JPS6328Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an improvement of a rotary mower that can also be used as a tether.

(b) Conventional technology Grass cutters (rotary mowers) that can also be used for tucking work are already known, for example, in Japanese Patent Application Laid-open No. 48-4222, and the conventional ones are as follows:
It is formed as a large-sized towing machine that is attached to a riding tractor, and more specifically, a plurality of carrying arms that extend radially from a rotary top that rotates on a vertical axis are equipped with a work tool that has a cutting function. When operating the work tool while maintaining it in a position substantially parallel to the ground, the overall rotational diameter is reduced and the work tool in a position substantially parallel to the ground enters the cutting position for cutting the grass; When the working tool is operated by changing its posture to be perpendicular to the ground, the overall rotational diameter is expanded and the working tool is configured to be in a position where it can perform tedging work with the vertically oriented working tool.

(c) Problems to be solved by the invention In order to change the working position, the conventional tool must be equipped with a mechanism that reduces or expands the rotating diameter of the carrying arm, and a mechanism that changes and maintains the position of the working tool. Because of this, the structure is extremely complicated, making it unsuitable for implementation on a walk-behind rotary mower with a simple configuration in which the reaping rotating section is placed close to the front of the running wheels.Especially, when the rotational diameter is large when in the tetsuding work position, This is an extremely large change, so in order to make this possible with a walk-behind rotary mower, the reaping rotating part would have to be installed quite far in front of the running wheels, which would require a large pilot. During cutting work, the tool with the cutting function is enlarged to a large diameter and rotates, so there is a risk that the tool will collide with other objects, damaging the cutting function and potentially causing personal injury. It may also happen, etc.
Various problems occur.

This invention focuses on the above-mentioned problems, and was implemented with the aim of solving them.It is a walk-behind rotary mower that can be used for both reaping and tetsuding work, and has a highly safe and simple structure. This is what we provide.

(d) Means for solving the problem That is, in the present invention, a rotary disk 7 is fitted and fixed to the reaping drive shaft 4 which is located near the running wheels 1 and is suspended from the machine body A. In a walk-behind rotary mower configured by detachably attaching the cutting blades 10 to a plurality of cutting blade attachment parts B arranged near the outer edge of the disk 7 using fasteners 9, the cutting blades 10 are removed. The cutting tool T is fixed to the cutting blade attachment part B in a state that the rotational outer diameter is not larger than the rotational outer diameter when the cutting blade is attached, and furthermore, at a position outside the rotational outer diameter of the cutting tool T and at the front in the direction of movement. A gauge wheel 19 whose vertical position can be freely changed and adjusted is attached to perform the tetsuding work.

(E) Function In the present invention, the cutting tool T can be set to the cutting working position simply by fixing the cutting tool T to the cutting blade attachment part B of the rotary disk 7 from which the cutting blade 10 has been removed. 4222), the overall structure is simple and compact because it does not require a mechanism to change the diameter of the tesding tool holder or a mechanism to change the posture of the tesding itself.
Moreover, even when the mower is in the teddying work position, the rotational diameter does not become larger than the rotational outer diameter during the reaping work, which together make it suitable for use in a walk-behind rotary mower. During the cutting operation, the cutting blade 10 is always removed, and the gauge wheel 1 is placed in front of the rotating cutting tool T in the direction of movement.
6 is located, the access prevention effect to the cutting tool prevents people from getting close to the cutting tool, allowing safe cutting work.Also, during cutting work, there is no cutting blade, so the cutting work can be done safely. This is possible.

(f) Examples Next, embodiments of the present invention will be described.

FIG. 1 is an overall side view of a walk-behind rotary mower in a reaping position, where A is the body, 1 is the running wheel, 2 is the engine, and 3 is the control handle.

Although it is not shown in the figure, a reaping drive case is installed at the front of the machine A near the running wheels 1.
The input shaft is interlocked and connected to the engine 2 by a suitable transmission means, and a reaping drive shaft 4, which is the output shaft of the reaping drive case, is installed vertically. Furthermore, a bracket 5 is installed at the front end of the body A to detachably support the base of the gauge wheel support frame 11.

A rotary disk 7 having a pop-up plate 6 on the upper surface is fitted and fixed to the reaping drive shaft 4 so as to rotate together with the reaping drive shaft, and a bowl-shaped free-rotating sled body 8 is attached to the lower side of the rotary disk 7. It is being

A plurality of cutting blade attachment parts B are provided near the peripheral edge of the rotary disk 7, which are distributed in the rotational direction of the rotary disk, and fasteners 9 can be inserted into the insertion holes of these cutting blade attachment parts B and tightened. The cutting blade 10 is removably fixed thereto.

