JPS60104640A - Shape cutting and edge polishing device for regenerating rotary cutter - Google Patents

Abstract

PURPOSE:To enable a rotary cutter blade of a rotary sickle to be regenerated into the one like new without the material of the cutter blade being altered, with the use of a device for regenerating the rotary cutter blade, by carrying out the formation of the edge surface of a worn blade, the polishing of the blade and formation of the flank of the blade with the use of a disk-like grind stone. CONSTITUTION:A rotary cutter blade regenerating device comprises a means A for holding a mowing blade 2 and a cutting means B composed of a rotary grind stone 3. The holding means A is composed of a longitudinal feed mechanism 6, a transverse feed mechanism 7, an inclining mechanism 8 and a holder section 9. The longitudinal feed mechanism 6 is provided with a stopper 24 for securing a longitudinally moving retainer plate 14 at a predetermined position 1. The inclining mechanism 8 clamps a semi-circular rotatable plate 26, and supports it at its center by means of a short shaft 27. This rotatable plate 26 is formed with a inclined angle determining hole 20 into which an engaging pin 30 may be inserted and secured. A support plate 34 and a retainer plate 36 for clamping a blade 2 to be regenerated is journalled to a holding section 9, and a locking pin 38 may be inserted into an edge determining hole 37 in the plate 36 in the vicinity of the periphery thereof. The cutting means B is arranged to be secured so that the rotary grind stone 3 is secured, adjustably in the height, longitudinal feed and inclined angle thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a full-cut powerless sharpening device for regenerating a rotary blade, such as the blade of a rotary ψ cutting sickle.

For example, rotary mowing blades are widely used for cutting vegetation at farms, ranches, forestry stations, golf courses, etc.

However, since mowing blades cut close to the ground, soil and
The cutting edge tends to wear out when it comes into contact with gravel, etc., and it is not uncommon for the cutting edge to chip if it hits pebbles, etc.9. Conventionally, to regenerate the mowing blade, the entire blade is cut and sharpened by applying it to the outer peripheral surface of a wide grinder. However, with this method of grinding, the work is done simply by visual measurement and using a saw, so it may not be possible to accurately divide the 2-blade, 4-blade, 8-blade mowing blade, etc., or the dimension from the center to the cutting edge may be incorrect. It is difficult to regenerate a uniform blade because the slope of the blade edge is different. Grinding with a small grinder, which is common among farmers, takes time and effort, and is very dangerous for the elderly and women who are actually engaged in farming these days. Moreover, the heat generated during the time-consuming grinding with a grinder causes the cutting edge to become burnt or completely annealed. There are problems with the blade becoming dull or having a curved edge. Therefore, most farmers who have rotary mowing blades give up on remanufacturing the mowing blades themselves and use new ones, and each household has a few to several dozen old mowing blades. It is also often left abandoned. These old mowing blades are sometimes brought to mowing sickle shops and service stations for recycling. However, even at the store, the regeneration method is a grinder.
Since it is a 11+" cut, it is not easy to regenerate it into a uniform blade like the one above, and it takes time and effort, and it can only be regenerated into a blade that has been calcined and has no durability. However, the current situation is that even if they are brought in, they are not enough.The same can be said about rotary blades other than mowing blades.

The present invention relates to a full-cut powerless sharpening device for regenerating rotary blades, and is intended to solve the above-mentioned problems of conventional means. In other words, the objective is to make it possible for anyone, such as an elderly person or a woman, to take an old rotary blade with a worn or chipped edge and make it as balanced as a new one, and to improve its quality by hardening and annealing. This is a powerless sharpening device for rotary blade regeneration that allows both full-length cutting and blade sharpening to be performed easily and quickly without any changes, and enables the regeneration of old rotary blades that are widely left unused at farms. We are trying to provide the following.

The invention will be explained below by means of illustrated embodiments.

First, the device of the present invention has a holding means (a) for a mowing blade (2), which is a rotary blade as a blade to be subjected to FJ, and a cutting means (I3) using a thin disc rotary grindstone (3) on a base +11. It will be equipped with.

