JPS618266A - Grinder for edge tool - Google Patents

Abstract

0 A method and apparatus for sharpening knives, blades, and the like utilizing a rotating displaceable abrasive disk where the abrading force on the knife cutting edge facet in parallel contact with the surface of the disk perpendicular to its axis of rotation is controlled by a biasing means such as a spring or equivalent, the position of the cutting edge facet on the disk is established by two appropriate stops contiguous to the disk and the angle between the principal plane of the disk and the face of the knife is controlled precisely so as to accommodate knives of different thickness and shape. Magnetic means to control the angle are claimed. Methods and apparatus include sequential steps that utilize one or more orbiting abrasive surfaces together with an abrasive disk sharpener where in each step there is a guide, preferably magnetic, to control the sharpening angle and where the angle is progressively greater in those sharpening steps where the orbiting abrasive elements are employed. Also claimed are means in a disk sharpener to prevent accidental contact of the face of the blade with the moving abrasive surface.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in methods and apparatus for rapidly sharpening the blades of knives and other cutting tools to give them superior quality. In other words, cutlery refers to the blades of chisels, planers, scissors, razors, etc., and similar precision cutting blades or cutlery.

[Prior art and problems]

There are many types of known sharpening devices, and most of them have complicated structures and cannot sharpen knives quickly and easily. To date, no sharpening rIP equipment has been disclosed that allows an unskilled person to quickly sharpen a knife to razor sharpness.

RT quickly! In order to sharpen blades, a device is needed that can rapidly sharpen blades, for example blades made of high carbon steel or stainless steel. The rIII polishing speed is affected by the inherent hardness and grain size of the abrasive used for polishing, the magnitude of the force pushing the blade of the knife, and the speed of abrasive grain movement in the direction across the blade. Among commonly used abrasives, diamond has the highest hardness, with a hardness of 10 on the Moh scale. In contrast, the hardness of blades made from ordinary steel alloys is about 5.5. Abrasive materials other than diamond, such as alumina, dense alpha alumina, carborundum, and natural stones, can be used to sharpen knives because they are harder than most steel knives.

Using abrasives made of these materials, cutlery can be made to a thickness of 0.
00254 (approx. 1/10.000 inch), but in order to do this, the abrasive used must be made into fine particles and the polishing speed must be kept below the limit value, that is, one thin, sharp blade must be polished while polishing. It must be protected from overheating.

The polishing speed of a polishing device capable of such polishing is slower than that of a polishing device with a large abrasive particle size and a high polishing speed.

It is fate that in order to sharpen the blade of a knife extremely sharply, it is impossible to do so without slowing down the speed. Not suitable for polishing time or extremely dull blades. Therefore, in order to shorten the time required to sharpen a very dull blade as thinly and sharply as the material composition and crystal structure allow, the time-consuming grinding process is usually cut from the final grinding process to a m-thickness. All of the existing polishing devices that can perform this grinding process with a single machine can sharpen the blade by 0.00254s+m (1/10
．． 000 inches), it cannot be sharpened satisfactorily and quickly.

Most of the prior art relates to disk-type rapid polishing devices, such as those described in U.S. Pat. No. 3,680,264, but such devices do not provide satisfactory polishing. The reason for this is that the disc is extremely difficult to control, and the things that are obviously difficult to control are the precise positioning of the blade, the angle between the blade and the disk surface, and the overheating of the blade during polishing. be. The biggest drawback is that the disc "grabs" the knife, which occurs when the blade of the knife rests on the flat side of the disc. Also, (l!I 17) The most significant disadvantage is that the intuitive grinding creates undesirable serrations or grooves along the blade. The above-mentioned "grabbing" phenomenon occurs when the angle between the surface of the cutter and the surface of the disk is unstable. is inappropriate,
or when the force exerted by the disc or handle on the blade of the knife is not kept constant during sharpening.

The main reasons for poor sharpening with disc-type polishing equipment are:
This is because there is little control over the angle of the blade of the cutter relative to the rotating disk; such an example is shown in U.S. Pat. No. 2,499.
No. 6,139, which states that in practice, the guide device of the blade is made to wobble, and the polishing angle is determined by the skill of the person doing the polishing or in accordance with the width and thickness of the blade. . Without sufficient control to hold the blade parallel to the surface of the disc, or at an angle to the main surface of the disc-type sharpening device, the blade can be sharpened optimally and the serrations Even if you wish to get rid of that part, it is impossible.

In order to minimize groove marks on the blade surface and catching on the whetstone surface due to poor control as described above when sharpening a knife with a disk,
Conventionally, what has been widely done is to apply the blade of a cutter only to the corner edge of the disk, as described in U.S. Pat. Contact! ! The method was to be aware of this and avoid it. In the present invention, a spring is applied to the disk 1! The blade is pressed against a strong holder by a plate spring, and the guide device of the blade polishing device according to the present invention is located on one side of the disk, and Limits the movement of the blade towards the disk. Even if such measures are weak, if the blade surface is not brought into surface contact with a surface perpendicular to the axis of rotation of the disk, the blade will remain in contact with the whetstone during sharpening. There is a rough contact or limited line contact with the abrasive surface, which makes the blade extremely susceptible to scratches.If this whetstone passes over the edge of the knife in one direction, the blade curls, and this curl exceeds the tolerance limit for the blade. This causes large serrations or areas similar to large burrs to occur.

This J: problem-solving direction and an improvement with a "ξ-through surface" are described in U.S. Pat. This was an attempt to extend the line of contact between the two provinces by bringing them into contact. It is well known that such a blade til+friction device produces a blade with a lot of scratches, and even if it is well made, the blade has poor cutting ability and has many chipped teeth. In all such blades 41 II 'Ei ftfj, the grindstone is passed approximately in one direction relative to the blade, which prevents the blade from having a tooth-like area or a large -1 dent.

A composite abrasive head is described in U.S. Pat. The grindstone moves towards the other pair of grindstones, and its linear reciprocating motion simultaneously sharpens the blade surfaces on both sides of the knife. The knife is held in three sets of jaws of a positioning device which laterally floats between the pairs of grinding wheels to slowly insert the blade into the positioning device. This insertion is done by inserting a set of three grooves 4 on the side of the blade.
This is done by engaging one or more sets of blocks. This polishing device has the disadvantages of being complex and requiring linear motion. The drawback is that the blade leaves a serrated defect, which causes the object to tear when cut with this blade, and the abrasion resistance of the cutting edge is poor. Due to the floating structure of this positioning device and the fatal disadvantage that the two blade surfaces are stuck in the vortex f1 block, this structure cannot be applied to any other polishing device. Both sides or both blade surfaces of the blade are used to slowly insert the blade into the abrasive device, and said transverse float *J
+7 For two reasons, this prior art positioning device cannot be applied where the blade needs to be positioned with high precision. Inserting the blade Pi! The degree, and therefore its position, depends on the width of the blade, the width and angle 1α of the blade face, the degree of manual pressure applied during sharpening, and the extent to which the blade moves.

U.S. Pat. No. 2,751,721 describes a polishing device that uses a drum-type grindstone. In this knife polishing device, the blade surface is polished by a round portion of the drum surface, and this drum surface rotates within a plane perpendicular to the rotational axis of the drum.

The polishing force applied to the blade surface is determined only by the force applied to the blade by the hand, which causes the polishing speed to fluctuate constantly, resulting in poor blade formation and serration defects on the blade.

These problems are common to many prior art techniques.

The reason why the position and stability of the blade held in the holding device and the controllability of the angle of the blade surface relative to the grinding wheel surface are poor is that these characteristics are controlled by the pressing force applied by the sharpener. ,
Further, although there are a wide variety of knives used in general society, the purpose is to sharpen them so that they have a common blade surface shape.

U.S. Pat. No. 2,645,063 describes a knife polishing device having a drum surface guide mechanism.

This guide mechanism has a stop l-device, which uses a bearing to position the cutter using the cutting edge of the cutter. Such a stop device is impractical. The reason for this is that the blade is dulled as it traverses directly at right angles to one face of the guide. This U.S. patent and U.S. Patent Nos. 2 and 7
No. 51,721 describes a knife sharpening device using a magnet, but the magnetic field of the magnet does not support or guide the knife.

[Purpose of explanation]

The object of the present invention is to eliminate the above-mentioned drawbacks and provide a method and apparatus for quickly turning a dull knife into a thin, sharp knife.

[Key points and effects of the invention]

The foregoing objects are achieved by a method and apparatus for sharpening knives using an improved disk-type knife sharpening device and precisely controlling each step of the sharpening process.

Also, is the disk-type knife polishing device an orbital-type knife? J.I.
Wear and tear and tear 1! By doing so, it was possible to create a new blade guide device, which has been incorporated into the present application.

By using the disk-type knife sharpening device, an unskilled person can make the knife a well-shaped and reasonably sharp blade, and the entire knife is free from serration defects, overheating, or Jt'l.
Harm! It can be sharpened to a sharp blade without damaging it. In addition to using a disc-type knife polishing device, we are moving towards a new trajectory! By using a knife sharpening device, extremely thin or narrow and sharper blades can be rapidly produced. The key to most effective use of this method and apparatus is control of the polishing angle at each polishing step.

The disk-type knife polishing device described above has a highly accurate knife guide device and a highly accurate stopping mechanism that does not damage the knife, and this stopping mechanism is used as part of the knife control device. Acting on only one blade surface, this blade control device positions one moon surface in contact with and parallel to the abrasive surface of the disk-shaped grinding wheel, with this abrasive surface relative to its axis of rotation. form a right angle. The guide device is preferably of the magnetic field type, and is located adjacent to the abrasive surface of the disc-shaped grindstone to precisely and simultaneously control the angle of the surface of the blade relative to the abrasive surface, and is linked to a bias device to Controlling the blade surface and constant control of the force exerted on the blade surface of the disc-shaped grinding wheel polishing surface,
This solves the difficult problem of the conventional disk-type knife polishing device having a 1" scratch on the blade surface of the knife. The disc and the guide device are positioned with high precision together with the knife, and when the knife is removed. If removed, they will be adjacent to each other, and will cover the white contact, but will be restrained so that there is no contact.The distance between the disc and the guide device is extremely narrow, usually 1,588 m.
m (1/16 inch). The guide and stop devices are aligned so that the longitudinal direction of the blade surface is parallel to the plane of the disk, but either the disk or the guide can be moved by a biasing device in the direction of use.

Such a biasing device includes a spring, a solenoid valve, a magnetic action of the armature of the motor, a device with a driving force of its own, and these devices push the disk so as to narrow the gap with the guide device. guide but allow the disk to move within a limited range against the biasing device to ensure that the bias bias is applied during polishing.

This type of biasing is produced by a spring or other driving force in conjunction with a sophisticated stopping device, which causes the rotating disk to be forced to a constant, predetermined force during polishing. J that can rotate against the blade surface of the knife:
sea urchin, thereby adding rIIl! ! ! Precisely control the level of force. This novel disc-type sharpening device can quickly sharpen cutlery blades to 0,0254 ttrm (1
/ 1000 inches) or less. The actual thinness of the blade is highly dependent on the material of the blade, the particle size of the abrasive, and other factors.

One form of the disc includes a hub in the center, which hub protrudes sufficiently beyond the surface of the disc to prevent the blade from touching the grindstone due to improper handling during use of the disc-type knife sharpening device. d.

Another form of the disc may be an extended housing surrounding the disc, which functions similarly.

After the blade is largely polished using a disc-type knife polishing device, it is further polished using an orbital-type polishing device. This orbital type polishing device is equipped with a highly accurate blade guiding device or holding device, and quickly removes the blade by 0.00254JI11 (1/10
．． 000 inch) or less. The maximum size of the cutter is determined primarily by the properties and quality of the steel and other materials used for the cutter. The guide device used for positioning the cutter at the stage of this orbital type cutter polishing device preferably has a magnet 11, and is usually formed by aligning the surface of the cutter with the trajectory of the grindstone. Position it to maintain the angle. This angle will hereinafter be referred to as a second polishing angle, and it is preferable that this second polishing angle is similar to the first polishing angle. This first polishing angle is the angle formed between the surface of the blade I'J and the polishing surface of the disk-shaped grindstone during the polishing stage by the disk-type polishing device that precedes this polishing, and is hereinafter referred to as the first polishing angle. It's called an angle. In this way, the blade surface of the cutlery can be sharpened to an angle slightly larger than that of the entire blade surface of the blade polished by the disk-type knife polishing device.

Is it a combination of disk-type knife polishing and orbital-type knife polishing?
iIlma is new. The reason for this is that the overall polishing speed is high and an extremely sharp blade can be obtained. The disk-type polishing device disclosed by Han quickly sharpens the blade of a cutlery, and the orbital-type polishing device used next quickly sharpens the blade to a razor blade.

〔Example〕

Examples of the present invention will be described in detail below.

First, the method for sharpening a knife according to the present invention and the overall concept of @oka for implementing this method will be explained in detail.

The present invention is based on the premise that a disk-shaped grindstone is used, and the sharp surface of the blade is held parallel to the side of the grindstone, that is, to a plane perpendicular to the axis of rotation of the grindstone.

The sides of this grinding wheel are perpendicular to the axis of rotation and contain numerous surface rIIl abrasive materials. Henceforth, this song is called 18 stones main side. Such a disc-shaped grindstone has extremely superior characteristics compared to a grinding wheel, an umbrella-shaped grindstone, and a grindstone that moves in a straight line. : As explained, the abrasive material of the whetstone moves across the blade of the knife in multiple directions simultaneously: in the direction of cutting into the blade, in the direction of leaving the blade, and in one direction parallel to the blade. The advantage of this whetstone is that it minimizes the curling of the blade and can almost completely remove the curling of the blade, which is comparable to straight-line sharpening. However, strictly speaking, the rotating orbit of the cutting blade in this grindstone is not a perfect circle, and the polishing action is not uniform in many directions. Therefore, this disc-shaped grindstone is equipped with a blade positioning device, and by providing a guide device that guides the blade surface of the blade to this positioning device and two stop devices that stop this blade surface, half of the main surface of the grindstone is It compensates for phase 1α and widens the contact area with the blade, thereby making it easier to maintain the straight part of the blade, and also prevents "pull" on the whetstone that causes the blade to gouge or jag.

The disk-type knife polishing device according to the present invention overcomes the drawbacks of conventional disk-type knife polishing devices due to its novel shape. Polishing is performed on the main surface of the grinding surface, which is perpendicular to the axis of rotation of the grindstone. This means that compared to when sharpening with the beveled edge of an umbrella-shaped whetstone, the direction of the grind changes and the whetstone becomes flat! Since it is 0, it has the advantage that there is less curling of the blade formed. This polishing method uses a disc-shaped grindstone and a highly accurate blade guide device adjacent to it, and the gap between the disc-shaped grindstone and the blade guide device is narrowed, that is, the blade is removed.
．． This can be realized by making it less than 5875 mm (1/16 inch). This properly designed guide device can control the cutter with good reproducibility so that it is at a predetermined position and at a constant angle with respect to the main surface of the grindstone, regardless of its thickness, shape, or contour. can. This guide device is adjacent to the grindstone, and its guide surface extends from one end of the main surface of the grindstone to the other, and extends along and across the grinding line in the vicinity of the grinding powder. , the blade cannot be supported well, and even if the blade is short, the entire blade cannot be sharpened accurately. The cutting tool must be held by a guide device so that the polishing angle, that is, the angle between the cutting tool and the grindstone, does not change over the entire length of the blade surface to be polished. The guide device is preferably a magnetic guide device, but other types of guide devices are also possible. If the guide device is improved as described below, it will solve the drawbacks of the conventional disc-type grindstone, namely, when the cutter is set parallel to the surface of the grindstone, the cutter cannot be held correctly because the grindstone bites into the blade, and the grinding angle will be reduced. changed,
It becomes easier to remove defects such as gouges and serrations on the blade.

