JPH026740Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention provides protrusions and notches on the core bar and the mounting bracket for fixing the handle, respectively, and attaches a pair of left and right handles to the core bar. This invention relates to a handle fixing device for a brush cutter that can be easily and reliably fixed to the center of the handle.

[Conventional technology]

As a handle fixing mechanism for a brush cutter widely used for cutting weeds, lawns, vines, etc., for example, (i) as shown in Fig. 1, pipe-shaped left and right handles 1, 2 is held between upper and lower mounting brackets 3 and 4 having recesses a and b each having a semicircular cross section, and these mounting brackets 3 and 4 are joined and fixed with a fastener 5 such as a bolt. , left and right handles 1 and 2 can be set at fixed positions. Note that in the lower center of the lower mounting bracket 4, the recess b
A recess c with a semicircular arc shape in cross section is formed perpendicular to the outer tube holder 7 which is joined and fixed to the lower part of the mounting bracket 4 with a fastener 6. However, a configuration is adopted in which the outer tube 8 can pass through the through hole having a circular cross section formed by these recesses c and d. In addition, (ii) instead of separate left and right handles, a handle fixing mechanism is also adopted in which a single pipe-shaped handle is held between the above-mentioned mounting brackets.
(For example, see Japanese Utility Model Publication No. 57-46742.) [Problem to be solved by the invention] In both cases (i) and (ii) described in the conventional technology, the pipe-shaped handle is・Because it is only held and fixed by the lower pair of mounting brackets, it is like a bolt that fixes the upper and lower mounting brackets by the vibration of each member when the engine is running or the impact caused by the brush blade coming into contact with a foreign object. There is a risk that the fastener may become loose and the handle may slide on the inner edge of the mounting bracket, making the pressing force of the cutting blade on the object to be cut unstable, making it impossible to expect sufficient cutting work. In the case of (i), the handles 1 and 2 will gradually come closer together due to repeated mowing operations, and the tips will rub against each other and be cut off, or the handles will be cut in either the left or right direction. There is a risk that a worker (not shown) who can slide and grip the handles 1 and 2, respectively, may be forced to take a slightly unbalanced posture during work, and furthermore, when the handles 1 and 2 are initially assembled, the handles 1 and 2 may not be in a balanced state. It has problems such as being difficult to install from below.

This idea was proposed by focusing on the above-mentioned problems, and its purpose was to form protrusions and notches on the core metal and mounting bracket, respectively, so that the left and right handles could be attached to the core. To provide a handle fixing device for a brush cutter that can simply and reliably maintain the initial setting position at the center of the handle at all times.

[Means to solve the problem]

In order to achieve the above object, the brush cutter handle fixing device according to the present invention has a handle fixing device in the middle of an outer tube, which has a prime mover at one end and a cutting blade driven by the prime mover at the other end. In the handle fixing device for a brush cutter, which is integrally assembled with an outer tube fixing section that clamps the outer tube and the outer tube, the handle fixing section includes a protrusion that abuts and restrains the tips of the left and right pipe-shaped handles. A core metal having a part formed thereon;
An upper mounting bracket and a lower mounting bracket, each having a notch into which the protrusion can be fitted, formed in the center of a recess into which the upper and lower ends of the handle are fitted, respectively, to cover and fit the cored metal; It consists of a mounting bracket and a fastener that fastens the lower mounting bracket.

〔Example〕

An embodiment of this invention will be described with reference to FIGS. 2, 3, and 4. A protrusion p is projected from the central outer peripheral edge of a pipe-shaped core metal 11, and a notch t into which the protrusion p fits. , v, upper mounting bracket E, lower mounting bracket F
recesses g, each having a semicircular cross section along the longitudinal direction of both sides of the notches t and v, respectively;
female threads i, n are carved into the bulges at the ends of the flat parts 12, 13 formed on both sides of these recesses g, h, and fasteners 1 are formed on these female threads i, n.
Bolts 4 are screwed together and fastened through flat washers as fasteners 15 and spring washers as fasteners 16. Also, a semicircular recess U of the same size that faces the semicircular recess r provided below the lower mounting bracket F.
The outer tube holder Z having the same shape as that shown in FIG. 1 is the same as that shown in FIG.
By bringing the tips of the left and right handles 17, 18 into contact with and stopping the projections p, the set positions of the handles 17, 18 can be automatically determined. In the figure, K is the outer tube, 19 and 20 are female threads carved into the lower mounting bracket F and the outer tube holder Z, respectively.
1 is a bolt, 22 and 23 are flat washers, 24 and 25 are spring washers, and 26 is a grip.

[action, effect]

Since this device has the above-mentioned configuration, the handle 1 is inserted from the left and right toward the protrusion p of the core metal 11.
7 and 18 into the core metal 11 and when the tips are brought into contact with the protrusion p, the core metal 11 of the handles 17 and 18
The mounting position can be automatically and reliably set, and the clamping length can be set to a constant length, and each of the handles 17 and 18 has a recess in the upper and lower mounting brackets E and F at the top and bottom. g and h, and are fastened to the upper mounting bracket E and lower mounting bracket F using fasteners 14, 15, and 16, and the protrusion p is inserted into the notch of the upper mounting bracket E and lower mounting bracket F. Since the parts t and v are engaged, the core metal 11 and the handle 1
7, 18, the upper mounting bracket E and the lower mounting bracket F are integrally and firmly connected, so that the handles 17, 1
Since the handles 8 are always maintained at their initial positions, there is no risk that the handles 17 and 18 will unexpectedly rotate or slide against each other due to vibrations, shocks, etc. during mowing work, and the left and right Since the handles 17 and 18 are divided into two parts by the protrusion p, the mounting position of the handles can be adjusted separately for the left and right sides according to the slope of the land, unevenness, and the physique of the worker, reducing worker fatigue. It is also suitable for ensuring safe work, and the structures of the core metal 11, upper mounting bracket E, and lower mounting bracket F are not particularly complicated compared to conventional ones, so they are robust and inexpensive. It is possible to manufacture, and the core metal 11,
When assembling and disassembling the handles 17, 18, the upper mounting bracket E, and the lower mounting bracket F, there is no particular trouble, and the part that carries the load is the core metal 1.
1, the handles 17 and 18 are formed into a double structure, which can increase the strength and reduce the thickness of the handles 17 and 18, which can help reduce weight.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main part when the handle is fixed in the conventional case, Fig. 2 is an exploded perspective view of the main part when the handle is fixed in the present product, Fig. 3 is an enlarged sectional view of the assembly taken along the - line in Fig. 2, FIG. 4 is a view taken along the - line in FIG. 2. 11... Core metal, 14, 15, 16... Fastening tool,
17, 18...Handle, E...Top mounting bracket,
F...Lower mounting bracket, g, h...Recess, p...Protrusion, t, v...Notch.

Claims (1)

[Scope of utility model registration request] A handle fixing part for fixing the handle and an outer tube fixing part for clamping the outer tube are integrated in the middle of the outer tube, which has a prime mover at one end and a cutting blade driven by the prime mover at the other end. In the assembled brush cutter handle fixing device, the handle fixing portion abuts the ends of the pipe-shaped left and right handles 17 and 18, respectively.
A core metal 11 on which a protrusion p for restraining is formed, and the handles 17 and 18 that cover and fit the core metal 11.
An upper mounting bracket E and a lower mounting bracket F, each having notches t and v into which the protrusion p can be fitted are formed in the center of recesses g and h into which the upper and lower ends are respectively fitted.
and fastening devices 14, 15, and 16 for fastening the upper mounting bracket E and the lower mounting bracket F.