JP2000289276A - Cutting apparatus for long medium and printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a hard long medium without reduction of speed even with a low- output motor by setting a speed at a movement initial time of a cam means for transmitting a mechanical power to a moving cutting edge to be higher than a speed when the long medium is being cut, and making a load torque of a driving source approximately equal from a movement start to a movement end. SOLUTION: A total cutting means 18 is constituted of a fixed cutting edge 18a and a moving cutting edge 18b axially supported to a shaft 18c, etc. An oscillation rod 19 is axially supported to a shaft 19a. A spring is set for engaging one end part 19b with a notch part 18d of the cutting edge 18b and opening the cutting edge 18b from the cutting edge 18a. A rod 20 is axially supported to a shaft 20a, having a U-shaped part 20c to be connected to a semicircular part 19c of the rod 19 being formed to one end. An interlocking rod 21 is coupled to a shaft 20b. A driving force of a motor 16 is transmitted to a cam member 12 of united first and second cams which comes in touch with a projecting part 8b of a head angle 8, thereby moving the cutting edge 18b to the cutting edge 18a via the rods 21, 20 and 19, whereby a tube 5 is cut. At this time, the cam makes an initial movement speed of the cutting edge 18b higher than when the tube 5 is being cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a long medium having a cutting means for smoothly cutting and cutting a continuous long medium such as a tube, and a printing apparatus having the same.

[0002]

2. Description of the Related Art Conventionally, a tube printer as shown in FIG. 2 is known as such a device for cutting a long medium and a printing device provided with the same.
Transports a long medium such as a tape (not shown) or a tube 5 in accordance with the characters or the number of characters input from the keyboard 3, prints it by the thermal printing unit 7, and divides the half into a plurality of half by the half cutting means 17. The cutting is performed, and finally the entire cutting is performed by the full cutting means 18.

The half-cutting means 17 and the full-cutting and cutting means 18 reduce the driving force from the motor 16 by a gear and operate with a sufficient cutting force via transmission means such as a cam.

[0004]

In such a tube printer, it is desirable to be able to use a plurality of different types of tapes and tubes, and therefore, it is possible to reliably cut long media of any material and hardness. I had to.

Furthermore, since most of these long media are made of plastic such as vinyl chloride, their hardness tends to change greatly depending on the temperature. Particularly, tubes in the cold state are compared with tapes at the normal temperature. And the cutting load torque in the cutting means was very hard.

Therefore, in order to cut a hard medium such as a tube in cold weather, the cutting drive source must be increased in output or
In order to generate sufficient torque, it has been necessary to change the reduction ratio of the transmission means for transmitting the driving force.

However, mounting a high-output motor has the disadvantage of increasing the cost, and changing the reduction ratio has the disadvantage of reducing the cutting speed.

An object of the present invention is to solve the above-mentioned problems of the prior art, and an object of the present invention is to cut a relatively hard long medium without performing speed reduction even with a low output motor. It is to provide a simple cutting device and a printing device.

[0009]

According to the present invention, there is provided an apparatus for cutting a long medium, comprising: a conveying means for conveying a long medium such as a tube;
Cutting means having a movable blade and a fixed blade for main cutting and cutting the conveyed long medium to a specific length, a drive source for driving the movable blade, and transmitting a driving force of the drive source to the movable blade. In the apparatus for cutting a long medium provided with a cam means, the cam means is formed such that the moving speed at the initial stage of moving the movable blade is faster than the moving speed of the movable blade during cutting of the long medium, and It is characterized in that the load torque is substantially the same from the start to the end of the movement of the movable blade, and preferably, the load torque is interposed between the cam means and the movable blade, and the movable blade is moved in the closing direction toward the fixed blade and is movable. A movable blade movement transmitting member is provided which presses the movable blade from the side toward the fixed blade as the moving speed of the blade decreases from a fast state to a slow state.

Further, the present invention provides a printing apparatus for a long medium, a conveying means for conveying a long printing medium such as a tube, a printing means for printing characters and the like on the long printing medium, and a long medium after printing. Cutting means provided with a movable blade and a fixed blade for cutting and cutting the main blade to a specific length, a drive source for driving the movable blade, and a cam medium for transmitting a driving force of the drive source. In the printing apparatus, the first cam means is formed so that the moving speed at the initial stage of moving the movable blade is faster than the moving speed of the movable blade during cutting of the long medium, and the load torque of the driving source is changed from the start of the moving of the movable blade. It is characterized by being substantially the same until the end, preferably interposed between the cam means and the movable blade, moving the movable blade in the direction of closing toward the fixed blade, and moving the movable blade from a fast state to a slow state. The movable blade is fixed from the side as it becomes Characterized in that it comprises a movable blade movement transmission member for pressing.

