JPS5924682A - Paper setting apparatus of printer - Google Patents

Abstract

PURPOSE:To prevent the mis setting of narrow width paper, by moving a carriage in opposed relation to the set position of the paper when the paper is set. CONSTITUTION:Narrow width paper P is inserted into a platen 2 from the rear side thereof in such a state that an operation lever 6 is held to a parted state and the left margin LM and the right margin RM of the paper P are set in corresponding relation to the left and the right positions of a line direction occupied by the inserted paper P by operating a keyboard KB. In this state, when the upper end of the operation lever 6 is pulled, from the set values LM, RM of the left margin and the right margin, the intermediate value SP=(LM+ RM)/2 thereof is operated and a carriage 3 is moved to a position S. In addition, the platen 2 starts rotation while the paper P is sent and the leading end of the paper is bent so as to be moved along the platen by the action of a paper guide 5 fixed to the carriage 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper setting device for a printer that prints in conjunction with the movement of a carriage along a platen, in which printing paper is placed in a printing unit along the platen.

Conventionally, for example, in order to place printing paper along a dowel, the paper was inserted from the rear of the platen, the platen was rotated and the paper was pulled out to the front of the platen (to the operator's side), and then the paper was pulled out along the platen. A paper guide fixed to the front of the carriage that can be moved with I was trying to do that.

However, in such a conventional device, when loading narrow paper of +13, if the paper is set on the platen at a position away from the carriage stop position in the moving direction as shown in Figure 2, the paper will not be fixed to the carriage. Since the paper guide does not guide the paper when the paper is separated by 6 cm, the operator has to perform the troublesome operation of pushing the paper between the paper guide and the paper pail. There were drawbacks such as damage to the paper.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional apparatus by moving the carriage to face the paper setting position when setting paper.

Hereinafter, the present invention will be described in detail with reference to the drawings. The platen 2 is rotatably supported on the machine frame about an axis along the moving direction of the carriage 3 (left-right direction in FIG. 1), and has a motor PM at one end. Link. In addition, a pair of rollers 10 and 11 (FIGS. 4A and 4B) are supported on the machine frame 1 so as to be in pressure contact with the lower end of the platen 2, and the rollers 10 and 11 and the platen 2.
The motor PM constitutes a paper feeding drive means. 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. Further, the paper guide 5, which is fixed in front of the carriage 3 in the vicinity of the platen 2, guides the side edges of the paper P between the platen 2 and the side edges 5α of the paper P, as shown in FIG. It is formed in an arc shape along the platen 2 so as to bend toward the front side away from the platen 2 and guide the paper P by bending it along the outer (N) surface of the platen 2. A pair of operating levers 6.6 supported swingably around support shafts 6a and 6α on both outer sides of the machine frame 1 rotate a paper pail with a plurality of rubber rollers 8 fitted therein relative to the platen 2. Support parts 6A and 6 above the support shafts 6° and 6α are rotatable about their axes.
This operating lever 6.6 is supported on the paper pail 7.
The pressing position where the rubber roller 8 of the paper pail 7 is pressed against the outer peripheral surface of the platen 2 (FIG. 4B) and the separating position where the rubber roller 8 of the paper pail 7 is separated from the outer peripheral surface of the platen 2 (FIG. 4A)
The spring 9 can apply an elastic force in either direction. In addition, a protrusion 6c is formed at the lower end of one operating lever 6, and a start switch BSW is disposed on the machine frame 1 opposite to the protrusion 6C, so that the operating lever 6 in a remote position is moved in the direction of arrow S in FIG. 4A. The starting switch BSW is turned on by pressing the protrusion 6C when the starting switch BSW is moved to the side.

The KB is a keyboard consisting of a group of multiple keys arranged on the front of the machine frame 1, including a print key, a space key, and a margin key for controlling the position of the left and right margins (each margin setting value shown below). A left margin LM, a right margin RM), etc. are provided.

Next, the control circuit of this invention will be described.

The CPU is a well-known central processing unit with arithmetic and input/output functions. The motor PM connected to the platen 2 and the carriage drive means CD are controlled based on the flow shown in the figure.

