JPS5920931Y2 - Electric knife sharpener - Google Patents

Description

[Detailed description of the invention] This invention is an adjustment that allows adjustment of the contact angle and degree of pressure of blades such as kitchen knives, paring knives, and office knives that are sharpened at an angle substantially parallel to the upper plane of the whetstone rotated by a motor. The present invention relates to a knife sharpener that can sharpen a knife safely and without failure by fully utilizing the active motion of a person that is generated by maintaining the force of pressing the adjusting tool placed on the tool with the knife.

Normally, sharpening a dull knife with a whetstone means giving it a sharp edge, and this knife sharpening work requires skill.

Although many requirements are required for the skill of sharpening the blade, the best method is to use a whetstone to polish the blade to the extent that it does not become excessively sharp.

It should be noted that anyone can easily become skilled at sharpening knives if they only do one action, but it is easier if they can do two or three actions at the same time sensually and intuitively. Everyone has experienced this in every work process.

Therefore, even if the blade sharpener is active, it is difficult for the user to become proficient if the person using the blade sharpener requires many simultaneous operations. It will disappear.

The present invention takes the above-mentioned problems into account, and provides a knife sharpener that allows the user to easily and easily sharpen the blade by consciously performing simultaneous operations.
The purpose is also to improve the safety of polishing work.

Conventional electric knife sharpeners use a whetstone rotating body that is bounced up and down by a spring housed in a holder that has a coupling member with a built-in spring and a whetstone attached to the upper end of the motor's rotating shaft. A knife sharpener with the same structure is proposed in Japanese Utility Model Application No. 53-113489.

However, when this type of blade comes into contact with the whetstone, 1. the blade contacts a fixed blade guide plate, and 2. the blade is pressed against a certain slope formed on the whetstone by applying a certain force. However, depending on the strength of this movement, the blade is sharpened deeply or thinly,
3. The blade to be sharpened is pulled forward in the longitudinal direction or pushed backwards, so at this time a pressing force is applied to prevent the blade from falling off the guide plate, and at the same time the blade comes into contact with the inclined surface of the whetstone. You must simultaneously perform the above 2 action of pressing the blade against the grindstone while applying force so that the grinding wheel remains constant.

Since these three operations are performed simultaneously intuitively, the blade will be accurately sharpened according to their accuracy.

It is quite difficult to hold the plate of a sharpened knife and press the blade to be sharpened against the inclined surface of a rapidly rotating whetstone in a consistent manner, and it often fails to sharpen the blade uniformly.

Therefore, an important cause of the failure was that the blade, which was being sharpened by coming into contact with the rotating whetstone, was pressed against the inclined surface of the whetstone.

The present invention is characterized in that the blade that is sharpened by contacting the rotating whetstone is brought into contact with the upper flat surface of the whetstone at an angle parallel to it.

In the present invention, as shown in the embodiment shown in FIG. 1, a rotary whetstone 1 is mounted on a rotating shaft 4 of a motor using a holder 2, and a blade to be sharpened is mounted on the upper part of an outer cylinder 5 housing a motor 3. It is characterized in that a blade adjuster 6 is elastically installed so as to come into contact with the upper plane part 1a of the rotating grindstone 1 at a substantially parallel angle, and the main components thereof will be explained in detail below.

The blade adjuster 6 according to the present invention is constructed as shown in FIG. 2, and has a cylindrical outer periphery with a tip placed upside down so that the grindstone 1 of the grindstone rotating body is surrounded by a space 7. A blade adjuster 6 having a wall 8 and a guide hole 9 having a certain angle and depth into which a blade to be sharpened is inserted into the outer circumferential wall is pushed downwards from the whetstone rotating body. It's Nishide.

The upper cover 10 screwed onto the upper outer edge 5a of the outer cylinder 5 of the motor and the blade adjuster 6 described above are connected as follows.

That is, as shown in FIG. 2, the cylindrical peripheral wall 11 of the upper cover 10 has a constant thickness of the peripheral wall 8 of the blade adjuster 6 located above the cylindrical peripheral wall 11, and the spring 12 is inserted within that width. The cylinder of the blade adjuster 6 located on the upper side has bent ends 8a and lla that are interposed therebetween and support each spring 12 so as to slide up and down, and has the upper bent end 8a. It is formed by extending the peripheral wall 8 of the shape thinly.

Alternatively, a metal cylindrical body 13 separate from the cylindrical peripheral wall 8 and having an extended outer circumference of the peripheral wall 8 and a bent end 13
It is also possible to form a part and bond or secure it with a J-coat.

The upper cover 10, which is slid inside the metal cylindrical body 13, has its cylindrical peripheral wall 11 bent inward to form a bent end 11a, which extends upward.

Further, a guide protrusion 14 and a guide recess 15 are provided at the portions where the cylindrical peripheral walls 11 and 13 slide against each other for sliding guidance.

The guide protrusion 14 and the guide recess 15 may be installed on either of the sliding side peripheral walls 11, 13, and the number thereof is not limited.

Incidentally, the guide opening 9 in the present invention serves as an external upper cover in appearance.

As shown in FIG. 3, the whetstone rotating body used to carry out the present invention has a fixing part 2a for the whetstone 1 on the upper side and a cylindrical part 17 in which the spring 16 is housed on the lower side. By connecting the rotating shaft 4 through the cylindrical portion 17, the spring 16, and the center of the whetstone 1 stored in the whetstone holder 2, the spring 16 can smoothly expand and contract between the spring 16 and the whetstone 1. washer 1 to
8, the cylindrical part 17 corresponding to the lower side of the spring 16
A cylindrical fixing body 19 is interposed at the lower end to fix the spring 16 and the rotating shaft 4, so that the cylindrical part 17 housing the spring 16 can move up and down.
The fixed body 19 is passed through the vertical operating portion 20 provided in the vertical operating portion 20 and fixed to the rotating shaft 4 of the motor with a screw 21.

Reference numeral 21a in the figure indicates a grindstone fixing screw.

As shown in Figure 3, the assembled state of this whetstone rotating body is such that the whetstone 1 is fixed on the upper side, the fixed body 19 that supports the spring 16 housed on the lower side, and its washer 18 are supported, and the cylindrical part 17 is supported. By passing a screw 21 through the vertical elongated hole 20 and fixing it to the motor shaft 4, the grindstone 1 can move up and down while rotating.

In order to ensure the operation and effect of the present invention by explaining the usage state of the present invention using Figures 4 and 5, A,5, we will first explain the polishing operation of a conventional knife sharpener using Figure 6, A, 5. explain.

As shown in Figure 6, A9, the conventional knife sharpener is
The blade 22 is pressed so that the slope 22a of the blade 22 comes into contact with the slope 1b formed on the upper peripheral edge of the rotating grindstone 1 (for example, a slope formed similarly to the slope 22a of the normal blade 22). force P3 to press against the inclined surface 1b of the whetstone
This is because the three actions of adding the force and moving the blade 22 forward P1 or backward P2 are simultaneously performed intuitively.
Depending on the person's intuitive simultaneous movements, it is difficult to perform these movements and it is difficult to become skilled at them.

Since the present invention is configured and assembled as described in the embodiment, turn on the manual switch (not shown) and press both edges 9a, 9 of the guide opening 9 of the blade adjuster 6.
When the blade 22 contacts and presses the blade 22, the blade 22 is brought into contact with the upper flat part 1a of the rotating grindstone 1 so that it is approximately parallel to the upper flat part 1a (for example, as shown in FIG. Edge 9
b) or so that the parallel surface 22b side of the blade 22 is parallel to the flat part 1a of the whetstone (for example, as shown in FIG. b) The blade 22 is sharpened according to the degree of contact and pressure.

In such an operation, the spring 12 of the blade adjuster 6
Due to the effect of the elastic force, the risk of the cutter being bounced is reduced by gradually bringing the cutter into contact with the whetstone, and during polishing, the cutter can be stably pressed and supported on the upper surface of the rotating whetstone, thereby reducing contact with the whetstone. It is possible to perform uniform polishing within the range.