[0011]

As described above, according to the present invention, when cutting a long medium, the moving speed at the initial stage of moving the movable blade is made faster than during the cutting, so that the entire cutting time does not change as compared with the related art. In addition, a sufficient cutting force is generated even with a low-output motor by reducing the moving speed of the movable blade during cutting. Further, since the moving speed of the movable blade is changed according to the cutting condition, the load torque at the drive source can be made substantially the same from the start to the end of cutting.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 3 are enlarged plan views of a printing portion and a cutting area of a thermal printer which also serves as a tube and a label tape. FIG. 2 is an overall plan view of the printer.
FIG. 4 is a side view showing a drive mechanism of the full cutting means.

The printer 1 integrates a display unit 2, an input unit 3 with a keyboard, and a printing unit 4 for printing characters and the like on tubes and label tapes. An ink ribbon cassette 6 and a label tape cassette (not shown) And are detachable.

Further, by removing the label tape cassette and inserting the tube 5 instead, printing on the tube 5 is enabled.

The printer 1 uses a thermal transfer system. A thermal head 7 is provided at a position of a head angle 8 facing a platen roller 11, and the head angle 8 is connected to one end 8a of a shaft of a driving roller 9. And is urged toward a platen roller 11 by a spring 10. Also,
The other end convex portion 8b of the head angle 8 comes into contact with a cam surface of a first cam 14 described later by the bias of the spring 10.

The cam member 12 is rotatably provided on a shaft 13 and has a structure in which a first cam 14 and a second cam 15 are integrated. The cam member 12 is rotated in both left and right directions by driving a motor 16. As described above, the first cam 14 comes into contact with the other end projection 8b of the head angle 8 to transmit the movement of the thermal head 7 with respect to the platen 11 and the drive of the later-described full cutting means 18. , The second cam 1
Reference numeral 5 denotes a drive for driving a half-cut unit 17 described later.

The half-cutting means 17 is for cutting while leaving a part of the tube 5 and the label tape.
And is slidable toward the second cam 15 and urged toward the second cam 15 by the urging of a spring (not shown). It is a known one that cuts while leaving a part of the tape.

The full cutting means 18 includes a half cutting means 17
A fixed blade 18a and a movable blade 18b provided to be swingable about a shaft 18c with respect to the fixed blade 18a. It is a scissor-like structure composed of

The first swinging rod 19 is swingable about a shaft 19a, one end 19b of which is engaged with a notch 18d of a movable blade 18b, and the other end of which is a second swinging rod described later. 20
And a semicircular portion 19c that contacts
A spring 22 for urging the first swinging rod 19 to rotate rightward in FIG. 4 is hung on d. The movable blade 18b is opened from the fixed blade 18a by the urging of the spring 22.

The second swinging rod 20 is swingable about a shaft 20a at one end, and a shaft 20b connected to the interlocking rod 21 is protruded at the center thereof, and the second swinging rod 20 is provided at the other end. A "C" -shaped portion 20c that comes into contact with a semicircular portion 19c of one swinging rod 19
(A leading portion 20d and a leading portion 20e).

Reference numeral 21 denotes an interlocking rod. The interlocking rod 21 is connected to the shaft 20b of the second swinging rod 20, and is connected to the projection 8c of the head angle 8. Since the movable blade 18b is configured as described above,
Is driven by the first cam 14, the head angle 8 and the interlocking rod 21.
And the second swinging rod 20 and the first swinging rod 19.

The relationship between the semicircular portion 19c of the first swinging rod 19 and the "-"-shaped portion 20c of the second swinging rod 20 is as follows. First, the fixed blade 18a and the movable blade 18b shown in FIG. In the opened state, the bent front end 20d of the "-"-shaped portion 20c of the second swinging rod 20 comes into contact with the semicircular portion 19c,
The second swinging rod 20 pushes the first swinging rod 19 substantially straight in the swinging direction.

When the second swinging rod 20 further swings, the base portion 20c of the "-"-shaped portion 20c of the second swinging rod 20 is halfway.
e comes into contact with the semicircular portion 19c, and accordingly, the semicircular portion 19c of the first swinging rod 19 is pushed out slightly outward from the swinging direction, and around the point A of the shaft 19a. At the one end 19b, the movable blade 18b is pressed toward the fixed blade 18a. FIG. 8 shows this state.

