JP2008006545A - Cutter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter device, achieving smooth cutting over a long period of time by restraining generation of heat due to mutual contact in mounting parts of a pair of cutting blades to a driving device. <P>SOLUTION: In this cutter device 10, first and second cutting blades 15, 21 are mounted on a support part 12 of the driving device with fitting parts 16, 22 at one end in the longitudinal direction overlapping each other so that the blade parts 19, 26 are opposite to each other. Both cutting blades 15, 21 are intersected to thereby cut a band-like body to be cut. The back side of the fitting part 22 of the second cutting blade 21 is provided with a recessed part 23, which is substantially oblong, partially extended to the inside of the body part, and a little recessed from the back. The back of the fitting part 22 of the second cutting blade 21 is superposed on a flat surface side of the fitting part 16 of the first cutting blade 15, whereby the contact area between the fitting parts 16, 22 can be remarkably reduced by the recessed part 23 provided on the fitting part 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a long and thin plate-like package in which a pair of cutting blades having a blade portion formed on one side edge in the width direction are wrapped in a band shape by wrapping a drug, candy, etc., which is a band-shaped object to be cut. The present invention relates to a cutter device for cutting paper or the like.

Conventionally, as this type of cutter device, for example, as shown in Patent Document 1, a pair of holders that repeatedly rotate at a required rotation angle in opposite directions with a common support shaft as a fulcrum, and a blade portion that faces these holders There is known one provided with a pair of cutting blades mounted in this manner and a driving means for rotating the holder. In this cutter apparatus, the tip of an arm formed integrally with a holder is synchronously driven by a cam that is rotationally driven by a motor of a driving means, and is repeatedly driven at a required rotational angle, and intermittently supplied continuously by both cutting blades. The package is cut.
JP 2005-349511

  By the way, the conventional cutter device described above is always in contact with the mounting portion attached to the support shaft of the holder integrated with the pair of cutting blades, and rotates at a predetermined angle with each other at a high speed. An exotherm occurs. Due to this heat generation, the cutting blade also becomes hot, so that there are problems such as deterioration of the package, easy attachment of the package to the cutting blade, and loss of durability of the cutting blade. Further, as a cutter device different from the above cutter device, a pair of cutting blades are attached to the support portion of the drive device with the attachment portions on one end side in the longitudinal direction being overlapped with each other, and one or both of the cutting blades can be moved at high speed. There is something that cuts the band-shaped workpiece by rotating and crossing a pair of blade parts, but in this type of cutter device, the heat generated by contact of each mounting part is further increased by the high-speed rotation of the cutting blade, The problem due to heat generation is more remarkable.

  The present invention is intended to solve the above-described problem, and provides a cutter device that enables smooth cutting over a long period of time by suppressing heat generation due to mutual contact at a mounting portion of a pair of cutting blades to a drive device. With the goal.

  In order to achieve the above object, a structural feature of the present invention is that a pair of cutting blades having a long thin plate shape and having a blade portion formed on one side edge in the width direction face each other. In the cutter device for cutting the strip-shaped object by crossing the blade portions of the pair of cutting blades, the attachment portions on one end side in the longitudinal direction are overlapped with each other and attached to the support portion of the drive device, A recess is provided on at least one contact surface of both contact surfaces with which the attachment portion contacts.

  By configuring the present invention as described above, the band-shaped object to be cut is cut when the blade portions of the pair of cutting blades attached to the support portion of the drive device intersect at high speed. The cutting blade mounting portions also come into contact with each other at high speed, and heat is generated accordingly. However, since the concave portion is provided on at least one of the contact surfaces that contact the attachment portions of the pair of cutting blades, the contact area of both attachment portions is reduced by the amount of the provision of the concave portions. Therefore, the heat generated by the contact between the two attachment portions can be greatly reduced, and the temperature rise of the cutting blade can be suppressed accordingly.

