JPS63315282A - Driving mechanism for stamp-type printer - Google Patents

Abstract

PURPOSE:To enable a printing member and an ink roll to be driven by a single rotating drive source, by providing an ink roll shaft with an ink roll gear in a body, rotatably providing an idle gear and an idle pulley on a support shaft fixed to a support plate, and engaging the ink roll gear with the idle gear. CONSTITUTION:With a swivel shaft 11 rotated by a printing member, rotation is transmitted from a swiveling pulley integral with the swivel shaft 11 to an idle pulley 21 through a timing belt, whereby an idle gear 20 integral with the timing belt is rotated. Therefore, an ink roll gear 24 engaged with the idle gear 20 is rotated, and an ink roll integral with the ink roll gear 24 is rotated. A one-way clutch is provided in a drive path from the swivel shaft 11 to the ink roll 19, so that only when the printing member is swiveled from a maximum swiveling position toward a preparatory position for printing, the rotation in only one direction is transmitted from the swivel shaft 11 to the ink roll 19 through the drive path, and the ink roll 19 is sequentially rotated in the same direction. The moving direction of the ink roll 19 is the same as the moving direction of a type part when the printing member is swiveled from the maximum swiveling position toward the preparatory position for printing.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention automatically prints characters such as date of manufacture, weight, amount, etc. on a packaging resin film, etc., which is intermittently transported, by keeping it stationary. The present invention relates to a drive mechanism of a stamp type printing device.

[Conventional technology]

BACKGROUND OF THE INVENTION Conventionally, rotary printing devices are known in which a printing die or printing device is provided on the circumference of a printing member, such as a rotating roll, in order to quickly print or mark rolls of paper or individual articles. In this rotary printing device, it is necessary to match the circumferential speed of the printing die to the speed of the surface of the printing material, and to match the printing position of the printing die to the printing position of the printing material, resulting in a complicated structure. Therefore, unlike the rotary printing apparatus described above, there is a stamp-type printing apparatus that uses a stamp mechanism for the printing member and does not print on the surface of a stationary printing material.

However, in the stamp type printing device, there is a problem regarding the supply of ink to the printing die, and a printing device to solve this problem has been proposed, for example, as shown in Japanese Patent Application Laid-Open No. 59-42989 (No. 33 (Figures 36-36).

As shown in FIG. 33, a motor shaft 32 is provided on a vertical wall 31 of the printing device, and this motor shaft 32 is connected to a drive motor (
(Illustrated in FIG. 36) 33. A crank disc 34 is attached to the motor shaft 32, and the crank disc 34 is linked via a connecting link 35 to a printing member 36 having a type portion 36a.

As shown in FIGS. 35 and 36, 37 is a mounting block supported by a housing 39 by a spring 38, and a slide shaft 40 fixed to the housing 39.
It is designed to slide up and down. The printing member 36 is rotatably attached to the mounting block 37 about a shaft 41 .

42 is an ink roll device, and an ink roll motor 43
The ink roll 42 rotated by the ink roll 42. a and an ink roll housing 42b.

Cam follower arm 4 integrated with ink roll device 42
The cam follower arm 44 is pulled by a tension spring 45, and its tip is in contact with a cam 32a mounted on the motor shaft 32.

Therefore, the ink roll device 42 rotates about a 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 repeatedly rotates back and forth,
As a result, the type portion 36a of the printing member 36 comes close to the ink roll 42a twice during one period of movement of the printing member 36.

FIG. 34 shows a rotated state of the ink roll device 42 during inking, and when the printing member 36 rotates about the shaft 41, it smoothly contacts the displaced ink roll 42a. The printing member 3 then pivots about the axis 41
6 comes into contact with the stopper 37a of the mounting block 37,
The printing member 36 is attached to the slide shaft 4 together with the mounting block 37.
0 and at right angles to the substrate A. That is,
It moves discontinuously from a circular motion to a linear motion like the trajectory X. The printing medium A is printed by this linear movement. After printing, it moves from a linear motion to a discontinuous arcuate motion like a trajectory Y.

