JPH0615256B2 - Stamp type printer drive mechanism - 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 drive mechanism of a stamp type 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 (No. 33). (Figures 36 to 36).

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

As shown in FIGS. 35 and 36, 37 is a mounting block, which is supported by a spring 39 on a housing 39 and is fixed to the housing 39 by a slide shaft 40.
Is designed to slide up and down. The printing member 36 is mounted on the mounting block 37 so as to be rotatable about a shaft 41.

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

Cam follower arm 4 integrated with the ink roll device 42
4, a 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 structure, the printing member 36 repeatedly reciprocates,
As a result, the character portion 36a of the printing member 36 twice comes close to the ink roll 42a during one cycle movement of the printing member 36.

FIG. 34 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, the printing member 3 that revolves around the shaft 41
When 6 comes into contact with the stopper 37a of the mounting block 37,
The printing member 36 together with the mounting block 37 is attached to the slide shaft 4
Operates at right angles to substrate A along 0. That is,
Like the locus X, the circular motion discontinuously makes a linear motion. 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 drive system of the conventional printing apparatus, the drive motor 33 for rotating the printing member 36 and the ink roll motor 4 for rotating the ink roll 42a.
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 an object thereof is to provide a drive mechanism of a stamp-type printing apparatus that drives a printing member and an ink roll with a single rotary drive source.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention prints along a path between a print preparation position close to a printing material and a maximum turning position distant from the printing material, centering on a turning axis provided on a support plate. The support plate is provided with an ink roll that rotates the member back and forth and rotates in a certain direction, and the type portion of the secondary printing member is brought close to the ink roll during one cycle movement of the printing member, and ink is transferred from the ink roll to the printing member. In a stamp-type printing apparatus that attaches an ink roll gear to an ink roll shaft that supports an ink roll, an idler gear and an idler pulley are rotatably provided on a support shaft fixed to a support plate. While meshing with the idler gear, the swivel shaft that swivels when the printing member swivels is rotatably supported by the support plate. An idler pulley is connected to the pulley via a timing belt, and a one-way clutch is provided in the drive path from the turning shaft to the ink roll.

[Operation of the invention]

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

Since the one-way clutch is provided on the drive path from the swivel shaft to the ink roll, rotation of the printing member in only one direction from the swivel shaft to the ink roll is possible only when the printing member swivels from the maximum swivel position toward the print preparation position. The ink is transmitted through the drive path, and the ink rolls sequentially rotate in the same direction. The moving direction of the ink roll is the same as the moving direction of the print part when the printing member turns from the maximum turning position to the print preparation position direction.

Example of Invention

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

1 to 5 show a driving mechanism of a stamp type printer according to an embodiment of the present invention.

In FIG. 3, 1 is a support plate, on the front side of which the respective components shown in FIG. 3 are attached, and on the rear side thereof the respective components shown in FIG. An attachment member 1a and a protective cover (not shown) for attaching the components shown in FIG. 3 are also attached to the support plate 1.

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

Reference numeral 3 denotes a crankshaft that penetrates the support plate 1, and is rotatably supported by a first bearing 1b provided on the mounting member 1a.
It is adapted to be rotated by the 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. 6, the ink roll cam 5 is a substantially circular plate body, and the peripheral portion of the ink roll cam 5 is a-ro, a ro-ha, a-ni, a ni-ho,
It is divided into sections from Ho to I. Section from B to C (angle θ
_{In 2} ), the large diameter part 5a having a constant radius R ₁ is formed. In Ha ~ two sections, gradually decreases from the constant radius R _1, becomes the radius R ₂ in terms of two, small diameter portion 5b having a constant radius R ₂ in the two-E section (angle theta ₁₎ Has been formed. At point a, a groove 5c that is sharply recessed is formed.

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

Reference numeral 9 is a connecting link, which is a link bearing 9 provided at one end thereof.
The crank pin 4a is supported by a, the type unit pin 10b is supported by the link bearing 9b provided at the other end,
The crank pin 4a and the type unit pin 10b are fixed to the crank 4 and the type unit (printing member) 10, respectively. 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 a 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. However, it has a flat print part 10d on the other end side. The character 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 heater and a temperature detector (not shown) built therein to keep the type portion 10d at a constant temperature.

