JPH0714652B2 - Printing method and printing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention automatically prints characters such as manufacturing date, weight, and amount of money by stopping the resin film for packaging which is intermittently transferred. The present invention relates to a printing method and a printing device.

[Conventional technology]

2. Description of the Related Art Conventionally, there has been known a rotary printing apparatus in which a printing die or a printing apparatus is provided on a peripheral surface of a printing member such as a rotating roll for rapid printing or marking on roll paper or individual articles. In this rotary type printing apparatus, it is necessary to match the peripheral speed of the printing die with the speed of the surface of the printing material and to align the printing position of the printing die with the printing position of the printing material, which complicates the structure. Therefore, there is a stamp type printing apparatus which, unlike the rotary type printing apparatus described above, uses a stamp mechanism for a printing member and prints on the surface of a stationary substrate.

However, the stamp-type printing apparatus has a problem relating to the supply of ink to the printing die, and a printing apparatus for solving this problem has been proposed, for example, as disclosed in Japanese Patent Laid-Open No. 59-42989 (31st publication). (Figures 34 to 34).

As shown in FIG. 31, the motor shaft is attached to the vertical wall 31 of the printer.
32 is provided, and the motor shaft 32 is driven by a drive motor (shown in FIG. 34) 33. A crank disk 34 is attached to the motor shaft 32, and the crank disk 34 is a connection link.
It is linked to the printing member 36 having the character portion 36a via 35.

As shown in FIGS. 33 and 34, 37 is a mounting block, which is supported by the housing 39 by the spring 38 and
A slide shaft 40 fixed to the housing 39 is adapted to slide in the vertical direction. The printing member 36 is mounted on the mounting block 37 so as to be rotatable around a shaft 41.

An ink roll device 42 has an ink roll 42a and an ink roll housing 42b rotated by an ink roll motor 43.

A cam follower arm 44 is integrally attached to the ink roll device 42, and the cam follower arm 44 is pulled by a tension spring 45, and its tip is in contact with a cam 32a attached to the motor shaft 32. Therefore, the ink roll device 42 rotates about the rotation shaft 46 provided on the vertical wall 31 of the printing device as the cam 32a rotates.

With the above configuration, the printing member 36 reciprocally reciprocally rotates, which allows the printing member 36 to move twice during one cycle movement.
The character portion 36a of 36 is close to the ink roll 42a.

FIG. 32 shows the rotated state of the ink roll device 42 when applying ink, and when the printing member 36 pivots around the shaft 41, it makes smooth contact with the displaced ink roll 42a. Next, when the printing member 36 that revolves around the shaft 41 contacts the stopper 37a of the mounting block 37, the printing member 36 together with the mounting block 37 operates along the slide shaft 40 at a right angle to the material A to be printed. That is, the linear movement is discontinuous from the circular movement like the locus X. The printing material A is printed by this linear movement. After the printing, the locus Y is discontinuously moved from a linear movement like a locus Y.

[Problems to be solved by the invention]

However, in the above stamp type printing apparatus, the movement of the printing member 36 is forcibly converted from the rotational movement to the linear movement by contacting the stopper 37a and from the linear movement to the rotational movement by contacting the stopper 47. Therefore, it is not smooth and unreasonable force is applied to the stopper 37a and the stopper 47. As a result, the operating speed of the printing member 36 must be reduced, and the printing speed is low.

When applying ink, the printing member 36 moves along the arcuate portion of the locus X, at which time the cam follower arm 44 is pushed by the cam 32a, causing the ink roll 42a to rotate about the rotary shaft 46. According to the shape of the cam 32a formed by the movement, the character portion 36a of the printing member 36 and the ink roll 42a come into line contact with each other, but the ink roll 42a is rotated by the ink roll motor 43, and at the same time, in the Z direction. To the printing member 36 because the ink of the ink roll 42a is scattered.
Ink could not be evenly applied to the printing element 36a.

In order to solve the above-mentioned problems of ink scattering and ink non-uniform adhesion, when the printing member 36 is fixed and the printing member 36 moves along the arc portion of the locus Y, the printing member 36 is released from the ink roll 42a. On the other hand, a mechanism for contacting the ink roll 42a when moving along the arc portion of the locus X may be considered. For that purpose, the type portion 36 of the printing member 36 from the shaft 41 can be considered.
The distance L to a is variable, and the locus X, Y of the printing member 36
It is necessary to make it variable while synchronizing with the movement along.
It is difficult to configure such a mechanism with the components of the conventional stamp type printer.