Therefore, during reaping work, the gauge wheel is not attached and the machine A swings back and forth around the axis of the running wheels and tilts slightly forward, and the cutting height is set when the bowl-shaped sled body 8 touches the ground. When the rotary disk 7 is driven in this position to move the machine A forward, the cutting blade 10 cuts the planted pasture, and the cut grass is discharged to the side of the machine A by the splash plate 6. Therefore, the reaping work can be carried out.

Fig. 2 shows the entire rotary mower in a teddying working position. Then, a gauge wheel support frame 11 equipped with a gauge wheel 16 is attached to the bracket 5.
And an example of the tester T and its mounting structure is as follows.
An example is shown in FIG.

The illustrated tethering tool T has a spring material of an appropriate wire diameter provided with a winding part to form the attachment part, and both free ends 13, 13 extending from the attachment part facing downward to form a widening shape. A fastener (this fastener may be the same as the one used for attaching the mower blade or a dedicated one) can be used to attach the mower blade after it has been removed. It is attached to part B so as to hang down from the rotary disk 7. Note that the cutting tool T is provided with a rotating outer diameter that is not larger than the rotating outer diameter of the cutting blade when the cutting blade is attached.

Furthermore, the gauge wheel support frame 11 has a support tube 14 at its forward extending end, and a gauge wheel 16 is installed in the support tube 14 at the lower end of a support shaft 15 in a caster wheel structure. .

Therefore, in this case, by adjusting the height of the support shaft 15, the height above the ground of the rotary disk 7 to which the testing tool T is attached is set. When the machine body A is moved forward by driving the machine body A, the work of reversing and floating the grass clippings and spreading them will be carried out by the operation of the tucking tool T.

(g) Effects of the invention The present invention is equipped with a rotary disk 7 on the reaping drive shaft 4 installed vertically in front of the running wheels 1 of the machine body A, and a cutting blade 10 is detachably attached to the cutting blade attachment part B of the rotary disk 7. In the walk-behind rotary mower configured to be attached, the cutting tool T is fixed to the cutting blade attachment part B from which the cutting blade 10 has been removed, in a state that the outer diameter of rotation is not larger than the rotational outer diameter when the cutting blade is attached, and furthermore, the cutting tool T is fixed to the outer diameter of rotation when the cutting blade 10 is removed. The gauge wheel 16, which can be adjusted up and down, is mounted on the outer side of the radius and at the front in the direction of travel, so that it can be used for tetsuding work, so it can be used for both reaping and tetsuding work. Compared to the previous model, the structure was significantly simpler and more compact overall, making it suitable for use in small-sized walking rotary mowers, and providing good stability and safety for tethering work.

In other words, the present invention has a structure in which the cutting tool T and the cutting blade 10 can be exchanged and installed by commonly using the cutting blade attachment part B of the rotary disk while the rotary disk is still attached, which is not necessary in conventional machines. Since there is no need for a movable mechanism for changing the rotation diameter and tool posture, the structure is significantly simpler than the conventional one. Moreover, even if you change to the Tetsuding work position, the rotational outer diameter will not become larger than when in the reaping position, so the disk rotor can be installed in a fixed position close to the traveling wheels without any problems, reducing the pilot's time. It is compact and has good front-to-back balance, making it easy to maneuver in any working position. Furthermore, during testing work, a gauge wheel is positioned to guard the front of the advancing testing tool, and the installation of the gauge wheel adjusts and sets the height above the ground. This prevents things and people from getting close to each other unexpectedly, and also avoids accidents in which the treading tool collides with the ground, allowing for safe work.

[Brief explanation of the drawing]

Figure 1 is a side view of the rotary mower in the cutting position;
The figure is a side view of the rotary mower in a teddying working position, and FIG. 3 is an enlarged sectional view of the main part of FIG. 2. A...Body, B...Mower blade attachment part, T...Tetsuding tool, 1...Traveling wheel, 4...Reaping drive shaft,
7...Rotary disk, 10...Mower blade, 16...
...Gauge ring.

Claims (1)

[Scope of utility model registration request] A rotary disk 7 is fitted and fixed to a reaping drive shaft 4 that is located near the running wheels 1 and vertically installed from the machine body A, and a plurality of cutting blade attachment portions are provided near the outer edge of the rotary disk 7. In a walk-behind rotary mower configured by removably attaching a cutting blade 10 to B using a fastener 9, the cutting blade attachment part B from which the cutting blade 10 is removed has a diameter smaller than the rotating outer diameter when the cutting blade is attached. The tesding tool T is fixed in a state where it does not become too large, and a gauge wheel 16 whose vertical position can be freely changed and adjusted is attached at a position outside the rotational outer diameter of the tesding tool T and at the front in the direction of movement. A rotary mower characterized by: