventional printing apparatus such as a printer is divided into a fixed body having a platen and an opening / closing body having a thermal head, and the opening / closing body is closed from an open state. In order to prevent a major component such as a thermal head from being inconvenienced by a strong impact sometimes, a damper for damping comprising a support shaft and a spring is mounted between a fixed body and an opening / closing body (Japanese Patent Laid-Open No. Sho 62-62). No. 73979), or a device in which a hydraulic damper is mounted between the fixed body and the opening / closing body (see Japanese Patent Application Laid-Open No. 61-266271), the size of the entire apparatus is generally increased. Although there was a problem, according to the printer P, the entire apparatus can be downsized while having the buffer function.

As described above, in the printer P, the interlocking mechanism 30 has a pressurizing mechanism for pressing the print medium 1 loaded on the front and rear feeding tables 15 and 16 against the pickup roller 18, and an upper frame. Since it also serves as both a buffering mechanism when closing 3, it does not become a large dividing mechanism as in the case where they are separately provided.

By the way, when the printing medium 1 loaded thereon is gradually reduced by feeding, the front feeding base 15 and the rear feeding base 16 shown in FIG. The tip side rises accordingly. Then, when the two feeders pass the horizontal state and go down to the right (the rear feeder 16 is at a position lower than the front feeder 15), the print medium 1 thereabove is moved by its own weight to the rear ( It is easy to shift to the right (in FIG. 1).

Therefore, in this embodiment, as shown in FIG. 8, a guide 52 for preventing the displacement is provided on the upper surface of the rear feeding table 16. If the position of the guide 52 in the left-right direction in FIG. 8 can be adjusted according to the length of the printing medium 1 in the feeding direction, the guide 52 can be adjusted to the optimum position even for printing media of different sizes. Can guide you.

[0068] Further, the printer P, as shown in (a) of FIG. 9, when a print medium stacked on the front feed table 15 (as abbreviated shown) reaches a predetermined remaining amount There is provided a print medium remaining amount detecting means for detecting this.

The print medium remaining amount detecting means forms a protruding piece 15a by bending one side of the front end side of the front feeding table 15 outward at right angles to form a protruding piece 15a. Is fixed to the lower frame left side plate 25 via the sensor bracket 48 by a fixing screw 49, and the fixing screw 49 is formed in the long hole 25 formed in the lower frame left side plate 25.
By being movably fitted into the lower frame 25 and fixed to the lower frame left side plate 25, the transmissive photo sensor 47 can be moved and adjusted along with the sensor bracket 48 along the long hole 25d.

Therefore, the transmission type photo sensor 47 is
Its position can be adjusted arbitrarily along the elongated hole 25d,
In this embodiment, the long hole 2 formed in the lower frame left side plate 25 is used.
5d and the fixing screw 49 fitted therein function as a detection remaining amount adjusting mechanism for arbitrarily adjusting the remaining amount of the print medium to be detected.

The front feeder 15 and the rear feeder 1
9A, the number of print media stacked on the printer 6 gradually decreases by feeding, and the front feeding table 15 rises to the left as shown in FIG. 9A, and the projection 15a is detected by the transmission type photo sensor 47. When the portion is shielded from light, it is detected that the number of print media on the front feeding base 15 and the rear feeding base 16 has reached a predetermined remaining amount by a sensor signal that changes accordingly.

Note that the transmission type photo sensor 47 is
A plurality of print media are provided at predetermined intervals on the movement path of the printer 5a, and a display of the remaining amount of the print medium is provided so as to be visible from outside the printer. It is preferable that the display of the remaining amount of the print medium is changed each time is detected.

For example, as shown in FIG. 9B, four horizontal lines 51a to 51d which can be turned on and off in the vertical direction.
In addition, the transmission type photosensors 47 as shown in FIG. 9A are respectively provided on the moving path of the projecting piece 15a of the front feed base 15 so as to correspond to the remaining amount of the print medium. And the front feeder 15
Each time the transmission photosensor 47 detects the inclination of the rear feeding table 16 and changes the inclination, the horizontal line 51 indicating the remaining amount of the printing medium which turned on all four at the time of the first full load.
a to 51d are turned off one by one in order from the top.