Disc-type 1ill grinders gouge or tJA-shape the blade when they cannot control the amount of force they apply to the blade and the rotating grindstone. In conventional sharpening devices, the force applied to the cutter and the whetstone is strongly influenced by the sharpening method and skill level of the sharpener, the thickness and shape of the cutter, and its design elements.The present invention overcomes these drawbacks. In order to remove the knife, place the handle of the knife so that the surface of the knife is on the guide surface of the guide device.
position the sea urchin. This installation is done manually. This attachment is preferably carried out by means of a magnet, in which case the face of the knife is lowered towards a disk-shaped grindstone until the first part of the blade of the knife to be sharpened comes into contact with this stone, and said disk is be moved a distance defined by a suitably selected piascar, then securely fixed in two stop devices,
This stop device is precisely positioned at a position suitably adjacent, but not in direct contact with, the periphery of the disk as described above, and the stop device is precisely positioned in a position suitably adjacent, but not in contact with, the periphery of the disk, as described above, and the stop device is precisely positioned to suitably adjoin the periphery of the disk, as described above, so that the disk is prevented from moving further toward the disk. and forcibly align the blade surface with the main surface of the rotating disk. The main surface of the disk [31] is parallel to the surface of the rest position during movement. The movement range of the disk is defined by the position of the surface of the disk at the rest position and the first
Determined by the position of the stop+L device that acts only on the blade surface,
The blade surface also contacts the surface of the disk. By using such a stop device to traverse the blade surface of the blade being moved, the position of this blade surface can be held accurately during polishing to prevent any damage to the cutting edge body. can do.

By using a guide device adjacent to the surface of the disk and a stop indicator device that acts only on one of the blade surfaces, the blade can be cut without being affected by errors in the thickness and slope ratio of the blade. The polishing angle can be maintained with high precision.

A rotating disc mounted on the armature shaft of a suitable motor is biased towards the guiding device, for example by a spring or by the armature, since these devices limit the movement of the disc. , when the cutter is removed, the surface of the disk directly adjoins the guide device of the cutter without contacting it.

The spring or spring biasing device applies a constant force directly or indirectly to the disc so that the blade moves the disc laterally and when the blade of the knife rests on the stop device, The surface of the disc determines the force applied to the blade surface. This method causes the disc to be "spring-loaded" onto the blade surface during the polishing process. When the disc is firmly attached to the armature shaft of the motor, the motor has a structure (axial clearance) that does not impede the lateral movement of the armada and its shaft; position and a movement position determined by the position of the blade face when facing the stop device. a leaf spring is provided at the end of the armadare shaft opposite the disk;
It is convenient to add the required amount of space to the disk. The leaf spring can, of course, be repositioned so that it presses directly against the back of the disk, or at some other point along the shaft supporting the disk. The force of the spring is essentially uniform depending on the movement of the spring, but it can also be non-uniform.

There are many devices that have different structures but the same bias action. For example, there is a structure in which the motor is supported by a bias spring so as to move toward the disk. Similarly, take the disc on the shaft and drive it in the seven shafts using gears, belts, and other devices, such that the spring is
The device acts directly on the blade surface or directly on the shaft of the disk (there is also a 14-shape model). Minimize range of movement.

The limit is a culm that can accommodate household cutlery of various sizes and shapes.

Equalizing the force control during sharpening of the blade surface of the blade allows the blade holding device to move precisely away from the fixed disk and accept blades of different thicknesses. This can be achieved by doing as follows. In the latter example, the disk is fixed such that it cannot freely traverse along the axis of rotation of the disk. in this case,
A spring or other biasing device acts on the retaining device;
Push this holding device towards the fixed disc.

However, if the knife is removed, the holding [! is quiet 1
It is adjacent to the disk at position IN, but it is difficult to make contact with it.

ril111? Even if you use a device that controls the force during polishing,
There is no change in the importance of changing the polishing angle of the disk or holding device.
The polishing distribution angle 1" is the angle of the guide charge, and this rI
1 grinding angle, the surface of the cutter is 1: of the abrasive disc.
Then ride. This lll1 grinding angle is independent of the thickness, width, or length of the cutter (1 is given. The face of the cutter is also the retainer;
abJL must not tilt when its relative separation -1 changes. For example, the disk l](iii
In the case of 67, the main surface of the disk-shaped grinding wheel (during the traverse of the disk, the rest position of this disk is tJ
It is necessary to maintain a state parallel to the main surface of the surface.

When using a type of knife sharpening device, in order to avoid accidentally damaging the side of the knife, e.g. due to carelessness during use of the sharpening device,
As part of the invention, a central hub, usually made of plastic material, on the disc projects from the main surface of the disc to a sufficient length to stop the blade face. This protruding position is 10 degrees above the cutting surface of the cutter, and the cutter is turned +L by the protruding hub before accidentally contacting the grindstone on the disk. The hub must have a shape that allows it to protrude without significantly interfering with the attachment and retention of the cutter to the annular portion of the disk. The hub can be used in a disc-type knife sharpening device, where the blade of the knife contacts the disc well below the center of the disc, and when the face of the knife contacts the disc well below the center of the disc during sharpening. This is the case in which it crosses in front of the rotational axis of the disk. A description will now be given of a protection device that can be used regardless of the position of the cutter on the disk.

Damage to the knife blade can also result from overheating of the blade during sharpening. As a protective measure against this, it is best to set the output of the motor to a level suitable for polishing, and it is inappropriate to increase this output excessively.

The reason for this is that if the blade accidentally bites into the disk or bends the disk +L, it will cause significant damage to the blade. The force exerted by the disc on the cutter is determined to a certain extent by the diameter of the disc, the speed and volume of the rotating device for the disc, and, if the cutter stops the disc, the energy of the disc's motion.

The diameter of the disc is 25.4 to 76.2 yrt (1 to 3 inches) and 1 no, and the rotational torque of the motor is 10.36 yrt.
If it is around 92Kg-cm (9 inch-lb),
ω1 grinding work can be carried out smoothly and damage to the cutter can be minimized. If the diameter of the disk is within this range, the energy of the polishing force can be sufficiently uniformized in the length direction of the blade, and the blade can be polished uniformly along the blade surface. It is also possible to set the diameter of the disk to a value other than the above if the motor is appropriately selected. A friction clutch may be used as another device to control the force, torque, and energy transmitted to the disk.

1 to 3 illustrate a preferred embodiment of a disk-type polishing device 20 for carrying out the improvements described above. A motor 24 is attached to the bottom plate 22, and a shaft 26 on the left side of this motor 2/I is connected to a grindstone holding device 28.
A disk-shaped grindstone 30 is attached to the surface of this grindstone holding device 28, and the surface of this grindstone 30 is a polishing surface.

The grinding wheel holder 28 and the grinding wheel are surrounded by a plastic enclosure 60 that has an opening to allow the grinding wheel to contact the cutter and is fixed to the bottom plate 22 with screws (not shown). . This bottom plate 22 is supported by rubber legs 32. The shaft 26 of the motor and its right-hand armature extension 44 rest on the bottom plate 22, and this armature extension 44 extends through a vertical support member 34.36 and is supported in a sleeve bearing 38.40. 34゜36 is attached to the bottom plate 22 with screws (not shown) etc. ζH
J is done. The bias device F/'12 is made up of a leaf spring and is supported by the bottom plate 22.
6, etc. J:゛τ Armaday extension part 44 is made to be able to move freely over a distance in the horizontal direction. In FIGS. 2 and 3, the cutter 48 is held by a cutter guide device 50, and this cutter 1
The blade surface 18 faces parallel to the surface of the grindstone 30, and the grindstone 30 rotates at right angles to the rotation axis of this grindstone. The hub 52 projects slightly from the surface of the grinding wheel 30 to prevent accidental contact of a portion of the blade surface with the abrasive surface of the grinding wheel.

The stop device n54 is integral with the vertical part of the plastic enclosure member 60, faces the cutter guide device 50, and reliably guides the moon surface of the cutter to the grindstone, as shown in FIGS. 1 to 3. At the same time, the position of this blade surface relative to the grindstone 30 is reliably maintained during polishing. This stop device 5/l only acts on vertical blade faces. The vertical portion of the enclosure member 60 is connected to the stop device 51
1, the vertical blade surface is the stop device 54.
When facing the enclosing member 60 at the position, the blade surface is arranged in a position parallel to the main surface of the grindstone. The aforementioned cutting tool stopping effect can be achieved by mounting the stop 1 device 54 independently of the use part 4460 in a position adjacent to but not in contact with the peripheral edge of the whetstone holding device 28 in any case. If the stop device F5'I is made of a material unrelated to the surrounding member 60, the stop device 54 may be made of various materials 11, such as plastic with high lubricity, martensitic steel, or a metal material for rollers. It can also be made of a weakly abrasive material F1, such as tJl'11, which can scrape off the curvature of the blade of a knife, or a material that lightly scrapes the blade when the knife moves on the stop device.

A plastic housing 58 encloses the motor 24, support members 34, 36, etc. The plastic enclosure 60 surrounds most of the wheel holder 28 and prevents the rotating wheel 30 from harming the wheel.

FIG. 2 shows a cross section of the blade guide device 50. This knife guide device 50 has a plastic structure 51, a hard magnetic piece that attracts the knife, and a knife face guide surface. Since the blade surface of the blade guide device is a grindstone, λI L ′c′ <7
The 'J angle' is set by the hard magnet 62, which is primarily located adjacent to the bevel 68 at the bottom of the cutter. A cross section of this cutter is shown in FIG. Whetstone 3
The guide device facing 0 is adjacent to this grinding wheel 30 but does not actually touch it, but is spaced apart to form a narrow gap 56 .

The η-extension portion 49, which is a part of the guide device 50, has an upper surface that is an extension of the cutter surface guide surface formed by the magnet 62, and the extension portion 50 of the guide device m50 is connected to each of the grindstone holding devices 28. The sides are in close contact with the enclosing member 60.

The cutter 48 shown in FIG. 4 has an upper slope 66 and a lower slope 68.
has. The blade surface 70 of this knife is as shown in FIG.
protrudes to form a blade. As the whetstone 30 rotates, the abrasive grains on the surface of the whetstone rotating with the whetstone exert a force on the blade 48 that is in contact with the whetstone, and this force forces the lower slope 68 of the blade 48 onto the hard magnet piece 62. Ride easily. As can be seen from the figure, it is extremely difficult and unstable to control the polishing angle by placing the lower slope 66 of the cutter on the grindstone surface, resulting in a decrease in accuracy. For example, if the knife is single-edged,
If the blade has the slope 66 shown in FIG. 4 but does not have the lower slope 68, this surface 66 extends to the blade surface 70, so it is of course stable with the guide device.

As shown in FIGS. 1 to 3, the grindstone 30 rotates. Preferably, the rotational speed is less than 800 feet (24.3.84 m) ff1 minute at the periphery. otherwise,
This is because the blade burns easily.

Although various rigid blade guides may be used in the disc-type polishing device, in order to control the polishing angle accurately, reproducibly, and with high precision, it is preferable to use the improved guide device as described above.

The hub 52 shown in FIGS. 1-3 extends a carefully selected distance 1 it (FIG. 5) from the grinding wheel surface and may be attached to the grinding wheel surface as shown. Even if it is press-fitted as a short culm into the center hole of the whetstone 30 and the whetstone holding device 28, it will not work. This hub 52 must not be made too thick. The reason for this is to prevent the hub 52 from getting caught on the surface of the guide device 50, and also to prevent the blade surface 70 of the cutter 48 from getting caught in the gap 56.
This is to make the grinding wheel 111 longer and in contact with the surface of the whetstone 30. However, the thickness t of the hub 52 is, as shown in FIG. 1, when the diameter of the grindstone is 25.4 to 50.
In the case of E3n seat (1 to 2 inches), it must be at least 0.2 culm (several tenths of an inch), and usually 0.2
5/l to 0.508mm (10/1000 to 20
/ 1000 inches). This is to prevent the lower slope 68 of the cutter from accidentally coming into contact with the abrasive surface 30. The thickness of this hub is usually several %Jx of the diameter of the grinding wheel.
It's below.

The thickness of the hub 52 in FIGS. 1 to 3 is set to 0.254 to 0.508 mm (10/1000 to 20/1000 inch).
can be made difficult to enter the gap within the internal space having the clearance angle γ shown in FIG. This angle γ is about 3° smaller than the polishing angle θ (usually about 20°) in the case of FIG. In the case of FIG. 2, the polishing angle O is the angle formed between the blade guide surface of the blade guide device 50 and the surface of the grindstone 30.

The clearance angle γ is the angle between the blade guide surface of the blade guide device 50 and a line from the blade surface to the leftmost edge of the hub 52. Grinding wheel 30 can be of any diameter and is rotated such that the linear velocity of its peripheral surface is less than 800 feet per minute. The blade surface 70 shown in FIG. 4 must be brought into contact with the grindstone at a position sufficiently distant from the center of the grindstone so as not to interfere with the hub. Typically, the grinding wheel has a diameter of 12.7 to 76.2 m (1/2 to 3 m).
The hub has a diameter of 1/16 to 1/4 inch, or about 10% of the diameter of the grinding wheel. The hub can be made of any material, but
Ideally, it would be made of plastic or a similar material. The reason for this is that even if the blade comes into contact with the blade during rIll 1m, the surface of the blade will not be damaged or damaged.

The point where the blade of the knife 48 crosses the 300 surfaces of the grindstone is F4.
As shown in FIG. 3, the guide surface of the cutter surface is determined by the height of a line 1J' (represented as a dot in the figure) which intersects the stop 1--plane of the vertical moon surface of the device.

Normally there is a blade slightly above this point. The abrasive grains of the whetstone 30 traverse the blade of the knife at various angles.

1 In other words, the abrasive grains in the part where the stone is formed cross the lunar surface in the direction in which the knife cuts (upward in Figure 3), although there are differences in angle, and most of the other parts of the magnet The abrasive grains cross the blade in the direction away from the blade (downward in Figure 3) after polishing the blade.
The abrasive grains near the center of the whetstone move almost parallel to the blade while making contact with the blade.

Present invention 1. : Each of the above-mentioned devices of the 4g knife polishing device is:
First, on a flat surface perpendicular to the axis of rotation of the whetstone, the cutter is precisely controlled by the drag force on the cutter.
Since it wears, what about the cutlery according to each scale angle in (i) above? J
It is possible to take advantage of the advantages of lumbering and therefore minimize the formation of curls on the blade.

