JPH0413935Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a blockage prevention device that prevents grass clippings from clogging the grass cuttings conveyance path that communicates the cutting part and the grass collecting part in a grass cutter. .

(b) Conventional technology Conventionally, grass mowers have been known in which the grass clippings cut by the cutting section at the lower part of the machine body are conveyed to the collection section at the rear of the machine body through a grass clippings conveying path using forced wind. It is. As an example, as shown in Japanese Unexamined Patent Application Publication No. 184315/1983, there is a system in which grass is forcibly conveyed from a mower below the machine body through a conveyance duct to a grass bag.

This type of mower has the advantage of saving the effort of separately collecting the cut grass from the surface of the ground after mowing.

(c) Problems to be solved by the invention However, when using this type of mower to cut wet materials such as green grass, the grass clippings tend to adhere to the inner wall of the grass clippings conveying path and gradually The grass may accumulate on the ground and block the grass clippings conveyance path, making it difficult to continue the mowing operation.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention aims to provide a device for preventing the grass clippings conveying path from being blocked in a grass cutter.

(d) Means for solving the problems The structure of the present invention to achieve the above purpose is as follows:
This will be explained with reference to FIGS. 1 and 2, which correspond to embodiments.

That is, unlike the conventional mower, the grass clippings cut by the cutting section 6 driven by the prime mover 7 are conveyed to the grass collecting section 10 through the grass clippings conveying path 18 by forced wind. no change.

The present invention is further characterized in that a vibration applying device 19 is provided which applies vibration to the grass clippings conveying path 18 using the power of the prime mover 7.

(e) Operation Most of the grass clippings made of wet material cut by the cutting section 6 are continuously conveyed by the wind to the grass collection section 10 through the grass clippings conveying path 18. However, because some of it is wet material, the grass clippings conveyance path 1
It adheres to the lower part of the inner wall of 8 and gradually accumulates.
However, during grass cutting work, the grass clippings transport path 1
8 is constantly vibrated without manual operation by the vibration imparting means 19 driven by power.
Once the grass clippings have accumulated to a certain extent, the grass clippings are forced to float at a rapid rate due to the vibrations of the grass clippings transport path 18, and are easily blown downwind by the wind. It does not accumulate more than a predetermined amount in the passageway 18, and flows down toward the grass collecting section 10 in one jump or in a pattern similar to a series of stepping stones. Note that it is not necessary to operate the vibration applying means 19 when cutting grass that is well dried.

(F) Embodiments Hereinafter, specific embodiments of the present invention will be described in detail based on the drawings.

1 and 2 show a side view and a plan view of the lawn mower according to the present invention. At the front of the machine body 1, there is a control unit consisting of a control handle 2, a control pedal 3, a seat 4, etc., and a control handle 2. front wheels 5, 5 that are steered by the machine, and a reaping section 6 that can be adjusted up and down relative to the machine body 1, and a rear part of the machine body 1 that receives power from a prime mover 7 via a transmission 8. Rear wheels 9, 9 and a grass collecting section 10 for transmission are provided.

The reaping section 6 consists of a rotary blade 11 that is rotated along the ground by the power of a prime mover 9 transmitted through a transmission device (not shown), and a circular cover 12 that surrounds the rotary blade 11 from above.
2 is formed with a grass clippings discharge port 13 that goes approximately tangentially from the periphery and diagonally upward and rearward, and the grass cut by the rotary blade 11 is discharged from the wind blowing plate 14 attached to the rotary blade 11... The grass clippings are vigorously discharged from the grass discharge port 13 by the wind generated by the grass clippings.

Further, the grass collection section 10 is installed in a projecting manner at the rear of the machine body 1, and includes a grass clippings receiving section 16 in which a receiving opening 15 is formed, and a grass clippings that is removably suspended from the grass clippings receiving section 16. The grass collection bag 17 consists of a bag 17, and the grass clippings received along with the wind from the receiving port 15 are stored in the grass collection bag 17, while the wind passes through the mesh of the grass collection bag 17 and is dissipated to the outside air.

Reference numeral 18 designates a grass clippings conveying passage that communicates the grass clippings discharge port 13 of the cutting section 6 with the receiving port 15 of the grass clippings receiving section 16, and the central portion thereof is made movable so as to apply vibration to substantially the entire portion. Ru. In this example, a telescopic and bendable bellows-shaped duct is used as the grass clippings conveying passage 18, so that the central portion thereof can be freely displaced back and forth and left and right. Of course, the structure of the grass clippings conveying path 18 is not limited to this, and for example, a normal pipe material may be used in the center and bellows pipes may be used only at both ends of the pipe material. good.

Up to this point, the mower is no different from a conventional mower, but the present invention further adopts the following configuration.