[Problem that the invention seeks to solve]

However, in the drive system of a conventional printing device, the drive motor 33 for rotating the printing member 36 and the ink roll motor 4 for rotating the ink roll 42a are
3 is required, and two expensive rotary power sources are used.

[Object of the Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a drive mechanism for a stamp-type printing device that drives a printing member and an ink roll with one rotational drive source. That's true.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a support plate along a path between a print preparation position close to the printing substrate and a maximum pivot position away from the printing substrate. The printing member is rotated back and forth around a rotation axis provided in the support plate, and an ink roll that is rotated in a fixed direction is provided on the support plate, and the type portion of the printing member is rotated twice during one period of movement of the printing member on the ink roll. In a stamp type printing device that applies ink to a printing member from an ink roll in close proximity to each other, an ink roll gear is integrally provided on an ink roll shaft that supports the ink roll, and an idler gear and an idler gear are rotatably mounted on a support shaft fixed to a support plate. An idler booby is provided, and the ink roll gear and idler gear are engaged with each other. On the other hand, a rotating shaft that rotates when the printing member rotates is rotatably supported on a support plate, and a rotating pulley provided on this rotating shaft is provided with a timing. An idler pulley is connected via a belt, and a one-way clutch is further provided in the drive path from the pivot to the ink roll.

[Action of the invention]

According to the present invention, when the pivot shaft is rotated by the printing member,
Rotation is transmitted from the swing pulley that is integrated with the swing shaft to the idler pulley via the timing belt, and the idler gear that is integrated with the idler pulley rotates. Therefore, the ink roll gear that meshes with the idler gear rotates, and furthermore,
The ink roll integrated with the ink roll gear rotates.

Since a one-way clutch is provided in the drive path from the rotation axis to the ink roll, only when the printing member rotates from the maximum rotation position toward the printing preparation position, the rotation from the rotation axis to the ink roll in only one direction is possible. The ink rolls are transmitted through the drive path and sequentially rotate in the same direction. The direction of movement of the ink roll is the same as the direction of movement of the type portion when the printing member rotates from the maximum rotation position toward the printing preparation position.

[Embodiments of the invention]

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

1 to 5 show a drive mechanism of a stamp type printing device according to an embodiment of the present invention.

In FIG. 3, reference numeral 1 denotes a support plate, on the front side of which each component shown in FIG. 3 is attached, and on the rear side each component shown in FIG. 1 is attached. A mounting member 1a and a protective cover (not shown) are also mounted on the support plate 1 for mounting the components shown in FIG.

Reference numeral 2 is an electric motor, which is the only rotating power source that drives this device.

3 is a crankshaft passing through the support plate 1, which is rotatably supported by a first bearing lb provided on the mounting member 1a;
It is designed to be rotated by an electric motor 2.

A disc-shaped crank 4 and an ink roll cam 5 are fixed to the front side of the support plate 1 of the crankshaft 3. As shown in FIG. 6, the ink roll cam 5 is a substantially circular plate, and its peripheral edge has four openings.

It is divided into sections Ro~Ha, Ha~2, 2~Ho, and Ho~I. A large diameter portion 5a having a radius R3 of −4 is formed in the section (angle θ2) from the first to the third.

In the section of Haru 2, the constant radius R1 gradually decreases, reaching the radius R2 at the point 2, and the section 2 to E (angle θ1
) is formed with a small diameter portion 5b having a constant radius R2. At point A, a sharply recessed groove portion 5c is formed.

A crank pulley 6 is mounted on the rear side of the support plate 1 of the crankshaft 3.
, the slit plate 7 is fixed. The rotation of the electric motor 2 is decelerated and transmitted to the crank pulley 6 via a motor timing belt 8. The slit plate 7 is provided with a slit 7a on its outer circumference, and this slit 7a is detected by a phototube sensor 7b, and a signal indicating the stop position of the crankshaft 3 is transmitted to a control circuit (not shown). ing.

9 is a connecting link, and a link bearing 9 is installed at one end of the connecting link.
A crank pin 4a is supported by a, a type unit pin 10b is supported by a link bearing 9b provided at the other end,
The crank pin 4a and the type unit pin 10b are connected to the crank 4. It is fixed to the type unit (printing member) 10.

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

The type unit 10 is a block body held on the connecting link 9 by a type unit pin 10b, and has a cam follower 10a near the support plate 1, and integrally has two slide shafts 10c on one end side. However, it has a flat type part 10d on the other end side. The type portion 10d is made of metal and is detachably supported by a type holder (not shown) provided in the type unit 10. Further, the type unit 10 has a built-in heater and a temperature detector (not shown) to maintain the type portion 10d at a constant temperature.

Reference numeral 11 denotes a pivot shaft passing through the support plate 1, and is rotatably supported by a second bearing 1c provided on the support plate 1. Rotating axis 1
A swing unit 12 is fixed to the front side of one support plate 1. This swing unit 12 includes a slide bearing 12.
a are provided at two locations and slidably support a slide shaft 10c fixed to the type unit 10. In other words, the swing unit 12 supports the type unit 10 in a slidable manner. 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 is provided with a cam groove 13a in which a cam follower 10a is guided. The shape of this cam groove 13a will be described later.

Reference numeral 14 denotes an inking device for applying ink to the type portion 10d, which includes a support shaft 15 that passes through the support plate 1 and is fixed to the support plate 1, and a roll plate I6 that is rotatably provided on the support shaft 15. , the follower arm 17 provided on one end side of the roll plate 16, the ink roll shaft 18 provided on the other end side of the roll plate I6, and the ink roll ■9 integrally attached to the ink roll shaft 18. have. To explain this in detail, one end of the roll plate 1G is fixed to the follower arm 17 via a contact amount adjustment mechanism 17b, and an ink roll cam follower 17a is attached to the tip. The follower arm 17 is a cam follower 2 for ink roll by rotation of the ink roll cam 5.
7a0) Displacement of the roll plate 16 centered on the support shaft 15
It works to change the motion into a rocking motion. Hit amount adjustment mechanism 17b
is for adjusting the mounting angle of the follower arm 17 attached to the roll plate 16, and with this mechanism,
It is possible to adjust the amount of contact between the print surface and the ink roll 19 when ink is applied to the print portion 10d.

As shown in FIGS. 1 and 2, a roll plate bearing 15a is attached to the front side of the support 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 swingably supported by the support shaft I5 by the roll plate bearing 15a. In addition, the rear side Q of the support shaft 15 is connected to the idler gear 20 and the idler boot via the idler bearing 15b, using that shaft as a common shaft. J21 is integrally attached and is rotatable with respect to the support shaft 15.

A tension spring 22 is interposed between the other end of the roll plate 16 and the support plate 1, and the tension spring 22 presses the ink roll cam follower 17a against the ink roll cam 5.

In addition, a heat insulating material (not shown) is provided on the other end side of the roll plate 16.
A roll heater box 23 is fixed via the. The roll heater box 23 has a heater and a temperature detector (not shown), and is designed to maintain a constant temperature.

The ink roll shaft 18 passes through the support plate 1 and is attached to the ink roll bearing 1 attached to the roll plate 16.
It is rotatably supported by 8a. The part of the support plate 1 through which the ink roll shaft 18 passes is provided with a hole large enough to prevent the support plate 1 and the ink roll shaft 18 from coming into contact with each other even when the ink roll shaft 18 moves due to the rocking of the roll plate 16. 1d has been cleared. Further, an ink roll gear 24 is fixed to the rear surface side of the support plate 1 of the ink roll shaft 18.

The ink roll 19 is a roll made of open-cell sponge impregnated with heat-melting ink, and is heated and kept warm by a roll heater box 23 to keep the ink in a fluid state.

