JP6461889B2 - Brush cutter with replaceable cord reel cassette and replaceable cord reel cassette used therefor - Google Patents

Description

  The present invention relates to a brush cutter including an exchangeable code reel cassette and an exchangeable code reel cassette used therefor.

  2. Description of the Related Art Conventionally, a brush cutter (also referred to as a mower) is known that has a prime mover, a shaft, and a rotary saw, and a user operates a handle fixed to the shaft to cut grass and small-diameter trees. Instead of the rotary saw, a resin cord such as a thick nylon cord may be attached to the rotor portion to which the rotary saw of the brush cutter is attached, and it may be used as a nylon cutter for kneading grass (see Patent Document 1). ). In such a brush cutter using a nylon cutter, generally, a type in which a long nylon cord is wound around the rotor portion of the brush cutter and the cord is pulled out from that, and a grommet is placed on one side of a nylon cord that has been cut short in advance. There is a type that is used by caulking it and inserting it into the rotor part of the brush cutter.

JP 2014-150765 A

  In any case, since the nylon cord gradually wears from the tip portion, the user must replace the nylon cord as necessary.

  In the case of a type using a long nylon cord, a replacement nylon cord is usually marketed in a state wound on a reel. Therefore, the user needs to remove the replacement nylon cord wound around the reel and attach it to the rotor portion of the brush cutter in a predetermined procedure. Such work is time consuming and laborious and requires familiarity. Further, in the case of a type using a nylon cord that has been cut short in advance, since the price per unit length is higher than that of a type using a long nylon cord, an economic burden is increased.

  An object of the present invention is a brush cutter using a resin cord such as a long nylon cord wound around a reel. A brush cutter that allows a user to easily replace a resin cord and a replacement resin cord used therefor are wound. It is to provide a cord reel cassette.

According to an aspect of the present invention, a brush cutter,
With a handle,
A rotor arranged at one end of the handle,
A driving source that applies a rotational force to the rotor and rotates the rotation shaft of the rotor;
A cord reel cassette that is fixed to the rotating shaft of the rotor and rotates with the rotation of the rotating shaft,
Resin cord,
A reel around which the resin cord is wound;
A cassette cover configured to hold the reel around which the resin cord is wound, and having a first take-out port for taking out the resin cord;
A cord reel cassette having
A cover member that is fixed to the rotating shaft of the rotor and rotates as the rotating shaft rotates. A space for accommodating the code reel cassette is formed therein, and the cover member is taken out from the take-out port. A cover member in which a second outlet for taking out the resin cord is formed;
A cord feeding mechanism that adjusts the length of the resin cord by turning the reel inside the cord reel cassette from the outside of the cover member;
The cord reel cassette is provided with a brush cutter configured to be replaceable.

  In the brush cutter of the present invention, the resin cord is disposed inside the exchangeable cord reel cassette, and the user can easily exchange the resin cord by exchanging the cord reel cassette. In addition, the user can easily adjust the length of the resin cord with the cord reel cassette mounted using the cord feeding mechanism. Therefore, when the resin cord is worn by work such as mowing grass, the user can easily extend the resin cord and adjust it to a required length, or replace the resin cord.

  Since the brush cutter of the present invention is provided with a replaceable cord reel cassette, it is easily replaced when it is desired to change to another type of resin cord or when the resin cord is worn out. be able to. Further, since the replaceable code reel cassette is covered by another cover member, the cassette cover itself of the code reel cassette does not need to have a sturdy structure. Therefore, it can be formed of, for example, a light resin material, and the replaceable code reel cassette can be reduced in weight and manufactured at low cost.

FIG. 1 is a schematic view of a brush cutter 10 according to the present invention. FIG. 2 is a schematic sectional view of the vicinity of the rotor unit 30 of the brush cutter 10. FIG. 3 is a schematic cross-sectional view of the rotor unit 30. FIG. 4 is a schematic view of the upper cover 32 and the cassette cover 120 of the cord reel cassette 100.