  Moreover, in this invention, a recessed part can be arrange | positioned surrounding the rotation center in an attaching part, and, thereby, a recessed part can be efficiently arrange | positioned in the wide range of an attaching part. In this case, it is preferable that the planar shape of the recess is non-circular. Thereby, since the shape of the non-contact part by the recessed part in both attachment parts always changes with the fluctuation | variation of the contact position of a pair of attachment part, the effect which suppresses the heat_generation | fever by a recessed part is acquired more efficiently.

  Moreover, in this invention, the small hole which penetrates an attachment part and is connected to a recessed part can be provided in at least one of the attachment part of a pair of cutting blade. As a result, the heat generated by the contact between the pair of attachment portions and stored in the recesses is efficiently released to the outside through the small holes, so that the heat generated by the contact of the attachment portions can be more effectively suppressed.

  In the present invention, by providing a recess in at least one contact surface of both contact surfaces with which the attachment portions of the pair of cutting blades come into contact, heat generated by the contact between both attachment portions can be greatly reduced. Since the temperature rise of the cutting blade associated therewith is suppressed, it is possible to prevent inconvenience that the strip-shaped workpiece is altered or the strip-shaped workpiece tends to adhere to the cutting blade, and the durability of the cutting blade can be improved. . Further, in the present invention, a concave portion is disposed so as to surround the rotation center of the mounting portion, and the planar shape of the concave portion is made non-circular, or at least one of the mounting portions of the pair of cutting blades penetrates the mounting portion to form the concave portion. By providing a small hole communicating with the heat generation, heat generation at the mounting portion can be more effectively suppressed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 are front views showing a state before and after the cutting operation, and a state after the cutting operation, with respect to an attachment portion of a pair of cutting blades, which is a main part of the cutter device according to the embodiment. The first cutting blade on the receiving side is shown by a front view, and FIGS. 5 and 6 show the second cutting blade on the cutting side by a front view and a sectional view. The cutter device 10 is provided with a cylindrical support portion 12 that protrudes coaxially with respect to the rotation shaft of the drive motor (not shown) from the front plate portion 11 of the housing constituting the drive device including the drive motor. 12, a receiving-side first cutting blade 15 that is one cutting blade and a cutting-side second cutting blade 21 that is the other cutting blade are attached.

  As shown in FIG. 4, the first cutting blade 15 is a long thin plate, and extends on the same plane from the rectangular attachment portion 16 and one short side (right side in FIG. 4) of the attachment portion 16. And an arcuate plate-shaped main body 18. A circular large-diameter insertion hole 17a is provided in the center of the mounting portion 16 so as to penetrate the mounting portion 16, and a pair of circular small holes spaced apart from the insertion hole 17a on both outer sides in the longitudinal direction. A mounting hole 17b is provided through the mounting portion 16. The main body 18 extends from the one end in the width direction of the mounting portion 16 (the lower end in FIG. 4) in the range of about ½ of the length in the width direction, and as a whole in the width direction with respect to the longitudinal direction of the mounting portion 16. It has a shape curved in an arc shape toward the other end (upper end in FIG. 4). The main body 18 has a substantially flat surface side (front side in FIG. 4), and the width continuously decreases gradually from the base side toward the tip side. A blade portion 19 is provided between the vicinity of the base (upper side in FIG. 4) and the tip.

  The blade portion 19 is inclined at a small inclination angle from the middle in the width direction toward the side edge on the center side on the back surface side (back surface side in FIG. 4) of the main body portion 18, and the thickness gradually decreases. The vicinity 19a is formed so as to have a sharp shape inclined at a large inclination angle. Furthermore, the concave side edge provided with the blade portion 19 of the first cutting blade 15 has an inclination angle with respect to the longitudinal direction around the insertion hole 17a is substantially 0 ° (near ± 5 °) on the root side. It is formed so as to gradually increase toward the tip side.

