JP7217485B1 - CORD REEL CASSETTE ATTACHABLE TO BRUSHCUTTER AND BRUSHCUTTER INCLUDING THE SAME - Google Patents

Abstract

To provide a bush cutter and a cord reel cassette wound with a replacement cord used for the brush cutter, which allows a user to easily replace the cord and easily adjust the length of the cord. The cord reel cassette 100 includes an upper cassette cover 120U provided with a hollow upper housing chamber 125, a lower cassette cover 120D provided with a hollow lower housing chamber 126, and the upper cassette cover 120U and the lower cassette cover 120D independently of each other. and a joint 121 rotatably connected. Separate nylon cords 200 are wound around the upper storage chamber 125 and the lower storage chamber 126, respectively.

Description

TECHNICAL FIELD The present invention relates to a cord reel cassette that can be attached to a brush cutter and a brush cutter having the same.

2. Description of the Related Art Conventionally, there has been known a brush cutter (also referred to as a lawn mower) that has a prime mover, a shaft, and a rotary saw, and that is used by a user to operate 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 is attached to the rotor portion of the bush cutter to which the rotary saw is attached, and it is sometimes used as a nylon cutter for weeding edges (see Patent Document 1). ). Brush cutters that use such nylon cutters generally have a long nylon cord wound around the rotor of the brush cutter and pulled out from the cord, and a nylon cord that has been cut short in advance and has an eyelet attached to one side. There is a type that is used by crimping and inserting it into the rotor of the brush cutter.

JP 2014-150765 A

In either case, the nylon cord gradually wears from the tip portion, so the user has to replace the nylon cord as necessary.

In the case of the type using a long nylon cord, replacement nylon cords are usually commercially available wound on reels. 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 by a predetermined procedure. Such work is time consuming and labor intensive, and requires practice. In addition, in the case of the type using nylon cords that have been cut short in advance, the price per unit length is higher than that of the type using long nylon cords, thus increasing the economic burden.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a brush cutter of the type that uses a cord, such as a long nylon cord wound on a reel, in which the user can easily replace the cord and easily adjust the length of the cord. To provide a cord reel cassette wound with a cutter and a replacement cord used therefor.

According to an aspect of the invention,
an upper cassette cover provided with a hollow upper storage chamber;
a lower cassette cover provided with a hollow lower storage chamber;
a joint vertically connecting the upper cassette cover and the lower cassette cover;
comprising two cords respectively arranged in the upper storage chamber and the lower storage chamber,
The joint connects the upper cassette cover and the lower cassette cover so that the upper cassette cover and the lower cassette cover are rotatable independently of each other, thereby connecting the two cords. A cord reel cassette is provided that is characterized by an adjustable length .

In the cord reel cassette of the present invention, the upper cassette cover and the lower cassette cover are respectively provided with an upper storage chamber and a lower storage chamber, and two cords are arranged in the upper storage chamber and the lower storage chamber respectively. It is Also, the upper cassette cover and the lower cassette cover are jointed vertically so that they can rotate independently. Therefore, when two cords are accommodated in the cord reel cassette so as to be wound, there is no possibility that the cords will get entangled.

FIG. 1 is a schematic diagram of a brush cutter 10. As shown in FIG. FIG. 2 is a schematic illustration of the upper cover 32, the lower cover 33, and the cord reel cassette 100. As shown in FIG. FIG. 3 is a schematic explanatory view of the upper cover 32 and the cord reel cassette 100 viewed from above. FIG. 4 is a schematic diagram for explaining adjustment of the length of the nylon cord 200 using the cord adjusting mechanism 400. FIG. FIG. 5 is a schematic explanatory diagram for explaining a cord adjusting mechanism 450 having a stopper 451, an abutting portion 452 and a locking portion 453. FIG. FIG. 6 is a schematic diagram for explaining a cord adjusting mechanism 480 having a lever 481 and a contact portion 485. As shown in FIG.

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

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 shaft provided at the end 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 closer to the drive portion 20 , and a guard 60 provided on the side of the rod 20 closer to the rotor portion 30 .

The cylindrical rod 20 is a hollow metal pipe with a length of approximately 1500 mm to 1700 mm, and has a driving section 40 attached to its upper end. The drive unit 40 includes a motor 41 and a battery 42 for supplying power to the motor 41 . Rotation of the rotating shaft 43 of the motor 41 is transmitted to the rotor portion 30 through a transmission mechanism (not shown) provided inside the rod 20 . As shown in FIG. 2, the rotor portion 30 includes a shaft 31 that is configured to rotate by a rotational driving force transmitted from a rotating shaft 43 of a motor 41 through a transmission mechanism, and a shaft 31 that is fixed to and rotates together with the shaft 31 . It comprises a rotating upper cover 32 and a lower cover 33, and a cord reel cassette 100 which will be described later.

The handle 50 is a handle for the user to grip the brush cutter 10 and has a substantially U shape. A switch 51 interlocking with a motor 41 is attached to one end of the handle 50 , and while the switch 51 is turned on by the user, the motor 41 drives and the rotor section 30 rotates.

The upper cover 32 of the rotor section 30 is a metallic cover member. As shown in FIG. 2, it comprises a substantially cylindrical shaped side wall 320 and a circular top wall 321 covering the side wall 320 from above. A hole through which the shaft 31 is inserted is formed in the central portion of the upper wall 321 . The shaft 31 is threaded into a male thread, and the upper cover 32 inserted through the shaft 31 is fixed to the shaft 31 with a fastening member such as a nut.

The lower cover 33 of the rotor section 30 is also a cover member made of metal like the upper cover 32, and has a substantially cylindrical side wall 330 and a circular lower wall 331 covering the side wall 330 below. As shown in FIG. 2, the lower cover 33 is fixed below the upper cover 32 by screws or the like so as to cover the upper cover 32 from below. When the lower cover 33 is attached to the upper cover 32, a columnar space is formed between the upper cover 32 and the lower cover 33 to accommodate a cord reel cassette 100, which will be described later.

Note that the upper cover 32 can be fixed to the shaft 31 as described above. Furthermore, since the upper cover 32 and the lower cover 33 are fixed with screws or the like, not only the upper cover 32 but also the lower cover 33 rotate as the shaft 31 rotates. The side wall 320 of the upper cover 32 is formed with two body guide holes 323 (see FIG. 3) for taking out the nylon cord 200 of the cord reel cassette 100, as will be described later.

Next, the cord reel cassette 100 arranged inside the space formed by the upper cover 32 and the lower cover 33 of the rotor section 30 will be described with reference to the drawings. As shown in FIG. 2, the cord reel cassette 100 includes an upper cassette cover 120U provided with a hollow upper accommodating chamber 125, a lower cassette cover 120D provided with a hollow lower accommodating chamber 126, and an upper cassette cover 120U. and a joint 121 for independently rotatably connecting the lower cassette cover 120D. Both the upper cassette cover 120U and the lower cassette cover 120D have donut-shaped outer shapes. A doughnut-shaped upper storage chamber 125 and a donut-shaped lower storage chamber 126 are defined inside the upper cassette cover 120U and the lower cassette cover 120D, respectively. Each of the upper storage chamber 125 and the lower storage chamber 126 contains another nylon cord 200 wound thereon. In this embodiment, the nylon cord 200 wound around the upper storage chamber 125 and the nylon cord 200 wound around the lower storage chamber 126 are wound in opposite directions. . The outer peripheral portion of the upper cassette cover 120U and the outer peripheral portion of the lower cassette cover 120D are formed with take-out holes (not shown) for taking out the nylon cords 200, respectively.

As shown in FIGS. 2 and 3, the two nylon cords 200 pulled out from the upper storage chamber 125 and the lower storage chamber 126 are pulled out from two body guide holes 323 provided in the side wall 320 of the upper cover 32. . As shown in FIG. 3, a cord adjustment mechanism 400 is provided on the side wall 320 of the upper cover 32 near the body guide hole 323 . As shown in FIG. 2, the cord adjustment mechanism 400 includes one gear (first gear 411 and second gear 412) provided on the upper cover 32 and a lock (not shown) that locks rotation of the first gear 411. and The first gear 411 and the second gear 412 are arranged vertically, and the nylon cord 200 is sandwiched between the first gear 411 and the second gear 412 . The upper part of the first gear 411 is exposed from the upper surface of the upper cover 32, and the user can turn the upper part of the first gear 411 to send out or pull in the nylon cord 200 toward the body guide hole 323. can be done. Thereby, the length of the nylon cord 200 pulled out from the body guide hole 323 can be appropriately adjusted (see FIG. 4). Further, by locking the rotation of the first gear 411 with a lock mechanism (not shown), the length of the nylon cord 200 pulled out from the body guide hole 323 can be fixed. By driving the motor to rotate the shaft 31 while the length of the nylon cord 200 is fixed, the nylon cord 200 can be rotated and used for mowing.