Reference numeral 11 denotes a swivel shaft that penetrates the support plate 1 and is rotatably supported by a second bearing 1c provided on the support plate 1. Swivel axis 1
The swivel unit 12 is fixed to the front side of the first support plate 1. The swivel unit 12 includes a slide bearing 12
a is provided at two places, and slidably supports a slide shaft 10c fixed to the type unit 10. That is, the swivel unit 12 slidably supports the type unit 10. A turning pulley 25 is provided on the rear side of the support plate 1 of the turning shaft 11.

Reference numeral 13 denotes a cam plate fixed to the support plate 1 and provided with a cam groove 13a for guiding the cam follower 10a. The shape of the cam groove 13a will be described later.

Reference numeral 14 denotes an inking device for inking the type portion 10d, which includes a support shaft 15 penetrating the support plate 1 and fixed to the support plate 1, and a roll plate 16 rotatably provided on the support shaft 15. The roll plate 16 includes a follower arm 17 provided on one end side, an ink roll shaft 18 provided on the other end side of the roll plate 16, and an ink roll 19 integrally attached to the ink roll shaft 18. ing. To explain 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 is a cam follower 1 for the ink roll by rotation of the ink roll cam 5.
It serves to change the displacement of 7a into the swinging motion of the roll plate 16 about the support shaft 15. Hit amount adjustment mechanism 17b
Is for adjusting the attachment angle of the follower arm 17 attached to the roll plate 16, and by this mechanism,
It is possible to adjust the amount of contact between the print surface and the ink roll 19 when applying ink 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 15 by the roll plate bearing 15a. Further, an idler gear 20 and an idler pulley 21 are integrally attached to the rear surface side of the support shaft 15 via an idler bearing 15b with the shaft being common, and are 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 17 a against the ink roll cam 5.

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

The ink roll shaft 18 passes through the support plate 1 and is rotatably supported by an ink roll bearing 18a attached to the roll plate 16. In the portion of the support plate 1 through which the ink roll shaft 18 penetrates, a hole 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 swing of the roll plate 16. 1d is open. 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 obtained by impregnating a heat-melting ink into an open-cell sponge, 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 one-way clutch 26 is press-fitted in the center of the turning pulley 25 provided on the rear side of the support plate 1 of the turning shaft 11. The one-way clutch 26 transfers the repetitive rotational movement of the revolving shaft 11 to the revolving pulley 25 in a brownish manner 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. Here, the rotation speed of the ink roll 19 is given by the following formula: ink roll rotation speed≈rotation axis rotation speed × (k−i) ÷ i.

Here, k: distance between the center of the ink roll and the center of the swivel axis i: radius of the ink roll Therefore, by appropriately combining the radii of the swivel pulley 25 and the idler pulley 21, the number of teeth of the idler gear 20 and the ink roll gear 24, Ink roll 1
The speed (including the direction) of the printing surface of the printing portion 10d when the ink is applied from 9 to the printing portion 10d matches the peripheral speed of the ink roll 19.

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

As shown in FIG. 7, the cam groove 13a is a substantially crank-shaped path, and the curved path (ab) through which the type unit 10 passes near the ink roll 19 and this curved path (a-b).
b) and a straight route (c to d) via the route (b to c). The straight line paths (c to d) are perpendicular to the material to be printed, and the center of the turning shaft 11 is located on the extension line.

In FIG. 8, when ink is applied, the print character portion 10d
It is necessary to contact the ink roll 19 in a line contact state in which the print surface of the above type does not dig into the surface of the ink roll 19 and does not separate, or in a state close to that. 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 condition, the cam groove 13a is formed. The route is obtained as shown in FIG. 8 as follows.

L _c for the turning angle θ is given by L _c = L−L _f = _C cos θ−r−L _f .

The rotation angle 2θ required for ink attachment when the printing surface length is L _t is Given in.

Here, L _c : Distance from center of cam follower 10a to center of swivel axis 11 (variable) L _t : Typeface length C: Distance from center of ink roll to center of swivel axis 11 (fixed value) L: Distance from print surface to center of swivel shaft 11 (variable) L _f : Distance from print surface to center of cam follower 10a (fixed value) θ: Swivel angle r: Ink roll radius Cam groove 13a satisfying the above conditions Is a path formed by the curved lines (a to b). When the ink is applied to the type portion 10d of the type unit 10 passing near the ink roll 19, the type portion 10d comes into line contact with the ink roll 19 or therewith. They come into contact with each other in a close state.

Next, the operation of this embodiment will be described with reference to FIGS. 9 to 32.

FIGS. 9 and 10 show the first operating state, and FIGS.
The figure shows the second operating state, FIGS. 13 and 14 show the third operating state, and FIGS. 15 and 16 show the fourth operating state.
FIGS. 18 and 19 show the fifth operating state, FIGS. 19 and 20 show the sixth operating state, FIGS. 21 and 22 show the seventh operating state, and FIGS. 23 and 24 show the eighth operating state. The operating state is shown in FIG.
FIG. 26 shows the ninth operating state, and FIGS. 27 and 28 show the first operating state.
0 operating state, FIGS. 29 and 30 show 11th operating state, FIGS. 31 and 32 show 12th operating state, and
The two operating states are returned to the first operating state, and a series of cycles are performed.

Figures 9, 11, 13, 13, 15, 17, 19, 21, 23, 25, 27, 29, and 31 are mainly The movement of the type unit 10 and the turning unit 12 is shown. 10, FIG. 12, FIG. 14, FIG. 14, FIG. 16, FIG. 18, FIG. 20, FIG. 20, FIG. 22, FIG. 24, FIG. 26, FIG. 28, FIG.
The movements of the cam follower 10a and the inking device 14 on the cam plate 13 are mainly shown.

In FIGS. 1 and 3, the electric motor 2 rotates when energized. Motor pulley 2 attached to the motor shaft 2a
The rotation of b is decelerated and transmitted to the crank pulley 6 via the motor timing belt 8. Crank pulley 6
The rotation of the crankshaft rotates the crankshaft 3 fixed to the clamp pulley 6. The crank 4, the ink roll cam 5, fixed to the crank shaft 3 by the rotation of the crank shaft 3,
The slit plate 7 also rotates.

By rotating the slit plate 7, the slit 7a
Passes through the phototube sensor 7b. At that time, the photoelectric tube 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. Regarding the position of the slit 7a of the slit plate 7, when the slit plate 7 passes the phototube sensor 7b, the positions of the crank 4 and the ink roll cam 5 are in the first operation state (cam follower 1
0a corresponds to the position of the cam groove 13a at the point c).

The control circuit starts energizing the electric motor 2 by receiving a marking start signal from the outside, and the photoelectric tube sensor 7
Upon receiving the signal from b, the electric power to the electric motor 2 is cut off. 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 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 5c. Therefore, the ink roll 1
9 is the position that is the closest to the printed character portion 10d by swinging a maximum amount around the hinge shaft 15. When the crankshaft 3 rotates in this state, the displacement amount of the ink roll cam follower 17a by the ink roll cam 5 increases regardless of whether the crankshaft 3 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 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 rotated slightly to the right or left from the first operating state, a force is always exerted to return to the stopped state.

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, since the cam follower 10a of the type unit 10 is guided by the straight line portions (c to d) of the cam groove 13a of the cam plate 13, the revolving unit 12 does not rotate (the cam groove shown in FIG. 7). (The extension line of the straight line portion of c to d of 13a passes through the center of the swivel shaft 11). Therefore, the type unit 10 slides its slide shaft 10c on the slide bearing 12a of the revolving unit 12 and linearly moves 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 followers 10
a reciprocates in the linear portion (c to d) of the cam groove 13a.

Further, when the crank 4 rotates from the third operating state, the type unit 10 is pulled upward through the connecting link 9, and the fourth operating state → fifth operating state → sixth operating state →
Proceeds from the seventh operating state to the eighth operating state. That is, the cam groove 1
Cam follower 10a along the curved path (c-b) of 3a
Is guided, and the revolving unit 12 revolves clockwise about the revolving shaft 11 while changing the distance from the revolving shaft 11. In other words, the rotation of the type unit 10 is transmitted to the swivel unit 12, and at the same time, the type unit 10 is rotated.
Slide shaft 10c is a bearing 12a of the turning unit 12.
It makes a turning motion while sliding. When the crank 4 reaches the top dead center, the eighth operation state is set, and the type unit 10 is at the maximum turning position away from the printed material.

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 curved path of the cam groove 13a (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. Ink is applied from the ink roll 19 to the character surface of the character 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 type face of the type portion 10d of the type unit 10 is fixed, the type portion 10d having a flat type face.
In addition, when ink is applied using the cylindrical ink roll 19, 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, at the same time as transmitting the rotation of the type unit 10 to the swivel unit 12, the slide shaft 10c of the type unit 10 slides on the bearing 12a of the swivel unit 12, and the type unit 10 makes a swivel motion. Therefore, as the type unit 10 turns, the distance L between the type face of the type portion 10d and the swivel shaft 11 changes, and the type portion 10d makes linear contact with the ink roll 19 in a state of being in line contact or close to that, and the cylindrical ink. Ink is applied from the roll 19 to the flat character surface of the character portion 10d.

