JP2012029681A - Blade part cover for bush cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade part cover for a bush cutter capable of easily protecting the blade part while supporting the blade part in a stable state even when carrying the bush cutter.SOLUTION: The blade part cover for the bush cutter 1 provided with: a long handle 21; the disk-like blade part 22; a front side supporting part 23; and a back side supporting part 24 for covering the blade part 22 of the bush cutter 20 includes: a front cover part 2 covering at least a half part of a back surface 22a of the blade part 22; a back cover part 3 arranged in the thickness direction at a predetermined interval and covering at least a half part of a back surface 22b of the blade part 22; a connecting part 6 connecting a peripheral part of the front cover part 2 and a peripheral part of the back cover part 3 so as to form an opening 4 and a housing part 5 between the front cover part 2 and the back cover part 3; a front slit part 7 formed by cutting out the front cover part 2; a back slit part 8 formed by cutting out the back cover part 3; and a bottom 9 provided in the opposite side of a side where the opening 4 is provided.

Description

  The present invention relates to a blade cover for a brush cutter that covers a blade portion of a brush cutter.

  Conventionally, a brush cutter has been used when performing operations such as mowing and cutting thin trees. Such a brush cutter includes a long handle portion supported by an operator, and a disc-shaped blade portion rotatably supported on one end side of the handle portion. The blade portion of the brush cutter is configured to be rotatable by a power source such as an engine or a motor. The operator can cut grass, thin trees, and the like with this rotating blade.

  By the way, when the work is completed or when the work place is changed, the brush cutter may be placed on a truck bed or the like and transported. In such a case, the blade portion of the brush cutter is often placed on the cargo bed or the like with the blade edge exposed, and the blade edge often comes into contact with the cargo bed or the like. For this reason, there is a possibility that the cutting edge may be lost or the placement location may be damaged by the cutting edge.

In view of this, conventionally, there has been provided a blade cover for a brush cutter that is attached to the blade portion so as to cover the blade portion of the brush cutter when the brush cutter is conveyed (see, for example, Patent Document 1).
This blade cover for a brush cutter is formed into a bag shape by a thin sheet made of rubber, synthetic resin, cloth or the like, and is configured to cover the blade portion of the brush cutter.

Japanese Utility Model Publication No. 5-15721

  The blade cover for a brush cutter described in Patent Document 1 covers the blade portion of the brush cutter so that the blade edge is not exposed, and the blade edge can be prevented from coming into direct contact with the placement location. For this reason, it is possible to suppress to some extent damage to the placement location due to chipping of the cutting edge or cutting edge.

  By the way, when the brush cutter is mounted on a truck bed or the like and transported, the blade portion of the brush cutter can be stably mounted (supported) on the bed or the like even if shaking or vibration occurs during traveling. is necessary. Therefore, the blade cover for the brush cutter is required to have sufficient rigidity to stably support the blade portion of the brush cutter.

However, since the blade cover for a brush cutter described in Patent Document 1 is formed into a bag shape by a thin sheet made of rubber, synthetic resin, cloth, or the like, it is difficult to configure it to have sufficient rigidity. is there. Therefore, in the blade cover for a brush cutter described in Patent Document 1, it is difficult to stably support the blade portion of the brush cutter. It was necessary to prepare a support member and to support the brush cutter with this support member.
Therefore, the operator has to prepare a separate support member when carrying the brush cutter, which is troublesome.

  An object of this invention is to provide the blade part cover for brush cutters which can protect a blade part easily, supporting a blade part in the stable state also at the time of conveyance of a brush cutter.

  The present invention relates to a long handle portion and a disc that is disposed on one end side of the handle portion with an acute angle with respect to the extending direction of the handle portion and is rotatably supported with respect to the handle portion. Shaped blade part, a front side support part provided at the center part on the surface side of the blade part and supporting the blade part, and a back side support part provided at the center part on the back side of the blade part and supporting the blade part A blade cover for a brush cutter that covers the blade of a brush cutter, and a front cover that covers at least half of the surface of the blade, and a predetermined interval in the thickness direction of the front cover An opening and an accommodation portion that accommodates the opening portion and the blade portion are formed between the back cover portion that covers at least half of the back surface of the blade portion, and the front cover portion and the back cover portion. Connection for connecting a part of the periphery of the front cover part and a part of the periphery of the back cover part And a front slit portion formed by cutting out the front cover portion from the side where the opening portion is provided, and a back surface formed by cutting out the back cover portion from the side where the opening portion is provided. The present invention relates to a blade cover for a brush cutter provided with a slit portion and a bottom surface portion provided on the side opposite to the side where the opening is provided.

  The size of the back slit portion is preferably larger than the size of the front slit portion.

  Further, it is preferable that the front cover portion and the back cover portion are formed in a quadrangle having substantially the same size.

  Moreover, it is preferable that the length of the side on the bottom surface side in the quadrangle is longer than the length of the side on the opening side in the quadrangle.

  Moreover, it is preferable that the magnitude | size of the said opening part in the thickness direction of the said front cover part is gradually enlarged toward the opening edge side from the said bottom face part side.

  Moreover, it is preferable that the said bottom part makes an acute angle with the surface of the said front cover part.

  Moreover, it is preferable to further provide a vent for communicating the inside and the outside of the housing portion.

  Further, the front cover part and / or the back cover part protrudes from the front cover part and / or the back cover part to the housing part side and can be brought into contact with the blade part housed in the housing part. It is preferable to further comprise a part.

  Further, the front cover part and / or the back cover part protrudes from the front cover part and / or the back cover part toward the housing part and is elastic to be able to contact the blade part housed in the housing part. It is preferable to further comprise a member.

  ADVANTAGE OF THE INVENTION According to this invention, the blade part cover for brush cutters which can protect a blade part easily can be provided, supporting the blade part in the stable state also at the time of conveyance of a brush cutter.

