JP5365565B2 - Cutting tool - Google Patents

Description

  The present invention relates to a cutting tool suitable for cutting an animal's ingrown nail, and in particular, there is no risk of pinching a user's finger during use, and the nail while preventing other than the animal's nail from being pinched In addition, the degree of adhesion of the movable blade to the fixed blade can be adjusted, the movable blade can be moved stably without shaking, and the movable blade and the fixed blade can be easily replaced. The present invention relates to a cutting tool that is capable of operating.

  Conventionally, as an nail clipper for animals, for example, the present inventor has devised a nail clipper (hereinafter referred to as a straight blade type) disclosed in Patent Document 1 below. In addition to the straight blade type disclosed in Patent Document 1, for example, a nail clipper (hereinafter referred to as a skew blade type) shown in Patent Document 2 is known.

  Registered Utility Model No. 3096809   Japanese Utility Model Publication No. 4-68662

  A nail clipper 60 shown in Patent Document 1 shown in FIG. 6 has an insertion hole 65a into which a lower blade 63 engaged at the tip of an operating piece 62 that operates together with the operation of the operating rod 61 is inserted, and a main body 64. The upper blade 65 fixedly provided on the main body 64 is slid linearly back and forth from the holding hole 64A of the main body 64.

  The straight blade type nail clipper 60 as in Patent Document 1 has a nail positioned in the insertion hole 65a of the upper blade 65, and the most distal portion (this is substantially a blade in the inner periphery of the insertion hole 65a). ) And the lower blade 63 that travels straight, the claw is cut.

  The nail clipper 70 shown in Patent Document 2 shown in FIG. 7 supports the collar pieces 71 and 72 provided at one end portion so as to be openable and closable around the support shaft 73 and in an intersecting manner. Concave blades 71a and 72a are provided at opposing positions, and operation pieces 74 and 75 for opening and closing the flange pieces 71 and 72 are formed at the other end.

  A slanting blade type nail clipper 70 as in Patent Document 2 is formed in a crossing manner around a support shaft 73 by positioning a nail between collar pieces 71 and 72 and operating the operation pieces 74 and 75 close to each other. The nail | claw is cut | disconnected by making this provided scissors 71 and 72 (blade part 71a, 72a) approach diagonally.

  However, these Patent Documents 1 and 2 have a problem that a so-called wound nail that the nail tip is wound and bites into meat cannot be cut. By the way, the positional relationship between nail clippers and nails is the same for human nails and animal nails, and both wound and normal nails are sent to the point where the tip of the nail is cut, from the base of the nail to the tip. Cut an appropriate position from the tip (hereinafter referred to as the nail length direction). However, the reason why the nail is difficult to cut is that even if it is sent from the tip of the nail to the cut portion, the tip is biting into the meat.

  In the point which sends the middle part of the nail | claw length direction of a winding nail to a cutting part, since the front-end | tip of the collar pieces 71 and 72 is open | released, the skew blade type nail clipper 70 of patent document 2 is easy. However, in the nail clipper 70 of the skew blade type patent document 2, the tips of the flange pieces 71 and 72 come into contact with, for example, meat, and the blade portions 71a and 72a are located at the deep ends of the flange pieces 71 and 72. There is a problem that the nail cutting portion cannot be positioned in the vicinity of the support shaft 73, or the meat is sandwiched between the tips of the flange pieces 71 and 72.

  Further, the skew blade type nail clipper 70 of Patent Document 2 is not limited to the cutting of the wound nail, but has a fundamental problem different from the above. Here, a general principle of cutting sushi such as stationery items will be described. A scissors cuts a to-be-cut | disconnected object, when both blade parts approach diagonally.

  For example, in the case of FIG. 7, the cutting is performed so that one blade (hereinafter referred to as the blade portion 71a) and the other blade (hereinafter referred to as the blade portion 72a) are rubbed so that the blade portions 71a and 72a are covered. The object to be cut as it moves relative to the cut object and moves in the direction in which each of the blade portions 71a and 72a located on the upper (right) blade and the lower (left) blade is operated. This is due to the shearing force acting alternately.