[Object of the Invention]

The present invention has been made to solve the above-mentioned problems, and an object thereof is to make the type portion of a printing member smoothly contact the ink roll in a state where the ink roll is not moved at the time of inking so that the ink is evenly distributed. It is an object of the present invention to provide a printing method and a printing device which can be attached to a print part and further increase the printing speed.

[Means for solving problems]

In order to achieve the above-mentioned object, the first aspect of the present invention swivels about a swivel axis provided on a support plate along a path between a print preparation position close to a printing material and a maximum swiveling position away from the printing material. And a printing member having a flat print part,
An ink roll that is rotationally driven in a fixed direction, and the printing member is repeatedly reciprocally oscillated along the path, so that the printing portion of the printing member is twice rotated during one cycle movement of the printing member. When the printing member moves in the direction opposite to the ink roll rotation direction, the printing part and the ink roll do not come into contact with each other, and the printing part moves when the printing member moves in the ink roll rotation direction. In the printing method of supplying ink by contacting, when the printing member moves from the print preparation position to the maximum swing position while being guided by the cam follower along the cam groove,
Keep the ink roll away from the swivel axis so that it does not come into contact with the print type on the printing member, while the printing member moves from the maximum swivel position to the print ready position while the cam follower is guided along the cam groove. With the ink roll center and swivel axis kept constant by changing the distance between the print part of the printing member and the swivel axis by the cam follower guided by the curved path of the cam groove. The flat character portion of the member is brought into contact with the ink roll in line contact or in a state close thereto, and a second aspect of the present invention is that a crank is attached to a crank shaft which is rotatably supported by a support plate and rotated by a rotational power source. It is fixed and has a slide shaft on one end side integrally with this crank, and a flat print part on the other end side that is inked by the ink roll of the inking device. In addition, a type unit with a cam follower is linked with a connecting link, and a swing unit equipped with a bearing that slides the slide shaft of the type unit on a swing shaft that is rotatably supported by a support plate. The cam plate with a cam groove that guides the cam follower on the support plate, and the character part of the type unit makes line contact with the ink roll or close to it when applying ink. The curved path and the straight path that is perpendicular to the printed material via an arbitrary path to the curved path.

[Operation of the invention]

According to the first aspect of the present invention, the position of the ink roll is maintained in a fixed state when the printing member moves from the maximum swiveling position to the print preparation position during the application of ink, and the printing member has Touch the ink roll while changing the distance. That is, unlike the conventional example, there is no abrupt movement of the ink roll. Therefore, the ink is not subjected to the inertial force due to the movement of the position of the ink roll.

According to the second aspect of the present invention, when the crank fixed to the crank shaft is rotated by the rotary power source, the type unit swings via the connecting link while its cam follower is guided by the cam groove of the cam plate.

When the crank is rotated to guide the cam follower along the linear path of the cam groove, the slide shaft of the type unit slides on the bearing of the turning unit, and the type unit reciprocates linearly. At this time, the revolving unit does not make a rotational movement. Therefore, the type portion of the type unit moves at a right angle with respect to the material to be printed, and marking is performed when the crank reaches the bottom dead center.

When the crank is further rotated, the type unit receives a pushing-down force or a pulling-up force via the connecting link. As a result, the cam follower is guided from the straight line path to the curved path of the cam groove, and the type unit reciprocally swings about the swing axis while changing the distance from the swing axis. That is, the rotation of the type unit is transmitted to the swivel unit, and at the same time, the slide shaft of the type unit slides on the bearing of the swivel unit, so that the type unit reciprocally swivels.

By rotating the crank and guiding the cam follower along the curved path of the cam groove in the direction of the straight path of the cam groove, the rotation of the type unit is transmitted to the swivel unit, and at the same time, the slide shaft of the type unit slides on the bearing of the swivel unit. While moving, the type unit makes a reciprocating swivel motion. With the reciprocating swiveling movement of the time unit, the distance between the type portion and the swivel axis changes, and ink is applied from the ink roll to the type portion while the type portion is in line contact with the ink roll or in a state close thereto.

Example of Invention

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a printing apparatus according to an embodiment of the present invention.

In the figure, reference numeral 1 is a support plate, on the front side of which the respective components shown in FIG. 1 are attached, and on the rear side thereof the respective components shown in FIG. A mounting member 1a and a protective cover (not shown) for mounting the components shown in FIG. 1 are also mounted on the support plate 1.

An electric motor 2 is the only rotational power source that drives the device.

Reference numeral 3 denotes a crankshaft penetrating the support plate 1, which is rotatably supported by a first bearing 1b provided on the mounting member 1a and is rotated by an electric motor 2.

