JPH0646707Y2 - Automatic printing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is used, for example, for imprinting printed matter such as postcards and envelopes, printing labels, and printing expiration dates on plastic bags for food packaging. The present invention relates to a relatively small automatic printer.

[Prior Art] Conventionally, an automatic printing apparatus of this type is provided with a feeding separating roller, an intermediate roller, a type roller, and the like, and the printing material is passed through the feeding separating roller and the intermediate roller and sent to the type roller. It was designed to print certain items.

However, in this case, the diameter of the type roller is small, so that the dial type character or the like cannot be internally provided, and therefore the type character is 1
Since it is necessary to set each book one by one, it takes time and labor, and because the diameter is small, the imprint area is small, and there is a problem that the printing design and the printing layout are restricted.

Therefore, it is conceivable to increase the diameter of the type roller in order to incorporate a dial type character or to widen the stamping area and the width of the print design and print layout.

[Problems to be solved by the invention] However, when the diameter of the type roller is increased, the length of one rotation of the type roller becomes longer, so the printing interval becomes longer than in the past, and the number of printed sheets per unit time decreases. There are drawbacks such as reduced work efficiency.

Further, if the surface speeds of the type roller, the intermediate roller, and the feeding separation roller are increased excessively in order to improve the work efficiency, there is a risk of damaging the material to be printed. In other words, the intermediate roller has a rotation speed of about 1.2 times the rotation speed of the rotation separation roller in order to arrange the print objects fed one by one by the rotation separation roller at a predetermined interval, but the surface speed of the rotation separation roller is increased. Then, the surface speed of the intermediate roller also rises, and the pulling force between the both rollers to the printed material increases, and at the same time, the retraction separation roller is overloaded, the separation of the printed material becomes unstable, and the thin printed material becomes thin. It can be broken.

Therefore, even if the diameter of the type roller is increased, the present invention enables printing by small prints or by lateral flow of prints without widening the printing interval, thereby increasing the print processing capacity, and further increasing the separation roller and the intermediate roller. It is an object of the present invention to provide an automatic printing device in which the difference in surface speed between the printed matter and the printed matter is small and there is no risk of damage to the printed material.

[Means for Solving the Problems] Therefore, in the present invention, in an automatic printing apparatus including a retraction separation roller for an object to be printed, an intermediate roller, and a type roller, the position of the object to be printed is placed between the intermediate roller and the type roller. A detection member, a type roller rotation angle detection member is provided on each of the type roller shafts, and a rotary shaft that interlocks with the intermediate roller shaft is provided via a gear supported by the type roller shafts. A first gear that is coupled to the type roller shaft is supported, and a second gear that meshes with the first gear and has a smaller number of teeth than the number of teeth of the first gear is supported by the type roller shaft. A first clutch mechanism for one-rotation stop control is provided between the intermediate roller shaft and the type roller shaft, and a second clutch mechanism is provided between the rotary shaft and the first gear. Is adapted to engage the gear and the type roller shaft with the detection signal of the position detecting member, and the second clutch mechanism is adapted to engage the rotating shaft and the first gear with the detection signal of the rotation angle detecting member. The present invention proposes an automatic printing device characterized by the above.

[Operation] In the present invention, when the position detection member detects the object to be printed that has passed through the intermediate roller, the rotation of the gear supported by the type roller shaft is transmitted to the rotary shaft by the first rotation stop control first clutch mechanism. The type roller begins to rotate. Next, when the type roller is rotated by a predetermined angle and printing on the printing object is completed, the second clutch mechanism connects the first gear and the rotation shaft in response to a signal from the rotation angle detection member. Since the number of teeth of the first gear is larger than the number of teeth of the intermeshing second gear, the type roller shaft on which the second gear is supported is accelerated by the gear ratio of the first gear and the second gear.

That is, in this invention, the type roller rotates at the same surface speed as the intermediate roller at the beginning of rotation to perform printing, and when the type roller finishes printing and reaches a predetermined rotation angle, the type roller rotates at an increased speed. Then, when it makes one rotation, it is stopped by the first clutch mechanism. Therefore, in the present invention, even when a type roller having a large diameter is used, the time required for the type roller to make one rotation is shortened, so that the printing interval can be shortened and the print processing capability can be improved. Also, the fact that the printing interval can be shortened means that the distance between printed materials can be shortened at the time of printing, and therefore the surface speed difference between the retraction separation roller and the intermediate roller can be small, and therefore the retraction separation can be performed. The resistance of the separating function of the rollers is also reduced, and the pulling force between the feeding separating roller and the intermediate roller on the printing material is also reduced, so that there is no risk of damage to the printing material.

