JPH075317U - Cutting blade for brush cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding a cutting blade that is used by being attached to a brush cutter or a lawn mower, even if it comes into contact with a hard object, the blade part will not be damaged or deformed, nor will it be subjected to a large impact, and the durability will be high. Provide a cutting blade for a brush cutter having excellent sharpness. [Structure] A cutting blade for a bush cutter, characterized in that a large number of holes are formed at regular intervals on an outer peripheral surface of a cylindrical body, and a flexible metal element wire is embedded in the holes. . A cutting blade for a brush cutter, wherein a plurality of flexible metal wires are embedded in the hole. In addition, a cutting blade for a brush cutter, which has a truncated cone-shaped body. Furthermore, a cutting blade for a brush cutter that allows the replacement of metal wires. [Effect] While cutting grass, even if it comes into contact with a hard object, the blade will not be damaged or deformed, nor will it receive a large impact.
If there are plants and struts, they can be cut without damaging or cutting them, yet they are durable, have excellent sharpness, and can also cut a little hard bamboo or twigs.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting blade attached to a brush cutter or a mowing machine.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as cutting blades for brush cutters and the like, there are known cutting blades provided with saw blades on the entire outer peripheral portion thereof, and blades provided with a plurality of blades on the outer peripheral portion of the disc. Then, the saw blade-shaped disc or the disc blade was rotated, and grass was cut by a blade formed on the outer peripheral portion. On the other hand, in cord-type mowers, a bobbin with a cord wound around it or a disc with a cord attached is known. Then, by rotating the bobbin and the disc, the cord was rotated and the grass was cut.

[0003]

[Problems to be solved by the device]

 Since the conventional disk-type mower uses a highly rigid disk for the blade, if there are hard objects near the grass to be mowed, the blade will come into contact with them and damage the blade. It was deformed and a big shock was generated. In addition, if there are plants or struts, there was a problem that they would be damaged or cut. On the other hand, with a grass cutting blade using a plastic cord, only soft grass can be cut, the sharpness is poor, and the cord is severely worn.Therefore, it is necessary to frequently replace the cord or feed it from the bobbin during work. However, it had the drawback of poor work efficiency.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a number of holes formed at regular intervals on the outer peripheral surface of a cylindrical body, and a flexible metal wire is embedded in the holes. It is a feature. Further, it is characterized in that a large number of holes are bored at regular intervals on the outer peripheral surface of the cylindrical body, and a plurality of flexible metal wires are embedded in each hole. Also, it is characterized in that the shape of the body is frustoconical. Another feature is that the metal wires can be replaced.

[0005]

[Action]

 Since the cutting blade for the brush cutter according to the present invention is configured as described above, each metal wire constitutes a blade portion when the metal wire rotates to mow grass and harden stones. When this metal wire comes into contact with an object, the metal wire bends and escapes. In addition, since the body is also made of rubber or soft plastic, even if it comes in contact with a hard object such as a stone like a metal wire, it will return to its original shape after deformation due to its elasticity, and Less impact.

[0006]

【Example】

 The present invention will be described below with reference to the drawings showing an embodiment thereof. FIG. 1 shows a first embodiment of the present invention, in which a cylindrical body 1 is made of an elastic material such as rubber or soft plastic. A hollow shaft 3 for inserting the rotary shaft 9 of the brush cutter is inserted into the center of the body 1. The outer peripheral surface 4 of the body 1 is provided with a large number of holes 5 at regular intervals, such as a lattice, zigzag or rhombus, and metal wires 6 are embedded in the holes 5. Since the first embodiment is configured in this way, when cutting the grass, the body wire 1 embedded in the outer peripheral surface 4 of the body 1 becomes radial due to centrifugal force when the body 1 rotates via the rotary shaft 9. Rotate and move in the extended state to mow grass and the like. When the metal wire 6 comes into contact with a hard object such as stone or concrete, each metal wire 6 bends and rotates due to its elasticity. Further, even if the body 1 comes into contact with a hard object, since the body 1 is made of rubber or soft plastic, it returns to its original shape immediately after deformation due to its elasticity like the metal wire 6, and is cut. Less impact on the body and body. Reference numeral 10 is a safety cover attached for safety.