That is, in Fig. 7, after turning on the power, first the left margin L
M, the light margin RM is reset to the leftmost position L Mo where the carriage 3 can move within the machine frame 1.

Next, move the carriage 3 to the leftmost position LM.

Move to the left margin L, M and right margin R
Wait for M setting. The left margin LM and right margin RM are set by operating the keyboard KB in accordance with the position where the printing paper P should be placed.
It is stored at a predetermined address in the storage section of the PU, and when no key operation is performed, both margins are LM o and RM o
It remains as it is. .

Next, it is determined whether the start switch BSW is on or not,
If it is on, calculate the intermediate value sp=(LM+RM)/2 from the set LM and RMO values, move the carriage 3 to the location corresponding to the calculated value sp, and then turn the motor PM clockwise ( 1), it is determined whether the paper P has rotated to a predetermined angle, that is, the angular position where the starting end of the paper P is held between the rubber roller 8 of the paper pail 7 and the platen 2, and the predetermined angle is reached. If not, the motor PM continues to rotate, and when the predetermined angle is reached, the motor PM is turned off and stopped, returning to the state of waiting for the setting of the left margin LM and right margin RM.

The present invention has the above configuration, and the operation will be explained next.

While holding the operation lever 6 in the remote position, remove the narrow paper P.
is inserted from the rear of the platen 2, and a left margin LM and a right margin RM are set as shown in FIG. 5A by operating the keyboard Kn corresponding to the left and right positions in the row direction occupied by the inserted paper P. When the upper end of the operating lever 76 is pulled in the direction of arrow S (FIG. 4A), the protrusion 6c comes into contact with the starting switch BSW, turning on the starting switch BSW.

Then, the left margin and right margin setting values LM
, RM, the intermediate value SP=(LM-1-RM)/2 is calculated, and then the carriage 3 whose printing position is at the leftmost position LMo in FIG. The platen 2 and the rollers 10 . The paper held between the plates 11 and 11 is transferred to the front side of the platen 2 (to the left in FIG. 4A). Next, push the operating lever 6 in the T direction (Fig. 4A) to
to the pressure contact position, and press the rubber roller 8 of the paper pail 7.
When the platen 2 is pressed against the platen 2 (FIG. 4B), since the platen 2 is rotating clockwise, it is rotated counterclockwise following the platen 2. In this way, platen 2 and roller io
When the leading edge of the paper P held between the paper P and the platen 2 is transferred forward from below the platen 2, the paper guide 5 fixed to the carriage 3 has already come to a position facing the paper P, as shown in FIG. 5B. Therefore, the leading edge of the paper P is bent by the paper guide 5 so as to follow the outer peripheral surface of the platen 2, and then the leading edge of the paper P is held between the rubber roller 8 of the outer peripheral tape bail 7 of the platen 2. Then, the motor PM stops, and the setting of the paper P is completed.

Next, other embodiments of the invention will be described.

In this embodiment, the write margin R by the keyboard KB is
Paper P is indirectly set from M and left margin LM settings.
Unlike the above-mentioned embodiment in which the set position of the paper P is detected, the set position of the paper P is directly detected by the paper detecting means provided on the carriage 3.

That is, in FIG. 8, a light emitter (light emitting diode) L is provided at the center of the front surface of the carriage 3 to illuminate the platen 2.
D and a photoreceptor (phototransistor) FT that receives the reflected light from the platen 2 side and generates a detection voltage proportional to the amount of received light, and the reflected light from the outer peripheral surface of the platen 2 and the paper guide 5. When the paper P is interposed between the paper P and the platen 2, the paper P is detected based on the difference in level between the light reflected from the paper P and the light reflected from the paper P.