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

A one-way clutch 26 is press-fitted into the center of a swing pulley 25 provided on the rear side of the support plate 1 of the swing shaft 11. The one-way clutch 26 intermittently transmits the repetitive rotational motion of the rotating shaft 11 to the rotating pulley 25, thereby rotating the rotating pulley 25 in one direction.

A timing belt 27 is placed between the swing pulley 25 and the idler pulley 21. Here, the rotational speed of the ink roll 19 is given by the ink roll rotational speed - the rotational axis rotational speed X(ki)/i.

Here, k: Distance between the center of the ink roll and the center of the turning shaft i: The radius of the ink roll Therefore, the radius of the turning boob IJ25 and the idler pulley 21, the idler gear 20 and the ink roll gear 24
By appropriately combining the number of teeth of the ink roll 19, the speed (including direction) of the type surface of the type part 10d when inking from the ink roll 19 to the type part 10d matches the circumferential speed of the ink roll 19. It looks like this.

Next, the shape of the aforementioned cam groove 13a will be explained with reference to FIGS. 7 and 8.

As shown in FIG. 7, the cam groove 13a has a substantially crank-shaped path, and includes a curved path (a-b) in which the type unit 10 passes near the ink roll 19 and a curved path (a--
b ) via the straight path (c − c ) via the path (b − c )
d). The straight line path (c-d) is perpendicular to the printing material, and the center of the pivot axis 11 is located on the extension line of the straight line path (c-d).

In FIG. 8, when inking, the type part 10d
It is necessary to bring the printed characters into contact with the ink roll 19 in a line contact state or a state close to it, in which the typeface does not dig into the surface of the ink roll 19 and does not separate from it. In this case, since the ink roll 19 is fixed, it is necessary to change the distance I from the center of the pivot shaft 11 to the type surface of the type portion 10d, and in order to satisfy the above conditions, the cam groove 13a The path of is determined from FIG. 8 as follows.

Lc for the turning angle θ is Lc=L-Lt-Ccosθ-r-L.

is given by

The required turning angle 2θ for printing with ink when measuring the printing surface length is the law of nature.

is given by

Here, Lc: Distance from the center of the cam follower 10a to the center of the rotation axis 11 (variable) Lt: Type surface length C: Distance from the ink roll center to the center of the rotation axis 11 (fixed value) L: Type surface Lf: Distance from the printing 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 has a curved line ( The path is formed by a to b), and when inking the type part 10d of the type unit 10 passes near the ink roll 19, the type part 10d is in line contact with the ink roll 19 or in a state close to it. It is meant to be in contact.

Next, the operation of this embodiment will be explained based on FIGS. 9 to 32.

Figures 9 and 10 show the first operating state, Figure 11, 5 and 12.
The figure shows the second operating state, FIGS. 13 and 14 show the third operating state, FIGS. 15 and 16 show the fourth operating state, and FIGS. 17 and 18 show the fifth operating state. 19 and 20 show the sixth operating state, and FIG. 21 shows the sixth operating state.

Figure 22 shows the 7th operating state, and Figures 23 and 24 show the 8th operating state.
Fig. 25 shows the operating state, Fig. 26 shows the 9th operating state, Figs. 27 and 28 show the 10th operating state, and Figs. 29 and 3 show the operating state.
Figure 0 shows the 11th operating state, and Figures 31 and 32 show the 12th operating state.
A series of cycles are performed from the twelfth operating state back to the first operating state.

9, 11, 13, 15, 17, 19, 21, 23, and 25.

27, 29, and 31 mainly show the movements of the type unit 10 and the swing unit 12.

Figure 10, Figure 12, Figure 14, Figure 16, Figure 18,
FIG. 20, FIG. 22, FIG. 24, FIG. 26.

