JPH0570015A - Medium feed out mechanism - Google Patents

Abstract

PURPOSE:To provide a medium feed out mechanism which can change an angle in the feed direction of a feed roller to feed out a medium, and moreover have a simplified mechanism and improved cost. CONSTITUTION:A medium feed out mechanism which severally sandwichedly holds a medium between at least a pair of feed rollers 2, 3 being vertically opposite and feeds it out, and then accumulates it in an accumulating section 4 is provided with an indicating means 16 to indicate accumulation in which the position of the medium 1 is shifted and a direction changing means 8 to change the direction of the feed rollers 2, 3 by a fixed angle, and when the change is indicated, the direction of the feed rollers 2, 3 which are feeding out the medium 1 are changed by the fixed angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium feeding mechanism such as a printer, and more particularly to a medium feeding mechanism capable of feeding a medium by changing the angle of the feeding direction of a feeding roller.

Recently, a printer such as a wire dot printer has been used as an output device for a personal computer, a word processor, and the like, and these printers are provided with an arbitrary number of printed documents by shifting the delivery stacking position and separating them. Although a so-called offset mechanism is provided, it is not preferable because it is a large-sized mechanism or a method in which the mechanism is divided by shifting the angle, and therefore a method for shifting the positions in parallel with a simple mechanism is desired.

[0003]

2. Description of the Related Art As shown in a perspective view of a prior art example (1) of FIG. 8, for example, a printing paper 1a printed by a printer is vertically fed so as to feed it in a direction of an arrow A, and a feeding roller 2a and a pressing roller 3a.
Is provided, and the stacker 4a is arranged in front of it.

The stacker 4a is configured to move in the directions of arrows B and C by a moving mechanism (not shown). Therefore, the printing paper 1a that is nipped and conveyed by the feed roller 2a and the pressing roller 3a is accumulated on the stacker 4a.

At this time, when a desired number of sheets of printing paper 1a are displaced on the stacker 4a to make a division, a stacker is used.
4a is shifted in the direction of arrow B, and the printing paper 1a is shifted and stacked as shown in the figure.

Alternatively, although not shown, there is also a method in which a stacker having no side wall is horizontally rotated by 90 degrees so that the print sheets 1a are stacked in a cross shape and separated. Further, the conventional example of FIG.
As shown in the perspective view of (2), one ends of the shafts 5 and 6 of the feed roller 2a and the pressing roller 3a are supported by the side frame 7 so as to be movable in the horizontal direction. The position of the stacker 4a is fixed.

Therefore, when one ends of the shafts 5 and 6 are displaced in the direction of the arrow D, the feeding roller 2a and the pressing roller 3a feed the printing paper 1a obliquely, and the printing papers 1a are stacked obliquely as shown in the drawing. Can be separated.

[0008]

According to the above conventional method, in the method of the conventional example (1), since the stacker is moved in the lateral direction, the moving mechanism for moving the strong stacker that can withstand the accumulated weight of the printing paper, That is, a motor and gears are required, and the mechanism is large and expensive. The method of rotating the stacker horizontally by 90 degrees also has the same drawback. In the method of the conventional example (2), since one end of the shaft of the feed roller and the pressing roller is moved in the horizontal direction, the mechanism is relatively simple and the cost is low. It's just that, so users don't like it. There is a problem.

It is an object of the present invention to provide a medium feeding mechanism which has a simple mechanism and can improve the cost.

[0010]

FIG. 1 is a diagram showing the principle of the present invention, in which (a) is a plan view and (b) is a side view. In the figure, 1 is a medium, 4 is a stacking unit, 2 and 3 are at least one pair of feed rollers which sandwich and feed the medium 1 and which oppose each other, 16
Is an instructing means for instructing the stacking unit 4 to stack the medium 1 by shifting its position, and 8 is the medium 1 in the directions of the feed rollers 2 and 3.
Is a direction changing means for changing a predetermined angle with respect to the sending direction of.

Therefore, when instructed by the instructing means 16, the direction changing means 8 is configured to change the direction of the feed rollers 2, 3 feeding the medium 1 by a predetermined angle.

