JPH0135610B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a reaping machine having a cutting blade unit, which is a combination of a reciprocating working cutting blade and a stationary cutting blade, attached to the tip thereof, and This invention relates to a reciprocating mower used for cutting grass growing on a surface of the ground that forms a surface or an inclined surface, or for trimming the sides of shrubbery installed around a site, etc.

[Prior art and its problems]

Conventional reciprocating reapers have an engine fixed to one end of the main rod and a cutting blade drive housing fixed to the other end, and a cutting blade unit fixed to the cutting blade drive housing at a predetermined mounting angle. It was hot. When using the above-mentioned conventional reciprocating reaping machine, the worker places the hanging belt attached to the main rod over his shoulder, grasps the grip attached to the main rod, and swings the cutting blade unit along the ground surface. It was a thing to reap while doing so.

However, conventional reciprocating reapers are quite heavy, and this weight rests on the shoulders of the worker, and the high vibrations of the engine are transmitted to the worker's hands, making the work extremely difficult. Ta. Therefore, it was impossible or extremely difficult to continue working for a long time. Furthermore, when reaping work is carried out on slopes or other locations with poor footing conditions, the worker must work in an awkward position while working as one with the reaper, which can place the worker in an extremely dangerous situation. There were some drawbacks.

[Means for solving problems and their effects]

The present invention was developed with the aim of solving the drawbacks of the conventional reciprocating mower. The means adopted to achieve the above object is that a cutting blade drive housing driven by the engine is located at the front end of the main body frame to which the running wheels and the engine are attached, so that the main body frame is aligned with the center line of the longitudinal extension of the main body frame. It is provided so as to be rotatable so as to have a rotation center line,
An angle setting mechanism for fixing the cutting blade driving case to the main body frame at an arbitrary rotation angle is provided between the cutting blade driving case and the main body frame, and an angle setting mechanism is provided outside the cutting blade driving case. A cutting blade holder is provided along the directional extension center line, and a longitudinal plate-shaped cutting blade unit is removably attached to the cutting blade holder so as to be perpendicular to the longitudinal extension center line of the main body frame. A large number of pin-shaped passive ends are arranged at appropriate pitches along the longitudinal direction of the unit, and the cutting blade unit arbitrarily selects one of the large number of pin-shaped passive ends to move the cutting blade unit in the longitudinal direction of the main body frame. The rotary oscillation conversion is capable of repositioning in a direction perpendicular to the extension center line, and in which a oscillating link lever with a pivot located at an intermediate position of the cutting blade holder as a fulcrum projects outward from the cutting blade drive housing. The end is connected to a selected pin-shaped passive end of the cutting blade unit so that the operating cutting blade of the cutting blade unit is reciprocated.

According to the reciprocating reaping machine according to the present invention that employs the above-mentioned means (hereinafter referred to as the reaping machine of the present invention), when cutting grass growing on a flat ground surface, an operator can move the main body frame to Work can be carried out by manually pushing the attached long handle in a natural walking posture, or the running wheels are driven under automatic control, allowing the operator to reap by simply monitoring the driving status of the reaper of the present invention. You can also do that. Therefore, the burden on the operator is reduced, long-term reaping work can be done easily, and work efficiency is also improved. Also,
When cutting grass growing on a slope such as a bank or ridge, the reaper of the present invention is placed on the walking path at the top or foot of the bank or ridge, and the cutting blade drive housing and the mowing machine connected thereto are installed. Since the blade unit can be set at an angle along the slope to perform the reaping operation, the reaping operation can be performed in the same natural posture as when reaping on a flat surface. Furthermore, since the cutting blade unit can be repositioned in the longitudinal direction very easily, it can be used regardless of the width of the slope of the bank or ridge. Furthermore, when mowing the sides of shrubs and other shrubs around the site, set the cutting blade drive casing from a steady angle to a steep angle, and move the cutting blade unit closer to one end in the longitudinal direction. At the same time, it is possible to perform work while standing up at a desired cutting alignment angle.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. FIG. 1 shows an embodiment of the reaper of the present invention, and is a right side view with the cutting blade unit facing forward. In the figure, 1 is the main body frame. The main body frame 1 is made of a strong pipe, etc., and has an engine 2 attached to its rear end.
A wheel holder 4 is rotatably and slidably fitted near the center. The wheel receiver 4 can be fixed at a desired position on the main body frame 1 by tightening the fixing screw 27. Wheels 3, 3 and a long handle 5 are attached to the wheel holder 4. Although the main body frame 1 shown in FIG. 1 is of a hand-operated type, it is of course possible to use a self-propelled type in which the wheels 3, 3 can be controlled and driven by an engine 2 instead of this. A cutting blade drive housing 6 is provided at the front end of the main body frame 1.

The installed state of the cutting blade drive housing 6 is as shown in FIGS. 2 and 3. That is, the cutting blade drive housing 6 uses the center line A of the body frame 1 extending in the front-rear direction as the rotation center line.
It can be rotated as A' and fixed at any rotation angle position. The operation of setting and fixing the cutting blade drive housing 6 at an arbitrary rotation angle position is performed by the angle setting mechanism 7. The angle setting mechanism 7 is
It consists of a support part 8 which is tightened and fixed to the front end of the main body frame 1, and a tightening nut 9 which is fitted onto the support part 8. The tightening nut 9 is formed with an inner circumferential annular projection 9a that comes into contact with the rear end surface 8b of the central annular projection 8a of the support portion 8. In order to fix the cutting blade drive housing 6 to the main body frame 1, the cutting blade driving housing 6 is held at a rotation angle suitable for mowing on a flat ground surface or a sloped ground surface, or for aligning the mowing on the side of a planting. The rear end surface of the connecting portion 6a of the drive housing 6 is pressed against the front end surface of the central annular projection 8a in the support portion, and the tightening nut 9 is screwed onto the outer peripheral threaded portion 6d of the connecting portion 6a of the cutting blade drive housing 6. Just tighten it. Note that the rear end surface of the connecting portion 6a in the cutting blade drive housing 6 and the front end surface of the central annular projection 8a in the support portion 8 are provided with meshing teeth 6c along the radial direction of the rotation center line A'.
and meshing teeth 8c are provided radially at predetermined pitches to ensure secure fixation of the cutting blade drive housing 6 to the support portion 8.
The angle setting mechanism 7 is not limited to the illustrated embodiment, and any type may be used as long as it is provided at the front end of the main body frame 1 and can fix the cutting blade drive housing 6 at any rotation angle.

A small bevel gear 10 is pivotally supported 12 on the rotation center line A' at the connecting portion 6a of the cutting blade drive housing 6,
The front end of the transmission shaft 11, whose rear end is connected to the early engine 2 (see Fig. 1) and whose cross section is square, is the small bevel gear 1.
It is removably inserted into the shaft hole 10a of 0.
Moreover, a small bevel gear 1 is provided inside the cutting blade drive housing 6.
A large bevel gear 13 that meshes with the gear 1 is supported by a shaft 14.
Outside the cutting blade drive housing 6, a cutting blade holder 15 for a cutting blade unit 23, which will be described later, is attached to the bottom plate 6d via destands 15a, 15a, along the longitudinal extension center line A of the main body frame 1. It is attached. The cutting blade holder 15 has clamping pressure holding plates 20, 20 welded to both sides of the lower surface of the tip, and bolts 21, 2 that pass through the clamping pressure holding plates 20, 20.
1 is vertically installed from the bracket part 15b, and by tightening the nut 22, the cutting blade unit 2
The rear edge of the fixed blade 24 of No. 3 is clamped by the holding plates 20, 20.
It is configured to hold the clamping pressure.