28, 30, and 32 mainly show the cam plate 13.
The cam follower 10a and the ink included device 14
shows the movement of

In the first time, in FIG. 3, when electricity is applied, the electric motor 2 rotates. Motor pulley 2 attached to motor shaft 2a
The rotation b is transmitted to the crank pulley 6 via the motor timing belt 8 at a reduced speed. crank pulley 6
Due to this rotation, the crankshaft 3 fixed to the crank pulley 6 rotates. A crank 4 fixed to the crankshaft 3 by rotation of the crankshaft 3. The ink roll cam 5° slit plate 7 also rotates.

By rotating the slit plate 7, the slit 7a
passes through the phototube sensor 7b. At this time, the phototube 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 and cuts off power to the electric motor 2. The position of the slit 7a of the slit plate 7 is such that when the slit plate 7 passes the phototube sensor 7b, the position of the crank 4 and the ink roll cam 5 is in the first operating state (cam follower 1
0a corresponds to the 0 point position of the cam groove 13a).

The control circuit starts energizing the electric motor 2 by receiving a stamping start signal from the outside, and starts supplying electricity to the phototube sensor 7.
In response to the signal from b, the electric motor 2 is de-energized. In other words, the crankshaft 3 starts rotating in response to a stamping start signal from the outside, and after one revolution, stops in response to a stop position signal, and the apparatus performs one stamping operation.

The first operating state indicates a fixed position stop state, in which the type unit 10 is located in a print preparation position close to the substrate.

In the first operating state, as shown in FIG. 10, the ink roll cam 5 is in contact with the ink roll cam follower 17a at its groove portion 5C. Therefore, ink roll 1
9 swings the maximum amount around the hinge shaft 15 and is at the position closest to the type portion 10d. When the crankshaft 3 rotates in this state, the amount of displacement of the ink roll cam follower 17a by the ink roll cam 5 increases regardless of whether it rotates to the left or right.

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 amount of displacement by the ink roll cam 5 increases, the tension spring 22 is stretched, the spring force increases, and the ink roll cam follower 17a is pressed against the ink roll cam 5 by the tension spring 22. The force pressing the roll cam follower 17a against the ink roll cam 5 increases. In other words,
The ink roll cam 5 requires a force to extend the tension spring 22 whether it rotates left or right from the first operating state. This means that even if the ink roll cam 5 is in a position rotated slightly to the left from the first operating state, there is always a force acting to return it to the stopped state.

From the first operating state, the electric motor 2 rotates the crankshaft 3, and the crank 4 rotates. As a result, the type unit 10 is pushed down via the connecting link 9. At this time, since the cam follower 10a of the type unit 10 is guided by the straight part (c-d) of the cam groove 13a of the cam plate 13, the swing unit 12 does not perform rotational movement (not shown in FIG. 7). (This is because the extension line of the straight line c-d of the groove 13a passes through the center of the pivot shaft 11). Therefore,
The type unit 10 slides its slide shaft 10c on the slide bearing 12a of the swing unit 12 to linearly move downward.

When the crank 4 reaches the bottom dead center, it enters the second operating state,
Stamping is done.

The period between the first operating state and the second operating state is a linear motion for stamping, and after stamping, there is a return linear motion between the second operating state and the third operating state. During this time cam follower 10
a reciprocates along the straight line portion (c-d) of the cam groove 13a.

Furthermore, when the crank 4 rotates from the third operating state, the type unit 10 is pulled upward via the connecting link 9, and the state changes from the fourth operating state to the fifth operating state to the sixth operating state.
The process progresses from the seventh operating state to the eighth operating state. That is, cam groove 1
Cam follower 10 along the curved path (C-b) of 3a
a is guided, and the swing unit 12 swings clockwise around the swing shaft 11 while changing the distance from the swing shaft 11. In other words, when the rotation of the type unit 10 is transmitted to the rotation unit 12, the rotation of the type unit 1
0 slide shaft 10c is the bearing 12 of the rotation unit 12
It will make a turning movement while sliding on a. crank 4
When it reaches top dead center, an eighth operating state is entered, and the type unit 10 is in its maximum pivoting position away from the substrate.