  Therefore, the thin object to be cut is cut by moving the blade portions 71a and 72a relative to the object to be cut (as by a cutter or a knife) before the shearing force becomes apparent. On the other hand, when cutting a thick and hard object to be cut, it cannot be cut by the movement of the blade portions 71a and 72a relative to the object to be cut, and at this time, a shearing force becomes apparent.

  The manifestation of this shearing force becomes a factor that the wrinkles cannot be cut or that the sharpness of the wrinkles deteriorates. In other words, the shearing force is not only when cutting thick and hard workpieces, but also due to structural defects such as rusting of blades and blade wear such as blade spillage, and gaps in the overlapping direction of both blades when cutting both blades. , Also manifests in the same way.

  In other words, when cutting thick and hard workpieces, cutting cannot be performed only by the relative movement of the blades, and shearing force becomes apparent. Therefore, the skew blade type nail clipper 70 of Patent Document 2 is (thick nail, A claw (including a hard claw), that is, a tip part bites into meat, and a cut part cannot be reliably cut at a middle part in a claw length direction that is so thick and hard that it can no longer be called a tip part.

  For example, in the skew blade type nail clipper 70 of Patent Document 2, even if the length of the hooks 71 and 72 in the tip direction is short and the claw can be sent to the back of the blade portions 71a and 72a, Since the intermediate portion in the lengthwise direction of the wound nail is sandwiched, the hardness of the original nail (bone) and the thickness (thickness) due to the intermediate portion are added, and it cannot be easily cut only by the relative movement of the blade portions 71a and 72a.

  As a result, when the cutting can not be easily cut only by the relative movement of the blades 71a and 72a, the shearing force becomes obvious, and when the depth of the blades 71a and 72a precedes and the interval narrows obliquely, The pieces 71 and 72 escape in the direction of the tip (or the entire nail clipper 70 escapes from the claws) and cannot be cut.

  In the above, even if the claw does not escape in the tip direction, it cannot be easily cut only by the relative movement of the blade portions 71a, 72a. As another example of the manifestation of the shearing force, for example, the claw cannot be cut and the blade When the parts 71a and 72a are alternately distorted in the vertical direction (or left and right) and the degree of distortion is large, a phenomenon occurs in which the claws are broken or crushed.

  As another example of the manifestation of the shearing force, even if the claw is not distorted as described above, the claw rotates in the same horizontal plane as the approach direction of each of the blade portions 71a and 72a, this phenomenon Along with this phenomenon, the gap between the blade portions 71a and 72a opens, or a phenomenon in which the entire nail clipper 70 rotates to the same horizontal plane as the length direction of the nail occurs due to stress, and in any case, cutting cannot be performed successfully.

  In this respect, the straight blade type nail clipper 60 as in Patent Document 1 does not require the relative movement of the lower blade 63 and the upper blade 65 with respect to the object to be cut. There is no problem as in Patent Document 2 because the blade is brought into contact with the portion and sheared (cut off).

  That is, in the straight blade type nail clipper 60 as in Patent Document 1, the lower blade 63 and the upper blade 65 bite into the nail (cutting object) at almost the same location due to the shearing force and are cut off. And the nail clipper 60 of patent document 1 forms the lower blade 63 and the upper blade 65 so that it may bite into a nail easily.

  However, the straight blade type nail clipper 60 as in Patent Document 1 needs to insert the nail (tip) into the insertion hole 65a that does not have a notch on the inner periphery. Since the tip of the nail cannot be inserted into the insertion hole 65a, that is, the wound nail cannot be positioned at the cutting location, the wound nail could not be cut as a result.

  The problem to be solved by the present invention is that in the slanted blade type nail clipper of Patent Document 2, a shearing force is manifested in order to cut a thick and hard nail in the middle of the nail length like a nail. In addition to various problems associated with the cutting, the cutting itself is difficult, the problem that the nail cannot be located at the place where both blades are located (near the fulcrum), or the problem of cutting with meat sandwiched between them There is a point, and in the straight blade type nail clipper of Patent Document 1, since the tip of the nail is sent from the tip of the nail to the cut portion, the tip that bites into the meat of the wound nail cannot be sent to the cut portion.