  A brush cutter 10 according to the present invention will be described with reference to the drawings. In the following description, as shown in FIG. 1, the upper side, the lower side, the left side, and the right side are defined.

  As shown in FIG. 1, the brush cutter 10 includes a cylindrical rod 20, a rotor portion 30 provided at one end of the rod 20, and a drive provided at an end portion of the rod 20 opposite to the rotor portion 30. It mainly includes a portion 40, a handle 50 provided on the side of the rod 20 close to the drive unit 20, and a guard 60 provided on the side of the rod 20 close to the rotor unit 30.

  The columnar rod 20 is a hollow metal pipe having a length of about 1500 mm to 1700 mm, and a drive unit 40 is attached to the upper end thereof. The drive unit 40 includes a motor 41 and a battery 42 for supplying electric power to the motor 41. The rotation of the rotating shaft 43 of the motor 41 is transmitted to the rotor unit 30 through a transmission mechanism (not shown) provided inside the rod 20. The rotor unit 30 includes a shaft 31 configured to rotate by a rotational driving force transmitted from the rotation shaft 43 of the motor 41 through a transmission mechanism, and an upper cover 32 and a lower cover fixed to the shaft 31 and rotated together with the shaft 31. 33 and a cord feeding mechanism 130 for rotating a later-described cord reel cassette 100 with respect to the lower cover 33.

  The handle 50 is a handle for the user to grip the brush cutter 10 and has a substantially U shape. A switch 51 that is linked to the motor 41 is attached to one end of the handle 50. While the user turns on the switch 51, the motor 41 is driven to rotate the rotor unit 30.

  The upper cover 32 of the rotor unit 30 is a metal cover member. As shown in FIG. 2, a substantially cylindrical side surface 320 and a circular upper surface 321 covering the upper side of the side surface 320 are provided. A hole through which the shaft 31 is inserted is formed in the central portion of the upper surface 321. The shaft 31 is threaded in a male thread shape, and the upper cover 32 inserted through the shaft 31 is fixed to the shaft 31 by a fastening member such as a nut.

  The lower cover 33 of the rotor unit 30 is also a metal cover member, similar to the upper cover 32, and has a substantially cylindrical side surface 330, an annular lower surface 331 that covers the lower side of the side surface 330, and a substantially center of the lower surface 331. And an opening for inserting a cord feeding mechanism 130 described later. As shown in FIG. 2, the upper cover 32 is attached above the lower cover 33 so as to be inserted into a space formed by the side surface 330 and the lower surface 331 of the lower cover 33. In a state where the lower cover 33 is attached to the upper cover 32, a cylindrical space for accommodating a later-described code reel cassette 100 is formed inside the upper cover 32 and the lower cover 33.

  As shown in FIG. 2, the side surface 330 of the lower cover 33 is screwed below the side surface 320 of the upper cover 32.

  As described above, the upper cover 32 can be fixed to the shaft 31. Furthermore, since the upper cover 32 and the lower cover 33 are fixed with screws, not only the upper cover 32 but also the lower cover 33 rotates as the shaft 31 rotates. As will be described later, two main body guide holes 323 for taking out the nylon cord 200 of the cord reel cassette 100 are formed on the side surface 320 of the upper cover 32.