The front feed base 15 and the rear feed base 16 described with reference to FIG. 1 and the like, the position of the fulcrum shaft 29 that supports them so that they can swing are adjusted by the front feed base 15 and the rear feed base. if so is positioned substantially at the center of the length print medium conveying direction of Okudai 16, somewhat in Kakawawa regardless its weight of the printing medium 1 stacked across the two feed table on the loading capacity (The position of the center of gravity) acts on the fulcrum shaft 29 in a balanced state, so that the front feed base 15 is pushed up by the urging force (spring pressure) of the pressurizing spring 41, thereby the front feed base 15 is pressed by the pickup roller 18, the pressing force is not affected by the weight of the print medium on the front feeder 15 and the rear feeder 16, Razz constant Kakawawa the pressure applied to the print medium to the loading amount of the printing medium It becomes effective when.

In the printer P, the thermal head 9 is mounted on the upper frame 3 and the platen 19 is mounted on the lower frame 2 as described with reference to FIG.
Therefore, when the upper frame 3 is opened as shown in the figure, the thermal head 9 separates from the platen 19.

Therefore, for example, when the print medium 1 is jammed between the thermal head 9 and the platen 19, the thermal head 9 is separated from the platen 19 by opening the upper frame 3, so that the jammed print medium is removed. It can be easily removed. Also, when the upper frame 3 is opened during maintenance, the thermal head 9
9, the work such as cleaning of the thermal head 9 and the platen 19 can be facilitated.

The platen side transport roller pair 7 described with reference to FIG.
And the pair of transport rollers 8 on the feeding side,
10a and 10b are disposed between the lower frame left side plate 25 and the lower frame right side plate 26 (both shown in FIG. 3 or FIG. 5) by bearings 53 shown in FIGS. The transport rollers 7a and 8a are supported by a drive system (not shown) provided between the lower frame right side plate 26 and the latch side plate 27 shown in FIG. Each is driven to rotate in the direction indicated by the arrow in FIG.

The lower transport rollers 7a and 8a are connected to the upper transport rollers 7b and 8b, respectively, as shown in FIG.
Are closed so that they come into contact with each other at a predetermined pressure suitable for conveyance. As shown in FIG. 11, the conveyance rollers 7b and 8b are provided with bearings 54,
The bearings 54, 54 are fitted to the lower frame left side plate 25 and the lower frame right side plate 26, as shown in FIGS. 10 (a) and 10 (b). U grooves 25 formed in the direction (up and down direction in the figure) in which the upper conveying rollers 7b and 8b approach and separate from the upper roller 8a.
a, 26a and 25b, 26b so as to be movable.

The U-shaped groove 25a of the lower frame left side plate 25
A long hole 25c for the spring mounting shaft is formed in the vertical direction between the spring mounting shaft 25b and the lower frame right side plate 26, and a long hole for the spring mounting shaft having a similar shape corresponding to the long hole 25c for the spring mounting shaft. 26c, and the spring mounting shaft elongated hole 25c,
The two ends of the spring mounting shaft 55 are movably fitted into 26c, and as shown in FIG. 11, the spring mounting shaft 55 is circumferentially inserted into portions located inside the lower frame left side plate 25 and the lower frame right side plate 26, respectively. E-ring 5 in the groove formed along
The spring mounting shaft 55 is mounted between the left and right side plates so as to be vertically movable.

Then, the winding portions of the torsion coil spring 57 are inserted into the portions of the spring mounting shaft 55 projecting outward from the lower frame left side plate 25 and the lower frame right side plate 26, respectively, so that the springs do not fall off. A retainer is attached to the mounting shaft 55, and the hook portions 57a, 57b on both sides of the torsion coil spring 57 are connected to the bearings 54 of the transport rollers 7b, 8b.
As shown in FIGS. 10 (a) and (b) in FIG.