Next, a method for exchanging 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 grass, the tip of the nylon cord 200 is gradually worn out. A user can purchase and replace the cord reel cassette 100 with two nylon cords 200 wound thereon.

For replacement, first, the screw between the upper cover 32 and the lower cover 33 is removed, and the lower cover 33 is removed from the upper cover 32. - 特許庁Next, the cord reel cassette 100 to be replaced is removed from the upper cover 32 . Next, a new cord reel cassette 100 is prepared and attached to the upper cover 32 . At this time, the two nylon cords 200 are pulled out of appropriate lengths from the take-out holes of the upper cassette cover 120U and the lower cassette cover 120D, and the respective nylon cords 200 are connected to the first gear 411 and the second gear 412 of the cord adjusting mechanism 400. The cord reel cassette 100 is attached to the upper cover 32 by passing between the . Further, the nylon cord 200 is pulled out from the body guide hole 323 of the upper cover 32 .

Using the cord adjusting mechanism 400, the length of the nylon cord 200 pulled out from the body guide hole 323 is adjusted to an appropriate length. Then, the lower cover 33 is attached so as to cover the upper cover 32 from below and screwed to fix the lower cover 33 to the upper cover 32 . Then, the first gear 411 is locked so as not to rotate carelessly.

In the bush cutter 10 according to the present invention, the nylon cord 200 is contained in the cord reel cassette 100 , so that the user can easily replace the nylon cord 200 together with the cord reel cassette 100 . At that time, unlike conventional brush cutters, there is no need to wind a long nylon cord around the rotor of the brush cutter. A nylon cord can be exchanged. In addition, when the user wants to use nylon cords of different thicknesses, he or she can replace the entire cord reel cassette 100, which saves a lot of time and effort for replacement compared to conventional brush cutters.

In the brush cutter 10 according to the present invention, the replaceable cord reel cassette 100 is covered with the upper cover 32 and the lower cover 33 made of metal. There is no danger of direct contact with the reel cassette 100.例文帳に追加Therefore, the upper cassette cover 120U and the lower cassette cover 120D of the cord reel cassette 100 do not need to be made of a metal material or the like, and can be made of a lightweight material such as plastic or resin. It can be formed inexpensively.

In the brush cutter 10 according to the present invention, the cord reel cassette 100 has an upper cassette cover 120U with an upper storage chamber 125 and a lower cassette cover 120D with a lower storage chamber 126. As shown in FIG. Therefore, even though two nylon cords 200 are wound around and stored in the cord reel cassette 100, there is no risk of them getting entangled. Further, in the bush cutter 10 according to the present invention, the upper cover 32 is provided with the two cord adjusting mechanisms 400, so that the user can easily adjust the length of the nylon cord 200. FIG. Also, the brush cutter according to the present invention has two cord adjustment mechanisms 400 . Two nylon cords 200 are connected to separate cord adjusting mechanisms 400, respectively. Therefore, the length of the two nylon cords 200 can be adjusted independently.

It should be noted that the present invention is not limited to the above embodiments, and can be modified without departing from the gist of the present invention. For example, although the cord reel cassette 100 is wound with the nylon cord 200, the cord may not necessarily be made of nylon, and may be made of other resins. The outer shape of the cord reel cassette 100 does not necessarily have to be donut-shaped, and may be of any suitable shape.

Although the two cord adjusting mechanisms 400 are provided on the upper cover 32 in the above embodiment, they do not necessarily have to be provided on the upper cover 32 and may be provided on the lower cover 33 . Also, the configuration of the cord adjusting mechanism 400 is not necessarily limited to the configuration of the above-described embodiment. , may be implemented by other configurations. Other configurations of the cord adjustment mechanism 400 will be described below with examples, but the present invention is not limited to these examples.