  Next, the cord reel cassette 100 disposed inside the space formed by the upper cover 32 and the lower cover 33 of the rotor unit 30 will be described with reference to the drawings. As shown in FIG. 2, the cord reel cassette 100 includes a reel 110 around which a nylon cord 200 is wound, a hollow disc-shaped cassette cover 120 in which the reel 110 is disposed, and the reel 110 including the cassette cover 120 and the lower cover. And a cord feeding mechanism 130 for rotating from the outside of 33. The cassette cover 120 has a substantially circular shape when viewed from above, and includes a substantially circular upper plate portion 120A and a donut-shaped reel storage portion 120B whose upper surface is covered by the upper plate portion 120A. A reel 110 is disposed inside the reel storage unit 120B. Here, at the central portion of the reel 110, a gear-shaped uneven portion 110 </ b> A that fits with a fitting portion 130 of a cord feeding mechanism 130 described later is formed. The cassette cover 120 is configured to expose the uneven portion 110A of the reel 110 from the central portion of the donut-shaped reel accommodating portion 120B (see FIG. 4). As shown in FIGS. 3 and 4, two projecting portions 121 projecting in the radial direction are provided on the side surface of the cassette cover 120. The two projecting portions 121 are provided at positions 180 degrees apart from each other, and a take-out hole 122 for taking out the nylon cord 200 is formed in the inside. Since the take-out hole 122 has a cone-shaped taper shape that is tapered from the inside to the outside of the cassette cover 120, the nylon cord 200 can easily pass through the take-out hole 122.

  Further, since the reel housing portion 120B of the cassette cover 120 has a donut shape, an opening is formed in the center portion thereof. The cord feeding mechanism 130 is inserted into the opening from the opening of the lower cover 33 (see FIG. 2). The cord feeding mechanism 130 is a columnar fitting portion 131 that is fitted to the reel 110 arranged in the reel housing portion 120B of the cassette cover 120, and a substantially disc-shaped cord feeding portion that is arranged at the lower end of the fitting portion 131. And a knob 132. The fitting portion 131 is fitted to a gear-shaped uneven portion 110 </ b> A provided in the central portion of the reel 110. The cord feeding mechanism 130 is fixed to the reel 110 by fitting the fitting portion 131 to the concave and convex portion 110 </ b> A of the reel 110. In a state where the cord feeding mechanism 130 is fixed to the reel 110, the cord feeding knob 132 of the cord feeding mechanism 130 is exposed from the lower cover 33. The user can rotate the reel 110 arranged inside the lower cover 33 and the cassette cover 120 by turning the cord feeding knob 132. The cord feeding knob 132 is provided with a lock mechanism 150 for fixing the cord feeding knob 132 to the lower cover 33 so as not to rotate. For example, the cord feeding knob 132 is configured not to rotate with respect to the lower cover 33 by inserting the lock pin 151 into a lock hole for inserting the lock pin 151 provided in the lower cover 33. May be.

  Two nylon cords 200 are wound around the reel 110. By turning the cord feeding knob 132 in the direction of arrow A in FIG. 3, two nylon cords 200 can be sent out from the reel 110, and conversely, by turning the cord feeding knob 132 in the direction of arrow B. The two nylon cords 200 can be wound around the reel 110. The ends of the two nylon cords 200 are drawn out of the cassette cover 120 from a take-out hole 122 provided in the cassette cover 120. The user can adjust the length of the two nylon cords 200 extending from the cassette cover 120 to an appropriate length by turning the cord feeding knob 132 in the direction of arrow A or arrow B.

  Next, a method for replacing the cord reel cassette 100 in the brush cutter 10 according to the present invention will be described. When the brush cutter 10 is used to cut the kiwa, the tip of the nylon cord 200 is gradually worn. The user can purchase and replace the cord reel cassette 100 in which the reel 110 around which the two nylon cords 200 are wound is inserted.

  At the time of replacement, first, the screw between the upper cover 32 and the lower cover 33 is removed, and the lower cover 33 is pulled out downward, and the lower cover 33 is removed from the upper cover 32. At this time, the cord feeding mechanism 130 is also detached from the reel 110 and taken out together with the lower cover 33. The cord reel cassette 100 is removed from the upper cover 32.