In the control circuit of this embodiment, instead of the key signal of the keyboard KB of the first embodiment, the detection signal from the paper detection means is input to the CUP via the I10 port. CPU
is related to this detection signal and control switch BSW.
The motor PM connected to the platen 2 and the carriage drive means CD are controlled based on the flow shown in the figure. That is, after turning on the power, the left margin LM and right margin RM are initialized to LMO and RMo, respectively, and the carriage 3 is moved to LMo (leftmost position). Next, it is determined whether the control switch BSW is on or off, and if the control switch BSW is on, the motor PM is turned on and started clockwise (FIG. 1), and the carriage 3 is moved in the direction of the arrow. At this time, if the leading edge of the paper P has not moved to a position where it faces between the platen 2 and the carriage 3, the leading edge of the paper P will not receive light even if the carriage 3 moves from the leftmost position LMo to the rightmost position RMo. The carriage 3 moves in the opposite direction from the rightmost position because the detection voltage of the photoreceptor FT does not rise. When the leading edge of the paper P moves to a position facing the platen 2 and the carriage 3, the paper P is guided between the platen 2 and the carriage 3 by the side edge 5α of the paper guide 5, and the paper P is guided between the platen 2 and the carriage 3 (see FIG. 8). ), the light from the light emitter LD is reflected by the paper P and is received by the photoreceptor FT, so the level of light reception increases and the detection voltage of the photoreceptor FT rises, which causes the front edge of the paper P to The value of the edge position spi is read and stored in a predetermined register.

Next, when the carriage 3 moves to a position where the paper detection means faces the trailing edge of the paper P, the light from the light emitter LD is removed from the paper P, and the reflected light from the outer peripheral surface of the platen 2 is transmitted to the photoreceptor. Since the light enters the FT, the detection voltage of the photoreceptor FT falls, and as a result, the value at the position SP2 of the rear edge of the paper P is read and stored in a predetermined register. And the values SPI stored in the respective registers,
The intermediate value 5P=(SP1+5P2)/2 is calculated from SP2, the carriage 3 is moved and stopped at the position corresponding to the intermediate value sp, and then the leading edge of the paper P is aligned with the outer periphery of the platen 2 and the rubber roller 8 of the paper pail 7. When the paper P is sandwiched between the two, the motor PM is stopped and the setting of the paper P is completed.

As described above, according to the present invention, in a paper setting device in which printing paper is set using a paper guide installed in front of a carriage, calculation or detection means is performed based on set values of the right margin and left margin of the carriage. When setting paper, the carriage is moved to a position facing the paper based on the set position of the paper calculated by detecting the front and rear edges of the paper. Even when inserted, the paper can be guided between the paper pail and the platen by the paper guide supported on the carriage, which has the effect of preventing paper setting errors and improving work efficiency.

Incidentally, in the above embodiment, when setting paper, the platen is rotated by the motor PM so that the platen is rotated by a force of 0.degree. C. (this rotation may also be performed manually).

[Brief explanation of the drawing]

Figure 1 is a perspective view of the printer, Figure 2 is a diagram showing the paper and paper guide separated from each other, Figure 3 is a diagram showing the shape of the side edge of the paper guide, Figure 4A is a diagram showing the operation. Diagrams 5A to 50 showing operating positions of levers
The figure shows the positional relationship between the carriage and paper, Figure 6 is a block diagram of the control circuit, Figure 7 is a 70-chart of &1 control status, and Figure 8 is paper position detection for other embodiments. FIG. 9G is a 70-chart of the control state of another embodiment. Patent applicant Tokyo Heavy Equipment Industry Co., Ltd.-38 ( ) vl1 figure Makoto 9 figure

Claims (1)

[Claims] A platen 2 supported on a machine frame 1, a printed body 4. Carriage 3 is mounted with M and is supported on the machine frame so as to be movable parallel to the platen, and the carriage 3 is movable toward and away from the platen, and the platen is always mounted so that the printing paper is held between the carriage 3 and the platen. The paper pail 7 is supported on the machine frame parallel to the platen and receives an elastic force in the direction of contact with the paper pail and the platen. A paper guide 5 is fixed to the front surface of the carriage with its tip facing closely to the platen so as to guide the paper guide in a direction perpendicular to the moving direction of the carriage, a starting switch BSW capable of generating a starting signal by manual operation, and an electric a carriage moving means CD which operates automatically and enables the carriage to reciprocate and stop at any position; and setting means KB and LD which generate different position signals corresponding to the set position of the paper with respect to the platen. FT; and a control circuit cp1 for controlling carriage driving means CD to move the carriage to face a paper setting position based on a position signal and in relation to an activation signal.