JP6594214B2 - Rotary blade polishing equipment - Google Patents

Description

  The present invention relates to a polishing apparatus used when polishing a cutting edge of a rotary blade provided in a brush cutter used for removing vegetation and the like.

  Conventionally, when the cutting edge of a rotary blade attached to a brush cutter becomes worn or chipped due to use, it is difficult to remove vegetation or the like, and the rotary blade is removed from the brush cutter and replaced with a new rotary blade. Work was being done.

  However, if the rotary blade is simply worn out, it becomes economically preferable compared to replacing it with a new rotary blade because it becomes a sharp edge again by polishing the blade edge, and plants and the like can be removed. .

  For example, in Patent Document 1, a central convex portion 211 on the back side of the rotary cutter 21 that is still attached to the mower 2 is mounted, and the base 11 that supports the rotary cutter 21 so as to be movable back and forth while keeping the rotary cutter 21 in a horizontal posture, Disclosed is a rotary cutter grinding apparatus 1 including a grinding surface 12 that is a circular arc-shaped peripheral surface that is curved in the left-right direction following the outer peripheral edge of the rotary cutter 21 with the forward direction of the cutter 21 as the center. Yes. In addition, the code | symbol of each structural member is the code | symbol currently disclosed by patent document 1. FIG.

Japanese Patent Laying-Open No. 2015-80825

  However, in the rotary cutter grinding device described in Patent Document 1, it is necessary to provide a base on which the mower is placed in order to determine the relative positional relationship between the rotary cutter and the grinding surface, and therefore the size of the device itself is large. There is a problem that it is difficult to carry and the cost for manufacturing the device is high.

  When the mower is placed on the base and the rotary cutter is pressed against the grinding surface, it is necessary to adjust the force level, and it is necessary to get used to some extent. Specifically, if the force that presses the rotating cutter against the grinding surface is weak, the cutting edge cannot be sufficiently polished, while if the force that presses the rotating cutter against the grinding surface is strong, the cutting edge of the rotating cutter contacts the grinding surface. In addition to being bounced back and not being able to polish sufficiently, there is a risk of harming the user or those around him.

  Furthermore, if the curvature of the curve connecting the cutting edges of the rotating cutter and the curvature of the grinding surface are approximately equal, the cutting edge of the rotating cutter can be abutted over the entire grinding surface to polish the cutting edge. If there is a large difference between the curvature of the curve connecting the two and the curvature of the grinding surface, there is also a problem that the working efficiency of polishing is poor because the grinding surface comes into contact with only one or two points of the cutting edge of the rotary cutter.

  Therefore, the present invention is a polishing apparatus used when polishing the cutting edge of a rotary blade provided in a brush cutter used for removing vegetation and the like, with the rotary blade attached to the brush cutter. The blade edge of the rotary blade can be polished, and by reducing the number of components, the weight can be reduced, the size can be reduced, and the cost can be reduced. An object of the present invention is to provide a polishing apparatus capable of reliably polishing even a rotary blade having various curvatures, which can be used safely and reliably without being necessary.

[1] That is, the present invention is a plate-like polishing part having a curved part attached with an abrasive and curved in an arc shape, a side part bent from at least one circumferential end of the curved part, A rotary blade polishing apparatus comprising a first support portion and a second support portion fixed to both ends in a longitudinal direction of a polishing portion.
[2] The rotating blade polishing apparatus according to [1], further including an overhanging portion provided to overhang each of the first support portion and the second support portion.
[3] And the first support part and the second support part are integrated by contact or indirect contact via a connecting part. 2].
[4] Any one of [1] to [3], wherein the polishing section and the first support section, and the polishing section and the second support section are detachably fixed. A rotary blade polishing apparatus according to claim 1.
[5] The rotary blade polishing apparatus according to [2], wherein the protruding portion includes a through hole.

According to the rotary blade polishing apparatus described in [1], the cutting edge of the rotary blade can be polished in a state where the rotary blade is mounted on the brush cutter, and the weight and size can be reduced by reducing the number of components. It can be reduced in cost, and can be used safely and reliably without being nervous about the force of pressing the cutting edge of the rotary blade against the part to be polished. For rotary blades with various curvatures However, it can be reliably polished.
According to the rotary blade polishing apparatus described in [2] above, the stability of the rotary blade polishing apparatus itself is increased such that the rotary blade polishing apparatus itself is difficult to move when the rotary blade polishing apparatus is placed on the ground or the like. Can be steadily polished.
According to the rotary blade polishing apparatus described in [3] above, the stability is further increased such that the rotary blade polishing apparatus itself is difficult to move when the cutting edge of the rotary blade is pressed against the polishing portion of the rotary blade polishing apparatus. The blade edge of the rotary blade can be steadily polished.
According to the rotary blade polishing apparatus described in [4] above, when the abrasive attached to the polishing unit is reduced, it can be replaced with a new polishing unit and the rotary blade polishing apparatus can be used continuously. .
According to the rotary blade polishing apparatus described in [5] above, since the rotary blade polishing apparatus itself does not move by driving the pile through the through hole into the ground, the blade edge of the rotary blade is reliably polished. be able to.