A disc-shaped crank 4 and an ink roll cam 5 are fixed to the front surface side of the support plate 1 of the crankshaft 3. As shown in FIG. 4, the ink roll cam 5 is a substantially circular plate body, and the peripheral portion thereof is a to b, a to c, a c, a d, and a d.
It is divided into sections from Ho to I. Section from B to C (angle θ
_{In 2} ), the large diameter portion 5a having a constant radius R ₁ is formed.

In the section from c to d, it gradually decreases from a constant radius R ₁ and becomes a radius R ₂ at the point of d, and in the section from d to e (angle θ ₁ ).
A small-diameter portion 5b having a constant radius R ₂ is formed. At point a, a groove portion 5c that is sharply recessed is formed.

On the rear surface side of the support plate 1 of the crankshaft 3, the crank pulley 6,
The slit plate 7 is fixed. The rotation of the electric motor 2 is decelerated and transmitted to the crank pulley 6 via the motor timing belt 8. The slit plate 7 is provided with a slit 7a on the outer peripheral portion thereof. The slit 7a is detected by the photoelectric tube sensor 7b so that the signal of the stop position of the crankshaft 3 is transmitted to a control circuit (not shown). Has become.

Reference numeral 9 is a connecting link, which is a link bearing 9a provided at one end thereof.
The crank pin 4a is supported by the crankshaft 4a, the type unit pin 10b is supported by the link bearing 9b provided at the other end, and the crankpin 4a and the type unit pin 10b are respectively the crank 4,
It is fixed to the type unit (printing member) 10.

That is, the type unit 10 is linked to the crank 4 via the connecting link 9.

The type unit 10 is a block body held by the connecting link 9 by the type unit pin 10b, has a cam follower 10a near the support plate 1, and integrally has two slide shafts 10c at one end side. On the other end of the flat typeface 1
Has 0d. The character portion 10d is made of metal and is detachably supported by a type holder (not shown) provided in the type unit 10. In addition, the type unit 10 has a built-in heater and temperature detector (not shown).
10d is kept at a constant temperature.

Reference numeral 11 denotes a pivot shaft that penetrates the support plate 1, and is rotatably supported by a second bearing 1c provided on the support plate 1. A turning unit 12 is fixed to the front side of the support plate 1 of the turning shaft 11. This swivel unit 12 is provided with two slide bearings 12a and is fixed to the type unit 10 as a slide shaft.
10c is slidably supported. That is, turning unit 1
2 supports the type unit 10 slidably.
A turning pulley 25 is provided on the rear side of the support plate 1 of the turning shaft 11.

A cam plate 13 is fixed to the support plate 1, and a cam follower 10
A cam groove 13a for guiding a is provided. This cam groove
The shape of 13a will be described later.

14 is an inking device for inking the type part 10d,
A hinge shaft 15 penetrating the support plate 1 and fixed to the support plate 1, and a roll plate 16 rotatably provided on the hinge shaft 15.
And a follower arm provided at one end of the roll plate 16
17 and an ink roll shaft provided on the other end of the roll plate 16
18 and an ink roll 19 integrally attached to the ink roll shaft 18. To describe this in detail, one end side of the roll plate 16 is fixed to the follower arm 17 via a contact amount adjusting mechanism 17b, and an ink roll cam follower 17a is attached to the tip end. The follower arm 17 serves to change the displacement of the ink roll cam follower 17a caused by the rotation of the ink roll cam 5 into the swinging motion of the roll plate 16 about the hinge shaft 15. The contact amount adjusting mechanism 17b is for adjusting the mounting angle of the follower arm 17 attached to the roll plate 16, and by this mechanism, the contact amount between the type face and the ink roll 19 when applying ink to the type portion 10d. Can be adjusted.

A roll plate bearing 15a is attached to the front side of the hinge shaft 15, and a roll plate 16 is attached to the outside of the roll plate bearing 15a. That is, the roll plate 16 is the roll plate bearing 15
The hinge shaft 15 is swingably supported by a. Further, on the rear surface side of the hinge shaft 15, an idler gear 20 and an idler pulley 21 are integrally attached via a bearing (not shown) with the shaft being common, and are rotatable with respect to the hinge shaft 15. .

A tension spring 22 is interposed between the other end side of the roll plate 16 and the support plate 1, and the tension spring 22 causes the ink roll cam follower 17a to move.
Has been pressed.

A roll heater box 23 is fixed to the other end of the roll plate 16 via a heat insulating material (not shown).
The roll heater box 23 has a heater and a temperature detector (not shown) to keep a constant temperature.

