JPH0245178A - Printer device - Google Patents

Abstract

PURPOSE:To prevent the extraction of a form cassette at the time of printing operation, and to obtain a printer device capable of stably carrying a form by installing a locking member fixing the form cassette at the position of mounting and interlocking the locking member with the operation of a printer mechanism unit. CONSTITUTION:The projecting section 9a of a lever 9 is moved along a cam groove 15a, and the lever 9 is turned centering around a shaft 25. A spring peg 9b is formed on the side opposed with the projecting section 9a of the lever 9 and the shaft 25 in between, and connected to a lever 7 through a spring 10 and a connecting rod 8. When the connecting rod 8 is shifted in the direction E, the locking lever 7 is turned in the direction K, and engaged with the opening lever 7 is turned in the direction K, and engaged with the opening section 2b of a form cassette 2. The form cassette 2 cannot be drawn out in the direction F under the state. When a head unit 20 is elevated, a cam 15 is rotated in the direction D, the locking lever 7 is also lowered, and engagement with the form cassette 2 is released, thus freely pulling out the form cassette 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer device, and particularly to a lock for a paper cassette thereof.

[Conventional technology]

FIG. 14 is an overall configuration diagram showing a conventional printer device, in which (1) is an attachment plate, (2) is a paper cassette that is removably attached to the mounting position of the attachment plate (1), and (3) ) is the paper loaded in the paper cassette (2),
(4) is the printer mechanical unit installed on the installation space (1), (5) is the paper cassette (2) installed on F or G.
These are two pairs of guides that can be slidably guided in the direction.

Next, the operation will be explained. After loading the paper (3) into the paper cassette (2), the user mounts the paper cassette (2) in the G direction using the guide (5).

Once the paper cassette (2) has been installed as shown,
Instructs the printer mechanical unit (
4) starts a predetermined printing operation according to the above instruction.

[1ll to be Solved by the Invention] Since the conventional printer device is configured as described above, the user can easily take out the paper cassette (2) (in the F direction) even during the printing operation. This has a negative effect on the conveyance of paper during printing operations, causing problems such as skewed paper feeding and paper jams.

This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a printer device that can prevent paper cassettes from being taken out during printing operations and can stably transport paper. .

[Means to solve the problem]

In order to achieve the above object, a printer device according to the present invention includes a locking member for fixing a paper cassette in a mounting position, and by interlocking this locking member with the operation of the printer mechanical unit, the printer device according to the present invention The cassette is fixed by a locking member and cannot be removed from the mounting position.

[For production]

In this invention, when the printer mechanical unit is in operation, the paper cassette is fixed at the mounting position by the locking member that is driven by the operation of the printer mechanical unit.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 13. In the drawings, the same or corresponding parts as those of the conventional device are given the same reference numerals, and the description thereof will be omitted. In Figure 1, (
6) is a detection switch that engages with a convex portion (2m) of the paper cassette (2) at the position where the paper cassette (2) is installed. (7) is a lock lever located at the bottom of the paper cassette (2), and when the paper cassette (2) is installed, it is in a positional relationship with the opening (2b) of the paper cassette (2) to release the charge. be. A connecting rod (8) is connected to a lever (9) provided on the printer mechanical unit (4) by a spring (10).

In Figure 2h, (11) is the frame, (12) is the drive motor, (13) is the worm gear attached to the motor shaft, (14) is the gear, and (15) is the rotating shaft (16).
) gear with cam attached to (17) (・18)
is a detection switch that detects the rotational position of the rotational axis α, and the position is detected by a light shielding plate (19) attached to the rotational axis (16). (20) is a head unit, which is pivotally supported by a rotating shaft (21) fixed by a frame (11). (22) is a cam attached to the rotating shaft (16), and (23) is a shaft attached to the head unit (20), which comes into contact with the cam surface of the cam (22).

, In FIG. 3, (24) is the head unit (20)
The bar hanger formed on the and pace (1) is a bar that is attached between the part (1a) and the head unit (20).
It is biased to rotate in the direction.

In Fig. 10, % (25) is a shaft that pivotally supports the lever (9), (9m) is a convex portion formed integrally with the lever (9), and a grooved cam ( 15m
) is engaged with. (9b) is a spring hook formed integrally with the lever (9).

In FIG. 12, (26) is a lock lever (a shaft on which force is rotatably supported).

Next, the operation will be explained.

Figure 1 shows a paper cassette (2) loaded with paper (3).
is set at a predetermined mounting position on the printer device. At this time, the detection switch (6) comes into contact with the protrusion (2a) of the paper cassette (2) and the paper cassette (9)
2) is detected to be in a predetermined position. In this state, the operator can freely move the paper cassette (2) in the G or F direction. If the paper cassette (2) is not set enough or if it is pulled out intentionally, the detection switch (6) turns OFF and it is determined that the paper cassette (2) is not in the specified position. It is now impossible to proceed to the next action.

