JPH0416181Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a recording device in which a recording sheet is transferred by a roller and a recording member such as a pen writes on the recording sheet, and in particular, This invention relates to a sheet width detection mechanism that can easily detect the width of the sheet.

[Technical background and conventional technology]

FIG. 1 is a perspective view schematically showing a conventional X-Y recording type pen-type recording device.

In this type of pen-type recording device, a recording sheet 1 is held between feed rollers 2a, 2b and presser rollers 3a, 3b and transported back and forth in the Y direction, and a pen 4 facing the recording sheet 1 is moved in the X direction. It is starting to be sent. Then, put pen 4 on recording sheet 1.
The pen 4 is designed to draw characters, symbols, figures, etc. on the recording sheet 1 by controlling the movement in the X-Y directions while the pen 4 is in pressure contact with the recording sheet 1.

[Problems with conventional technology]

However, in this pen-type recording device, the recording range of the pen 4 must be regulated by some means in accordance with the size of the recording sheet 1 to be loaded. That is, if the recording distance with the pen 4 is longer than the size of the loaded recording sheet 1, the pen 4 will come off the recording sheet 1 and write blankly on the table.
There is a risk of staining the table or damaging the pen tip.

In order to prevent such malfunctions, it is necessary to input the size of the recording sheet 1 to the control circuit. This input can also be made by operating buttons, but if the operation buttons are provided, the area of the operation panel etc. will become larger and the device will become larger. In addition, in the case of button input, the operation becomes complicated and there is a risk that the size of the recording sheet 1 may be inputted incorrectly.

[Purpose of the present invention] The present invention was made by focusing on the above-mentioned conventional problems, and provides a recording method that prevents blank writing by the recording member by making it possible to easily input the size of the recording sheet to be loaded. The purpose is to provide a sheet width detection mechanism for the device.

[Structure of the present invention]

The present invention provides a recording apparatus that is equipped with a feed roller driven by a motor and a presser roller that presses a recording sheet against the feed roller, and in which a recording member is disposed opposite to the recording sheet. A roller holder for moving the presser roller in accordance with the width of the recording sheet is provided, and a movement position detection device configured between the roller holder and a fixed portion is provided, and the recording sheet is At the time of loading, the sheet width information can be automatically input simply by moving the presser roller according to the sheet width.

[Example of the present invention]

Embodiments of the present invention will be described below with reference to FIG. 2 and the following drawings.

Figure 2 is an exploded perspective view showing the main parts of an X-Y recording type pen-type recording device as an example of a recording device;
The figure is a sectional view showing the assembled state, and FIG. 4 is a perspective view showing the position detection device of the roller holder.
This figure shows the state viewed from the direction of the arrow in the figure.

Reference numeral 11 in the figure is a table. The table 11 is made of sheet metal and is bent into a U-shaped cross section. A right side plate 12 and a left side plate 13 are attached to both ends of the table 11. That is, the pair of protrusions 11a on the right end of the table 11 are fitted into the square holes 12a of the right side plate 12, and the pair of protrusions 11b on the left end of the table 11 are fitted into the square holes 12a of the right side plate 12.
is fitted into the square groove 13a of the left side plate 13, and each member of the table 11, right side plate 12, and left side plate 13 is positioned.

(Structure of pen drive mechanism) Above the table 11 are a support shaft 14 and a switching shaft 1.
5 are installed in parallel. The right end of the support shaft 14 is supported in a hole 12b formed in the right side plate 12, and the left end is supported in a hole 13b formed in the left side plate 13. The switching shaft 15 is supported by a hole 12c formed below the hole 12b and a hole 13c formed below the hole 13b. A guide lever 16 is attached to the support shaft 14. Holes 16a are bored in the bent portions at both ends of the guide lever 16, and these holes 16a are rotatably supported by the support shaft 14. A spring 17 is provided at the left end of the guide lever 16 in the drawing.
The force of this spring 17 urges the guide lever 16 to rotate in one direction about the support shaft 14 . Further, a drive pin 18 is provided at the right end of the guide lever 16 in the figure, and this drive pin 18 is provided to protrude outward from the right side plate 12 and is connected to a drive mechanism (not shown) using a cam or solenoid. It's linked. When the drive pin 18 is pressed in the direction of repulsion by the spring 17 by this drive mechanism, the guide lever 16 rotates and operates a hammer 28, which will be described later, so that the pen 4 comes into contact with the recording sheet 1. ing.

