JP2502085Y2 - Printer with paper guide return device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is a paper provided with a device for returning a carriage paper guide opened for ribbon replacement when the upper unit is returned from a tilt-up state to a printing state. The present invention relates to a printer with a guide returning device.

[Prior Art] Conventionally, when replacing a ribbon or removing a paper jam, a printer is configured to be tilted up by removing an upper unit rotatably mounted at a fulcrum of a supporting unit of the lower unit from a lock of the lower unit. Are proposed as shown in FIG. In FIG. 3, a paper guide 2 is attached to the lower unit 1.
Is fixed, a platen 3 is attached to a rear stage of the paper transport path of the paper guide 2, a lock shaft 4 is attached to a rear stage of the paper transport path from the platen 3, and a lower unit 1 is attached to a rear portion of the lower unit 1. The support unit 5 is integrally provided, and the tilt fulcrum 6 of the support unit 5 allows the upper unit 7 to move.
Is rotatably mounted. A carriage 9 provided with a print head 8 in front of the upper unit 7 is supported by transport shafts 10 and 11, and one end of a carriage paper guide 12 is rotatably supported below the carriage 9. Further, a ribbon cassette 13 is mounted on the upper portion of the print head 8, and the print ribbon pulled out from the ribbon cassette 13 is set between the print head 8 and the carriage paper guide 12. Further, the lock cam 14 is rotatably supported by the support shaft 15 on the lower portion of the upper unit 7, and the upper portion of the lock cam 14 is connected to the other end of the spring 16 whose one end is fixed to the lower portion of the upper unit 7. A wire 17 which is pulled to a substantially horizontal rear portion and whose one end is fixed to an upper portion of the lock cam 14 is hooked on a pulley 18 provided in the vicinity of the carriage 9 to be reversed, and is also provided above one end of the spring 15. The pulley 16 is directed upward, and the other end of the wire 16 is fixed to the lower portion of the release lever 20 near the other end. The release lever 20 has one end rotatably mounted by a support shaft 21, and the other end pulled downward by a spring 22. Further, the connecting portion 23 is fixed to the connecting portion of the other end of the wire 16 of the release lever 20, one end of the link 24 is connected to this connecting portion 23, and one end of the lock claw 25 is connected to the other end of the link 24. And, in addition, the lock claw 25
The other end of is engaged with the protrusion 5a of the support portion 5 of the lower unit 1.

In the conventional printer configured as described above, the state shown in FIG. 3 is a state in which the upper unit 7 is tilted up, and the upper unit 7 is supported by the lock claw 24 engaging with the protrusion 5a of the support portion 5. It is fixed.

When the carriage paper guide 12 is pushed downward in this state, as shown in FIG. 4, the spring 26 provided between the carriage 9 and the carriage paper guide 12 opens beyond the spring maximum load point and holds that position. In that state, the ribbon is removed and the ribbon cassette 13 is replaced. When the end of the carriage paper guide 12 is pushed upward after setting the ribbon, the spring 26 returns beyond the spring maximum load point as shown in FIG.

Next, as shown in FIG. 6, when the release lever 20 is rotated upward, the lock claw 25 connected to the connection portion 23 of the release lever 20 via the link 24 is projected on the support portion 5 of the lower unit 1.
After being released from 5a, the upper unit 7 can be rotated downward. At this time, the lock cam 14 is rotated by the wire 16 routed by the pulleys 18 and 19. The rotation device of the lock cam 14 is provided to release the lock when the upper unit 7 is tilt-locked to the lower unit 1 from the tilt-up state.

When the upper unit 7 is rotated and lowered in this state, the lock cam 14 contacts the lock shaft 4 as shown in FIG. 7, and when the upper unit 7 is further lowered, the lock cam 14 rotates in the arrow direction. Then, as shown in FIG. 8, when the lock cam 14 gets over the lock shaft 4, it is returned by the spring 16 in the direction of the arrow, the lock cam 14 is fixed to the lock shaft 4, and the upper unit 7 is locked to the lower unit 1.

[Problems to be Solved by the Invention] By the way, in the conventional printer configured as described above, when the carriage paper guide 12 is forgotten to be tightened after the ribbon is replaced in the state of FIG. In this state, the carriage paper guide 12 may hit the paper guide 2 or the platen 3 fixed to the lower unit 1, and the carriage paper guide 12 may be broken when the upper unit 7 is forced down.

