JPH0243737Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a paper setting device for a printer that places printing paper in a printing section along the platen in a printer that prints in conjunction with the movement of a carriage along the platen.

Conventionally, for example, to place printing paper along the platen, the paper was inserted from behind the platen, the platen was rotated and the paper was inserted from the rear of the platen, and the platen was rotated and the paper was placed in front of the platen. A paper guide fixed to the front of the carriage allows the paper to be pulled out to the operator's side and moved along the platen. The paper was then placed between the platen and the paper bail. However, in such conventional devices, when loading narrow paper, if the paper is set on the platen at a position away from the carriage stop position in the direction of movement, as shown in Figure 2, the paper cannot be fixed to the carriage. Since the paper guide is separated from the paper and does not guide the paper, the operator must have to push the paper between the paper guide and the paper bail, which is a tedious operation. There were drawbacks such as breakage.

The purpose of this invention is to eliminate the above-mentioned drawbacks by reciprocating the carriage when setting paper.

Hereinafter, an embodiment of this invention will be described with reference to the drawings.
It is supported on the machine frame so as to be rotatable about a fixed axis along the left-right direction in the figure, and the motor PM is connected to one end. A pair of rollers 10 and 11 (Figs. 4A to 4C) are supported on the machine frame 1 so as to be in pressure contact with the lower end of the platen 2, and the paper feeding drive means is controlled by the rollers 10 and 11, the platen 2, and the motor PM. Configure. A carriage 3 supported on a machine frame so as to be movable parallel to the platen 2 has a type wheel 4 rotatable about a fixed axis in conjunction with a motor M mounted on its upper surface. In addition, a paper guide 5 is fixed on the front surface of the carriage 3 in the vicinity of the platen 2 in order to bend and guide the paper P along the outer peripheral surface of the platen 2, and as shown in FIG. Both side edges 5a of the paper guide 5 are bent toward the front side away from the platen 2 so that the edges do not come into contact with the side edges of the paper P. A pair of operating levers 6, 6 supported swingably about support shafts 6a, 6a on both outer surfaces of the machine frame 1, respectively, are supported by a plurality of rubber rollers 8.
The paper bail 7 fitted with the paper bail 7 is supported on support parts 6b, 6b above the support shafts 6a, 6a so as to be rotatable about the rotation axis with the platen 2. Pressing position (4th B,
4c) and a remote position (fourth
(Fig. A), and can be applied with elastic force in either direction by a spring 9.
Further, a protrusion 6c is formed at the lower end of one of the operating levers 6, and a starting switch is positioned opposite to the protrusion 6c.
The BSW is disposed in the machine frame 1, and the starting switch BSW is turned on by pushing the protrusion 6c by moving the operating lever 6 located at a remote position in the direction of arrow S in FIG. 4A.

Next, the control circuit of this invention will be explained.
In FIG. 5, the CPU is a well-known central processing unit with arithmetic and input/output functions, and is connected to the platen 2 based on the flow shown in FIG. Controls the connected motor PM and carriage drive means CD. That is, in Fig. 6, it is first determined whether the start switch BSW is on or off, and if it is on, it starts the motor PM clockwise (Fig. 1) and moves the carriage 3 at a constant speed in the left-right direction (Fig. 2). ) to reciprocate. In this way, it is determined whether or not the motor PM has rotated by a predetermined angle, that is, the angle at which the paper P can be transferred to a position where it can be held by the rubber rollers 8 of the paper bail 7. When the motor PM reaches the predetermined angle, the carriage 3 and the motor Stop PM.

This invention has the above configuration, and its operation will be explained next.

At the remote position of the operating lever 6, insert a narrow sheet of paper P between the rear part of the platen and the machine frame 1, and move the upper end of the operating lever 6 in the direction of arrow S (fourth A).
When the protrusion 6c comes into contact with the start switch BSW and the start switch BSW is turned on, the cartridge 3 starts reciprocating and the motor starts moving.
The PM begins to drive clockwise (Fig. 1), which causes the platen 2 to rotate clockwise, and the paper P is held between the platen 2 and rollers 10 and 11 on the front side of the platen 2 (Fig. 4A). left side).
Next, push the operating lever 6 in the T direction (FIG. 4A) to move the operating lever 6 to the pressure contact position, and press the rubber roller 8 of the paper bail 7 against the platen 2.
(FIG. 4B) Since the platen 2 is rotating clockwise, the paper bail 7 follows and rotates counterclockwise. In this way, when the raw edge of the paper P held between the platen 2 and the rollers 10 and 111 is transferred from below the platen 2 to the front, if the paper guide 5 is not facing the paper P,
(See Figure 2) The paper P is moved forward without following the outer peripheral surface of the platen 2, but since the carriage 3 is constantly reciprocating at this time,
As the carriage 3 moves in the L direction (Figures 2 and 3), the paper guide 5 fixed to the carriage 3 moves to the L direction.
direction (Figs. 2 and 3) and soon comes into contact with the paper P, and as shown in Fig. 3, the leading edge of the paper P is pressed along the outer peripheral surface of the platen 2 by the paper guide 5 (Fig. 4c). ). In this way paper P
When the tip of the paper bail 7 is pinched between the platen 2 and the rubber roller 8 of the paper bail 7, the motor
The PM stops and the reciprocating movement of the carriage 3 also stops.

As described above, according to this invention, in a paper setting device in which printing paper is set by guiding the printing paper between a platen and a paper bail using a paper guide fixed at the front of the carriage, the paper guide is fixed at the front of the carriage. Since the carriage is made to reciprocate for a predetermined period of time, the paper guide can guide the paper no matter where in the row direction the narrow paper is inserted, thus preventing errors in paper setting. This has the effect of preventing this and improving workability.

In the above embodiment, the start switch BSW is operated by the operation lever 6, and this operation starts the paper feed motor PM and the carriage drive means at the same time. However, it is preferable to provide a separate start switch for the carriage drive means. You can also do this.

Further, the platen may be rotated manually when setting the paper.

[Brief explanation of drawings]

Figure 1 is a perspective view of the printer, Figure 2 is a diagram of the paper and paper guide separated from each other, Figure 3 is a diagram of the shape of the side end of the paper guide, and Figures 4A to 4c.
The figures show various positional relationships between the operating lever and the platen, FIG. 5 is a block diagram of the control circuit, and FIG. 6 is a flowchart of the control state.

Claims (1)

[Claims for Utility Model Registration] Printing between a platen 2 supported on a machine frame 1, a carriage 3 equipped with printing units 4 and M and supported on the machine frame so as to be movable parallel to the platen, and the platen. A paper bail 7 is supported on the machine frame parallel to the platen so as to be able to hold the paper, and the upper end is attached to the outer peripheral surface of the platen so as to bend and guide the printing paper in the direction between the paper bail and the platen. It is bent along the front side of the carriage and is fixed to the front surface of the carriage so as to closely face the platen, and the side edge is bent in the direction away from the platen so that the printing paper can enter between the platen and the platen from the direction of movement of the carriage. A starting switch BSW that can generate a starting signal by manual operation; A carriage drive means CD that is electrically operated and enables the carriage to reciprocate by actuation; A control circuit CPU for controlling a carriage driving means to reciprocate until the rear paper is held between a paper bail and a platen.