It is the perspective view which looked at the blade part cover 1 for brush cutters of 1st Embodiment of this invention from the upper side. It is the perspective view which looked at the blade part cover 1 for brush cutters of 1st Embodiment of this invention from the lower side. It is a figure which shows the bottom face part 9 of the blade part cover 1 for brush cutters of 1st Embodiment of this invention. It is sectional drawing which shows the vicinity of the bottom face part 9 of the blade part cover 1 for a brush cutter. When placing the brush cutter 20 without using the blade cover 1 for a brush cutter according to the first embodiment of the present invention (a) and mounting the brush cutter 20 using the blade cover 1 for a brush cutter. It is a perspective view which shows the case (b). It is a perspective view which shows the blade part cover 1A for brush cutters of 2nd Embodiment of this invention. It is a fragmentary sectional view which shows the blade part cover 1B for brush cutters of 3rd Embodiment of this invention. It is a partial side view which shows 1C of blade part covers for brush cutters of 4th Embodiment of this invention. It is a perspective view which shows the blade part cover 1D for brush cutters of 5th Embodiment of this invention. It is a top view which shows the blade part cover 1E for brush cutters of 6th Embodiment of this invention. It is a perspective view which shows the blade part cover 1F for brush cutters of 7th Embodiment of this invention. It is a perspective view which shows the blade part cover 1G for brush cutters of 8th Embodiment of this invention. It is a top view which shows the blade part cover 1H for brush cutters of 9th Embodiment of this invention. It is a top view which shows the blade part cover 1J for brush cutters of 10th Embodiment of this invention. It is a top view which shows the blade part cover 1K for brush cutters of 11th Embodiment of this invention. It is sectional drawing which shows the convex part 80 cut | disconnected by the AA line shown in FIG. It is a top view which shows 1L of brush cutter blade covers of 12th Embodiment of this invention. It is sectional drawing which shows the leaf | plate spring 85 cut | disconnected by the BB line shown in FIG.

[First Embodiment]
The brush cutter blade cover 1 according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 1 is a perspective view of the brush cutter blade cover 1 according to the first embodiment of the present invention as viewed from above. FIG. 2 is a perspective view of the brush cutter cover 1 according to the first embodiment of the present invention as viewed from below. FIG. 3 is a diagram showing a bottom surface portion of the blade cover 1 for a brush cutter according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view showing the vicinity of the bottom surface portion 9 of the blade cover 1 for a brush cutter. FIG. 5 shows a case (a) in which the brush cutter 20 is mounted without using the brush cutter blade cover 1 according to the first embodiment of the present invention, and the brush cutter 20 using the brush cutter blade cover 1. It is a perspective view which shows the case where (b) is mounted.

The brush cutter blade cover 1 according to the first embodiment of the present invention is attached to the blade portion 22 of the brush cutter 20 and covers the blade portion 22 as shown in FIGS. 1 and 2. First, a schematic configuration of the brush cutter 20 will be described.
As shown in FIGS. 1, 2, and 5 (a), the brush cutter 20 includes a long handle portion 21, a disc-shaped blade portion 22, a front side support portion 23 that supports the blade portion 22, and The back side support part 24, the engine (not shown) as a power source which rotates the blade part 22, and the transmission mechanism (not shown) which transmit the drive force of this engine to the blade part 22 are provided.

  The handle part 21 is a part supported by an operator. As shown in FIG. 5A, the handle portion 21 includes handle portions 25 and 26 that are gripped when an operator supports the handle portion 21. The handle portion 21 is constituted by, for example, a cylindrical pipe.

  The blade part 22 is a part that cuts grass, thin trees, and the like. A plurality of cutting edges 22 c are provided on the outer peripheral edge of the blade portion 22. The blade 22 is disposed on the one end 21 a side of the handle 21 with an acute angle θ <b> 1 with respect to the direction in which the handle 21 extends, and is supported rotatably with respect to the handle 21. The acute angle θ1 is preferably, for example, 30 to 45 degrees.

  As shown in FIG. 1, the front side support portion 23 is provided at the center portion on the surface 22 a side of the blade portion 22, and supports the blade portion 22 from the surface 22 a side of the blade portion 22. The front side support part 23 is comprised by substantially truncated cone shape, for example. As shown in FIG. 2, the back side support portion 24 is provided at the center of the blade portion 22 on the back surface 22 b side, and supports the blade portion 22 from the back surface 22 b side of the blade portion 22. The back side support part 24 is configured in a substantially cylindrical shape, for example.

  The back side support portion 24 includes an entanglement preventing member 24a that prevents vegetation and the like from being entangled with the back side support portion 24 and the like. The entanglement preventing member 24a is a substantially annular blade member, and is provided on the outer peripheral edge of the back side support portion 24 as necessary. The outer diameter of the back side support portion 24 provided with the entanglement preventing member 24 a is larger than the outer diameter of the front side support portion 23.

  In the present embodiment, the engine (not shown) is configured as, for example, an internal combustion engine that can be carried by a worker, but is fixed to the other end 21b side of the handle portion 21 (see FIG. 5A). It may be an internal combustion engine. The power source for rotating the blade portion 22 may be an electric motor instead of an engine as an internal combustion engine.

  The transmission mechanism includes, for example, a rotatable shaft member (not shown) and a gear mechanism (not shown) that transmits the rotation of the shaft member to the blade portion 22. The shaft member is inserted into the handle portion 21. The gear mechanism includes a bevel gear that transmits the rotation of the shaft member to the blade portion 22.

  Next, the brush cutter blade cover 1 will be described with reference to FIGS. As shown in FIG. 1 to FIG. 4, the brush cutter cover 1 includes a front cover portion 2 that covers the front surface 22 a of the blade portion 22, a back cover portion 3 that covers the back surface 22 b of the blade portion 22, and a front cover portion. 2, a connecting portion 6 that connects a part of the peripheral edge of the back cover part 3 and a part of the peripheral edge of the back cover part 3, a front slit part 7 formed by cutting the front cover part 2, and a back cover part 3 notched The back slit part 8 and the bottom face part 9 which were formed by being formed are provided.

The front cover portion 2 covers more than half of the surface 22 a of the blade portion 22. Here, “more than half of the surface 22a of the blade 22” is preferably about two-thirds of the entire surface 22a of the blade 22, for example.
The back cover part 3 is arranged at a predetermined interval in the thickness direction of the front cover part 2, and covers the back cover part 3 so as to exceed half of the back face 22 b of the blade part 22. Here, the “predetermined interval” refers to an interval larger than the thickness of the blade portion 22. Further, “more than half of the back surface 22b of the blade portion 22” is preferably about two-thirds of the entire back surface 22b of the blade portion 22, for example.