It is a perspective view which shows 1st embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a top view which shows 1st embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a front view which shows 1st embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a front view which shows the base in 1st embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a perspective view which shows 2nd embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a top view which shows 2nd embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a front view which shows 2nd embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a perspective view which shows 3rd embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a top view which shows 3rd embodiment of the rotary blade grinding | polishing apparatus of this invention. It is a front view which shows 3rd embodiment of the rotary blade grinding | polishing apparatus of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a rotary blade polishing apparatus according to the present invention will be described in detail with reference to the drawings. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms. Moreover, the description showing a numerical range includes an upper limit and a lower limit.

<First embodiment>
As shown in FIGS. 1 to 4, the rotary blade polishing apparatus includes a polishing unit 1 that comes into contact with the cutting edge of the rotary blade 3 and a base 2 that fixes the polishing unit 1. Then, the rotary blade polishing apparatus is fixed to the ground, or the rotary blade polishing apparatus is not moved by pressing the back surface of the rotary blade polishing apparatus against a step or a wall, and the rotary blade 3 is attached to the brush cutter. In this state, the rotary blade 3 is rotated and the cutting edge of the rotary blade 3 can be pressed against the polishing unit 1 for polishing.

  The polishing portion 1 is a plate-like member that includes a curved portion 11 to which an abrasive 14 is attached and is curved in an arc shape, and a side portion 12 that is bent from at least one end of the curved portion 11. In the present embodiment, the bending portion 11 attached with the abrasive 14 and curved in an arc shape, the side portion 12 provided by bending both ends of the bending portion 11, and the fixing portion 13 provided by bending from both side portions 12 are provided. It is an elongated plate-like member provided.

  The bending portion 11 is bent so as to substantially follow a curve connecting a plurality of cutting edges of the rotary blade 3, and the curvature radius of the bending portion 11 is preferably 130 to 180 mm. When the radius of curvature of the curved portion 11 is in the above range, it can be used for most of the rotary blades 3 of commercially available brush cutters. In this embodiment, the curvature radius of the curved portion 11 is 155 mm, but can be changed within the above range in other embodiments.

  The side portion 12 is a member that is bent at a predetermined angle from one end of the bending portion 11, and the angle α formed by the bending portion 11 and the side portion 12 is bent at a right angle or an obtuse angle. Is preferred. When the angle α formed by the curved portion 11 and the side portion 12 forms a right angle or an obtuse angle, when the cutting edge of the rotary blade 3 attached to the brush cutter is pressed against the curved portion 11, the side portion from the curved portion 11 is Since the portion reaching 12 is easily bent to the back side, the plurality of cutting edges of the rotary blade 3 and the curved portion 11 are more likely to come into contact with each other, and the force between the cutting edge of the rotary blade 3 and the curved portion 11 is moderate. Therefore, the cutting edge of the rotary blade 3 can be efficiently polished. In this embodiment, the angle α formed by the curved portion 11 and the side portion 12 is 120 degrees, but in other embodiments, the angle α can be changed within the above range, that is, an angle of 90 degrees or more and less than 180 degrees. Further, in the present embodiment, the side portion 12 is provided at two positions on both ends of the bending portion 11. However, in another embodiment, the side portion 12 can be provided at only one end of the bending portion 11 at one location.

  The fixing portion 13 is a member that is bent from the end portion of the side portion 12 opposite to the bending portion 11 side and is fixed to the first support portion 21 or the second support portion 22. In the present embodiment, the fixing portion 13 is provided. However, in other embodiments, the end portion of the side portion 12 opposite to the curved portion 11 side is not welded or bonded without providing the fixing portion 13. It can be fixed directly to the first support portion 21 or the second support portion 22 by a method. In another embodiment, when the side portion 12 is provided at only one end of the bending portion 11, the other end of the bending portion 11 not having the side portion 12 is directly connected to the first support portion 21 or the second support portion. 22 can be fixed.