  Next, a new cord reel cassette 100 is prepared, and the cord reel cassette 100 is inserted into the upper cover 32 in a state where the nylon cord 200 is pulled out from the take-out hole 122 of the cassette cover 120 with an appropriate length. At this time, the cord reel cassette 100 is inserted into the upper cover 32 so that the main body guide hole 323 of the upper cover 32 and the take-out hole 122 of the protruding portion 121 of the cassette cover 120 face each other. Then, the nylon cord 200 drawn out from the take-out hole 122 of the protruding portion 121 of the cassette cover 120 is drawn out from the main body guide hole 323 of the upper cover 32. At this time, the main body guide hole 323 has a cone-shaped tapered shape that swells from the inside of the lower cover 33 to the outside, similarly to the take-out hole 122 of the cassette cover 120, so that the nylon cord 200 can easily pass therethrough. It has become.

  With the nylon cord 200 of an appropriate length pulled out from the main body guide hole 323 of the upper cover 32, the lower cover 33 is attached so as to cover the upper cover 32 from below and screwed, and the upper cover 32 is fixed to the lower cover 33. Fixed against. Then, after the cord feeding knob 132 is turned to adjust the length of the nylon cord 200, the cord feeding knob 132 is locked to the lower cover 33 so as not to rotate carelessly.

  In the brush cutter 10 according to the present invention, the nylon cord 200 is contained in the cord reel cassette 100, and the user can easily replace the nylon cord 200 together with the cord reel cassette 100. At that time, it is not necessary to wrap a long nylon cord around the rotor part of the brush cutter like a conventional brush cutter, so that it is possible to save the user's trouble and easily even a user unfamiliar with the operation of the machine. Nylon cord can be replaced. In addition, when the user wants to use nylon cords having different thicknesses, the cord reel cassette 100 can be replaced as a whole, so that the labor for replacement can be greatly reduced as compared with a conventional brush cutter.

  In the brush cutter 10 according to the present invention, the replaceable cord reel cassette 100 is covered with the metal upper cover 32 and the lower cover 33, so even if pebbles or the like flies during the kneading operation, There is no risk of hitting the reel cassette 100 directly. Therefore, it is not necessary to form the cassette cover 120 of the cord reel cassette 100 from a metal material or the like. For example, the cassette cover 120 can be formed from a light material such as plastic or resin. it can.

  In addition, this invention is not limited to said embodiment, It can change in the range which does not deviate from the meaning of this invention. For example, although two nylon cords 200 are wound on the cord reel cassette 100, one nylon cord may be wound. Further, the cord is not necessarily made of nylon, and may be a cord formed of other resin. Further, the configuration of the cord feeding mechanism 130 is not necessarily limited to the configuration of the above-described embodiment, and any other configuration can be used as long as it has a function of taking out a nylon cord 200 having an appropriate length from the cord reel cassette 100. It may be realized. Further, the brush cutter 10 includes the battery 42 and is driven by electric power, but may be driven by an engine, for example.

10 Brush cutter 32 Upper cover 33 Lower cover 100 Code reel cassette

Claims (3)

A brush cutter,
With a handle,
A rotor arranged at one end of the handle,
A driving source that applies a rotational force to the rotor and rotates the rotation shaft of the rotor;
A cord reel cassette that is fixed to the rotating shaft of the rotor and rotates with the rotation of the rotating shaft,
Resin cord,
A reel around which the resin cord is wound;
A cassette cover configured to hold the reel around which the resin cord is wound, and having a first take-out port for taking out the resin cord;
A cord reel cassette having
A cover member that is fixed to the rotating shaft of the rotor and rotates as the rotating shaft rotates. A space for accommodating the code reel cassette is formed therein, and the cover member is taken out from the take-out port. A cover member in which a second outlet for taking out the resin cord is formed;
A cord feeding mechanism that adjusts the length of the resin cord by turning the reel inside the cord reel cassette from the outside of the cover member;
The cord reel cassette is a brush cutter configured to be replaceable.   The brush cutter according to claim 1, wherein the cassette cover is a resin cover, and the cover member is a metal cover.   3. The brush cutter according to claim 1, wherein the first take-out port and the second take-out port are configured in a cone shape that is tapered from the inside toward the outside.

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