  As shown in FIG. 5, the second cutting blade 21 is a long thin plate, and is on the same surface from the rectangular attachment portion 22 and the entire one short side (right side in FIG. 5) of the attachment portion 22. As a whole, it has a main body 25 that is curved in an arc shape as a whole. Specifically, the main body portion 25 is slightly curved in an arc shape toward one end in the width direction (the lower end in FIG. 5) with respect to the longitudinal direction from the root portion to the substantially middle portion in the longitudinal direction, and further substantially in the longitudinal direction. From the intermediate portion to the tip, the shape is slightly curved in an arc shape toward the other end in the width direction (upper end in FIG. 5) with respect to the longitudinal direction. Further, the main body 25 is substantially flat on the back surface side (the back surface side in FIG. 5), and the width continuously decreases from the substantially middle portion in the longitudinal direction toward the tip side. A blade portion 26 is provided between the vicinity of the base on the side edge side (lower side in FIG. 5) and the tip. The blade portion 26 is inclined at a small inclination angle from the middle in the width direction to the one end side edge on the surface side of the main body portion 25 (front side in FIG. 5), and the thickness gradually decreases from the side edge vicinity 26a. It is formed so as to have a sharp shape inclined at a large inclination angle.

  An odd-shaped insertion hole 23 a is provided through the center of the attachment portion 22. The insertion hole 23a is formed by integrating a circular hole portion having a radius that is substantially half the width of the mounting portion 22 and a pair of horizontal hole portions that extend slightly linearly from both sides in the longitudinal direction of the mounting portion 22 in the circular hole portion. Have. On the back side of the mounting portion 22 (the back side in FIG. 5), as shown in FIG. 6, there is provided a recess 23 that is substantially rectangular and partially recessed from the back surface that partially extends into the main body 25. The concave portion 23 has the same width as the diameter of the circular hole portion of the insertion hole 23a, extends parallel to the longitudinal direction in contact with the circular hole portion, and is disposed so as to surround the insertion hole 23a that is the rotation center. . The edge of the recess 23 on the side extending into the main body 25 is slightly inclined toward the blade 26. In the recess 23, a pair of small holes 24 are provided in the vicinity of both ends in the longitudinal direction.

  A support portion 12 of the cutter device 10 is fixed to a rotating shaft (not shown) of a drive motor at the center of the fixed shaft portion 13 and a cylindrical fixed shaft portion 13 fixed to the front plate portion 11 of the housing. And a columnar rotating shaft portion 14 which is rotatable integrally with the shaft. The distal end of the fixed shaft portion 13 is a circular protrusion into which the insertion hole 17a is inserted, and the distal end of the rotary shaft portion 14 protrudes beyond the fixed shaft portion 13 so that the insertion hole 23a is tightly inserted. This is a deformed protrusion. And the center of the front-end | tip of the rotating shaft part 14 protrudes further, and the reverse thread external thread (not shown) is formed. As shown in FIG. 1, the first cutting blade 15 is fitted into the projection of the fixed shaft portion 13 through the insertion hole 17a with the blade portion 19 facing upward, and is fixed by a fixing tool such as a bolt through the mounting hole 17b. It is fixed to the fixed shaft part 13. As shown in FIG. 1, the second cutting blade 21 is fitted with a protrusion of the rotary shaft portion 14 through the insertion hole 23a with the blade portion 26 facing downward, and is a nut (illustrated) that is screwed into the reverse thread male screw. And is fixed to the rotary shaft portion 14 in a state of being overlapped with the first cutting blade 15 and rotated integrally with the rotary shaft portion 14 in the clockwise direction (arrow R direction in the drawing). Thus, with the flat surface side of the mounting portion 16 of the first cutting blade 15 and the flat back surface of the mounting portion 22 of the second cutting blade 21 overlaid, by the recess 23 provided in the mounting portion 22, The contact area between the mounting portions 16 and 22 is greatly reduced.

