JPH0650200Y2 - Deflector for printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application The present invention can be applied to a printing device such as a printer, a plotter, a typewriter, or the like, which is equipped with an optional device such as a foam tractor or an automatic paper feeding device. For more information,
In such a printing apparatus, the present invention relates to a deflector for guiding a supply sheet between a platen and a feed roller.

2. Description of the Related Art Conventionally, for example, in a printer, as shown in FIG. 7, a deflector (2) which is curved from the rear side of the platen (1) to the lower side and along the outer periphery of the platen (1) toward the front side is arranged and supplied from above. The paper (3) was guided between the platen (1) and the rear feed rollers (4) ... And the front feed rollers (5). Further, the deflector (2) has its rear upper part (2a) brought as close as possible to the platen (1) to prevent the paper (3) from rising from the platen (1) to prevent the print quality from deteriorating.

The problem to be solved by the invention is that when the rear upper part (2a) of the deflector (2) is brought close to the platen (1) as shown, the rear upper part (2a) interferes with the platen (1). It is difficult to supply the paper from the rear side, and there is a problem that the foam tractor cannot be arranged behind the platen (1) (the foam tractor cannot be arranged in a so-called horizontal type).

Further, when using the automatic feeding device, the paper (3) discharged from the device must be reliably guided between the platen (1) and the rear feed roller (4) .. Since it cannot be maintained, a guide member such as mylar paper is attached to the automatic feeder to guide the paper (3) discharged from the device to the deflector (2). However, if the rear upper part (2a) of the deflector (2) is as close as possible to the platen (1) as described above, the guide member will hit the deflector (2) and cannot reliably guide the paper when the automatic sheet feeder is attached. . Therefore, if such a guide member is removed, there is a problem that the guide of the paper becomes insufficient and the print quality deteriorates.

Therefore, an object of the present invention is to provide a deflector for a printing apparatus that can always obtain good printing quality without limiting the mounting position of an optional device such as a foam tractor or an automatic paper feeding device.

Means for Solving the Problems Therefore, the deflector for a printer according to the present invention is
For example, as shown in Fig. 1, the front part (1
With respect to 1), the rear part (12) can be rotated between a guide position close to the platen (28) and a retracted position separated from the platen (28), and the rear part when the optional device is not attached to the printer main body. (12) is installed by rotating it to the guide position based on the urging force, and when it is installed, it is pushed by the optional device at the time of installation and rotated to the retracted position against the urging force. It is characterized by

When the optional device is not attached to the printer body, the rear part (12) is rotated and held to the guide position based on the urging force, and the supply sheet (29) is guided by the platen (28) as much as possible. , Hold the paper (29) from rising and guide it to the print position.

When an optional device is installed, push it with it to rotate the rear part (12) to the retracted position against the biasing force,
The optional device is set to the optimum position, and the supply paper (43) from the optional device is guided by the front part (11) to be guided to the printing position.

Embodiment Hereinafter, the present invention will be described concretely and in detail based on an embodiment shown in the drawings.

1 (A) and 1 (B) show a deflector (10) for a printer according to the present invention. As can be seen from the figure, the deflector (10) according to the present invention is formed by integrally curving the whole along the outer periphery of the platen like a normal deflector, and is divided into front and rear parts (11) and rear part. (12) Make from

In the front part (11), a plurality of front roller windows (13) are opened in the front in parallel with the platen axis, and a plurality of notches (14) opening outward in the rear are also formed in the platen. Open parallel to the axis. Then, on both sides, a mounting piece (15) and a bending piece (16) are formed by bending them at right angles to the back side, and the front end hole (15) of the mounting piece (15) on the front side is formed.
It is rotatably supported by a support shaft (not shown) that passes through a). A screw hole (16a) is formed at the tip of the bent piece (16) on the rear side. In addition, the upper edge has a notch (14)…
Except for the part, it is bent toward the back side to form a slightly extending stopper part (11a).

On the other hand, in the rear part (12), a plurality of notches (20) that open downward are made parallel to the platen axis, corresponding to the notches (14) in the front part (11). The corresponding notches (14) and notches (20) form one rear roller window (21), and a plurality of them are formed in parallel with the front roller window (13) of the front part (11). Set up. Then, on both sides, arm pieces (22) are respectively bent toward the back side at a right angle and bent toward the front part (11) side. In addition, the lower edge has a notch (20) .. Except for the part, it is bent toward the back side to form a bent part (12a) that extends slightly, and the upper edge is bent as a whole toward the back side and greatly inclined. A guide part (23) is formed. Then, both sides of the guide portion (23) are extended to the left and right to form abutting portions (23a) and (23a).