Since the platen side transport roller pair 7 and the feed side transport roller pair 8 are configured as described above, when the upper frame 3 is opened as shown in FIG. 3, as shown in FIG. 10 (a). Then, the spring mounting shaft 55 is moved upward in the elongated holes 25c and 26c by the urging force of the torsion coil spring 57 as shown in FIG.

Therefore, the upper conveying rollers 7b, 8b
Is hardly pressed by the torsion coil spring 57 toward the lower transport rollers 7a, 8a, so that the print medium is jammed between the transport rollers 7a and 7b or between the transport rollers 8a and 8b (or over both). Even
The jammed print medium can be easily removed.

When the upper frame 3 is closed from the open state, as shown in FIG. 10B, the upper frame 3 is formed at the lower ends of the upper frame left side plate 21 and the upper frame right side plate 22, respectively. Since the contact portions 21a and 22a contact the spring mounting shaft 55 and press it down, the spring mounting shaft 55
Moves downward in the slots 25c and 26c.

Therefore, the urging force of the torsion coil spring 57 acts on the bearings 54, 54 of the upper conveying rollers 7b, 8b to push them down, so that the upper conveying rollers 7b, 8b are pressed down.
b and 8b contact the lower conveying rollers 7a and 8a with a predetermined pressure suitable for conveying the print medium.

Feed roller 23 and reverse roller 24
As shown in FIG. 5, a feed roller shaft 58 of the feed roller 23 and a reverse roller shaft of the reverse roller 24 are provided between the lower frame left side plate 25 and the lower frame right side plate 26, as shown in FIG. 5
9 (see FIG. 1 because it is not visible in FIG. 5), and a pickup roller shaft 61 of the pickup roller 18 are rotatably mounted on the lower frame right side plate 26 and the latch side plate 27 via bearings, respectively.

The respective roller shafts of the feed roller 23, the reverse roller 24, and the pickup roller 18 are driven to rotate by a driving device (not shown) provided between the lower frame right side plate 26 and the latch side plate 27. I have. Feed roller 23 and reverse roller 24
As described with reference to FIG. 1, the feed rollers 23 are arranged so as to oppose each other in a vertically pressed state, and the feed roller 23 rotates in the direction indicated by the arrow in FIG. 1.

The reverse roller 24 is connected to a reverse roller shaft 59 via a torque limiter 62, and the reverse roller shaft 59 has a clockwise rotational force in FIG. 1 (counterclockwise in FIG. 1). Direction of rotation)
Is transmitted.

When one print medium or no print medium exists between the feed roller 23 and the reverse roller 24, the rotational force of the feed roller 23 in the direction indicated by the arrow is passed through the print medium or directly. The transmitted torque is transmitted to the reverse roller 24, and the transmitted torque overcomes the torque transmission force of the torque limiter 62 mounted on the reverse roller 24, causing it to idle, and the reverse roller 24 rotates around the feed roller 23 (see FIG. 1 rotates counterclockwise).

When two or more print media are fed (double feed) between the feed roller 23 and the reverse roller 24, the rotational force from the feed roller 23 causes a small friction between the print media and the print media. Since the torque is transmitted to the reverse roller 24 via the coefficient, the rotational force from the reverse roller shaft 59 is transmitted to the reverse roller 24 via the torque limiter 62, and rotates in the clockwise direction in FIG. The printing medium located on the lower side is sequentially returned to the front feeding table 15 side, and is separated into one sheet.

By the way, as shown in FIGS. 12A and 12B, the support portion of the feed roller 23 by the lower frame right side plate 26 is attached to the lower frame right side plate 26 by the reverse roller 24.
A bearing 63 for supporting the feed roller 23 is movably fitted in a long hole 26e formed in a direction approaching and separating from the reverse roller 24 so as to be able to approach and separate from the reverse roller 24.

A leaf spring 64 is fixed to the upper frame right side plate 22 of the upper frame 3 at one end by screws 65. When the upper frame 3 is closed as shown in FIG. A free end of the leaf spring 64 on the right side in FIG.
It comes into contact with the peripheral surface and pushes it down.

