JPH03159885A - Throttle adjusting mechanism of walking type managing machine - Google Patents

Abstract

PURPOSE:To enhance the operability by arranging the handle column fixation side base part of an outer tube of a bonding wire and the fixation side tip of a handle lever so that they confront each other at a center pin part, coupling the ends of their inner cables with a throttle operating lever and a throttle lever, and interlocking the two motions. CONSTITUTION:A lock mechanism 17 is operated previously, and a plate lock pin 19 is moved against the action of a spring and fitted in a lock hole 153 formed in an interlocked plate 15, and a handle lock lever 12 is operated. Then a handle lock pin 11 is disengaged from a lock hole 141. After lifting a handle lever 7, the handle lock pin 11 is protruded again and fitted in this lock hole 141. Thereby upward motion of the handle lever 7 causes approach of outer tubes 29, 30 with the aid of movement of the interlocked plate 15, and a throttle operating lever 22 makes interlocked motion. Thus the operating easiness is enhanced.

Description

[Detailed Description of the Invention] A. OBJECTS OF THE INVENTION (1) Industrial Field of Application The present invention relates to a walking management machine having a pair of left and right handlebars which are attached to the tip of a handle column to be operated by an operator so as to be vertically adjustable.

(2) Prior Art As shown in Figure 1, a walking management machine T is equipped with a management machine main body 3 supported by left and right running wheels 2 driven by an engine 1. The engine 1 is located at the rear.
A rotor 4 serving as a working machine driven by a rotor 4 is rotatably mounted. A handle column 5 is fixed to the upper part of the management machine main body 3, facing the opposite side of the rotor 4, that is, toward the front of the management machine main body 3, and at the tip of the handle column 5 there are grips 6, 6 for the operator to grasp. A pair of left and right handlebars 7.7 are mounted on a center pin 8 so as to be vertically adjustable.

The ridge-building work using the walking type management machine T is performed in the following steps.

■ The engine 1 drives the running wheels 2 and rotor 4, and while the worker is moving backwards, the walking-type management aT moves straight ahead to erect the ridges.

■ When you reach the end of the ridge, throttle engine 1 to reduce speed.

■ Raise the handlebars 7, 7 from the position shown by the solid line to the position shown by the chain line, centering on the center pin 8.

■ Push down the handle har-7.7 with both hands to lift the rotor 4 off the ground, change the direction of the walking management machine T, and move it to the next ridge.

■ Relax your hands and let the rotor 4 touch the ground.

■ Lower the handlebars 7 and 7 again to the solid line position.

■ Open the throttle and start ridge raising.

(3) Problems to be Solved by the Invention By the way, in the conventional walking type management machine T, it was necessary to repeat the steps (1) to (2) above every time the terminal of the ridge was reached, and the operation was extremely complicated.

The present invention has been made in view of the above-mentioned circumstances.
, ■, and procedures ■ and ■ at the same time, the purpose is to improve the operability of a walking management machine.

B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the throttle adjustment mechanism of the present invention adjusts the handlebar up and down via a center pin at the tip of the handle column provided in the main body of the control device. In a walking type management machine, which is pivotably supported in a position adjustable manner, and in which a throttle operating lever provided on the handlebar and a throttle lever of an engine mounted on the management machine body are connected by a Bowden wire,
The outer tube of the board wire is divided into a base outer tube fixed to the handle column and a tip outer tube fixed to the handlebar, and the ends of both outer tubes are opposed to each other at the upper or lower part of the center bin. , both ends of an inner cable inserted through the outer tubes are tied to the throttle operating lever and the throttle lever, respectively, and the ends of the outer tubes are brought closer to each other or separated from each other as the handlebar moves to the raised position, The throttle lever is driven in the closing direction by moving the inner cable relative to the base outer tube.

(2) Function According to the above-described feature of the present invention, when the handlebar is in the normal lowered position, the inner cable 6 inserted into the outer tube of the Bowden wire is operated by the throttle operation lever provided on the handlebar. When driven, the throttle lever connected to this inner cable moves to control the engine output. When the handlebar of the walk-behind control machine is moved to the raised position, the distance between the opposing ends of the base outer tube fixed to the handle column and the tip auctube fixed to the handlebar becomes closer or farther apart, causing the inner cable to The throttle lever is moved relative to the base outer tube to push or pull the throttle lever so that the engine throttle is automatically throttled as the handlebar moves to the raised position.