Next, during the period from the eighth operating state to the twelfth operating state and then to the first operating state, the type unit 10 receives a downward force as the crank 4 rotates, contrary to the above. At this time, the curved path (a −
The cam follower 10a is guided along C), and the swing unit 12 swings counterclockwise about the swing shaft 11 while changing the distance from the swing shaft 11. Between the ninth operating state and the eleventh operating state, ink is applied from the ink roll 19 to the type surface of the type portion 10d.

This inking is possible by using the following method.

The type unit 10 d of the type unit 10 performs a pivoting motion about the pivot shaft 11 with its type face facing the ink roll 19 . Here, assuming that the distance between the pivot shaft 11 and the type surface of the type part 10d of the type unit 10 is fixed, the type part 10d with a flat type surface
In addition, when inking is performed using the cylindrical ink roll 19, it becomes necessary to move the ink roll 19 closer or further away as the type unit 10 rotates.

However, by rotating the crank 4, the cam follower 10a is guided along the curved path (a-b) of the cam groove 13a from point a to point A of the cam groove 13a. and,
At the same time as the rotation of the type unit 10 is transmitted to the rotation unit 12, the slide shaft 10c of the type unit 10 slides on the bearing 12a of the rotation unit 12, and the type unit 10 rotates. Therefore, type unit 1
0 turns, the distance between the printing surface of the printing part 10d and the rotation axis 11 changes, and printing is carried out from the cylindrical ink roll 19 while the printing part 10d is in line contact with the ink roll 19 or in a state close to it. Inking is performed on the flat type surface of portion 10d.

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

As described above, as the crankshaft 3 rotates, the type portion 10d of the type unit 10 performs the inking operation, the stamping operation, and the printing operation.
He also repeats the action of tying them together. This means that the type unit 10 rotates clockwise and rotates counterclockwise alternately. That is, during one rotation of the crank 4, the cam follower 10a moves from a to b of the cam groove 13a.
This means that the inking operation will be performed twice, clockwise and counterclockwise. To prevent this, an ink roll cam 5 is used. That is, the ink roll cam follower 17a is pressed by the rotating ink roll cam 5 to follow and operate, and as a result, the ink roll 19 swings about the support shaft 15 in synchronization with the swing movement of the type unit 10. do.

FIG. 6 shows the shape of the above-mentioned ink roll cam 5, and to explain the operation according to the shape, the state where the ink roll cam 5 and the cam follower 10a come into contact at the position A is the above-mentioned fixed position stop position. .

Between 4 and 4, as the ink roll cam 5 rotates, the ink roll 19 swings away from the type portion 10d of the type unit 10.

Between Mouth and Ha (3rd to 6th operating states in the operation description)
Now, while the type unit) 10 rotates from the printing preparation position toward the maximum rotation position, the ink roll cam follower 17a is pressed against the large diameter portion 5a of the ink roll cam 5, so that the ink roll 19 is rotated toward the hinge shaft 15. The type unit 10 is swung away from the type portion 10d of the type unit 10. Moreover, since the large diameter portion 5a has a constant radius R5, the ink roll 19 can be attached to the type unit 10.
The state where the character is away from the type portion 10d is maintained.

Between Haruji (6th to 8th operating states of operation explanation)
Now, the ink roll 19 swings so as to approach the type portion 10d of the type unit 10.

In other words, the section from the first to the second section (the second operating state to the eighth operating state in the operation description)
In the operating state), the ink roll 19 swings in a direction away from the type portion 10d of the type unit 10, or remains far away from the type portion 10d.
Since the typeface d and the ink roll 19 may come close to each other but never come into contact with each other, ink is not applied to the typeface of the type portion 10d.

Further, when the ink roll cam 5 rotates, it becomes the section 2 to E.