A carriage 21 is provided in front of the guide lever 16. The support shaft 14 is inserted through a support hole 21a formed in the back of the carriage 21. Further, a roller 22 is provided on the back side of the carriage 21, and this roller 22 is in contact with the front side of the guide lever 16. The carriage 21 is movable in the X direction along the support shaft 14, and at this time, the roller 22 moves against the guide lever 1.
It is designed to roll on the front side of 6. Further, wires 23 are connected to both sides of the carriage 21. This wire 23 has a closed loop shape, and its right side in the figure is hung around a drive pulley 24.
The left side in the figure is hung on an idle pulley (not shown). The driving pulley 24 is driven by a stepping motor (not shown), and by this driving force, the carriage 21 is pulled by the wire 23 and can reciprocate in the X direction.

A support plate 25 is fixed to the lower part of the carriage 21, and a pen holder 26 is rotatably provided between the support plate 25 and the carriage 21. This pen holder 26 supports four pens 4. Further, a gear 26a is integrally formed at the bottom of the pen holder 26. On the other hand, a worm 27 is held at the bottom of the carriage 21. This worm 27 is inserted through the switching shaft 15, and is meshed with the gear 26a. In addition, the switching shaft 15
has an oval cross section, and the right end of this switching shaft protrudes outward from the right side plate 12, and a gear is fixed to the tip. Rotational force from a drive mechanism (not shown) is transmitted to this gear, and the switching shaft 1
When the worm 5 rotates, the worm 27 rotates, and the pen holder 26 that meshes with the worm 27 rotates, so that a predetermined one of the pens 4 is selected.
Note that when the carriage 21 moves in the X direction, the worm 27 is held by the carriage 21 and slides on the switching shaft 15. Furthermore, a pair of sheet pressers 25a are provided protruding from the tip of the support plate 25. During the recording operation, this sheet presser foot 25a slides on the recording sheet 1,
The recording sheet 1 is designed to prevent wrinkles from occurring.

Further, a hammer 28 is provided on the upper part of the carriage 21. This hammer 28 is opposed to one of the four pens 4. and,
When the guide lever 16 rotates about the support shaft 14, the hammer 28 is driven by the guide lever 16, the pen 4 is pushed by the hammer 28, and the pen tip is pressed into contact with the recording sheet 1 on the table 11. I'm starting to do that.

(Configuration of Sheet Transfer Mechanism and Sheet Width Detection Mechanism) A drive shaft 31 is provided at the front of the right side plate 12 and the left side plate 13.
has been set up. The drive shaft 31 has an oval cross section. The right end of the drive shaft 31 in the drawing projects outward from the right side plate 12, and a gear 32 is fixed to the tip thereof. A stepping motor 33 is installed on the inner surface of the right side plate 12, and a driving gear 34 provided on the stepping motor 33 meshes with the gear 32. Drive shaft 3
A fixed-side feed roller 35 is provided on the left side of FIG. This feed roller 35 is connected to the drive shaft 31
is fixed. Further, a moving side feed roller 36 is provided on the right side of the drive shaft 31 in the drawing.
This movable feed roller 36 is integrally provided with a holding roller 36a. Roller portions 36b of the fixed side feed roller 35 and the moving side feed roller 36
Both surfaces are made of an elastic material such as rubber. Furthermore, the diameter of the holding roller 36a is smaller than that of the roller portion 36b. A shaft hole with an oval cross section is formed in the feed roller 36 on the moving side, and the drive shaft 31 is inserted through this shaft hole so that the feed roller 36 can slide on the drive shaft 31. . The drive shaft 31 is located on the lower surface of the table 11, the fixed side feed roller 35 projects upward from the notch A at the left end of the table 11 in the figure, and the movable side feed roller 36 projects from the right end of the table 11. It protrudes upward from the elongated hole B formed across the center (the third
(see figure). The feed roller 36 is movable within the length of the elongated hole B.

