JP2011010631A - Agricultural implement and blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for suppressing clogging of the object of removal in a narrow part of a notch provided in a blade.SOLUTION: The agricultural implement 1 includes: a platy blade 2, a rod-like handle 3; and a connecting part 4 for connecting and fixing the blade 2 and handle 3. The blade 2 has a blade tip 21 on the tip side thereof. The blade tip 21 has outer edges 23 extending from the tip 211 thereof toward the base end side of the blade 2 on both sides so as to gradually enlarge the transverse width of the blade tip 21. The outer edges 23 are worked sharply so that the thickness of the blade 2 is gradually decreased toward the outside of the blade tip 21. Furthermore, the blade tip 21 is provided with a notched part 25 notched so as to gradually enlarge the interval of a gap in the transverse direction from the tip 211 thereof toward the base end side of the blade 2.

Description

  The present invention relates to a blade for agricultural tools, and more particularly to the shape of the blade.

  When plowing fields, weeds and other vegetation must be removed. So far, blades for agricultural tools have been proposed for efficiently removing foreign substances (removal objects) such as underground vegetation.

  For example, Patent Document 1 discloses a blade provided with a notch having a predetermined shape. Specifically, a V-shaped notch in which the gap is gradually narrowed from the blade edge is provided, and a wide notch is further provided in the back of the narrow part of the gap.

  According to such a blade, the root of the grass that has entered the V-shaped notch is caught by a narrow portion, so that the grass can be easily extracted from the ground. Furthermore, when another grass enters the V-shaped notch, the grass caught in the narrow portion is pushed out to the notch in the back, and sequentially comes out from the notch in the back.

JP-A-6-189601

  However, when many grasses are densely packed, the blades of the above-described blades are open in a V shape, so that a large amount of grass enters a narrow part of the notch at a time. For this reason, grass is easily clogged in a narrow part of the notch. Once the grass is clogged, it is necessary to separately extract the grass, so that the work efficiency becomes very poor.

  This invention is made | formed in view of the said subject, and it aims at providing the technique which suppresses that a removal target object is blocked in the narrow part of the notch provided in the blade.

  In order to solve the above-described problem, a first aspect is a farm tool including a plate-like blade and a handle attached to the blade, and the blade has a blade edge portion on a tip side thereof, and the blade edge The portion has outer edge portions extending on both sides from the distal end portion toward the proximal end side of the blade so that the lateral width of the blade edge portion gradually increases, and the gap from the distal end portion toward the proximal end side. A notch portion is provided so as to gradually increase the interval.

  Moreover, the 2nd aspect is processed sharply so that thickness may become thin gradually as the said outer edge part goes to the outer side of the said blade-tip part in the agricultural implement which concerns on a 1st aspect.

  Moreover, the 3rd aspect WHEREIN: In the agricultural implement which concerns on a 1st or 2nd aspect, the space | interval of the clearance gap of the said notch part in the said front-end | tip part is 2 mm or more and 3 mm or less.

  According to a fourth aspect, in the agricultural implement according to any one of the first to third aspects, a plurality of the blade edge portions are provided on the tip side of the blade.

  Further, the fifth aspect is a plate-like blade for an agricultural tool to which a handle is attached, and the blade has a blade edge portion on a tip side thereof, and the blade edge portion is formed from the tip portion of the blade base. The outer edge portion extending so that the lateral width of the cutting edge portion gradually increases toward the end side is cut out so that the gap interval gradually increases from the distal end portion toward the proximal end side. A notch is provided.

  In addition, according to a sixth aspect, in the blade according to the fifth aspect, the outer edge portion is sharply processed so that the thickness gradually becomes thinner toward the outside of the blade edge portion.

  According to the agricultural implement which concerns on a 1st aspect, since the outer edge part of a blade edge part spreads gradually from a front-end | tip part, it makes a removal target object approach to a front-end | tip part, pushing away an excess removal target object along an outer edge part. Can do. Since the amount of the removal target entering the notch can be appropriately limited, it is possible to suppress the removal target from being clogged in a narrow portion of the notch.

  Moreover, according to the agricultural implement which concerns on a 2nd aspect, since the outer edge part is processed sharply, it becomes easy for a blade edge part to approach the ground, and it becomes easy to cut | disconnect removal objects, such as a plant, by an outer edge part. .

  Moreover, according to the agricultural implement which concerns on a 3rd aspect, a single vegetation can be effectively caught by the front-end | tip part by matching the space | interval of the clearance gap of a front-end | tip part with the diameter of the root and stem of a general plant.

  Moreover, according to the agricultural implement which concerns on a 4th aspect, since it has a some blade edge | tip part at the front-end | tip side of a blade, a removal target object can be hooked in a some front-end | tip part at once.