  In the embodiment of the above configuration, as shown in FIGS. 1 to 3, on the base side of the main body portion 18 of the first cutting blade 15 fixed to the fixed shaft portion 13 and arranged with the blade portion 19 facing upward. The to-be-cut body C that is continuous in a band shape that wraps candy and the like is continuously supplied onto the blade portion 19 at a constant pitch. At the same time, the second cutting blade 21 fixed to the rotary shaft portion 14 rotates in the direction of arrow R in accordance with the electric motor having a rotation cycle that matches the feed pitch of the band-shaped workpiece C, whereby the band-shaped workpiece C Can be cut between the first cutting blade 15 and separated into a single package. More specifically, since the side edge side of the blade portion 19 of the first cutting blade 15 and the side edge side of the blade portion 26 of the second cutting blade 21 are in contact with each other to cut the workpiece C, the first cutting blade The flat front surface side (front side in FIG. 4) of the main body portion 15 of FIG. 15 and the flat rear surface side (rear surface side in FIG. 5) of the main body portion 25 of the second cutting blade 21 are the side edge side of the blade portion 19 and the blade portion. The flat surfaces of each other are slightly inclined so that the side edges of 26 are in contact with each other and the other portions are separated from each other. Thereby, the strip-shaped workpiece C can be shear-cut with the first cutting blade 15 and the second cutting blade 21 and separated into a single package.

  Further, when the strip-shaped workpiece C is cut at the base side of the first and second cutting blades 15, 21, a force directed radially outwardly acts on the workpiece C by the two cutting blades 15, 21. In addition, since the escape to the outside of the workpiece C is suppressed by the blade portion 19 having a concave side edge, the cutting of the cutting blades 15 and 21 at the base side is stably performed, and the reaction force is relatively Therefore, a smooth cutting is performed and heat generation due to the cutting is suppressed. As a result, in the present embodiment, long-term durability of the first and second cutting blades 15 and 21 is ensured, and the cost required for the cutting blades is relatively reduced. Further, in the present embodiment, the concave side edge provided with the blade portion 19 of the first cutting blade 15 has a small inclination angle with respect to the radial direction around the insertion hole 17a as almost 0 ° on the root side, and the tip side By being formed so as to gradually increase toward the surface, the effect that the cutting to the outside of the object to be cut C is effectively suppressed particularly by the blade portion 19 and the cutting is performed stably is further ensured. Is obtained.

  And in the said Example, when cutting the strip | belt-shaped to-be-cut | disconnected body C by the blade parts 19 and 26 of the said 1st and 2nd cutting blades 15 and 21 crossing at high speed, attachment of both the cutting blades 15 and 21 is carried out. The parts 16 and 22 also come into contact with each other at high speed, and heat is generated accordingly. However, since the concave portion 23 is provided on the contact surface of the second cutting blade 21 with the mounting portion 16 of the mounting portion 22, the contact area of both the mounting portions 16 and 22 is reduced by the amount of the concave portion 23. The heat generated by the contact between the mounting portions 16 and 22 can be greatly reduced. Furthermore, the concave portion 23 is efficiently disposed in a wide range of the mounting portion 22 by being disposed so as to surround the insertion hole 23 a that is the rotation center of the mounting portion 22. In addition, since the planar shape of the concave portion 23 is a substantially rectangular shape that is not circular, the contact positions of the pair of mounting portions 16 and 22 accompanying the rotation of the second cutting blade 21 cause a change in both the mounting portions 16 and 22. Since the shape of the non-contact portion is always different depending on the recess 23, the effect of suppressing the heat generation by the recess 23 is more effectively exhibited.

  Further, the second cutting blade 21 is provided with a pair of small holes 24 that pass through the attachment portion 22 and communicate with the recess 23, so that the second cutting blade 21 is generated by the contact of the pair of attachment portions 16, 22 and enters the recess 23. Since the accumulated heat is efficiently released to the outside through the small holes 24, the heat generated by the contact of the attachment portions 16 and 22 can be more effectively suppressed. As a result, in the present embodiment, the heat generated by the contact between both mounting portions 16 and 22 can be greatly reduced, so that the temperature rise of the first and second cutting blades 15 and 21 can be suppressed, and the cutting can be performed. At this time, it is possible to prevent the band-shaped workpiece C from being altered or the band-shaped workpiece C from being easily attached to the cutting blades 15, 21, and the durability of the cutting blades 15, 21 can be improved.

