JP2001009779A - Automatic cutter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic cutter device capable of extending cutter longevity. SOLUTION: This device carries out sheet cutting movement (normal rotation) and returning movement (reverse rotation) to an original position of a cutter by normal rotation and reverse rotation of a motor 13. In this case, a sliding clutch 14 provided on a driving transmission part of the motor 13 is furnished, and cutting motion is carried out by normal rotation and reverse rotation of the motor 13 without using a sensor for a constant period of time and without a load and abrasion on the driving transmission part by the sliding clutch 14. Normal rotation of this motor 13 is not finished by the sensor, a switch, etc., but controlled to be finished after the motor 13 normally rotates for the constant period of time. This period of time is lengthened by adding margin time estimating a load to be applied for sheet cutting to a period of time when a round blade 3 starts moving, hits a curvature of a base frame 1 and stops.

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 a cutter life.

[0002]

2. Description of the Related Art In a conventional automatic 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. At this time, the wire is strongly wound around the drum. Because it slides with it attached,
Both the drums are worn and the sharpness of the cutter blade decreases,
In addition, the life of the auto cutter was due to the life of the wire and the drum because the wire breakage occurred prior to the motor failure, and the cutting operation was poor due to the decrease in the wire tension due to the decrease in the drum diameter. .

[0003]

As described above, in the conventional automatic 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.

Accordingly, an object of the present invention is to provide an automatic cutter device that can extend the life of the cutter in order to solve the above-mentioned problem.

[0005]

In order to achieve the above-mentioned object, an automatic cutter device according to the present invention comprises a cutter for cutting paper (forward rotation) by forward and reverse rotation of a motor, and a return movement of the cutter to its original position. (Reverse rotation)
Equipped with a slip clutch provided in the drive transmission section of the motor,
The slip clutch can perform forward and reverse rotations of the motor for a certain period of time without using a sensor, and perform a cutting operation without transmitting the drive of the motor.

Further, a base frame serving as a base, a plate-shaped fixed blade arranged in parallel in the paper transport direction and fixed to the base frame, and a cutting start position determined by a sensor rotatably held by a holder are determined. The round blade comes in contact with a part of the edge against the plate-shaped fixed blade, slides at right angles to the paper transport direction while rotating, and cuts the paper. It is preferable that the round blade cannot move at a predetermined position due to the contact.

Further, the slip clutch includes a clutch gear having a center portion formed in a cylindrical shape and meshing with the motor gear of the motor, a slip clutch spring wound around the center portion of the clutch gear, and an end portion of the slip clutch spring. It is preferable to provide a drum in which the bending upset is set in the notch.

[0008] Still further, it is preferable to provide a wire wound around the drum.

One wire is fixed to a holder, and is supported by a pin passing through a base frame so as to be able to vibrate freely, and one wire is rotatably held by a pin passing through an arm plate urged outward by a spring. And three pulleys rotatably held by pins passed through the base frame, and are preferably stretched at four corners.

Further, the rotation of the motor when the round blade moves in the direction of cutting the paper is assumed to be normal rotation. At this time, the slip clutch rotates in one direction, and the winding direction of the slip clutch spring is in the other direction. preferable.

[0011]

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

FIG. 1 and FIG. 2 are sectional views showing the configuration and operation of an embodiment of an automatic cutter device according to the present invention. FIG. 1 is a diagram showing a forward rotation, and FIG. 2 is a diagram showing a reverse rotation. This auto cutter device is arranged in parallel with the paper transport direction, is rotatably held by a plate-like fixed blade 2 fixed to a base frame 1 and a holder 3, and has a round blade whose cutting start position A is determined by a sensor 4. 5 contacts the fixed blade 2 at its edge, slides at right angles to the paper transport direction while rotating, cuts the paper, and hits the bent portion of the base frame 1 so that the round blade 5 moves to the position B (FIG. 2). ) And cannot be moved. next,
One pulley 8 and a base frame, to which the holder 3 is fixed, which is supported by a pin passing through the base frame 1 so as to be able to vibrate freely, and which is rotatably held by a pin passing through an arm plate 7 urged outward by a spring 6. The three pulleys 9, 10, and 11 rotatably held by pins passing through 1
It is composed of a slip clutch 14 which winds a wire 12 having a corner and transmits a drive of a motor 13. The motor 13 and the slip clutch 14 are connected by a motor gear.

[0013]

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

FIG. 3 is a perspective view showing the configuration of a slip clutch in an embodiment of the automatic cutter device according to the present invention. In the slip clutch 14 according to the present embodiment, the clutch gear 14a meshing with the motor gear 15 has a cylindrical center portion, a slip clutch spring 14b is fitted around the cylindrical portion, and the end of the slip clutch spring 14b is bent and raised. It is set in the notch of the drum 14c around which the wire 12 is wound.

FIG. 4 is a sectional view showing the rotation direction of the round blade in the operation of the embodiment of the present invention (at the time of forward rotation of the motor). The rotation direction of the motor 13 when the round blade 3 moves in the direction of cutting the paper (the direction a in FIG. 1) is set to forward rotation. At this time, the slip clutch 14 rotates in the x direction, and the slip clutch spring 14b The winding direction is the y-direction winding.

