JP2635843B2 - Printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing device.

[0002]

2. Description of the Related Art Conventionally, a printing apparatus which can automatically adjust a gap between a platen and a print head in accordance with the thickness of paper and has a paper stopper for cueing the paper. It has been known.

FIGS. 4 and 5 show a schematic configuration of such a printing apparatus. In these figures, reference numeral 1 denotes an apparatus main body as a stationary body. The apparatus main body 1 is provided with a platen 3, first and second rotating rollers 4, 24, a movable frame 10, a carrier 20, a print head 21, a paper stopper 50, an interlock lever 60, and the like (in FIG. 4, The illustration of the rotary rollers 4, 24, the paper stopper 50, etc. is omitted.)

Here, the platen 3 and the first rotating roller 4 are arranged along the paper transport path 2 of the apparatus main body 1 as shown in FIG. The first rotating roller 4 is rotated in a direction indicated by an arrow via a drive motor (not shown).

The movable frames 10, 10 are disposed opposite to each other in the longitudinal direction of the platen 3 (in the direction perpendicular to the plane of FIG. 5), and each movable frame 10 is opened via a support shaft 11 (see FIG. 1). It is provided so as to be rotatable in an arrow R direction) and a closing direction (arrow Q direction). A carrier 20 is provided between the movable frames 10 and 10 by a guide member (first member).
It is provided movably in the longitudinal direction of the platen 3 via a carrier shaft 22, a second carrier shaft 23) and the like. The first carrier shaft 22 has both ends supported by the frames 10 and 10, and the second carrier shaft 23 is attached to the stationary body (apparatus main body 1).

[0006] The carrier 20 includes a print head 21.
Are mounted so as to face the platen 3. Further, on the movable frame 10 side, a second rotating roller 24 is rotatably supported so as to be able to contact and separate from the first rotating roller 4 on the apparatus main body 1 side.

The paper stopper 50 is a means for cueing the paper, and is rotatably supported on a stationary body (apparatus main body 1) side via a fixed shaft 52 as shown in FIG. A locking portion 51 is formed at the leading end of the paper stopper 50. The paper stopper 50 is urged clockwise by a spring or the like (not shown).
When the movable frame 10 shown in FIG. 5 is closed, it is positioned at the standby position shown in FIG.

Further, the interlocking lever 60 is means for operating the paper stopper 50 in conjunction with the rotation of the movable frame 10 to cause the locking portion 51 of the stopper 50 to open and close the paper transport path 2. Specifically, the interlocking lever 60
As shown in FIG. 5, the movable body 10 is rotatably supported on a stationary body (apparatus main body 1) side via a fixed shaft 61, and the left end in the figure is rotatable with respect to the movable frame 10 via a shaft 62. Are linked. Further, an engagement portion 63 is formed at the right end of the interlocking lever 60 in the drawing.

In order to set the paper P at a predetermined position on the paper transport path 2 in the above-described printing apparatus, first, the movable frame 10 is rotated about the support shaft 11 in the opening direction (the direction of arrow R). And the first and second rotating rollers
(4, 24) is separated and the space between the platen 3 and the print head 21 is widened. Then, the link lever 60
In conjunction with the movable frame 10, the paper stopper 50 rotates clockwise about the fixed shaft 61, and the paper stopper 50 is pushed by the engaging portion 63 of the interlock lever 60 and rotates counterclockwise about the fixed shaft 52. Then, the paper transport path 2 is closed by the locking portion 51 of the paper stopper 50. Next, in this state, the sheet P is inserted between the platen 3 and the print head 21 and between the first rotating roller 4 and the second rotating roller 24 until the leading end of the sheet P abuts on the locking portion 51 of the sheet stopper 50.

In this manner, when the head of the paper P is caught using the paper stopper 50, the movable frame 10 is rotated in the closing direction (the direction of arrow Q) and the second rotating roller 24 is moved through the paper P to the first position. When the paper stopper 50 is pressed against the rotation roller 4 , the paper stopper 50 rotates clockwise in accordance with the amount of rotation of the movable frame 10, and the locking portion 51 is retracted to a standby position above the paper transport path 2. Also, the print head 21
The first and second rotating rollers 4, 24 and the like automatically position the head 21 and the platen 3 at a position where the gap between the head 21 and the platen 3 has an optimum value according to the thickness of the paper P.