Therefore, when the upper frame 3 is closed and the feed roller shaft 58 is pressed down by the leaf spring 64, the feed roller 23 is pressed against the reverse roller 24 with a predetermined pressing force, and as described above, during that time. When the upper frame 3 is opened (the state shown in FIG. 3), the leaf spring 64 separates from the bearing 63 supporting the feed roller shaft 58, and the pressure is released. Therefore, the feed roller shaft 58 moves in a direction away from the reverse roller 24 in the elongated hole 26e together with the bearing 63, and the pressurization of the feed roller 23 against the reverse roller 24 is released (pressure contact release).

Therefore, the printing medium is fed roller 23
When the upper frame 3 (FIG. 3) is opened and the right side plate 22 of the upper frame is opened, the pressure of the feed roller 23 against the reverse roller 24 is increased even if a jam occurs while being sandwiched between the reverse roller 24 and the feed roller 23. Since the print medium is released, the jammed print medium can be easily extracted and removed.

When the print medium is replaced with another size or a different type, the print medium set so far is separated and the feed roller 23 is removed.
Even in such a case, if the upper frame 3 is opened, the pressure of the feed roller 23 against the reverse roller 24 is released. Therefore, the printing medium can be easily taken out, so that the printing medium can be exchanged smoothly.

FIG. 13 is a front view showing a second embodiment of the printing apparatus according to the present invention, FIG. 14 is a side view showing a schematic configuration of the printing apparatus, and FIG. 15 is an upper frame of the printing apparatus.
FIG. 13 is a side view showing a state where is opened, and portions corresponding to the first embodiment in FIGS. 1 to 12 are denoted by the same reference numerals.
In the second embodiment, the roller for releasing the pressure contact is set to the reverse roller 24 side.

As shown in FIG. 13, the lower frame right side plate 2
6 is fixed at a substantially right angle (horizontal state) to the surface on the side of the latch side plate 27 by caulking.
As shown in FIG. 14, a substantially central portion of the shaft 66 is swingably mounted, and an E-ring is mounted on the distal end of the shaft 66 so that the pressing lever 67 does not fall off.

A tension spring 7 is provided between a hole formed at one end of the pressing lever 67 on the left side in FIG. 14 and a spring engaging shaft 69 fixed horizontally to the lower frame right plate 26.
1 and the pressing lever 67 has its tension spring 71
Swings counterclockwise in FIG. 14 by the urging force of
The other end 67a of the pressing lever 67 pushes up the reverse roller 24 via the bearing 72 so that the reverse roller 24 comes into pressure contact with the feed roller 23 with a pressing force suitable for separating and transporting the print medium.

In this embodiment, the feed roller 23 is rotatable at a fixed position (does not move up and down) on both the lower frame right side plate 26 and the latch side plate 27 as shown in FIG. 24 is the upper frame 3
It moves up and down with the opening and closing of. That is, the reverse roller 24 moves the two bearings 72, 72 that support the reverse roller shaft 59 at spaced positions, toward and away from the feed roller 23 on both the lower frame right side plate 26 and the latch side plate 27. Are movably fitted into the elongated holes 26f, 27a formed in the respective directions.

When the upper frame 3 is opened as shown in FIG. 13, the pressing shaft 38 is raised by the urging force of the return spring 45 as shown in FIG.
8 is provided with a pin 75 protruding in correspondence with the pressing lever 67. The pin 75 is movable in a slit groove formed in the sleeve 11 along the axial direction (vertical direction in the figure). When the shaft 38 is lifted, the pin 75 pushes the pressing lever 6
7, the portion on the left side of the shaft 66 is pushed up.

Therefore, the pressing lever 67 swings clockwise in FIG.
Is lowered by its own weight (a weak tension spring may be provided) along the long holes 26f and 27a, so that the pressure contact between the reverse roller 24 and the feed roller 23 is released.