Then, put the stud (25) around the spring (24),
After being inserted into the tip hole of the arm piece (22), the arm piece (22) is screwed into the tip screw hole (16a) of the bending piece (16). This allows the front (1
The rear part (12) is made rotatable with respect to 1), one end of the spring (24) is pressed against the back surface of the front part (11), and the other end is pressed against the back surface of the rear part (12). As shown in FIG. 1 (A), when the optional device is not attached to the printer main body, the rear part (12) is rotated to the guide position based on the urging force, and the arm piece ( 22) to the front (1
Stop by hitting the tip of the stopper (11a) in 1).

Therefore, during normal use without an optional device,
As shown in FIG. 2, the rear part (12) holds a predetermined gap with the platen (28), and the deflector (10) is brought close to the platen (28) as a whole. Therefore, as shown in the figure, the paper (29) inserted from above is guided by the deflector (10) to a space between the platen (28) and the rear feed roller (30) and the front feed roller (31). Be guided. The deflector (10) provided as close to the platen (28) as possible prevents the sheet (29) from rising from the platen (28) and ensures good print quality.

By the way, as shown in FIG. 3, for example, the platen (28) hangs its platen shaft (34) between the left and right side plates (36) and (36) of the apparatus main body through the bearings (35) and (35). Pass and support. Then, the deflector (10) is arranged below the platen (28). And then, the platen shaft (34)
The tractor bearings (37) and (37) provided on the left and right of the
Engage the tip latch levers (39) and (39) of the foam tractor (38) shown in the figure, and support them with the support shafts (40) and (40) that stand inward on the side plates (36) and (36). , The foam tractor (38) is mounted on the main body of the apparatus behind the platen (28) in a so-called horizontal type. At this time, the tip projection (41) of the foam tractor (38)
The abutment portion (23) of the deflector (10) described above (41)
Push a) and (23a), and rotate the rear part (12) clockwise around the stud (25) as shown in FIG. 5 to the retracted position against the biasing force. Then, the paper (43) is guided by the paper guide (42) provided to the foam tractor (38), and the paper (43) which is stretched over the platen (28) is guided by the tractor (44) as shown in FIG. It can be transported. That is, the rear portion (12) of the deflector (10) is allowed to escape to secure the path of the paper (43), and the foam tractor (38) can be mounted in a so-called horizontal type.

Also, when the automatic paper feeder is attached, similarly, the projections provided on the device push the abutting portions (23a) and (23a) of the deflector (10), and the rear portion (12) is shown in FIG. As described above, the guide member (48) such as mylar paper attached to the paper discharge port (47) of the apparatus is prevented from coming into contact with the rear part (12) and is rotated against the biasing force. The guide member (48) reliably guides the supplied paper between the platen (28) and the rear feed roller (30).

When an optional device such as a foam tractor or an automatic paper feeder is removed, the rear part (12) is automatically returned to its original position by the force of the spring (24), and the arm piece (22) of the rear part (12). Hits the tip of the stopper part (11a) of the front part (11) and stops.

Therefore, according to this invention, the following effects are obtained.

1) When the optional device is not installed, the deflector placed as close to the platen as possible can prevent the floating of the paper from the pteran, and can ensure good printing quality.

2) An optional device such as a foam tractor can also be arranged behind the platen, and there is no limit to the installation location of the optional device.

3) When using an optional device such as an automatic paper feeder,
The feed sheet can be reliably guided by the guide member such as mylar paper attached to the sheet, and slack of the sheet can be eliminated to always obtain good print quality.

[Brief description of drawings]

FIGS. 1 (A) and 1 (B) show a deflector according to an embodiment of the present invention, FIG. 1 (A) is a side view, and FIG. 1 (B) is a rear view of the deflector as seen from the direction of arrow a. FIG. 2 is a side view showing the deflector in normal use, and FIG. 3 is an explanatory perspective view showing the arrangement of the deflector on the printer main body side.
FIG. 5 is a perspective view of a foam tractor attached to the printer main body, FIG. 5 is a side view when the foam tractor is attached, and FIG. 6 is a side view when an automatic paper feeder is attached. FIG. 7 is a side view showing a usage state of a conventional deflector. (10) …… Deflector (11) …… Front part (12) …… Rear part (28) …… Platen (29) ・ (43) …… Paper (38) …… Form tractor

Claims (1)

[Scope of utility model registration request] 1. A front part is divided into a front part and a rear part, which is rotatable with respect to a guide position close to the platen and a retracted position separated from the platen, when the optional device is not attached to the printer main body. The rear portion is pivotally installed to the guide position based on the urging force, and when the rear part is attached, it is pushed by the optional device at the time of attachment and rotated to the retreat position against the urging force. Deflector for printer.