JPH0219005Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a stand that also serves as a handle for a brush cutter and is equipped with a frame that can be used both as a handle and as a stand.

[Conventional technology]

In a conventional brush cutter of this type, as described in, for example, Japanese Utility Model Application Publication No. 59-88228, and as shown in FIG. 11, a fan case c is fixed to an engine case a by bolts b. A handle d is integrally formed on the upper side, and a stand e is formed on the lower side. Note that the handle d extends above the spark plug f, and the stand e extends below the fuel tank g and has the function of an engine stand. Both the handle d and the stand e are provided with lightening holes h, so as to be convenient for the operator to grasp.
i are formed respectively.

[The problem that the idea attempts to solve]

In the conventional brush cutter, as described above, the stand e and the handle d are formed independently, so the stand e is required when not working, for example, when filling fuel and when starting. Not only is the stand e unnecessary during work, but when the brush cutter is tilted during work, the stand e hits the worker's body, making it extremely difficult to work, and the stand e and handle d are each formed separately. In order to be
This increases the weight accordingly, which poses problems such as making it difficult for an operator to carry it while carrying it.

[Means to solve the problem]

This invention was made in view of the above-mentioned circumstances, and a cutting blade is rotatably supported at one end of an outer tube in which a transmission shaft is rotatably installed, and provided at the other end of the outer tube. In the brush cutter that can rotationally drive the cutting blade via the transmission shaft, the outer tube is bent into a substantially U-shape that straddles the side of the engine case fixed to the other end of the outer tube, and both ends are connected to the engine case. A frame body that is axially movable and rotatably locked in screw holes formed on opposite sides of the case, and a frame body that is movable in the axial direction and rotatably locked in the shaft body, and A brush cutter comprising grooves formed along directions substantially perpendicular to the extending direction of an outer pipe and capable of locking a frame body, and pressing means for pressing the frame body against these grooves in a locking direction. We propose a stand that doubles as a handle.

[Effect]

In the above configuration, by using a single frame as both the stand and the handle, the separate functions of the engine stand and the handle can be combined, eliminating the need for separate installations, and allowing the stand and handle to be used both during work and when not working. Since the roles of each handle are clear, they do not get in the way, the weight can be further reduced, and the state of the stand and handle can be changed with a single touch.

〔Example〕

This invention will be explained in detail below with reference to the accompanying drawings.

Figures 1 and 2 are a side view and a rear view of the main parts of a brush cutter based on this invention. A proximal end portion of an outer tube 3, which is pipe-shaped and has a transmission shaft 2 rotatably disposed therein, is fixed to the front end portion. A cutting blade 4 is rotatably supported at the distal end of the outer tube 3, and the cutting blade 4 is connected via a transmission shaft 2 to a drive shaft (not shown) of an engine that can be rotationally driven.

As shown in FIGS. 3 and 4, screw holes 5, 5 are formed in the opposing sides of the engine case 1 to which the other end of the outer tube 3 is fixed, and these screw holes 5, 5 have hexagonal holes. A head 6 having a cross section is formed, and male threaded portions 8 at the proximal ends of shafts 7 that are long in opposing directions are connected. It is also possible to form bosses 9, 9 that bulge outward as shown in the figure, in the vicinity surrounding the screw holes 5, 5, respectively. A frame body 10 that is bent into a substantially U-shape that straddles the side from one screw hole 5 to the other screw hole 5 is drilled at both ends when the shaft body 7 is screwed to the screw hole 5. By passing the shaft body 7 through the mounting holes 11 at the same time, the shaft body 7 is movable in the longitudinal direction and rotatably supported. Further, both end portions of the frame body 10 that are supported by the shaft are pressed in a direction in which they come into close contact with the engine case 1 by a coil spring 12 that is a pressing means that is compressed between the end portions and the head portion 6 of the shaft body 7. . Note that the coil spring 12 and the head 6 of the shaft body 7
A washer 13 is interposed between the two. Also, the frame 10
can be formed by bending a rod having a circular or square cross section. Furthermore, the rod can be solid or hollow.

Also, the swing center 17 of the frame 10 (both mounting holes 1
Grooves 14 and 15 are formed in the direction opposite to the direction of extension of the outer tube 3 and in the downward direction substantially perpendicular to the direction of extension of the outer tube 3 from the centers of the outer tubes 1 and 11, respectively. Groove 1
4 and 15, the vicinity of the mounting hole 11 at both ends of the frame body 10 can be engaged and detached while being pressed by the coil spring 12.

5 and 6 are a side view of the main part and a rear view of the main part showing a part in section, showing another embodiment of this invention, in which case the same as shown in FIGS. 3 and 4 above is shown. Instead of the coil spring 12, a pressing means is provided between the head 6' and the engine case 1 when the shaft 7' of the approximately cross-shaped head 6' is screwed into the screw hole 5 of the engine case 1. The grooves 14, 1 are sandwiched with the spring washer 13' interposed therebetween.
It is also possible to make it possible for both ends of the frame body 10 to be engaged with the frame member 5 . To change the state of the frame 10, loosen the screw connection of the shaft 7' and rotate the frame 10 to change the state of the other groove 14 or 1.
5 and tightening the threaded connection of the shaft 7' again, the frame 10 can be set in the respective position.