FIGS. 16 to 19 show a third embodiment of the printing apparatus according to the present invention, and portions corresponding to those of the first embodiment in FIGS. 1 to 12 are denoted by the same reference numerals. In the third embodiment, when the upper frame 3 is closed,
A torsion coil spring is used as a biasing member for applying pressure.

As shown in FIG. 16, the arm 12 is directly attached to the pressing shaft 38 with the stopper pin 37, and the pressing shaft 38 is supported by a guide (not shown) so as to be movable in the vertical direction. The arm 12 is fixed to a shaft 76 with a set screw, and the shaft 76 is coaxially connected to the shaft 77 by fitting as shown in FIG.

The shaft 76 and the shaft 77 are connected by a central hole 77 formed in the shaft 77 along the axial direction as shown in FIG.
a, an engaging shaft portion 7 correspondingly formed on the shaft 76 side;
6a is rotatably fitted. As shown in FIG. 17, the shaft 76 and the shaft 77 in this connected state are rotatably supported by the latch side plate 27 via bearings, and the shaft 77 is rotatably supported by the lower frame left side plate 25 and the latch side plate 27. The lower frame right side plate 26 is rotatably supported via bearings.

As shown in FIG. 18, a torsion coil spring 78 is mounted in the vicinity of the joint between the shaft 76 and the shaft 77, and one hook of the torsion coil spring 78 is screwed to the stopper 79 on the shaft 77, as shown in FIG. Arm 1 which is locked and the other hook is integrally fixed to the shaft 76 as shown in FIG.
2 is locked to the side edge. Also, as shown in FIGS. 16 and 17, the arms 81, 81 are fixedly mounted on the shaft 77 in a well-balanced manner at intervals.

Since the printer P is configured as described above, when the upper frame 3 shown in FIG. 17 is closed, the pressing shaft 38 is pushed down by the lower surface 46a of the bracket 46, whereby the arm 12 shown in FIG. It rotates counterclockwise in the figure. The rotation of the arm 12 in the direction of arrow C in FIG. 19 causes the torsion coil spring 78 to be twisted in the direction in which the spring force increases, so that the stopper 79 is rotated in the direction of arrow C.

Therefore, the shaft 77 shown in FIG. 17 rotates counterclockwise in FIG.
1 also rotates counterclockwise to move the front
Is pushed up against the urging force of the tension spring 82 which urges it in the direction of pulling it down, and the print medium (not shown in FIG. Pressure contact with pressure.

When the upper frame 3 is opened from this state, the front feeding table 15 is pulled down by the urging force of the tension spring 82 shown in FIG. And rotate counterclockwise.

When the upper frame 3 is opened,
In order to prevent the urging force of the torsion coil spring 78 from continuing to be applied and continuously pressing the front feeding table 15 upward, the stopper 79 abuts on the arm 12 to restrict the rotation thereof. The urging force acting on the arm 81 of the torsion coil spring 78 is suppressed, and the position of the front feed table 15 is lowered only by the urging force of the tension spring 82.

[0109] The torsion coil spring 78 is used to determine whether the printing medium is fully loaded on the front feeding base 15 and the rear feeding base 16 and when the printing medium is the last sheet. It is preferable to select an urging force (spring force) such that the pressure contact force (pressing force) of the pickup roller 18 acting on the pickup roller 18 becomes substantially the same. Further, the tension spring 82 is selected to have a weak spring force that does not affect the pressing force of the torsion coil spring 78.

FIG. 20 shows a fourth embodiment of the printing apparatus according to the present invention, and portions corresponding to those of the first embodiment in FIG. 3 are denoted by the same reference numerals. In this embodiment, the opening / closing operation of the upper frame 3 with respect to the lower frame 2 and the pivoting operation of the front feeding table 15 and the rear feeding table 16 (see FIG. 1 because they are not shown in FIG. 20). The interlocking mechanism that interlocks with
A pinion 91 and a rack 92 are used.

