JPH0129089Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutter drive device for a printer.

The recording paper cutting device of conventional printers uses a means to switch between full cut and partial cutting by interlocking with the stamp drive unit, so the layout design of the recording paper cutting device and stamp device is fixed and there is no flexibility. Ta. Moreover, for this reason, a unitized structure was not possible, and the stamp printing and recording paper cutting positions were limited, making it impossible to cut at an arbitrary position. In addition, since it was impossible to configure the unit, adjustments were required in the assembly process, and the assembly required a considerable amount of time.

The purpose of this invention is to drive a cutter that eliminates the need for any troublesome adjustment work when performing complete and partial cutting of recording paper, suppresses variations in the operating stroke of the cutter blade, and achieves accurate cutting of recording paper. The purpose is to provide equipment.

To this end, the present invention provides a cutter drive device for a printing press that includes a cutter blade for cutting recording paper and a cutter lever that operates the cutter blade using a cam member. a cam gear whose position is regulated by the first trigger means; a cam gear whose position is regulated by the second trigger means;
a cam member whose position is regulated by the second trigger means; a biasing means for urging the cam gear in a direction to engage the first trigger means; and a drive gear for driving the cam gear; The cam gear includes a continuously formed tooth portion and a toothless gear portion,
The cutter lever includes a stop portion formed on a side surface and engaged with the first trigger means, and a cam portion that controls the amount of drive of the cutter lever, and the cam member is engaged with and positioned with the second trigger means. and a cam portion for controlling the drive amount of the cutter lever, the cam gear and the cam member are disposed adjacent to each other, and a portion thereof includes a concave-convex joint portion forming a clutch, and When the rotation stopper is released by actuating the first trigger means, the cam gear rotates by a predetermined angle under the action of the urging means, so that the gear meshes with the drive gear,
a position where the cutter blade partially cuts the recording paper by the cam portion of the cam member, which operates the cutter lever along the cam portion of the cam gear and is stopped by the second trigger means; When the amount of drive of the cutter lever is regulated so that the cutter lever is driven up to a maximum of 100 degrees, and the first and second trigger means are actuated simultaneously to release the rotation stop, the cam gear and the cam member The cam gear and the cam portion of each of the cam members are configured to rotate the cutter lever to a position where the cutter blade completely cuts the recording paper.

This will be explained in detail below using the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIGS. 2 to 5 are partial views thereof.

The drive gear 2 fixed to the drive shaft 1 is a transmission gear 4
The transmission gear 4 is rotatably supported by the transmission shaft 3 fixed to the subframe 17. The transmission gear 4 is integrally provided with a cam part 4-3 having a tooth groove 4-2 divided into n parts, and a gear part 4-1 having a tooth height equal to or less than the lead of the cam part 4-3. There is. The cam gear 6 rotatably supported on the cutter camshaft 5 has a toothed portion 6-5 partially having a notch 6-5.
6, per unit cam part A6-1, cutter lever 1
cam part 6-2 that engages with 5, side protrusion part 6-3
are integrated, and the perpendicular cam portion A6-1 is locked by a trigger lever A10. The cam wheel 7 has a convex cam portion 7-1 on the side surface, and a perpendicular cam portion B7-1 that engages with the trigger lever B13.
2. The outer cam portion 7-3 is integrally provided.
The cam gear 6 and the cam wheel 7 are pressed into engagement by a compression spring 8, with the projection 6-3 and the convex cam 7-1.
When the trigger magnet A9 is energized, the trigger lever A10 is attracted against the spring 11, and the engagement between the trigger lever A10 and the percussion cam portion A6-1 is disengaged, and when the trigger magnet B12 is energized, the trigger lever B13 is released from the spring. 14, and the engagement between the trigger lever B13 and the percussion cam portion B7-2 is disengaged. A cutter lever 15 rotatably supported by the transmission shaft 3 is biased by a cutter lever spring 16 so as to engage with the cam portion 6-2. The cutter 18 is supported so as to be slidable in the direction of the arrow by left and right cutter guide shafts 21, and is driven by the cutter lever 15 to cut the recording paper 22.