As shown in the enlarged plan view of the cam shape in FIG. 5 and the graph of the cam rotation angle-radius correspondence in FIG. 6, the shape of the first cam 14 is the point H (angle = angle) of the home position before the operation of the printer. 0 °) to the point I (angle = 30 °), the radius remains 15.5 mm. From the point I to the point J (angle = 105 °), the radius is gently shortened (1).
From 5.5 mm to 13.5 mm) and from J point to K point (angle = 135 °), the radius is shortened slightly sharply (13.5 m).
m to 11.5 mm), K point to L point (angle = 170
(°) until the radius is sharply shortened (from 11.5 mm to 4.
0 mm), and the shape from the point L to the end point M (angle = 350 °) remains unchanged at a radius of 4.0 mm.

Accordingly, when the first cam 14 is rotated at a constant speed, the moving speed of the head angle 8 when the other end convex portion 8b of the head angle 8 is in contact with the point I to the point J is from the point K to the point L. Is approximately ヘ ッ ド of the moving speed of the head angle 8 in the state of contact with the head angle 8.

Here, from the end of printing to the end of the main cutting and the end of main cutting in the present printer, a description will be given with reference to FIGS. 1, 3, 4 and 5. FIG.

First, after printing is completed, the thermal head 7 is separated from the platen 11 to perform full cutting.
6 is driven to rotate the first cam 14 in the direction of arrow C in FIG. 3 (from FIG. 3 to FIG. 1).

When the first cam 14 rotates, the head angle 8 swings by the urging of the spring 10, and the interlocking rod 2
The movable blade 18b rotates leftward in FIG. 4 via the first, second swinging rods 20, and the first swinging rod 19. At this time, the first cam 1
Since the radius rapidly changes from the point L to the point K in FIG. 4, the head angle 8 swings abruptly, and the movable blade 18b also moves quickly from the point 1 to the point k in FIG.

In the movement of the movable blade 18b from the point 1 to the point k, the movable blade 18b does not come into contact with the tube 5 as shown in FIG.
Since the bent front end portion 20d of the zero-shaped "-"-shaped portion 20c is in contact with the semicircular portion 19c, the resistance from the fixed blade 18a is small, and the movement of the movable blade 18b can be accelerated.

Thereafter, while the other end projection 8b of the head angle 8 reaches from the point K to the point J, the radius of the first cam 14 changes abruptly, so that the head angle 8 swings slightly abruptly. The movable blade 18b also moves from the k point to the j point slightly earlier.

When the movable blade 18b moves from the k point to the j point, the movable blade 18b comes into contact with the tube 5, and the tube itself is elastically deformed before cutting. It will crush flat.

Here, the movable blade 1 is brought into contact with the tube 5.
When the movable blade 18b reaches the point k, the base portion 20e of the "-"-shaped portion 20c of the second swinging rod 20 comes into contact with the semicircular portion 19c. 18b is pressed toward the fixed blade 18a and the fixed blade 18
The resistance received from a increases, but its moving speed is 1-
The load on the motor 16 is prevented from increasing because it is slightly slower than the interval k.

Further, since the radius of the first cam 14 gradually changes while the other end convex portion 8b of the head angle 8 reaches from the point J to the point I, the head angle 8 gently swings, and similarly, the movable blade 18b also moves slowly from point j to point i.

When the movable blade 18b moves from the j point to the i point, the tube 5 has already been crushed, so that the tube 5 is gradually cut. At the time of this cutting, the movable blade 18
b receives the largest resistance, and furthermore, the movable blade 18b
Is pressed toward the fixed blade 18a, the resistance received from the fixed blade 18a increases, but the moving speed is minimized so as not to increase the load applied to the motor 16.

Subsequently, when the other end projection 8b of the head angle 8 reaches the point I, the movable blade 18b moves to the point i and is completely closed, and finally the other end projection 8b of the head angle 8 is closed. Reaches the point H, the printer disconnection process ends.

Here, the shape of the first cam 14 is not limited to the present embodiment, but may be a shape corresponding to the type of medium used such as the tube size, the motor, and other configurations. In the example, according to the size of the largest tube used, the head angle 8 and the second cam 15
The shape takes into account the relationship with

Further, in the case of a cutting device or a printing device that does not use a tube, it is not necessary to provide a compression section (a section where the tube is crushed) in this embodiment.