In order to achieve the above object, the cutting tool of the present invention includes a main body, a holding hole for holding the fixed blade and the moving blade in a stacked state, and an adjustment hole formed in a facing portion of the holding hole in the stacking direction. And a gripping part that is gripped by a hand and operated for cutting, and an operating piece that transmits the operating power of the gripping part to the moving blade. A cutting part that is positioned and cut by the blade part, a fixing hole formed at a midway point in the front-rear direction, a rail formed at a part extending from the rear end to the vicinity of the fixing hole in order to guide the movement of the working piece, The moving blade has a cutting portion formed at the tip portion in the front-rear direction and cuts the object to be cut by the blade portion, and a guide hole that is formed at an intermediate position in the front-rear direction and guides the front-rear movement of the moving blade And a locking hole formed at the rear end for locking the operating piece, Luo, the cut portion of the fixed blade is notched in a portion of the range of 90 ° ± 45 ° with respect to the longitudinal direction form, one end of the cutout opposite ends of the cutout portion and the other end On the other hand, the greatest feature is that it protrudes in a direction perpendicular to the front-rear direction .

  According to the above configuration, the cutting tool according to the present invention has the cutout portion formed in the cutting portion of the fixed blade, so that the tip portion bites into the meat like a wound claw, that is, the tip portion is sent to the cutting location. Even in situations where it is difficult, the intermediate part in the claw length direction can be sent from the cutout part to the cutting part, and since it is a straight blade type, the wound claw can be cut reliably.

  Here, the reason why the positions of the notches are formed in a range of 90 ° ± 45 ° with respect to the front-rear direction will be described. In the present invention, a direction orthogonal to the front-rear direction is defined as a 90 ° position, and this is hereinafter defined as a reference 0 ° position. The angle in the positive direction means the angle rotated in the front end direction, and the angle in the negative direction means the angle rotated in the rear end direction.

  When the notch is formed at a position larger than + 45 ° (rotated toward the tip) from the reference 0 ° position with respect to the front-rear direction, it is almost the tip, and even if the notch is formed at this position, it goes straight It cannot be cut with a claw between the moving blade and the fixed blade. On the other hand, if it is formed at a position with an angle smaller than −45 ° (rotated in the rear end direction) from the reference 0 ° position, the tip portion that presses against the meat becomes large, and the notch portion unless the tip is pressed strongly against the meat The nail cannot be positioned until.

  Further, the cutting tool of the present invention is a screw that reaches the fixed hole through the guide hole from the adjustment hole on the moving blade side of the holding hole after the fixing hole, the guide hole, and the adjustment hole in the holding hole are in communication with each other. The fixed blade can be brought closer to the moving blade by screwing the bolt or by arranging bolts and nuts on both outer sides of the opposing portion of the holding hole and tightening the bolt through the guide hole and the fixed hole. Therefore, the movable blade comes into close contact with the fixed blade, and the blades are reliably engaged with each other, and the workpiece can be cut surely and easily.

  In addition, since the screws and bolts (hereinafter collectively referred to as “screws”) are inserted through the guide holes of the moving blade, the movement of the moving blade in the direction orthogonal to the forward / backward direction can be restricted. Moreover, since the movement of the working piece accompanying the operation of the gripping part is restricted by the rail of the fixed blade, the operation itself is also stable. Furthermore, since the movable blade and the fixed blade are held in a stacked state by the holding holes, the movement of the movable blade and the fixed blade in the shake direction can be reliably prevented.

  Moreover, since the cutting tool of this invention has attached the fixed blade and the moving blade with the screw as described above, the fixed blade can be extracted from the holding hole only by removing the screw. In addition, since the screw is inserted into the guide hole and the operating piece is engaged with the locking hole, the moving blade engages with the operating piece after removing the screw and retracting the lower blade into the holding hole. If it is removed from the stop hole, it can be extracted from the holding hole.

  That is, the cutting tool of the present invention can easily take out the movable blade and the fixed blade simply by removing the screw without disassembling the whole, particularly each part of the main body. Then, if the above is reversed, it is possible to attach a moving blade or a fixed blade that has been replaced. In addition, the adjustment of the contact degree between the movable blade and the fixed blade after replacement can be easily performed as described above.

FIG. 1 is a perspective view showing the entire cutting tool of the present invention. Example 1 FIG. 2 is an exploded perspective view of the cutting tool of the present invention. Example 1 3 (a) to 3 (c) are diagrams for explaining the usage of the cutting tool of the present invention. Example 1 FIG. 4 is an exploded perspective view showing another configuration of the cutting tool of the present invention. (Example 2) FIG. 5 is an exploded perspective view showing still another configuration of the cutting tool of the present invention. (Example 3) FIG. 6 is a view showing a conventional cutting tool. FIG. 7 is a view showing a conventional cutting tool. It is a disassembled perspective view of the conventional cutting tool.

  The cutting tool of the present invention is different from a thin and relatively soft nail such as a human nail, in that it cuts a hard animal nail having a large cross-sectional thickness, and the tip is cut into a meat like a wound nail. The problem of not being able to be fed to the location has been solved by forming a notch in a part of the cutting portion of the fixed blade in the direction perpendicular to the front-rear direction in the configuration of the straight blade type. With this configuration, even a wound claw that does not have an end portion can be reliably cut by a moving blade that goes straight through the notch portion to the cutting portion and moves straight in the claw length direction.

  Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 shows a configuration corresponding to claim 3 adopting claims 1 and 2 of the present application, and Example 2 shown in FIG. 4 shows a configuration corresponding to claim 1 of the present application. Example 3 shown in FIG. 5 shows a configuration corresponding to claim 2 in which claim 1 is adopted.

  In the second and third embodiments, the same components as those in the previous embodiment are denoted by the same reference numerals and the description thereof is omitted. In the first to third embodiments, the cutting tool of the present invention will be described as a “nail clipper” that cuts animal nails, particularly wound claws.

  The nail clipper 10 according to the first embodiment shown in FIGS. 1 to 3 includes a fixed blade 11, a moving blade 12, and a main body 13 as main components, and moves the moving blade 12 straight with respect to the fixed blade 11 (coiled). Is configured as follows.

  In the fixed blade 11, the tip of the moving direction of the movable blade 12 (hereinafter referred to as the front-rear direction and the front side in the front-rear direction is the front side) protrudes in a direction perpendicular to the front-rear direction. In the first embodiment, it is assumed that the protruding direction to one side is for right-handed use, and for left-handed use, it may be protruded to the opposite side and for both-handed use to protrude to both sides.

  A cutting portion 11a is formed at the protruding portion at the tip of the fixed blade 11, and a blade 11b is formed at the rear end of the cutting portion 11a. In the first embodiment, the protruding amount of the cutting portion 11a is set larger by about 0.5 to 1.0 mm (α in the drawing) than the movable blade 12.

  Further, the leading end 11aa in the protruding direction of the cut portion 11a is arcuate, and the side portion 11ab is linearly parallel to the front-rear direction. Further, an end portion (that is, the tip end) 11ac opposite to the tip end 11aa in the side portion 11ab is also arcuate.

  Further, the fixed blade 11 is formed with a fixed hole 11c into which a screw B for attaching the fixed blade 11 and the movable blade 12 to the holding portion 13A of the main body 13 is inserted in the middle part in the front-rear direction reaching the tip. Yes. Furthermore, a rail 11d that guides an operating piece 16 to be described later is formed from the rear end portion in the front-rear direction of the fixed blade 11 toward the middle portion.

  The movable blade 12 is stacked on the back side of the fixed blade 11 and is held by the holding portion 13A of the main body 13 together with the fixed blade 11 so as to be linearly slidable in the front-rear direction. The movable blade 12 has a tip portion protruding in one direction in the same direction as the fixed blade 11 in a direction orthogonal to the front-rear direction. That is, the distal end portion of the movable blade 12 is in a state of protruding along with the protruding direction of the fixed blade 11 on one side for right-handed use, the other side for left-handed use, and both sides for both-handed use.

  A cutting portion 12a is formed at the protruding portion at the tip of the movable blade 12, and a blade 12b is formed at the tip of the cutting portion 12a. Furthermore, the tip 12aa in the protruding direction of the cutting part 12a has a spire shape and is slightly curled toward the inner peripheral side of the cutting part 12a.