  Further, according to the blade according to the fifth aspect, since the outer edge portion of the blade edge portion gradually spreads from the tip portion, the removal target object enters the tip portion while pushing away the extra removal object along the outer edge portion. Can be made. Since the amount of the removal object that enters the notch can be limited, it is possible to suppress the removal object from being clogged in a narrow part of the notch.

  Further, according to the blade according to the sixth aspect, since the outer edge portion of the blade edge portion is sharply processed, the blade edge portion easily enters the ground, and the removal object such as a plant or the like is cut at the outer edge portion. It becomes easy to do.

It is a perspective view which shows the agricultural tool which concerns on 1st Embodiment. It is a figure for demonstrating the effect | action of the outer edge part of the agricultural implement shown in FIG. It is a perspective view which shows the agricultural tool which concerns on 2nd Embodiment. It is an enlarged view which expands and shows the blade edge | tip part of the agricultural implement shown in FIG. It is a perspective view which shows the agricultural tool which concerns on 3rd Embodiment. It is a front view which shows the agricultural tool which concerns on 4th Embodiment.

  Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

<1. First Embodiment>
FIG. 1 is a perspective view showing a farm tool 1 according to the first embodiment. The farm tool 1 is a hand-operated cocoon used for various operations such as cultivation, middle cultivation, weeding, and cultivation. The farm tool 1 includes a flat blade 2, a rod-shaped handle 3 serving as a gripping portion, and a connecting portion 4 that connects the blade 2 and the handle 3.

  One of the connecting portions 4 is fixed at a predetermined position biased toward the base end side of the blade 2, and has an insertion hole for inserting the handle 3 on the other side. By inserting and fixing the handle 3 into the insertion hole, the blade 2 and the handle 3 are fixed at an acute angle. When the operator uses the farm tool 1, the handle 3 is grasped, the tip side of the blade 2 is swung down on the ground, and the blade 2 is further moved forward.

  The blade 2 has a blade edge portion 21 on its tip side. The blade edge portion 21 is directed from the distal end portion 211 toward the proximal end side of the blade 2 in the lateral direction of the blade edge portion 21 (direction (lateral direction) orthogonal to the direction from the proximal end side of the blade 2 toward the distal end side (vertical direction)). The outer edge portion 23 is extended on both sides so as to gradually increase in width.

  The outer edge portion 23 is sharply processed so that the thickness of the blade 2 becomes gradually thinner toward the outside of the blade edge portion 21 (that is, toward the end of the blade edge portion 21). This facilitates cutting the vegetation at the outer edge 23. Further, as described above, the outer edge portion 23 extends so as to be inclined with respect to the vertical direction. Therefore, for example, it is possible to design the blade 2 so that it can be digged while suppressing the resistance to about 1/3 as compared with the case where the shape of the blade is substantially rectangular.

  The blade tip portion 21 is provided with a cutout portion 25 that is cut away from the tip end portion 211 toward the proximal end side of the blade 2 so that the interval between the lateral gaps gradually increases. The gap of the notch 25 is the narrowest at the distal end portion 211, is the widest at the back of the most proximal side of the blade 2, and changes so that the gap interval increases continuously.

  By providing such a notch 25, when the operator swings down the farm tool 1, grass roots and stems are caught on the tip portion 211. Then, the plants caught on the tip portion 211 are sequentially pushed out toward the back with a wider gap as another plant enters the tip portion 211. As a result, the vegetation caught on the tip portion 211 is easily removed from the cutout portion 25.

  In addition, the blade 2 can be reduced in weight by providing the notch portion 25 in the blade 2, and even if soil lump is placed on the entire surface of the blade 2 during work, the contact surface with the soil is small, You can easily get it down.

  In addition, the space | interval of the clearance gap of the notch part 25 in the front-end | tip part 211 becomes like this. Preferably they are 1 mm or more and 10 mm or less, More preferably, they are 1 mm or more and 5 mm or less, More preferably, they are 2 mm or more and 3 mm or less. In this way, by adjusting the gap interval to the diameter of the roots and stems of general vegetation, a single vegetation can be captured more reliably at the tip portion 211. However, the design of the gap of the tip portion 211 can be changed as appropriate according to the size of the object to be removed.

  FIG. 2 is a view for explaining the operation of the outer edge portion 23 of the farm tool 1 shown in FIG. Here, a case where grass roots are hooked and removed by the tip portion 211 will be described as an example. In FIG. 2, grass roots r <b> 1 and r <b> 2 are shown in a sectional view for convenience of illustration.

  When the operator swings down the farm tool 1 and inserts the tip side of the blade 2 into the ground, among the roots of the grass in the ground, the grass root on the moving path of the tip portion 211 enters the tip portion 211. Then, a grass root r <b> 1 that is the same as or slightly thicker than the gap of the tip portion 211 is caught on the tip 21.