The ink roll shaft 18 penetrates the support plate 1 and is rotatably supported by an ink roll bearing (not shown) attached to the roll plate 16. At the portion of the support plate 1 through which the ink roll shaft 18 penetrates, the roll plate 16
A hole (not shown) having a size such that the support plate 1 and the ink roll shaft 18 do not come into contact with each other even when the ink roll shaft 18 moves due to the swinging of the ink is opened. Ink roll shaft 18
An ink roll gear 24 is fixed to the rear surface side of the support plate 1.

The ink roll 19 is a roll obtained by impregnating an open-cell sponge with a heat-meltable ink, and is heated and kept warm by the roll heater box 23 to bring the ink into a fluid state.

Next, the drive system of the ink roll device 14 will be described.

A turning pulley 25 provided on the rear side of the support plate 1 of the turning shaft 11
A one-way clutch 26 is press-fitted in the center of the. The one-way clutch 26 intermittently transmits the repetitive rotational movement of the revolving shaft 11 to the revolving pulley 25 to rotate the revolving pulley 25 in one direction.

A timing belt 27 is hung between the turning pulley 25 and the idler pulley 21. By appropriately combining the radii of the swivel pulley 25 and the idler pulley 21, and the number of teeth of the idler gear 20 and the ink roll gear 24, the speed of the printing surface of the print part 10d when ink is applied from the ink roll 19 to the print part 10d. (Including the direction) and the peripheral speed of the ink roll 19 match.

Next, the shape of the above-mentioned cam groove 13a will be described with reference to FIGS.

As shown in FIG. 5, the cam groove 13a is a substantially crank-shaped path, and has a curved path (ab) through which the type unit 10 passes in the vicinity of the ink roll 19 and a curved path (ab). (B to c) and a straight path (a to d). The straight paths (c to d) are perpendicular to the material to be printed, and the center of the swivel shaft 11 is located on the extension line.

In FIG. 6, when applying ink, it is necessary that the print surface of the print portion 10d does not dig into the surface of the ink roll 19 and is in contact with the ink roll 19 in a line contact state in which it does not separate or in a state close thereto. is there. In this case, since the ink roll 19 is fixed, it is necessary to change the distance L from the center of the swivel shaft 11 to the printing surface of the printing portion 10d, and in order to satisfy the above conditions, the cam groove 13a is formed. The route is determined as shown in FIG. 6 as follows.

Lc for the turning angle θ is given by Lc = L−Lf = Ccos θ−r−Lf.

When the print surface length is Lt, Given in.

Here, Lc: Distance from center of cam follower 10a to center of swivel axis 11 (variable) Lt: Length of print surface C: Distance from center of ink roll to center of swivel axis 11 (fixed value) L: Print surface To the center of the swivel axis 11 (variable) Lf: Distance from the print surface to the center of the cam follower 10a (fixed value) θ: Swing angle r: Ink roll radius The cam groove 13a that satisfies the above conditions is a curve ( It is the path formed by ab) and is the type part of the type unit 10.
When the ink 10d passes near the ink roll 19, the character portion 10d comes into line contact with the ink roll 19 or comes into contact therewith in a state close to the line contact.

Next, the operation of this embodiment will be described with reference to FIGS.

FIGS. 7 and 8 show the first operating state, FIGS. 9 and 10 show the second operating state, and FIGS. 11 and 12 show the third operating state.
Figures 14 and 15 show the fourth operating state, Figures 15 and 16 show the fifth operating state, Figures 17 and 18 show the sixth operating state, Figure 19 and
FIG. 20 shows the 7th operating state, FIGS. 21 and 22 show the 8th operating state, FIGS. 23 and 24 show the 9th operating state, and FIG. 25, 26.
The figure shows the 10th operating state, FIGS. 27 and 28 show the 11th operating state, and FIGS. 29 and 30 show the 12th operating state. The 12th operating state returns to the 1st operating state. The cycle is done.

Figure 7, Figure 9, Figure 11, Figure 13, Figure 15, Figure 17, Figure 17,
FIG. 19, FIG. 21, FIG. 23, FIG. 25, FIG. 27, and FIG. 29 mainly show the movements of the type unit 10 and the swing unit 12. Figure 8, Figure 10, Figure 12, Figure 14, Figure 16, Figure 18,
FIG. 20, FIG. 20, FIG. 22, FIG. 24, FIG. 26, FIG. 28, and FIG. 30 mainly show the movements of the cam follower 10a and the inking device 14 on the cam plate 13.

In FIGS. 1 and 2, the electric motor 2 rotates when energized. The rotation of the motor pulley 2b attached to the motor shaft 2a is transmitted to the crank pulley 6 through the motor timing belt 8 after being decelerated. The rotation of the crank pulley 6 causes the crank shaft 3 fixed to the crank pulley 6 to rotate. By the rotation of the crankshaft 3, the crank 4, the ink roll cam 5, and the slit plate 7 fixed to the crankshaft 3 also rotate.