A presser shaft 37 is installed above the drive shaft 31. The presser shaft 37 is provided parallel to the drive shaft 31 with the table 11 in between. A presser roller 38 is provided on the left side of the presser shaft 37 in the drawing, and a presser roller 39 is provided on the right side in the drawing. Both presser rollers 38 and 39 are externally mounted so as to be freely rotatable with respect to the presser shaft 37. Left side board 1
A fixed roller holder 41 is fixed to the inner surface of the roller 3 with screws or the like. This roller holder 4
A groove is formed in the lower surface of 1, and a spring 42 is housed in this groove. Further, a roller presser 43 is provided below the roller holder 41. A pin 43a is integrally provided on the upper surface of this roller presser 43, and this pin 43a is connected to the spring 4.
2, and this pin 43a projects upward from a hole 41a formed in the roller holder 41. The lower part of the roller holder 43 is the presser roller 3
The presser shaft 37 is held in a state in which 8 is sandwiched therebetween. Then, due to the elastic force of the spring 42, the presser shaft 37
is urged downward, and the presser roller 38 is pressed against the feed roller 35.

On the other hand, a movable roller holder 51 is provided in the elongated hole B portion of the table 11. As shown in FIG. 3, the lower half of the roller holder 51 is located below the table 11, and the upper half is located above the table 11, and is movable along the elongated hole B. It is being A holding groove 51a is formed in the lower half of the roller holder 51, and this
A holding roller 36a that is integral with the feed roller 36 is held. Furthermore, an angular holder portion 51b is formed in the upper half of the roller holder 51. This holder portion 51b is the fixed side roller holder 4.
It has almost the same structure as No. 1, with a groove formed in its lower part and a hole 51c formed in its upper surface.
A spring 42 is installed inside the groove, and a pin 43a on the upper surface of the roller presser 43 is inserted into the spring 42 and protrudes outward from the hole 51c.
This roller presser 43 presses the presser shaft 37 with the right feed roller 39 in between, and the presser roller 39
is pressed against the roller portion 36b of the feed roller 36 under the force of the spring 42. Furthermore, an operating section 51d is formed in the front of the upper half of the roller holder 51.

Further, a contact plate 52 is fixed to the front surface of the lower half of the roller holder 51. This contact plate 52 is
One ground contact 52a and two detection contacts 52
It is branched into 52b and 52c. On the other hand, a detection plate 53 is fixed to the inner surface of the front plate 11c of the table 11. As shown in FIG. 4, a plurality of conductive patterns 54a, 54b, 54c, 54d, and 54e are formed on the inner surface 53a of the detection plate 53. As shown in FIG. Among these conductive patterns, 54a is a ground pattern, and the other conductive patterns 54b to 54e are detection patterns. The roller holder 5
A ground contact 52a of the contact plate 52 provided at 1 is in sliding contact with the ground pattern 54a. Furthermore, the detection patterns 54b to 54e are
The detection contacts 52b and 52c are formed so as to be located alternately on the sliding line. When the detection contacts 52b and 52c slide on the detection plate 53,
Depending on the sliding position, the detection contacts 52b, 52c
selectively comes into contact with any one of the detection patterns 54b to 54e.

In this embodiment, the contact plate 52 and the detection plate 53 are
A position detection device for the roller holder 51 is constructed by the above.

Next, the operation of the pen-type recording device having the above configuration will be explained.

(Recording Sheet Loading Operation and Sheet Width Setting Operation) As the recording sheet 1, cut paper or roll paper is used. This recording sheet 1 is loaded onto the table 11 from the right side or the left side as shown in FIG. At this time, the distance between the feed rollers 35 and 36 and the presser rollers 38 and 39 is set to match the size of the recording sheet 1. In this operation, the roller holder 51 is moved in the elongated hole B in the X direction by holding the operating portion 51d of the roller holder 51 on the movable side. At this time, the holding groove 51 provided in the roller holder 51
a holds the holding roller 36a and moves the feed roller 36 along the drive shaft 31. At the same time, the roller presser 43 supported by the roller holder 51 moves the presser roller 39 together with the feed roller 36. Then, the feed roller 3 on the fixed side
The position of the roller holder 51 is determined in such a state that the left end of the recording sheet 1 is held between the roller 5 and the presser roller 38, and the right end of the recording sheet 1 is held between the moving side feed roller 36 and the presser roller 39.

