JPS6332695Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention allows the blade and handle of a kitchen knife to be detached and removed, allowing the blade to be replaced with a new one when the cutting edge has deteriorated. This makes it possible to provide knives with good sharpness without the need for consumers to constantly sharpen them.

(Prior art) In the past, the blade and handle of conventional kitchen knives were fixed with rivets or glued together, making it impossible to separate the blade and handle. It has appeared.

For example, Utility Model No. 53-9478.

This has a structure in which a window hole is provided in the core fixing plate connected to the base end of the main blade, and the cover is rotated and clamped in front of the handle.

This idea differs from conventional knives because it has a fixing device between the blade and the handle, and the cutting edge is located far in front of the handle, making it difficult to cut. It is something.

In addition, the one with a replaceable blade structure in Utility Application No. 51-41099,
Although the structure is very similar to the present invention, if the screw at the rear end loosens, the clamped and fixed state due to tightening will be released, and there is a risk that the blade will fall off from the forehead.

(Problem that the invention aims to solve) The edge of a knife usually loses its sharpness after one month of use and must be resharpened. It is widely known that knives damage nutritional sources, but as few households these days own sharpening stones, and sharpening techniques are less developed, people tend to keep dull knives for a long time. It was in the current state of use.

(Means for solving the problem) In order to solve the above-mentioned problems, the present invention has a structure in which the blade and handle are detachable and can be replaced with a new blade with a sharp cutting edge. will be explained with drawings.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention.

A rectangular window hole 3 is bored in the core fixing plate 2 connected to the base end of the main body 1 of the blade, and a split groove 4 for holding the core fixing plate 2 is provided at the front center position, and a tapered part 5 is formed on the outer periphery. One of the clamping pieces 6 is provided with a projecting protrusion 8 that fits into the rectangular window hole 3, and the other clamping piece 7 has a base end 9 that is a hinge and can be rotated. A screw rod portion 11 is provided protruding from the rear end of the shaft rod 10 having a forehead shaped like this, a tapered portion is provided inside the front inner surface of the cylinder body 12, and the core fixing plate 2 is attached to the clamping piece 6. The shaft rod 10, which has been fitted into the convex portion 8 and clamped by closing the clamping piece 7, is inserted into the cylinder 12 and penetrated, and the screw 13 is screwed into the threaded rod portion 11, and by tightening, the front head of the shaft rod is held at the front part of the cylinder. This is a replaceable blade type kitchen knife in which a core fixing plate 2 is clamped and fixed by tightening.

(Function) Since the present invention has the above-mentioned configuration, if the cutting edge of the blade main body 1 becomes dull, the shaft rod can be removed by loosening the screw 13 at the rear of the handle. 10
pull it out to the front, open the clamping piece 7, and remove the core fixing plate 2.
from the convex part 8 of the clamping piece 6, fit the rectangular window hole 3 of the core fixing plate 2 of the spare blade main body 1 with a new sharp edge into the convex part 8 of the clamping piece 6, and then By closing and inserting the shaft rod 10 into the cylindrical body 12 and passing it through, the screw 13 is screwed into the threaded rod part 11 and tightened, thereby forming the tapered part 5 of the front part of the shaft rod at the front part of the cylinder body. As a result of the pressing relationship, the core fixing plate 2 sandwiched in the center is clamped and fixed.

(Example) The main body 1 of the blade of a cutlery has an external shape suitable for various uses, such as a Nakiri type, a Gyuto type, a Santoku type, etc., but the shape of the core fixing plate 2 of these types is the same. By doing so, it is easy to change the main blade according to the object to be cut.

Even if the fitting shape between the rectangular window hole 3 of the core fixing plate 2 and the convex portion 8 protruding from the clamping piece 6 is a well-known circular shape, oval shape, etc., the effect will not change.

A screw 1 that is threadedly engaged with a screw rod portion 11 at the rear end of the shaft rod 10
Due to the need for strength due to the tightening described in step 3, insert molding of the threaded rod portion 11 and the screw 13 made of metal makes it possible to withstand stronger tightening.

(Effect of idea) The present invention has the following effects.

(b) If the cutting edge of the main body 1 of the blade becomes dull, the cutting edge of the main body 1 of the blade is prepared as a spare, so that the cutting edge of the main body 1 can be sharpened without the need for difficult resharpening. By replacing the main body 1, a sharp knife can always be used.

(b) Replacement work can be easily performed by an untrained person since the screw 13 is rotated and clamped and fixed to the clamping pieces 6 and 7.

(C) The convex part of the clamping piece 6 and the clamping between the clamping piece 7 prevent the blade main body 1 from falling off forward, but in consideration of the possibility that the consumer may replace it, it is easy to replace it. It will not fall off.

(d) As in the past, several types of blades were required depending on the object to be cut, but with the present invention, by providing several types of blades in the required external shape,
By storing them in a case, taking out the necessary blade body 1 and clamping and fixing them, it is no longer necessary to prepare several types of blades.

(e) The use of this invention, which achieves the maximum effect with the minimum necessary amount, will reduce the number of knives in the home, thereby preventing dangerous situations.

(f) To reduce the risk of not being able to dispose of the cutlery, if a metal disposal case is provided for the blade main body 1 and the knife is stored in the case and disposed of as waste, it will be safe and useful for waste separation. Become.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention. FIG. 2 is a sectional view of the entire structure. 1: Blade main body, 2: Core fixing plate, 3: Rectangular window hole, 4: Split groove, 5: Tapered part, 6, 7: Clamping piece, 8: Convex part, 9: Base end part, 10: Shaft Rod, 11:
Threaded rod part, 12: cylinder body, 13: screw.

Claims (1)

[Scope of utility model registration request] A rectangular window hole 3 is bored in the core fixing plate 2 connected to the base end of the main body 1 of the blade, and a split groove 4 for holding the core fixing plate 2 is provided at the front center position, and a tapered part 5 is formed on the outer periphery. One of the clamping pieces 6 has a protrusion 8 that fits into the rectangular window hole 3, and the other clamping piece 7 has a base end 9 that is a hinge and can be rotated. A screw rod part 11 is provided protruding from the rear end of the shaft rod 10 having a forehead shaped like this. The shaft rod 10, which has been fitted into the convex portion 8 and clamped by closing the clamping piece 7, is inserted into the cylinder 12 and penetrated, and the screw 13 is screwed into the threaded rod portion 11, and by tightening, the front head of the shaft rod is held at the front of the cylinder. This is a replaceable blade type knife that is tightened and clamped with a core fixing plate 2.