  Although not shown in the drawing, the fixing portion 13 is formed with a circular screw hole through which the male screw portion of the bolt B passes, and the polishing portion 1 and the base portion 2 are removed by removing the bolt B and the nut N. Can be easily attached and detached. In addition, as a fixing means for fixing the fixing portion 13 of the polishing portion 1 and the first support portion 21 or the second support portion 22 of the base portion 2, the fixing portion 13 is not limited to a screw including a bolt B and a nut N. The protrusions provided on the first support portion 21 or the second support portion 22 and the insertion portion can be fitted and fixed, and the fixing portion 13 and the first support portion 21 or the second support portion 22 are neodymium. It can also be fixed by being sandwiched between magnets such as magnets.

  In the present embodiment, the bending portion 11, the side portion 12, and the fixing portion 13 are formed by bending a single thin plate member, but in other embodiments, individual parts are welded or It can also be formed by joining by a method such as adhesion.

  In addition, the material of at least the curved portion 11 and the side portion 12 in the polishing portion 1 is deformed when a force is applied, such as a metal such as stainless steel or cast iron, or a polymer material such as engineering plastic. It is preferable to have the elastic property of returning the shape of When the bending portion 11 and the side portion 12 are made of an elastic material, when the cutting edge of the rotary blade 3 attached to the brush cutter is pressed against the bending portion 11, the portion from the bending portion 11 to the side portion 12 bends to the back side. By becoming easier, the plurality of cutting edges of the rotary blade 3 and the curved portion 11 are more likely to come into contact with each other, and the force that the cutting edge of the rotary blade 3 and the curved portion 11 are in contact is moderately relaxed, so that it is efficient. The cutting edge of the rotary blade 3 can be polished. For this reason, the cutting edge of the rotary blade 3 having various radii can be stably polished.

  The abrasive 14 attached to the bending portion 11 is attached to the surface of the bending portion 11 that comes into contact with the rotary blade 3, that is, the recessed surface, and is made of a material harder than the cutting edge of the rotary blade 3. It is configured. As the abrasive 14, specifically, diamond, cubic boron nitride, silicon carbide, aluminum oxide (III) or the like can be used, and these are sprayed on the curved portion 11 and applied by a method such as coating or adhesive. Furthermore, it fixes to the bending part 11 by adding heating processes, such as sintering. In the present embodiment, the abrasive 14 is attached over almost the entire surface of the curved portion 11 on the concave side, but in another embodiment, how the abrasive is applied to the concave surface of the curved portion 11. It can be variously changed whether 14 is attached.

  The base 2 is a member that supports the polishing unit 1 and includes at least a first support unit 21 and a second support unit 22 that are fixed to both ends in the longitudinal direction of the polishing unit 1. In the present embodiment, the plate-like first support portion 21 and the second support portion 22 that support the polishing portion 1 by contacting the fixed portions 13 located at both ends in the longitudinal direction of the polishing portion 1, and further, the first support portion 21 and the second support part 22 are provided with an overhang part 23 provided so as to protrude from the surface in contact with the fixed part 13 and the opposite surface. And the plate-shaped connection part 24 formed by bending only the predetermined angle between the 1st support part 21 and the 2nd support part 22 is also provided. In addition, in this embodiment, although the 1st support part 21 and the 2nd support part 22 are plate-shaped members, as long as the grinding | polishing part 1 can be supported in other embodiment, it can also be used as a rod-shaped member.

  The first support portion 21 and the second support portion 22 are members that are fixed to both ends in the longitudinal direction of the polishing portion 1 and support the polishing portion 1. In the present embodiment, the first support portion 21 and the second support portion 22 are rectangular plate members, and two types of short diameter fixings are provided along the longitudinal direction of the first support portion 21 and the second support portion 22. A long hole 25 and a long-diameter fixed long hole 26 are formed. Depending on the size of the polishing portion 1, the short diameter fixed long hole 25 or the long diameter fixed long hole 26 can be used for fixing by a fixing means such as a bolt B and a nut N. In the present embodiment, there are two long holes to be fixed to the fixing portions 13 that are both ends in the longitudinal direction of the polishing portion 1, but in other embodiments, only one location or three or more locations may be used. Further, the short diameter fixed long hole 25 and the long diameter fixed long hole 26 are long holes along the longitudinal direction of the first support portion 21 and the second support portion 22, but in the polishing portion 1 compared to the round holes. This is preferable because the position of the polishing portion 1 can be easily adjusted in order to attach the bending portion 11 so as not to cause distortion.

