JP2018196710A - cutter knife - Google Patents

Abstract

To provide a cutter knife enabling a notch with highly accurate depth to be formed in a stable state by simple operation, and enabling a cutting object member to be safely cut in accordance with the thickness thereof.SOLUTION: The cutter knife is provided that comprises: a blade having an engaging hole; a blade holder having an engaging hole; a blade slider; a holder cover for storing the blade holder; a fulcrum shaft with which the blade holder is pivotally supported by the holder cover; a pair of front-rear magnet rollers and attracts the blade holder in the blade edge direction with magnetic force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cutter knife that forms an incision by urging the tip of a blade with respect to an object to be cut at a constant angle and a constant urging force.

  A cutter knife has been proposed in which a part of a blade is pressed by a spring to press the tip of the blade against a cutting site with a predetermined pressure. For example, in order to obtain a biasing force acting on the tip of the blade, a method of adjusting the pressing force of a spring provided at the rear end of the blade in a state where the tip of the blade holder is in contact with the cutting site (for example, Patent Document 1). Furthermore, by keeping the blade holder in a neutral position constant by the repulsive force of the spring and the repulsive force of the permanent magnet, the fluctuation of the force applied to the blade holder is absorbed and the pressing force applied to the tip of the blade is kept constant (for example, Patent Document 1).

  In addition, a method has been proposed in which a part of the ridge on the side opposite to the blade tip is pushed by a spring while the sliding contact portion is pressed against the part to be cut at a predetermined angle (see Patent Documents 2 and 3). ). In these methods, sliding is performed while pressing the blade holder opening tip or the guide portion against the member to be cut. For this reason, damage to the sliding portion has been a problem on the surface of the cut member which is easily damaged and which has been printed or thin-film coated.

  There has been proposed a ceramic plate cutter in which a roller blade holding portion and a handle portion are fixed to a wheeled main body, and the angle and pressing force of the roller blade can be kept constant (for example, Patent Document 4). In such a method, the possibility of damaging the surface of the member to be cut is low as compared with the sliding angle adjusting method. On the other hand, it is necessary to keep the pressing force constant by controlling the pressing force by hand. However, it has been difficult to quantitatively control the pressing force by adjusting the hand force.

  As a method for cutting a thin film, the inventor uses a force that a magnet provided on the back side of a member to be cut attracts the blade in the direction of the blade edge to urge the blade tip toward the cut portion, and in that state the blade Or a method of cutting the coating film by moving one of the members to be cut (Patent Document 5). However, when the thickness of the member to be cut is several millimeters or more, or when the shape of the member to be cut is a solid or a spherical surface, it is difficult to cut.

  As a method for forming a stable incision, the present inventor has a plurality of blades having engagement holes, a fulcrum shaft that is attached in parallel to the blade thickness direction, and is attached to the fulcrum shaft. And a blade holder for storing the blade, wherein a magnet is disposed between the blade edge of the blade and the coating film to be tested, and the blade is attracted in the direction of the blade edge by the magnetic force of the magnet. (Patent Document 6). This method is a device that simultaneously forms a plurality of cuts with a plurality of blades in the coating film. However, by changing the blades used for cutting to one and changing the other blades to spacer plates or short blades, the thin film is formed. It is also possible to cut safely at a constant angle and a constant biasing force.

JP 2006-68062 A Japanese Utility Model Publication No. 07-9262 JP 2010-264004 A JP2015-58539A JP 2012-18142 A International Publication No. 2017/007034

In applying the test apparatus exemplified in Patent Document 6, the following problems have been clarified.
(A) The use of a general-purpose blade made of a non-magnetic material such as ceramic is limited.
(B) Since it is an apparatus for making a cut into the coating film, there is room for improvement in the adjustment width of the cut depth in order to cut an object such as paper.
(C) Since straightness is high, there is room for improvement in accurately cutting and cutting the free curve.
(D) As a countermeasure when the sharpness of the blade is deteriorated, the blade must be replaced, and there is room for improvement as compared with the method of making a new cutting edge by folding the cutting edge using the blade folding groove. .
The present invention has been made to solve these problems.

The above-described problems of the present invention have been solved by the following invention.
(1) A blade having an engagement hole is provided, a blade holder having an engagement hole is provided, a blade slider is provided, a holder cover in which the blade holder is stored is provided, and the blade holder is pivotally attached to the holder cover. A fulcrum shaft, and at least a pair of front and rear magnet rollers for urging the member to be cut, wherein the blade holder is attracted in the direction of the blade edge by the magnetic force of the magnet roller provided close to the blade holder. It is a cutter knife.
(2) At least one magnet is provided between the blade holder and the member to be cut, the magnet is in sliding contact with the holder cover, and selection of the magnetic force or number of the magnet and the magnet from the fulcrum shaft It is preferable to adjust the cutting force by adjusting the force for sucking the blade holder toward the blade edge by selecting the distance.

  With the cutter knife of the present invention, a highly precise depth of cut can be formed in a stable state with a simple operation, and can be safely cut according to the thickness of the member to be cut.

FIG. 1 is a schematic perspective side view showing an example of a cutter knife of the present invention. FIG. 2 is an exploded perspective view of the cutter knife shown in FIG. FIG. 3 is a front perspective view of the cutter knife shown in FIG. 4 is a rear perspective view of the cutter knife shown in FIG. FIG. 5 is a left side view showing another example of the cutter knife of the present invention. FIG. 6 is a front perspective view of the cutter knife shown in FIG. FIG. 7 is a perspective view showing an example of a cutting method using the cutter knife and ruler shown in FIG. FIG. 8 is a front view of the cutting method shown in FIG. FIG. 9 is an exploded front perspective view showing still another example of the cutter knife of the present invention. 10 is a rear perspective view of the cutter knife shown in FIG. FIG. 11 is an exploded perspective view showing an example in which a spherical magnet roller is used in the cutter knife of the present invention. 12 is a front perspective view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an example of a schematic perspective side view showing a basic configuration of a cutter knife of the present invention. 2, 3, and 4 are an exploded perspective view, a front perspective view, and a rear perspective view of the cutter knife of FIG. 1, respectively. 1 to 4, the cutter knife 1 includes a blade holder part and a holder cover part. The blade holder portion includes a blade 10 having an engagement hole 12, a blade holder 20 having an engagement hole 22, and a blade slider 30 having an engagement protrusion 32 as basic configurations. On the other hand, the holder cover part is provided with a holder cover 40, a fulcrum shaft 50, magnet rollers 60 and 62, rotating shafts 52 and 54, and magnets 70 and 71 as a basic configuration. The outer sides of the magnets 70 and 71 can be covered with magnet sliders 72 and 73 as necessary.

  1 to 4, the blade 10 having the engagement hole 12 is disposed in the blade holder 20 having the engagement hole 22. The engagement hole 12 is engaged with the engagement protrusion 32 of the blade slider 30. The blade holder 20 is housed in the holder cover 40 so that the cutting edge 14 of the blade 10 in the blade holder 20 faces downward. The engagement hole 22 of the blade holder 20 is pivotally attached to the fulcrum shaft 50. In the blade holder 20, it is preferable that the whole or a part of the lower surface (surface close to the blade edge) 24 of the blade holder is made of a soft magnetic material. The magnet rollers 60 and 62 are pivotally attached to the rotary shafts 52 and 54, respectively, and are disposed on the bottom surface of the holder cover 40. The magnets 70 and 71 are in sliding contact with the holder cover 40. Magnets 70 and 71 are positioned by operating magnet sliders 72 and 73, respectively. The magnets 70 and 71 can be removed from the rear part of the holder cover 40.

  An example of how to use the cutter knife 1 shown in FIG. 1 will be described. In a state where the front-wheel magnet roller 62 is not in contact with the member to be cut, the blade slider 30 is moved toward the tip of the blade holder 20, and the tip 16 of the blade is protruded from the blade holder 20 by an appropriate amount. Next, the member to be cut is grounded in the order of the magnet roller 60, the blade tip 16, and then the magnet roller 62. By placing a magnetic material plate or the like on the back surface of the member to be cut, the cutter knife 1 can stand on its own by a magnet roller.

  In order to form a cut with respect to the member to be cut, the presence or absence and position of the magnets 70 and 71 are arbitrarily set according to the material, thickness or depth of cut of the member to be cut, and the magnet rollers 60 and 62 are used as the members to be cut Pull the cutter knife forward while taking care not to leave it. The presence and position of the magnets 70 and 71 are preferably confirmed by trial cutting in advance. When the cut can be formed only by the magnetic force of the magnet roller 60, the magnets 70 and 71 may be removed and used. The magnets 70 and 71 are positioned by sliding the magnet sliders 72 and 73, respectively. The magnet sliders 72 and 73 are preferably made of a soft magnetic material, but in the case of a non-magnetic material, they may have soft magnetic material plates 74 and 78, respectively.

  FIG. 5 is a left side view showing another example of the cutter knife of the present invention. In FIG. 5, the blade knife 35 is disposed on the side of the cutter knife 2. FIG. 6 is a front perspective view of the cutter knife 2 shown in FIG. 7 and 8 are a perspective view and a front view showing an example of a cutting method using the cutter knife 2 and the ruler shown in FIG.

  The blade holder portion of the cutter knife 2 includes a blade slider 35 having a blade 10, a blade holder 20, and an engagement protrusion 36 as a basic configuration. The blade 10 is engaged with the engagement protrusion 36 of the blade slider 35 in the blade holder 20. The holder cover portion includes a holder cover 41, a fulcrum shaft 51, magnet rollers 60 and 62, rotating shafts 53 and 55, and a magnet 75 as a basic configuration. An opening is provided on the side surface of the holder cover 41, and the blade holder 20 is pivotally attached to the fulcrum shaft 51. The holder cover 41 has two blade holder storage portions on the left and right sides, and can be used properly according to the hand holding the cutter knife. When holding the cutter knife with the left hand, the blade slider 35 held in the blade holder 20 is pulled to store the blade 10 in the blade holder 20, and the blade slider 35 held in the blade holder 25 is pushed to cut the blade 10. Use it out.

  The bottom surface of the holder cover 41 has a slidable contact portion 91 that can slidably contact the ruler 100. The sliding contact portion 91 is provided outside the blade cutting edge 16 and outside the same plane as the side surfaces of the magnet rollers 60 and 62, so that the blade can be stably covered without damaging the side surface of the ruler 100. The cut 110 can be cut linearly.

  FIG. 9 is an exploded front perspective view showing still another example of the cutter knife of the present invention. 10 is a rear perspective view of the cutter knife shown in FIG. 9 and 10, the blade holder portion of the cutter knife 3 has a blade 11 having a C-shaped engagement hole 13, a blade holder 21, a blade holder grip 26 having an engagement hole 27, and an engagement protrusion 38. A blade slider 37 is provided as a basic configuration. On the other hand, the holder cover portion includes a holder cover 43 having a fulcrum shaft engagement hole 47 and rotation shaft engagement holes 48 and 49, a fulcrum shaft 51, magnet rollers 60 and 62, a yoke 64, rotation shafts 53 and 55, And a magnet 76 are provided as a basic configuration. The outside of the magnet 76 can be covered with a magnet cover 77 as required. When fixing the urging force applied to the cutting edge 17 of the blade 11, the magnet cover 77 can be fixed to the holder cover 43. The magnet is fixed to the magnet cover 77 by bolts 80 and nuts 82.

  The blade holder according to the present invention may have a holder grip integrated so as to cover the blade holder. In that case, the holder grip may have an engagement hole. The material of the holder grip may be a soft magnetic material or a nonmagnetic material such as aluminum or resin. When the holder grip is a nonmagnetic material, the thickness of the lower surface during use is preferably 3 mm or less. When it is 3 mm or more, the attractive force by the magnet becomes weak. Accordingly, the thickness of the lower surface of the grip is preferably 2.5 mm or less, more preferably 2 mm or less.