Between 2 and E (8th operating state to 12th operating state), the type unit 10 rotates from the maximum swing position toward the print preparation position, while the ink roll cam follower is attached to the small diameter portion 5b of the ink roll cam 5. Since 17a is pressed,
The ink roll 19 swings in the direction of the type unit 10 around the support shaft 15. Moreover, since the small diameter portion 5b has a constant radius R2, the amount of lift by the ink roll cam 5 does not change, and the ink roll 19
It maintains a position suitable for inking on the typeface of 0d. That is, in this section, as described above, the type unit 10 performs an operation for inking as shown in the ninth to eleventh operating states in the operation description, and the type surface of the type portion 10d is Ink is applied to the typeface by contacting the ink roll 19 in line contact or in a state close to it.

Between Ho and I, the lift it by the ink roll cam 5 further decreases, resulting in an operation leading to the above-mentioned fixed position stop position. During this time, the ink roll 19 is moved further from the appropriate position for inking to the type section 10d of the type unit 10.
swing towards.

As described above, as the ink roll cam 5 rotates, the ink roll 19 is moved to the escape position for not inking and to the relief position for inking, while synchronizing with the movement of the type part 10d of the type unit 10. The ink cartridge is located at the fixed position and the fixed position stop position.

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

As shown in FIGS. 3 and 4, when the type unit 10 is reciprocated by the connecting link 9, the swing unit 2 is reciprocated via the slide shaft 10c, and the swing shaft 11 is reciprocated. Here, since the swing pulley 25 is provided on the swing shaft 11 via the one-way clutch 26, the swing boob 1125 rotates only when the type unit 10 swings from the maximum swing position to the print preparation position. It does not rotate when turning from t toward the maximum turning position.

In other words, the swing pulley 25 is rotationally driven in only one direction.

Therefore, the swing pulley 25 is fixed to the swing shaft 11 only when the type unit 10 swings downward from the maximum swing position.
from the idler pulley 21 via the timing belt 27
The rotation is transmitted to and the idler gear 20 integrated with the idler pulley 21 rotates. Therefore, the ink roll gear 24 that meshes with the idler gear 2o rotates, and the ink roll 19 that rotates integrally with the ink roll shaft-y-24 rotates in the rotation direction of the rotation shaft 11 (the rotation direction of the type unit 1o).
and rotates in the opposite direction. In addition, as mentioned above, the ink roll 19
Rotation is transmitted from the rotation shaft 11 at a speed ratio of (ki):i.

According to the above configuration, electric motor 2→crankshaft 3
→ Crank 4 → Connecting link 9 → Swing unit 12 → Swing shaft 11 → One-way clutch 26 → Swing pulley 25 → Timing belt 27 → Idler pulley 21 → Idler gear 2o → Ink roll gear 24 → Ink roll 1
9 and rotation is transmitted, and moreover, the moving direction of the type portion of the type unit 10 and the moving direction of the ink roll 19 can be made to coincide with each other during inking. In short, the type unit 10 (printing member) and the ink roll 19 can be driven in synchronization only by the electric motor 2.

Furthermore, when applying ink, the speed of the printing surface of the type unit 1° and the circumferential speed of the ink roll 19 can be perfectly matched, preventing the ink roll 19 from being scratched and completely eliminating wear. can.

In addition, in this embodiment, the rotation shaft 11 and the rotation boob IJ
Although a one-way clutch 26 is provided between the support shaft 15 and the idler pulley 21, the one-way clutch 26 can also be provided between the ink roll shaft 18 and the ink roll 19. Alternatively, instead of the one-way clutch 26, the pivot shaft 11. Support shaft 15
．． For example, a one-way clutch having a ratchet mechanism may be attached to one of the ink roll shafts 18.

Further, in this embodiment, the structure is such that the reciprocating swing operation of the slidable type unit 10 is transmitted to the swing shaft 11 via the swing unit 10, but the structure is not limited to such a structure. It can be applied to any structure in which the printing member is rotated back and forth.