  The overhang portion 23 is provided so as to overhang the first support portion 21 and the second support portion 22, respectively, and the first support portion 21 and the second support portion 22 are stably erected with respect to an installation place such as the ground. It is a member for making it. In the present embodiment, the overhang portion 23 is a plate-like member provided to overhang from the surface of the first support portion 21 and the second support portion 22 that are in contact with the fixed portion 13 and the opposite surface. In other embodiments, it may be a columnar or conical member, and a pile may be added to the surface that contacts the ground or the like so as to bite into the ground or the like. The first support portion 21 and the second support portion 22 may be provided so as to protrude from the surface in contact with the fixed portion 13.

  Further, the projecting portion 23 in the present embodiment is provided with a through hole 25 having a diameter of a predetermined size, and the present invention is driven by driving a pile through the through hole 25 in accordance with a place such as the ground. It is possible to securely fix the rotary blade polishing apparatus.

  The connecting portion 24 is a member that is bent between the first support portion 21 and the second support portion 22 by a predetermined angle, and is a member that fixes the first support portion 21 and the second support portion 22. is there. Further, by providing a plate-like connecting portion 24 between the first support portion 21 and the second support portion 22 as in the present embodiment, the back side of the connecting portion 24, that is, the polishing portion 1 in the connecting portion 24 is positioned. The surface opposite to the surface to be pressed is pressed against a step or a wall so that the rotary blade polishing apparatus does not move, and the rotary blade 3 is rotated while the rotary blade 3 is mounted on the brush cutter. Can be pressed against the polishing section 1 for polishing. In the present embodiment, the angle β formed by the connecting portion 24, the first support portion 21, and the second support portion 22 is 135 degrees, but can be variously changed in other embodiments.

  Moreover, in this embodiment, although the connection part 24 is provided, in other embodiment, the 1st support part 21 and the 2nd support part 22 are each independently used as a plate-shaped member without the connection part 24 being interposed. It may be provided. At this time, the first support portion 21 and the second support portion 22 are each provided with an overhang portion 23, and further, the through-hole 25 is provided in the overhang portion 23. It is preferable not to do so.

  In the present embodiment, the first support portion 21, the second support portion 22, and the connecting portion 24 are formed by bending a single elongated plate-like member. The parts can also be formed by joining them together by welding or bonding.

  In addition, the material of the first support portion 21, the second support portion 22, the overhang portion 23, and the connecting portion 24 in the base portion 2 is a metal such as stainless steel or cast iron so that the rotary blade polishing apparatus is difficult to move. It is preferable.

<Second embodiment>
As shown in FIGS. 5 to 7, the rotary blade polishing apparatus is configured in the same manner as in the first embodiment. However, the length in the longitudinal direction of the curved portion 11 in the polishing portion 1 is longer than that in the first embodiment. Since the angle α between the curved portion 11 and the side portion 12 is 110 degrees, the fixed portions 13 on both ends of the polishing portion 1 are respectively connected to the first support portion 21 and the second support portion 21. It is attached to the long-diameter fixed long hole 26 of the support portion 22. With these configurations, the same effects as in the first embodiment can be obtained.

<Third embodiment>
As shown in FIGS. 8 to 10, the rotary blade polishing apparatus is configured in the same manner as the first embodiment. However, the first support portion 21 and the second support portion 21 are not connected to the first embodiment via the connecting portion 25. Since the support portion 22 is different in that it is in direct contact, the rotary blade polishing apparatus can be fixed by pressing the first support portion 21 and the second support portion 22 against a step or a wall forming a corner. . With these configurations, the same effects as in the first embodiment can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Polishing part 11 ... Bending part 12 ... Side part 13 ... Fixed part 14 ... Abrasive agent 2 ... Base part 21 ... First support part 22 ... Second support Part 23 ... Overhang part 231 ... Through hole 24 ... Connection part 25 ... Fixed long hole 26 for short diameter ... Fixed long hole 3 for long diameter ... Rotary blade

Claims (5)

A plate-shaped polishing part having a curved part attached with an abrasive and curved in an arc, a side part provided by bending from at least one circumferential end of the curved part,
A rotary blade polishing apparatus comprising a first support portion and a second support portion fixed to both ends in the longitudinal direction of the polishing portion. The rotary blade polishing apparatus according to claim 1, further comprising an overhanging portion provided to protrude from each of the first support portion and the second support portion. 3. The rotary blade according to claim 1, wherein the first support portion and the second support portion are integrated in contact or directly through a connecting portion. Polishing equipment. The rotary blade polishing according to any one of claims 1 to 3, wherein the polishing portion and the first support portion, and the polishing portion and the second support portion are detachably fixed. apparatus. The rotary blade polishing apparatus according to claim 2, wherein the protruding portion includes a through hole.

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