[0011]

By the way, in the above-described printing apparatus, after the paper P is caught using the paper stopper 50 and the movable frame 10 is rotated in the opening direction (R direction), the paper stopper is stopped. The locking portion 51 also rotates in conjunction with it, and the locking portion 51 is retracted from the paper transport path 2. At this time, the locking portion 51 moves in an arc around the fixed shaft 52 as shown in FIG. The sheet P is pushed back in the direction opposite to the sheet conveying direction (the direction of the arrow X). Here, since the sheet push-back amount changes according to the amount of rotation of the movable frame 10 (therefore, the sheet thickness of the sheet P) and the like, the set positions of the sheets P having different sheet thicknesses and the like are different, and the sheet P is accurately set. The paper P cannot be set at a predetermined position.

In view of the above circumstances, an object of the present invention is to provide a simple
It is an object of the present invention to provide a printing apparatus that can accurately set a sheet at a predetermined position and perform appropriate printing even if the sheet thickness of the sheet varies.

[0013]

According to the present invention, there is provided a platen and a first rotating roller disposed along a paper transport path of a stationary body, and a rotating mechanism for rotating the stationary body in an opening direction and a closing direction around a support shaft. A movable frame movably provided, a carrier movably provided in the movable frame in a longitudinal direction of the platen via a guide member, and a print head mounted on the carrier so as to face the platen. , When the movable frame is turned in the closing direction,
When it comes into contact with the rotating roller and is turned in the opening direction,
A second rotating roller provided on the movable frame so as to be separated from the first rotating roller , wherein the stationary member is disposed downstream of the first and second rotating rollers in the sheet conveying direction. A paper stopper means having a locking portion capable of moving in a direction perpendicular to the paper transport path and opening and closing the paper transport path, and using the opening direction rotating power when the movable frame is rotated in the open direction. Then, the paper stopper means is operated so that the locking portion is moved in a direction to close the paper transport path, and when the paper stopper is turned in the closing direction,
Interlocking means for operating the locking portion to be moved in a direction to open the sheet conveying path using the closing direction rotating power ;
Is provided.

[0014]

According to the present invention, when the movable frame is rotated in the opening direction when the paper is set at a predetermined position on the paper transport path, the paper stopper is operated by the interlocking means, and
The locking portion closes the paper transport path. Then in that state,
The sheet is inserted between the platen and the print head and between the first and second rotating rollers until the leading end of the sheet comes into contact with the locking portion of the sheet stopper means.

In this way, when the head of the paper is caught by the paper stopper means and the movable frame is rotated in the closing direction to press the second rotating roller against the paper, the locking portion of the paper stopper means is interlocked. The sheet is moved in a direction to open the sheet conveying path by means.

At this time, since the locking portion of the paper stopper moves in the direction perpendicular to the paper transport path, the paper is not pushed back in the direction opposite to the insertion direction. Further, the print head is automatically positioned by the first and second rotary rollers or the like at a position where the gap between the head and the platen has an optimum value according to the thickness of the paper.

Thus, even if the paper thickness is different, the paper can be accurately set at a predetermined position and can be properly printed. Note that the locking part of the paper stopper
The paper transport path using the rotating power of the
Therefore, there is no need to provide a dedicated drive source, simplifying the configuration
Is done.

[0018]

An embodiment of the present invention will be described with reference to the drawings.
The printing apparatus according to the present embodiment can automatically adjust the gap between the platen and the print head according to the paper thickness of the paper, and can accurately position the paper at a predetermined position using paper stopper means. It is formed so that it can be set and printed properly. Specifically, as shown in FIGS. 1 to 3, the present printing apparatus includes a stationary body (apparatus main body 1), a platen 3, first and second rotating rollers 4 and 24, a movable frame 10, a carrier 20, a print head 21 and a paper stopper means 30 and an interlocking means 40 which are characteristic parts of the apparatus. The same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be omitted or simplified.

Here, the paper stopper means 30 is a means for performing cueing of the paper. Specifically, the paper stopper means 30 is disposed downstream of the first and second rotating rollers 4 and 24 in the paper transport direction (X direction), and is perpendicular to the paper transport path 2 of the stationary body (the apparatus main body 1). And a locking portion (33) capable of opening and closing the paper transport path 2 by moving the paper transport path 2.

In this embodiment, the paper stopper means 3
Numeral 0 includes a sheet stopper 31 and a shaft 32 as shown in FIGS. Paper stopper 31
Are provided between the movable frames 10, 10.
More specifically, each paper stopper 31 rotates on a vertical plane orthogonal to the paper transport path 2 via a shaft 32 on a fixed frame 35 provided in the apparatus main body 1 between the movable frames 10, 10. It is provided as possible. At one end of the paper stopper 31, a locking portion 33 is formed so as to protrude in a direction perpendicular to the paper transport direction (X direction).
Further, a locking portion 34 is formed at the other end of the paper stopper 31 so as to protrude in the paper transport direction (X direction).

The interlocking means 40 is connected to the movable frame 10.
The open direction when but which is rotated in the opening direction (arrow R direction)
The paper stopper means 30 is locked by the locking portion (3
3) is operated so as to be moved in the direction to close the sheet conveying path 2 and when the sheet conveying path 2 is turned in the closing direction (the direction of arrow Q), the locking portion (33) is used by using the turning force in the closing direction. ) Is a means for operating so as to be moved in a direction to open the paper transport path 2.

In this embodiment, the interlocking means 40 includes an engagement shaft 41 and a spring 42.
The engagement shaft 41 is attached to the movable frames 10, 10 such that the engagement shaft 34 comes into contact with the engagement portion 34 of the paper stopper 31 when the frame 10 is closed. Also, the spring 42
Is connected to the paper stopper 31 and is formed so as to press the engaging portion 34 of the stopper 31 against the engaging shaft 41 by its elastic force.

Next, the operation of this embodiment will be described.
When the movable frame 10 is rotated in the opening direction (R direction) when the paper P is set at a predetermined position on the paper transport path 2, the engagement shaft 41 of the interlocking means 40 is moved upward in conjunction with the rotation. Then, the paper stopper 31 is rotated following the engagement shaft 41 by its own weight and the elastic force of the spring 42, and the locking portion 33 is positioned at the position shown by the two-dot chain line in FIG. 2 is closed.

Next, in this state, the sheet P is moved along the sheet transport path 2 between the platen 3 and the print head 21 and between the first and second rotating rollers until the leading end of the sheet P abuts on the locking portion 33 of the sheet stopper 31. Insert between 4,24.

In this manner, when the head of the paper P is caught using the paper stopper 31, the movable frame 10 is rotated in the closing direction (Q direction), and the second rotating roller 24 is moved to the paper P.
, The engaging portion 33 of the paper stopper 31 is moved by the interlocking means 40 in a direction to open the paper transport path 2.

At this time, the locking portion 33 of the paper stopper 31
Is rotated (moved) in the direction perpendicular to the sheet transport path 2, so that the sheet P is not pushed back in the direction opposite to the insertion direction (X direction). Further, the print head 21 is provided with the first and second print heads.
The rotary rollers 4, 24 and the like automatically position the head 21 and the platen 3 at a position where the gap between the head 21 and the platen 3 has an optimum value according to the thickness of the paper P.

According to this embodiment, however, the first and second rotating rollers 4 and 24 feed the sheet in the sheet conveying direction (X direction).
A sheet stopper means 30 disposed downstream and having a locking portion (33) capable of moving in a direction perpendicular to the sheet conveyance path 2 of the stationary body (apparatus main body 1) to open and close the sheet conveyance path 2; When the sheet 10 is turned in the opening direction (the direction of arrow R), the locking portion (33) of the sheet stopper means 30 is moved in the direction of closing the sheet conveying path 2 by using the turning force of the opening direction. the locking unit utilizing the closed direction rotational force if it is rotated to the actuated allowed and closing direction (arrow Q direction) to (3
Since 3) has a structure provided with an interlocking means 40 for actuating so as to be moved in a direction to open the sheet conveying path 2, easy
With a simple configuration, even if the paper P has a different thickness, the paper P can be accurately set at a predetermined position to perform proper printing.

