JPH0677484B2 - Fully detecting structure of grass collection bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a collecting turf that is hung and supported by a mower provided on a riding-type traveling machine body and hung on a machine-side frame via a focusing duct. A grass bag full detection structure in which grass grass is discharged and guided from an upper lateral side to an upper opening of the grass bag, and a full detection sensor is provided for the grass bag. Regarding

[Conventional technology]

As a full detection structure for this type of grass collection bag, conventionally, a transport ventilation path has been established from the discharge port of the grass clippings to the discharge port to the outside of the bag through the grass clippings storage section in the grass collection bag. By providing an air volume sensor at this outlet, the air volume corresponding to the transport air volume will change to the air volume sensor part of the outlet when the storage amount in the grass clippings storage part in the grass collection bag has not reached the specified amount. After passing, when the storage amount reaches the specified amount, the discharge port is blocked by the storage turf, and the amount of conveyed air passing through the air volume sensor portion is drastically reduced. It has been decided to catch the time when the amount of conveyed air has decreased and to judge that it has become full, and to carry out a predetermined process (Japanese Patent Laid-Open No. 63-24814).

[Problems to be Solved by the Invention]

In the one that passes the inside of the stored lawn grass once and guides the transport air to the discharge port, when the lawn is wet with rain and dew, it is densely packed, and when the degree of dryness is high, it is rough. Since they are collected at various densities, the amount of air conveyed through the lawn is different even if they are the same, and if they are collected at a coarse density, the amount of air conveyed does not decrease and the full state cannot be detected. was there.

As shown in FIG. 1, the light emitting diode (19) and the photo sensor (20) are placed at the full detection position of the grass collection bag (8) without adopting an unstable method such as using the air flow rate. It is conceivable that an optical sensor or ultrasonic sensors such as an ultrasonic transmitter and a receiver may be arranged to detect a full grass clipping, but in reality, the grass collection bug (8) is located along with the grass clippings. A lot of dust grass and other dusts brought in are suspended, and these block light and ultrasonic waves or adhere to the light emitting surface and the transmitting surface, causing malfunctions, and these sensors are also difficult to use. It is a thing.

An object of the present invention is to make it possible to detect the full state with high accuracy regardless of the harvested grass density and without being affected by suspended matter such as scrap grass.

[Means for Solving the Problems]

According to the characteristic configuration of the present invention, in the full detection structure of the grass collection bag described at the beginning, the full detection sensor is configured by a contact type sensor, and the full detection sensor is disposed in the cover covering the upper opening of the grass collection bag. Located on the windward side of the tip of the grass collection duct and on the side of the upper edge of the grass collection bag, and in contact with the cut grass storage part at the upper lateral side of the grass collection bag that swells in a full state The above-mentioned features and effects are as follows.

[Action]

The grass clippings are discharged and guided through the grass collection duct, and the grass clippings compartment of the grass bag, which is made of a soft material such as cloth or soft resin, faces outward depending on the volume of the grass cut. Swell to.
Then, a full detection sensor that operates by contacting the bulging part of the grass clippings storage part of the grass collection bag is installed on the windward side of the tip of the grass collection duct that is inserted into the cover that covers the upper opening of the grass collection bag. And, since it is arranged at the side surface of the upper end of the grass collection bag, that is, the position where the grass clippings are sequentially stacked from the lower side in the bag and the lower side in the cutting grass discharge direction, and finally the stacking guide is carried out. As compared with the case where it is simply provided at the upper end of the grass collection bag, the certainty of the full detection operation is improved.

Further, since the fullness detection sensor is configured to act on the grass clippings storage part at the side surface at the upper end of the grass collection bag, the fullness detection sensor is used when the grass collection bag is removed to discharge the full grass clippings. Does not interfere with work.

〔The invention's effect〕

The swelling amount of the grass collection bag, which depends on the volume occupied by the collected grass, is detected, and it is possible to reasonably detect the full condition at the position where the grass clippings are finally blocked in the grass collection bag. The full state can be detected accurately regardless of the change in the product density, and stable detection operation can be expected without being affected by floating waste grass, and it does not adversely affect the grass bag attachment / detachment work. We have been able to provide a full detection structure.

〔Example〕

As shown in FIG. 2, the riding lawn mower includes a downward output shaft engine (1) at the front of the machine body, a mission case (2) at the rear of the machine body, and a driving operation unit (3) between them. A mid-mount mower (7) between wheels (5) and (6), and an external turning type grass-grass guiding the grass clippings from this mower (7) to a grass-collecting baag (8) connected to the rear end of the airframe. It is configured by providing a duct (9).

The grass collection bag (8) will be described. An E-shaped support frame (12) in a plan view is attached to a pipe bracket (11) extending rearward from the rear end of the traveling body (10), and the grass collection bag (8) is attached to the support frame (12). Is configured to be placed. This grass collection bag (8) has a base (8
A meshed grass lawn storage section (8B) made of a soft resin is wound around A) and is supported by being suspended, and the support frame (12) is supported by a mouthpiece (8A).

On the other hand, a grass collection duct (9) mount (13) is erected at one lateral end of the support frame (12), and the mount is installed in the recess (9a) on the grass collection duct (9) side. The platform (13) is fitted and locked to support the grass collection duct (9). On the other hand, at one end of the cover (14) for the grass collection bag (8), the grass collection duct (9) supported by the mounting base (13) is pressed down, and the cover (14) and the mounting base (13) collect the grass. It is arranged to support the grass duct (9).

The grass clippings cut by the mower (7) are guided and guided through the grass collection duct (9) by the wind force generated by the rotating force of the mower (7), and the grass collection bag (8).
It is discharged and supplied to the upper opening formed by the mouthpiece (8A) and is stored inside the grass collection bag (8).

Next, the mounting structure of the fullness detection sensor (15) will be described. The fullness detection sensor (15) is located on the windward side of the tip of the grass collecting duct (9) that is inserted into the cover (14) that covers the upper opening of the grass collecting bag (8) and at the upper end of the grass collecting bag. It is installed so as to come into contact with the upper part of the grass clippings storage part (8a) of the grass collection bag (8) that swells in the side part of the grass. That is, as shown in FIG. 1, at the upper side portion along the cutting lawn discharge direction by the grass collection duct (9) in the support frame (12) as the body side frame,
The mounting bracket (16) is fixed, the limit switch (17) is rotatably supported on the upper surface of the mounting bracket (16) and the sensor bar (18) is rotatably supported on the lower surface of the mounting bracket (16), and the lower side (18a) of the sensor bar (18) is supported. Is urged against the grass clippings storage (8B) from the outside, and the upper side (18b) of the sensor bar (18) is arranged to act on the limit switch (17). Therefore, as shown in the drawing, in the empty state, the sensor bar (18) pushes the cut grass storage section (8a) inward, and when the storage area of the cut grass progresses and the cut grass storage section (8a) begins to swell, the sensor bar ( The upper side (18b) of the sensor bar (18) comes into contact with the limit switch (17) when the sensor bar (18) is pushed back and is full. Above, the sensor bar (18) and the limit switch (17) are referred to as a full detection sensor (15). In this way, when fullness is confirmed, an alarm is issued to notify the operator.

The position where the sensor bar (18) acts is set to a portion that bulges in the lateral direction and has a large bulging amount depending on the weaving direction of the cut grass storage portion (8a).

[Another embodiment]

The fullness detection sensor (15) may be a piezoelectric element, a conductive rubber, or the like that senses the expansion output when the grass clippings storage (8a) is full as pressure.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a grass bag fullness detecting structure according to the present invention. FIG. 1 is a vertical sectional front view showing a mounting state of a fullness detecting sensor, and FIG. 2 is a side view of a riding lawn mower. (7) …… Moore, (8) …… grass collection bag, (8a) ……
Grass clippings compartment, (9) …… grass collecting duct, (12) …… machine side frame, (14) …… cover, (15) …… full sensor.

Claims (1)

[Claims] 1. A grass collection bag in which grass clippings mowed by a mower (7) provided on a riding-type traveling body are suspended and supported by a body side frame (12) via a grass collection duct (9) ( 8), the grass collecting bag (8) is configured so that the grass clippings are discharged and guided from the upper lateral side to the upper opening of the grass collecting bag (8), and a full detection sensor (15) is provided for the grass collecting bag (8). A fullness detection structure for a grass collection bag, wherein the fullness detection sensor (15) is a contact type sensor, and the fullness detection sensor (15) covers the upper opening of the grass collection bag (8). (14) on the windward side of the tip of the grass collection duct (9) that is arranged in a rush manner, and
The grass collection bag (8) is arranged on the side surface at the upper end,
A full grass bag detection structure which is configured to come into contact with the grass clippings storage (8a) at the upper lateral portion of the grass bag (8) which swells in a full state.