The interval between the holes 5 may be shortened along the direction from the root 7 to the tip 8 of the body 1. This is because the metal wire 6 embedded in the tip portion 8 comes into contact with more grass than the metal wire 6 embedded in the root portion 7 is more consumed and the metal wire 6 is cut. This is to prevent the reaping performance from being deteriorated even if some omission occurs because it is cut or dropped. Further, the length of the metal element wire 6 may be increased along the direction from the root portion 7 to the tip portion 8. This is also the same reason as above.

FIG. 2 shows a second embodiment, in which a plurality of metal element wires 6 are embedded in the hole 5. Since the tips of the metal wires 6 are disjointed, when this is rotated, a rotary blade having a narrower interval between the metal wires 6 than the cutting blade according to the first embodiment can be obtained. As a result, you can completely remove any grass, big or small.

FIG. 3 shows a third embodiment, in which a truncated cone-shaped body 2 is formed. The first and second embodiments are suitable for various uses such as flat portions, corners, rough lands or grooves, but the third embodiment is mainly suitable for use on flat ground. There is. Further, the upper and lower sides of the rotary shaft 9 may be attached.

FIG. 4 shows a fourth embodiment, in which the metal element wire 6 can be replaced. On the inner surface of the body 1 or the truncated cone-shaped body 2, a recess 11 is formed in the hole 5 into which the metal wire 6 is inserted, and the metal wire 6 is inserted from this recess 11 to form the base of the metal wire 6. The step 12 is fitted into the recess 11. After that, the hollow shaft 3 is detachably inserted into the body 1 or the truncated cone-shaped body 2. When replacing the metal element wire 6 which is damaged or the like, after pulling out the hollow shaft 3, the metal element wire 6 may be removed and a new metal element wire 6 may be inserted as described above. The first to third embodiments can be used for a longer period of time than conventional cutting blades, but the fourth embodiment uses a metal wire 6 that has been cut or dropped in the middle for further convenience. Each hole can be replaced.

[0011]

[Effect of device]

 As described above, in the present invention, the metal wire is embedded in the outer periphery of the cylindrical or truncated cone-shaped body, and the body and the metal wire have elasticity and flexibility. Even if the produced cutting blade comes into contact with a hard object, the cutting blade elastically deforms and bends, without scattering stones that have come into contact with it or damaging the hard object, without damaging the cutting blade itself. Can be used. Further, a cutting blade having a cylindrical body can be used for various purposes such as a flat surface portion, a corner portion, a rough land portion, or a groove portion, which is extremely convenient. Furthermore, compared with the blades made of nylon rope, which have a short life and are easily damaged, the blades according to the present invention are durable and have excellent sharpness, and can also cut a little hard bamboo or twigs. It is also economical because the metal wire can be replaced.

[Submission date] November 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial application] The present invention relates to a cutting blade to be attached to a brush cutter or a mowing machine.

[0002]

2. Description of the Related Art Conventionally, as cutting blades for brush cutters and the like, there are known cutting blades provided with saw blades on the entire outer peripheral portion of the disc, and those having a plurality of blades provided on the outer peripheral portion of the disc. There is. Then, the saw blade-shaped disc or the disc blade was rotated, and grass was cut by a blade formed on the outer peripheral portion. On the other hand, in cord-type mowers, a bobbin with a cord wound around it or a disc with a cord attached is known. Then, by rotating the bobbin and the disc, the cord was rotated and the grass was cut.

[0003]

[Problems to be Solved by the Invention] Since a conventional disc type mower uses a disc having a high hardness for the blade portion, when there is a hard object near the grass to be mowed, the blade portion should be attached to them. Came into contact with the blade and damaged or deformed the blade, and a large impact was generated. In addition, if there are plants and struts, there were problems such as damaging or cutting them. On the other hand, with a grass cutting blade using a plastic cord, only soft grass can be cut, the sharpness is poor, and the cord is severely worn.Therefore, it is necessary to frequently replace the cord or feed it from the bobbin during work. However, it had a drawback that the work efficiency was poor.

