JP2526266Y2 - Opening and closing mechanism of grass collection box of lawn tractor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn tractor for collecting grass cut by a mower suspended on the abdomen of a body of a traveling vehicle such as a tractor into a grass collection box at the rear of the body.

[0002]

2. Description of the Related Art Conventionally, a mower is hung on the abdomen of a body of a tractor or the like, a grass collecting box is mounted on a rear portion, and a thrower (chute) is interposed between the mower and the grass collecting box. A lawn tractor having a structure in which turf cut off by the above is collected in the grass collection box through a thrower is known. For example, in Japanese Utility Model Laid-Open No. 61-92245, the grass collection box can be opened and closed by lever operation, and an open / close detection switch for detecting box opening / closing is provided along with the lever operation, and the switch detects a box open state. The structure is such that the tractor travel stop device is sometimes activated.

[0003]

When the grass collection box is arranged at the rear of the tractor in this way, the visibility behind the grass collection box is poor, and the rear view becomes insufficient. In such a situation, it is necessary to open and close the box. If it does, it is very dangerous if it is done when driving the tractor, especially when traveling in reverse. In the prior art, the tractor traveling stop is linked to the opening and closing of the grass collection box. However, when further safety is required, the opening / closing device of the grass collection box is operated after confirming the stop of the tractor, rather than stopping the tractor based on opening / closing of the grass collection box. It is desirable. In addition, if the grass collection box is opened and closed when the mower is driven, there is a possibility that the lawn grass blown from the mower is blown out at once.

[0004]

The present invention uses the following means to solve the above problems. On a lawn tractor with a mower suspended on the abdomen of the tractor and a grass collection box attached to the rear,
Mower clutch switch that turns ON when
Connect the brake switch that turns on when the key pedal is depressed, the switch for opening and closing the grass collection box, and the actuator for opening and closing the grass collection box, respectively, to the control circuit, and collect only when the mower clutch is disconnected and the brake pedal is depressed. The grass box can be opened and closed.

[0005]

When the key switch KS of the tractor is turned on, the brake switch BS is turned on when the brake pedal is depressed, and the mower clutch switch MS is turned on when the mower clutch is disengaged. When the grass box open / close switch S is pressed, the motor M of the actuator of the grass box is driven and the electric cylinder 11 is operated to open the grass box 2.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention; FIG. 1 is a side view of a lawn tractor equipped with a mower and a weeding box, FIG. 2 is a side view of an opening and closing portion of the weeding box of the present invention, FIG. 3 is a view showing an arrangement of a brake switch, and FIG. FIG.
FIG. 6 is a block diagram of the grass collection box opening / closing control of the present invention, FIG. 6 is a side view showing the arrangement of the grass fullness detection switch in the grass collection box, FIG. 7 is a plan view thereof, and FIG. FIG. 9 is a block diagram showing another embodiment, and FIG. 10 is an electric circuit diagram of another embodiment of opening and closing a grass collection box.

FIG. 1 shows a mower 1 on the abdomen of a lawn tractor.
, The grass collecting box 2 is mounted on the rear part, the thrower 3 is installed on the side of the mower, and the grass is thrown into the grass collecting box 2 from the thrower 3 through the chute 4. The mower 1 is suspended by links 5a and 5b back and forth so as to be able to ascend and descend to obtain power from the engine E of the tractor, and one or a plurality of cutters 1a vertically provided at a lower portion in the case of the mower 1 are provided. The cutter is rotated and the cut grass is sent to the thrower 3 by the rotation of the cutter. The cut grass is blown out from the thrower 3 and is sent into the grass collecting box 2 through the chute 4.

A steering handle 7 is provided at the front of the driver's seat 6, a brake pedal 8 is projected from the foot, and a speed change lever 9, a mower clutch and an elevating lever 10 are provided at the sides. I have. A grass collection box open / close switch S is provided near the driver's seat.

As shown in FIG. 2, the shape of the grass collection box 2 is such that the movable box 2b is pivotally supported at the upper part of the fixed box 2a, and the movable box 2b is rotated to open the lower part, so that the collected grass can be collected. Release. An electric cylinder 1 that expands and contracts when a grass collection box opening / closing switch S is turned on as an opening / closing actuator.
The movable box 2b is rotated by the contraction of the cylinder, and the box is opened. M is a motor built in the electric cylinder 11. The actuator may be constituted by a hydraulic cylinder.