  The front cover part 2 and the back cover part 3 are configured in a rectangular shape (quadrangle) having substantially the same size. The long side of the rectangle is larger than the diameter of the blade portion 22. The long side of the rectangle refers to a side extending in the left-right direction (hereinafter sometimes referred to as a horizontal side) in FIGS. 1 and 2. Further, the short side of the rectangle is smaller than the diameter of the blade portion 22. The short side of the rectangle refers to a side (hereinafter sometimes referred to as a vertical side) extending in a direction intersecting with the long side.

  The connecting portion 6 is a pair of short sides (peripheral edges) of the front cover portion 2 so as to form an accommodating portion 5 that accommodates the opening 4 and the blade portion 22 between the front cover portion 2 and the back cover portion 3. And a pair of short sides (part of the peripheral edge) of the back cover portion 3 are connected.

  As shown in FIGS. 1 and 2, the accommodating portion 5 is a space for accommodating the blade portion 22 inserted from the opening 4. The opening 4 is opened at the end portion in the short side direction of the accommodating portion 5. The size of the long side direction in the opening 4 and the accommodating portion 5 is larger than the diameter of the blade portion 22. Further, the size (gap) of the opening 4 and the accommodating portion 5 in the thickness direction of the front cover portion 2 is substantially the same and is larger than the thickness of the blade portion 22.

  As shown in FIG. 1, the front slit portion 7 is formed by cutting out the front cover portion 2 from the side where the opening 4 is provided. The front slit portion 7 is cut out, for example, in a rectangular shape. In the front slit portion 7, the cutout length from the side where the opening 4 is provided is preferably about half the length of the short side of the front cover portion 2. Further, the notch length of the front slit portion 7 in the long side direction of the front cover portion 2 is larger than the maximum outer diameter of the front side support portion 23.

  As shown in FIG. 2, the back slit portion 8 is formed by cutting out the back cover portion 3 from the side where the opening 4 is provided. The back slit portion 8 is cut out in a rectangular shape, for example. In the back slit portion 8, the cutout length from the side where the opening 4 is provided is preferably about half of the length of the short side of the back cover portion 3. Further, the notch length of the back slit portion 8 in the long side direction of the back cover portion 3 is larger than the maximum outer diameter of the back side support portion 24 provided with the entanglement preventing member 24a.

  As described above, the outer diameter of the back support 24 provided with the entanglement preventing member 24 a is larger than the outer diameter of the front support 23. Therefore, the size of the back slit portion 8 is larger than the size of the front slit portion 7.

  As shown in FIGS. 1 to 4, the bottom surface portion 9 is provided on the opposite side of the front cover portion 2 and the back cover portion 3 from the side on which the opening portion 4 is provided, and closes the accommodating portion 5. Is provided. The bottom surface portion 9 is provided at a right angle to the front cover portion 2 and the back cover portion 3. The bottom surface portion 9 is mounted when the brush cutter 20 to which the blade cover 1 for the brush cutter is attached is placed on a predetermined placement surface 50 (see FIGS. 2 and 5B). 50 is a part in contact with 50.

  The blade cover 1 for a brush cutter configured as described above is preferably molded from a synthetic resin such as plastic so as to have sufficient rigidity.

  Next, the operation of the brush cutter blade cover 1 will be described with reference to FIG. As shown in FIG. 5A, when the brush cutter 20 is placed on the placement surface 50 without using the brush cutter cover 1, all the blade edges 22 c of the blade 22 are exposed. A part (lower part) of the blade edge 22 c is in contact with the mounting surface 50. At this time, a part of the weight of the brush cutter 20 acts on the cutting edge 22c, and therefore receives a predetermined frictional force from the mounting surface 50.

  In particular, when the placement surface 50 is a truck bed, the brush cutter 20 easily swings in the circumferential direction of the disk-shaped blade portion 22 due to vibrations or the like during the traveling of the truck. Therefore, when the brush cutter 20 is transported, the cutting edge 22 c that is in contact with the placement surface 50 is easily lost due to the frictional force received from the placement surface 50. Moreover, the mounting surface 50 was also easily damaged by the blade edge 22c.

  On the other hand, as shown in FIG. 5 (b), after the blade portion 22 of the brush cutter 20 is covered with the brush cutter blade cover 1 having sufficient rigidity according to the present embodiment, the brush cutter 20 is mounted on the mounting surface 50. In the case of mounting on the mounting surface 50, the bottom surface portion 9 of the blade cover 1 for a brush cutter comes into contact with the mounting surface 50. Therefore, the cutting edge 22 c does not contact the placement surface 50 and does not receive a frictional force from the placement surface 50. Therefore, the cutting edge 22 c is suppressed from being damaged by receiving the frictional force from the placement surface 50.

  In addition, when the brush cutter blade cover 1 is attached to the blade portion 22, the front side support portion 23 of the brush cutter 20 is disposed in the front slit portion 7 of the brush cutter blade cover 1. Therefore, the front side support part 23 and the front cover part 2 do not interfere. Accordingly, a portion of the surface 22 a of the blade portion 22 that is more than half of the surface 22 a is covered by the front cover portion 2.

  Further, when the brush cutter blade cover 1 is attached to the blade portion 22, the back side support portion 24 of the brush cutter 20 is disposed in the back slit portion 8 of the brush cutter blade cover 1. Therefore, the back side support part 24 and the back cover part 3 do not interfere. Thereby, the back cover part 3 covers a part of the back surface 22b of the blade part 22 that exceeds half.

The brush cutter blade cover 1 according to the first embodiment described above has the following effects.
The brush cutter cover 1 of the first embodiment accommodates the opening 4 and the blade 22 between the front cover 2, the back cover 3, and the front cover 2 and the back cover 3. A connecting portion 6 that connects a part of the periphery of the front cover portion 2 and a portion of the periphery of the back cover portion 3 so as to form the accommodating portion 5, a front slit portion 7, a back slit portion 8, and an opening portion 4 and a bottom surface portion 9 provided on the opposite side to the side on which 4 is provided.