[0004]

In order to solve the above-mentioned problems, according to the present invention, a large number of holes are formed at regular intervals on the outer peripheral surface of a cylindrical body, and the holes are flexible. Disclosed is a cutting blade for a brush cutter, wherein one or a plurality of flexible metal wires are embedded. In addition, a large number of holes were formed at regular intervals on the end face of the cylindrical body, and one or more flexible metal wires were embedded in the holes. Also, the shape of the body is frustoconical. Also, the metal wire can be replaced.

[0005]

Since the cutting blade for the brush cutter according to the present invention is configured as described above, each metal wire constitutes a blade portion when the metal wire rotates to mow grass, stones, etc. When this metal wire comes into contact with a hard object, the metal wire bends and escapes. Also, since the body is made of rubber or soft plastic, even if it comes in contact with a hard object such as a stone like a metal wire, it will return to its original shape after being deformed due to its elasticity, and the body and body of the brush cutter will be restored. Less impact.

[0006]

Embodiment Hereinafter, the present invention will be described based on the drawings showing an embodiment thereof. FIG. 1 shows a first embodiment of the present invention, in which a cylindrical body 1 is made of an elastic material such as rubber or soft plastic. A hollow shaft 3 for inserting the rotary shaft 9 of the brush cutter is inserted in the center of the body 1. The outer peripheral surface 4 of the body 1 is provided with a large number of holes 5 at regular intervals, such as a lattice shape, a zigzag shape, or a rhombus shape, and metal wires 6 are embedded in the holes 5. Since the first embodiment is configured in this way, when cutting the grass, when the body 1 rotates via the rotary shaft 9, the metal wire 6 embedded in the outer peripheral surface 4 of the body 1 becomes radial due to centrifugal force. Rotate and move in the extended state to mow grass and the like. When the metal wire 6 comes into contact with a hard object such as stone or concrete, each metal wire 6 bends and rotates due to its elasticity. Further, even if the body 1 comes into contact with a hard object, since the body 1 is made of rubber or soft plastic, it returns to its original shape immediately after deformation due to its elasticity like the metal element wire 6, and is cut. Discharger Less impact on the body and body. Reference numeral 10 is a safety cover attached for safety.

The interval between the holes 5 may be shortened along the direction from the root portion 7 to the tip portion 8 of the body 1. This is because the metal wire 6 embedded in the tip portion 8 comes into contact with grass more than the metal wire 6 embedded in the root portion 7, so that the metal wire 6 is consumed much and many metal wire wires 6 are cut. This is to prevent the reaping performance from deteriorating even if some omission occurs because it is dropped or dropped. Further, the length of the metal element wire 6 may be increased along the direction from the root portion 7 to the tip end portion 8. This is the same reason as above.

FIG. 2 shows a hole 5 in which a plurality of metal element wires 6 are embedded in the first embodiment. In this case, the tip of the embedded metal element wire 6 is disjointed, so that when this is rotated, a rotary blade with a narrower interval between the metal element wires 6 than the cutting blade in which one is embedded is obtained. Because it cuts grass while crushing it, you can completely cut grass of any size.

FIG. 3 shows a second embodiment of the present invention, in which the cylindrical body 1 is made of an elastic material such as rubber or soft plastic. A hollow shaft 3 for inserting the rotary shaft 9 of the brush cutter is inserted into the center of the body 1. A large number of concentric holes 5 are formed in the end surface 13 of the body 1, and the metal wires 6 are embedded in the holes 5. Since the second embodiment is configured in this manner, when cutting the grass, the body 1 is rotated via the rotary shaft 9 and the tip of the metal wire 6 buried in the end surface 13 of the body 1 is slightly exposed. Rotate in the state of spreading and cut grass etc. into a disc shape. Then, when the metal wire 6 comes into contact with a hard object such as stone or concrete, each metal wire 6 bends due to elasticity and rotates. It should be noted that if the metal wire 6 is made long, grass in deep grooves or recesses can be easily cut.