When the paper cassette (2) is in the specified position and the operator gives instructions for the next operation, the printer mechanical unit (4)
starts the operation and slightly moves the paper (3) in the direction A (the transport operation is omitted).

Next, the operation of the printer mechanical unit (4) will be explained. In response to an operation instruction, the motor (12) shown in FIG. 2 starts rotating clockwise, and rotates the cam gear (15) via the worm (13) and the reduction part of the gear (14). Since the cam gear (15), cam (22), and light shielding plate (19) are all fixed to the rotating shaft (16),
It rotates in synchronization with the rotation of the motor (12).

First, the head unit (20
) operation is explained. Figures 3 and 6 show an initial state in which the printer mechanical unit (4) is not operating, and at this time, the head unit (20)! l1l(21
) is a pivot axis, and is urged by a spring (24) to rotate in the H direction. The shaft (23) disposed at the right end of the head unit (20) is connected to the cam surface (2) of the cam (22).
2a), which causes the head unit) (
20) initial position is defined.

Here, the initial position of the head unit (20) will be referred to as the first position of the head.

FIGS. 5 and 8 show positions where the printer mechanical unit (4) can print on paper (3). Motor (12
) rotates, the cam (22) also rotates in the direction C in the figure, and the cam surface (22c) pushes the shaft (23) from the position shown in Figure 6 to the position shown in Figure 8, causing the head unit to rotate). The position of (20) is defined. This position will be referred to as the second position of the head.

FIGS. 4 and 7 show the position fi! between the first and second positions of the head. L, its position is defined by the cam surface (22b). This intermediate position will be referred to as the third position of the head.

Therefore, the head unit (20) has three positions. In order to operate as described above, the motor (12
) rotates clockwise, the cam (22) rotates in the C direction, and the head unit (20) descends in the C direction. When the motor (12) rotates counterclockwise, the cam C22
) rotates in the D direction, and the head unit ) (20) rises in the H direction. Next, control of these three positions will be explained.

FIG. 9 is a timing chart showing the positional relationship between the detection switches (17) (18) and the head unit (20). The rotation of the cam (22) is detected by a light shielding plate (19) fixed to the rotating shaft (16) using a detection switch (17).
(1B) is turned 0N-OFF, and as shown in Fig. 9, the point where the detection switch (17) turns OFF and the detection switch (18) changes from OFF to ON is the first position. is from OFF to ON, and the point where the detection switch (18) is ON is the third position, and the point where the detection switch (18) is ON is the third position.
7) is turned on, and the point where the detection switch (18) changes from ON to OFF is the second position.

Next, regarding the locking operation of the paper cassette (2), the first
This will be explained with reference to FIGS. 0 to 13.

FIG. 10 shows the aforementioned head unit (20) in the first position, and at this time, as shown in FIG. 12, the lock lever (7) is at the bottom of the paper cassette (2).
paper cassette (2) without interfering with the paper cassette (2).
2) can be slid in direction G or F in FIG.

Figure 11 shows the head unit (20) in the second and third positions, and when the head unit (20) descends in the working direction, the cam groove (15a) formed in the cam (15) ) of the lever (9) engaged with the convex portion (9a)
moves along the cam groove (15a), and the lever (9) rotates about the shaft (25). The convex part of the lever (9) (
A spring (10) and a connecting rod (8) are formed on opposite sides of the shaft (25).
) is connected to the lever (7).

In Fig. 13, when the connecting rod (8) moves in the E direction, the lock lever (7) rotates in the direction, and the paper cassette (2
) in the opening (2b). In this state, the paper cassette (2) cannot be pulled out in the F direction.

When the head unit (20) rises, the cam (15) rotates in the D direction, and the lock lever (force) also falls and disengages from the paper cassette (2), allowing you to freely move the paper cassette (2). It can be pulled out.

This concludes the explanation of the operation.

〔Effect of the invention〕

As described above, according to the present invention, when the printer mechanical unit starts operating, the lock lever that fixes the paper cassette in the installed position operates. This has the effect of stably transporting paper that cannot be taken out.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing a printer device according to an embodiment of the present invention, FIG. 2 is a plan view of the printer mechanical unit, and FIGS. 3 to 5 are main points of the head drive section explaining the operation of the head unit. FIGS. 6 to 8 are side views of essential parts explaining the operation of the detection switch that detects the head position. FIG. 9 is a timing chart showing the detection switch and the head position. FIGS. 10 and 11 12 and 13 are side views of essential parts of a paper cassette fixing section, and FIG. 14 is an overall configuration diagram showing a conventional printer device. In the figure, (2) is a paper cassette, (3) is paper, (
4) is a printer mechanical unit (force indicates a locking member). Note that the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A printer device comprising a paper cassette that stores paper and is removably mounted, and a printer mechanical unit that prints on paper from the paper cassette, including a locking member that fixes the paper cassette in the mounting position. , a printer device characterized in that the locking member is interlocked with the operation of the printer mechanical unit, so that the paper cassette is fixed by the locking member and cannot be removed from the mounting position when the printer mechanical unit is operating. .