  Therefore, the blade portion 22 is covered with the brush cutter cover 1 having sufficient rigidity, and the bottom surface portion 9 is brought into contact with the placement surface 50, whereby the frictional force from the placement surface 50 reaches the blade edge 22c. This can be prevented. Therefore, it is possible to suppress the cutting edge 22 c from being lost due to the frictional force from the placement surface 50. Further, the brush cutter blade cover 1 covering the blade part 22 is placed on the placement surface 50 in a stable state by the bottom face part 9. Therefore, even when the brush cutter 20 is transported, the blade portion 22 can be easily protected while supporting the blade portion 22 in a stable state.

  Further, the size of the back slit portion 8 is larger than the size of the front slit portion 7. Therefore, even when the entanglement preventing member 24a is mounted on the back side support portion 24, it is possible to prevent the entanglement preventing member 24a and the back cover portion 3 from interfering with each other. Therefore, the operator can attach the entanglement preventing member 24a to the back side support portion 24 as necessary.

  Moreover, the front cover part 2 and the back cover part 3 of the blade part cover 1 for brush cutters are comprised by the rectangle of substantially the same magnitude | size. Therefore, when the brush cutter 20 is transported by a truck, the brush cutter blade cover 1 housing the blade 22 can be prevented from swinging or rolling in the long side direction of the rectangle. Therefore, the brush cutter 20 can be stably placed on the placement surface 50.

  Next, another embodiment of the present invention will be described. The other embodiments will be described mainly with respect to differences from the first embodiment, and the same configurations as those of the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted. For the points not specifically described in other embodiments, the description of the first embodiment is appropriately applied or incorporated.

[Second Embodiment]
Next, a brush cutter blade cover 1A according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a perspective view showing a blade cover 1A for a brush cutter according to a second embodiment of the present invention.
As shown in FIG. 6, the lengths of the vertical sides of the front cover portion 2 and the back cover portion 3 in the brush cutter blade cover 1 </ b> A are larger than the diameter of the blade portion 22. That is, the brush cutter blade cover 1 </ b> A is configured to cover all the cutting edges 22 c of the blade 22 of the brush cutter 20. Other configurations are the same as in the case of the blade cover 1 for the brush cutter according to the first embodiment, and thus the duplicate description is omitted.

As described above, according to the brush cutter blade cover 1A of the second embodiment, the same effects as those of the brush cutter blade cover 1 of the first embodiment can be obtained, and the following effects can be obtained. Is done.
The brush cutter blade cover 1A of the second embodiment is configured to cover all the blade edges 22c of the blade portion 22 of the brush cutter 20.
Therefore, the exposed part of the blade edge 22c can be eliminated and the entire blade edge 22c can be protected. Moreover, it can suppress that an operator etc. touches the exposed part of the blade edge | tip 22c carelessly at the time of conveyance of the brush cutter 20. FIG.

[Third Embodiment]
Next, a brush cutter blade cover 1B according to a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a partial cross-sectional view showing a brush cutter blade cover 1B according to a third embodiment of the present invention.
As shown in FIG. 7, the size of the opening 4 in the thickness direction of the front cover portion 2 is gradually increased from the bottom surface (not shown) side toward the opening edge 4a. That is, the size of the opening 4 is larger than the size of the accommodating portion 5 in the thickness direction of the front cover portion 2.
Other configurations are the same as in the case of the blade cover 1 for the brush cutter according to the first embodiment, and thus the duplicate description is omitted.

As described above, according to the brush cutter blade cover 1B of the third embodiment, the same effects as those of the brush cutter blade cover 1 of the first embodiment can be obtained, and the following effects can be obtained. Is done.
In the brush cutter blade cover 1B of the third embodiment, the size of the opening 4 in the thickness direction of the front cover 2 gradually increases from the bottom surface (not shown) side toward the opening edge 4a. It is getting bigger.
Therefore, the blade edge 22 c can be easily inserted into the opening 4 when the blade cutter cover 1 </ b> B is attached to the blade portion 22 of the brush cutter 20.

[Fourth Embodiment]
Next, a brush cutter blade cover 1C according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a partial side view showing the blade cover 1C for a brush cutter according to the fourth embodiment of the present invention.
As shown in FIG. 8, the bottom surface portion 9 of the brush cutter blade cover 1 </ b> C is configured to form an acute angle θ <b> 2 with the surface 2 a of the front cover portion 2. The acute angle θ2 is preferably, for example, 30 to 60 degrees.

Next, the operation of the brush cutter blade cover 1C of the fourth embodiment will be described. As described above, the blade portion 22 (see FIG. 5A) is disposed on the one end 21a side of the handle portion 21 with an acute angle θ1 with respect to the direction in which the handle portion 21 extends. Therefore, as shown in FIG. 8, when the brush cutter 20 (not shown) in which the blade cutter cover 1 </ b> C is mounted on the blade portion 22 is placed on the placement surface 50, the bottom surface portion 9 is placed on the placement surface. 50 and in surface contact. Accordingly, a larger contact area between the bottom surface portion 9 and the placement surface 50 is ensured.
Other configurations and operations are the same as in the case of the blade cover 1 for a brush cutter according to the first embodiment, and thus a duplicate description is omitted.

As described above, according to the brush cutter blade cover 1C of the fourth embodiment, the same effects as the brush cutter blade cover 1 of the first embodiment are exhibited, and the following effects are also achieved. Is done.
In the brush cutter cover 1C of the fourth embodiment, the bottom surface 9 is configured to form an acute angle θ2 with the surface 2a of the front cover 2.
Therefore, a larger contact area between the bottom surface portion 9 and the placement surface 50 can be secured, and the brush cutter 20 can be placed on the placement surface 50 in a more stable state.

[Fifth Embodiment]
Next, a brush cutter blade cover 1D according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a perspective view illustrating a blade cover 1D for a brush cutter according to a fifth embodiment of the present invention.
As shown in FIG. 9, the front cover portion 2 and the back cover portion 3 are configured in a trapezoidal shape (for example, an isosceles trapezoidal shape) having substantially the same size, and the lower base (the side of the bottom surface portion 9 side) in this trapezoid The length of the horizontal side 28 is longer than the length of the upper base 29 (the horizontal side on the opening 4 side).
Other configurations and operations are the same as in the case of the blade cover 1 for a brush cutter according to the first embodiment, and thus a duplicate description is omitted.

