JPH06254795A - Cutter mechanism - Google Patents

Abstract

PURPOSE:To simplify assembly of a round blade unit by a method wherein, in an assembly process for a round blade unit comprising a round blade bearing, a round blade, and a rotating roller and round blade pressing cover, a machining work and a press-in and adhesion work by a machine are eliminated. CONSTITUTION:A cutter mechanism comprises a round blade 5; a round blade bearing 41 assembled to the round blade 5 through fit-in structure, and a rotating roller and round blade pressing cover 42 to additionally function as a cover to press the round blade 5 against the bearing 41. The round blade 5, the bearing 41, and the rotating roller and round blade pressing cover 42 are assembled together to form a unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter mechanism incorporated in an OA device such as a facsimile machine, a copying machine, a printer or the like, for cutting a rolled sheet (hereinafter referred to as roll paper) to a desired length. In particular, the present invention relates to a round blade mounting type cutter mechanism for moving a blade of a round blade while pressing it against a linear long fixed blade to cut roll paper placed between the fixed blade and the round blade.

[0002]

2. Description of the Related Art Conventionally, this type of cutter mechanism has been used in OA equipment for the purpose of cutting ejected roll paper page by page. Regarding this, the invention of Japanese Patent Application No. 4-186397 and Japanese Patent Application No. 4-30113
The first type of invention is listed.

FIG. 7 is a perspective view of a cutter mechanism described in Japanese Patent Application No. 4-186397. Pulleys 8 provided on the back and front sides of the cutter frame 1 in the longitudinal direction
The wire 10 is hooked on the hook portion 15 of the round blade base 26 via the. When the pulley 8 is rotated together with the gear 13 by the motor 9 having the pinion 12 on the rotation shaft (the pulley 8 and the gear 13 on the motor 9 side are integrally configured), the wire 10 moves in the rotation direction of the pulley 8 and the round blade base 26 is moved. It is pulled by the wire 10 and starts to move. The circular blade base 26 reciprocates from the back side to the front side in the longitudinal direction of the cutter frame 1 when the motor 10 rotates normally, and from the front side to the back side when the motor 10 rotates reversely. The tension coil spring 7 provided on the hook portion 15 of the round blade base 26 generates a driving force of the wire 10 on the pulley 8 by generating a tension on the wire 10. One end of the cutter frame 1 that is bent in an L shape is the running guide portion 4 of the round blade base 26. By making a part of the circular blade base 26 concave and fitting it into the traveling guide portion 4, the circular blade base 26 is moved to the traveling guide portion 4.
It reciprocates while sliding along. The fixed blade 2 is fixed to the cutter frame 1 by means such as welding or adhesion. When the roll paper placed between the fixed blade 2 and the round blade 5 is separated from the fixed blade 2, the front Russell part 33 guides the roll paper to the vicinity of the fixed blade 2.

FIG. 8 is a perspective view of the ZZ section of FIG. The round blade 5 and the rotation roller 16 are integrated with the support bearing 17 by means such as press fitting or adhesion (hereinafter referred to as a round blade unit). The round blade unit 18 and the round blade pressing spring 19 are inserted in the round blade rotating shaft 11 of the round blade base 26. At this time, the round blade pressing spring 19 presses the round blade 5 against the fixed blade 2. When the circular blade base 26 slides and reciprocates on the cutter frame 1, the rotating roller 16 in contact with the fixed blade 2 rotates at the same time as the frictional resistance force with the fixed blade 2 as a drive source, and is integrally formed. Round blade 5 rotates, fixed blade 2 and round blade 5
Cut the roll paper placed between.

