JPH04365593A - Cutter device - Google Patents

Abstract

PURPOSE:To selectively perform full cut and stub cut of a paper sheet while reducing size and weight. CONSTITUTION:A cutter cam 11 is provided and a cutter lever is located reciprocatively rotatably around a fulcrum 33, and an engaging hole 32 engaged with an eccentric shaft 12 of the cutter cam 11 with a gap therebetween is formed in the one end of the cutter lever. A cutter lever 31 having the other end to which a cutter 51 is coupled, a switching member 41 having an engaging part 42 insertably and retractably located between a side wall part 32a in a rotation direction of the engaging hole 32 of the cutter lever 31 and the eccentric shaft 12, and a drive means 45 for switching to drive and move the engaging part 42 of the switching member 41 in the directions of arrow marks C and D being an insertable and a retractable direction are provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter device.

0002

2. Description of the Related Art A conventional cutter device includes a drive mechanism 1, cutter cam 11A, crank 15, slider 21, cutter arm 25, cutter lever 3, as shown in FIG.
1A, a stub lever 35, and a cutter 51.

[0003] Here, the drive mechanism 1 includes a cutter cam 11.
It is a means for rotationally driving A, and is composed of a gear train 3 consisting of a large number of gears, a clutch mechanism 5 (a cutter magnet 6, a spring clutch lever 7, a spring clutch 8), and the like.

The cutter cam 11A is a member that converts rotational motion into linear motion, and has an eccentric shaft 12A. This cutter cam 11A has a crank 15 with an eccentric shaft 12A.
connected via. The crank 15 is moved forward and backward in the directions of arrows A and B as the cutter cam 11A rotates. An L-shaped switching hole 16 is formed at the tip of the crank 15.

Further, the slider 21 is provided so as to be able to freely move forward and backward in the directions of arrows A and B. This slider 2
An engagement shaft 22 is provided in the center of the crank 15, and the engagement shaft 22 is movably inserted into the switching hole 16 of the crank 15.

Further, the cutter arm 25 is rotatably supported via a support shaft 26. One end of the cutter arm 25 is rotatably connected to the slider 21, and an elongated hole 27 is formed in the other end.

Furthermore, the cutter lever 31A is connected to the support shaft 3.
It is rotatably provided around 3A. One end of the cutter lever 31A is connected to the elongated hole 2 of the cutter arm 25.
7, and a cutter 5 is fitted on the other end.
1 are connected.

Furthermore, the stub arm 35 is a member for selectively switching between a full cut (complete cutting) and a stub cut (perforation cutting) by changing the movement stroke of the cutter 51.

Specifically, the stub arm 35 is attached to the support shaft 3.
It is rotatably provided via 6. A stub magnet 38 is connected to one end of the stub arm 35, and an engaging portion 37 is formed at the other end. Thus, the stub magnet 38 is driven and the stub arm 3
When the engaging portion 37 of 5 is moved upward in FIG.
5 and pushes up the tip. As a result, the switching hole 16 of the crank 15 is moved upward with respect to the engagement shaft 22 of the slider 21. As a result, the engagement shaft 22 is relatively displaced from the position shown by the solid line in the figure (full cut position) to the position shown by the two-dot chain line (stub cut position).

In order to fully cut the paper P using the cutter device described above, the drive mechanism 1 is used to rotate the cutter cam 11A and the crank 15 is moved in the direction of arrows A and B.
move in the direction. Then, the slider 21 is synchronously moved in the same direction by the engagement shaft 22 positioned at the full cut position of the switching hole 16 of the crank 15. As a result, the cutter 51 is moved up and down via the cutter arm 25 and cutter lever 31A to fully cut the paper P.

[0011] Furthermore, in order to stub cut the paper P, it is necessary to reduce the movement stroke of the cutter 51 compared to a full cut. To do this, the stub magnet 38 is driven to push up the tip of the crank 15 by the engagement part 37 of the stub lever 35, and the engagement shaft 2 of the slider 21 is pushed up.
2 is relatively displaced to the stub cut position shown by the two-dot chain line in FIG.

In this state, by driving the drive mechanism 1 to move the crank 15 in the directions of arrows A and B, the cutter 51 is moved up and down via the slider 21, cutter arm 25, cutter lever 31, etc. At this time, the slider 21 is moved before its engagement shaft 22 comes into contact with the end of the switching hole 16 of the crank 15 that is moved in the direction of arrow A, and that the end of the switching hole 16 that is moved in the direction of arrow B is After it leaves, no power is transmitted and it stops, so the movement stroke becomes shorter. As a result, the movement stroke of the cutter 51 relative to the paper P is also reduced, and the paper P is stub cut.

[0013]

By the way, in the cutter device described above, there are a number of power transmission members (cutter cam 11A, crank 15, slider 21, cutter arm 25, cutter lever) between the drive mechanism 1 and the cutter 51. 31A, stub lever 35, etc.), the number of parts increases and a large installation space is required.
It has the disadvantage that it is difficult to meet demands for cost reduction.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a cutter device capable of selectively full-cutting and stub-cutting paper while achieving downsizing and cost reduction.