In FIGS. 2 and 3, 16 is a reciprocating mechanism that transmits reciprocating driving force to the cutting blade unit 23. The reciprocating mechanism 16 includes a swinging link 17 and a pivot 1.
8 and a crank 19. Swing link 17
The boss portion thereof is erected at an intermediate position of the blanket portion 15b of the cutting blade holder 15, is supported by a pivot shaft 18, and is swingable on the upper surface of the cutting blade holder 15. A connecting long groove 15c for relaying the driving force is formed near the rear end of the swinging link 17, and a connecting long groove 15c for relaying the driving force is formed at the front end of the swinging link 17 to transfer the driving force to the cutting blade unit 2.
A transmission groove 16a is cut into the transmission slot 16a.
The rotational oscillation converting end of the crank 19, which is attached to the lower end of the output shaft 13a of the large bevel gear 13 built into the cutting blade drive housing 6 and projects outward from the cutting blade drive housing 6, is connected to the joint long groove 15c. 19a are slidably fitted and connected, and the other conductive split groove 16a is connected to a pin-shaped passive end 25a provided on the operating cutting blade 25 of the cutting blade unit 23. Therefore, when the output shaft 13a inside the cutting blade drive housing 6 rotates, the swinging link 17
The portion of the conduction split groove 16a in , reciprocates approximately along the radial direction B perpendicular to the rotation center line A', and as a result, the operating cutting blade of the cutting blade unit 23 repeats the reciprocating movement. . Note that the reciprocating mechanism 16 is not limited to the combination of the rocking link 17, the pivot 18, and the crank 19, and can of course be used as long as it is a mechanism that converts rotational motion into rocking motion. It is. For example, a cam mechanism (not shown) may be used.

The cutting blade unit 23 includes a fixed cutting blade 24 and a working cutting blade 25. That is, the working cutting blade has a plurality of cutting blade portions protruding forward from the front edge of a longitudinal plate-like base on a fixed blade 24 having a plurality of fixed blade portions protruding forward from the front edge of a longitudinal plate-like base. 25 are slidably stacked on top of each other. A plurality of pairs of connecting portions 24a, 24a are formed at appropriate pitches at the rear end of the fixed blade 24, each pair of connecting portions 24a, 24a being notched so as to correspond to the bolts 21, 21 of the cutting blade holder 15. Further, the reciprocating mechanism 16 is located near the rear edge of the upper surface of the operating cutting blade 25.
A pin-shaped passive end 25a corresponding to the conduction groove 16a of
The same number of sets are provided. The cutting blade unit 23
selects an arbitrary pin-shaped passive end 25a of the operating cutting blade 25 and connects it to the transmission groove 16 of the reciprocating mechanism 16.
a, and the connecting portion 24 of the fixed blade 24.
a, 24a to the clamping pressure holding plate 20 of the cutting blade holder 15,
20, it is held in the cutting blade holder 15 by tightening the nuts 22, 22. Therefore, the cutting blade unit 23 can be arbitrarily moved in a direction perpendicular to the center line A of the body frame 1 extending in the longitudinal direction at a predetermined vertical interval. Note that 26 in FIG. 1 is an auxiliary vehicle attached to the bottom plate 6d of the cutting blade drive housing 6 or the main body frame 1 as necessary. Further, 28 is a grass dividing plate attached to the cutting blade drive housing 6.