As the slit plate 7 rotates, the slit 7a passes through the photoelectric tube sensor 7b. At that time, photoelectric sensor
7b detects the slit 7a of the slit plate 7 and issues a stop position signal. A control circuit (not shown) receives this stop position signal to cut off the power supply to the electric motor 2. The position of the slit 7a of the slit plate 7 is determined by the crank 4 and the ink roll cam 5 when the slit plate 7 passes the photoelectric tube sensor 7b.
Is in the first operating state (the cam follower 10a is in the cam groove 13a
(Corresponding to the position of point c).

The control circuit starts energization of the electric motor 2 by receiving the marking start signal from the outside, and the photoelectric tube sensor 7b
The electric power to the electric motor 2 is cut off by receiving the signal from the electric motor 2. That is, the crankshaft 3 starts to rotate in response to a marking start signal from the outside, and stops after being rotated once by the stop position signal, so that the apparatus carries out one marking operation.

The first operation state indicates a fixed position stop state, and the type unit 10 is located at the print preparation position close to the printing material.

In the first operation state, as shown in FIG. 8, the ink roll cam 5 has a groove portion 5c for the ink roll cam follower.
It is in contact with 17a. Therefore, the ink roll 19 swings by the maximum amount about the hinge shaft 15 and is located closest to the print character portion 10d. When the crank shaft 3 rotates in this state, the ink roll cam follower 17a by the ink roll cam 5 is rotated regardless of whether the crank shaft 3 rotates left or right.
The amount of displacement of is increased.

On the other hand, since the ink roll cam follower 17a is pressed against the ink roll cam 5 by the tension spring 22, when the displacement amount by the ink roll cam 5 increases, the tension spring 22 is extended and the spring force increases. The force for pressing the roll cam follower 17a against the ink roll cam 5 is increased. That is, the ink roll cam 5 needs a force to extend the tension spring 22 regardless of whether the ink roll cam 5 rotates from the first operating state to the left or right. This means that even if the ink roll cam 5 is at a position slightly rotated to the right or left from the first operation state, a force that always returns to the stopped state acts.

From the first operating state, the electric motor 2 causes the crankshaft 3 to rotate and the crank 4 to rotate. As a result, the type unit 10 is pushed down via the connecting link 9. At this time, the cam follower 10a of the type unit 10 moves the cam plate 13
Of the cam groove 13a, the swivel unit 12 does not rotate (the extension line of the straight part of the cam groove 13a shown in FIG. Axis 1
To pass through the center of one). Therefore, the type unit 10
The slide shaft 10c is attached to the slide bearing 1 of the swing unit 12
It slides to 2a and moves linearly downward.

When the crank 4 reaches the bottom dead center, the second operation state is set,
The seal is stamped.

The linear motion for the marking is between the first operating state and the second operating state, and after the marking is the returning linear motion between the second operating state and the third operating state. During this time cam follower 10a
Will reciprocate in the straight portions (c to d) of the cam groove 13a.

Further, when the crank 4 rotates from the third operation state, the type unit 10 is pulled upward through the connecting link 9, and the fourth operation state → fifth operation state → sixth operation state → seventh operation state → third operation state. 8 Proceed to the operating state. That is, the cam groove 13a
The cam follower 10a is guided along the curved path (c-b) of (1), and the swing unit 12 swings clockwise about the swing axis 11 while changing the distance from the swing axis 11.
In other words, the rotation of the type unit 10 is the rotation unit 12
To the slide shaft 10c of the type unit 12 at the same time
Makes a swing motion while sliding on the bearing 12a of the swing unit 12. When the crank 4 reaches the top dead center, the eighth
In operation, the type unit 10 is in the maximum swivel position away from the substrate.

Next, during the period from the eighth operating state to the twelfth operating state to the first operating state, the type unit 10 receives a downward pushing force as the crank 4 rotates, contrary to the above. At this time, the cam follower 10a is guided along the curved path (a to c) of the cam groove 13a, and the swing unit 12 swings counterclockwise about the swing axis 11 while changing the distance from the swing axis 11. To do. Ink is applied from the ink roll 19 to the printing surface of the printing portion 10d between the ninth operation state and the eleventh operation state.

This inking is possible by using the following method.

The type portion 10d of the type unit 10 makes a swivel motion about the swivel axis 11 with its type surface facing the ink roll 19. Here, if the distance L between the rotary shaft 11 and the print surface of the print portion 10d of the type unit 10 is fixed, a cylindrical ink roll 19 is used for the print portion 10d having a flat print surface. When performing inking, it is necessary to move the ink roll 19 closer to or further away from the type unit 10 as the type unit 10 turns.

