JPH0422010Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a recoil starter operating device for a work machine.

(Prior Art) A power lawn mower that uses engine power to rotate a cutter in a horizontal plane and that moves by driving wheels is in practical use.

(Technical problem to be solved by the invention) In such a lawn mower, when the operating handle is mounted and supported in the center of the vehicle body with its base facing above the engine, the lawn mower cannot switch between forward and backward movement. Even if the handle is reversed to perform work in reverse compared to forward, the length and angle of the handle remain the same as when moving forward, making it easy to drive and operate.

By the way, when this type of work equipment is downsized, and when the starting mechanism is a simple recoil starter type with a vertical engine so that the work output shaft is vertical, the recoil starter is installed above the engine and attached to the handle base. , the rotation mechanism will be provided above the recoil starter. When such a configuration is adopted, the recoil starter is pulled and started by a rope in the horizontal plane, whereas the handle is at least reversed in the horizontal plane to match the forward and backward movement, and as a result of the handle being reversed, the direction of operation of the starter rope is at the base of the handle. There is no guarantee that a situation will occur where it is hidden behind the screen and difficult to operate. If the angle of the handle can be adjusted depending on the work or the worker, there is a risk that the base of the handle and the starter rope may become close to each other, making it difficult to operate the handle.

The present invention was developed to address the above-mentioned technical issues, and its purpose is to invert the handle,
Easy to pull start operation regardless of prone position.
Provided is a recoil starter operating device for a work machine that has excellent operability.

(Means for solving the technical problems) The means for solving the above technical problems is to provide an engine approximately in the center of the aircraft body, drive the wheels with the engine, and adjust the handle base above the engine by rotating, etc. In a work machine that can be mounted and supported, a recoil starter for starting is disposed above the engine, a handle base is mounted and supported above the recoil starter, the handle base is covered, and a part of the cover that moves integrally with the recoil starter is provided with a recoil starter. A locking member for pulling and guiding the rope for pulling the starter is provided, and the starting end of the rope is held and held by the locking member.

(Operation by the above means) According to the above means, the starting end of the rope is held and held by the locking member on the base cover which moves together with the handle even when the handle is reversed or prone.
No matter what condition the handle is in, the rope does not hide behind the base of the handle, and the handle does not get in the way of the pulling direction, making it easy to start pulling.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The embodiment will be described using a power lawn mower as an example, but the working machine is not limited to this and may be any arbitrary working machine.

Figure 1 is a side view of a power lawn mower 1, in which an engine 3 is mounted in the center of the machine body 2, two front wheels 4 consisting of rolling wheels are mounted on the front left and right, and drive wheels are mounted on the rear left and right. It has two rear wheels 5.

Figure 2 is a longitudinal side view of the main parts of the fuselage, with frame 6
The engine 3 consisting of a vertical engine with a crankshaft 301 running vertically is mounted on the top, and the inner 701 of the clutch mechanism 7 is connected to the output part 302 at the bottom of the crankshaft 301, and the bottom center part of the drum-shaped outer 702 is opened upward. A cutter drive shaft 801, which is vertically installed and hung vertically, is supported longitudinally by a bearing part 602 provided at the center of the bottom 601 of the frame 6, and the shaft 80
A cutter 8 is connected to the hanging extension part of 1.

Arms 603 are located at the front left and right of the frame 6.
A support 604 is horizontally mounted on the support 604, and support legs 605 are extended downwardly from both ends of the support 604, and the support shaft 401 of the front wheel 4 is supported at the lower part of the support legs 605.

The fuselage 2 consists of a frame 6 and a housing 9, and the housing 9 is open at the front and rear 901, 902.
Then, the bottom is opened 903, and the side plates 904 are placed on the left and right.
Further, an upper plate 905 is provided on the top, and door plates 906 and 907 that can swing freely in the front and rear are provided.

A pulley 10 is loosely supported on the upper part of the output section 302, and a pulley 11 supported by a vertical support shaft 111 is disposed behind the pulley 10, and a belt 1 is connected between the pulleys 10 and 11.
2, and a small-diameter friction roller 112 is coaxially provided integrally with the upper half of the pulley 11. An intermediate drive shaft 13 is horizontally mounted above the support shaft 111, and a pair of friction disks 1 are mounted on the intermediate drive shaft 13, movable only in the axial direction.
4 and 15 are fitted, and the roller 112 is placed between them. The inner 701 engages with the outer 702 at a predetermined engine speed, thereby driving the cutter 8 to rotate in a horizontal plane, and as the body 2 moves, grass (grass) enters from either the front or rear openings 901, 902. The grass is cut with the cutter 8, and the grass is discharged backward in the direction of movement. The extension part 101 of the pulley 10 engages with the outer 702, and therefore rotates together with the outer 702, driving the pulley 11 via the belt 12, and the engagement of the roller 112 with one of the disks 14 and 15 causes this pulley to rotate. The shaft 13 is driven to rotate in this direction, and by selecting the disks 14 and 15, the shaft 13 is switched between forward and reverse rotation.

Arms 606 are extended to the left and right rear of the frame,
The bases of the left and right reduction cases 16 are connected to this, and the support shaft 50 is attached at the bottom of the reduction case 16.
1 supports the rear wheel 5, while a sprocket 17 is fixed to one end of the shaft 13, and a sprocket 19 is provided at the end of the final drive shaft 18, which is horizontally suspended between the cases.
The sprockets 17 and 19 are connected by a chain 20, and pinions (not shown) provided at both ends of the shaft 18 are meshed with internal gears provided inside the wheels 5 (not shown) to transmit the output of the shaft 13 to the wheels 5. Forward/reverse drive.

In the above process, the base of the handle 21 is mounted and supported above the engine 3 disposed in the center of the fuselage 2.

The mounted state of the handle is shown in FIG. 3. In FIG. 3, reference numeral 303 indicates a cooling fan fixed to the upper end of the crankshaft 301, on which a known recoil starter 304 is provided.
04 includes a pulley 305, an operating rope 306 wound around it, a return spring 307, a starting engagement pawl 308, etc., and the pulley 305 is supported by a support shaft 309 provided coaxially with the crankshaft 301. Axis 309 is vertical. Therefore, the pulley 305 rotates around the shaft 309 in a horizontal plane by the rope tension, and the pawl 308 pops out and the fan 303
engages the side and performs starting. These fans 303,
The recoil starter 304 is covered with a cover 311 placed over a case 310.

The cover 311 has a wide lower part 312 and becomes smaller in diameter at the recoil starter 304 to form a cylindrical intermediate part 313, and a cylindrical cap-shaped top part 314 with a smaller diameter is provided on top of this. A cover piece 315 is provided.

The above-mentioned handle 21 is supported at its base above the engine above the recoil starter 304 so as to be rotatable in a horizontal plane, and to be movable up and down in a side view. An example of such a rotation and vertical angle adjustment mechanism will be explained with reference to FIGS. 3 and 4. The base pipe 22 is fixedly attached to the fixed-side cover piece 315 described above, and the cover piece 315 holds the pipe 22. Vertical cylinder part 3
16, and this part provides the axial length of the pipe to support it. A support pipe 23 is fitted to the pipe 22 so as to be rotatable in a horizontal plane, and a shaft 24 is horizontally suspended on the upper part of the support pipe 23, and the base 21 of the handle 21 described above is
1 is supported by the shaft 24 so as to be rotatable up and down.
A fan-shaped regulating piece 2 is provided on one side of the handle base 211.
5 is fixedly installed, and teeth 251 are provided on the outer periphery of the regulating piece 25.

On the other hand, at the upper end of the base pipe 22, the lid piece 315
A semicircular immovable regulating piece 26 is fixed on the top,
Teeth 261 are provided on the outer periphery of this. A support piece 27 is provided at the middle lower part of the support pipe 23 side, and the engager 28 is supported by this support piece 27.
is a fan-shaped regulating piece 25 that is L-shaped in side view and plan view.
The upper part has teeth 281 that engage with and disengage from the teeth 251 of the lower part, and the lower part has teeth 282 that engage with and disengage with the teeth 261 of the lower semicircular regulating piece 26 in plan view. These teeth 281,
The engager 28 with 282 is connected to the pusher 30 by the spring 29.
is urged in the engaging direction by the cable 31, and the engaging element 28 is removed from the regulating pieces 25 and 26 by pulling the cable 31.
As a result, the teeth 251, 261, 281, and 282 are disengaged, and the handle 21 can be rotated up and down about the support shaft 24 and in a horizontal plane by the support pipe 23 fitted to the base pipe 22. . Therefore, the handle 21 can be rotated up and down and in the horizontal plane at a position above the center of the fuselage above the engine, and can be locked and held at any vertical angle or rotational angle in the horizontal plane by the mechanism.