That is, the pinion 91 is provided at the hinge portion 97 between the upper frame 3 and the lower frame 2, and the pinion 9
1 is integrally fixed to the upper frame 3 so that when the upper frame 3 is opened, the pinion 91 rotates counterclockwise in FIG. The pinion 91 has a pressing shaft 3
A rack 9 fixed integrally to the side of 8 'along the axial direction
Engage 2 and close upper frame 3 to pinion 91
Is rotated clockwise, the pressing shaft 38 'is pushed down, and when the upper frame 3 is opened, the pressing shaft 38' is raised. Even in this case, the same effects as those of the above-described embodiments can be obtained.

[0112]

As described above, according to the present invention, the following effects can be obtained. According to the printing device of the first aspect, the loading table for loading the printing medium of the printing medium loading means is moved closer to or away from the feeding means by the interlocking mechanism in conjunction with the opening / closing operation of the opening / closing body. It is designed to rotate around the fulcrum in the direction, so when setting or replenishing print media, open the opening / closing mechanism to easily set the print media on the loading table of the printing media loading means. , Can be replenished.

Therefore, a special drive mechanism for retracting the feeding means to a position where the feeding means does not interfere with the printing medium when setting or replenishing the printing medium, or a portion of the loading table for loading the printing medium from the feeding means. There is no need to provide a dedicated mechanism for temporarily locking the remote position. Also, since the portion on which the print medium is loaded is trapezoidal, there is no frame around it, so that the presence or absence and the remaining amount of the print medium can be directly seen with the eyes.

According to the printing apparatus of the present invention, one of the two loading base plates of the printing medium loading means on the upstream side in the feeding direction of the printing medium is disposed so as to protrude from the side of the body. However, when the apparatus is not used, the loading base plate can be rotated around the fulcrum shaft and folded to eliminate the protrusion from the side of the machine body. Further, the folded loading base plate closes the opening on the side of the machine body, so that dust and the like can be prevented from entering the machine body.

According to the third aspect of the present invention, when the opening / closing body is closed from the open state, the interlocking mechanism interlocks with the operation of the opening / closing body to feed the printing medium loaded on the loading table of the printing medium loading means. , The print medium can be fed by simply closing the switchgear. Therefore, it is not necessary to provide a dedicated pressurizing unit.

According to the printing apparatus of the fourth aspect, when the opening / closing body is closed, one of the conveying roller pairs can press the other roller to press the other roller to convey the printing medium. Since the pressure applied to the rollers is released in conjunction with the opening operation, even if the fed print medium is jammed while being held between the pair of transport rollers, the jam will occur if the opening and closing mechanism is opened. Printed media can be easily removed.

According to the printing device of the present invention, when the remaining amount of the printing medium loaded on the loading table on which the printing medium is loaded reaches a predetermined remaining amount, it can be detected. By displaying an indicator light, it is possible to notify that the print medium has reached the predetermined remaining amount, so that it is possible to replenish the print medium before it runs out.

According to the printing apparatus of the sixth aspect, the remaining amount of the print medium to be detected can be arbitrarily adjusted, so that the remaining amount of the print medium to be detected according to the job contents performed by the operator at that time can be adjusted. Can be adjusted.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a printing apparatus showing one embodiment of the present invention.

FIG. 2 is a side view showing a state where a divided opening / closing body of the printing apparatus is divided.

FIG. 3 is a front view of the printing device.

FIG. 4 is a perspective view showing a hinge portion of the divided opening / closing body of the printing apparatus.

FIG. 5 is a plan view showing a lower frame which is a fixed body of the printing apparatus in FIG. 1;

FIG. 6 is a side view showing a state in which one of the two loading base plates provided in the printing apparatus of FIG.

FIG. 7 is a configuration diagram showing an internal structure by partially breaking an interlocking mechanism provided in the printing apparatus of FIG. 1;

FIG. 8 is a diagram showing a state in which the printing apparatus of FIG. 1 has no print medium and the upper frame is closed.

FIG. 9 is a diagram showing a print medium remaining amount detecting unit and a specific remaining amount display example of the print medium remaining amount detected by the unit;

FIG. 10 is a diagram for explaining a transport roller pressing / releasing mechanism.

FIG. 11 is a plan view showing a portion of a transport roller pair that is pressed and released by the transport roller pressing and releasing mechanism.

FIG. 12 is a schematic diagram showing a feed roller and a reverse roller each provided with a transport roller pressing / releasing mechanism.

FIG. 13 is a front view showing a second embodiment of the printing apparatus according to the present invention.

FIG. 14 is a side view showing a schematic configuration of the printing apparatus.

FIG. 15 is a side view showing a state where the upper frame of the printing apparatus is opened.

FIG. 16 is a side view showing a third embodiment of the printing apparatus according to the present invention.

FIG. 17 is a front view showing a state where the upper frame of the printing apparatus is opened.

FIG. 18 is a perspective view showing a main part of a unit provided in the printing apparatus for pressing a print medium against a pickup roller.

FIG. 19 is a view showing a state in which a stopper 79 of the means is in contact with the arm 12.

FIG. 20 is a front view showing a fourth embodiment of the printing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Print medium 2 Lower frame (fixed body) 3 Upper frame (opening / closing body) 7 Platen side conveyance roller pair 8 Feed side conveyance roller pair 15 Front feed stand (loading stand) 15a Protrusion 16 Rear feed stand (loading) 17, 97 Hinge part 18 Pickup roller (feeding means) 20 Pressing fulcrum shaft 23 Feed roller 24 Reverse roller 25d Long hole 29 Supporting shaft 30 Interlocking mechanism 38, 38 'Pressing shaft 41 Pressing spring 45 Return spring 47 Transmission Type photo sensor 49 Fixing screw 57 Torsion coil spring 64 Leaf spring

Continuation of the front page (56) References Japanese Utility Model Showa 61-80734 (JP, U) Japanese Utility Model Showa 56-47535 (JP, U) Japanese Utility Model Showa 64-57062 (JP, U) Japanese Utility Model Utility Model 1-59645 (JP) , U) Japanese Utility Model Hei 1-169255 (JP, U) Japanese Utility Model Utility Model Hei 1-164446 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41J 29/00 B41J 13/00 B41J 29/48

Claims (6)

(57) [Claims] 1. A printing apparatus for printing on a single-leaf print medium, wherein the body is a divided opening / closing body composed of a fixed body and an opening / closing body attached to the fixed body so as to be openable and closable,
A feeding means for feeding the print medium to the machine, and a loading table for loading the print medium in a direction in which the leading end side of the print medium loaded thereon approaches or separates from the feed means. A print medium loading unit that rotates around a fulcrum; and an interlocking mechanism that interlocks an opening / closing operation of the opening / closing body with respect to the fixed body and a rotation operation of the loading table of the print medium loading unit. Printing device. 2. The printing apparatus according to claim 1, wherein the loading table of the printing medium loading means is constituted by two loading table plates each rotating around a fulcrum axis serving as the fulcrum. Characteristic printing device. 3. The printing apparatus according to claim 1, wherein the interlocking mechanism feeds the print medium loaded on the print medium loading means when the opening / closing body is closed with respect to the fixed body. A printing device comprising means for applying pressure to the means. 4. The printing apparatus according to claim 1, wherein the printing medium fed from the printing medium stacking means by the feeding means is pressed and conveyed from both sides. When a roller pair is provided, one of the rollers of the transport roller pair is pressed to be in pressure contact with the other roller when the switching body is closed with respect to the fixed body, and the switching body is opened with respect to the fixed body. And a transport roller pressing / releasing mechanism for releasing the pressure applied to the one roller in conjunction with the opening operation. 5. The printing apparatus according to claim 1, wherein the printing medium stacking unit is configured to detect when a predetermined amount of the printing medium stacked on the stacking table reaches a predetermined remaining amount. A print medium remaining amount detecting means for detecting the remaining amount of the print medium. 6. A printing apparatus according to claim 5, wherein said print medium remaining amount detecting means has a detection remaining amount adjusting mechanism for arbitrarily adjusting the remaining amount of the print medium to be detected. .