FIG. 4 shows a third embodiment, in which a truncated cone-shaped body 2 is formed. The first and second embodiments are suitable for various uses such as flat portions, corners, rough lands or grooves, but the third embodiment is mainly suitable for use on flat ground. ing. The upper and lower sides of the rotary shaft 9 may be attached.

FIG. 5 is a partial sectional view of the fourth embodiment, in which the metal wire 61 can be replaced. A recess 11 is formed at the bottom of the hole 5 into which the metal wire 61 of the body 1 or the truncated cone body 2 is inserted. The metal element wire 61 is formed in a convex shape so that its root part fits into the recess 11. Although FIG. 5 shows an example in which one metal element wire is inserted, when a plurality of metal element wires are inserted into the hole 5, the shape of the convex portion 14 is reduced. From the surface side of the body 1 or the truncated cone-shaped body 2, the metal wire 61 is inserted into the hole 5 from the side of the convex portion 14, and the convex portion 14 formed at the root of the metal wire 61 is fitted into the concave portion 12. To do. The hollow shaft 3 is fitted in the body 1 or the truncated cone-shaped body 2. When replacing the metal element wire 61 such as breakage, the metal element wire 61 may be strongly pulled out by holding the tip thereof, and then a new metal element wire 61 may be inserted as described above. The first to third embodiments can be used for a longer period of time than the conventional cutting blades, but the fourth embodiment further cuts or drops the metal element wire for the sake of convenience. 6 can be replaced for each hole.

[0012]

As described above, in the present invention, the metal wire is embedded in the outer periphery of the cylindrical or truncated cone-shaped body, and the body and the metal wire are both elastic and flexible. Even if the cutting blade made of metal wire comes into contact with a hard object, the cutting blade elastically deforms and bends, scattering the contacted stones and damaging the hard object, and the cutting blade itself. Can be used without damage. Also, a cutting blade having a cylindrical body can be used for various purposes such as a flat surface, a corner, a rough land or a groove, which is extremely convenient. Moreover, compared with the blades made of nylon rope, which have a short lifespan and are easily damaged, the blades of the present invention are more durable and sharp, and they can cut a little hard bamboo or twigs. It is also economical because the metal wire can be replaced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a front sectional view showing a second embodiment of the present invention.

FIG. 3 is a front sectional view showing a third embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view illustrating a method of replacing a metal element wire according to a fourth embodiment of the present invention.

FIG. 5 is a side view showing a state in which the first embodiment of the present invention is attached to a brush cutter.

[Explanation of symbols]

 1 Body 2 Frustroconical Body 3 Hollow Shaft 4 Outer Surface 5 Hole 6 Metal Wire 7 Root 8 Tip 9 Rotating Axis 10 Safety Cover 11 Recess 12 Step

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[Procedure amendment]

[Submission date] November 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Name of device] Cutting blade for brush cutter

[Scope of utility model registration request]

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view when a plurality of metal element wires are embedded in a hole in the first embodiment.

FIG. 3 is a perspective view showing a second embodiment.

FIG. 4 is a front sectional view showing a third embodiment.

FIG. 5 is an enlarged cross-sectional view showing a buried portion of a metal element wire according to a fourth embodiment of the present invention.

FIG. 6 is a side view showing a state in which the cutting blade according to the first embodiment is attached to the brush cutter.

[Explanation of reference numerals] 1 body 2 frustoconical body 3 hollow shaft 4 outer peripheral surface 5 hole 6 metal element wire 61 metal element wire 7 root part 8 tip part 9 rotating shaft 10 safety cover 11 recess 12 step 13 end surface 14 convex Department

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Entire surface

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

Claims (4)

[Scope of utility model registration request] 1. A brush cutter, characterized in that a large number of holes are formed at regular intervals on an outer peripheral surface of a cylindrical body, and a flexible metal wire is embedded in the holes. Cutting blade. 2. A cylindrical body having an outer peripheral surface provided with a number of holes at regular intervals, and a plurality of flexible metal wires are embedded in the holes. Cutting blade for brush cutter. 3. The cutting blade for a brush cutter according to claim 1 or 2, wherein the shape of the body is frustoconical. 4. A cutting blade for a brush cutter according to any one of claims 1 to 3, wherein the metal wire is replaceable.