Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B9/00—Blades for hand knives
  • B26B9/02—Blades for hand knives characterised by the shape of the cutting edge, e.g. wavy

Definitions

• the present invention relates to an improvement in the shape of a blade edge of a blade in which a plurality of concave portions and a plurality of convex portions are alternately formed on a blade edge portion extending from a blade.
• each recess has a cutting edge that is orthogonal to a line connecting the tops of the projections and that is symmetrical with respect to a line passing through the bottom of the recess.
• Each projection has a cutting edge that is orthogonal to a line connecting the tops of the projections and that is symmetrical with respect to a line passing through the top of each projection.
• the symmetrical cutting edge is continuously formed in each concave portion and each convex portion so as to form a wavy shape, the cutting function given to the workpiece at the time of reciprocating cutting operation is provided. It does not change. Therefore, one cutting characteristic cannot be humiliated.
• the optimum shape of the blade edge is different. If not, the blade edge may slip on the slippery surface layer, or it may catch on the slippery surface layer, resulting in poor sharpness.
• a knife according to the present invention for example, a cooking knife such as a bread knife is configured as follows.
• a plurality of concave portions and a plurality of convex portions are formed on a blade edge extending from the blade. They are formed mutually and continuously, and the blade edges thereof are extended on both front and rear sides with the top of each of the projections interposed therebetween, and the front inclined cutting edge and the rear side which are continuous at the top of each of the projections. And a convex cutting edge including the inclined cutting edge.
• the shape of the front inclined edge and the shape of the rear inclined edge are different from each other.
• the “different forms” are, for example, as shown in FIG. 2, orthogonal to the line connecting the tops of the respective protrusions and not symmetrical with respect to a specific line passing through the tops.
• the cutting function given to the workpiece during the reciprocating cutting operation changes due to the convex cutting edge having a front inclined cutting edge and a rear inclined cutting edge that are different in form, and a plurality of cutting edges are provided for the cutting edge. It can have cutting characteristics. By appropriately using the cutting characteristics, the sharpness of the object to be cut can be improved.
• a plurality of concave portions and a plurality of convex portions are alternately and continuously formed on a blade edge portion extending to a blade, and the respective convex portions are formed on the blade edge portion.
• a convex cutting edge is formed extending across the front and rear sides of the top of the portion, and includes a front inclined cutting edge and a rear inclined cutting edge continuous at the top of each convex portion.
• a plurality of regions having different shapes of the protruding cutting edges are juxtaposed along a line connecting the tops of the protruding portions.
• the cutting function given to the object to be cut at the time of the cutting operation is changed by the plurality of regions having different forms of the convex cutting edge, and the cutting edge has a plurality of cutting characteristics.
• a plurality of concave portions and a plurality of convex portions are formed alternately and continuously on a blade edge extending from the blade, and the blade edge includes a top portion of each convex portion.
• a convex cutting edge including a front inclined cutting edge and a rear inclined cutting edge which are extended at both front and rear sides of the convex portion and continuous at the top of each convex portion is formed.
• the blade edge includes a first region in which the inclination angle of the rear inclined cutting edge with respect to a line connecting the tops of the convex portions is set to be larger than the inclination angle of the front inclined cutting edge with respect to this line.
• the inclination angle of the front inclined edge with respect to the line connecting the tops of the convex portions is And the second region set to be larger than the inclination angle of the second region is arranged along this line.
• the surface layer of the object to be cut is cut by a front-sided tip with a large inclination angle in the cut-off area.