That is, the base f1+ has a slightly oblong shape with legs (4) at the bottom, and a horizontally long slot (5) is formed slightly toward one side of the center (toward the right side in FIG. 1).

The mowing blade holding means (3) consists of a vertical feeding mechanism (6), a lateral movement mechanism (7), a tilting mechanism (8), and a holder part (9). The vertical feed mechanism (6) has a pinion (U) mounted on a shaft (lO) perpendicular to the slot (6) at the bottom of the base (1), which projects slightly upward from the slot (5). The pinion (11) can be rotated by a vertical feed lever H provided by extending the shaft (lO) toward the hand if side. A pair of chi F materials (1a) (I
a) are installed horizontally in the longitudinal direction, vertically movable receiving plates (14) are slidably aligned between the guide grooves formed on each inner side, and racks (15) are provided in the longitudinal direction below. nfJ pinion (11) mesh with the upper part, 11j pinion (12)
), the receiving plate (14) can be vertically fed in the longitudinal direction via the pinion (II)/rack 1f51. The lever (12) is not directly connected to the shaft (10j) of the pinion (11), but is connected to the shaft (
1u), press the base of the lever (12) with a spring in the center of the inner side, fit it into the EJ turn with a bolt, and then tighten the lever (12).
12) is held in the recess and rotated intermittently to make it possible to vertically feed the receiving plate (14) via its short cylinder, shaft (10), pinion (11), etc.

The horizontal movement 11XIJ plate structure (7) has a stop plate (16) long in the front and back direction on the receiving plate (14) near the other side of the receiving plate (14).
The push plate (17) facing the push plate (17) is placed in the front end of the tightening threaded rod (18), and the central part of the threaded rod (18) is placed on the receiving plate 114. ) is screwed into the female threaded section (19).

By loosening the threaded rod (18) with the handle (20) on the negative side, the fourth
As shown in the figure, a pair of horizontally moving & (2) doors that are long in the front and back direction can be slid back and forth to enable positioning.

In addition, the vertically movable receiving plate (14) has a kite rod (2
'lr and fix it in the titration position with the thumbscrew 2
The base (1) is provided with stoppers (23+ +241).
It can come into contact with the upper stop member (25).

The tilting mechanism (8) is a semicircular 11-turn mechanism that has a notch in the upper part and accommodates a holder part (9), which will be described later, between the raised central parts of the pair of lateral movement plates (21), as shown in FIG. A plate (26) is sandwiched between them, and the center is pivotally supported by a short shaft (27). The rotatable support plate (2
In 6), several holes 8) for determining the angle of inclination are formed near its periphery, and the holes 128 for determining the angle of inclination are connected to the round holes (,! The locking pin (30) is inserted to maintain the rotational plate (26) at the desired angle.

The holder part (9) is connected to the rotatable plate (26) as shown in FIG.
A support plate (3υ) is fixed to the side in part 1, and a support plate (B) with a male screw thread Q protruding upward in the center is attached to the support plate (B) with a male threaded cylinder (to) at the top of the center. The mowing blade (2), which is the blade to be regenerated, is inserted and placed in between, and a presser plate (to) having 16 holes for determining the direction of the blade edge at equal intervals near the periphery is placed in the central hole. The pin is a locking pin that can be inserted into one of the holes for determining the direction of the cutting edge marked U, and the pin can be inserted into the cylindrical hole and placed. The other side of the housed side piece c3 is supported by a horizontal shaft on the hinge at the tip of the support plate 0.G4 is a nut for clamping, and the mowing blade (
2) An example of a support plate sandwiching a presser plate is screwed onto a cylindrical male screw and attached with a thread.

The hinge Q is a wing nut for fixing the support plate, and is designed to be screwed onto the end of a male threaded rod protruding upward from the cylinder of the support plate.

The cutting means [F]) has a thickness of 2 parts m and is rotated by a motor of 9υ.
This uses a thin disc grinding wheel (3) with a diameter of 4, and the vertical plane of the disc grinding wheel (3) is parallel to the longitudinal feeding direction, and if changed, the rotation axis or the rotary blade holding means (5) is It is provided so as to intersect with the longitudinal feeding direction. That is, a part of the outer periphery of the helper plate grinder (3) should face the MfJ record holder capital (9) side,
A bracket H is mounted on the lower part of the support arm (6) with a horizontal axis perpendicular to the longitudinal feeding direction, and the bracket H has a circle (circle) at the lower part. On the other side of the base (1), a disk with a large number of holes for determining the angle of inclination is erected on the other side, and a vertical VC is installed on the disk. How many times should the UJK shaft be supported by the short shaft in the same direction as the feed direction, and the support arm (6
) The locking pin Q5υ can be pushed into either of the inclination angle determining holes (G) from the round hole formed in the circle on the side ( ). In addition, adjustment bolts Q114 wheels that support the lower part of the support arm (6) are screwed onto the lower and side parts of the bracket of the support arm (6) so that the height position of the disc grindstone (3) can be adjusted. It is.

Next, the operating state of the present invention will be explained using the above-mentioned embodiment in a case where a mowing blade with eight blades is regenerated. K, which regenerates old mowing blades that have become worn out or damaged due to long-term use, is a straight-cutting method in which each cutting edge on the periphery is divided into eight equal parts, and the length from the center to each cutting edge is uniform. It is necessary to sharpen the cutting edge of a famous sword. Therefore, in order to set the mowing blade (2) on the holding means (A) as shown in Figure 1, remove the wing nut function of the holder part (9), remove the presser plate thickness, and place it on the support plate. Place the mowing blade (2) face down, that is, with the old cutting edge (2a) of the famous sword facing upward. Place the holding plate (2) on top of it, and screw the nut 0 into the lotus screw of the cylinder (end), screw the wing nut on the end of the male threaded rod, and rotate the tilting mechanism (8). Rotate the plate (firefly) around the short axis (27j) and insert the mowing blade (2) as shown in Figure 2.
is inclined at 45 degrees with respect to the vertical plane of the disc grindstone (3), and insert the locking pin from the round hole (29) of the lateral movement plate (1) into the corresponding inclination angle determining hole (29). (Push in 30j and set 1b.) In this situation, slightly loosen the tightening screws (18) of the lateral movement mechanism (7) and slide the lateral movement plate (21) into the holder part (9). The part slightly inside the old cutting edge surface (2a) of the held mowing blade (2) is aligned with the vertical 1n of the disc grindstone (3).

After that, turn the end of the presser plate, push the pin into one of the holes for determining the direction of the cutting edge under the pin path of side piece 04, and firmly tighten the nut to securely hold the cutting blade (2). At the same time, firmly tighten the wing nut θQ to fix it to the support plate Gυ. Then, depending on the size of the required blade pattern, set the start and end of the cut by 1β with the stoppers f231 and t241, rotate the Ensaka whetstone (3), and turn the blade feed lever (12).
) and gradually send the vertical transfer wariuke & (14).

As a result, the positive disc grinding filter (3) or the mowing blade (2) is
The cutting edge L [Ij (2b) inclined at <45 degrees is cut by a predetermined distance. Next, press the holding plate ■ of the holder part (9)
Loosen the bottle □□□ from the blade edge orientation hole □□□ (4FJ) and attach the mowing blade (2) to the base plate example.
It is sufficient to rotate a little along with the end of the presser plate, push the pin into the two cutting edge orientation holes, firmly tighten the wing nut to fix it, and then feed it vertically in the same way as before. By repeating this process 8 times in sequence, new cutting surfaces (2b) are created at 8 locations at equal intervals near the outer periphery of the mowing blade (2), and with equal dimensions from the center and inclined at 45 degrees, as shown in Figure 9. is formed.

Then, a new flank surface (2d) is placed on the back of the previous cutting surface (2b).
), remove the butterfly nut and butterfly nut from the holder part (9) and the end of the presser plate, turn over the mowing blade (2), place the pressure plate (to) again, and place the butterfly nut (IJI) on the holder (9). )
Tighten. Next, slide the lateral moving plate (21) toward you in a direction in which the old flank (2C) of the mowing blade (2) matches the vertical plane of the disc grindstone (3) and fix it. In this state, turn the mowing blade (2) slightly to align the flank surface (2c) with the vertical surface of the disc grindstone (3), and then insert the pin into one of the blade edge orientation holes (b) at the end of the holding plate. Push in (g) and tighten the nut wire and wing nut 10. And as before,
By determining the cutting length with the stopper drive 4), and rotating the disc grindstone (3) and vertically feeding it with the lever (12), the cutting edge is cut from the back of one cutting surface (2b) to the next as shown in Figure 3. New flank (2d) towards the base of the cutting edge (2b)
is cut (see Figure 1O). Place this like the above 2
By sequentially repeating the process using the blade edge direction determining hole (A) and pin (7) for each pawl, eight relief curves (2d) are cut and an eight-blade mowing blade (2) is formed as shown in Fig. 11. ) is played.

In addition, as an example of use other than the above, the mowing blade (2) is tilted 30 degrees from the horizontal by the tilting mechanism (8) of the holding means (5), and the disc grindstone (3) is also tilted at the top of the lower part of its support arm (6). Between the bracket with the base t1+) (G), insert a locking pin (F) between the inner disc - 0 force round hole... and the inclination angle determining hole (G).
may be inserted, and the cutting surface (2b) may be cut at an angle of 15 degrees from the vertical. This cuts the 45-degree cutting edge (2b), but next, return the holder part (9) to a horizontal position, hold the mowing blade (2) inside out, and cut a new cutter (2d). For example, the mowing blade (2) having a slope of 15 degrees is also formed at the escape point (2d).

If the height position of the disc grindstone (3) of the cutting means (B) is variable as described above, the disc grindstone (3) may wear out when cutting with the mowing blade (2) tilted. Even when the diameter is small, the disc grindstone (3) can be placed at a low position to ensure proper cutting. If 16 holes (B) for determining the direction of the cutting edge of the presser plate (7) are formed as described above, in addition to the 16 blades, locking pins may be placed in every other hole (9) as described above. If you press it every time, you can cut 8 blades, and if you use it every 4th time, you can cut 4 blades. In the case of two blades, the cutting edge pattern is large, so a holding plate (2) or a support plate (2) as shown in FIG. 8 may be used. Further, the support plate and the presser plate (2) may be turned using a ratchet method instead of being turned by hand at intervals of the cutting edge direction determining holes.

Of course, it can be used to regenerate rotary blades for purposes other than mowing blades.

As is clear from the foregoing, the present invention enables the formation and sharpening of a cutting edge surface and the formation of a flank surface on a rotary blade such as a mowing blade that has been worn out due to use, by cutting with a disk grindstone.

Therefore, the present invention has the following effects.

Rotary blades such as 02 blades, 4 blades, and 8 blades can be divided into equal parts, and the dimensions from the center to the cutting edge can be made equal, and the inclination of each cutting blade surface can be regenerated into the same rotary blade. Conventionally, grinding was carried out using a wide grinder and by eye measurement and using a wheel, so it was only possible to produce pieces that were unevenly divided, dimensioned, and sloped. On the other hand, in the present invention, the holder part of the regenerated blade is provided with equally spaced blade edge orientation holes and pins that are sequentially pushed into the holes. Cutting position can be determined. Further, each cutting dimension is positioned using a vertical feed stopper, and the holder portion can be set to a desired inclination angle using an inclination angle determining hole and a pin. Therefore, the regenerated blade can cut the cutting edge and flank of the same size at evenly spaced positions, and the cutting surfaces of the same slope can be cut on each of the surrounding edges, and an accurate and uniform rotating blade can be regenerated. It is possible.

◎Rotary blades can be regenerated in a short time without changing quality. Conventionally, grinding was done using a grinder, so it took time to grind each part of the recycle pot, and the resulting heat often resulted in quenching or annealing of the chips on the blade surface.