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

As described above, as the crankshaft 3 rotates, the type portion 10d of the type unit 10 causes the inking operation, the marking operation,
Also, the operation of connecting them is repeated. This means that the operation of the type unit 10 turning clockwise and the operation of turning counterclockwise are alternately repeated. In other words, while the crank 4 makes one rotation, the cam follower 10a passes between a and b of the cam groove 13a twice, clockwise and counterclockwise, and the inking operation occurs twice. It will be. 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 to follow and operate, whereby the ink roll 19 swings around the support shaft 15 in synchronism with the turning motion of the type unit 10. do.

FIG. 6 shows the shape of the ink roll cam 5 described above, and the operation according to the shape will be described. The state where the ink roll cam 5 and the cam follower 10a contact at the position a is the fixed position stop position described above. .

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

Between B and C (third operating state to sixth operating state)
Then, while the type unit 10 is swung from the print preparation position toward the maximum swivel 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 moves toward the hinge shaft 15. It swings in a state away from the type portion 10d of the type unit 10 as the center. Moreover, since the large diameter portion 5a has a constant radius R ₁ , the ink roll 19 is not
The state of being far from the character type portion 10d is retained.

Between C and D (Sixth operating state to eighth operating state)
Then, the ink roll 19 is swung so as to approach the type portion 10d of the type unit 10. That is, in the section from R to D (the second operation state to the eighth operation state of the operation description), the ink roll 19 is the type unit 1 of the type unit 10.
It swings in a direction away from 0d or stays away from it, and during this period, the printing surface of the printing portion 10d and the ink roll 19 do not come into contact with each other, but the printing surface of the printing portion 10d does not touch. No ink is applied to the surface.

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), while the type unit 10 pivots from the maximum swing position toward the print preparation position, 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 is constant radius R _2, the lift amount of the ink roll cam 5 does not change, the ink roll 19, print unit 1
It holds the state of a position suitable for applying ink to the printing surface of 0d. That is, in this section, as described above, the type unit 10 performs the operation for inking as shown in the ninth operation state to the eleventh operation state of the operation description, and the typeface of the typeface portion 10d is Ink is applied to the printing surface by contacting the ink roll 19 with a line contact or a state close thereto.

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 further swings 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 character portion 10d of the type unit 10, and the ink roll 19 is provided at an escape position where ink is not applied and at which ink is applied. It is located at the inking position and the fixed position stop position.

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

As shown in FIGS. 3 and 4, 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 11 is provided on the turning shaft 11 via the one-way clutch 26, the turning pulley 25 rotates only when the type unit 10 turns from the maximum turning position to the print preparation position, and the print preparation position. Does not rotate when turning from the direction of maximum turning position. That is, the turning pulley 25 is rotationally driven only in one direction. Therefore, only when the type unit 10 turns 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 gear integrated with the idler pulley 21 is transmitted. 20 rotates. Therefore, the ink roll gear 24 that meshes with the idler gear 20 rotates, and the ink roll 19 that rotates integrally with the ink roll gear 24 rotates the swivel shaft 1.
It rotates in the opposite direction to the rotation direction of 1 (the turning direction of the type unit 10). As described above, the ink roll 19 has
Rotation is transmitted from the turning shaft 11 at a speed ratio of (k-i): i.

According to the above configuration, the electric motor 2 → the 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 20 → ink roll gear 24 → ink roll 1
9 and rotation are transmitted, and at the time of ink application, the moving direction of the type portion of the type unit 10 and the moving direction of the ink roll 19 can be matched. In short, the type unit 10 (printing member) and the ink roll 19 can be driven in synchronization with each other only by the electric motor 2.

Further, at the time of applying ink, the speed of the typeface of the type unit 10 and the peripheral speed of the ink roll 19 can be made to completely match, the scratching of the ink roll 19 can be prevented, and the wear can be completely eliminated. .

In addition, in the present embodiment, the turning shaft 11 and the turning pulley 2
Although the one-way clutch 26 is provided between the support shaft 15 and the idler pulley 21, the one-way clutch 26 may be provided between the support shaft 15 and the idler pulley 21 and between the ink roll shaft 18 and the ink roll 19. Alternatively, instead of the one-way clutch 26, the swing shaft 11, the support shaft 15,
A one-way clutch having, for example, a ratchet mechanism can be mounted in the middle of any of the ink roll shafts 18.

Further, in the present embodiment, the structure is such that the reciprocating swivel operation of the slidable type unit 10 is transmitted to the swivel shaft 11 via the swivel unit 12, but the present invention is not limited to such a structure, and the swivel shaft 11 is mainly used. Can be applied to all structures in which the printing member is reciprocally rotated.

Further, in the present embodiment, the speed of the printing surface of the type unit 10 and the peripheral speed of the ink roll 19 are completely the same, but the speed of the printing surface of the type unit 10 and the peripheral speed of the ink roll 19 are the same. Even if they do not match, the drive mechanism of this apparatus can be applied by sliding the ink roll 19 slightly by the type unit 10.

In addition, in this embodiment, the ink roll 19 is structured to swing, but the ink roll 19 is supported by the support plate 1.
The present invention can also be applied to the case where it is rotationally driven in a state of being fixed to.

〔The invention's effect〕

As described above, according to the drive mechanism of the stamp type printer according to the present invention, the printing member and the ink roll are driven by one rotation drive source, and at the time of applying ink, the peripheral speed of the ink roll and the printing member. There is an effect that the wear of the ink roll can be eliminated by completely matching the speeds of.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a drive mechanism of a stamp type printing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of an ink roll of the drive mechanism, and FIG. 3 is a configuration diagram of the stamp type printing apparatus. FIG. 4 is an explanatory view showing the relationship between the drive mechanism and the type unit, FIG. 5 is a sectional view of a main part of the stamp type printer, FIG. 6 is an explanatory view of the shape of the ink roll cam, and FIG. FIG. 8 is an explanatory view showing the relationship of the cam grooves, FIG. 8 is an explanatory view showing the interrelationship of the ink roll, the printing surface, the cam follower, and the swivel axis, and FIGS. 9 and 10 are operation explanatory views of the first operating state. 11 and 12 are operation explanatory views of the second operation state, and FIG.
14 and 15 are explanatory diagrams of operation in the third operation state, FIG.
FIG. 16 is an operation explanatory view of the fourth operation state, FIG. 17, and FIG.
FIG. 8 is an operation explanatory view of a fifth operating state, FIGS. 19 and 20 are operation explanatory views of a sixth operating state, FIGS. 21 and 22 are operation explanatory views of a seventh operating state, FIG. 23, FIG. 24 is an operation explanatory view of the eighth operating state, FIGS. 25 and 26 are operation explanatory views of the ninth operating state, FIGS. 27 and 28 are operation explanatory views of the tenth operating state, and FIG. 29. , FIG. 30 is an operation explanatory view of the 11th operation state, FIGS. 31 and 32 are operation explanatory views of the 12th operation state, FIG. 33 is a front configuration diagram of a conventional stamp type printer, and FIG. FIG. 35 is a perspective view of a mounting block of the device, and FIG. 36 is a rear view of the device. 10 …… Type unit, 10d …… Type part, 11 ……
Swivel axis, 12 ... Swivel unit, 15 ... Support axis, 18
Ink roll shaft, 19 Ink roll, 20
Idler gear, 21 ... Idler pulley, 24 ...
... Ink roll gear, 25 ... turning pulley, 26 ... one-way clutch, 27 ... timing belt.

Claims (1)

[Claims] 1. A printing member is reciprocally swiveled about a swivel axis provided on a support plate along a path between a print preparation position close to the print object and a maximum swivel position away from the print object. A stamp-type printing apparatus in which an ink roll that is rotationally driven in a fixed direction is provided on a support plate, and the type portion of the printing member is twice brought close to the ink roll during one cycle movement of the printing member, and ink is applied from the ink roll to the printing member. In, the ink roll shaft that supports the ink roll is integrally provided with an ink roll gear, the support shaft fixed to the support plate is provided with an idler gear and an idler pulley rotatably, and the ink roll gear and the idler gear are meshed with each other, On the other hand, a swivel shaft that swivels as the printing member swivels is rotatably supported on a support plate, and a timing belt is attached to a swivel pulley provided on this swivel shaft. A stamp-type printing apparatus drive mechanism characterized in that an idler pulley is connected via an idler pulley, and a one-way clutch is provided in the drive path from the rotary shaft to the ink roll.