Furthermore, in this embodiment, the speed of the type surface of the type unit 10 and the circumferential speed of the ink roll 19 completely match; Even if they do not match, the drive mechanism of the present apparatus can be applied by allowing the type unit 10 to slide the ink roll 19 by a certain amount.

In addition, in this embodiment, the ink roll 19 has a swinging structure, but the ink roll 19 is supported by the support plate 1.
It can also be applied to the case where it is rotated while being fixed to.

〔Effect of the invention〕

As described above, according to the drive mechanism of the stamp-type printing device according to the present invention, the printing member and the ink roll are driven by one rotational drive source, and when applying ink, the circumferential speed of the ink roll and the printing member are This has the effect of completely matching the speeds of the ink rolls and eliminating wear of the ink rolls.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a drive mechanism of a stamp type printing device according to an embodiment of the present invention, FIG. 2 is a sectional view of the drive mechanism near the ink roll, and FIG. 3 is a configuration diagram of the stamp type printing device. Figure 4 is an explanatory diagram showing the relationship between the drive mechanism and the type unit, Figure 5 is a cross-sectional view of the main parts of the stamp type printing device, Figure 6 is an explanatory diagram of the shape of the ink roll cam, and Figure 7 is the rotation axis and An explanatory diagram showing the relationship between cam grooves, FIG. 8 is an explanatory diagram showing the mutual relationship between the ink roll, typeface, cam follower, and rotation axis,
Figures 9 and 10 are operation explanatory diagrams in the first operating state;
Fig. 12 is an operation explanatory diagram of the second operating state, Fig. 13,
Fig. 14 is an explanatory diagram of the operation in the third operating state, Fig. 15, and the first
6 is an explanatory diagram of the operation in the fourth operating state, FIGS. 17 and 18 are explanatory diagrams of the operation in the fifth operating state, FIGS. 19 and 20 are explanatory diagrams of the operation in the sixth operating state, FIG. Fig. 22 is an explanatory diagram of the operation in the seventh operating state, Figs. 23 and 24 are explanatory diagrams of the operation in the eighth operating state, Figs. 25 and 26 are explanatory diagrams of the operation in the ninth operating state, and Fig. 27 is an explanatory diagram of the operation in the ninth operating state. , FIG. 28 is an explanatory diagram of the operation in the tenth operating state, FIGS. 29 and 30 are explanatory diagrams of the operation in the eleventh operating state, FIGS. 31 and 32 are explanatory diagrams of the operation in the twelfth operating state, and FIG. The figure is a front configuration diagram of a conventional stamp type printing device, FIG. 34 is an explanatory diagram of the operating state of the device, and FIG.
The figure is a perspective view of the mounting block of the same device, and FIG. 36 is a rear view of the same device. 10... Type unit, 10d... Type part, 11
... Swivel axis, 12 ... Swivel unit, 15 ... Support shaft, 18 ... Ink roll shaft, 19 ... Ink roll, 20 ... Idler gear, 21 ... Idler pulley, 24 ...Ink roll gear, 25...
Swivel pulley, 26...One-way clutch, 27...
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Claims (1)

[Claims] The printing member is reciprocated about a pivot axis provided on a support plate along a path between a printing preparation position close to the printing substrate and a maximum rotation position away from the printing substrate, and ,
An ink roll that rotates in a fixed direction is installed on the support plate,
In a stamp-type printing device in which the type portion of the printing member is brought close to the ink roll twice during one cycle of the printing member, and ink is applied from the ink roll to the printing member, an ink roll gear is attached to the ink roll shaft that supports the ink roll. An idler gear and an idler pulley are rotatably provided on a support shaft fixed to a support plate, and the ink roll gear and idler gear are engaged with each other, while a pivot shaft that rotates as the printing member rotates is attached to the support plate. An idler pulley is connected to the swing pulley provided on the swing shaft via a timing belt, and a one-way clutch is further provided in the drive path from the swing shaft to the ink roll. Drive mechanism of stamp type printing device.