Therefore, this disc 'Ji 1tll head apparatus is suitable for polishing as a preliminary stage to final polishing. At the stage of finishing r11121゛, the blade of the cutlery is polished to a thickness of 0.0025 mm with 1-) due to the action of the abrasive grains that grind at various angles of the whetstone.
Grind sharper on the order of 4 m (1/lr), 000 inches).

Returning to FIGS. 1 and 2, since the grindstone 30 is pushed toward the grindstone holding device by the leaf spring 42, the blade 48 held by the guide device 50 moves along the guide surface of the guide device. When pushed down until the surface engages the stop w54 on the surface of the enclosure member 600, this blade surface 70 forces the surface of the grinding wheel 300 laterally to the right from the rest position XX toward the bias device. Moved. Mo1 (The force with which the stone 30 presses the blade surface 70 is determined only by the force of the leaf spring 42.

The free movement distance of the grindstone 30 and the leaf spring 42 must be sufficiently long. The length of the cutter's moon surface is the stop device 5.
4, so that the grindstone 30 and the support shaft 26 do not reach their limits of movement, and there is still sufficient room.

What is extremely important is that the position of the blade guide device 150c can be improved so that the blade surface 70C is on the line from the center of the grindstone, as shown in FIG. In this case, as shown in FIG. 5, the hub 52a is unnecessary. The knife guide device 50c in FIG.
It is at a point "-" from the center of G, so the blade surface 70 of the cutter is 10 degrees from the center line of the grindstone 30. When the cutter 48 moves and lowers the guide device 50c, the vertical blade surface 70G of the cutter comes into contact with the surface of the whetstone 30 located on the top side of the body shown in FIG. (not shown), and the force of the other devices such as the spring A of the rebiasing device is fully applied to the vertical moon surface, but it is impossible to press the grinding wheel 30c beyond the free movement limit of the grinding wheel 30. It does not apply excessive pressure to the moon surface, and prevents the blade from getting caught on the grindstone as described in 1. Dotoshitsu stop station 5
/ IC1 Hit 15 If you measure the size on one side of the whetstone,
Move this blade surface horizontally parallel to the surface of the grindstone 30 B
During this horizontal movement, the grinding wheel does not need to come into contact with the lunar surface at all. Stop device 54 for enclosure member 60c in FIG. The surface c can be parallel to and perpendicular to the surface of the grinding wheel 30G, and therefore can be parallel to the vertical blade surface during polishing,
In addition, when the surface 1.1 of this stopping device 5/IO is on the surface of the calm stone 30c, it can be tilted slightly (several degrees) toward the blade guide device 50c, so that the surface 1.1 of the stopping device 5/IO can be tilted slightly (several degrees) toward the blade guide device 50c, so that the surface 1. is in contact with the guide device 54 and the guide device 5/IC
The surface of the guide device 5zC is slightly inclined vertically away from the guide device of the cutter to efficiently remove the curl of the blade and/or to remove the curl of the blade. Lightly cut the blade surface, especially the area adjacent to the blade.
Majesty can do 1J. It is not necessary to provide the stop 1-device H1, which has the same effect, as a part of the enclosure member 60G, but it is necessary to provide the stop 1-device H1, which has the same effect, as a part of the enclosure member 60G.
It may be attached to G-J.

As shown in Figure 13, is the polishing calm? Irrespective of whether this is done with a leat in the central part of the blade or elsewhere, it is possible to protect the surface of the cutter with a protective protrusion 72, and this protrusion 72 can be used during sharpening of the vertical blade surface 1 from the normal position of
Installed at approximately 6.35 to 12.7 m+ (approximately 1/4 to 1/2 inch)-J.

The blade guide device 50G can be made to protrude from the main surface of the grindstone by a distance d, that is, about 1.524 (60/1000 inch), and the perpendicular blade surface of the blade of the enclosing member 60c can be stopped during polishing. It can protrude tL from the traversing line. This protrusion 72 is connected to the surrounding member 6 as shown in FIG.
It can be part of the 0C or separated without loss of functionality.

As mentioned above, the bias action exerted by a spring on the blade surface of a cutter during sharpening applies force to the grindstone drive and support device, allowing the grindstone to move freely laterally and fixing the guide device of the cutter. J: I can embody it. A similar result can also be obtained by applying the bias action and restraining force to the blade guide device and holding the grindstone at a fixed position.

FIG. 5 shows a blade guide device 50a and a fixed whetstone 30.
Indicates a. The guide device 50a is free to slide laterally along the surface of the bottom plate 22a, but is pushed to the right by a compression spring 86 behind the cutter guide device 50H. In use, the cutter 48 rests on the surface of the guiding device, as shown in FIG.
The surface of the guide device is moved toward the surface of the grindstone until the vertical blade surface contacts the surface of the grindstone 30a. Furthermore, rather than moving the guide device 150a to the left side in FIG. 5, some force is applied so that the lower blade surface contacts the stop device @89 against the biasing action of the compression spring 86. . In practice, the stops 89 are an extension of the guides on each side of the wheel. The slope of the upper surface of this stop device 89 is normally parallel to the lower blade surface. Therefore, the angle that the upper surface of the stopper @89 makes with the main surface of the grinding wheel is the angle that the magnet 6
2a is generally larger than the angle made with the main surface of the grindstone. When the lower blade surface is in the plane of the stop device 89, the position of the blade is stable and the entire force of the spring 86 acts to hold the vertical blade surface against the grindstone 30a. The person performing the sanding operation can sense when the lower blade surface engages the stop 56a. The reason for this is that the knife holding bag [F
This is because more force must be applied to move r50a further beyond that point. Stop device 8
The slope of the upper surface of 9 can alternatively be set at an angle approximately perpendicular to the blade of the cutter to provide a more limited stopping action. The grindstone 30a in FIG. 5 is in a fixed position and is not free to move laterally parallel to the axis of rotation of the grindstone. When the cutter 48a is removed, the guide member 50a moves to the right, the distance of movement being determined by the stop device 90 of the guide device, and in this case, the guide member 50a moves to the right. Reference numeral 90 forms a rest position for the guide device 50a, and the blade guide device t & 50a is not moved in a fixed position relative to the surface of the rotating grindstone 30a, but is spaced apart from and adjacent to the surface of the grinding wheel 30a through a limited gap 56a. The shaft 92 aligns the blade guide device ff50a and the grindstone 30a.
This shift 92 is maintained by a support member 96.
The support member 96 is fixed to the bottom plate 22a. More than one spring shaft can be used to increase the precision of the position and free movement of the guide. The stop device 89 acts on the lower blade surface in FIG. 5, and must be kept in a position such that the vertical blade surface 70a is aligned with the main surface of the grindstone for grinding.

The hub 528 shown serves the same function as the hub 52 of the knife sharpening apparatus 20 of FIGS. 1-3. The angle θ is rIIT
This is the grinding angle, and its value is larger than the angle of the cutter guide device 50a, grindstone 30a, etc. The angle γ in FIG. 5 is the angle between the surface of the blade guide device 50a and a line extending from the upper end of the blade surface 70 to the surface of the hub 52a.

The disk edge cutter (I) 1 grinding device, which is an improvement on the embodiment shown in FIGS. I explained that it is possible to make an excellent blade.This tilt blade has historically been used in conventional grinding wheels, umbrella-shaped grindstones, hard natural R1, and other undesirable abrasive effects. It was also explained that the sharpening of the blade is extremely low compared to other polishing devices.Because of this rapid sharpening action, smooth polishing, ease of use, and low curling, the disk type according to the present invention An ideal knife polishing device can be created by combining it with a knife polishing device that rotates a flat whetstone along a predetermined trajectory.A knife polishing device that uses the flat whetstone has a large polishing force. Although it is a device, if we compare the case where the grain size of the abrasive grains is the same, the disc type cutter rIl based on the present invention
lr! The polishing force is smaller than the 1 device.

This disc-type knife polishing device uses relatively coarse abrasive grains.
That is, a particle size range of 100 to 180 is used. O
The flat whetstone type knife polishing device described in ff is used to polish the previously polished knife with this disc edge knife polishing device.
J of sharpness at about 5/I (1/10.000 inch):
It can be sharpened into a thin blade. If the blade does not have sharp edges, it can be quickly finished sharpened using the flat whetstone type cutter ω1 grinding head. Said flat nail stone-shaped knife? Although it is possible to use other conventional knife sharpeners to sharpen knives before they are placed in the i11 grinder, the improved disc-type knife sharpener is particularly superior, for the reasons described above. .

Especially ff! When sharpening a blade that has been polished or has a poor finish,
A novel combination of the improved disk-type knife polishing device disclosed in No. I can do it. The device shown in FIGS. 11 and 12 combines the two novel polishing methods into one blade polishing device, and with this device, you can quickly and reliably polish a knife with a higher level of reliability than ever before. It can be honed to a razor-sharp edge.

The improved disc-type knife polishing device in combination with the flat whetstone-type knife polishing device is illustrated in FIGS. 11 and 12. The bottom plate 22b (FIG. 12) supports a motor 24b, which is fixed to the bottom plate 22b by a spring or the like (not shown), and a shaft 26b on the left side of the motor 24b drives a grindstone holding device 28b. A whetstone 30b is attached to the whetstone holding device, and this whetstone 30b
rotates at approximately 300 ORPM, and the peripheral speed of this grinding wheel is 243.847 FL per minute (approximately 800 feet per minute).
Make sure not to exceed. The reason for this is to eliminate the risk of the blade overheating. A fan 100 mounted on shaft 26b cools motor 24b. Air enters the knife sharpener through the annular portion 102 between the top cover 104 and the bottom cover 106 and is exhausted out through a bottom opening 108 in the bottom plate 22b supported by rubber feet 32b.

Vertical support members 34b, 112.36b (FIG. 12) are held to bottom plate 22b with strong adhesive or screws (not shown) to support upper horizontal support member 116, which The cutter guide 118 is supported on a cutter guide bottom 120, which is secured to the horizontal support member 116 by one or more screws as shown. The driving gear pulley 124 is attached to the extension part/14b (Fig. 12) to the right armature armature shift V 1, and two gear pulleys 126 (only one is shown) are connected to the same! Ill drive, this synchronization is timing bell 1-128
I'm going to go to (teeth). The armature left extension part /1/Ib and the shaft 130 are the gear pulley 12
6, and the sleeve bearing 132
This sleeve bearing 132 is mounted on the vertical support member 112.
．． 36b. A more detailed explanation is provided in the above-mentioned application filed on the same day. Two synchronous drive cranks 134 are formed by machining at the end of the shaft 130 and are inserted into bearings 13F' made of fluororesin with glass 1liIff, which bearings 138 are inserted into the drive plate 136 and are inserted into the shaft bearings 13F'. 3, which causes the drive plate 136 to make an orbital motion.
Figure 2 includes 1,390 sets of 3 or more support bearings! consisting of 2
A set of support bearings is shown, which support bearings are attached to the bracket 141.
, the horizontal support member 116, and the support device 36b, and supports the drive plate 136 in a movable manner.
36 is held in a vertical plane so that the vertical movement distance with respect to this vertical plane is minimized. An orbiting yoke 142 is attached to the drive plate 136 by screws 140 and has an upper arm 1471 to which an orbiting abrasive 146 is attached. With this construction, orbital movement of drive plate 136 causes orbital movement of abrasive material 146.

The knife guide device 118 shown in FIGS. 11 and 12 includes a plastic structure 148 that includes a magnet 150 that attracts the surface of the knife and forms a guide surface for the knife.・Pull. The knife guide device! 118 also includes a cutter stop +1 round 152 (FIG. 11). The guide device 50b is used with the disc-shaped abrasive 30b and includes a plusbook support structure 154 that is connected to the shroud 60.
It extends to and contacts the surface b. This support structure 15
/1 includes a magnet 62F) which controls the angle that the face of the cutter makes with respect to the disc-shaped abrasive 30b.

The magnet 62b attracts the knife and defines the plane of the knife which is essentially the same as that described as J in FIG. When using this knife polishing device, the guide device 50b
Then, the blade of the knife is engaged with the stop device 54b on the face of the enclosure member 60b. The drive crank 134 can be integrally coupled to the shaft 130 in the manner described above;
It can also be separated from this shaft 130.

Motor 2/lb is this motor 2 as shown in Figure 12.
The armature 4b and the shaft 26b must be provided with an axial gap that allows the grindstone 30b to move within its permissible movement range in the direction of its rotational axis and receive the thickest blade to be polished. The shaft 26b is shown on the right side of the motor as an armature shaft extension=1/Ib. The axial gap is 113 at the free end and 1.
Approximately 586 mm (1/16 inch) is appropriate. This appropriate condition means that the grinding wheel 30b is attached to the free end.
12 without reaching the limit of movement determined by the axial clearance between the two ends, meaning that it is suitable for receiving most of the cutting tools therein.

By this method, as shown in FIG. 12, the cutter is inserted between the guide device 50b and the rotating disc-shaped grindstone 30b, and the grindstone 30b moves to the right in the figure and floats against the bias of the spring 42b. do. This spring 42b applies the stress to the shaft extension 44b via the thrust bearing 46b, and this stress is transmitted to the shaft 26b and the grinding wheel 30b via the armature of the motor.

If the motor armature does not have adequate free end axis clearance, the wheel 30b will stop because movement of the motor armature forces the motor armature against an internal stop (usually a thrust 1 bearing, not shown). +L,
Therefore, the rotating whetstone 30b applies an excessive force to the knife, and this excessive force gouges the blade of the knife and causes physical damage to the blade! Ru. A member 60 surrounding this spring method
By adopting the device 5/Il') for stopping the surface of the blade and the connection with the guide device of the blade, the force applied to the blade of the blade during polishing can be kept relatively constant, and the force can be adjusted along the sharpness of the blade. It is possible to grind the grinding wheel without creating a gouge.The surrounding member 60b of the grindstone at the bottom of 7i in FIG.
4b serves as a safety cover and structural part, but the grindstone 3
0b and the guide member 50b without hindering the insertion of the cutlery,
It has a shape that does not prevent the blade surface from coming into contact with the surface of the grindstone 30b.

By combining the two new types of knife polishing devices into a single knife polishing device, we have created a series of tools that allow unskilled workers to sharpen blades with extremely complex shapes and extremely sharp edges. It is possible to realize a blade guide member that optimizes the polishing angle θ.

1ilN The friction angle O is between the surface of the guide device on which the cutter is placed and the second
It is determined by the movement of the abrasive material shown in FIGS. It has been found that by making the polishing angle relatively large and carefully controlling it during successive polishing steps, the total polishing time can be significantly reduced and the knife edge can be reliably sharp. Although it is not fundamental, the method of positioning and holding the blade at each polishing stage should be basically unified, except when the polishing angle of the blade is intentionally changed. It is desirable to simplify as much as possible the structure of the guide device and the subsequent stages of polishing by a knife polishing device that forces the abrasive material to follow a predetermined trajectory.

