JPH0692484A - Printer - Google Patents

Abstract

(57) [Abstract] [Purpose] Preventing sheets set by being inserted into an automatic sheet feeder from entering above the separating claws and enabling accurate sheet feeding operation to be obtained with a simple mechanism. . It also makes it easier to set paper. [Structure] Stacker unit 20 capable of setting a plurality of sheets
A swinging member that has a hopper 30 that is disposed inside to bias the sheet upward, a separation claw 41 that is located above the leading edge of the sheet, and a hopper push-down portion 42 that swings around a shaft portion 43. 40, and an operation lever 60 that also has an operating portion 61 that can push down the push-down portion 42 side and a regulating portion 63 for the number of sheets to be inserted and that is rotatably supported by the shaft portion 23b and that also functions as a discharge tray. Set up. The swing member is provided with a holding portion 45a that holds the turning position of the operation lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer having a built-in automatic paper feeder. In particular, the present invention relates to the improvement of the automatic paper feeder.

[0002]

2. Description of the Related Art Conventionally, as a printer having a built-in automatic paper feeding device, a printer described in JP-A-63-74825 is known.

The printer is shown in FIGS. In this printer, when the paper discharge support 1 is rotated in the arrow direction, the intermediate lever 3 is rotated by the rotation of the operation arm 2 thereof, and the engagement lever 4 is rotated by the rotation of the intermediate lever 3. The pressure plate operating lever 6 is rotated via the lever shaft 5 by the rotation of the coupling lever 4, and the pressure plate member 7 is moved downward by the rotation of the pressure plate operating lever 6 so that the sheet is placed between the pressure plate member 7 and the separation claw 8. The sheet P can be stored in the feeding holder 9 by inserting the sheet P.

[0004]

In the conventional printer described above, when the discharge support 1 is rotated, the pressure plate member 7 moves downward, but the separation claw 8 does not move. Therefore, when a large number of sheets are inserted, There is a possibility that the leading edge of the upper sheet may enter above the separation claw 8 and an accurate sheet feeding operation may not be obtained.

There is also a problem that the intermediate lever 3 and the engaging lever 4 are required, and the mechanism is complicated.

A first object of the present invention is to solve the above problems and prevent a sheet inserted and set in an automatic sheet feeder from entering above a separating claw to perform an accurate sheet feeding operation. It is to provide a printer that can obtain a printer with a simple mechanism.

A second object is to make it easier to set paper.

[0008]

In order to achieve the first object, a printer according to a first aspect of the present invention is a printer in which a plurality of sheets of paper can be set, and a stacker arranged in the stacker to raise the sheets upward. It has a biasing hopper, a separation claw located above the tip corner of the sheet, and a push-down part of the hopper, and is swingably supported about an axis between the separation claw and the push-down part. A swinging member, and an operating lever rotatably supported above the stacker unit and having an operating portion capable of pushing down the push-down portion side of the swinging member. .

In order to more reliably achieve the first object, the printer according to a second aspect is the printer according to the first aspect, in which the operating lever is rotated to swing the operating member. It is characterized in that the operation lever is provided with a regulating portion for regulating the number of sheets to be inserted and set in the stacker portion when the sheet is swung.

Further, a printer according to a third aspect is the printer according to the first or second aspect, wherein the operation lever also serves as a paper discharge tray.

In order to achieve the second object, the printer according to a fourth aspect is the printer according to the first aspect, the second aspect, or the third aspect, in which the operating lever is rotated and a swing member is provided in the operating portion. The swinging member is formed with a holding portion that engages with the operating portion and holds the turning position of the operation lever when swinging.

[0012]

In the printer according to the first aspect of the present invention, when the operation lever is rotated, the operating portion pushes down the pushing-down portion side of the swinging member. The swinging member has a separating claw and a pushing-down portion of the hopper, and is swingably supported around an axis between the separating claw and the pushing-down portion. When pushed down, the push-down portion moves downward to push down the hopper and the separating claw moves upward.

As described above, according to the printer of the first aspect, when the operation lever is rotated, the hopper is pushed down and the separating claw moves upward, so that the sheets set in the stacker section are located above the separating claw. It is possible to prevent the sheet from entering and to obtain an accurate sheet feeding operation. Further, the mechanism for pushing down the hopper and moving the separating claw upward can be obtained as a simple mechanism including the swing member and the operation lever.

Further, according to the printer of the second aspect, when the operation lever is rotated, the restriction portion causes
Since the number of sheets to be inserted and set in the stacker section is regulated, it is possible to more reliably prevent the sheets from entering above the separation claw.

According to the printer of the third aspect,
Since the operation lever also serves as the paper discharge tray, the number of parts can be further reduced.

According to the printer of the fourth aspect, when the operation lever is rotated to swing the swing member in the operating portion,
Since the holding portion of the swinging member is engaged with the operating portion to hold the turning position of the operation lever, it is easy to insert the sheet.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a printer according to the present invention, FIG. 2 is a plan view, FIG. 3 is a left sectional view, and FIG. 4 is an enlarged sectional view of a main part.

In FIGS. 3 and 4, reference numeral 10 denotes an automatic paper feeder, which includes a stacker unit 20, a hopper 30, a pair of swing members 40 and 50 (only 40 is shown), and an operation lever 60 which also serves as a paper discharge tray. And a paper feed roller 70.

As shown in FIGS. 5 and 6, the stacker unit 20 includes a bottom portion 21 of the lower case of the printer and a bottom portion 2 of the lower case.
Aligning the leading edges 22 and 2 of the sheet formed upright integrally with 1.
2, a right side presser 23 for the sheet, which is also integrally formed upright with the bottom 21, and a left side presser 25 for the sheet, which is fixed to the bottom 21 with screws 24. A plan view of the left side presser 25 is shown in FIG. 7A, a front view thereof is shown in FIG.
A sectional view taken along line c-c in FIG. The left-side presser 25 is not formed integrally with the case because the left-side presser 25 can be changed in its mounting position or the left-side presser 25 itself can be replaced according to the size of the sheet.

As shown in FIG. 5, the right side presser 23 has a paper loop presser 23a and a support shaft 23 for the swinging member 40.
and b are integrally formed. Also, the left side holder 2
As shown in FIG. 7, the loop presser 25a and the support shaft 25b of the swinging member 50 are integrally formed on the member 5.

The hopper 30 is formed by punching an iron plate, and as shown in FIGS. 4 and 6, the insertion portions 31, 3 into the support holes 26 formed in the bottom portion 21 of the case.
1 and receiving portions 32, 32 for the swinging member are formed. The hopper 30 is rotatably attached in the stacker section 20 by inserting the insertion section 31 into the support hole 26 at the bottom of the case. As shown in FIGS. 5 and 6, a tongue piece 26 a for elastically supporting the insertion portion 31 is formed integrally with the bottom portion 21 in the support hole 26. A compression spring 33 is provided between the bottom portion 21 and the hopper 30, and the hopper 30 is biased toward the paper feed roller 70 by the action of the compression spring 33.

As shown in FIGS. 4, 6 and 8, the swinging member 40 has a separating claw 41 located above the leading edge corner Pd of the sheet (see FIG. 6) and a pushing-down section 42 of the hopper. Then, the bearing portion 43 formed between the separation claw 41 and the push-down portion 42 is attached to the support shaft 23b formed on the right side presser 23, and the support shaft 23b
It is supported swingably around. In FIG. 8, reference numeral 44 denotes a tongue piece, which serves as a stopper for preventing the bearing portion 43 from coming off the support shaft 23b after the bearing portion 43 is fitted into the support shaft 23b.

The swing member 40 includes an operation lever 6 which will be described later.
0 is formed with a receiving portion 45 that comes into contact with the operating portion 61. When the operating lever 60 is rotated (see FIG. 10), the receiving portion 45 engages with the operating portion 61 of the operating lever. A holding portion 45a for holding the turning position of the operation lever
Are formed.

The swinging member 50 is constructed substantially symmetrically with the swinging member 40 as shown in FIG. That is, 51
Is a separating claw, 52 is a push-down portion, 53 is a bearing portion,
The bearing portion 53 is attached to the support shaft 25b formed on the left side retainer 25 described above. Further, 55 is a receiving portion, and 55a is a holding portion.

As shown in FIGS. 4 and 6, the swinging members 40 and 50 have tension springs 46 and 5 provided between them and the case.
6, respectively, are urged counterclockwise in FIG.

The operating lever 60 is, as shown in FIGS. 4, 6 and 9, a push-down portion 4 of the rocking members 40, 50.
It has actuating parts 61, 61 capable of pushing down the 2, 52 side downward, and is rotatably supported above the stacker part 20. In FIG. 9, reference numerals 62 and 62 denote bearing portions, and as shown in FIGS. 5 and 6, by fitting the bearing portions 62 and 62 to the shafts 27 and 27 formed integrally with the lower case, they can be rotated. It is supported. Also, FIG.
In FIG. 11, reference numeral 63 is a restriction portion, and as shown in FIG.
When 0 and 50 are swung, the number of sheets of paper P that are inserted and set in the stacker unit 20 is regulated.

As shown in FIGS. 1, 4 and 6, only one short paper feed roller 70 is supported at the center by a shaft 71, and is rotationally driven through the shaft 71 by a drive system (not shown). It

Next, the operation will be described. Since the swinging member 50 moves in the same manner as the swinging member 40, the description of the operation of the swinging member 50 will be omitted unless otherwise necessary.

When setting the paper, the operation lever 60 is rotated as shown in FIG. Then, the operating portion 61 of the operating lever 60 is moved to the receiving portion 45 of the swinging member 40.
Abut and push it down. When the receiving portion 45 is pushed down, the pushing-down portion 42 moves downward and comes into contact with the receiving portion 32 of the hopper 30, and pushes down the hopper 30 against the spring force of the compression spring 33. At the same time, the swing member 4
The rotation of 0 causes the separation claw 41 to move upward. Operating lever 6
When the rotation of the operating portion 61 of 0 reaches the holding portion 45a of the swing member, the operating portion 61 is engaged with the holding portion 45a and the turning position of the operation lever 60 is held at the position shown in the figure.

Then, as shown in FIG. 11, when a stack of sheets P is inserted into the stacker section 20, the excess sheet group P3 is
The leading end of the sheet hits the regulating section 63 of the operation lever 60, and the insertion is regulated, so that only the proper number of sheet group P4 is inserted into the stacker section 20.

After that, when the excess paper group P3 is removed and the operation lever 60 is returned to its original position, as shown in FIG.
The pressing by the pushing-down portion 42 of the swinging member is released, the hopper 30 is moved upward by the force of the compression spring, and the sheet is pressed against the sheet feeding roller 70, and the swinging member 40 is also returned to the original position and the separating claw 41 is provided. Is located above the leading edge of the paper,
Bias the paper downwards.

When the printer operates in such a state (see FIG. 3), the paper P is fed one by one to the automatic paper feed path 80 by the operation of the paper feed roller 70 and the separation claw 41, and the paper feed roller 80 is fed. When 70 is rotating, a paper feed roller 81 and a gate roller 82 that rotate in a direction opposite to the paper feed direction.
The leading end of the sheet feeding roller is pressed between the sheet feeding roller and the sheet feeding roller 70 to rotate around the sheet feeding roller 70 (in the direction of arrow X in FIG. 6) to remove the skew, and then the sheet feeding roller 81 that rotates in the sheet feeding direction is wound. Then, it reaches the printing portion 84 via the pinch roller 83. The printing unit 84 is formed between the inkjet head 86 attached to the carriage 85 that reciprocates in the direction orthogonal to the paper surface in FIG. 3 and the upper surface of the intermediate frame 87. The sheet printed by the printing unit 84 passes through the transport unit 88 and the discharge unit 89 and is discharged onto the operation lever 60 that functions as a discharge tray. The ejected paper sheet is shown as P1.

As described above, according to the printer of this embodiment, when the operation lever 60 is rotated, the hopper 3 is rotated.
Since 0 is pushed down and the separation claw 41 moves upward, the paper P set in the stacker unit 20 is separated by the separation claw 41.
It is possible to prevent the sheet from entering above and to obtain an accurate sheet feeding operation. Further, the mechanism that pushes down the hopper 30 and moves the separating claw 41 upward can be obtained as a simple mechanism including the swinging member 40 and the operating lever 60.

Further, when the operation lever 60 is rotated,
Since the regulation unit 63 regulates the number of sheets to be inserted and set in the stacker unit 20, it is possible to more reliably prevent the sheets P from entering above the separation claw 41.

Further, since the operation lever 60 also serves as the paper discharge tray, the number of parts can be further reduced.

Further, when the operating lever 60 is rotated to swing the swinging member 40 at the operating portion 61, the holding portion 45a of the swinging member 40 engages with the operating portion 61 so that the operating lever 60 moves. Since the rotation position is held, it is easy to insert paper.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist of the present invention.

[0039]

As described above, according to the present invention, it is possible to prevent a sheet inserted and set in the automatic sheet feeder from entering above the separating claw and to obtain an accurate sheet feeding operation with a simple mechanism. Further, it becomes easy to set the paper.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a printer according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a left side sectional view of the same.

FIG. 4 is an enlarged cross-sectional view of the same main part.

FIG. 5 is a plan view of the lower case.

FIG. 6 is an enlarged plan view of an essential part of the same.

FIG. 7 is a view showing a left side retainer in the above embodiment,
(A) is a plan view, (b) is a front view, and (c) is a sectional view taken along line cc in FIG.

8A and 8B are views showing one of the rocking members in the same embodiment, where FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. 8C is a bottom view.

FIG. 9 is a view showing the operating lever in the above embodiment,
(A) is an aa cross section in (b) figure, (b) is a top view, (c) is a left side view.

FIG. 10 is an operation explanatory view.

FIG. 11 is an operation explanatory view.

FIG. 12 is a perspective view of a conventional printer.

FIG. 13 is an explanatory diagram of a conventional printer.

FIG. 14 is an explanatory diagram of a conventional printer.

[Explanation of symbols]

 P Paper 10 Automatic Paper Feeder 20 Stacker 23b Support Shaft 30 Hopper 40 Swinging Member 41 Separation Claw 42 Pushing Down 43 Bearings 45a Holding 50 Swinging 60 Operating Lever 61 Actuating 63 Regulation

Claims (4)

[Claims] 1. A stacker unit capable of setting a plurality of sheets, a hopper disposed in the stacker unit for urging the sheets upward, a separation claw located above a tip corner of the sheet, and the hopper. A swing member having a push-down portion and swingably supported about an axis between the separation claw and the push-down portion, and an operation capable of pushing down the push-down portion side of the swing member. And a control lever rotatably supported above the stacker unit. 2. A control unit for controlling the number of sheets inserted and set in the stacker unit when the operating lever is swung to swing the swinging member in the actuating unit. The printer according to claim 1, wherein the printer is provided. 3. The printer according to claim 1, wherein the operation lever also serves as a paper discharge tray. 4. A holding portion for holding the turning position of the operating lever by engaging with the operating portion when the operating lever is turned to swing the swinging member in the operating portion. The printer according to claim 1, wherein the printer is formed on a moving member.