JPS5930570B2 - walk-behind tiller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a walk-behind cultivator, and more particularly to a safety device in a rotary device connected to the main body.

The above rotary device is covered with a cover to prevent tillage mud from scattering and to prevent workers' feet from accidentally entering the rotary device and causing contact injuries. Not enough to avoid it.

In other words, by adjusting the tillage depth of the rotary device, etc.
There is an opening between the lower edge of the cover and the mud surface, and a worker who slips into this opening may accidentally enter the opening, or the same may occur when the rotary device is lifted and rotated. This occurs noticeably.

For this reason, conventionally, it has been considered to solve the above problem by configuring the upper and lower positions of the lower edge of the cover to be freely adjustable, but it is difficult to reliably close the opening, and it is difficult to adjust the tilling depth. It is troublesome to adjust the cover every time the height is adjusted.

Therefore, the present invention aims to provide a walk-behind cultivator that can reliably solve the above problems and improve safety.

Embodiments of the present invention will be described in detail below based on illustrative drawings.

FIG. 1 shows a front frame 1 equipped with an engine E, and a pair of left and right drive wheels 2, which receive power from the engine E.
A walk-behind cultivator in which a rotary device B is removably connected via a rear hitch 5 of a main body A, which consists of a mission case 3 on the machine side that transmits power to the main body 2, and a control handle 4 that controls the operation of the machine. A power transmission belt 6 is wound between the engine E and the transmission case 3, and a tension boob 〇-7 that approaches and moves away from the belt 6 is provided so that the output of the engine E is transmitted to the transmission case 3. The main clutch 9 is configured to transmit the power to the case 3 to drive the wheels 2, 2, and further to turn on and off the drive of the rear rotary device B via the transmission case 8.

Further, behind the rotary device B in the moving direction of the aircraft,
A rotary cover 10 made of a hard plate material is pivotally suspended by a hinge connection so as to be swingable back and forth, and a projecting piece 11 is provided on the cover as shown in FIG.

The protruding piece 11 and the main clutch lever 18 of the main clutch 9 are interlocked and connected via a contact interlocking mechanism 12 described below, and the rotary device B of the rotary cover 10 is connected to the main clutch lever 18 of the main clutch 9. In conjunction with the approaching rocking displacement,
It is configured to disengage the main clutch 9 by swinging the main clutch lever 18 toward the disengaged side.

That is, the swinging link of the abutment interlocking mechanism 12 is constituted by the swinging link 13 pivotally mounted to the pinch connection body 22 of the rotary device B and the swinging link 15 pivotally mounted near the hitch 5 of the main body A. 13 is connected to the projecting piece 11 of the rotary cover 10 via a wire 14, and the swingable link 15 of the abutment interlocking mechanism 12 is pivotally connected to the steering wheel 4, and has a C-shape. The main clutch lever 18 is connected via a wire 17 to the main clutch lever 18, which is trouble-connected so as to be held on the input side of the main clutch 9 via the link 21, and the rotary cover 10 approaches the rotary device B by a certain amount or more. Accordingly, the main clutch lever 18 is swung toward the cutting side.

The main clutch lever 18 and the main clutch 9 are connected to each other via a wire 19 and a spring 20.
6 is swung along with the swiveling operation of the lever 18, and the clutch is operated.

(Refer to Fig. 3) According to the above configuration, when the worker's foot or the like that has slipped comes into contact with the rotary cover 10 during work and the rotary cover 10 is swung toward the rotary device B side, the contact occurs. Main clutch lever 18 via interlocking mechanism 12
swings toward the cut side, the main clutch 9 is disengaged, and the drive of the rotary device B is stopped.

In this state, the disengaged state of the main clutch 9 will be maintained until the main clutch lever 18 is operated again to the engaging side.

In the embodiment of the present invention, a tension type clutch is illustrated as the main clutch 9, but the same method can be applied when a multi-plate clutch type, a meshing type, etc. are provided in the mission case 3. It is possible.

□And the main clutch 9 and rotary cover 10
As shown in the example, the main clutch lever
18, as shown in FIG.
The swinging link 15 and the tension arm 16 are connected by wire 2.
3 may be connected and operated directly.

In summary, the walk-behind cultivator according to the present invention has a rotary cover 10 attached to the rear of the rotary device B, which is removably attached to the hitch 5 of the walk-behind cultivator body A, in a manner that it can swing back and forth. The rotary cover 10 and the main clutch 9 of the main body A are connected to a swinging link 13 attached to the hitch coupling body 22 of the rotary device B, and a swinging link 15 attached to the hitch 5 of the walking cultivator main body A. The main clutch 9 of the main body A is disengaged when the rotary cover 10 approaches the rotary device B side by a certain amount or more. The operator's foot or the like that has slipped unexpectedly approaches the rotary device B side and comes into contact with the rotary cover 10, causing the rotary cover 1 to
0 is oscillated over a certain range, the main clutch 9 is disengaged and the drive of the rotary device B is stopped, which reliably prevents the worker's feet from coming into contact with the rotary device B and getting caught in the injury. It is.

According to the present invention, even if the main clutch 9 is disengaged,
Since engine E is not stopped, engine E is not stopped when driving again.
Another advantage is that there is no need to call back.

Furthermore, according to the present invention, since the contact interlocking mechanism 12 provided at the rotary mounting pitch portion is used to interlock the rotary cover 10 and the main clutch 9, it is not necessary to connect the rotary device B to be attached or detached. This has the advantage that the above-mentioned safety function can be immediately exerted, and the connection can be easily achieved in a desired interlocking state without requiring any special interlocking operation at the time of connection.

Furthermore, when working with plows, pressure rollers, etc. that are not very dangerous, connected to the cultivator main body, there is an advantage that unnecessary safety devices of the rotary device can be removed together with the rotary device.

[Brief explanation of the drawing]

The drawings show an embodiment of the walk-behind cultivator according to the present invention, and the first
The figure is an overall side view, FIG. 2 is a schematic explanatory diagram showing the transmission structure between the main clutch and the rotary cover, and FIG. 3 is a schematic explanatory diagram of another embodiment. 5...Hitsuchi, 9...Main clutch, 1
0... Rotary cover, 12... Contact interlocking mechanism, 13... Swing link, 15...
... Swinging link, 22 ... Pitch connection body,
A: Main body, B: Rotary device.

Claims (1)

[Claims] 1. A rotary cover 10 is attached to the rear of the rotary device B, which is removably connected to the hitch 5 of the walk-behind cultivator body A, in the direction of movement of the machine body, and is swingable back and forth, and the rotary cover 10 and the main clutch 9 of the main body A , rotary device B
A swinging link 13 attached to the hitch connecting body 22 of the walk-behind cultivator body A and a swinging link 15 attached to the hitch 5 of the walk-behind cultivator main body A are interlocked and connected via an abutment interlocking mechanism 12. A walk-behind cultivator characterized in that the main clutch 9 of the main body A is disengaged in conjunction with the rocking displacement of the cover 10 towards the rotary device B side beyond a certain level.