(3) Examples Embodiments of the present invention will be described below based on the drawings.

Figures 1 to 5 show one embodiment of the present invention.
The figure is an overall perspective view of the walking management machine, Figure 2 is an enlarged perspective view of its main parts, Figure 3 is an enlarged cross-sectional view of the locking mechanism, and Figure 4 is an enlarged perspective view of the main parts.
The figure is an explanatory diagram of the action when the handle bar and the throttle lever are in an interlocked state, and FIG.

As shown in FIG. 2, a pair of left and right handlebars 7.7 can be vertically swung by a center pin 8 disposed horizontally at the tip of a handle column 5 provided on the management machine main body 3 of the walking management machine T. is installed on. Left and right handle par 7
．． 7 are connected by a connecting member 9, and a handlebar hook pin 11 is attached to a guide member 10 fixed at the center of the connecting member 9.
is supported so that it can freely slide forward and backward. A handle lock lever 12 is provided at the rear end of the right handle par 7, and the handle lock lever 12 and the handle lock pin 11 are connected by a Bowden wire 13.

On the other hand, can the handle lock pin l1 fit into the rear end of the handle column 5? A lock bracket 14 having lock holes 14, 14■ is fixed thereto. Therefore, if the handle lock lever 12 is grasped and the handle lock pin 1l is removed from the lock hole 141.14■, the handlebars 7, 7 can freely swing up and down about the center pin 8. Become.

Then, the corresponding lock hole 141.1 is either in the lowered position shown in solid lines in FIG. 1 or in the raised position shown in chain lines.
When the handle lock pin 11 is engaged with the handlebar 4, the handlebars 7, 7 are fixed in that position.

An interlocking plate 15 that is rotatable along the right side of the handle column 5 is pivotally supported on the center bin 8 . The interlocking plate 15 is made of a pressed plate material, and a stopper 151 formed by bending the lower part of the interlocking plate 15 is attached to the handle column 5.
A torsion spring 91 is attached to the center pin 8 so as to be in contact with the lower surface of the center pin 8. 6. A locking mechanism 17 for fixing the interlocking plate 15 is provided on the outer surface of the right handle par 7. As shown in FIG. 3, the lock mechanism 17 includes a plate lock pin 9 which is biased rearward by a spring 32 inside a cylindrical casing 18. The part 20 is formed on the side surface of the casing 18.
It protrudes outward from the letter-shaped guide groove 181. On the other hand, a bent portion 15■ formed at the rear of the interlocking plate 15 has a lock hole 1 into which the plate lock bin 19 can be fitted.
53 is in full form. Therefore, by moving the operating part 20 forward along the guide groove 18, the plate lock pin 19 is projected forward from the casing l8 and fixed to the interlocking plate 15t-handle par 7.7, and the plate lock pin 19 is fixed to the interlocking plate 15t-handle par 7.7. The interlocking plate 15
10? It can be made to move around the body.

A throttle operating lever 21 provided at the front end of the right hand handlebar 7 and a throttle lever 24 which is pivoted on a support shaft 22 on the management machine body 3 and is biased by a spring 23 in the direction of closing the throttle are connected by a Bowden wire 25. By operating this throttle operating lever 21, the throttle lever 24 swings and the output of the engine 1 is controlled. The outer tube of Bowden wire 25 is
A base outer tube 29 is installed along the side of the handle column 5 and has both ends fixed to a bracket 26 provided on the management machine main body 3 and two brackets 27 and 28 provided on the handle column 5, and a right handle part. 7 and formed on the interlocking plate 15, and the tip outer tube 30 fixed to the bent portion 15, and the inner ends of both outer tubes 29 and 30 are connected to the They face each other with a gap at the upper part of the center pin 8. On the other hand, both ends of the inner cable 31 inserted through the outer tubes 29 and 30 are connected to the throttle operating lever 21 and the throttle lever 24, respectively.

Next, the operation of the embodiment of the present invention having the above-described structure will be explained.

When the throttle lever 24 is to be interlocked with the raising and lowering of the handlebar 7.7, the locking mechanism 17 is actuated in advance so that the plate lock pin 19 is moved against the spring 32 and the interlocking plate is moved. l5 lock hole 15
, and fit it in.