However, with the present invention, by cutting with a thin disk-shaped cutter, it is possible to simultaneously perform 9 grooves to form each moon at equal intervals and to cut each cutting edge surface, and then cut the flank surface. Only. Therefore, the rotary blade can be regenerated in a much shorter time than conventional methods, and unlike conventional methods, there is no need for hardening or annealing of the cutting edge surface during regeneration work, resulting in high quality. You can play it as is.

θ Anyone can easily regenerate the rotary blade. Grinding using a conventional grinder is difficult and dangerous for elderly people and women. In contrast, in the present invention, the blade to be regenerated is held by a holder and the vertical feed lever is moved to the stop position by a stopper, so the operation is not dangerous and can be handled by anyone.

@By having the above effect, the old rotary blades that have been accumulated in each house can be regenerated accurately and easily, so unlike in the past, there is no need to purchase new blades as soon as they become old, and it is also economical. It is excellent.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a front view, Fig. 2 is a right side view when forming the cutting edge surface, Fig. 3 is a plan view when forming the flank surface, and Fig. 4 ( A) is a side view of the horizontally movable plate, (B) is its front view, and Figure 5 (A) is a side view of the rotatable plate.
(B) is its front view, Figure 6 is a partially longitudinal exploded front view of the holder part, Figure 7 is a side view of the bracket of the cutting means, and Figure 8
The figure is a plan view of another holding plate, Figure 9 (a) is a plan view of the regenerated blade when the cutting edge surface is formed, (b) is its front view, and Figure 10 is the regenerated blade when the flank surface is formed. Figure @11 is a plan view of the regenerated blade after the cutting. Drawing code (A)... Holding means, [F])... Cutting means, (1)... Base, (2)... Recycled blade, (3)
... Disc grindstone, (6) ... Vertical feed mechanism, (7) ...
・Lateral movement mechanism, (8)...Tilt mechanism, (9)...Holder part, [24)...Stopper, □□□...Rotating plate, Deer...Short axis, I2 (F)...Inclination angle determining hole, (3o)...Pin, (2)...Support plate, (G)...
・・Holding plate, (b) ・hole for determining the direction of the cutting edge, (c)・
...Pin, (6)...Support arm, (Foundation)...Short shaft, -...Glugt, -1...Glugt, (G)
...Hole for determining the inclination angle, 191...Short axis, glue...
pin. Applicant Hara 1) Toku Kyoei Figure 2 Figure 4

Claims (1)

[Claims] ■ A holding means (2) and a cutting means [F]) for the regenerated blade (2) are provided on the base +1+ in a facing manner, and the holding means (A
) is a pongee feeding mechanism (6) capable of traversing feeding to the cutting means (B) and having at least a stopper (24) for positioning at the end of feeding, and a horizontal moving machine 41% capable of sliding in a direction perpendicular to vertical feeding. (7), and several rotatable plates (26) pivoted on the short axis (27) in the same direction as the vertical feed on the horizontally shifting maple structure (7) are formed near the periphery to determine the inclination angle. A tilting mechanism (8) that fixes by pushing the locking pin (30) into one of the holes
), a support plate ■ which holds the regenerated blade (2) on the rotatable plate 12tij, and a presser plate (7) are rotatably supported, and two pieces are attached near the periphery of one plate (G). Hole c for determining the direction of the cutting edge formed above
The cutting means Q3) is equipped with a holder part (9) into which a locking pin can be pushed into one of the two plates, and a holder part (9) in which both plates can be tightened and fixed. ) can be rotated in the vertical direction.
K-blade sharpening device. ■In the full-cut powerless sharpening device for regenerating rotary blades according to claim 1, the cutting means Cl5) is moved between the lower part of the supporting arm and the base (1) at a right angle to the vertical feed. The height position of the rotary whetstone (3) can be adjusted by supporting it with a short shaft in the same direction as the vertical feed.
Pivotally support it with II 9), and attach it to either the tilt # + angular hole - formed in several pieces near the part of one bracket 161.
A self-cutting device for rotary blade regeneration, in which a locking pin (5υ) is inserted and fixed from the other bracket side.