  The movable blade 12 is elongated in the front-rear direction to guide the front-rear movement of the movable blade 12 by the screw B by inserting the screw B in the middle of the front-rear direction reaching the tip. A guide hole 12c is formed. Furthermore, a locking hole 12d that engages an engaging portion 16a of an operating piece 16 to be described later is formed at the rear end of the movable blade 12 in the front-rear direction.

  In the first embodiment, the cut portion 11a of the fixed blade 11 and the cut portion 12a of the movable blade 12 are separated from each other, and a notch is formed in a space generated between the tips 11aa and 12aa before the claw is cut. C is formed. In the first embodiment, the cutout portion C has a direction perpendicular to the front-rear direction (= 90 °: reference 0 ° position) as the center of the cutout interval. A nail | claw is sent between the cutting part 11a and the cutting part 12a via this notch part C.

  The main body 13 has a holding portion 13A for holding the fixed blade 11 and the movable blade 12 at the front and rear end portions, and a pivoting portion 13B for stopping an operation rod 15 to be described later at a midway point in the front and rear direction. In addition, gripping portions 13C for the user to grip the whole are formed.

  The holding hole 13Aa is formed by folding the holding portion 13A in the center in a direction perpendicular to the front-rear direction while forming a thickness that allows the fixed blade 11 and the movable blade 12 to be stacked and inserted. And adjustment hole 13Ab is formed in the center part which turned together the folding piece which forms holding hole 13Aa, and the surface facing this center part. The adjustment hole 13Ab is formed corresponding to the fixed hole 11c of the fixed blade 11 and the guide hole 12c of the movable blade 12.

  In the first embodiment, the screw B is, for example, from the adjustment hole 13Aa on the movable blade 12 side of the holding portion 13A, from the adjustment hole 13Aa on the fixed blade 11 side of the holding portion 13A, via the guide hole 12c and the fixed hole 11c. It protrudes and is screwed into the nut N here. Therefore, by tightening the screw B, the upper and lower intervals of the holding hole 13Aa are narrowed, and the fixed blade 11 and the movable blade 12 are in close contact with each other. By doing in this way, it becomes possible to adjust the adhesion degree of the fixed blade 11 and the movable blade 12 easily.

  The screw B does not need to be screwed into the nut N, that is, does not protrude from the adjustment hole 13Ab on the fixed blade 11 side. For example, the screw B may be directly screwed into the fixed hole 11c of the fixed blade 11. If the fixed blade 11 is reached via the movable blade 12, the adjustment hole 13Ab on the fixed blade 11 side may be omitted.

  The pivot stop 13 </ b> B is formed by bending a direction perpendicular to the front-rear direction in the main body 13 in a direction substantially perpendicular to the surfaces of the fixed blade 11 and the movable blade 12. A gap leaving the required thickness of the operating rod 15 is formed between the bent tops. Further, the fulcrum portion 15A of the operating rod 15 is inserted into the gap at the top.

  Further, each of the bent top portions of the pivot stop portion 13B is formed with a pivot hole 13Ba into which a pin P1 for pivotally supporting a fulcrum portion 15A of the operating rod 15 described later is inserted. In addition, the gripping portion 13C has an engagement piece 13ca formed at an intermediate position in the front-rear direction on the side facing the operation rod 15, and the other end of the spring SP is engaged with the engagement piece 13Ca.

  The operating rod 15 is bent in a direction orthogonal to the front-rear direction of the tip so that it is substantially orthogonal to the fixed blade 11 and the movable blade 12, and the bent holes 13Ba, The locking holes 15Aa and 15Aa corresponding to 13Ba are formed, and the locking holes 15Ab corresponding to the locking holes 16b of the operating piece 16 are formed.

  The pin P1 is inserted into the pivot holes 13Ba and 13Ba of the pivot section 13B and the pivot holes 15Aa and 15Aa of the operating rod 15. Therefore, the operating rod 15 is pivotally supported on the pivot portion 13B of the main body 13 by the pin P1. Further, the operating rod 15 has a grip portion 15B formed on the opposite side of the fulcrum portion 15A in the front-rear direction. The nail clipper 10 is gripped by the user with the grip portion 15B of the operating rod 15 and the grip portion 13C of the main body 13.