In the present embodiment, the engagement between the tip 20d and the base 20e of the "C" -shaped portion 20c of the second swinging rod 20 and the semicircular portion 19c of the first swinging rod 19 is achieved. Swinging the movable blade 18b in a state where there is little resistance without pressing the movable blade 18b toward the fixed blade 18a up to the vicinity of contact with the tube,
Since the pressing is performed in the direction perpendicular to the fixed blade 18a from the point of contact with the tube, the movement of the movable blade until it comes into contact with the tube can be further accelerated. The moving speed can be further reduced, and the load on the motor can be reduced.

[0039]

As described above, according to the present invention, when cutting a long medium, the moving speed at the initial stage of moving the movable blade is made faster than that during cutting, so that the entire cutting time remains unchanged as compared with the conventional one. In this way, by further reducing the cutting speed, a sufficient cutting force can be generated even with a low-output motor, and the moving speed of the movable blade is changed in accordance with the cutting condition. The load torque at the source can be substantially the same from the start to the end of cutting, thereby reducing the effect on the motor.

[Brief description of the drawings]

FIG. 1 is an enlarged plan view of a printing unit and a cutting area after cutting.

FIG. 2 is an overall plan view of the thermal printer.

FIG. 3 is an enlarged plan view of a printing section and a cutting area before cutting.

FIG. 4 is a side view showing a driving mechanism of a full cutting unit.

FIG. 5 is an enlarged plan view of a force shape.

FIG. 6 is a graph showing a cam rotation angle-radius correspondence.

FIG. 7 shows the second swinging rod 20 with the movable blade 18b opened.
FIG. 4 is a view showing a relationship between the first swinging rod 19 and the first swinging rod 19.

FIG. 8 shows the second swinging rod 20 with the movable blade 18b closed.
FIG. 4 is a view showing a relationship between the first swinging rod 19 and the first swinging rod 19.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer 5 Tube 6 Ink ribbon cassette 7 Thermal head 8 Head angle 10 Spring 11 Platen roller 12 Cam member 14 First cam 15 Second cam 16 Motor 17 Half cut means 18 Full cut means 18a Fixed blade 18b Movable blade 18c Shaft 18d Notch 19 First swinging rod 19a Shaft 19b One end 19c Semicircular portion 20 Second swinging rod 20c "C" -shaped portion 20d Tip 20e Base 21 Linking rod 22 Spring

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Takeuchi 1-11-2 Kyobashi, Chuo-ku, Tokyo F-term (reference) 2C058 AB08 AC06 AE07 AF51 LA03 LB04 LB34

Claims (4)

[Claims] 1. A transporting means for transporting a long medium such as a tube, a cutting means having a movable blade and a fixed blade for cutting the transported long medium to a specific length and cutting the movable medium, In a device for cutting a long medium, comprising a driving source to be driven and a cam means for transmitting the driving force of the driving source to the movable blade, the cam means adjusts the moving speed of the movable blade at the initial stage of moving the movable blade. A long-medium cutting device formed so as to be faster than a moving speed of a movable blade during cutting, wherein a load torque of a driving source is substantially the same from the start to the end of the movement of the movable blade. 2. The movable blade is interposed between the cam means and the movable blade, moves the movable blade toward the fixed blade in a closing direction, and moves the movable blade sideward as the moving speed of the movable blade decreases from a fast state to a slow state. The cutting device for a long medium according to claim 1, further comprising a movable blade movement transmitting member that presses the movable blade toward the fixed blade. 3. A conveying means for conveying a long medium such as a tube, a printing means for printing characters or the like on the long medium, and a movable blade for cutting and cutting the long medium after printing to a specific length. In a printing apparatus for a long medium including a cutting unit having a fixed blade, a driving source for driving the movable blade, and a cam unit for transmitting a driving force of the driving source, the first cam unit may be an initial moving blade. The moving speed of the movable blade during cutting of the long medium is formed faster than the moving speed of the movable blade, and the load torque of the driving source is substantially the same from the start to the end of the movement of the movable blade. Media printing device. 4. A movable blade is interposed between the cam means and the movable blade to move the movable blade in a direction to close toward the fixed blade, and to move the movable blade sideward as the moving speed of the movable blade decreases from a fast state to a slow state. The printing apparatus for a long medium according to claim 3, further comprising a movable blade movement transmitting member that presses the movable blade toward the fixed blade.