  On the other hand, the grass root r2 outside the moving path of the tip portion 211 is pushed away to the side of the blade edge portion 21 along the outer edge portions 23 on both sides. This is because the outer edge portions 23 on both sides extend so that the lateral width of the blade edge portion 211 gradually increases. Further, since the root r2 is pushed away by the sharply processed outer edge portion 23, the root r2 can be shaved and damaged. Therefore, it becomes easy to remove the grass of the root r2.

  Thus, according to the farm tool 1, the root r2 of the grass on the moving path of the tip portion 211 can be caused to enter the tip portion 211 while the root r2 outside the moving path of the tip portion 211 is released to the side. Therefore, even if many vegetation are densely packed, the amount of vegetation entering the tip of the notch 25 can be appropriately limited, so that the tip portion 211 can be prevented from being clogged. Thereby, work can be performed efficiently.

  In addition, even if the vegetation is narrower than the gap between the tip portions 211, the vegetation can be removed if it entangles with the blade edge portion 21. Further, a plant having roots and stems that are much thicker than the gap between the tip portions 211 can be pushed away to the side without entering the tip portion 211.

  In addition to plants and the like, stones larger than the gap between the tip portions 211 can also be pushed sideways along the outer edge portion 23. Therefore, it is possible to suppress clogging of the tip portion 211 with stones and the like. Thus, even if there is a stone, the ground can be easily dug.

<2. Second Embodiment>
FIG. 3 is a perspective view showing a farm tool 1a according to the second embodiment. In the description of the present embodiment, elements having the same functions as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. The same applies to the following embodiments.

  The farm tool 1a includes a substantially semi-elliptical flat blade 2a, a rod-shaped handle 3a, and a connecting portion 4a that connects the blade 2a and the handle 3a. The farm tool 1a is suitable for cutting vegetation growing on the ground surface. The blade 2a has a plurality of blade tip portions 21a on the tip side.

  FIG. 4 is an enlarged view showing the cutting edge portion 21a of the farm tool 1a shown in FIG. 3 in an enlarged manner. As with the blade edge portion 21 shown in FIG. 1, the blade edge portion 21a has outer edge portions 23a extending on both sides so that the lateral width of the blade edge portion 21a gradually increases from the distal end portion 211a toward the proximal end side of the blade 2a. ing.

  Similarly to the outer edge portion 23, the outer edge portion 23 a is sharply processed so that the thickness of the blade 2 gradually becomes thinner toward the outside of the blade edge portion 21 a. For this reason, since the blade edge part 21b is easy to cut | disconnect a plant, weeding work can be performed efficiently.

  Further, the blade edge portion 21a is provided with a cutout portion 25a that is cut away from the distal end portion 211a toward the proximal end side of the blade 2 so that the gap in the lateral direction gradually increases. The gap of the notch 25a is the narrowest at the distal end portion 211a, and is the deepest at the backmost side on the proximal end side of the blade 2a.

  In such a farm tool 1a as well as the farm tool 1 of the above-described embodiment, excess plants are pushed away sideways along the outer edge portion 23a, so that the tip portion 211a can be prevented from being clogged with plants.

  Further, since a plurality of cutting edge portions 21a are provided on the tip end side of the blade 2a, it is possible to hang plants with a plurality of tip portions 211a at a time. Therefore, weeding work can be performed efficiently.

<3. Third Embodiment>
FIG. 5 is a perspective view showing a farm tool 1b according to the third embodiment. The farm tool 1b includes a substantially rectangular and flat blade 2b, a rod-shaped handle 3b, and a connecting portion 4b that connects the blade 2b and the handle 3b. The farm tool 1b is suitable for digging up soil for cropping, for example.

  As with the blade 2a shown in FIG. 3, the blade 2b has a plurality of blade tip portions 21b on the tip side. The blade edge portion 21b has outer edge portions 23b on both sides extending from the distal end portion 211b toward the proximal end side of the blade 2 so that the lateral width of the blade edge portion 21b gradually increases.

  Similarly to the outer edge portion 23a, the outer edge portion 23b is sharply processed so that the thickness of the blade 2b gradually decreases toward the outside of the blade edge portion 23b. For this reason, it is easy for the cutting edge 21b to enter the ground and to cut the vegetation.

  Similarly to the blade edge portion 21a, the blade edge portion 21b has a cutout portion 25b that is cut away from the distal end portion 211b toward the proximal end side of the blade 2b so that the gap in the lateral direction gradually increases. Is provided. The gap between the notches 25b is the narrowest at the distal end portion 211b and the widest at the farthest side on the proximal end side of the blade 2b.

  Even in such a farming tool 1b, as with the farming tools 1 and 1a of the above-described embodiment, it is possible to prevent the tip portion 211b from being clogged with vegetation, so that the vegetation removal work can be performed efficiently.