Instead of the first gear 411 and the second gear 412 of the cord adjusting mechanism 400, a wheel having a non-slip surface such as rubber can be used. Alternatively, the configuration of the cord adjustment mechanism 400 is not limited to a mechanism that adjusts the length of the nylon cord 200 as a gear or a non-slip wheel rotates. It may be a mechanism that adjusts the length of 200 .

Alternatively, as shown in FIG. 5, the cord adjustment mechanism 450 has a stopper 451 that moves vertically between a contact position that contacts the nylon cord 200 and a separation position that separates it from the nylon cord 200. may have a contact portion 452 facing the stopper 451 and a lock portion 453 for fixing the stopper 451 at the contact position. The lock portion 453 has a lock pin 453a that moves horizontally, and the side surface of the stopper 451 is provided with a hole 451a into which the lock pin 453a is inserted. The stopper 451 is provided with a spring 451b. By inserting the lock pin 453a into the hole 451a in a state where the stopper 451 is pushed into the contact position against the spring 451b, the nylon cord 200 can be clamped and fixed between the stopper 451 and the contact portion 452. . The nylon cord 200 can be freely moved between the stopper 451 and the contact portion 452 by removing the lock pin 453a from the hole 451a and pushing up the stopper 451 to the separated position by the spring 451b.

Alternatively, as shown in FIG. 6, the cord adjustment mechanism 480 faces the lever 481 rotating about the shaft 483 between the contact position and the separation position and the base end 482 of the lever 481 at the contact position. A contact portion 485 may be provided. The contact position is the position of the lever 481 indicated by the solid line in FIG. The separated position is the position of the lever 481 indicated by the dotted line in FIG. The contact portion 485 is an elastic member such as a leaf spring or rubber. When rotating the lever 481 toward the contact position, the base end 482 of the lever 481 is pressed toward the contact portion 485 . At this time, the nylon cord 200 can be sandwiched and fixed between the base end 482 of the lever 481 and the contact portion 485 . Further, when the lever 481 is rotated toward the separated position, a gap is generated between the proximal end 482 of the lever 481 and the contact portion 485 . As a result, the nylon cord 200 fixed by being sandwiched between the proximal end 482 of the lever 481 and the contact portion 485 can be freely moved.

In the above embodiment, the bush cutter 10 is provided with the battery 42 and driven by electric power, but the present invention is not limited to such an aspect, and may be driven by an engine, for example.

Claims (5)

an upper cassette cover provided with a hollow upper storage chamber;
a lower cassette cover provided with a hollow lower storage chamber;
a joint vertically connecting the upper cassette cover and the lower cassette cover;
comprising two cords respectively arranged in the upper storage chamber and the lower storage chamber,
The joint connects the upper cassette cover and the lower cassette cover so that the upper cassette cover and the lower cassette cover are rotatable independently of each other, thereby connecting the two cords. A cord reel cassette characterized by being adjustable in length . a rod provided with a handle;
a rotating shaft disposed at one end of the rod;
a driving source that applies a driving force to the rotating shaft to rotate it;
a rotor section that is fixed to the rotating shaft and rotates with the rotation of the rotating shaft, wherein the rotor section is
The cord reel cassette according to claim 1;
a cover member fixed to the rotating shaft so as to cover the cord reel cassette;
The cover member has two guide holes through which the two cords of the cord reel cassette are inserted and drawn out of the cover member, and the length of the two cords drawn out from the two guide holes. A brush cutter characterized by being provided with two cord adjustment mechanisms for adjusting each. 3. The brush cutter of claim 2, wherein each cord adjustment mechanism comprises a pair of gears or a pair of non-skid wheels that sandwich one of the two cords. The cord adjustment mechanism includes a stopper that moves vertically to a contact position that contacts one of the two cords and a separated position that separates from one of the two cords, and a stopper that moves to the contact position. an abutting portion arranged at a position facing the stopper so as to sandwich one of the two cords in cooperation with the stopper when the cord is in the contact position; and a locking portion for fixing the stopper at the abutting position. 3. The brush cutter of claim 2, comprising: The cord adjustment mechanism includes a lever that rotates between a contact position that contacts one of the two cords and a separation position that separates from one of the two cords, and the lever is at the contact position. 3. The bush cutter according to claim 2, further comprising an abutting portion arranged at a position facing said lever so as to cooperate with said lever to sandwich one of said two cords when necessary.

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