FIG. 9 is a perspective view of a cutter mechanism described in Japanese Patent Application No. 4-301131, and FIG. 10 is a W of FIG.
It is a -W cross section perspective view. The rotating roller 16 is fixed to the fixed blade 2 by the pressing force of the spring (or the elastic force of the rotating roller 16 itself).
The circular blade 5 rotates more reliably by increasing the frictional resistance between the fixed blade 2 and the rotating roller 16 by pressing the blade against the rotating blade 16 and the pressing force of the spring (or the elastic force of the rotating roller 16) and its The reaction force causes the fixed blade 2 to rotate 16
By sandwiching between the movable table 6 and the movable table 6, defective cutting due to unstable running of the round blade 5 can be prevented.
The moving guide section 4 and the fixed blade 2 are sandwiched between the movable table 6 and the blade tip of the round blade 5 by the pressing force of the spring 19 and the reaction force for pressing the blade against the fixed blade 2. A cutting failure caused by peeling of the blade 5 is prevented. In addition, the round blade 5 from the back side in the longitudinal direction of the cutter to the front side,
The main configuration for reciprocating sliding movement from the front side to the back side and the means for cutting the roll paper are described in Japanese Patent Application No. 4-1 described above.
Since it is similar to the cutter mechanism described in No. 86397, the description thereof will be omitted.

[0006]

SUMMARY OF THE INVENTION In a round blade mounting type cutter mechanism, in order to realize a smooth cutting operation, the round blade must always rotate at a constant cycle. Therefore, the rotation roller and the round blade must always rotate integrally. Therefore, in these conventional cutter mechanisms, the round blade is fixed to the round blade support bearing by means such as press-fitting, and the rotation roller is further fixed to the round blade support bearing or the round blade by means such as adhesion to make the round blade support. With the support bearing and the rotation roller as a unit configuration, the rotation roller and the round blade always rotate together. However, with these conventional cutter mechanisms, machining and bonding work are required in the process of assembling this round blade unit, and since the round blade support bearing is extremely small, it is difficult to press fit the round blade and production efficiency is extremely low. It was causing a disadvantage.

In view of the above, the present invention improves the drawbacks of the conventional cutter mechanism described above, and eliminates the need for machining, press-fitting and bonding work by a machine in the assembly process of the round blade unit, so that the round blade unit can be assembled easily. And then
In addition, it is intended to avoid an increase in the size of the round blade unit.

[0008]

According to the present invention, there is provided a cutter frame, a linear long fixed blade fixed to the frame, a round blade type movable blade, and a bearing which rotates integrally with the round blade. A rotary blade that rotates integrally with the round blade and the bearing, and a lid for pressing the round blade, a round blade rotating shaft arranged so that the blade edge of the round blade slightly overlaps the blade edge of the fixed blade, and the round blade A pressing spring for pressing the blade edge of the fixed blade against the fixed blade, a moving path arranged in parallel to the fixed blade in the frame, and a moving table arranged to be movable in parallel to the fixed blade by the moving path, A round blade holding base for holding the round blade, a connecting arm for connecting and holding the round blade holding base across the blade tip of the fixed blade from the moving base, and the round blade arranged on the frame for fixing the round blade. Having a moving means for moving in parallel to the blade, The rotation roller / round blade pressing lid is arranged so as to come into contact with the fixed blade, and when the round blade is moved by the moving means, the friction resistance between the fixed blade and the rotation roller / round blade pressing lid is increased. In the cutter mechanism in which the rotating roller / round blade pressing lid rotates on the drive source and the circular blade rotates integrally with the rotating roller / round blade pressing lid, the circular blade and the circular blade assembled by the engaging structure are attached. It has a blade bearing and a rotating roller / round blade pressing lid that is assembled to the bearing by a mating structure and also serves as a lid for pressing the round blade against the bearing, and has the round blade, the bearing, and the rotating roller / round blade. When a cutter mechanism with a pressing lid as a unit is adopted as a means, and when the rotating roller is made into an elastic body, it has an elastic body rotating ring instead of the rotating roller and round blade pressing lid, And round blade, and the bearing, and the round blade pressing cap, with the elastic member rotating ring is employed as the means for the cutter mechanism is unit configuration, further the elastic rotation ring O-ring,
The problem is solved by adopting a cutter mechanism in which the round blade, the bearing, the round blade pressing lid, and the O-ring are unitarily configured.