From this state a, operate the handle lock lever 12 to force the handlebar lock pin 1l into the lock bracket 14 in the lower lock hole 14. Remove it from the handlebar 7.
7 to the position shown in FIG. 4(b), the handle lock pin 11 is again projected and fitted into the lock hole 142 on the upper side of the lock bracket 14. As described above,
When the handlebar 7.7 moves to the raised position, the interlocking plate 15 also swings together against the torsion spring 16, and the bracket 154 formed on the interlocking plate 15 approaches the bracket 28 formed on the handle column 5. do. As a result, the distance between the opposing ends of both the outer tubes 29 and 30 becomes closer, and the other end of the inner cable 31, whose one end is tied and fixed to the throttle operating lever 22, is connected to the base outer tube 2.
9, the elastic force of the spring 23 causes the throttle lever 24 to swing, and as a result, the output of the engine 1 is reduced.

On the other hand, the lifting and lowering of the handlebar par 7.7 and the throttle lever 2
4, the plate lock pin 19 of the lock mechanism 17 is removed from the lock hole 15133 of the connecting plate 15, as shown in FIG. 5(a). When the handlebars 7, 7 are moved from this state to the raised position shown in FIG.
Due to the resilient force, the stopper I5I is held in a position where it abuts against the lower surface of the handle column 5, and the distance between the opposing ends of both outer tubes 29, 30 remains unchanged. As a result, the inch cable 31 and the base outer tube 29 do not move relative to each other, and the position of the throttle gear 24, that is, the output of the engine 1, is maintained in its original state.

Although the embodiments of the present invention have been described above in detail, the present invention is not limited to the embodiments described above, and various small design changes may be made without departing from the scope of the invention described in the claims. It is possible to do so.

For example, in the embodiment, by arranging the opposing ends of the tip outer tube 30 and the base outer tube 29 above the center pin 8, the inner cable 31 is connected to the base outer tube 29 when the handlebar 14-7.7 is raised. On the other hand, although the outer tubes 29 and 30 are projected toward the throttle lever 24 side, the opposite ends of the outer tubes 29 and 30 may be arranged below the center pin 8. If this is done, the inner cable 31 will move to pull the throttle lever 24 when the handlebar 7.7 is raised, so the connection relationship between the throttle lever 24 and the throttle may be changed accordingly.

C. Effects of the Invention As described above, according to the present invention, when the handlebar that is pivotally supported on the handlebar column is moved to the raised position, the base outer tube fixed to the handlebar column side and the tip outer tube fixed to the handlebar side are separated. As the distance between the opposing ends approaches, the inner gable inserted inside both outer tubes moves relatively, and the throttle lever connected to this inch cable is driven, automatically reducing the engine output. . Therefore, there is no need to operate the throttle control lever to reduce the engine output each time the handlebar is moved to the raised position, and it is possible to significantly improve the operability of the walking management machine.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention.
The figure is an overall perspective view of the walking management machine, Figure 2 is an enlarged perspective view of its main parts, Figure 3 is an enlarged cross-sectional view of the locking mechanism, and Figure 4 is an enlarged perspective view of the main parts.
The figure is an explanatory diagram of the action when the handlebar and the throttle lever are in an interlocked state, and FIG. 5 is an explanatory diagram of the action when the handlebar and the throttle lever are in a non-interlocked state. DESCRIPTION OF SYMBOLS 1... Engine, 3... Control unit body, 5... Handle column, 7.7... Handlebar, 8... Center pin, 21... Throttle operating lever, 24...
Throntle lever, 25... Bowden wire, 29... Base outer tube, 30... Tip outer tube, 3 1... Inner cable

Claims (1)

[Claims] Handlebars (7, 7) are pivoted to the tip of a handle column (5) provided on the management machine main body (3) via a center pin (8) so that the vertical position can be adjusted freely. (7, 7
) and a throttle lever (24) of the engine (1) mounted on the management machine main body (3) are connected by a Bowden wire (25), wherein the Bowden wire Base outer tube (29) with outer tube (25) fixed to handle column (5)
and the tip outer tube (30) fixed to the handlebars (7, 7), and both outer tubes (29, 30).
) are opposed to each other at the upper or lower part of the center pin (8), and both outer tubes (29
, 30) are respectively tied to the throttle operating lever (21) and the throttle lever (24), so that both ends of the inner cable (31) inserted through the handlebars (7, 7) are connected to the throttle operating lever (21) and the throttle lever (24). The inner cable (31) is moved relative to the base outer tube (29) by moving the ends of the outer tubes (29, 30) toward or away from each other, thereby driving the throttle lever (24) in the closing direction. A throttle adjustment mechanism for a walking management machine.