When moving the roller holder 51 in this way, the contact plate 5 fixed to the roller holder 51
The second ground contact 52a always slides on the ground pattern 54a of the detection plate 53, and the detection contacts 52b and 52c slide on the inner surface 53a of the detection plate 53. When the detection contacts 52b, 52c come into sliding contact with any of the detection patterns 54b to 45e, the detection pattern and the ground pattern 54a are electrically connected via the detection plate 52.
The installation position of the roller holder 51, that is, the loaded recording sheet 1, is determined by a control circuit (not shown) which of the detection patterns 54b to 54e is electrically connected to the ground pattern 54a. It is now possible to detect the size of For example, in FIG. 4, each contact 52a, 5
2b, 52c are located at α, the upper detection contact 52b is in contact with the detection pattern 54b, and the ground pattern 5 is connected via the contact plate 52.
4a and the detection pattern 54b are electrically connected. When these two patterns are electrically connected, it is detected that the roller holder 51 is farthest from the fixed feed roller 35, and it is identified that the loaded recording sheet 1 is, for example, A4 size. be done. Further, the roller holder 51 is connected to the table 11.
Move to the inside of the contacts 52a, 52b, 52c
When reaches the β position in FIG. 4, the upper detection contact 52b comes into contact with the second detection pattern 54c. At this time, the detection pattern 54c is electrically connected to the ground pattern 54a, and it is detected that the roller holder 51 is located inside the previous position. At this time, it is identified that the loaded recording sheet 1 is, for example, B5 size. When the roller holder 51 is moved further inside the table 11 than the position β, the above detection pattern 5 is formed.
4c is broken, and this time, the lower detection contact 52c comes into contact with the third detection pattern 54d. When the roller holder 51 is further moved inside the table 11, the detection contact 52c comes into contact with the fourth detection pattern 54e. This identifies whether the loaded recording sheet 1 is A5 size or B6 size.

When loading the recording sheet 1 onto the table 11 as described above, the carriage 21 is moved in the X direction and positioned at the end of the table 11. After loading recording sheet 1, cartridge 2
1 onto recording sheet 1. As shown in FIG. 3, at this time, the sheet presser 25a of the support plate 25 fixed at the bottom of the carriage 21 comes into light contact with the recording sheet 1.

(Recording Operation) In the recording operation, first, the driving pulley 24 is rotated by a stepping motor (not shown), and the carriage 21 is moved in the X direction by being pulled by the wire 23. At the same time, the stepping motor 33 rotates the drive shaft 31, and each feed roller 35 and 36
is rotated to reciprocate the recording sheet 1 in the Y direction. Then, the guide lever 16 is rotated by a drive mechanism (not shown), thereby operating the hammer 28 on the carriage 21 to bring one of the pens 4 into contact with the recording sheet 1. As a result, on recording sheet 1, characters corresponding to the X-Y movement,
Symbols or figures are written with a pen. In addition,
When switching the pen 4 to change the recording color, the switching shaft 1 is moved by a motor (not shown) or the like.
Rotate 5. As a result, the worm 27 held in the carriage 21 rotates, and the gear 26
The pen holder 26 rotates together with a, and the recording pen 4 is switched.

During this recording operation, since the size of the loaded recording sheet 1 is identified by the position of the roller holder 51 as described above, the recording operation can be performed according to this size. For example, if the control circuit is provided with a scissoring function according to the size of the recording sheet 1, when the recording range of the pen 4 exceeds the size of the recording sheet 1,
When the pen 4 comes off the recording sheet 1, the pen tip can be separated from the recording sheet 1. At this time, the pen 4 begins to draw imaginary characters in the air, and the pen 4 does not draw on the table 11.