[0009]

Embodiments of the cutter mechanism of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partial perspective view (A), an exploded perspective view (B) and a modified exploded perspective view (C) showing a first embodiment of a round blade unit of a cutter mechanism of the present invention. Round blade bearing 41
Insert the round blade 5 into the round blade bearing 41 so that the groove 47 (or the square hole etc.) of the round blade 5 fits the rib (or the bearing of the square outer circumference or the circular boss / D-cut type bearing not shown). Then, the rotation roller / round blade pressing cover 42 is fitted into the round blade bearing 41. At this time, a mating groove 49 (or a hole, a recess, or the like not shown) provided in a part of the round blade bearing 41, and a mating rib (a part of the rotation roller / round blade pressing cover 42) ( Alternatively, protrusions (not shown) are engaged with each other to prevent the rotation roller / round blade pressing cover 42 from falling off the supporting shaft bearing 41, and also have a role of positioning when fitted.

FIG. 2 is a partial sectional perspective view (A) and an exploded perspective view (B) showing a second embodiment of the round blade unit of the cutter mechanism of the present invention. The fitting portion 50 of the ring-shaped elastic body rotation roller 43 and the retaining flange 5 of the rotation roller 43.
The ring-shaped elastic body rotation roller 43 is fitted into the round-blade pressing lid 45 having 1 and then fitted into the round-blade bearing 41 into which the round blade 5 is inserted. At this time, the elastic body rotation ring 4
3 is sandwiched between the round blade 5 and the retaining portion 51 of the round blade pressing lid 45.

FIG. 3 is a partial sectional perspective view (A) and an exploded perspective view (B) showing a third embodiment of the round blade unit of the cutter mechanism of the present invention. O-ring 4 on the round blade pressing lid 45
After fitting 4 in, it is fitted in the round blade bearing 41 in which the round blade 5 is inserted.

2 and 3, the elastic body rotation ring 43, the O-ring 44 and the round blade pressing lid 45 are integrated with the round blade pressing lid 45 by the tension of the elastic body rotation ring 43 and the O-ring 44. ing.

FIG. 4 is a perspective view of an embodiment of a cutter mechanism using the round blade unit of the second embodiment of the present invention, and FIG. 5 is FIG.
6 is an exploded perspective view of an embodiment of the cutter mechanism of the present invention, FIG.
FIG. 6 is a perspective view of the cutter mechanism of the present invention in FIG. 4 taken along the line P-P. The cutting operation and the main configuration of the cutter mechanism shown in these drawings are completely the same as those of the conventional cutter mechanism described above, and thus the description thereof will be omitted.

[0015]

As described above, the cutter mechanism of the present invention has a round blade, a round blade bearing assembled to the round blade by a fitting structure, and a round blade bearing assembled to the bearing by a mating structure. Has a rotation roller and a round blade pressing lid that also functions as a lid for pressing the bearing to the bearing, and instead of the round blade, the bearing, the rotation roller and the round blade pressing lid, a fitting portion and a retaining portion of the elastic body rotation ring With a round blade pressing lid having, and an elastic body rotation ring, the round blade,
The bearing, the round blade pressing lid, and the elastic body rotation ring into a unit configuration, further using an O-ring for the elastic body rotation ring, the round blade, the bearing, the round blade pressing lid, the The unit construction of the O-ring eliminates the need for machining, press-fitting and bonding work by the machine in the assembly process of the round blade unit, and the round blade unit can be assembled by hand very easily and with appropriate accuracy.

When the rotation roller is made of an elastic body, the ring-shaped elastic body rotation roller is fitted into a round blade pressing lid having a flange, and the ring blade is fitted into a round blade bearing in which the round blade is inserted. Since the elastic body rotation roller is sandwiched by the flange of the lid for pressing the round blade and the round blade, the effect of preventing the elastic rotation roller from collapsing is exerted, and the enlargement of the round blade unit can be prevented.

Further, by using a ready-made O-ring for the ring-shaped elastic body rotating roller, the elastic body rotating roller can be easily attached and the cost can be reduced.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a round blade unit of a cutter mechanism of the present invention, (A) is a perspective view showing a part in section,
(B) is an exploded perspective view and (C) is a modified exploded perspective view.