By the way, the cylindrical support member 32 is fitted around the top 314, and the bottom opening 3 of the dish-shaped lower cover 33 is placed on top of the cylindrical support member 32.
31 is fitted, and on the other hand, a seal plate 34 is interposed between the lid piece 315 and the regulating piece 26, and the peripheral part 341 of the seal plate 34 is bent and hung down in a ring shape, and a ring-shaped bent part around the opening 331 is formed. 332, and a locking piece 333 bent outward is provided at the upper end of the lower cover 33. On the other hand, a flexible body is provided around the base 211 of the handle 21,
For example, a top cover 35 made of rubber is placed on top. The cover 35 has a thick lower peripheral edge 351, an annular groove 352 on the inner periphery that engages with the locking piece 333, the lower outer periphery of this is tightened with a band 353, and a part of the upper part has a handle 21 attached to it. An opening 354 is provided through which the rear portion 212 of the base is led out, and the mechanism portion is covered with covers 33 and 35. In addition, the upper cover 35 is attached to the handle 21.
In order to rotate together with the support piece 27, a part of the support piece 27 described above is extended 271, and this is connected to a part of the thick base of the cover. According to the above, the upper cover 35 rotates together with the upper cover 35, and the seal is attached to the engaging portion 35 of the lower cover 33.
No. 2,333, the cover bends when adjusting the vertical angle, and the mechanism part is not exposed.

In the above, on the outside of the upper cover 35 that covers the adjustment mechanism for rotating and supine the base 211 of the handle 21, there is a locking guide member that holds the tension starting end of the rope 306 of the recoil starter 304 and guides the tension of the rope 306. 36 will be provided. In the embodiment, the member 36 is formed to cover 1/4 of the circumference of the cover 35,
As shown in Fig. 3, a hanging piece 36 is provided in a part with strength as a horizontally curved channel-shaped cross section that is open outward.
1 is fastened 37 to a thick mounting portion 355 at the bottom of the cover 35 using rivets, screws, or the like. A cylindrical part 362 is provided at the front end of the member 36, and the inner diameter of this part is sufficiently larger than the diameter of the rope 306.
is curved and expanded to serve as a guide portion for smooth movement of the rope, and the front portion 364 is also curved and expanded in the same way. The rope 306 is attached to the cylindrical portion 362.
The starting end 306a is passed through and a knob 37 is attached to the end.The knob 37 is larger than the inner diameter of the cylindrical part, and the knob 37 is attracted or once held in this part.

In the above case, in the state shown in Fig. 4, pull the knob 37 to the right to pull the rope and start.
When the handle is reversed, that is, when the handle faces to the left in the figure, the member 36 of the knob 37 is reversed in this direction together with the cover 35, and the knob is pulled to the left to pull the rope and start the engine. In this case, since the front and rear portions of the cylindrical portion 362 of the rope are curved and enlarged in diameter, the edges do not touch even in this direction, so that the rope can move smoothly without damaging the rope.

(Effects of the invention) As is clear from the above, according to the invention, even if the handle is reversed or the handle is turned upside down, the rope locking guide member is provided on the base cover that moves together with the handle. The starting end of the rope for operation is locked and held, and the rope does not hide behind the base of the handle or get in the way of the operation direction under any condition of the handle, and the pull starting operation is maintained at all adjustment stages of the handle. A work machine that is well secured and has excellent starting operability is selected.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the work machine, Fig. 2 is a vertical side view of the main parts, Fig. 3 is a longitudinal side view of the handle mechanism, and Fig. 4 is a side view of the working machine.
The figure is a plan view of the same. In the drawing, 2 is a fuselage, 3 is an engine, 4 and 5 are wheels, 21 is a handle, 304 is a recoil starter, 306 is a rope, 35 is a cover, and 36 is a tension guide locking member.

Claims (1)

[Scope of utility model registration request] In a working machine, an engine is provided approximately in the center of the machine body, the engine drives wheels, and a handle base is mounted and supported above the engine so as to be rotatable and adjustable,
A recoil starter for starting is arranged above the engine, and a handle base is attached and supported above the recoil starter, and a part of the cover that covers the handle base and moves integrally with the handle base is a tension guide for a rope for pulling the recoil starter. A recoil starter operating device for a work machine, comprising a locking member for locking and holding a starting end of the rope.