[0012]

When the medium 1 is displaced and accumulated in the accumulating section 4, the direction changing means 8 changes the direction of the feed rollers 2 and 3 feeding the medium 1 by a predetermined angle when instructed by the instructing means 16. The medium 1 is delivered while moving diagonally forward without changing the angle, and is stacked at a position shifted laterally on the stacking unit 4.

In this way, it is possible to obtain a low-cost medium feeding mechanism with a simple mechanism for shifting the positions of the mediums 1 and accumulating them.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. The same reference numerals denote the same objects throughout the drawings.

The printing paper 1a and the mode instruction button shown in FIGS.
Reference numeral 16a corresponds to the medium 1 and the indicating means 16 of FIG. 1, respectively. The feed roller 2b and the pressing roller 3b of FIG. 2 correspond to the feed rollers 2 and 3 of FIG. 1, and the plunger magnet of FIG. 8a, the moving bar 9, and the arms 12a to 12d are
It corresponds to the direction changing means 8 in FIG.

As shown in the perspective view of FIG. 2, both ends of the side frames 7a and 7b are slidably supported, and a moving bar 9 is provided which moves in the directions of arrows E and F when PM8a is excited / de-energized. ing. The moving bar 9 is formed in a frame shape by connecting an upper support bar 9a and a lower support bar 9b, which are parallel to each other vertically, at both ends.

The lower support bar 9a has one end rotatably supported at fulcrums 10a and 10b, and the other end rotatably supported by support shafts 11a and 11b supported by the apparatus frame 70a. 12
b is attached to the side of arms 12a and 12b
2a ₁ and 2a ₂ are attached by shafts 13a and 13b. Spindle 11a,
Bevel gears G1 and G2 and pulleys P1 and P2 are attached to 11b, and bevel gears G3 and G4 are attached to shafts 13a and 13b.

The bevel gear G1 and the bevel gear G3 are in mesh with each other, and the bevel gear G2 and the bevel gear G4 are in mesh with each other.
A timing belt (hereinafter referred to as a belt) 14 is hung on 2 and the belt 14 is connected to a motor M via a pulley P3 at the other end. Therefore, the rotation of the motor M drives the belt 14 to drive the feed rollers via the pulleys P1 and P2 and the bevel gears G1 to G4.
2a ₁ and 2a ₂ rotate. The printing paper 1a is conveyed by this rotation.

The upper support bar 9b has one end rotatably supported by fulcrums 10c and 10d and the other end rotatably supported by support shafts 11c and 11d supported by the apparatus frame 70b.
c, 12d are attached, and pressing rollers 3a ₁ , 3a ₂ are attached to the side surfaces of the arms 12c, 12d. Feed roller 2a ₁ , 2a
₂ and the pressing rollers 3a ₁ and 3a ₂ are in rolling contact with each other.

Therefore, the movement of the moving bar 9 in the direction of arrow E causes the arms 12a and 12b to rotate about the support shafts 11a and 11b, and the arms 12c and 12d to rotate about the support shafts 11c and 11d. The feed rollers 2a ₁ and 2a ₂ and the press rollers 3a ₁ and 3a ₂ rotate in the arrow G direction to change their directions.

Further, the feed rollers 2a ₁ and 2a ₂ and the pressing roller 3a
Predetermined position between ₁ , 3a ₂ and stacker 4a, for example, feed roller
A sensor S1 that detects the leading edge of the printing paper 1a is provided at a position approximately 20 mm from the 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ .

The block diagram of FIG. 3 shows only those related to the present invention.
The B) 15 is provided with a mode instruction button 16a that is operated when the offset stacking mode in which the sent printing paper 1a is shifted and stacked is designated.

The timer 17a is started when the sensor S1 detects the leading edge of the printing paper 1a and the PM8a is excited, and counts a predetermined time (for example, 0.5 seconds) T set in the time setting unit 17b. Further, 18 is a sensor amplifier, 19 is a motor driver, and 20 is a magnet driver.

The control unit 21 includes a CPU and a control program, and the CPU follows the control program to select a mode instruction button.
According to the presence or absence of the instruction of 16a, in the normal stacking or offset stacking mode, the printing paper 1a is stacked on the stacker 4a (corresponding to the stacking unit 4 of claim 1) described in the conventional examples (1) and (2). Control each part.