Next, the usage condition of the reaper of the present invention will be explained. When mowing is performed by traveling on a flat cutting ground, the cutting blade drive housing 6 is fixed to the main body frame 1 so that the cutting blade unit 23 is parallel to the axes of the wheels 3, 3. Next, when the engine 2 is started, the rotational output of the engine 2 is transmitted to the transmission shaft 11 and the small bevel gear 1.
0, is transmitted to the reciprocating mechanism 16 via the large bevel gear 13 and the crank 19, and is converted into a force that vibrates the conductive split groove 16a of the reciprocating mechanism 16, and is converted into a force that causes the pin-shaped passive end 25a of the cutting blade unit 23 to vibrate. transmitted to. In this way, the working cutting blades 25 of the cutting blade unit 23 perform a reciprocating motion to enable cutting. The operator performs the reaping work by manually pushing the handle 5 or by controlling and driving the running wheels 3, 3. If the fixing screw 27 (see FIG. 1) is loosened, the main body frame 1 will automatically rotate so that the cutting blade unit 23 follows the ground surface. Further, when mowing on the slope of the bank while running the reaper of the present invention on the bank, the fixing screw 27 is tightened and fixed, and the cutting blade unit 23 is moved to the slope of the bank as shown in FIG. The cutting blade drive housing 6 is rotated and fixed to the main body frame 1 so as to take an upward posture. In addition, the cutting blade unit 23
so that it protrudes a predetermined length on the slope of the ridge,
A predetermined set of connecting portions 24a formed on the fixed blade 24,
24a is the clamping pressure holding plate 20, 20 of the cutting blade holder 15.
Hold the clamping pressure in advance. Next, the engine 2 is started and the cutting blade unit 23 is moved along the slope of the ridge to cut the slope. Reaping of the sloped surface of the bank can also be carried out while the reaping machine of the present invention is running along the road at the foot of the bank. Of course, at this time, it is necessary to tilt the cutting blade unit 23 upward. In addition, when mowing the side surface of a grass field planted around the site, etc., the cutting blade drive housing 6 and the cutting blade unit 23 are rotated so that they are in an upright position relative to the support part 8 of the main body frame 1. After that, you can perform the reaping operation in the same way as in the above case.

〔Effect of the invention〕

As described in detail above, in the reaper of the present invention, the cutting blade drive housing can be set at any rotation angle and fixed to the main body frame. Moreover, the point where the cutting blade unit is connected to the cutting blade holder can be easily repositioned along the length of the cutting blade unit, allowing you to cut grass that grows on flat ground where the wheels can run. To easily and safely carry out not only work, but also cutting of grass growing on slopes that intersect with the ground on which the wheels run, and cutting and leveling the sides of shrubbery set up around the site, etc. It has an excellent effect that contributes to improving the efficiency of reaping work.

[Brief explanation of drawings]

Fig. 1 is a right side view showing an embodiment of a reciprocating mower according to the present invention, Fig. 2 is a bottom view showing the main parts of the above, Fig. 3 is a sectional view taken along the line - The figure is a front view showing a state of reaping work on an inclined surface. 1...Body frame, 2...Engine, 3...
Traveling wheel, 6...Mower blade drive housing, 7...Angle setting mechanism, 15...Mower blade holder, 17...Swing link, 2
3...Mower blade unit.

Claims (1)

[Claims] 1. In a reciprocating reaper, a cutting blade drive housing driven by the engine is located at the front end of the main body frame to which the running wheels and the engine are attached, and the cutting blade drive housing is driven by the engine, and the center line of rotation is the longitudinal extension center line of the main body frame. An angle setting mechanism is provided between the cutting blade driving housing and the main body frame to fix the cutting blade driving housing to the main body frame at an arbitrary rotation angle,
A cutting blade holder is provided on the outside of the cutting blade drive housing along the longitudinal extension center line of the main body frame, and the cutting blade holder has a longitudinal plate extending perpendicularly to the longitudinal extension center line of the main body frame. A cutting blade unit having the shape of a blade is removably attached to the cutting blade unit, and a large number of pin-shaped passive ends are arranged at appropriate pitches along the longitudinal direction of the cutting blade unit, and the cutting blade unit has a plurality of pin-shaped passive ends arranged along the longitudinal direction of the cutting blade unit. It is possible to arbitrarily select one of the main body frames and change the position in a direction perpendicular to the longitudinal extension center line of the main body frame, and a swinging linking rod with a pivot located at an intermediate position of the cutting blade holder as a fulcrum. A rotary oscillation converting end protruding outward from the cutting blade drive housing and a selected pin-shaped passive end of the cutting blade unit are connected to cause the operating cutting blade of the cutting blade unit to reciprocate. A reciprocating reaping machine characterized by: