JP2628686B2 - Printer with paper cutting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention has a paper cutting mechanism for automatically cutting a roll paper or the like incorporated in a printing device to an arbitrary length. The present invention relates to a printer that can drive an operation of a sheet cutting mechanism by a common driving device.

<Prior Art> Conventionally, as a printer with a paper cutting mechanism of this type, a method of driving a paper cutting mechanism by an independent power source has been adopted. For example, JP-A-60-214982 uses a disc-shaped paper cutter connected to a pair of gears.In this case, an electromagnetic coil is separately provided as a power source for moving the cutter to the paper side when cutting the paper. An example is shown. Also,
Japanese Utility Model Laid-Open Publication No. 62-85434 discloses an embodiment in which a rotary cutter unit is separately provided as a paper cutting mechanism.

<Problems to be Solved by the Invention> However, in such a conventional printer with a paper cutting mechanism, an independent motor or electromagnet is separately used for the paper cutting mechanism. This increases the number of circuit components and the like, and eventually increases the size of the entire printer device.

In the case of a rotary cutter that has been conventionally used as a paper cutting mechanism, a member corresponding to a movable blade must be cut from a round bar into a semicircular cross section, resulting in a reduction in manufacturing costs due to the cutting process. This increases the cost of the entire printer apparatus.

The printer with a paper cutting mechanism according to the present invention has been made by focusing on the conventional problems as described above, and it is desirable to provide a printer with a paper cutting mechanism capable of reducing the size and cost of the entire apparatus. Is what you do.

<Means for Solving the Problems> A printer with a paper cutting mechanism according to the present invention includes a driving motor, an intermediate gear connected to a rotating shaft of the motor, a driving gear meshing with the intermediate gear, and one end connected to a supporting shaft of the driving gear. A switching arm rotatably supported on a switching shaft, a supporting shaft connected to the other end of the switching arm, and meshing with a driving gear, and a predetermined portion when rotating between the switching arm and the switching arm via friction means. A planetary gear that causes friction, a sheet feed gear provided adjacent to one side of the planetary gear, a paper feed roller connected to the sheet feeder gear, and a paper feeder provided adjacent to the other side of the planetary gear. A paper cutting gear, and a paper cutting means comprising a fixed blade and a movable blade, wherein the movable blade is connected to the paper cutting gear via a crank arm, and when the motor is rotated in the forward direction, the planetary gears become frictional means. The switching arm is swung toward the paper feed line gear by the frictional force of the gear and meshes with the paper feed line gear, thereby rotating the paper feed roller and feeding the paper, while turning the motor in the opposite direction. When rotated, the planetary gears receive the frictional force of the friction means and mesh with the paper cutting gear while swinging the switching arm toward the paper cutting gear, so that the movable blade operates to cut the paper. Has become.

<Operation> The switching arm swings between the sheet feed gear and the sheet cutting gear according to the forward / reverse rotation of one motor.
The planetary gears supported by the switching arm selectively mesh with the sheet feed gear or the sheet cutting gear according to the rotation direction of the motor. Therefore, by simply changing the rotation direction of one motor, both the paper feed mechanism driving and the paper cutting mechanism driving can be selectively performed, and the size and cost of the entire apparatus can be reduced.

<Embodiment> A preferred embodiment of the present invention will be described below with reference to the drawings.

1 is a motor as a power source, and 2 is a rotating gear which is one of intermediate gears attached to the rotating shaft.
The rotational force of the rotary gear 2 is transmitted to the drive gear 4 via the gear 3 which is one of the intermediate gears. A switching arm 6 is pivotally supported on the support shaft 5 of the drive gear 4, and another support shaft 7 is provided on the other side of the switching arm 6. A planet gear 8 is supported on the support shaft 7 in a state of being engaged with the drive gear 4. A curved O-ring 9 as friction means is interposed on the support shaft 7 between the planetary gear 8 and the switching arm 6 to apply a constant frictional force between the switching arm 6 and the planetary gear 8. By doing
The frictional force is transmitted to the drive gear 4 so that the switching arm 6 stops at an arbitrary angle with respect to the support shaft 5 of the drive gear 4.

The gear 10 and the line feed gear 11 are gears that are engaged with each other and serve as a “sheet line feed gear”. Also, idle gear 12, gear
13, "Paper cutting gear" with cutter gear 14 engaged with each other
Gear. The planetary gear 8 is located between the gear 10 serving as the “paper feed line gear” and the idle gear 12 serving as the “paper cutting gear”, and selectively meshes with the gear 10 and the idle gear 12. It is designed to reciprocate between the two in accordance with the swing of the switching arm 6.

A platen 15 is provided integrally with the line feed gear 11 as the "paper line feed gear", and a pressure roller 16 pressed against the platen 15 rotates. Rolled paper 17 is a paper guide shaft 18
Is fed in the line feed direction while being pinched between the platen 15 and the pressure roller 16. The printer head 19 can print on the sent paper 17. In addition, when the paper 17 is line-feeded, the motor 1 rotates only by an angle corresponding to the line-feed, but when the paper is completely fed and the leading portion of the next paper is introduced, a certain position ( The rotation angle of the motor 1 is controlled by detecting a mark printed on the front end) by the sensor 20 and transmitting a signal detected by the sensor 20 to a drive control circuit of the motor 1.

A pin 21 is set up on the cutter gear 14 serving as the “paper cutting gear”, and a crank arm 22 that reciprocates according to the rotation of the cutter gear 14 is attached to the pin 21. A movable blade 24 urged in a direction to open by a spring 23 is attached to the crank arm 22, and the movable blade 24 and the fixed blade 25 can cut the paper 17 at a cutter position 26. . Therefore, the rotation amount of the motor 1 when cutting the paper 17 is a rotation amount corresponding to one rotation of the cutter gear 14.

Hereinafter, the operation of the sheet feed mechanism and the operation of the sheet cutting mechanism of this apparatus will be described.

Operation of Paper Feeding Mechanism (See FIGS. 1 and 2) First, the motor 1 is rotated in the normal rotation direction A. Then, the gear 3, the driving gear 4, and the planetary gear 8, which are engaged with each other, rotate in the respective directions, so that the switching arm 6 swings upward by a constant frictional force applied to the planetary gear 8. The planetary gear 8 and the gear 10 are engaged with each other. Then, when the line feed gear 11 engaged with the gear 10 rotates, the platen 15 and the pressure roller 16 respectively pinch and rotate the sheet 17 to feed the sheet 17 in the line feed direction.

Operation of Paper Cutting Mechanism (See FIGS. 3 and 4) Next, the motor 1 is rotated in the reverse rotation direction B. Then, the gear 3, the driving gear 4, and the planetary gear 8, which are engaged with each other,
Are rotated in the direction of ←, respectively, in the opposite direction from the previous direction, so that the constant frictional force applied to the planetary gear 8 causes
Swings downward, meshing the planetary gear 8 with the idle gear 12. Then, the gear 13 and the cutter gear 14 engaged with each other with the idle gear 12 rotate, so that the crank arm 22 is pulled to the right side in the drawing by the rotation of the cutter gear 14, and the movable blade 24 moves to the fixed blade 25 side. To cut the paper 17 at the cutter position 26.

<Effect> Since the printer with the paper cutting mechanism according to the present invention has the contents as described above, the paper feed mechanism operation and the paper cutting mechanism operation can be selectively performed only by switching the rotation direction of one power source. It can be carried out. Therefore, the size and cost of the entire printer can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an operation of a sheet feed-back mechanism of a printer with a sheet cutting mechanism according to an embodiment of the present invention. FIG. 2 is a plan view seen from the direction of arrow II in FIG. FIG. 4 is a side view corresponding to FIG. 1 showing a mechanism operation, FIG. 4 is a plan view seen from the direction of arrow IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along line VV in FIG. . DESCRIPTION OF SYMBOLS 1 ... Motor 4 ... Driving gear 6 ... Switching arm 8 ... Planetary gear 9 ... Bending O-ring (friction means) 10 ... Gear [Paper line feed gear] 11 ... Line feed gear [Paper line feed gear] 12 …… Idle gear [Gear for cutting paper] 13 …… Gear [Gear for cutting paper] 14 …… Cutter gear [Gear for cutting paper] 17 …… Paper 22 …… Crank arm 24 …… Movable blade 25 …… Fixed blade A …… Forward direction B …… Reverse direction

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kaname Kanno 4-3 Jonai, Hanamaki City, Iwate Prefecture Inside Shinko Seisakusho Co., Ltd. (56) References JP-A-62-94874 (JP, A) JP, U)

Claims (1)

(57) [Claims] 1. A driving motor, a driving gear that rotates by receiving a rotational force of the driving motor, a switching arm having one end rotatably supported on a supporting shaft of the driving gear, and the other end of the switching arm. A planetary gear, which is supported by a support shaft connected to the portion and meshes with a drive gear, and which generates a predetermined friction when rotating between the switching arm and a switching arm via a friction means; The paper feed gear connected to the paper feed line gear, the paper feed roller connected to the paper feed line gear, the paper cutting gear provided adjacent to the other side of the planetary gear, and the movable blade composed of a fixed blade and a movable blade When the motor is rotated in the forward direction, the planetary gear receives the frictional force of the frictional means and swings the switching arm toward the paper feed line gear. For line feed When the motor is rotated in the opposite direction, the planetary gears receive the frictional force of the frictional means and cause the switching arm to rotate the paper cutting gears. The gear is engaged with the sheet cutting gear while swinging to the side, whereby the sheet cutting gear is rotated, and the crank arm causes the movable blade to perform a cutting operation with the rotation, thereby cutting the sheet. A printer with a paper cutting mechanism.