In the above embodiment, the interlocking means 40
Is constituted by the engagement shaft 41 and the spring 42, but the spring 42 may be omitted by directly connecting the engagement shaft 41 and the engagement portion 34 of the paper stopper 31.

Although the paper stopper means 30 is composed of two paper stoppers 31 and the like, the number of paper stoppers 31 to be installed is not limited to this and can be arbitrarily selected.

[0030]

According to the present invention, a member disposed downstream of the first and second rotating rollers in the sheet conveying direction and movable in a direction perpendicular to the sheet conveying path of the stationary body to open and close the sheet conveying path. A sheet stopper means having a stop portion, and a direction in which the locking portion closes the sheet conveying path by using the paper stopper means when the movable frame is rotated in the opening direction. Interlocking means which is operated so as to be moved in the closing direction and is operated so as to be moved in a direction to open the sheet conveying path by utilizing the turning force in the closing direction when it is turned in the closing direction. Therefore, even if the thickness of the paper is different, the paper can be accurately set at a predetermined position and appropriate printing can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a diagram for explaining an opening and closing operation of a sheet stopper unit according to one embodiment.

FIG. 3 is a diagram for explaining a positional relationship between a paper stopper unit and an interlocking unit;

FIG. 4 is a diagram illustrating an overall configuration of a conventional printing apparatus.

FIG. 5 is a diagram illustrating a sheet setting operation of a conventional printing apparatus.

FIG. 6 is a diagram for explaining a problem that occurs in a conventional printing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Apparatus main body (stationary body) 2 Paper conveyance path 3 Platen 4 1st rotation roller 10 Movable frame 11 Support shaft 20 Carrier 21 Print head 22 1st carrier shaft (guide member) 23 2nd carrier shaft (guide member) 24 2nd Rotary roller 30 Paper stopper means 33 Locking section 40 Interlocking means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kouhide Kimura 570, Ohito, Oni-cho, Tagata-gun, Shizuoka Prefecture Inside the Tokyo Electric Company, Ltd. (72) Enobu Makino 6-78, Minamicho, Mishima-shi, Shizuoka Tokyo Electric Inside the Mishima Plant, Ltd. (72) Kimio Nakamura, Inventor 6-78, Minamimachi, Mishima-shi, Shizuoka Tokyo Electric Co., Ltd. Inside the Mishima Plant, 72-72 Nobutaka Tokuhama 6-78, Minamicho, Mishima-shi, Shizuoka Tokyo Electric Co., Ltd. (72) Inventor Masakazu Tanaka 6-78, Minamimachi, Mishima-shi, Shizuoka Prefecture Tokyo Electric Co., Ltd. Mishima Plant (56) References Real Opening Sho 61-86349 (JP, U)

Claims (1)

(57) [Claims] 1. A platen and a first rotating roller disposed along a paper transport path of a stationary body, and a movable frame provided on the stationary body so as to be rotatable in an opening direction and a closing direction about a support shaft. When a carrier which is movable in the longitudinal direction of the platen through the guide member to the movable frame, and the mounted printing head to the platen and facing the carrier, wherein the movable frame is in the closing direction
When rotated, it comes into contact with the first rotating roller and opens.
When it is rotated in the direction, it is separated from the first rotating roller
And a second rotating roller provided on the movable frame so as to be disposed downstream of the first and second rotating rollers in the paper transport direction and perpendicular to the paper transport path of the stationary body. a sheet stopper means having an openable locking portion the sheet conveying path by moving the, the open side when the movable frame is rotated in the opening direction
The sheet stopper means is operated by using the turning force so that the locking portion is moved in the direction to close the sheet conveyance path, and when the sheet is rotated in the closing direction, the turning force in the closing direction is used.
Use to print apparatus characterized by the locking portion is provided, and interlocking means for operating so as to move in a direction to open the sheet conveying path.