Furthermore, if automatic carriage return is set in the text mode, line breaks can be automatically performed according to the size of the recording sheet 1. Therefore, when writing characters, simply by loading the recording sheet 1 and determining the position of the roller holder 51, the size of the recording sheet 1 is automatically recognized, and automatic line breaks can be made according to the size. Become.

(Modified Example) In the illustrated embodiment, the contact plate 52 and the detection plate 53 are used as a device for detecting the amount of movement of the roller holder 51. However, as other detection means, the roller holder 51
The position of the roller holder 51 may be detected by interposing an optical detection means between the roller holder 51 and the table 11, or by interposing a variable resistor or the like. Further, the feed rollers 35 and 36 are integrated and long, and only the presser roller 39 that comes into pressure contact with the feed rollers 35 and 36 is attached to the roller holder 5.
It may be moved by 1.

Furthermore, the present invention is not limited to the table-type pen-type recording device as shown in the figure, but can also be implemented in various types of printers using a rotating platen. In this case, the platen functions as a feed roller, and the presser roller that is in pressure contact with the platen is moved by a roller holder, and the amount of movement of this roller holder is detected.

[Effects of this invention]

As described above, according to the present invention, the following effects can be achieved.

(1) By moving the roller holder, the roller interval can be matched to the width of the recording sheet, and a position detection device is installed to detect the position of this roller holder, so the position of this roller holder can be set. This means that the size of the loaded recording sheet can be detected. Therefore, even if the recording range exceeds the size of the recording sheet, malfunctions such as blank writing of the recording member on the table or platen can be prevented. Therefore, damage to the recording member and staining of the platen etc. can be prevented.

(2) The size of the recording sheet is automatically entered, so if you set auto carriage return in text mode, line breaks can be automatically made to fit the recording sheet. Documents can now be recorded in an orderly manner without having to enter the size.

(3) The size of the recording sheet can be entered by simply aligning the roller holder with the width of the recording sheet, eliminating the need to input the recording sheet size by operating buttons, etc., which saves time and effort. . Further, since an input operation mechanism for inputting the size of the recording sheet is no longer necessary, the recording apparatus itself can be made smaller.

(4) If the roller holder position detection device is configured by a detection plate having a conductive pattern and a contact fixed to the roller holder as described in claim (2), it will have a simple structure and low cost. It can be implemented at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the outline of the configuration of a conventional pen-type recording device, Fig. 2 and the following show embodiments of the present invention, and Fig. 2 is an exploded perspective view showing the main parts of the pen-type recording device. Figure 3 is a sectional view showing the sheet width detection mechanism of the pen-type recording device, and Figure 4 shows the configuration of the roller holder position detection device.
FIG. 3 is a perspective view seen from the direction of the arrow in FIG. 2; 1... Recording sheet, 4... Pen, 11... Table, 21... Carriage, 26... Pen holder, 31... Drive shaft, 35... Fixed side feed roller, 36... Moving side feed roller, 36a... Holding roller, 37... Presser shaft, 38... Fixed side presser roller, 39... Moving side presser roller, 42...
... Spring, 43 ... Roller holder, 51 ... Roller holder, 51a ... Holding groove, 52 ... Contact plate, 52
a...Ground contact, 52b, 52c...Detection contact, 53...Detection plate, 54a...Ground pattern, 54b to 54e...Detection pattern, 52,5
3...Roller holder position detection device.

Claims (1)

[Claims for Utility Model Registration] (1) A device is provided with a feed roller driven by a motor and a presser roller that presses the recording sheet against the feed roller, and a recording member is disposed opposite to the recording sheet. In the recording device that is
A recording apparatus characterized in that a roller holder for moving the presser roller according to the recording sheet width is provided, and a roller holder movement position detection device is provided between the roller holder and a fixed part. Seat width detection mechanism. (2) The roller holder movement position detection device includes a detection plate having a conductive pattern provided on the fixed part,
A sheet width detection mechanism for a recording apparatus according to claim (1), which is a utility model, and comprises a contact that is fixed to a roller holder and slides on the conductive pattern.