  In the present invention, the fulcrum portion 15A of the operating rod 15 is pivotally supported at a position far away from the holding portion 13A and does not have a separate cover. And the holding part 13A are prevented from being pinched by the user's finger.

  The operating piece 16 inserted inside the bent portion of the fulcrum portion 15A of the operating rod 15 converts the arc motion of the locking hole 15Ab in the fulcrum portion 15A of the operating rod 15 into a linear motion. The operating piece 16 has an engaging portion 16 a formed at the tip thereof, and the engaging portion 16 a engages with the locking hole 12 d in the movable blade 12.

  Further, the operating portion 16 is formed with locking holes 16b corresponding to the locking holes 15Ab and 15Ab of the operating rod 15 at a midway position in the front-rear direction. The locking pin P2 is inserted through the locking hole 15Ab, the locking hole 16b, and the locking hole 15Ab in this order. Further, an engagement hole 16c that engages one end of the spring SP whose natural length is shortened is formed in the vicinity of the locking hole 16b of the operating piece 16.

  The nail clipper 10 having the above configuration is used as shown in FIG. First, the tip 11aa is hooked on the cutting portion 11a of the fixed blade 11 from the radial direction of the nail in the middle of the nail length direction of the animal's wound nail. At this time, as shown in FIG. 3 (a), the end 11ac to be brought into contact with the meat is formed in an arc shape, so that even if the end 11ac is strongly pressed against the meat, it is not pierced and damaged by the meat. .

  Moreover, since the cutting parts 11a and 12a protrude in the direction orthogonal to the front-rear direction, it is easy to operate with the gripping part 13C and the gripping part 15B gripped. Further, by forming the cutout portion C, it becomes easy to position the midway portion of the wound claw in the claw length direction to the cut portions 11a and 12a.

  When the tip 11aa is positioned at the lower chord part in the cross section of the nail, as shown in FIG. 3B, the entire nail clipper 10 is rotated so that the side portion 11ab is parallel to the meat, and the tip 11aa is Get in between the meat. At this time, the side portion 11ab is rotated while being pressed against the meat. However, since both the tip 11aa and the end 11ac are formed in an arc shape, the tip 11aa and the end 11ac are not pierced and damaged by the meat.

  Further, the side portion 11ab is formed in a straight line parallel to the front-rear direction, and the protruding amount of the distal end portion of the fixed blade 11 in the protruding direction is larger than the moving blade 12 by α, thereby making the side portion 11ab flesh. As long as they are pressed, meat is not sandwiched between the tip 11aa and the tip 12aa at the time of cutting described later. In the state of FIG. 3B, the winding claws are positioned on the cutting portion 11 a of the fixed blade 11 and the cutting portion 12 a of the movable blade 12 through the notch portion C.

  Thereafter, an operation is performed so that the grip portion 15B approaches the grip portion 13C. At this time, the locking hole 15Ab of the fulcrum 15A of the operating rod 15 moves downward and forward in an arc shape. With the arc motion of the locking hole 15Ab of the fulcrum 15A in the operating rod 15, the tip end portion (engagement portion 16a) of the operating piece 16 tries to move in an arc shape that advances forward while facing the pin P2. And it is converted into a linear motion only in the front-rear direction by the locking of the engaging portion 16a and the locking hole 12d.

  The operation at this time will be described in more detail. The movable blade 12 is accommodated almost entirely with the tip portion remaining in the holding hole 13Aa of the holding portion 13A. At this time, the engaging portion 16 a of the operating piece 16 is positioned at the rear end of the rail 11 d of the fixed blade 11 in a state of being locked in the locking hole 12 d of the movable blade 12.

  As described above, when the gripping portion 15B of the operating rod 15 is operated so as to approach the gripping portion 13C of the main body 13, the engagement portion 16a of the operating piece 16 is locked in the locking hole 12d of the movable blade 12. Thus, the fixed blade 11 moves to the front end of the rail 11d.