Accordingly, the crank 4 is rotated to guide the cam follower 10a from the point a of the cam groove 13a to the point b along the curved path (ab) of the cam groove 13a. Then, the rotation of the type unit 10 is transmitted to the swivel unit 12, and at the same time, the slide shaft 10c of the type unit 10 slides on the bearing 12a of the swivel unit 12, and the type unit 10 swivels. Therefore, as the type unit 10 turns, the type part 10
The distance L between the print surface of d and the swivel shaft 11 changes, and the print portion 10d contacts the ink roll 19 in a line contact or in a state close to the same, from the cylindrical ink roll 19 to the flat print surface of the print portion 10d. Ink is applied to the.

Next, the operation of the ink roll cam 5 will be described in detail.

As described above, with the rotation of the crankshaft 3, the type surface 10d of the type unit 10 repeats the inking operation, the marking operation, and the operation of connecting them. This is
The operation in which the type unit 10 turns in the clockwise direction and the operation in which it turns in the counterclockwise direction are alternately repeated. That is, while the crank 4 makes one rotation,
The cam follower 10a passes between a and b of the cam groove 13a twice, that is, in the clockwise direction and in the counterclockwise direction, and the inking operation occurs twice. To prevent this, the ink roll cam 5 is used. That is, the rotating ink roll cam 5 presses the ink roll cam follower 17a so that the ink roll cam follower 17a follows and operates, whereby the ink roll 19 swings around the hinge shaft 15 in synchronism with the swing movement of the type unit 10. do.

FIG. 4 shows the shape of the ink roll cam 5 described above. To explain the operation according to the shape, the state where the ink roll cam 5 and the cam follower 10a contact at position a is the above-mentioned fixed position stop position. .

Between a and b, the ink roll 19 swings away from the type portion 10d of the type unit 10 as the ink roll cam 5 rotates.

Between B and C (third operating state to sixth operating state)
Then, while the type unit 10 swivels from the print preparation position toward the maximum swivel position, the large diameter portion 5a of the ink roll cam 5
Since the ink follower cam follower 17a is pressed against, the ink roll 19 swings about the hinge shaft 15 away from the type portion 10d of the type unit 10.
Moreover, since the large-diameter portion 5a has the constant radius R ₁ , the ink roll 19 is kept away from the type portion 10d of the type unit 10.

Between C and D (Sixth operating state to eighth operating state)
Then, the ink roll 19 is the type part 10d of the type unit 10.
Swing to approach. In other words, in the section from R to D (the second operation state to the eighth operation state of the operation description), the ink roll 19 sways in the direction away from the type portion 10d of the type unit 10 or remains away. During this period, the character surface of the character portion 10d and the ink roll 19 may come close to each other but do not contact each other.
No ink is applied to the 10d typeface.

Further, when the ink roll cam 5 rotates, it becomes a section from E to E.

Between D and E (eighth operating state to twelfth operating state), the type unit 10 turns from the maximum turning position toward the print preparation position, while the ink roll cam follower 17a is attached to the small diameter portion 5b of the ink roll cam 5. Is pressed, the ink roll 19 swings around the hinge shaft 15 in the direction of the type unit 10. Moreover, since the small diameter portion 5b is constant radius R _2, the lift amount of the ink roll cam 5 does not change, the ink roll 19, the position suitable for inking the typeface of the print portion 10d state Holding That is, in this section, as described above, the type unit 10 is the ninth operation explanation.
As shown in the operating state to the eleventh operating state, the printing surface of the printing portion 10d is brought into line contact with the ink roll 19 in a state of being in line contact or close to the printing surface, together with performing the operation for applying ink to the printing surface. Inking is performed.

During the period from e to a, the lift amount by the ink roll cam 5 further decreases, and the operation leads to the above-described fixed position stop position. During this time, the ink roll 19 is further swung from the position suitable for ink application toward the type portion 10d of the type unit 10.

As described above, when the ink roll cam 5 rotates, the ink roll 19 is synchronized with the movement of the type portion 10d of the type unit 10, and the ink roll 19 has a relief position for not being inked, and an ink roll 19 for inking. Inking position,
And it is located at the fixed position stop position.

Next, the driving operation of the ink roll 19 will be described.

As shown in FIGS. 1 and 2, when the type unit 10 is reciprocally rotated by the connecting link 9, the revolving unit 12 is reciprocally rotated via the slide shaft 10c, and the revolving shaft 11 is reciprocally rotated. Here, since the turning pulley 25 is provided on the turning shaft 11 via the one-way clutch 26, the turning pulley 25 is
It rotates only when the type unit 10 swings from the maximum swing position to the print preparation position, and does not rotate when swinging from the print preparation position toward the maximum swing position.

Therefore, only when the type unit 10 swings downward from the maximum turning position, the rotation is transmitted from the turning pulley 25 fixed to the turning shaft 11 to the idler pulley 21 via the timing belt 27, and the idler integrated with the idler pulley 21. Gear 20 rotates. Therefore, the ink roll gear 24 meshing with the idler gear 20 rotates, and the ink roll 19 rotating integrally with the ink roll gear 24 rotates only in the arrow direction.

According to the above configuration, when the type unit (printing member) 10 moves from the maximum turning position to the print preparation position when applying ink, the position of the ink roll 19 is maintained in a fixed state, and the type unit 10 is The ink roll 19 is contacted while changing the distance between the type portion 10d and the swivel shaft 11. Therefore,
Unlike the conventional example, the crawl 19 does not move rapidly. Therefore, the ink is not subjected to the inertial force due to the movement of the ink roll 19. As a result, the ink roll
It is possible to apply the ink uniformly to the character portion 10d of the type unit 10 without the ink on the surface 19 being scattered.

Further, the printing apparatus according to the present embodiment includes a cam groove 13a for controlling the movement of the type unit 10, a swivel mechanism around the swivel shaft 11, and a slide for changing the distance between the swivel shaft 11 and the type portion 10d of the type unit 10. Since it is composed of a mechanism and
By changing the distance L between the typeface and the center of the swivel shaft 11 as the type unit 10 turns, it is possible to apply ink to the flat typeface using the cylindrical ink roll 19. . Since the type unit 10 is guided by the cam shaft 13a based on such a structure, the transition from the reciprocating revolving motion of the type unit 10 to the reciprocating linear motion in the direction orthogonal to the printing object is smoothly performed, and the type unit is
The 10 exercises are carried out smoothly and no unreasonable force is applied. As a result, the printing speed can be increased.

In this embodiment, a cam groove 13a for controlling the movement of the type unit 10, a swing mechanism centering on the swing shaft 11, and a slide mechanism for changing the distance between the swing shaft 11 and the type portion 10d of the type unit 10 are used. The printing device is configured to change the distance L between the printing surface and the center of the swivel shaft 11 as the type unit 10 is swung, so that the ink roll is flattened on the printing surface.
Although it is possible to apply ink using 19, it is not limited to this, and for example, the type unit 10 and the turning unit 12 can be used.
While a hydraulic cylinder having a typeface at the end of the rod is provided integrally with, the rotational position of the crank 4 is detected by a position sensor, and the type unit 10 is operated by an appropriate control circuit.
The type unit 10 sends a signal to the electro-hydraulic servo mechanism for synchronizing the timing of changing the distance L between the printing surface and the center of the pivot shaft 11 with respect to the timing of the turning motion of the type unit 10 by controlling the hydraulic cylinder by the electro-hydraulic servo mechanism. It is also possible to control the position of the typeface of the structure in which the rotary unit 12 and the rotary unit 12 are integrated with respect to the rotary shaft 11.

In addition, in the present embodiment, the ink roll 19 has a structure that swings around the hinge shaft 15 by the rotation of the ink roll cam 5, but the structure is not limited to such a structure, and for example, It is also possible to detect the rotational position of the crank 4 by a position sensor and displace the ink roll 19 while synchronizing the ink roll 19 with the revolving movement of the type unit 10 by an appropriate control circuit, an actuator and the like to perform ink application.

Further, in the present embodiment, the ink roll 19 is a turning shaft.
Although the mechanism rotates in one direction by the reciprocating rotary motion of 11, the invention is not limited to this, and an ink roll motor different from the electric motor 2 is installed, and this ink roll motor is used as the type unit 10 type. It can also be rotated in synchronization with the speed of the part 10d.

Further, in the present embodiment, the ink roll 19 is a roll impregnated with the hot-melt ink, but the ink is not necessarily limited to this, and a normal ink whose properties do not change due to heat can be used.