FIG. 5 is a sectional view showing the rotation direction of the round blade in the operation (at the time of reverse rotation of the motor) according to the embodiment of the present invention. Motor 1
Reference numeral 3 denotes a reverse rotation at the end of the normal rotation time, the slip clutch gear 14 rotates in the y direction, the round blade 3 moves in the b direction, and the reverse rotation of the motor 13 ends by the detection of the sensor 4, and the round blade 3 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 power of the printer is turned on. The cutting operation is performed when the motor 13 rotates in the forward direction, when the clutch gears 14a,
The slip clutch spring 14b and the drum 14c integrally rotate in the x direction, and thereafter, as shown in FIG. 2, the round blade 3 slides in the a direction to the position B where the paper cut ends and the base frame 1 is bent. .

FIG. 6 is a diagram showing the relationship between the movement of the round blade and the forward rotation of the motor. Control is performed such that the normal rotation of the motor 13 does not end with a sensor, a switch, or the like, but ends with a normal rotation for a predetermined time. During this time, the round blade 3 starts moving and the base frame 1
The length of time to stop when hitting the sheet is increased by adding a margin time to allow for the load on the paper cutting. Therefore, when the movement of the round blade 3 is stopped, the forward drive of the motor 13 is transmitted to the motor gear 15 and the clutch gear 14a, and the sliding clutch spring 14b tries to rotate in the x direction. Wire 12 with stop
Is stopped, the rotation of the drum 14c around which the wire 12 is wound also stops, so that a force in the G direction acts on the bent and raised portion of the slide spring 14b set in the notch of the drum 14c. 1
When the clutch gear 14a is opened, the engagement of the clutch gear 14a around the center cylinder is reduced, and the clutch gear 14a idles. Due to this idling, the forward drive of the motor 13 is not transmitted.

Thereafter, as shown in FIG. 5, the motor 13 rotates reversely with the end of the normal rotation time, and the slip clutch gear 14
Rotates in the y direction, the round blade 3 moves in the b direction, and the sensor 4
, The reverse rotation of the motor 13 ends, and the round blade 3 stops.

[0021]

As described above, according to the automatic cutter device of the present invention, when the round blade stops moving due to the bending of the base frame and the motor rotates in the margin area, the motor is driven by the slip clutch. Also, since the drive is not transmitted to the round blade, the wire and the drum are not worn.

Therefore, the wire and the drum, which are factors that determine the life of the automatic cutter, can be eliminated from wear, and the life of the automatic cutter can be extended.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the configuration and operation (forward 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 illustrating a structure of a slip clutch according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an operation (forward rotation) of the slip clutch in the embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an operation (reverse rotation) of the slip clutch according to the embodiment of the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base frame 2 Fixed blade 3 Holder 4 Sensor 5 Round blade 6 Holder 7 Arm plate 8, 9, 10, 11 Pulley 12 Wire 13 Motor 14 Slip clutch 14a Clutch gear 14b Slip clutch spring 14c Drum 15 Motor gear

Claims (6)

[Claims] 1. An automatic cutter device for performing a cutter cutting movement (forward rotation) and a return movement (reverse rotation) of a cutter to an original position by forward rotation and reverse rotation of a motor, wherein the cutter is provided in a drive transmission part of the motor. An automatic cutter device comprising a slip clutch, wherein the slip clutch allows the motor to rotate forward and backward for a certain period of time without using a sensor, and performs a cutting operation without transmitting the drive of the motor. 2. A base frame serving as a base, a plate-shaped fixed blade arranged in parallel in the paper transport direction and fixed to the base frame, and a cutting start position determined by a sensor and rotatably held by a holder. A round blade, the round blade contacts a part of the edge with the plate-shaped fixed blade, slides at right angles to the paper transport direction while rotating, and cuts the paper; 2. The automatic cutter device according to claim 1, wherein the round blade cannot move at a predetermined position due to contact with a bent portion of the frame. 3. A slip clutch, wherein a center portion of the clutch is formed in a tubular shape, the clutch gear meshes with a motor gear of the motor, a slip clutch spring wound around the center portion of the clutch gear, and the slip clutch. The drum according to claim 2, wherein a bent portion of the end of the spring is set in the notch.
The automatic cutter device according to 1. 4. The apparatus according to claim 1, further comprising a wire wound around said drum. The automatic cutter device according to claim 3. 5. The wire is fixed to the holder, supported by a pin passing through the base frame so as to be able to vibrate, and rotatably held by a pin passing through an arm plate urged outward by a spring. The auto cutter device according to claim 4, wherein a square is formed by three pulleys and three pulleys rotatably held by pins passed through the base frame. 6. The rotation of the motor when the round blade moves in the direction of cutting the paper is set to forward rotation, and at this time, the slip clutch rotates in one direction, and the winding direction of the slip clutch spring changes in the other direction. The automatic cutter device according to claim 5, wherein