  That is, the nail clipper 10 of the present embodiment regulates the left and right movement of the engaging portion 16a of the operating piece 16 with respect to the front and rear direction by the rail 11d of the fixed blade 11, and the screw B is inserted into the guide hole 12c of the movable blade 12. Therefore, when the movable blade 12 moves back and forth, the movable blade 12 is restricted from moving left and right, so that the movable blade 12 moves straight from the holding portion 13A (holding hole 13Aa) of the main body 13.

  When the moving blade 12 moves straight relative to the fixed blade 11, the cutting portion 12a of the moving blade 12 approaches the cutting portion 11a of the fixed blade 11 as shown in FIG. At this time, the amount of protrusion of the fixed blade 11 in the protruding direction in the protruding direction is larger than the moving blade 12 by α, and the side portion 11ab is linear in the front-rear direction, so that the tip 11aa and the tip 12aa The nail is rubbed by the tip 12aa of the movable blade 12 and is guided to the cutting part 12a without sandwiching meat.

  Then, from the state shown in FIG. 3C, the blade 12b and the blade 11b bite into the nail at substantially the same position without relatively moving, and the shearing force at this time causes the blade to be shown in FIG. 3D. In addition, the nails are easily and reliably cut. Further, both of the movable blades 12 that advance straight with respect to the fixed blade 11 are formed with blades 11b and 12b, which cut into almost the same portion of the nail and cut off, so that the nail is not crushed or distorted. Cutting is possible.

  Further, the nail clipper 10 according to the present embodiment has, for example, the configuration of the first embodiment, and when the screw B is tightened, the vertical distance between the holding holes 13Aa of the holding portion 13A is narrowed. 11 is in close contact. Therefore, the nail clipper 10 of the present embodiment can adjust the degree of adhesion between the movable blade 12 and the fixed blade 11 with the degree of tightening of one screw B.

  Further, the nail clipper 10 of the present embodiment can remove the fixed blade 11 from the holding hole 13Aa in the main body 13 by removing the screw B, and the moving blade 12 is retracted to the holding portion 13C side in the holding hole 13Aa. Then, if the engagement state between the engagement portion 16a of the operating piece 16 and the engagement hole 12d of the movable blade 12 is released, the operation piece 16 can be extracted from the holding hole 13Aa.

  Moreover, what is necessary is just to do as follows to attach the replaced fixed blade 11 to the main body 13 again. That is, the fixed hole 11c and the adjustment hole 13Ab are communicated, the replaced movable blade 12 is attached to the main body 13 again, and the movable blade 12 is retracted into the holding hole 13Aa to be engaged with the engaging portion 16a of the operating piece 16. After locking the hole 12d, the movable blade 12 is advanced in the holding hole 13Aa, the guide hole 12c is communicated with the adjustment hole 13Ab and the fixing hole 11c, and the screw B is inserted.

  As described above, the nail clipper 10 of this embodiment can easily remove the movable blade 12 and the fixed blade 11 without removing the pins P1 and P2 or almost completely disassembling the whole. The movable blade 12 and the fixed blade 11 can be easily attached, and after the replacement, the degree of adhesion between the movable blade 12 and the fixed blade 11 can be adjusted as described above.

  Although not shown, the first embodiment shows the configuration of claim 3 adopting claims 1 and 2 of the present invention. However, when the configuration of claim 3 adopting claim 1 is used, In the cutting part C, the protrusion α difference α in the direction perpendicular to the front-rear direction of the fixed blade 11 with respect to the movable blade 12 is omitted. In this case, although there is a possibility of slightly sandwiching the meat, the shape of the tip 11aa of the fixed blade 11 and the tip 12aa of the movable blade 12 can be used safely without cutting the meat.

  The second embodiment shown in FIG. 4 has a configuration corresponding to claim 1 of the present application. Compared with the first embodiment, the fixed blade 21 and the moving blade 22 are linear, and the notch C2 The difference is that a part of the cutting part 21a formed at the tip part of the fixed blade 21 is cut out in a direction orthogonal to the front-rear direction (90 ° = reference 0 ° position with respect to the front-rear direction). To do.