[0015]

[Means for Solving the Problems] The present invention provides a cutter device that performs full cuts and stub cuts by changing the movement stroke of the cutter relative to paper.
A cutter cam having an eccentric shaft and rotationally driven by a drive mechanism, and an engagement hole provided at one end so as to be rotatable back and forth about a fulcrum, into which the eccentric shaft of the cutter cam is fitted with a gap, and the other. a cutter lever having a cutter connected to an end thereof; a switching member having an engagement portion that is removably provided between a rotational direction side wall surface of an engagement hole of the cutter lever and the eccentric shaft; The present invention is characterized by comprising a switching drive means for moving and driving the engaging portion of the switching member in the insertion/extraction direction.

[0016]

[Operation] In the present invention, in order to fully cut the paper, first, the switching drive means is used to move the engagement portion of the switching member between the rotational side wall surface of the engagement hole of the cutter lever and the eccentric shaft of the cutter cam. Insert it in between.

Next, in this state, the cutter cam is rotated by the drive mechanism to cause the eccentric shaft to move eccentrically. Then,
The cutter lever reciprocates within a predetermined angular range about the fulcrum in synchronization with the rotation of the cutter cam in cooperation with the engagement hole, the eccentric shaft, and the engagement portion of the switching member. As a result, the cutter is moved up and down by a predetermined stroke, and the paper is completely cut by the cutter.

On the other hand, in order to reduce the movement stroke of the cutter and stub cut the paper, the switching drive means is used to pull out the engagement portion of the switching member from the engagement hole of the cutter lever.

Next, in this state, the cutter cam is rotated to eccentrically move the eccentric shaft. Then, the cutter lever reciprocates about the fulcrum by the cooperation of the engagement hole and the eccentric shaft.

At this time, by the time the eccentric shaft of the cutter cam comes into sliding contact with the side wall surface in the rotating direction of the engagement hole of the cutter lever and transmits power, the engagement portion of the switching member has been removed from the eccentric shaft. The cutter lever must pass through the empty part of the engagement hole, and the rotation range of the cutter lever becomes narrower by the length of the empty part (that is, the thickness of the engaging part) than when making a full cut. As a result, the movement stroke of the cutter relative to the paper also changes.
The rotation range of the cutter lever is reduced by the narrowed range, and the paper is stub cut.

[0021] In this way, by simply interposing the cutter cam, cutter lever, and stub arm as power transmission members between the drive mechanism and the cutter, it is possible to perform full cut and stub cut of paper, which is much more efficient than before. The number of power transmission members can be reduced.

[0022] Therefore, it is possible to selectively perform full cut and stub cut on paper while achieving miniaturization and cost reduction.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained based on the drawings.

As shown in FIGS. 1 to 4, the cutter device according to this embodiment includes a cutter base 10, a drive mechanism 1, a gear train 3, a cutter cam 11, a cutter lever 31, a switching member (41), and a cutter 51. Contains:

Components that are the same as those shown in FIGS. 5 and 6 are designated by the same reference numerals, and their explanations will be omitted or simplified.

Here, the cutter base 10 is a means for integrally mounting the drive mechanism 1, the cutter 51, etc. at high density in order to achieve miniaturization.

Further, the drive mechanism 1 is composed of a drive motor 2, a gear train 3, and the like.

The cutter cam 11 has an eccentric shaft 12 and is rotationally driven by the drive mechanism 1.

Furthermore, the cutter lever 31 has a fulcrum 33.
It is provided so that it can rotate back and forth around the center. An engagement hole 32 is formed in the center of the cutter lever 31, into which the eccentric shaft 12 of the cutter cam 11 is fitted with a gap. Further, a cutter 51 is connected to the tip of the cutter lever 31.

Furthermore, the switching member is a member for selectively switching between a full cut (complete cutting) and a stub cut (perforation cutting) by changing the movement stroke of the cutter 51. Specifically, the switching member has a structure in which the switching member has an engaging part provided between the rotation direction side wall surface part 32a of the engaging hole 32 of the cutter lever 31 and the eccentric shaft 12 of the cutter cam 11 so as to be freely inserted and removed. has been done. In this embodiment, the stub arm 41 is selected as the switching member.

[0031] The stub arm 41 is connected to the cutter lever 31.
via a connecting shaft 43, so that they can be freely approached and separated from each other. The stub arm 41 is provided with an engaging portion 42 that can be freely inserted into and removed from the eccentric shaft 12 and the rotational direction side wall surface 32a of the engagement hole 32 of the cutter lever 31. In FIG. 1, reference numeral 44 denotes a stag spring that urges the stub arm 41 (therefore, the engaging member 42) toward the cutter lever 31 and toward the lower side in FIG.

Furthermore, the switching drive means 45 is means for moving and driving the engaging portion (42) of the switching member (41). In this embodiment, the switching drive means 45 moves the stub arm 41 in the insertion/extraction direction (arrow C,
It is formed from a stub magnet 46 that is movable in the D direction). In addition, in FIG. 4, 19 is a paper insertion slot.