Factory-produced cooking knives typically have, for example, a total grinding angle, ie, an angle intersecting phase n of the blade surface 70 in FIG. 4, of greater than 40°. Since it is extremely rare for the owner of the blade to know the actual angle of the blade surface, a real sharpening device must have the ability to quickly and safely sharpen the blade regardless of the angle of the blade when it was new. [I have to. When sharpening a razor blade, sharpen it! ! Make the grain size finer ('J), and the finer the polishing speed will be.If you know the angle of the blade surface when the tool is new and can control the polishing angle, finer rtlT. It is possible to use a flat material or to sharpen the angle J: 1 to 2 degrees when the meat surface is new, so the amount of polishing is reduced and only the closest part of the force is applied.
Fl (J is sufficient. However, if you do not want to sharpen the blade too much when sharpening it many times, you will have to make the angle of the blade larger than before sharpening, so the sharpened blade will The present invention solves this problem for the first time, and it can be sharpened like a razor blade even if you do not know the angle of the blade surface when new.
Milling is performed by coarsening the abrasive grains using a disk-type knife polishing device, and then a flat whetstone is used to draw a predetermined trajectory.
Using an rIl device, the grinding angle is reduced, usually the grain size of the abrasive is made finer, the speed of the whetstone is slowed down, and the whetstone draws a unique trajectory to precisely sharpen the knife to a predetermined edge angle. This is realized by finishing it like a large razor blade.

The advantages of the present invention in actual polishing will be explained with reference to FIG. In this Fig. 6, r of the cutter to be polished is
tll l! 7! The angle of the front blade is 45° like most cooking knives (example), and the angle of the polished blade of the disc-type knife sharpening device T: Jijl shall closely match that of the cooking knife. . The angle of this blade is the <[Lee angle trace of the two blade surfaces 70 in FIG. 4.

The grinding angle of the blade by the disc type knife polishing device must be smaller than the N grinding angle of the blade by the orbital knife polishing device. For convenience, this angle is assumed to be 34° as shown in FIG. In order to do this, the blade must of course be sharpened considerably, and this polishing is performed using the disk-type blade device, and in order to do this quickly and with almost no burrs on the blade, a so-called A grindstone with a grain size of 100 to 180 is optimal. If the angle of the blade before the start of polishing is smaller than 34°, it is not necessary to set the angle of the blade to 34° in the disk-type knife polishing device.

The blade, which has been ground to 34°, is as shown in Figure 7, and is polished like a razor blade using an orbital polishing device in one to several stages. When performing two-step polishing, first use a coarse grindstone (which can be polished by 5I), and then use a fine grindstone to give the blade a smooth finish.

If we illustrate the two-stage polishing between orbital type polishing and JA,
The blade in Figure 7 was polished to a total blade angle of 34° in the 111th IT polishing stage! ,': A blade, which is rapidly ground to 40° with an orbital grindstone having a grain size of about 180. At this stage? iI
In the LJ polishing, only the part of the blade surface near the cutting edge is polished as shown in FIG. 7, and the polishing range is significantly narrower than that in the previous polishing by the disc-type polishing tool.

The blade after this rIIl polishing is shown in Fig. 8, 1'. The angle 1α of this blade near the stripe is 3/I°, and the angle of the cutting edge is 40°. In the final polishing stage using the orbital polisher, a so-called grindstone with a grain size of about 600 to 1500 is used to further sharpen a portion very close to the cutting edge to an angle of 45°, as shown in FIG. 9 (enlarged view). Since this series of rtII* can be performed with one polishing device, use a high viscosity tα blade guide device and gradually increase the polishing angle at each successive polishing step. , the disk-type polishing device can be used exclusively for grinding. Although the orbital type polishing device can polish a relatively small amount, it can finely polish the blade. Each sharpening step is intended to sharpen the tool quickly and bring it to a razor-perfect finish. The shape of the cutter in this example after polishing is not shown in FIG.

This figure is a larger enlargement than Figure 6 before polishing. The polished blade shown in FIG. 10 has three slopes along the blade surface 70, that is, blade surfaces with angles of 34°, 40°, and 45°,
These three slopes become closer to the cutting edge in this order. This 45
The profile of the blade surface of ° is extremely short, usually 0.762 m (0
, 030 inches), the blade can be quickly polished using a fine-grained whetstone and an orbital polishing device without leaving any burrs. To remove minute curls on the blade, before polishing the blade with the grindstone 1/16 of the orbital polisher,
It can be removed into the cylinder by pressing it against the blade guide device 152 of FIG. 11 and sliding it in contact with it. When re-sharpening a knife that has been ground once, as explained above, the angle of the blade surface is adjusted to 40° without grinding with a disk-type grinding device.
An orbital polishing device set at 45 degrees can quickly create a sharp blade. After the above-mentioned series of polishing, or after severe use, it is necessary to perform polishing at the above-mentioned leading angle using a disk-type polishing device.

A knife polished in this manner has an extremely superior sharpness compared to a knife polished using a conventional knife polishing device. The cutlery polished as exemplified above has the following characteristics as shown in FIG.
The blade has three extremely small inclined surfaces. The reason why a blade with many small inclined surfaces cuts well is because the angle of the inclined surfaces decreases from the cutting edge toward the stripes, so the part near the stripes is the part immediately behind the cutting edge, and the angle is small. This is because objects cut by the cutting edge easily move or do not stick on the back surface of the cutting edge. A knife having a suitable micro-edge surface, such as the one made according to the present invention, can easily scrape the surface of the object to be cut very thinly. This is in contrast to the case where the blade is a flat plane consisting of only a single angle, which tends to cut into or penetrate the surface of the object being cut.

With the above explanation, disc! 11 The novelty of combining the blade sharpening device and the above-mentioned orbital blade grinding device (ill grinding device) into one device is obvious.Even an extremely dull blade can be sharpened quickly by an unskilled person and thickness 0.002
It can be finished in the same way as a razor blade of Fllllll+ (1/10,000 inch).

FIGS. 14 and 15 show the embodiment of the present invention using a split disk.11-o This double disk can be operated from one side of the Tl1I polishing device N to polish both sides of the blade of the cutter. This is particularly useful when In this construction, two disc-shaped azurites 30d, 30d are held back-to-back on a drive shaft 26d and stopped in a rest position by a biasing mechanism [spaced relative to the device, said biasing mechanism comprising, for example, a spring 100; Press the two discs above,
The two grindstones are separated. The two discs move along the axis of the shaft, the movement being limited on one side by a stop or pin 101 on the shaft and on the other side by the second disc or biasing mechanism.

Each of the disks may be moved against the biasing mechanism toward the opposing disk, but the blade to be sharpened may also be moved against the biasing mechanism when the blade to be sharpened is moved against the biasing mechanism. Whenever the disc grinding wheel is held in the stop device, the disc (, 1, common shirt), upper Each disk is rotated separately by a pin 101 at the same speed as the shaft.

This pin 1 is fixed to or passed through the shirt 1 and is engaged in a slot portion 102 of the hub of the disc grindstone. This pin 101 can also act as a stopper to control the position of the disc grinding wheel at this body 11-position. Other devices for driving the disc grinding wheel as it slides on the shaft will be obvious to those skilled in the art. A grindstone mounted on the outer surface of each of the disks 30d, 30d and rotated by the shaft 26d is pressed against the blade surface of the cutter by the force of the spring or the bias device.

The polishing speed during polishing of a given cutter and a given shape of a whetstone is determined by the speed of the abrasive grains of the Pyasuka and the whetstone.

Although not shown in FIG. 14, the stop (FIG. 2) extends sufficiently toward the disk to prevent over-insertion of the cutter and to support the vertical blade surface of the cutter. Therefore, the stop indicator device 54 limits the speed of insertion of the cutter and also limits the movement of the disc (1) toward the spring.

The present invention can also be adapted to attach a suitable number of discs to each shaft to perform different types of abrasive operations, such as coarse abrasives, fine abrasives, or processes in between.

[Brief explanation of drawings]

FIG. 1 is a plan view of a disc-type knife polishing device improved based on the present invention, and FIG.
1 is a cross-sectional side view of a blade polishing device; FIG. 3 is a cross-sectional side view of the disc type blade polishing device shown in FIG. 1 taken along line 3-3; FIG. 4 is a cross-sectional view of a typical double-blade blade; FIG. 5 is a sectional view of another disk and cutter guide device according to the present invention, and FIG.
Figure 7 is a cross-sectional view of a blade whose total angle is 45° and which is being polished to 34° by a disc-type blade polishing device. FIG. 8 is a cross-sectional view of a blade that has been polished to 40 degrees by the orbital type knife polishing device according to the present invention as the next step; FIG. Cross-sectional view of the blade made at 34″ and 40° along the blade surface during polishing of the orbital type blade polishing device of the stage, No. 9
The figure shows the blades set at 34° and 40° along the lunar surface.
The second stage orbital type knife polishing device reduces the total angle of the blade to /1
FIG. 10 is a cross-sectional view of a cutter that is polished at an angle of 5° rIII, according to the present invention.
Figure 11 is a cross-sectional view of a cutter that has been polished to 34°, 40", and 45' along the blade surface by a step-type orbital cutter polishing device, and has a finished blade surface. A plan view of a device in which a blade polishing device and a two-stage orbital type blade polishing device are combined into one blade polishing device, 1st
FIG. 2 is a cross-sectional side view taken along line 12-12 in FIG. 11 of a device in which a disk-type knife polishing device and a two-stage orbital knife polishing device are combined into a single knife polishing device based on the present invention. 13 is a side view of a cutter guide device having a protrusion for preventing accidental abrasion of the face of the cutter, FIG. 14 is a side view of another embodiment of the invention, and FIG. 15 is an implementation of FIG. 14. Example!
FIG. 15 is a cross-sectional view taken along line 15-15. 20... Disk type polishing tool, 22... Bottom plate, 24
... Motor, 26 ... Shaft 128 ... Grindstone holding device, 30 ... Grindstone, 34. 36 ... Support member, 38.40 ... Sleeve bearing, 42 ... Bias device, 44 ...Armatia extension part, 46...Thrust bearing, 48...Cutter, 50...Cutter guide device, 5
2... Hub, 54... Stop device, 56... Gap, 58... Housing, 60... Enclosing member, 62...
... Magnet, 66... Upper slope of the knife, 68... Lower slope of the knife, 70... Blade surface. Procedure n-n-nmi (method) July 2, 1985] dayff1fll 6 () (Vui B'F Application No. 492
No. 07 No. 2, Invention 2. Relation to Patent applicant Danil, Dee, Freel 4, Substitute (Zip code 100) June 10, 1985 (Shipping date Showa) (June 25, 1960) 6. Power of attorney subject to amendment, Ming II, drawing 7, contents of amendment (1) The power of attorney is amended as shown in the attached sheet. (2) Purification of all clear and drawings (in the contents) No change)=537-

Claims (1)

[Claims] 1. A rotating shaft made of a ferromagnetic material and used for polishing a two-edged blade, and a disk held by the shaft to form a main surface perpendicular to the axis of rotation of the shaft. a shaft rotating device that rotates the shaft about its axis of rotation to move the abrasive surface in the direction of its axis of rotation; Adjacent along the polishing surface, a guide surface for the surface of the cutter is determined, the angle of this guide surface with respect to the main surface is a predetermined angle, and the first blade surface of the cutter is A knife polishing device comprising: a guide device having a magnetic field directed toward the main surface; and a bias device pressing the polishing surface against the guide device. 2. a pair of stops for said first blade surface, said stops spaced adjacent said disk-shaped abrasive surface along a periphery of said disk-shaped abrasive surface; The knife polishing device according to claim 1, characterized in that the movement is limited and the position of the first blade surface on the polishing surface is controlled. 3. The biasing device is mounted on the end of the shaft by a spring, and this shaft is the shaft of a motor, and the shaft of this motor does not hinder the movement of the polishing surface while the cutter is inserted. A knife polishing device according to claim 1 or 2, characterized in that it has a suitable free interaxial gap for receiving this polishing surface. 4. The abrasive surface is circular and has a coaxial hub with a diameter limited to approximately 10% of the diameter of the abrasive surface and 0.025 mm (1/1000 inch) from the abrasive surface. ) The blade polishing device according to any one of claims 1 to 3, characterized in that the length protrudes by less than 5% of the diameter of the polishing surface. 5. The knife polishing device according to claim 2, wherein the stopping device is a roller bearing. 6. The abrasive surface is circular and has a protective shroud adjacent to the periphery of the abrasive surface, with a portion of the shroud facing the guide surface and extending from the guide surface. 6.35 mm (1/4 inch) from the intersection line of the surface and the main surface
at least 0.025 mm (1/1000 inch) apart and extending beyond the main surface perpendicularly to the polishing surface toward the guide surface and less than 5% of the diameter of the polishing surface during polishing; A knife polishing device according to claim 2, characterized in that a surface of said knife is prevented from coming into contact with said polishing surface. 7. The disc-shaped abrasive surface is held on the shaft by a device that prevents relative movement between the two surfaces, and the biasing device is a spring acting on the shaft. A knife polishing device according to claim 1. 8. The disk-shaped abrasive surface is slidably held on the shaft, a second disk-shaped surface is slidably held on the shaft, and the biasing device acts on both disk-shaped surfaces. A knife polishing device according to claim 1, characterized in that said disk-shaped surfaces are separated from each other. 9. Used for polishing a cutter having a pair of blade surfaces, a shaft having a rotation axis, a disc-shaped polishing surface held by the shaft and forming a main surface perpendicular to the rotation axis, and the cutter. a guide device for rotating the shaft about the axis of rotation of the shaft; a device for allowing the guide device to move along the axis of rotation of the shaft; and a device for moving the guide device along the axis of rotation of the shaft; a biasing device pushing toward the abrasive surface, and a major surface of the disc-shaped abrasive surface of a blade surface positioned along and spaced adjacent to the periphery of the member having the disc-shaped abrasive surface; a pair of stop devices for controlling the position of said one blade surface on said disc-shaped polishing surface by limiting movement parallel to said blade polishing device. 10. a motor-driven rotating disk having one or more flat second abrasive surfaces including a first abrasive surface forming a first major surface and a plurality of abrasive members forming a second major surface; a device for causing a uniform periodic motion on the surfaces to move each of the polishing surfaces within the main surface or parallel to the main surface, spaced apart and along trajectories of basically equal width; A knife polishing device comprising a guide device that maintains the plane of the knife and the blade at selected positions and angles, respectively, in a plane including the main surface and orbit of the disk. 11. The knife polishing device according to claim 10, wherein the angle of the guide device with respect to the main surface of the disk is smaller than the angle with respect to the raceway surface. 12. The knife polishing apparatus of claim 10, wherein each abrasive on said second polishing surface has a trajectory for rotation of less than about 1 inch. 13. The knife polishing apparatus according to claim 10, comprising a spring-loaded biasing device for moving the disk relative to the spring-loaded biasing device at right angles to its surface, and a device for not tilting the disk. . 14. The knife polishing device according to claim 10, which is used for polishing a knife made of a ferromagnetic material, and wherein each guide device has a magnet. 15, including a pair of stops along and spaced adjacent a periphery of the disk-shaped abrasive member to limit movement of the cutter in the direction of the disk; The knife polishing device according to claim 10, characterized in that the position of the upper knife is controlled.