FIG. 2 shows a second embodiment of the round blade unit of the cutter mechanism of the present invention, (A) is a perspective view showing a part in section,
(B) is an exploded perspective view.

FIG. 3 shows a third embodiment of the round blade unit of the cutter mechanism of the present invention, (A) is a perspective view showing a part in section,
(B) is an exploded perspective view.

FIG. 4 is a perspective view of an embodiment of a cutter mechanism using the round blade unit of the second embodiment of the present invention.

5 is a perspective view showing an exploded part of an embodiment of the cutter mechanism of the present invention in FIG.

6 is a P- of an embodiment of the cutter mechanism of the present invention of FIG.
It is a P cross-section perspective view.

FIG. 7 is a perspective view of a conventional cutter mechanism.

8 is a ZZ sectional perspective view of the conventional cutter mechanism of FIG. 7. FIG.

FIG. 9 is a perspective view of another conventional cutter mechanism.

FIG. 10 is a perspective view of another conventional cutter mechanism of FIG. 9 taken along the line WW.

[Explanation of symbols]

 1 Cutter Frame 2 Fixed Blade 3 Round Blade Support 4 Travel Guide 5 Round Blade 6 Moving Stand 7 Tension Coil Spring 8 Pulley 9 Motor 10 Wire 11 Round Blade Rotating Shaft 12 Pinion 13 Gear 15 Hook 16 Rotating Roller 17 Spindle Bearing 18 Round Blade unit 19 Round blade pressing spring 20 Coil spring 21 Support plate 26 Round blade stand 31 Connecting arm part 32 Sliding part 33 Front rassel part 41 Round blade bearing 42 Rotating roller and round blade pressing lid 43 Elastic body rotation ring 44 O-ring 45 Round Blade pressing cover 46 Rib 47 Groove 48 Mating rib 49 Mating groove 50 Fitting part 51 Locking part

Claims (3)

[Claims] 1. A cutter frame, a linear long fixed blade fixed to the frame, a circular blade type movable blade,
A bearing that rotates integrally with the round blade, a rotation roller and a round blade pressing lid that rotates integrally with the round blade and the bearing, and the blade edge of the circular blade is arranged so as to slightly overlap the blade edge of the fixed blade. Round blade rotating shaft, a pressing spring that presses the blade edge of the round blade against the fixed blade, a movement path arranged in the frame in parallel with the fixed blade, and the movement path allows movement in parallel with the fixed blade. A moving table arranged in
A round blade holding base for holding the round blade, a connecting arm for connecting and holding the round blade holding base across the blade tip of the fixed blade from the moving base, and the round blade arranged on the frame for fixing the round blade. Having a moving means for moving in parallel to the blade, the rotation roller and round blade pressing lid is arranged so as to contact the fixed blade, when the round blade is moved by the moving means,
A cutter mechanism in which the fixed blade and the rotation roller / round blade pressing lid are used as a driving source to rotate the rotation roller / round blade pressing lid and the round blade integrally rotates with the rotation roller / round blade pressing lid. In, a round blade, a round blade bearing assembled to the round blade by a mating structure, and a round blade bearing that is assembled to the bearing by a mating structure and that also functions as a lid that presses the round blade against the bearing A cutter mechanism having a lid, wherein the round blade, the bearing, the rotation roller and the round blade pressing lid are unitized. 2. The cutter mechanism according to claim 1,
Instead of the rotation roller and the round blade pressing lid, a round blade pressing lid having a fitting portion and a retaining portion of the elastic body rotating ring, and an elastic body rotating ring having the round blade, the bearing, and the round blade. A cutter mechanism comprising a pressing lid and the elastic body rotation ring as a unit. 3. The cutter mechanism according to claim 2,
A cutter mechanism, wherein the elastic body rotation ring is an O-ring, and the round blade, the bearing, the round-blade pressing lid, and the O-ring are unitized.