Next, the operating principle will be explained. When the rotational power of the continuously rotating drive gear 2 is transmitted to the transmission gear 4 by a driving means such as a motor, the transmission gear 4 continuously rotates. The transmission gear 4 and the cam gear 6 have a Geneva configuration, and when the trigger lever A10 and the perpendicular cam part A6-1 are perpendicularly engaged as shown in FIG. The gear portion 4-1 faces each other, and the cam gear 6 does not rotate. When the trigger magnet A9 is energized, the percussion engagement between the trigger lever A10 and the perforation cam portion A6-1 is disengaged, and the cam gear 6 is pressed against the cutter lever 15 as shown in FIGS. 4 and 5. Since the cam part 6-2 is engaged and pressed at a position shifted by θ° with respect to the center of the gear 6, rotational torque is generated in the direction of the arrow, and the tooth part 6-7 of the cam gear 6 continuously rotates. Transmission gear 4
When the cam part 4-3 rotates in the direction of the arrow in the state of contacting and engaging with the lead part of the cam part 4-3, and the n-divided tooth groove 4-2 part rotates to the tooth part 6-7 of the cam gear 6, the cam part 4-3 rotates in the direction of the arrow. The cam gear 6 is rotated in the direction of the arrow by receiving the power transmitted from the continuously rotating transmission gear 4 that meshes with the teeth 6-7. At this time, by adjusting the energization time of the trigger magnet A9, intermittent rotation or continuous rotation is possible. Next, cam wheel 7
Regarding the transmission of rotation to the cam wheel 7, the protrusion 6-3 of the cam gear 6 is engaged with the notch 7-5 of the convex cam 7-1 of the cam wheel 7, which is pressed by the compression spring 8. When the trigger magnet B12 is not energized, the cam wheel 7 does not rotate even if the cam gear 6 rotates because the trigger lever B13 and the perpendicular cam part B-7-2 are perpendicularly engaged. Without moving the compression spring 8 in the direction of the arrow, the projection 6-3 of the cam gear 6 comes out of the notch 7-5 of the cam wheel 7, slides on the surface of the convex cam 7-1, and the cam gear 6 only rotates. At this time, the cutter lever 15 falls from the highest point of the lead of the cam portion 6-2 and hits the outer periphery cam portion 7-3 of the cam wheel 7. At this time,
The stroke of the cutter lever 15 becomes a partial cut stroke, and the cutter 18 is driven by the cutter lever 15 to partially cut the recording paper 22.

Next, the case where the trigger magnets A9 and B12 are energized simultaneously will be explained. Trigger magnet A
When 9 and B12 are energized at the same time, trigger lever A1
0 and B13 are the perpendicular cam part A6 of each cam gear
-1 and the perpendicular cam portion B7-2 of the cam wheel 7 are disengaged, and the cam gear 6 engages with the continuously rotating transmission gear 4 and rotates in the direction of the arrow. The cam wheel 7 also rotates integrally with the cam gear 6 in the direction of the arrow because the projection 6-3 of the cam gear 6 is engaged with the notch 7-5 of the cam wheel 7. Trigger magnet A
By adjusting the energization time of 9 and B12, the trigger levers A10 and B13, the per-degree cam part A6-1, and the per-degree cam part B7-2 are perpendicular to each other for each rotation of the cam gear 6 and the cam wheel 7, resulting in intermittent rotation. Also, continuous rotation is possible. At this time, the cutter lever 15 is attached to the cam portion 6 of the cam gear 6.
-2 and the highest point of the lead to the lowest point of the lead 6-4
The cutter lever 15 at this point falls to the position of
The stroke is the stroke at full cut. Since the lowest point of the outer cam portion lead of the cam wheel 7 has a smaller cam diameter than the lowest point 6-4 of the cam lead of the cam gear 6, the pressing load of the cutter lever 15 is not transmitted to the cam wheel 7. The cam wheel 7 is rotatable. As shown above, trigger magnet A
By selecting energization to 9 and B12, it is possible to generate a full cut stroke and a partial cut stroke, which engages a part of the cutter lever 15 as shown in FIG. A cutter 18 constituted by a cutting plate 20 and a cutter guide shaft 21 cuts a recording paper 22.