[Embodiment] The present invention will be described below based on the illustrated embodiment.

Reference numeral 1 denotes an automatic printing apparatus according to an embodiment of the present invention. The automatic printing apparatus 1 is an endless belt 4 stretched by retraction separation rollers 2 and 3 and a reverse torque roller provided so as to face the retraction separation roller 2. 5 and a drive motor M for the endless belt 4
And a printing unit 10 composed of a type roller 7 and a pressure contact roller 8 provided facing the type roller 7, and between the paper feeding unit 6 and the printing unit 10. Is an intermediate roller
A pressure roller 12 is provided so as to face the intermediate roller 11 and the intermediate roller 11.

Printed materials 13 such as postcards and letter envelopes are stacked on the endless belt 4, and a guide piece 14 provided on the endless belt 4 according to the rotation of the drive motor M causes a space between the retraction separation roller 2 and the reverse torque roller 5. Sent, then one by one intermediate roller
It is sent between the pressure contact roller 12 and the pressure contact roller 12, and is sent between the type roller 7 and the pressure contact roller 12 passing therethrough.

A position detecting member 15 composed of a photocoupler for the printing material 13 is provided between the intermediate roller 11 and the type roller 7, and a rotation angle detecting member 17 of the type roller 7 is provided on a shaft 16 of the type roller 7. The rotation angle detection member 17 is, for example, a cam having a step portion 18a at a position corresponding to a rotation angle of the type roller 7 of about 180 °.
It is composed of 18 and a cam lever 19.

20 is a roller 21 rotatably supported by the type roller shaft 16.
Is a gear with a one-way bearing 22 which is provided on the outer periphery of the roller and which rotates only in one direction. The gear 20 always urges the roller 21 to rotate.

The first clutch mechanism 23 for one rotation stop control is a type roller shaft.
A roller 21 rotatably supported by 16 and a boss 16a of the type roller shaft 16 and a clutch spring 25, one end of which is fixed to the clutch cylinder 24, are interposed. Then, when the roller 21 rotates, a force acts on the clutch cylinder 24 such that the clutch cylinder 24 is biased and rotated by the clutch spring 25. However, a clutch claw 26 is provided on the outer periphery of the clutch cylinder 24, and On the clutch lever
27 is engaged and the biasing rotation of the clutch cylinder 24 is always prevented. Therefore, in this state, the clutch spring
25 is separated from the boss 16a of the shaft 16 and bulges outward, and the clutch is released. When the solenoid 28 is turned on by the signal from the position detection member 15, the clutch pawl 26 and the clutch lever 27
Is disengaged, the clutch cylinder 24 is biased and rotated, and as a result, the clutch spring 25 is fastened to the boss 16a of the shaft 16 and transmits the rotation of the roller 21 to the type roller shaft 16. A reverse rotation preventing claw 29 is provided on the outer periphery of the clutch cylinder 24, and a lever 30 is engaged with the claw 29 to prevent reverse rotation, thereby accurately determining a rotation stop position.

On the other hand, an idler gear 33 is interposed between the gear 32 fixed to the shaft 31 of the intermediate roller 11 and the gear 20, so that the rotation of the intermediate roller 11 is transmitted to the gear 20.

Further, the gear 20 urges the type roller shaft 21 to rotate, and at the same time, meshes with a gear 35 supported by a rotary shaft 34 arranged in parallel with the type roller shaft 16 to constantly rotate the rotary shaft 34. It is driving. A second clutch mechanism 37 is provided between the rotary shaft 34 and the first gear 36.

The second clutch mechanism 37 includes the boss 34a of the rotary shaft 34 and the first gear 3
It is composed of a boss 36a fixed to 6 and a clutch spring 39 which is interposed between the clutch barrel 38 and one end of which is fixed to the clutch barrel 38. Ratchet lever to engage
41 is provided. The ratchet lever 41 and the cam lever 19 of the rotation angle detecting member 17 are connected by a connecting rod 42, and the engagement / release of the ratchet 40 and the ratchet lever 41 is controlled by the vertical movement of the cam lever 19. Cam lever 19 when the type roller shaft 16 is stopped
Is descending, the ratchet 40 and the ratchet lever 41 are engaged, the second clutch mechanism 37 is released, and the rotating shaft 34
Although rotating, the first gear 36 is stopped.

Therefore, as described above, when the printing material 13 that has passed between the intermediate roller 11 and the pressure contact roller 12 reaches a predetermined position, the position detection member 15 outputs a detection signal and operates the solenoid 28 to operate the clutch lever 27. When the clutch pawl 26 is disengaged and the first clutch mechanism 23 is engaged, the rotation of the gear 20 is transmitted to the type roller shaft 16, so that the type roller 7 rotates at a surface speed equal to that of the intermediate roller 13 to be printed. Print on top.

Further, when the printing roller 7 rotates by 180 °, for example, to finish printing, the cam lever 19 rises at the step portion 18a, whereby the clutch lever 41 releases the clutch 40 and the boss 34a.
The clutch barrel 38, to which the rotational biasing force is applied via the clutch spring 39, is biased and rotated. Then, the first gear 36 rotates the second gear 44 supported by the type roller shaft 16 via the one-way bearing 43. Here, assuming that the number of teeth of the first gear 36 is 40T and the number of teeth of the second gear 44 is 20T, the type roller shaft 1 on which the second gear 44 is supported is
6 is increased to double the rotation speed.

In other words, when the position detection member 15 detects the printing object 13, the type roller 7 starts to rotate at a surface speed equivalent to that of the intermediate roller 11 to perform printing, and the type roller 7 rotates 180 ° to finish printing. The first gear 36 is detected by the detection of the angle detecting member 17.
Urges the second gear 44 to rotate, and the type roller 7 is accelerated by the gear ratio of the first gear 36 and the second gear 44. Therefore, the printing roller can return to a predetermined position at high speed after printing is completed.

[Effect of the Invention] As described in detail above, in the present invention, even when a large-diameter type roller is used due to an extremely simple mechanical structure, at first, the type roller is rotated at a low speed for printing, and printing is performed. When is finished, it will return to the specified position at high speed.
The printing interval can be shortened and printing can be performed by printing a small printed material or by laterally flowing the printed material, thus improving the print processing efficiency. Further, since the printing interval is shorter than that of the conventional automatic printing device, it is possible to reduce the surface speed difference between the feeding separation roller and the intermediate roller provided in the preceding stage of the printing roller, and therefore the printing material The pulling force is suppressed, and the risk of damage to the printed material is eliminated.

By increasing the diameter of the type roller, it is possible to install a date stamp or numbering dial type character inside the type roller, which makes setting of the type extremely easy, and by enlarging the stamp area. It is possible to widen the width of the print design and print layout.

[Brief description of drawings]

FIG. 1 is a side view of an automatic printing apparatus showing an embodiment of the present invention, FIG. 2 is a plan view of relevant parts of the same, FIG. 3 is a side view showing a first clutch mechanism of the same, and FIG. It is a side view which shows a rotation angle detection member and a 2nd clutch mechanism same as the above. 1 ... Automatic printing device, 2 ... Retracting separation roller, 7 ...
… Type roller, 11 …… Intermediate roller, 15 …… Position detecting member, 16 …… Type roller shaft, 17 …… Rotation angle detecting member, 23…
… First clutch mechanism, 34 …… Rotary shaft, 36 …… First gear,
37 …… Second clutch mechanism, 44 …… Second gear

Claims (2)

[Scope of utility model registration request] 1. An automatic printing apparatus comprising a print separation roller, an intermediate roller, and a type roller for a printed material, wherein a position detecting member for the printed material is provided between the intermediate roller and the type roller, and the type roller shaft is provided. A type roller rotation angle detection member is provided, and a rotary shaft that interlocks with the intermediate roller shaft is provided via a gear supported by the type roller shaft, and the rotary shaft is connected to the type roller shaft with a first gear. A second gear having a number of teeth smaller than the number of teeth of the first gear by meshing with the first gear and the type roller shaft, and the intermediate roller shaft and the type roller shaft. A first clutch mechanism for one rotation stop control, a second clutch mechanism between the rotating shaft and the first gear, and the first clutch mechanism uses the detection signal of the position detecting member to detect the Gear and life A roller shaft engages, an automatic printing device second clutch mechanism being characterized in that so as to engage with said rotary shaft and the first gear in the detection signal of the rotation angle detecting member. 2. The automatic printer according to claim 1, wherein the gear and the second gear supported by the type roller shaft are supported by the type roller shaft via a one-way rotating member.