• the surface layer of the object to be cut is cut by the rear inclined cutting edge having a large inclination angle in the cutting area.
• the surface layer of the object to be cut is cut by the front inclined cutting edge having a small inclination angle in the cut-off area, and the cut-off is also performed.
• the surface layer of the object to be cut is cut by the rear inclined cutting edge having a small inclination angle in the press cutting area. Therefore, in the cutting tool of this aspect, the sharpness of the object to be cut can be improved by properly using each of the above-described operations and regions according to the conditions relating to the object to be cut.
• FIG. 1 (a) is a front view showing a bread knife according to the first embodiment of the present invention. • FIG. 1 (b) is a rear view of the knife,
• Figure 1 (c) is a cross-sectional view of the knife blade.
• Fig. 2 (a) is a partially enlarged front view showing the blade edge of the knife of Fig. 1 (a),
• FIG. 2 (b) is a partially enlarged front view showing a blade edge portion of a bread knife according to another example of the first embodiment
• FIGS. 3 (a) to 3 (d) are operation explanatory views showing a cutting operation by the bread knife according to the first embodiment.
• Fig. 4 (a) is a front view showing a bread knife according to the second embodiment
• FIG. 4B is a front view showing a bread knife according to the third embodiment.
• a bread knife as a cutting tool will be described with reference to FIGS. 1 (a) to 1 (c), 2 (a) and FIG.
• a blade 2 attached to a handle 1 has a wavy blade edge 3 extending on its ventral side.
• a plurality of concave portions 4 and a plurality of convex portions 5 are continuously and alternately formed on the blade edge portion 3.
• Each convex portion 5 has a convex cutting edge 6 formed thereon.
• Each convex cutting edge 6 extends on both front and rear sides of the top 5a of each convex portion 5 so that the front inclined cutting edge 7 and the rear Includes an inclined edge 8.
• Each recess 4 has a concave cutting edge 9 formed therein.
• Each of the concave cutting edges 9 is extended on both front and rear sides of the valley bottom 4 a of each concave portion 4, and the front inclined cutting edge 7 and the rear inclined cutting edge 8 continuous with each other at the valley bottom 4 a of the concave portion 4.
• the edge 3 has a region where the shapes of the convex cutting edges 6 and the concave cutting edges 9 are different from each other. They are juxtaposed along the edge line L connecting the tops 5a of the parts 5. These areas include a cut-off area A that is a first area, a push-off area B that is a second area, and an intermediate area C that is a third area between those areas A and B.
• the cut-off area A is disposed on the proximal end side of the blade 2, and the push-off area B is disposed on the distal end side of the blade 2.
• the intermediate area C includes one convex portion 5 at a boundary between the cut-off area A and the push-off area B.
• the intervals WA5 and WB5 along the cutting edge and di L are equal to each other between the tops 5a of the two convex portions 5 adjacent to each other.
• the distances WA4 and WB4 along the edge line L between the valley bottoms 4a of the two concave portions 4 adjacent to each other are equal to each other, and the distances WA5 and It is equal to WB5.
• the interval WC4 along the edge line L is substantially equal to the intervals WA5, W5 and the intervals 4, WB4.
• the intervals WAC5 and WBC5 are larger than the intervals WA5 and WB5 and the intervals WA4 and WB4.
• a dividing line 10a having the same form as that of each of the convex cutting edges 6 and each of the concave cutting edges 9 is formed in parallel with the dividing line of each of the convex cutting edges 6 and each of the concave cutting edges 9. Have been.
• the form of the front inclined edge 7 and the form of the rear inclined edge 8 are different from each other as described below.
• the inclination angle ⁇ 8 of the rear inclined cutting edge 8 with respect to the cutting edge line L is set to be larger than the inclination angle ⁇ 7 ( ⁇ 7 ⁇ 8) of the front inclined cutting edge 7 with respect to the cutting edge line L.
• the inclination angle ⁇ 8 is defined by the inclination line M 8 (a straight line substantially along the rear inclined cutting edge 8) connecting the top 5a of the convex portion 5 and the bottom 4a of the concave portion 4 with respect to the edge line L.