In addition, the blade 22 contacts both edges 9a and 9b of the guide port 9 and maintains a constant polishing posture, while easily adjusting and maintaining the vertical pressing force P in the direction of the arrow P1 or P1.
Since the blade is sharpened by performing only the two operations of moving it to the second side at the same time, the polishing work becomes easy and uniform polishing can be obtained over the entire blade.

At this time, if you intuitively feel that the pressing force P is excessive, the blade 22 will separate from the rotating whetstone 1 due to the elastic force of the spring 12 of the instantaneous blade adjuster 6, which will loosen the force P, so the pressing force will be instantly adjusted. It is possible to provide a knife sharpener which is safe and accurate, and which can be adjusted so that the knife can be loosened over time, and which prevents the knife from becoming unusable due to excessive sharpening.

Moreover, such an operation becomes easier when the blade 22 is fixed horizontally and the knife sharpener of the present invention is moved in the longitudinal direction of the blade.

In addition, in the knife sharpener of the present invention, the force P with which the rotating whetstone 1 presses the blade 22 due to the buffering effect of the spring 16 built in the lower part of the holder 2 is somewhat excessive or irregular. In this case, the degree of contact is adjusted so that even if there is a difference in the degree of sharpening of the blade 22 on the grindstone 1, the blade 22 will not be sharpened excessively, so that the above-mentioned polishing operation can be repeated without failure and will be satisfied. You can sharpen the blade.

The present invention is a blade adjustment that more reliably adjusts the active movement of the person who holds and presses the blade 22 to be sharpened on the upper flat part 1a of the rotating whetstone 1 at a substantially parallel angle or at an inclination angle of about 10 degrees. A convenient knife that allows anyone to sharpen the blade safely and without failure using the spring 12 of the tool 6 and the spring 16 of the whetstone 1. Provide a polisher.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the grinder according to the present invention, Fig. 2 is an exploded perspective view of the grinder, Fig. 3A is an exploded perspective view of the grinding wheel rotating body used in the invention, and Fig. 3 The assembled sectional view of Figure 3 A,
Figures 4 and 5 show how the blade and grindstone are used. Figure 4A is a side sectional view, Figure 4 is a perspective view, Figure 5A is a side sectional view, and Figure 5 is a perspective view. Figures 6 and 6 show the state of use of a conventional knife sharpener, with Figure 6A being a side sectional view and Figure 6 being a perspective view. DESCRIPTION OF SYMBOLS 1... Rotating grindstone, 1a... Upper plane part, 2... Cutting holder, 2a... Fixing part, 3... Motor , 4... Rotating shaft of motor, 5... Outer cylinder, 5a... Upper outer edge, 6... Blade adjuster, 7... ...Space section, 8
...Peripheral wall, 8a...Bent end, 9...
...Direction gate, 9a. 9b, 9C...edge, 10...upper cover, 11...cylindrical peripheral wall, 11a...
...Bent end, 12...Spring, 13...
...Metal cylindrical body, 14...Guiding protrusion, 15
...Guiding recessed part, 16 ... Spring, 18 ... Washer, 19 ... Fixed body, 20 ... Vertical operation part, 21 ...Screw, 22...Knife.

Claims (1)

[Scope of utility model registration request] A blade adjuster 6 is elastically installed on the upper peripheral edge 5a of the outer box 5 of the motor 3, and surrounds a grindstone rotating body in which a grindstone 1 whose upper side has a horizontal surface 1a is attached to a rotating shaft 4 of the motor 3 by a grindstone holder 2. In this case, the outer circumferential wall 8 of the blade adjuster 6 is provided with a blade guide opening 9 having a certain angle and depth into which the cutter 22 is inserted into the cylindrical outer circumferential wall 8 in the form of an upside-down tip. A spring 12 is interposed between a bent end portion 13 a obtained by bending the upper end of the metal cylindrical body 13 and a new bent end portion 11 a obtained by bending the cylindrical peripheral wall 11 of the upper cover 10 inward and extending upward. This knife sharpener is formed with a guide protrusion 14 and a guide recess 15 that guide the user so that the movement is vertical.