  That is, in the second embodiment shown in FIG. 4, first, the blade 11b is formed on the inner peripheral portion of the cutting portion 21a, while the concave cutting portion 22a is formed on the distal end portion of the movable blade 22, and the cutting portion 22a A blade 12b is formed at the tip. In the second embodiment, the difference (α) in the protrusion amount in the direction perpendicular to the front-rear direction of the cut-out end face of the cut-out portion 21a forming the cut-out is omitted in the cut-out portion C2.

  The nail clipper 10 according to the second embodiment configured as described above projects the distal end portions of the fixed blade 11 and the movable blade 12 in the first embodiment in a direction perpendicular to the front-rear direction, and each of the cutting portions 11a and 12a. Except for the effect of forming the notch portion C in the separated state and the effect of the difference α in the protrusion amount in the direction perpendicular to the front and back direction of the other notch in the notch portion C2. The effect of this can be obtained.

  That is, in the second embodiment, as in the first embodiment, it is possible to adjust the effect of hooking the wound claw and cutting it securely, and the degree of adhesion of the movable blade 22 with the fixed blade 21. The point which can be moved stably and can replace | exchange the moving blade 22 and the fixed blade 21 easily can be obtained equally.

  Example 3 shown in FIG. 5 is a configuration corresponding to claim 2 adopting claim 1 of the present application, and in Example 2 described above, one and the other of the butted end surfaces of the cutting part 21a forming the notch part C2 A difference α in the protrusion amount in the direction orthogonal to the front-rear direction is provided.

  The nail clipper 10 according to the third embodiment configured as described above projects the distal end portions of the fixed blade 11 and the movable blade 12 in the first embodiment in a direction perpendicular to the front-rear direction, and each of the cutting portions 11a and 12a. Except for the operational effect due to the formation of the notch C in the separated state, the same operational effect can be obtained.

  That is, in the third embodiment, as in the first embodiment, it is possible to adjust the effect of hooking the wound claw and cutting it with certainty, and the degree of adhesion between the movable blade 22 and the fixed blade 21, and the movable blade 22 can be adjusted. The point which can be moved stably and can replace | exchange the moving blade 22 and the fixed blade 21 easily can be obtained equally.

  Examples 1 to 3 have been described as nail clippers for cutting animal nails, especially wound nails. However, for example, it is also suitable for use in applications such as cutting a resin-molded product (having no end). It is.

10 Nail clippers (cutting tools)
11 fixed blade 11a cutting portion 11aa tip 11ab side portion 11ac end portion 11b blade 11c fixed hole 11d rail 12 moving blade 12a cutting portion 12aa tip 12b blade 12c guide hole 12d locking hole 13 main body 13A holding portion 13Aa holding hole 13Aa holding hole 13A Actuating piece 16a Engagement part 21 Fixed blade 21a Cutting part 22 Moving blade 22a Cutting part C Notch part C2 Notch part α Difference in protrusion amount in the direction orthogonal to the front-rear direction

Claims (2)

A cutting tool having a fixed blade and a moving blade in a main body, and cutting the workpiece by moving the moving blade linearly relative to the fixed blade, wherein the main blade includes the fixed blade and the moving blade. Holding holes that are held in a stacked state, adjustment holes that are formed at the opposing portions of the holding holes in the stacking direction, gripping portions that are gripped and cut by hand, and operating power of the gripping portions is transmitted to the moving blade An operating piece that is formed on the fixed blade in the front-rear direction, a cutting portion that positions the object to be cut and is cut by the blade portion, and a fixing hole that is formed in the middle in the front-rear direction, In order to guide the movement of the working piece, a rail is formed in a part extending from the rear end to the vicinity of the fixed hole, and the moving blade is formed at a front end part in the front-rear direction, It is formed at the cutting part to be cut by the blade part, and in the middle of the front-rear direction A guide hole that guides the front and rear movement of the moving blade, a locking hole that is formed at the rear end portion and that locks the operating piece, and further, is 90 with respect to the front and rear direction of the cutting portion of the fixed blade. A notch is formed in a part of the range of ± 45 °, and one end of the notch ends of the notch protrudes in a direction perpendicular to the front-rear direction with respect to the other end. Cutting tool characterized. The notch portion is formed by protruding each cutting portion of the fixed blade and the moving blade to one side or both sides in a direction orthogonal to the front-rear direction and spaced from each other. The cutting tool according to claim 1.

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