Since it has such a structure and function, its operation will be described below with reference to the explanatory view of FIG. 4 and the flow chart of FIG. First, in the normal state, the feed rollers 2a ₁ and 2a ₂ and the press roller 3a are
_As shown in FIG. 4 (a), ₁ and 3a ₂ are positioned parallel to the conveying direction of the printing paper 1a, and if the printed printing paper 1a is sent out as it is, it is accumulated at a certain position of the stacker 4a. Therefore, when performing offset integration, the mode instruction button 16a of the KB15 is used.
Press to specify the offset accumulation mode.

The printed printing paper 1a is conveyed, nipped by the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ , and advances, and the front end is detected by the sensor S1. Then, the magnet driver is controlled by the control unit 21.
20 is commanded to excite the PM 8a, and the moving bar 9 moves in the direction of arrow E as shown in FIG.
_{The directions of 1} , 2a ₂ and the pressing rollers 3a ₁ , 3a ₂ rotate in the direction of arrow G by a predetermined angle, for example, 30 degrees.

At the same time, the timer 17a is activated. The printing paper 1a consists of a feed roller 2a whose direction is changed by a predetermined angle.
_{With 1} , 2a ₂ and the pressing rollers 3a ₁ , 3a ₂ , it is sent diagonally forward without changing its posture, as shown by the chain double-dashed line in FIG. 4 (b).

When the timer 17a counts a predetermined time T, the excitation of the PM 8a is released and the moving bar 9a moves in the direction of the arrow F, and the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a.
The direction of ₂ returns to the original direction. Then, the printing paper 1a is sent to the front as it is and accumulated at the shifted position on the stacker 4a. Therefore, the shift amount can be adjusted by changing the predetermined time T.

In this way, the printing paper which is continuously printed and sent while the offset accumulation mode continues.
The flow of ~ is repeated for 1a. Another embodiment is shown in the block diagrams and flowcharts of FIGS. 6 and 7. The different embodiment is different from the above embodiment, in place of the method of returning the orientations of the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ after a predetermined time by the timer 17a,
This is a method of returning when the rear end of the printing paper 1a is detected at a predetermined position.

That is, in FIG. 6, the sensor S2 is provided at a position immediately after the feed rollers 2a ₁ and 2a ₂ and the press rollers 3a ₁ and 3a ₂ , and the rear end of the printing paper 1a is the feed rollers 2a ₁ and 2a. It is detected that the position ₂ and the pressing rollers 3a ₁ and 3a ₂ have passed.
Reference numeral 18a indicates a sensor amplifier, and 21a indicates a control unit.

With this structure, the operation will be described with reference to the explanatory view of FIG. 4 and the flowchart of FIG. First, as shown in FIG. 4 (a), when the feed rollers 2a ₁ and 2a ₂ and the press rollers 3a ₁ and 3a ₂ are normally positioned in parallel with the conveying direction of the printing paper 1a, the printing is completed as it is. Paper 1a
Is sent out, the stacker 4a is accumulated at a fixed position. Therefore, when performing offset integration, the mode instruction button of KB15
Press 16a to specify the offset accumulation mode.

The printed printing paper 1a is conveyed, nipped by the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ , and advances, and the front end is detected by the sensor S1. Then, PM8a is excited by the control of the control unit 21a, and as shown in FIG. 4 (b), the directions of the feed rollers 2a ₁ and 2a ₂ and the press rollers 3a ₁ and 3a ₂ are in the direction of arrow G, for example, 30 degrees. Rotate.

The printing paper 1a is slanted forward without changing its posture by the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ whose directions are changed by a predetermined angle, and is indicated by a chain double-dashed line in FIG. 4 (b). Sent as shown. The printing paper 1a is sent diagonally forward as it is and is accumulated at a shifted position on the stacker 4a.

When the sensor S2 detects the trailing edge of the printing paper 1a, the excitation of the PM 8a is released and the moving bar 9a moves in the direction of the arrow F, and the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a.
The direction of ₂ returns to the original direction.

In this way, the printing paper which is continuously printed and sent while the offset accumulation mode continues.
The flow of ~ is repeated for 1a. In this case, it is necessary to increase the width of the stacker 4a, but it is possible to increase the offset of the offset printing paper 1a.

In this way, offset integration can be performed by changing the directions of the feed rollers 2a ₁ and 2a ₂ and the press rollers 3a ₁ and 3a ₂ , and the mechanism is simple and the cost can be improved. Can be obtained.

In each of the above examples, when the leading edge of the printing paper 1a is detected by the sensor S1, the feed rollers 2a ₁ and 2a ₂
Although the case where the direction of the pressing rollers 3a ₁ and 3a ₂ is changed has been described, the position of the leading end of the printing paper 1a may be detected by another method, for example, the printing paper 1a is fed from a paper feeding unit (not shown). Is set as the transport time, the time from when the paper is sent out is counted, and when the set time is reached, the feed rollers 2a ₁ and 2a
₂ and the method of changing the direction of the presser rollers 3a ₁ and 3a ₂ , or by providing a sensor a predetermined distance before the stacker 4a between the paper feeding section and the stacker 4a, and after the sensor detects the leading edge of the printing paper 1a. A method of changing the directions of the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ after a predetermined time has passed may be used.

In the above embodiment, the case where the direction of the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ is returned to the original direction after a short predetermined time has been described. set the time until the end passes the feed rollers 2a _1, 2a ₂ and the pressing roller 3a _1, 3a _2, roller 2a ₁ sends a print sheet 1a is delivered, 2a ₂ and the pressing roller 3a _1, 3a By adopting the method of returning the direction of ₂ to the original, a method of stacking with the same deviation of the printing paper 1a as in the above different embodiments may be adopted.

Further, in the above-mentioned different embodiment, after the trailing edge of the printing paper 1a has passed the feed rollers 2a ₁ and 2a ₂ and the pressing rollers 3a ₁ and 3a ₂ , that is, the printing paper 1a is fed and then the feed roller is fed.
2a _1, 2a ₂ and a case has been described of a method to restore the orientation of the pressing roller 3a _1, 3a _2, roller 2a ₁ sends the position of the sensor S2,
2a ₂ and the presser rollers 3a ₁ and 3a ₂ are placed in front of the
By returning the orientations of the feed rollers 2a ₁ and 2a ₂ and the press rollers 3a ₁ and 3a ₂ to the original direction before the printing paper 1a is delivered,
It is also possible to adopt a method of stacking the printing papers 1a with the same displacement as in the above embodiment.

[0040]

As described above, according to the present invention, the instruction means for instructing the stacking section to shift the position of the medium and stacking the medium, and the direction of the feed roller are changed by a predetermined angle with respect to the medium feeding direction. And a direction changing unit for changing the direction of the feed roller that is feeding the medium by a predetermined angle when the medium is offset and gathered by the instructing unit. There is an effect that a low cost medium feeding mechanism can be obtained with a simple mechanism.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a control block diagram of the embodiment.

FIG. 4 is an explanatory diagram of an example.

FIG. 5 is a flowchart of an embodiment.

FIG. 6 is a block diagram showing a different embodiment.

FIG. 7 is a flowchart of a different embodiment.

FIG. 8 is a perspective view showing a conventional example (1).

FIG. 9 is a perspective view showing a conventional example (2).

[Explanation of symbols]

1 is a medium, 1a is a printing paper, 2,3,2a, 2a ₁ and 2a ₂ are feed rollers, 3a, 3a ₁ and 3a ₂ are holding rollers, 4 is a stacking unit, and 4a
Is a stacker, 8 is a direction changing means, 8a is PM, 9
Is a moving bar, 16 is an indicating means, 16a is a mode instruction button,

Claims (1)

[Claims] 1. A medium feeding mechanism for holding a fed medium (1) by at least a pair of vertically opposed feed rollers (2, 3) and feeding it, and accumulating it in an accumulating section (4). Instructing means (16) for instructing to stack the medium (1) by shifting the position of the medium (1) in the stacking section (4), and the direction of the feeding rollers (2, 3) is set to the feeding direction of the medium (1). Direction changing means (8) for changing a predetermined angle with respect to the feed roller (8) which is feeding the medium (1) by the direction changing means (8) when instructed by the indicating means (16). 2,
A medium feeding mechanism characterized in that the direction of 3) is changed by a predetermined angle.