As explained above, according to the present invention, when partial cutting of the recording paper is performed using the cam gear, the cam member, and the first and second trigger means that are collectively arranged on one side of the frame, the first This is done by releasing the restriction on the position of the cam gear by the first trigger means and rotating only the cam gear, and when the recording paper is to be completely cut, the first and second trigger means are actuated simultaneously. Since the configuration is such that the positional restrictions of the cam gear and the cam member are released and the cam member is rotationally driven by the rotation of the cam gear, the position and coupling relationship between the cam gear and the cam member, as well as the cam gear and the There is no need to adjust the respective positions, engagement amounts, etc. of the first trigger means, the cam member, and the second trigger means, and there is no variation in the operating stroke of the cutter blade.
Accurate complete and partial cutting of recording paper is possible. Furthermore, since the cam gear, which also serves as a part of the drive wheel train for driving the cutter blade, is configured to restrict its position so that it rotates and stops intermittently by the first trigger means, the cam gear Since it forms part of the drive wheel train and can also be used as a functional component for driving the cutter blades, it is possible to reduce the number of components, improve the efficiency of power transmission, and provide a cutter drive device with high responsiveness.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a recording paper cutting device of a printer according to the present invention, FIG. 2 is a partial sectional view of an embodiment of the present invention, FIGS. 3 and 4 are partial perspective views, and FIG. FIG. 1... Drive shaft, 2... Drive gear, 4... Transmission gear, 6... Cam gear, 9... Trigger magnet A, 10... Trigger lever A, 12... Trigger magnet B, 13... Trigger lever B, 1
5...Cutter lever, 18...Cutter, 22
……Recording paper.

Claims (1)

[Scope of utility model registration request] In a cutter drive device for a printing press, which includes a cutter blade for cutting recording paper and a cutter lever that operates the cutter blade by a cam member, a first trigger means and a second trigger means are electromagnetically operated. , a cam gear whose position is regulated by the first trigger means, a cam gear whose position is regulated by the second trigger means, a cam member whose position is regulated by the second trigger means, and a cam gear whose position is regulated by the first trigger means. a biasing means for biasing in a direction to engage the trigger means of the cam gear, and a drive gear for driving the cam gear;
The cam gear includes a toothed portion and a toothless gear portion that are continuously formed, a contact portion that is formed on a side surface and engages with the first trigger means, and a cam portion that controls the amount of drive of the cutter lever. The cam member includes a contact portion that engages and positions the second trimmer means, and a cam portion that controls the amount of drive of the cutter lever, and the cam gear and the cam member are adjacent to each other. The cam gear has a concave-convex joint that partially constitutes a clutch, and when the first trigger means is actuated to release the rotation stopper, the cam gear is moved to a predetermined position under the action of the biasing means. Angular rotation causes the gear to mesh with the drive gear, actuating the cutter lever along the cam portion of the cam gear and stopping the cutter lever by the second trigger means. When the amount of drive of the cutter lever is regulated by the cam part so that the cutter blade is driven to a position where it partially cuts the recording paper, and the first and second trigger means are actuated simultaneously to release the rotation stop; The cam gear and the cam member rotate integrally due to the combination of the concavo-convex joint, and each cam portion of the cam gear and the cam member is positioned at a position where the cutter blade completely cuts the recording paper. A cutter drive device for a printing press, characterized in that the cutter lever is configured to rotate the cutter lever until the cutter lever rotates until the cutter lever rotates until the cutter lever rotates until the cutter lever rotates until the cutter lever rotates until the cutter lever rotates until the cutter lever rotates.