As described above, according to the brush cutter blade cover 1D of the fifth embodiment, the same effects as the brush cutter blade cover 1 of the first embodiment are exhibited, and the following effects are also achieved. Is done.
In the brush cutter blade cover 1D of the fifth embodiment, the front cover portion 2 and the back cover portion 3 are configured in a trapezoidal shape having substantially the same size, and the length of the lower base 28 in the trapezoid is as follows. The upper bottom 29 is longer than the length. For this reason, the length of the bottom surface portion 9 in the horizontal side direction can be ensured longer, and the length of contact between the bottom surface portion 9 and the placement surface 50 can be ensured longer. Therefore, the brush cutter 20 can be placed on the placement surface 50 in a more stable state.

[Sixth Embodiment]
Next, a brush cutter blade cover 1E according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10: is a top view which shows the blade part cover 1E for brush cutters of 6th Embodiment of this invention.
As shown in FIG. 10, the brush cutter blade cover 1 </ b> E includes a dropout prevention member 30 and a vent 40.

  The fall prevention member 30 is a member that prevents the brush cutter blade cover 1E from falling off the blade portion 22 in a state where the brush cutter blade cover 1E is attached to the blade portion 22 of the brush cutter 20. Specifically, the drop-off prevention member 30 includes a drop-off prevention bar 31 and a rod case 32 in which the drop-off prevention bar 31 is detachably accommodated.

  The drop-off prevention bar 31 is a rod-like member, and has a length that is about half the length of the horizontal side of the front cover portion 2, for example. The rod case 32 is formed in a cylindrical shape into which the drop prevention rod 31 can be inserted. One end of the rod case 32 has an opening 33 into which the drop prevention rod 31 is inserted. The other end of the rod case 32 is closed. The rod case 32 is fixed to the front cover portion 2 so that the opening 33 faces the front slit portion 7 side. Further, the rod case 32 is provided on the front cover portion 2 so that the drop prevention rod 31 inserted into the rod case 32 crosses the front slit portion 7.

  As shown in FIG. 10, the vent 40 is formed by notching both end portions of the bottom surface portion 9 in the left-right direction. In other words, the vent 40 is an opening that allows communication between the outside and the inside (the accommodating portion 5) of the brush cutter blade cover 1E.

  Next, the operation of the brush cutter cover 1E of the sixth embodiment will be described. In the state where the brush cutter blade cover 1E is attached to the blade 22 of the brush cutter 20, the drop prevention rod 31 is inserted into the rod case 32 and set so as to cross the front slit portion 7.

  Then, the dropout prevention rod 31 restricts the front side support portion 23 from moving to the opening 4 side. That is, the brush cutter blade cover 1 </ b> E is prevented from dropping downward from the blade portion 22 of the brush cutter 20. As a result, when the operator moves to a work place with the brush cutter 20 to which the brush cutter blade cover 1E is attached, the brush cutter blade cover 1E is less likely to fall off the blade portion 22. Further, the ventilation holes 40 ensure air permeability of the housing portion 5.

  Other configurations and operations are the same as in the case of the blade cover 1 for a brush cutter according to the first embodiment, and thus a duplicate description is omitted.

As described above, according to the brush cutter blade cover 1E of the sixth embodiment, the same effects as those of the brush cutter blade cover 1 of the first embodiment can be obtained, and the following effects can be obtained. Is done.
The brush cutter cover 1E of the sixth embodiment further includes a dropout prevention member 30 and a vent 40.
For this reason, when the brush cutter 20 to which the brush cutter blade cover 1E is attached is moved to a work place or the like, the fall prevention member 30 prevents the brush cutter blade cover 1E from dropping from the blade portion 22. be able to.

  Further, the ventilation holes 40 can ensure the air permeability of the housing portion 5. Therefore, the blade part 22 to which moisture has adhered by mowing work or the like can be quickly dried inside the housing part 5, and the blade part 22 can be prevented from being rusted.

[Seventh Embodiment]
Next, a brush cutter blade cover 1F according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 11 is a perspective view illustrating a blade cover 1F for a brush cutter according to a seventh embodiment of the present invention. As shown in FIG. 11, the brush cutter blade cover 1 </ b> F includes a drop-off preventing member 60.

  The fall-off prevention member 60 is a member that prevents the brush cutter blade cover 1F from falling off the blade 22 in a state where the brush cutter blade cover 1F is attached to the blade 22 of the brush cutter 20. Specifically, the drop-off prevention member 60 includes a drop-off prevention bar 61, a rod case 62 that slidably houses the drop-off prevention bar 61 in the lateral direction of the front cover 2, and one end of the drop-off prevention bar 61 (FIG. 11). And a holding portion 63 for holding the right end portion).

  The drop-off prevention bar 61 is a bar-like member, and is, for example, slightly longer than the opening width of the front slit portion 7. A handle 61a is provided at the other end of the drop-off prevention rod 61 (the left end in FIG. 11). The handle portion 61 a is a portion that is picked when the operator slides the drop-off prevention rod 61. The handle portion 61a protrudes from the drop-off prevention bar 61 in a direction intersecting with the direction in which the drop-off prevention bar 61 extends (a direction substantially perpendicular to the paper surface in FIG. 11).

  The rod case 62 is formed in a U shape in a plan view, and the drop prevention rod 61 can be inserted. One end of the rod case 62 (the right end portion in FIG. 11) has an opening 64 into which the drop prevention rod 61 is inserted, and a stopper portion 65. The other end of the rod case 62 (the left end in FIG. 11) is closed. The rod case 62 is fixed to the front cover portion 2 so that the opening 64 faces the front slit portion 7 side. Further, the rod case 62 is provided on the front cover portion 2 so as to be substantially parallel to the lateral side of the front cover portion 2. The stopper portion 65 is provided so as to be substantially parallel to the vertical side of the front cover portion 2. The stopper portion 65 restricts the handle portion 61a from moving to the front slit portion 7 side. The holding part 63 is configured in a U shape in a plan view and can hold one end of the drop-off preventing bar 61.

  Next, the operation of the brush cutter cover 1F of the seventh embodiment will be described. In a state before the brush cutter blade cover 1 </ b> F is attached to the blade 22 of the brush cutter 20, the drop prevention bar 61 is stored in the bar case 62.

After attaching the blade cover 1F for the brush cutter to the blade 22 of the brush cutter 20, the handle 61a of the drop prevention bar 61 housed in the rod case 62 is picked and slid to the front slit portion 7 side to prevent the drop prevention rod. One end of 61 is arranged in the holding part 63. Thereby, the drop-off prevention rod 61 is set so as to cross the front slit portion 7.
Since other operations are the same as those of the brush cutter blade cover 1E of the sixth embodiment, a duplicate description is omitted.

As described above, according to the brush cutter blade cover 1F of the seventh embodiment, the same effects as the brush cutter blade cover 1 of the first embodiment are exhibited, and the following effects are also achieved. Is done.
The brush cutter blade cover 1F of the seventh embodiment further includes a drop-off prevention member 60.
Therefore, when the brush cutter 20 to which the brush cutter blade cover 1F is mounted is moved to a work place or the like, the fall prevention member 60 prevents the brush cutter blade cover 1F from falling off the blade portion 22. be able to. Further, the drop prevention rod 61 is restricted from sliding to the front slit portion 7 by the stopper portion 65 and the holding portion 63. Therefore, it is possible to prevent the drop prevention rod 61 from dropping from the rod case 62.

[Eighth Embodiment]
Next, a brush cutter blade cover 1G according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a perspective view showing a blade cover 1G for a brush cutter according to an eighth embodiment of the present invention. As illustrated in FIG. 12, the brush cutter blade cover 1 </ b> G includes a drop-off preventing member 70.

  The drop-off prevention member 70 is a member that prevents the brush cutter blade cover 1G from falling off the blade portion 22 in a state where the brush cutter blade cover 1G is attached to the blade portion 22 of the brush cutter 20. As described above, the dropout prevention member 60 (see FIG. 11) of the seventh embodiment includes the dropout prevention rod 61 configured to be slidable in the lateral direction of the front cover portion 2.

  On the other hand, the drop-off prevention member 70 of the eighth embodiment rotates around a rotation shaft 71a (described later) arranged in a direction intersecting the horizontal direction of the front cover portion 2 as shown in FIG. The point provided with the dropout prevention rod 71 that is freely configured is different from the dropout prevention member 60 of the seventh embodiment. Hereinafter, in the dropout prevention member 70 according to the eighth embodiment, the same components as those of the dropout prevention member 60 according to the seventh embodiment are denoted by the same reference numerals, and redundant description is omitted.

As shown in FIG. 12, the drop-off prevention member 70 holds the drop-off prevention rod 71, a rod case 62 that houses the drop-off prevention rod 71, and one end of the drop-off prevention rod 71 (the right end in FIG. 12). Holding part 63.
The drop-off prevention bar 71 is a bar-like member, and is, for example, slightly longer than the opening width of the front slit portion 7. A pair of rotary shafts 71 a project from the other end (the left end in FIG. 12) of the drop-off prevention rod 71 in a direction intersecting with the drop-off prevention rod 71. The rod case 62 rotatably supports the pair of rotating shafts 71a of the drop-off preventing rod 71.

  Next, the operation of the brush cutter cover 1G of the eighth embodiment will be described. In a state before the brush cutter blade cover 1G is attached to the blade 22 of the brush cutter 20, the drop prevention bar 71 is housed in the bar case 62.

After attaching the blade cover 1G for the brush cutter to the blade 22 of the brush cutter 20, the drop prevention rod 71 housed in the rod case 62 is rotated around the rotation shaft 71a to hold one end of the drop prevention rod 71. It arrange | positions in the part 63. FIG. Thereby, the drop-off prevention rod 71 is set so as to cross the front slit portion 7.
Since other operations are the same as those of the brush cutter blade cover 1E of the sixth embodiment, a duplicate description is omitted.

As described above, according to the brush cutter blade cover 1G of the eighth embodiment, the same effects as the brush cutter blade cover 1 of the first embodiment are exhibited, and the following effects are also achieved. Is done.
The brush cutter blade cover 1G of the eighth embodiment further includes a drop-off prevention member 70.
Therefore, when the brush cutter 20 to which the brush cutter blade cover 1G is mounted is moved to a work place or the like, the cutter prevention member 70 prevents the brush cutter blade cover 1G from falling off the blade 22. be able to.

  Further, the rotation prevention shaft 71 a of the drop-off prevention rod 71 is rotatably supported by the rod case 62. Therefore, it is possible to prevent the drop prevention rod 71 from dropping from the rod case 62 (the brush cutter blade cover 1G). Further, by switching the rotation direction of the drop-off prevention rod 71, the drop-off prevention rod 71 can be easily used when necessary.

[Ninth Embodiment]
Next, a brush cutter blade cover 1H according to a ninth embodiment of the present invention will be described with reference to FIG. FIG. 13: is a top view which shows the blade part cover 1H for brush cutters of 9th Embodiment of this invention.
The brush cutter blade cover 1E (see FIG. 10) of the sixth embodiment includes the vent holes 40 at both end portions of the bottom surface portion 9 in the left-right direction. On the other hand, as shown in FIG. 13, the vent 40 of the blade cover 1H for the brush cutter according to the ninth embodiment has an end portion on the bottom surface portion 9 side of the connecting portions 6 and 6 and a lateral portion of the bottom surface portion 9. Both ends are cut out. The vent 40 communicates the inside and the outside of the housing part 5.

  The other basic configuration of the brush cutter blade cover 1E according to the ninth embodiment is the same as that of the brush cutter blade cover 1A (see FIG. 6) according to the second embodiment, and a redundant description thereof will be omitted.

As described above, according to the brush cutter blade cover 1H of the ninth embodiment, the same effects as those of the brush cutter blade cover 1A of the second embodiment are exhibited, and the following effects are also achieved. Is done.
In the brush cutter blade cover 1H according to the ninth embodiment, in addition to the configuration of the brush cutter blade cover 1A (see FIG. 6) according to the second embodiment, the end of the connecting portions 6 and 6 on the bottom surface 9 side. Ventilation holes 40 are further provided at the left and right end portions of the bottom and bottom portions 9.
Therefore, the ventilation hole 40 can ensure the air permeability of the housing portion 5. Therefore, the blade part 22 to which moisture has adhered by mowing work or the like can be quickly dried inside the housing part 5, and the blade part 22 can be prevented from being rusted.