According to the present invention, a return member that engages with the lock cam is attached to a pulley for hanging a wire, and when the lock claw of the upper unit is released or the upper unit is lowered to engage the lock cam with the lock shaft, It is an object of the present invention to provide a printer with a paper guide returning device configured to push up the carriage paper guide to the upper part by the rotation of the lock cam.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a print head which is rotatably connected to a lower unit by a fulcrum and which is reciprocally moved by a carriage device. A ribbon cassette is provided in the vicinity of the carriage, a rotating carriage paper guide is provided below the print head, and means for fixing the upper unit to the upper position where the upper unit is rotated and means for releasing the means. And a means for fixing the upper unit and the lower unit at the regular printing position, wherein the opening position is linked with the means for releasing the upper unit upper position or the means for fixing the upper unit at the regular printing position. The carriage paper in 1 is returned to the closed position.

[Operation] According to the present invention, even when the carriage paper guide is lowered when the upper unit is lowered, when the lock cam is rotated by hitting the lock shaft,
By the rotation of the lock shaft, the return member rotatably mounted on the pulley for hanging the wire pushes up the carriage paper guide to close it, and thus the carriage paper guide can be prevented from being damaged. When the lever is moved to release the lock claw, the wire is pulled and the lock cam rotates. At this time, since the pulley rotates, the return member rotates, so that the carriage paper guide that was forgotten to be closed can be closed.

[Embodiment] Referring to FIG. 1, in a paper guide returning device of one embodiment of the present invention, 4 is a lock shaft, 8 is a print head, 9 is a carriage, 10 and 11 are conveying shafts, and 12 is a carriage paper guide. , 16 is a spring, 17 is a wire, and 18 is a pulley, and the structure thereof is almost the same as the above-mentioned conventional example, so the description thereof is omitted, but in the present embodiment, it is possible to rotate about the shaft of the pulley 18. The return member 27 is attached. This return member 27 is constantly in contact with the lock cam 14 and
When 14 rotates about the support shaft 15, it returns to the closed position as shown in FIG. 2 while being in contact with the carriage paper guide 12 as shown in FIG.

In this embodiment having such a configuration, when the upper unit 7 is in the state shown in FIG. 3, when the lever 20 is moved to release the lock claw 25, the wire 17 is pulled and the lock cam 14 is released.
Rotates. At this time, the return member is pushed by the lock cam 14.
27 rotates, and the missed closing paper guide 12 can be closed.

6 and 7, the upper unit 7 may stop due to the balance of a spring (not shown) while the lock claw 25 is not engaged with the protrusion 5a of the support portion 5 of the lower unit 1.
When the upper unit 7 is locked from this state, the lever 20 may not be operated, but in this case, the carriage paper guide 12 is lowered.

Also in this case, when the lock cam 14 hits the lock shaft 4 as shown in FIG. 1, the lock cam 14 is rotated by the lock shaft 4, and as shown in FIG.
Is rotated and the carriage paper guide 12 is pushed up and closed to form a double safe device.

[Advantage of Invention] Since the present invention is configured as described above, when the upper unit is locked, the carriage paper guide can be closed by operating the lever that releases the lock claw, and the carriage paper guide is opened. Even if the upper unit is pushed down in this state, there is an effect that the lock cam contacts the lock shaft and the return member can be rotated to close the carriage paper guide.

[Brief description of drawings]

FIG. 1 is a block diagram of a paper guide returning device according to an embodiment of the present invention, FIG. 2 is a view showing a state where a carriage paper guide is returned by the paper guide returning device of FIG. 1, and FIG.
The figure shows a state in which the upper unit is tilted up in a conventional printer, FIG. 4 shows the state in which the carriage paper guide is opened in the printer in FIG. 3, and FIG. 5 shows the printer in FIG. 6 is a view showing a state in which the carriage paper guide is closed, FIG. 6 is a view showing a state in which the upper unit is tilted up and the lock claw is removed in the printer of FIG. 3, and FIG. 7 is a view of FIG. FIG. 8 is a diagram showing a state in which the upper unit is lowered with the carriage paper guide open in the printer, and FIG. 8 is a diagram showing a state in which the upper unit is locked to the lower unit in the printer of FIG. 4 ... Lock shaft, 8 ... Print head, 9 ... Carriage, 10, 11 ... Conveying axis, 12 ... Carriage paper guide, 16 ... Spring, 17 ... Wire, 18 ... Pulley,
27 …… Returning member.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B41J 25/316

Claims (1)

(57) [Scope of utility model registration request] 1. An upper unit rotatably connected to a lower unit by a fulcrum, a print head reciprocated by a carriage device is provided on the upper unit, and a ribbon cassette is provided in the vicinity of the carriage. A carriage paper guide that rotates is provided at the bottom, and means for fixing the upper unit to the upper position where the upper unit is rotated, means for releasing it, and fixing the upper unit and the lower unit at the regular printing position. In the printer provided with the means, a paper guide returning device having a structure for returning the carriage paper at the open position to the closed position in association with the means for releasing the upper unit upper position or the means for fixing the upper unit to the regular printing position. Printer.