  In the above embodiment, the shape of the recess 23 is substantially rectangular. However, the shape is not limited to this, and can be any shape. The effect of suppressing heat generation is slightly inferior, but may be circular. Moreover, although the recessed part 23 is provided surrounding the insertion hole 23a which is a rotation center, it is not restricted to this but can also be provided in the arbitrary positions of the attachment part 22. FIG. Moreover, in the said Example, although the recessed part was provided only in the attachment part 22 of the 2nd cutting blade 21, it can also be provided only in the attachment part 16 of the 1st cutting blade 15, and also both attachment parts 16 and 22 are provided. It is also possible to provide a recess on the surface. Further, in the above embodiment, the small hole 24 is provided in the concave portion 23, but a small hole may be provided in the attachment portion 16 of the first cutting blade 15, and both the attachment portions 16 and 22 are provided in the concave portion 23. It is also possible to provide small holes that communicate with each other.

  In the above embodiment, the first cutting blade 15 is fixed to the fixed shaft portion 13 and the second cutting blade is fixed to the rotating shaft portion 14 directly connected to the rotating shaft of the electric motor so as to rotate. However, conversely, the first cutting blade can be rotated to fix the second cutting blade, and both cutting blades can be further rotated. Further, as shown in Patent Document 1, the first and second cutting blades are configured so that the blade portions face a pair of holders that repeatedly rotate at a required rotation angle in opposite directions with a common support shaft as a fulcrum. The holder may be repeatedly driven at a required rotation angle by a driving means, and the package continuously supplied by both cutting blades may be cut intermittently. Further, the first and second cutting blades do not need to be entirely curved in an arc shape, and only the side edge side where the blade portion is provided can be formed into a concave or convex curved shape. As shown in the conventional example, the first and second cutting blades may be straight. In addition, in the cutter apparatus shown in the above embodiment, the structures of the first and second cutting blades are examples, and various modifications can be made without departing from the gist of the present invention.

  In the present invention, by providing a recess in at least one contact surface of both contact surfaces with which the attachment portions of the pair of cutting blades come into contact, heat generated by contact between both attachment portions can be greatly reduced. Since the temperature rise of the cutting blade is suppressed, it is possible to prevent the strip-shaped workpiece from being altered or to easily adhere to the cutting blade, and to improve the durability of the cutting blade. It is.

It is a front view which shows the attachment part of the 1st and 2nd cutting blade which is the principal part of the cutter apparatus which concerns on one Example of this invention. It is a front view which shows the middle of the cutting | disconnection operation | movement by the said 1st and 2nd cutting blade. It is a front view which shows the cutting operation completion state by the said 1st and 2nd cutting blade. It is a front view which shows a 1st cutting blade. It is a front view which shows a 2nd cutting blade. It is sectional drawing of the VI-VI line direction of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Cutter apparatus, 12 ... Support part, 15 ... 1st cutting blade, 16 ... Mounting part, 18 ... Main-body part, 19 ... Blade part, 21 ... 2nd cutting blade, 22 ... Mounting part, 23 ... Recessed part, 24 ... Small hole, 25 ... body part, 26 ... blade part.

Claims (4)

A pair of cutting blades with a long thin plate shape and a blade portion formed on one side edge in the width direction are driven with the attachment portions on one end in the longitudinal direction being overlapped with each other so that the blade portions face each other In the cutter device that is attached to the support portion of the apparatus and cuts the strip-shaped object by crossing the blade portions of the pair of cutting blades, at least one of both contact surfaces with which the attachment portions of the pair of cutting blades contact A cutter device characterized in that a concave portion is provided on the contact surface. The cutter device according to claim 1, wherein the concave portion is disposed so as to surround a rotation center of the attachment portion. The cutter device according to claim 2, wherein a planar shape of the concave portion is a non-circular shape. The cutter device according to any one of claims 1 to 3, wherein a small hole that penetrates the attachment portion and communicates with the recess is provided in at least one of the attachment portions of the pair of cutting blades. .

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