[Tenth embodiment]
Next, a brush cutter blade cover 1J according to a tenth embodiment of the present invention will be described with reference to FIG. FIG. 14: is a top view which shows the blade part cover 1J for brush cutters of 10th Embodiment of this invention.
As shown in FIG. 14, a brush cutter blade cover 1J of the tenth embodiment includes a vent 40 and a protrusion in addition to the configuration of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment. And a unit 9a.

  The vent 40 is formed by cutting out the end portions of the connecting portions 6 and 6 on the bottom surface portion 9 side, and communicates the inside and the outside of the housing portion 5.

  The protruding portion 9 a protrudes outward from both left and right end portions of the bottom surface portion 9. That is, the length of the bottom side (bottom surface portion 9) of the brush cutter blade cover 1J is longer than the length of the upper side (lateral side of the opening 4) of the brush cutter cover 1J. The protruding portion 9a is gradually narrowed outward. The tip of the protruding portion 9a is rounded.

  The rest of the basic configuration of the brush cutter blade cover 1J of the tenth embodiment is the same as that of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment, and a redundant description thereof will be omitted.

As described above, according to the brush cutter blade cover 1J of the tenth embodiment, the same effects as those of the brush cutter blade cover 1A of the second embodiment are exhibited, and the following effects are also achieved. Is done.
The brush cutter blade cover 1J of the tenth embodiment has the configuration of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment, and the end of the connecting portions 6 and 6 on the bottom surface 9 side. And the protrusions 9a provided at both end portions of the bottom surface portion 9 in the left-right direction.
Therefore, the ventilation port 40 can ensure the air permeability of the accommodating portion 5 and can suppress the blade portion 22 from being rusted.

  Moreover, by providing the protrusion part 9a, the length of the bottom face part 9 can be ensured long, and the length which the bottom face part 9 and the mounting surface 50 (refer FIG. 6) contact | abut sufficiently can be ensured. it can. Therefore, the brush cutter 20 can be placed on the placement surface 50 in a more stable state.

[Eleventh embodiment]
Next, a brush cutter blade cover 1K according to an eleventh embodiment of the present invention will be described with reference to FIGS. 15 and 16. FIG. 15: is a top view which shows the blade part cover 1K for brush cutters of 11th Embodiment of this invention. FIG. 16 is a cross-sectional view showing the convex portion 80 cut along the line AA shown in FIG.
As shown in FIGS. 15 and 16, the brush cutter blade cover 1 </ b> K of the eleventh embodiment has a vent 40 in addition to the configuration of the brush cutter blade cover 1 </ b> A (see FIG. 6) of the second embodiment. And a convex portion 80.

  As shown in FIG. 15, the vent hole 40 is formed by cutting out the end portions of the connecting portions 6 and 6 on the bottom surface portion 9 side, and communicates the inside and the outside of the housing portion 5.

  As shown in FIG. 16, the convex portion 80 is formed so as to protrude from the front cover portion 2 and the back cover portion 3 toward the housing portion 5 and to come into contact with the blade portion 22 housed in the housing portion 5. As shown in FIG. 15, five convex portions 80 are arranged between the left and right connecting portions 6 and the front slit portion 7 (back slit portion 8), and are arranged in parallel with the connecting portion 6.

  The convex part 80 is formed in a hemispherical shape, for example, and is formed integrally with the front cover part 2 and the back cover part 3. Although the size of the convex portion 80 varies depending on the size of the blade portion 22 to be accommodated, for example, the diameter is preferably about 8 mm and the height is about 2 mm.

  The other basic configuration of the brush cutter blade cover 1K of the eleventh embodiment is the same as that of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment, and therefore redundant description is omitted.

As described above, according to the brush cutter blade cover 1K of the eleventh embodiment, the same effects as the brush cutter blade cover 1A of the second embodiment are exhibited, and the following effects are also achieved. Is done.
In the brush cutter blade cover 1K of the eleventh embodiment, in addition to the configuration of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment, the end of the connecting portions 6 and 6 on the bottom surface 9 side. Vents 40 formed in the part, and a convex part that protrudes from the front cover part 2 and the back cover part 3 toward the accommodating part 5 and that can come into contact with the blade part 22 accommodated in the accommodating part 5 80.

Therefore, the ventilation port 40 can ensure the air permeability of the accommodating portion 5 and can suppress the blade portion 22 from being rusted.
Moreover, by providing the convex part 80 which can contact | abut to the blade part 22 of the brush cutter 20, the frictional force of the blade part cover 1K for brush cutters and the blade part 22 can be increased. Accordingly, when the operator holds the brush cutter 20 to which the brush cutter blade cover 1K is attached and moves to the work place or the like, the brush cutter blade cover 1K is less likely to fall off the blade 22.

[Twelfth embodiment]
Next, a brush cutter blade cover 1L according to a twelfth embodiment of the present invention will be described with reference to FIGS. 17 and 18. FIG. 17 is a plan view showing a brush cutter blade cover 1L according to a twelfth embodiment of the present invention. 18 is a cross-sectional view showing the leaf spring 85 cut along the line BB shown in FIG.
As shown in FIGS. 17 and 18, the brush cutter cover 1L of the twelfth embodiment has a vent 40 in addition to the configuration of the brush cutter cover 1A (see FIG. 6) of the second embodiment. A leaf spring 85, a mounting opening 86, and a locking portion 87.

  As shown in FIG. 17, the vent hole 40 is formed by cutting out the end portions of the connecting portions 6 and 6 on the bottom surface portion 9 side, and communicates the inside and the outside of the housing portion 5.

  As shown in FIG. 17, the attachment opening 86 is a rectangular through hole that is disposed between the connecting portion 6 and the front slit portion 7 (back slit portion 8) and is disposed in parallel with the connecting portion 6. . The attachment opening 86 is disposed at a position that can face the blade portion 22 accommodated in the accommodating portion 5.

As shown in FIGS. 17 and 18, a pair of locking portions 87 are provided in the vicinity of both longitudinal ends of the mounting opening 86 on the outer surfaces of the front cover portion 2 and the back cover portion 3, and a leaf spring 85. The both ends of the longitudinal direction (described later) are locked.
The locking portion 87 has a locking groove 87a into which an end portion in the longitudinal direction of a leaf spring 85 (described later) can be inserted. The locking groove 87 a is opened on the surface of the locking portion 87 that faces the mounting opening 86. The locking groove 87a extends in a direction parallel to the direction in which the connecting portion 6 extends.

