JPS6314035Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a throttle lever device that is installed at the end of a handle or the like that holds a brush cutter and is used to operate a throttle device of an engine.

Conventionally, a throttle lever is rotatably pivoted inside a cover-shaped support provided close to a grip that fits into the end of a tubular handle, and one end is connected to the throttle lever. However, in a throttle lever device equipped with a throttle wire that passes through the inside of the handle and connects the other end to the throttle device, when starting the engine, hold the engine with one hand and press the recoil starter with the other hand. Due to the pull, the throttle lever could not be grasped and held in place. For this reason, a locking mechanism is required to lock the throttle lever in a predetermined position. Conventionally, this locking mechanism involves, for example, a slidable pin that locks the lever and The structure was complicated, such as having to be reset by a machine, the number of parts increased, and assembly work was complicated, which meant that it could not be manufactured at a low cost.

The present invention is a bendable locking device that is provided with a push button portion on the outer surface and covers an opening in a part of the side wall of a support body made of an elastic material such as synthetic resin that supports the throttle lever in a freely swingable manner. One side of the plate is integrally fixed to this side wall, and the throttle lever is provided with a locking part that detachably locks with a locking piece provided at the other end of the locking plate, The locking plate is provided to hold the throttle lever at a predetermined swinging position with the locking plate curved inward, and the locking plate is biased so that the locking piece retracts outward from the locking portion. To provide a throttle lever device that has a simple structure, can be manufactured at low cost, can securely hold a throttle lever in a predetermined position, and is easy to operate. It is something.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

1 to 6, reference numeral 1 indicates a brush cutter, and a support case 5 rotatably supports the cutting blade 3.
and the engine 7 are connected by a connecting rod 9.
Reference numeral 11 denotes a grip part made of rubber or the like that is directly fixed to the connecting rod 9, 13 is a tubular handle that is fixed to the connecting rod 9, and grip parts 15, 17 made of rubber or the like are provided on the outer peripheral surface near the right and left ends, respectively. are fitted and fixed.
19 is a throttle lever device, which is constructed as follows. That is, reference numeral 21 denotes a cover-shaped support made of synthetic resin that is fixed to the end of the handle 13 in close proximity to the grip portion 15, and the handle 13 is held in place by a bolt 25 that tightens the cut portion 23.
27 is a throttle lever pivotally attached to the support body 21 by a shaft 29 so as to be swingable toward the grip portion 15;
It is provided along the grip portion 15. 31 is the second
As shown in FIG. 6 and FIG.
The throttle lever 27 is formed in such a shape that it enters inward from the outer peripheral surface of the grip portion 15 when the throttle lever 27 swings toward the grip portion 15 . Reference numeral 33 denotes an arm fixedly provided in the support body 21 as a part of the throttle lever 27, and is provided in a direction substantially perpendicular to the axial direction of the handle 13, and has an engagement hole 35 at the end. It is provided. 37 is a throttle wire whose one end is engaged with the engagement hole 35 by a locking piece 39, and whose other end is interlocked with a throttle device (not shown) of the engine 7. 40 is a cutout at the tip of the arm 33; 41
is a notched groove provided at one side end divided by the cut portion 40, through which the throttle wire 37 is passed when the engaging piece 39 is attached to the engaging hole 35. 43 is a stopper, which is constructed as follows. That is, a bendable locking plate 46 is formed by fixing one side of the support body 21 to the side wall of the support body 21.
A push button portion 47 is provided to protrude to the outside,
It is provided to cover an opening opening in a part of the side wall of the support body 21. Reference numeral 49 denotes a locking piece provided at the other end of the locking plate 46 of the stopper 43, and the button 47 is pressed with a finger when the arm 33 is in a predetermined swing position (for example, a position suitable for starting the engine 7). By pushing in the locking part 46, the arm 33
The arm 33 engages with the locking part 51 on the lower surface of the end
It is held in the swing position. Locking plate 46
The locking piece 49 is biased outwardly by elastic force so as to retreat from the locking portion 51. Note that the locking portion 51 may be provided on the upper part of the arm 33.

In the above embodiment, to start the engine 7, first, grasp the throttle lever 27 and swing it toward the grip part 15, and then press the push button part 47 to push the stopper 43 inward. Then, when you release the throttle lever 27,
The locking portion 51 of the arm 33 engages with the locking piece 49 of the stopper 43, and the throttle lever 27 is moved to the third position.
As shown in the figure, it is held at a predetermined rocking position suitable for starting the engine 7. Next, pull the starter handle (not shown) to start the engine 7, grip the grips 15 and 17 with your right and left hands, respectively, and then grip the throttle lever 27, so that the locking portion 51 is engaged. The stopper 43 is detached from the stopper 49 and returns to its original outward position by its own elastic force, and the throttle lever 27 becomes in a state where it can freely swing. Therefore, the rotation of the engine 7 is adjusted by operating the throttle lever 27 in accordance with the state of the work, while mowing grass, etc., is performed using the rotating cutting blade 3.

In addition, when operating the throttle lever 27, when the throttle lever 27 is swung in the direction of the grip part 15, the throttle lever 27 sinks into the notch 31 of the grip part 15 and moves inwards from the outer peripheral surface of the grip part 15. The throttle lever device 19 can be easily held and the throttle lever device 19 can be made compact.

Since the present invention has the configuration as described in the claims, it has a simple structure, a small number of parts, can be manufactured at low cost, and can secure the throttle lever at a predetermined position. It can be easily operated.

[Brief explanation of drawings]

Fig. 1 is a perspective explanatory view of a brush cutter equipped with a device according to the present invention, Fig. 2 is a side sectional view of one embodiment of the present invention, Fig. 3 is a front sectional view of main parts, and Fig. 4 is another example. FIG. 5 is a side view of the main part, and FIG. 6 is a plan sectional view of the main part. Explanation of symbols representing main parts of the drawings, 13...
...Handle, 15...Grip part, 21...Support body,
27... Throttle lever, 37... Throttle wire, 46... Locking plate, 47... Push button portion, 49... Locking piece, 51... Locking portion.

Claims (1)

[Scope of utility model registration request] A grip part 1 that fits into the end of a tubular handle 13
A throttle lever 27 is pivotably mounted inside a cover-like support 21 provided adjacent to the throttle lever 27.
and one end is connected to the throttle lever 27,
In a throttle lever device including a throttle wire 37 that passes through the inside of the handle 13 and connects the other end to the throttle device, a throttle wire 37 that covers an opening opening in a part of the side wall of the support body 21 made of an elastic material. One side of a bendable locking plate 46 having a push button portion 47 on its outer surface is integrally fixed to the side wall, and the throttle lever 27 is provided with:
A locking portion 51 is provided to removably lock with a locking piece 49 provided at the other end of the locking plate 46, so that the throttle lever 27 can be held in the position in which the locking plate 46 is curved inward. is provided to be held at a predetermined swinging position, and the locking plate 46 is biased so that the locking piece 49 is retracted outward from the locking portion 51. Tutle lever device.