  FIG. 11 is an exploded perspective view showing an example in which a spherical magnet is used for the magnet roller related to the cutter knife of the present invention. 12 is a front perspective view of the cutter knife shown in FIG. The configuration of the blade holder portion of the cutter knife 4 shown in FIGS. 11 and 12 is the same as that of the cutter knife 3 of FIG. The blade holder portion is inserted from the upper opening of the holder cover 45, and the engagement hole 27 is pivotally attached to the holder cover by the fulcrum shaft 51. The cutter knife 4 has an opening for operating the blade slider 37 on the side of the holder cover 45, and the blade 11 can be pulled out without removing the fulcrum shaft 51 by sliding the blade slider 37 to the rear end. it can. The bottom surface of the holder cover 45 has a hemispherical recess, and is fixed with screws 81 with the spherical magnet rollers 61 and 63 sandwiched between the bottom cover 90. In a state where the bottom cover 90 is screwed, the gap between the spherical magnet and the holder cover 45 is preferably 0.1 to 0.2 microns. The force for urging the cutting edge 17 against the member to be cut is adjusted by the position of the magnet 75. The cutter knife 4 is suitable for cutting a curve because the magnet roller is spherical.

    The blade according to the present invention has an engagement hole that engages with the blade slider at the rear end. The blade may have a plurality of folding grooves. As a material of the blade, materials generally used as replacement blades for cutter knives such as steel, stainless steel, cemented carbide, and ceramic can be used. The shape of the engagement hole of the blade is not particularly limited as long as it engages with the engagement protrusion of the blade slider. In the case of a hard material such as ceramic, a C-shaped engagement hole may be used.

  The material of the blade holder according to the present invention is preferably a steel plate or soft magnetic stainless steel. When using a non-magnetic material such as resin as the blade holder material, the magnet's attractive force can be reduced by providing a soft magnetic material on the lower surface near the tip of the blade holder or the surface of the magnet roller near the blade edge. can get. The distance between the magnet roller or the magnet in sliding contact with the holder cover and the blade holder is preferably 0.1 to 2.5 mm, more preferably 0.3 to 2 mm. The holder cover and the bottom cover are preferably attached in a detachable manner such as screwing so that dirt accumulated in the hemispherical recesses and a spherical magnet roller can be disassembled and cleaned.

  The magnet roller according to the present invention can use a ring-type magnet and a spherical magnet. As a kind of magnet, a neodymium magnet that can obtain a strong magnetic force even with a small size is preferable. Since neodymium magnets are vulnerable to impact, those with metal plating are preferred, and those with resin coating are more preferred. Examples of the resin coat include nylon coat, epoxy coat, and fluororesin coat. The ring-type magnet roller is pivotally attached to the holder cover with a rotating shaft. As the material of the rotating shaft, a magnetic material is preferable.

  The shape of the blade slider according to the present invention is not particularly limited, but a method of incorporating a leaf spring and fixing it in accordance with the wavy shape of the blade holder is preferable. In addition, when the opening for operating the blade slider is not provided on the side of the holder cover, the shape of the blade slider 30 having a G-shaped cross section viewed from the rear end can be operated from the upper surface of the cutter knife. The material of the blade slider can be resin, aluminum or stainless steel, or wood.

  The blade holder part, which is basically composed of a blade holder, a blade and a blade slider, can be removed from the holder cover and used alone if necessary. When folding the blade using the fold groove, pull the blade slider in the direction of the rear end of the blade holder and push the blade holder up from the bottom while the blade cutting edge is stored in the blade holder. The blade holder tip can be removed from the holder cover without removing it. If the magnet slidably contacted with the holder cover is pulled to the rear end, the operation becomes easier.

10, 11 Blade 12, 13 Blade engagement hole 14 Blade edge 20, 21, 25 Blade holder 22, 23, 27 Blade holder engagement hole 30, 35, 37 Blade slider 40, 41, 43, 45 Holder cover 42, 47 fulcrum shaft engagement holes 50, 51 fulcrum shafts 60, 61, 62, 63 magnet rollers 70, 71, 76 magnets

Claims (2)

  A blade having an engagement hole, a blade holder having an engagement hole, a blade slider for holding the blade in an arbitrary position in the blade holder, and a holder cover for storing the blade holder; A fulcrum shaft for pivotally attaching the blade holder to the holder cover, at least a pair of front and rear magnet rollers for urging the member to be cut, and attracting the blade holder by a magnetic force in the blade edge direction. Cutter knife to do.   At least one magnet slidably contacting the holder cover is provided between the blade holder and the member to be cut, and the cutting force is adjusted by adjusting the force that attracts the blade holder toward the blade edge. The cutter knife according to claim 1.

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