〔The invention's effect〕

As described above, according to the printing method of the first invention,
The ink on the ink roll does not scatter when the type unit's type section is in contact with the ink roll without moving the ink roll when applying ink, and it is possible to apply the ink evenly to the type unit's type section. According to the printing apparatus of the second aspect of the present invention, the printing unit according to the second aspect of the present invention smoothly contacts the type portion of the type unit with the ink roll without moving the ink roll when applying ink, thereby increasing the printing speed. There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front configuration diagram of a printing apparatus according to an embodiment of the present invention,
FIG. 2 is a rear view of the same printer, FIG. 3 is a cross-sectional view of essential parts, FIG. 4 is an explanatory view of the shape of an ink roll cam, and FIG. 5 is an explanatory view showing the relationship between a swivel shaft and a cam groove. FIG. 6 is an explanatory view showing the interrelationship among the ink roll, the printing surface, the cam follower, and the turning axis, FIGS. 7 and 8 are operation explanatory views in the first operating state, and FIGS. Operation explanation diagram of operation state, 11th
Figures and 12 are explanatory diagrams of operation in the third operating state, and Figures 13 and 14
The figure is the operation explanatory view of the 4th operating state, and the figures 15 and 16 are the 5th.
Operation explanatory diagram of operating state, FIGS. 17 and 18 are operational explanatory diagram of 6th operating state, FIGS. 19 and 20 are operational explanatory diagram of 7th operational state, FIG. 21 and FIG. 22 are FIG. 8 operation explanation diagram,
23 and 24 are explanatory diagrams of operation in the ninth operating state, FIG. 25, and FIG.
FIG. 26 is an operation explanatory view of the 10th operating state, and FIGS. 27 and 28 are
11 Operation explanatory diagram of operating state, FIGS. 29 and 30 are operation explanatory diagram of 12th operating state, FIG. 31 is a front configuration diagram of a conventional stamp-type printing apparatus, and FIG. 32 is an operational state explanation of the apparatus. Figure,
FIG. 33 is a perspective view of a mounting block of the device, and FIG. 34 is a rear view of the device. 1 ... Support plate, 2 ... Electric motor, 3 ... Crank shaft,
4 ... Crank, 5 ... Ink roll cam, 6 ... Crank pulley, 8 ... Motor timing belt, 9 ...
Connection link, 10 …… Type unit, 10a …… Cam follower, 10c …… Slide shaft, 10d …… Type section, 12 …… Swivel unit, 12a …… Slide bearing, 13 …… Cam plate, 1
3a ... cam groove, 14 ... inking device, 15 ... hinge shaft, 16 ... roll plate, 17 ... follower arm, 17a ...
… Ink roll cam follower, 18 …… Ink roll shaft, 19 …… Ink roll, 22 …… Tension spring.

Claims (3)

[Claims] 1. A flat type portion which swivels around a swivel axis provided on a support plate along a path between a print preparation position close to the print substrate and a maximum swivel position away from the print substrate. A printing member and an ink roll that is driven to rotate in a certain direction are provided, and the printing member is repeatedly reciprocally oscillated along the path, so that the printing member is printed twice during one cycle movement of the printing member. When the printing member moves in the direction opposite to the ink roll rotation direction, the printing part and the ink roll do not come into contact with each other when the printing member moves in the direction opposite to the ink roll rotation direction. In a printing method of supplying ink by contacting with an ink roll, when the printing member moves from the print preparation position to the maximum swing position while guiding the cam follower along the cam groove.
Keep the ink roll away from the swivel axis so that it does not come into contact with the print section of the printing member, while the printing member moves from the maximum swivel position to the print preparation position while the cam follower is guided along the cam groove. With the ink roll center and swivel axis kept constant by changing the distance between the print part of the printing member and the swivel axis by the cam follower guided by the curved path of the cam groove. A printing method, characterized in that the flat print part of the member is brought into line contact with or close to the ink roll. 2. A crank is fixed to a crank shaft which is rotatably supported by a support plate and is rotated by a rotary power source. The crank has a slide shaft integrally at one end and ink at the other end. A type unit that has a flat type part that is inked by the ink roll of the attachment device and that has a cam follower is linked by a connecting link, and a type is attached to a swivel shaft that is rotatably supported by a support plate Fix the swivel unit equipped with a bearing that slides on the slide shaft of the unit, and fix the cam plate with the cam groove that guides the cam follower to the support plate. Consists of a curved path in which the print part contacts the ink roll in line contact or close to it, and a straight path that is perpendicular to the printed material via an arbitrary path to this curved path. A printing device characterized by. 3. An inking device, wherein a hinge shaft provided on a support plate, a roll plate rotatably provided on the hinge shaft, and an ink fixed to the crank shaft by a spring provided at one end of the roll plate. The roll cam includes a follower arm whose tip is pressed, an ink roll shaft rotatably supported on the other end side of the roll plate, and an ink roll fixed to the ink roll shaft and rotationally driven. The printing apparatus according to claim 2, wherein the printing apparatus is a printing apparatus.