JPS5818670Y2 - Safety devices in work equipment - Google Patents

Description

[Detailed description of the invention] This invention divides the straw cutter with an openable/closable cover and the planted culm on the uncut land side into the draft laterally and outwardly as the aircraft advances, thereby changing the operating posture and the aircraft. Regarding a safety device for a working device such as a weeding rod that can be switched between a non-working position and a non-working position stored in a heap, the purpose of the safety device is to set the cover in a predetermined closed state in the case of the working device, for example, a straw removal cutter. There is a risk of the power transmission clutch for this cutter being accidentally engaged and activated even though the cutter is not in the correct position, or in the case of a weeding rod, even if it is not set in the desired weeding action position. The object of the present invention is to avoid the inconvenience in which a latch that runs regardless of the situation is accidentally activated and the planted culm is trampled over by the machine.

That is, the safety device for the working device according to the present invention is provided with a latch mechanism that allows the engagement of the power transmission clutch for the working device only when the working device is set to a predetermined working state, and The present invention is characterized in that it is provided with an alarm device that is activated by a slight movement of the clutch operating lever in the direction of the input operation when the check mechanism is in the check state, so in the case of the work device, for example, a straw removal cutter. In this case, the power transmission clutch for this cutter can be engaged only when the cover is set in a predetermined closed state, so this is caused by the clutch engagement operation when the cover is in the open position. It is possible to eliminate dangers and sufficiently ensure the safety of workers, and in the case of weeding rods, the latch that runs only when set in the specified weeding action position can be engaged. Since it can be operated, it is possible to prevent the planted culm from being accidentally trampled down due to the start of reaping work when the dividing rod is in a non-working position, thereby ensuring reliable and good reaping work. Furthermore, the work equipment can be brought into a predetermined work state by the activation of the alarm device 5, which can alert an auxiliary worker to set the work equipment to a predetermined work state. It has now become possible to start work safely, reliably, and efficiently in the set state.

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

1 and 2 show a combine harvester, in front of a threshing device I mounted on a fuselage 6 having a pair of left and right crawler-type traveling devices 24, 24, a pulling device 8, a clipper-type reaping device 9, and The threshing feed chain 1 gradually changes the posture of the husks that have been harvested in a vertical position to a sideways position.
Reaping section 12 consisting of vertical conveyance device 11 etc.
at the rear of the threshing device 7, and
Below the waste straw conveying device 13 that clamps the waste straw sent out by the feed chain 10 and conveys it inward and rearward in the width direction of the machine, there is a disk that shreds the waste straw into a plurality of pieces in the culm length direction. A type of waste straw cutter 1 and a dropper 14 for collecting a certain amount of waste straw and discharging it into the field are disposed, and between the pulling device 8 and the threshing device 7, a horizontal side portion of the vertical conveying device 11 is provided. The control section 15 is provided with an operating lever 4 for operating a tension-type power transmission clutch 2 for the straw removal cutter 1 on and off.

In addition, a cover that can be freely opened and closed is provided in an opening formed at a location opposite to the conveying end of the waste straw conveying device 13, and by opening and closing the cover 1A and turning on and off the clutch 2, the dropper 14 and the straw removal cutter 1 can be used selectively.

The safety device in the straw removal cutter 1 includes a third safety device.
It is constructed as shown in Figs.

That is, the clutch engagement position O of the clutch operating lever 4
The operation guide groove 17 is provided on a support shaft 18 provided near the center in the longitudinal direction of the operation guide groove 16 of the operation guide plate 17, which has an operation guide groove 16 for guiding the transition to the N or clutch disengaged position OFF. When the lever movement regulating piece 19 that can cut off the lever movement regulating piece 16 and the operating lever 4 that is in contact with this lever movement regulating piece 19 are slightly moved to the clutch engaged position ON side, in the clutch disengaged range. A cylindrical member 21 having a switch operating piece 20 for turning on the switch SW of the alarm device 5 is rotatably mounted around the axis of the support shaft 18, and one person can move the cover of the straw removal cutter 1 to a predetermined position. A restraining mechanism 3 is provided that allows the clutch operation lever 4 to be operated to the clutch engagement position ON only when the clutch is set to the closed state.

The restraining mechanism 3 protrudes into the rotational movement path of the locking piece 22 fixed to the cylindrical member 21 and supports the support shaft 1 of the cylindrical member 21.
A tensioning position and locking piece 22 that prevents rotation around the 8-axis center
A check metal fitting 3A that can be pivoted to a non-check position for retiring from the rotational movement path of the cover 1A, a detection switch 3B that detects that the cover 1A is in an open state, and a detection switch 3B based on the detection operation of the detection switch 3B. The said check fitting 3A
Solenoid 3 that forcibly switches the
C, and is configured to automatically release the check when the cover 1A is set to a predetermined closed state.

Further, a spring 23 is interposed between the operation guide plate 17 and the cylindrical member 21 to bias and hold the cylindrical member 21 in a state where the lever movement regulating protrusion 19 blocks the operation guide groove 16. are doing.

Note that R in the figure is a relay contact.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the safety device in the working device according to the present invention, and FIG. 1 is an overall side view of the combine harvester, and FIG.
The figure is an enlarged partially cutaway side view of the main part, Figure 3A is an enlarged cross-sectional plan view of the main part and its action diagram, Figure 4 is a sectional view taken along the line IV-IV in Figure 3A, and Figure 5 is an electrical circuit diagram of the main parts. DESCRIPTION OF SYMBOLS 1... Working device, 1A... Cover, 2... Power transmission clutch, 3... Checking mechanism, 4... Clutch operation lever 5... Alarm device.

Claims (1)

[Claims for Utility Model Registration] [F] A check mechanism 3 is provided that allows the power transmission clutch 2 to be engaged with respect to the working device 1 only when the working device 1 is set to a predetermined working state, and
A safety device for use in a work equipment, characterized in that a warning device 5 is provided which is activated by a slight movement of a clutch operation lever 4 in the direction of engagement when the check mechanism 3 is in a check state. ■ The work device 1 is a straw removal cutter, and when the cover is set in a predetermined closed state, the check mechanism 3 is automatically released as a utility model. A safety device in a working device according to claim 0.