<4. Fourth Embodiment>
FIG. 6 is a front view showing a farm tool 1c according to the fourth embodiment. The farm tool 1c includes a plate-shaped blade 2c, a rod-shaped handle 3c, and a connecting portion 4c that connects the blade 2c and the handle 3c. When an operator uses the farm tool 1c, the tip side of the blade 2c is pushed into the ground with the help of hands or feet, and the blade 2c is returned in a predetermined direction to dig up the soil.

  In addition, the connection part 4c has connected the base end side of the blade 2c, and the edge part of the handle | pattern 3c, and is fixing so that these members may be located in a substantially straight line. However, the connecting portion 4c connects the angle formed by the blade 2c and the handle 3c (more specifically, the imaginary line connecting the grip portion of the handle 3c and the connecting portion 4c, and the cutting edge of the blade 2c and the connecting portion 4c. These members may be connected so that the angle formed by the imaginary line is 90 ° or more and 180 ° or less.

  The blade 2c has a plurality (two in this case) of blade tips 21c on the tip side, like the blade 2a shown in FIG. The blade edge portion 21c has outer edge portions 23c on both sides extending from the distal end portion 211c toward the proximal end side of the blade 2c so that the lateral width of the blade edge portion 21c gradually increases.

  The outer edge portion 23c is sharply machined so that the thickness of the blade 2c becomes gradually thinner toward the outside of the blade edge portion 21c, like the outer edge portion 23a. Therefore, it is easy for the blade edge portion 21c to enter the ground and to cut the vegetation.

  Further, similarly to the blade edge portion 21a, the blade edge portion 21c has a cutout portion 25c that is notched so that the distance between the lateral gaps gradually increases from the distal end portion 211c toward the proximal end side of the blade 2c. Is provided. The gap between the cutout portions 25c is the narrowest at the distal end portion 211c, and is widest at the deepest position on the proximal end side of the blade 2c.

  In such a farm tool 1c as well, in the same way as in the above-described embodiment, it is possible to prevent the tip portion 211c from being clogged with vegetation, so that the vegetation removal operation can be performed efficiently.

<5. Modification>
Although the embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications can be made.

  For example, in the said embodiment, although the flat blade is used, the shape of a blade is not restricted to such a thing. For example, the outer edges 23, 23a, 23b, and 23c may be bent inward to curve the entire blade. Further, only the blade edge portion may be curved.

  Moreover, in the said embodiment, although the outer edge part was extended so that the horizontal width of a blade edge | tip part may become large continuously, you may make it change the horizontal width of a blade edge | tip part in steps. Similarly, the gap between the notches may be changed stepwise.

  Moreover, in the said embodiment, although the pattern demonstrated as a rod-shaped thing extended linearly, the pattern may also contain the part extended in a curvilinear form.

  Moreover, in the said embodiment, although the blade and handle | steering_tool of an agricultural tool are comprised by another member, these may be formed integrally.

  Moreover, each element demonstrated by the said embodiment and modification can be combined suitably, unless inconsistency arises.

1,1a, 1b, 1c Agricultural tool 2,2a, 2b, 2c Blade 21,21a, 21b, 21c Blade tip 211, 211a, 211b, 211c Tip portion 23, 23a, 23b, 23c Outer edge 25, 25a, 25b, 25c Notch 3, 3a, 3b, 3c Handle 4, 4a, 4b, 4c Connecting part r1, r2 Root

Claims (6)

A farm tool comprising a plate-like blade and a handle attached to the blade,
The blade has a cutting edge on the tip side thereof,
The cutting edge portion is
From the tip portion toward the base end side of the blade, it has outer edge portions extending on both sides so that the lateral width of the blade tip portion gradually increases, and the gap is spaced from the tip portion toward the base end side. A farming tool with a notch that is cut out so that it grows gradually. The agricultural implement according to claim 1,
A farm tool that is sharply processed so that the outer edge portion gradually becomes thinner as it goes to the outside of the cutting edge portion. In the agricultural implement according to claim 1 or 2,
An agricultural implement in which a gap between the notches at the tip portion is 2 mm or more and 3 mm or less. The agricultural implement according to any one of claims 1 to 3,
A farm tool in which a plurality of the blade edge portions are provided on the tip side of the blade. A plate-like blade for farm tools to which a handle is attached,
The blade has a cutting edge on the tip side thereof,
The cutting edge portion is
From the tip portion toward the base end side of the blade, it has outer edge portions extending on both sides so that the lateral width of the blade tip portion gradually increases, and the gap is spaced from the tip portion toward the base end side. A blade provided with a cutout portion that is cut out so as to increase gradually. The blade according to claim 5,
A blade that is sharply processed so that the outer edge portion gradually becomes thinner as it goes to the outside of the blade edge portion.

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