• This inclination angle ⁇ 7 is formed with respect to the inclination line M 7 (a straight line substantially along the front inclined cutting edge 7) connecting the top 5 a of the projection 5 and the bottom 4 a of the depression 4. Angle.
• the inclination angle ⁇ 7 of the front inclined cutting edge 7 with respect to the cutting edge line L is set to be larger than the inclination angle ⁇ 8 of the rear inclined cutting edge 8 with respect to the cutting edge line L ( ⁇ 8 ⁇ 7).
• the radii of curvature R 8, R 7 (not shown) having a center of curvature outside the concave portion 4 and the convex portion 5 are provided. ) Includes 8a and 7a.
• each of the convex cutting edges 6 has a front inclined cutting edge 7 and a rear inclined cutting edge 8 intersecting each other at a tip 11 at the top 5a of the convex portion 5.
• the concave cutting edge 9 has an arc cutting edge having a radius of curvature R 12 (not shown) having a center of curvature outside the concave portion 4 and the convex portion 5 at the bottom 4 a of the concave portion 4.
• the front-side inclined cutting edge 7 and the rear-side inclined cutting edge 8 are continuous with each other at the arc-shaped cutting edge 12.
• the convex cutting edge 6 has an arc cutting edge 13 having a radius of curvature R 1 • 3 (not shown) having a center of curvature inside the concave portion 4 and the convex portion 5 at the top 5 a of the convex portion 5.
• the front-side inclined cutting edge 7 and the rear-side inclined cutting edge 8 are continuous with each other at the arc-shaped cutting edge 13.
• the concave cutting edge 9 has a curvature center having a center of curvature outside the concave portion 4 and the convex portion 5 at the bottom 4a of the concave portion 4. It has an arc edge 14 having a radius R 14 (not shown), at which the front inclined edge 7 and the rear inclined edge 8 are continuous with each other.
• the object to be cut P is French bread, as shown in FIG. 3 (a), the force of pressing the cutting area B of the blade edge 3 of the blade 2 to the surface layer of the object to be cut P, or It is preferable that the cutting area A of the blade edge 3 of the blade 2 be applied to the surface layer of the workpiece P as shown in FIG.
• the front-side inclined cutting edge 7 having a large inclination angle ⁇ 7 in the cut-off area B first cuts the surface layer of the workpiece P.
• the rear inclined cutting edge 8 having a large inclination angle ⁇ 8 in the cutting area A first cuts the surface layer of the workpiece P.
• the front inclined cutting edge 7 having a small inclination angle ⁇ 7 is used in the cutting-off area A, and when performing the cutting-off, the inclination angle is set in the pushing-off area B. In some cases it may be preferable to use a small rear inclined edge 8 of ⁇ 8. Thereafter, the object P can be cut in each operation and the areas A and B as appropriate.
• the front inclined cutting edge 7 having a small inclination angle ⁇ 7 moves toward the cooking plate Q in the cutting area A, and In this case, as shown in FIG. 3 (d), it is preferable that the rear inclined cutting edge 8 having a small inclination angle ⁇ 8 moves toward the cooking plate Q in the press cutting region B.
• the front inclined edge 7 and the rear inclined edge 8 of the cut-off area A, and the front inclined edge 7 and the rear inclined edge of the push-cut area B includes arcuate cutting edges 7a and 8a having curvature radii R7 and R8 having a center of curvature outside the concave portion 4 and the convex portion 5, respectively.
• the entire blade edge 3 of the blade 2 has the same form as the front inclined edge 7 and the rear inclined edge 8 of the push-cut area B.
• the entire blade edge 3 of the blade 2 has the same form as the front inclined edge 7 and the rear inclined edge 8 in the cutting and cutting area A.
• the present invention may be applied to a cooking knife other than a bread knife or a knife other than a cooking knife.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Food-Manufacturing Devices (AREA)
• Knives (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=27678175

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (10)

Citations (2)

Family Cites Families (11)

• 2002
  • 2002-02-15 JP JP2002038439A patent/JP3857596B2/ja not_active Expired - Fee Related
• 2003
  • 2003-01-23 US US10/502,645 patent/US20050115084A1/en not_active Abandoned
  • 2003-01-23 EP EP03701844A patent/EP1479488B1/en not_active Expired - Lifetime
  • 2003-01-23 WO PCT/JP2003/000582 patent/WO2003068465A1/ja not_active Ceased
  • 2003-01-23 DE DE60320951T patent/DE60320951D1/de not_active Expired - Lifetime

Patent Citations (2)

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