As shown in FIG. 18, the leaf spring 85 has a rectangular shape in a plan view and has an arc shape protruding to one side in a side view. The arc-shaped portion of the leaf spring 85 is formed so as to be elastically contactable with the blade portion 22 accommodated in the accommodating portion 5. Both end portions in the longitudinal direction of the leaf spring 85 are linearly formed in a side view and are locked by a locking portion 87 described later.
As shown in FIG. 17, the arcuate portion of the leaf spring 85 is inserted into the mounting opening 86 of the front cover portion 2 and the back cover portion 3, and from the front cover portion 2 and the back cover portion 3 to the housing portion 5 side. It arrange | positions so that it may protrude.

  The other basic configuration of the brush cutter blade cover 1L of the twelfth embodiment is the same as that of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment, and a duplicate description thereof is omitted.

As described above, according to the brush cutter blade cover 1L of the twelfth embodiment, the same effects as the brush cutter blade cover 1A of the second embodiment are exhibited, and the following effects are also achieved. Is done.
In the brush cutter blade cover 1L of the twelfth embodiment, in addition to the configuration of the brush cutter blade cover 1A (see FIG. 6) of the second embodiment, the end of the connecting portions 6 and 6 on the bottom surface 9 side. And a leaf spring that protrudes from the front cover portion 2 and the back cover portion 3 toward the housing portion 5 and that can come into contact with the blade portion 22 housed in the housing portion 5. 85.

Therefore, the ventilation port 40 can ensure the air permeability of the accommodating portion 5 and can suppress the blade portion 22 from being rusted.
Further, by providing the leaf spring 85 that can come into contact with the blade portion 22 of the brush cutter 20, the frictional force (contact force) between the blade cover 1L for the brush cutter and the blade portion 22 can be increased. Therefore, when the operator holds the brush cutter 20 to which the brush cutter blade cover 1L is attached and moves to the work place or the like, the brush cutter blade cover 1L is less likely to fall off the blade section 22.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, in each of the embodiments described above, the blade cover 1, 1, A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1J, 1K, 1L for the brush cutter is molded from a synthetic resin such as plastic. However, the present invention is not limited thereto, and may be made of rubber, wood, or other materials as long as the blade 22 can be protected.

  Moreover, in the said 11th Embodiment, although the convex part 80 of the blade part cover 1K for brush cutters demonstrated as what protrudes in the accommodating part 5 side from both the front cover part 2 and the back cover part 3, to this, It does not restrict | limit, You may protrude from either the front cover part 2 or the back cover part 3 to the accommodating part 5 side.

  Further, in the twelfth embodiment, the leaf spring 85 of the brush cutter blade cover 1L has been described as protruding from both the front cover portion 2 and the back cover portion 3 toward the accommodating portion 5 side. It does not restrict | limit, You may protrude from either the front cover part 2 or the back cover part 3 to the accommodating part 5 side.

  In the twelfth embodiment, the leaf spring 85 has been described as an example of the elastic member provided on the blade cover 1L for the brush cutter. However, the elastic member is not limited to this, and the blade 22 is applied with a predetermined elastic force. Other elastic members such as rubber may be used as long as they can contact each other.

  Moreover, you may comprise the blade part cover for brush cutters combining the said each embodiment arbitrarily.

1,1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1J, 1K, 1L Brush cutter blade cover 2 Front cover part 2a Surface 3 Back cover part 4 Opening part 4a Opening edge 5 Housing part 6 Connection Part 7 Front slit part 8 Back slit part 9 Bottom face part 20 Brush cutter 21 Handle part 21a One end 22 Blade part 22a Front face 22b Back face 23 Front side support part 24 Back side support part 40 Ventilation hole 80 Convex part 85 Leaf spring (elastic member)
θ1, θ2 acute angle

Claims (9)

A long handle,
A disc-shaped blade portion disposed at one end side of the handle portion with an acute angle with respect to a direction in which the handle portion extends, and rotatably supported with respect to the handle portion;
A front-side support portion that is provided at a center portion on the surface side of the blade portion and supports the blade portion;
A back side support part provided at the center part on the back side of the blade part and supporting the blade part;
A blade cover for a brush cutter that covers the blade portion of a brush cutter comprising:
A front cover portion covering at least half of the surface of the blade portion;
A back cover portion disposed at a predetermined interval in the thickness direction of the front cover portion and covering at least half of the back surface of the blade portion;
A part of the peripheral edge of the front cover part and a part of the peripheral edge of the back cover part so as to form an accommodating part for accommodating the opening and the blade part between the front cover part and the back cover part. A connecting portion for connecting
A front slit part formed by cutting out the front cover part from the side where the opening is provided;
A back slit portion formed by cutting out the back cover portion from the side where the opening is provided;
A bottom surface provided on the side opposite to the side where the opening is provided;
A blade cover for a brush cutter comprising:   The blade part cover for a brush cutter according to claim 1, wherein a size of the back slit portion is larger than a size of the front slit portion.   The blade cover for a brush cutter according to claim 1 or 2, wherein the front cover portion and the back cover portion are formed in a quadrangle having substantially the same size.   4. The blade cover for a brush cutter according to claim 3, wherein a length of a side of the bottom surface portion in the quadrangle is longer than a length of a side of the quadrilateral on the opening portion side.   The brush cutter according to any one of claims 1 to 4, wherein a size of the opening in a thickness direction of the front cover portion is gradually increased from the bottom surface side toward the opening edge side. Blade cover.   The blade part cover for a brush cutter according to any one of claims 1 to 5, wherein the bottom surface part forms an acute angle with the surface of the front cover part.   The blade part cover for a brush cutter according to any one of claims 1 to 6, further comprising a vent hole that communicates the inside and the outside of the housing part.   The front cover part and / or the back cover part has a convex part that protrudes from the front cover part and / or the back cover part toward the storage part and can contact the blade part stored in the storage part. The blade cover for a brush cutter according to any one of claims 1 to 7, further comprising:   The front cover part and / or the back cover part is formed of an elastic member that protrudes from the front cover part and / or the back cover part to the storage part side and can contact the blade part stored in the storage part. The blade cover for a brush cutter according to any one of claims 1 to 7, further comprising:

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