As a control switch for the grass box opening / closing actuator having such a structure, in addition to the grass box opening / closing switch S, as shown in FIG.
A brake switch BS that is turned on when the brake pedal is depressed is additionally provided. Further, as shown in FIG. 4, a mower clutch switch MS that is turned on when the mower clutch is disengaged is attached to the mower clutch and the lifting / lowering lever 10. The switches arranged in this way are connected to the controller 20 as shown in FIG. 5 to constitute a grass collection box opening / closing mechanism. That is, if the brake switch BS is turned on and the mower clutch switch MS is not turned on in the running / working state by the key switch KS, the electric cylinder is operated even if the grass collection box opening / closing switch S is turned on. The motor M is not driven. With this configuration, the grass collection box 2 can be opened only when mower driving is stopped and the tractor is stopped, thereby improving safety. However, when the grass collecting box 2 is opened and closed by the hydraulic cylinder, the solenoid SO is operated to switch the switching valve so that the hydraulic cylinder expands and contracts. Further, as shown in FIG. 10, a circuit configuration may be made by connecting the brake switch BS, the mower clutch switch MS, the grass collection box opening / closing switch S, and the electric cylinder operating motor M in series.

Next, the configuration of the grass fullness detection switch FS in the grass collection box 2 will be described. Conventionally, the fullness of turf in the weed collection box has been detected by making the chute transparent and observing the flow of turf in the chute or by the occurrence of turf clogging in the chute or thrower. . In this case, in the latter case, it is necessary to remove even the clogging of the turf in the chute, and for that purpose, the operator needs to get off the driver's seat and perform the removal work. Also, in the former case, the detection of fullness tends to be delayed because it relies on visual recognition, and in many cases the grass is clogged in the chute.
The turf fullness detection switch FS is for detecting the expiration of the turf before the turf in the grass collection box 2 becomes full and the turf is clogged in the chute 4, and issues an alarm to the operator. .

First, since the mounting position of the switch is to detect the full amount, the switch is located at an upper position in the grass collection box 2.
It is necessary to be near the exit of the chute 4 in the box and at a position that does not impair the flow of turf. Therefore, as shown in FIGS. 6 and 7, the chute 4 is located slightly below and at the side of the outlet. The configuration of the switch is such that it is turned on by the pressure of the collected grass G, for example, as shown in FIG. 8 or FIG. By connecting the lawn fullness detection switch FS and the buzzer BZ to the control circuit 20, the lawn fullness detection switch FS is connected to the control circuit 20.
Is turned on and the buzzer sounds so that the worker is notified of the full capacity as soon as possible.

[0013]

[Effects of the Invention] The present invention has the following effects by being configured as described above. That is, even if the grass collection box is opened and the grass grass case is to be released, and the grass grass case open / close switch is turned on, the brake pedal is depressed,
Further, since the box is opened only when the mower clutch is disengaged, the box is not opened even if the open / close switch is pressed by mistake when driving the tractor or driving the mower, thereby improving safety.

[Brief description of the drawings]

FIG. 1 is a side view of a lawn tractor equipped with a mower and a grass collection box.

FIG. 2 is a side view of the opening and closing unit of the grass collection box of the present invention.

FIG. 3 is a diagram showing an arrangement of a brake switch.

FIG. 4 is a diagram showing an arrangement of a mower clutch switch.

FIG. 5 is a block diagram of the grass collection box opening / closing control of the present invention.

FIG. 6 is a side view showing an arrangement of a lawn fullness detection switch in a grass collection box.

FIG. 7 is a plan view of the same.

FIG. 8 is a configuration diagram of a lawn level detection switch.

FIG. 9 is a configuration diagram showing another embodiment.

FIG. 10 is an electric circuit diagram of another embodiment of opening and closing a grass collection box.

[Explanation of symbols]

 BS Brake detection switch MS Mower clutch detection switch S Grass collection box opening / closing switch 1 Mower 2 Grass collection box 10 Mower clutch and up / down lever 11 Electric cylinder 20 Control circuit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiro Suetsugu 428 Enami, Okayama City In the company of Seirei Industrial Co., Ltd. (56) References JP-A-5-7414 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A lawn tractor in which a mower is hung on the abdomen of a tractor and a grass collection box is mounted on a rear part thereof.
More clutch switch that turns ON when the more clutch is released
And the brake switch that turns on when the brake pedal is depressed
, And a grass box opening / closing switch and a grass box opening / closing actuator are connected to a control circuit, respectively.
A grass box opening / closing mechanism for a lawn tractor, wherein the grass box can be opened and closed only when the mower clutch is disengaged and the brake pedal is depressed.