JPS6242664Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a prime mover via a clutch housing at the proximal end of a long handle tube, a rotary blade at the tip via a gear housing, and a clutch mechanism and a long handle from the prime mover. Regarding a throttle operating device in a bush cutter that drives a rotary blade through a driven long shaft inserted into a shaku handle tube and a gear mechanism,
More specifically, the present invention relates to a throttle operating device for a brush cutter that utilizes a grip provided on a long handle tube.

In conventional brush cutters, the throttle is operated, that is, opened and closed, by a handle-type lever installed in the grip (note: installed in the long handle tube at the tip of the grip). This was being done.

However, with such handle-type levers, the throttle operation must be done with four fingers other than the thumb, which makes the grip unstable and the rotating blade rotates from side to side. This has caused accidents to occur, especially when working on slopes or other adverse conditions. Also, because it is a handle-type lever, it protrudes greatly toward the outer circumference of the long handle tube, so when changing the angle of the rotary blade to the left or right diagonal (note, depending on the work conditions, the rotary blade may may be used by changing the angle vertically, horizontally, etc.) The lever will come into contact with the waist,
For right-handed people, when the rotating blade is tilted to the right,
For left-handed people, the opposite is true when they fall down. ) In this case, the worker often separates the long handle from the waist, which makes holding the handle unstable, which is undesirable. (In addition to gripping, this is done with the grip in contact with the waist.) In order to firmly hold the grip, the grip must be gripped that strongly, which has the disadvantage of increasing fatigue.

Furthermore, since the lever and its hinge metal fittings protrude in the conventional device, it is not suitable for packaging, storage, transportation, etc.

This idea was created by focusing on the points mentioned above.
The purpose of this is to make it possible to operate the throttle controller with only the thumb while holding the grip firmly with the palm and all four fingers except the thumb, and therefore to be able to operate the throttle control with only the thumb. To provide a throttle operation device for a brush cutter that can safely perform the following operations.

Another object of the present invention is that the operation piece of the throttle operator does not protrude greatly in the outer circumferential direction such as up, down, left and right of the long handle tube, and even when the angle of the rotary blade is tilted in the up, down, left and right directions. To provide a throttle operating device for a brush cutter that does not require separating a long handle tube or grip from the waist, allows the user to always work in a comfortable posture, and reduces fatigue accordingly.

In order to solve the above-mentioned drawbacks and achieve the above-mentioned purpose, the present invention includes a grooved wheel section rotatably supported by a guide fitting via a plate spring and to which a throttle wire is tightly connected, and an outer periphery of the grooved wheel section. The slotted wheel part of the throttle operator, which consists of an operating piece part bent at right angles from the tip of a protruding plate part extending in one direction from a part of the long handle pipe, is attached to the long handle pipe through a band fitting provided on the guide fitting. The grip is mounted parallel to the longitudinal direction, and the operating piece formed on the groove wheel is close to the upper front part of the grip fitted and fixed to the long handle tube, and is perpendicular to the longitudinal direction of the long handle tube. It is characterized by being arranged as follows.

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a long handle tube, 2 is a driven long shaft inserted into the long handle tube 1, and the relationship between the two and the prime mover,
Since the structure related to the rotary blade etc. is the same as that conventionally known, a detailed explanation thereof will be omitted. 3 is a grip fitted onto the long handle tube 1 and tensioned by a coil spring 4; 5 is a throttle operator; 6 is a guide fitting; 7 is a band fitting; the throttle operator 5 is connected to a groove wheel portion 5a; , consists of a projecting plate part 5b extending in one direction from a part of the outer periphery of the groove wheel part 5a, and an operation piece part 5c bent in a right angle direction from the tip of the projecting plate part 5b, and the groove wheel part 5a is connected to the guide metal fitting 6. It is rotatably mounted on a shaft 9 via a leaf spring 8. Further, one end of the guide metal fitting 6 is fixed to the band metal fitting 7. and throttle operator 5
When the operating piece 5c is close to the upper part of the front part of the grip 3 and perpendicular to the longitudinal direction of the long handle tube 1, the band fitting 7 is wrapped around the long handle tube 1 and the bolt nut 10 is closed. It is being tightened.

Reference numeral 11 indicates a throttle wire, and reference numeral 12 indicates a wire tube.The tip of the throttle wire 11 is tied and wound around the groove wheel portion 5a of the throttle operator 5 via a fastener 5d, and the other portion is wound around the wire tube. 12 so as to be slidably inserted therein.
Furthermore, the wire tube 12 is fitted into a groove 3a formed on one side of the grip 3.

In the configuration described above, the groove wheel portion 5a is rotated by placing the thumb on the operating piece 5c of the throttle operator 5 while holding the grip 3 and pushing the operating piece 5c by a desired amount. This rotation operates the throttle via the throttle wire 11 in the direction of opening by a desired amount. The open state of the throttle is maintained by the leaf spring 8. Also, throttle operator 5
The throttle is closed by pulling toward the front.

As mentioned above, the present invention has the throttle operator 5.
When the operating piece 5c is close to the upper part of the front part of the grip 3, the groove wheel part 5a bent at right angles to the operating piece 5c is connected to one part of the long handle tube 1 via the guide fitting 6. Since it is fixed parallel to the side, the operating piece 5c is necessarily located perpendicular to the length direction of the long handle tube 1, and therefore the grip 3 can be used to remove the palm and thumb. The throttle operator 5 can be operated via the operating piece 5c using only the thumb while firmly grasping with four fingers;
In addition, since the operating piece 5c does not protrude greatly in the outer circumferential direction of the long handle tube 1, such as up, down, left, right, etc., even when the rotary blade is tilted in the up, down, left, and right directions, the grip 3 or the long handle tube 1 can be easily moved. There is no need to separate the long handle tube 1 from the waist, that is, the long handle tube 1 can be held in a comfortable posture with the grip firmly gripped at all times, which has the effect of reducing worker fatigue. It is possible to achieve the above-mentioned intended purpose well.

[Brief explanation of drawings]

The drawings show an embodiment of the throttle operating device for a brush cutter according to the present invention, and FIG. 1 is a plan view, and FIG.
The figure is a side view of the same as above, and FIG. 3 is an end view of FIG. 1 viewed from the - line. DESCRIPTION OF SYMBOLS 1... Long handle tube, 3... Grip, 5... Throttle operator, 5a... Groove wheel part, 5b... Projection plate part, 5c... Operating piece part, 6... Guide metal fittings.

Claims (1)

[Scope of utility model registration request] A groove wheel part is rotatably supported by a guide fitting via a leaf spring and has a throttle wire tied thereto, and a projecting plate part extending in one direction from a part of the outer periphery of the groove wheel part. A grooved wheel portion of a throttle operator consisting of a bent operating piece portion is attached parallel to the longitudinal direction of the long handle tube via a band fitting provided on the guide fitting, and an operating portion formed on the grooved wheel portion is attached. Throttle operation in a brush cutter, characterized in that one part is disposed close to the upper front part of a grip that is fitted and fixed to a long handle tube and perpendicular to the longitudinal direction of the long handle tube. Device.