As shown in FIG. 7, by making the frame 10 rotatable upward (in the direction of arrow C), the frame 1
0 can not only protect the easily damaged plug 16, but also allow it to be used as a convenient carrying device. In this case, the groove 15 is formed upward from the swing center 17 of the frame 10.

This idea seems to have been mentioned above, so the 8th
As shown in the figure, when not mowing the grass,
Considering that the frame body 10 can be used as an engine stand, that is, when changing from a handle state to a stand state, in FIGS. move both ends of the frame 10 along the shaft 7 to take it out of the groove 14, and rotate the frame 10 in the direction of arrow A until both ends of the frame 10 engage with the groove 15. do. When both ends of the frame body 10 are engaged with the grooves 15, the engaged state is maintained by the pressing force of the spring 12, and the frame body 10 does not swing naturally.

In addition, in the case shown in FIGS. 5 and 6, the head 6' of the shaft 7' is grasped and rotated to loosen the connection between the shaft 7' and the screw hole 5 of the engine case 1, and both ends of the frame 10 are rotated. Move the part slightly in the axial direction and remove it from the groove 14,
The frame 10 is similarly rotated in the direction A to engage the groove 15, and the head 6' is gripped again to tighten the shaft 7' into the screw hole 5 of the engine case 1.
0 can be used as a stand.

When doing grass cutting work, please refer to Figure 1.
As shown in FIG. 8, by rotating both ends of the frame 10 from the groove 15 to the groove 14 by moving the frame 10 up to the two-dot chain line in substantially the same manner as described above, the frame 10 is
0 is rotated in the direction of arrow B and used as a handle when cutting grass. Also in this case, both ends of the frame 10 are engaged with the grooves 14, and the pressing means 12, 1
Since the engaged state is maintained by 3', the frame 1
This prevents 0 from returning naturally to its original state.

[Effect of idea]

As described above, this invention has the following effects.

(1) When not cutting grass, the frame 10 can be used as a stand, and when cutting grass, the frame 10 can be rotated and used as a handle, and can be used as both a stand and a handle. Therefore, the number of parts can be simplified.

(2) When the coil spring 12 is used as the pressing means, the grooves 14 and 15 can be easily engaged and disengaged from both ends of the frame 10, so that the frame 10 can be brought into the stand and handle states with a single touch. This makes it possible to immediately respond to changes in the pattern of frequent mowing work and non-work.

(3) During mowing work, the frame body 10 rotates from the stand state to the handle state, making it easy to work without touching the body during the work.

(4) By making the frame 10 rotatable upward, the easily damaged plug 16 can be protected, and it can also be used as a handheld handle for easy carrying.

[Brief explanation of drawings]

Figures 1 and 2 are a side view and rear view of the main parts of a brush cutter based on this invention, and Figures 3 and 4 are
Figures 5 and 6 are a side view of the main part and a partially sectional rear view of the main part showing different embodiments of the pressing means in this invention, and Figs. 7 and 8 are respectively different embodiments of the pressing means in this invention. A perspective view showing an embodiment of
1 and 10 are perspective views showing the non-working state and working state of this invention, respectively, and FIG. 11 is a front view showing the conventional mechanism. In the figure, 1... engine case, 3...
...Outer tube, 5...Mounting hole, 6...Head, 6'...Head, 7, 7'...Shaft body, 8...Male thread, 10...
...Frame body, 12...Coil spring (pressing means),
13'... Spring washer (pressing means), 14, 15...
It's a groove.

Claims (1)

[Claims for Utility Model Registration] 1. A cutting blade 4 is rotatably supported at one end of an outer tube 3 in which a transmission shaft 2 is rotatably installed, and a cutting blade 4 is provided at the other end of the outer tube 3. In a brush cutter that can rotationally drive the cutting blade 4 via a shaft 2, the outer tube 3 is bent into a substantially U-shape that straddles the side of the engine case 1 fixed to the other end, and both ends are bent. A frame body 10 is axially movably and rotatably engaged with a shaft body 7 or 7' in screw holes 5, 5 formed on opposite sides of the engine case 1, respectively, and a rocker of the frame body 10. Grooves 14 and 1 are formed along the direction opposite to the direction of extension of the outer tube 3 and the direction substantially orthogonal to the direction of extension of the outer tube 3 from the center of movement, respectively, and are capable of locking the frame 10.
5, and a pressing means 12 or 13' for pressing the frame 10 in the locking direction to these grooves 14 and 15. 2. A stand that also serves as a handle for a brush cutter according to claim 1, wherein bosses 9, 9 are formed in the vicinity surrounding the screw holes 5, 5 to bulge outward. 3. A stand that also serves as a handle for a brush cutter according to claim 1, wherein the frame body 10 has a circular or square cross section. 4. A stand that also serves as a handle for a brush cutter according to claim 1, wherein the frame body 10 is a solid body or a hollow body.