Next, the operation will be explained.

To fully cut the paper P inserted from the paper insertion slot 19, first move the engagement portion 42 of the stub arm 41 in the direction of arrow D using the switching drive means 45 to engage the cutter lever 31. Rotation direction side wall surface portion 3 of matching hole 32
2a and the eccentric shaft 12 of the cutter cam 11.

Next, in this state, the drive mechanism 1 rotates the cutter cam 11 to cause the eccentric shaft 12 to move eccentrically. Then, the cutter lever 31 reciprocates within a predetermined angular range around the fulcrum 33 in synchronization with the rotation of the cutter cam 11 in cooperation with the engagement hole 32, the eccentric shaft 12, and the engagement portion 42 of the stub arm 41. move. As a result, the cutter 51 is moved up and down by a predetermined stroke, and the paper P is completely cut by the cutter 51.

On the other hand, in order to reduce the moving stroke of the cutter 51 and stub cut the paper P, the switching drive means 45 is used to pull out the engaging portion 42 of the stub arm 41 from the engaging hole 32 of the cutter lever 31. .

Next, in this state, the cutter cam 11 is rotated to cause the eccentric shaft 12 to perform an eccentric movement. Then, the cutter lever 31 reciprocates about the fulcrum 33 due to the cooperation of the engagement hole 32 and the eccentric shaft 12.

At this time, by the time the eccentric shaft 12 of the cutter cam 11 comes into sliding contact with the side wall surface 32a in the rotation direction of the engagement hole 32 of the cutter lever 31 and transmits power, the eccentric shaft 12 has moved to the stub arm 41. The cutter lever 31 must pass through the empty part of the engagement hole 42 formed when the engaging part 42 of The rotation range will be narrower than during full cut. As a result, the paper P of the cutter 51
The movement stroke for the cutter lever 31 is also reduced by the narrower rotation range of the cutter lever 31, and the paper P is stub cut.

In this way, the paper P can be fully cut and stub cut simply by interposing the cutter cam 11, cutter lever 31, and stub arm 41 as power transmission members between the drive mechanism 1 and the cutter 51. , the number of power transmission members can be significantly reduced compared to the conventional method.

According to this embodiment, the cutter cam 11 and the engagement hole 32, which is provided so as to be rotatable back and forth about the fulcrum 33, and into which the eccentric shaft 12 of the cutter cam 11 is fitted with a gap at one end, are provided. A cutter lever 31 is formed with a cutter 51 connected to the other end thereof, and an engagement member is provided between the rotational direction side wall surface 32a of the engagement hole 32 of the cutter lever 31 and the eccentric shaft 12 so as to be freely inserted and removed. A switching member (stub arm 41) having a mating portion (42), a switching drive means 45 that drives the engaging portion (42) of the switching member (41) to move in the insertion/extraction direction (direction of arrows C and D). With this configuration, it is possible to selectively perform full cut and stub cut on the paper P while achieving miniaturization and cost reduction.

[0041]

According to the present invention, a cutter cam and an engagement hole are formed at one end of the cutter cam so as to be rotatable back and forth about a fulcrum, into which the eccentric shaft of the cutter cam is fitted with a gap, and the other end of the cutter cam is rotatable in a reciprocating manner about a fulcrum. a cutter lever with a cutter connected to the
A switching member having an engaging part that can be freely inserted and removed between the rotational direction side wall surface of the engagement hole of the cutter lever and the eccentric shaft, and the engaging part of this switching member is driven to move in the insertion and removal direction. Since the configuration includes the switching drive means, it is possible to selectively perform full cut and stub cut on paper while achieving miniaturization and cost reduction.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing essential parts of an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a stub arm is inserted between a rotational direction side wall surface of a cutter lever and an eccentric shaft of a cutter cam in one embodiment.

FIG. 3 is a front view showing the overall configuration of one embodiment.

FIG. 4 is a plan view showing the overall configuration of one embodiment.

FIG. 5 is a perspective view showing a schematic configuration of a conventional cutter device.

FIG. 6 is a diagram for explaining a stub cut switching operation of a conventional cutter device.

[Explanation of symbols]

1 Drive mechanism 11 Cutter cam 12 Eccentric shaft 31 Cutter lever 32 Engagement hole 41 Stub arm (switching member) 45　Switching drive means 51 Cutter

Claims (1)

[Claims] Claim 1. A cutter device that performs full cutting and stub cutting by changing the movement stroke of the cutter relative to paper, which includes a cutter cam that has an eccentric shaft and is rotationally driven by a drive mechanism, and a cutter cam that rotates back and forth around a fulcrum. A cutter lever that is movably provided and has an engagement hole formed at one end thereof into which the eccentric shaft of the cutter cam is fitted with a gap, and a cutter connected to the other end; and rotation of the engagement hole of the cutter lever. A switching member having an engaging portion provided between the direction side wall surface portion and the eccentric shaft so as to be freely inserted and removed, and a switching drive means for driving the engaging portion of the switching member to move in the insertion and removal direction. A cutter device characterized by: