JP3463611B2 - Auto cutter device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic cutter device, and more particularly to an automatic cutter device capable of extending the life of the cutter.

[0002]

2. Description of the Related Art In a conventional auto-cutter device, the drive of a motor is not transmitted to a round blade by sliding a wire around a drum around which the wire is wound. Since it slides with the wire attached,
Both the drums are worn, and the sharpness of the cutter blade is reduced,
Also, the life of the autocutter is due to the life of the wire and drum because the wire breaks before the motor fails or the cutting operation becomes defective due to the decrease in the wire tension due to the smaller drum diameter. .

[0003]

As described above, in the conventional auto cutter, the diameter of the drum is reduced, the wire is deteriorated, and the life of the wire and the drum is shortened. There was a problem that the life was shortened.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic cutter device capable of extending the cutter life in order to solve the above problems.

[0005]

In order to achieve the above object, the automatic cutter device of the present invention has a cutter cutting sheet movement (forward rotation) and a cutter return movement to the original position by forward and reverse rotations of a motor. in automatic cutting device for performing (reverse), provided with a slip clutch which is provided in the drive transmission of the motor, slip
The center part of the clutch is cylindrical and the motor
The clutch gear that meshes with the tag gear and the clutch gear
Slip clutch spring wrapped around the end
And the bending and raising of the end of the slip clutch spring
It is equipped with a drum that is set in the cutout part, and the slip clutch can perform normal rotation and reverse rotation of the motor for a fixed time without using a sensor, and the cutting operation can be performed without transmitting the drive of the motor. To do.

Further, a base frame serving as a base, a plate-like fixed blade arranged in parallel in the sheet conveying direction and fixed to the base frame, and a holder rotatably held to determine a cutting start position by a sensor. With a round blade, the round blade contacts a part of the edge against the plate-shaped fixed blade, and while rotating, slides at a right angle to the paper conveyance direction to cut the paper and bend it at the bent part of the base frame. It is preferable that the abutment prevents the round blade from moving at a predetermined position.

[0007]

Still further, it is preferable to include a wire wound around the drum.

[0009] Further, the wire has a holder fixed thereto, is oscillatably supported by a pin passing through a base frame, and is rotatably held by a pin passing through an arm plate biased outward by a spring. It is preferable that the four corners are stretched by three pulleys that are rotatably held by a pin that passes through the base frame.

Further, the rotation of the motor when the round blade moves in the paper cutting direction is defined as normal rotation, in which the slip clutch rotates in one direction and the slip clutch spring winds in the other direction. preferable.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are cross-sectional views showing the configuration and operation of an embodiment of an auto-cutter device according to the present invention. FIG. 1 is a diagram showing a normal rotation, and FIG. 2 is a diagram showing a reverse rotation. The auto cutter device is arranged in parallel in the sheet conveying direction, is rotatably held by a plate-shaped fixed blade 2 and a holder 3 fixed to a base frame 1, and has a cutting start position A determined by a sensor 4. A part of the fixed blade 2 is in contact with the fixed blade 2, and while rotating, it slides at a right angle in the sheet conveying direction, cuts the sheet, and hits the bent portion of the base frame 1 so that the round blade 5 moves to the position B (see FIG. 2). ) Will not be able to move. next,
One pulley 8 and a base frame in which the holder 3 is fixed, is oscillatably supported by the pin passing through the base frame 1, and is rotatably held by the pin passing through the arm plate 7 biased outward by the spring 6. With the three pulleys 9, 10, 11 rotatably held by the pin passed through 1,
It is composed of a slip clutch 14 around which a wire 12 having a corner is wound and which transmits the drive of a motor 13. The motor 13 and the slip clutch 14 are connected by a motor gear.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 3 is a perspective view showing the structure of the slip clutch in the embodiment of the auto cutter device of the present invention. In the slip clutch 14 according to the present embodiment, the center portion of the clutch gear 14a meshing with the motor gear 15 has a cylindrical shape, and the slip clutch spring 14b is fitted around the cylinder portion so that the end portion of the slip clutch spring 14b is bent and bent. It is set in the cutout portion of the drum 14c around which the wire 12 is wound. Fig. 4 shows the start of the normal rotation of the motor.
FIG. 6 is a cross-sectional view illustrating the operation of the slip clutch while the circular blade is stopped.
Fig. 5 shows the slip clutch between the stop of the round blade and the stop of the motor.
FIG. 6 is a cross-sectional view illustrating the operation of FIG.

FIG . 1 shows the rotation direction of the slip clutch in the operation of the embodiment of the present invention (when the motor is rotating normally ).
When the motor 5 moves in the paper cutting direction (direction a in FIG. 1), the rotation direction of the motor 13 is forward rotation. At this time, the slip clutch 14 rotates in the x direction and the winding direction of the slip clutch spring 14b. Is the y-direction winding.

FIG . 2 shows the rotation direction of the slip clutch during the operation of the embodiment of the present invention (when the motor rotates in the reverse direction) . The motor 13 reverses at the end of the forward rotation time, and the slip clutch 14 moves in the y direction. It rotates, the round blade 5 moves in the b direction, the reverse rotation of the motor 13 is completed by the detection of the sensor 4, and the round blade 5 stops.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIG. 1, the round blade 5 moves to a cutting start position A where the sensor 4 is turned on when the printer is powered on. In the cutting operation, when the motor 13 rotates in the normal direction, the clutch gears 14a, which constitute the slip clutch 14,
Slip clutch spring 14b, a drum 14c is integrally rotated in the x-direction, then, as shown in FIG. 2, circles
The blade 5 slides in the direction a to the position B where the paper cutting is finished and the base frame 1 is bent.

FIG. 6 is a diagram showing the relationship between the movement of the round blade and the normal rotation of the motor. The normal rotation of the motor 13 is not ended by a sensor, a switch, or the like, but is controlled so as to be normally rotated for a certain period of time. This time is made longer by adding a margin time in consideration of the load applied to the paper cutting to the time when the circular blade 5 starts moving and stops when the base frame 1 is bent.
Therefore, when the movement of the circular blade 5 is stopped, the motor 13
The forward rotation drive is transmitted to the motor gear 15 and the clutch gear 14a, and the slip clutch spring 14b tries to rotate in the x direction. However, since the wire 12 is stopped from being conveyed by the stop of the round blade 5 , the wire 12 is wound. By stopping the rotation of the attached drum 14c, the drum 14c
Since a force in the G direction acts on the bent and raised portion of the slide spring 14b set in the cutout portion, the slip clutch spring 14b is opened and the engagement of the clutch gear 14a with the center cylinder portion is alleviated. Becomes idle. Due to this idling, the normal rotation drive of the motor 13 is not transmitted.

[0020] Thereafter, the motor 13 is reversed with the end forward rotation time, the slip clutch 14 is rotated in the y-direction, round blade
5 moves in the b direction, and the motor 13 is detected by the sensor 4.
The reversal of is finished and the round blade 5 is stopped.

[0021]

As described above, in the auto cutter device of the present invention, when the round blade hits the bending of the base frame and the movement stops and the motor rotates in the margin area, the motor is driven by the slip clutch. Drive is not transmitted to the round blade, so the wire and drum are not worn.

Therefore, the wire and the drum, which are the factors that determine the life of the autocutter, can be eliminated, so that the life of the autocutter can be extended.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the configuration and operation (normal rotation) of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration and operation (reverse rotation) of the embodiment of the present invention.

FIG. 3 is a perspective view showing a structure of a slip clutch according to an embodiment of the present invention.

[Fig. 4] Sliding clutch between the start of the normal rotation of the motor and the stop of the round blade
FIG. 6 is a cross-sectional view illustrating the operation of FIG.

[Fig. 5] Movement of the slip clutch between the stop of the round blade and the stop of the motor
It is sectional drawing explaining a work.

FIG. 6 is a diagram showing a relationship between movement of a round blade and normal rotation of a motor according to the present invention.

[Explanation of symbols]

1 Base Frame 2 Fixed Blade 3 Holder 4 Sensor 5 Round Blade 6 Spring 7 Arm Plates 8, 9, 10, 11 Pulley 12 Wire 13 Motor 14 Sliding Clutch 14a Clutch Gear 14b Sliding Clutch Spring 14c Drum 15 Motor Gear

Claims (5)

(57) [Claims] 1. An auto-cutter device for moving a cutter to cut a paper sheet (forward rotation) and returning the cutter to its original position (reverse rotation) by forward and reverse rotations of a motor, which is provided in a drive transmission portion of the motor. A slip clutch is provided, and the slip clutch has a center portion formed in a tubular shape.
The clutch gear that meshes with the motor gear of the motor and the clutch
Slip around the center of the gear
Of the clutch spring and the slip clutch spring
Dora with the bent end of the end set in the notch
And a beam, by the slip clutch, without a sensor, fixed forward time of the motor, performing the reverse, automatic cutting device which is characterized in that the cutting operation without transmitting the driving of the motor. 2. A base frame serving as a base, a plate-shaped fixed blade which is arranged in parallel in the sheet conveying direction and fixed to the base frame, and a holder rotatably held to determine a cutting start position by a sensor. A round blade, the round blade contacts a part of the edge with the plate-shaped fixed blade, and while rotating, slides at a right angle to the paper transport direction to cut the paper, The automatic cutter device according to claim 1, wherein the round blade cannot move at a predetermined position by coming into contact with a bent portion of the frame. 3. The autocutter device according to claim 2 , further comprising a wire wound around the drum. 4. The wire is rotatably held by a pin fixed to the holder, oscillatably supported by a pin passing through the base frame, and rotatably supported by a pin passing through an arm plate biased outward by a spring. claim wherein the number of the pulleys, that the four corners by the three pulleys which are rotatably held by the pin through the base frame is stretched 3
The automatic cutter device described in. 5. The rotation of the motor when the round blade moves in the direction of cutting the paper is forward rotation, at which time the slip clutch rotates in one direction and the slip clutch spring winds in the other direction. Claims characterized in that
The automatic cutter device according to item 4 .