That is, a vibration imparting means 19 is provided to vibrate the grass clippings conveying path 18 vertically and horizontally. The vibration imparting means 19 includes a transmission device 21 for transmitting the power of the prime mover 7, which is appropriately branched from the transmission 8 etc., to the rotating shaft 20, a rotating body 22 fixed to the outer end of the rotating shaft 20, and a rotating body 22 fixed to the outer end of the rotating shaft 20. A pin 23 that is rotatably fitted into the rotating body 22, and the pin 23
It consists of a fixture 24 etc. for fixing. In addition,
Since it is sufficient that this vibration imparting means 19 is used only in the reaping work of wet materials, the transmission device 2
1 is provided with a power intermittent mechanism (not shown), or a power intermittent mechanism is provided at a stage before power is transmitted to the transmission device 21.

In FIG. 3, the pin 23 has a stepped portion formed at its tip and has a small diameter. Then, this tip is inserted into a through hole 25 bored at a position offset from the center of rotation of the rotating body 22, and a stopper 26 is detachably attached to the tip. The base of the pin 23 is connected to the grass clippings conveying path 1.
8 is welded to a fixture 14 that holds it. Note that if a lubricant such as grease can be injected into the sliding part between the pin 23 and the rotating body 22, smooth sliding between the two can be achieved. By interposing a ball bearing between them, the relative rotation between the two can be further smoothed out.

Here, the rotating shaft 20 of the vibration imparting device 19 is
When the power of the prime mover 7 is transmitted via the transmission 8 and the transmission device 21 to the rotating body 22, the rotating body 22 rotates.
Moreover, the pin 23 moves in a circular locus. As a result, the central part of the grass clippings conveying path 18 is periodically displaced vertically and horizontally, and this displacement spreads to the entire grass clippings conveying path 18, and as a result, the grass clippings conveying path 18 has an amplitude that varies depending on the location. The difference is that vibrations are forcibly applied to the entire body. Thus, the grass clippings conveyed from the cutting section 6 to the grass collecting section 10 through the grass clippings conveying path 18 are periodically floated up by the vibrations until they finish passing through the grass clippings conveying path 18. As the grass is forced to be fed by the wind, it can suitably reach the grass collecting section 10.

By the way, if the direction of rotation of the rotary body 22 is determined so that when the grass clippings conveying path 18 moves from below to above due to vibration, the grass clippings will be thrown up in the conveying direction, transportation of the grass clippings will be more suitable. It began to be carried out. That is, in this example, when the grass clippings are rotated in the direction of the arrow Q in FIG. 1, the grass clippings are subjected to not only the conveying force but also the force of flipping up the grass toward the grass collecting section 10 due to vibration.

Note that the rotating body 2 in the vibration imparting device 19
A cam mechanism in which 2 is replaced by a cam and the pin 23 is replaced by a slider does not pose any problem in achieving the effects of the present invention.

(g) Effects of the invention As described above, according to the invention, since vibration is applied to the grass clippings conveying passage 18 by the vibration imparting means 19 driven by power, the grass clippings are not transferred into the grass cuttings conveying passage 18. This makes it possible to suitably prevent blockages, and as a result, the worker's attention during work is not wasted on preventing the grass clippings transport path 18 from being blocked, so the work content can be improved more than before. It is simplified, which is preferable for improving safety during work, and there is no possibility that the grass clippings conveying path 1 would become blocked due to worker's carelessness as in the past.
Therefore, there is no need for restoration work in the event of a blockage, which has the advantage of improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a lawn mower according to the present invention, FIG. 2 is a plan view of the entire lawn mower, and FIG. 3 is a fragmentary sectional view showing a part of the vibration applying means. 6... Reaping section, 10... Grass collection section, 18... Grass clippings conveyance path, 19... Vibration imparting means, 22... Rotating body, 23... Pin.

Claims (1)

[Claims for Utility Model Registration] 1. In a grass mower that conveys grass clippings by wind pressure from the cutting section 6 to the grass collecting section 10 through a grass clippings conveying passage 18, part of the power of the machine body is used to convey the grass clippings through the grass clipping conveying passage 1.
A device for preventing blockage of a grass cut conveying passage in a grass cutter, characterized in that a vibration applying means 19 for applying vibration to the grass mower 8 is provided. 2. The vibration imparting means 19 fits the pin 23 fixed to the grass clippings conveying path 18 into a position offset from the center of rotation of the rotating body 22, which is driven by a part of the machine's power. A device for preventing blockage of a grass cut conveying path in a grass cutter as claimed in claim 1, characterized in that the device has a structure that is similar to the above. 3. A device for preventing blockage of a grass clippings conveying path in a grass cutter as set forth in claim 1, wherein the vibration imparting means 19 is formed by a cam mechanism.